CN111987826A - End ring structure of squirrel cage rotor - Google Patents
End ring structure of squirrel cage rotor Download PDFInfo
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- CN111987826A CN111987826A CN202010913374.8A CN202010913374A CN111987826A CN 111987826 A CN111987826 A CN 111987826A CN 202010913374 A CN202010913374 A CN 202010913374A CN 111987826 A CN111987826 A CN 111987826A
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- block
- end ring
- copper
- groove
- blocks
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- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention discloses an end ring structure of a squirrel cage rotor, which comprises a first end ring and a second end ring, wherein the first end ring is composed of four same first end ring blocks, the four first end ring blocks are fixedly connected through welding, the second end ring is composed of four same second end ring blocks, the four second end ring blocks are fixedly connected through welding, a first connecting device is arranged inside the first end ring blocks, a second connecting device is arranged inside the second end ring blocks, a laminated guide bar is arranged between the first connecting device and the second connecting device, the end ring structure of the squirrel cage rotor adopts a novel connecting structure, the original hard connection is changed into flexible connection, the internal stress between the guide bar and the end ring is greatly reduced, the connecting strength is improved, and the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of motor rotor accessories, in particular to an end ring structure of a squirrel cage rotor.
Background
The conducting bars and the end ring of the squirrel-cage rotor are welded together, the conducting bars are subjected to larger centrifugal force under high-speed rotation, the rotor is supposed to be horizontally arranged, namely, the joint is subjected to larger stress, the stress direction is radial, when the rotor starts to run instantaneously or is stopped emergently, the joint of the conducting bars and the end ring is subjected to tangential stress due to large instantaneous acceleration, so that the joint is damaged repeatedly to influence the service life, and therefore, the end ring structure of the squirrel-cage rotor is provided.
Disclosure of Invention
The present invention is directed to an end ring structure of a squirrel cage rotor to solve the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an end ring structure of squirrel cage rotor, includes first end ring and second end ring, first end ring comprises four the same first end ring blocks, and connects through welded fastening between four first end ring blocks, the second end ring comprises four the same second end ring blocks, and connects through welded fastening between four second end ring blocks, first end ring block internally mounted has first connecting device, second end ring block internally mounted has second connecting device, install lamination formula gib block between first connecting device and the second connecting device.
Preferably, the first connecting device comprises a first pin, a first floating block, a first extending hole, a threaded sleeve, a first groove, a first elastic cushion block and a conductive wedge block, the first pin is fixedly connected to one side of the first end ring block, the first floating block is installed on the outer side of the first pin, the first extending hole is formed in the first floating block, the inner wall of the first extending hole is in sliding connection with the first pin, a thread is formed in the outer side of one end, away from the first end ring block, of the first pin, the threaded sleeve is in threaded connection with the outer side of the first pin, a first groove is formed in one end, close to the laminated guide strip, of the first end ring block, the inner wall of the first groove is a wedge surface, the first elastic cushion block is clamped above the inner wall of the first groove, the conductive wedge block is placed below the first elastic cushion block, one end, away from the first elastic cushion block, of the conductive wedge block is in contact with the first floating block, and the wedge surface of the conductive wedge block is correspondingly contacted with the wedge surface of the first groove.
Preferably, the second connecting device comprises a second groove, a second extension hole, a second floating block, a second pin, a third groove, a second elastic cushion block, a moving copper block and a conductive copper block, a second groove is arranged on one side of the second end ring block close to the laminated conducting bar, a second extension hole is arranged on one side of the second groove, the inner wall of the second groove is connected with a second floating block in a sliding way, one side of the second floating block close to the second extension hole is fixedly connected with a second pin, the second pin is connected with the second extension hole in a sliding way, a third groove is arranged on one side of the second floating block far away from the second pin, a second elastic cushion block is arranged on the inner wall of the third groove, a movable copper block is arranged on one side of the second elastic cushion block far away from the third groove, and one end of the movable copper block is inserted into the inner wall of the third groove, and one side of the movable copper block, which is far away from the second elastic cushion block, is provided with a conductive copper block.
