CN212381089U - Double-groove asynchronous motor rotor connecting ring structure - Google Patents
Double-groove asynchronous motor rotor connecting ring structure Download PDFInfo
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- CN212381089U CN212381089U CN202021304552.9U CN202021304552U CN212381089U CN 212381089 U CN212381089 U CN 212381089U CN 202021304552 U CN202021304552 U CN 202021304552U CN 212381089 U CN212381089 U CN 212381089U
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Abstract
The utility model relates to a double flute formula asynchronous motor rotor hookup ring structure, electric motor rotor copper bar (1) both ends welding rotor hookup ring (2), rotor hookup ring (2) constitute asynchronous motor's rotor squirrel cage winding together for welded fastening with rotor copper bar (1), rotor hookup ring annular groove (3) department is double flute structure, first slot (4) are located rotor hookup ring annular groove (3) bottom surface with second slot (5), first slot (4) and second slot (5) position interval equipartition. The utility model discloses guaranteed the electrically conductive reliability of electric motor rotor squirrel-cage winding and long-life functional, through the selection of the rotor coupling ring recess of optimal scheme, the design has better welding characteristic and lower stress amplitude and fatigue utilization rate, and the design of the inside slot type structure of having two equipartitions of seting up of final definite rotor coupling ring recess realizes the function of its rotor squirrel-cage winding electric conductivity.
Description
Technical Field
The utility model relates to a double flute formula asynchronous motor rotor hookup loop constructs.
Background
The asynchronous motor rotor adopts a rotor squirrel-cage winding to weld the rotor copper bar and the rotor connecting ring together. The creep-resistant copper alloy rotor copper bars and rotor connecting rings are applied to the squirrel-cage structure, and the squirrel-cage winding is subjected to thermal analysis, structural analysis and creep analysis to ensure the service life of the squirrel-cage winding. When welding the squirrel cage windings of the rotor of an asynchronous motor, a conventional induction brazing process can be used, which allows each end of the rotor to be individually brazed and a joint with rigid electromagnetic and mechanical properties to be obtained. At present, a rotor squirrel cage structure in an asynchronous motor adopts a hard copper bus as a rotor copper bar, a red copper forging piece is adopted to process a rotor connecting ring, an annular groove slightly wider than the rotor copper bar is processed on the rotor connecting ring, and the rotor copper bar is stretched into the groove to be welded. The traditional welding mode easily wastes welding flux, and welding quality such as air holes and slag inclusion on a welding line at the joint of each copper bar and the end ring cannot be guaranteed when welding is carried out in the whole groove.
The invention content is as follows:
the utility model aims at providing a double flute formula asynchronous motor rotor hookup ring structure can guarantee the intensity of rotor squirrel cage winding, can guarantee the welding quality between rotor copper bar and the rotor hookup ring again. The technical scheme of the utility model is that: the utility model provides a double flute formula asynchronous motor rotor hookup ring structure, motor rotor copper bar (1) both ends welding rotor hookup ring (2), rotor hookup ring (2) and rotor copper bar (1) are welded fastening and constitute asynchronous motor's rotor squirrel cage winding together, rotor hookup ring annular groove (3) department is double flute structure, first slot (4) and second slot (5) are located rotor hookup ring annular groove (3) bottom surface, first slot (4) and second slot (5) position interval equipartition.
The rotor connecting ring (2) and the rotor copper bar (1) are made of creep-resistant copper alloy, and the rotor copper bar (1) is welded and fixed in a rotor connecting ring annular groove (3) of the rotor connecting ring (2).
The utility model has the advantages that:
the utility model discloses the electrically conductive condition of rotor squirrel cage winding according to the rotor core size of asynchronous motor design and design specification requirement, its structure is shown in figure 1. The rotor connecting ring is designed to be of a groove structure with double grooves and is matched with two ends of a rotor copper bar through copper-silver welding to keep the conductivity of the rotor squirrel-cage winding, as shown in figure 2.
The rotor connecting ring and the rotor copper bar form a rotor squirrel-cage winding structure. In the design of the rotor connecting ring, the selection of the material of the rotor connecting ring needs to be considered, and the copper alloy with the same material as the rotor copper bar is selected, so that the conductivity of the squirrel-cage winding can be greatly improved. In addition, in the design process of the rotor coupling ring, factors such as a gap between the rotor copper bar and the rotor coupling ring, the creep fatigue life of the rotor copper bar and the rotor coupling ring, the fatigue life between the rotor copper bar and the rotor coupling ring and the like need to be considered.
