A motor end cover and a motor

Abstract

The invention discloses a motor end cover and a motor which is provided with the motor end cover. The motor end cover is of a sandwich structure which is provided with an inner space. A first ventilation opening and a second ventilation opening are formed in the end face of the outer side of the motor end cover, part of flowing air flows out from the first ventilation opening, and the other part of flowing air passes through the inner space and flows out from the second ventilation opening. The distance from the first ventilation opening to the center of the motor end cover is larger than the distance from the second ventilation opening to the center of the motor end cover. The distance from the second ventilation opening to the center of the motor end cover is smaller than the distance from a stator outer wall ventilating duct to the center line of a driving shaft. According to the motor end cover, the inner space of the sandwich structure and the second ventilation opening enable the flowing air to pass through on the periphery of a bearing so that the bearing can be cooled. Moreover, due to the fact that the flowing air flowing out from the second ventilation opening speeds up air motion nearby the driving shaft, the driving shaft and the bearing can be better cooled, and therefore the motor end cover can control the temperature of the motor bearing to be raised so that the motor can be guaranteed to achieve normal operation. The motor end cover and the motor are strong in innovativeness and reliable in performance.

Description

technical field [0001] The invention relates to the field of motor equipment, in particular to a motor end cover and a motor provided with the motor end cover. Background technique [0002] For motors that are low from the ground, small wheel diameter, and operating in harsh environments, the ventilation method is a fully enclosed self-ventilation method. Compared with forced ventilation, it can prevent ground garbage and iron filings from entering the motor. [0003] see figure 1 Schematic diagram of the ventilation method of the fully enclosed self-ventilating motor shown, and figure 2 The schematic diagram of the structure of the motor end cover is shown. When the fully enclosed self-ventilated motor is running, the stator core 2 and the casing 1 are fixed, and the rotor 4 located at the center of the stator core 2 rotates with the drive shaft 6. At this time, the flow Air enters the interior of the motor from the air inlet at one end of the motor, passes through the a...

AI Technical Summary

Problems solved by technology

During the operation of the motor, the rotor generates heat at high speed, which is transmitted to the bearing, causing the temperature of the bearing to rise; the temperature of the bearing rises, causing the grease inside the bearing and the motor bearing chamber to separate from the base oil. After the motor has been running for a long time, the bearing is short of oil, thus Lead to solid bearing, directly affect the reliable operation of the train

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