Installation method of RDK bearing

  The installation of RDK bearing will directly affect the use effect of RDK bearing. If the RDK bearing is used improperly in the process of installation, it will not only damage the bearing, but also lead to the damage of mechanical equipment and operation fault light. Main installation steps and process.

  First, clean the RDK bearings and related parts. For grease lubricated bearings and bearings with oil seals or dust covers on both sides, there is no need to clean the sealing ring bearings before installation.

  Second, check the size and finishing of relevant parts.

  Third, installation method:

  The installation of RDK bearing shall be determined according to the bearing structure, size and matching property of bearing components. The pressure shall be directly applied on the end face of tight fitting ring, and the pressure shall not be transmitted through rolling element. The following methods are generally adopted for bearing installation:

  (1) When the inner ring of the bearing is tightly matched with the shaft and the outer ring is loosely matched with the bearing seat hole, the bearing can be pressed onto the shaft with a press, and then the shaft and the bearing can be installed into the bearing seat hole together. When pressing, 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 inner diameter of the assembly sleeve shall be slightly larger than the diameter of the journal, and the outer diameter shall be smaller than the diameter of the bearing inner ring The ribs are slightly smaller to avoid pressing on the cage. When the outer ring of the bearing fits tightly with the bearing seat hole, and the inner ring fits loosely with the shaft, the bearing can be pressed into the bearing seat hole first. At this time, 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. The structure of the assembly sleeve shall be able to compress the end face of the inner ring and outer ring of the bearing at the same time.

  (2) By heating the bearing or bearing seat, the tight fit can be changed into loose fit by thermal expansion. It is a common and labor-saving installation method. This method is suitable for the installation of bearings with large interference. Before hot installation, put the rings of bearings or separable bearings into the oil tank and evenly heat them for 80-100 ℃. Then take them out of the oil and install them on the shaft as soon as possible. In order to prevent the end face of inner ring and shaft shoulder from not fitting tightly after cooling, the bearings can be tightened axially after cooling. When the outer ring of the bearing is tightly matched with the bearing seat made of light metal, the hot assembly method of heating the bearing seat can avoid the abrasion of the matching surface. When the oil tank is used to heat the bearing, there should be a grid at a certain distance from the bottom of the box, or the bearing should be hung with a hook. The bearing should not be placed on the bottom of the box to prevent impurities from entering the bearing or uneven heating. There must be a thermometer in the oil tank, and the oil temperature should not exceed 100 ℃ to prevent tempering effect and reduce the hardness of the ring.