2016年12月28日星期三
2016年12月27日星期二
The basic principle of submersible sewage pump
First, the basic principles
Submersible sewage pump is a kind of pump used in the environmental protection industry to transport solid-liquid mixed liquid such as solid particles, fiber, such as domestic sewage, industrial wastewater, mud and so on. WQ submersible sewage pump consists of sewage pump, sealing system, submersible motor, control and protection system, automatic installation system and other parts. And the general sewage pump is different: WQ-type submersible sewage pump and motor coaxial rotation, and dive into the liquid at the same time work. The pump sealing system can effectively prevent the liquid into the motor cavity, the protection of motor safe operation. Control and protection system to pump in the event of leakage, oil spills, overload, overheating, lack of equal fault, timely alarm and shutdown for repair.
Second, the technical key
Submersible sewage pump is a kind of pump used in the environmental protection industry to transport solid-liquid mixed liquid such as solid particles, fiber, such as domestic sewage, industrial wastewater, mud and so on. WQ submersible sewage pump consists of sewage pump, sealing system, submersible motor, control and protection system, automatic installation system and other parts. And the general sewage pump is different: WQ-type submersible sewage pump and motor coaxial rotation, and dive into the liquid at the same time work. The pump sealing system can effectively prevent the liquid into the motor cavity, the protection of motor safe operation. Control and protection system to pump in the event of leakage, oil spills, overload, overheating, lack of equal fault, timely alarm and shutdown for repair.
Second, the technical key
The automatic mounting system allows the pump to be automatically connected or disconnected from the piping system during installation and removal by a coupling device. WQ submersible sewage pump is an indispensable important equipment in water treatment. Its safe operation directly affects the entire water treatment system safe operation, therefore, in the WQ type submersible sewage pump, the most important question is guarantees the water pump use reliability, but affects the sewage pump use reliability the key question is the pump Sealing performance and no overload performance and important parts of the service life of the seal in the pump, we use the auxiliary impeller hydrodynamic seal and mechanical seal combination of new sealing technology, the sealing reliability has been greatly improved. In the absence of overload performance, we use the whole field theory of pump hydraulic design, while using dual-channel impeller, the pump not only has a greater capacity and more importantly, the pump in the entire range of power will not exceed Motor rated power using motor overload.
Multi-stage pump works
Multi-stage pump is a centrifugal pump, but also rely on the rotation of the impeller to obtain centrifugal force, thus the material. Until the gas density reaches the working range of the mechanical vacuum pump and is drawn out, thereby gradually obtaining a high vacuum. In the multi-stage pump is equipped with the appropriate amount of water as the working fluid. When the impeller clockwise rotation, the water was thrown around the impeller, due to the role of centrifugal force, the water to form a shape determined by the pump cavity of the approximate thickness of a closed ring. The inner surface of the lower part of the water ring is tangent to the impeller hub, and the upper inner surface of the water ring is in contact with the tip of the blade (actually the blade has a certain depth of insertion in the water ring).
At this point the wheel hub and the water ring between the formation of a crescent-shaped space, and this space is divided by the impeller and leaves the number of equal number of small cavity. If the impeller of the lower 0 ° as a starting point, then the impeller in the rotation 180 ° before the small chamber volume from small to large, and the end of the suction port connected, then the gas is inhaled, when the suction end of the small cavity When the impeller continues to rotate, the small cavity from large to small, so that the gas is compressed; when the small cavity and the exhaust port is connected, the gas will be discharged outside the pump.
To sum up, multi-stage pump is to rely on changes in the pump chamber volume to achieve suction, compression and exhaust, so it can be variable-volume centrifugal pump. Multi-stage pump can be used in petroleum, chemical, machinery, mining, light industry, medicine and food and many other industrial sectors. In many industrial processes, such as vacuum filtration, vacuum diversion, vacuum feed, vacuum evaporation, vacuum concentration, vacuum regain and vacuum degassing, multi-stage pump has been widely used. Can be extracted flammable, explosive gas, in addition to pumping dust, water gas, therefore, the increasing use of water ring pump.
2016年12月23日星期五
Submersible pump safety protection
Submersible pumps are often damaged by water shortages in the pool. In view of this situation, today you sort out the submersible pump several protection measures: water protection, motor leakage protection, oil chamber leakage protection, insulation resistance protection, winding overheating protection, bearing overheating protection.
1, prohibit the power supply voltage abnormal start
As the low-voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is below 198 volts, the line voltage is lower than 342 volts, submersible pump motor speed down, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in a long start winding power and even burn Windings and capacitors. Conversely, a high voltage causes the motor to overheat and burn out the winding. Therefore, the submersible pump in operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, higher than 10% of rated voltage above, the motor should stop running, find out the cause and troubleshooting.
