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Speed limiting valve real-time flow characteristic testing device and testing method thereof

A real-time flow and characteristic testing technology, applied in fluid pressure actuation devices, fluid pressure actuation system testing, servo motor components, etc., which can solve the problem of high cost

Inactive Publication Date: 2019-06-11
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the counterweight to simulate the load can simulate the actual working conditions, but the cost is high and it is dangerous

Method used

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  • Speed limiting valve real-time flow characteristic testing device and testing method thereof
  • Speed limiting valve real-time flow characteristic testing device and testing method thereof
  • Speed limiting valve real-time flow characteristic testing device and testing method thereof

Examples

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Embodiment 1

[0066] A device for testing real-time flow characteristics of a velocity limiting valve and a testing method thereof. The test device as figure 1 As shown: the oil suction port of the proportional variable pump 2 communicates with the oil tank 1, the oil pressure port of the proportional variable pump 2 communicates with the oil inlet port of the first proportional relief valve 3 and the P port of the electro-hydraulic reversing valve 4, and the electro-hydraulic commutator The A port of the valve 4 is connected with the oil inlet port of the measured speed limiting valve 6 and the pressure gauge 5, and the oil outlet port of the measured speed limiting valve 6 is connected with the oil inlet port of the flow meter 8 and the pressure sensor 7, and the flow meter 8 The oil outlet of the electro-hydraulic reversing valve 4 communicates with the B port of the electro-hydraulic reversing valve 4, the T port of the electro-hydraulic reversing valve 4 communicates with the oil inlet...

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Abstract

The invention relates to a speed limiting valve real-time flow characteristic testing device and a testing method thereof. According to the technical scheme, an oil pressing hole of a proportional variable pump (2) is communicated with an oil inlet of a first proportional overflow valve (3) and a P port of an electro-hydraulic reversing valve (4); an A port of the electro-hydraulic reversing valve(4) is communicated with an inlet of a flowmeter (8) through a tested speed limiting valve (6); a B port of the electro-hydraulic reversing valve (4) is communicated with an outlet of the flowmeter (8); a T port of the electro-hydraulic reversing valve (4) is communicated with an inlet of a second proportional overflow valve (12); a pressure sensor (7), the flowmeter (8), the first proportional overflow valve (3), the second proportional overflow valve (12) and an amplifier (11) are connected with an input / output channel corresponding to a data acquisition card (9); a signal input end of theproportional variable pump (2) is connected with an output channel of the amplifier (11); and the data acquisition card (9) and an auxiliary test software are installed in a computer (10). The speed limiting valve real-time flow characteristic testing device has the advantages of simple system, high testing precision, convenience in installation and high automation degree.

Description

technical field [0001] The invention belongs to the technical field of speed limiting valve testing. In particular, it relates to a real-time flow characteristic test device and a test method for a speed limiting valve. Background technique [0002] The speed limiting valve is one of the key control elements of the hydraulic system, which is used to control the speed of the load drop and reduce the hydraulic shock formed by the lifting hydraulic cylinder at the end of the piston stroke. Real-time flow characteristic test of speed limiting valve is an important means to measure its quality. At present, there are mainly the following schemes for the performance test of the speed limiting valve: [0003] 1. Variable pump scheme. In this scheme, a flow meter is installed behind the speed limiting valve, pressure sensors are installed before and after the speed limiting valve, and a variable displacement pump is used to change the flow of the system. However, a manual overflo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B19/00F15B13/02
Inventor 蒋俊曾良才邓江洪
Owner WUHAN UNIV OF SCI & TECH
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