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A kind of low oil rate microporous core valve material and its preparation method

A core valve, microporous technology, applied in the field of bearing materials, can solve the problems of low oil output rate, poor machinability and stability, and achieve the effect of optimizing oil supply, low porosity and low permeability

Active Publication Date: 2021-06-01
LUOYANG BEARING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a microporous core valve material with low oil output rate, so as to solve the problems of poor processability and stability existing in core valve materials

Method used

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  • A kind of low oil rate microporous core valve material and its preparation method
  • A kind of low oil rate microporous core valve material and its preparation method
  • A kind of low oil rate microporous core valve material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The low oil rate microporous core valve material of this embodiment is made of the following raw materials in weight percentage: bisether anhydride type polyimide molding powder 40%, homoanhydride type polyimide molding powder 45%, PTFE molding powder 15%.

[0023] The preparation method of the low oil extraction rate microporous core valve material of this embodiment comprises the following steps:

[0024] 1) Put bisether anhydride type polyimide molding powder, homoanhydride type polyimide molding powder, and polytetrafluoroethylene molding powder in a drying oven for drying treatment, and the thickness of the raw material powder should not exceed 30mm. The drying temperatures of the three raw materials are 150°C, 240°C, and 100°C respectively. After drying for 2 hours, take it out and cool it to room temperature. Sieve, sieve the polytetrafluoroethylene molding powder through 100 mesh, and store it in a dry cabinet in an independent seal for future use.

[0025] 2)...

Embodiment 2

[0031] The low oil rate microporous core valve material of this embodiment has the same specifications as in Example 1, and is made of the following raw materials in percentage by weight: bisether anhydride type polyimide molding powder 40%, homoanhydride type polyimide Amine molding powder 40%, PTFE molding powder 20%.

[0032] For the preparation method of the low oil extraction rate microporous core valve material of this embodiment, the preparation steps can refer to the embodiment 1, and the difference lies only in the step 3).

[0033]Set core valve material diameter D=3.0mm, height H=12.0mm, porosity 6%, can set core valve material diameter D'=D+3mm=6mm, height H'=H+ 4mm=16mm, from the theoretical density of the qualified molding material, calculate the density of the core valve material under the porosity, and then combine the set volume of the core valve material to calculate the feeding amount of the qualified molding material, specifically: The theory of synthetic m...

Embodiment 3

[0036] The low oil rate microporous core valve material of this embodiment has the same specifications as in Example 1, and is made of the following raw materials in percentage by weight: bisether anhydride type polyimide molding powder 45%, homoanhydride type polyimide Amine molding powder 50%, polytetrafluoroethylene molding powder 5%.

[0037] For the preparation method of the low oil extraction rate microporous core valve material of this embodiment, the preparation steps can refer to the embodiment 1, and the difference lies only in the step 3).

[0038] Set core valve material diameter D=3.0mm, height H=12.0mm, porosity 9%, can set core valve material diameter D'=D+3mm=6mm, height H'=H+ 4mm=16mm, from the theoretical density of the qualified molding material, calculate the density of the core valve material under the porosity, and then combine the set volume of the core valve material to calculate the feeding amount of the qualified molding material, specifically: The th...

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Abstract

The invention relates to a microporous core valve material with low oil output rate and a preparation method thereof. The core valve material is made of the following raw materials in weight percentage: 40-60% of bis-ether anhydride polyimide, 20-50% of homoanhydride polyimide, and 10-20% of polytetrafluoroethylene. The low oil rate microporous core valve material provided by the present invention is made of bisether anhydride polyimide, homoanhydride polyimide and polytetrafluoroethylene according to a certain ratio, and the low porosity of the core valve material is satisfied. On the basis of high rate and low permeability, it has high tensile strength, high hardness and good processability. The selection of each raw material is reasonable and synergistic, the pore structure of the core valve material is stable and easy to control, and the batch stability of the production of the core valve material is improved.

Description

technical field [0001] The invention belongs to the technical field of bearing materials, and in particular relates to a microporous core valve material with low oil output rate and a preparation method thereof. Background technique [0002] With the continuous extension of the life of the bearing assembly, the amount of lubricating oil contained in the porous cage cannot meet the demand. An oil supply cavity storing a certain amount of lubricating oil is designed inside the component. The lubricating oil in the oil supply cavity passes through the oil passage to the The bearing needs to be lubricated and transported. Generally, the oil passage is a round hole, the core valve material is arranged in the oil passage and cooperates with the oil passage, and the core valve material has a cylindrical structure. The core valve material requires a very small oil output rate, and should also have a small pore size, low porosity, low permeability and good machinability, which is ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08L27/18
CPCC08L79/08C08L2205/025C08L2205/03C08L27/18
Inventor 孙小波楚婷婷王枫李媛媛宁仲张亭亭李江斌
Owner LUOYANG BEARING RES INST CO LTD