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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Analysis and transformation of medium-sized motor bearing problems (1) Analysis and Reconstruction of Bearing Problems in Medium Motors (I)
In the subordinate equipment of the power plant; the electric motor is the primary source of power to complete and ensure the normal operation of the unit; therefore, the loss caused by the motor's attack is quite large; especially the medium-sized electric motor; can seriously affect the safety of the unit. Operation. According to our calculation of motor faults; bearing damage or motor damage caused by bearing damage; accounted for more than 60% of the motor problems; so the treatment of motor bearing damage is also an important problem in dealing with motor problems. According to analysis; Most of the medium-sized motors are "end-end sliding bearing type" layout and "end-end rolling bearing type" layout. Through our summary and analysis of various medium-sized motor maintenance experience; I think the following problems exist: /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
1. End cap sliding bearing type: Most of these motors have the appearance of bearing bush heat and oil leakage; the corrosion of the stator coil of the motor is formed; and the oil and ash accumulated inside the motor is excessive; the ventilation is poor; The motor temperature is too high and damaged.
2. Box-type high-voltage motor: This motor is a new type of motor produced in China in these years; its function and shape are superior to the "JS series" motor. However, some of the motors produced by some manufacturers have existed in the depiction of bearings. Some lack of; the formation of the motor in the running bearing problems more. These motors are arranged on the outside of the bearing with a small oil-displacement disc from the bearing; so that the grease inside the bearing can be adhered to Sufficient; however, this layout has several shortcomings:
(1) It is not conducive to the heat dissipation of the bearing and the circulation of the grease; the temperature of the bearing is increased during operation; the function of the grease is decreased; then the vicious cycle of increasing the temperature is formed; the bearing is damaged.
(2) Due to the existence of the bearing oil retaining disc; the motor is in minor repair; the bearing cover cannot be viewed when the motor is overhauled; and the bearing can not be removed without removing the oil retaining disc; Necessary dross.
(3) Due to repeated maintenance, the oil retaining disc and the bearing should be dismantled; the loosening of the inner hole of the oil retaining disc and the shaft is formed; the oil retaining disc is released from the shaft during operation;
3. Double-bearing motor: Some medium-sized motors produced in China today; the load side uses a double-bearing layout. This adds the radial load on the load side; however, it also brings difficulty to the overhaul. During the overhaul of the motor Bearings can not be removed and viewed and it is necessary to replace; otherwise the quality of inspection can not be ensured; the addition of maintenance costs is formed; other; the motor of this layout; most of the bearings are in operation at higher temperatures; Life is reduced and damaged.
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Analysis and Reconstruction of Bearing Problems in Medium Motors (I)
Source: Bearing network time: 2014-02-06