Energy-saving self-excitation three-phase asynchronous motor

Abstract

The energy-saving self-excitation three-phase asynchronous motor comprises a stator, a rotor, an end cover and a supporting frame, the stator comprises a stator iron core, a stator winding and a machine base, the rotor comprises a rotor iron core, a rotor winding and an output shaft, the end cover is installed at the front end of the machine base, and the supporting frame and a fan cover are installed at the rear portion of the machine base. The supporting frame and the fan cover are both of a front-back penetrating hollow structure, the end cover and the supporting frame are jointly and rotationally connected with a horizontal output shaft, a ventilation channel is arranged between the end cover and the machine base, and the ventilation channel is communicated with an inner cavity of the machine base. The rear supporting piece is fastened with the fan cover or the limiting frame, the rotating direction of the turbofan can be changed on the basis that the rotating direction of the output shaft is not changed, and therefore the air circulation direction from front to back and the air circulation direction from back to front are formed, the ventilation and heat dissipation effects are guaranteed, and the service life of the turbofan is prolonged. And the fan cover and the ventilation channel can be washed and blown repeatedly, so that the trouble of cleaning is reduced.

Description

Technical Field

[0001] The invention relates to a three-phase asynchronous motor, in particular to an energy-saving self-excited three-phase asynchronous motor. Background Art

[0002] Compared with single-phase asynchronous motors, three-phase asynchronous motors have better operating performance and can save more materials, so they are cheaper, and therefore have been widely used in production. If three-phase asynchronous motors are divided according to the excitation method, they can be divided into self-excited three-phase asynchronous motors and externally excited three-phase asynchronous motors. In order to further save the cost of using self-excited three-phase asynchronous motors for production and manufacturing, it is necessary to improve their energy-saving effect. For self-excited three-phase asynchronous motors, when the heat dissipation effect is not good, the heat cannot be dissipated in time, which will lead to reduced efficiency and increased power consumption. Therefore, the strength of the heat dissipation effect has an important influence on its energy-saving effect. When the existing self-excited three-phase asynchronous motors use air cooling for heat dissipation, the direction of air circulation is usually fixed. When the air inlet is blocked, the air is difficult to circulate, thereby reducing the heat dissipation effect, consuming more electricity, and the energy-saving effect is poor, highlighting the shortcomings of the existing technology. Summary of the invention

[0003] The purpose of the present invention is to provide an energy-saving self-excited three-phase asynchronous motor to solve the technical problem of poor energy-saving effect caused by poor heat dissipation effect.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: An energy-saving self-excited three-phase asynchronous motor comprises a stator, a rotor, an end cover and a support frame, wherein the stator comprises a stator core, a stator winding and a base, and the rotor comprises a rotor core, a rotor winding and an output shaft. The front end of the base is provided with an end cover, and the rear end is provided with a support frame and a wind shield, wherein both the support frame and the wind shield are hollow structures penetrating from front to back, the end cover and the support frame are connected to a horizontal output shaft for rotation together, a ventilation channel is provided between the end cover and the base, and the ventilation channel is connected to an inner cavity of the base, and a main gear is coaxially fixed to the rear of the output shaft , and is coaxially rotatably connected with a turbofan, the turbofan is coaxially fixed with an internal gear ring, the output shaft is coaxially rotatably connected with a support cylinder, a front support member is fixed to the front of the support cylinder, and a rear support member is fixed to the rear, the front support member is connected to a sub gear that rotates at equal angles in a circle compared to the output shaft, each of the sub gears is meshed with the main gear and the internal gear ring at the same time, a limiting frame is fixed to the rear of the output shaft, the limiting frame is detachably fastened to the rear support member by fasteners, and the rear support member is detachably fastened to the wind cover by fasteners.

[0005] On the basis of the above technical solution, the front support member is a No. 1 support arm, and the number of the No. 1 support arms is multiple, and each of the No. 1 support arms is radially fixed to the outer circumferential wall of the front part of the support tube, and the number of the sub-gears is consistent with the number of the No. 1 support arms, and each of the sub-gears is rotatably connected to each No. 1 support arm.

