Magnesium alloy crankcase and bearing bush matching structure

A crankcase body and matching structure technology, which is applied in the direction of engine components, machines/engines, casings, etc., can solve the problems of loose sliding between the bearing bush and the crankcase bearing, the reduction of the oil film thickness of the main bush, and the impact on the operation and life of the engine, etc., to achieve Lubricating oil is smooth, the weight of the whole machine is reduced, and the effect of improving the tightness of fit

Inactive Publication Date: 2019-01-11
NO 60 RES INST OF GENERAL STAFF DEPT PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large deformation of the magnesium alloy crankcase under thermal environment and high-strength conditions, the bearing pad and the crankcase bearing are prone to loosening and sliding, and the oil film thickness of the main bearing pad will decrease, which directly affects the operation and life of the engine.

Method used

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  • Magnesium alloy crankcase and bearing bush matching structure
  • Magnesium alloy crankcase and bearing bush matching structure
  • Magnesium alloy crankcase and bearing bush matching structure

Examples

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Embodiment 1

[0018] This embodiment provides a magnesium alloy crankcase body and bearing pad cooperation structure, the structure is as follows Figure 1-3 As shown, it includes a crankcase 1, a bushing 2 and a bearing bush 3. The bushing 2 is nested between the crankcase 1 and the bearing bush 3, and the crankcase 1 and the bearing bush 3 are connected through the bushing 2. The outer wall surface of the bushing 2 There is an involute spline 4 on it, and one end of the bush 2 is connected with the bearing hole on the crankcase 1 through an interference connection, and the other end of the bush 2 is connected through the bush 2 The inner ring and the bearing bush 3 are connected by an interference connection. There is an oil hole in the middle of the bush, and oil holes are also arranged on the crankcase and the bearing bush, and the axial positions of the oil holes on the crankcase, the bush and the bearing bush are consistent. The box is made of ZM6 magnesium alloy material, the bushing...

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PUM

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Abstract

The invention provides a magnesium alloy crankcase and bearing bush matching structure, comprising a crankcase, a bushing and a bearing bush. The bushing is nested between the crankcase and the bearing bush, a spline is arranged on the outer wall surface of the bushing, one end of the bushing is connected with a bearing hole in the crankcase in an interference connection manner through the spline,and the other end of the bushing is connected with the bearing bush in an interference connection manner through an inner ring of the bushing. The magnesium alloy crankcase and bearing bush matchingstructure has a simple structure and can greatly improve the matching tightness of the bearing bush and the crankcase.

Description

technical field [0001] The invention relates to the field of engines, in particular to a matching structure between a magnesium alloy crankcase body and a bearing bush. Background technique [0002] The use of a magnesium alloy crankcase is an important means to reduce the weight of an aeroengine while meeting the requirements of use. However, due to the large deformation of the magnesium alloy crankcase under thermal environment and high-strength conditions, the bearing pad and the crankcase bearing are prone to loosening and sliding, and the oil film thickness of the main bearing pad will decrease, which directly affects the operation and life of the engine. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art and provide a magnesium alloy crankcase body and bearing shell matching structure with a simple structure, which can greatly improve the fit tightness between the bearing sh...

Claims

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Application Information

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IPC IPC(8): F02F7/00
CPCF02F7/0021F02F7/0053F02F7/0085
Inventor 周伟张铎丁瑞滕升平
Owner NO 60 RES INST OF GENERAL STAFF DEPT PLA
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