A three-phase asynchronous motor with explosion-proof structure

Abstract

The present application relates to a three-phase asynchronous motor with an explosion-proof structure, which belongs to the technical field of motors. The motor comprises a casing, wherein a stator, a rotor and a rotating shaft are arranged inside the casing, a protective casing is fixedly arranged at one end of the casing, an end of the rotating shaft outside the casing passes through the protective casing, the rotating shaft and the protective casing are rotatably connected, a through groove is provided on the side of the casing facing the protective casing, the casing and the protective casing are connected at the through groove, a blowing assembly capable of blowing air into the casing is arranged at the through groove, a power assembly for providing power to the blowing assembly is arranged in the protective casing, a ventilation pipe is fixedly arranged on the outer wall of the casing, one end of the ventilation pipe is connected to the protective casing, an end of the ventilation pipe away from the protective casing is connected to the casing, a condensing pipe is arranged in the ventilation pipe, both ends of the condensing pipe pass through the side walls of the ventilation pipe, the condensing pipe and the ventilation pipe are fixedly connected, a sealing assembly capable of sealing the end of the condensing pipe is arranged at the condensing pipe, and the present application has the effect of improving the heat dissipation efficiency of the explosion-proof motor.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a three-phase asynchronous motor with an explosion-proof structure. Background Art

[0002] A three-phase asynchronous motor is an electric motor that works on the principle of electromagnetic induction. It consists of a stator (stationary part) and a rotor (rotating part). When three-phase alternating current is passed through the stator winding, a rotating magnetic field is generated. The conductor in the rotor cuts the magnetic lines of force under the action of the rotating magnetic field, thereby generating an induced electromotive force and an induced current. These induced currents interact with the rotating magnetic field to generate electromagnetic force, causing the rotor to rotate. Since the speed of the rotor is always slightly lower than the speed of the rotating magnetic field, it is called an asynchronous motor.

[0003] Existing explosion-proof motors generally use external fans to dissipate heat. When the motor is running, the heat generated inside is transferred to the external environment through the motor housing and heat sink. The external fan forces air flow to speed up the air flow around the motor, thereby enhancing the heat dissipation effect. The airflow generated by the fan can take away the heat on the surface of the motor, reduce the motor temperature, and ensure that the motor operates within a safe temperature range.

[0004] Regarding the above-mentioned related technologies, although the external fan can accelerate the flow rate of air around the motor by enhancing air flow, its effectiveness is easily limited. In high temperature, high humidity or closed environment, the heat conduction efficiency and fluidity of the air will decrease, thereby weakening the heat dissipation performance of the fan, resulting in the defect of low heat dissipation efficiency of the explosion-proof motor. Summary of the invention

[0005] In order to improve the heat dissipation efficiency of an explosion-proof motor, the present application provides a three-phase asynchronous motor with an explosion-proof structure.

[0006] The three-phase asynchronous motor with an explosion-proof structure provided in this application adopts the following technical solution:

[0007] A three-phase asynchronous motor with an explosion-proof structure comprises a casing, wherein a stator, a rotor and a rotating shaft are arranged inside the casing, one end of the rotating shaft is rotatably connected to an inner wall of one side of the casing, the other end of the rotating shaft penetrates a side wall of the casing and is rotatably connected to the casing, the rotor is sleeved on the rotating shaft, the rotor is fixedly connected to the rotating shaft, the stator is fixedly connected to the inner wall of the casing, a protective shell is fixedly arranged at one end of the casing, the end of the rotating shaft outside the casing penetrates the protective shell, the rotating shaft and the protective shell are rotatably connected, and a through groove is provided on the side of the casing facing the protective shell The casing and the protective shell are connected at the through groove, and a blowing assembly capable of blowing air into the inside of the casing is arranged at the through groove, and a power assembly for providing power to the blowing assembly is arranged in the protective shell, and a ventilation pipe is fixedly arranged on the outer wall of the casing, one end of the ventilation pipe is connected to the protective shell, and the end of the ventilation pipe away from the protective shell is connected to the casing, a condenser is arranged in the ventilation pipe, and both ends of the condenser penetrate the side walls of the ventilation pipe, the condenser and the ventilation pipe are fixedly connected, and a sealing assembly capable of sealing the end of the condenser is arranged at the condenser.

