CN108448768B - Device for controlling end ring balance in motor rotor pre-balancing high-speed rotation - Google Patents
Device for controlling end ring balance in motor rotor pre-balancing high-speed rotation Download PDFInfo
- Publication number
- CN108448768B CN108448768B CN201810198940.4A CN201810198940A CN108448768B CN 108448768 B CN108448768 B CN 108448768B CN 201810198940 A CN201810198940 A CN 201810198940A CN 108448768 B CN108448768 B CN 108448768B
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- China
- Prior art keywords
- ring
- end ring
- copper
- conical surface
- copper end
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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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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 64
- 229910052802 copper Inorganic materials 0.000 claims abstract description 63
- 239000010949 copper Substances 0.000 claims abstract description 63
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Induction Machinery (AREA)
Abstract
The invention discloses a device for controlling end ring balance in motor rotor pre-balancing high-speed rotation, which comprises: the iron core comprises a rotating shaft, a copper end ring, an outer hoop and two inner hoops, wherein the two inner hoops are sleeved on the rotating shaft at intervals and are located at two ends of the iron core, the copper end ring is arranged on the outer side of the inner hoops in the axial direction, a bushing extending into the inner hole of the copper end ring is axially arranged in the inner hoops, the copper end ring comprises a conductive bar connecting ring piece and a limiting ring, the conductive bar connecting ring piece is concentrically arranged on the outer side of the limiting ring in the axial direction, and the outer hoop is sleeved outside the copper end ring. Through the mode, the device for controlling the balance of the end ring in the pre-balanced high-speed rotation of the motor rotor, disclosed by the invention, has the advantages that the copper end ring is internally supported by the inner clamping ring, and the pretightening force is applied to the copper end ring during the rotation through the matching of the second outer conical surface and the second inner conical surface and the matching of the first outer conical surface and the first inner conical surface, so that the problem of radial deformation of the copper end ring during the high-speed rotation is reduced, and the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a device for controlling end ring balance in motor rotor pre-balancing high-speed rotation.
Background
Electric motors typically include a rotor mounted on an inner shaft of a stator. The rotor is divided into an iron core and copper conductive elements, called copper conductor bars, placed along its periphery. The copper conductive strips may be parallel to the axis or may be inclined with respect to the axis. At each end of the rotor, a copper end ring may be connected to a respective end of the copper conducting bar. The copper conducting strips and copper end rings are made of a special conducting material, such as high purity red copper. Since the rotor rotates during normal operation, it is necessary to ensure that the rotor is relatively balanced before the motor can be used. During high speed rotation of the rotor, high loads are placed on the rotor components. For example, at 20000 rpm, the copper end ring can be loaded to 13 kn, and also because the material of the end ring is high-purity red copper, the pressure of 200 MPa at most can be allowed to bear centrifugal deflection during high-speed rotation.
The size of the assembly can affect the balance of the rotor. For example, the end ring material (e.g., copper) may expand outward due to the rotational load. That is, due to the severe rotation, the outer diameter of the end ring may increase, so that the end ring is larger than it is assembled. In this case, the copper end ring is undergoing centrifugal high speed rotational misalignment such that it is no longer concentric with the rotor shaft, causing the rotor to become unbalanced and subject to significant wobble. It is conventional practice to counteract the imbalance of various sources by selectively removing small amounts of material from the end-rings. After the adjustment, the rotor is again rotated at high speed to determine if the adjustment is sufficient. However, this additional spinning process may again introduce some imbalance as the rotational speed is faster, as discussed above with respect to end ring radial deformation, which needs improvement.
Disclosure of Invention
The invention mainly solves the technical problem of providing a device for controlling the balance of an end ring in the pre-balanced high-speed rotation of a motor rotor, reducing the radial deformation of the end ring and improving the stability of high-speed rotation.
In order to solve the technical problems, the invention adopts a technical scheme that: there is provided an apparatus for controlling end ring balance in a motor rotor pre-balancing high speed rotation, comprising: the iron core is arranged on the rotating shaft, the two inner clamping ring intervals are sleeved on the rotating shaft and located at two ends of the iron core, the copper end ring is arranged on the inner side of the inner clamping ring in the axial direction, a bushing extending into the inner hole of the copper end ring is axially arranged in the inner clamping ring, the copper end ring comprises a conductive bar connecting ring piece and a limiting ring, the conductive bar connecting ring piece is concentrically arranged on the outer side of the limiting ring in the axial direction, and the outer clamping ring is sleeved outside the copper end ring.