[0006] On the basis of the above technical solution, the rear support member is a No. 2 support arm and a No. 3 support arm, and the number of the No. 2 support arm and the No. 3 support arm are both multiple, and each of the No. 2 support arms and the No. 3 support arms are radially arranged and fixed at equal angles to the outer circumferential wall of the rear part of the support tube, and each of the No. 2 support arms is fastened to the limit frame by bolts, and each of the No. 3 support arms is fastened to the wind hood by bolts.

[0007] On the basis of the above technical solution, the ventilation channel is a ventilation hole, an electric push rod is fixed to the machine base, the electric push rod is externally connected to a power supply and a control system, a guide cylinder is fixed to the front of the machine base in the front-to-back direction, the guide cylinder is slidably connected to a sliding cylinder, an accordion telescopic tube that can be folded and telescoped forward and backward is fixed between the sliding cylinder and the end cover, the outer wall of the accordion telescopic tube is covered with aluminum foil, a plurality of ventilation holes are evenly distributed through the accordion telescopic tube in the front-to-back direction, and the ventilation holes penetrate the aluminum foil.

[0008] On the basis of the above technical solution, the ventilation channel also includes a vent, the sliding cylinder is a radial hollow structure, the sliding cylinder is coaxially rotatably connected with an adjusting cylinder, the adjusting cylinder covers the hollow part of the sliding cylinder, the adjusting cylinder is penetrated by a radial vent, the vent is closed and fixed with a filter, the outer wall of the adjusting cylinder is hinged with a cover plate on the left and right, the cover plate is penetrated and inserted with a No. 1 connecting bolt, the No. 1 connecting bolt can be threadedly connected with the adjusting cylinder so that the cover covers the vent, the adjusting cylinder is threadedly connected with a No. 2 connecting bolt, and the No. 2 connecting bolt can be tightened against the outer circumferential wall of the sliding cylinder.

[0009] Based on the above technical solution, a plurality of cooling fins along the front-to-back direction are fixed on the circumference of the outer wall of the base, a guide member arranged along the front-to-back direction is fixed outside the base, and a brush is connected to the guide member for sliding back and forth. When the brush slides back and forth along the guide member, the cooling fins can be cleaned with the bristles.

[0010] Based on the above technical solution, the guide member is a guide plate, the brush includes a front brush, a plurality of the front brushes are arranged front to back and are fixed to the front support frame at the same time, and the front support frame is fixed to the sliding cylinder.

[0011] On the basis of the above technical solution, the brush also includes a rear brush, and multiple rear brushes are arranged in front and back and fixed to the rear support frame at the same time. A middle support frame is fixed outside the machine base, and a transfer gear is rotatably connected to the middle part of the middle support frame. The front support frame and the rear support frame are respectively fixed with racks, and the front support frame and the rear support frame are centrally symmetrically meshed with the transfer gear through the racks.

[0012] Compared with the prior art, the present invention has the following advantages: the present invention can change the rotation direction of the turbofan without changing the rotation direction of the output shaft by fastening the rear support member to the wind cover or the rear support member to the limit frame, thereby forming two air circulation directions from front to back and from back to front, which not only ensures the ventilation and heat dissipation effects, but also can repeatedly flush and blow the wind cover and the ventilation channel, reducing the trouble of cleaning, while improving the ventilation and heat dissipation effects, ensuring that the temperature inside the base is at a low state, thereby saving electric energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the axonometric structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the coordination of the main gear, the inner gear ring and the auxiliary gear of the present invention.

[0015] Figure 3 It is a schematic structural diagram of the regulating cylinder of the present invention.

[0016] Figure 4 It is a schematic diagram of the cooperation between the rack and the transfer gear of the present invention.

