Variable hydraulic pump pressure flow characteristics auto-testing method

A technology for automatic testing and flow characteristics, applied in pump testing, machine/engine, liquid variable capacity machinery, etc., can solve problems such as low efficiency and low degree of automation, improve precision and accuracy, and overcome human errors and errors big effect

Inactive Publication Date: 2008-05-14
AIR FORCE UNIV PLA
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Problems solved by technology

This traditional method is not highly automated and inefficient

Method used

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  • Variable hydraulic pump pressure flow characteristics auto-testing method
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  • Variable hydraulic pump pressure flow characteristics auto-testing method

Examples

Experimental program
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Embodiment Construction

[0015] The hydraulic system principle of the variable hydraulic pump pressure flow characteristic test is shown in Figure 1, including: the tested hydraulic pump 1 connected to the pipeline, the check valve 2, the high pressure oil filter 3, the high pressure gauge 4, the high pressure pressure transmitter 5, Proportional throttle valve 6, overflow valve 7, low pressure gauge 8, flow sensor 9, oil return filter 10, hydraulic oil tank 11. Wherein, the relief valve 7 is connected in parallel with the proportional throttle valve 6 .

[0016] The principle block diagram of the test circuit is shown in Figure 2. The flow rate of the pump station and the outlet pressure of the pump station respectively pass through the high-pressure pressure transmitter 5 with a pressure sensor and enter the input terminal of the A / D conversion module of the measurement and control computer (input 4 ~ 20mA or 0 ~ 10V), the output terminal of the D / A conversion module of the measurement and control c...

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Abstract

The invention discloses the automatic testing method of variable hydraulic pump pressure flux characteristic. A proportion throttle valve is arranged in the outlet pipe of a hydraulic pump to be tested for replacing a manual throttle valve; in the testing process, a testing and controlling computer emits instructions to the proportion throttle valve; the opening of the proportion throttle valve is gradually reduced or increased, thus leading the pressure and flux of the outlet of the pump to be changed correspondingly when the testing and controlling computer records the testing data of the pressure and flux at the outlet of the pump; after that, the curve fit is carried out according to the testing data, so as to determine two most important parameters in the hydraulic pump pressure flux characteristic test: zero flux pressure and rate flux. No people are required to take part in the whole testing process, and the testing operation and date proposal are fully and automatically implemented by the testing and monitoring computer. The invention does beneficial try on the aspect of variable hydraulic pump pressure flux characteristic automatic testing technology, which improves the variable hydraulic pump pressure flux characteristic automatic testing level.

Description

technical field [0001] The invention relates to an automatic testing method, in particular to an automatic testing method for the pressure and flow characteristics of a variable hydraulic pump. The method adopts computer automatic testing technology, and a proportional throttle valve is installed in the outlet pipeline of the hydraulic pump to be tested instead of a manual throttle valve. , during the test, the measurement and control computer automatically sends instructions to the proportional throttle valve to gradually reduce or increase the opening of the proportional throttle valve within a specified time period, and at the same time collect and record the test data of the outlet pressure and flow of the hydraulic pump, and according to Curve fitting is performed on test data to determine zero flow pressure and rated flow. Background technique [0002] The variable hydraulic pump is a hydraulic pump whose flow rate is controlled by the pump outlet pressure. The pressur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B51/00
Inventor 苏新兵李小刚王建平曹克强沈燕良李娜周瑞祥刘冰
Owner AIR FORCE UNIV PLA
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