Explosion-proof three-phase asynchronous motor

Abstract

The anti-explosion three-phase asynchronous motor comprises a motor body, the motor body comprises a shell, a stator, a coil winding, a rotating shaft and a rotor, the stator, the coil winding, the rotating shaft and the rotor are installed in the shell, an oil storage ring is arranged on the side, close to the rotating shaft, of the stator, and a pair of oil guide pipes are fixedly connected between the oil storage ring and the stator; in the operation process, the circulating flow of the insulating oil among the stator, the coil winding and the oil storage ring is synchronously realized through the rotation of the rotating shaft, so that the insulating oil is cooled by itself and continuously cools the stator and the coil winding, and compared with the external operation of only depending on the shell heat dissipation and the fan in the prior art, the cooling efficiency is greatly improved. According to the invention, an internal heat dissipation means for cooling the interior of the stator and the coil winding is additionally added, the internal heat of the stator is effectively reduced, the long-term operation stability and the explosion-proof performance of the motor are improved, extra power equipment is not needed to drive the insulating oil to flow, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The present invention relates to a motor, in particular to an explosion-proof three-phase asynchronous motor used in the motor field. Background Art

[0002] A three-phase asynchronous motor is a type of induction motor that is powered by a 380V three-phase AC current (with a phase difference of 120 degrees). The rotor and stator rotating magnetic fields of a three-phase asynchronous motor rotate in the same direction but at different speeds, resulting in a slip rate. This is why it is called a three-phase asynchronous motor. Overheating is common during continuous operation, and higher temperatures can affect the lubrication, insulation, and operational stability of the motor, and may even burn out the motor. Existing technology typically involves dissipating fins on the motor surface to increase the contact area with the air, and dissipating a cooling fan on the rear end cover of the motor. The flowing air dissipates heat, thereby increasing heat dissipation efficiency. This is known as air cooling (or air cooling). However, it is difficult to achieve a good heat dissipation effect by relying solely on the aforementioned heat dissipation methods.

[0003] To address the above-mentioned issues, the specification of Chinese patent CN114374282B discloses a heat dissipation structure for a stator core and a motor. A plurality of oil passages are provided on the mounting boss of the stator core, so that the spaces on both sides of the mounting boss are connected through the oil passages. This allows the cooling medium flowing on the outer cylindrical surface of the stator core to pass through the oil passages, thereby allowing the cooling medium to flow through the entire outer cylindrical surface of the stator core, thereby increasing the flow area of ​​the cooling medium, cooling the stator core, and improving the heat dissipation effect of the motor.

[0004] Chinese patent CN118572917B discloses a heat dissipation mechanism for a DC motor stator and its installation method. A heat dissipation device is provided, heat dissipation holes are opened on the end face of the stator body, and a mounting base and heat dissipation pipe are combined to form an efficient heat conduction path. Driven by a micro water pump, insulating oil enters the heat dissipation pipe through a water inlet pipe. The heat dissipation pipe fits into the heat dissipation holes on the stator body, thereby absorbing heat generated by the stator body. The heat is then returned to the cooling water tank through a return pipe and dissipated through the cooling water tank and heat dissipation fins. This achieves rapid heat transfer and dissipation, effectively reduces the temperature of the stator body, and improves the operating stability and life of the DC motor.

[0005] Although the existing technology uses heat dissipation fins, heat dissipation fans or water cooling on the stator surface to dissipate heat from the motor, the heat dissipation effect is still insufficient. The internal structure of the stator and the coil winding are not effectively cooled, which makes it easy for the stator to have a temperature difference between the inside and outside. Summary of the Invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing heat dissipation means have not yet effectively cooled the interior of the stator and structures such as the coil winding, resulting in poor overall heat dissipation effect and a temperature difference between the inner and outer surfaces of the stator.

