Method for manufacturing composite prestress enhanced ceramic cylinder sleeve

A manufacturing method and prestressing technology, applied to cylinders, engine components, mechanical equipment, etc., can solve the problems of high processing accuracy, lower combustion chamber temperature, incompleteness, etc., achieve low processing accuracy requirements, and reduce heat dissipation loss , The effect of heat dissipation loss reduction

Inactive Publication Date: 2014-02-26
WUXI INST OF ARTS & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the heat absorption and heat dissipation of the water cooling system, part of the heat energy will be consumed, which will reduce the temperature of the combustion chamber in the cylinder. In some cases, the fuel in the combustion chamber will not burn quickly and completely, reducing the heat engine efficiency of the internal combustion engine. It will also produce harmful gases from incomplete combustion, polluting the environment
[0003] In view of the above situation, some data propose to use the high temperature resistance of ceramic materials to manufacture water-free ceramic internal combustion engines. However, due to the brittleness of ceramic materials, they do not have basic assembly functions and use strength. Therefore, in the production of ceramic cylinder liners There are difficulties in the application and use, and some people design the method of prestressing by precision machining, heating, assembly and cooling, but the processing accuracy is too high, it is difficult to ensure that the size of the prestress is appropriate, and the stability of the enhanced performance is difficult to guarantee.

Method used

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  • Method for manufacturing composite prestress enhanced ceramic cylinder sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: prepare as figure 1 The composite prestressed ceramic-lined cylinder liner shown has the following structure: it includes a metal outer shell 1 and a ceramic inner liner 2, and the ceramic inner liner 2 is cast in the metal outer shell 1; wherein, the wall thickness of the ceramic inner liner 2 is 5mm, and the ceramic inner liner 2 The material of the lining 2 is silicon nitride ceramics.

[0022] The preparation method of the above-mentioned composite prestressed reinforced ceramic liner liner specifically includes the following steps:

[0023] 1) The ceramic lining 2 is manufactured and processed by the manufacturing and processing method of industrial ceramics, so that the inner surface and size meet the requirements of the cylinder liner, the thickness is uniform, and the outer surface is smooth and clean;

[0024] 2) Make a molten metal casting sand mold and place the ceramic lining 2 in it so that the centerline of the ceramic lining coincides with ...

Embodiment 2

[0029] Embodiment 2: Prepare composite prestressed reinforced ceramic liner cylinder liner, the structure is: comprise metal outer shell 1 and ceramic inner liner 2, ceramic inner liner 2 is cast in metal outer shell 1; Wherein, the wall thickness of ceramic inner liner 2 is 10mm , the material is alumina ceramics.

[0030] The preparation method of the above-mentioned composite prestressed reinforced ceramic liner liner specifically includes the following steps:

[0031] 1) Manufacture and process the ceramic lining 2 so that its inner surface and size meet the requirements of the cylinder liner, with uniform thickness and smooth outer surface;

[0032] 2) Make a metal casting sand mold and place the ceramic lining 2 in it, and place the center position accurately;

[0033] 3) Heat the ceramic lining 2 to 900°C and wait for casting;

[0034] 4) Pour the molten metal from the casting port into the sand mold with the ceramic lining as the inner mold. The molten metal is coole...

Embodiment 3

[0037] Embodiment 3: basically the same as Embodiment 1, the difference is the requirements of the ceramic lining and the temperature for heating the ceramic lining in step 3) during preparation;

[0038] Among them, the ceramic lining is made of silicon oxide ceramics, and its wall thickness is 8mm;

[0039] During preparation, in step 3), the ceramic lining is heated to 800°C and then cast.

[0040] Compared with similar models, the invention can reduce the heat dissipation loss of the cylinder liner by 20%, increase the temperature of the combustion chamber of the cylinder by 200°C, and increase the heat engine efficiency by 12%.

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Abstract

The invention discloses a composite prestress enhanced ceramic cylinder sleeve and manufacturing method thereof. The composite prestress enhanced ceramic cylinder sleeve comprises a metal outer sleeve and a ceramic lining, wherein the manufactured ceramic lining is put into a metal casting die and is heated to a certain temperature, molten metal is poured in the casting die, and after the molten metal is cooled naturally, the metal outer sleeve has pressure stress on the ceramic lining to improve the mechanical strength of ceramics, so that the ceramics can meet the requirement of the using strength of the cylinder sleeve. The method for manufacturing the composite prestress enhanced ceramic cylinder sleeve is simple, and the good matching of the ceramics and metal can be realized and prestress can be controlled by regulating coefficients of thermal expansion of the ceramics and the metal. When the lining cylinder sleeve manufactured by the method is used, the outside of the cylinder sleeve is not required to be cooled by using a cooling liquid system, the radiation loss of the cylinder sleeve can be reduced, and the temperature of a combustion chamber of an internal-combustion engine can be improved, so that fuel can be combusted quickly and fully, and the efficiency of a heat engine of the internal-combustion engine is improved.

Description

technical field [0001] The invention relates to a cylinder liner of an internal combustion engine, in particular to a method for manufacturing a composite prestressed reinforced ceramic liner liner. Background technique [0002] At present, the cylinder liners of internal combustion engines are all made of metal materials. In order to prevent the temperature of the cylinder liners from being too high when the internal combustion engine is working, which will affect the service strength of the cylinder liners, a water cooling system is installed outside the cylinder liners to ensure that the internal combustion engine does not operate at a high temperature. work normally. Due to the heat absorption and heat dissipation of the water cooling system, part of the heat energy will be consumed, which will reduce the temperature of the combustion chamber in the cylinder. In some cases, the fuel in the combustion chamber will not burn quickly and completely, reducing the heat engine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/08F16J10/00F16J10/04
Inventor 顾永成刘宣飞谢建平张萍辉
Owner WUXI INST OF ARTS & TECH
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