In the structural design of the rotor coupling ring, a double-groove type groove is formed in the rotor coupling ring. In order to match with the welding of the rotor copper bar and ensure the welding quality of the rotor copper bar, the air holes and the slag inclusion rate in the welding process are reduced, and the service life of the asynchronous motor is ensured. The groove of the rotor connecting ring is designed to be provided with double grooves, the design and the matching of the two grooves are beneficial to filling of welding fluxes, and the arrangement of the positions of the double grooves in the double groove design and two excircles of the groove of the rotor connecting ring are uniformly distributed in three directions, so that the filling of the welding fluxes is also beneficial. The chamfers at the two edges of the groove of the rotor connecting ring can effectively control the filling of the welding flux in the welding process, so that the welding flux is prevented from overflowing when the groove is fully filled with the welding flux, and finally, the end parts at the two sides of the rotor copper bar are firmly welded with the rotor connecting ring. The structural design of the rotor connecting ring can effectively improve the welding quality between the rotor connecting ring and the rotor copper bar while ensuring the conductivity of the rotor squirrel-cage winding, and provides guarantee for the service life of the asynchronous motor. The technical problem that the welding line between the rotor connecting ring and the rotor copper bar of the asynchronous motor has large porosity and slag inclusion rate is solved.
Drawings
FIG. 1 is a structural view of a rotor coupling ring of a double-groove asynchronous motor
FIG. 2 is a partial cross-sectional view of a rotor coupling ring structure of a double-groove asynchronous motor
FIG. 3 is a schematic view of the welding of a double-groove asynchronous motor and a rotor copper bar
Detailed Description
As shown in figure 1, the rotor connecting ring structure of the double-groove asynchronous motor is characterized in that the two ends of a motor rotor copper bar 1 are welded with rotor connecting rings 2, the rotor connecting rings 2 and the rotor copper bar 1 are welded and fixed together to form a rotor squirrel-cage winding of the asynchronous motor, the annular groove 3 of the rotor connecting rings is of a double-groove structure, a first groove 4 and a second groove 5 are positioned in the bottom surface of the annular groove 3 of the rotor connecting rings, and the first groove 4 and the second groove 5 are uniformly distributed at intervals.
The rotor connecting ring 2 and the rotor copper bar 1 are made of creep-resistant copper alloy, and the rotor copper bar 1 is welded and fixed in a rotor connecting ring annular groove 3 of the rotor connecting ring 2.
According to the size of the rotor coupling ring designed according to the figure 1 and the requirements of the design specifications, the stress analysis calculation and the stress cloud picture calculation are utilized, the rotor coupling ring material meeting the design specifications and the use requirements is selected, and the structural design of the rotor coupling ring is completed. In the structural design of the rotor coupling ring, a double-groove type groove is formed in the rotor coupling ring, and two grooves are respectively defined as a first groove and a second groove. The radius of the groove is designed according to the size of the rotor coupling ring and the size of the annular groove machined on the rotor coupling ring at the center line of the first groove, and the radius of the groove is selected to be 1 mm or 2 mm generally. The radial dimension of the second groove is the same as the radial dimension of the first groove. The design and the matching of the two grooves are beneficial to filling of the welding flux, the filling of the welding flux can be effectively controlled in the welding process, so that the welding flux is ensured to fully fill the grooves, no overflow is generated, and the welding reliability of the two ends of the rotor copper bar and the rotor connecting ring is fully ensured as shown in figure 3. After the rotor connecting ring and the rotor copper bar are brazed, the rotor connecting ring is processed, so that the creep resistance of the rotor copper bar and the rotor connecting ring is considered, the quality of copper silver used can be reduced by the smaller rotor copper bar and the smaller rotor connecting ring, and the operating temperature is controlled within the range required by the design specification. The structural design of the rotor connecting ring can effectively improve the welding quality between the rotor connecting ring and the rotor copper bar while ensuring the conductivity of the rotor squirrel-cage winding, and provides guarantee for the service life of the asynchronous motor. The technical problem that the welding seam between the rotor connecting ring and the rotor copper bar of the asynchronous motor has large porosity and slag inclusion rate is solved.
Claims (2)
1. A double-groove type asynchronous motor rotor connecting ring structure is characterized in that: rotor connecting rings (2) are welded at two ends of a motor rotor copper bar (1), the rotor connecting rings (2) and the rotor copper bar (1) are welded and fixed together to form a rotor squirrel-cage winding of the asynchronous motor, a double-groove structure is arranged at an annular groove (3) of the rotor connecting rings, first grooves (4) and second grooves (5) are located in the bottom surfaces of the annular groove (3) of the rotor connecting rings, and the first grooves (4) and the second grooves (5) are evenly distributed at intervals.
2. The structure of a rotor coupling ring for a double-groove asynchronous motor according to claim 1, wherein: the rotor connecting ring (2) and the rotor copper bar (1) are made of creep-resistant copper alloy, and the rotor copper bar (1) is welded and fixed in a rotor connecting ring annular groove (3) of the rotor connecting ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021304552.9U CN212381089U (en) | 2020-07-07 | 2020-07-07 | Double-groove asynchronous motor rotor connecting ring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021304552.9U CN212381089U (en) | 2020-07-07 | 2020-07-07 | Double-groove asynchronous motor rotor connecting ring structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212381089U true CN212381089U (en) | 2021-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021304552.9U Active CN212381089U (en) | 2020-07-07 | 2020-07-07 | Double-groove asynchronous motor rotor connecting ring structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212381089U (en) |
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2020
- 2020-07-07 CN CN202021304552.9U patent/CN212381089U/en active Active
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