[0007] To solve the above problems, the present invention provides an explosion-proof three-phase asynchronous motor, comprising a motor body, the motor body comprising a housing, a stator, a coil winding, and a rotor mounted inside the housing, the rotor being rotatably disposed inside the stator, the front end of the rotor being fixedly connected to a rotating shaft extending to the outside of the housing, the inner end of the stator being provided with a plurality of evenly distributed grooves, and the coil windings being mounted inside the grooves;

[0008] An annular groove is also provided in the middle area of ​​the interior of the stator. The annular groove is located outside the groove and is connected to the groove. Oil guide grooves are provided on the upper and lower inner walls of the annular groove. An oil storage ring is provided on the side of the stator close to the rotating shaft. The outer end of the oil storage ring is fixedly connected to the inner wall of the housing. A pair of oil guide pipes are fixedly connected between the oil storage ring and the stator. The pair of oil guide pipes both pass through the interior of the stator and are respectively connected to the pair of oil guide grooves.

[0009] An oil storage cavity is provided inside the oil storage ring, and a pair of oil guide pipes pass through the oil storage ring until they are connected to the oil storage cavity. The oil storage cavity, oil guide pipe, annular groove and oil guide groove are all filled with insulating oil. An outer ring groove is provided at the end of the oil storage cavity away from the oil guide pipe. A transmission part is connected between the oil storage ring and the rotating shaft. The transmission part moves through the outer ring groove and extends to the inside of the oil storage cavity, and the transmission part is rotatably connected to the oil storage ring. A plurality of evenly distributed semiconductor refrigerators are fixedly connected to the outer end of the outer shell. The cold end of the semiconductor refrigerator is located on the inner side of the outer shell and is fixedly connected to the inside of the oil storage ring.

[0010] As a further supplement to the present application, the transmission part includes a ring plate, and a plurality of evenly distributed oil-displacing plates are fixedly connected to one end of the ring plate close to the oil storage ring. One end of the ring plate is rotatably connected to the inside of the outer ring groove, and the oil-displacing plate is rotatably connected to the inside of the oil storage cavity, and the four sides of the oil-displacing plate are in contact with the inner wall of the oil storage cavity.

[0011] As a further supplement to the present application, the inner end of the ring piece is fixedly connected to a plurality of evenly distributed gear teeth, and a gear 1 is coaxially arranged on the inner side of the ring piece, and the gear 1 is fixedly connected to the outer end of the rotating shaft, and a gear 2 is meshedly connected between the gear 1 and the gear teeth, and the inner end of the gear 2 is rotatably connected to a limit rod, and the limit rod is fixedly connected to the inner wall of the outer shell.

[0012] As a further supplement to the present application, a lower groove is provided on the inner ring wall of the oil storage cavity. The lower groove is located just above the center line of the oil storage ring, and the lower groove is connected to the oil guide pipe.

[0013] As a further supplement to the present application, an oil separator is provided between the stator and the rotor, and a strip groove is provided at the inner end of the oil separator, and a plurality of screw holes are provided on the inner wall of the strip groove. A plurality of screw grooves are provided at the inner end of the stator, and the screw grooves are located between an adjacent pair of grooves. Bolts are threadedly connected between the screw holes and the screw grooves, and the bolts are completely located on the inner side of the strip groove.

[0014] As a further supplement to this application, two groups of oil collecting ring grooves are provided at the outer end of the oil separator, and each group of oil collecting ring grooves has multiple numbers. The two groups of oil collecting ring grooves are respectively located on both sides of the screw hole. When the oil separator is installed on the inner end of the stator, the two groups of oil collecting ring grooves are respectively located on both sides of the annular groove.

[0015] As a further supplement to the present application, an oil sensor is fixedly connected to the interior of the oil collecting ring groove.

[0016] As a further supplement to the present application, a pair of thermal conductive muds are filled inside the grooves, and the thermal conductive muds are filled between the gaps of the coil windings, and the pair of thermal conductive muds are respectively located on both sides of the annular groove.

