Motor shaft sealing structure with high protection grade

Abstract

The invention discloses a motor shaft sealing structure with a high protection grade. The motor shaft sealing structure with the high protection grade can reach the grade of IP65 or IP67 and comprises a dust cover, a bearing outer cover, a bearing inner cover, an end cover and a bearing. Two groups of end face type oil seals are arranged in a space formed by the dust cover, the bearing outer cover and a shaft, a first labyrinth ring is arranged on the bearing outer cover, high-temperature and high-speed lubricating grease is applied to the position where the first labyrinth ring is matched with the bearing outer cover, and the inner diameter of the labyrinth ring is in interference fit with the shaft; a second labyrinth ring is further arranged on the bearing inner cover, high-temperature and high-speed lubricating grease is applied to the position where the second labyrinth ring is matched with the bearing inner cover, and the inner diameter of the second labyrinth ring is in interference fit with the shaft; a felt collar oil seal is arranged between the bearing inner cover and the shaft; and the end cover is arranged on the outer side of the bearing in the radial direction, the bearing outer cover and the bearing inner cover are connected together through a bolt, and an O-shaped sealing ring is arranged among the bearing outer cover, the bearing inner cover and the end cover. The motor shaft sealing structure with the high protection grade has the advantages of being capable of effective preventing external dust and water splashing towards all directions from entering in a cavity of a motor so as to protect motor windings and prolong service life of the motor, small in axial structure occupying space, suitable for tendency of design of motors with small volume and high power, low in cost, simple in structure, good in effect and free of influence on anti-explosion performance of the motor.

Description

technical field [0001] The invention relates to the field of electromechanical equipment, in particular to a high protection level motor shaft sealing structure. Background technique [0002] Due to the rotation of the motor shaft, it is very difficult to seal the shaft end of the motor, especially when the environment is harsh underground. Due to the unreliable sealing performance of the motor, water in the cavity often occurs, which affects the insulation of the motor. It is very large, and even burns the winding, so that the supporting equipment such as mining cannot operate normally. And some manufacturers adopt the conventional mechanical seal structure to meet the sealing requirements of high protection level, but the axial space of the general structure is large, and the application is limited under the requirements of small volume and high power motor design. Contents of the invention [0003] In order to solve the above technical problems, the object of the prese...

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Problems solved by technology

[0002] Due to the rotation of the motor shaft, it is very difficult to seal the shaft end of the motor, especially when the environment is harsh underground. Due to the unreliable sealing performance of the motor, water in the cavity often occurs, which affects the insulation of the motor. It is very large, and even burns the winding, so that the supporting equipment such as mining cannot operate normally

And some manufacturers adopt the conventional mechanical seal structure to meet the sealing requirements of high protection level, but the axial space of the general structure is large, and the application is limited under the requirements of small volume and high power motor design

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