Preferably, the lamination formula conducting bar includes locating lever, first copper billet, second copper billet, first flexible pole and second flexible pole, first slider one side fixedly connected with locating lever, the locating lever passes electrically conductive voussoir and conduction copper billet and second slider fixed connection, and electrically conductive voussoir and conduction copper billet and locating lever sliding connection, locating lever outside equidistance cover is equipped with a plurality of first copper billets and second copper billet, first copper billet and second copper billet dislocation are in proper order placed in turn, the first flexible pole of one side fixedly connected with of second copper billet is kept away from to first copper billet, the flexible pole of one side fixedly connected with second of first copper billet is kept away from to the second copper billet.
Preferably, the first slider, the first flexible beam and the second flexible beam are made of insulating materials.
Preferably, the first copper block and the second copper block are staggered up and down and not staggered left and right.
Preferably, the movable copper block is always connected with the second end ring block.
Compared with the prior art, the invention has the beneficial effects that: under high-speed rotation, the laminated conducting bar is subjected to larger centrifugal force, the direction is radial, the conducting wedge block is driven by the positioning rod to overcome the defect that the first elastic cushion block slightly moves upwards, the second floating block at the right end also moves upwards, the laminated conducting bar is subjected to left and right extrusion forces due to the arrangement of the wedge surfaces, namely, the centrifugal force is converted into extrusion forces among copper blocks, the connection strength is protected, and the conduction reliability is improved. Meanwhile, the internal stress between the conducting bar and the end ring is greatly reduced, the connection strength is improved, and the service life is prolonged.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a second schematic view of the overall structure of the present invention;
FIG. 3 is an overall sectional structural view of the present invention;
FIG. 4 is an enlarged view of part A of FIG. 3;
fig. 5 is an enlarged schematic view of part B of fig. 3.
In the figure: 1. a first end ring; 2. a second end ring; 3. a first end ring block; 4. a second end ring block; 5. a first connecting means; 51. a first pin; 52. a first slider; 53. a first elongated hole; 54. a threaded sleeve; 55. a first groove; 56. a first resilient pad; 57. a conductive wedge; 6. a second connecting means; 61. a second groove; 62. a second elongated hole; 63. a second slider; 64. a second pin; 65. a third groove; 66. a second resilient pad; 67. moving the copper block; 68. a conductive copper block; 7. a laminated conducting bar; 71. positioning a rod; 72. a first copper block; 73. a second copper block; 74. a first flexible rod; 75. a second flexible rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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, the present invention provides a technical solution: the utility model provides an end ring structure of squirrel cage rotor, includes first end ring 1 and second end ring 2, first end ring 1 comprises four the same first end ring pieces 3, and connects through welded fastening between four first end ring pieces 3, and be convenient for processing, assembly and change, second end ring 2 comprises four the same second end ring pieces 4, and connects through welded fastening between four second end ring pieces 4, 3 internally mounted of first end ring piece have first connecting device 5, 4 internally mounted of second end ring piece have second connecting device 6, install lamination formula gib 7 between first connecting device 5 and the second connecting device 6.
Referring to fig. 2 and 4, the first connecting device 5 includes a first pin 51, a first slider 52, a first extending hole 53, a threaded sleeve 54, a first groove 55, a first elastic cushion block 56 and a conductive wedge 57, the first pin 51 is fixedly connected to one side of the first end ring block 3, the first slider 52 is mounted on the outside of the first pin 51, the first extending hole 53 is formed inside the first slider 52, so that the first slider 52 allows a certain small displacement in the up-down direction, the inner wall of the first extending hole 53 is slidably connected to the first pin 51, the outer side of one end of the first pin 51 away from the first end ring block 3 is provided with a thread, the outer side of the thread is threadedly connected to the threaded sleeve 54, one end of the first end ring block 3 close to the laminated guide bar 7 is provided with a first groove 55, one side of the inner wall of the first groove 55 is a wedge surface, the first elastic cushion block 56 is clamped above the inner wall of the first groove 55, and a conductive wedge block 57 is arranged below the first elastic cushion block 56, one end of the conductive wedge block 57, which is far away from the first elastic cushion block 56, is in contact with the first slider 52, and the wedge surface of the conductive wedge block 57 is in corresponding contact with the wedge surface of the first groove 55.