2, confirm the correct direction of rotation of the motor
Should find out the direction of rotation of the motor, there are many types of high-lift submersible pumps are forward and reverse when the water can be, but the reversal of small water, the current is large, the reversal of a long time will damage the motor windings.
3, cable installation and submersible pump insulation resistance requirements
Install the submersible pump, the cable to overhead, the power cord should not be too long. Submersible pump into the water or put forward not to force the cable to avoid breaking the power cord. Do not sink submerged pump in the mud, otherwise it will lead to bad motor cooling and burn motor winding. Installation, the motor insulation resistance should not be less than 0.5 megohm.
4, to avoid frequent switching
Do not frequently switch the submersible pump, this is because the pump will stop when the return flow, if immediately start, the motor load will start, resulting in too large starting current and burn the winding. Due to the large current at start-up, the frequent start-up also burns the submersible pump motor windings.
5, the installation of leakage protection
Leakage protector, also known as Pauling device, its role from the Pauling device these three words can be understood. Because the submersible pump in the water, easy to leakage caused by power loss or even lead to electric shock accident. If the leakage protector is installed, the leakage protector will cut off the power of the submersible pump to ensure the safety and avoid the leakage and waste of the electric energy as long as the leakage value of the submersible pump exceeds the operating current value of the leakage protector (usually not more than 30mA).
6, prohibit long-term overload pump work
In order to avoid the long-term overload of submersible pumps, do not draw large amounts of sediment water and observe whether the current value specified in the nameplate value, if the current is too large, should stop inspection. In addition, the dehydration pump running time should not be too long, so as not to make the motor overheating and burned.
7, focus on routine maintenance
Usually check the motor, if found under the cover of a crack, rubber seal ring damage or failure, should be replaced or repaired in order to prevent water penetration into the machine.
8, try to avoid low-voltage boot
If the voltage is too high, it will cause the motor to overheat and burn out the winding. If the voltage is too low, the motor speed will decrease. If it does not reach 70% of the rated speed, the centrifugal switch will close, causing the start winding Long-term power and heat or even burn out the winding and capacitors. Do not frequently switch the motor, this is because the pump will stop when the return flow, if the immediate start, the motor load will start, resulting in starting current is too large and burn out the winding.
2016年12月22日星期四
Characteristics and maintenance of vertical sewage pump
Vertical sewage pump can be moved, can also be fixed for the construction, irrigation and drainage, enterprises and institutions in the process of sewage, pumping and transportation, in addition to the application of sewage, but also for the hydrophobic pump, pulp pump, irrigation With, can also be used for water and weak corrosive media. Now to introduce the characteristics of the vertical sewage pump and maintenance methods.
First, the pipeline sewage pump product characteristics
(1) sewage capacity, no clogging.
(2) the design is reasonable, supporting the motor power is small, energy-saving effect is remarkable.
(3) the use of wear-resistant mechanical seal.
(4) compact, easy to move, easy to install, no need to build the pump house, reduce project cost.
(5) can run in the whole head range, and ensure that the motor is not overloaded.
(6) inlet and outlet center line in a straight line, can be installed directly in the pipeline anywhere.
Second, the sewage pump maintenance and repair
(1) check the sewage pump piping and the junction with or without loosening. Turn the sewage pump by hand, see whether the sewage pump is flexible.
(2) to the bearing body by adding bearing lubricating oil, observe the oil level should be at the center of the oil standard, the oil should be replaced or added.
(3) unscrew the sewage pump pump body water plug, irrigation diversion (or cited pulp). Self - priming sewage pump.
(4) close the outlet valve and outlet pressure gauge and import vacuum gauge.
(5) Jog motor, see whether the motor steering is correct.
(6) start the motor, when the normal operation of the sewage pump, open the outlet pressure gauge and the import of vacuum pumps, as they show the appropriate pressure, and gradually open the gate valve, and check the motor load.
(7) try to control the flow of sewage pump and head in the range specified on the plate to ensure that the sewage pump in the highest efficiency point of operation, in order to obtain the greatest energy saving effect.
(8) sewage pump during operation, the bearing temperature can not exceed the ambient temperature of 35C, the maximum temperature of not more than 80C.
(9) If there is abnormal sound of sewage pump should immediately stop to check the cause.
(10) Sewage pump to stop using, first close the gate valve, pressure gauge, and then stop the motor.
(11) in the open pump sewage pump in the first month of work, after 100 hours of replacement of lubricating oil, after each 500 hours, oil change time.
(12) often adjust the packing gland, packing room to ensure that the normal drip (in order to drip out into the appropriate).