[0017] In the figure: 1, end cover, 2, support frame, 3, machine base, 4, output shaft, 5, wind cover, 8, main gear, 9, turbofan, 10, inner ring gear, 11, support cylinder, 14, sub-gear, 15, limit frame, 16, No. 1 support arm, 17, No. 2 support arm, 18, No. 3 support arm, 19, ventilation hole, 20, electric push rod, 21, guide cylinder, 22, sliding cylinder, 23, organ telescopic tube, 24, ventilation port, 25, adjustment cylinder, 26, filter screen, 27, cover plate, 28, No. 1 connecting bolt, 29, No. 2 connecting bolt, 30, cooling fin, 33, guide plate, 34, front brush, 35, front support frame, 36, rear brush, 361, rear support frame, 37, middle support frame, 38, transfer gear, 39, rack. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-Figure 4As shown, an energy-saving self-excited three-phase asynchronous motor includes a stator, a rotor, an end cover 1 and a support frame 2. The stator includes a stator core, a stator winding and a base 3. The rotor includes a rotor core, a rotor winding and an output shaft 4. The front end of the base 3 is equipped with an end cover 1, and the rear part is equipped with a support frame 2 and a wind cover 5. The support frame 2 and the wind cover 5 are both hollow structures that penetrate the front and back. The end cover 1 and the support frame 2 are connected to the horizontal output shaft 4 by rotation. A ventilation channel is provided between the end cover 1 and the base 3, and the ventilation channel is connected to the inner cavity of the base 3. A main gear 8 is coaxially fixed to the rear of the output shaft 4. It is also coaxially rotatably connected with a turbofan 9, and the turbofan 9 is coaxially fixed with an inner gear ring 10. The output shaft 4 is coaxially rotatably connected with a support tube 11, a front support member is fixed to the front of the support tube 11, and a rear support member is fixed to the rear, the front support member is connected with a sub gear 14 that rotates at an equal angle in a circle relative to the output shaft 4, and each of the sub gears 14 is meshed with the main gear 8 and the inner gear ring 10 at the same time, and a limiting frame 15 is fixed to the rear of the output shaft 4, and the limiting frame 15 is detachably fastened to the rear support member by fasteners, and the rear support member is detachably fastened to the wind cover 5 by fasteners.

[0020] When in use, the limiting frame 15 is fastened to the rear support member by fasteners, and the rear support member is not fastened to the wind cover 5. Under the cooperation of the stator and the rotor, when the output shaft 4 starts to rotate, the rear support member and the support cylinder 11 rotate synchronously with the output shaft 4. At this time, the main gear 8, the auxiliary gear 14 and the inner gear ring 10 can drive the turbofan 9 to rotate synchronously with the output shaft 4, that is, the turbofan 9 rotates forward at this time, and air circulation from the back to the front can be formed through the wind cover 5, the inner cavity of the base 3 and the ventilation passage The air is discharged from the rear of the duct; the limit frame 15 is not fastened to the rear support, and the rear support is fastened to the wind cover 5. Under the cooperation of the stator and the rotor, when the output shaft 4 starts to rotate, the rear support and the support cylinder 11 follow the wind cover 5 and remain stationary. At this time, the main gear 8, the auxiliary gear 14 and the inner gear ring 10 can drive the turbofan 9 to rotate in the opposite direction with the output shaft 4, that is, the turbofan 9 reverses at this time, and the air can flow from front to back through the ventilation channel, the inner cavity of the base 3 and the wind cover 5 and be discharged. The above method can change the rotation direction of the turbofan 9 without changing the rotation direction of the output shaft 4, thereby forming two air flow directions from front to back and from back to front, which not only ensures the ventilation and heat dissipation effect, but also can repeatedly flush and blow the wind cover 5 and the ventilation channel, reducing the trouble of cleaning, while improving the ventilation and heat dissipation effect, ensuring that the temperature in the base 3 is in a low state, thereby saving electric energy.

[0021] The front support member is a No. 1 support arm 16, and there are multiple No. 1 support arms 16. Each No. 1 support arm 16 is radially fixed to the front outer circumferential wall of the support tube 11. The number of the sub-gears 14 is consistent with the number of the No. 1 support arms 16, and each sub-gear 14 is rotatably connected to each No. 1 support arm 16.

