CN2454542Y

CN2454542Y - Integrated intermedioate casing of waste-gas turbine booster of diesel engine

Info

Publication number: CN2454542Y
Application number: CN 00263362
Authority: CN
Inventors: 傅思侃; 陈正德; 郁公鲁
Original assignee: Shanghai Diesel Engine Co Ltd
Current assignee: Shanghai Diesel Engine Co Ltd
Priority date: 2000-12-19
Filing date: 2000-12-19
Publication date: 2001-10-17
Anticipated expiration: 2010-12-19

Abstract

The utility model relates to a structural improvement of an exhaust gas turbocharger of diesel engines, which is an integrated intermediate casing of an exhaust gas turbocharger of the diesel engine. The exhaust gas turbocharger of the diesel engines is composed of a bearing body (6) and a pressure expanding plate (3) of a compressor, the bearing body and the pressure expanding plate of the compressor are cast into integration, and the center of two supporting bearing holes (7) of a rotor shaft (10) and an installing hole of a seal ring seat (4) are concentric and are vertical with the positioning end surface of the seal ring seat. The utility model has the advantages of good rigidity of the compressor, steady operation, reliable seal, and long service life of components.

Description

Diesel exhaust turbosupercharger integrated type middle case

The utility model relates to a kind of architecture advances of diesel exhaust turbosupercharger.

Usually, exhaust-gas turbocharger is that use for diesel engine is to improve power and to improve the vitals that discharges.The mid power high-speed diesel engine generally adopts the small-type radial exhaust-gas turbocharger both at home and abroad, its typical conventional construction is two supporting sliding bearings of rotor shaft, be installed on the bearing support, and important lubricating oil black box is installed on the gas compressor diffusion plate, becomes middle case with bolted on connection between the bearing support of split manufacturing and the gas compressor diffusion plate.Because the necessary machining tolerance of machining, must influence the precision and the positional accuracy of fitted position when connecting, the former is cast iron for while two parts, the latter is a cast aluminium, the material thermal expansion coefficient difference, usually pressurized machine is at diesel engine high-temperature exhaust air and rotor shaft rotating speed under the abominable operating conditions up to 100,000 rev/mins, two parts are the size error of the assembly accumulation sum of errors different heat expansion amount of deformation generation of machining tolerance separately, just be difficult to guarantee the perpendicularity and the concentricity requirement of bearing hole center and lubricating oil seal ring seat, often cause lubricating oil to leak, the bearing premature wear, the serious compressor impeller grazing compressor casing that causes on the rotor shaft influences pressurized machine functional reliability and working life.

The purpose of this utility model provides a kind of diesel exhaust turbosupercharger integrated type middle case simple in structure, it can eliminate the assembly error that bearing support and gas compressor diffusion plate adopt bolted on connection after the split manufacturing, assurance is installed on seal ring seat and bearing hole concentricity and the perpendicularity requirement on the gas compressor diffusion plate, improve the rigidity of middle case greatly, prevent that lubricating oil from leaking and the premature wear of rotor bearing.

The utility model is achieved in that diesel exhaust turbosupercharger integrated type middle case, form by bearing support and gas compressor diffusion plate, bearing support and gas compressor diffusion plate cast solid, the center, two block bearing holes of rotor shaft is concentric with the mounting hole of seal ring seat, keeps vertical with seal ring seat location end face.

Its working principle is that bearing support and gas compressor diffusion plate have been cancelled split manufacturing bolted on connection structure, be cast as the integrated type middle case, be convenient to mechanical processing technique, guarantee bearing hole center and the concentricity and the perpendicularity requirement that are installed on the lubricating oil seal ring seat on the gas compressor diffusion plate, the connection that can eliminate simultaneously owing to different materials causes the different size errors that cause of thermal expansion amount.

Fig. 1 is a diesel exhaust turbosupercharger integrated type middle case structural representation.

Among the figure, 1 is compressor impeller, and 2 is compressor casing, and 3 is gas compressor diffusion plate, and 4 is seal ring seat, and 5 is seal ring, and 6 is bearing support, and 7 is bearing hole, and 8 is the seal ring seat hole, and 9 are seal ring seat location end face, and 10 is rotor shaft, and 11 is sliding bearing.

Concrete structure of the present utility model is provided by following drawings and Examples.

As shown in Figure 1, two supporting sliding bearings 11 of rotor shaft 10 are installed on the bearing hole 7 of bearing support 6, seal ring seat 4 is installed on the seal ring seat hole 8 and seal ring seat location end face 9 of gas compressor diffusion plate 3, bearing support 6 and gas compressor diffusion plate 3 are cast as one, bearing hole 7 is with respect to the concentricity in seal ring seat hole 8 and the perpendicularity of seal ring seat location end face 9, being guaranteed by the whole processing of numerically controlled lathe, full accuracy can reach≤and 0.025 millimeter.

Integrated type middle case of the present utility model is adopted in evidence, has the pressurized machine good rigidly, and running steadily seals reliably the remarkable result that part life is long.

Claims

1. diesel exhaust turbosupercharger integrated type middle case, form by bearing support and gas compressor diffusion plate, it is characterized in that bearing support and gas compressor diffusion plate cast solid, the center, two block bearing holes of rotor shaft is concentric with the mounting hole of seal ring seat, keeps vertical with seal ring seat location end face.