Preparation method of surface anti-friction and oil storage membrane layer of rubber sealing part

A technology of rubber seals and film layers, which is applied in the direction of coating, metal material coating process, gaseous chemical plating, etc., can solve the problems of semi-automatic or automatic mechanical equipment blockage, lubricating oil structure damage, equipment downtime and maintenance, etc. Achieve protection, improve friction performance, and improve oil storage function

Active Publication Date: 2019-03-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is relatively easy and cheap to apply lubricant to the seal for lubrication, after a short period of time, the lubricant will flow to the bottom due to its own gravity, and there is almost no lubricant on the top of the seal, leaving the bottom. If the oil is not cleaned in time, the semi-automatic or automatic mechanical equipment will be blocked, which will cause the equipment to be shut down for maintenance
In addition, due to the influence of heat and medium on the lubricating oil, the base oil and thickener are oxidized, resulting in the destruction of the lubricating oil structure, resulting in the failure of the lubricating oil

Method used

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  • Preparation method of surface anti-friction and oil storage membrane layer of rubber sealing part
  • Preparation method of surface anti-friction and oil storage membrane layer of rubber sealing part
  • Preparation method of surface anti-friction and oil storage membrane layer of rubber sealing part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 A method for preparing a friction-reducing and oil-storage film on the surface of a rubber seal, comprising the following steps:

[0038] ⑴ Preparation of base material:

[0039]Grind the nitrile rubber and mix the curing agent sulfur with a weight ratio of 10:1 (kg / kg), cast it on the mother plate mold and bake it at 70°C for 1 hour. Move, and the baking temperature is constant to prevent the uneven physical properties of the rubber matrix itself. The rubber elastomer was then peeled off from the master mold, at which time, it was cured in the master mold to form a uniform array of microdimples with a spacing ratio of 1 cm (see figure 1 ), and the diameter of each micro-pit is 4 μm, and the height is 5 μm, that is, the base material. Air dry naturally under atmospheric conditions.

[0040] Among them: the surface finish of nitrile rubber is Ra<500nm, and there are no excessive impurity particles on the surface.

[0041] The surface of the motherboard mol...

Embodiment 2

[0050] Example 2 A method for preparing a friction-reducing surface of a rubber seal and an oil storage film, comprising the following steps:

[0051] (1) Prepare base material with embodiment 1.

[0052] Among them: rubber elastomer refers to ethylene-propylene rubber, its surface roughness Ra<500nm, and there are no excessive impurity particles on the surface.

[0053] ⑵ ~ ⑶ with embodiment 1.

[0054] ⑷Introduce purified air with a flow rate of 300 sccm into the vacuum chamber to prevent floating dust in the air from entering the chamber. Then use the high-power pulsed ion source to carry out air plasma bombardment. At this time, the air plasma activates the rubber surface to generate a large number of free radicals, which can effectively remove the oxide layer and dirt on the rubber subsurface.

[0055] Among them: air purification uses an air purifier to remove floating dust in the air.

[0056] The conditions for air plasma bombardment are that the air pressure in the...

Embodiment 3

[0059] Embodiment 3 A method for preparing a friction-reducing and oil-storage film on the surface of a rubber seal, comprising the following steps:

[0060] (1) Prepare base material with embodiment 1.

[0061] Among them: rubber elastic body refers to fluorine rubber or silicone rubber, the surface roughness Ra<500nm, and there are no excessive impurity particles on the surface.

[0062] The surface of the motherboard mold is coated with a hydrophobic, slippery coating to prevent the rubber from sticking to the surface of the motherboard. The edge curvature of the pitted area of ​​the surface does not exceed 1 μm.

[0063] ⑵ ~ ⑶ with embodiment 1.

[0064] ⑷Introduce purified air with a flow rate of 300 sccm into the vacuum chamber to prevent floating dust in the air from entering the chamber. Then use the high-power pulsed ion source to carry out air plasma bombardment. At this time, the air plasma activates the rubber surface to generate a large number of free radicals,...

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Abstract

The invention relates to a preparation method of a surface anti-friction and oil storage membrane layer of a rubber sealing part. The method comprises the following steps: (1) preparing a base material: after mixing a rubber elastomer and a curing agent, pouring a mixture on a mother board mold; baking and peeling to form a uniform micro-pit array, so as to obtain the base material; (2) washing and drying the base material to obtain a treated base material; (3) after cooling the treated base material to room temperature, putting the treated base material into a vacuum chamber and vacuumizing until the pressure is 1.0*10<-2> Pa; (4) introducing purified air into the vacuum chamber and carrying out air plasma bombardment by utilizing a high-power pulse ion source; (5) introducing Ar, H2 andCH4 gas into the vacuum chamber and carrying out ionization deposition by utilizing the high-power pulse ion source, so as to obtain uneven and partitioned diamond-like membranes at the bottoms and side parts of pits on the surface of rubber; after cooling the temperature of the vacuum chamber to room temperature, taking out the diamond-like membranes. The preparation method has the advantages ofsimple technology and easiness for industrial application; the obtained hard diamond-like membranes have good performance.

Description

technical field [0001] The invention relates to the technical field of dynamic sealing parts of various mechanical equipment, in particular to a method for preparing a friction-reducing surface of a rubber seal and an oil storage film layer. Background technique [0002] Rubber seals are important industrial foundations for all means of transportation, mechanical equipment and new industries. They can provide sealing functions at specified temperatures, pressures and in different liquid and gaseous media. With the rapid development of modern industrial production, the requirements for the sealing materials used are getting higher and higher. For example, rubber seals work under the conditions of periodic frictional motion and small volume. Harsh environmental conditions will easily promote poor sealing and seal failure of seals, and the resulting economic losses, environmental pollution and social impact will be inestimable. For example, the combustion and explosion acciden...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/06C08J7/00C08L9/02C08L23/16C08L27/12C08L83/04C23C16/26C23C16/02C23C16/515
CPCC08J7/00C08J7/06C08J2309/02C08J2323/16C08J2327/12C08J2383/04C23C16/0245C23C16/26C23C16/515
Inventor 张俊彦白常宁安璐璐高凯雄强力张斌
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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