(13) periodic inspection sleeve wear, wear should be replaced after a large.
(14) sewage pump used in the winter season, after parking, need to pump the lower part of the water plug screwed open the media release the net. To prevent cracking.
(15) long-term suspension of sewage pumps, pumps need to open all, dry the water, the rotating parts and joints coated with grease installed.
2016年12月21日星期三
How to Reduce Energy Consumption of Pump in Spring
The advent of the spring, the use of pumps will enter the peak period, how to use the pump, pay attention to what issues can reduce energy consumption cost savings?
First, the pump surface and pressure water chamber (also known as volute) on the surface of rust.
Surface corrosion bumps will reduce pump water 7% -8%; maintenance only steel brush and iron sandpaper or grinding wheel smooth, you can make it in the work of fuel consumption or power consumption reduced by 9% -14%.
Second, the seal ring gap increases
According to the test when the impeller radius in the direction of the gap increased by 4 mm, thepump water will be reduced by 10%; maintenance only with organic adhesive plus asbestos back to the factory-defined gap, you can make the pump fuel consumption at work or electricity Consumption reduced by 10% -12%.
Third, the pressure chamber and impeller axis does not coincide
When the pressure chamber and the impeller axis deviation of 2 mm or more than 2 degrees, the pump water will be reduced by 5% -6%; maintenance only careful measurement, carefully identify the location coincides with the axis coincidence, you can make the pump Reduced oil or power consumption by 6% to 7% during operation.
2016年12月20日星期二
2016年12月18日星期日
Structure of pressurized water chamber of sewage pump
Sewage pump used in the pressurized water chamber is the most common volute, built-in submersible pumps in the choice of radial guide vane or flow channel guide vane. Volute spiral, ring and intermediate type three.
Centrifugal pump (except self-priming pump) should be before the start of the pump and the inlet pipe filled with water, centrifugal pump before filling the water there are two main methods: one is the use of assembly bottom valve filled with water. Otherwise the pump is unable to lift the work of the centrifugal pump does not start after the water is often due to pump the air is not drained, the water has not been filled due.
Insoluble sulfur production process, the high temperature insoluble sulfur quenching liquid to be quenched by the quenching liquid to be quenched by the centrifugal pump to complete, because the quenching liquid has a more corrosive, with a pump to stop the pump frequently, so the operator of the Irrigation pump is quite critical of the urgent urge to change the cumbersome and primitive pump method.
After analysis and study, decided to take the following methods to change irrigation pump operation, thus avoiding the need to pump every pump before the trouble, as shown in Figure 1, in the centrifugal pump inlet before adding a keg, installation, Keg bottom is not lower than the highest point of centrifugal pump casing, open the pump from the keg above the flange hole filled with quenching liquid, and then sealed with a blind flange flange, so that as long as a pump, No need to re-irrigation pump, which greatly improved the operator's working conditions.
2016年12月16日星期五
2016年12月15日星期四
Why pump vibration was badly
Pump in the operation of why the vibration, many people are worried, then we look at the reasons for the next pump vibration.
Pump vibration of the powerful reasons:
First, the mechanical side
Vibration can be felt out, hand touch the motor side, the pump head side, if only the motor vibration, it may couplings, or motor bearing problems. If only the pump head vibration, it may pump head bearings, mechanical seals, or impeller nut, or cavitation and other reasons. If the overall vibration, check the foot, you can also listen to the ear close to different parts, usually in the fault location to hear the more obvious noise. If you see the machine seal leakage, the possibility of mechanical seal burn out. Or the quality of the motor and pump rotating parts imbalance, shoddy, poor installation quality, the unit axis asymmetry, swing over the allowable value of parts of the mechanical strength and poor rigidity, bearing and seal components wear and tear, and the pump critical speed appears and The natural frequency of the unit has been caused by the resonance, will have a strong vibration and noise. 1, first check the foundation is fixed, base bolts are loose; 2, the impeller lock mother is loose; 3, the coupling is good; 4, the spindle is bent; 5, pump and motor bearings run outside, 8, also depends on the situation of the material, whether the viscosity is too large; 9, the suction tube is not too large; 9, the suction tube is not too strong; Or whether the filter is blocked; 10, suction pipe is too shallow into the liquid surface.
Second, the hydraulic aspects
Pump inlet flow velocity and pressure distribution is not uniform, the pump inlet and outlet working fluid pressure pulsation, liquid flow, bias and flow, non-rated conditions and a variety of reasons such as pump cavitation, are common cause pump unit vibration s reason. Pump start-up and shutdown, valve opening and closing, changes in working conditions and emergency shutdown and other dynamic transition process caused by rapid changes in water pressure within the pipeline and water hammer, etc., often lead to pump and unit vibration.
