Shaded-pole motor with low wind noise

Abstract

The present application relates to the field of shaded-pole motors, and discloses a shaded-pole motor with low wind noise, including a stator core, a rotor located in the stator core, a support member fixed on the stator core and used to support the rotor, and a main winding located on the stator core, a noise reduction cover arranged on the rotor is arranged between the support member and the stator core; the noise reduction cover comprises: a cover, located between the support member and the rotor, an axial hole is opened on the cover and sleeved on the rotating shaft rod of the rotor, the cover is fixed on the support member, and densely distributed sound-absorbing holes are opened on the cover; a sound insulation cotton ring is bonded to the axial hole of the cover; a contact ring is formed on the edge of the cover; a noise reduction cotton ring is bonded to the contact ring and used to conflict with the stator core. The present application solves the technical problem in the prior art that due to the simple structure of the shaded-pole motor, no measures have been taken to reduce the noise of the shaded-pole motor, and realizes that the noise reduction cover is covered on the shaft seat of the shaded-pole motor rotor, which can reduce the noise generated by wind noise and friction of the rotor.

Description

Technical Field

[0001] The present application relates to the field of shaded-pole motors, and in particular to shaded-pole motors with low wind noise. Background Art

[0002] The shaded pole motor is mainly composed of a rotor assembly and a stator assembly. The stator assembly is mainly composed of a stator core, a main winding and a short-circuit ring. The cast aluminum rotor in the rotor assembly is installed in the stator core through a shaft seat fixed on the stator core. The shaded pole motor is widely used due to its simple structure, small size and low failure rate.

[0003] However, in the process of implementing relevant technical solutions, it was found that at least the following technical problems exist: part of the noise of the shaded pole motor is generated by the friction of the rotor. Due to the simple structure of the shaded pole motor, no measures have been taken to reduce the noise of the shaded pole motor. Therefore, a shaded pole motor with reduced noise is urgently needed. Summary of the invention

[0004] The present application provides a shaded-pole motor with low wind noise, thereby solving the technical problem in the prior art that due to the simple structure of the shaded-pole motor, no measures have been taken to reduce the noise of the shaded-pole motor. The present application realizes that a noise reduction cover is provided on the rotor shaft seat of the shaded-pole motor, which can reduce the noise generated by wind noise and friction of the rotor.

[0005] The present application provides a shaded-pole motor with low wind noise, comprising a stator core, a rotor located in the stator core, a support member fixed on the stator core and used to support the rotor, and a main winding located on the stator core, wherein a noise reduction cover covering the rotor is arranged between the support member and the stator core; the noise reduction cover comprises: a cover, located between the support member and the rotor, the cover having an axial hole and being sleeved on the rotating shaft of the rotor, the cover being fixed to the support member, and the cover having densely distributed sound-absorbing holes; a sound-insulating cotton ring, bonded to the axial hole of the cover and in conflict with the rotating shaft of the rotor; a contact ring, formed on the edge of the cover and parallel to the stator core; a noise-reducing cotton ring, bonded to the contact ring and used to conflict with the stator core.

[0006] Furthermore, the cover is composed of multiple ring pieces, and the cover includes: a vertical ring piece, which is fixedly connected to a side of the contact ring away from the stator core, and the vertical ring piece is perpendicular to the contact ring; a slanted lower ring piece, which is integrally formed with a side of the vertical ring piece away from the contact ring, and the side of the slanted lower ring piece away from the vertical ring piece is toward the rotating shaft rod and inclined in a direction away from the rotor; an open hole ring piece, which is integrally formed with a side of the slanted lower ring piece away from the vertical ring piece, and the side of the open hole ring piece away from the slanted lower ring piece is inclined in a direction close to the rotor, and the sound absorbing hole is opened on the open hole ring piece; a V-shaped ring piece, which is integrally formed with a side of the open hole ring piece away from the slanted lower ring piece, and the inner concave surface of the V-shaped ring piece faces the rotor; a fixed ring piece, which is integrally formed with a side of the V-shaped ring piece away from the open hole ring piece, the fixed ring piece is fixed to the support member, and the shaft hole is opened on the fixed ring piece.

[0007] Furthermore, the oblique lower ring sheet is provided with densely distributed hexagonal holes, and a hexagonal tube is inserted into each of the hexagonal holes.

[0008] Furthermore, the outer surface of the oblique lower ring piece is bonded with sound-insulating cotton cloth, and the end surface of the hexagonal tube is in contact with the sound-insulating cotton cloth.

