slide bearing is a bearing operating under sliding friction. It has many advantages, such as: smooth, reliable, no noise. Under conditions of liquid lubrication, the lubricating oil is separated from the sliding surface not in direct contact, thus reducing friction and wear surface, a film having a certain vibration absorption ability. But at the start frictional resistance is relatively large. Plain bearing applications generally at low speed heavy-duty working conditions, or is difficult to maintain the operation of the site maintenance and filling oil. Shaft bearing portion is referred to as journal and the journal bearing shell parts are referred to match. Antifriction bearing bush is a layer of material is cast layer of the material layer in order to improve the friction properties of the surface of the pad on its inner surface. Pad and split into a monolithic structure. The bearing pad and lining materials referred to as sliding bearing material.
a sliding bearing type
by the pad structure: The circular bearings, elliptic bearings, three oil leaves the bearings, a stepped surface of the bearing, the tilting pad bearing and the foil bearing, etc.
[ 123] divided by type of lubricant: oil lubricated bearings, grease lubricated bearings, water lubricated bearing, a gas bearing, solid lubricated bearings, a magnetic fluid bearing and the magnetic bearing
direction to withstand the load point: radially (radial) and thrust plain bearing (axial) slide bearing
divided by the pad material: bearing bronze, cast iron, plastic bearings, jewel bearings, powder metallurgy bearings, self-lubricating bearings and oil bearings
points lubricating film thickness: thick and thin film lubrication bearings lubricated bearings
2 pad structure
bush double the metal bush and tri-metal bush, in order to improve the frictional properties of the surface of the pad, its inner diameter surface often cast in one or two layers of antifriction material, commonly referred to as a bearing bush.
3. It is noted that design matters
1, should be non-bearing surface of the oil into the bearing area.
2. The tile oil, oil groove open seams.
3, not to open a full tank in the middle of the bearing ring.
4, to make the film smoothly into the friction surface.
5, to make the oil ring to the oil sufficiently reliable.
6, to prevent the oil film cutting corners and sharp edges occur.
7, filling hole not blocked.
8, do not form an oil flow region. .
4 non-metallic sliding bearings and metal sliding bearing distinction
1, plastic bearing is not running any noise, with some vibration absorbing function;
2, the manufacturing cost of plastic bearings is lower than metal; uses a plastic bearing made of an injection molding process is more suitable for mass production;
3, the bearings are integrally lubricated plastic material, long life; the metal class bEARING only the surface layer of 0.003mm PTFE, when this thin layer will complete friction, ended life;
4, plastic bearings does not occur and resistance to rusting corrosion, rust and metal bearing can not be used in the liquid chemical;
5, bearing plastic mass lighter than metal, which is more suitable for modern lightweight design trends.