[0008] By adopting the above technical solution, when using the motor, it is first necessary to connect an external cooling source through the condenser tube, and release the sealing assembly on the end of the cooling tube to allow the coolant to flow into the cooling tube. The coolant releases cold energy to the ventilation tube in the cooling tube, and then the motor is powered on. Driven by the magnetic field, the rotor drives the shaft to rotate. The power assembly supplies energy to the blowing assembly, which blows the air in the protective shell into the inside of the casing, and pulls the cold air in the ventilation tube into the protective shell, and then is pushed to the deep part of the casing by the blowing assembly. The hot air in the casing is discharged into the ventilation tube through the connecting port between the ventilation tube and the casing, and is cooled by the condenser tube. This process not only realizes the circulation of air inside the motor, but also reduces the temperature inside the casing, and the cooling process of the motor is not easily disturbed by external factors, thereby significantly improving the heat dissipation efficiency of the explosion-proof motor.

[0009] Optionally, the blowing assembly includes a first rotating rod and a first fan blade, one end of the first rotating rod is rotatably connected to the inner wall of the protective shell on a side away from the casing, a plurality of first fan blades are provided, and the plurality of first fan blades are evenly distributed along the circumference of the first rotating rod, one end of the first fan blade is fixedly connected to the side wall of the first rotating rod, and the first fan blade is located in the through groove.

[0010] By adopting the above technical solution, the power component drives the first rotating rod to rotate, and the first rotating rod drives the first fan blade to rotate. During the rotation of the first fan blade, the air inside the protective shell is blown into the casing, so that the blowing component realizes the function of blowing air into the casing.

[0011] Optionally, the power assembly includes a first gear and a second gear, the first gear is fixed on the rotating shaft, the first rotating rod passes through the second gear, the second gear and the first rotating rod are fixedly connected, and the first gear and the second gear are meshed.

[0012] By adopting the above technical solution, during the rotation of the shaft, the shaft drives the first gear to rotate, the first gear drives the second gear to rotate, and the second gear drives the first rotating rod to rotate, so that the power component realizes the function of providing power for the blowing component.

[0013] Optionally, a second rotating rod is provided at one end of the ventilation pipe away from the protective shell, one end of the second rotating rod is rotatably connected to an inner wall of one side of the ventilation pipe, and the other end of the second rotating rod extends into the casing, and a plurality of second fan blades are provided at the connecting part of the ventilation pipe and the casing, the second fan blades are fixedly connected to the side wall of the second rotating rod, and the plurality of second fan blades are arranged in sequence along the circumferential side wall of the second rotating rod, and a linkage component for linkage between the second rotating rod and the rotating shaft is provided in the casing.

[0014] By adopting the above technical solution, the second rotating rod is driven to rotate through the linkage component, and the second rotating rod drives the second fan blade to rotate. During the rotation of the second fan blade, the second fan blade draws the air inside the casing into the ventilation duct, thereby accelerating the circulation speed of the air inside the casing.

[0015] Optionally, the linkage assembly includes a first bevel gear and a second bevel gear, the first bevel gear is fixedly connected to the rotating shaft, and the second bevel gear is fixedly connected to one end of the second rotating rod in the housing.

[0016] By adopting the above technical solution, during the rotation of the shaft, the shaft drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, and the second bevel gear drives the second rotating rod to rotate, so that the linkage assembly realizes the linkage between the shaft and the second rotating rod.

[0017] Optionally, the sealing assembly includes a square ring and a sealing plate, the square ring is arranged in the condenser, the square ring and the side wall of the condenser are fixedly connected, the sealing plate is arranged in the condenser and is located on the side of the square ring facing the casing, one side of the sealing plate is hinged to a side wall of the condenser, and a rotating assembly for driving the sealing plate to rotate is arranged at the end of the condenser.

