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Air cylinder friction force testing device and method

A testing device and friction technology, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve the problems affecting the accuracy of friction force, the influence of friction force, the inability of the precision pressure reducing valve to respond in time, etc., and achieve good results. Universal, high-precision effect

Active Publication Date: 2020-02-11
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large proportion of the gas pressure acting on the piston included in the resultant force, its error will seriously affect the accuracy of the friction force
In addition, during the movement of the cylinder, due to the volume change of the two chambers of the cylinder, the precision pressure reducing valve cannot respond in time, and the air pressure in each chamber will also change, so the friction force will be affected accordingly

Method used

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  • Air cylinder friction force testing device and method
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  • Air cylinder friction force testing device and method

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0049] like figure 1 As shown, the cylinder friction detection device of the present invention includes a mounting platform, a motion transmission component, a connecting assembly 5, a measured part, a supporting component and a cylinder pressure control system. Both the motion transmission part and the supporting part are installed on the installation platform.

[0050] like figure 2 As shown, the motion transmission components include a servo motor 10 and a ball screw mechanism 6 . The end cap 12 of the ball screw mechanism 6 is provided with four threaded holes; the flange 11 is provided with four countersunk holes and four threaded holes, and the hexagon socket bolts pass through the countersunk holes on the flange 11 The hole is screwed and fastened to the end co...

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Abstract

The invention provides an air cylinder friction force testing device and method. The air cylinder friction force testing device comprises an installation platform, a motion transmission part, a connecting assembly, a tested part, a supporting part and an air cylinder pressure control system. Three air cylinders with the same piston acting areas of rod cavities and rodless cavities are selected; the two air cylinders are oppositely arranged; and the rod cavities and rodless cavities of the two air cylinders are communicated with each other and externally connected with an air tank. With a normally-closed quick switch valve, the pressure of the air tank is made to be a constant value based on a corresponding control algorithm; pressures applied to the pistons of the two cylinders by compressed air can be cancelled mutually; and a force measured directly by a tension and pressure sensor is the sum of friction forces of two cylinders. On the basis of the same method, the sums of cylinder friction forces under relative installation of two of the three cylinders are measured three times. And then a ternary linear equation set is solved to calculate friction forces of all cylinders. The air cylinder friction force testing device and method have high measurement precision and universality.

Description

technical field [0001] The invention relates to the field of cylinder friction test, in particular to a cylinder friction test device and method. Background technique [0002] The pneumatic system uses air as the working medium, which has many advantages such as low pollution, low cost, simple structure and good adaptability to the working environment. Therefore, pneumatic technology has been rapidly developed and widely used in contemporary times. The cylinder is the most commonly used actuator in the pneumatic system. The friction force of the cylinder is an important index to evaluate the performance of the cylinder. The friction force of the cylinder will directly affect the positioning accuracy, speed control accuracy and stability of the motion process of the cylinder. [0003] In order to accurately measure the friction force of the cylinder under working conditions, people have designed various experimental devices for testing the friction force of the cylinder. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
CPCG01L5/0028
Inventor 钱鹏飞吴佳伟顾振业夏鹏邹能祥刘阳张舒婷张兵
Owner JIANGSU UNIV
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