[0009] Furthermore, the connections between the vertical ring piece, the downwardly inclined ring piece, the perforated ring piece, the V-shaped ring piece and the fixed ring piece are all rounded.

[0010] Furthermore, the support member is provided with an insertion hole, which is a conical hole and has a diameter larger at one end close to the rotor than at the other end, and the cover is fixedly connected with an insertion column inserted in the insertion hole.

[0011] Furthermore, the interior of the plug post is hollow and one end facing the rotor is open, the cover is provided with an opening, the opening is connected to the inner cavity of the plug post, and the inner cavity of the plug post is filled with sound-absorbing cotton.

[0012] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0013] Due to the use of a wavy cover, the wavy cover can make the oblique lower ring piece become inclined, and the inclined lower ring piece can make the inner side of the oblique lower ring piece have enough space to place the hexagonal tube, and by using densely distributed hexagonal tubes, the inner side of the oblique lower ring piece can be formed into a honeycomb shape, which can effectively play a sound absorption role, and the wavy cover can make the sound waves generated by the high-speed rotation of the rotor swirl in the wave crest, thereby reducing the noise. In addition, the wavy cover can also increase the overall space between the cover and the rotor, further increasing the heat dissipation space, and the wavy cover can also increase the rigidity of the entire cover, which can reduce the deformation of the cover when the support is locked and squeezed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the shaded-pole motor in an embodiment of the present application;

[0015] Figure 2 for Figure 1 Another view of the middle shaded pole motor;

[0016] Figure 3 for Figure 1 An exploded schematic diagram of part of the structure of a medium shaded pole motor;

[0017] Figure 4 for Figure 1 Schematic diagram of the overall structure of the middle noise reduction cover;

[0018] Figure 5 for Figure 1 A cross-sectional view of the middle structure;

[0019] Figure 6 for Figure 5 A magnified schematic diagram of part A;

[0020] In the figure: 1. stator core; 2. rotor; 21. shaft rod; 3. support; 31. socket; 4. noise reduction cover; 41. cover; 4101. shaft hole; 4102. sound absorbing hole; 4103. opening; 411. vertical ring piece; 412. oblique ring piece; 4121. hexagonal hole; 413. opening ring piece; 414. V-shaped ring piece; 415. fixed ring piece; 42. sound insulation cotton ring; 43. contact ring; 44. noise reduction cotton ring; 45. hexagonal tube; 46. sound insulation cotton cloth; 47. plug post; 471. sound absorbing cotton; 5. main winding. DETAILED DESCRIPTION

[0021] The embodiment of the present application discloses a shaded-pole motor with low wind noise. By placing two noise reduction covers 4 on both sides of the stator core 1 respectively, the sound insulation cotton ring 42 in the noise reduction cover 4 can reduce the hard friction between the rotor 2 and the cover 41, and the noise reduction cotton ring 44 in the noise reduction cover 4 can make the contact between the cover 41 and the stator core 1 a soft contact, thereby reducing the noise generated by friction and improving the sound insulation effect of the noise reduction cover 4. Moreover, since the entire cover 41 is wavy, the wavy cover 41 can make the sound waves generated by the high-speed rotation of the rotor 2 swirl into the wave crest, thereby reducing the noise. In addition, the wavy cover 41 can also increase the overall space between the cover 41 and the rotor 2, further increasing the heat dissipation space, and the wavy cover 41 can also increase the rigidity of the entire cover 41, thereby reducing the deformation of the cover 41 caused by the support member 3 when locking and squeezing the cover 41.

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, a shaded-pole motor with low wind noise includes a stator core 1, a rotor 2, a support 3, a noise reduction cover 4 and a main winding 5. The rotor 2 is located in the stator core 1, two support members 3 are provided and are respectively fixed on both sides of the stator core 1, a rotating shaft rod 21 on the rotor 2 passes through the shaft seat in the support member 3, two noise reduction covers 4 are provided and are respectively located on both sides of the stator core 1, the noise reduction cover 4 on each side is located between the support member 3 and the stator core 1, and the main winding 5 is installed on the stator core 1.

