CN114844265A - Novel petroleum underground high-temperature-resistant micro motor structure - Google Patents
Novel petroleum underground high-temperature-resistant micro motor structure Download PDFInfo
- Publication number
- CN114844265A CN114844265A CN202210780582.4A CN202210780582A CN114844265A CN 114844265 A CN114844265 A CN 114844265A CN 202210780582 A CN202210780582 A CN 202210780582A CN 114844265 A CN114844265 A CN 114844265A
- Authority
- CN
- China
- Prior art keywords
- rotor shaft
- rear end
- magnetic steel
- permanent magnet
- rotor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
Abstract
The invention relates to the technical field of micro motors, in particular to a novel petroleum underground high-temperature-resistant micro motor structure which comprises a motor shell, a stator assembly fixedly arranged on the inner wall of the motor shell, and a rotor assembly rotatably arranged in the motor shell, wherein the rear end of the motor shell is fixedly connected with a rear end cover, the rotor assembly comprises a rotor shaft in rotating fit with the rear end cover, a plurality of magnetic steels which are fixedly arranged on the side wall of the front end of the rotor shaft and are uniformly arranged at intervals in an annular shape, a magnetic steel protective sleeve sleeved on the inner side of the stator assembly and sleeved outside the magnetic steels, a permanent magnet fixedly arranged on the side wall of the rear end of the rotor shaft, and a permanent magnet protective sleeve sleeved outside the permanent magnet. According to the invention, the magnetic steel is embedded into the magnetic steel groove, and the magnetic steel protective sleeve is used for external protection, so that the magnetic steel is prevented from being easily loosened and dislocated when the rotor assembly rotates at a high speed, the overall structural stability of the rotor assembly is improved, the waveform distortion of the magnetic field of the rotor assembly is reduced, and the electromagnetic performance of the rotor assembly is more stable.
Description
Technical Field
The invention relates to the technical field of micro motors, in particular to a novel petroleum underground high-temperature-resistant micro motor structure.
Background
In the rotor structure of the conventional micro motor, the magnet is generally fixed on the surface of the rotating shaft in a sticking manner, and when the motor rotor rotates at a high speed, the magnet is easily loosened and dislocated on the rotor. In addition, when the magnet is pasted, redundant glue is easy to overflow to the outer surface of the magnet, and the performance of the motor is seriously influenced.
Disclosure of Invention
The invention aims to provide a novel petroleum underground high-temperature-resistant micro motor structure to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a novel petroleum underground high-temperature-resistant micro motor structure comprises a motor shell, a stator assembly fixedly arranged on the inner wall of the motor shell, and a rotor assembly rotatably arranged in the motor shell, wherein the rear end of the motor shell is fixedly connected with a rear end cover;
the motor shell is internally provided with a Hall element circuit board, the Hall element circuit board is fixedly connected with the rear end cover, a Hall element for detecting a permanent magnet is fixedly arranged on the front end face of the Hall element circuit board, and the Hall element is arranged outside the permanent magnet protective sleeve.
Optionally, the stator assembly includes a stator core fixedly sleeved on the inner wall of the motor casing, and a coil wound on the stator core.
Optionally, the rotor assembly further comprises two high temperature resistant bearings, and the rear end cover is fixedly connected with a bearing pressing plate;
two the high temperature resistant bearing is along the axial of rotor shaft and sets up around being, and the high temperature resistant bearing that is located the front end cup joints with the front end shell of motor casing, and the high temperature resistant bearing that is located the rear end runs through the rear end cap and with the preceding terminal surface butt of bearing clamp plate.
Optionally, the magnetic steel grooves are provided with two groups, the two groups of magnetic steel grooves are arranged in a front-back manner along the axial direction of the rotor shaft, the two groups of magnetic steel grooves are arranged in an annular staggered manner about the axis of the rotor shaft, and the glue overflow groove is located on one side of the two groups of magnetic steel grooves which are opposite to each other.
Optionally, the permanent magnet is provided with a plurality of permanent magnets, the plurality of permanent magnets are uniformly arranged at intervals in an annular shape on the axis of the rotor shaft, and the side wall of the rear end of the rotor shaft is provided with permanent magnet grooves matched with the permanent magnets.
Optionally, the number of the hall elements is three, and the three hall elements are distributed in an arc shape by taking the rotor shaft as an axis.
