Turbocharger bearing body assembly

Abstract

The invention relates to a turbocharger bearing body assembly. A bearing body is provided with an oil inlet hole, a main oil guide hole, an air-pressure-end oil guide inclined hole, a turbine-end oilguide inclined hole, an air-pressure-end floating bearing hole, a turbine-end floating bearing hole, a main oil chamber and an oil outlet hole. An independent cooling oil cavity is arranged at the turbine end of the bearing body, and penetrates through the upper and lower structures of the turbine end of the bearing body. An oil injection hole is arranged at the turbine end of the main oil guide hole, and communicates with the independent cooling oil cavity. A lubricating oil pressure relief hole is arranged at the bottom, near the oil outlet hole, of the independent cooling oil cavity, and communicates with the main oil chamber to facilitate the timely discharge of lubricating oil in the cooling oil cavity to the main oil chamber.

Description

technical field [0001] The invention relates to the technical field of turbochargers, in particular to a turbocharger bearing assembly used on the turbocharger and capable of improving cooling effect. Background technique [0002] With the continuous improvement of internal combustion engine strengthening and increasingly stringent emission standards, turbocharging technology has become one of the most critical measures to improve the economy, power and emission standards of internal combustion engines. With the development of diesel and gas engine turbocharging technology, the exhaust gas temperature it bears is also increasing. Since the sealing ring and bearing system are the weak links in the structure of the turbocharger, it has a great impact on the reliability of the turbocharger, and even Work efficiency has a very important impact. [0003] Existing turbocharger bearing body as attached Figure 5 As shown, the bearing body is provided with oil inlet hole 1, main oi...

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Problems solved by technology

Chinese patent ZL201320805367.1 discloses a "turbocharger water-cooled bearing body". The bearing body is provided with a cooling water cavity, and the cooling water in the cooling water cavity is cooled with lubricating oil. This structure can effectively reduce the turbocharger turbine. The temperature of the end seal ring and the floating bearing at the turbine end, but this structure needs to introduce external cooling medium water, increase the peripheral installation of the engine, the structure and assembly are complicated, and the cost is high, which affects its wide application in turbochargers

Chinese patent ZL201420476584.5 discloses a "turbocharger bearing body". The bearing body is provided with an oil injection hole, and the bearing body at the turbine end is forcibly cooled by spraying cooling oil through the oil injection hole. This structure can reduce the turbine end seal to a certain extent. The temperature of the ring, but the cooling effect of this structure is limited, and after the engine is stopped, the structure cannot effectively reduce the heat backflow, which leads to the "heat recovery phenomenon" of the turbine end seal ring and the turbine end floating bearing, and the reliability of the supercharger is affected.

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