Third, the electrical aspects
Motor is the main equipment unit, the motor internal magnetic imbalance and other electrical system disorders, often caused by vibration and noise. If the asynchronous motor in operation, stator and rotor by the harmonic magnetic flux interaction between the stator and rotor radial alternating magnetic tension, or large-scale synchronous motor in operation, the rotor magnetic center is inconsistent or in all directions air gap Exceeding the allowable deviation value, etc., may cause the motor to periodically vibrate and make noise. Check whether the three-phase motor is running balance, check the power frequency is stable.
Fourth, water aspects
The design of the inlet passage is unreasonable or does not match with the unit, the submergence depth of the pump is improper, and the sequence of starting and stopping of the unit is unreasonable, which will make the water condition deteriorate, produce vortex, induce cavitation or aggravate the vibration of unit and pump house. When the siphon vacuum interrupting unit is used, if the humping air is difficult to be carried, the siphon time is too long; when the shutter door is broken, the unit door design is unreasonable; when it is closed, it constantly hits the door; Pump and motor base uneven subsidence or poor rigidity of the foundation and other reasons, will also lead to unit vibration.
Fifth, the process
1, check whether the pump in the design of the Ministry of Industry and run: head, flow, water temperature, vacuum suction height, etc. (is present in the cavitation conditions).
2, check the pump inlet and outlet valves are intact.
3, check the water is entrained with air or other gases.
4, check the pump outlet pipeline is not exhausted the existence of the phenomenon of air.
5, check the pump inlet leak.
2016年12月14日星期三
2016年12月4日星期日
Failure Cause of Turbine Worm Wheel of Submerged Sewage Pump
Turbine oil tank contains more free water. As the worm gear drive by the meshing of the tooth surface to achieve its friction surface must establish the extreme pressure lubricating film, it is the lubricant in the extreme pressure agent and metal surface reaction generated by the lubricating film, which has high strength, can withstand The load produced by the worm gear meshing. Lubricant with water will cause extreme pressure inactivation, the meshing surface can not form a lubricating film, resulting in direct contact with the surface of the worm, causing surface wear. As the worm gear material is tin bronze (code ZQSn10-1), the allowable contact stress is 220MN / m2, while the worm is made of alloy steel (steel: 35CrMo), the allowable contact stress 850MN / m2, relative to the worm worm Soft, so the failure of the form of performance for the worm gear tooth wear.
We carried out a comprehensive analysis of the lubricating oil system, and finally confirmed: the oil system from the steam turbine seal leakage of steam condensate. As the turbine insulation is sealed very well, part of the leakage of steam will inevitably enter the oil seal through the bearing oil system.
In order to solve the problem of worm gear failure caused by oil water, we sampled and analyzed the water content of lubricating oil every month according to the random operation manual of turbine. We regularly drained water from the bottom of the tank and set up the relevant management system.
After the above improvement measures, E-GT501 turbine from October 2000 put into operation, the normal operation has reached more than 2 years, still no signs of damage, for the stable operation of the device provides a strong guarantee, the turbine can balance each year Medium-pressure steam 8,000 tons, the annual energy-saving 15Kw × 8000h = 120000 degrees, 0.6 yuan per degree basis, the annual savings of 72,000 yuan electricity, the economic benefits are obvious.
Due to the lack of the original design gear tooth contact strength, the frequent failure of the turbo-worm gear was changed. By changing the material of the worm wheel, the relevant management system was established according to the requirement and solved the problem. With the increase in the introduction of foreign equipment in China, according to the differences in conditions of the original design conditions for verification, in the process of localization of spare parts should be taken seriously. The solution process of turbine turbine failure problem of liquid sewage pump has certain reference significance
We carried out a comprehensive analysis of the lubricating oil system, and finally confirmed: the oil system from the steam turbine seal leakage of steam condensate. As the turbine insulation is sealed very well, part of the leakage of steam will inevitably enter the oil seal through the bearing oil system.
In order to solve the problem of worm gear failure caused by oil water, we sampled and analyzed the water content of lubricating oil every month according to the random operation manual of turbine. We regularly drained water from the bottom of the tank and set up the relevant management system.
After the above improvement measures, E-GT501 turbine from October 2000 put into operation, the normal operation has reached more than 2 years, still no signs of damage, for the stable operation of the device provides a strong guarantee, the turbine can balance each year Medium-pressure steam 8,000 tons, the annual energy-saving 15Kw × 8000h = 120000 degrees, 0.6 yuan per degree basis, the annual savings of 72,000 yuan electricity, the economic benefits are obvious.
