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Manufacturing process of high-power low-speed diesel shaft bushing

A manufacturing process, high-power technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of low bearing strength, easy cracking, metallographic segregation, etc., to improve fatigue strength, improve bond strength, The effect of tight metallographic organization

Inactive Publication Date: 2009-10-21
CHONGQING YUEJIN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this pouring method is simple, it is suitable for thicker and larger bearing bushes. However, due to the different solidification time and temperature of the Babbitt alloy on the back of the bushing during static casting, and the thickness of the bearing bush Babbitt alloy is different, cracks are likely to occur. Pores, metallographic segregation and other problems lead to low strength and poor quality of bearing pads

Method used

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  • Manufacturing process of high-power low-speed diesel shaft bushing
  • Manufacturing process of high-power low-speed diesel shaft bushing
  • Manufacturing process of high-power low-speed diesel shaft bushing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The concrete method steps of a kind of manufacturing process of high-power low-speed diesel bearing bush are as follows:

[0049] (1) Rough manufacturing

[0050] ① Rough casting and heat treatment

[0051] Material preparation: the blank material is 4C steel, and the blank size is length × width × height = 1520 × 325 × 66mm, and then rolled into the upper and lower bearing bush blanks on the single-arm hydraulic press, and the gas secant line and milling line are drawn on the fitter table 1. Gas-cut the center facet, then place it in a holding furnace at 530°C for 3 hours for heat treatment, and finally mill the center facet on a milling machine.

[0052] ② rough machining

[0053] After step (1)-① is completed, the upper and lower bearing bush blanks prepared in step (1)-① are welded together to form a circular ring, and then the inner and outer surfaces 3, 4 and left , The right end face 1, 2, and then use the milling machine to semi-finish the two mid-section sur...

Embodiment 2

[0079] A kind of concrete method step of the manufacturing process of high-power low-speed diesel engine bearing bush is as follows:

[0080] (1) Rough manufacturing

[0081] With embodiment 1. The characteristics are: the heat treatment temperature of the bearing bush blank in the holding furnace is changed to 500°C, and the heat treatment time is 2.7 hours. The axial width of the feeding groove 5 is 4mm, and the radial depth is 4mm.

[0082] (2) Treatment of blank pouring surface

[0083] With embodiment 1. The feature is: use industrial alkali to prepare 8% NaOH solution for scrubbing, and soak for 4 minutes with 10% industrial hydrochloric acid.

[0084] (3) The pouring surface is tinned

[0085] With embodiment 1. The characteristics are: the preheating temperature is 170°C, and the preheating time is 30 minutes. When enamelling, soak in the tin pot for 4 minutes.

[0086] (4) Pouring Babbitt alloy

[0087] With embodiment 1. The feature is: after pouring is com...

Embodiment 3

[0091] A kind of concrete method step of the manufacturing process of high-power low-speed diesel engine bearing bush is as follows:

[0092] (1) Rough manufacturing

[0093] With embodiment 1. The characteristics are: the heat treatment temperature of the bearing bush blank in the holding furnace is changed to 550°C, and the heat treatment time is 2.5 hours. The axial width of the feeding groove 5 is 6mm, and the radial depth is 6mm.

[0094] (2) Treatment of blank pouring surface

[0095] With embodiment 1. The feature is: use industrial alkali to prepare 10% NaOH solution for scrubbing, and soak for 5 minutes with 10% industrial hydrochloric acid.

[0096] (3) The pouring surface is tinned

[0097] With embodiment 1. The characteristics are: the preheating temperature is 200°C and the preheating time is 20 minutes. When enamelling, soak in a tin pot for 5 minutes.

[0098] (4) Pouring Babbitt alloy

[0099] With embodiment 1. The feature is: after the pouring is c...

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Abstract

The invention relates to a manufacturing process of a bearing bush of a high-power low-speed diesel engine, which belongs to the technical field of manufacturing bearing bushes of large mechanical equipment. In the invention, the bearing bush is manufactured according to the technological sequence of: rough blank manufacturing → blank pouring surface treatment (shot blasting treatment and cleaning) → tin enamel → casting babbitt alloy → finishing machining and final inspection. Because the method of the present invention has the characteristics of simple manufacture, high product strength, good quality, high reliability, and low production cost, the product manufactured by the process of the present invention has a uniform metallographic structure, high bonding strength of the alloy layer, and can meet large Therefore, the bearing bush manufactured by the present invention can be widely used in large-scale heavy-duty mechanical equipment, and is especially suitable for marine high-power low-speed diesel engines.

Description

technical field [0001] The invention belongs to the technical field of manufacturing bearing bushes of large mechanical equipment, and in particular relates to a manufacturing process of bearing bushes for high-power low-speed diesel engines. Background technique [0002] Bearing bush is a mechanical element used to support shaft parts and make the bearing surfaces slide relative to each other. As a key basic component, it is widely used in large-scale mechanical equipment such as machine tools, electric motors, generators, internal combustion engines, steel rolling machinery, and mining machinery. Especially in the internal combustion engine, the performance of the bearing pad has a direct impact on the performance, working reliability and life of the internal combustion engine. High-power low-speed diesel engines are mainly used in large ships with large loading capacity such as large cargo ships and oil tankers. Higher and higher demands have been put forward. The paten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/14
Inventor 周荣康吴智勇谢久彬陈永红张乐唐倩徐杰
Owner CHONGQING YUEJIN MACHINERY
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