Backward-inclined centrifugal cooling outer fan structure of high-voltage asynchronous motor

Abstract

The utility model discloses a backward-inclined centrifugal cooling outer fan structure of a high-voltage asynchronous motor, and relates to the technical field of high-voltage asynchronous motors. The motor comprises an asynchronous motor shell, a fan shell and a centrifugal fan, the centrifugal fan is installed in the fan shell, the fan shell is detachably installed at the end of the asynchronous motor shell, a driving shaft is rotationally installed at one end of the asynchronous motor shell, a ventilation hole is formed in one end of the fan shell, and a connecting assembly is arranged in the fan shell. According to the utility model, the hexagonal convex shaft at the end part of the connecting shaft is connected with the hexagonal groove at the end part of the driving shaft, and the fan shell is fixed at the rear end part of the asynchronous motor shell, so that when the driving shaft rotates, the driving shaft enables the centrifugal fan to rotate through the hexagonal groove, the hexagonal convex shaft and the connecting shaft, thereby conveniently realizing the installation of the centrifugal fan; and therefore, the convenience of mounting the centrifugal fan is effectively improved, and meanwhile, subsequent operators can conveniently maintain or replace the centrifugal fan.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage asynchronous motors, in particular to a backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor. Background Art

[0002] Asynchronous motor, also known as induction motor, is an AC motor that converts electromechanical energy into mechanical energy by the interaction between the rotating magnetic field of the air gap and the induced current of the rotor winding to generate electromagnetic torque;

[0003] At present, most high-voltage asynchronous motors are equipped with centrifugal fans to cool down and dissipate heat from the rotor and stator in the motor. However, the prior art is relatively cumbersome in assembling the centrifugal fan, which makes the installation of the centrifugal fan inconvenient and the maintenance of the centrifugal fan inconvenient. In view of the above problems, the inventor proposes a backward-inclined centrifugal cooling external fan structure for a high-voltage asynchronous motor to solve the above problems. Utility Model Content

[0004] In order to solve the problem that the centrifugal fan of a high-voltage asynchronous motor is inconvenient to install, the utility model aims to provide a backward-inclined centrifugal cooling external fan structure for a high-voltage asynchronous motor.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor, comprising an asynchronous motor housing, a fan housing and a centrifugal fan, wherein the centrifugal fan is installed in the fan housing, and the fan housing is detachably installed at the end of the asynchronous motor housing, a drive shaft is rotatably installed at one end of the asynchronous motor housing, a ventilation hole is opened at one end of the fan housing, a connecting component is arranged in the fan housing, and a disassembly mechanism is arranged between the fan housing and the asynchronous motor housing;

[0006] The connecting assembly includes a connecting shaft, which passes through the centrifugal fan and is fixedly connected to the axis of the centrifugal fan. A hexagonal cam is fixedly installed on one end of the connecting shaft. A hexagonal groove is provided on one end of the driving shaft. The hexagonal cam and the inner wall of the hexagonal groove are movably connected. A sleeve is provided at the axis of the ventilation hole. An end of the connecting shaft away from the hexagonal cam is movably connected to the inner wall of the sleeve.

[0007] Preferably, two bases are fixedly connected to the outer wall of the asynchronous motor housing, and two mounting holes are provided on the two bases.

[0008] Preferably, evenly distributed air inlet slots are provided at one end of the asynchronous motor housing close to the driving shaft.

[0009] Preferably, a dustproof net is fixedly mounted on the inner wall of the ventilation hole.

[0010] Preferably, a circular guide rail is fixedly installed on the inner wall of the ventilation hole, and two arc-shaped sliders are slidably installed on the circular guide rail. A connecting rod is fixedly installed on one side of the two arc-shaped sliders, and one end of the two connecting rods is fixedly connected to the outer wall of the sleeve.

[0011] Preferably, the disassembly and assembly mechanism includes two limit rods, two insertion holes are provided at one end of the fan housing, the limit rod passes through the insertion holes and is in movably contact with the inner wall of the insertion holes, the outer wall of the asynchronous motor housing is provided with two limit holes, one end of the limit rod is movably inserted into the inner wall of the limit hole, the outer wall of the fan housing is fixedly mounted with four evenly distributed side panels, a rotating shaft is rotatably installed between two adjacent side panels, the outer wall of the fan housing is provided with two push plates, the rotating shaft passes through the push plates and is fixedly connected to the push plates, one end of the two push plates is fixedly mounted with a U-shaped seat, and the end of the limit rod away from the limit hole is hinged to the U-shaped seat.

[0012] Preferably, a pressing block is fixedly mounted on one end of the two pushing plates away from the U-shaped seat.