[0017] To sum up, during the operation of the present application, the rotation of the rotating shaft synchronously realizes the circulation of insulating oil between the stator, coil winding and oil storage ring, so that the insulating oil can cool itself and continuously cool the stator and coil winding. Compared with the external operation of relying solely on the heat dissipation of the shell and the heat dissipation of the fan in the prior art, the present application additionally adds an internal heat dissipation means to cool the interior of the stator and the coil winding, effectively reducing the internal heat of the stator, improving the operating efficiency, stability, explosion-proof performance and service life of the present application, and no additional power equipment is required to drive the flow of insulating oil, thereby achieving energy-saving effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Partial cross-sectional perspective views of the first and second embodiments of the present application;

[0019] Figure 2 This is an overall three-dimensional diagram of the first and second embodiments of the present application;

[0020] Figure 3 The local three-dimensional embodiment of the first and second embodiments of this application Figure 1 ;

[0021] Figure 4 The local three-dimensional embodiment of the first and second embodiments of this application Figure 2 ;

[0022] Figure 5 The local explosion of the first and second embodiments of this application Figure 1 ;

[0023] Figure 6 The local explosion of the first and second embodiments of this application Figure 2 ;

[0024] Figure 7 The local three-dimensional embodiment of the first and second embodiments of this application Figure 3 ;

[0025] Figure 8 A partial cross-sectional perspective view of the stator of the first and second embodiments of the present application;

[0026] Figure 9 This is a schematic diagram of the front structure of the stator according to the first and second embodiments of the present application;

[0027] Figure 10 This is a front structural schematic diagram of the insulating oil flowing in the stator in the first and second embodiments of the present application;

[0028] Figure 11 The three-dimensional structure of the transmission member and the oil storage ring in the first and second embodiments of this application Figure 1 ;

[0029] Figure 12 The three-dimensional structure of the transmission member and the oil storage ring in the first and second embodiments of this application Figure 2 ;

[0030] Figure 13 This is a three-dimensional diagram of the transmission member, oil storage ring and oil guide pipe in the first and second embodiments of the present application;

[0031] Figure 14 This is a front structural schematic diagram of the insulating oil flowing in the oil storage ring in the first and second embodiments of the present application.

[0032] Description of the numbers in the figure:

[0033] 1 Motor body, 101 housing, 102 stator, 103 coil winding, 104 shaft, 105 rotor, 106 groove, 107 screw groove, 108 annular groove, 109 oil guide groove, 2 semiconductor cooler, 3 oil storage ring, 301 outer ring groove, 302 oil storage cavity, 303 lower groove, 4 oil guide pipe, 5 transmission part, 51 ring plate, 52 oil drive plate, 53 gear teeth, 54 gear 2, 55 gear 1, 6 oil separator, 601 strip groove, 602 screw hole, 603 oil collecting ring groove, 7 bolts, 8 thermal paste. DETAILED DESCRIPTION

[0034] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0035] The first implementation method:

[0036] The present invention provides an explosion-proof three-phase asynchronous motor. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , including a motor body 1, the motor body 1 includes a shell 101 and a stator 102, a coil winding 103 and a rotor 105 installed inside the shell 101, the rotor 105 is rotatably arranged on the inner side of the stator 102, and the front end of the rotor 105 is fixedly connected to a rotating shaft 104 extending to the outside of the shell 101. The inner end of the stator 102 is provided with a plurality of evenly distributed grooves 106, and the coil winding 103 is installed inside the grooves. The above structure is the basic structure of the existing three-phase asynchronous motor. When in use, the coil winding 103 is energized to generate a selected magnetic field, driving the rotor 105 to drive the rotating shaft 104 to rotate together along the direction of the magnetic field.

[0037] See also Figure 7 and Figure 8 , an annular groove 108 is also provided in the middle area of ​​the interior of the stator 102. The annular groove 108 is located outside the groove 106 and is connected thereto. The upper and lower inner walls of the annular groove 108 are provided with oil guide grooves 109. An oil storage ring 3 is provided on the side of the stator 102 close to the rotating shaft 104. The outer end of the oil storage ring 3 is fixedly connected to the inner wall of the housing 101. A pair of oil guide pipes 4 are fixedly connected between the oil storage ring 3 and the stator 102. The pair of oil guide pipes 4 pass through the interior of the stator 102 and are respectively connected to the pair of oil guide grooves 109. An oil storage cavity 302 is provided inside the oil storage ring 3. A pair of oil guide pipes 4 pass through the oil storage The interior of the ring 3 is connected to the oil storage chamber 302. The interior of the oil storage chamber 302, the oil guide pipe 4, the annular groove 108 and the oil guide groove 109 are all filled with insulating oil. The outer end of the shell 101 is fixedly connected to a plurality of evenly distributed semiconductor refrigerators 2. The cold end of the semiconductor refrigerator 2 is located on the inner side of the shell 101 and is fixedly connected to the interior of the oil storage ring 3. The hot end of the semiconductor refrigerator 2 is located outside. The semiconductor refrigerator 2 cools the oil storage ring 3. The oil storage ring 3 is made of high thermal conductivity materials, such as graphite materials, metal materials, etc., so that the insulating oil inside the oil storage chamber 302 is gradually cooled.

