Problems that should be paid attention to when using variable speed INA self-aligning ball bearings

1. Understand the shape and connection dimensions of the variable speed drive INA self-aligning ball bearing.
2. Variable speed drive INA self-aligning ball bearings can be placed horizontally or vertically or tilted. Can be rotated forward and backward. Positive and negative input and output power.
3, variable speed drive INA self-aligning ball bearings regardless of the installation method, and its couplings have size requirements.
Recommended:
The inner ring hole d and the shaft are matched by H7/h6;
The pin hole do of the middle ring and the transmission are matched by H7/r6;
The outer ring D and the housing are matched by H8/h7;
The gear is matched with the hole on the output shaft by a clearance fit, and the gap is 0.2~0.5mm.
4. Axial positioning of the variable speed drive INA self-aligning ball bearing: After any three turns of the ring are axially positioned, the other two axes do not need to be axially positioned.
5. Positioning in the direction of rotation; both the outer ring and the inner ring are flat key positions. The middle circle is positioned by the drive.
6. Variable speed drive INA self-aligning ball bearings can withstand small external forces in the radial direction, but should not withstand large working loads.
7. Transmission ratio is the transmission ratio according to the first installation method. If other installation methods are used, the gear ratio should be calculated.
8. At the rated speed (1500 rpm), select the variable speed drive INA self-aligning ball bearing model according to the transmission ratio and the required power (Kw).
9. When based on the working torque, the model number should be selected accordingly.
10. The selection of the reducer model should be consistent with the model of the variable speed drive INA self-aligning ball bearing.

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Vibration and temperature check of SKF needle roller bearings in operation

SKF needle roller bearings are sensitive to bearing damage. For example, peeling, indentation, rust, cracks, wear, etc. are reflected in the bearing vibration measurement. Therefore, by using a special SKF needle bearing vibration measuring device (frequency analyzer) Etc.) The magnitude of the vibration can be measured, and the specific situation of the abnormality cannot be inferred by the frequency division. The measured values ​​vary depending on the conditions of use of the bearing or the mounting position of the sensor. Therefore, it is necessary to analyze and compare the measured values ​​of each machine in advance to determine the judgment standard.
Second, the temperature of SKF needle roller bearings
The temperature of the SKF needle roller bearing is generally estimated by the temperature outside the bearing. If the oil hole can directly measure the outer ring temperature of the SKF needle bearing, it is more suitable.
Normally, the temperature of the SKF needle roller bearing rises slowly as the bearing starts to run, and reaches a steady state after 1-2 hours. The normal temperature of SKF needle roller bearings varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are suitable, the SKF needle roller bearing temperature will rise sharply and abnormal temperature will occur. At this time, it is necessary to stop the operation and take necessary precautions.
The thermal sensor can be used to monitor the working temperature of the SKF needle roller bearing at any time, and automatically alarm or stop the occurrence of the burning shaft accident when the temperature exceeds the specified value.
The high temperature often indicates that the SKF needle roller bearing is in an abnormal condition. High temperatures are also harmful to the lubricant of the bearing. Sometimes bearing overheating can be attributed to the lubricant of SKF needle roller bearings. If the bearing is rotated for a long time at a temperature exceeding 125 °C, the life of the SKF needle bearing will be reduced. Causes of high temperature bearings include: insufficient lubrication or excessive lubrication, lubricants. Contains impurities, excessive load, bearing damage, insufficient clearance, and high friction caused by oil seals.

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