Method and device for measuring the contact surface of rotating shaft lip-shaped sealing member

Abstract

The invention relates to a method and a device for measuring the contact surface of a rotary shaft lip-shaped sealing member, and belongs to the technical field of mechanical testing. In the measuringdevice, a sealing member and a glass shaft are tightly installed with an interference fit, and the outer surface of the transparent glass shaft has a length scale; a plane mirror is fixed inside theglass shaft and at an angle of 45 DEG to the center line of the glass shaft; an industrial camera is mounted at the end of the glass shaft, and the center line of the industrial camera coincides withthe center line of the glass shaft; alight source is mounted in the circumferential direction of the industrial camera, and parallel to the center line of the glass shaft. During the measurement, theplane mirror reflects an image of the contact surface of the sealing member to the horizontal direction, the image information is received through the industrial camera, the contact surface is evaluated by using the light intensity difference between the contact surface and the non-contact surface, and then the contact area is calculated. The device and the method of the invention are relatively simple, have wide applicability and strong operability, can quickly and accurately obtain the sealing contact result, and provide sufficient experimental basis for the design and production inspectionof the rotating shaft lip-shaped sealing member.

Description

technical field [0001] The invention relates to a method and a device for measuring the contact surface of a lip seal of a rotating shaft, belonging to the technical field of mechanical testing. Background technique [0002] Rotary shaft lip seals are widely used in various mechanical fields, such as automobile engine crankshafts, camshafts, hub shafts, etc. The main working principle is to use the high elasticity of rubber and plastic materials to make the seals and shafts Close contact creates a sealing effect. In order to achieve a good sealing effect, the seal needs to have a sufficient contact surface with the shaft, and the contact surface cannot have a continuous gap. [0003] During the research and development process of the rotary shaft lip seal, it is necessary to quickly test the static sealing performance of the rotary shaft lip seal, usually through a bench test. However, since the sealing surface of the rotating shaft lip seal is usually not directly observe...

AI Technical Summary

Problems solved by technology

This method judges the contact stress through the color depth and has a large error, which is easily affected by the environment and the subjective feelings of the operator.

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