CN-122001115-A - High-voltage asynchronous three-phase motor for coal mining machine

CN122001115ACN 122001115 ACN122001115 ACN 122001115ACN-122001115-A

Abstract

The invention discloses a high-voltage asynchronous three-phase motor for a coal mining machine, which relates to the technical field of coal mining motors and comprises a machine base, a front end cover and a rear end cover, wherein a winding stator iron core is arranged in the machine base, the end part of the winding stator iron core is fixedly connected with the machine base, a rotor is rotationally connected in the machine base through a rotating shaft, a bearing assembly comprises bearing chambers arranged in the front end cover and the rear end cover, two ends of the rotating shaft are rotationally connected with the bearing chambers through bearings, the bearing chambers are provided with isolator assemblies, the bearing chambers comprise static rings fixedly connected with the bearing chambers, driving rings are arranged on the rotating shaft, oil seals are arranged between the static rings and the driving rings and are used for improving sealing effects, and a cooling assembly comprises a plurality of cooling water channels arranged on two sides of the machine base, and the front end cover and the rear end cover are respectively provided with a circulating water channel and a bearing chamber water channel which are communicated with the corresponding cooling water channels.

Inventors

Diao Menglei
FENG DING
CHEN XUYANG
WANG LISHA
LI TAO
LI GUANGSHUN
ZHU FENG
WAN YANLI
ZHU LIANGSONG
MA DI
HAN DEQI
ZHANG KAI

Assignees

卧龙电气南阳防爆集团股份有限公司
卧龙电气驱动集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251230

Claims (10)

1. The high-voltage asynchronous three-phase motor for the coal mining machine comprises a machine base, a front end cover and a rear end cover, and is characterized in that a winding stator core is arranged in the machine base, the end part of the winding stator core is fixedly connected with the machine base through an epoxy resin glue seal, and a rotor is rotationally connected in the machine base through a rotating shaft; The bearing assembly comprises a bearing chamber which is arranged in the front end cover and the rear end cover, two ends of the rotating shaft are rotatably connected with the bearing chamber through bearings, the bearing chamber is provided with an isolator assembly which comprises a stationary ring fixedly connected with the bearing chamber, the rotating shaft is provided with a driving ring which is positioned in the stationary ring, and an oil seal is arranged between the stationary ring and the driving ring and used for improving the sealing effect; The cooling assembly comprises a plurality of cooling water channels arranged on two sides of the engine base, the cooling water channels on two sides are distributed in a staggered mode, a circulating water channel and a bearing chamber water channel are arranged on the front end cover and the rear end cover, the circulating water channel is communicated with the corresponding cooling water channel, the bearing chamber water channel is used for cooling the bearing assembly, and a centrifugal fan is arranged on the rotating shaft and used for cooling and radiating through cooperation of the cooling water channel and the epoxy resin glue seal.
2. The high-voltage asynchronous three-phase motor for the coal mining machine, as set forth in claim 1, wherein the winding stator core is formed by stamping a plurality of stator punching sheets, and a plurality of circumferentially distributed vent holes are formed in the yoke parts of the stator punching sheets for improving the heat dissipation efficiency of the winding stator core.
3. The high-voltage asynchronous three-phase motor for the coal mining machine, as set forth in claim 1, wherein the rotor is formed by punching a plurality of rotor punching sheets, and a plurality of circumferentially distributed heat dissipation holes are formed in yoke parts of the rotor punching sheets for improving ventilation and heat dissipation efficiency of the rotor.
4. The high-voltage asynchronous three-phase motor for the coal mining machine, which is characterized in that a plurality of connecting grooves communicated with the corresponding cooling water channels are respectively formed in two ends of the machine base, the front end cover and the rear end cover are communicated with the cooling water channels through the connecting grooves, and annular sealing grooves are formed in the side walls of the connecting grooves and used for improving the sealing performance of the front end cover and the rear end cover during installation.
5. The high-voltage asynchronous three-phase motor for a coal mining machine according to claim 4, wherein the isolator assembly comprises a limiting ring arranged between the static ring and the driving ring and used for limiting the position of the driving ring, and a steam blocking ring is arranged between the static ring and the driving ring and used for being matched with the oil seal to ensure the tightness of the bearing chamber.
6. The high-voltage asynchronous three-phase motor for the coal mining machine, according to claim 5, is characterized in that two ends of the rotating shaft are respectively sleeved with a bushing, the front end cover is in threaded connection with an inner end cover sleeved on the rotating shaft, the outer edge surface of the bushing is in contact with the inner circular surfaces of the corresponding inner end cover and the rear end cover, and one end, close to the bearing chamber, of the bushing is provided with an oil storage tank and an inclined chamfer structure for guiding lubricating grease to flow back to the bearing chamber.
7. The high-voltage asynchronous three-phase motor for a coal mining machine according to claim 1, wherein the centrifugal fan comprises a plurality of small fan blades and large fan blades which are alternately distributed, and the centrifugal fan is arranged on the rotating shaft through a spring retainer ring for a shaft.
8. The high-voltage asynchronous three-phase motor for the coal mining machine, as claimed in claim 1, wherein the front end cover is provided with an oil filling hole communicated with the bearing chamber and used for pumping and filling lubricating grease into the bearing chamber.
9. The high-voltage asynchronous three-phase motor for a coal mining machine according to claim 1, wherein a plurality of annular and axially distributed yoke oil holes are formed in one side, close to the rotating shaft, of the bushing, and the yoke oil holes are used for preventing lubricating grease from flowing into the machine base.
10. The high-voltage asynchronous three-phase motor for a coal mining machine according to claim 1, wherein a junction box communicated with the interior of the machine base is arranged at one end, close to the front end cover, of the machine base, a plurality of wiring terminals are arranged in the junction box, and one end of each wiring terminal is electrically connected with the winding stator core.

