CN210578206U - Totally-enclosed torque motor with magnetic gear reducer - Google Patents
Totally-enclosed torque motor with magnetic gear reducer Download PDFInfo
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- CN210578206U CN210578206U CN201921648766.5U CN201921648766U CN210578206U CN 210578206 U CN210578206 U CN 210578206U CN 201921648766 U CN201921648766 U CN 201921648766U CN 210578206 U CN210578206 U CN 210578206U
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Abstract
The utility model discloses a totally-enclosed torque motor with a magnetic gear reducer, which comprises a vernier motor, a magnetic gear reducer and a shell; the magnetic gear reducer comprises a rotor shaft rear side disc-shaped structure, a magnetic adjusting disc and a second-stage output rotor; the surface of a disk-shaped structure at the rear side of the rotor shaft is pasted with axial magnetizing permanent magnets, and the magnetizing directions of two adjacent permanent magnets are opposite; the magnetic regulating disc is tightly installed with the shell, the whole motor is divided into two chambers, the main body of the magnetic regulating disc is made of non-magnetic materials, and magnetic regulating iron cores distributed along the circumference are embedded in the middle of the magnetic regulating disc. The totally-enclosed torque motor provided by the utility model can achieve the purpose of isolating the magnetic gear reducer from the motor main body, thereby greatly realizing the requirement of motor sealing; meanwhile, the condition of rotor blocking of the vernier motor does not exist, the temperature performance is good, the service life of the motor is prolonged, the safe operation of the motor is ensured, the motor is suitable for working environments with severe external conditions, and the stable rotation of low speed and large torque is realized.
Description
Technical Field
The utility model belongs to the low-speed big torque motor field, more specifically relates to a take magnetic gear reducer's totally closed torque motor.
Background
With the development of oil fields, motors with high temperature resistance, high pressure resistance and good sealing performance are required in the exploitation of crude oil. Due to the slim nature of the well, the design size of the downhole motor should also be more slim. However, the existing high-temperature motor still adopts a driving scheme of a planetary gear speed reducing mechanism, and the scheme achieves the speed reducing purpose by means of meshing between gears, so that the problems of poor bearing capacity, poor reliability and the like exist.
The Chinese utility model discloses an electric oil-submersible screw pump unit and a reducer thereof (publication No. CN208890621U, published as 2019.05.21) discloses a magnetic gear reduction structure. The magnetic gear includes an inner rotor, an outer rotor, and a housing. The outer stator is provided with a plurality of magnetic conductive materials arranged at intervals along the circumferential direction, the outer shell comprises a plurality of shell permanent magnets arranged on the inner wall of the outer stator at intervals along the circumferential direction, the inner rotor comprises a plurality of inner permanent magnets arranged on the outer circumferential surface of the inner rotor at intervals along the circumferential direction, the number of the shell permanent magnets is larger than that of the inner permanent magnets, and the radial magnetizing directions of two adjacent shell permanent magnets and two adjacent inner permanent magnets are opposite.
The magnetic gear reducer is sequentially provided with the outer shell, the outer rotor and the inner rotor from outside to inside, when the inner rotor rotates, the inner layer air gap can generate a rotating magnetic field coupling through the modulation effect of the magnetic material on the outer rotor to drive the outer rotor to rotate, and the speed reduction function can be realized according to the set ratio of the number of pole pairs of the permanent magnet. The structure adopts non-contact transmission, reduces mechanical loss and heat loss.
However, this structure has drawbacks that are difficult to overcome by itself. Firstly, the structure still has a three-layer structure and two-layer gaps, the structure design is complex, and the permanent magnets and the iron cores are difficult to install due to the small diameters of the inner rotor, the outer rotor and the shell, and the installation quantity is small, so that the reduction transmission ratio in a higher range is difficult to achieve. Moreover, when the motor is in a static state, the permanent magnets on the outer shell and the inner rotor can generate radial acting force to influence the stress of the outer shell and the inner rotor, and the service life of the outer shell can be shortened due to the designed thinner outer shell; secondly, the motor does not have good leakproofness to the coexistent environment of gas-liquid-solid molecules in the pit to stifled commentaries on classics torque in the pit requires highly, and long-time unable start easily causes the condition that stifled commentaries on classics electric current is too big and leads to the high temperature to influence the motor life-span even burn out the motor.