Due to the lack of the original design gear tooth contact strength, the frequent failure of the turbo-worm gear was changed. By changing the material of the worm wheel, the relevant management system was established according to the requirement and solved the problem. With the increase in the introduction of foreign equipment in China, according to the differences in conditions of the original design conditions for verification, in the process of localization of spare parts should be taken seriously. The solution process of turbine turbine failure problem of liquid sewage pump has certain reference significance
Oil Recovery Technology of Submersible Electric Pump
1.1.2 Working principle The pump is installed above the hydraulic packer. The seal pump is used to seal the centrifugal pump, the protector and the motor. Only the sieve pipe and the oil pipe are connected through the packer to communicate with the lower reservoir. Below the packer Of the liquid into the unit through the tubing and sealed tube of the annular space into the suction port, the role of the centrifugal pump out of the wellhead.
1.1.3 Sealing scheme The upper sealing principle As shown, remove the cable sheathing and expose the three wires from the through hole in the sealing flange. The two ends of the wire are covered with sealing rubber, and then on the rubber side and Above were covered with baffle, tighten the wire block, so sealed.
1968-), Shandong Linyi, undergraduate, engineer, mainly engaged in work for the oil field law and order fire and rescue.
The principle of the lower seal as shown, the external use of the guide with the shroud connection, through the thread to seal; internal short section of the screen from the middle hole through the guide device, through the apron with the guide device to seal.
- tubing head production tubing centrifugal pump top seal suction port shroud protector submersible motor sieve seal wire block plug seal pad variable diameter coupling packer tubing rock layer aquifer rock layer out of the oil column matching composition 1.1.4 Performance characteristics Isolation of the upper liquid, to achieve a single bottom of the reservoir exploitation, while the motor and sealed tube between the annular space decreases, speed up the well fluid flow, effectively reduce the motor temperature is conducive to the normal long-term operation of the unit. Has the following characteristics: without affecting the normal work of the pump case, to prevent the upper part of the oil or water pollution caused by the increase in water content; further excavation casing damage potential production to restore the production loss; low cost, easy Operation, but the use of significant results; further enrich and optimize the stratified oil production process, improved oil recovery.
Cable Seal Seal Rubber Seal Flange Top Seal Principle 1 point Seal Flange Schematic Motor-Guide 'Lower Seal Principle 1.2 Job Requirements Shroud Seal Apron Reducing Guide Schematic The program is an increase in the upper part of the shroud (At least more than 24 meters); the installation of a workover rig that is capable of lifting more than 35 meters (at least greater than 24 meters); installation of the workover rigs; The process of the need for shroud installation, cable sealing and cable connection operation, the installation time relative to the general pump longer, in addition to providing the necessary assistance, the well killing and other appropriate security measures; downhole process to control the speed, to prevent bump Cable, damaged seal or shroud.
2.2 The main configuration of the submersible pump technology (4) power cables, transformers, control cabinets, etc. 2.2 size data calculation Shield higher than the pump head 37mm, the next section pump length 5377.7mm, motor length 8248.3mm, protector Length 3406.2mm, the middle shackle 35x2mm shroud, three shrouds (down to page 59) for the general browsing staff to view the download, the background by the relevant management personnel to upload information, through / dismissed, publishing and other operations.
Front - end interface background interface hardware system selection and requirements 2000 operating system and Oracle8i relational database management system.
2000 or Linux operating system and Tomcat5.0 application server.
2000 (XP) operating system, browser IE5.5 and above and Office2000 or above.
Uploading of process resources The integrated process resources are classified, reviewed, modified and uploaded according to the system board.
(3) the application of resource information system and the realization of the function of process information system resources through the installation, testing, commissioning, modification, improvement, to achieve the following functions: (1) resource specific expression function, the different types of process resources (2) to organize and manage the extensive resources systematically; to provide query, retrieval and download of resources; to realize the hierarchical rights management and security control of resources; to pool resources and realize the sharing of resources .
1.1.3 Sealing scheme The upper sealing principle As shown, remove the cable sheathing and expose the three wires from the through hole in the sealing flange. The two ends of the wire are covered with sealing rubber, and then on the rubber side and Above were covered with baffle, tighten the wire block, so sealed.
1968-), Shandong Linyi, undergraduate, engineer, mainly engaged in work for the oil field law and order fire and rescue.
The principle of the lower seal as shown, the external use of the guide with the shroud connection, through the thread to seal; internal short section of the screen from the middle hole through the guide device, through the apron with the guide device to seal.