Description

High-voltage asynchronous three-phase motor for coal mining machine Technical Field The invention relates to the technical field of coal mining motors, in particular to a high-voltage asynchronous three-phase motor for a coal mining machine. Background In the global scope, underground coal mining equipment such as coal mining machine, development machine adopts low pressure power supply mostly, and the motor adopts 380V, 660V, 1140V and 3300V mostly, because special motor in colliery in the pit is limited by the influence such as operational environment is narrow and small and mounting means, to motor whole volume requirement strict, often motor compact structure, the complete machine power density is big, low pressure motor is from electrical clearance, creepage distance, main insulation, turn-to-turn insulation, straight line stretch length etc. all are less than 10KV motor far away, can increase iron core length as far as in the limited space, increase motor power, consequently be fit for present colliery underground motor. However, the underground power grid needs to reduce the 10kV voltage of the power grid to 3.3kV through a step-down transformer, the overall system investment is high, the fault rate is relatively high, along with the promotion of underground coal mining, some deep wells are thousands of meters, the power supply distance is long, if low-voltage power supply is still adopted, the power transmission capacity is increased by increasing the number of cables and increasing the section of the underground cables, so that the equipment investment is increased, the power supply system is complicated, the loss of a long-distance low-voltage power supply line is high, the terminal voltage drop is high, the electric energy compensation is necessary, the low-voltage power supply voltage conversion equipment is increased, and the loss is further increased. Meanwhile, the underground coal mine special motor is limited by a narrow working environment, strict requirements are usually set on the whole size of the motor, the motor power is increased by increasing the length of an iron core as much as possible in a limited space, most of motors are poor in dampproof performance under the humid and watery environment of the underground coal mine, moisture is easy to enter the motor to influence the working reliability of the motor, and in the narrow space, the motor generally only adopts a fan to simply dissipate heat, so that the motor is easy to be insufficient in heat dissipation, unstable factors appear when the motor runs, and the stable coal mining operation is not facilitated. Therefore, the invention discloses a high-voltage asynchronous three-phase motor for a coal mining machine, which solves the problems. Disclosure of Invention The invention mainly aims to provide a high-voltage asynchronous three-phase motor for a coal mining machine, which can effectively solve the technical problems in the background technology. The technical scheme adopted by the invention is that the high-voltage asynchronous three-phase motor for the coal mining machine comprises a machine base, a front end cover and a rear end cover, wherein a winding stator core is arranged in the machine base, the end part of the winding stator core is fixedly connected with the machine base through an epoxy resin glue seal, and a rotor is rotationally connected in the machine base through a rotating shaft; The bearing assembly comprises a bearing chamber which is arranged in the front end cover and the rear end cover, two ends of the rotating shaft are rotatably connected with the bearing chamber through bearings, the bearing chamber is provided with an isolator assembly which comprises a stationary ring fixedly connected with the bearing chamber, the rotating shaft is provided with a driving ring which is positioned in the stationary ring, and an oil seal is arranged between the stationary ring and the driving ring and used for improving the sealing effect; The cooling assembly comprises a plurality of cooling water channels arranged on two sides of the engine base, the cooling water channels on two sides are distributed in a staggered mode, a circulating water channel and a bearing chamber water channel are arranged on the front end cover and the rear end cover, the circulating water channel is communicated with the corresponding cooling water channel, the bearing chamber water channel is used for cooling the bearing assembly, and a centrifugal fan is arranged on the rotating shaft and used for cooling and radiating through cooperation of the cooling water channel and the epoxy resin glue seal. Preferably, the winding stator core is formed by stamping a plurality of stator punching sheets, and a plurality of circumferentially distributed vent holes are formed in the yoke parts of the stator punching sheets for improving the heat dissipation efficiency of the winding stator core. Preferably, the rotor is formed by punching a plurali