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Silicon nitride ceramic piston rod and preparation method thereof

A silicon nitride ceramic and piston rod technology, applied in pistons, mechanical equipment, epoxy resin glue, etc., can solve the problems of large difference in thermal expansion coefficient of piston rod, ceramic layer falling off, limiting the thickness of ceramic layer, etc., to ensure sustainable Effects of Sex and Stability

Pending Publication Date: 2022-04-01
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is a surface oxidation process to form a ceramic layer, but the oxidation process limits the thickness of the ceramic layer, and the difference in thermal expansion coefficient between the ceramic layer and the piston rod is relatively large, and the ceramic layer is likely to fall off after working for a long time

Method used

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  • Silicon nitride ceramic piston rod and preparation method thereof
  • Silicon nitride ceramic piston rod and preparation method thereof
  • Silicon nitride ceramic piston rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A silicon nitride ceramic piston rod, comprising:

[0046] A mandrel 1, the mandrel 1 is provided with a thread 6;

[0047] The ceramic bushing 4 is sheathed on the outside of the mandrel 1, and the mandrel 1 and the ceramic bushing 4 are connected through an adhesive layer 9; the mandrel 1 is relatively located outside the ceramic bushing 4 with a limit seat 8. There is an end gap 2 between the limit seat 8 and the ceramic bushing 4 .

[0048] The adhesive layer 9 includes the following raw materials in parts by weight: 80-100 parts of epoxy resin, 20-40 parts of amine curing agent, 5-10 parts of quartz ceramic powder or boron nitride ceramic powder, short 3 to 5 servings of fiber.

[0049] Such as figure 1 As shown, it also includes a first glue storage tank 3 located on the inner wall of the ceramic bushing 4, and the adhesive layer 9 is filled in the first glue storage tank 3 and between the mandrel 1 and the ceramic bushing 4; as Optionally, the ceramic bushing...

Embodiment 2

[0058] This embodiment provides a method for preparing a silicon nitride ceramic piston rod,

[0059] Step 1: Preparation of ceramic bushing: After sintering, the high-purity dense silicon nitride ceramic blank (purity ≥ 88%) is mechanically cold-processed to form a length of 450 mm, an outer diameter of 80 mm, an inner diameter of 40 mm, and a bottom thickness of 20mm cylindrical socket.

[0060] Step 2: Preparation of the mandrel: select 310S heat-resistant stainless steel bar, and through mechanical processing, prepare a cylindrical mandrel with a length of 500mm and an outer diameter of 39mm, and set an overflow glue with an inner diameter of 5mm and run through the mandrel Holes, milling coarse threads on the mandrel section of the bonding assembly with the ceramic bushing to increase the bonding area.

[0061] Step 3: Bonding of the ceramic bushing to the mandrel:

[0062] ① Cleaning of ceramic bushings.

[0063] Use anhydrous ethanol to clean the inner and outer wall...

Embodiment 3

[0075] This embodiment provides a method for preparing a silicon nitride ceramic piston rod,

[0076] Step 1: Processing and preparation of ceramic bushings: After sintering, the high-purity dense silicon nitride ceramic blank (purity ≥ 88%) is mechanically cold-processed to form a length of 450mm, an outer diameter of 80mm, an inner diameter of 40mm, and a thickness of the bottom It is a 20mm cylindrical sleeve, and grooves with a width of (2-5) mm are evenly processed on the inner wall of the ceramic bushing, and the groove spacing is (10-20) mm.

[0077] Step 2: Processing and preparation of the mandrel: select 310S heat-resistant stainless steel bar, and through mechanical processing, prepare a cylindrical mandrel with a length of 500 mm and an outer diameter of 39 mm. The glue hole is milled with coarse threads on the mandrel section of the bonding assembly with the ceramic bushing to increase the bonding area.

[0078] Step 3: Adhesive assembly of ceramic bushing and ma...

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Abstract

The invention discloses a silicon nitride ceramic piston rod and a preparation method of the silicon nitride ceramic piston rod. The ceramic bushing is sleeved outside the core shaft, the adhesive layer is filled between the core shaft and the ceramic bushing, and the core shaft is connected with the ceramic bushing through the adhesive layer; the first glue storage groove is formed in the inner wall of the ceramic lining, and an adhesive filled in the first glue storage groove is connected with the adhesive layer. The ceramic lining and the core shaft are connected through the adhesive, the corrosion resistance, abrasion resistance and low expansion performance of ceramic are fully utilized, long-time high-performance operation of the ceramic piston rod assembly is achieved, and sustainability and stability of industrial production are guaranteed.

Description

technical field [0001] The invention relates to the field of piston rod preparation, in particular to a silicon nitride ceramic piston rod and a preparation method thereof. Background technique [0002] In traditional industrial production, the compressor basically uses metal pistons, and the piston connecting rod bushes are mostly made of aluminum alloy, white alloy, copper-lead alloy and other materials, and are mainly prepared by casting. Although these alloy materials have good wear-reducing performance , but the material is easy to expand when heated, which cannot meet the needs of long-term high-power operation. Frequent maintenance and replacement seriously reduce the operating efficiency of the overall equipment. [0003] In a large compressor or engine, the working environment of the piston and connecting rod is extremely harsh. During the working process, the high-speed continuous operation and the high temperature working environment are subjected to periodic cycl...

Claims

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Application Information

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IPC IPC(8): F04B39/00F02F3/00C09J163/00C09J11/04
Inventor 唐建新邢政鹏栾强王艳艳宋奎明王洪升王长征王响程洪浩姜立平
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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