[0018] By adopting the above technical solution, when the condenser is connected to an external cooling source, the rotating component drives the sealing plate to rotate, the sealing plate and the square ring are separated, and the blockage of the condenser is released; when the condenser is disconnected from the external cooling source, the rotating component drives the sealing plate to rotate, the sealing plate and the square tube abut against the side facing the casing, and the condenser is blocked, making it difficult for external objects to enter the condenser, thereby the sealing component achieves the blocking of the condenser.

[0019] Optionally, a sliding groove is provided on a side wall hinged to the sealing plate at the end of the condenser tube, and the rotating component includes a sliding rod and a connecting rod. The sliding rod is arranged in the sliding groove, the sliding rod and the condenser tube are slidingly connected, the connecting rod and the sliding rod are hinged at one end close to the casing, and the connecting rod is hinged to the sealing plate at one end away from the sliding rod. A moving component capable of driving the sliding rod to move is provided at the end of the condenser tube, and a connecting head is provided at the end of the condenser tube, and the connecting head and the condenser tube are plug-fitted.

[0020] By adopting the above technical solution, during the process of inserting the connecting head into the condenser, the moving component drives the sliding rod to move toward the casing, the sliding rod drives the connecting rod to move, and the connecting rod drives the sealing plate to rotate, thereby releasing the blockage of the condenser. During the process of moving the connecting head toward the outside of the condenser, the moving component drives the sliding rod to move away from the casing, the sliding rod drives the connecting rod to move, and the connecting rod drives the sealing plate to rotate, and the sealing plate blocks the condenser, thereby the rotating component realizes the function of driving the sealing plate to rotate.

[0021] Optionally, the moving component includes a push block and a first spring. The push block is fixedly connected to one end of the sliding rod away from the connecting rod. The push block is outside the sliding groove and on the side of the square ring away from the casing. The first spring is fixed between the sliding rod and one side wall of the sliding groove. The extension and contraction direction of the first spring is parallel to the moving direction of the sliding rod.

[0022] By adopting the above technical solution, during the process of the connecting head moving toward the inside of the condenser, the end of the connecting head first contacts the push block and pushes the push block to move toward the casing, the push block drives the slide rod to move, and the first spring is stretched. After the connecting head and the condenser are connected, the sealing plate releases the blockage of the condenser. When the connecting head moves toward the outside of the condenser, the first spring gradually contracts, and the first spring drives the slide rod to move away from the casing, so that the sealing plate blocks the condenser again, thereby the moving component realizes the function of driving the slide rod to move.

[0023] Optionally, one end of the connecting head is square and the other end of the connecting head is cylindrical. A fixed block is fixedly provided on the outer wall of the connecting head, and a card slot is opened on one side of the fixed block. An auxiliary block is fixedly provided on the outer wall of the ventilation pipe, and a movable groove is opened on one side of the auxiliary block. The auxiliary block is slidably connected with a card block at the movable groove, and a pull rod is fixedly provided on the side of the card block facing the bottom wall of the movable groove. The end of the pull rod away from the card block passes through the auxiliary block. The pull rod and the auxiliary block are slidably connected, and the card block and the card slot are snap-fitted.

[0024] By adopting the above technical solution, after the cylindrical end of the connecting head is connected to the external cooling source, the square end of the connecting head moves toward the condenser tube, and the connecting head drives the fixed block to move. When the fixed block moves to the auxiliary block, the clamping block first moves toward the movable groove. After the clamping block and the clamping groove are aligned, the clamping block moves toward the clamping groove, and one end of the clamping block is clamped into the clamping groove, thereby realizing the clamping and fixing of the auxiliary block and the fixed block, and then realizing the fixation of the condenser tube and the connecting head.

[0025] Optionally, a pull plate is fixedly provided on the side of the pull rod away from the clamping block, a second spring is fixedly provided between the pull plate and the auxiliary block, the second spring is sleeved outside the pull rod, and the side of the clamping block away from the pull rod is set as an inclined surface.

