CN111525761A - Permanent magnet motor capable of being maintained on site - Google Patents
Permanent magnet motor capable of being maintained on site Download PDFInfo
- Publication number
- CN111525761A CN111525761A CN202010319308.8A CN202010319308A CN111525761A CN 111525761 A CN111525761 A CN 111525761A CN 202010319308 A CN202010319308 A CN 202010319308A CN 111525761 A CN111525761 A CN 111525761A
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- China
- Prior art keywords
- permanent magnet
- stator
- support
- rotating shaft
- site
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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.)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
- H02K15/165—Balancing the rotor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a permanent magnet motor capable of being maintained on site, which comprises a stator, a rotor and an end cover fixed at the front end of the stator, wherein a rotating shaft is led out of the rotor, a bearing for supporting the rotating shaft is arranged on the end cover, a plurality of mounting holes are uniformly arranged on the stator along the circumference, a supporting piece with adjustable length is arranged on each mounting hole through a fixed support, the supporting piece points to the rotating shaft along the radius direction of the stator, an air bag is arranged between the supporting piece and the rotating shaft, and the tail end of the supporting piece is provided with a pressure sensor; the air bag around the rotating shaft is inflated, the pressure value is detected by the pressure sensor, the radial pressure value applied to the rotating shaft is balanced, the motor is maintained on site by replacing the end cover and the bearing, the problem of attraction of the stator and the rotor can be effectively solved, the possibility of site maintenance is realized, and the permanent magnet motor has the characteristics of accurate positioning, convenience in operation, high reliability, convenience in maintenance and the like, and is particularly suitable for large permanent magnet motors which have high requirements on high performance and reliability and need to be maintained on site.
Description
Technical Field
The invention belongs to the field of permanent magnet motors, and particularly relates to a large permanent magnet motor capable of being maintained on site, which is particularly suitable for ship propulsion, industrial and mining enterprises and other occasions.
Background
With the progress of the technology, the permanent magnet motor is already applied to the fields of high-end ship propulsion and large industrial and mining enterprises, the motor of the type has the advantages of compact structure, small size, light weight, simple and reliable structure, high efficiency and the like, and meanwhile, the efficiency of the motor can be greatly improved, and the economical efficiency of operation is improved.
For the application of the conventional permanent magnet motor, the assembly and maintenance of the permanent magnet motor are a key technology and directly relate to the performance of the permanent magnet motor. In the assembly process of the conventional motor, the stator and the rotor are not magnetic before being electrified, so that the problem of attraction together can not occur, and when the permanent magnet motor is not electrified, the stator and the rotor can be attracted together due to the existence of a magnetic field, so that the assembly failure is caused, and even the motor is damaged. Meanwhile, the assembly and order of the permanent magnet motor are difficult problems in the field, and the wide application of the permanent magnet motor is severely restricted.
At present, the permanent magnet motor is maintained by dragging the motor back to the factory and maintaining the motor by combining the motors together, so that great problems are brought to the maintenance cost and the maintenance period, and great cost is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the permanent magnet motor which is simple in structure, high in reliability and convenient to maintain.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a but permanent-magnet machine of field maintenance, includes stator, rotor and fixes the end cover at the stator front end, the rotor draw forth the pivot, the end cover on be provided with the bearing that supports the pivot, the stator on evenly be provided with a plurality of mounting holes along the circumference, the mounting hole on install length adjustable support piece through fixing support, support piece along the directional pivot of stator radius direction, be provided with the gasbag between support piece and the pivot, the support piece end is provided with pressure sensor.
The air bags of the permanent magnet motor capable of being maintained on site are a plurality of independent air bags corresponding to the supporting piece or an integral air bag surrounding the rotating shaft.
The support piece of the permanent magnet motor capable of being maintained on site is an adjusting screw rod screwed on the fixed support through threads or a hydraulic cylinder directly fixed on the fixed support.
The support piece of the permanent magnet motor capable of being maintained on site is an adjusting screw rod screwed on the fixed support through threads and hydraulic cylinders respectively fixed on the adjusting screw rod.
The number of the adjusting screw rods can be three or more than three in the circumferential direction.
