A vertical submersible motor performance test platform

Abstract

The invention provides a vertical submersed motor performance test platform, which comprises a supporting vertical column, a load motor mounting plate, a tester mounting plate, a tested motor mounting plate and a liquid nitrogen pool, wherein the supporting vertical column is fixed at one side of the liquid nitrogen pool; and the load motor mounting plate, the tester mounting plate and the tested motor mounting plate are fixed on the supporting vertical column sequentially from top to bottom. The vertical submersed motor performance test platform has the beneficial effects that defects of poor flexibility, low accuracy, serious resource waste, poor safety and the like existing in the traditional test method can be effectively overcome.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a performance testing platform of a vertical submersible motor. Background technique [0002] As a clean energy, liquefied natural gas (LNG) has been widely used in many fields. The transportation of LNG usually adopts cryogenic submersible pump, and the motors used in it are all immersed in LNG liquid (-161°C) to work. As the core component of the LNG pump, the submersible motor directly affects the safety of LNG transportation. Since the bearings of the submersible motor are directly lubricated by LNG, the performance test of the motor must be carried out in LNG liquid. [0003] Usually, due to the flammability of LNG, in order to ensure safety, the performance test of the submersible motor is carried out in liquid nitrogen (-196°C). First, the submersible pump is installed in the liquid nitrogen delivery pipeline, and the output power of the motor is obtained indirectly by...

AI Technical Summary

Problems solved by technology

[0004] 1) This test method requires that the motor must run with an impeller, and the load of the impeller changes nonlinearly with the motor speed, and the working point of the motor cannot be adjusted arbitrarily, and the flexibility is poor;

[0005] 2) It is difficult to accurately measure the liquid flow and lift, so the motor power is estimated from this, and the error is relatively large;

[0006] 3) The calculated power efficiency is the total power of the motor with impeller, which cannot accurately evaluate the performance of the motor

The main disadvantage of this method is that liquid nitrogen leakage is easy to occur between the motor shaft and the liquid nitrogen barrel, resulting in waste of resources, and it is easy to cause low temperature frostbite, which has potential safety hazards

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