CN210431087U - Small-size shielded integrated permanent magnet brushless direct current motor - Google Patents
Small-size shielded integrated permanent magnet brushless direct current motor Download PDFInfo
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- CN210431087U CN210431087U CN201921559526.8U CN201921559526U CN210431087U CN 210431087 U CN210431087 U CN 210431087U CN 201921559526 U CN201921559526 U CN 201921559526U CN 210431087 U CN210431087 U CN 210431087U
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Abstract
The utility model discloses a small-sized shielding type integrated permanent magnet brushless direct current motor, which comprises a stator, a shielding sleeve, a rotor, a shell, a position sensor and a controller, wherein the stator is installed and fixed inside the shell in an interference fit way; the shielding sleeve is of a cylindrical structure, one end of the shielding sleeve is open and used for mounting the flange plate, the other end of the shielding sleeve is closed, the middle of the shielding sleeve is of a thin-wall structure, the shielding sleeve is integrally mounted inside the stator to shield and isolate the stator, and a cavity is formed inside the shielding sleeve. The utility model discloses a brushless DC motor of small-size shielded integration permanent magnetism adopts the quiet seal structure of shielded to replace complicated dynamic seal structure to realize the drive control integrated design, its simple structure, small, reliability, security are high, and the operation maintenance cost is low.
Description
Technical Field
The utility model belongs to the technical field of permanent magnet brushless DC motor, concretely relates to small-size shielded integration permanent magnet brushless DC motor.
Background
The permanent magnet brushless DC motor is an electromechanical capacity conversion device which adopts permanent magnet excitation and electronic commutation to replace mechanical commutation. The direct current motor has the advantages of simple structure, reliable operation, convenient maintenance, long operation life and the like, has good speed regulation performance, flexible and changeable control method, high efficiency, large starting torque, strong overload capacity, no reversing spark, no radio interference, no excitation loss and the like, is in line with the pursuit of industry upgrading on weight reduction, reliability improvement, performance improvement or life cost reduction, and is mature in application in various fields, such as aviation, aerospace, biology, medicine, food, chemical industry and the like.
In some fields, the permanent magnet brushless dc motor is used as a driving part of a delivery pump, and some liquid media to be transmitted have strong corrosivity, are flammable and explosive, or require high cleanliness so as not to be polluted, which requires that the permanent magnet brushless dc motor for driving the pump should be isolated from the liquid media. Generally, the motor output and the pump body are sealed in a dynamic sealing mode, the matching precision of the motor and the pump body is high due to the mode, meanwhile, the sealing body rotates at a high speed to generate friction and abrasion, the service life of the sealing body is short, liquid leakage is easy to cause, and therefore the sealing body needs to be replaced and maintained regularly, the reliability and the safety of a product are reduced, and the operation cost is increased. In addition, the dynamic seal causes high operation noise, and the motor is isolated from the liquid medium, so that the liquid cooling cannot be conveniently carried out, and the operation efficiency is low.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a small-size shielded integration permanent magnetism brushless DC motor.
The technical scheme of the utility model is that:
a small-sized shielding type integrated permanent magnet brushless direct current motor comprises a stator, a shielding sleeve, a rotor, a shell, a position sensor and a controller, wherein the stator is installed and fixed in the shell in an interference fit mode; the shielding sleeve is of a cylindrical structure, one end of the shielding sleeve is open and used for mounting a flange plate, the other end of the shielding sleeve is closed, the middle of the shielding sleeve is of a thin-wall structure, the shielding sleeve is integrally mounted inside the stator to shield and isolate the stator, and a cavity is formed inside the shielding sleeve; the rotor is integrally arranged in a cavity inside the shielding sleeve, and both ends of the rotor are respectively provided with a first all-ceramic bearing and a second all-ceramic bearing which are used for supporting the rotor and providing rotational freedom; the shell is arranged outside the stator to provide protection and an assembly reference for the stator; the position sensor is arranged at one end of the shell; the controller is arranged at the tail end of the shell and is designed into an integrated structure with the controller; and a through hole is further processed in the center of the rotor, and a liquid circulation channel is formed together with a cavity between the rotor and the shielding sleeve and a cavity at the tail end of the shielding sleeve.
The stator comprises an iron core and a three-phase winding, wherein a plurality of tooth sockets are uniformly distributed on the iron core along the circumferential direction, and the direction of the tooth sockets is consistent with the axis of the stator; the three-phase winding is embedded in the tooth socket of the iron core and is sealed and protected by epoxy pouring sealant.
The iron core on the stator is of a straight slot structure, and the three-phase winding is conveniently embedded in the tooth slot of the iron core.
