High-precision detection test stand for leakage in hydraulic cylinder

Abstract

The invention provides a high-precision detection test stand for leakage in a hydraulic cylinder. The high-precision detection test stand comprises a hydraulic cylinder loop, a hydraulic oil heating loop, a cooling water loop and a loading cylinder loop. A piston rod of the loading cylinder is connected with a piston rod of a hydraulic cylinder through a connecting tool. The hydraulic oil heatingloop comprises a heating oil pump, an electromagnetic valve A and a safety valve. An oil outlet of the heating oil pump communicates with an oil inlet of the electromagnetic valve A. An oil outlet ofthe electromagnetic valve A is used for returning oil to a hydraulic oil tank. The safety valve is arranged between the heating oil pump and the electromagnetic valve A. An oil temperature control system consisting of the hydraulic oil heating loop and the cooling water loop is adopted to control the temperature error at + / -2DEG C. A hydraulic oil volume elastic modulus K can be measured at different temperatures. The calibration precision of the hydraulic oil elastic modulus K and the detection precision of leakage in the hydraulic cylinder to be tested are improved. The loading cylinder loopis arranged to adjust the pressure of the hydraulic cylinder, so that the hydraulic oil volume elastic modulus K can be measured at different pressure.

Description

technical field [0001] The invention relates to the technical field of hydraulic testing, in particular to a high-precision detection test bench for leakage in a hydraulic cylinder. Background technique [0002] Use the pressure drop method to detect the leakage in the hydraulic cylinder. Now the commonly used method is to take the empirical value of the elastic modulus K of the hydraulic oil. In actual measurement, the elastic modulus K of the hydraulic oil is affected by temperature, pressure, etc. The existing The detection device has defects such as low detection accuracy, single function, and high production cost. It is impossible to calibrate the bulk modulus K of hydraulic oil at different temperatures and pressures. [0003] To sum up, there is an urgent need for a high-precision detection test bench for leakage in hydraulic cylinders to solve the problems existing in the prior art. Contents of the invention [0004] The purpose of the present invention is to pro...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-precision detection test bench for leakage in hydraulic cylinders to solve problems such as the measurement of elastic modulus K of hydraulic oil.

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