Wire outlet structure of high-power motor
The lead-out structure, which combines a conductive ring with a stator pressure ring, solves the problems of compact internal space and inter-pole wiring in high-power motors, achieving insulation protection and heat dissipation, extending the motor's service life, and simplifying the maintenance process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-31
AI Technical Summary
High-power motors have a compact internal space, making the stator leads prone to damage. The output ends are too long, the safety distance is too short, and the distance between the inter-pole connecting copper busbar and the stator coil is too close, resulting in severe heat generation and increased airflow resistance, which affects the service life of the motor and makes maintenance more difficult.
The outgoing line structure adopts a combination of conductive rings and stator pressure rings, with space left between the conductive rings. The insulation of the inter-pole connection points is ensured by the conductive ring fixing seat and the wrapping of insulating material, which reduces the air resistance of the air duct. Insulators are reserved at the outgoing line of the machine base for easy maintenance.
This design achieves a compact internal space for the motor, flexible wiring, avoids short circuits and overheating at the pole connection points, reduces airflow resistance, extends the motor's service life, and simplifies maintenance.
Smart Images
Figure CN224068468U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric motor technology, specifically to a lead-out structure for a high-power electric motor. Background Technology
[0002] With the improvement of the global economy and national economy, countries have continuously invested in the coal and ferrous and non-ferrous ore mining industries, which has led to the rapid development of large mining machinery.
[0003] In China, mining dump trucks are the main transportation tool for large open-pit mines. Among them, electric wheel trucks with a capacity of 150 tons or more are integrated products consisting of a high-power traction motor with forced ventilation and a reducer.
[0004] High-power traction motors have a compact internal space, and the stator is hammered when connecting the poles. This can easily damage the insulation at the stator leads, thus affecting the motor's service life.
[0005] In addition, there are:
[0006] 1. The motor output terminals are too long, the safety distance is too short, and it is difficult to output the three-phase leads;
[0007] 2. The distance between the inter-pole connecting copper busbar and the stator coil is too close, which is not conducive to insulation protection and causes severe overheating at the output end;
[0008] 3. The copper busbar connecting the poles is located at the end of the coil, which increases the air resistance inside the motor and hinders ventilation and heat dissipation. Summary of the Invention
[0009] The present invention aims to solve the technical problems mentioned in the background section above, and provides a high-power motor output structure with a compact and reasonable internal structure, good heat dissipation, and extended motor service life.
[0010] To achieve the above objectives, the technical solution provided by this utility model is as follows: a high-power motor output structure, including a stator core and a frame, wherein the stator core is heat-fitted inside the frame and then fastened by multiple screws, the two sides of the stator core are fastened by stator pressure ring I and stator pressure ring II, the outer side of stator pressure ring I contacts the inner cylinder groove of the frame, an axial fixing ring is provided on the outer side of stator pressure ring I, the axial fixing ring is fully welded to the mating surface of the stator core, the effective edge of the stator coil is embedded in the stator core groove, a conductive ring is provided at the protruding end of the stator coil, the inter-pole connection point of the U-phase ring, V-phase ring, W-phase ring and N-phase ring of the conductive ring is connected to the slip ring, the parallel conductive rings are tightly plugged with industrial felt and then firmly fixed to the conductive ring fixing seat with alkali-free glass fiber tape, multiple evenly distributed conductive ring fixing seats are installed on the end face of stator pressure ring I, the conductive rings are fixedly connected to the conductive ring fixing seats, and the conductive ring fixing seats are closed inside the frame.
[0011] In some embodiments, the two ends extending from the stator coil are stator coil end I and stator coil end II, respectively. Stator coil end I and stator coil end II extend from the stator core at the same length, and both are tightly fixed to the stator coil with polyester sheaths. The bent parts of the stator coil ends are insulated by cross binding with industrial felt or glass fiber rope. A conductive ring is provided on the outside of stator coil end I.