[0026] By adopting the above technical solution, in the process of the connecting head driving the auxiliary block to move toward the ventilation pipe, the auxiliary block first contacts the inclined surface of the card block and pushes the card block to move toward the movable groove, the card block drives the pull rod to move, the pull rod drives the pull plate to move, the second spring is stretched, and after the card block and the card slot are aligned, the second spring contracts, driving the pull plate to move toward the fixed block, the pull plate drives the pull rod to move, the pull rod drives the card block to move, and the card block is connected to the card slot, without the need for the staff to manually move the card block, thereby providing convenience for the staff's work.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When using the motor, the condenser is first connected to the cooling source and unblocked to allow the coolant to flow into the cooling tube. After the coolant releases cold energy to the ventilation tube, the motor is powered on, and the power component supplies energy to the blowing component. The blowing component draws cold air into the protective shell and blows the air in the protective shell into the deep of the casing. The hot air is discharged into the ventilation tube and cooled by the condenser. This process realizes the air circulation and cooling inside the motor, thereby improving the heat dissipation efficiency of the explosion-proof motor;

[0029] 2. The second fan blade is driven to rotate by the second rotating rod, and the air inside the casing is pumped into the ventilation pipe, which speeds up the flow of air inside the casing, thereby improving the working efficiency of cooling the motor;

[0030] 3. After the connector and the condenser are disconnected, the sealing assembly seals the end of the condenser to prevent external impurities from entering the condenser. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of a three-phase asynchronous motor with an explosion-proof structure according to an embodiment of the present application;

[0032] Figure 2 is a cross-sectional view showing the internal structure of the casing in the embodiment of the present application;

[0033] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A;

[0034] Figure 4 yes Figure 2 A partial enlarged schematic diagram of part B.

[0035] In the figure, 1, casing; 11, stator; 12, rotor; 13, shaft; 14, through slot; 2, protective shell; 3, blowing assembly; 31, first rotating rod; 32, first blade; 4, power assembly; 41, first gear; 42, second gear; 5, ventilation pipe; 51, second rotating rod; 52, second blade; 53, auxiliary block; 531, moving slot; 54, clamping block; 55, pull rod; 56, pull plate; 57, second spring; 6, condenser; 61, rotating assembly; 611, sliding rod; 6111, avoidance slot; 612, connecting rod; 62, sliding slot; 63, moving assembly; 631, push block; 632, first spring; 7, blocking assembly; 71, square ring; 72, sealing plate; 8, linkage assembly; 81, first bevel gear; 82, second bevel gear; 9, connector; 91, fixing block; 911, clamping slot. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0037] The embodiment of the present application discloses a three-phase asynchronous motor with an explosion-proof structure.

[0038] refer to Figure 1 A three-phase asynchronous motor with an explosion-proof structure includes a casing 1, a ventilation pipe 5 is fixedly arranged on the upper side of the casing 1, the length direction of the ventilation pipe 5 is parallel to the length direction of the motor, a protective shell 2 is fixedly arranged at one end of the casing 1, a rotating shaft 13 is arranged at the protective shell 2, the length direction of the rotating shaft 13 is parallel to the length direction of the casing 1, one end of the rotating shaft 13 penetrates the protective shell 2 and extends into the protective shell 2, and the rotating shaft 13 is rotatably connected to the protective shell 2.

[0039] refer to Figure 1 and Figure 2 A stator 11 is fixedly provided on the inner wall of the motor, one end of the rotating shaft 13 in the protective shell 2 passes through a side wall of the casing 1 and extends to the end of the casing 1 away from the protective shell 2, the end of the rotating shaft 13 in the casing 1 is rotatably connected to the inner wall of the side of the casing 1 away from the protective shell 2, a rotor 12 is fixedly provided on the rotating shaft 13, the rotor 12 is inside the stator 11, a through groove 14 is penetrated through a side wall of the casing 1 close to the protective shell 2, the casing 1 and the protective shell 2 are connected at the through groove 14, and the casing 1 is provided with a blowing component 3 at the through groove 14 for blowing air into the casing 1.

[0040] The blowing assembly 3 includes a first rotating rod 31 and a first fan blade 32. One end of the first rotating rod 31 is rotatably connected to a side wall of the protective shell 2 away from the casing 1. The other end of the first rotating rod 31 extends to the through groove 14. A plurality of first fan blades 32 are provided. The plurality of first fan blades 32 are fixedly connected to the first rotating rod 31 in sequence along the circumferential side wall of the first rotating rod 31. The first fan blade 32 is in the through groove 14. A power assembly 4 for providing power for the rotation of the first rotating rod 31 is provided at the protective shell 2.

