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Oil seal coating agent, spraying method thereof and oil seal prepared therefrom

A coating agent and oil seal technology, applied in the field of oil seal coating agent, can solve the problems of affecting the sealing performance, oil seal service life, weak adhesion and high price

Inactive Publication Date: 2018-09-28
广东天诚密封件股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, it is generally used to add friction reducer to the fluororubber compound, or to carry out surface treatment on the lip of the oil seal, including pasting a polytetrafluoroethylene film on the surface of the lip, which improves the friction factor and wear resistance of the lip of the oil seal to a certain extent. , but there are problems such as poor compatibility of fluororubber, packing and PTFE, weak bonding, etc., which affect the sealing performance and the service life of the oil seal
Moreover, products in related fields are still in the application and development stage in China, and coating materials mainly rely on imports, and the price is relatively high

Method used

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  • Oil seal coating agent, spraying method thereof and oil seal prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, an oil seal coating agent, is composed of A component, B component, and C component in a mass ratio of 100:7.5:100, wherein, A component is composed of 35wt% graphite powder with a particle size of 20 μm, Composed of 7wt% graphite powder with a particle size of 2μm, 13wt% molybdenum disulfide, and 45wt% polytetrafluoroethylene; component B is a water-based curing agent, 1,6-diisocyanate blocked by polyethylene glycol monomethyl ether Acidohexane homopolymer 96wt% and 1,6-diisocyanatohexane 4wt%; group C consists of polyacrylate XT-1100 40wt% and water-based epoxy resin 60wt%, polyacrylate XT- 1100 is used as a polymer surfactant. First, put it on a three-roller mill and grind it for 2 to 3 times to obtain a batch material. Add the formulated amount of water-based epoxy resin, stir it for 30 minutes by magnetic force, and then ultrasonically disperse it. Mix for 30 minutes to prepare component C; before use, mix component A and component C in proportion, ad...

Embodiment 2

[0015] Embodiment 2, a kind of spraying method of oil seal coating agent, comprises the following steps:

[0016] (1) Coating agent formulation: mix components A, B, and C described in Example 1 in a mass ratio of 100:7.5:100, then magnetically stir, ultrasonically disperse, and concentrate to prepare Coating agent, wherein, the diluent of concentration deployment is distilled water;

[0017] (2) Spraying: Heat treatment on the oil seal assembly that has been activated by plasma, and keep the temperature of the oil seal base material at 95°C, put the evenly mixed coating agent into the spraying equipment, and spray it on the activated fluororubber oil seal, The coating agent is atomized into fine particles through the spray gun and the high-speed air flow of compressed air, which is directly sprayed onto the surface of the main lip and dust-proof lip of the oil seal to form a coating with a thickness of 30 μm;

[0018] (3) Coating curing: bake the coated oil seal in a drying ...

Embodiment 3

[0019] Embodiment 3, with reference to figure 1 , a coating oil seal, comprising a main lip 2 and a dustproof lip 3, on the surface of the main lip 2 and dustproof lip 3, the coating agent described in Example 1 and the spraying method described in Example 2 are used to coat Overlay coating 4, the thickness of the coating is about 30 μm.

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Abstract

The invention relates to an oil seal coating agent, a spraying method thereof and an oil seal prepared therefrom. The oil seal coating agent is composed of a component A, a component B and a componentC according to a mass proportion of 100:7-8:100, wherein the component A is composed of graphite powder, molybdenum disulfide and polytef, the component B is waterborne curing agent and is composed of homopolymer of polyethylene glycol monomethyl ether terminated 1, 6-diisocyanate hexane and 1, 6-diisocyanyl hexane, and the component C is composed of polyacrylate salt and waterborne epoxy resin.The coating agent is used for being coated in oil seal main lip and dustproof lip areas, and coating thickness is about 30um. When the oil seal works, part of the coating agent is transferred from theoil seal to the surface of a shaft, a coating film is promoted to closely cover the surface of the shaft under action of contact force between an oil seal lip opening and the shaft at the same time to enable the shaft to be smoother so as to play a role in lowering friction coefficient, and low and stable friction force and friction torque are provided in the whole life cycle of the oil seal.

Description

technical field [0001] The invention relates to an oil seal coating agent, a spraying method of the coating agent and an oil seal prepared therefrom. Background technique [0002] The current domestic and foreign research on high-performance low-friction and wear oil seals mainly includes: 1. Reduce the holding force of the oil seal to the shaft from the structural design. For example, the Tecon Fanli PDR series of the Swedish Treble Company, the PS-SEAL series of the American Garrek Company, the one-time forming "anti-rotation thread groove" inner lip hydrodynamic oil seal of the EU TDM-SEALS Group, and the German Keluke Company. The pneumatic lubricating surface contact seal ring of Debao Group has been commercialized abroad and used in high-end fields such as aero engines, automobile engines and screw air compressors. However, due to limitations in technology, process and cost, the corresponding products have not yet been mass-produced in China. Second, reduce the fricti...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D133/02C09D127/18C09D7/61B05D3/14B05D1/02B05D7/24F16J15/3232
CPCB05D1/02B05D3/142B05D7/24B05D2506/15C08K2003/3009C08L2205/035C09D7/61C09D163/00F16J15/3232C08L33/02C08L27/18C08L71/02C08K3/04C08K3/30
Inventor 王慕康何洪吴克胜谢宏波
Owner 广东天诚密封件股份有限公司
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