[0038] Combine Figure 7 、 Figure 12 and Figure 13 As shown, the oil storage cavity 302, the oil guide pipe 4, the annular groove 108 and the oil guide groove 109 can form a closed loop channel for the circulation of insulating oil. Figure 9 and Figure 10As shown, the insulating oil in the upper oil guide groove 109 will automatically flow downward along the annular groove 108. Since the annular groove 108 is connected to the groove 106, the insulating oil will enter the groove 106 and immerse the local position of the coil winding 103, thereby performing heat exchange and cooling on the coil winding 103 and the stator 102 itself. After flowing from top to bottom, the insulating oil will eventually enter the lower oil guide groove 109, and then enter the oil storage chamber 302 through the lower oil guide pipe 4 for cooling. Subsequently, after being driven by the oil-displacing plate 52 to rotate from bottom to top in the oil storage chamber 302, it will enter the upper oil guide groove 109 again through the upper oil guide pipe 4, realizing re-circulation flow and continuously performing heat exchange and cooling on the coil winding 103.

[0039] See also Figure 4 and Figure 5 An oil separator 6 is provided between the stator 102 and the rotor 105. In this embodiment, the oil separator 6 can be fixedly connected to the inner end of the stator 102, and the rotor 105 is rotatably connected to the inner end of the oil separator 6. The setting of the oil separator 6 isolates the insulating oil entering the groove 106, making it difficult for it to flow onto the rotor 105 and into the rotating gap, effectively ensuring the circulation of the insulating oil. Moreover, the oil separator 6 is a thin cylindrical structure made of non-magnetic material, which is not easy to affect the magnetic field induction between the coil winding 103 and the rotor 105.

[0040] See also Figure 11 and Figure 12 The oil storage chamber 302 is provided with an outer ring groove 301 at one end away from the oil guide pipe 4. A transmission member 5 is connected between the oil storage ring 3 and the rotating shaft 104. The transmission member 5 moves through the outer ring groove 301 and extends into the oil storage chamber 302, and the transmission member 5 is rotatably connected to the oil storage ring 3. The transmission member 5 includes a ring piece 51. The end of the ring piece 51 close to the oil storage ring 3 is fixedly connected to a plurality of evenly distributed oil-displacing pieces 52. One end of the ring piece 51 is rotatably connected to the inside of the outer ring groove 301. The oil-displacing piece 52 is rotatably connected to the inside of the oil storage chamber 302, and the four sides of the oil-displacing piece 52 are in contact with the inner wall of the oil storage chamber 302. The inner and outer ring walls of the outer ring groove 301 are evenly connected. A sealing ring (not shown) is fixedly connected, and the ring piece 51 is rotatably connected to the inside of the sealing ring, which effectively improves the sealing between the ring piece 51 and the outer ring groove 301, so that the insulating oil is not easy to overflow from the rotating gap between the two. The inner end of the ring piece 51 is fixedly connected to a plurality of evenly distributed gear teeth 53, and a gear 1 55 is coaxially arranged on the inner side of the ring piece 51. The gear 1 55 is fixedly connected to the outer end of the rotating shaft 104, and the gear 2 54 is meshed with the gear 53. The inner end of the gear 2 54 is rotatably connected to a limit rod, and the limit rod is fixedly connected to the inner wall of the shell 101. The setting of the limit rod allows the gear 2 54 to rotate stably.

