Installation Method And Precautions Of Skf Thrust Ball Bearing
Installation Method And Precautions Of Skf Thrust Ball Bearing
2021年12月21日
Bearing Installation Knowledge
Bearing Installation Knowledge
2021年12月21日

Bearing Installation Method

Bearing Installation Method

Installation method: The installation of the bearing shall be determined according to the bearing structure, size and the matching nature of the bearing components. The pressure shall be directly added to the end face of the tightly matched ferrule, and the pressure shall not be transmitted Bearing Installation Method through the rolling element. The bearing installation generally adopts the following methods:

a. Press fit

The inner ring of the bearing fits tightly with the shaft. When the outer ring fits loosely with the bearing seat hole, the bearing can be press installed on the shaft first, and then the shaft and the bearing can be installed into the bearing seat hole. During press installation, Bearing Installation Method an assembly sleeve (copper or mild steel) made of soft metal material shall be padded on the end face of the bearing inner ring.

The outer ring of the bearing fits tightly with the bearing seat hole. When the inner ring fits loosely with the shaft, the bearing can be pressed into the bearing seat hole first. At this time, Bearing Installation Method the outer diameter of the assembly sleeve should be slightly smaller than the diameter of the seat hole.

If the bearing ring is tightly matched with the shaft and seat hole, the inner ring and outer ring in the installation chamber shall be pressed into the shaft and seat hole at the same time, and the structure of the assembly sleeve shall be able to press the end faces of the bearing inner ring and outer ring at the same time.

Bearing Installation Method

b. Heating fit

The installation method of changing tight fit into loose fit by heating bearing or bearing seat and using thermal expansion. It is a common and labor-saving installation method. Bearing Installation Method This method is suitable for the installation of bearings with large interference. Before hot installation, put the bearing or the ferrule of separable bearing into the oil tank and heat it evenly for 80-100 ℃, then take it out of the oil and install it on the shaft as soon as possible.

In order to prevent the end face of inner ring and shaft shoulder from not tight after cooling, Bearing Installation Method the bearing can be tightened axially after cooling. When the bearing outer ring is tightly matched with the bearing seat made of light metal, the hot installation method of heating the bearing seat can avoid the scratch of the mating surface.

When heating the bearing Bearing Installation Method with the oil tank, there should be a mesh grid at a certain distance from the box bottom, as shown in Figure 2-7, or hang the bearing with a hook. The bearing cannot be placed on the box bottom to prevent sinking impurities from entering the bearing or uneven heating. There must be a thermometer in the oil tank, and the oil temperature must be strictly controlled not to exceed 100 ℃ to prevent tempering effect and reduce the hardness of the ferrule.

c. Installation of thrust bearing

The fit between the circumference of the thrust bearing and Bearing Installation Method the shaft is generally transition fit, and the fit between the race and the bearing seat hole is generally clearance fit. Therefore, this kind of bearing is easy to install. The middle shaft spring of the two-way thrust bearing should be fixed on the shaft to prevent rotation relative to the shaft.

Generally, the installation method of bearing is mostly shaft rotation, so the fit between inner ring and shaft is win-win fit, and the fit between bearing outer ring and bearing chamber is clearance fit.

Bearings with water as lubricant are generally sliding bearings. Babbitt alloy used in early water lubricated bearings has long been used in the field of ships, because water can provide hydrodynamic film under certain conditions. Water lubricated bearings are based on self-lubricating materials and combined with the lubricity of water under certain conditions, so as to be used in hydropower stations and other fields.

Water does not have the same high viscosity and lubricity as the recognized lubricant petroleum. Water does have limited viscosity and density, so it can provide hydrodynamic membrane. The research and development of superior water lubricated bearings will be based on materials and design, which should have good self sliding and excellent friction resistance.