CN102904363A - Salient damping winding structure capable of improving ventilation effect - Google Patents
Salient damping winding structure capable of improving ventilation effect Download PDFInfo
- Publication number
- CN102904363A CN102904363A CN2012103750265A CN201210375026A CN102904363A CN 102904363 A CN102904363 A CN 102904363A CN 2012103750265 A CN2012103750265 A CN 2012103750265A CN 201210375026 A CN201210375026 A CN 201210375026A CN 102904363 A CN102904363 A CN 102904363A
- Authority
- CN
- China
- Prior art keywords
- damping
- salient
- convex type
- width
- amortisseur bar
- Prior art date
- 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
Links
Images
Abstract
The invention belongs to the technical field of a motor and particularly relates to a salient damping winding structure capable of improving ventilation effect; a plurality of damping grooves are arranged on magnetic pole shoes, wherein salient damping bars are embedded into the damping grooves; a strip damping bar salient part is arranged on the salient damping bars respectively; a plurality of structural forms can be adopted by the salient parts; at both ends of the magnetic pole shoes, the salient damping bars are tightly connected with damping rings; and the damping rings between each magnetic pole shoe are in overlap joint by damping ring connection pieces to form a circumferential integrated ring. By adopting the salient structure, the damping winding not only keeps the effect of the existing damping winding for inhibiting free oscillation of a rotor and the effect of improving bearing capacity for asymmetric load of a generator, but also can improve the ventilation effect, thereby further enhancing the ventilation and the cooling capacity of the motor and reducing the temperature rise at each structural place. The salient damping winding structure is applied to ventilate and cool the large salient motor of a large water-turbine generator, a salient wind driven generator and similar structures.
Description
Technical field
The invention belongs to technical field of motors, particularly a kind of convex type damping winding structure that can improve ventilation effect.
Background technology
The damping winding of large-scale salient pole generator setting can improve power system operation stability, weaken superpotential impact, suppress rotor and freely shake, improve generator and bear ability and the acceleration generator automatic self synchronizing of asymmetric load and incorporate system into, its service behaviour is directly connected to the unit safety work.
The raising of large-size machine single-machine capacity mainly realizes by increasing electromagnetic load, thereby but can cause that the iron core of motor stator, rotor and winding loss increase and cause temperature rise to raise, even surpass the permission temperature rise of insulating material and metal material.Therefore must adopt more effective cooling technology improving its specific heat load, thereby the temperature rise of motor each several part is controlled in the allowed band, avoid occurring the turn-to-turn short circuit that causes because of failure of insulation even by faults such as forced-stopping machines, guarantee the operation that it is safe and reliable.
Summary of the invention
The objective of the invention is to improve the motor electromagnetic load in the existing design of electrical motor process in order to solve, cause stator, the too high problem of rotor winding temperature, providing a kind of suppresses under the prerequisite that rotor freely shakes satisfying damping winding, can improve ventilation effect, and then strengthen the convex type damping winding structure of motor ventilation cooling capacity.
The technical solution used in the present invention is:
Be distributed with some damping slots on the magnetic pole pole shoe, in damping slot, embed the convex type amortisseur bar; The projection of described convex type amortisseur bar is the amortisseur bar projection of strip; At magnetic pole pole shoe two ends, convex type amortisseur bar and damping ring are fastenedly connected; Damping ring between each magnetic pole pole shoe is overlapped to form circumferential whole annulus by the damping ring brace.
Described amortisseur bar projection is compared with damping slot notch upper end, and protrusion height is 4 ~ 8 millimeters.
The width of described amortisseur bar projection equates with the damping slot width of rebate.
The copper bar structure of described amortisseur bar projection for being extended in the air gap by the damping slot notch.
4 ~ 10 millimeters of the Width damping slot slot openings of described amortisseur bar projection strengthen structural strength by the width that increases projection.
2 ~ 5 millimeters of described amortisseur bar projection one side Width damping slot slot openings, opposite side equate with the damping slot width of rebate, strengthen structural strength by the width that increases projection.
Described amortisseur bar projection is trapezium structure, 4 ~ 10 millimeters of base Width damping slot slot openings, and 2 ~ 5 millimeters of top margin Width damping slot slot openings strengthen structural strength by the width that increases projection.
Damping ring between described each magnetic pole is fastenedly connected by bolt and pad by two damping ring braces up and down.
