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Skill analysis: device for connecting the bearing of the automobile water pump shaft
Source: China Bearing Network Time: 2017-09-29
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1. Bearing device: 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. The articles in this site are all from the network.
It is necessary to carefully remove and remove the burrs when all cooperation is connected. It is necessary to remove the sand from the unprocessed appearance of the casting.
Before the bearing device, it should be cleaned with gasoline or kerosene; it should be used after boring; and it should be excellent and smooth; the bearing is usually smooth and greased; oil can be used smoothly. Copyright statement: Information provided by this site; Materials; please contact customer service.
When the grease is smooth, it should be smooth grease with no impurity, anti-oxidation, anti-rust and extreme pressure.
The amount of smooth grease filling is 30%-60% of the bearing and bearing box volume; it should not be too much. Copyright statement: The articles in this site are all from the network; if there is any infringement; please contact the operator of this station; we will delete it immediately after receiving it; Thank you! .
Double row tapered roller bearings and pump shaft bearings with sealed layout have been filled with smooth grease; users can directly use them; no more cleaning can be done. Special attention: all reprinted articles on this site do not represent the concept of this site; Please contact us; copyright belongs to the original author.
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.
In the case of small interference; the sleeve can be pressed against the end face of the bearing ring at normal temperature; the sleeve is struck with the head; the sleeve is evenly pressed through the sleeve.
If it is a large-scale device; hydraulic machine can be used.
When pressing in; ensure that the end face of the outer ring and the shoulder end face of the outer casing; the end face of the inner ring and the end face of the shoulder of the shaft are pressed; no gap is allowed.
When the interference is large; oil bath heating or inductor heating can be used to install the device; the heating temperature scale is 80 °C-100 °C; the highest can not exceed 120 °C.
Together; use a nut or other appropriate means to tighten the bearing; to avoid the shortening of the width direction of the bearing after cooling, so that the gap between the ferrule and the shoulder of the single row tapered roller bearing device should be adjusted.
The clearance value should be determined in detail according to the different operating conditions and the size of the cooperative interference. If necessary, the experimental determination should be made.
Double row tapered roller bearings and pump shaft bearings have been adjusted for clearance at the factory; no adjustment is required for the unit.
After the bearing device, the rotation test should be carried out; firstly, it should be used for rotating shaft or bearing box; if it is not abnormal; it will be driven without load and low speed by power; then gradually increase the rotation speed and load according to the working condition; and detect noise, oscillation and temperature rise. Found abnormal; should stop the operation and view.
After the homework experiment is normal, it can be delivered.
Second, the disassembly of the bearing: after the bearing is removed, it is intended to be used continuously; the appropriate disassembly should be used.
Disassemble the ferrule of the interference cooperation; only pull the tension on the ferrule; never allow the detachment force to pass through the tumbling body; otherwise the tumbling body and the raceway will be crushed.
Third, the bearing application environment: according to the application site and operating conditions and environmental conditions to select the standard scale, accuracy; cooperation with the bearing is to ensure the bearing life and reliability conditions.
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 wheels 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 allowed to be 0.3-0.5 times. Under normal conditions; 0.2 times the limit speed is the most suitable.
3, promised skew angle: tapered roller bearings usually do not allow the shaft to be skewed relative to the shell 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 plentiful conditions; usually the bearing promises to work at -30 ° C -150 ° C ambient temperature..
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