[0013] Preferably, two spring rods are provided between the two push plates and the fan housing, two first hinge seats are fixedly installed on the outer wall of the fan housing, and a second hinge seat is fixedly installed on one end of the two push plates away from the U-shaped seat, one end of the spring rod is hinged to the first hinge seat, and the other end of the spring rod is hinged to the second hinge seat.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, the hexagonal cam at the end of the connecting shaft is connected to the hexagonal groove at the end of the driving shaft, and the fan housing is fixed to the rear end of the asynchronous motor housing. When the driving shaft rotates, the driving shaft rotates the centrifugal fan through the hexagonal groove, the hexagonal cam and the connecting shaft, thereby facilitating the installation of the centrifugal fan, thereby effectively improving the convenience of installing the centrifugal fan, and facilitating subsequent maintenance or replacement of the centrifugal fan by operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The utility model is a schematic diagram of the overall structure of a backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor.

[0018] Figure 2 It is a schematic diagram of the separation of the fan housing and the asynchronous motor housing of the utility model.

[0019] Figure 3 This is another schematic diagram of the separation of the fan housing and the asynchronous motor housing of the utility model.

[0020] Figure 4 For this utility model Figure 3 A magnified schematic diagram of part A in FIG.

[0021] Figure 5 It is a schematic diagram of the separation of the dustproof net and the ventilation hole of the utility model.

[0022] Figure 6 It is a schematic diagram of the cutaway structure of the fan casing of the utility model.

[0023] Figure 7 For this utility model Figure 6 An enlarged schematic diagram of part B in FIG.

[0024] Figure 8 For this utility model Figure 6 Enlarged schematic diagram of part C in FIG.

[0025] In the figure: 1. asynchronous motor housing; 11. base; 12. mounting hole; 13. fan housing; 14. centrifugal fan; 15. drive shaft; 16. air inlet slot; 17. ventilation hole; 18. dust screen; 2. connecting assembly; 21. connecting shaft; 22. hexagonal convex shaft; 23. hexagonal groove; 24. sleeve; 25. circular guide rail; 26. arc slider; 27. connecting rod; 3. disassembly and assembly mechanism; 31. limit rod; 32. insertion hole; 33. limit hole; 34. side plate; 35. rotating shaft; 36. push plate; 37. U-shaped seat; 38. pressing block; 39. spring rod; 4. first hinge seat; 41. second hinge seat. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example: Figure 1-8As shown, the utility model provides a backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor, comprising an asynchronous motor housing 1, a fan housing 13 and a centrifugal fan 14, wherein the centrifugal fan 14 is installed in the fan housing 13, and the fan housing 13 is detachably installed at the end of the asynchronous motor housing 1, a drive shaft 15 is rotatably installed at one end of the asynchronous motor housing 1, a ventilation hole 17 is opened at one end of the fan housing 13, a connecting component 2 is arranged in the fan housing 13, and a disassembly mechanism 3 is arranged between the fan housing 13 and the asynchronous motor housing 1;

[0028] The connecting assembly 2 includes a connecting shaft 21, which passes through the centrifugal fan 14 and is fixedly connected to the axial center position of the centrifugal fan 14. A hexagonal cam 22 is fixedly installed on one end of the connecting shaft 21. A hexagonal groove 23 is provided at one end of the driving shaft 15. The hexagonal cam 22 and the inner wall of the hexagonal groove 23 are movably connected. A sleeve 24 is provided at the axial center position of the ventilation hole 17. The end of the connecting shaft 21 away from the hexagonal cam 22 is movably connected to the inner wall of the sleeve 24.

[0029] By adopting the above technical solution, by setting the connecting component 2, the connecting component 2 can conveniently connect the centrifugal fan 14 and the driving shaft 15 together. When the driving shaft 15 rotates, the driving shaft 15 rotates the centrifugal fan 14 through the connecting component 2. By setting the disassembly and assembly mechanism 3, the disassembly and assembly mechanism 3 fixes the fan housing 13 to the rear end of the asynchronous motor housing 1, thereby facilitating the installation of the centrifugal fan 14 and facilitating the maintenance or replacement of the centrifugal fan 14.

[0030] Two bases 11 are fixedly connected to the outer wall of the asynchronous motor housing 1 , and two mounting holes 12 are formed on the two bases 11 .

[0031] By adopting the above technical solution and providing the base 11 and the mounting hole 12 , it is convenient to fix the asynchronous motor housing 1 on the external device.

[0032] One end of the asynchronous motor housing 1 close to the driving shaft 15 is provided with evenly distributed air inlet slots 16 .

[0033] By adopting the above technical solution and providing the air inlet slot 16 , the airflow generated by the rotation of the centrifugal fan 14 enters the interior of the asynchronous motor housing 1 through the air inlet slot 16 , and cools and dissipates the heat of the rotor and stator in the asynchronous motor housing 1 .