[0041] Combine Figure 4 and Figure 11As shown, when the motor starts running, the shaft 104 rotates, which will drive the gear 1 55 to rotate synchronously. After the gear 2 54 and the gear 53 are sequentially driven, the ring plate 51 rotates along the inner side of the outer ring groove 301, and the oil-displacing plate 52 rotates in the oil storage chamber 302. Figure 12 、 Figure 13 and Figure 14 As shown, the previous text records that the insulating oil will enter the oil storage chamber 302 through the lower oil guide pipe 4. As the oil-displacing plate 52 continues to rotate, the insulating oil will be stored in sequence between adjacent oil-displacing plates 52. As the oil-displacing plate 52 rotates, it is driven upward clockwise or counterclockwise. When the insulating oil between adjacent oil-displacing plates 52 is driven to the upper side of the oil storage chamber 302, part of the insulating oil will enter the upper oil guide pipe 4, and then enter the oil guide groove 109 and the annular groove 108, continuously exchanging heat and cooling the coil winding 103 and the stator 102. After heat exchange, the insulating oil flows from top to bottom, passes through the lower oil guide groove 109 and the oil guide pipe 4, and returns to the oil storage chamber 302 again. The insulating oil exchanges heat with the oil storage ring 3, realizes its own cooling, and continues to be driven upward by the oil-displacing plate 52.

[0042] See also Figure 8 The interior of the groove 106 is filled with a pair of thermal conductive muds 8, and the thermal conductive muds 8 are filled between the gaps of the coil windings 103. A pair of thermal conductive muds 8 are respectively located on both sides of the annular groove 108. The thermal conductive mud 8 can be made of epoxy resin thermal conductive mud, which will gradually solidify after filling to form an elastomer. Through the filling of the thermal conductive mud 8, the two sides of the groove 106 are effectively blocked. When the insulating oil in the annular groove 108 enters the middle area of ​​the groove 106, it may flow laterally along the coil winding 103 and overflow to the outside of the stator 102. Therefore, through the filling of the thermal conductive mud 8, after solidification, it effectively blocks the gap between the groove 106 and the outer wall of the thermal conductive mud 8 and the coil winding 103, making it difficult for the insulating oil to flow laterally. Instead, it flows smoothly downward along the annular groove 108 to achieve circulating flow. In addition, the thermal conductive mud 8 also has good thermal conductivity and is not likely to hinder the heat dissipation of the coil winding 103.

[0043] See also Figure 11 , gear 1 55, gear 2 54 and gear teeth 53 not only form a transmission mechanism to transmit the rotational power of the rotating shaft 104 to the ring piece 51 and the oil-displacing piece 52, but also achieve a speed reduction effect, which is equivalent to the rotating shaft 104 rotating one circle, driving the ring piece 51 to rotate 3-5 circles (the specific deceleration amplitude is determined by the gear ratio of gear 1 55, gear 2 54 and gear teeth 53, such as: gear 1 55 and gear 2 54 have the same number of teeth, and the number of teeth of gear 2 54 is one-fourth of the number of gear teeth 53, then the rotating shaft 104 rotates four circles, which can drive the ring piece 51 to rotate one circle), so that the rotation speed of the ring piece 51 and the oil-displacing piece 52 is not easy to be too fast, which facilitates the smooth flow of insulating oil.

[0044] See also Figure 12 、 Figure 13 and Figure 14 A lower groove 303 is provided on the inner ring wall of the oil storage cavity 302. The lower groove 303 is located just above the center line of the oil storage ring 3, and the lower groove 303 is connected to the oil guide pipe 4. The setting of the lower groove 303 provides a downward channel for the insulating oil to flow smoothly into the upper oil guide pipe 4. When the insulating oil is pushed to the highest point of the oil storage cavity 302 by the oil-displacing sheet 52, under the action of its own weight, a part of the insulating oil will automatically flow horizontally and directly enter the oil guide pipe 4, and a part of the insulating oil will actively fill the lower groove 303 and then enter the oil guide pipe 4 through the lower groove 303 (a small part of the insulating oil will not have time to enter the lower groove 303 and the oil guide pipe 4 and will remain in the oil storage cavity 302), effectively realizing the circulation of the insulating oil, that is, effectively realizing the continuous cooling process of the stator 102 and the coil winding 103.

