定子结构及电机
By designing a connection between the liquid inlet channel and the cooling flow channel in the stator structure and using an oil guide ring to distribute the coolant, the problem of low coolant utilization in existing motors is solved, achieving a more efficient cooling effect and improved motor performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU AUTOMOBILE GROUP CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-17
AI Technical Summary
In existing oil-cooled motors, the cooling effect of the coolant on the stator windings is poor, the coolant utilization rate is low, resulting in high motor temperature and limiting the rated performance of the motor.
Design a stator structure including a stator core, stator windings and an oil guide ring. The liquid inlet channel is connected to the cooling channel. The coolant is distributed into the liquid inlet channel through the oil guide ring and flows out at both ends of the cooling channel, increasing the contact area between the coolant and the stator windings and improving the coolant utilization rate.
This improved the utilization rate and cooling effect of the coolant, reduced the temperature of the stator windings, enhanced the rated performance of the motor, and reduced the coolant flow requirement.
Smart Images
Figure CN224520783U_ABST
Abstract
Claims
1. A stator structure, characterized by, The application relates to a stator structure, comprising: a stator core, comprising a yoke part in a ring shape and a plurality of tooth parts distributed in a circumferential direction on an inner wall surface of the yoke part, a line slot being formed between two adjacent tooth parts, and a liquid inlet channel being arranged in the yoke part and being communicated with at least one end surface of the yoke part; a stator winding, arranged in the line slot, and a cooling flow channel being formed between the stator winding and a bottom of the line slot, the liquid inlet channel being communicated with the cooling flow channel, and cooling liquid being able to flow out from both ends of the cooling flow channel to cool end portions of the stator winding; an oil guide ring, fixed on an end portion of the stator core, the oil guide ring being provided with at least one oil inlet hole, at least one oil outlet hole and an oil cavity, the oil inlet hole and the oil outlet hole being respectively communicated with the oil cavity, and the oil outlet hole being communicated with the liquid inlet channel.
2. The stator structure of claim 1, wherein The liquid inlet channel is arranged on an outer side of the tooth part along a radial direction of the stator core.
3. The stator structure of claim 1, wherein The stator core comprises a middle part, a first side part and a second side part, the first side part and the second side part being respectively arranged on both sides of the middle part along an axial direction of the stator core, the liquid inlet channel comprises a first channel arranged on the first side part and a second channel arranged on the middle part, the first channel being arranged along the axial direction of the stator core, and the second channel being communicated with the first channel and the cooling flow channel.
4. The stator structure according to claim 3, wherein the first side part comprises at least one first punching sheet, the first punching sheet being provided with a first punching sheet slot and a first oil passage hole, and the first oil passage hole of the first punching sheet forming the first channel; the middle part comprises at least one second punching sheet, the second punching sheet being provided with a second punching sheet slot and an oil passage slot, one end of the oil passage slot being communicated with the second punching sheet slot, and the oil passage slot of at least one second punching sheet being communicated with the first oil passage hole to form the second channel; the second side part comprises at least one third punching sheet, the third punching sheet being provided with a third punching sheet slot; the first punching sheet slot, the second punching sheet slot and the third punching sheet slot are arranged on the same axis to form the cooling flow channel.
5. The stator structure according to claim 4, wherein the third punching sheet is further provided with a second oil passage hole, and the second oil passage hole is arranged on the same axis as the first oil passage hole; the middle part further comprises at least one fourth punching sheet, and at least one second punching sheet is arranged between the fourth punching sheet and the first punching sheet; the fourth punching sheet is provided with a fourth punching sheet slot, and the fourth punching sheet slot is arranged on the same axis as the first punching sheet slot, the second punching sheet slot and the third punching sheet slot.
6. The stator structure of claim 5, wherein The number of the second punching sheets is more than two, at least one second punching sheet is arranged between the fourth punching sheet and the third punching sheet, and the oil passage slot of at least one second punching sheet is communicated with the second oil passage hole; and the liquid inlet channel further comprises the second oil passage hole.
7. A stator structure according to claim 5 or 6, characterised in that The thickness of each second punching sheet and each fourth punching sheet ranges from 0.2 mm to 0.5 mm; and / or the number of the second punching sheets is 3-5, and the number of the fourth punching sheets is 1-3; and / or The axial length of the first side portion is equal to the axial length of the second side portion.
8. The stator structure of claim 4, wherein The liquid inlet channel further comprises a second oil passage hole, the second oil passage hole is arranged on the third punch, the second oil passage hole is on the same axis as the first oil passage hole, and the second oil passage hole is in communication with the oil passage groove.
9. The stator structure of claim 4, wherein The angle between the oil passage groove and the second punch groove is obtuse.
10. The stator structure of claim 1, wherein The oil guide ring comprises a ring body, the ring body is provided with the oil inlet hole, the oil outlet hole and the oil cavity, and the oil cavity is distributed circumferentially along the ring body. The oil inlet hole is configured to be connected with an external cooling liquid supply device, and the oil outlet hole is in communication with the liquid inlet channel. The number of oil outlet holes is multiple, and multiple oil outlet holes are distributed on the ring body.
11. The stator structure of claim 10, wherein The oil outlet hole is arranged on the side of the ring body close to the stator core, the oil inlet hole is arranged on the side of the ring body away from the stator core, and the oil inlet hole is arranged in a staggered manner with the oil outlet hole.
12. The stator structure of claim 11, wherein, The hole diameters of multiple oil outlet holes increase in turn from the direction close to the oil inlet hole to the direction away from the oil inlet hole.
13. The stator structure of claim 12, wherein, The number of oil inlet holes is multiple, multiple oil inlet holes are uniformly distributed on the ring body, and multiple oil outlet holes are uniformly distributed on the ring body.
14. The stator structure of claim 12, wherein, The ring body comprises a first arc segment and a second arc segment, the number of oil inlet holes is one, and the oil inlet hole is arranged on the first arc segment, and multiple oil outlet holes are uniformly distributed on the second arc segment.
15. An electric machine characterized by The stator structure as claimed in any one of claims 1-14 is arranged inside the housing, the rotor structure is arranged inside the stator structure, and the housing is provided with an oil discharge port at the bottom.