High-precision hydraulic cylinder inner-leakage detection device

Abstract

The invention discloses a high-precision hydraulic cylinder inner-leakage detection device which comprises a hydraulic cylinder inner-leakage detector, a pressure sensor A, a pressure sensor B, a displacement sensor and a hydraulic cylinder control loop, wherein the displacement sensor is connected between the hydraulic cylinder inner leakage detector and a to-be-detected hydraulic cylinder and is used for detecting a position signal of the to-be-detected hydraulic cylinder; the pressure sensor A is connected between the to-be-detected hydraulic cylinder and the hydraulic cylinder control loop and is used for acquiring pressure of one end of the hydraulic cylinder; the pressure sensor A is connected with the hydraulic cylinder inner-leakage detector; the pressure sensor B is connected between the to-be-detected hydraulic cylinder and the hydraulic cylinder control loop and is used for acquiring pressure of the other end of the hydraulic cylinder; the pressure sensor B is connected with the hydraulic cylinder inner-leakage detector. The high-precision hydraulic cylinder inner-leakage detection device disclosed by the invention can meet delivery test or various environments of use sites, is simple to operate, and needs no other hydraulic auxiliary loop in the detection process.

Description

technical field [0001] The invention belongs to the technical field of hydraulic pressure and discloses a high-precision hydraulic cylinder internal leakage detection device, which can be used for quantitative detection and analysis of internal leakage of hydraulic cylinders installed on-line or tested on a test bench. Background technique [0002] As a quantitative indicator in the national and industry standards of hydraulic cylinders, internal leakage is an effective evidence used to judge whether the hydraulic cylinder meets the requirements when it leaves the factory; in addition, it is more often caused by wear and assembly during on-site online use. Leakage failures in hydraulic cylinders require qualitative analysis and quantitative indicators to determine whether hydraulic cylinders need to be replaced and repaired. Since the test of the current test bench needs to be carried out by adding many other hydraulic circuits, and most of them adopt the way of opening the ...

AI Technical Summary

Problems solved by technology

Since the test of the current test bench needs to be carried out by adding many other hydraulic circuits, and most of them adopt the method of opening the cavity to discharge oil for testing, this method is cumbersome and wastes hydraulic oil and pollutes the environment

For on-site hydraulic cylinder detection, due to limited conditions, it is more dependent on personal experience or simple pressure gauges for judgment, it is difficult to detect quantitative data, and it is difficult to obtain convincing internal leakage evidence

Since the internal leakage of the hydraulic cylinder is related to the pressure difference between the two ends of the hydraulic cylinder, there is currently no instrument and device on the market that can directly measure whether the internal leakage of the hydraulic cylinder meets the national standard requirements

In addition, due to the internal processing of the hydraulic cylinder, the leakage of the hydraulic cylinder at different positions will be inconsistent. At present, there is no instrument or device that can measure the leakage of each point of the hydraulic cylinder's full stroke.

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