Leakage-stopping thrust bearing

Abstract

The invention discloses a leakage-stopping thrust bearing, which comprises a back plate arranged on a turbine shaft assembly, a thrust plate, an upper thrust gasket, a thrust bearing and a lower thrust gasket, wherein the thrust bearing is arranged between the upper thrust gasket and the lower thrust gasket; the back plate and the thrust plate are fastened on a middle body through screws; the outer circle concave groove of the thrust bearing is provided with a radial oil inlet hole; oil wedge surfaces of two end faces are provided with axial oil inlet holes; oil return holes staggered away from the axial oil inlet holes are formed in grooves formed in the two end faces; end face of the thrust plate is provided with an oil return groove which is matched with an end face groove of the thrust baring to form an oil return cavity; the end face of the middle body is provided with an oblique oil outlet hole. The way of returning oil in a dispersed way on both sides in the conventional product can be changed, lubricating oil of the thrust bearing is drained intensively and accurately in an enclosed space, and the phenomenon of oil leakage of a booster due to flow or sputtering of the oil around the back plate is avoided.

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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