An explosion-proof three-phase asynchronous motor

Abstract

The application relates to an explosion-proof three-phase asynchronous motor applied to the field of motors, which comprises a motor body, the motor body comprises a shell and a stator, a coil winding, a rotating shaft and a rotor which are arranged in the shell, an oil storage ring is arranged on the side of the stator close to the rotating shaft, and a pair of oil guide pipes are fixedly connected between the oil storage ring and the stator. In the process of running, the rotation of the rotating shaft synchronously realizes the circulating flow of insulating oil among the stator, the coil winding and the oil storage ring, so that the insulating oil is cooled and the stator and the coil winding are continuously cooled. Compared with the external operation of simply relying on shell heat dissipation and a fan in the prior art, the application additionally increases the internal heat dissipation means for cooling the stator and the coil winding, effectively reduces the heat in the stator, improves the long-term operation stability and explosion-proof performance of the application, and does not need additional power equipment to drive the flow of insulating oil, so that the energy-saving effect is achieved.

Description

Technical Field

[0001] This invention relates to an electric motor, and more particularly to an explosion-proof three-phase asynchronous motor for use in the field of electric motors. Background Technology

[0002] Three-phase asynchronous motors are a type of induction motor that are powered by three-phase AC current (120-degree phase difference) connected to the motor simultaneously. Because the rotor and stator rotating magnetic fields of a three-phase asynchronous motor rotate in the same direction but at different speeds, there is slip, hence the name three-phase asynchronous motor. During continuous operation, the motor is prone to overheating. High temperatures can also affect the internal lubrication, insulation, and operational stability of the motor, and may even burn out the motor. Current technology usually involves setting heat dissipation fins on the motor surface to increase the contact area with air, and installing a cooling fan on the rear end cover of the motor. The flowing air carries away the heat, thereby increasing the heat dissipation efficiency. This is called air cooling. However, relying solely on the above heat dissipation methods is difficult to achieve a good heat dissipation effect.

[0003] To address the aforementioned issues, Chinese patent CN114374282B discloses a heat dissipation structure for a stator core and a motor. Multiple oil passages are provided on the mounting boss of the stator core, connecting the spaces on both sides of the mounting boss. This allows the cooling medium flowing on the outer surface of the stator core to pass through the oil passages, enabling the cooling medium to flow across the entire outer surface of the stator core. This increases the flow area of ​​the cooling medium, cools the stator core, and improves the motor's heat dissipation effect.

[0004] Chinese patent CN118572917B discloses a heat dissipation mechanism for a DC motor stator and its installation method. By setting up a heat dissipation device, heat dissipation holes are opened on the end face of the stator body, and combined with a mounting base and heat dissipation pipes, an efficient heat conduction path is formed. Insulating oil, driven by a micro water pump, enters the heat dissipation pipes through the inlet pipe. The heat dissipation pipes are in contact with the heat dissipation holes on the stator body, thus absorbing the heat generated by the stator body. The heat then flows back to the cooling water tank through the return pipe, where it is dissipated through the cooling water tank and heat dissipation fins. This achieves rapid heat transfer and dissipation, effectively reducing the temperature of the stator body and improving the operational stability and lifespan of the DC motor.

[0005] Although existing technologies employ methods such as heat dissipation fins, cooling fans, or water cooling of 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 windings are not effectively cooled, making it easy for temperature differences to exist between the inside and outside of the stator. Summary of the Invention

[0006] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that existing heat dissipation methods have not effectively cooled the internal structure of the stator and the coil windings, resulting in poor overall heat dissipation 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, including a motor body, the motor body including a housing and a stator, coil windings and a rotor installed 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, and the inner end of the stator having a plurality of evenly distributed grooves, the coil windings being installed inside the grooves.