[0041] The power assembly 4 includes a first gear 41 and a second gear 42 . The first gear 41 is fixed on the rotating shaft 13 , and the second gear 42 is fixed on the first rotating rod 31 . The first gear 41 and the second gear 42 are meshed.

[0042] After the motor is powered on, the shaft 13 rotates under the action of the magnetic field generated by the rotor 12 and the stator 11, the shaft 13 drives the first gear 41 to rotate, the first gear 41 drives the second gear 42 to rotate, the second gear 42 drives the first rotating rod 31 to rotate, the first rotating rod 31 drives the first fan blade 32 to rotate, and during the rotation of the first fan blade 32, the air in the protective shell 2 is blown into the inside of the casing 1.

[0043] refer to Figure 2 and Figure 3 One end of the ventilation pipe 5 extends to the protective shell 2 and is fixedly connected to the protective shell 2. The ventilation pipe 5 and the protective shell 2 are connected at the connection. The end of the ventilation pipe 5 away from the protective shell 2 is connected to the casing 1. A condenser 6 is arranged in the ventilation pipe 5. The condenser 6 is a U-shaped metal pipe. The two ends of the condenser 6 respectively pass through a side wall of the ventilation pipe 5 away from the casing 1. The condenser 6 and the ventilation pipe 5 are fixedly connected. A connector 9 is inserted at the end of the condenser 6. One end of the connector 9 is square and the other end of the connector 9 is cylindrical.

[0044] The cylindrical part of the connector 9 is used to connect to an external cooling source, and its square port is inserted into the end of the condenser 6 so as to introduce external condensed water into the condenser 6. When the condensed water flows in the condenser 6, it releases cold air to the ventilation duct 5, thereby reducing the temperature inside the ventilation duct 5. Subsequently, the cooling water is discharged from the other end of the condenser 6. At the same time, the blowing assembly 3 not only supplies air to the interior of the casing 1, but also causes the cold air in the ventilation duct 5 to be drawn into the protective shell 2, and then pushed to the interior of the casing 1 by the blowing assembly 3. At the same time, the hot air in the casing 1 is sucked into the ventilation duct 5 through the connection between the ventilation duct 5 and the casing 1. This process reduces the temperature inside the casing 1.

[0045] refer to Figure 2 and Figure 3A sealing component 7 capable of sealing the end of the condenser 6 is provided at the end of the condenser 6. The sealing component 7 includes a square ring 71 and a sealing plate 72. The square ring 71 is horizontally arranged in the condenser 6. The square ring 71 is fixedly connected to the inner wall of the condenser 6. The sealing plate 72 is arranged below the square ring 71. One end of the sealing plate 72 is hinged to a side wall of the condenser 6. A slide groove 62 is provided at the end of the condenser 6 on a side wall connected to the sealing plate 72. The condenser 6 is provided with a rotating component 61 at the slide groove 62 for driving the sealing plate 72 to rotate.

[0046] The rotating component 61 includes a sliding rod 611 and a connecting rod 612. The sliding rod 611 is arranged in the sliding groove 62. The sliding rod 611 and the condenser 6 are slidably connected. The side of the sliding rod 611 facing the inside of the condenser 6 is provided with an avoidance groove 6111 along its own length direction. One end of the connecting rod 612 is in the avoidance groove 6111. The end of the connecting rod 612 in the avoidance groove 6111 is hinged to the sliding rod 611, and the other end of the connecting rod 612 is hinged to the lower surface of the sealing plate 72. A moving component 63 for driving the sliding rod 611 to move is provided at the sliding groove 62.

[0047] The moving assembly 63 includes a first spring 632 and a push block 631. The first spring 632 is fixed between the slide rod 611 and the upper top wall of the slide groove 62. The first spring 632 is in the slide groove 62. The push block 631 and the upper end of the slide rod 611 are fixedly connected to the side facing the inside of the condenser 6.

