Mechanical seal test device for nuclear main pump

Abstract

The invention relates to a mechanical seal test device for a nuclear main pump, which is characterized by adopting a vertical structure of bottom transmission, which is driven by a motor; a speed-torque sensor is connected between a motor shaft and a main shaft through a flexible coupling; the main shaft is supported by a lower support and an upper support which are installed in an upper stand; the main shaft extends upward, and the extending part of the main shaft is sleeved with a testing shaft sleeve for installing a bench seal and a mechanical seal used in the tested nuclear main pump; thebench seal is arranged at the bottom of a lower seal cavity, and the mechanical seal for the tested nuclear main pump is arranged at the top of an upper cavity; the testing shaft sleeve is replaceable; a flow guiding sleeve is arranged in the lower seal cavity; a long tube throttling cooler and a back pressure valve are arranged at the position of the seal liquid outlet of the lower seal cavity;and an auxiliary support is matched at the top end of the main shaft. The mechanical seal test device can simulate hydrostatic mechanical seal tests for the nuclear main pump, can simulate hydrodynamic mechanical seal tests for the nuclear main pump and can simulate hydrostatic and hydrodynamic combined type mechanical seal tests for the nuclear main pump.

Description

technical field

[0001] The invention relates to a mechanical seal test device for a nuclear main pump, and more specifically relates to a device for performing a mechanical seal performance test by simulating the working conditions of the nuclear power reactor coolant pump shaft seal. Background technique

[0002] Mechanical seal is an indispensable component in fluid rotating machinery, its quality and performance directly affect and determine the working performance of the main engine. Since the mechanical seal mechanism involves many disciplines such as tribology, material science, fluid mechanics, solid mechanics, heat transfer, lubrication theory, etc., a complete design theory has not yet been formed, and many data are obtained by experiments. Therefore, the test technology of mechanical seal is very important.

[0003] The mechanical seal for the nuclear main pump is used to control the leakage of the reactor coolant along the pump shaft. It is a key component of the...

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