[0008] An annular groove is also provided in the middle area of ​​the stator. The annular groove is located outside the groove and is connected to it. 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 near the rotating shaft. The outer end of the oil storage ring is fixedly connected to the inner wall of the outer shell. A pair of oil guide pipes are fixedly connected between the oil storage ring and the stator. The pair of oil guide pipes pass through the interior of the stator and are respectively connected to a pair of oil guide grooves.

[0009] An oil storage chamber is formed inside the oil storage ring. A pair of oil guide tubes pass through the inside of the oil storage ring and are connected to the oil storage chamber. The oil storage chamber, oil guide tubes, annular groove and oil guide groove are all filled with insulating oil. An outer annular groove is formed at the end of the oil storage chamber away from the oil guide tube. A transmission component is connected between the oil storage ring and the rotating shaft. The transmission component moves through the outer annular groove and extends into the oil storage chamber. The transmission component is rotatably connected to the oil storage ring. Multiple evenly distributed semiconductor coolers are fixedly connected to the outer end of the outer shell. The cold end of the semiconductor cooler is located inside the outer shell and is fixedly connected to the inside of the oil storage ring.

[0010] As a further supplement to this application, the transmission component includes a ring plate, with a plurality of evenly distributed oil-driving plates fixedly connected to one end of the ring plate near the oil storage ring. One end of the ring plate is rotatably connected to the inside of the outer ring groove, and the oil-driving plates are rotatably connected to the inside of the oil storage cavity, with the periphery of the oil-driving plates adhering to the inner wall of the oil storage cavity.

[0011] As a further supplement to this application, the inner end of the ring is fixedly connected with a plurality of evenly distributed gear teeth, and a gear one is coaxially arranged on the inner side of the ring. The gear one is fixedly connected to the outer end of the rotating shaft. A gear two is meshed between the gear one and the gear teeth. A limit rod is rotatably connected to the inner end of the gear two. The limit rod is fixedly connected to the inner wall of the outer shell.

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

[0013] As a further supplement to this application, an oil separator is provided between the stator and the rotor. The inner end of the oil separator is provided with a strip groove, and the inner wall of the strip groove is provided with multiple screw holes. The inner end of the stator is provided with multiple screw grooves, which 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 inside the strip grooves.

[0014] As a further supplement to this application, the outer end of the oil separator is provided with two sets of oil collecting ring grooves, each set of oil collecting ring grooves having multiple grooves. The two sets of oil collecting ring grooves are located on both sides of the screw hole. When the oil separator is installed on the inner end of the stator, the two sets of oil collecting ring grooves are located on both sides of the annular groove.

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

[0016] As a further supplement to this application, the interior of the groove is filled with a pair of thermally conductive mud, and the thermally conductive mud fills the gaps between the coil windings, with the pair of thermally conductive mud located on both sides of the annular groove.

[0017] In summary, during operation, this application achieves synchronous circulation of insulating oil between the stator, coil windings, and oil reservoir rings through the rotation of the shaft. This allows the insulating oil to cool itself and continuously cool the stator and coil windings. Compared to existing technologies that rely solely on external cooling methods such as casing and fan cooling, this application adds an internal cooling method to cool the stator and coil windings, effectively reducing internal heat and improving the operating efficiency, stability, explosion-proof performance, and service life of this application. Furthermore, it eliminates the need for additional electrical equipment to drive the insulating oil flow, achieving energy savings. Attached Figure Description

[0018] Figure 1 These are partial cross-sectional perspective views of the first and second embodiments of this application;

[0019] Figure 2 These are overall perspective views of the first and second embodiments of this application;

[0020] Figure 3 Partial three-dimensional representations of the first and second embodiments of this application Figure 1 ;

[0021] Figure 4 Partial three-dimensional representations of the first and second embodiments of this application Figure 2 ;

[0022] Figure 5 Local explosions in the first and second embodiments of this application Figure 1 ;

[0023] Figure 6 Local explosions in the first and second embodiments of this application Figure 2 ;

[0024] Figure 7 Partial three-dimensional representations of the first and second embodiments of this application Figure 3 ;

