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Cam Tappet Friction Coefficient Measuring Device

A technology of friction coefficient and cam, which is applied in the field of cam tappet friction coefficient measuring device, can solve the problems of no direct measurement of cam and tappet friction, friction coefficient, and no unified test standard, etc., and achieves wide application range, simple structure, The effect of easy wiring

Active Publication Date: 2015-12-02
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no direct measurement method for the friction force and friction coefficient of the cam and tappet, and there is no uniform test standard

Method used

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  • Cam Tappet Friction Coefficient Measuring Device
  • Cam Tappet Friction Coefficient Measuring Device
  • Cam Tappet Friction Coefficient Measuring Device

Examples

Experimental program
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Embodiment Construction

[0018] The test device of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 and figure 2 As shown, the slider guide rail 5 is fixed on the test bench 1; the four pressure sensors 7 are adhered to the pressure sensor guide block 8 and installed on the side of the slider guide rail 5; the tappet slider 4 and the tappet 3 are integrated , one end of which cooperates with the slider guide rail 5, and uses four rollers to contact the pressure sensor guide block 8; the resistance strain gauge 9 is attached to the side of the push rod 6. The push rod connects the rocker arm 10 and the valve assembly 11 .

[0020] When the cam 2 rotates, the tappet 3 and the tappet slider 4 move periodically up and down along the slider guide rail 5 . The lower surface of the slider slides relative to the cam, and due to friction, the tappet slider presses to the left toward the guide block 8 of the pressure sensor; the p...

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Abstract

The invention discloses a friction coefficient measuring device of a cam tappet. A slide block guide rail is fixedly arranged on a test bed, and four pressure sensors are attached to a pressure sensor guide block and are installed on the side face of the slide block guide rail; a tappet slide block and a tappet are integrated, one end of the integrated body is matched with the slide block guide rail, and four rollers are adopted to be in contact with the pressure sensor guide block; a resistance strain gage is attached to the side face of a push rod; the push rod is connected with a rocker arm and a valve assembly. When a cam rotates, the tappet and the tappet slide block move cyclically up and down along the slide block guide rail. The lower surface of the slide block slides relative to the cam. Due to effect of the force of friction, the tappet slide block leftward pressures the pressure sensor guide block. The pressure sensor records data of the acting force on the slide block by the slide block guide rail in real time, so that the frictional force of the camp tappet is obtained through correction. The device disclosed by the invention is simple in structure and easy in arrangement of wires, and adopts electronic signal experiment equipment, so that the device is high in precision and less in measuring error.

Description

technical field [0001] The invention belongs to the technical field of engine detection, and relates to a cam tappet friction coefficient measuring device, which is a test device for measuring the friction coefficient of a cam and a tappet friction pair by using a resistance strain gauge and a strain tube type pressure sensor. Background technique [0002] The cam mechanism is widely used in mechanical transmission systems because of its simple and compact structure, strong designability, and the ability to obtain any periodic motion of the follower. The friction pair of the engine cam and the tappet is in high pair contact, and usually works under high temperature, high speed and variable pressure, and wear is the main form of failure. Friction force and friction coefficient can reflect the contact state of the friction pair and the energy loss of the mechanism, and can also indirectly evaluate the wear state, so its measurement is of great significance. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/02
Inventor 刘忠民余旭康唐龙鑫吴军傅瑜杭
Owner HANGZHOU DIANZI UNIV
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