Permanent magnet motor rotor structure with fan

Abstract

The invention belongs to the technical field of mechanical equipment manufacturing, and particularly relates to a permanent magnet motor rotor structure with a fan, which comprises a front end cover, a shell is arranged on one side of the front end cover, a stator winding is fixedly mounted in the shell, a rotor body is arranged on one side of the stator winding, and a fan mechanism is arranged on one side of the rotor body. A rotor iron core is fixedly installed on one side of the fan mechanism, a rear end cover is movably connected to one side of the rotor iron core, and the front end cover, the shell, the rotor iron core and the rear end cover jointly form a closed cavity; compared with the prior art, the permanent magnet motor has the advantages that the fan body is arranged, the fan on the permanent magnet motor rotor can drive air circulation in the permanent magnet motor, hot air at the end of the motor stator winding is blown to the permanent magnet motor shell for rapid heat exchange, the heat dissipation effect of the permanent magnet motor is enhanced, the space between the front end cover and the rotor iron core is utilized, and the service life of the permanent magnet motor is prolonged. Extra length of the permanent magnet motor is not needed.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical equipment manufacturing, and in particular relates to a permanent magnet motor rotor structure with a fan. Background Art

[0002] To ensure reliability and maintainability, permanent magnet motors usually adopt a fully enclosed structure. However, the fully enclosed structure results in air not circulating inside the motor, and the heat generated by the stator when the motor is working cannot be effectively dissipated through heat exchange with the motor casing in a timely manner. Therefore, the permanent magnet motor is designed to take into account the temperature rise of the motor stator and can only control the upper limit of the motor's rated power. As motor design develops towards high energy efficiency, compactness and low cost, it is necessary to increase the rated power upper limit of permanent magnet motors under the same volume conditions and enhance the heat dissipation effect of hot air inside the motor.

[0003] Patent document CN202322816622.9 discloses a rotor structure with a built-in fan and a permanent magnet motor, including a permanent magnet motor rotor, a fan device is arranged at each end of the stator core of the permanent magnet motor rotor, and the fan in the rotor forms a flowing wind during the rotation of the permanent magnet motor, and the heat of the internal parts of the permanent magnet motor is exchanged through the flowing wind, and the external independent air-cooling fan blows cold air to the permanent magnet motor, which can quickly dissipate the heat generated by the permanent magnet motor. The present invention places a fan device inside the permanent magnet motor, does not occupy external space, is conducive to the installation of the permanent magnet motor, and the motor maintains a relatively stable temperature during operation, so that the permanent magnet motor can work in a stable state, has a significant improvement in practical effect, and is worthy of promotion and use in the existing market.

[0004] The above device significantly increases the length of the generator, is not compact enough, and also increases the cost of the generator. The present invention makes full use of the internal space of the permanent magnet motor without increasing the length of the generator, and adds an integrated bent fan at both ends of the permanent magnet motor rotor core. When the permanent magnet motor is working, the fan can drive the air circulation inside the permanent magnet motor, and blow the hot air at the end of the motor stator winding to the permanent magnet motor casing for heat exchange, thereby enhancing the heat dissipation of the permanent magnet motor. The fan is formed by bending the steel plate after wire cutting, and has a low cost. Therefore, a new type of permanent magnet motor rotor structure with a fan is needed to improve the above device. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a permanent magnet motor rotor structure with a fan, which solves the problem that the prior device significantly increases the length of the generator, is not compact enough, and also increases the cost of the generator.

[0006] In order to achieve the purpose of adjusting the force, the present invention provides the following technical solutions: a permanent magnet motor rotor structure with a fan, comprising a front end cover, a shell is provided on one side of the front end cover, a stator winding is fixedly installed inside the shell, a rotor body is provided on one side of the stator winding, a fan mechanism is provided on one side of the rotor body, a rotor core is fixedly installed on one side of the fan mechanism, a rear end cover is movably connected to one side of the rotor core, and the front end cover, the shell, the rotor core and the rear end cover together form a closed cavity;

[0007] The fan mechanism includes a clamping ring, a fan body, a bending sheet and a bending line. The clamping ring is fixedly mounted on one side of the rotor body. The fan body is fixedly mounted on one side of the clamping ring. The fan body is an integrated bending-molded fan, which is made by cutting and bending a whole steel plate. The fan body is cut at the starting point of the bending line and cut at the end point of the bending line to form a bending sheet. The bending sheet is bent with the bending line as the center, and the bending angle is 45°. The fan body rotates under the drive of the rotor core, thereby driving the bending sheet to blow the hot air at the end of the motor stator winding to the permanent magnet motor housing for heat exchange, thereby enhancing the heat dissipation effect of the permanent magnet motor.

