CN204231101U - A kind of external rotor generator without bearing - Google Patents
A kind of external rotor generator without bearing Download PDFInfo
- Publication number
- CN204231101U CN204231101U CN201420760454.4U CN201420760454U CN204231101U CN 204231101 U CN204231101 U CN 204231101U CN 201420760454 U CN201420760454 U CN 201420760454U CN 204231101 U CN204231101 U CN 204231101U
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- rotor
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- stator
- diesel engine
- flywheel
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model relates to electrical generator fields, object is to provide a kind of external rotor generator without bearing, described external rotor generator without bearing, comprises stator, rotor and casing, and described stator is connected with described casing, described rotor is arranged on outside described stator, described casing is connected with the flywheel casing of diesel engine, and described rotor is connected with the flywheel of diesel engine, and described rotor inner wall is provided with magnet steel, the iron core be provided with in described stator and coil, described coil winding is in described iron core outer side slot.The beneficial effects of the utility model are: casing is connected with the flywheel casing of diesel engine, rotor is connected with the flywheel of diesel engine, do not contact between stators and rotators, but by the mode of outside location and installation, stator is installed in the rotor, therefore without the need to installing bearing between stators and rotators, mechanical loss is little, and generating efficiency is high.
Description
Technical field
The utility model relates to electrical generator fields, particularly a kind of external rotor generator without bearing.
Background technology
All have a bearing (single-bearing) in conventional electric generators structure in existing product at least or have two bearings (duplex bearing), the rotor of rotation is inner at electric machine stator iron, and namely stator is in the outside of rotor, the front end end cap of single bearing generator docks with flywheel shell of diesel engine, rotor is connected with diesel engine flywheel by disc, the mechanical energy of diesel engine is passed to generator thus makes generator operation, and general outer rotor generator, all there is bearing arrangement, rotor is rotatably connected by bearing and stator, diesel engine directly drives and is positioned at outside rotor generating, but the setting of bearing makes the volume of generator increase, structure is more complicated, inconvenience is produced when maintenance, and the structure of bearing more or less all can produce some frictional force, loss mechanical energy, the generating efficiency of generator is reduced.
Utility model content
The purpose of this utility model is to overcome above-mentioned defect, provides the external rotor generator without bearing that a kind of structure is simple, generating efficiency is high.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of external rotor generator without bearing, comprise stator, rotor and casing, described stator is connected with described casing, described rotor is arranged on outside described stator, and described casing is connected with the flywheel casing of diesel engine, and described rotor is arranged on the flywheel of diesel engine, described rotor inner wall is provided with magnet steel, be provided with iron core and coil in described stator, described iron core is provided with groove, and described coil winding is in the groove of described iron core.
Further, described rotor is connected with the flywheel of diesel engine by bolt.
Further, described magnet steel in described rotor inner wall in being equally spaced.
Further, described rotor inner wall is provided with the mounting groove matched with described magnet steel, and the A/F of described mounting groove is less than the bottom width of described mounting groove, and described magnet steel loads in described mounting groove vertically.
Further, the ventilation hole that is provided with of described casing outer wall.
The beneficial effects of the utility model are: casing is connected with the flywheel casing of diesel engine, and rotor is directly installed on the flywheel of diesel engine, ensure certain air gap between stators and rotators, but by the mode of outside location and installation, stator is installed in the rotor, therefore without the need to installing bearing between stators and rotators, mechanical loss is little, generating efficiency is high, the axial dimension of generator is shorter, overall volume is less, cost-saving, and parts are few, safeguard simple, reliability improves greatly.
Accompanying drawing explanation
Fig. 1 is the structure chart of the utility model embodiment external rotor generator without bearing.
Fig. 2 is the end view of the utility model embodiment external rotor generator without bearing.
Fig. 3 is the vertical view of the utility model embodiment external rotor generator without bearing.
Label declaration:
1, stator; 2, rotor; 3, casing; 21, magnet steel; 11, iron core; 12, coil; 22, mounting groove; 31, ventilation hole.
Embodiment
By describing technology contents of the present utility model, structural feature in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with execution mode.
The design of the utility model most critical is: do not contact between stators and rotators, but is installed in the rotor by stator by the mode of outside location and installation, and mechanical loss is little, and generating efficiency is high.
Refer to shown in Fig. 1 to Fig. 3, the external rotor generator without bearing of the present embodiment, comprise stator 1, rotor 2 and casing 3, described stator 1 is connected with described casing 3, described rotor 2 is arranged on outside described stator 1, described casing 3 is connected with the flywheel casing of diesel engine, described rotor 2 is arranged on the flywheel of diesel engine, described rotor 2 inwall is provided with above magnet steel 21, iron core 11 and coil 12 is provided with in described stator 1, described iron core 11 is provided with groove, and described coil 12 is wrapped in the groove of described iron core 11.
Operation principle of the present utility model is:
Because rotor 2 is directly installed on the flywheel of diesel engine, the rear flywheel rotor driven 2 of diesel engine starting rotates, iron core 11 and coil 12 is provided with in stator 1, voltage is produced by electromagnetic induction in coil 12 when rotor 2 rotates, the magnetic steel material of permanent magnetism due to what adopt in rotor 2, without the need to voltage-regulation and excitation unit in generator.
Generator of the present utility model adopts external rotor permanent magnet intermediate frequency multi-polar structure, the frequency of generator is intermediate frequency, operating frequency can up to 300-500Hz, the feature that DC ripple is little after rectification, on the other hand, this rotor 2 is outside, the power density of motor is high, stator 1 iron core can design shorter, thus in stress analysis, determines it is feasible for realizing bearing-free structure, and actual model machine runs and is also confirmed.