Referring to fig. 2 and 5, the second connecting device 6 includes a second groove 61, a second extending hole 62, a second floating block 63, a second pin 64, a third groove 65, a second elastic cushion block 66, a movable copper block 67 and a conductive copper block 68, the second end ring block 4 has a second groove 61 on one side thereof close to the laminated guide bar 7, the second extending hole 62 is formed on one side of the second groove 61, the second floating block 63 is slidably connected to an inner wall of the second groove 61, the second pin 64 is fixedly connected to one side of the second floating block 63 close to the second extending hole 62, the second pin 64 is slidably connected to the second extending hole 62, the second pin 64 serves as a limit of a floating displacement of the second floating block 63, the third groove 65 is formed on one side of the second floating block 63 away from the second pin 64, the second elastic cushion block 66 is disposed on an inner wall of the third groove 65, the second elastic cushion block 66 is far away from one side of the third groove 65 and is provided with a movable copper block 67, one end of the movable copper block 67 is inserted into the inner wall of the third groove 65, one side of the movable copper block 67, which is far away from the second elastic cushion block 66, is provided with a conductive copper block 68, the movable copper block 67 is always connected with the second end ring block 4, and a closed loop is guaranteed to be formed.
Referring to fig. 2, 3, 4 and 5, the laminated conducting bar 7 includes a positioning rod 71, a first copper block 72, a second copper block 73, a first flexible rod 74 and a second flexible rod 75, the positioning rod 71 is fixedly connected to one side of the first floating block 52, the positioning rod 71 passes through the conductive wedge 57 and the conductive copper block 68 to be fixedly connected to the second floating block 63, the conductive wedge 57 and the conductive copper block 68 are slidably connected to the positioning rod 71, the outer side of the positioning rod 71 is equidistantly sleeved with a plurality of first copper blocks 72 and second copper blocks 73, the left end of the positioning rod passes through the first elastic cushion 56 and the wedge surface to generate a rightward force, the right end of the positioning rod passes through the second elastic cushion 66 to generate a leftward force, the two forces act together to compress the copper blocks, the first copper blocks 72 and the second copper blocks 73 are alternately arranged in a staggered manner, the first copper blocks 72 and the second copper blocks 73 are staggered up and down and left, the first copper block 72 is fixedly connected with a first flexible rod 74 at one side far from a second copper block 73, the second copper block 73 is fixedly connected with a second flexible rod 75 at one side far from the first copper block 72, and the function of the flexible rod is that when the rotor starts instantaneously or stops emergently, due to the fact that instantaneous acceleration is large, the guide bar is subjected to tangential stress, on one hand, tangential force acts on the positioning rod 71, on the other hand, energy is absorbed through deformation of the first flexible rod 74 and the second flexible rod 75, and the first slider 52, the first flexible rod 74 and the second flexible rod 75 are made of insulating materials.
The working principle is as follows: under high-speed rotation, the laminated guide bar 7 is subjected to larger centrifugal force, the direction is radial, the conductive wedge blocks 57 are driven by the positioning rods 71 to overcome the defect that the first elastic cushion blocks 56 slightly move upwards, the second floating blocks 63 at the right end move upwards, the laminated guide bar 7 is subjected to left and right extrusion forces due to the arrangement of wedge surfaces, namely, the centrifugal force is converted into extrusion forces among copper blocks, the connection strength is protected, and the conduction reliability is improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An end ring structure of a squirrel cage rotor, comprising a first end ring (1) and a second end ring (2), characterized in that: the first end ring (1) is composed of four identical first end ring blocks (3), the four first end ring blocks (3) are fixedly connected through welding, the second end ring (2) is composed of four identical second end ring blocks (4), the four second end ring blocks (4) are fixedly connected through welding, a first connecting device (5) is installed inside the first end ring blocks (3), a second connecting device (6) is installed inside the second end ring blocks (4), and laminated guide bars (7) are installed between the first connecting device (5) and the second connecting device (6).
