Sliding bearing information about
Shaft bearinPlastic bearinggs and bearing load bearing sliding motion called sliding bearing。 According to the two relative motion sliding bearing surface film formation principle different。 Can be divided into hydrodynamic lubrication bearings (also known as dynamic pressure bearing) and the hydrostatic bearing (also known as the hydrostatic bearing)。 General discussion of the hydrodynamic lubrication of bearings， by the relative motion of the shaft and bearing oil into between the two surfaces to form a sufficient pressure membrane， the two surfaces separated， in order to withstand the load。
Commonly used bearing material is divided into two types of metallic materials and nonmetallic materials。
(1) cast iron。 Ordinary gray cast iron or additions of nickel， chromium， titanium alloy composition of the wear of gray cast iron or ductile iron， can be used for light load low-speed bearing materials。 Flake or spheroidal graphite components in the material covering the surface of these materials， we can form a layer of graphite lubricant layer。 Surface of the wear resistant cast iron phosphate treatment， can be formed of a porous thin layer helps to improve the wear resistance。
(2) bearing alloy。 (Usually babbitt or white alloy) bearing alloy divided into two categories: First， to the tin as the basic ingredients formed by adding an appropriate amount of antimony and copper， called tin-based bearing alloy， such as ZChSnSb11-6； the other is lead as the basic ingredients， adding the right amount of tin and antimony， called lead-based bearing alloy， such as ZCnPbSn16-16。
(3) copper alloy。 Copper alloys can be divided into: cast lead bronze； zinc and lead bronze casting of tin； cast Phosphor Bronze； Aluminum Bronze； cast brass。
(4) aluminum alloy。 It is divided into two categories: low tin alloy， tin is about 6。5%； high tin alloy， tin of 20%。
(5) ceramic metal。 This is by the suppression of different metal powders， sintered bush material。 This material is porous structure， pore about 10% of the volume of ~ 35%， and soak in the hot oil before use， so that the pores filled with lubricating oil， it has self-lubricating， also known as oil bearing。
(6) graphite。 Graphite bearing can be pure graphite， and its intensity is low； plastic， resinslide bearing， silver， copper， or Pap alloy etc。 can be added to increase strength and improve adaptability。
(7) Other non-metallic materials。
1) rubber。 Mainly used for water as lubricant dirty place。
2) phenolic tape。 It is a layered structure of the material of cotton cloth， asbestos cloth， or other man-made fiber fabric bonded together with phenolic resin。
3) nylon。 For low load bearing。 |
