Bushings and bushings are available in different models depending on the operating conditions. The most important conditions are: pressure, speed, pressure velocity product, lubrication state, and load properties. The requirements for the rotary and stainless steel coiled bushings are different from those of the axial sliding. There is also a large difference in the performance of the lubricating oil. The speed and pressure basically determine the life of the bushing.
In the moving parts, the wear of the parts is caused by long-term friction. When the gap between the shaft and the hole is worn to a certain extent, the parts must be replaced. Therefore, the designer selects the hardness and the resistance at the time of design. The more abrasive material is the bushing or bushing, which can reduce the wear of the shaft and the seat. When the bushing or bushing is worn to a certain extent for replacement, the cost of replacing the shaft or the seat can be saved. Generally speaking, The bushing and the seat adopt an interference fit, and the shaft is matched with the shaft, because the wear can not be avoided anyway, and the life can only be extended, and the shaft parts are relatively easy to process; some new designers do not like it. The oil-free composite bushing is designed in such a way that it is costly at the time of manufacture. However, after a period of use, the repair is still carried out according to this method, but the modification is likely to cause the accuracy of the device to be reduced. The reason is very simple. The secondary machining is unable to guarantee the position of the center of the seat hole.
Bushings are used in low speed instead of rolling bearings
The bushing is applied to the friction pair to become the grinding member
The bushing is a fitting for the purpose of sealing, wear protection and the like outside the mechanical parts. Bushings are used in a wide range of applications, and many components in the industrial field, such as valves, bearings, etc., use bushings.
The role of the bushing
Bushings have a high degree of flexibility in use, and they can do a lot of work. In general, bushings are a type of component that protects equipment. The use of bushings reduces equipment wear, vibration and noise, and has an anti-corrosion effect. The use of bushings also facilitates the maintenance of mechanical equipment, simplifies the structure and manufacturing process of the equipment.
The role of the bushing in actual work has a lot to do with its application environment and purpose. In the field of valve applications, the bushing is placed inside the valve cover to cover the valve stem to reduce leakage of the valve and achieve sealing. In the field of bearing applications, the use of bushings can reduce the wear between the bearing and the shaft seat, and avoid the increase of the gap between the shaft and the hole.
Bushing material
The material of the bushing is mostly soft metal, rubber, nylon and non-metal polymer. These materials are relatively soft in texture and low in cost. The bushing is subjected to vibration, friction and corrosion in a variety of harsh working environments to protect the wrapped components, while the bushing itself is easily replaced, cost-effective and economical.
Bushing selection factor
Bushings have a wide range of applications and a wide variety of types. To choose a suitable bushing, it is necessary to consider its purpose of use. Different types of bushings are selected for different working conditions. The main considerations in bushing selection are the pressure, speed, pressure velocity product and load characteristics that the bushing is subject to. In addition, whether the bushing is lubricated or lubricated also determines its use effect and life.
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