A method for adjusting the oil return pressure of a hydraulic pump casing

A hydraulic pump housing and hydraulic pump technology, applied in the aviation field, can solve problems such as the system cannot work normally, the return oil temperature of the hydraulic housing cannot be cooled, the system oil temperature rises, etc., so as to protect the normal work and reduce the fuel cooling. to ensure the effect of fuel supply

Active Publication Date: 2015-10-28
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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AI Technical Summary

Problems solved by technology

In this test method, when the flow rate of the system is small, the oil temperature of the return oil of the hydraulic housing cannot be cooled, so that the oil temperature of the entire system rises rapidly, so that the system cannot work normally

Method used

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  • A method for adjusting the oil return pressure of a hydraulic pump casing

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Embodiment Construction

[0012] 1) The hydraulic pump 2 is installed on the output shaft of the engine accessory box through a clamp. When the hydraulic pump rotates, it absorbs oil from the hydraulic oil tank 1, pumps out high-pressure hydraulic oil and returns oil to the casing for cooling and lubricating the hydraulic pump itself;

[0013] 2) The pumped high-pressure hydraulic oil returns to the hydraulic oil tank through the hydraulic load simulation part 3 and the fuel cooling system 5; the hydraulic load simulation part converts the pressure energy of the hydraulic oil into heat energy and consumes it.

[0014] 3) The shell return oil used for the cooling and lubrication of the hydraulic pump itself is connected to the pressure oil port of the electromagnetic reversing valve 4 through a filter;

[0015] 4) Electromagnetic reversing valve 4 is a normally open two-position three-way electromagnetic reversing valve. The pressure oil port of the electromagnetic reversing valve is connected with the o...

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Abstract

The invention belongs to the technical field of aviation, and relates to an engine aerial test hydraulic load simulating device, in particular to a method for adjusting return oil pressure of a hydraulic pump shell. According to the method for adjusting the return oil pressure of the hydraulic pump shell, return oil of the hydraulic pump shell returns to a hydraulic oil tank through different pipelines by powering on and powering off of an electromagnetic directional valve under limited conditions in an engine aerial test, and it is ensured that the return oil pressure of the hydraulic pump shell meets the requirement for work of a hydraulic pump.

Description

technical field [0001] The invention belongs to the field of aviation technology, and relates to a hydraulic load simulation device for an engine air test, in particular to a method for adjusting the oil return pressure of a hydraulic pump casing. Background technique [0002] In the engine hydraulic load test, the pressure of the oil return from the casing of the hydraulic pump is limited to a certain extent. However, the return oil temperature of the hydraulic pump casing is very high, and it should be cooled by the fuel cooler before returning to the hydraulic oil tank. [0003] In the air test of the engine, due to the limited installation space, it is inconvenient to install a separate fuel cooler to cool the casing of the hydraulic pump and return the oil, which also causes waste of the system. [0004] At present, during the air test of the engine, the oil returned from the hydraulic pump casing is directly returned to the hydraulic oil tank, and the hydraulic oil in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B19/00F15B21/04
Inventor 李秋萍
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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