LNG submersible pump

Basic parameter type submersible submersible cryogenic centrifugal pump
Design temperature-℃
Design flow rate/
Design lift
Power supply parameters~ Phase
Motor power
Work Rotation speed r (motor frequency regulation range ~ r)
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Product Features
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The vertical centrifugal pump can generate axial force and radial force during operation, and is reasonably designed The balanced system can effectively reduce the axial force, and the structural design of the guide vane plus vortex chamber makes the radial force so small that it can be ignored, which increases the service life of key components such as shafts and bearings and ensures the long-term safety of the pump. Reliable operation.
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The upright design makes the pump run more stably. The impeller and motor of the pump share a rotating shaft, which reduces connection and calibration problems and extends the operating life of the pump.
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In order to reduce the adverse effects of heat leakage on the pump and motor, the pump jacket adopts high vacuum multi-layer winding insulation form to minimize cold loss. In addition, in order to prevent safety hazards caused by overpressure relief, the safety valve provided with the pump jacket can guide the released gas phase to a centralized high-altitude discharge port, away from the electrical working area.
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The pump body and motor are completely immersed in the low-temperature medium, without sealing and lubrication. This overcomes the leakage problem at the conventional pump shaft seal and avoids the risk caused by trace leakage of flammable and explosive media. Safety hazards, minimizing maintenance requirements. At the same time, due to the excellent cooling effect of the low-temperature liquid, the motor is always running in good working condition, ensuring stable performance of the pump during operation and eliminating the need to regularly replace the motor coolant.
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In order to prevent accelerated wear of the bearings due to insufficient lubrication when the low-temperature liquid fails to completely immerse the pump body during use of the pump, pressure energy is reasonably utilized in the structural design. The supply of driving lubricating fluid can double guarantee the sufficient lubrication of the bearings.
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The motor has variable frequency and speed adjustment, making the pump’s working range wider and suitable for more working conditions.
Advantages compared with similar products
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In view of the easy vaporization characteristics of low-temperature media, a special structural design has been made for the impeller flow channel, combined with the coaxial inducer installed at the inlet to achieve The pump has high anti-cavitation performance.
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In order to ensure the reliable sealing of the power cable wiring lead-out, it can withstand the impact of liquid hydrogen temperature, high pressure and voltage, and can ensure reliable sealing.
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A simple thermal insulation device is installed at the liquid outlet of the pump pool to isolate the liquid cooling capacity at the pump outlet from the large flange cover of the pump pool and reduce frost formation on the large flange cover. At the same time, it simplifies the connection of the pump outlet and facilitates the lifting and maintenance of the pump.