The rotor comprises a rotating shaft, a first end ring, magnetic steel, a rotor iron core, a sheath, sensor magnetic steel and a second end ring, wherein the rotor iron core is sleeved on the rotating shaft, the magnetic steel is bonded on the outer circumferential surface of the rotor iron core, the sensor magnetic steel is bonded at one end of the rotor, and the sheath is sleeved outside the rotor; the outer circumferential surface of the rotor is welded and sealed by a sheath and end rings at both ends thereof.
The protective sleeve of the rotor and the end rings at two ends of the protective sleeve are made of stainless steel or titanium alloy, and are welded and sealed by argon arc welding.
And the magnetic steel on the rotor is bonded and assembled in a segmented oblique pole mode.
And the full ceramic bearing assembled by the rotor adopts a full ceramic deep groove ball bearing or a full ceramic full ball bearing.
The shielding sleeve is made of stainless steel or titanium alloy.
The three-phase winding and the position sensor of the stator are electrically connected with the controller by adopting an installation wire, the position sensor adopts a Hall device, and the position of the rotor is judged by the polarity change of the magnetic steel surface of the sensitive sensor and is provided for a corresponding position signal of the controller; the controller adopts a star-shaped three-phase six-state working mode to drive the motor body to rotate at a high speed.
Adopt the technical scheme of the utility model, following beneficial effect has:
(1) the stator shielding sleeve design is adopted to separate the motor stator from the rotor, so that the sealing performance of the stator is higher, the rotor can be directly connected with the pump body, the traditional complex dynamic sealing structure is omitted, the risk of liquid medium leakage is greatly reduced, the stability and reliability of the motor operation are improved, and the operation and maintenance cost is reduced;
(2) the rotor adopts an integrally closed structural design, the sheath and the end ring are made of stainless steel or titanium alloy, the sheath and the end ring are welded and sealed by argon arc welding, and the bearing adopts a ceramic deep groove ball bearing or a ceramic full ball bearing, so that the rotor can be normally immersed in a liquid medium with high requirements on corrosivity, high toxicity or cleanliness and high purity, and has high applicability in the fields of aviation, aerospace, biology, medicine, food, chemical engineering and the like;
(3) the motor rotor is wholly immersed in a liquid medium, and the adopted ceramic ball bearing has an excellent self-lubricating function, so that the motor has low operation noise and prolonged service life;
(4) by adopting a reasonable circulation channel design, the liquid medium forms a circulation flow in the motor, the heat dissipation capacity of the motor stator, the motor rotor and the controller is improved, and the environment adaptability of the motor is enhanced;
(5) the controller is installed at motor casing rear end, forms the integrated design with motor body, further reduces the holistic volume of motor and weight.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the rotor structure of the present invention.
The attached drawings are marked as follows:
1-a stator; 2, a shielding sleeve; 3, a rotor; 4, a shell; 5-a position sensor; 6, a controller; 7-a full ceramic bearing I; 8, a rotating shaft; 9-end ring one; 10-magnetic steel; 11-rotor core; 12-a sheath; 13-position sensor magnet steel; 14-end ring two; 15-full ceramic bearing two.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the utility model provides a small-sized shielded integrated permanent magnet brushless dc motor, which comprises a stator 1, a shielding sleeve 2, a rotor 3, a housing 4, a position sensor 5 and a controller 6, wherein the stator 1 is fixed inside the housing 4 in an interference fit manner; the shielding sleeve 2 is of a cylindrical structure, one end of the shielding sleeve is open and used for mounting a flange plate, the other end of the shielding sleeve is closed, the middle of the shielding sleeve is of a thin-wall structure, the shielding sleeve 2 is integrally mounted inside the stator 1 to shield and isolate the stator 1, and a cavity is formed inside the shielding sleeve; the rotor 3 is integrally arranged in a cavity in the shielding sleeve 2, and a first all-ceramic bearing 7 and a second all-ceramic bearing 15 are respectively arranged at two ends of the rotor and are used for supporting the rotor 3 and providing rotational freedom; the housing 4 is arranged outside the stator 1 to provide protection and assembly reference for the stator; the position sensor 5 is arranged at one end of the shell 4; the controller 6 is arranged at the tail end of the shell 4 and is designed with the controller 6 in an integrated structure; and a through hole is further processed in the center of the rotor 3, and a liquid circulation channel is formed together with a cavity between the rotor 3 and the shielding sleeve 2 and a cavity at the tail end of the shielding sleeve 2.
