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
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[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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