In a preferred embodiment of the invention, the bushing is externally provided with a first external conical surface, and the copper end ring is internally provided with a first internal conical surface corresponding to the first external conical surface.
In a preferred embodiment of the invention, the outer portion of the stop collar is provided with a second outer tapered surface, and the inner portion of the outer ferrule is provided with a second inner tapered surface corresponding to the second outer tapered surface.
In a preferred embodiment of the present invention, two end faces of the iron core are respectively provided with a concave slot corresponding to the inner snap ring.
In a preferred embodiment of the present invention, a copper conductive strip is axially disposed in the iron core, the copper conductive strip is connected between two copper end rings, and the conductive strip connecting ring sheet is provided with a jack corresponding to the copper conductive strip.
In a preferred embodiment of the invention, the outer hoop is a steel ring, and the inner snap ring and the bushing are of an integrated steel structure.
In a preferred embodiment of the present invention, the inner hole of the inner snap ring is fixed to the rotating shaft in an interference fit manner.
In a preferred embodiment of the present invention, the end of the copper conductive strip extends into the outer hoop and is provided with a step groove corresponding to the outer hoop.
The invention has the beneficial effects that: the invention provides a device for controlling end ring balance in motor rotor pre-balance high-speed rotation, which utilizes an inner clamping ring to support a copper end ring internally, utilizes an outer hoop ring to limit the outer part of the copper end ring, enhances the structural stability, reduces the problem of radial deformation of the copper end ring, applies pretightening force to the copper end ring during rotation by matching a second outer conical surface with a second inner conical surface and matching a first outer conical surface with a first inner conical surface, reduces the problem of radial deformation of the copper end ring during high-speed rotation, and prolongs the service life.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic structural view of a preferred embodiment of an apparatus for controlling end ring balance in a motor rotor pre-balancing high speed rotation according to the present invention;
FIG. 2 is an exploded view of FIG. 1;
fig. 3 is a schematic structural view of the copper end ring, the outer hoop and the inner snap ring of fig. 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Referring to fig. 1 to 3, an embodiment of the invention includes:
an apparatus for controlling end ring balance in a pre-balanced high speed rotation of a rotor of an electric machine, comprising: pivot 105, copper end ring 102, outer hoop 101 and interior snap ring 103, be provided with iron core 104 in the pivot 105, snap ring 103 interval cover is established and is located iron core 104 both ends on pivot 105 in two, the hole of interior snap ring 103 is fixed with pivot 105 interference fit, stable in structure, iron core 104 both ends face indent respectively is provided with the draw-in groove that corresponds with interior snap ring 103, and the installation is convenient.
The copper end rings 102 are arranged on the axial outer side of the inner snap ring 103, the copper conducting strips 106 are axially arranged in the iron core 104, the copper conducting strips 106 are connected between the two copper end rings 102, and the conducting strip connecting ring piece 110 is provided with inserting holes corresponding to the copper conducting strips 106, so that the copper conducting strips 106 can be conveniently inserted and fixed in a welding mode, and the copper end rings 102 are fixedly pulled.
The inner snap ring 103 is axially provided with a bushing 113 extending into an inner hole of the copper end ring 102, the copper end ring 102 comprises a conductive bar connecting ring sheet 110 and a limiting ring 109, the conductive bar connecting ring sheet 110 is concentrically arranged on the axial outer side of the limiting ring 109, the copper end ring 102 is of an integrated red copper structure, the conductive effect is good, and materials are added or removed from the copper end ring 102 to balance a rotor during pre-balancing.
The bushing 113 is externally provided with a first outer conical surface 107, the copper end ring 102 is internally provided with a first inner conical surface 108 corresponding to the first outer conical surface 107, and the cooperation between the first outer conical surface 107 and the first inner conical surface 108 strengthens the support of the inner hole of the copper end ring 102.