Compared with the prior art, the invention has the following beneficial effects:
1. the magnetic steel embedded magnetic steel rotor assembly is compact in structure and simple to install, magnetic steel is embedded into the magnetic steel groove, and external protection is performed through the magnetic steel protective sleeve, so that the phenomenon that the magnetic steel is easy to loosen and misplace when the rotor assembly rotates at a high speed is avoided, the overall structural stability of the rotor assembly is improved, the waveform distortion of a magnetic field of the rotor assembly is reduced, and the electromagnetic performance of the rotor assembly is more stable;
2. the overflow glue groove communicated with the magnetic steel groove is formed, when the magnetic steel is pasted in the magnetic steel groove, redundant glue can overflow into the overflow glue groove, the outer surface of the magnetic steel cannot be influenced, the operability and the production efficiency of the magnetic steel pasting process are improved, and the influence of the production and manufacturing process on the performance of the motor is reduced;
3. according to the invention, the Hall element circuit board is fixed on the rear end cover, a certain gap is left between the Hall element circuit board and the stator assembly, the rear end of the rotor shaft is separately provided with the permanent magnet for detecting signals, and the magnet protective sleeve is sleeved outside the permanent magnet, so that on one hand, the effect of blocking temperature transmission is achieved, the influence of temperature rise of the stator assembly on the Hall element in the working process is reduced, and the working sensitivity of the Hall element is ensured; on the other hand, the magnetic field interference blocking device plays a role in blocking magnetic field interference, and reduces the interference of magnetic field leakage of the stator assembly on the Hall element.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a full sectional view of the present invention;
FIG. 3 is a schematic structural view of a rotor assembly according to the present invention;
FIG. 4 is a schematic structural view of the rotor assembly of the present invention without the high temperature resistant bearing, the magnetic steel protective sleeve and the permanent magnet protective sleeve;
FIG. 5 is a schematic view of a rotor shaft according to the present invention;
fig. 6 is a schematic structural diagram of the rear end cover, the hall element circuit board, the hall element, the permanent magnet and the permanent magnet protective sleeve in the invention.
In the figure: 1. a motor housing; 2. a stator assembly; 201. a stator core; 202. a coil; 3. a rotor assembly; 301. a high temperature resistant bearing; 302. a rotor shaft; 303. a magnetic steel groove; 304. a glue overflow groove; 305. magnetic steel; 306. a magnetic steel protective sleeve; 307. a permanent magnet slot; 308. a permanent magnet; 309. a permanent magnet protective sleeve; 4. a rear end cap; 5. a Hall element circuit board; 6. a Hall element; 7. and bearing pressing plates.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): referring to fig. 1-6, the present invention provides a novel petroleum downhole high temperature resistant micro motor structure, which includes a motor casing 1, a stator assembly 2 fixedly disposed on an inner wall of the motor casing 1, and a rotor assembly 3 rotatably disposed in the motor casing 1. The motor casing 1 is made of 316L stainless steel, and the rear end of the motor casing 1 is connected with the rear end cover 4 through a screw fastener. Rotor assembly 3 includes rotor shaft 302 with 4 normal running fit of rear end cap, fixed a plurality of magnet steel 305 that inlays to locate on the lateral wall of rotor shaft 302 front end and be the even interval setting of annular, the cover is located 2 inboard and the cover of stator assembly and is located the outer magnet steel protective sheath 306 of a plurality of magnet steel 305, fixed permanent magnet 308 of inlaying on the lateral wall of rotor shaft 302 rear end to and the cover is located the outer permanent magnet protective sheath 309 of permanent magnet 308.
The front end side wall of the rotor shaft 302 is further provided with an overflow glue groove 304 communicated with the magnetic steel groove 303, when the magnetic steel 305 is adhered in the magnetic steel groove 303, redundant glue can overflow into the overflow glue groove 304, the outer surface of the magnetic steel 305 cannot be influenced, the operability and the production efficiency of the magnetic steel 305 adhering process are improved, and the influence of the production and manufacturing process on the motor performance is also reduced.
Be equipped with hall element circuit board 5 in the motor casing 1, hall element circuit board 5 and rear end cap 4 fixed connection, the fixed hall element 6 that is equipped with detection permanent magnet 308 on the preceding terminal surface of hall element circuit board 5, hall element 6 locates outside permanent magnet protective sheath 309. In the embodiment, the hall element circuit board 5 is fixed on the rear end cover 4, so that a certain gap is reserved between the hall element circuit board and the stator assembly 2, the rear end of the rotor shaft 302 is separately provided with the permanent magnet 308 for detecting signals, and the magnet protective sleeve 309 is sleeved outside the permanent magnet 308, so that on one hand, the effect of blocking temperature transmission is achieved, the influence of temperature rise of the stator assembly 2 on the hall element 6 in the working process is reduced, and the working sensitivity of the hall element 6 is ensured; on the other hand, the magnetic field interference blocking device plays a role in blocking magnetic field interference, and reduces the interference of magnetic field leakage of the stator assembly 2 on the Hall element 6.