SUMMERY OF THE UTILITY MODEL
To the defect of prior art, the utility model aims to provide a take magnetic gear reducer's totally closed torque motor aims at solving the problem that high temperature downhole motor output torque is little, the leakproofness is relatively poor and the high temperature performance is poor.
In order to achieve the purpose, the utility model provides a totally-enclosed torque motor with a magnetic gear reducer, which comprises a vernier motor, a magnetic gear reducer and a shell; the vernier motor comprises a rotor, a stator and an armature winding; the magnetic gear reducer comprises a rotor shaft rear side disc-shaped structure, a magnetic adjusting disc and a second-stage output rotor; the surface of a disk-shaped structure at the rear side of the rotor shaft is pasted with axial magnetizing permanent magnets, and the magnetizing directions of two adjacent permanent magnets are opposite; the magnetic regulating disc is tightly installed with the shell without any gap, and the interior of the whole motor is divided into two chambers only with magnetic coupling. In addition, the motor also comprises a rotor bearing, a disc-shaped structure bearing at the rear side of the rotor shaft and an output shaft bearing, wherein the output shaft bearing is used for supporting the rotating shaft of the motor so that the motor can rotate stably.
Further, the second-stage output rotor is provided with a disc-shaped structure and an output shaft; the surface of the disc-shaped structure of the second-stage output rotor is pasted with axial magnetizing permanent magnets, and the magnetizing directions of two adjacent permanent magnets are opposite.
Furthermore, the magnetic adjusting disk main body is made of a non-magnetic material, and magnetic adjusting iron cores distributed along the circumference are embedded in the middle of the magnetic adjusting disk main body.
Furthermore, the sum of the number m of stator slots of the vernier motor and the number n of pole pairs of the armature winding is equal to the number p of pole pairs of the surface-mounted permanent magnets of the rotor. The sum of the number j of the pole pairs of the permanent magnets pasted on the disc-shaped structure at the rear side of the rotor shaft and the number k of the pole pairs of the permanent magnets pasted on the disc-shaped structure of the second-stage output rotor is equal to the number of the adjusting magnet cores of the adjusting disc.
Through the utility model discloses above technical scheme who thinks, compare with prior art, can gain following beneficial effect:
1. the utility model provides a totally closed torque motor with magnetic gear reducer, because the magnetic disk divides the motor into two cavities, and there is no space to install, can reach the purpose that magnetic gear reducer and motor body are kept apart, have realized the sealed demand of motor greatly;
2. the motor provided by the utility model adopts a disc-shaped reducer structure, reduces the material consumption and greatly reduces the axial length; in addition, in a locked-rotor state, namely the locked-rotor state of the output shaft of the magnetic gear reducer, under the condition that the motor works normally, only magnetic coupling exists between the electrode and the reducer, and electric coupling and mechanical contact do not exist, so that the locked-rotor state of the vernier motor does not exist, the temperature performance is good, the service life of the motor is prolonged, the safe work of the motor is ensured, and the device is suitable for working environments with severe external conditions;
3. the utility model provides a take magnetic gear reducer's totally closed torque motor contains vernier motor and magnetic gear reducer, and vernier motor produces the big torque of low-speed, and magnetic gear reducer slows down to increase torque, make the torque of final output have lower rotational speed and higher torque.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of a totally-enclosed torque motor with a magnetic gear reducer provided by the utility model;