The outer hoop ring 101 is sleeved outside the copper end ring 102. The outer portion of the limiting ring 109 is provided with a second outer conical surface 111, a second inner conical surface 112 corresponding to the second outer conical surface 111 is arranged in the outer hoop 101, and the second outer conical surface 111 is matched with the second inner conical surface 112, so that the outer hoop 101 can apply a pretightening force to the copper end ring 102, and the problem of radial deformation during high-speed rotation is reduced.
The outer hoop 101 is a steel ring, the inner snap ring 103 and the bushing 113 are of an integrated steel structure, the structure is firm, the strength is high, deformation is not prone to occurring during high-speed rotation, and constraint on the copper end ring 102 is strengthened. The end of the copper conducting strip 106 extends into the outer hoop 101 and is provided with a step groove corresponding to the outer hoop 101, the outer hoop 101 is used for radially limiting the copper conducting strip 106, and the problems of shaking and deformation are reduced.
In summary, the invention provides a device for controlling end ring balance in motor rotor pre-balancing high-speed rotation,
the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. An apparatus for controlling end ring balance in a pre-balanced high speed rotation of a rotor of an electric machine, comprising: the copper end ring comprises a conductive bar connecting ring piece and a limiting ring, the conductive bar connecting ring piece is concentrically arranged on the axial outer side of the limiting ring, the outer hoop ring is sleeved outside the copper end ring, a first outer conical surface is arranged outside the bushing, a first inner conical surface corresponding to the first outer conical surface is arranged in the copper end ring, a second outer conical surface corresponding to the second outer conical surface is arranged outside the limiting ring, and a copper conductive bar is axially arranged in the iron core, the copper conducting strips are connected between the two copper end rings, the conducting strip connecting ring sheets are provided with jacks corresponding to the copper conducting strips, and the end parts of the copper conducting strips extend into the outer hoop and are provided with step grooves corresponding to the outer hoop.
2. The apparatus of claim 1, wherein the two end faces of the core are respectively provided with a groove corresponding to the inner snap ring.
3. The apparatus for controlling end ring balance in pre-balancing high speed rotation of an electric machine rotor of claim 1, wherein the outer hoop is a steel ring.
4. The apparatus of claim 1 wherein the inner snap ring has an inner bore that is secured in an interference fit with the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810198940.4A CN108448768B (en) | 2018-03-12 | 2018-03-12 | Device for controlling end ring balance in motor rotor pre-balancing high-speed rotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810198940.4A CN108448768B (en) | 2018-03-12 | 2018-03-12 | Device for controlling end ring balance in motor rotor pre-balancing high-speed rotation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108448768A CN108448768A (en) | 2018-08-24 |
| CN108448768B true CN108448768B (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810198940.4A Active CN108448768B (en) | 2018-03-12 | 2018-03-12 | Device for controlling end ring balance in motor rotor pre-balancing high-speed rotation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108448768B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202713095U (en) * | 2012-07-27 | 2013-01-30 | 抚顺煤矿电机制造有限责任公司 | Rotor structure preventing end ring position deviation |
| CN104167879A (en) * | 2013-05-18 | 2014-11-26 | 特斯拉汽车公司 | Rotor assembly with electron beam welded end caps |
| CN105264746A (en) * | 2013-06-19 | 2016-01-20 | 特斯拉汽车公司 | Controlling end ring balance in pre-balancing spinning process |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5326012B2 (en) * | 2012-02-14 | 2013-10-30 | ファナック株式会社 | Rotor with cage-shaped conductor formed with reinforcing structure and method for manufacturing the same |
| CN206364610U (en) * | 2016-12-20 | 2017-07-28 | 陕西航空电气有限责任公司 | A kind of end ring structure for aero dynamo exciter rotor |
-
2018
- 2018-03-12 CN CN201810198940.4A patent/CN108448768B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202713095U (en) * | 2012-07-27 | 2013-01-30 | 抚顺煤矿电机制造有限责任公司 | Rotor structure preventing end ring position deviation |
| CN104167879A (en) * | 2013-05-18 | 2014-11-26 | 特斯拉汽车公司 | Rotor assembly with electron beam welded end caps |
| CN105264746A (en) * | 2013-06-19 | 2016-01-20 | 特斯拉汽车公司 | Controlling end ring balance in pre-balancing spinning process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108448768A (en) | 2018-08-24 |
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