Bearing professor teaches you to repair grinder static pressure imported bearings

**Bearing Professor Teaches You How to Repair Imported Static Pressure Bearings in Grinders** Home > Bearing Knowledge > Bearing Professor Teaches You How to Repair Grinder Static Pressure Imported Bearings Source: China Bearing Network | Time: April 11, 2013 --- The professor provided a detailed explanation on how to repair static pressure bearings in grinders, covering three key aspects: 1. **Hole Saver:** - Change from internal to external savings. Install pressure gauges to monitor the pressures in the upper and lower chambers in real-time, making maintenance and repairs more convenient. This is especially beneficial for quick cleaning, which internal savers cannot match. - The theoretical saving ratio (Î²) should be between 1.2 and 1.5. Based on years of experience, a value of 1.25 is ideal. During repairs, it's essential to maintain high precision in the spindle and front and rear bearing pads, ensuring strict control over coaxiality, roundness, and taper to guarantee an optimal Î² value. - Determine the e value (the misalignment between the main shaft and the bearing bush) based on the machine tool's load. Adjust the Î² value accordingly for the best performance. - Ensure that each oil chamber does not have its own spindle. The oil columns from each outlet must be common. If not, adjust the aperture of the saver to ensure even distribution. 2. **Thin Film Reaction Saver:** - The stiffness of the film reaction bearing is very high, but during operation, machines may show signs like tilting, pulling, or pressure loss. The most critical factor here is the film itself. In practice, the primary causes of bearing locking or pulling are: - Plastic deformation of the film under heavy load. - Slow response when the external load changes suddenly, causing the axis and tile to clash before the film reacts. - Fatigue deformation due to long-term use, effectively altering the reaction parameters. - To improve this, increase the thickness of the film and use fatigue-resistant materials. Typically, rigid films with pre-loading and clearance adjustments are used. For example, replace a 1.4mm thick film with a 4mm rigid one, add a 0.05mm thick tin foil paper to the cavity pad, and adjust the spindle to be 0.05mm higher than the azimuth orientation. This ensures the spindle (grinding wheel assembly, cutting force) returns to the center position. 3. **Improvement of the Oil Supply System:** - The oil supply system for imported static pressure bearings includes coarse and fine filtration, as well as other components that protect the hydrostatic bearings. Enhancing the original system can significantly improve performance. - After the saving plate, connect the oil outlet to a pressure relay and pressure gauge (previously located before the accumulator). This allows operators to monitor both the chamber and inlet pressures. If the pressure difference exceeds a certain threshold, it can prevent the axle from locking. For instance, if the inlet pressure is 2 MPa, the outlet should be between 1.2â€“1.6 MPa; below 1.2 MPa, the system should shut down. - Add a digital detection device. There is a gap of 0.04â€“0.05mm between the main shaft and the bearing bush, and the oil has a certain resistance. By detecting resistance changes, you can determine the gap size. One pole is the bearing, and the other is the shaft. Measure the resistance change and send the signal to a photoelectric alarm and control system amplifier. This helps control the start and stop of the spindle motor, preventing conflicts between the axis and the tile. --- **Related Bearing Knowledge** - Disassembly methods for different types of imported bearings - Detailed analysis of IKO cam bearing fault cleaning - Comprehensive summary of large roller bearing repair methods - Fan bearing skill status and more --- This article is linked to http:// Please indicate the bearing network: http:// Previous: Bearing Oil Next: Ceramic Materials Used in Bearing Production
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