[0022] The three secondary gears 14 mesh with the inner gear ring 10 and the main gear 8 at the same time, and the transmission effect is more stable.

[0023] The rear support member is a No. 2 support arm 17 and a No. 3 support arm 18. The number of the No. 2 support arm 17 and the No. 3 support arm 18 are both multiple. Each of the No. 2 support arms 17 and the No. 3 support arms 18 are radially arranged and fixed at equal angles to the outer circumferential wall of the rear portion of the support tube 11. Each of the No. 2 support arms 17 is fastened to the limit frame 15 by bolts, and each of the No. 3 support arms 18 is fastened to the wind hood 5 by bolts.

[0024] When the second support arm 17 is tightly connected to the limit frame 15, the bolts fastening the third support arm 18 to the wind shield 5 should be removed to avoid interfering with the rotation of the second support arm 17 following the support tube 11 relative to the wind shield 5. Similarly, when the third support arm 18 is tightly connected to the wind shield 5, the bolts fastening the second support arm 17 to the limit frame 15 should be removed to avoid interfering with the rotation of the limit frame 15 relative to the wind shield 5.

[0025] The ventilation channel is a ventilation hole 19, and an electric push rod 20 is fixed to the base 3. The electric push rod 20 is externally connected to a power supply and a control system. A guide cylinder 21 is fixed to the front of the base 3 in the front-to-back direction. The guide cylinder 21 is connected to a sliding cylinder 22 for sliding forward and backward. An accordion telescopic tube 23 that can be folded and retracted forward and backward is fixed between the sliding cylinder 22 and the end cover 1. The outer wall of the accordion telescopic tube 23 is covered with aluminum foil. The accordion telescopic tube 23 is evenly distributed with multiple ventilation holes 19 in the front-to-back direction, and the ventilation holes 19 penetrate the aluminum foil.

[0026] The air passage formed by the rotation of the turbofan 9 can freely enter and exit the ventilation hole 19. By controlling the extension and retraction of the electric push rod 20, the sliding cylinder 22 can drive the accordion telescopic tube 23 to extend and retract. When the accordion telescopic tube 23 is extended and retracted, the flow effect of the ventilation hole 19 increases or decreases accordingly, and the speed of the turbofan 9 is constant, so that the wind pressure of the air passing through it can be changed, and then a good effect of cleaning the accordion telescopic tube 23 can be achieved, thereby ensuring its heat dissipation performance.

[0027] The ventilation channel also includes a vent 24. The sliding cylinder 22 is a radial hollow structure. The sliding cylinder 22 is coaxially rotatably connected with an adjusting cylinder 25. The adjusting cylinder 25 covers the hollow part of the sliding cylinder 22. The adjusting cylinder 25 is penetrated with a radial vent 24. The vent 24 is closed and fixed with a filter screen 26. The outer wall of the adjusting cylinder 25 is hinged with a cover plate 27 on the left and right. The cover plate 27 is penetrated and inserted with a No. 1 connecting bolt 28. The No. 1 connecting bolt 28 can be threadedly connected with the adjusting cylinder 25 so that the cover plate 27 covers the vent 24. The adjusting cylinder 25 is threadedly connected with a No. 2 connecting bolt 29. The No. 2 connecting bolt 29 can be tightened on the outer circumferential wall of the sliding cylinder 22.

[0028] Furthermore, by changing the position of the No. 2 connecting bolt 29 pressed against the outer circumferential wall of the sliding cylinder 22, the radial position of the vent 24 relative to the base 3 can be changed. When the bellows telescopic tube 23 is compressed, the vent 19 is closed. At this time, the air circulation through the inner cavity of the base 3 is controlled by controlling whether the cover 27 is opened or not. For example, when there is a lot of dust in the outside air and the dust particles fall from top to bottom, the vent 24 is located at the radial position of the bottom of the base 3, and then the turbofan 9 is reversed, so that the outside air can be sucked in and filtered through the filter 26 and then enter the inner cavity of the base 3 through the vent 24, and then discharged from the wind cover 5, which can greatly reduce the interference of the outside dust and ensure the heat dissipation effect.