Beneficial effect of the present invention is:
This structure has solved the problem that existing large-size machine single-machine capacity develops skill and can not take into account simultaneously with its cooling technology.The convex type amortisseur bar is jointly rotation under rotor drives, and projection is equivalent to improve the additional pressure head element of ventilating system pressure head and flow, and its effect can be compared with electric fan, jointly plays the pectinid effect with rotor.Carry out electromagnetic performance calculating to having the present invention the convex type damping winding that proposes and the generator with existing form damping winding, the two air gap flux density difference is 0.14%, one phase voltage difference is 0.06%, as seen the convex type damping winding can not change the generator electromagnetic performance, can be applicable to strengthen salient pole machine ventilation cooling capacity fully.
Adopt the damping winding of this convex type structure, not only have existing damping winding inhibition rotor and freely shake, improve the effect that generator is born the asymmetric load ability, simultaneously can improve ventilation effect, and then enhancing motor ventilation cooling capacity reduces the temperature rise at each structure place.
Description of drawings
Fig. 1 is convex type damping winding structure front view.
Fig. 2 is that the A of Fig. 1 is to figure.
Fig. 3 is that the B of Fig. 1 is to figure.
Fig. 4 is convex type damping winding and common damping winding air gap flux density comparison diagram.
Fig. 5 is convex type damping winding and common damping winding phase voltage comparison diagram.
Fig. 6 is that full rectangle protrudes the damping winding structure schematic diagram.
Fig. 7 is that half rectangle protrudes the damping winding structure schematic diagram.
Fig. 8 is trapezoidal protrusion damping winding structure schematic diagram.
Number in the figure:
1-convex type amortisseur bar; 1-1-amortisseur bar projection; The 2-damping ring; 3-damping ring brace; 4-magnetic pole pole shoe; The 5-bolt; The 6-pad; The 7-damping slot; 8-damping slot notch.
Embodiment
The invention provides a kind of convex type damping winding structure that can improve ventilation effect, the present invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment 1:
In conjunction with Fig. 1 to Fig. 5 present embodiment is described.
Be milled with some damping slots 7 at magnetic pole pole shoe 4, in damping slot 7, embed ready made convex type amortisseur bar 1, the amortisseur bar projection 1-1 that one strip is arranged on the convex type amortisseur bar 1, compare with damping slot notch 8 upper ends, the protrusion height of amortisseur bar projection 1-1 is 4 ~ 8 millimeters, and its width equates with damping slot notch 8 width.The copper bar structure of amortisseur bar projection 1-1 for being extended in the air gap by damping slot notch 8 is in the air gap between stator inner circle and rotating pole-piece cylindrical.Convex type amortisseur bar 1 and damping ring 2 welding are tightened up with the silver-bearing copper weldering at the generator two ends.Damping ring 2 usefulness damping ring braces 3 between each magnetic pole pole shoe 4 are overlapped to form circumferential whole annulus by bolt 5 and pad 6.
The reasonable size aperture identical with convex type amortisseur bar 1 shape arranged on the damping ring 2, large 0.30 ~ 0.60 millimeter of its aperture ratio convex type amortisseur bar 1 diameter, the length that convex type amortisseur bar 1 stretches out damping ring 2 end faces is 2 ~ 4 millimeters.
The sheet copper of damping ring brace 3 usefulness multilayers 0.5 millimeters thick is made, and its profile is similar to " Ω " shape.
Fig. 4 and Fig. 5 are divided into convex type damping winding and common damping winding air gap flux density comparison diagram and phase voltage comparison diagram.Compare with the generator electromagnetic performance with existing form damping winding, the technical scheme air gap flux density that present embodiment provides, a phase voltage numerical value differ and are respectively 0.001T, 0.006kV, in Fig. 4 and Fig. 5, the curve of convex type damping winding and common damping winding overlaps substantially fully, can find out and adopt the convex type damping winding can not change the motor electromagnetic performance, therefore can utilize the pectinid effect of amortisseur bar projection 1-1 to strengthen large-scale salient pole machine ventilation cooling capacity fully.When the design protrusion height, mainly consider its structural strength and two factors of pectinid ability, avoid causing under the effect of larger centrifugal force, shear stress because amortisseur bar projection 1-1 is too high convex type amortisseur bar 1 disconnected bar, and refrigerating gas forms eddy current between two amortisseur bar projection 1-1, on the other hand, also to guarantee the height of amortisseur bar projection 1-1, make it have certain pectinid ability.