[0008] Furthermore, the fan mechanism also includes a second block, a first slot, a third block, a second slot, a positioning ring, a positioning slot, a positioning hole, a fairing, a third slot and a post. The second block is fixedly mounted on one side of the rotor core. The top of the second block is provided with a first slot. The top of the second block is provided with a third block. The top of the third block is provided with a second slot. A positioning ring is provided between the third block and the second block. The top of the positioning ring is provided with a positioning slot. The top of the positioning ring is provided with a positioning hole. The top of the positioning ring is fixedly mounted with a fairing. The inside of the fairing is provided with a third slot. The bottom of the fairing is fixedly mounted with a post. The positioning ring and the fan body are fixed to one side of the rotor body by directly pressing the fairing to drive the post. The parts provided with the grooves are isolated from the air by the fairing, thereby reducing the influence of wind resistance on the rotor core when the rotor body rotates at high speed.

[0009] Furthermore, the positioning ring is fixedly installed on the top of the fan body, the thickness of the positioning ring is the same as the distance between the third clamping block and the second clamping block, and the clamping column passes through the second clamping slot and enters the interior of the first clamping slot.

[0010] Furthermore, the thickness of the fan body is the same as the height of the retaining ring, and the portion of the bent sheet covering the ventilation hole inside the rotor body needs to be cut.

[0011] Furthermore, the shell includes a first clamping block, a ventilation groove, a sealing plate, a first guide plate and a curved groove, the first clamping block is fixedly installed inside the shell, the shell is provided with ventilation grooves inside, a sealing plate is fixedly connected to one side of the ventilation groove, a first guide plate is arranged inside the ventilation groove, and curved grooves are symmetrically provided on both sides of the ventilation groove.

[0012] Furthermore, the shell also includes a second guide plate, a first diverter plate, a second diverter plate, an exchange cavity and a heat dissipation cavity. The second guide plate is arranged inside the ventilation slot, a first diverter plate is arranged on one side of the second guide plate, and a second diverter plate is arranged on one side of the first diverter plate. The second guide plate and the first guide plate divide the interior of the ventilation slot into an exchange cavity and a heat dissipation cavity.

[0013] Furthermore, the airflow inside the heat dissipation cavity is diverted multiple times through the first diverter plate and the second diverter plate, the flow rate of the airflow is lower than the flow rate inside the exchange cavity, and the second guide plate, the first diverter plate and the second diverter plate are all fixedly connected to the heat sink outside the shell.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When the present invention is in use, by setting a fan body, the fan on the permanent magnet motor rotor can drive the internal air circulation of the permanent magnet motor, blow the hot air at the end of the motor stator winding to the permanent magnet motor casing to quickly exchange heat, enhance the heat dissipation effect of the permanent magnet motor, and utilize the space between the front end cover and the rotor core without increasing the length of the permanent magnet motor. The fan is an integrated bent and molded fan and does not require mold opening. The size, shape and number of its blades can be adjusted and designed according to the change of the number of permanent magnet motor rotor poles and the size of the internal space, and the design flexibility is strong.

[0016] 2. When the present invention is in use, a first guide plate is provided, a ventilation slot is provided between the outer shell and the stator winding, and two channels with different air flow rates are separated inside the ventilation slot by the first guide plate, the second guide plate, the first diverter plate and the second diverter plate, wherein the interior of the heat dissipation cavity adopts the fastest curve to open a curved slot to speed up the air circulation efficiency, and the interior of the exchange cavity increases the hot air flow through the first diverter plate and the second diverter plate to improve the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the rotor main structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the appearance structure of the motor of the present invention;

[0020] Figure 3 It is a schematic diagram of the main structure of the fan mechanism of the present invention;

[0021] Figure 4 It is a schematic diagram of the fan body structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the local structure of the fan body of the present invention;

[0023] Figure 6 It is a schematic diagram of the main structure of the buckle mechanism of the present invention.

[0024] Figure 7 It is a schematic diagram of the partial structure of the buckle mechanism of the present invention;

[0025] Figure 8 It is a schematic diagram of the main structure of the heat dissipation mechanism of the present invention;

[0026] Fig. 9 It is a schematic diagram of the local structure of the heat dissipation mechanism of the present invention;

[0027] Fig.10 It is a schematic diagram of the enlarged structure of the heat dissipation mechanism of the present invention.

