Stator and rotor structure for volute fan and volute fan

Abstract

The utility model discloses a stator and rotor structure for a volute fan and the volute fan, and relates to the technical field of volute fans. The stator and rotor structure for the volute fan comprises a rotor and a stator surrounding the circumferential side of the rotor, a plurality of magnetic pole grooves are formed in the rotor in the circumferential direction of the rotor, an insertion piece is contained in each magnetic pole groove, and at least one end of each insertion piece protrudes out of the corresponding magnetic pole groove. According to the stator and rotor structure, the insertion pieces protruding out of the magnetic pole grooves on the stator and rotor structure can be matched with the rotor to form a salient pole structure, magnetic resistance generated when the rotor rotates is reduced, the rotating speed of the rotor is increased, the rotor can rotate at a high speed, and the cleaning efficiency of the dust collector is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of volute blowers, and in particular to a stator and rotor structure for a volute blower and a volute blower. Background Art

[0002] With the continuous development of the household appliance market, consumers are increasingly demanding the performance of frequently used products such as vacuum cleaners. As one of the core components of a vacuum cleaner, the performance of the volute blower directly affects its service life and cleaning efficiency.

[0003] The rotor of the existing volute fan is affected by magnetic resistance during rotation and cannot rotate at high speed, which greatly reduces the cleaning efficiency of the vacuum cleaner. Utility Model Content

[0004] One object of the present application is to overcome the deficiencies of the prior art and to provide a stator-rotor structure for a volute blower, wherein the rotor of the stator-rotor structure is capable of rotating at high speed.

[0005] The stator and rotor structure provided in this application adopts the following technical solution:

[0006] A stator and rotor structure for a volute blower includes a rotor and a stator surrounding the rotor. The rotor is provided with a plurality of magnetic pole slots around its circumference. Each magnetic pole slot contains an insert, and at least one end of the insert protrudes from the magnetic pole slot.

[0007] By adopting the above technical solution, the insert protruding from the magnetic pole slot can cooperate with the rotor to form a salient pole structure, which reduces the magnetic resistance when the rotor rotates, increases the rotor speed, enables the rotor to rotate at high speed, and effectively improves the cleaning efficiency of the vacuum cleaner.

[0008] In a specific possible implementation scheme, the magnetic pole slot includes a rectangular slot body and two extension slots located at both ends of the slot body. The insert is accommodated in the slot body, and a magnetic isolation bridge is formed between the slot wall at one end of the extension slot away from the insert and the outer wall surface of the rotor.

[0009] By adopting the above technical solution, it is effectively avoided that the insert is too close to the magnetic isolation bridge and interferes with the magnetic isolation bridge.

[0010] In a specific possible implementation scheme, the extension groove includes a triangular groove and a trapezoidal groove arranged side by side, the arrangement direction of the triangular groove and the trapezoidal groove is perpendicular to the extension direction of the groove body, and the top corner end of the triangular groove and the short side of the trapezoidal groove are respectively connected to the two side groove walls of the groove body.

[0011] By adopting the above technical solution, the short side of the trapezoidal slot can provide space for the insert, which facilitates the installation of the insert in the pole slot, while the triangular slot can limit the insert to prevent the insert from shaking during the rotation of the rotor.

[0012] In a specific embodiment, the magnetic isolation bridge is formed between the oblique side of the trapezoidal slot and the outer wall surface of the rotor.

[0013] By adopting the above technical solution, it is effectively avoided that the insert is too close to the magnetic isolation bridge and interferes with the magnetic isolation bridge.

[0014] In a specific possible implementation scheme, an air gap is formed between the outer wall surface of the rotor and the inner wall surface of the stator, and the air gap includes a plurality of first air gap segments arranged around the circumference of the rotor, and the size of each of the first air gap segments gradually increases from the middle to the edge.