[0048] During the process of inserting the connecting head 9 into the end of the condenser 6, the end of the connecting head 9 first contacts with the push block 631 and pushes the push block 631 to move toward the casing 1. The push block 631 drives the slide bar 611 to move, and the first spring 632 is stretched. The slide bar 611 drives the connecting rod 612 to move. The connecting rod 612 drives the sealing plate 72 to rotate downward. The sealing plate 72 releases the blockage of the end of the condenser 6, so that the coolant can enter the condenser 6. When the connecting head 9 moves toward the outside of the condenser 6, the first spring 632 contracts, driving the slide bar 611 to move away from the casing 1. The slide bar 611 drives the connecting rod 612 to move. The connecting rod 612 drives the sealing plate 72 to rotate upward. When the sealing plate 72 is in a horizontal state, the sealing plate 72 faces the side of the square ring 71 and abuts against the square ring 71, completing the blocking of the condenser 6, making it difficult for external impurities to enter the condenser 6.

[0049] refer to Figure 2 and Figure 3A fixed block 91 is fixedly provided on one side wall of the connector 9, and a slot 911 is provided on a side wall of the fixed block 91 away from the connector 9. An auxiliary block 53 is provided on one side of the end of the condenser pipe 6. The auxiliary block 53 is fixedly connected to the outer wall of the ventilation pipe 5, and a movable slot 531 is provided on one side of the auxiliary block 53. A clamping block 54 is slidably connected to the movable slot 531 of the auxiliary block 53. The clamping block 54 is clamped and adapted with the clamping slot 911, and a pull rod 55 is fixedly provided on the side of the clamping block 54 facing the inside of the movable slot 531. The length direction of the pull rod 55 is parallel to the length direction of the ventilation pipe 5, and the end of the pull rod 55 away from the block 54 passes through the auxiliary block 53 and is slidably connected to the auxiliary block 53. A pull plate 56 is fixedly arranged at the end of the pull rod 55 away from the block 54, and the pull plate 56 and the pull rod 55 are perpendicular. A second spring 57 is fixedly arranged between the pull plate 56 and the auxiliary block 53, and the second spring 57 is sleeved outside the pull rod 55. The end of the block 54 away from the pull rod 55 is inclined from top to bottom toward the direction away from the pull rod 55.

[0050] During the process of the connecting head 9 moving toward the condenser 6, the connecting head 9 drives the fixed block 91 to move. The fixed block 91 first contacts the inclined surface of the block 54 and pushes the block 54 to move toward the movable groove 531. The block 54 drives the pull rod 55 to move, and the pull rod 55 drives the pull plate 56 to move. The second spring 57 is stretched. After the sealing plate releases the blockage of the condenser 6, the block 54 is aligned with the groove 911, the second spring 57 contracts, and drives the pull plate 56 to move toward the auxiliary block 53. The pull plate 56 drives the pull rod 55 to move, and the pull rod 55 drives the block 54 to move. One end of the block 54 is clamped into the groove 911, thereby realizing the clamping and fixation of the auxiliary block 53 and the fixed block 91, and further realizing the connection between the connecting head 9 and the condenser 6.

[0051] refer to Figure 2 and Figure 4 One end of the ventilation pipe 5 away from the protective shell 2 is rotatably connected to the second rotating rod 51, the second rotating rod 51 is vertically arranged, and the bottom end of the second rotating rod 51 extends from the connecting point to the casing 1. The casing 1 is provided with a plurality of second fan blades 52 at the connecting point with the ventilation pipe 5. The plurality of second fan blades 52 are arranged in sequence along the circumferential side wall of the second rotating rod 51, and one end of the second fan blade 52 close to the second rotating rod 51 is fixedly connected to the second rotating rod 51, and a linkage component 8 for linkage between the second rotating rod 51 and the rotating shaft 13 is provided in the casing 1.

[0052] The linkage assembly 8 includes a first bevel gear 81 and a second bevel gear 82. The first bevel gear 81 is arranged on the rotating shaft 13. The rotating shaft 13 passes through the first bevel gear 81 and is fixedly connected to the first bevel gear 81. The second bevel gear 82 is fixedly connected to one end of the second rotating rod 51 in the casing 1, and the first bevel gear 81 and the second bevel gear 82 are meshed.