On the basis of the above embodiments, the stator assembly 2 in this embodiment includes the stator core 201 fixedly sleeved on the inner wall of the motor casing 1, and the coil 202 wound on the stator core 201.
On the basis of the above embodiments, the rotor assembly 3 in this embodiment further includes two high temperature resistant bearings 301, and the high temperature resistant bearings 301 are high temperature resistant deep groove ball bearings, which are filled with high temperature resistant grease, and can resist temperature up to 200 ℃. The rear end cover 4 is fixedly connected with a bearing pressing plate 7. The bearing pressing plate 7 and the Hall element circuit board 5 are fixed through a bolt connecting pair. Two high temperature resistant bearings 301 are along the axial of rotor shaft 302 and are set up around being, and the high temperature resistant bearing 301 that is located the front end cup joints with the front end shell of motor casing 1, and the high temperature resistant bearing 301 that is located the rear end runs through rear end housing 4 and with the preceding terminal surface butt of bearing clamp plate 7.
On the basis of the above embodiments, in this embodiment, two sets of magnetic steel slots 303 are provided, the two sets of magnetic steel slots 303 are disposed front and back along the axial direction of the rotor shaft 302, the two sets of magnetic steel slots 303 are disposed in an annular staggered manner with respect to the axis of the rotor shaft 302, and the glue overflow slot 304 is located on the opposite side of the two sets of magnetic steel slots 303.
On the basis of the above embodiments, six permanent magnets 308 are provided in this embodiment, the six permanent magnets 308 are uniformly arranged at intervals in a ring shape on the axis of the rotor shaft 302, and the rear end side wall of the rotor shaft 302 is provided with permanent magnet grooves 307 adapted to the permanent magnets 308.
In addition to the above embodiments, in the present embodiment, three hall elements 6 are provided, and the three hall elements 6 are distributed in an arc shape with the rotor shaft 302 as an axis. Before the Hall element 6 is selected, the Hall element 6 is screened at 175 ℃, and the reliability of the Hall element 6 in working is ensured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a novel high temperature resistant micro motor structure in oil pit which characterized in that: the motor comprises a motor shell (1), a stator assembly (2) fixedly arranged on the inner wall of the motor shell (1), and a rotor assembly (3) rotatably arranged in the motor shell (1), wherein the rear end of the motor shell (1) is fixedly connected with a rear end cover (4), the rotor assembly (3) comprises a rotor shaft (302) which is in running fit with the rear end cover (4), a plurality of magnetic steels (305) which are fixedly arranged on the side wall of the front end of the rotor shaft (302) and are uniformly arranged at intervals in an annular shape, a magnetic steel protective sleeve (306) which is sleeved on the inner side of the stator assembly (2) and is sleeved outside the plurality of magnetic steels (305), a permanent magnet (308) fixedly arranged on the side wall of the rear end of the rotor shaft (302), and a permanent magnet protective sleeve (309) which is sleeved outside the permanent magnet (308);
the motor comprises a motor shell (1), a rotor shaft (302) and a Hall element circuit board (5) are arranged on the motor shell, a magnetic steel groove (303) matched with magnetic steel (305) is formed in the side wall of the front end of the rotor shaft (302), an adhesive overflow groove (304) communicated with the magnetic steel groove (303) is further formed in the side wall of the front end of the rotor shaft (302), the Hall element circuit board (5) is fixedly connected with a rear end cover (4), a Hall element (6) for detecting a permanent magnet (308) is fixedly arranged on the front end face of the Hall element circuit board (5), and the Hall element (6) is arranged outside a permanent magnet protective sleeve (309).
2. The novel petroleum underground high-temperature-resistant micro motor structure according to claim 1, is characterized in that: the stator assembly (2) comprises a stator core (201) fixedly sleeved on the inner wall of the motor shell (1) and a coil (202) wound on the stator core (201).
3. The novel petroleum underground high-temperature-resistant micro motor structure according to claim 1, is characterized in that: the rotor assembly (3) further comprises two high-temperature-resistant bearings (301), and the rear end cover (4) is fixedly connected with a bearing pressing plate (7);
two high temperature resistant bearing (301) are along the axial of rotor shaft (302) and are set up around being, and high temperature resistant bearing (301) that are located the front end cup joints with the front end shell of motor casing (1), and high temperature resistant bearing (301) that are located the rear end run through rear end cap (4) and with the preceding terminal surface butt of bearing clamp plate (7).