[0045] In summary, during the operation of the present application, the circulation of the insulating oil is synchronously achieved through the rotation of the rotating shaft 104, so that the insulating oil can cool itself and continuously cool the stator 102 and the coil winding 103. Compared with the external operation of simply relying on the heat dissipation of the shell 101 and the heat dissipation of the fan in the prior art, the present application adds an internal heat dissipation means for cooling the inside of the stator 102 and the coil winding 103 on the basis of the above-mentioned heat dissipation and air cooling, which effectively reduces the internal heat of the stator 102 and improves the operating efficiency, stability, explosion-proof performance and service life of the present application.

[0046] Second implementation method:

[0047] On the basis of the first embodiment, this embodiment adopts a detachable connection for the oil separator 6 instead of the fixed connection in the first embodiment, and adds the arrangement of bolts 7 and thermal mud 8, as follows: Figure 5 、 Figure 6 and Figure 8 , a strip groove 601 is provided at the inner end of the oil separator 6, and a plurality of screw holes 602 are provided on the inner wall of the strip groove 601, and a plurality of screw grooves 107 are provided at the inner end of the stator 102, and the screw groove 107 is located between an adjacent pair of grooves 106, and a bolt 7 is threadedly connected between the screw hole 602 and the screw groove 107, and the bolt 7 is completely located on the inner side of the strip groove 601, and the outer diameter of the oil separator 6 is the same as the inner diameter of the stator 102. After the coil winding 103 is installed, the oil separator 6 is inserted into the interior of the stator 102 and fits it therewith, and the plurality of screw holes 602 are respectively corresponding to the plurality of screw grooves 107, and then the bolt 7 is passed through the screw hole 602 and connected to the screw groove 107 to realize the installation of the oil separator 6 and the stator 102. The setting of the strip groove 601 provides a placement space for the head of the bolt, so that the head of the bolt is not easy to protrude to the inner surface of the oil separator 6, and is not easy to cause obstruction to the placement of the rotor 105.

[0048] See also Figure 6 and Figure 8 Two groups of oil collecting ring grooves 603 are provided at the outer end of the oil separator 6, and the number of each group of oil collecting ring grooves 603 is multiple. The two groups of oil collecting ring grooves 603 are respectively located on both sides of the screw hole 602. When the oil separator 6 is installed on the inner end of the stator 102, the two groups of oil collecting ring grooves 603 are respectively located on both sides of the annular groove 108. The interior of the oil collecting ring groove 603 is fixedly connected to an oil sensor (not shown in the figure).

[0049] Since the inner ends of the oil separator 6 and the stator 102 are fitted together, under normal circumstances, the insulating oil is not easy to overflow to the outside through the gap between the two. Therefore, the freely detachable oil separator 6 of this application can still isolate the insulating oil and allow it to circulate. At the same time, through the setting of the oil sensor, the overflow of the insulating oil can be effectively monitored. The oil sensor is connected to the external monitoring terminal. When the oil sensor detects the presence of insulating oil, it indicates that it has penetrated into the gap between the oil separator 6 and the stator 102. Through the early warning of the external monitoring terminal, the application can be inspected and repaired in time before the insulating oil overflows into the inside of the shell 101 and affects its operation.

