During the visit to the hammer crusher customers, the Red Star machine found that some of the customers used the equipment only when the rotor bearing life was only a month. How to take effective maintenance measures to prevent the early failure of the rotor bearing is a problem that manufacturers and users are very concerned about. The crusher expert Red Star Machine, which has deep research on the crusher, summarizes the following countermeasures for this problem:
Red Star Machine Interpretation: Short-term solution to the life of hammer crusher rotor bearings
1. Choose a reasonable tolerance
The technicians of the Red Star machine have found through analysis that improper matching of the tolerances between the inner ring of the bearing and the journal can result in damage to the bearing rotor. In order to ensure that the inner ring of the bearing and the journal are substantially over-matched under the condition of high temperature rise without looseness, it is recommended that the coupling between the journal and the inner ring be P6 or r6, and the outer ring and the bearing seat are used together. F8 or E8.
2, strengthen the seal lubrication
Timely and correct lubrication can greatly reduce frictional resistance and inhibit bearing temperature rise. For the high-speed and heavy-duty working characteristics of the rotor bearing, the molybdenum disulfide composite calcium-based grease should be used to lubricate the bearing. In addition, the grease should be added once every 8 hours, the oil should be changed every 3 months, and the bearings and seals should be cleaned with gasoline or kerosene. , cover, timely replacement of the labyrinth seal cover on the bearing seat with excessive wear clearance.
3. Improve the bearing condition of the bearing
The addition of a rubber plate of appropriate thickness between the bearing housing and the support frame improves the bearing flexibility of the bearing and reduces the impact load acting on the bearing. Due to the addition of the rubber sheet, the flexibility is increased, thereby absorbing a part of the vibration energy, improving the bearing condition of the bearing and achieving the purpose of prolonging the service life.
4. Balance the rotor during assembly
The manufacturer must perform a balance test on the rotor to meet the requirements of the standard. In order to avoid the casting deviation of the rotor and the quality deviation after the hammer is installed, the unbalanced centrifugal force of the rotor causes the machine to generate forced vibration, which causes damage to the bearing and other parts. Therefore, the balance of the rotor should be done during assembly.
The hammer crusher is a machine that uses a hammer that rotates at a high speed on a rotor body to crush materials. The Red Star machine believes that it is important to find the problem and solve the problem in a targeted manner. The problem of short life of the rotor bearing is solved, which can solve the big trouble of the user, and the enterprise no longer has to worry about frequent troubles such as frequent replacement of the rotor bearing.
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