- tubing head production tubing centrifugal pump top seal suction port shroud protector submersible motor sieve seal wire block plug seal pad variable diameter coupling packer tubing rock layer aquifer rock layer out of the oil column matching composition 1.1.4 Performance characteristics Isolation of the upper liquid, to achieve a single bottom of the reservoir exploitation, while the motor and sealed tube between the annular space decreases, speed up the well fluid flow, effectively reduce the motor temperature is conducive to the normal long-term operation of the unit. Has the following characteristics: without affecting the normal work of the pump case, to prevent the upper part of the oil or water pollution caused by the increase in water content; further excavation casing damage potential production to restore the production loss; low cost, easy Operation, but the use of significant results; further enrich and optimize the stratified oil production process, improved oil recovery.
Cable Seal Seal Rubber Seal Flange Top Seal Principle 1 point Seal Flange Schematic Motor-Guide 'Lower Seal Principle 1.2 Job Requirements Shroud Seal Apron Reducing Guide Schematic The program is an increase in the upper part of the shroud (At least more than 24 meters); the installation of a workover rig that is capable of lifting more than 35 meters (at least greater than 24 meters); installation of the workover rigs; The process of the need for shroud installation, cable sealing and cable connection operation, the installation time relative to the general pump longer, in addition to providing the necessary assistance, the well killing and other appropriate security measures; downhole process to control the speed, to prevent bump Cable, damaged seal or shroud.
2.2 The main configuration of the submersible pump technology (4) power cables, transformers, control cabinets, etc. 2.2 size data calculation Shield higher than the pump head 37mm, the next section pump length 5377.7mm, motor length 8248.3mm, protector Length 3406.2mm, the middle shackle 35x2mm shroud, three shrouds (down to page 59) for the general browsing staff to view the download, the background by the relevant management personnel to upload information, through / dismissed, publishing and other operations.
Front - end interface background interface hardware system selection and requirements 2000 operating system and Oracle8i relational database management system.
2000 or Linux operating system and Tomcat5.0 application server.
2000 (XP) operating system, browser IE5.5 and above and Office2000 or above.
Uploading of process resources The integrated process resources are classified, reviewed, modified and uploaded according to the system board.
(3) the application of resource information system and the realization of the function of process information system resources through the installation, testing, commissioning, modification, improvement, to achieve the following functions: (1) resource specific expression function, the different types of process resources (2) to organize and manage the extensive resources systematically; to provide query, retrieval and download of resources; to realize the hierarchical rights management and security control of resources; to pool resources and realize the sharing of resources .
2016年12月1日星期四
How to reduce the noise of the sewage pump?
Noise is a serious problem in recent years, the community has been concerned but how can not solve the outdoors, ubiquitous noise with you want to walk to the eardrum, Ann quietly will not work, home will be all kinds of noise continue to plague, sewage pump noise is one of the sources. A lot of residential district environment in order to install sewage pump , but the noise is large, many residential tenants are noise of the sewage pump to spiritual pollution, the night is often quarrel can't sleep, children and elderly households is more serious. Therefore, we need to reduce the noise generated by the pump, the specific operation is divided into the following six steps:
1, each unit should be set up a separate foundation to prevent resonance, the pump foundation should be based on the weight of a large, and should be provided with a rubber vibration isolation pad vibration, thereby reducing the vibration noise;
2, the sewage pump suction pipe and outlet pipe should be installed on the flexible rubber joint, flexible rubber pipes of different diameter pipe. The number of base isolated generally each flexible rubber joint insertion loss is 15 20dB to estimate the isolation effect of isolation pipe fittings;
3, the pressure pipe on the installation of water hammer eliminator;
4, the sewage pumping station should not be placed directly on the window window wells;
5, with the sewage pump connected to the pipeline, should support vibration isolation measures, pipeline crossing roof or side walls of the pump should be installed between the casing and the casing pipe filled with non combustible flexible materials;
6, reduce the noise, should give priority to the use of low speed vertical pump.
What are the reasons for the sewage pump of the diesel engine?
1, the water inlet pipe and pump body with air:
(1) before the start of the pump is not filled with enough water, sometimes it looks like the water has been poured from the bleed hole overflow, but did not turn the pump shaft to the air completely discharged, resulting in a little air left in the water pipe or pump body.
(2) in contact with the water pump inlet of the horizontal application of reverse flow direction, fell more than 0.5% slope, connect one end of the highest import pumps, do not completely level. If the upward tilt, will be retained within the inlet air, reduce water pipes and pumps in the vacuum, the impact of water.
(3) pump packing has been used for long-term wear or packing pressed too loose, discharge gap caused by the large amounts of water from filling with the shaft sleeve, the external air gap into the pump from the inside, affected the water.
(4) due to the long-term potential of the water pipe, the pipe wall corrosion appear holes, water pump works, the water continued to decline, when these holes exposed, the air from the hole into the water inlet pipe.