[0012] In some embodiments, there are six conductive ring fixing seats, which are evenly installed on the circumferential end face of the stator pressure ring I.
[0013] In some embodiments, the U-phase ring, V-phase ring and W-phase ring of the conductive ring are respectively provided with lead-out copper busbars, which are firmly welded to their respective phase rings with silver-copper solder.
[0014] In some embodiments, a U-phase ring, a V-phase ring, a W-phase ring, and an N-neutral ring are arranged sequentially from top to bottom on the conductive ring holder. The parallel conductive rings are tightly packed together with industrial felt and then securely fixed to the conductive ring holder with alkali-free glass fiber tape.
[0015] In some embodiments, the conductive ring holder is fastened to the base by bolts, and anaerobic adhesive is applied to the bolts and / or threads.
[0016] In some embodiments, a bolt is placed in the T-shaped opening on the base for the outgoing line, and the bolt is used to connect the insulator to the varnish-impregnated insulator. The insulator is then connected to the lead-out copper busbar by the bolt.
[0017] In some embodiments, except for the inter-electrode connection points of the conductive rings, the U-phase ring, V-phase ring, and W-phase ring are first half-overlapped three times with polyimide film self-adhesive tape, then half-overlapped three times with silicone glass mica tape, and finally half-overlapped once with alkali-free tape.
[0018] In some embodiments, after the inter-electrode connection of the conductive ring, the connection point is first wrapped twice with silicone glass mica tape, then wrapped once with alkali-free tape, and finally covered with silicone rubber fiberglass tubing, folded back onto the conductive ring, and securely tied together with the conductive ring.
[0019] The advantages of this utility model compared with the prior art are: the internal space of the motor is compact and the wiring is flexible; it is fixed by the conductive ring and the fixing seat that is evenly distributed in a circle on the stator pressure ring, and the space between the conductive rings reduces the air resistance of the internal air duct of the motor and avoids short circuits and overheating at the pole connection point; moreover, the mounting bolts at the outlet of the frame are reserved for connection with the insulator, which solves the problem of difficult maintenance, facilitates maintenance, and thus extends the service life of the motor.
[0020] The above advantages also solve the following problems: 1. The motor output wires are too long, the safety distance is too short, and it is difficult to output three-phase leads; 2. The distance between the inter-pole connecting copper busbar and the stator coil is too close, which is not conducive to insulation protection and causes serious overheating at the output wire end; 3. The inter-pole connecting copper busbar is located at the end of the coil, which increases the air resistance of the motor's internal air duct and hinders ventilation and heat dissipation.
[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0022] Figure 1 This is a schematic cross-sectional view of the stator portion according to an embodiment of the present utility model;
[0023] Figure 2 for Figure 1 A schematic cross-sectional view of the stator AA shown in the figure;
[0024] Figure 3 for Figure 1 A schematic cross-sectional view of the stator CC shown in the figure;
[0025] Figure 4 for Figure 1 A cross-sectional view of the stator BB shown in the figure;
[0026] Figure 5 This is a schematic cross-sectional view of the stator lamination groove in an embodiment of the present invention.
[0027] In the attached diagram: 1. Stator core; 2. Temperature sensing element; 3. End clamp; 4. Polyester-glass rope; 5. Stator coil; 6. Polyester sleeve; 7. Alkali-free glass fiber tape; 8. Lead-out copper busbar U; 9. Lead-out copper busbar V; 10. Lead-out copper busbar W; 11. Outlet sleeve; 12. Bolt; 13. Spring washer; 14. Conductive ring U; 15. Conductive ring V; 16. Conductive ring W; 17. Neutral point ring; 18. Conductive ring fixing seat; 19. Polyimide film; 20. Mica tape; 21. Alkali-free tape; 22. Glass fiber flexible hose; 23. Industrial felt; 24. Slot bottom insulation; 25. Interlayer insulation; 26. Composite material; 27. Stator slot wedge; 28. Screw; 29. Insulator; 30. Stator coil end I; 31. Stator coil end II. Detailed Implementation
[0028] The present invention will now be described in further detail.
