Sliding bearing types in detail

Shaft and bearing clearance to surface contact, referred to as the sliding bearing. Because is surface contact so can withstand a larger force, shock resistance, simple structure and is widely used. Such as: the activity of excavator strange hand joints. Sliding bearing according to the stress direction can be divided into three kinds, respectively: 1, the radial sliding bearing radial sliding bearing stress direction is perpendicular to the axis of the center, in accordance with the form can be divided into three types: 1) Integral bearing: integral sliding bearing is a common and radial sliding bearing, bolt connected to the frame. Bearing hole inner pressure, on the top of the bearing seat is equipped with oil cup, oil hole shaft sleeve, the inner surface made of anti-friction material bearing shell ( Or collar) Open axial oil groove to assign lubricating oil. As shown in figure 1, figure 1 overall bearing 2) , involution bearing: this kind of bearing installation and disassembly is very convenient, and the price is cheap, mechanical application is very extensive. Such as various types of internal combustion engine crank bearing. As shown in figure 2, figure 2 involution bearing 3) Four sets of bearings, also known as the four bearings, used in large vehicles, such as earthquake machine, vibration machine spindle bearings, as shown in figure 3, figure 3 four sets of bearing most of the sliding bearing material is cast iron and cast steel. Because of the quality of a material is hard, easy create journal wear, so often in between shaft and bearing bushing, as shown in figure 4. This kind of sleeve material is given priority to with bronze, white metal and babbitt alloy. Figure 4 2, sliding thrust bearing liner sliding thrust bearing load and axial parallel, in addition to the rotation of the support part, and can prevent movement along the axis direction. Can be divided into four kinds: 1) And thrust bearing ring: is divided into: ( 1) Monocyclic thrust bearing, as shown in figure 5, a) As shown in the lantern ring bearings. As shown in figure 5, b) Shown as single thrust bearing, it can be subject to both sides of the axial thrust. ( 2) Polycyclic thrust bearing, as shown in figure 5, c) Shown below. This kind of shaft can be subject to both sides, the axial thrust of high-speed and heavy load. Figure 5 ring thrust bearing 2) Class bearings: also called pivot bearing, is installed on the axis side sliding thrust bearing, so it is also referred to as the base type thrust bearings. As shown in figure 6 ( a) ( b) Shown below. Figure 6 class bearing 3) Hydrodynamic lubrication bearing, friction between shaft and bearing surface into a inclined plane or tilting lumps, as shown in figure 7. In each inclined plane or rotated a hydrodynamic oil film layer is formed on the block, the shaft and bearing contact. As shown in figure 8 for mirra ginsburg thrust bearings. Figure 7 hydrodynamic lubrication bearing figure 8 mirra ginsburg thrust bearing (4) Hydrostatic bearing: when the load bearing unit is too big, established by a static starting impossible oil film, so you must use a hydrostatic bearing. Fluid ( Oil) Sent by pump pressure between the two parts, in order to offer to maintain lubrication during operation. Because the fluid is supplied by the outside world, so also known as external pressure bearing, as shown in figure 9. If the pump oil pressure to the pressure, known as the static pressure air bearing, as shown in figure 10 for air bearing. Figure 9 hydrostatic bearing figure 10 air bearing 3, 1) special sliding bearing Porous bearings: also called oil-retaining bearing, break made method of crack in powder metallurgy. Generally applicable to light load of radial bearing. 2) Oil-free bearings: excellent abrasion resistance, suitable for light load and there shall be no pollution of food processing machinery, such as lung bearing resistance.