The stator 1 comprises an iron core and a three-phase winding, wherein a plurality of tooth sockets are uniformly distributed on the iron core along the circumferential direction, and the direction of the tooth sockets is consistent with the axis of the stator; the three-phase winding is embedded in the tooth socket of the iron core and is sealed and protected by epoxy pouring sealant.
The iron core on the stator 1 is of a straight slot structure, and a three-phase winding is conveniently embedded in an iron core tooth slot.
The rotor 3 comprises a rotating shaft 8, a first end ring 9, magnetic steel 10, a rotor core 11, a sheath 12, sensor magnetic steel 13 and a second end ring 14, the rotor core 11 is sleeved on the rotating shaft 8, the magnetic steel 10 is bonded on the outer circumferential surface of the rotor core 11, the sensor magnetic steel 13 is bonded at one end of the rotor, and the sheath 12 is sleeved outside the rotor; the outer circumferential surface of the rotor 3 is welded and sealed by a sheath 12 and an end ring one 9 and an end ring two 14 at both ends thereof.
The sheath 12 of the rotor 3, the first end ring 9 and the second end ring 14 at the two ends of the sheath are made of stainless steel or titanium alloy, and are welded and sealed by argon arc welding.
And the magnetic steel 10 on the rotor 3 is bonded and assembled in a segmented oblique pole mode.
And the first full-ceramic bearing 7 and the second full-ceramic bearing 15 which are assembled on the rotor 3 adopt full-ceramic deep groove ball bearings or full-ceramic full-ball bearings.
The shielding sleeve 2 is made of stainless steel or titanium alloy.
The three-phase winding of the stator 1 and the position sensor 5 are electrically connected with the controller 6 by adopting an installation wire, the position sensor 5 adopts a Hall device, and the position of the rotor is judged by the polarity change of the surface of the magnetic steel of the sensitive sensor and is provided for a corresponding position signal of the controller; the controller 6 drives the motor body to rotate at a high speed by adopting a star-shaped three-phase six-state working mode.
The utility model discloses the theory of operation does:
when the motor is used, the motor is matched and connected with the pump body through the shielding sleeve 2, the middle part of the motor is provided with the sealing ring to form static sealing, the liquid medium of the pump body flows into a cavity between the rotor 3 and the shielding sleeve 2 through the all-ceramic bearing 8, and the liquid medium cannot leak into the stator 1 and other parts of the motor due to the shielding and isolating effect of the shielding sleeve 2. Meanwhile, as the rotor 3 is also provided with the end rings 9 and 14 and the sheath 12 for sealing and isolating, the liquid medium can not invade into the rotor 3, thereby realizing the replacement of a complex dynamic sealing structure by simple and reliable static sealing, greatly reducing the risk of liquid medium leakage and ensuring that the motor can reliably operate for a long time.
When the motor is connected with the pump body and normally works, the rotor 3 drives the pump body to rotate, a part of liquid medium enters an inner cavity isolated by the shielding sleeve 2 from a gap of the front-end full ceramic bearing 8 under the action of pressure, liquid flows to the rear end of the motor through a gap between the shielding sleeve 2 and the rotor 3, the liquid flows into a central hole of the rotating shaft 7 on the rotor 3 through a gap of the rear-end full ceramic bearing 15 and the rear-end cavity and flows out of the motor through the central hole, so that a liquid circulation channel is formed inside the motor, the motor stator 1 can be timely taken away, and heat generated by power devices of the rotor 3 and the controller 6 during working is enabled to have stronger heat dissipation capability.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (9)
1. The utility model provides a brushless DC motor of small-size shielded integration permanent magnetism, includes stator (1), housing (2), rotor (3), casing (4), position sensor (5) and controller (6), its characterized in that: the stator (1) is fixedly arranged in the shell (4) in an interference fit mode; the shielding sleeve (2) is of a cylindrical structure, one end of the shielding sleeve is open and used for mounting a flange plate, the other end of the shielding sleeve is closed, the middle of the shielding sleeve is of a thin-wall structure, the shielding sleeve (2) is integrally mounted inside the stator (1) to shield and isolate the stator (1), and a cavity is formed inside the shielding sleeve; the rotor (3) is integrally arranged in a cavity inside the shielding sleeve (2), and a first full ceramic bearing (7) and a second full ceramic bearing (15) are respectively arranged at two ends of the rotor and are used for supporting the rotor (3) and providing rotational freedom; the shell (4) is arranged outside the stator (1) to provide protection and assembly reference for the stator; the position sensor (5) is arranged at one end of the shell (4); the controller (6) is arranged at the tail end of the shell (4) and is designed with an integrated structure; and a through hole is further processed in the center of the rotor (3), and a liquid circulation channel is formed together with a cavity between the rotor (3) and the shielding sleeve (2) and a cavity at the tail end of the shielding sleeve (2).