[0028] In the figure: 1, front cover; 2, shell; 201, first clamping block; 202, ventilation slot; 203, sealing plate; 204, first guide plate; 205, curved slot; 206, second guide plate; 207, first splitter plate; 208, second splitter plate; 209, exchange cavity; 210, heat dissipation cavity; 3, stator winding; 4, rotor body; 5, fan mechanism; 501, clamping ring; 502, fan body; 503, bending sheet; 504, bending line; 505, second clamping block; 506, first clamping slot; 507, third clamping block; 508, second clamping slot; 509, positioning ring; 510, positioning slot; 511, positioning hole; 512, fairing; 513, third clamping slot; 514, clamping column; 6, rotor core; 7, rear cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 10The present invention provides a technical solution: a permanent magnet motor rotor structure with a fan, comprising a front end cover 1, a housing 2 is provided on one side of the front end cover 1, a stator winding 3 is fixedly installed inside the housing 2, a rotor body 4 is provided on one side of the stator winding 3, a fan mechanism 5 is provided on one side of the rotor body 4, a rotor core 6 is fixedly installed on one side of the fan mechanism 5, a rear end cover 7 is movably connected to one side of the rotor core 6, and the front end cover 1, the housing 2, the rotor core 6 and the rear end cover 7 together form a closed cavity;

[0031] like Figures 3 to 7 As shown, the fan mechanism 5 includes a retaining ring 501, a fan body 502, a bending piece 503 and a bending line 504. The retaining ring 501 is fixedly mounted on one side of the rotor body 4. The fan body 502 is fixedly mounted on one side of the retaining ring 501. The fan body 502 is an integral bent-molded fan, which is made by cutting and bending a whole piece of steel plate. The fan body 502 is linearly cut at the starting point of the bending line 504 and the cutting ends at the end point of the bending line 504 to form the bending piece 503. The bending piece 503 is bent with the bending line 504 as the center, and the bending angle is 45°.

[0032] The fan mechanism 5 further includes a second clamping block 505, a first clamping slot 506, a third clamping block 507, a second clamping slot 508, a positioning ring 509, a positioning slot 510, a positioning hole 511, a fairing 512, a third clamping slot 513 and a clamping column 514. The second clamping block 505 is fixedly mounted on one side of the rotor core 6. The first clamping slot 506 is provided on the top of the second clamping block 505. The third clamping block 507 is provided on the top of the second clamping block 505. The second clamping slot 508 is provided through the top of the third clamping block 507. A positioning ring 509 is provided between the third clamping block 507 and the second clamping block 505. The positioning slot 510 is provided through the top of the positioning ring 509. The positioning hole 511 is provided through the top of the positioning ring 509. The fairing 512 is fixedly mounted on the top of the positioning ring 509. The third clamping slot 513 is provided inside the fairing 512. The clamping column 514 is fixedly mounted on the bottom of the fairing 512.

[0033] The positioning ring 509 is fixedly mounted on the top of the fan body 502 . The thickness of the positioning ring 509 is the same as the distance between the third clamping block 507 and the second clamping block 505 . The clamping column 514 penetrates the second clamping slot 508 and enters the interior of the first clamping slot 506 .

[0034] The thickness of the fan body 502 is the same as the height of the clamping ring 501 , and the portion of the bent piece 503 covering the ventilation hole inside the rotor body 4 needs to be cut.

[0035] It needs to be further explained that the permanent magnet motor is composed of a front cover 1, a housing 2, a stator winding 3, a rotor body 4, a fan mechanism 5, a rotor core 6 and a rear cover 7. The front cover 1, the housing 2, the rotor core 6 and the rear cover 7 form a closed space inside the permanent magnet motor. When the motor is running, the fan body 502 on the rotor body 4 rotates to drive the air circulation inside the permanent magnet motor, and the heat generated by the stator winding 3, especially the heat at the end of the stator winding, is blown to the permanent magnet motor housing 2 for rapid heat exchange, thereby enhancing the heat dissipation effect of the permanent magnet motor. In particular, the fan body 502 on the rotor body 4 is an integrated bending-molded fan, and the size, shape and number of its blades can be adjusted and designed according to the change of the number of poles of the permanent magnet motor rotor and the size of the internal space, and the design flexibility is strong. And the fan is formed by bending after wire cutting of steel plate, and the cost is relatively low.

[0036] like Figures 8 to 10 As shown, the shell 2 includes a first clamping block 201, a ventilation slot 202, a sealing plate 203, a first guide plate 204 and a curved slot 205. The first clamping block 201 is fixedly installed inside the shell 2. The shell 2 is provided with ventilation slots 202 inside. A sealing plate 203 is fixedly connected to one side of the ventilation slot 202. A first guide plate 204 is provided inside the ventilation slot 202. Curved slots 205 are symmetrically provided on both sides of the ventilation slot 202.