The invention has the beneficial effects that: the air bag around the rotating shaft is inflated, the pressure value is detected by the pressure sensor, the radial pressure value applied to the rotating shaft is balanced, the motor is maintained on site by replacing the end cover and the bearing, the problem of attraction of the stator and the rotor can be effectively solved, the possibility of site maintenance is realized, and the permanent magnet motor has the characteristics of accurate positioning, convenience in operation, high reliability, convenience in maintenance and the like, and is particularly suitable for large permanent magnet motors which have high requirements on high performance and reliability and need to be maintained on site.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
fig. 2 is an overall external view of the motor of the present invention after being installed.
The names corresponding to the marks in the figure are as follows: the device comprises a rotating shaft 1, a bearing 2, an end cover 3, an air bag 4, a pressure sensor 5, an adjusting screw rod 6, a fixed support 7 and a stator 8.
Detailed Description
The invention designs a set of special fixed limiting device aiming at the characteristic that the stator and the rotor of the permanent magnet motor attract each other under the condition of electrifying, and the provided permanent magnet motor is particularly suitable for occasions where large permanent magnet motors are difficult to maintain on the spot, such as ship propulsion, industrial and mining enterprises and the like.
The invention is further illustrated by the following figures and examples.
Example 1
The invention designs a set of special fixed limiting device aiming at the characteristic that the stator and the rotor attract each other under the condition that the permanent magnet motor is electrified.
Fig. 1 shows a novel field-serviceable permanent magnet motor disclosed in the present invention. The device comprises a rotor, a rotating shaft 1, a bearing 2, an end cover 3, an air bag 4, a pressure sensor 5, an adjusting screw rod 6, a fixed support 7, a stator 8 and the like. Evenly be provided with a plurality of mounting holes along the circumference on the stator 8, install adjusting screw 6 through fixing support 7 on the mounting hole, adjusting screw 6 is along the directional pivot 1 of stator 8 direction of radius, is provided with gasbag 4 between adjusting screw 6 and the pivot 1, and gasbag 4 has a plurality ofly, corresponds adjusting screw 6 respectively, and adjusting screw 6's end is provided with pressure sensor 5.
The installation mode of the novel permanent magnet motor is as follows:
firstly, the adjusting screw rod 6 is screwed into the fixed support 7.
Then, the pressure sensor 5 is fixed to the adjustment screw 6, the airbag 4 is fixed to the adjustment screw 6, and the pneumatic tube of the airbag 4 and the lead wire of the pressure sensor 5 are axially led out from the adjustment screw 6.
Next, the fixing bracket 4 is fixed on the circumference of the stator 8, and the distance between the air bag 4 and the rotation shaft 1 is adjusted to a proper value. A plurality of air bags 4, pressure sensors 5, adjusting screw rods 6 and fixed supports 7 which are uniformly arranged in the circumferential direction are all installed and adjusted in place.
Then, several air bags 4 are inflated through air pressure tubes, respectively, and the pressure values of the pressure sensors 5 are detected. When the pressure value is balanced (or the gravity influence can be balanced by adjusting the pressure value difference in consideration of the gravity influence), and the pressure value is larger than the minimum design value, the rotor is fixed in place.
When the permanent magnet motor needs to be maintained on site, the permanent magnet motor end cover 3 and the bearing 2 are removed, the bearing 2 and the sealing part of the bearing 2 can be maintained and replaced due to the fact that the rotating shaft 1 is fixed in a working state by the air bag 4, and after the end cover 3 and the bearing 2 are completely replaced and reassembled in place, the maintenance tool consisting of the air bag 4, the pressure sensor 5, the adjusting screw rod 6 and the fixed support 7 is sequentially removed.
Example 2
In contrast to the exemplary embodiment described above, the adjusting spindle 6 is replaced by a hydraulic cylinder which is fixed to the fixed bearing 7.
Example 3
Different from the above embodiment, the adjusting screw rod 6 is installed into the fixed support 7 by screwing, and the hydraulic cylinder is arranged on the adjusting screw rod 6, that is, the adjusting mechanism can adopt different combinations to realize the function besides adopting a single part such as a screw rod or an air bag.
Example 4
Different from the above embodiments, the air bag 4 is an integral air bag surrounding the rotating shaft 1, and the radial fixing scheme of the rotating shaft 1 can be adjusted by adopting a plurality of screw rods and can also be locked by adopting the integral air bag.
