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A method for preparing a friction-reducing and oil-storage film on the surface of a rubber seal

A technology of rubber seals and membrane layers, applied in coating, metal material coating process, gaseous chemical plating, etc., can solve the problems of semi-automatic or automatic machinery and equipment blockage, structural damage of lubricating oil, equipment downtime and maintenance, etc. To achieve excellent protection, improve friction performance, reduce the effect of adhesive friction

Active Publication Date: 2021-04-13
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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  • A method for preparing a friction-reducing and oil-storage film on the surface of a rubber seal
  • A method for preparing a friction-reducing and oil-storage film on the surface of a rubber seal
  • A method for preparing a friction-reducing and oil-storage film on the surface of a rubber seal

Examples

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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 method for preparing a friction-reducing surface of a rubber seal and an oil storage film layer. The method comprises the following steps: (1) preparing a base material: mixing a rubber elastic body with a curing agent and casting it on a master mold; after baking, Peel off to form a uniform array of micro-pits to obtain the base material; (2) wash and dry the base material to obtain the processed base material; (3) cool the treated base material to room temperature and put it into a vacuum chamber and vacuumize it to 1.0×10 –2 Pa; (4) Introduce purified air into the vacuum chamber and use high-power pulsed ion source for air plasma bombardment; (5) Introduce Ar and H into the vacuum chamber 2 、CH 4 Gas, using a high-power pulsed ion source for ionization deposition, you can get a concave-convex and segmented diamond-like film on the bottom and side of the pit on the rubber surface, and take it out after the temperature in the vacuum chamber cools down to room temperature. The process of the invention is simple and easy for industrial application, and the obtained hard diamond-like carbon film has excellent 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 Patents(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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