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Talking about the device method and operating environment of the bearing
Source: China Bearing Network Time: 2013-12-21
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The bearing device must be carried out under boring and hygienic environmental conditions. Before the device, carefully check the cooperation appearance of the shaft and the outer casing, the end face of the shoulder, the groove and the processing quality of the joint appearance. It is necessary to carefully remove all the cooperation and appearance. Remove the burr; it is necessary to remove the sand from the unprocessed appearance of the casting.
The bearing device should be cleaned and cleaned before use; it should be used after boring; and it should be excellent and smooth; the bearing should be smooth and smooth; the oil should be smooth. When the grease is smooth, it should be excellent in impurities, oxidation, rust and extreme pressure. Smooth grease. Smooth grease filling capacity is 30%-60% of bearing and bearing housing volume; not too much. Double row tapered roller bearing and water pump shaft bearing with sealing layout have been filled with smooth grease; users can directly use; No more cleaning.
When bearing the device; it is necessary to apply equal pressure on the circumference of the end face of the ferrule; press the ferrule; do not directly hit the bearing end face with the number one thing; avoid damage to the bearing. Under the condition of small interference; Press the sleeve on the end face of the bearing ring at normal temperature; hit the sleeve with the head; press the sleeve evenly through the sleeve. If it is a large-scale device; use a hydraulic press. When pressing in; ensure the outer ring end face and The shoulder end face of the outer casing; the inner ring end face and the end face of the shaft shoulder are pressed tightly; no gap is allowed.
When the interference is large; you can use oil bath heating or induction heating to install the device; the heating temperature is 80 °C-100 °C; the maximum can not exceed 120 °C. Together; use nuts or other appropriate means to tighten the bearing ; to avoid the shortening of the width direction of the bearing after cooling, resulting in a gap between the ferrule and the shoulder.
The single-row tapered roller bearing device should be adjusted for the clearance at the end. The clearance value should be determined in detail according to the different operating conditions and the cooperative interference amount. If necessary, the experimental determination should be made. Double row tapered roller bearing And the pump shaft bearing has been adjusted at the factory clearance; the device does not need to be adjusted.
The bearing device shall be subjected to a rotation test; it shall be used primarily for rotating shafts or bearing housings; if it is not abnormal; it shall be operated without load and low speed with power; then gradually increase the rotation speed and load depending on the working conditions; and detect noise, oscillation and temperature rise; Found abnormal; should stop the operation and check. The operation experiment can be delivered after normal operation.
Second, the disassembly of the bearing : after the bearing is removed, it is intended to be used continuously; the appropriate disassembly should be used. The ferrule of the interference cooperation should be dismantled; only the pulling force should be added to the ferrule; Pass the disassembly force; otherwise the roll and raceway will be crushed.
Third, the operating environment of the bearing: according to the application site and operating conditions and environmental conditions to select the standard scale, accuracy; cooperative bearing is the condition to ensure the bearing life and reliability.
1. Application: Tapered roller bearings are suitable for accepting radial and axial combined loads with radial loads; usually used with two sets of bearings; first and foremost for the front and rear hubs of the car, automatic bevel gears, differential Transmission parts such as reducer and reducer.
2, promise speed: in the correct, smooth and outstanding environment; the maximum speed of the bearing is 0. 3-0. 5 times. Under normal conditions; the maximum speed of 0.2 times is the most suitable.
3, promised slanting angle: Tapered roller bearings usually do not allow the shaft to be skewed relative to the housing hole; if there is skew; the maximum does not exceed 2'.
4, promise temperature: in the normal load; and the smoothing agent has high temperature resistance; and smooth and abundant conditions; usually the bearing promises to work at -30 ° C -150 ° C ambient temperature.
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