From foregoing description, the beneficial effects of the utility model are: casing 3 is connected with the flywheel casing of diesel engine, rotor 2 is directly installed on the flywheel of diesel engine, do not contact between stator 1 and rotor 2, but by the mode of outside location and installation, stator 1 is arranged in rotor 2, therefore without the need to installing bearing between stator 1 and rotor 2, mechanical loss is little, generating efficiency is high, and the axial dimension of generator is shorter, and overall volume is less, cost-saving, parts are few, and safeguard simple, reliability improves greatly.
Further, described rotor 2 is connected with the flywheel of diesel engine by bolt.
Seen from the above description, bolt connectivity robustness is good, and is also convenient for changing part when breaking down.
Further, described magnet steel 21 in described rotor inner wall in being equally spaced.
Seen from the above description, magnet steel 21 in being equally spaced, makes the field homogeneity in rotor distribute in described rotor inner wall.
Further, described rotor 2 inwall is provided with the mounting groove 22 matched with described magnet steel 21, and the A/F of described mounting groove 22 is less than the bottom width of described mounting groove 22, and described magnet steel 21 loads in described mounting groove 22 vertically.
Seen from the above description, the A/F of mounting groove 22 is less than the bottom width of mounting groove 22, and magnet steel 21 loads in mounting groove 22 vertically, makes the installation of magnet steel 21 more firm, not easily comes off.
Further, described casing 3 outer wall is provided with ventilation hole 31.
Seen from the above description, casing 3 outer wall is provided with above ventilation hole 31, and rotor 2 can produce wind by nature when rotating, thus reduces internal temperature, without the need to additionally arranging cooling fan.
Please refer to shown in Fig. 1 to Fig. 3, embodiment one of the present utility model is:
A kind of external rotor generator without bearing, comprise stator 1, rotor 2 and casing 3, described stator 1 is connected with described casing 3, described rotor 2 is arranged on outside described stator 1, described casing 3 is connected with the flywheel casing of diesel engine, described rotor 2 is arranged on the flywheel of diesel engine, described rotor 2 inwall is provided with above magnet steel 21, iron core 11 and coil 12 is provided with in described stator 1, described iron core 11 is provided with groove, described coil 12 is wrapped in the groove of described iron core 11, described rotor 2 is connected with the flywheel of diesel engine by bolt, described magnet steel 21 in described rotor inner wall in being equally spaced, described rotor 2 inwall is provided with the mounting groove 22 matched with described magnet steel 21, the A/F of described mounting groove 22 is less than the bottom width of described mounting groove 22, described magnet steel 21 loads in described mounting groove 22 vertically, described casing 3 outer wall is provided with ventilation hole 31.
In sum, the external rotor generator without bearing that the utility model provides, casing is connected with the flywheel casing of diesel engine, rotor is directly installed on the flywheel of diesel engine, do not contact between stators and rotators, but by the mode of outside location and installation, stator is installed in the rotor, therefore without the need to installing bearing between stators and rotators, mechanical loss is little, generating efficiency is high, the axial dimension of generator is shorter, overall volume is less, cost-saving, parts are few, safeguard simple, reliability improves greatly, rotor is connected with the flywheel of diesel engine by bolt, fastness is good, and be also convenient for changing part when breaking down, magnet steel in described rotor inner wall in being equally spaced, field homogeneity in rotor is distributed, the A/F of mounting groove is less than the bottom width of mounting groove, magnet steel loads in mounting groove vertically, make the installation of magnet steel more firm, not easily come off, the ventilation hole that casing outer wall is provided with, rotor can produce wind by nature when rotating, thus reduction internal temperature, without the need to additionally arranging cooling fan.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (5)
1. an external rotor generator without bearing, it is characterized in that: comprise stator, rotor and casing, described stator is connected with described casing, described rotor is arranged on outside described stator, and described casing is connected with the flywheel casing of diesel engine, and described rotor is arranged on the flywheel of diesel engine, described rotor inner wall is provided with magnet steel, be provided with iron core and coil in described stator, described iron core is provided with groove, and described coil winding is in the groove of described iron core.
2. external rotor generator without bearing according to claim 1, is characterized in that: described rotor is connected with the flywheel of diesel engine by bolt.
3. external rotor generator without bearing according to claim 1, is characterized in that: described magnet steel in described rotor inner wall in being equally spaced.
4. external rotor generator without bearing according to claim 1, it is characterized in that: described rotor inner wall is provided with the mounting groove matched with described magnet steel, the A/F of described mounting groove is less than the bottom width of described mounting groove, and described magnet steel loads in described mounting groove vertically.
5. external rotor generator without bearing according to claim 1, is characterized in that: described casing outer wall is provided with ventilation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420760454.4U CN204231101U (en) | 2014-12-05 | 2014-12-05 | A kind of external rotor generator without bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420760454.4U CN204231101U (en) | 2014-12-05 | 2014-12-05 | A kind of external rotor generator without bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204231101U true CN204231101U (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420760454.4U Active CN204231101U (en) | 2014-12-05 | 2014-12-05 | A kind of external rotor generator without bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204231101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327137A (en) * | 2020-04-07 | 2020-06-23 | 北京理工大学 | Outer rotor structure of generator |
-
2014
- 2014-12-05 CN CN201420760454.4U patent/CN204231101U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327137A (en) * | 2020-04-07 | 2020-06-23 | 北京理工大学 | Outer rotor structure of generator |
| CN111327137B (en) * | 2020-04-07 | 2021-09-07 | 北京理工大学 | Outer rotor structure of generator |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |