Squeeze film damper bearing

Abstract

The invention provides a squeeze film damper bearing, which comprises a hollow cylindrical bearing body, wherein the bearing body comprises outer bearing rings and inner bearing rings; an annular groove is formed on the inner ring surface of the inner bearing ring on at least one end part of the bearing body, and is outwards extended axially from the inner ring surface and radially along the inner ring; moreover, oil discharge grooves used for providing channels for lubricating oil to flow out of the inner ring surface are formed along an axial direction of the bearing body on the inner ring surface. The squeeze film damper bearing provided by the embodiment of the invention reduces a contact area between a main shaft and the inner bearing ring at the same time of ensuring an effective bearing area, and can achieve reduction in sensitivity to oil temperature and an improvement on the working stability. Moreover, the oil discharge grooves are formed on the inner ring surfaces so as to increase the circulation speed of the lubricating oil and the utilization rate of the lubricating oil, further improve the heat removal and temperature reduction capability of the bearing and achieve a better heat removal effect.

Description

technical field [0001] The invention relates to the technical fields of turbocharger technology and bearings, and relates to a squeeze oil film damper bearing, in particular to a novel squeeze oil film damper bearing for an internally supported turbocharger. Background technique [0002] Bearings are the most precise and critical core components in turbochargers. Bearings play a very important role in the overall efficiency and reliability of turbochargers and the working stability and durability of engines (such as diesel engines, gasoline engines, etc.) . [0003] At present, due to the requirements of high efficiency, reliability and compact structure of diesel engines, most manufacturers generally install internally supported turbochargers in diesel engines. In the existing Squeeze Oil Film Damper bearings in turbochargers with internal support, since the oil film between the outer ring of the bearing and the bearing seat plays a certain role in damping and shock absorp...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a squeeze oil film damper bearing to solve the problem of increasing the rotor stability by increasing the size of the bearing in the prior art due to the fact that the contact area between the inner ring of the bearing and the main shaft also changes The increase will cause a large amount of heat to be generated in the bearing, causing damage to the bearing, poor working stability of the bearing and other defects, improving the working stability of the bearing

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