Shielding Pump
Shield pump is mainly used to transport flammable, explosive, highly toxic and other petrochemical liquids in order to improve the safety and reliability of petrochemical plant operation.
Your Leading Taizhou Inwon Technology Co.,Ltd. Supplier
Taizhou Inwon Technology Co.,ltd is a professional enterprise in the production of water pumps. Located in Daxi Town, Wenling Taizhou City, Zhejiang of China, which is well known as"Hometown of Water Pump".
Taizhou Inwon Technology Co.,ltd is engaged in various kinds of high quality permanent magnet variable frequency water pumps, such as booster pumps, self priming pumps, multi-stage pumps, shield circulation pumps, motors, etc.
As the innovator and leading manufacturer of Automatic permanent magnet variable frequency water pumps and motors in China, we always keep excellence and make progress constantly.
Our mission is to provide the best reliable quality permanent magnet variable frequency water pump and motor at competitive price to meet our customers.
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A machine, tool or instrument designed with advanced technology and functionality to perform highly specific tasks with greater precision, efficiency and reliability.
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What is Shielding Pump?
Shield pump is mainly used to transport flammable, explosive, highly toxic and other petrochemical liquids in order to improve the safety and reliability of petrochemical plant operation.
The shield pump connects the pump and the motor. The rotor of the motor and the impeller of the pump are fixed on the same shaft. The shield sleeve is used to separate the rotor and the stator of the motor.
Totally enclosed:There is no dynamic seal on the structure, only static seal at the pump shell, so it can be completely leak-free, especially suitable for conveying flammable, explosive, precious liquids and toxic, corrosive and radioactive liquids.
High safety:The rotor and stator each have a shielding sleeve so that the motor rotor and stator do not come into contact with the material, even if the shielding sleeve is broken, there is no danger of external leakage.
Compact structure and small area
The pump and the motor are a whole unit, so there is no need to find the center for disassembly and assembly. Low requirements for base and foundation, and less daily maintenance workload, low maintenance costs.
Smooth running, low noise, no need to add lubricating oil
Since there is no rolling bearing and motor fan, no need to add lubricating oil, and low noise.
Wide range of use
For high temperature, high pressure, low temperature, high melting point and other working conditions can meet the requirements.
Civil use
- Ground source heat pump air conditioning circulating water system;
- LiBr air conditioning unit air conditioning pump, transformer oil pump, locomotive pump, etc;
- Heating and circulating water system;
- Fire water pressurization system;
- Tap water pressurization system.
Industry and military aerospace
- Transportation of toxic and harmful liquid for chemical and pharmaceutical industries;
- Fueling before launch of space rocket;
- Nuclear grade shielded electric pump for nuclear power plant.
The shield pump uses the same shaft to fix the rotor of the motor and the impeller of the pump together, and then uses the shield sleeve to shield this group of rotors. The stator of the motor surrounds the shield sleeve. The shield sleeve is made of metal, so the power can be transmitted to the rotor through the magnetic field. The whole rotor is running in the pumped liquid. The end of the shield depends on the flange or welded structure The shield is actually a pressure vessel.
In addition to the shielding sleeve, there is also a circulating pipe. The use of pumped liquid plays a very important role in bearing lubrication and cooling, and sometimes motor cooling.
The inner surface of the stator and the outer surface of the rotor are equipped with the stator shield sleeve and the rotor shield sleeve made of corrosion-resistant metal sheet. Each end face is welded with them with corrosion-resistant metal sheet. They are separated from the transported liquid, so that the stator winding core and the rotor core are not corroded.
Generally, a small part of delivered liquid (about 1% – 3% of total flow) is introduced into the circulation pipe from the pump discharge. After filtering, it passes through the circulation pipe, first lubricating and cooling, then bearing, then cooling through the clearance between the stator shield and the rotor shield, then lubricating and cooling the front bearing, and finally returning to the impeller inlet hole through the impeller balance hole.
The shield sleeve of the shield pump, that is, the stator shield sleeve and the rotor shield sleeve, is used to prevent the transmission medium from being immersed in the stator winding and the rotor core. However, due to the existence of the shield sleeve, the gap between the motor stator and the rotor increases, resulting in eddy current in the shield sleeve, resulting in the decrease of the motor performance and the increase of the power loss
Material of Shielding Pump
In order to reduce the power loss, the inner diameter of the stator of the shield motor is usually small, the wall thickness of the shield sleeve is as thin as possible, and the shield sleeve material is non-magnetic material. Therefore, the shield motor is usually a slender structure. Most of the shield sleeve materials are 304, 304L and 316316L stainless steel. Although the eddy current loss of Hastelloy C and titanium materials is small, but the cost is high, so they are rarely used. The thickness of the shield sleeve is generally 0.2-1mm.