FIG. 2 is a global view of the totally enclosed torque motor with magnetic gear reducer provided by the present invention;
FIG. 3 is a longitudinal middle slope view of the totally enclosed torque motor with the magnetic gear reducer provided by the present invention;
fig. 4 is a side view of the totally enclosed torque motor with a magnetic gear reducer provided by the present invention;
the attached drawings are marked as follows:
1. the shell, 2, the stator, 3, rotor shaft table pastes the permanent magnet, 4, the accent magnetic disk, 5, second grade output rotor disc structure, 6, rotor shaft rear side disc structure table pastes the permanent magnet, 7, the accent magnetic core, 8, second grade output rotor disc structure table pastes the permanent magnet, 9, the rotor shaft, 10, second grade output rotor shaft, 11, rotor shaft rear side disc structure department bearing, 12, the back lid, 13, flange joint, 14, the rotor bearing, 15, rotor shaft rear side disc structure, 16, the output shaft bearing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a totally-enclosed torque motor with a magnetic gear reducer, which comprises a vernier motor, a magnetic gear reducer and a shell 1 as shown in different views of figures 1 to 4; the vernier motor comprises a rotor, a stator 2 and an armature winding, wherein a permanent magnet 3 is attached to the surface of a rotor shaft; the magnetic gear reducer comprises a rotor shaft rear side disc-shaped structure 15, a magnetic adjusting disc 4 and a second-stage output rotor; the surface of a disk-shaped structure 15 at the rear side of the rotor shaft is pasted with axial magnetizing permanent magnets 6, and the magnetizing directions of two adjacent permanent magnets are opposite; the magnetic regulating disc 4 is tightly installed with the shell without any gap, and the inside of the whole motor is divided into two chambers only with magnetic coupling. In addition, the motor also comprises a rotor bearing 14, a disk-shaped structure bearing 11 at the rear side of the rotor shaft and an output shaft bearing 16, wherein the rotor bearing is used for supporting the rotating shaft of the motor so as to enable the motor to rotate stably.
Further, the second stage output rotor has a disk-like structure 5 and an output shaft; the surface of the second-stage output rotor disc-shaped structure 5 is pasted with axial magnetizing permanent magnets 8, and the magnetizing directions of two adjacent permanent magnets are opposite.
Furthermore, the main body of the magnetic adjusting disk 4 is made of a non-magnetic material, and magnetic adjusting iron cores 7 distributed along the circumference are embedded in the middle of the magnetic adjusting disk.
Furthermore, the sum of the number m of stator slots of the vernier motor and the number n of pole pairs of the armature winding is equal to the number p of pole pairs of the surface-mounted permanent magnets of the rotor. The sum of the number j of the pole pairs of the permanent magnets pasted on the disc-shaped structure at the rear side of the rotor shaft and the number k of the pole pairs of the permanent magnets pasted on the disc-shaped structure of the second-stage output rotor is equal to the number of the adjusting magnet cores of the adjusting disc. In this embodiment, the magnetic gear accelerator includes a 6-slot 10-pole vernier motor, a rotor shaft with a number of pole pairs of permanent magnets attached thereto, a second-stage output rotor with a number of pole pairs of permanent magnets attached thereto, and a number of magnetic cores of a magnetic disk of 2, 6, and 8.
The diameter of the shell of the motor is 25mm, and the total length of the motor and the speed reducer is 90 mm. Wherein the axial length of the vernier motor is 65mm, and the magnetic gear reducer is 25 mm.
