Cooling structure based on disc type motor

Abstract

The invention relates to a cooling structure based on a disc type motor. The end cover comprises an inner side end face and an outer side end face which are oppositely arranged, the outer side end face is provided with waterproof convex ribs and connecting convex ribs, the height of the connecting convex ribs along the outer side end face is larger than that of the waterproof convex ribs, a water tank structure is formed in the outer side end face through the multiple waterproof convex ribs, and the connecting convex ribs are arranged in the water tank structure. A first connecting hole penetrating to the inner side end surface is formed in the connecting convex rib; the water channel cover plate is connected with the outer side end face and provided with hollow grooves matched with the connecting convex ribs in an embedded mode, and a cooling water channel allowing cooling liquid to flow through is formed between the water channel cover plate and the water channel structure; the stator iron core is installed on the inner side end face, and radial through holes extending in the radial direction are distributed in the circumferential direction of the stator iron core; the connecting piece is in a long strip shape, the connecting piece is arranged in the radial through hole in a penetrating mode in the radial direction, and a second connecting hole matched with the first connecting hole is formed in the connecting piece. According to the invention, the problem of leakage or water leakage at the end cover caused by welding defects is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of disc motors, and in particular to a cooling structure based on a disc motor. Background Art

[0002] Disc motors, due to their compact size, high torque density, and fast response speed, have been widely used in industrial motors and marine propulsion systems in recent years. Since disc motors typically utilize a flat structure, the assembly of their front and rear end covers and stator significantly impacts their overall heat dissipation performance and mechanical strength.

[0003] Existing disc motors often use friction welding to connect the front and rear end covers to the stator ends. To ensure a compact structure, most welds are performed within the motor's internal cavity. However, as motor output power increases and stator size grows, the required weld depth for the front and rear end covers increases, requiring a corresponding increase in the length of the friction welding head. Limited by the internal mounting space of the end covers, this type of welded structure often suffers from positioning difficulties, weld deformation, and unstable joint strength. This makes weld quality difficult to guarantee, leading to a decrease in the overall machine yield rate and compromising product consistency and stability. Summary of the Invention

[0004] To this end, the present invention provides a cooling structure based on a disc motor. By redesigning the matching structure of the end cover, stator core and water channel cover, the problem of leakage or water leakage at the end cover caused by welding defects is avoided, and the overall sealing performance and reliability of the motor are significantly improved.

[0005] To solve the above technical problems, the present invention provides a cooling structure based on a disc motor, comprising: The end cap includes an inner end face and an outer end face that are oppositely disposed, the outer end face being provided with a water-blocking rib and a connecting rib, the connecting rib being higher along the outer end face than the water-blocking rib, the plurality of water-blocking ribs forming a water trough structure on the outer end face, the connecting rib being disposed in the water trough structure, and the connecting rib being provided with a first connecting hole that extends through the inner end face; A water channel cover plate is connected to the outer end surface and is provided with a hollow groove that fits with the connecting rib, and a cooling water channel for the coolant to flow through is formed between the water channel cover plate and the water trough structure; A stator core is mounted on the inner end surface, and has radial through holes extending radially distributed along the circumference of the stator core; The connecting piece is in the shape of an elongated strip and is radially inserted into the radial through hole and is provided with a second connecting hole which is matched with the first connecting hole.

[0006] In one embodiment of the present invention, the connecting piece is a structure with a T-shaped cross section.

[0007] In one embodiment of the present invention, the connecting member is further provided with end connecting holes located on both sides of the second connecting hole, the two ends of the connecting member extend out of the two ends of the radial through hole and are respectively provided with the end connecting holes, the stator core is provided with a first connecting through hole corresponding to the second connecting hole, and the end cover is provided with a second connecting through hole corresponding to each of the end connecting holes.

[0008] In one embodiment of the present invention, both the second connection hole and the end connection hole are threaded holes.

[0009] In one embodiment of the present invention, the width of the connecting rib is greater than the width of the water-blocking rib.

[0010] In one embodiment of the present invention, the hollow groove is a waist-shaped groove, and a plurality of the hollow grooves are distributed at intervals in the circumferential direction around the center of the water channel cover plate.

[0011] In one embodiment of the present invention, the water channel cover plate and the end cover are connected by friction welding.

[0012] In one embodiment of the present invention, a weight-reducing blind groove is distributed on the surface of the water channel cover plate facing away from the outer end surface, and a plurality of the weight-reducing blind grooves are distributed at intervals in the circumferential direction around the center of the water channel cover plate.