[0024] Reference Figure 4 , Figure 5 as well as Figure 6As shown, the noise reduction cover 4 includes a cover 41, a sound insulation cotton ring 42, a contact ring 43, a noise reduction cotton ring 44, a hexagonal tube 45, a sound insulation cotton cloth 46 and a plug 47. The cover 41 is located between the support 3 and the rotor 2, and an axial hole 4101 is opened on the cover 41. The diameter of the axial hole 4101 is larger than the diameter of the rotating shaft 21 of the rotor 2. The cover 41 is sleeved on the rotating shaft 21 of the rotor 2 by using the axial hole 4101. The support member 3 is provided with a plug hole 31, and there are several plug holes 31 and they are evenly distributed along the circumference of the rotating shaft rod 21. The plug hole 31 is a conical hole, and the diameter of the conical hole near one end of the rotor 2 is larger than the diameter of the other end. The cover 41 is fixed with several plug posts 47 distributed and inserted in each plug hole 31, and the plug posts 47 are also conical posts. The cover 41 can be fixed to the support member 3 by using the plug posts 47. In addition, the plug posts 47 are hollow inside and the end facing the rotor 2 is open. The cover 41 is provided with an opening 4103, which is connected to the inner cavity of the plug posts 47. The inner cavity of the plug posts 47 is filled with sound-absorbing cotton 471, which can further absorb noise. Furthermore, the cover 41 is provided with densely distributed sound-absorbing holes 4102, which can absorb the noise generated by the high-speed rotation of the rotor 2, and the sound-absorbing holes 4102 can also have the effect of heat dissipation.

[0025] Reference Figure 4 and Figure 6 As shown, the sound insulation cotton ring 42 is bonded to the shaft hole 4101 of the cover 41 and contacts the rotating shaft rod 21 of the rotor 2. The sound insulation cotton ring 42 can reduce the hard friction between the rotor 2 and the cover 41, and can also achieve a sealing effect to reduce the spread of noise.

[0026] Continue to refer to Figure 4 , Figure 5 as well as Figure 6 As shown, the contact ring 43 is integrally formed with the cover 41, the contact ring 43 is formed at the edge of the cover 41 and is parallel to the side wall of the stator core 1, and the width of the contact ring 43 is greater than the thickness of the cover 41, so that the contact area of ​​the edge of the cover 41 can be increased. The noise reduction cotton ring 44 is bonded to the contact ring 43, and the noise reduction cotton ring 44 is in conflict with the stator core 1. The noise reduction cotton ring 44 can make the contact between the cover 41 and the stator core 1 soft, reduce the noise generated by friction, and absorb the noise.

[0027] When installing the shaded-pole motor, first place the rotor 2 in the stator core 1, then place the two noise reduction covers 4 on both sides of the stator core 1, and make the two noise reduction covers 4 both sleeved on the rotating shaft rod 21, then place the two support members 3 on both sides of the stator core 1, and then insert the plug 47 on the cover 41 in the noise reduction cover 4 into the plug hole 31 of the support member 3. At this time, the noise reduction cotton ring 44 on the edge of the noise reduction cover 4 can be made to contact the stator core 1, and the sound insulation cotton ring 42 can contact the rotating shaft rod 21 of the rotor 2, so as to complete the fixed installation of the noise reduction cover 4, and finally lock the support member 3 to the stator core 1. During the locking process of the support member 3, the noise reduction cotton ring 44 can make the contact between the cover 41 and the stator core 1 soft contact, thereby reducing the noise generated by friction, and the sound insulation cotton ring 42 can reduce the hard friction between the rotor 2 and the cover 41, and can also achieve a sealing effect to reduce the propagation of noise.

[0028] Reference Figure 4 and Figure 6 As shown, the cover 41 is composed of multiple ring pieces, and the cover 41 includes an integrally formed vertical ring piece 411 , a slanted downward ring piece 412 , an opening 4103 ring piece, a V-shaped ring piece 414 and a fixed ring piece 415 .

[0029] Reference Figure 6 As shown, the vertical ring piece 411 is fixedly connected to the side of the contact ring 43 facing away from the stator core 1, and the vertical ring piece 411 is perpendicular to the contact ring 43. When the cover 41 is covered on the rotor 2, the vertical ring piece 411 is perpendicular to the side wall of the stator core 1.

