Installation method of sealed self-aligning roller bearings

The installation methods of sealed self-aligning roller bearings mainly include hot installation, tightening sleeve installation, and hydraulic nut installation. The following are specific installation steps and precautions:

1、 Hot installation method

Heating preparation:

Choose appropriate heating equipment, such as heating oil tanks, ovens, tempering furnaces, or inductive heaters.

Preheat the heating equipment to 80-100 ℃, ensuring that the oil temperature does not exceed 120 ℃.

Heating bearings:

Immerse the bearing completely in heated oil and maintain the oil temperature at 80-100 ℃ until the oil and bearing are isothermal.

The heating and insulation time depends on the size of the bearing, usually 30 minutes.

Installing bearings:

Clean the surface of the shaft thoroughly to ensure there are no oil stains or impurities.

Wear insulated gloves and place the heated bearings directly onto the shaft.

If the bearing cannot be installed smoothly in place, it should be immediately removed from the shaft to avoid difficulty in disassembly.

Locking and cooling:

Insert the bearing directly onto the shaft until the inner ring end face of the bearing is in close contact with the shaft shoulder.

After the bearing has cooled down, tighten the locking nut or fix it with a locking washer and locking clip.

2、 Tightening sleeve installation method

Preparation and Cleaning:

Wear clean gloves to ensure a clean working environment.

Place the fastening sleeve, locking nut and other accessories on the platform, and clean the surface of the shaft.

Install the fastening sleeve:

Use a screwdriver to attach the fastening sleeve onto the shaft, ensuring that the threaded side faces the end of the shaft.

For shafts with shoulder, when installing spacer rings, they should be installed between the shoulder and the fastening sleeve.

Installing bearings:

Install the bearing onto the clamping sleeve, ensuring that the inner ring end face of the bearing is pressed against the spacer ring (if any).

Use locking nuts to secure the locking sleeve and bearing onto the shaft.

Adjustment and fixation:

Use a specialized wrench to tighten the locking nut until it presses against the inner ring end face of the bearing, and stop when the torque of the wrench increases.

Adjust the axial position of the bearing as needed until the desired clearance is achieved.

Use locking washers or locking clips for fixation.

3、 Installation method of hydraulic nut

Preparation and Cleaning:

It is also necessary to wear clean gloves to ensure a clean working environment.

Place the tightening sleeve, hydraulic nut and other accessories on the platform, and clean the surface of the shaft.

Install the tightening sleeve and bearing:

Install the tightening sleeve onto the shaft according to the steps of the tightening sleeve installation method.

Install the bearing onto the clamping sleeve and ensure that the inner ring end face of the bearing is pressed against the spacer ring (if any).

Install hydraulic nut:

Install the hydraulic nut onto the tightening sleeve.

Use a specialized wrench to press the hydraulic nut plate against the inner ring end face of the bearing, with the piston in the unloaded position.

Pressurization and adjustment:

Connect the oil pipe of the hydraulic pump to the hydraulic nut.

Slowly press the control rod of the oil pressure pump to increase pressure until the bearing clearance begins to change.

Determine the recommended residual clearance based on the inner diameter size of the bearing as the installation clearance target value.

Continue to press the control rod of the oil pressure pump to increase pressure, and repeatedly measure the radial clearance of the bearing until the installation clearance target value is reached.

Fixed and lubricated:

Remove the oil pipe and remove the oil pressure nut.

Use locking washers or locking clips for fixation.

After installing the bearings, apply lubricating oil to the bearings and cover them with plastic film to prevent dust.

4、 Precautions

Installation environment: Installation should be carried out in a clean environment to avoid contamination of bearings and installation positions by dust, dirt, or moisture.

Bearing inspection: Before installation, the bearings and their accessories should be checked for cleanliness and no damage.

Measurement and adjustment: During installation, the clearance of the bearing should be measured and adjusted as needed.

Locking and fixing: It should be ensured that the bearings are correctly locked and fixed to avoid loosening or falling off during use.

Lubrication and dust prevention: After installation, lubricating oil should be applied to the bearings and covered with plastic film to prevent dust.

In summary, the installation methods of sealed self-aligning roller bearings include hot installation, tightening sleeve installation, and hydraulic nut installation. During the installation process, the operating procedures and precautions should be strictly followed to ensure the safe, stable, and efficient operation of the bearings.