Disengagement test system and method for a pump

A seal disengagement test system for a liquid oxygen turbopump of an engine, comprising:

• a console;
• a nitrogen storage device;
• a sensor;
• a displacement monitoring device;
• and
• an automatic control unit;
• wherein the console comprises a pneumatic booster pump, a piping module and a plurality of control valves;
• the pneumatic booster pump is configured to charge nitrogen gas from a nitrogen gas source into the nitrogen storage device for storage;
• the piping module is configured to connect the nitrogen storage device to a pump chamber of a to-be-tested liquid oxygen turbopump to form a plurality of testing channels, wherein the plurality of testing channels comprise an air tightness testing channel and a disengagement testing channel;
• the plurality of control valves are disposed on the plurality of testing channels, respectively;
• and
• the plurality of control valves comprise a first pressure-regulating valve, a second pressure-regulating valve and a pressure relief valve;
• the first pressure-regulating valve is configured to adjust a pressurization rate during an air tightness test, and the second pressure-regulating valve is configured to control a pressure and a pressurization rate during a disengagement test;
• and the pressure relief valve is configured to maintain a pressure of the seal disengagement test system not higher than a safety pressure threshold;
• the nitrogen storage device is configured to store the nitrogen gas;
• the sensor is configured to acquire a sealing pressure of the to-be-tested liquid oxygen turbopump;
• the displacement monitoring device is configured to monitor a displacement of a seal in the to-be-tested liquid oxygen turbopump during a seal disengagement process;
• the automatic control unit is configured to control opening and closing of the seal and to monitor a pressure in the pump chamber of the to-be-tested liquid oxygen turbopump;
• wherein the automatic control unit is configured to:
• control the pneumatic booster pump to charge the nitrogen gas from the nitrogen gas source into the nitrogen storage device;
• control the first pressure-regulating valve to perform the air tightness test on the to-be-tested liquid oxygen turbopump and control the second pressure-regulating valve to perform a seal disengagement test on the to-be-tested liquid oxygen turbopump;
• after completion of the air tightness test and the seal disengagement test, plot a seal disengagement curve of the to-be-tested liquid oxygen turbopump during the seal disengagement test based on the sealing pressure acquired by the sensor and the displacement acquired by the displacement monitoring device, thereby enabling automatic testing, automatic data acquisition, and automatic curve plotting for the seal disengagement test of the to-be-tested liquid oxygen turbopump.