2. An end ring structure of a squirrel cage rotor as claimed in claim 1, characterized in that: the first connecting device (5) comprises a first pin (51), a first floating block (52), a first extension hole (53), a threaded sleeve (54), a first groove (55), a first elastic cushion block (56) and a conductive wedge block (57), wherein the first pin (51) is fixedly connected to one side of the first end ring block (3), the first floating block (52) is installed on the outer side of the first pin (51), the first extension hole (53) is formed in the first floating block (52), the inner wall of the first extension hole (53) is in sliding connection with the first pin (51), a thread is formed in the outer side of one end, far away from the first end ring block (3), of the first pin (51), the threaded sleeve (54) is connected to the outer side of the thread, the first groove (55) is formed in one end, close to the lamination type guide strip (7), of the first end ring block (3), and one side of the inner wall of the first groove (55) is a wedge surface, first recess (55) inner wall top joint has first elastic cushion (56), electrically conductive voussoir (57) have been placed to first elastic cushion (56) below, the one end and the first slider (52) contact of first elastic cushion (56) are kept away from in electrically conductive voussoir (57), the scarf of electrically conductive voussoir (57) corresponds the contact with the scarf of first recess (55).
3. An end ring structure of a squirrel cage rotor as claimed in claim 1, characterized in that: the second connecting device (6) comprises a second groove (61), a second extension hole (62), a second floating block (63), a second pin (64), a third groove (65), a second elastic cushion block (66), a movable copper block (67) and a conductive copper block (68), the second groove (61) is formed in one side, close to the laminated guide bar (7), of the second end ring block (4), the second extension hole (62) is formed in one side of the second groove (61), the second floating block (63) is connected to the inner wall of the second groove (61) in a sliding mode, the second pin (64) is fixedly connected to one side, close to the second extension hole (62), of the second floating block (63), the second pin (64) is connected to the second extension hole (62) in a sliding mode, the third groove (65) is formed in one side, far away from the second pin (64), of the second floating block (63), and the second elastic cushion block (66) is placed on the inner wall of the third groove (65), a movable copper block (67) is placed on one side, away from the third groove (65), of the second elastic cushion block (66), one end of the movable copper block (67) is inserted into the inner wall of the third groove (65), and a conductive copper block (68) is placed on one side, away from the second elastic cushion block (66), of the movable copper block (67).
4. An end ring structure of a squirrel cage rotor as claimed in claim 3, characterized in that: the laminated conducting bar (7) comprises a locating rod (71), a first copper block (72), a second copper block (73), a first flexible rod (74) and a second flexible rod (75), one side of the first floating block (52) is fixedly connected with a positioning rod (71), the positioning rod (71) passes through the conductive wedge block (57) and the conductive copper block (68) to be fixedly connected with the second floating block (63), and the conductive wedge block (57) and the conductive copper block (68) are connected with the positioning rod (71) in a sliding way, a plurality of first copper blocks (72) and second copper blocks (73) are sleeved on the outer side of the positioning rod (71) at equal intervals, the first copper blocks (72) and the second copper blocks (73) are alternately arranged in a staggered way in sequence, a first flexible rod (74) is fixedly connected to one side of the first copper block (72) far away from the second copper block (73), and a second flexible rod (75) is fixedly connected to one side, far away from the first copper block (72), of the second copper block (73).
5. An end ring structure of a squirrel cage rotor as claimed in claim 4, characterized in that: the first slider (52), the first flexible beam (74) and the second flexible beam (75) are of an insulating material.
6. An end ring structure of a squirrel cage rotor as claimed in claim 4, characterized in that: the first copper block (72) and the second copper block (73) are staggered up and down and not staggered left and right.
7. An end ring structure of a squirrel cage rotor as claimed in claim 3, characterized in that: the moving copper block (67) is always connected with the second end ring block (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913374.8A CN111987826A (en) | 2020-09-03 | 2020-09-03 | End ring structure of squirrel cage rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913374.8A CN111987826A (en) | 2020-09-03 | 2020-09-03 | End ring structure of squirrel cage rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111987826A true CN111987826A (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010913374.8A Pending CN111987826A (en) | 2020-09-03 | 2020-09-03 | End ring structure of squirrel cage rotor |
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| CN (1) | CN111987826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465421A (en) * | 2021-12-31 | 2022-05-10 | 江苏中车电机有限公司 | Novel conductor structure for motor |
-
2020
- 2020-09-03 CN CN202010913374.8A patent/CN111987826A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465421A (en) * | 2021-12-31 | 2022-05-10 | 江苏中车电机有限公司 | Novel conductor structure for motor |
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