[0030] Reference Figure 6 As shown, the oblique lower ring piece 412 is integrally formed with a side of the vertical ring piece 411 away from the contact ring 43, and the side of the oblique lower ring piece 412 away from the vertical ring piece 411 is toward the shaft rod 21 and inclined in the direction away from the rotor 2. The oblique lower ring piece 412 is provided with densely distributed hexagonal holes 4121, and each hexagonal hole 4121 is inserted with a hexagonal tube 45. The densely distributed hexagonal tubes 45 can form a honeycomb shape on the inner side of the oblique lower ring piece 412, thereby effectively playing a sound absorption role, and the oblique lower ring piece 412 is inclined so that there is enough space on the inner side of the oblique lower ring piece 412 to place the hexagonal tube 45. In addition, the inner side of the oblique lower ring piece 412 is close to the outer peripheral surface of the rotor 2, and the outer peripheral surface of the rotor 2 is the main location where noise is emitted. Therefore, a plurality of hexagonal tubes 45 can form a honeycomb shape to be close to the noise emitted by the rotor 2, thereby further effectively absorbing sound. In addition, the outer surface of the oblique lower ring piece 412 is bonded with sound insulation cotton cloth 46, and the end face of the hexagonal tube 45 abuts against the sound insulation cotton cloth 46. The sound insulation cotton cloth 46 can prevent the hexagonal tube 45 from detaching from the cover 41, and also plays a role in sound insulation, so that the sound insulation effect of the cover 41 is better.

[0031] Reference Figure 6 As shown, the opening 4103 ring piece is integrally formed on a side of the oblique lower ring piece 412 away from the vertical ring piece 411, and the side of the opening 4103 ring piece away from the oblique lower ring piece 412 is inclined toward the direction close to the rotor 2, and the sound absorption hole 4102 is opened on the opening 4103 ring piece.

[0032] Reference Figure 6 As shown, the cross section of the V-shaped ring piece 414 is V-shaped, and the V-shaped ring piece 414 is integrally formed on one side of the opening 4103 away from the oblique lower ring piece 412 , and the inner concave surface of the V-shaped ring piece 414 faces the rotor 2 .

[0033] Reference Figure 6 As shown, the fixed ring piece 415 is integrally formed on one side of the V-shaped ring piece 414 away from the hole 4103 ring piece, the fixed ring piece 415 is fixed on the support member 3, the shaft hole 4101 is opened on the fixed ring piece 415, and the plug 47 is fixed on the fixed ring piece 415, thereby, the fixed ring piece 415 can be fixed on the support member 3.

[0034] In addition, refer to Figure 6 As shown, the connections between the vertical ring piece 411, the oblique downward ring piece 412, the opening 4103 ring piece, the V-shaped ring piece 414 and the fixed ring piece 415 are all rounded.

[0035] Thus, the entire cover 41 appears wavy, and the wavy cover 41 can cause the sound waves generated by the high-speed rotation of the rotor 2 to swirl in the wave crest, thereby reducing noise, and the wavy cover 41 can make the oblique lower ring piece 412 inclined, and the oblique lower ring piece 412 arranged obliquely can make the inner side of the oblique lower ring piece 412 have enough space to place the hexagonal tube 45. In addition, the wavy cover 41 can also increase the overall space between the cover 41 and the rotor 2, further increasing the heat dissipation space, and the wavy cover 41 can also increase the rigidity of the entire cover 41, which can reduce the deformation of the cover 41 when the support member 3 is locked and squeezed.

[0036] This application can explain its functional principle through the following operation methods:

[0037] When installing the shaded-pole motor, first place the rotor 2 in the stator core 1, then place the two noise reduction covers 4 on both sides of the stator core 1, and make the two noise reduction covers 4 both sleeved on the rotating shaft rod 21, then place the two support members 3 on both sides of the stator core 1, and then insert the plug 47 on the cover 41 in the noise reduction cover 4 into the socket 31 of the support member 3, and then fix the support member 3 on the stator core 1, at this time, the noise reduction cotton ring 44 on the edge of the noise reduction cover 4 can be made to contact the stator core 1.

[0038] At this time, the honeycomb shape formed by the hexagonal tube 45 on the inner side of the oblique downward slice on the cover 41 is close to the outer peripheral surface of the rotor 2, and the outer peripheral surface of the rotor 2 is the main location where noise is emitted, so that it can be close to the noise emitted by the rotor 2, and can effectively play a sound-absorbing role. Furthermore, since the entire cover 41 is wavy, the wavy cover 41 can make the sound waves generated by the high-speed rotation of the rotor 2 swirl in the wave crest, thereby reducing the noise. In addition, the wavy cover 41 can also increase the overall space between the cover 41 and the rotor 2, further increasing the heat dissipation space, and the wavy cover 41 can also increase the rigidity of the entire cover 41, which can reduce the deformation of the cover 41 when the support member 3 is locked and squeezed.