[0013] In one embodiment of the present invention, the cooling water channel includes a plurality of circular water channels that are radial and connected end to end.

[0014] In one embodiment of the present invention, the outer end surface of the end cover is provided with heat dissipation ribs located in each of the circular water channels, and the heat dissipation ribs follow the shape of the circular water channels.

[0015] The above technical solution of the present invention has the following advantages over the prior art: The cooling structure for a disc motor described in the present invention arranges the cooling water path integrally on the outer end face of the end cap, avoiding the defects of traditional internal water cavity structures that are limited by installation space and prone to water leakage. This ensures that water leakage inside the motor due to poor friction welding will not occur, and the coolant no longer directly contacts the internal area of ​​the motor's core components, effectively avoiding the risk of leakage caused by friction welding defects and improving the motor's sealing and operational reliability. In addition, the external cooling water path welding can also use a shorter friction welding head, reducing the risk of head breakage and improving the friction welding yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the cooling structure based on the disc motor.

[0018] Figure 2 It is a structural schematic diagram of the end cover of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the connecting piece of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the waterway cover plate of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the stator core of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the stator core and the end cover of the present invention.

[0023] Figure 7 It is a structural schematic diagram of the cooling water circuit of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the rotor assembly of the present invention.

[0025] Description of the accompanying drawings: 1. End cap; 11. Inner end surface; 12. Outer end surface; 13. Water barrier rib; 14. Connecting rib; 141. First connecting hole; 15. Sink structure; 2. Waterway cover; 21. Hollow groove; 22. Weight reduction blind groove; 3. Sink structure; 4. Cooling water channel; 41. Circular water channel; 42. Heat dissipation ribs; 5. stator core; 51. radial through hole; 6. Connecting piece; 61. Second connecting hole; 62. End connecting hole; 7. Rotor assembly; 71. Rotating shaft; 72. Rotor disk. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0027] In the present invention, if there is a description of direction (up, down, left, right, front and back), it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0028] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0029] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figure 1 、 Figure 2 、 Figure 6 As shown, a cooling structure based on a disc motor of the present invention includes: The end cap 1 includes an inner end surface 11 and an outer end surface 12 disposed opposite each other. The outer end surface 12 is provided with a water-blocking rib 13 and a connecting rib 14. The height of the connecting rib 14 along the outer end surface 12 is higher than the height of the water-blocking rib 13. The plurality of water-blocking ribs 13 form a water trough structure 3 on the outer end surface 12. The connecting rib 14 is disposed in the water trough structure 3 and is provided with a first connecting hole 141 extending through the inner end surface 11. The water channel cover plate 2 is connected to the outer end surface 12 and is provided with a hollow groove 21 that fits with the connecting rib 14. A cooling water channel 4 for the coolant to flow through is formed between the water channel cover plate 2 and the water trough structure 3; The stator core 5 is mounted on the inner end surface 11 , and radial through holes 51 extending radially are distributed along the circumference of the stator core 5 ; The connecting member 6 is in the shape of an elongated strip. The connecting member 6 is radially inserted into the radial through hole 51 and is provided with a second connecting hole 61 that is fitted with the first connecting hole 141 .

[0031] This arrangement places cooling water channel 4 entirely on the outer end surface 12 of end cap 1, avoiding the limitations of conventional internal water chamber structures, which are limited by installation space and prone to water leakage. This prevents water leaks from the motor due to poor friction welding, and eliminates direct contact between the coolant and the interior of the motor's core components, effectively avoiding the risk of leakage caused by friction welding defects and improving the motor's sealing and operational reliability.

[0032] In addition, a shorter friction welding head can be used for welding the external cooling water channel 4, thereby reducing the risk of the welding head breaking and improving the yield rate of friction welding.

[0033] In one embodiment, referring to Figure 3 As shown, the connecting member 6 has a T-shaped cross section.

[0034] In one embodiment, the connector 6 is further provided with end connection holes 62 located on both sides of the second connection hole 61. The two ends of the connector 6 extend beyond the two ends of the radial through hole 51 and are respectively provided with the end connection holes 62. The stator core 5 is provided with first connection holes corresponding to the second connection holes 61 at the positions of the radial through hole 51, and the end cover 1 is provided with second connection holes corresponding to each of the end connection holes 62. The multiple connection points can effectively prevent the connector 6 from shifting or loosening during motor operation, improve the connection stability between the stator core 5 and the end cover 1, and ensure coaxiality and structural strength during assembly.