[0034] A dustproof net 18 is fixedly mounted on the inner wall of the ventilation hole 17 .

[0035] By adopting the above technical solution and providing the dustproof net 18 , it is prevented that external dust enters the fan housing 13 and the asynchronous motor housing 1 through the ventilation holes 17 .

[0036] A circular guide rail 25 is fixedly installed on the inner wall of the ventilation hole 17 , and two arc-shaped sliders 26 are slidably installed on the circular guide rail 25 . A connecting rod 27 is fixedly installed on one side of the two arc-shaped sliders 26 , and one end of the two connecting rods 27 is fixedly connected to the outer wall of the sleeve 24 .

[0037] By adopting the above technical solution, by setting a circular guide rail 25, an arc-shaped slider 26 and a connecting rod 27, when the connecting shaft 21 rotates, the connecting shaft 21 makes the arc-shaped slider 26 slide on the circular guide rail 25 through the sleeve 24 and the connecting rod 27, and the arc-shaped slider 26 supports the connecting shaft 21 through the connecting rod 27 and the sleeve 24, thereby improving the stability of the centrifugal fan 14.

[0038] The disassembly and assembly mechanism 3 includes two limiting rods 31, and one end of the fan housing 13 is provided with two insertion holes 32. The limiting rod 31 passes through the insertion holes 32 and is in active contact with the inner wall of the insertion holes 32. The outer wall of the asynchronous motor housing 1 is provided with two limiting holes 33. One end of the limiting rod 31 is movably plugged into the inner wall of the limiting hole 33. The outer wall of the fan housing 13 is fixedly installed with four evenly distributed side panels 34, and a rotating shaft 35 is rotatably installed between two adjacent side panels 34. The outer wall of the fan housing 13 is provided with two push plates 36. The rotating shaft 35 passes through the push plates 36 and is fixedly connected to the push plates 36. One end of the two push plates 36 is fixedly installed with a U-shaped seat 37, and the end of the limiting rod 31 away from the limiting hole 33 is hinged to the U-shaped seat 37.

[0039] By adopting the above technical solution, by setting the limiting rod 31, the insertion hole 32 and the limiting hole 33, the limiting rod 31 moves in the insertion hole 32, and at the same time, the insertion hole 32 limits the limiting rod 31 to maintain the horizontal movement. When the limiting rod 31 is horizontally inserted into the limiting hole 33, the limiting rod 31 fixes the fan housing 13 to the rear end of the asynchronous motor housing 1 through the limiting hole 33, and pushes the end of the pushing plate 36. The pushing plate 36 rotates with the axis of the rotating shaft 35 as the center of the circle. The pushing plate 36 moves the limiting rod 31 horizontally through the U-shaped seat 37, thereby realizing the connection or separation of the limiting rod 31 and the limiting hole 33.

[0040] A pressing block 38 is fixedly mounted on one end of the two push plates 36 away from the U-shaped seat 37 .

[0041] By adopting the above technical solution and providing the pressing block 38 , it is convenient for the operator to press the push plate 36 to rotate.

[0042] Two spring rods 39 are provided between the two push plates 36 and the fan housing 13. Two first hinge seats 4 are fixedly installed on the outer wall of the fan housing 13. A second hinge seat 41 is fixedly installed on one end of the two push plates 36 away from the U-shaped seat 37. One end of the spring rod 39 is hinged to the first hinge seat 4, and the other end of the spring rod 39 is hinged to the second hinge seat 41.

[0043] By adopting the above technical solution, by setting the spring rod 39, the first hinge seat 4 and the second hinge seat 41, when the operator presses the end of the push plate 36, the push plate 36 rotates with the axis of the rotating shaft 35 as the center, and the push plate 36 contracts the spring rod 39 through the second hinge seat 41. When the pressure on the push plate 36 stops, the spring rod 39 extends and resets the push plate 36 through the second hinge seat 41.

[0044] Working principle: When the centrifugal fan 14 needs to be fixed to the rear end of the asynchronous motor housing 1, the staff first presses the two pressing blocks 38 towards each other at the same time, and the two pressing blocks 38 make the two push plates 36 rotate with the axis of the corresponding rotating shaft 35 as the center of the circle, and the two push plates 36 make the two spring rods 39 contract, and the two push plates 36 make the two limit rods 31 move away from each other and move to the corresponding insertion holes 32 through the two U-shaped seats 37;