[0025] Figure 8 This is a partial cross-sectional perspective view of the stator in the first and second embodiments of this application;

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

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

[0028] Figure 11 The three-dimensional representation of the transmission component and the oil reservoir ring in the first and second embodiments of this application. Figure 1 ;

[0029] Figure 12 The three-dimensional representation of the transmission component and the oil reservoir ring in the first and second embodiments of this application. Figure 2 ;

[0030] Figure 13 This is a perspective view of the transmission component, oil reservoir ring, and oil guide pipe in the first and second embodiments of this application;

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

[0032] Explanation of the labels in the diagram:

[0033] 1. Motor body, 101. Housing, 102. Stator, 103. Coil winding, 104. Shaft, 105. Rotor, 106. Groove, 107. Threaded groove, 108. Annular groove, 109. Oil guide groove, 2. Semiconductor cooler, 3. Oil storage ring, 301. Outer annular groove, 302. Oil storage cavity, 303. Lower groove, 4. Oil guide pipe, 5. Transmission component, 51. Ring plate, 52. Oil driving plate, 53. Gear teeth, 54. Gear II, 55. Gear I, 6. Oil separator, 601. Strip groove, 602. Threaded hole, 603. Oil collecting ring groove, 7. Bolt, 8. Heat-conducting putty. Detailed Implementation

[0034] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] Implementation method 1:

[0036] This invention provides an explosion-proof three-phase asynchronous motor; please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The motor body 1 includes a housing 101 and a stator 102, a coil winding 103, and a rotor 105 installed inside the housing 101. The rotor 105 is rotatably disposed inside the stator 102. A rotating shaft 104 extending to the outside of the housing 101 is fixedly connected to the front end of the rotor 105. Multiple evenly distributed grooves 106 are opened at the inner end of the stator 102. 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 selective magnetic field, which drives the rotor 105 to drive the rotating shaft 104 to rotate together along the direction of the magnetic field.

[0037] Please see Figure 7 and Figure 8 An annular groove 108 is formed in the middle area of ​​the stator 102. The annular groove 108 is located outside the groove 106 and communicates with it. Oil guide grooves 109 are formed on the upper and lower inner walls of the annular groove 108. An oil storage ring 3 is provided on the side of the stator 102 near the rotating shaft 104. The outer end of the oil storage ring 3 is fixedly connected to the inner wall of the outer shell 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 communicate with the pair of oil guide grooves 109 respectively. An oil storage cavity 302 is formed inside the oil storage ring 3. The pair of oil guide pipes 4 pass through the oil storage cavity 302. The interior of ring 3 is connected to the oil storage chamber 302. The interior of oil storage chamber 302, oil guide pipe 4, annular groove 108 and oil guide groove 109 are all filled with insulating oil. Multiple evenly distributed semiconductor coolers 2 are fixedly connected to the outer end of the outer shell 101. The cold end of the semiconductor cooler 2 is located inside the outer shell 101 and is fixedly connected to the interior of the oil storage ring 3. The hot end of the semiconductor cooler 2 is located outside. The semiconductor cooler 2 cools the oil storage ring 3. The oil storage ring 3 is made of a material with high thermal conductivity, such as graphite or metal, which gradually cools the insulating oil inside the oil storage chamber 302.

[0038] Combination Figure 7 , Figure 12 and Figure 13 As shown, the oil storage chamber 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 a part of the coil winding 103, thus exchanging heat and cooling 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 rotation of the oil driving plate 52 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 the circulation again and continuously exchanging heat and cooling the coil winding 103.

[0039] Please see 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 oil separator 6 plays a role in isolating the insulating oil entering the groove 106, making it difficult for it to flow onto the rotor 105 and into the rotation gap, effectively ensuring the circulation of the insulating oil. Furthermore, the oil separator 6 is a thin cylindrical structure made of non-magnetic material, which is not likely to affect the magnetic field induction between the coil winding 103 and the rotor 105.

