Method for determining test conditions of rotation fatigue of automobile chain

A fatigue test and determination method technology, applied in the field of chain transmission, can solve the problems of long test period, chain fatigue strength distortion, etc., and achieve the effect of shortening the time of exploration

Active Publication Date: 2016-12-14
QINGDAO CHOHO IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unreasonable sprocket speed setting often leads to too long test period or distortion of the obtained chain fatigue strength

Method used

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  • Method for determining test conditions of rotation fatigue of automobile chain
  • Method for determining test conditions of rotation fatigue of automobile chain
  • Method for determining test conditions of rotation fatigue of automobile chain

Examples

Experimental program
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Embodiment Construction

[0026] The method for testing the rotational fatigue performance provided by the present invention will be described in detail below in conjunction with an implementation case.

[0027] The idle speed of the engine is 800r / min, and the maximum speed is 7000r / min. After the noise test, the test speed of the chain is determined to be 800r / min, 1300r / min, 1800r / min, 2300r / min, 2800r / min, 3300r / min, 3800r / min , 4300r / min, 4800r / min, 5300r / min, 5800r / min, 6300r / min, 6800r / min, 7000r / min, the actual noise value under the load of 1.960kN (eg figure 1 ). The noise is the largest at 4800r / min, which is used as the rotation speed for the rotary fatigue test.

[0028] The tensile strength of the chain is determined to be Q=14.7kN through a tensile test, and the load step is determined to be 1.5%Q.

[0029] According to the present invention, the test loads are respectively 1.76kN, 2.20kN, 2.42kN, 2.64kN, 2.86kN...

[0030] The test results are shown in Table 1.

[0031] Table 1 Resul...

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Abstract

The invention relates to a method for determining the test conditions of rotation fatigue of an automobile chain, and the method comprises the steps: determining the tensile strength Q of the chain through the tensile test of the chain; determining the actual noise value of the chain during different rotating speeds and the rotating speed during the largest noise through the noise testing of the chain; determining a test load and a rotating speed according to the tensile strength Q and the rotating speed during the largest noise, and finally determining the fatigue limit of the automobile chain under a severe work condition. Through the tensile test and noise test of the chain, the method determines a load for the testing of the rotation fatigue, enables the rotating speed during the largest noise to serve as the test rotating speed, reduces the number of ineffective tests, and quickly determines the fatigue strength of the automobile chain under the severe work condition.

Description

technical field [0001] The patent of the present invention relates to the technical field of chain transmission, in particular to a method for determining the test conditions for rotation fatigue of automobile chains. Background technique [0002] At present, with the development of reliability technology, among the three quality indicators for evaluating automobile engines—technical indicators, economic indicators and reliability indicators, reliability indicators occupy an increasingly important position. More and more new automobile engines use chains as the key transmission components of their timing systems and oil pump systems. As a key factor of reliability index, the level of fatigue characteristics of the automobile chain directly affects the performance of the engine. [0003] Chain manufacturers and engine main engine manufacturers mainly evaluate the multi-impact fatigue performance of automobile chains through rotary fatigue testing machines, engine assembly te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02
CPCG01M13/023G01M13/027
Inventor 金玉谟付振明高配彬刘营王付明
Owner QINGDAO CHOHO IND CO LTD
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