Standard centering device, engine test trolley and standard centering method

Abstract

The invention provides a standard centering device, an engine test trolley and a standard centering method. The standard centering device comprises a first simulative dynamometer, a second simulative dynamometer, a locating retaining frame, a locating connecting plate and a locating bottom plate, wherein the first simulative dynamometer is fixed on the standard centering device through locating pins and bolts and defines a reference height; the second simulative dynamometer is connected with a bottom plate locating pin of the standard centering device through the locating pins and can be dismounted from the standard centering device; a laser shaft alignment instrument is mounted between the first simulative dynamometer and the second simulative dynamometer; the locating retaining frame is used for supporting the standard centering device and locating the standard centering device so that the standard centering device forms an entirety capable of moving as a whole; and the locating connecting plate is connected with the second simulative dynamometer and the locating bottom plate.

Description

technical field [0001] The invention relates to engine development tests, in particular to the coaxiality of the shaft system between the engine and the dynamometer. Background technique [0002] At present, there are various types of engine bench test laboratories in China's general automobile factories, agricultural machinery factories, and engine research institutes. In the early development bench test of the engine, it is believed that many automobile manufacturers and engine manufacturers will encounter various transmission system problems. Analyzing the reasons, most of them are related to the coaxiality of the transmission system. That is, the installation accuracy of the coaxiality between the engine and the dynamometer is not high, the consistency and interchangeability of the engine stand are poor, and the shaft alignment is performed with a ruler or a dial indicator, so the accuracy is generally low. Low, basically in the order of 4mils (1 / 10mm) to 0.4mils (1 / 100...

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Problems solved by technology

[0003] In order to solve the problems of low centering accuracy, poor test efficiency, and frequent failures of the engine and dynamometer shafting (mainly manifested as bearing damage and transmission shaft fracture) in the engine development test, the invention provides an engine development test. In the test, the technical solutions for the centering of the test bench transmission shafting and the precise positioning of the engine test car have been verified by the test, which has solved the problems in the engine development test and greatly improved the quality and quality of the development test process. efficiency

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