Hydraulic test stand for testing low-temperature static performance of hydraulic valve
A technology of static performance and hydraulic test, applied in fluid pressure actuation system testing, fluid pressure actuation device, fluid pressure actuation system components, etc. Improve cooling efficiency, stable and effective effect of low temperature performance test
Pending Publication Date: 2019-12-31
SHANGHAI HENGTUO HYDRAULIC CONTROL TECH
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Problems solved by technology
[0005] In order to overcome the shortcomings of low oil supply pressure (generally up to 21Mpa) medium temperature and ambient temperature control accuracy of the existing low-temperature test bench, the present invention provides a hydraulic test bench for low-temperature static performance testing of hydraulic valves, which can accurately control And provide hydraulic valve low temperature oil pressure, low temperature ambient temperature test environment, to meet the low temperature performance test requirements of airborne hydraulic valves
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Such as Figure 1 to Figure 3 As shown, the hydraulic test bench for the low temperature static performance test of the hydraulic valve of the present invention consists of two parts: a low temperature hydraulic oil source and a low temperature loading test bench, wherein the low temperature hydraulic oil source consists of a low temperature oil tank assembly, a hydraulic transmission and a control assembly , Electrical control cabinet, low temperature loading test bench is composed of hydraulic control assembly, low temperature environment box, measurement and control system.
[0019] The low-temperature hydraulic oil source stores hydraulic oil through the low-temperature oil tank, cools the oil and maintains it at the required temperature, and outputs the system pressure required for the test through the hydraulic transmission control assembly...
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The invention relates to a hydraulic test stand for testing low-temperature static performance of a hydraulic valve. A low-temperature oil slot assembly is connected to a hydraulic transmission control assembly through a ball valve; a low-temperature hydraulic oil source is composed of a refrigerating system and a low-temperature oil tank; hydraulic oil is stored in the low-temperature oil tank; the refrigerating system cools hydraulic oil and keeps the hydraulic oil within a set temperature range; the low-temperature hydraulic oil source outputs system pressure needed for a test through the hydraulic transmission control assembly, so that a low-temperature medium is provided for a tested part; the hydraulic transmission control assembly is connected with a secondary refrigerating device in the hydraulic control assembly through a high-pressure ball valve, and is connected to a low-temperature oil tank in the low-temperature hydraulic oil source through a low-temperature overflow valve, a one-way valve and a filter; the secondary refrigerating device is connected to a measuring control system; the measuring control system is connected to the low-temperature oil tank through the one-way valve and the filter; the low-temperature environment provides environmental low temperature for the tested part; and the secondary refrigerating device performs secondary refrigeration on the low-temperature medium output by the low-temperature hydraulic oil source, so that the tested part is ensured to be tested under the stable low-temperature medium.
Description
technical field [0001] The invention relates to a testing platform for hydraulic components, in particular to a hydraulic testing platform for low-temperature static performance testing of hydraulic valves. Background technique [0002] The current electro-hydraulic servo valve low-temperature test bench generally freezes the working oil in the fuel tank to the temperature required for the test. Due to the existence of temperature rise, the temperature of the fuel tank must be lower than the test temperature, except that the entire system of the fuel tank is located in a normal temperature environment. The temperature rise of the working oil is relatively large in a test cycle. This test method consumes a lot of energy, and the temperature fluctuation is relatively large during the whole test process, which cannot truly reflect the performance of the electro-hydraulic servo valve at a certain temperature in a low temperature state. Therefore, the existing low-temperature te...
Claims
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Login to View More IPC IPC(8): F15B19/00F15B21/0423
CPCF15B19/00F15B21/0423
Inventor 张宪丁建军程雪飞王思民余萍
Owner SHANGHAI HENGTUO HYDRAULIC CONTROL TECH