2. The small shielded integrated permanent magnet brushless dc motor according to claim 1, wherein: the stator (1) comprises an iron core and a three-phase winding, wherein a plurality of tooth sockets are uniformly distributed on the iron core along the circumferential direction, and the direction of the tooth sockets is consistent with the axis of the stator; the three-phase winding is embedded in the tooth socket of the iron core and is sealed and protected by epoxy pouring sealant.
3. The small shielded integrated permanent magnet brushless dc motor according to claim 2, wherein: the iron core on the stator (1) is of a straight slot structure, and the three-phase winding is conveniently embedded in the tooth slot of the iron core.
4. The small shielded integrated permanent magnet brushless dc motor according to claim 1, wherein: the rotor (3) comprises a rotating shaft (8), a first end ring (9), magnetic steel (10), a rotor iron core (11), a sheath (12), sensor magnetic steel (13) and a second end ring (14), wherein the rotor iron core (11) is sleeved on the rotating shaft (8), the magnetic steel (10) is bonded on the outer circumferential surface of the rotor iron core (11), the sensor magnetic steel (13) is bonded at one end of the rotor, and the sheath (12) is sleeved outside the rotor; the outer circumferential surface of the rotor (3) is welded and sealed by a sheath (12) and an end ring I (9) and an end ring II (14) at two ends of the sheath.
5. The small shielded integrated permanent magnet brushless dc motor according to claim 4, wherein: the protective sleeve (12) of the rotor (3) and the end ring I (9) and the end ring II (14) at the two ends of the protective sleeve are made of stainless steel or titanium alloy, and are welded and sealed by argon arc welding.
6. The small shielded integrated permanent magnet brushless dc motor according to claim 4, wherein: and the magnetic steel (10) on the rotor (3) is bonded and assembled in a segmented oblique pole mode.
7. The small shielded integrated permanent magnet brushless dc motor according to claim 1, wherein: and the full ceramic bearing I (7) and the full ceramic bearing II (15) which are assembled on the rotor (3) adopt full ceramic deep groove ball bearings or full ceramic full ball bearings.
8. The small shielded integrated permanent magnet brushless dc motor according to claim 1, wherein: the shielding sleeve (2) is made of stainless steel or titanium alloy.
9. The small shielded integrated permanent magnet brushless dc motor according to claim 2, wherein: the three-phase winding of the stator (1) and the position sensor (5) are electrically connected with the controller (6) by adopting an installation wire, the position sensor (5) adopts a Hall device, and the position of the rotor is judged by the polarity change of the magnetic steel surface of the sensitive sensor and is provided for a corresponding position signal of the controller; the controller (6) drives the motor body to rotate at a high speed by adopting a star-shaped three-phase six-state working mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921559526.8U CN210431087U (en) | 2019-09-18 | 2019-09-18 | Small-size shielded integrated permanent magnet brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921559526.8U CN210431087U (en) | 2019-09-18 | 2019-09-18 | Small-size shielded integrated permanent magnet brushless direct current motor |
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| Publication Number | Publication Date |
|---|---|
| CN210431087U true CN210431087U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921559526.8U Active CN210431087U (en) | 2019-09-18 | 2019-09-18 | Small-size shielded integrated permanent magnet brushless direct current motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112242759A (en) * | 2020-09-25 | 2021-01-19 | 兰州万里航空机电有限责任公司 | Insulating and anti-corrosion structure of immersed cooling liquid brushless direct current motor |
| CN117155026A (en) * | 2023-10-31 | 2023-12-01 | 上海核工程研究设计院股份有限公司 | High-temperature-resistant high-pressure-resistant permanent magnet synchronous shielding controllable motor and working method thereof |
-
2019
- 2019-09-18 CN CN201921559526.8U patent/CN210431087U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112242759A (en) * | 2020-09-25 | 2021-01-19 | 兰州万里航空机电有限责任公司 | Insulating and anti-corrosion structure of immersed cooling liquid brushless direct current motor |
| CN117155026A (en) * | 2023-10-31 | 2023-12-01 | 上海核工程研究设计院股份有限公司 | High-temperature-resistant high-pressure-resistant permanent magnet synchronous shielding controllable motor and working method thereof |
| CN117155026B (en) * | 2023-10-31 | 2024-01-26 | 上海核工程研究设计院股份有限公司 | High-temperature-resistant high-pressure-resistant permanent magnet synchronous shielding controllable motor and working method thereof |
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