CN211908571U

CN211908571U - Frequency-conversion speed-regulation three-phase asynchronous motor

Info

Publication number: CN211908571U
Application number: CN202020319631.0U
Authority: CN
Inventors: 符曰新; 陈利军; 宋世敏
Original assignee: Qiaoli Electric Machinery Co ltd
Current assignee: Qiaoli Electric Machinery Co ltd
Priority date: 2020-03-14
Filing date: 2020-03-14
Publication date: 2020-11-10
Anticipated expiration: 2030-03-14

Abstract

The utility model discloses a Variable Frequency Speed Governing (VFSG) three-phase asynchronous motor relates to motor technical field, and its technical scheme main points are: the fan-driven fan assembly comprises a machine shell, wherein a rotating shaft and a fan are arranged in the machine shell, a driven shaft is arranged in the machine shell in a rotating mode, the axis of the driven shaft coincides with that of the rotating shaft, the fan is fixed on the driven shaft, an inner gear ring is arranged at the end portion, facing the driven shaft, of the rotating shaft, a driven gear is fixed at the end portion, facing the rotating shaft, of the driven shaft, the driven gear is located in the inner gear ring, a transmission gear is arranged between the driven gear and the. The motor can improve the rotating speed of the fan, has a better heat dissipation effect, and can be conveniently disassembled and assembled.

Description

Frequency-conversion speed-regulation three-phase asynchronous motor

Technical Field

The utility model relates to the technical field of electric machines, in particular to Variable Frequency Speed Governing (VFSG) three-phase asynchronous machine.

Background

The variable frequency speed regulating motor is a general name of a motor driven by a frequency converter, and has the advantages of being capable of adapting to frequent speed change under different working conditions and saving energy to a certain extent.

The prior patent of the invention with the publication number of CN106685147B discloses a variable frequency speed-regulating three-phase asynchronous motor, which comprises a base, a fixed ring for fixing a stator core is arranged at the inner side of the rear end of the base, a temperature sensor is arranged on the fixed ring, a front end cover and a rear end cover are arranged at the front side and the rear side of the base, a rotor is fixed in the base, bearings are arranged at the two ends of a rotor shaft, bearing supports are arranged on the front end cover and the rear end cover, vent holes are arranged on the front end cover and the rear end cover, a fan and a fan cover are arranged at the rear side of the rear end cover, and a.

The above prior art solutions have the following drawbacks: if the fan is coaxially fixed on the rotating shaft of the motor, the rotating speed of the fan is equal to that of the rotating shaft, and due to structural limitation of the fan, the heat dissipation of the motor is easy to be insufficient under the condition that the fan corresponds to the rotating speed of the rotating shaft.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a Variable Frequency Speed Governing (VFSG) three-phase asynchronous machine can improve the rotational speed of fan, has better radiating effect.

The above technical purpose of the present invention can be achieved by the following technical solutions: a rotating shaft and a fan are arranged in the shell, a driven shaft is arranged in the shell in a rotating mode, the axis of the driven shaft coincides with that of the rotating shaft, the fan is fixed on the driven shaft, an inner gear ring is arranged at the end portion, facing the driven shaft, of the rotating shaft, a driven gear is fixed at the end portion, facing the rotating shaft, of the driven shaft, the driven gear is located in the inner gear ring, a transmission gear is arranged between the driven gear and the inner gear ring, the transmission gear is connected with the shell in a rotating mode, and the transmission gear is meshed with the inner gear ring and the driven.

Through the technical scheme, the rotating shaft rotates when the motor works, the inner gear ring rotates, the inner gear ring drives the driven gear to rotate through the transmission gear through the meshing effect of the gear teeth, and then the driven shaft and the fan are driven to rotate. The inner gear ring, the transmission gear and the driven gear form an accelerating structure, so that the rotating speed of the fan is higher than that of the rotating shaft, and the fan has a better heat dissipation effect compared with the prior art.

Preferably, the casing includes the shell that is fixed with the stator, locates the fan housing of shell tip, leave the clearance that supplies the circulation of air between fan housing, the shell, fan housing pass through the bolt and fix, establish the rotation and connect through setting up bearing one between driven shaft, fan housing.

Through the technical scheme, the shell and the fan cover can be conveniently disassembled and assembled, and further the driven shaft and the fan can be disassembled and assembled; when the fan rotates, the air blown out by the fan blows over the surface of the shell, and the effect of radiating the shell is achieved.

Preferably, the casing further comprises a support frame positioned between the casing and the fan housing, the support frame and the fan housing are fixed through bolts, and the transmission gear is rotatably arranged on the support frame.

Through above-mentioned technical scheme, through setting up the support frame, the support frame can carry out the dismouting with the fan housing, and then can carry out the dismouting to drive gear.

Preferably, the support frame includes fixed part fixed with the fan housing, supplies drive gear to rotate the supporting part of being connected, supporting part and fixed part establish fixedly through the connecting rod that sets up between the two, the connecting rod has a plurality ofly along the circumference evenly distributed of supporting part.

Through above-mentioned technical scheme, the support frame can carry out firm support to the drive gear, and the setting of connecting rod is difficult for blockking the wind-force of fan.