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.
[0030] A wiring structure for a high-power electric motor, such as Figure 5 As shown, the stator core 1 is formed by stacking stator laminations, and is fastened on both sides by stator pressure ring I and stator pressure ring II. The bottom of the stator lamination slot is provided with a 0.5mm epoxy glass cloth plate and a 0.2mm composite material 6650. The end of the stator lamination slot is provided with a stator slot wedge 27. A 0.5mm epoxy glass cloth plate and a 1.0mm epoxy glass cloth plate are provided between the upper and lower windings for insulation.
[0031] Combination Figure 1 , Figure 2 As shown, the stator core 1 is heat-fitted inside the machine base and then fastened by multiple screws 28. The outer side of the stator pressure ring I contacts the inner cylinder groove of the machine base. An axial fixing ring is provided on the outer side of the stator pressure ring I, and the axial fixing ring is fully welded to the mating surface of the machine base core.
[0032] like Figure 2 As shown, the effective side of the stator coil 5 is embedded in the slot of the stator core 1. The two ends of the stator coil 5 that extend out are stator coil end I 30 and stator coil end II 31, respectively. Stator coil end I 30 and stator coil end II 31 extend out of the stator core 1 at the same length, and both end clamps 3 are tightly wrapped and fixed to the stator coil 5 with polyester sheaths. The bent ends of the stator coil 5 are insulated by cross binding with industrial felt 23 or glass fiber rope.
[0033] Combination Figure 4 As shown, a conductive ring is provided on the outer side of the stator coil end I 30. The conductive ring fixing seat 18 is installed on the end of the stator pressure ring I. There are 6 conductive ring fixing seats 18 in total, which are evenly installed on the circumferential end face of the stator pressure ring I.
[0034] The stator conductive rings consist of a U-phase ring, a V-phase ring, a W-phase ring, and an N-neutral ring. Conductor rings U14, V15, and W16 are each equipped with lead-out copper busbars, which are firmly welded to their respective phase rings using silver-copper solder.
[0035] The three-phase rings U14, V15 and W16 are first wrapped with insulation according to the insulation specifications (except for the inter-electrode connection points). First, they are wrapped three times with polyimide film 19 self-adhesive tape in half-overlap, then wrapped three times with organosilicon glass mica tape 20 in half-overlap, and finally wrapped once with alkali-free tape 21 in half-overlap.
[0036] After the inter-electrode connection is completed, the inter-electrode connection point is insulated according to the inter-turn insulation specification. First, wrap it twice with silicone glass mica tape 20, then wrap it once with alkali-free tape 21, and finally put on silicone rubber glass fiber tubing 22 and fold it back onto the conductive ring, and tie it securely together with the conductive ring.
[0037] At the inter-electrode connection point, the conductive ring fixing seat 18 is arranged from top to bottom with U-phase ring, V-phase ring, W-phase ring and N-neutral ring, and the parallel rings are tightly plugged with industrial felt 23, and then firmly fixed to the conductive ring fixing seat 18 with alkali-free glass fiber tape 7. Finally, anaerobic adhesive is applied to the machine base threads, and the conductive ring fixing seat 18 is fixed to the machine base with bolts 12, for a total of six locations.
[0038] Combination Figure 3 As shown, a bolt 12 is placed inside the T-shaped outlet of the base, and the bolt 12 is used to connect the insulator 29 after it has been impregnated with varnish. The insulator 29 is then connected to the lead-out copper busbar by the bolt 12, which facilitates disassembly and maintenance in the future.
[0039] The above design structure allows for a compact internal space and flexible wiring. The conductive rings are fixed to the stator pressure rings by evenly distributed mounting brackets on the circumference. The space between the conductive rings reduces air resistance in the motor's internal airflow, avoids short circuits and overheating at the pole connection points, and facilitates maintenance, thereby extending the motor's service life.