[0037] The housing 2 also includes a second guide plate 206, a first diverter plate 207, a second diverter plate 208, an exchange cavity 209 and a heat dissipation cavity 210. The second guide plate 206 is arranged inside the ventilation slot 202. The first diverter plate 207 is arranged on one side of the second guide plate 206. The second diverter plate 208 is arranged on one side of the first diverter plate 207. The second guide plate 206 and the first guide plate 204 divide the interior of the ventilation slot 202 into an exchange cavity 209 and a heat dissipation cavity 210.

[0038] The airflow inside the heat dissipation cavity 210 is diverted multiple times through the first diverter plate 207 and the second diverter plate 208. The flow rate of the airflow is lower than the flow rate inside the exchange cavity 209. The second guide plate 206, the first diverter plate 207 and the second diverter plate 208 are all fixedly connected to the heat sink outside the shell 2.

[0039] It needs to be further explained that the interior of the ventilation slot 202 is divided into two channels, an exchange cavity 209 and a heat dissipation cavity 210, by a first guide plate 204, a second guide plate 206, a first diverter plate 207 and a second diverter plate 208. When the air inside the heat dissipation cavity 210 enters the heat dissipation cavity 210, it is guided and diverted multiple times by the first diverter plate 207 and the second diverter plate 208. The airflow travels through the heat dissipation cavity 210 much longer than the exchange cavity 209, thereby increasing the contact time between the hot air and the heat sink outside the housing 2 and increasing the heat dissipation efficiency. Since the exchange cavity 209 has less obstruction, the hot air flow quickly passes through the stator winding end under the rotation of the fan body 502 and enters the other end of the rotor body 4 to complete the heat exchange.

[0040] The working principle of the above embodiment is as follows: the permanent magnet motor is composed of a front cover 1, a housing 2, a stator winding 3, a rotor body 4, a fan mechanism 5, a rotor core 6 and a rear cover 7. The front cover 1, the housing 2, the rotor core 6 and the rear cover 7 form a closed space inside the permanent magnet motor. When the motor is running, the fan body 502 on the rotor body 4 rotates to drive the air circulation inside the permanent magnet motor, and the heat generated by the stator winding 3, especially the heat at the end of the stator winding, is blown to the permanent magnet motor housing 2 for rapid heat exchange, thereby enhancing the heat dissipation effect of the permanent magnet motor. In particular, the fan body 502 on the rotor body 4 is an integrated bending-molded fan, and the size, shape and number of its blades can be adjusted and designed according to the change of the number of poles of the permanent magnet motor rotor and the size of the internal space, and the design flexibility is strong. And the fan is formed by bending after wire cutting of steel plate, and the cost is relatively low.

[0041] Next, when installing the fan body 502, first align the fan body 502 with the second block 505 on one side of the rotor core 6 until the fan body 502 is flush with the retaining ring 501, and then align the positioning groove 510 on the positioning ring 509 with the second block 505 until the positioning ring 509 is located at the top of the fan body 502 and close to the fan body 502. At this time, manually rotate the positioning ring 509 until the positioning hole 511 coincides with the second slot 508. The positioning groove 510 on the positioning ring 509 is now away from the second block 505 and can no longer be directly removed. Finally, align the column 514 at the bottom of the fairing 512 with the second slot 508, the positioning hole 511 and the first slot 506 and insert it to complete the fixation of the fan body 502.

[0042] Finally, the interior of the ventilation slot 202 is divided into two channels, an exchange cavity 209 and a heat dissipation cavity 210, by a first guide plate 204, a second guide plate 206, a first diverter plate 207 and a second diverter plate 208. When the air inside the heat dissipation cavity 210 enters the heat dissipation cavity 210, it is guided and diverted multiple times by the first diverter plate 207 and the second diverter plate 208. The airflow travels through the heat dissipation cavity 210 much longer than the exchange cavity 209, thereby increasing the contact time between the hot air and the heat sink outside the housing 2 and increasing the heat dissipation efficiency. Since the exchange cavity 209 has less obstruction, the hot air flow quickly passes through the stator winding end under the rotation of the fan body 502 and enters the other end of the rotor body 4 to complete the heat exchange.