[0015] By adopting the above technical solution, multiple first air gap segments can be combined into an air gap of uneven size. The magnetic flux density distribution in the air gap is closer to a sine wave, which is beneficial to reducing the cogging torque of the volute fan. At the same time, the uneven air gap helps to optimize the sinusoidality of the back electromotive force waveform of the volute fan, weaken the high-order harmonics, and make the fundamental wave account for a higher proportion, thereby reducing the ripple torque, reducing the torque pulsation, and making the volute fan run smoother.

[0016] In a specific possible implementation scheme, the outer wall surface of the rotor includes a plurality of arc-shaped first wall segments, and the plurality of first wall segments are arranged around the circumference of the rotor, and the first air gap segment is formed between each of the first wall segments and the inner wall surface of the stator.

[0017] By adopting the above technical solution, the arc-shaped first wall segment can cooperate with the inner wall surface of the stator to form an uneven first air gap segment, and multiple uneven first air gap segments can effectively improve the performance of the volute blower; at the same time, the arc-shaped first wall segment can form a protrusion on the side of the rotor, and multiple protrusions cooperate with multiple inserts protruding from the magnetic pole slots, which can further reduce the magnetic resistance when the rotor rotates, thereby further improving the rotor speed.

[0018] In a specific embodiment, there is a second air gap segment between each two adjacent first air gap segments, and the size of the second air gap segment gradually decreases from the middle to the edge.

[0019] By adopting the above technical solution, multiple second air gap segments can cooperate with multiple first air gap segments, further improving the unevenness of the air gap, thereby more effectively reducing the cogging torque of the volute fan and further optimizing the sinusoidality of its back electromotive force waveform.

[0020] In a specific possible implementation scheme, a second wall segment is provided between each two adjacent first wall segments, the second wall segment is a plane, the stator is annular and a plurality of stator teeth are spaced apart on its inner circumference, a winding slot is formed between each two adjacent stator teeth, the stator tooth has an arcuate surface at one end away from the stator, and the second air gap segment is formed between the arcuate surface and the second wall segment.

[0021] By adopting the above technical solution, the plane of the second wall segment can cooperate with the arc surface of the stator tooth to form an uneven second air gap segment. Multiple uneven second air gap segments can effectively improve the performance of the volute blower.

[0022] Another object of the present application is to provide a volute blower.

[0023] The volute fan provided in this application adopts the following technical solution:

[0024] A volute fan comprises a fan body, wherein a mounting groove is provided on one side of the fan body, and the stator and rotor structure as described above is arranged in the mounting groove.

[0025] By adopting the above technical solution, the volute blower provided with the above stator and rotor structure can run at high speed, which greatly improves the cleaning efficiency of the vacuum cleaner.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] The insert protruding from the magnetic pole slot can cooperate with the rotor to form a salient pole structure, which reduces the magnetic resistance when the rotor rotates, increases the speed of the rotor, enables the rotor to rotate at high speed, and effectively improves the cleaning efficiency of the vacuum cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the stator and rotor structure in Example 1 of the present application.

[0029] Figure 2 It is a front view of the stator and rotor structure in Example 1 of the present application.

[0030] Figure 3 yes Figure 2 A is an enlarged schematic diagram.

[0031] Figure 4 It is a structural diagram of the volute blower in Example 2 of the present application.

[0032] Description of reference numerals:

[0033] 1. Rotor; 11. First wall segment; 12. Second wall segment; 2. Stator; 3. Pole slot; 31. Slot body; 32. Extension slot; 321. Triangular slot; 322. Trapezoidal slot; 4. Insert; 5. Magnetic isolation bridge; 6. Air gap; 61. First air gap segment; 62. Second air gap segment; 7. Stator tooth; 8. Winding slot;

[0034] 100. Fan body; 101. Mounting slot. DETAILED DESCRIPTION

[0035] The present application is further described in detail below with reference to the accompanying drawings.

[0036] Example 1: See Figure 1-3 , which shows a stator and rotor structure for a volute blower, comprising a rotor 1 and a stator 2 coaxially surrounding the rotor 1. The stator 2 has an outer diameter of 30-40 mm, an inner diameter of 10-15 mm, and a thickness of 4-10 mm; the rotor 1 has an outer diameter of 10-20 mm.

