Turbocharger bearing body structure with integral ball bearing

Abstract

The invention discloses a turbocharger bearing body structure with an integral ball bearing. The turbocharger bearing body structure comprises a bearing body, the integral ball bearing, a positioning pin and an oil inlet bolt; the integral ball bearing is arranged in a bearing hole of the bearing body; the upper end of the positioning pin is arranged in a pin hole A of the bearing body; the lower end of the positioning pin is inserted into a pin hole B of an outer ring of the integral ball bearing so as to fixedly connect the outer ring of the integral ball bearing with the bearing body; the lower end of the oil inlet bolt is connected to an inner threaded hole of the bearing body in a threaded mode; and the upper end of the oil inlet bolt is located outside the bearing body. Compared with the prior art which adopts the structure of two floating bearings, the turbocharger bearing body structure has the advantages that only one single integral ball bearing is adopted in the inner hole of the bearing body, and therefore the structure can be simpler, and the assembly can be more convenient; and an annular oil storage cavity is formed among the lower end surface of the oil inlet bolt, the outer wall of the positioning pin and the hole wall of a stepped hole, and therefore the problem that lubricating oil supply lags when an engine is started can be solved, and dry friction of the integral ball bearing in the initial rotation process can be avoided.

Description

technical field [0001] The invention relates to a bearing body structure of a turbocharger, in particular to a bearing body structure of a turbocharger with integral ball bearings. Background technique [0002] In recent years, the application of turbochargers using ball bearings in small and medium-displacement automobile engines has attracted increasing attention at home and abroad due to their superior mechanical efficiency and transient response capabilities. However, due to the high speed of turbochargers, the general operating speed It can reach hundreds of thousands of revolutions per minute, and the highest can reach more than two hundred thousand revolutions per minute. The working conditions of ball bearings are harsh, and the requirements for reliability are relatively high. Therefore, how to prolong the service life of the ball bearing and reduce the vibration and noise of the ball bearing under high-speed rotation is the focus of current research in the industry...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the application of turbochargers using ball bearings in small and medium-displacement automobile engines has attracted increasing attention at home and abroad due to their superior mechanical efficiency and transient response capabilities. However, due to the high speed of turbochargers, the general operating speed It can reach more than 100,000 revolutions per minute, and the highest can reach more than 200,000 revolutions per minute. The working conditions of ball bearings are harsh, and the requirements for reliability are relatively high.

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