Preferably, the supporting frame is provided with a mounting groove, a second bearing is arranged in the mounting groove, the end part of the driven shaft departing from the first bearing penetrates into the second bearing, and the second bearing is rotatably connected between the driven shaft and the supporting frame.

Through the technical scheme, the stable rotation of the driven shaft and the fan can be realized through the bearing I and the bearing II; after the support frame is dismantled from the fan housing, further can carry out the dismouting to driven shaft and fan.

Preferably, the support frame is provided with a dust screen, and the dust screen covers the position of the opening of the inner gear ring facing the fan.

Through above-mentioned technical scheme, the dust screen is used for preventing that the dust from getting into the meshing position of each gear.

Preferably, the rotating shaft comprises an end block arranged at the end part, the inner gear ring is arranged on the end block, a countersunk hole is formed in the center of the end block, a countersunk bolt penetrates through the countersunk hole, a threaded hole is formed in the end part of the rotating shaft, and the countersunk bolt is in threaded connection with the threaded hole.

Through the technical scheme, the inner gear ring can be machined on the end block, and then the end block is mounted on the rotating shaft, so that the inner gear ring can be machined conveniently.

Preferably, the end part of the rotating shaft is provided with a mounting groove for embedding the end block, and the relative rotation between the rotating shaft and the end block is limited by a key groove structure.

Through the technical scheme, the rotating shaft can accurately limit the end block, so that the end block can be conveniently installed, and the end block cannot rotate relatively.

To sum up, the utility model discloses the beneficial effect who contrasts in prior art does:

1. the motor can improve the rotating speed of the fan and has better heat dissipation effect;

2. each part of the motor can be conveniently disassembled and assembled.

Drawings

FIG. 1 is a perspective view of a variable frequency speed-regulating three-phase asynchronous motor of an embodiment;

FIG. 2 is a half sectional view of the embodiment;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is an exploded view of the embodiment.

In the figure, 1, a housing; 11. a housing; 12. a fan housing; 13. a support frame; 2. a rotating shaft; 3. a driven shaft; 31. a fan; 111. heat dissipation convex ribs; 32. a first bearing; 21. an end-block; 22. an inner gear ring; 23. mounting grooves; 211. a countersunk hole; 212. a countersunk bolt; 231. a threaded hole; 33. a driven gear; 131. a fixed part; 132. a support portion; 133. a connecting rod; 4. a transmission gear; 134. a second bearing; 5. a dust screen.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a variable frequency speed control three-phase asynchronous motor, including casing 1, casing 1 is equipped with pivot 2 in the casing 11 including the shell 11 that is fixed with the stator, locate the fan housing 12 of 11 tip of shell, locate support frame 13 between shell 11 and fan housing 12, pivot 2 is fixed with the rotor. The driven shaft 3 is rotatably arranged in the fan cover 12, the fan 31 is coaxially fixed on the outer wall of the driven shaft 3, the driven shaft 3 coincides with the axis of the rotating shaft 2, and transmission is established between the rotating shaft 2 and the driven shaft 3 in a gear meshing mode.

The housing 11 and the fan housing 12 are fixed by bolts, a plurality of heat dissipation ribs 111 are circumferentially arranged on the outer wall of the housing 11, and a gap for air circulation is left between the fan housing 12 and the housing 11 and is specifically formed between the adjacent heat dissipation ribs 111. The driven shaft 3 and the fan cover 12 are rotatably connected through a first bearing 32, and the first bearing 32 is located at the end part, away from the rotating shaft 2, of the driven shaft 3. When the fan 31 rotates, the wind blown from the fan 31 blows between the adjacent heat dissipating ribs 111, thereby dissipating heat from the housing 11.

Referring to fig. 3 and 4, the rotating shaft 2 includes an end block 21 provided at an end portion, the end block 21 being located at an end portion of the rotating shaft 2 facing the driven shaft 3, and an end surface of the end block 21 facing the driven shaft 3 being provided with an internally toothed ring 22. The end block 21 can be assembled with and disassembled from the rotating shaft 2 body, the end part of the rotating shaft 2 is provided with a mounting groove 23 for the end block 21 to be embedded in, and the relative rotation between the rotating shaft 2 and the end block 21 is limited by arranging a key groove structure. The center of end block 21 is equipped with counter bore 211, wears to be equipped with countersunk bolt 212 in the counter bore 211, and the pivot 2 tip is equipped with screw hole 231, and screw hole 231 is located the tank bottom of mounting groove 23, and countersunk bolt 212 and screw hole 231 threaded connection.

A driven gear 33 is fixed at the end part of the driven shaft 3 facing the rotating shaft 2, the driven gear 33 is positioned in the inner gear ring 22, and the axis of the driven gear 33 is superposed with the axis of the inner gear ring 22. The support frame 13 includes a fixing portion 131 fixed to the wind shield 12 and a supporting portion 132 close to the driven shaft 3, the supporting portion 132 and the fixing portion 131 are fixed by a connecting rod 133 disposed therebetween, and a plurality of connecting rods 133 are uniformly distributed along the circumferential direction of the supporting portion 132; the support frame 13 is fixed to the hood 12 by bolts inserted through the fixing portion 131. The supporting part 132 surrounds the driven shaft 3 in an annular shape, the supporting part 132 is rotatably provided with a transmission gear 4, and the transmission gear 4 is simultaneously meshed with the inner gear ring 22 and the driven gear 33.

