Turbocharger bearing body structure with integral ball bearing

Abstract

Turbocharger bearing body structure with integral ball bearing, including bearing body, integral ball bearing, positioning pin and oil inlet bolt; integral ball bearing is installed in the bearing hole of the bearing body; the upper end of the positioning pin is installed in the pin of the bearing body In the hole A, the lower end is inserted into the pin hole B of the outer ring of the integral ball bearing, and the outer ring of the integral ball bearing is fixedly connected with the bearing body; the lower end of the oil inlet bolt is threaded into the internal thread hole of the bearing body, and the upper end is located in the bearing body external. The advantage of the present invention is that only a single integral ball bearing is used in the inner hole of the bearing body. Compared with the existing structure using two floating bearings, the present invention has a simpler structure and more convenient assembly. An annular oil storage chamber is formed between the lower end surface of the oil inlet bolt, the outer wall of the positioning pin and the wall of the stepped hole, which solves the problem of the lubricating oil supply lagging behind when the engine starts, and avoids the dry friction of the integral ball bearing during the initial rotation .

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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