Method for measuring accuracy of position of gas distribution roller

A measurement method and accuracy technology, which is applied in the field of diesel engine detection of the installation position accuracy of the valve train roller, which can solve the problems of cam and roller contact state deviation, failure, roller wear, etc., and achieve the effect of clear indentation

Inactive Publication Date: 2017-05-10
CHINA NORTH ENGINE INST TIANJIN
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Problems solved by technology

[0004] During the actual assembly of the diesel engine, due to the processing error and installation error of the parts, the contact state between the cam and the roller is deviated. When the diesel engine is working, because the actual contact stress of the contact pair is greater than the allowable allowable stress, abnormal wear of the roller often occurs, and even cause serious failure

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  • Method for measuring accuracy of position of gas distribution roller

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Embodiment Construction

[0027] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...

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Abstract

The invention provides a method for measuring the accuracy of the position of a gas distribution roller, and the method comprises the following steps: (1), placing a pressure-sensitive paper scrip at one side of a gap of a contact part of a cam of a cam shaft and a rocking roller, continuously rotating the cam shaft, and enabling the pressure-sensitive paper scrip to pass through the gap of the contact part of the cam of the cam shaft and the rocking roller; (2), observing the impression of the pressure-sensitive paper scrip, and judging whether the rocking roller is installed in place or not. Compared with a color painting inspection method, the method provided by the invention is advantageous in that the impression is clear and the assembled parts are not polluted. The method can give a contact stress value on an instrument according to the impression.

Description

technical field [0001] The invention belongs to the technical field of product design and manufacture of internal combustion engines, and in particular relates to a method for detecting the installation position accuracy of rollers of a gas distribution mechanism of a diesel engine. Background technique [0002] There are two typical structural types of overhead camshaft valve trains for diesel engines. One is that the camshaft cam directly drives the pressure bridge or the guide cylinder to open the valve, and the other is that the camshaft cam directly drives the rocker arm with the roller to open the valve. In the first case, the accuracy of the installation position of the pressure bridge or guide cylinder is not high, while in the second case, the accuracy of the installation position of the roller rocker arm is relatively high. The reason is that in the first case, the cam acts on the plane of the pressure bridge or the guide cylinder. Because the plane contact area o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/00
CPCG01B5/00
Inventor 郭昌明姚亮宇王艳丽强智臻曾壮钱志高
Owner CHINA NORTH ENGINE INST TIANJIN
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