[0040] Please see Figure 11 and Figure 12 An outer annular groove 301 is provided at the end of the oil storage cavity 302 away from the oil guide pipe 4. A transmission component 5 is connected between the oil storage ring 3 and the rotating shaft 104. The transmission component 5 moves through the outer annular groove 301 and extends into the oil storage cavity 302. The transmission component 5 is rotatably connected to the oil storage ring 3. The transmission component 5 includes a ring plate 51. A plurality of evenly distributed oil-driving plates 52 are fixedly connected to one end of the ring plate 51 near the oil storage ring 3. One end of the ring plate 51 is rotatably connected to the inside of the outer annular groove 301. The oil-driving plates 52 are rotatably connected to the inside of the oil storage cavity 302, and the periphery of the oil-driving plates 52 is in contact with the inner wall of the oil storage cavity 302. The inner and outer ring walls of the outer annular groove 301 are evenly connected to the inner wall of the oil storage cavity 302. A sealing ring (not shown in the figure) is fixedly connected, and the ring plate 51 is rotatably connected to the inside of the sealing ring, which effectively improves the sealing performance between the ring plate 51 and the outer ring groove 301, making it difficult for insulating oil to overflow from the rotation gap between the two. Multiple evenly distributed gear teeth 53 are fixedly connected to the inner end of the ring plate 51. 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. A gear 2 54 is meshed between the gear 1 55 and the gear teeth 53. A limit rod is rotatably connected to the inner end of the gear 2 54. The limit rod is fixedly connected to the inner wall of the outer shell 101. The setting of the limit rod allows the gear 2 54 to rotate stably.

[0041] Combination Figure 4 and Figure 11As shown, when the motor starts running, the rotating shaft 104 rotates, which drives the first gear 55 to rotate synchronously. After being driven by the second gear 54 and the gear teeth 53 in sequence, the ring plate 51 rotates along the inner side of the outer ring groove 301, and the oil driving plate 52 rotates in the oil storage chamber 302; combined with Figure 12 , Figure 13 and Figure 14 As shown above, the insulating oil enters the oil storage chamber 302 through the lower oil guide pipe 4. As the oil driving plate 52 rotates continuously, the insulating oil is stored between adjacent oil driving plates 52. With the rotation of the oil driving plate 52, it is driven upward clockwise or counterclockwise. When the insulating oil between adjacent oil driving plates 52 is driven to the uppermost side of the oil storage chamber 302, some 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 to continuously exchange heat and cool 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. The insulating oil exchanges heat with the oil storage ring 3, achieving its own cooling while continuing to be driven upward by the oil driving plate 52.

[0042] Please see Figure 8 The groove 106 is filled with a pair of thermally conductive mud 8, which fills the gaps between the coil windings 103. The pair of thermally conductive mud 8 are located on both sides of the annular groove 108. The thermally conductive mud 8 can be epoxy resin-based thermally conductive mud, which will gradually solidify after filling to form an elastomer. The filling of the thermally conductive mud 8 effectively seals both sides of the groove 106. When the insulating oil in the annular groove 108 enters the middle area of ​​the groove 106, it may flow laterally along the coil windings 103 and overflow to the outside of the stator 102. Therefore, the filling of the thermally conductive mud 8, after solidification, effectively seals the gaps between the groove 106 and the outer wall of the thermally conductive mud 8, as well as the gaps between the coil windings 103, making it difficult for the insulating oil to flow laterally. Instead, it flows smoothly downward along the annular groove 108 to achieve circulation. In addition, the thermally conductive mud 8 also has good thermal conductivity and does not easily hinder the heat dissipation of the coil windings 103.

