As an important mechanical part, metal sliding bearings are widely used in various fields, including industrial manufacturing, automotive, metallurgy, aerospace, etc. It has the characteristics of high strength, high stiffness, good lubricating properties, adaptability to high temperature and high speed working conditions, good wear resistance, and easy manufacturing and maintenance. It has a wide range of applications in various fields and plays an important role in the normal operation and performance of machinery and equipment.
Composition of metal plain bearings
The composition of metal plain bearings mainly includes three parts: journal, bearing pad and bearing lining.
Journal: The journal is the core part of the plain bearing, which is usually the main shaft in the mechanical drive system. The journal has a cylindrical shape and is used in conjunction with the bearings. Its main role is to transmit and support the force, so that the bearing can withstand the axial and radial loads in the mechanical system. The machining accuracy and surface quality of the journal have an important impact on the running stability and service life of the plain bearing.
Bearings: Bearings are components that are in direct contact with the journal and are part of the plain bearing. The shape and size of the pads correspond to the journal and can be divided into two types: fixed pads and movable pads. Fixed bearings are generally fixed to the body, while movable bearings can be moved relative to the journal. The material of the bearing is usually a metal material, such as copper alloy or aluminum alloy, which needs to be surface treated before use to improve its wear resistance and fatigue resistance.
Bearing lining: A bearing lining is a special layer of material located on the inner surface of the bearing pad to improve the friction properties of the bearing surface and reduce the coefficient of friction. Common bearing lining materials include white metal, multilayer composite materials and PTFE. The selection of bearing linings takes into account factors such as working conditions, load and speed to ensure that the plain bearings have good friction properties and wear resistance.
Journals, pads and bearing linings work together to support and reduce friction, and are an indispensable and important part of a mechanical drive system. Through the rational selection and use of metal plain bearings, the reliability and life of mechanical equipment can be improved, and more stable and efficient operation can be achieved.
Types of metal plain bearings
According to different classification standards, metal plain bearings can be divided into the following types:
Thrust bearings: Thrust bearings are mainly used to bear loads perpendicular to the axial direction, such as impellers in motors, pumps and other equipment.
Radial bearings: Radial bearings are mainly used to withstand forces perpendicular to the axis and acting on the axis, such as connecting rod bearings in automobile engines.
Self-lubricating bearing: Self-lubricating bearing is a special type of sliding bearing, which has a built-in lubricating material, which can release lubricant by itself during friction, reduce the coefficient of friction, and prolong the service life of the bearing. Self-lubricating bearings are widely used in high temperatures, high speeds and occasions where regular lubrication is not possible.
Fluid-lubricated bearings: Fluid-lubricated bearings reduce the coefficient of friction and wear by forming a lubricating film between the bearings. Hydrolubricated bearings can be further divided into hydrostatic lubricated bearings and hydrodynamic lubricated bearings.
Rolling bearings: Rolling bearings are a type of bearing that corresponds to plain bearings and transmits loads by rolling balls or rollers between the inner and outer rings. Rolling bearings have the advantages of low friction, high precision, high stiffness and high speed, and are widely used in precision machinery and high-speed equipment.
Zhejiang Changsheng Plastic Bearing Technology Co., Ltd. is committed to R&D, production and sales of engineering plastic bearings, self-lubricating materials and other products. Due to their reliability and durability, its products are widely used in various industries. In the days to come, the company will continue to provide customers with high-quality products and a full range of technical support.