Embodiment 2:
In conjunction with Fig. 6 present embodiment is described, the difference of present embodiment and embodiment 1 is: described amortisseur bar projection 1-1 Width damping slot notch 8 is wide 4 ~ 10 millimeters, and other sizes are identical with embodiment 1 with composition.
Embodiment 3:
In conjunction with Fig. 7 present embodiment is described, the difference of present embodiment and embodiment 1 is: described amortisseur bar projection 1-1 one side Width damping slot notch 8 is wide 2 ~ 5 millimeters, opposite side equates that with damping slot notch 8 width other sizes are identical with embodiment 1 with composition.
Embodiment 4:
In conjunction with Fig. 8 present embodiment is described, the difference of present embodiment and embodiment 1 is: described amortisseur bar projection 1-1 is trapezium structure, base Width damping slot notch 8 is wide 4 ~ 10 millimeters, and top margin Width damping slot notch 8 is wide 2 ~ 5 millimeters, and other sizes are identical with embodiment 1 with composition.
Claims (8)
1. convex type damping winding structure that can improve ventilation effect, comprise convex type amortisseur bar (1), damping ring (2) and damping ring brace (3), it is characterized in that: be distributed with some damping slots (7) on the magnetic pole pole shoe (4), in damping slot (7), embed convex type amortisseur bar (1); The projection of described convex type amortisseur bar (1) is the amortisseur bar projection (1-1) of strip; At magnetic pole pole shoe (4) two ends, convex type amortisseur bar (1) is fastenedly connected with damping ring (2); Damping ring (2) between each magnetic pole pole shoe (4) is overlapped to form circumferential whole annulus by damping ring brace (3).
2. a kind of convex type damping winding structure that can improve ventilation effect according to claim 1 is characterized in that: described amortisseur bar projection (1-1) is compared with damping slot notch (8) upper end, and protrusion height is 4 ~ 8 millimeters.
3. a kind of convex type damping winding structure that can improve ventilation effect according to claim 1, it is characterized in that: the width of described amortisseur bar projection (1-1) equates with damping slot notch (8) width.
4. a kind of convex type damping winding structure that can improve ventilation effect according to claim 1 is characterized in that: the copper bar structure of described amortisseur bar projection (1-1) for being extended in the air gap by damping slot notch (8).
5. a kind of convex type damping winding structure that can improve ventilation effect according to claim 1, it is characterized in that: the Width damping slot notch (8) of described amortisseur bar projection (1-1) is wide 4 ~ 10 millimeters, strengthens structural strength by the width that increases projection.
6. a kind of convex type damping winding structure that can improve ventilation effect according to claim 1, it is characterized in that: described amortisseur bar projection (1-1) side Width damping slot notch (8) is wide 2 ~ 5 millimeters, opposite side equates with damping slot notch (8) width, strengthens structural strength by the width that increases projection.
7. a kind of convex type damping winding structure that can improve ventilation effect according to claim 1, it is characterized in that: described amortisseur bar projection (1-1) is trapezium structure, base Width damping slot notch (8) is wide 4 ~ 10 millimeters, top margin Width damping slot notch (8) is wide 2 ~ 5 millimeters, strengthens structural strength by the width that increases projection.