[0037] Combine Figure 1-2 As shown, the rotor 1 is provided with four magnetic pole slots 3 around its circumference. Each magnetic pole slot 3 houses an insert 4, one end of which protrudes from the magnetic pole slot 3. The insert 4 protruding from the magnetic pole slot 3 cooperates with the rotor 1 to form a salient pole structure, reducing the magnetic resistance of the rotor 1 during rotation, increasing the speed of the rotor 1, and enabling high-speed rotation of the rotor 1, thereby effectively improving the cleaning efficiency of the vacuum cleaner.

[0038] In this embodiment, combined with Figure 3 As shown, the magnetic pole slot 3 includes a rectangular slot body 31 and two extension slots 32 located at either end of the slot body 31. The insert 4 is accommodated in the slot body 31. A magnetic isolation bridge 5 is formed between the slot wall at the end of the extension slot 32 away from the insert 4 and the outer wall of the rotor 1. Placing the magnetic isolation bridge 5 away from the insert 4 can effectively prevent the insert 4 from getting too close to the magnetic isolation bridge 5 and interfering with the bridge.

[0039] In this embodiment, the extension slot 32 includes a triangular slot 321 and a trapezoidal slot 322 arranged side by side. The triangular slot 321 and the trapezoidal slot 322 are arranged perpendicular to the extension direction of the slot body 31. The top corner of the triangular slot 321 and the short side of the trapezoidal slot 322 are respectively connected to the two side slot walls of the slot body 31. The magnetic isolation bridge 5 is formed between the oblique side of the trapezoidal slot 322 and the outer wall of the rotor 1. The short side of the trapezoidal slot 322 provides space for the insert 4, facilitating its installation in the magnetic pole slot 3. The triangular slot 321 limits the insert 4 to prevent it from shaking during the rotation of the rotor 1.

[0040] In this embodiment, again combined Figure 1-2As shown, an air gap 6 is formed between the outer wall surface of the rotor 1 and the inner wall surface of the stator 2. The air gap 6 includes a plurality of first air gap segments 61 and second air gap segments 62 arranged at intervals around the circumference of the rotor 1. There are four first air gap segments 61 and four second air gap segments 62. The size of each first air gap segment 61 gradually increases from the center to the edge, and the size of each second air gap segment 62 gradually decreases from the center to the edge.

[0041] In this way, the four first air gap segments 61 and the four second air gap segments 62 can be combined into an air gap 6 of uneven size. The magnetic flux density distribution in the air gap 6 is closer to a sine wave, which is beneficial to reducing the cogging torque of the volute fan. At the same time, the uneven air gap 6 helps to optimize the sinusoidality of the back electromotive force waveform of the volute fan, weaken the high-order harmonics, and make the fundamental wave account for a higher proportion, thereby reducing the ripple torque, reducing the torque pulsation, and making the volute fan run smoother.

[0042] In this embodiment, the outer wall of the rotor 1 includes four arcuate first wall segments 11, which are arranged around the circumference of the rotor 1. A first air gap segment 61 is formed between each first wall segment 11 and the inner wall of the stator 2. The arcuate first wall segment 11 can cooperate with the inner wall of the stator 2 to form an uneven first air gap segment 61. The four uneven first air gap segments 61 can effectively improve the performance of the volute blower. At the same time, the arcuate first wall segment 11 can form a protrusion on the side of the rotor 1. The four protrusions cooperate with the four inserts 4 protruding from the magnetic pole slots 3 to further reduce the magnetic resistance of the rotor 1 during rotation, thereby further improving the rotation speed of the rotor 1. The four first wall segments 11 correspond one-to-one to the four magnetic pole slots 3, and each magnetic pole slot 3 extends along the chord length direction of the corresponding first wall segment 11.

