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Method for preparing hydraulic geared pump friction pair

A technology of gear pump and friction pair, which is applied in the field of preparation of friction pair, can solve the problems of poor wear resistance and low strength of polytetrafluoroethylene, and achieves the effect of simple process

Inactive Publication Date: 2008-07-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low strength and poor wear resistance of the existing hydraulic gear pump friction pair polytetrafluoroethylene material, and to provide a preparation method for the hydraulic gear pump friction pair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Specific embodiment one: the preparation method of the hydraulic gear pump friction pair in the present embodiment is as follows: one, the carbon fiber of 4-5 parts, the molybdenum disulfide of 4-5 parts, the molybdenum disulfide of 4-5 parts Aluminum oxide and 85-88 parts of polytetrafluoroethylene are blended for 5-10 minutes with a mixer with a rotating speed of 1450r / min; 2. Put the mixture obtained in step 1 into a mold and pressurize to After holding the pressure at 60-100MPa for 10-20 minutes, sinter at 360-380°C for 10-12 hours and cool to room temperature.

specific Embodiment approach 2

[0011] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, 4.1-4.5 parts of carbon fiber, 4.1-4.5 parts of molybdenum disulfide, and 4.1-4.5 parts of aluminum oxide Mix with 85.5-86.5 parts of polytetrafluoroethylene. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step one, 4.6-4.9 parts of carbon fiber, 4.6-4.9 parts of molybdenum disulfide, and 4.6-4.9 parts of aluminum oxide Mix with 85.5-86.5 parts of polytetrafluoroethylene. Others are the same as in the first embodiment.

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Abstract

The invention discloses a preparation method of a hydraulic gear pump friction pair, which relates to the preparation method of the friction pair. The invention solves the problems that in the prior hydraulic gear pump friction pair, the fluon material strength is low, and the abrasive resistance is poor. The preparation method of the invention comprises the following steps: step one, 4-5 parts of carbon fibers, 4-5 parts of molybdenum disulfide, 4-5 parts of alumina and 85-88 parts of fluon are blended according to the volume parts; step two, the blending material obtained in the step one is put into a die, the pressure maintaining is performed for 10-20 minutes under the condition of room temperature of 60-100 MPa, and then the blending material is agglutinated for 10-12 hours under the condition of 360-380 DEG C and cooled to the room temperature. The friction coefficient of the friction pair prepared in the invention and the fluon is reduced by 0.03, the abrasion loss is reduced by 199 mg / 30 min, the extension rate is reduced by 178 percent, and the tensile strength is increased by 37 percent.

Description

technical field [0001] The invention relates to a preparation method of a friction pair. Background technique [0002] The hydraulic gear pump uses pure water as the working medium, which has the advantages of simple structure, energy saving and no pollution to the environment, but pure water has strong corrosion, rust and poor lubricity, and the friction pair in the gear works under high pressure and high speed working conditions , the material is required to have high wear resistance and corrosion resistance and limit PV value, the metal material has good mechanical properties, but the corrosion resistance is poor, and the friction coefficient when paired with the metal material is high (the friction coefficient of 440C steel and 440C steel is 0.32 ), the viscosity of water is low, the lubricity is poor, and the friction pair formed by metal and metal pairing will have direct contact. PTFE has excellent properties such as excellent high temperature resistance, chemical cor...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08K7/06C08K3/30C08K3/22B29C67/04B29C43/02B29C43/58F04C15/00
Inventor 姜继海王强
Owner HARBIN INST OF TECH