CN212518579U - Inner cooling structure of motor rotor - Google Patents
Inner cooling structure of motor rotor Download PDFInfo
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- CN212518579U CN212518579U CN202021604333.2U CN202021604333U CN212518579U CN 212518579 U CN212518579 U CN 212518579U CN 202021604333 U CN202021604333 U CN 202021604333U CN 212518579 U CN212518579 U CN 212518579U
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Abstract
A motor rotor inner cooling structure is characterized in that a groove on an iron core is sequentially provided with a notch, a straight groove and a ventilation groove from outside to inside, and an auxiliary ventilation channel is arranged on the side wall of the straight groove; and the slot wedge installed in the slot opening is provided with a wedge through slot and a vent arranged in the slot liner of the straight slot, so that the inside of the vent slot and the slot liner are communicated to the outside of the iron core through the auxiliary vent channel and the wedge through slot. Through the setting of this kind of interior cold junction constructs, can greatly improve ventilation performance and cooling capacity, and rotor coil need not carry out extra processing yet and can conveniently install, can also effectively avoid rotor coil's turn-to-turn short circuit problem.
Description
Technical Field
The utility model relates to a motor structure especially relates to an inner cooling structure of electric motor rotor.
Background
The rotor of the motor, that is, the rotating part of the motor, needs to be cooled in order to ensure the safety of the high-speed rotation of the rotor. The cooling of the rotor of an electric machine is generally divided into surface cooling of the rotor body and local internal cooling of the rotor windings. The existing rotor inner cooling structure has insufficient cooling performance, the required coil processing is complex, and the insulation treatment of the rotor coil is complex.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cooling structure in better electric motor rotor of cooling performance to improve electric motor rotor's cooling performance, and reduce the assembly degree of difficulty with the relevant spare part of rotor.
The utility model discloses an inner cooling structure of a motor rotor, which comprises an iron core positioned on a rotating shaft, wherein a plurality of grooves are formed on the outer circular wall of the iron core, and the arrangement direction of the grooves is parallel to the axis of the rotating shaft; the slots comprise straight slots, the central lines of which are arranged along the diameter direction of the iron core, one ends of the straight slots, which are back to the center of the iron core, are communicated to the outer wall of the iron core through notches, ventilation slots are formed in one ends of the straight slots, which are towards the center of the iron core, a plurality of inwards-concave auxiliary ventilation channels are arranged on the side walls of the straight slots at intervals along the direction parallel to the axis of the rotating shaft, and two ends of each auxiliary ventilation channel are communicated to the notches and the ventilation slots; in addition, a slot wedge and a slot liner are respectively arranged in the slot opening and the straight slot, a vent communicated with the auxiliary ventilating duct is arranged at the position, opposite to the auxiliary ventilating duct, on the slot liner, and a wedge through slot communicated with the outer wall of the iron core and the auxiliary ventilating duct is arranged on the slot wedge.
The inner cooling structure of the motor rotor of the utility model has the groove direction parallel to the axis of the rotating shaft and extends from the outer wall of the iron core to the inside of the iron core along the diameter of the iron core to form a strip-shaped through groove which is a notch, a straight groove and a ventilation groove from outside to inside in sequence; notch and straight flute are used for installing slot wedge and slot liner respectively, offer wedge respectively on slot wedge and the slot liner and lead to groove and vent to be linked together with supplementary ventiduct, and supplementary ventiduct communicates the ventilation duct of the most inboard again, make ventilation duct and slot liner inside all lead to outside the iron core through supplementary ventiduct, wedge. Through the setting of this kind of interior cold junction constructs, can greatly improve ventilation performance and cooling capacity, and rotor coil need not carry out extra processing yet and can conveniently install, can also effectively avoid rotor coil's turn-to-turn short circuit problem.
Drawings
Fig. 1 is a schematic structural view of an internal cooling structure of a motor rotor.
Fig. 2 is a radial schematic view of the internal cooling structure of the rotor of the motor shown in fig. 1.
Fig. 3 is an axial view of the internal cooling structure of the rotor of the motor shown in fig. 1.
Fig. 4 is a schematic cross-sectional view of the inner cooling structure a-a of the motor rotor shown in fig. 2.
Fig. 5 is a schematic view of the structure of the tank.
Figure 6 is a schematic view of the arrangement of the wedge and the slot liner installed in the slot.
Detailed Description
An inner cooling structure of a motor rotor comprises an iron core 2 positioned on a rotating shaft 1, wherein a plurality of grooves 3 are formed in the outer circular wall of the iron core, and the arrangement direction of the grooves is parallel to the axis of the rotating shaft; the slots comprise straight slots 4 arranged along the diameter direction of the iron core along the central line, one ends of the straight slots, which are back to the center of the iron core, are communicated to the outer wall of the iron core through notches 5, ventilation slots 6 are formed in one ends of the straight slots, which are towards the center of the iron core, a plurality of inward-concave auxiliary ventilation channels 7 are arranged on the side walls of the straight slots at intervals along the direction parallel to the axis of the rotating shaft, and the two ends of the auxiliary ventilation channels are communicated to the notches and the ventilation slots; the slot wedge 8 and the slot liner 9 are respectively arranged in the slot opening and the straight slot, the slot liner is provided with a vent 91 which is communicated with the auxiliary air duct at the position opposite to the auxiliary air duct, and the slot wedge is provided with a wedge through slot 81 which is communicated with the outer wall of the iron core and the auxiliary air duct; a coil 10 is mounted in the slot liner 9.