[0039] Furthermore, the use of the sound insulation cotton ring 42 can reduce the hard friction between the rotor 2 and the cover 41, and the use of the noise reduction cotton ring 44 can make the contact between the cover 41 and the stator core 1 a soft contact, thereby reducing the noise generated by friction and absorbing the noise, further improving the sound insulation effect of the noise reduction cover 4.

[0040] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0041] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A shaded-pole motor with low wind noise, comprising a stator core (1), a rotor (2) located in the stator core (1), a support (3) fixed to the stator core (1) and used to support the rotor (2), and a main winding (5) located on the stator core (1), characterized in that: A noise reduction cover (4) is provided between the support member (3) and the stator core (1) and is covered on the rotor (2); The noise reduction cover (4) comprises: a cover (41) located between the support member (3) and the rotor (2); an axial hole (4101) is provided on the cover (41) and is sleeved on the rotating shaft (21) of the rotor (2); the cover (41) is fixed on the support member (3); and densely distributed sound-absorbing holes (4102) are provided on the cover (41); A sound-insulating cotton ring (42) is bonded to the shaft hole (4101) of the cover (41) and contacts the rotating shaft (21) of the rotor (2); A contact ring (43) formed on the edge of the cover (41) and parallel to the stator core (1); A noise reduction cotton ring (44) is bonded to the contact ring (43) and is used to contact the stator core (1).

2. The shaded-pole motor with low wind noise as claimed in claim 1, characterized in that: The cover (41) is composed of multiple ring segments, and the cover (41) includes: A vertical ring piece (411) is fixedly connected to a side surface of the contact ring (43) facing away from the stator core (1), and the vertical ring piece (411) is perpendicular to the contact ring (43); A slanted lower ring piece (412) is integrally formed with a side edge of the vertical ring piece (411) away from the contact ring (43), and a side edge of the slanted lower ring piece (412) away from the vertical ring piece (411) faces the rotating shaft rod (21) and is inclined in a direction away from the rotor (2); The perforated ring piece (413) is integrally formed with a side edge of the oblique lower ring piece (412) away from the vertical ring piece (411), and the side edge of the perforated ring piece (413) away from the oblique lower ring piece (412) is inclined in a direction close to the rotor (2), and the sound absorbing hole (4102) is formed on the perforated ring piece (413); A V-shaped ring piece (414) is integrally formed with a side edge of the opening ring piece (413) away from the oblique lower ring piece (412), and the inner concave surface of the V-shaped ring piece (414) faces the rotor (2); The fixed ring piece (415) is integrally formed with a side edge of the V-shaped ring piece (414) away from the opening ring piece (413); the fixed ring piece (415) is fixed on the support member (3); and the shaft hole (4101) is provided on the fixed ring piece (415).

3. The shaded-pole motor with low wind noise as claimed in claim 2, characterized in that: The oblique lower ring piece (412) is provided with densely distributed hexagonal holes (4121), and a hexagonal tube (45) is inserted into each of the hexagonal holes (4121).

4. The shaded-pole motor with low wind noise as claimed in claim 3, characterized in that: The outer surface of the oblique lower ring piece (412) is bonded with a sound-insulating cotton cloth (46), and the end surface of the hexagonal tube (45) abuts against the sound-insulating cotton cloth (46).

5. The shaded-pole motor with low wind noise as claimed in claim 2, characterized in that: The connections between the vertical ring piece (411), the oblique downward ring piece (412), the perforated ring piece (413), the V-shaped ring piece (414) and the fixed ring piece (415) are all rounded.

6. The shaded-pole motor with low wind noise as claimed in claim 1, characterized in that: The support member (3) is provided with an insertion hole (31), the insertion hole (31) is a tapered hole, and the diameter of one end close to the rotor (2) is larger than that of the other end. The cover (41) is fixedly connected with an insertion column (47) inserted into the insertion hole (31).

7. The shaded-pole motor with low wind noise as claimed in claim 6, characterized in that: The interior of the plug post (47) is hollow and one end facing the rotor (2) is open. The cover (41) is provided with an opening (4103), and the opening (4103) is connected to the inner cavity of the plug post (47). The inner cavity of the plug post (47) is filled with sound-absorbing cotton (471).

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