[0043] Please see Figure 11 Gear 55, gear 54, and gear 53 not only form a transmission mechanism that transmits the rotational power of the shaft 104 to the ring plate 51 and the oil-driving plate 52, but also achieve a speed reduction effect. This is equivalent to the shaft 104 rotating 1 revolution and driving the ring plate 51 to rotate 3-5 revolutions (the specific speed reduction is determined by the ratio of the number of teeth of gear 55, gear 54, and gear 53. For example, if gear 55 and gear 54 have the same number of teeth, and the number of teeth of gear 54 is one-quarter of the number of teeth of gear 53, then the shaft 104 rotates 4 revolutions and drives the ring plate 51 to rotate 1 revolution). This makes it difficult for the rotational speed of the ring plate 51 and the oil-driving plate 52 to be too fast, which facilitates the smooth flow of insulating oil.

[0044] Please see Figure 12 , Figure 13 and Figure 14 A lower groove 303 is provided on the inner wall of the oil storage cavity 302. The lower groove 303 is located directly above the center line of the oil storage ring 3 and is connected to the oil guide pipe 4. 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 driving plate 52, under its own weight, a part of the insulating oil will automatically flow laterally and directly enter the oil guide pipe 4, while 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 remain in the oil storage cavity 302 if it does not have time to enter the lower groove 303 and the oil guide pipe 4). This effectively realizes the circulation of the insulating oil, that is, effectively realizes the continuous cooling process of the stator 102 and the coil winding 103.

[0045] In summary, during operation, this application achieves synchronous circulation of insulating oil through the rotation of the shaft 104, enabling the insulating oil to cool itself and continuously cool the stator 102 and coil winding 103. Compared with the prior art that relies solely on external cooling operations such as heat dissipation from the outer casing 101 and the fan, this application adds internal heat dissipation methods to cool the stator 102 and coil winding 103, effectively reducing the internal heat of the stator 102 and improving the operating efficiency, stability, explosion-proof performance, and service life of this application.

[0046] The second implementation method:

[0047] This embodiment, based on the first embodiment, uses a detachable connection for the oil separator 6 instead of the fixed connection in the first embodiment, and adds bolts 7 and heat-conducting putty 8, as detailed below: Please refer to Figure 5 , Figure 6 and Figure 8 The inner end of the oil separator 6 is provided with a strip groove 601, and the inner wall of the strip groove 601 is provided with multiple screw holes 602. The inner end of the stator 102 is provided with multiple screw grooves 107, which are located between an adjacent pair of grooves 106. Bolts 7 are threadedly connected between the screw holes 602 and the screw grooves 107, and the bolts 7 are completely located inside the strip groove 601. 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 stator 102 and fitted to it, and the multiple screw holes 602 are respectively aligned with the multiple screw grooves 107. Then, the bolts 7 are passed through the screw holes 602 and connected to the screw grooves 107 to realize the installation of the oil separator 6 and the stator 102. The strip groove 601 is designed to provide space for the head of the bolt, so that the head of the bolt is not likely to protrude to the inner surface of the oil separator 6 and not to obstruct the placement of the rotor 105.

[0048] Please see Figure 6 and Figure 8 The outer end of the oil separator 6 is provided with two sets of oil collecting ring grooves 603. There are multiple oil collecting ring grooves 603 in each set. The two sets of oil collecting ring grooves 603 are 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 sets of oil collecting ring grooves 603 are located on both sides of the annular groove 108. An oil sensor (not shown in the figure) is fixedly connected inside the oil collecting ring groove 603.

[0049] Because the oil separator 6 and the inner end of the stator 102 are attached, the insulating oil is not likely to overflow to the outside through the gap between them under normal circumstances. Therefore, the oil separator 6, which can be freely disassembled and installed in this application, can still play a role in isolating the insulating oil and allowing it to circulate. At the same time, the oil sensor can effectively monitor the overflow of insulating oil. The oil sensor is connected to an external monitoring terminal. When the oil sensor detects the presence of insulating oil, it indicates that it has seeped into the gap between the oil separator 6 and the stator 102. With the early warning from the external monitoring terminal, this application can be repaired in time before the insulating oil overflows into the inside of the outer casing 101 and affects its operation.