As shown in fig. 1-6, the slot direction is parallel to the axis of the rotating shaft, and extends from the outer wall of the iron core to the inside of the iron core along the diameter of the iron core to form a strip-shaped through slot, and the through slot is a slot opening, a straight slot and a ventilation slot from outside to inside in sequence; notch and straight flute are used for installing slot wedge and slot liner respectively, offer wedge respectively on slot wedge and the slot liner and lead to groove and vent to be linked together with supplementary ventiduct, and supplementary ventiduct communicates the most inboard ventiduct again, make inside coil of ventiduct and slot liner all lead to outside the iron core through supplementary ventiduct, wedge. Through the setting of this kind of interior cold junction constructs, can greatly improve ventilation performance and cooling capacity, and rotor coil need not carry out extra processing yet and can conveniently install, can also effectively avoid rotor coil's turn-to-turn short circuit problem.
The inner cooling structure of the motor rotor is characterized in that the two side walls of the straight groove 4 are respectively provided with the auxiliary air ducts 7, the auxiliary air ducts on the two side walls are arranged in a staggered mode along the direction parallel to the axis of the rotating shaft 1, and the cooling performance can be further improved through the arrangement of the auxiliary air ducts.
In the motor rotor internal cooling structure, the notch 5 is dovetail-shaped or trapezoidal, the inner end of the notch is communicated with the straight groove 4, and the width of the outer end of the notch 5 is larger than that of the straight groove 4; the slot wedge 8 and the slot liner 9 are respectively in the shape corresponding to the slot opening 5 and the straight slot 4; thereby improving the fixing strength of the parts and being more convenient for the arrangement of the auxiliary ventilation duct.
Claims (6)
1. The utility model provides an interior cold junction of electric motor rotor, is including being located iron core (2) on pivot (1), and it has a plurality of grooves (3) to open on the excircle wall of iron core, and the direction that sets up of groove parallels its characterized in that with the pivot axis: the slots comprise straight slots (4) arranged along the diameter direction of the iron core along the central line, one ends of the straight slots, which are back to the center of the iron core, are communicated to the outer wall of the iron core through notches (5), ventilation slots (6) are formed in the ends, which are opposite to the center of the iron core, of the straight slots, a plurality of inwards-concave auxiliary ventilation channels (7) are arranged on the side walls of the straight slots at intervals along the direction parallel to the axis of the rotating shaft, and the two ends of the auxiliary ventilation channels are communicated to the notches and the ventilation; and a slot wedge (8) and a slot liner (9) which are respectively arranged in the slot opening and the straight slot, wherein the position on the slot liner, which is opposite to the auxiliary ventilating duct, is provided with a ventilating opening (91) communicated with the auxiliary ventilating duct, and the slot wedge is provided with a wedge through slot (81) communicated with the outer wall of the iron core and the auxiliary ventilating duct.
2. The internal cooling structure for a rotor of an electric machine according to claim 1, wherein: the two side walls of the straight groove (4) are respectively provided with an auxiliary ventilation channel (7), and the auxiliary ventilation channels on the two side walls are arranged in a staggered mode along the direction parallel to the axis of the rotating shaft (1).
3. The internal cooling structure for a rotor of an electric machine according to claim 1 or 2, wherein: the notch (5) is in a dovetail shape, and the inner end of the notch is communicated with the straight groove (4).
4. The internal cooling structure for a rotor of an electric machine according to claim 3, wherein: the width of the outer end of the notch (5) is larger than that of the straight groove (4).
5. The internal cooling structure for a rotor of an electric machine according to claim 4, wherein: the slot wedge (8) and the slot liner (9) are respectively in the shape corresponding to the notch (5) and the straight slot (4).
6. The internal cooling structure for a rotor of an electric machine according to claim 1 or 2, wherein: the slot liner (9) is internally provided with a coil (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021604333.2U CN212518579U (en) | 2020-08-05 | 2020-08-05 | Inner cooling structure of motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021604333.2U CN212518579U (en) | 2020-08-05 | 2020-08-05 | Inner cooling structure of motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212518579U true CN212518579U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021604333.2U Active CN212518579U (en) | 2020-08-05 | 2020-08-05 | Inner cooling structure of motor rotor |
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| CN (1) | CN212518579U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824230A (en) * | 2021-08-09 | 2021-12-21 | 东方电气集团东方电机有限公司 | Generator rotor cooling structure and use method thereof |
-
2020
- 2020-08-05 CN CN202021604333.2U patent/CN212518579U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824230A (en) * | 2021-08-09 | 2021-12-21 | 东方电气集团东方电机有限公司 | Generator rotor cooling structure and use method thereof |
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