Let me introduce you to the detailed installation method of the bearing:
The items of the job standard are usually as follows:
(1) Cleaning bearings and bearing related parts
(2) Check the size and finishing of the connected parts
(3) Installation
(4) Inspection after mounting the bearing
(5) The installation method of the supply lubricant bearing varies depending on the bearing structure, fit, and conditions. Generally, since the shaft is rotated, the inner ring needs an interference fit. The cylindrical hole bearing, the press is pressed in, or the hot press is used. Method. For the case of the taper hole, it is directly mounted on the taper shaft or installed with a sleeve. When mounting to the outer casing, there is usually a lot of clearance, and the outer ring has an interference amount, which is usually pressed by a press or installed after cooling. Cold shrinkage method. When using dry ice as a coolant and shrinking and fitting, the moisture in the air will condense on the surface of the bearing. Therefore, appropriate rust prevention measures are required.
1, the installation of cylindrical hole bearings
(1) Method of press-in with a press The method of press-fitting a small-sized bearing is widely used. The pad is placed in the inner ring, and the press is quietly pressed to the inner ring to closely contact the shaft shoulder. The inner ring of the pad on the ring pad is the cause of the indentation and crushing on the raceway, so it must be absolutely forbidden. When operating, it is best to apply oil on the mating surface beforehand. If you have to use the hammer to hit the installation, you must The operation of the pad on the pad. This practice has often become the cause of bearing operation, so it is limited to the case of small interference, can not be used for large interference, or medium and large bearings. Such as deep groove ball bearings and the like. For non-separable bearings, the inner ring and the outer ring need to be installed with interference. Use the pad or the oil pressure to press the inner ring and the outer ring at the same time. The outer ring of the self-aligning ball bearing is easy to tilt. Even if it is not an interference fit, it is better to install the spacer. For the separate bearings such as cylindrical roller bearings and tapered roller bearings, the inner and outer rings can be mounted on the shaft and the outer casing respectively. When the inner and outer rings are combined, the key is to firmly close the two so that the center is not Health deviation, barely pressed membership card injuries caused by the raceway.
(2) Hot-packing method Large-sized bearings require a large force when pressed, so it is difficult to press in. Therefore, the bearing is heated in the oil to expand, and then the hot-packing method mounted on the shaft is widely used. Using this method, it is possible to add undue force to the bearing and complete the work in a short time. The heating temperature of the bearing is based on the bearing size and the required interference. The precautions for hot loading work are as follows:
(a) does not heat the bearing to above 120 ° C;
(b) In order to prevent the bearing from directly contacting the bottom of the oil groove, it is best to consider placing the bearing on the metal net or lifting the bearing;
(c) Heating the bearing to a temperature 20 ° C to 30 ° C higher than the required temperature so that the inner ring does not become cold during operation and is difficult to install;
(d) After installation, the bearing is cooled down and the width direction is also contracted, so use a shaft nut or other suitable method to tighten it to prevent a gap between the inner ring and the bearing shoulder.
2, the tapered bore bearing mounting cone bearing is to directly fix the inner ring to the tapered shaft, or with the adapter sleeve, the disassembly sleeve is mounted on the cylindrical shaft. Large-scale self-aligning bearings are often installed with oil pressure.
3. Operation check After the installation of the bearing is completed, in order to check whether the installation is correct, the operation check is required, and the small machine can be rotated by hand to confirm whether the rotation is smooth. The inspection item has poor operation due to foreign matter, scars, and indentation, due to installation. Poor, uneven rotation torque caused by poor machining of the mount, too small clearance, large torque caused by installation error sealing friction, etc. If there is no abnormality, the power running can be started.