(5) there is a crack in the water inlet pipe bend pipe, the water inlet pipe and the water pump connection in the small gap, it is possible to make the air into the water inlet pipe.
2, pump speed is too low:
(1) human factors. Some users because of original motor damage, may be accompanied by another motor, resulting in a flow of small, low head or even the consequences of Sheung shui.
(2) mechanical failure of the pump itself. Impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in multi impeller, direct friction with the pump body, or bearing damage, it is possible to reduce the pump speed.
(3) power machine maintenance. Motor due to the winding burn, and loss of magnetism, maintenance of the winding turns, wire diameter, wiring method changes, or the failure of the maintenance of the fault is not completely eliminated factors will make the pump speed change.
3, suction process is too large:
Some of the water is deep, some of the surrounding terrain is relatively flat, while ignoring the pump allows suction process, resulting in less water absorption or not the result of water suction. To know that the vacuum degree of the pump suction mouth is limited, the absolute vacuum suction process is about 10 meters high water column, while the pump can not establish an absolute vacuum. And a large vacuum, easy to make the pump water vapor, the pump work. Therefore, the centrifugal pump has its maximum allowable suction process, generally between 8.5 - 3 meters. The installation of the pump can not only facilitate simple drawings.
4, the flow of water in and out of the resistance loss is too large
Some users have been measured, although the water tank or water tower to the vertical distance the water is slightly less than the pump head, but a little water or no water. The reason is that the pipe is too long, the water pipe bends more, the water flow in the pipeline resistance loss is too large. The reason is that the pipe is too long, the water pipe bends more, the water flow in the pipeline resistance loss is too large. Under normal circumstances 90 degrees bend than 120 degrees, the resistance is large, every 90 degrees bend head loss of about 0.5-1 meters, meters per 20 meters of resistance can make the head loss of about 1 meters. In addition, some users are free to pump inlet, outlet pipe diameter, which has a certain impact on the head.
5, the impact of other factors
(1) at the end of valve to open. Is usually set aside a long time due to water pump, valve gasket is stuck, no washer valve may be rust.
(2) filter mesh bottom valve is blocked; or potential water valve at the end of the sludge layer caused by the blockage of the strainer.
(3) impeller wear is serious. Impeller blades have been worn for a long time, which affects the performance of the pump.
(4) gate valve can check valve failure or blockage will cause flow to reduce or even draw no water.
(5) the leakage of the export pipeline will also affect the water extraction.
(1) before the start of the pump is not filled with enough water, sometimes it looks like the water has been poured from the bleed hole overflow, but did not turn the pump shaft to the air completely discharged, resulting in a little air left in the water pipe or pump body.
(2) in contact with the water pump inlet of the horizontal application of reverse flow direction, fell more than 0.5% slope, connect one end of the highest import pumps, do not completely level. If the upward tilt, will be retained within the inlet air, reduce water pipes and pumps in the vacuum, the impact of water.
(3) pump packing has been used for long-term wear or packing pressed too loose, discharge gap caused by the large amounts of water from filling with the shaft sleeve, the external air gap into the pump from the inside, affected the water.
(4) due to the long-term potential of the water pipe, the pipe wall corrosion appear holes, water pump works, the water continued to decline, when these holes exposed, the air from the hole into the water inlet pipe.
(5) there is a crack in the water inlet pipe bend pipe, the water inlet pipe and the water pump connection in the small gap, it is possible to make the air into the water inlet pipe.
2, pump speed is too low:
(1) human factors. Some users because of original motor damage, may be accompanied by another motor, resulting in a flow of small, low head or even the consequences of Sheung shui.
(2) mechanical failure of the pump itself. Impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in multi impeller, direct friction with the pump body, or bearing damage, it is possible to reduce the pump speed.
(3) power machine maintenance. Motor due to the winding burn, and loss of magnetism, maintenance of the winding turns, wire diameter, wiring method changes, or the failure of the maintenance of the fault is not completely eliminated factors will make the pump speed change.
3, suction process is too large:
Some of the water is deep, some of the surrounding terrain is relatively flat, while ignoring the pump allows suction process, resulting in less water absorption or not the result of water suction. To know that the vacuum degree of the pump suction mouth is limited, the absolute vacuum suction process is about 10 meters high water column, while the pump can not establish an absolute vacuum. And a large vacuum, easy to make the pump water vapor, the pump work. Therefore, the centrifugal pump has its maximum allowable suction process, generally between 8.5 - 3 meters. The installation of the pump can not only facilitate simple drawings.