[0029] A plurality of heat dissipation fins 30 along the front-to-back direction are fixed to the circumference of the outer wall of the base 3. A guide member arranged along the front-to-back direction is fixed to the outside of the base 3. A brush is connected to the guide member for sliding forward and backward. When the brush slides forward and backward along the guide member, the heat dissipation fins 30 can be cleaned with the bristles.

[0030] Manually cleaning the heat dissipation fins 30 with a brush can reduce the coverage of dust on the heat dissipation fins 30 , thereby restoring the heat dissipation effect of the heat dissipation fins 30 .

[0031] The guide member is a guide plate 33 , and the brush includes a front brush 34 . A plurality of the front brushes 34 are arranged front to back and fixed to a front support frame 35 . The front support frame 35 is fixed to the sliding cylinder 22 .

[0032] Furthermore, by controlling the extension and retraction of the electric push rod 20 , the front support frame 35 can be used to drive the front brush 34 to move forward and backward, so that the heat dissipation fins 30 can be cleaned without manual operation.

[0033] The brush also includes a rear brush 36, and a plurality of the rear brushes 36 are arranged in a front-to-back arrangement and fixed to a rear support frame 361 at the same time. A middle support frame 37 is fixed to the outside of the machine base 3, and a transfer gear 38 is rotatably connected to the middle of the middle support frame 37. Racks 39 are fixed to the front support frame 35 and the rear support frame 361 respectively, and the front support frame 35 and the rear support frame 361 are centrally symmetrically meshed with the transfer gear 38 through the racks 39.

[0034] Furthermore, when the electric push rod 20 is extended or retracted, the meshing of the rack 39 and the transfer gear 38 can enable the front brush 34 and the rear brush 36 to move in opposite directions, that is, closer to and farther away from each other, which can not only clean the heat dissipation fins 30, but also make the air circulation around them more turbulent when they move frequently, so that the dust swept down is discharged from the outer wall of the base 3 and the heat dissipation fins 30.

[0035] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. An energy-saving self-excited three-phase asynchronous motor, comprising a stator, a rotor, an end cover (1) and a support frame (2), wherein the stator comprises a stator core, a stator winding and a base (3), and the rotor comprises a rotor core, a rotor winding and an output shaft (4). The base (3) is provided with an end cover (1) at the front end, and a support frame (2) and a wind shield (5) are provided at the rear end, wherein the support frame (2) and the wind shield (5) are both hollow structures penetrating from front to back, and the end cover (1) and the support frame (2) are rotatably connected to a horizontal output shaft (4), characterized in that: A ventilation passage is provided between the end cover (1) and the base (3), and the ventilation passage is communicated with the inner cavity of the base (3). A main gear (8) is coaxially fixed to the rear of the output shaft (4), and is coaxially rotatably connected to a turbofan (9). The turbofan (9) is coaxially fixed to an inner gear ring (10). The output shaft (4) is coaxially rotatably connected to a support cylinder (11). A front support member is fixed to the front of the support cylinder (11), and a rear support member is fixed to the rear. The front support member is connected to a secondary gear (14) that is rotatably connected to the output shaft (4) at an equal angle to the output shaft (4). Each secondary gear (14) is meshed with the main gear (8) and the inner gear ring (10) at the same time. A limiting frame (15) is fixed to the rear of the output shaft (4), and the limiting frame (15) is detachably fastened to the rear support member via a fastener, and the rear support member is detachably fastened to the wind cover (5) via a fastener.

2. The energy-saving self-excited three-phase asynchronous motor according to claim 1 is characterized in that: The front support member is a No. 1 support arm (16), the number of the No. 1 support arms (16) is plural, each of the No. 1 support arms (16) is radially fixed to the front outer circumferential wall of the support tube (11), the number of the sub-gears (14) is consistent with the number of the No. 1 support arms (16), and each of the sub-gears (14) is rotatably connected to each of the No. 1 support arms (16).

