Shafting structure of self-lubricating turbocharger ball bearing

Abstract

The invention relates to the technical field of shafting lubrication, and discloses a shafting structure of a self-lubricating turbocharger ball bearing. A turbocharger comprises a bearing seat, a gas compressor volute, an oil sealing cover, a turbine box, a rotor shaft, an impeller and a back disc assembly. The back disc assembly comprises a back disc cooperating with the gas compressor volute, the turbine box is connected with the gas compressor volute, the periphery of the bearing seat is embedded into a gas inlet of the gas compressor volute, an oil storage cavity is formed among the oil sealing cover, the bearing seat and the gas compressor volute, and the pressure in the oil storage cavity and the environmental pressure are balanced. The shafting structure comprises a sleeve part arranged at the position of a center shaft of the bearing seat, the rotor shaft and the impeller are assembled and inserted into the sleeve part, a bearing seat cavity is formed among the rotor shaft, the impeller and the inner wall of the sleeve part, a bearing assembly is arranged on the shaft section, inserted into the sleeve part, of the rotor shaft, and a channel capable of conveying lubricating oil is arranged between the bearing seat cavity and the oil storage cavity. The oil storage cavity and the channel are arranged, and the micro-negative pressure environment of the bearing seat cavity is utilized to ensure that lubricating oil is automatically conveyed along the channel to lubricate the shafting structure.

Description

technical field [0001] The invention belongs to the technical field of shafting lubrication, and in particular relates to a shafting structure of a self-lubricating turbocharger ball bearing. Background technique [0002] At present, the bearing lubrication system of turbocharged technology products at home and abroad basically adopts external oil supply lubrication technology, and turbocharger shaft systems such as double floating bearings, semi-floating bearings and ball bearings use engine lubrication to lubricate and dissipate heat from their shaft bearings. The lubricating oil inlet of the turbocharger is connected with the main oil passage of the engine to form an oil inlet pipeline; the lubricating oil return of the turbocharger is connected with the engine oil pan to form an oil return pipeline. The oil inlet and return pipes of the turbocharger are special parts, and the engine needs to be specially designed to require sealing, high pressure resistance, corrosion re...

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Problems solved by technology

[0004] As the turbocharger uses engine lubricating oil, the aging of the engine lubricating oil will contain piston wear metal particles, engine micro-particle carbon residue, corrosion on the inner wall of the lubricating oil pipeline, etc., which will cause scratches on the turbocharger bearings, abnormal wear, and bearing sticking , sintering or sealing system failure, eventually causing a large amount of turbocharger lubricating oil to leak out, seriously affecting the safe use of the engine

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