Three-phase alternating current is conducted to the motor main body part, and the number of pole pairs of the armature coils is 1. The rotating magnetic flux generated by the three-phase alternating current acts on the air gap, the rotating magnetic flux is generated at the rotor part, further, rotating torque is generated, the rotating torque acts on the patch permanent magnet on the rotor shaft, the inner rotor with a certain rotating speed is generated, the generation of first-stage torque is realized, and the torque has higher rotating speed and higher torque. When the rotor rear side disc-shaped structure connected with the rotor shaft transmits the rotating rotor transmission torque generated by the first stage to the magnetic gear reducer, a rotating magnetic field is generated on the rear side due to the structure that the surface-mounted permanent magnets are distributed along the circumference, and the number of the harmonic pole pairs of the rotation of the magnetic field is 2. The harmonic wave acts on a magnetic disc with the number of the magnetic cores of 8 modulation magnets, and through modulation of the magnetic disc, a rotating magnetic field with the number of harmonic wave pole pairs of 6 and permanent magnets with the number of harmonic wave pole pairs of 6 attached to the surface of the disk-shaped structure connected with the second-stage output rotor are generated, so that the maximum torque and the minimum rotating speed under the condition are generated. And a corresponding rotating torque is generated to act on the permanent magnet of the outer rotor to generate rotation. The speed reducer realizes that the transformation ratio is 3: a reduction ratio of 1. The torque has the characteristics of low rotating speed and high torque. In addition, the number of pole pairs of the magnetic iron core on the adjusting magnetic disc and the number of pole pairs of the permanent magnets pasted on the disc-shaped structures on the two sides are changed, and the reduction ratio can be adjusted at will.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A totally-enclosed torque motor with a magnetic gear reducer is characterized by comprising a vernier motor, a magnetic gear reducer and a shell; the magnetic gear reducer comprises a rotor shaft rear side disc-shaped structure, a magnetic adjusting disc and a second-stage output rotor; the surface of the disk-shaped structure at the rear side of the rotor shaft is pasted with axial magnetizing permanent magnets, and the magnetizing directions of two adjacent permanent magnets are opposite; the magnetic adjusting disc is tightly installed with the shell to divide the whole motor into two chambers.
2. The fully enclosed torque motor of claim 1, wherein said second stage output rotor has a disc-like configuration with an output shaft; the surface of the disc-shaped structure of the second-stage output rotor is pasted with axial magnetizing permanent magnets, and the magnetizing directions of two adjacent permanent magnets are opposite.
3. The totally enclosed torque motor according to claim 1, wherein the disc adjusting body is made of a non-magnetic conductive material, and a circumferentially distributed magnetic adjusting core is embedded in the middle.
4. The totally-enclosed torque motor according to claim 1, further comprising a rotor bearing, a disc-shaped structure bearing at the rear side of the rotor shaft, and an output shaft bearing for supporting the motor shaft to enable the motor to rotate smoothly.
5. The totally enclosed torque motor according to claim 1, wherein the vernier motor comprises a rotor, a stator and an armature winding; the surface of the rotor is pasted with a permanent magnet.
6. The totally enclosed torque motor according to claim 5, wherein the sum of the number m of stator slots of the stator and the number n of pole pairs of the armature winding is equal to the number p of pole pairs of the rotor surface-mounted permanent magnets.
7. The totally-enclosed torque motor according to claim 2, wherein the sum of the number j of pole pairs of the permanent magnets attached to the disc-shaped structure at the rear side of the rotor shaft and the number k of pole pairs of the permanent magnets attached to the disc-shaped structure of the second-stage output rotor is equal to the number of the adjusting magnet cores of the adjusting disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921648766.5U CN210578206U (en) | 2019-09-30 | 2019-09-30 | Totally-enclosed torque motor with magnetic gear reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921648766.5U CN210578206U (en) | 2019-09-30 | 2019-09-30 | Totally-enclosed torque motor with magnetic gear reducer |
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| Publication Number | Publication Date |
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| CN210578206U true CN210578206U (en) | 2020-05-19 |
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| CN201921648766.5U Active CN210578206U (en) | 2019-09-30 | 2019-09-30 | Totally-enclosed torque motor with magnetic gear reducer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110557002A (en) * | 2019-09-30 | 2019-12-10 | 华中科技大学 | Totally-enclosed torque motor with magnetic gear reducer |
| CN114844265A (en) * | 2022-07-05 | 2022-08-02 | 合力（天津）能源科技股份有限公司 | Novel petroleum underground high-temperature-resistant micro motor structure |
-
2019
- 2019-09-30 CN CN201921648766.5U patent/CN210578206U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110557002A (en) * | 2019-09-30 | 2019-12-10 | 华中科技大学 | Totally-enclosed torque motor with magnetic gear reducer |
| CN114844265A (en) * | 2022-07-05 | 2022-08-02 | 合力（天津）能源科技股份有限公司 | Novel petroleum underground high-temperature-resistant micro motor structure |
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