3. The energy-saving self-excited three-phase asynchronous motor according to claim 1 is characterized in that: The rear support member comprises a No. 2 support arm (17) and a No. 3 support arm (18), and the No. 2 support arm (17) and the No. 3 support arm (18) are both provided in plural numbers. Each of the No. 2 support arms (17) and the No. 3 support arms (18) are respectively arranged and fixed at equal angles to the outer circumferential wall of the rear portion of the support tube (11) in a radial direction. Each of the No. 2 support arms (17) is respectively fastened to the limit frame (15) by bolts, and each of the No. 3 support arms (18) is respectively fastened to the wind shield (5) by bolts.

4. The energy-saving self-excited three-phase asynchronous motor according to claim 1 is characterized in that: The ventilation passage is a ventilation hole (19); an electric push rod (20) is fixed to the machine base (3); the electric push rod (20) is externally connected to a power supply and a control system; a guide cylinder (21) is fixed to the front of the machine base (3) in the front-to-rear direction; the guide cylinder (21) is slidably connected to a sliding cylinder (22) in the front-to-rear direction; an accordion telescopic tube (23) capable of folding and retracting forward and backward is fixed between the sliding cylinder (22) and the end cover (1); the outer wall of the accordion telescopic tube (23) is covered with aluminum foil; a plurality of ventilation holes (19) are evenly distributed through the accordion telescopic tube (23) in the front-to-rear direction; the ventilation holes (19) penetrate the aluminum foil.

5. The energy-saving self-excited three-phase asynchronous motor according to claim 4, characterized in that: The ventilation passage also includes a ventilation hole (24). The sliding cylinder (22) is a radial hollow structure. The sliding cylinder (22) is coaxially rotatably connected to an adjusting cylinder (25). The adjusting cylinder (25) covers the hollow portion of the sliding cylinder (22). The adjusting cylinder (25) is penetrated by a radial ventilation hole (24). The ventilation hole (24) is closed and fixed with a filter screen (26). The outer wall of the adjusting cylinder (25) is hinged with a cover plate (27) on the left and right. A No. 1 connecting bolt (28) is inserted through the cover plate (27). The No. 1 connecting bolt (28) can be threadedly connected to the adjusting cylinder (25) so that the cover plate (27) covers the ventilation hole (24). The adjusting cylinder (25) is threadedly connected to a No. 2 connecting bolt (29). The No. 2 connecting bolt (29) can be pressed against the outer circumferential wall of the sliding cylinder (22).

6. The energy-saving self-excited three-phase asynchronous motor according to claim 4, characterized in that: A plurality of heat dissipation fins (30) are fixed to the circumference of the outer wall of the machine base (3) along the front-rear direction, and a guide member arranged along the front-rear direction is fixed to the outside of the machine base (3). A brush is connected to the guide member for forward and backward sliding movement, and the brush can use the bristles to clean the heat dissipation fins (30) when sliding forward and backward along the guide member.

7. The energy-saving self-excited three-phase asynchronous motor according to claim 6, characterized in that: The guide member is a guide plate (33), and the brush comprises a front brush (34). A plurality of the front brushes (34) are arranged in a front-to-back arrangement and are simultaneously fixed to a front support frame (35), and the front support frame (35) is fixed to the sliding cylinder (22).

8. The energy-saving self-excited three-phase asynchronous motor according to claim 7, characterized in that: The brush also includes a rear brush (36), a plurality of the rear brushes (36) are arranged front to back and fixed to a rear support frame (361) at the same time, a middle support frame (37) is fixed outside the machine base (3), a transfer gear (38) is rotatably connected to the middle of the middle support frame (37), a rack (39) is fixed to the front support frame (35) and the rear support frame (361), and the front support frame (35) and the rear support frame (361) are meshed with the transfer gear (38) in a centrally symmetrical manner via the rack (39).

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