Self-lubricating sliding bearing material and its preparation method

A sliding bearing, self-lubricating technology, used in bearing components, shafts and bearings, mechanical equipment, etc., can solve problems such as peeling of adhesive layers, bearing failure, different proportions, etc.

Active Publication Date: 2008-02-20
COB PRECISION PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the special structure of this kind of material, the surface polymer self-lubricating layer is thin (0.02-0.04mm). As the wear depth decreases, the ratio of lubricant to copper powder is different, resulting in a change in the friction coefficient of the material.
For example, thrust bearings used in feed water pumps or submersible pumps, due to high propulsion, when the surface polymer lubricating layer is worn, because the bearing cannot form an effective lubricating transfer film in water, it will cause the bearing to fail rapidly, resulting in Occlusion phenomenon
[0003] Norton Pampus GmbH proposed a maintenance-free sliding bearing material (the patent number is USP5573846, and the patent name is "Polyfluorocarbon Coated Metal Bearing"). This material consists of a three-layer structure, the substrate is metal, and the surface lubrication modification layer is polymerized The matrix material is a mixture composed of lubricants or reinforcing fillers, and the middle layer is a polymer material mainly composed of ethylene-tetrafluoroethylene copolymer as a binder, but for different metal substrates, the bonding strength is different In addition, during the long-term use of the bearing, the accumulation of frictional heat will cause the bond strength of the middle layer to drop significantly, and when the bearing is subjected to a large tangential friction force, the bond layer will peel off

Method used

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  • Self-lubricating sliding bearing material and its preparation method
  • Self-lubricating sliding bearing material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Weigh according to the implementation formula Table 1, and mix evenly in a mechanical stirrer; after the surface of the low-carbon steel plate 2 with a thickness of 0.80 mm is sandblasted, phosphating is carried out. Spread the uniform mixture on the treated low-carbon steel plate 2 to form a self-lubricating sliding layer 1 (as shown in Figure 1), then dry it in a mesh belt drying furnace, and then rough roll it after drying. Carry out sintering and solidification in a sintering furnace, and then quickly roll it into the required bearing material with a thickness of 1.0mm.

Embodiment 2

[0023] Example 2: Weigh according to the implementation formula Table 2, and mix evenly in a mechanical stirrer; after sandblasting the surface of the stainless steel plate 2 with a thickness of 1.2mm, carry out pickling. Spread the uniform mixture on the treated stainless steel plate 2 to form a self-lubricating sliding layer 1 (as shown in Figure 1), then dry it in a mesh-belt drying furnace, rough roll after drying, and then sinter It is sintered and solidified in the furnace, and then quickly rolled into the required bearing material with a thickness of 1.5mm.

Embodiment 3

[0024] Example 3: Weigh according to the implementation formula Table 3, and mix evenly in a mechanical stirrer; after blasting the surface of the copper alloy plate 2 with a thickness of 1.6mm, carry out pickling. Spread the uniform mixture on the treated copper alloy plate 2 to form a self-lubricating sliding layer 1 (as shown in Figure 1), then dry it in a mesh-belt drying furnace, carry out rough rolling after drying, and then Carry out sintering and solidification in a sintering furnace, and then quickly roll it into the required bearing material with a thickness of 2.0mm.

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Abstract

The invention discloses a self-lubrication sliding bearing material and the preparation method, the self-lubrication sliding bearing material includes a self-lubrication sliding layer made of composite material which adopts the organic resin as the basis and a metal substrate, the sliding layer and the metal substrate are directly adhered together. During the preparation, the composite material for the self-lubrication sliding layer is blended proportionally and is laid on the metal sheet after being mixed mechanically, the surface of the metal sheet is treated, and then the metal sheet is sintered in a sintering furnace, then rolled immediately after the sintering process so that the surface coat is adhered on the metal substrate. The sliding bearing made of the material provided by the invention has the characteristics of higher carrying capacity and low friction and good wearing resistance, the metal substrate and the self-lubrication sliding layer can be stably adhered with each other, and is suitable for the dry friction and boundary or fluid friction conditions.

Description

technical field [0001] The invention relates to a bearing material and a preparation method thereof, in particular to a self-lubricating sliding bearing material and a preparation method thereof. Background technique [0002] British Glacier Metal Co. Ltd. invented self-lubricating three-layer composite bearings in the 1960s, commonly known as "DU" bearings, which are sintered porous tin bronze powder on steel or similar metal substrates, and will be made of polytetrafluoroethylene. Composite materials with ethylene as the main matrix are evenly mixed and spread on the surface. After rolling, they are sintered in a sintering furnace containing a protective atmosphere. This type of traditional self-lubricating bearing has been widely used in various mechanical transmission components. However, due to the special structure of this kind of material, the surface polymer self-lubricating layer is thin (0.02-0.04mm). As the wear depth decreases, the ratio of lubricant to copper po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/12
Inventor 王宏刚张国强简令奇杨生荣
Owner COB PRECISION PARTS
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