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A kind of polyimide composite material, porous polyimide cage and its preparation method, bearing

A polyimide and benzene polyimide technology, applied in the field of polyimide composite materials, can solve the problems of large dispersion, difficulty in stable control of the hole diameter of the cage tube blank material, and poor wear resistance.

Active Publication Date: 2021-11-26
LUOYANG BEARING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the technical process, it is difficult to control the pore diameter of the cage tube material prepared by the above method stably at 1.0 μm, the dispersion of the pore diameter is large, and the wear resistance is relatively poor.

Method used

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  • A kind of polyimide composite material, porous polyimide cage and its preparation method, bearing
  • A kind of polyimide composite material, porous polyimide cage and its preparation method, bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The polyimide composite material of this embodiment is composed of the following components in mass percentage: 70% of homophenylene polyimide molding powder, and 30% of monoether anhydride type polyimide molding powder.

[0047] The porous polyimide cage of the present embodiment is made of the following raw materials in mass percentage: 70% of homophenylene polyimide molding powder, 30% of monoether anhydride polyimide molding powder; The porosity of the amine cage is 20%.

[0048] The preparation method of the porous polyimide cage of the present embodiment comprises the following steps:

[0049] 1) Put the polyphenylene polyimide molding powder in a drying oven, dry at 240°C for 2 hours, cool to room temperature, pass through a 400-mesh sieve, and seal the undersieve for later use;

[0050] Put the monoether anhydride polyimide molding powder in a drying oven, dry at 150°C for 2 hours, cool to room temperature, pass through a 400-mesh sieve, and seal the under-siev...

Embodiment 2

[0055] The polyimide composite material of this embodiment is composed of the following components in mass percentage: 55% of homophenylene polyimide molding powder, and 45% of bis-ether anhydride type polyimide molding powder.

[0056] The porous polyimide cage of the present embodiment is made of the following raw materials in mass percentage: 55% of homophenylene polyimide molding powder, 45% of bis-ether anhydride type polyimide molding powder; The porosity of the imine cage is 10%.

[0057] The preparation method of the porous polyimide cage of the present embodiment comprises the following steps:

[0058] 1) Put the polyphenylene polyimide molding powder in a drying oven, dry at 240°C for 1 hour, cool to room temperature, pass through a 400-mesh sieve, and seal the undersieve for later use;

[0059] Put the bis(ether anhydride) polyimide molding powder into a drying oven, dry at 180°C for 1 hour, cool to room temperature, pass through a 400-mesh sieve, and seal the unde...

Embodiment 3

[0064] The polyimide composite material of this embodiment is composed of the following components in mass percentage: 85% of homophenylene polyimide molding powder, and 15% of ketone anhydride type polyimide molding powder.

[0065] The porous polyimide cage of the present embodiment is made of the following raw materials in mass percentage: 85% of homophenylene polyimide molding powder, 15% of ketone anhydride type polyimide molding powder; The porosity of the amine cage is 28%.

[0066] The preparation method of the porous polyimide cage of the present embodiment comprises the following steps:

[0067] 1) Put the polyphenylene polyimide molding powder into a drying oven, dry at 200°C for 4 hours, cool to room temperature, pass through a 400-mesh sieve, and seal the under-sieve for future use;

[0068] Put the ketone anhydride type polyimide molding powder in a drying oven, dry at 120°C for 4 hours, cool to room temperature, pass through a 400-mesh sieve, and seal the under...

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Abstract

The invention relates to a polyimide composite material, a porous polyimide cage, a preparation method thereof, and a bearing. The polyimide composite material of the present invention is mainly composed of the following components in mass percentage: 55% to 85% of homophenylene polyimide, 15% to 45% of thermoplastic polyimide; the thermoplastic polyimide is ketone anhydride At least one of type polyimide and ether anhydride type polyimide. The polyimide composite material of the present invention is compounded with high hardness, strong rigidity and infusible phenylene polyimide and thermoplastic polyimide, so that when it is used to prepare a porous polyimide cage, It can improve the high tensile strength, high hardness, high wear resistance and good temperature resistance of the porous polyimide cage, and at the same time reduce the hole diameter and thermal expansion coefficient of the porous polyimide cage, which is beneficial to the lubrication of lubricating oil. The release and absorption are beneficial to the long-term lubrication of the bearing, and can be widely used in the field of long-life momentum bearing cages.

Description

technical field [0001] The invention relates to a polyimide composite material, a porous polyimide cage, a preparation method thereof, and a bearing, and belongs to the technical field of polyimide composite materials. Background technique [0002] Porous polyimide cage has the advantages of high tensile strength, good chemical stability, excellent tribological performance, good resistance to space environment, etc. It provides long-term, good and continuous oil lubrication during use, and is widely used in high-precision and It is required to provide long-life momentum wheel bearings with special requirements such as continuous lubrication. [0003] With the further improvement of engine customers' requirements for the life and reliability of momentum wheel bearings, the existing porous polyimide materials cannot meet the requirements in terms of pore size and narrowing control, wear resistance and other indicators, and it is increasingly becoming the limit of momentum whee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08B29C43/00B29C43/02B29B7/00
CPCB29B7/002B29C43/003B29C43/02C08L79/08C08L2201/08C08L2205/025
Inventor 孙小波王枫楚婷婷李媛媛李江斌冀恩光
Owner LUOYANG BEARING RES INST CO LTD