The structure of the bearing and sliding bearing material

Bearing shell structure commonly used shell has integrated and split two kinds of structure. One-piece bearing the integral bearing shell, integral bearing shell is also known as collar, as shown in figure 12 - 6 a. Split bearing adopts the split bearing shell, as shown in figure 12 - 6 b. Bearing shell can be made of a material can also be in high strength material bearing substrate bearing alloy casting a layer or two layer as a bearing bush, called bimetallic bearing shell or three metal bearing shell. In order to make the bearing bush and bush matrix combined with the strong, can make groove in the bearing substrate surface or flank, as shown in figure 12 - 7. In order to make the lubricating oil can uniform flow to the whole on the surface of bearing, bearing bush will leave oil hole and the oil groove, general oil and oil hole groove should be open in the bearing section, to ensure the continuity of the oil film bearing area. Figure 12 - 8 for several common forms of oil groove. Bearing material bearing refers to the direct contact with journal bearing or bearing liner material. The main requirements to its material is: ( 1) Has enough compressive strength, fatigue resistance and impact resistance. ( 2) Good antifriction and wear resistance and running-in, adhesive wear and abrasive wear resistance is better. ( 3) Good compliance and embedded hidden, with compensation of the error and other geometric errors and the ability to accommodate hard dust grains. ( 4) Has a good manufacturability, thermal conductivity and corrosion resistance, etc. But any kind of material can't have a combination of the above performance, so design according to the specific working conditions, according to the main performance to select bearing materials. Commonly used bearing or bearing liner material and its properties are shown in table 12 - 1. Table 12 - 1 common metal bearing shell material and performance bearing maximum allowable highest working temperature oC minimum shaft neck hardness HBS performance comparison for note [ p] MPa[ v] m/s[ pv] MPa, M/s bit viscosity suitable embedded should hide sexual resistance corrosion fatigue strength plastic metal ZSnSb11Cu6ZSnSb8Cu4 work smoothly under the 1501501115 used in high speed, heavy loads of important bearing fatigue under variable load, the price is expensive. 258020 impact load 206015 lead ZPbSb16Sn16Cu21512101501501135 base bearing alloy used in medium, medium load bearing, unfavorable impact load by significantly. Can be used as a substitute ZPbSb15Sn5Cu3585 tin antimony bearing alloy tin bronze ZCuSn10P11510152802003511 for medium speed, overload and the variable load bearing ZCuSn5Pb5Zn58315 used for medium speed, medium load bearing aluminum bronze ZCuAl10Fe3154122802005552 used for lubrication good low-speed, heavy-duty bearing in addition to the above several kinds of metal material, also can use other metal and non-metal materials, such as brass, cast iron, plastic, rubber, powder metallurgy as bearing shell material, etc.