Leakage Type Thrust Bearings

Abstract

The invention discloses an anti-leakage type thrust bearing, comprising: a back plate, a thrust plate, an upper thrust washer, a thrust bearing and a lower thrust washer arranged on a turbine shaft assembly, the thrust bearing is installed Between the upper thrust washer and the lower thrust washer, the back plate and the thrust plate are fastened on the intermediate body by screws, and the outer circular concave groove of the thrust bearing is provided with a radial oil inlet hole, There are axial oil inlet holes on the oil wedge surfaces of both ends, and oil return holes staggered from the axial oil inlet holes are arranged in the grooves on both ends, and the end faces of the thrust plate are provided with oil return grooves and thrust bearings The groove on the end face of the intermediate body cooperates to form an oil return chamber, and the end face of the intermediate body is provided with an oblique oil outlet hole. Through the above method, the present invention can change the method of dispersing and returning oil on both sides in traditional products, so that the lubricating oil of the thrust bearing can be concentrated and accurately discharged in a closed space, and the oil will not flow or splash around the back plate And form supercharger oil leakage phenomenon.

Description

technical field [0001] The invention relates to the technical field of turbochargers, in particular to an anti-leakage type thrust bearing. Background technique [0002] The turbocharger uses the high-temperature exhaust gas discharged from the engine to drive the turbine in the turbine to rotate to do work. The turbine shaft drives the impeller in the coaxially connected compressor to rotate at high speed, compressing the air in a centrifugal manner, and providing high-pressure, high-density air to the engine. , so that more fuel can be injected into the engine to achieve the purpose of increasing engine power, torque and reducing emissions. [0003] In the traditional structure of the rotor assembly, which is the core of the turbocharger, the thrust bearings are fixed on the intermediate body, and the oil wedge surface is designed on both sides or one side, and the thrust washer is designed on the turbine shaft to clamp On both sides of the thrust bearing, the axial effec...

AI Technical Summary

Problems solved by technology

[0004] This design can meet the requirements of the performance of the supercharger, but structurally speaking, after the incoming lubricating oil enters the oil passage from the oil hole of the thrust bearing to form an oil film, the oil return is often only along the open thrust bearing. The oil return circuit is free to discharge, so that the discharged oil has no fixed direction and position, and the oil will flow around the back plate, causing the supercharger to leak oil, resulting in failure

[0005] The previous method was to add more oil baffles, but it did not solve the root of the problem, and the speed range of the turbocharger is very wide, from several thousand rpm to more than 200,000 rpm, and the turbine and pressure wheel work at high speed When there are vibrations and other factors, it is very difficult to prevent oil leakage design.

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