[0045] Subsequently, the end of the connecting shaft 21 is inserted into the sleeve 24, and then the fan housing 13 is sleeved on the rear end of the asynchronous motor housing 1, and the hexagonal convex shaft 22 is horizontally inserted into the hexagonal groove 23, the two limiting rods 31 are horizontally corresponding to the two limiting holes 33, and then the two pressing blocks 38 are released. At this time, the two spring rods 39 are extended and the two push plates 36 are reset through the corresponding second hinge seats 41. When the two push plates 36 are reset, the two limiting rods 31 are brought close to each other and inserted into the corresponding limiting holes 33. When the fan housing 13 is fixed to the rear end of the asynchronous motor housing 1, the limiting plug rod 31 passes through the limiting hole 33, and the driving shaft 15 is connected to the connecting shaft 21 at the axial position of the centrifugal fan 14. When the driving shaft 15 rotates, the driving shaft 15 rotates the centrifugal fan 14 through the hexagonal groove 23, the hexagonal convex shaft 22 and the connecting shaft 21, thereby facilitating the installation of the centrifugal fan 14, thereby effectively improving the convenience of installing the centrifugal fan 14, and facilitating subsequent operators to maintain or replace the centrifugal fan 14.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A backward-inclined centrifugal cooling external fan structure for a high-voltage asynchronous motor, comprising an asynchronous motor housing (1), a fan housing (13) and a centrifugal fan (14), wherein the centrifugal fan (14) is installed in the fan housing (13), and the fan housing (13) is detachably installed at the end of the asynchronous motor housing (1), characterized in that: A drive shaft (15) is rotatably mounted on one end of the asynchronous motor housing (1), a ventilation hole (17) is provided on one end of the fan housing (13), a connecting assembly (2) is provided in the fan housing (13), and a disassembly mechanism (3) is provided between the fan housing (13) and the asynchronous motor housing (1); The connecting assembly (2) comprises a connecting shaft (21), the connecting shaft (21) passes through the centrifugal fan (14) and is fixedly connected to the centrifugal fan (14) at the axial center position, a hexagonal convex shaft (22) is fixedly mounted on one end of the connecting shaft (21), a hexagonal groove (23) is provided on one end of the driving shaft (15), the hexagonal convex shaft (22) and the inner wall of the hexagonal groove (23) are movably plugged, a sleeve (24) is provided at the axial center position of the ventilation hole (17), and one end of the connecting shaft (21) away from the hexagonal convex shaft (22) is movably plugged into the inner wall of the sleeve (24).

2. The backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor according to claim 1, characterized in that: Two bases (11) are fixedly connected to the outer wall of the asynchronous motor housing (1), and two mounting holes (12) are provided on the two bases (11).

3. The backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor according to claim 1, characterized in that: The asynchronous motor housing (1) is provided with evenly distributed air inlet slots (16) at one end close to the drive shaft (15).

4. The backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor according to claim 1, characterized in that: A dustproof net (18) is fixedly mounted on the inner wall of the ventilation hole (17).

5. The backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor according to claim 1, characterized in that: A circular guide rail (25) is fixedly mounted on the inner wall of the ventilation hole (17), and two arc-shaped sliders (26) are slidably mounted on the circular guide rail (25). A connecting rod (27) is fixedly mounted on one side of the two arc-shaped sliders (26), and one end of the two connecting rods (27) is fixedly connected to the outer wall of the sleeve (24).

6. The backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor according to claim 1, characterized in that: The disassembly and assembly mechanism (3) comprises two limiting insertion rods (31), one end of the fan housing (13) is provided with two insertion holes (32), the limiting insertion rods (31) penetrate the insertion holes (32) and are in active contact with the inner walls of the insertion holes (32), the outer wall of the asynchronous motor housing (1) is provided with two limiting holes (33), one end of the limiting insertion rods (31) is in active contact with the inner walls of the limiting holes (33), and the outer wall of the fan housing (13) is fixedly provided with Four side plates (34) are evenly distributed, and a rotating shaft (35) is rotatably installed between two adjacent side plates (34). The outer wall of the fan housing (13) is provided with two push plates (36). The rotating shaft (35) passes through the push plates (36) and is fixedly connected to the push plates (36). One end of the two push plates (36) is fixedly installed with a U-shaped seat (37), and one end of the limiting rod (31) away from the limiting hole (33) is hinged to the U-shaped seat (37).

7. A backward-inclined centrifugal cooling external fan structure for a high-voltage asynchronous motor as claimed in claim 6, characterized in that: A pressing block (38) is fixedly mounted on one end of the two push plates (36) away from the U-shaped seat (37).

8. The backward-inclined centrifugal cooling external fan structure of a high-voltage asynchronous motor according to claim 6, characterized in that: Two spring rods (39) are provided between the two push plates (36) and the fan housing (13); two first hinge seats (4) are fixedly mounted on the outer wall of the fan housing (13); a second hinge seat (41) is fixedly mounted on one end of the two push plates (36) away from the U-shaped seat (37); one end of the spring rod (39) is hinged to the first hinge seat (4), and the other end of the spring rod (39) is hinged to the second hinge seat (41).

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