Material and construction of plain bearing bush

Bearings in the bearing, the part in direct contact with the shaft, bearing composite load bearing and shaft with relative motion. In order to reduce the friction and wear, various requirements are put forward on the material of the bearing bush. In addition to the small friction coefficient between the friction bearings and the wear resistance, the following points should also be satisfied:

1. Should have sufficient compressive strength, anti-fatigue strong automotive liner degrees and withstand the impact of the ability. Bearing alloy thickness (0.013-0.13) mm.

2. Good adhesion. When the load, high speed, bearing clearance is too small, the surface light JDB graphite copper sleeve cleanliness is not high, poor lubrication, we should carefully select the material match to prevent the adhesion of friction wear a glue.

3 with adaptability and ability to accommodate foreign bodies. Materials with low hardness, good plasticity and low modulus of elasticity have good adaptability and ability to contain foreign materials.

4. Corrosion resistance, low prices, sources enough. After the formation of gelatinous deposits by oxidation, corrosion of the bearing material.

First, the commonly used materials

Bearings and bearing linings commonly used materials are divided into two categories of metal materials and non-metallic materials.

metallic material:

Cast iron

Ordinary gray cast iron, wear-resistant cast iron, ductile iron

Suitable for low speed light load, or open drive bearings

Mechanism: flaky or spherical graphite material composition, covering the surface to form a lubricating graphite layer.

2 bearing alloy

ZChSnSb10-6 good corrosion resistance, anti-gluing ability, combined with the steel back jail, expensive, suitable for high-speed heavy load, such as rolling stock.

ZChPbSb16-16-2 anti-glue poor, poor thermal expansion, crisp suitable for medium-speed load.

This Babbitt wear resistance, anti-gluing, thermal conductivity, the most suitable bearing material.

Bronze

ZCuPb30 cast or sintered with steel backing attached to the inner surface of a bimetallic, anti-veneer performance

ZCuSn10-l anti-friction and wear resistance are good, the best bearing material, high speed heavy load

Such materials hardness and strength higher than the Babbitt, corrosion-resistant, but running poor, matching the journal require a higher hardness and finish, suitable for medium speed heavy load.

4. Aluminum - bimetallic

Low tin aluminum alloy, containing Sn0.5%

High tin aluminum alloy, with Sn20%, locomotive diesel engine

Such materials, high strength, corrosion resistance, good thermal conductivity.

5. Ceramic quality metal

Iron powder ten graphite powder or copper powder ten graphite powder → press forming → sintering to form pore structure, porosity 15 ~ 35% → dip cooking oil → oil bearing.

This bearing due to poor toughness only applies to smooth load and medium speed, for poor lubrication conditions.

Non-metallic materials:

Easy to run together wear debris, small affinity with the shaft jog small

1. Plastic: Bakelite, polyacryl (nylon), polytetrafluoroethylene

With greater compressive strength, anti-adhesion and abrasion resistance, good corrosion resistance, low coefficient of friction, the application is more extensive, but poor thermal conductivity, it is lubricated with water, such as roller presses, hydraulic presses

Rubber

Made of hardened rubber for shaft vibration, tilt, more dirty occasions, water lubrication

Second, the bearing structure

Integral

Overall casting

Split type

Hunan Jintai Hardware and Machinery Co.,Ltd. is a professional manufacturer on various kind of bearings over 15 years China factory.
We are making all kinds of slide bearings including DU PTFE composit bushing, DX POM composite bushing,bimetal bushing,wrapped bronze bushing, cast sliding bushings and wear plate bearing pad, sintered bronze bushing and sintering parts, ball transfer bearings, etc.
The shapes of bearings can be in sleeve, flanged, spherical, plate, washer, pad, ring, square etc.
Base materials in carbon steel, harden steel, iron, stainless steel, bronze, brass, copper, bronze-steel alloy.Lubricant materials in PTFE, teflon, POM, nylon, plastic, oil, graphite, grease, MoS2, etc.
Export to America,Canada,Brazil,Peru,Argentina,Chile,Paraguay,Europe,Finland,France,Germany,Italy,Spain,Sweden,
Britain,Estonia,Ukraine,Turkey,Austrial,Russia,Korea,Malaysia,Singapore,Thailand,Egypt,Kenya,Somali,
Congo,Zimbabwe,South Africa,etc.