The second bearing 134 is arranged on the support frame 13, the second bearing 134 is specifically embedded in the support portion 132, the end portion of the driven shaft 3 departing from the first bearing 32 penetrates into the second bearing 134, and the second bearing 134 is rotatably connected between the driven shaft 3 and the support frame 13. The first bearing 32 and the second bearing 134 can realize stable rotation of the driven shaft 3 and the fan 31.

The supporting frame 13 is further provided with a dust screen 5, the dust screen 5 is fixed on the end surface of the supporting portion 132 facing the rotating shaft 2 through a rod, and the dust screen 5 shields the opening portion of the internal gear ring 22 facing the fan 31 and is used for preventing dust from entering the meshing portion of each gear. The dustproof net 5 is provided with holes avoiding the transmission gear 4 and the driven shaft 3.

In summary, when the motor is operated, the rotating shaft 2 rotates, the inner gear ring 22 rotates, and through the meshing action of the gear teeth, the inner gear ring 22 drives the driven gear 33 to rotate through the transmission gear 4, and further drives the driven shaft 3 and the fan 31 to rotate. The inner gear ring 22, the transmission gear 4 and the driven gear 33 form an accelerating structure, so that the rotating speed of the fan 31 is higher than that of the rotating shaft 2, and the fan has a better heat dissipation effect compared with the prior art. And each subassembly of this motor is convenient for the dismouting, and the rotation of fan 31 is stable, and the setting of connecting rod 133 is difficult for blockking the wind-force of fan 31.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a Variable Frequency Speed Governing (VFSG) three-phase asynchronous machine, includes casing (1), be equipped with pivot (2) and fan (31) in casing (1), characterized by: the utility model discloses a fan, including casing (1), driven shaft (3), pivot (2), fan (31), drive shaft (3) and the axis coincidence of pivot (2), fan (31) are fixed in on driven shaft (3), the tip of pivot (2) orientation driven shaft (3) is equipped with ring gear (22), the tip of driven shaft (3) orientation pivot (2) is fixed with driven gear (33), driven gear (33) are located ring gear (22), be provided with drive gear (4) between driven gear (33) and ring gear (22), drive gear (4) are connected with casing (1) rotation, drive gear (4) mesh with ring gear (22), driven gear (33) simultaneously.

2. The variable-frequency speed-regulating three-phase asynchronous motor according to claim 1, which is characterized in that: casing (1) is including shell (11) that is fixed with the stator, locate fan housing (12) of shell (11) tip, leave the clearance that supplies circulation of air between fan housing (12), shell (11), shell (12) are fixed through the bolt, establish the rotation between driven shaft (3), fan housing (12) and connect through setting up bearing (32).

3. The variable-frequency speed-regulating three-phase asynchronous motor as claimed in claim 2, wherein: the casing (1) further comprises a support frame (13) located between the shell (11) and the fan housing (12), the support frame (13) and the fan housing (12) are fixed through bolts, and the transmission gear (4) is rotatably arranged on the support frame (13).

4. A variable frequency speed-regulating three-phase asynchronous motor as claimed in claim 3, wherein: the supporting frame (13) comprises a fixing portion (131) fixed with the fan cover (12) and a supporting portion (132) connected with the transmission gear (4) in a rotating mode, the supporting portion (132) and the fixing portion (131) are fixed through a connecting rod (133) arranged between the supporting portion and the fixing portion, and the connecting rod (133) is evenly distributed along the circumferential direction of the supporting portion (132) in a plurality.

5. A variable frequency speed-regulating three-phase asynchronous motor as claimed in claim 3, wherein: be equipped with bearing two (134) on support frame (13), the tip that deviates from bearing one (32) driven shaft (3) penetrates in bearing two (134), rotation connection is established between driven shaft (3), support frame (13) in bearing two (134).

6. A variable frequency speed-regulating three-phase asynchronous motor as claimed in claim 3, wherein: be equipped with dust screen (5) on support frame (13), dust screen (5) shelter from ring gear (22) in the oral area position towards fan (31).

7. The variable-frequency speed-regulating three-phase asynchronous motor according to claim 1, which is characterized in that: the rotating shaft (2) comprises an end block (21) arranged at the end part, the inner gear ring (22) is arranged on the end block (21), a countersunk hole (211) is formed in the center of the end block (21), a countersunk bolt (212) penetrates through the countersunk hole (211), a threaded hole (231) is formed in the end part of the rotating shaft (2), and the countersunk bolt (212) is in threaded connection with the threaded hole (231).

8. The variable-frequency speed-regulating three-phase asynchronous motor according to claim 7, which is characterized in that: the end part of the rotating shaft (2) is provided with a mounting groove (23) for embedding the end block (21), and the relative rotation between the rotating shaft (2) and the end block (21) is limited by arranging a key groove structure.