[0053] During the rotation of the rotating shaft 13, the rotating shaft 13 drives the first bevel gear 81 to rotate, the first bevel gear 81 drives the second bevel gear 82 to rotate, the second bevel gear 82 drives the second rotating rod 51 to rotate, the second rotating rod 51 drives the second fan blade 52 to rotate, and during the rotation of the second fan blade 52, the second fan blade 52 draws the air in the casing 1 into the ventilation pipe 5, thereby speeding up the air flow inside the casing 1.

[0054] The implementation principle of a three-phase asynchronous motor with an explosion-proof structure in an embodiment of the present application is as follows: the cylindrical part of the connector 9 is connected to an external cooling source, and the square port is inserted into the end of the condenser 6 to guide the condensed water into the condenser 6. The condensed water releases cold air when flowing in the condenser 6, reduces the temperature in the ventilation pipe 5, and is then discharged from the other end of the condenser 6. After the motor is powered on, under the action of the magnetic field, the shaft 13 starts to rotate, and drives the second gear 42 to rotate through the first gear 41, and the second gear 42 and the first rotating rod 31 rotate. The first rotating rod 31 drives the first fan blade 32 to rotate. The rotation of the first fan blade 32 blows the air in the protective shell 2 to the inside of the casing 1, and at the same time causes the cold air in the ventilation pipe 5 to be drawn into the protective shell 2, and pushed to the inside of the casing 1 by the first fan blade 32, so as to realize the replacement of the hot air in the casing 1, thereby reducing the temperature inside the motor.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A three-phase asynchronous motor with an explosion-proof structure, comprising a casing (1), wherein a stator (11), a rotor (12) and a rotating shaft (13) are arranged inside the casing (1), one end of the rotating shaft (13) is rotatably connected to an inner wall of one side of the casing (1), the other end of the rotating shaft (13) penetrates a side wall of the casing (1) and is rotatably connected to the casing (1), the rotor (12) is sleeved on the rotating shaft (13), the rotor (12) is fixedly connected to the rotating shaft (13), and the stator (11) is fixedly connected to the inner wall of the casing (1), characterized in that: A protective shell (2) is fixedly provided at one end of the casing (1); an end of a rotating shaft (13) outside the casing (1) penetrates the protective shell (2); the rotating shaft (13) and the protective shell (2) are rotatably connected; a through slot (14) is provided on a side of the casing (1) facing the protective shell (2); the casing (1) and the protective shell (2) are connected at the through slot (14); a blowing assembly (3) capable of blowing air into the casing (1) is provided at the through slot (14); a power assembly (4) for providing power to the blowing assembly (3) is provided in the protective shell (2); a ventilation pipe (5) is fixedly provided on the outer wall of the casing (1); one end of the ventilation pipe (5) is connected to the protective shell (2); the ventilation pipe (5) 5) one end away from the protective shell (2) is connected to the casing (1), a condenser (6) is arranged in the ventilation pipe (5), both ends of the condenser (6) penetrate the side wall of the ventilation pipe (5), the condenser (6) and the ventilation pipe (5) are fixedly connected, and a blocking component (7) capable of blocking the end of the condenser (6) is arranged at the condenser (6); the blocking component (7) comprises a square ring (71) and a sealing plate (72), the square ring (71) is arranged in the condenser (6), the square ring (71) and the side wall of the condenser (6) are fixedly connected, the sealing plate (72) is arranged in the condenser (6), and is located on the side of the square ring (71) facing the casing (1), and the sealing plate (72) One side of the condenser (6) is hinged to a side wall of the condenser (6), and a rotating assembly (61) for driving the sealing plate (72) to rotate is provided at the end of the condenser (6); a sliding groove (62) is provided at the end of the condenser (6) on the side wall hinged to the sealing plate (72), and the rotating assembly (61) includes a sliding rod (611) and a connecting rod (612), the sliding rod (611) is arranged in the sliding groove (62), the sliding rod (611) and the condenser (6) are slidably connected, the connecting rod (612) and the sliding rod (611) are hinged at one end close to the casing (1), and the connecting rod (612) is hinged at one end away from the sliding rod (611) and the sealing plate (72), and the end of the condenser (6) is provided with a rotating assembly (61) capable of driving the sealing plate (72) to rotate. A moving component (63) drives the slide bar (611) to move, and a connector (9) is provided at the end of the condenser (6), and the connector (9) and the condenser (6) are plug-fitted; the moving component (63) includes a push block (631) and a first spring (632), the push block (631) and an end of the slide bar (611) away from the connecting rod (612) are fixedly connected, the push block (631) is outside the slide groove (62), and is on the side of the square ring (71) away from the casing (1), the first spring (632) is fixed between the slide bar (611) and a side wall of the slide groove (62), and the extension direction of the first spring (632) is parallel to the moving direction of the slide bar (611).