4. The novel petroleum underground high-temperature-resistant micro motor structure according to claim 1, is characterized in that: the magnetic steel grooves (303) are arranged in two groups, the magnetic steel grooves (303) are arranged in the front and back direction along the axial direction of the rotor shaft (302), the magnetic steel grooves (303) are arranged in an annular staggered mode relative to the axis of the rotor shaft (302), and the glue overflow grooves (304) are located on one sides of the magnetic steel grooves (303) which are back to back.
5. The novel petroleum underground high-temperature-resistant micro motor structure according to claim 1, is characterized in that: the permanent magnet (308) is provided with a plurality of permanent magnets (308), the permanent magnets (308) are uniformly arranged at intervals in an annular mode on the axis of the rotor shaft (302), and the side wall of the rear end of the rotor shaft (302) is provided with permanent magnet grooves (307) matched with the permanent magnets (308).
6. The novel petroleum underground high-temperature-resistant micro motor structure according to claim 1, is characterized in that: the number of the Hall elements (6) is three, and the three Hall elements (6) are distributed in an arc shape by taking the rotor shaft (302) as an axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210780582.4A CN114844265A (en) | 2022-07-05 | 2022-07-05 | Novel petroleum underground high-temperature-resistant micro motor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210780582.4A CN114844265A (en) | 2022-07-05 | 2022-07-05 | Novel petroleum underground high-temperature-resistant micro motor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114844265A true CN114844265A (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210780582.4A Pending CN114844265A (en) | 2022-07-05 | 2022-07-05 | Novel petroleum underground high-temperature-resistant micro motor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114844265A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602762A (en) * | 2015-10-15 | 2017-04-26 | 联合汽车电子有限公司 | Magnetic steel rotor and permanent magnet synchronous motor |
| CN208820562U (en) * | 2018-08-04 | 2019-05-03 | 温岭市东菱电机有限公司 | Heavy-duty car direction assist motor |
| CN208835865U (en) * | 2018-11-02 | 2019-05-07 | 深圳市龙德科技有限公司 | Brushless motor inner rotor core |
| CN110445273A (en) * | 2019-07-31 | 2019-11-12 | 珠海格力电器股份有限公司 | A kind of rotor assembly, motor and compressor |
| CN210578206U (en) * | 2019-09-30 | 2020-05-19 | 华中科技大学 | Totally-enclosed torque motor with magnetic gear reducer |
| CN210958102U (en) * | 2019-12-26 | 2020-07-07 | 江西迈得机电配件有限公司 | Brushless motor rotor structure |
| CN113300519A (en) * | 2021-05-17 | 2021-08-24 | 安徽威灵汽车部件有限公司 | Insulating skeleton, stator, motor, compressor and vehicle |
| CN114552839A (en) * | 2022-01-27 | 2022-05-27 | 东阳市联宜机电有限公司 | High-performance brushless motor |
| CN217063416U (en) * | 2021-12-22 | 2022-07-26 | 深圳绿威科技有限公司 | Brushless motor and electric tool |
-
2022
- 2022-07-05 CN CN202210780582.4A patent/CN114844265A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602762A (en) * | 2015-10-15 | 2017-04-26 | 联合汽车电子有限公司 | Magnetic steel rotor and permanent magnet synchronous motor |
| CN208820562U (en) * | 2018-08-04 | 2019-05-03 | 温岭市东菱电机有限公司 | Heavy-duty car direction assist motor |
| CN208835865U (en) * | 2018-11-02 | 2019-05-07 | 深圳市龙德科技有限公司 | Brushless motor inner rotor core |
| CN110445273A (en) * | 2019-07-31 | 2019-11-12 | 珠海格力电器股份有限公司 | A kind of rotor assembly, motor and compressor |
| CN210578206U (en) * | 2019-09-30 | 2020-05-19 | 华中科技大学 | Totally-enclosed torque motor with magnetic gear reducer |
| CN210958102U (en) * | 2019-12-26 | 2020-07-07 | 江西迈得机电配件有限公司 | Brushless motor rotor structure |
| CN113300519A (en) * | 2021-05-17 | 2021-08-24 | 安徽威灵汽车部件有限公司 | Insulating skeleton, stator, motor, compressor and vehicle |
| CN217063416U (en) * | 2021-12-22 | 2022-07-26 | 深圳绿威科技有限公司 | Brushless motor and electric tool |
| CN114552839A (en) * | 2022-01-27 | 2022-05-27 | 东阳市联宜机电有限公司 | High-performance brushless motor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220802 |
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| RJ01 | Rejection of invention patent application after publication |