A turbocharger bearing body structure

Abstract

The invention provides a turbocharger bearing body structure and belongs to the technical field of turbochargers. The turbocharger bearing body structure comprises an air-compressor-end bearing pedestal, a turbo-end bearing pedestal, an oil inlet hole, an oil inlet pipe, a heat insulating oil return cavity of the turbo-end bearing pedestal, a turbo sealing ring seat, a bearing pedestal support body, an oil return cavity and an oil return hole and is characterized in that a cavity is hollowed out at the connecting part of the upper part of the turbo-end bearing pedestal structure and a bearingbody as big as possible, the edge of the cavity is previously arranged for proper wall thickness, directly reaches the oil inlet hole and turns back along the oil inlet pipe, and the bearing pedestalsupport body is additionally arranged at the lower part of the turbo-end bearing pedestal. The turbocharger bearing body structure has the beneficial effects that the length of a heat transferring path from a turbo to the turbo-end bearing pedestal in a low-temperature zone is increased, and dissipated heat on the heat transferring path is increased, so that the mount of the heat transferred fromthe high-temperature turbo to the turbo-end bearing pedestal is reduced, and the temperature rise of the turbo-end bearing pedestal is inhibited.

Description

technical field [0001] The invention belongs to the technical field of turbochargers, in particular to a turbocharger bearing body structure. Background technique [0002] A turbocharger for an internal combustion engine uses the turbine to extract energy from the exhaust gas of the engine to drive the compressor to increase the charge density and capacity of the cylinder of the internal combustion engine. The bearing body of the turbocharger connects the turbine and the compressor, supports the rotor including the turbine and the compressor, realizes high-speed operation of tens of thousands to hundreds of thousands of rpm, and simultaneously targets the pressure gas of the compressor and the turbine end 800 ℃ ~ 1100 ℃ high temperature pressure gas, to achieve the function of sealing and heat dissipation. At present, the most common structure is that the compressor and the turbine are separated at both ends of the bearing body, and the bearing and seal are placed in the be...

AI Technical Summary

Problems solved by technology

Because the turbine case and turbine impeller were still at high temperature at that time, the lubricating oil supply also stopped suddenly after the engine stopped suddenly, that is, the cooling effect of the lubricating oil was gone, and as a result, heat flowed from the turbine case and turbine impeller to the bearing parts and seal ring parts If the temperature of these two places rises suddenly, the structure of the bearing body will directly affect the heat transfer and heat dissipation effect, and then affect the working temperature of the turbine end bearing and sealing ring

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