[0050] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this 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) installed inside the housing (101), the rotor (105) being rotatably disposed 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 installed inside the grooves, characterized in that: The stator (102) also has an annular groove (108) in the middle of its interior. The annular groove (108) is located outside the groove (106) and communicates with it. The upper and lower inner walls of the annular groove (108) are provided with oil guide grooves (109). The stator (102) is provided with an oil storage ring (3) on the side near the rotating shaft (104). The outer end of the oil storage ring (3) is fixedly connected to the inner wall of the outer shell (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) both penetrate the interior of the stator (102) and communicate with a pair of oil guide grooves (109) respectively. The oil storage ring (3) has an oil storage cavity (302) inside. A pair of oil guide pipes (4) pass through the oil storage ring (3) until they are connected to the oil storage cavity (302). The oil storage cavity (302), oil guide pipes (4), annular groove (108) and oil guide groove (109) are all filled with insulating oil. An outer annular groove (301) is opened at the end of the oil storage cavity (302) away from the oil guide pipe (4). A transmission component (5) is connected between the oil storage ring (3) and the rotating shaft (104). The transmission component (5) moves through the outer annular groove (301) and extends into the oil storage cavity (302). The transmission component (5) is rotatably connected to the oil storage ring (3). A plurality of evenly distributed semiconductor coolers (2) are fixedly connected to the outer end of the outer shell (101). The cold end of the semiconductor cooler (2) is located inside the outer shell (101) and is fixedly connected to the inside of the oil storage ring (3). The transmission component (5) includes a ring plate (51). A plurality of evenly distributed oil-driving plates (52) are fixedly connected to one end of the ring plate (51) near the oil storage ring (3). The oil-driving plates (52) are rotatably connected to the inside of the oil storage cavity (302), and the periphery of the oil-driving plates (52) is in contact with the inner wall of the oil storage cavity (302). The insulating oil is pushed by rotation. A plurality of evenly distributed gear teeth (53) are fixedly connected to the inner end of the ring plate (51). A gear one (55) is coaxially arranged on the inner side of the ring plate (51). A gear two (54) meshes between the gear one (55) and the gear teeth (53).

2. The explosion-proof three-phase asynchronous motor according to claim 1, characterized in that: One end of the ring piece (51) is rotatably connected to the inside of the outer ring groove (301).

3. The explosion-proof three-phase asynchronous motor according to claim 2, characterized in that: The first gear (55) is fixedly connected to the outer end of the rotating shaft (104), and the inner end of the second gear (54) is rotatably connected to a limiting rod, which is fixedly connected to the inner wall of the outer shell (101).

4. The explosion-proof three-phase asynchronous motor according to claim 1, characterized in that: The inner wall of the oil storage chamber (302) is provided with a lower groove (303), which is located directly above the center line of the oil storage ring (3) and is connected to 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). A strip groove (601) is provided at the inner end of the oil separator (6). Multiple screw holes (602) are provided on the inner wall of the strip groove (601). Multiple screw grooves (107) are provided at the inner end of the stator (102). The screw grooves (107) are located between an adjacent pair of grooves (106). A bolt (7) is threaded between the screw hole (602) and the screw groove (107), and the bolt (7) is completely located inside 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 sets of oil collecting ring grooves (603). Each set of oil collecting ring grooves (603) has multiple sets. The two sets of oil collecting ring grooves (603) are 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 sets of oil collecting ring grooves (603) are located on both sides of the annular groove (108).

7. An explosion-proof three-phase asynchronous motor according to claim 6, characterized in that: An oil sensor is fixedly connected inside 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 thermally conductive mud (8), and the thermally conductive mud (8) fills the gaps between the coil windings (103). The pair of thermally conductive mud (8) are located on both sides of the annular groove (108).

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