Hydraulic cylinder internal leakage testing device and method
A technology of testing device and testing method, which is applied in the direction of fluid pressure actuating device, fluid pressure actuating system testing, mechanical equipment, etc., can solve the problems such as the inability to measure piston leakage, achieve accurate and effective measurement results, accurately measure, eliminate The effect on the measured impact
Active Publication Date: 2016-02-03
湖南省产商品质量监督检验研究院
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Problems solved by technology
In addition to measuring the leakage in the hydraulic cylinder when the piston of the hydraulic cylinder under test moves to both ends, this method cannot measure the leakage in the hydraulic cylinder when the piston is in other positions
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[0023] figure 1 It shows an embodiment of a hydraulic cylinder internal leakage testing device of the present invention, the device includes a base 1 and a loading hydraulic cylinder 2 for loading the hydraulic cylinder 5 to be tested, the loading hydraulic cylinder 2 is installed on the base 1, The loading hydraulic cylinder 2 is connected with an oil return overflow valve 3 , and the loading hydraulic cylinder 2 is equipped with a displacement sensor 4 for measuring the displacement of the piston of the loading hydraulic cylinder 2 .
[0024] The leakage test device in the hydraulic cylinder of the present invention can stop the piston of the hydraulic cylinder 5 to be tested at any position in the cylinder body by loading the hydraulic cylinder 2 and the oil return overflow valve 3. During the measurement, the hydraulic cylinder 2 is loaded The internal leakage of itself will cause the pistons of the loading hydraulic cylinder 2 and the hydraulic cylinder 5 to be tested to ...
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The invention provides a hydraulic cylinder internal leakage testing device and method. The device comprises a loading hydraulic cylinder used for loading a hydraulic cylinder to be tested. The loading hydraulic cylinder is connected with an oil return overflow valve and provided with a displacement sensor used for measuring the piston displacement of the loading hydraulic cylinder. The method includes the steps that firstly, installation and adjustment are performed, wherein the hydraulic cylinder to be tested is fixedly connected with a piston rod of the loading hydraulic cylinder, so that the hydraulic cylinder to be tested is stopped in the test position, and the loading force of the loading hydraulic cylinder is made to be larger than the output force of the hydraulic cylinder to be tested by adjustment of the oil return overflow valve of the loading hydraulic cylinder; secondly, measurement is performed, wherein high-pressure oil is injected in one cavity of the hydraulic cylinder to be tested, an oil port of the other cavity is opened and connected to a measuring glass, and loading time, the total amount of oil overflowing from the oil port and the piston displacement of the loading hydraulic cylinder are measured; and thirdly, calculation is performed, wherein the equation that the internal leakage amount=(L-D*S) / T is satisfied, L is the total amount of oil overflowing from the oil port, D is the piston displacement of the loading hydraulic cylinder, S is the cross sectional area of inner cavities of a cylinder body of the hydraulic cylinder to be tested, and T is the loading time.
Description
technical field [0001] The invention mainly relates to the technical field of hydraulic component testing machinery, in particular to a hydraulic cylinder internal leakage testing device and method. Background technique [0002] In the existing testing technology for internal leakage of hydraulic cylinders, the test is usually performed after the piston of the hydraulic cylinder under test moves to both ends and stops. Measuring cups and stopwatches measure the amount of oil that escapes from the port over a period of time. In addition to measuring the leakage in the hydraulic cylinder when the piston of the hydraulic cylinder under test moves to both ends, this method cannot measure the leakage in the hydraulic cylinder when the piston is in other positions. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a hydraulic cylinder that can accurately measure the interna...
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IPC IPC(8): F15B19/00
Inventor 李志丰胡思玉郭学东陈欣罗书径
Owner 湖南省产商品质量监督检验研究院