[0043] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A permanent magnet motor rotor structure with a fan, comprising a front end cover (1), characterized in that: A housing (2) is provided on one side of the front end cover (1), a stator winding (3) is fixedly installed inside the housing (2), a rotor body (4) is provided on one side of the stator winding (3), a fan mechanism (5) is provided on one side of the rotor body (4), a rotor core (6) is fixedly installed on one side of the fan mechanism (5), a rear end cover (7) is movably connected to one side of the rotor core (6), and the front end cover (1), the housing (2), the rotor core (6) and the rear end cover (7) together form a closed cavity; A fan mechanism (5), the fan mechanism (5) comprising a retaining ring (501), a fan body (502), a bending piece (503) and a bending line (504), the retaining ring (501) being fixedly mounted on one side of a rotor body (4), the fan body (502) being fixedly mounted on one side of the retaining ring (501), the fan body (502) being an integrally bent fan, and being manufactured by cutting and bending a whole piece of steel plate, the fan body (502) being wire cut at the starting point of the bending line (504), and being cut at the end point of the bending line (504) to form the bending piece (503), the bending piece (503) being bent with the bending line (504) as the center, and the bending angle being 45°.

2. The permanent magnet motor rotor structure with a fan according to claim 1, characterized in that: The fan mechanism (5) further comprises a second clamping block (505), a first clamping slot (506), a third clamping block (507), a second clamping slot (508), a positioning ring (509), a positioning slot (510), a positioning hole (511), a fairing (512), a third clamping slot (513) and a clamping column (514); the second clamping block (505) is fixedly mounted on one side of the rotor core (6); the first clamping slot (506) is provided on the top of the second clamping block (505); the third clamping block (507) is provided on the top of the second clamping block (505); the third clamping block (507) is provided on the top of the second clamping block (505); the third clamping block (507) is provided on the top of the second clamping block (505); the third clamping block (507) is provided on the top of the second clamping block (505); the third clamping block (507) is provided on the top of the second clamping block (505); the third clamping block (507) is provided on the top of the second clamping block (505); the third clamping block (507) is provided on the top of the second clamping block (505); the third clamping block (514) is provided on the top of the second clamping block (505); the third clamping block (514) is provided on the top of the second clamping block (505); the third clamping block (513 ... A second slot (508) is provided through the top of the block (507); a positioning ring (509) is provided between the third block (507) and the second block (505); a positioning slot (510) is provided through the top of the positioning ring (509); a positioning hole (511) is provided through the top of the positioning ring (509); a fairing (512) is fixedly installed on the top of the positioning ring (509); a third slot (513) is provided inside the fairing (512); and a clamping column (514) is fixedly installed on the bottom of the fairing (512).

3. A permanent magnet motor rotor structure with a fan according to claim 2, characterized in that: The positioning ring (509) is fixedly mounted on the top of the fan body (502); the thickness of the positioning ring (509) is the same as the spacing between the third clamping block (507) and the second clamping block (505); and the clamping column (514) passes through the second clamping slot (508) and enters the interior of the first clamping slot (506).

4. The permanent magnet motor rotor structure with a fan according to claim 1, characterized in that: The thickness of the fan body (502) is the same as the height of the clamping ring (501), and the portion of the bent sheet (503) covering the ventilation hole inside the rotor body (4) needs to be cut.

5. The permanent magnet motor rotor structure with a fan according to claim 1, characterized in that: The housing (2) comprises a first clamping block (201), a ventilation slot (202), a sealing plate (203), a first guide plate (204) and a curved slot (205); the first clamping block (201) is fixedly mounted inside the housing (2); the housing (2) is provided with a ventilation slot (202); one side of the ventilation slot (202) is fixedly connected with the sealing plate (203); the interior of the ventilation slot (202) is provided with a first guide plate (204); and curved slots (205) are symmetrically provided on both sides of the ventilation slot (202).

6. The permanent magnet motor rotor structure with a fan according to claim 1, characterized in that: The housing (2) further comprises a second guide plate (206), a first diverter plate (207), a second diverter plate (208), an exchange cavity (209) and a heat dissipation cavity (210); the second guide plate (206) is arranged inside the ventilation slot (202); the first diverter plate (207) is arranged on one side of the second guide plate (206); the second diverter plate (208) is arranged on one side of the first diverter plate (207); the second guide plate (206) and the first guide plate (204) divide the interior of the ventilation slot (202) into an exchange cavity (209) and a heat dissipation cavity (210).

7. A permanent magnet motor rotor structure with a fan according to claim 6, characterized in that: The airflow inside the heat dissipation cavity (210) is divided multiple times by the first diverter plate (207) and the second diverter plate (208), the flow rate of the airflow is lower than the flow rate inside the exchange cavity (209), and the second guide plate (206), the first diverter plate (207) and the second diverter plate (208) are all fixedly connected to the heat sink outside the housing (2).

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