[0040] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A large power motor outlet structure, characterized in that: The application relates to a stator core (1) and a machine base, the stator core (1) is shrink-fitted in the machine base and is fastened by a plurality of screws (28), the stator core (1) is fastened by a stator pressing ring I and a stator pressing ring II on two sides, the outer side of the stator pressing ring I is in contact with a clamping groove in the machine base inner cylinder, an axial fixing ring is arranged on the outer side of the stator pressing ring I, the axial fixing ring is full-welded with the cooperation surface of the stator core (1), the effective edge of a stator coil (5) is embedded in the slot of the stator core (1), the end part of the stator coil (5) is provided with a conductive ring, the inter-pole connecting points of the U-phase ring, the V-phase ring, the W-phase ring and the N-phase ring of the conductive ring are connected with the current collector ring, the conductive rings in parallel are tightly filled with industrial felt (23), and the conductive rings are tightly fixed on the conductive ring fixing seat (18) by a non-alkali glass fiber belt (7), a plurality of conductive ring fixing seats (18) are evenly arranged on the end surface of the stator pressing ring I, the conductive ring is fixedly connected to the conductive ring fixing seat (18), and the conductive ring fixing seat (18) is combined in the machine base.
2. The outgoing line structure of a high-power motor according to claim 1, characterized in that: The end parts of the stator coil (5) extending out of the stator core (1) are a stator coil end part I (30) and a stator coil end part II (31) respectively, the stator coil end part I (30) and the stator coil end part II (31) are equal in length and extend out of the stator core (1), the end hoop (3) is tightly fixed on the stator coil (5) by a polyester sheath, the end part of the stator coil (5) is insulated by industrial felt (23) or glass silk rope cross binding at the bending position, and the outer side of the stator coil end part I (30) is provided with a conductive ring.
3. The outgoing line structure of a high-power motor according to claim 1, characterized in that: The conductive ring fixing seat (18) is provided with six conductive rings, and the six conductive rings are evenly arranged on the circumferential end surface of the stator pressing ring I.
4. The outlet structure of a high-power motor according to claim 1, characterized in that: The U-phase ring, the V-phase ring and the W-phase ring of the conductive ring are respectively provided with a copper bar, and the copper bar is firmly welded with the corresponding ring by silver copper solder.
5. The outlet structure of a high-power motor according to claim 1, characterized in that: The U-phase ring, the V-phase ring, the W-phase ring and the N neutral ring are arranged on the conductive ring fixing seat (18) from top to bottom in sequence, the conductive rings in parallel are tightly filled with industrial felt (23), and the conductive rings are tightly fixed on the conductive ring fixing seat (18) by a non-alkali glass fiber belt (7).
6. The outlet structure of a high-power motor according to claim 1, characterized in that: The conductive ring fixing seat (18) is combined on the machine base by a bolt (12), and the bolt (12) and / or the threaded part are coated with anaerobic glue.
7. The outlet structure of a high-power motor according to claim 4, characterized in that: A bolt (12) is arranged in a T-shaped port for outgoing wire on the machine base, the bolt (12) is combined with a dipped insulator (29), and the insulator (29) is combined with the copper bar by the bolt (12).
8. The outlet structure of a high-power motor according to claim 1, characterized in that: The inter-pole connecting points of the conductive ring are wrapped by a polyimide film (19) for three times, then wrapped by organic silicon glass mica tape (20) for three times, and finally wrapped by a non-alkali tape (21) for one time.
9. The outlet structure of a high-power motor according to claim 1, characterized in that: After the inter-pole connecting points of the conductive ring are connected, the inter-pole connecting points are wrapped by the organic silicon glass mica tape (20) for two times, then wrapped by the non-alkali tape (21) for one time, and finally wrapped by a silicon rubber glass fiber hose (22) which is reversely folded on the conductive ring and is tightly bound with the conductive ring.