In the moving parts, because of friction and the wear and tear parts for a long time, when the clearance between the shaft and hole grinding the connecting rod bushing to a certain amount of time must be replacement parts, so the designers choose in design of low hardness, good abrasion resistance material for collar or bushing, thus reducing shaft and seat wear and tear, when the bushing or replace bushing wear to a certain extent, so that we can save cost for replacement of the shaft or, in general, bushing and USES the interference fit, and with the shaft adopts clearance fit, because no matter how still can't avoid wear and tear, can prolong life, and is relatively easy to shaft parts processing;There are also some new designers don't like composite bushing huan designed so that no oil, think such is the increase in manufacturing cost, but after a period of time after use, repaired or modified by this method, but the accuracy of renovating the equipment of cause is reduced, the reason is very simple, secondary processing is no guarantee that the hole center location.
Bushing is used in low rotation speed instead of rolling bearings
Bushing is used in friction pairs as a bearing part
Bushing is used for mechanical parts, to achieve sealing, wear protection and other functions.Bushing is used in a wide range of industrial areas, many parts, such as valves, bearings and other components will use bushing.
The function of bushing
Bushing use flexibility is higher, it can play a lot of role, generally speaking, bushing is a kind of parts to protect the equipment.The use of bushing can reduce wear, vibration and noise of the equipment, and has anti-corrosion effect.The use of bushing can also facilitate the maintenance of mechanical equipment, simplify the structure of equipment and manufacturing process.
Bushing in the actual work of the role and its application environment and purpose have a lot to do with.In valve applications, bushing is arranged around the stem in the bonnet to reduce valve leakage and seal the valve.In the field of bearing application, the use of bushing can reduce the wear between the bearing and the shaft seat, and avoid the increase of clearance between the shaft and the hole.
Material of bushing
The material of the lining is mostly soft metal, rubber, nylon and non-metallic polymer, which is relatively soft and low in price and cost.The bushing can withstand vibration, friction and corrosion in various harsh working conditions to protect the wrapped parts, while the bushing itself can be easily replaced after damage, with low cost and good economy.
Bushing selection factors
Bushing wide range of use, more kinds, to choose the right bushing, we must consider its purpose, different working conditions to choose different types of bushing.The main conditions to be considered in the selection of bushing are pressure, velocity, product of pressure and velocity and load properties of bushing.In addition, whether the bushing has lubrication, lubrication state also determines its service effect and life.