Introduction of Hydraulic Bushings

Introduction of Bushings

Hydraulic bushings and hydraulic pumps, hydraulic motors, etc. are all hydraulic parts. In the moving parts, because of long-term friction and wear of parts, when the shaft and hole clearance wear to a certain degree must be replaced parts, so the designer in the design of the lower hardness, wear resistance of the material for the shaft sleeve or bushing, so as to reduce the wear of the shaft and seat, when the sleeve or bushing wear to a certain degree to replace, so that you can save due to the cost of replacing the shaft or seat.

Generally speaking, the bushing and seat using interference fit, and with the shaft using clearance fit, because no matter what or can not avoid the wear, can only extend the life, and shaft parts are relatively easy to process; there are some new designers do not like this design, that this is in the manufacture of increased costs, but after a period of use, maintenance or according to this method of transformation, but the transformation is easy The reason is simple, the secondary processing is unable to guarantee the position of the center of the seat hole to supplement some, the sleeve in some lower speed, higher radial load and higher clearance requirements (such as camshaft) used to replace the rolling bearing (in fact, the sleeve is also considered a sliding bearing), the material requirements of low hardness and wear resistance, the bore of the sleeve by grinding and scraping, can achieve a higher with the accuracy, the inner wall must There must be lubricating oil groove, lubrication of the sleeve is very important, dry grinding, the shaft and sleeve will soon be scrapped. Here it is recommended to scrape the inner bore wall of the bushings during installation so that many small pits can be left to enhance the lubrication of the bushings and sleeves are selected according to the different mining conditions of different models. The most important conditions are: pressure, speed, pressure-velocity product, lubrication state, and load nature. The bushings fast and easy to U automation selection has included.

Wrapped around the valve stem, worn, can be easily replaced. If you don't use the bushing, when it wears out, the replacement is the parts. So the change is to replace the bushing (when designed, the bushing hardness is reduced so that it becomes a wear-bearing part in the frictional vice). Because it is easy to process, the replacement cost is low, and it is also easy to replace.

Bushing Features

Low frictional resistance: The steel ball can be guided correctly by the cage, and the stable linear motion can be performed with very low frictional resistance.
Stainless steel system: Stainless steel series are also available, suitable for applications requiring corrosion resistance.
Compact design: Extremely small size can be designed in compact machinery and equipment.
Variety: In addition to the standard type, there is a series of high rigidity long type that can be selected according to the application.

The Role of the Bushing

The use of bushings is more flexible and it can play a lot of roles. In general, bushings are a type of component that protects the equipment. The use of bushings can reduce the wear, vibration and noise of the equipment, and have the effect of corrosion prevention. The use of bushings can also facilitate the maintenance of machinery and equipment, simplify the structure of equipment and manufacturing process.

The role played by the bushing in the actual work and its application environment and purpose have a lot to do with. In valve applications, bushings are installed in the valve cover and sleeve the valve stem to reduce valve leakage and achieve sealing. In bearing applications, bushings are used to reduce wear between the bearing and the shaft seat and to avoid increased clearance between the shaft and the bore.

Material of Bushing

The material of the bushing is mostly soft metal, rubber, nylon and non-metallic polymer, etc. These materials are relatively soft and low cost. In a variety of harsh working environment bushings withstand vibration, friction and corrosion to protect the wrapped parts, while the bushings themselves are easy to replace after damage, low cost and good economy.