8. a kind of convex type damping winding structure that can improve ventilation effect according to claim 1 is characterized in that: the damping ring (2) between described each magnetic pole is fastenedly connected by bolt (5) and pad (6) by two damping ring braces (3) up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103750265A CN102904363A (en) | 2012-09-29 | 2012-09-29 | Salient damping winding structure capable of improving ventilation effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103750265A CN102904363A (en) | 2012-09-29 | 2012-09-29 | Salient damping winding structure capable of improving ventilation effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102904363A true CN102904363A (en) | 2013-01-30 |
Family
ID=47576458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103750265A Pending CN102904363A (en) | 2012-09-29 | 2012-09-29 | Salient damping winding structure capable of improving ventilation effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102904363A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104506003A (en) * | 2014-12-18 | 2015-04-08 | 重庆赛力盟电机有限责任公司 | Large and medium synchronous motor damping ring connecting structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB254675A (en) * | 1925-07-06 | 1926-11-25 | Thyssen & Co Ag | Improved damping-winding in rotors of electrical machines |
| US3870912A (en) * | 1972-05-18 | 1975-03-11 | Siemens Ag | Smooth-core rotor for a synchronous electric machine |
| JPS5291107A (en) * | 1976-01-26 | 1977-08-01 | Mitsubishi Electric Corp | Rotary electric machine |
| US5140204A (en) * | 1991-07-05 | 1992-08-18 | Westinghouse Electric Corp. | Heat pipes for cooling pole windings of salient pole machines |
| CN200983521Y (en) * | 2006-12-06 | 2007-11-28 | 湘潭电机股份有限公司 | Novel full-damp coiling structure of protruding synchronous electromotor |
| CN102403854A (en) * | 2011-11-15 | 2012-04-04 | 中电电机股份有限公司 | Synchronous motor of solid pole winding with damp |
-
2012
- 2012-09-29 CN CN2012103750265A patent/CN102904363A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB254675A (en) * | 1925-07-06 | 1926-11-25 | Thyssen & Co Ag | Improved damping-winding in rotors of electrical machines |
| US3870912A (en) * | 1972-05-18 | 1975-03-11 | Siemens Ag | Smooth-core rotor for a synchronous electric machine |
| JPS5291107A (en) * | 1976-01-26 | 1977-08-01 | Mitsubishi Electric Corp | Rotary electric machine |
| US5140204A (en) * | 1991-07-05 | 1992-08-18 | Westinghouse Electric Corp. | Heat pipes for cooling pole windings of salient pole machines |
| CN200983521Y (en) * | 2006-12-06 | 2007-11-28 | 湘潭电机股份有限公司 | Novel full-damp coiling structure of protruding synchronous electromotor |
| CN102403854A (en) * | 2011-11-15 | 2012-04-04 | 中电电机股份有限公司 | Synchronous motor of solid pole winding with damp |
Non-Patent Citations (1)
| Title |
|---|
| 周建国等: "《钎焊工艺及其在增安型无刷励磁同步电动机中的应用》", 《电气防爆》, no. 2, 31 December 2004 (2004-12-31), pages 31 - 32 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104506003A (en) * | 2014-12-18 | 2015-04-08 | 重庆赛力盟电机有限责任公司 | Large and medium synchronous motor damping ring connecting structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204258576U (en) | Motor | |
| EP2692043B1 (en) | Magnetic wedge | |
| CN106411009B (en) | A kind of permanent magnet machine rotor and generator | |
| CN104967236A (en) | Permanent magnet synchronous motor | |
| CN108880037A (en) | Rotor and its assembly method, motor | |
| CN201584875U (en) | Megawatt high-voltage permanent magnet synchronous wind power generator | |
| CN102403854A (en) | Synchronous motor of solid pole winding with damp | |
| CN102904363A (en) | Salient damping winding structure capable of improving ventilation effect | |
| CN204068569U (en) | A kind of high-performance three phase alternating current motor | |
| CN203312945U (en) | Permanent magnetic rotor of three-phase asynchronous motor | |
| CN103401357B (en) | 60MW brushless excitation steam turbine generator | |
| CN105634158B (en) | A kind of steam turbine generator stator-rotator interactive mode side set structure for being beneficial to radiating | |
| CN208386264U (en) | Speed permanent magnet synchronous motor rotor, motor | |
| CN202076915U (en) | Rotor of excitation direct-current (DC) brushless motor | |
| CN103973063B (en) | A kind of new type rotor structure improving magneto starting performance and steady-state behaviour | |
| CN104753280A (en) | Hybrid excitation switched reluctance motor and stator structure thereof | |
| JP6602619B2 (en) | Rotating electric machine or wind power generation system | |
| CN202364084U (en) | Synchromotor with solid magnetic pole having damping windings | |
| CN203352378U (en) | 60MW brushless excitation turbine generator | |
| CN104539129A (en) | Asynchronous starting permanent-magnet synchronous motor and asynchronous motor transformation method | |
| CN204906035U (en) | Permanent magnet rotor , permanent -magnet machine and compressor | |
| RU177673U1 (en) | ELECTRIC MACHINE ROTOR | |
| CN110336400B (en) | Pumped storage motor rotor ventilation structure subassembly and pumped storage motor rotor | |
| CN210608879U (en) | Structure for solving heat dissipation of starting cage of large-scale self-starting rare earth permanent magnet synchronous motor | |
| CN204497936U (en) | A kind of DC brushless motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130130 |