[0043] In this embodiment, a second wall segment 12 is provided between each pair of adjacent first wall segments 11. The second wall segment 12 is planar. The stator 2 is annular and has six stator teeth 7 spaced apart on its inner circumference. A winding slot 8 is formed between each pair of adjacent stator teeth 7. The end of the stator tooth 7 facing away from the stator 2 has an arcuate surface. A second air gap segment 62 is formed between the arcuate surface and the second wall segment 12. The planar surface of the second wall segment 12 cooperates with the arcuate surface of the stator tooth 7 to form an uneven second air gap segment 62. The four uneven second air gap segments 62 can effectively improve the performance of the volute blower.

[0044] In this embodiment, the six winding slots 8 and the four first wall segments 11 form a six-slot four-pole structure. This design enables the volute blower to generate a specific magnetic field and torque during operation, further improving the performance of the volute blower.

[0045] Example 2: See Figure 4As shown, a volute fan is shown, including a fan body 100, a mounting groove 101 is provided on one side of the fan body 100, and the stator and rotor structure in Example 1 is provided in the mounting groove 101. The stator and rotor structure are coaxially connected to the impeller in the fan body 100. The volute fan provided with the stator and rotor structure can run at high speed, greatly improving the cleaning efficiency of the vacuum cleaner.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A stator and rotor structure for a volute blower, comprising a rotor (1) and a stator (2) surrounding the rotor (1), characterized in that: The rotor (1) is provided with a plurality of magnetic pole slots (3) around its own circumference, and each magnetic pole slot (3) contains an insert (4), and at least one end of the insert (4) protrudes from the magnetic pole slot (3).

2. The stator and rotor structure for a volute blower according to claim 1, characterized in that: The magnetic pole slot (3) comprises a rectangular slot body (31) and two extension slots (32) respectively located at two ends of the slot body (31); the insert (4) is accommodated in the slot body (31); a magnetic isolation bridge (5) is formed between a slot wall at one end of the extension slot (32) away from the insert (4) and an outer wall surface of the rotor (1).

3. The stator and rotor structure for a volute blower according to claim 2, characterized in that: The extension groove (32) comprises a triangular groove (321) and a trapezoidal groove (322) arranged side by side, the arrangement direction of the triangular groove (321) and the trapezoidal groove (322) being perpendicular to the extension direction of the groove body (31), and the top corner end of the triangular groove (321) and the short side of the trapezoidal groove (322) being respectively connected to the groove walls on both sides of the groove body (31).

4. The stator and rotor structure for a volute blower according to claim 3, characterized in that: The magnetic isolation bridge (5) is formed between the oblique side of the trapezoidal slot (322) and the outer wall surface of the rotor (1).

5. The stator and rotor structure for a volute blower according to any one of claims 1 to 4, characterized in that: An air gap (6) is formed between the outer wall surface of the rotor (1) and the inner wall surface of the stator (2), and the air gap (6) includes a plurality of first air gap segments (61) arranged circumferentially around the rotor (1), and the size of each first air gap segment (61) gradually increases from the middle to the edge.

6. The stator and rotor structure for a volute blower according to claim 5, characterized in that: The outer wall surface of the rotor (1) comprises a plurality of arc-shaped first wall segments (11), the plurality of first wall segments (11) being arranged around the circumference of the rotor (1), and a first air gap segment (61) being formed between each of the first wall segments (11) and the inner wall surface of the stator (2).

7. The stator and rotor structure for a volute blower according to claim 6, characterized in that: A second air gap section (62) is provided between each two adjacent first air gap sections (61), and the size of the second air gap section (62) gradually decreases from the middle to the edge.

8. The stator and rotor structure for a volute blower according to claim 7, characterized in that: A second wall segment (12) is provided between each two adjacent first wall segments (11), the second wall segment (12) being a plane, the stator (2) being annular and having a plurality of stator teeth (7) spaced apart on its inner circumference, a winding slot (8) being formed between each two adjacent stator teeth (7), the stator teeth (7) having an arcuate surface at one end away from the stator (2), and the second air gap segment (62) being formed between the arcuate surface and the second wall segment (12).

9. A volute fan, comprising a fan body (100), characterized in that: A mounting groove (101) is provided on one side of the fan body (100), and a stator and rotor structure according to any one of claims 1 to 8 is provided in the mounting groove (101).

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