System and method for testing sealing friction force and viscous friction coefficients of hydraulic linear moving element

A technology of linear motion and friction coefficient, which is applied in fluid pressure actuation system testing, fluid pressure actuation devices, mechanical equipment, etc., can solve problems such as viscous friction force and viscous friction coefficient size test, and achieve a simple and easy solution Effect

Inactive Publication Date: 2018-06-29
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] In order to solve the problem of testing the viscous friction force and viscous friction coefficient of high water-based hydraulic component...

Method used

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  • System and method for testing sealing friction force and viscous friction coefficients of hydraulic linear moving element

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Embodiment Construction

[0026] Such as figure 1 As shown, a hydraulic linear motion element sealing force and viscous friction coefficient testing system includes a driving part, a connecting part and a measured part. The driving part includes a filter I1, a driving pump 2, an overflow valve I3, and an electro-hydraulic proportional directional valve 4 , hydraulic control check valve I5, hydraulic control check valve II6, displacement sensor 7 and drive cylinder 8, filter I1 is connected with drive pump 2, drive pump 2 is connected with P port of electro-hydraulic proportional directional valve 4, electro-hydraulic proportional The T port of the directional valve 4 is connected to the oil tank, and the overflow valve I3 is connected in parallel between the P port and the T port. The A port and the B port of the electro-hydraulic proportional directional valve 4 pass through the hydraulic control check valve I5 and hydraulic control check valve respectively II6 is connected with the driving oil cylind...

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Abstract

The invention belongs to the technical field of hydraulic testing, and particularly relates to a system and method for testing sealing friction force and viscous friction coefficients of a hydraulic linear moving element. The testing problems of viscous friction force and viscous friction coefficients of a high-water-based hydraulic element are solved. The system for testing the testing sealing friction force and the viscous friction coefficients of the hydraulic linear moving element is characterized in that a driving part comprises a filter I, a driving pump, an overflow valve I, an electro-hydraulic proportional directional valve, a hydraulic control one-way valve I, a hydraulic control one-way valve II, a displacement sensor and a driving oil cylinder, and a tested part comprises a pressure gauge I, an energy accumulator I, a stop valve I, a stop valve II, an energy accumulator II, a pressure gauge II, a tested cylinder, a shifting piece, a travel switch I, a travel switch II, a one-way valve I, a one-way valve II, an electro-hydraulic reversing valve, an overflow valve II, a liquid filling pump and a filter II. According to the system and method for testing the testing sealingfriction force and the viscous friction coefficients of the hydraulic linear moving element, the sealing friction resistance and the friction coefficients under different differential pressure and movement speeds can be measured.

Description

technical field [0001] The invention belongs to the technical field of hydraulic testing, in particular to a testing system and method for sealing force and viscous friction coefficient of a hydraulic linear motion element. Background technique [0002] At present, the hydraulic system of coal mine hydraulic supports widely uses high water-based emulsion as the transmission medium (95-97% water + 3-5% emulsified oil mixed), the viscosity of the medium is low, and the hydraulic system and hydraulic components are easy to leak inside, so high water-based hydraulic components O-ring seals are widely used, especially in hydraulic support hydraulic cylinders and hydraulic valves. When mathematically modeling a hydraulic cylinder or hydraulic valve, it is necessary to consider the axial friction force on the spool or hydraulic cylinder. The traditional oil pressure valve mainly relies on the gap seal, which suffers from small viscous damping force, but the viscous friction force ...

Claims

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Application Information

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IPC IPC(8): F15B19/00
CPCF15B19/00
Inventor 廖瑶瑶廉自生袁红兵赵澜赵瑞豪
Owner TAIYUAN UNIV OF TECH
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