4, the flow of water in and out of the resistance loss is too large
Some users have been measured, although the water tank or water tower to the vertical distance the water is slightly less than the pump head, but a little water or no water. The reason is that the pipe is too long, the water pipe bends more, the water flow in the pipeline resistance loss is too large. The reason is that the pipe is too long, the water pipe bends more, the water flow in the pipeline resistance loss is too large. Under normal circumstances 90 degrees bend than 120 degrees, the resistance is large, every 90 degrees bend head loss of about 0.5-1 meters, meters per 20 meters of resistance can make the head loss of about 1 meters. In addition, some users are free to pump inlet, outlet pipe diameter, which has a certain impact on the head.
5, the impact of other factors
(1) at the end of valve to open. Is usually set aside a long time due to water pump, valve gasket is stuck, no washer valve may be rust.
(2) filter mesh bottom valve is blocked; or potential water valve at the end of the sludge layer caused by the blockage of the strainer.
(3) impeller wear is serious. Impeller blades have been worn for a long time, which affects the performance of the pump.
(4) gate valve can check valve failure or blockage will cause flow to reduce or even draw no water.
(5) the leakage of the export pipeline will also affect the water extraction.
Failure and elimination method of vertical pipeline centrifugal pump
ISG vertical pipeline centrifugal pump, pipeline pump, also known as centrifugal pump, centrifugal pump, single stage centrifugal pump, vertical pump, booster pump, hot water pump, circulating pump, booster pump, using IS type single-stage single suction centrifugal pump performance parameters, a clever combination is designed based on general vertical the pump, and the use of temperature, medium in different ISG derived on the basis of the application of hot water, high temperature corrosion resistant chemical pump, oil pump. The series of products with high efficiency and energy saving, low noise, reliable performance and other advantages, in line with the latest National Machinery Department JB/T53058-93 standard requirements, the product according to the international ISO2858 standard design and manufacture.
ISG type vertical pipeline centrifugal pump barrier and eliminating method:
1.ISG vertical pipeline centrifugal pump installation is reasonable, the normal operation and service life of the pump has a very important influence, so the installation and correction must be carefully carried out.
2 control installation size embedded anchor bolt, make concrete foundation work.
3 to be the basis of cement solidification, the pump is mounted on the basis of the application level of the level of the pump and motor shaft inspection apparatus, such as level is adjusted until the level of application of shim, adjusting properly tighten the foot nut,
4 check the pump rotating parts are stuck rubbing, should strictly check the pump shaft and the motor coaxial, can regulate the thin concentric, finally hand rotation coupling, easy rotation even without rubbing is normal.
5 pump suction and discharge pipeline should have their own support, does not allow the weight of the pipeline directly to bear by the pump, so as not to pump down,
The installation position is higher than the water level (6 pump in the pump suction permitted), at the end of suction line should be installed on the bottom and the discharge pipe arranged on the liquid filling hole or valve, for the pump before starting liquid injection; pump installation position below the surface, in the suction pipe on the press install control valve and filter device, to prevent debris into the pump, filter area should be more than 3-4 times the area of the pipeline.
7 high lift pump in the outlet flow control valve on the outer end of the pipeline should also be installed check valve to prevent sudden stop when the water hammer damage.
8 must ensure that the pump installation height is in line with the pump cavitation margin, and consider the pipeline loss and medium temperature.
ISG type vertical pipeline centrifugal pump barrier and eliminating method:
1.ISG vertical pipeline centrifugal pump installation is reasonable, the normal operation and service life of the pump has a very important influence, so the installation and correction must be carefully carried out.
2 control installation size embedded anchor bolt, make concrete foundation work.
3 to be the basis of cement solidification, the pump is mounted on the basis of the application level of the level of the pump and motor shaft inspection apparatus, such as level is adjusted until the level of application of shim, adjusting properly tighten the foot nut,
4 check the pump rotating parts are stuck rubbing, should strictly check the pump shaft and the motor coaxial, can regulate the thin concentric, finally hand rotation coupling, easy rotation even without rubbing is normal.
5 pump suction and discharge pipeline should have their own support, does not allow the weight of the pipeline directly to bear by the pump, so as not to pump down,
The installation position is higher than the water level (6 pump in the pump suction permitted), at the end of suction line should be installed on the bottom and the discharge pipe arranged on the liquid filling hole or valve, for the pump before starting liquid injection; pump installation position below the surface, in the suction pipe on the press install control valve and filter device, to prevent debris into the pump, filter area should be more than 3-4 times the area of the pipeline.
7 high lift pump in the outlet flow control valve on the outer end of the pipeline should also be installed check valve to prevent sudden stop when the water hammer damage.
8 must ensure that the pump installation height is in line with the pump cavitation margin, and consider the pipeline loss and medium temperature.
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