2. The three-phase asynchronous motor with an explosion-proof structure according to claim 1, characterized in that: The blowing assembly (3) comprises a first rotating rod (31) and a first fan blade (32); one end of the first rotating rod (31) is rotatably connected to an inner wall of a side of the protective shell (2) away from the housing (1); a plurality of first fan blades (32) are provided, and the plurality of first fan blades (32) are evenly distributed along the circumference of the first rotating rod (31); one end of the first fan blade (32) is fixedly connected to a side wall of the first rotating rod (31); and the first fan blade (32) is located at the through groove (14).

3. The three-phase asynchronous motor with explosion-proof structure according to claim 2, characterized in that: The power assembly (4) comprises a first gear (41) and a second gear (42); the first gear (41) is fixedly mounted on the rotating shaft (13); the first rotating rod (31) passes through the second gear (42); the second gear (42) and the first rotating rod (31) are fixedly connected; and the first gear (41) and the second gear (42) are meshed.

4. The three-phase asynchronous motor with an explosion-proof structure according to claim 1, characterized in that: A second rotating rod (51) is provided at one end of the ventilation pipe (5) away from the protective shell (2); one end of the second rotating rod (51) is rotatably connected to an inner wall of one side of the ventilation pipe (5); the other end of the second rotating rod (51) extends into the casing (1); a plurality of second fan blades (52) are provided at the connection between the ventilation pipe (5) and the casing (1); the second fan blades (52) are fixedly connected to the side wall of the second rotating rod (51); the plurality of second fan blades (52) are arranged in sequence along the circumferential side wall of the second rotating rod (51); and a linkage assembly (8) for linkage between the second rotating rod (51) and the rotating shaft (13) is provided in the casing (1).

5. The three-phase asynchronous motor with explosion-proof structure according to claim 4, characterized in that: The linkage assembly (8) comprises a first bevel gear (81) and a second bevel gear (82); the first bevel gear (81) is fixedly connected to the rotating shaft (13); and the second bevel gear (82) is fixedly connected to one end of the second rotating rod (51) located inside the housing (1).

6. The three-phase asynchronous motor with explosion-proof structure according to claim 1, characterized in that: One end of the connecting head (9) is square, and the other end of the connecting head (9) is cylindrical. A fixed block (91) is fixedly provided on the outer wall of the connecting head (9), and a clamping groove (911) is provided on one side of the fixed block (91). An auxiliary block (53) is fixedly provided on the outer wall of the ventilation pipe (5), and a movable groove (531) is provided on one side of the auxiliary block (53). The auxiliary block (53) is slidably connected with a clamping block (54) at the movable groove (531). A pull rod (55) is fixedly provided on the side of the clamping block (54) facing the inner bottom wall of the movable groove (531). The end of the pull rod (55) away from the clamping block (54) passes through the auxiliary block (53). The pull rod (55) and the auxiliary block (53) are slidably connected, and the clamping block (54) and the clamping groove (911) are clamped and adapted.

7. The three-phase asynchronous motor with explosion-proof structure according to claim 6, characterized in that: A pull plate (56) is fixedly provided on the side of the pull rod (55) away from the clamping block (54), a second spring (57) is fixedly provided between the pull plate (56) and the auxiliary block (53), the second spring (57) is sleeved outside the pull rod (55), and the side of the clamping block (54) away from the pull rod (55) is set as an inclined surface.

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