How to distinguish between bushings and bushings?

How to distinguish between bushings and bushings?

The application of shaft sleeves in replacing rolling bearings at low speeds

1. The shaft sleeve is used on gear shafts or bearings, mainly for fixing and positioning purposes. For example, the gear shaft needs to be used during the installation 

of the reducer to fix the center positioning of the shaft and prevent the bearing from shifting due to vibration during operation.

2. The shaft sleeve serves as a sliding bearing, and in order to save materials, the wall thickness of the shaft sleeve is designed according to the axial load required by 

the bearing. Generally, cast copper and bearing alloy materials are selected. The shaft sleeve can be divided into open and non open types, depending on the structural requirements. Generally, shaft sleeves cannot withstand axial loads, or can only withstand small axial loads or thrust bearings, while shafts are generally circular.

3. In some places where the speed is low, the radial load is high, and the clearance requirement is high (such as camshafts), shaft sleeves are used to replace rolling 

bearings (in fact, shaft sleeves are also a type of sliding bearing). The material requirements are low hardness and wear resistance. The inner hole of the shaft sleeve 

can be ground and scraped to achieve high fitting accuracy. There must be a lubricating oil groove on the inner wall of the shaft sleeve. Lubrication of the shaft sleeve 

is very important. Several grinding shafts and shaft sleeves will soon be scrapped. It is recommended to scrape the inner hole wall of the shaft sleeve during installation, 

which can leave many small pits and enhance lubrication function.

The lining is used as a wear-resistant component in friction pairs

Bushings are matching components used outside mechanical components to achieve sealing, wear protection, and other functions. The use of bushings is very wide, 

and many components in the industrial field, such as valves, bearings, etc., will use bushings.

The function of the lining

The flexibility of using bushings is relatively high, and they can play many roles. Generally speaking, bushings are a type of component that protects equipment. The use 

of bushings can reduce equipment wear, vibration, and noise, and has a corrosion-resistant effect. The use of bushings can also facilitate the maintenance of mechanical equipment, simplify the structure and manufacturing process of the equipment.

The role of the liner in practical work is closely related to its application environment and purpose. In the field of valve applications, a liner is installed inside the valve cover 

to cover the valve stem, thereby reducing valve leakage and achieving a sealing effect. In the field of bearing applications, the use of bushings can reduce wear between the bearing and the shaft seat, and avoid increasing the gap between the shaft and the hole.

Material of lining

The materials of bushings are mostly soft metals, rubber, nylon, and non-metallic polymers, which are relatively soft in texture and have lower prices and costs. In various harsh working environments, the lining is subjected to vibration, friction, and corrosion to protect the wrapped components, and the lining itself is easy to replace, low-cost, and cost-effective after damage.

Factors influencing the selection of lining materials

The use range of bushings is wide and there are many types. To choose a suitable bushing, it is necessary to consider its purpose of use and choose different types of bushings for different working conditions. The main considerations in selecting a liner are the pressure, velocity, pressure velocity product, and load properties that the liner needs to withstand. In addition, whether the liner is lubricated and the lubrication status also determines its effectiveness and lifespan.