How to Maintain Shielding Pump
Should always check the smooth flow of cooling water to ensure that the pump surface temperature does not exceed the specified value, but also pay attention to saving water
To always check the TRG instructions, such as the occurrence of abnormal to decisive processing;
Check the pressure instructions, the entrance filter blockage, if necessary, to clean up;
Check the operation of sound, vibration, leakage and other abnormalities and to deal with;
To adjust the outlet valve to ensure that it does not overload operation;
Shielding pump troubleshooting reference instructions and shielding pump failure and its causes and solutions;
long-term use should be pump cooling water, the media clean to ensure that it does not rust and frost
What Is the Working Principle of an Shielding Pump
The driver of the ordinary shielding pump uses the axle of the pump to connect the pump's leaf shaft to the motor shaft to ensure that the impeller and the motor rotate together. The shielding pump is a structure of a dense seal pump. The driving motor and the pump are sealed in a pressure container filled by the pumping medium. At this time, there is only a quiet sealed sealed in the pressure container and the rotation is improved by a wire group to improve the rotation. The magnetic field is driven by the rotor. The structure of the shielding pipe pump replaces the rotating shaft seal device of the traditional centrifugal pump, which can achieve a full seal zero leakage. The motor rotor of the shielding cycle pump and the impeller of the pump is fixed on the same axis, and the motor is Talk about the energy -saving technology of energy -saving water pumps
Special surface special treatment technology
Stainless steel or copper impeller uses Silicon solidarium casting process, while cast iron impelios are used for film sand casting process. The double curve ultra -thin blades are used to make the surface of the flow channel smoother, less loss, energy saving energy, saving energy saving, energy saving energy saving, energy saving energy saving, energy saving energy saving. The efficiency of the pump is higher.
The pump body, pump cover, and impeller use three -dimensional CFD technology to directly shape. The fine cast aluminum film produced by the processing center greatly reduces the phenomenon of mold surface deformation and local vortex. For casting, the material of the parts can be guaranteed, making the size more accurate inner cavity and smoother, the outlet has no resistance and more beautiful shape, and then improves the efficiency of the energy -saving pump.
Pump pump covering cast iron components The general type of precision spraying is used. The precision type is treated with special electrophoresis, which can make the surface smoother, completely covered and using durable surfaces. The pump body and pump cap using electrophoretic treatment can reduce the friction and improve the overall efficiency of the energy -saving pump. It can prevent the effect of corrosion corrosion better due to the pain of paint and unevenness caused by spray paint.
Double -mouth impeller free circuit leakage technology
All the impeller uses a double -in -mouth balance structure, which can reduce the tolerance between the impeller and the pump snail shell, thereby reducing the flow of liquid from the high pressure zone to the low pressure zone, which can make the internal loss less, and then enable the capacity to enable the capacity Consumption is reduced, which is very important for the overall efficiency and performance of the pump.
Analysis of the Specific Reasons Why the Shield Pump Does Not Produce Water
Shield pump is a seal-free pump, in the use of the process will inevitably have some problems, not water is a relatively common problem, before repairing the first to know the causes of the equipment does not produce water.
The first thing to consider is the equipment is blocked by debris inlet pipe leads to the case of no water.
The pump cavity inside the inhalation of debris damage, such as some hard rocks and other blockage of the impeller leads to no suction equipment.
There is another is the shield pump bottom valve into the water is not deep enough to cause the equipment inlet pipe in the inhalation of a large amount of air resulting in the case of no water.
The temperature of the conveyed liquid is too high and the liquid contains a large amount of steam, resulting in gas discharge and cavitation.
Before maintenance, also consider whether the inlet pipe joints due to the long aging of the poor sealing phenomenon, resulting in the equipment in the operation of the inhalation of a large amount of air and no water.
The equipment is not loaded with a sufficient amount of water before starting, so sometimes it seems that the water has overflowed from the bleed hole, but did not turn the pump shaft to completely exhaust the air resulting in air residue in the inlet pipe.
Some users due to the original motor damage on the random with another motor driven, resulting in a small flow, low head, no water problems.
The shielded pump connects the pump and the motor together, the rotor of the motor and the impeller of the pump are fixed on the same shaft, and the rotor and the stator of the motor are separated by using the shielding sleeve, the rotor runs in the medium being conveyed and its power is transmitted to the rotor through the stator magnetic field.
The equipment is well checked before operation and used only after it is determined to be correct. However, it is found that this type of pump cannot idle, why it cannot idle? The main reasons are as follows.
The shielded pump can not idle, because the pump's magnetic cylinder is composed of cooling medium, if idling will lead to magnetic lock.
Most of the bearings of the rotor are made of carbide, lubricated by the medium, but the pump can not be lubricated.
After the equipment is emptied, there is no material to cool the pump, so there is a risk of burning the diaphragm directly.
The core components are the outer magnetic assembly and the inner magnetic assembly. If idle, the components will be demagnetized at high temperatures and the performance of the pump will be greatly reduced.
Taizhou Inwon Technology Co.,ltd is a professional enterprise in the production of water pumps. Located in Daxi Town, Wenling Taizhou City, Zhejiang of China, which is well known as "Hometown of Water Pump".
FAQ
Q: What is a shielding pump?
Q: What are the main benefits of using a shielding pump?
Q: What types of fluids can be handled by shielding pumps?
Q: How do shielding pumps differ from traditional pumps?
Q: What are the common applications of shielding pumps?
Q: What are the different types of shielding pumps?
Q: How does a canned motor pump work?
Q: What is a magnetically driven pump?
Q: How does a shaftless pump work?
Q: What is the difference between a canned motor pump and a magnetically driven pump?
Q: What factors should be considered when selecting a shielding pump?
Q: What are the advantages of using a magnetically driven pump over a traditional pump?
Q: Can shielding pumps handle abrasive fluids?
Q: What is the typical lifespan of a shielding pump?
Q: How do you maintain a shielding pump?
Q: Are shielding pumps energy efficient?
Q: Can shielding pumps be used in hazardous environments?
Q: How do you troubleshoot a malfunctioning shielding pump?
Q: What are the common causes of pump failure in shielding pumps?
Q: How do you select the right size of shielding pump?
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