[0050] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An explosion-proof three-phase asynchronous motor, comprising a motor body (1), the motor body (1) comprising a housing (101) and a stator (102), a coil winding (103) and a rotor (105) mounted inside the housing (101), the rotor (105) being rotatably arranged inside the stator (102), the front end of the rotor (105) being fixedly connected to a rotating shaft (104) extending to the outside of the housing (101), the inner end of the stator (102) being provided with a plurality of evenly distributed grooves (106), the coil winding (103) being mounted inside the grooves, and characterized in that: An annular groove (108) is further provided in the middle area of ​​the interior of the stator (102), and the annular groove (108) is located outside the groove (106) and communicated therewith. The upper and lower inner walls of the annular groove (108) are both provided with oil guide grooves (109). An oil storage ring (3) is provided on the side of the stator (102) close to the rotating shaft (104), and the outer end of the oil storage ring (3) is fixedly connected to the inner wall of the housing (101). A pair of oil guide pipes (4) are fixedly connected between the oil storage ring (3) and the stator (102), and the pair of oil guide pipes (4) both pass through the interior of the stator (102) and are respectively communicated with the pair of oil guide grooves (109). An oil storage cavity (302) is provided inside the oil storage ring (3), and a pair of oil guide pipes (4) are both passed through the interior of the oil storage ring (3) until they are communicated with the oil storage cavity (302). The interiors of the oil storage cavity (302), the oil guide pipe (4), the annular groove (108) and the oil guide groove (109) are all filled with insulating oil. An outer ring groove (301) is provided at one end of the oil storage cavity (302) away from the oil guide pipe (4). A transmission member (5) is connected between the oil storage ring (3) and the rotating shaft (104). The transmission member (5) is movable through the outer ring groove (301) and extends into the interior of the oil storage cavity (302), and the transmission member (5) is rotatably connected to the oil storage ring (3). The outer end of the housing (101) is fixedly connected to a plurality of uniformly distributed semiconductor refrigerators (2). The cold end of the semiconductor refrigerator (2) is located on the inner side of the housing (101) and is fixedly connected to the interior of the oil storage ring (3).

2. The explosion-proof three-phase asynchronous motor according to claim 1, characterized in that: The transmission member (5) comprises an annular plate (51), one end of the annular plate (51) close to the oil storage ring (3) is fixedly connected to a plurality of evenly distributed oil-displacing plates (52), one end of the annular plate (51) is rotatably connected to the interior of the outer ring groove (301), and the oil-displacing plates (52) are rotatably connected to the interior of the oil storage cavity (302), and the four sides of the oil-displacing plates (52) are in contact with the inner wall of the oil storage cavity (302).

3. The explosion-proof three-phase asynchronous motor according to claim 2, characterized in that: The inner end of the ring plate (51) is fixedly connected to a plurality of evenly distributed gear teeth (53), and a gear 1 (55) is coaxially arranged on the inner side of the ring plate (51). The gear 1 (55) is fixedly connected to the outer end of the rotating shaft (104), and a gear 2 (54) is meshed between the gear 1 (55) and the gear teeth (53). The inner end of the gear 2 (54) is rotatably connected to a limit rod, and the limit rod is fixedly connected to the inner wall of the housing (101).

4. The explosion-proof three-phase asynchronous motor according to claim 1, characterized in that: A lower groove (303) is provided on the inner wall of the oil storage cavity (302). The lower groove (303) is located just above the center line of the oil storage ring (3), and the lower groove (303) is communicated with the oil guide pipe (4).

5. The explosion-proof three-phase asynchronous motor according to claim 1, characterized in that: An oil separator (6) is provided between the stator (102) and the rotor (105), the inner end of the oil separator (6) is provided with a strip groove (601), the inner wall of the strip groove (601) is provided with a plurality of screw holes (602), the inner end of the stator (102) is provided with a plurality of screw grooves (107), the screw grooves (107) are located between a pair of adjacent grooves (106), a bolt (7) is threadedly connected between the screw hole (602) and the screw groove (107), and the bolt (7) is completely located on the inner side of the strip groove (601).

6. The explosion-proof three-phase asynchronous motor according to claim 5, characterized in that: The outer end of the oil separator (6) is provided with two groups of oil collecting ring grooves (603), and each group of oil collecting ring grooves (603) has a plurality of oil collecting ring grooves. The two groups of oil collecting ring grooves (603) are respectively located on both sides of the screw hole (602). When the oil separator (6) is installed on the inner end of the stator (102), the two groups of oil collecting ring grooves (603) are respectively located on both sides of the annular groove (108).

7. The explosion-proof three-phase asynchronous motor according to claim 6, characterized in that: An oil sensor is fixedly connected to the interior of the oil collecting ring groove (603).

8. The explosion-proof three-phase asynchronous motor according to claim 1, characterized in that: The groove (106) is filled with a pair of heat-conducting muds (8), and the heat-conducting muds (8) are filled between the gaps of the coil windings (103). The pair of heat-conducting muds (8) are respectively located on both sides of the annular groove (108).

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