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Low-pressure large-flow overflow valve test system and test method thereof

A test system and high-flow technology, which is applied in the field of low-pressure and large-flow relief valve test systems, can solve problems such as the inability to meet the test requirements of low-pressure and large-flow relief valves, and achieve the effects of stable operation, accurate testing, and precise measurement and testing

Pending Publication Date: 2022-03-25
HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a low-pressure and high-flow relief valve test system and its test method, which solves the technical problem that the existing test bench for the relief valve cannot meet the test requirements of the low-pressure and large-flow relief valve

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  • Low-pressure large-flow overflow valve test system and test method thereof

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Effect test

Embodiment 1

[0042] Embodiment 1, a kind of low-pressure high-flow relief valve test system, such as figure 1 As shown, it includes a circulation circuit and a signal acquisition control module connected to the low-pressure large-flow relief valve 15. The circulation circuit includes a main circuit oil pump unit, a test unit, an oil return unit, and a temperature control module 20 connected in sequence. The oil pump unit and the oil return unit are connected through an oil tank, and the temperature control module 20 is arranged in the oil tank. The signal acquisition control module includes a data acquisition device 32, a control device 33 and an industrial computer 31, and the three form a feedback control loop.

[0043] The main road pump oil unit includes a main road hydraulic pump driven by a main road variable frequency motor 2, which is provided with a triple flow valve 18, a main road pressure gauge 17, and a main road overflow valve 19 in parallel with the main road hydraulic pump....

Embodiment 2

[0049] Embodiment 2, a test method of a low-pressure and large-flow relief valve test system, including the pressure regulation range and pressure stability test of the low-pressure and large-flow relief valve 15, the internal leakage test of the low-pressure and large-flow relief valve 15, the low-pressure Pressure loss test of large flow relief valve 15.

[0050] 1.1 Test environment

[0051] Except for the environmental adaptability test, the rest of the tests were carried out under the conditions of laboratory ambient temperature, humidity and air pressure. The environmental adaptability test is carried out according to the corresponding part in GJB150A-2009 "Military Equipment Laboratory Environmental Test Methods".

[0052] 1.2 Test medium

[0053] Test medium: CD40 diesel engine oil (GB-11122-2006), 4450 aviation gear oil (GJB561-1988).

[0054] Test medium temperature: system oil temperature 55±5℃.

[0055] Pollution degree of the test medium: should not be higher ...

Embodiment 3

[0063] Embodiment 3, a test method of a low-pressure and high-flow relief valve test system, including the steady-state pressure-flow characteristic test of the low-pressure and high-flow relief valve 15, during the test, open the large-flow pipeline and close the small-flow pipeline, Adjust the main road relief valve 19 to full tightness, adjust the low pressure and large flow relief valve 15 to the upper limit of pressure regulation, control the speed of the main road variable frequency motor 2 through the control device 33, and monitor the flowmeter on the large flow channel at the same time, Make the flow rate of the test system a certain value in the range of 100-300 L / min, preferably 200 L / min, and carry out the following tests:

[0064] a. Adjust the main relief valve 19 so that the system pressure gradually drops to the closing rate pressure of the low pressure and large flow relief valve 15, close the large flow pipeline, open the small flow pipeline at the same time, ...

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Abstract

The invention discloses a low-pressure large-flow overflow valve test system and a test method thereof.The test system comprises a circulation loop and a signal acquisition control module which are connected with a low-pressure large-flow overflow valve, and the circulation loop comprises a main path oil pumping unit, a test unit, an oil return unit and a temperature control module which are sequentially connected; a transient response module is arranged in parallel with the test unit, the transient response module comprises a lifting valve, and the control end of the lifting valve is connected with a bypass oil pumping unit through an electromagnetic reversing valve. The test method comprises a pressure regulating range and pressure stability test, an internal leakage amount test, a pressure loss test, a steady-state pressure-flow characteristic test, a transient response test and a pressure regulating-torque regulating test of the low-pressure large-flow overflow valve. Optimization of the structure and the method is achieved, operation is stable and reliable, the device can be used for predelivery tests and type tests, and it can be guaranteed that performance tests of low-pressure large-flow overflow valves are accurate and correct.

Description

technical field [0001] The invention relates to the technical field of an overflow valve test system, in particular to a low-pressure, high-flow overflow valve test system and a test method thereof. Background technique [0002] The overflow valve is used as a constant pressure valve and a safety valve in the hydraulic system to protect the hydraulic system. Therefore, the performance of the overflow valve directly affects the working performance and reliability of the entire hydraulic system. Low-pressure and high-flow relief valves are mainly used in ship control hydraulic systems, with a pressure regulation range of 4Bar to 12Bar, while the pressure range of the direct-acting relief valve uniformly set in the current relief valve standard JB / T10374-2013 is 0 to 12Bar. 25Bar, the pressure of the existing test bench is relatively high for the overflow valve produced, and the measurement is relatively inaccurate at low pressure. Therefore, in order to more accurately measur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/003G01D21/02G05D27/02
CPCG01M13/003G01D21/02G05D27/02
Inventor 胡飞强郭克伟李志鹏陈正立国宁田捍卫张万年沈博胡兆华夏红升
Owner HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH
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