Example 5
Fig. 2 shows an external view of the device, and different from the above embodiment, three or more than three adjusting screw rods 6 can be arranged in the circumferential direction.
Example 6
Unlike the above embodiments, the pressure control may also use other ways to detect the distance or pretension, in addition to using the pressure sensor to detect the pressure.
The scope of protection of the invention is not limited to the embodiments described above.
Claims (5)
1. The utility model provides a but permanent-magnet machine of field maintenance, includes stator (8), rotor and fixes end cover (3) at stator (8) front end, the rotor draw forth pivot (1), end cover (3) on be provided with bearing (2) that support pivot (1), its characterized in that: stator (8) on evenly be provided with a plurality of mounting holes along the circumference, the mounting hole on install length-adjustable's support piece through fixing support (7), support piece along stator (8) radial direction directional pivot (1), be provided with gasbag (4) between support piece and pivot (1), the support piece end is provided with pressure sensor (5).
2. A field serviceable permanent magnet machine according to claim 1, characterised in that the air bag (4) is a plurality of separate air bags corresponding to the support or an integral air bag surrounding the shaft (1).
3. A field-serviceable permanent magnet machine according to claim 2, characterised in that the support element is an adjusting screw (6) screwed onto the fixed support (7) or a hydraulic cylinder fixed to the fixed support (7).
4. A field-serviceable permanent magnet machine according to claim 2, characterised in that the support elements are an adjusting screw (6) screwed onto the fixed support (7) and a hydraulic cylinder fixed to the adjusting screw (6).
5. A field-serviceable permanent magnet machine according to claim 1 or 2 or 3 or 4, characterised in that the number of adjusting screws (6) is not less than three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010319308.8A CN111525761A (en) | 2020-04-21 | 2020-04-21 | Permanent magnet motor capable of being maintained on site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010319308.8A CN111525761A (en) | 2020-04-21 | 2020-04-21 | Permanent magnet motor capable of being maintained on site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111525761A true CN111525761A (en) | 2020-08-11 |
Family
ID=71903822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010319308.8A Pending CN111525761A (en) | 2020-04-21 | 2020-04-21 | Permanent magnet motor capable of being maintained on site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111525761A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4866111U (en) * | 1971-11-25 | 1973-08-22 | ||
| US20030127274A1 (en) * | 2000-11-18 | 2003-07-10 | Peter Dominke | Coupling for a steer-by-wire steering system |
| CN1848609A (en) * | 2005-04-13 | 2006-10-18 | 日立工机株式会社 | Electric tool |
| CN101494410A (en) * | 2008-01-23 | 2009-07-29 | 三菱电机株式会社 | Inspection device for air gap off-centering of monocyclic-start induction motor and air gap correcting method |
| CN108321960A (en) * | 2017-12-14 | 2018-07-24 | 宁波德昌电机制造有限公司 | A kind of power-assisted steering electric machine structure |
| CN109378955A (en) * | 2018-12-24 | 2019-02-22 | 重庆赛力盟电机有限责任公司 | Permanent magnet machine rotor assembly tooling |
| CN209844785U (en) * | 2019-07-03 | 2019-12-24 | 德州亨力防爆电机有限公司 | Motor stator and rotor punching sheet processing device |
-
2020
- 2020-04-21 CN CN202010319308.8A patent/CN111525761A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4866111U (en) * | 1971-11-25 | 1973-08-22 | ||
| US20030127274A1 (en) * | 2000-11-18 | 2003-07-10 | Peter Dominke | Coupling for a steer-by-wire steering system |
| CN1848609A (en) * | 2005-04-13 | 2006-10-18 | 日立工机株式会社 | Electric tool |
| CN101494410A (en) * | 2008-01-23 | 2009-07-29 | 三菱电机株式会社 | Inspection device for air gap off-centering of monocyclic-start induction motor and air gap correcting method |
| CN108321960A (en) * | 2017-12-14 | 2018-07-24 | 宁波德昌电机制造有限公司 | A kind of power-assisted steering electric machine structure |
| CN109378955A (en) * | 2018-12-24 | 2019-02-22 | 重庆赛力盟电机有限责任公司 | Permanent magnet machine rotor assembly tooling |
| CN209844785U (en) * | 2019-07-03 | 2019-12-24 | 德州亨力防爆电机有限公司 | Motor stator and rotor punching sheet processing device |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200811 |