[0035] In one embodiment, the second connection hole 61 and the end connection hole 62 are threaded holes, enabling reliable connection with fasteners such as bolts. Compared to welding or riveting, threaded connections offer advantages such as detachability, repeatable assembly, and strong locking force.

[0036] In one embodiment, the width of the connecting rib 14 is greater than that of the water-blocking rib 13. This width is greater than that of the water-blocking rib 13. As the primary load-bearing element of the structure, increasing its width enhances its overall mechanical strength. Water-blocking rib 13, on the other hand, primarily serves to guide and separate cooling channels. Using a smaller size saves material while increasing the channel volume and improving coolant flow capacity, achieving a balanced optimization of structural strength and heat dissipation performance.

[0037] In one embodiment, referring to Figure 4As shown, the hollow groove 21 is a waist-shaped groove, and multiple waist-shaped grooves are distributed circumferentially around the center of the water channel cover plate 2. The hollow groove 21 is used to fix the radial angle between the end cover 1 and the water channel cover plate 2, preventing the ribs on the water channel cover plate 2 from blocking the cooling water channel 4 on the end cover 1. At the same time, it has good circumferential matching and stress buffering capacity, making the fit between the cover plate and the ribs tighter and more stable, and preventing flow channel leakage caused by assembly deviation. At the same time, multiple waist-shaped grooves are evenly distributed circumferentially around the center of the cover plate, which helps to achieve uniform distribution and flow of the coolant, thereby improving the overall heat exchange efficiency.

[0038] In one embodiment, the water channel cover plate 2 is connected to the end cover 1 by friction welding to form a sealed cooling water channel 4.

[0039] In one embodiment, referring to Figure 4 As shown, the waterway cover plate 2 has weight-reducing blind grooves 22 distributed on the side facing away from the outer end surface 12. Multiple weight-reducing blind grooves 22 are spaced circumferentially around the center of the waterway cover plate 2. This design effectively reduces the weight of the waterway cover plate 2 without significantly reducing structural strength, contributing to the overall lightweight design requirements of the motor. Furthermore, the weight-reducing blind grooves 22 increase the surface area, forming a localized convection cavity and improving the heat radiation and convection efficiency of the cooling structure.

[0040] In one embodiment, referring to Figure 7 As shown, the cooling water channel 4 includes multiple radially connected annular water channels 41. This allows the coolant to flow evenly over a large area outside the end cover 1, improving the overall heat dissipation area and heat transfer efficiency, and is particularly suitable for the isothermal control requirements of large-diameter disc motor structures.

[0041] Specifically, the outer end surface 12 of the end cap 1 is provided with heat dissipation ribs 42 located within each of the annular water channels 41. These ribs 42 conform to the annular water channels 41. This facilitates the rapid transfer of heat from the cooling water channels 4 to the coolant, improving heat exchange efficiency. Furthermore, the heat dissipation ribs 42 enhance the structural rigidity of the outer side of the end cap 1, preventing deformation due to thermal expansion and contraction during operation and ensuring housing stability.

[0042] It can be understood that the disc motor includes two end covers 1 and a rotor assembly 7 disposed between the two end covers 1. Figure 8 As shown, the rotor assembly 7 includes a rotating shaft 71 rotatably connected between the two end covers 1 and a rotor disk 72 connected to the rotating shaft 71. The rotor disk 72 is circumferentially inlaid with magnetic steel. The stator assembly includes a winding wound around the stator core 5. The stator core 5 in the two end covers 1 is respectively arranged on both axial sides of the rotor disk 72 to form a gap between the stator core 5 and the rotor disk 72 to accommodate the rotating rotor disk 72.

[0043] In addition, the cooling water channel 4 is provided with a water inlet and a water outlet (not shown in the figure) corresponding to the two end covers 1, the water outlet is connected to the water inlet, and the water inlet and the water outlet are respectively connected to external water pipes.

[0044] The cooling water path 4 of traditional disc motors mostly adopts an embedded structure arranged in the inner cavity of the end cover 1. Although this structure is compact, due to the limited internal space, it is easily restricted by factors such as the stator size, rotor installation and winding arrangement during the installation and welding of the end cover 1, resulting in a tight structural layout and complex processing and assembly. In addition, in the internal welding structure, the friction welding position is close to the internal sealing surface of the motor. When the welding quality is unstable, microcracks or unfused defects are formed in the weld, it is very easy for the coolant to penetrate into the interior of the motor through the weld path, causing problems such as moisture in the winding and insulation damage. The present invention moves the cooling water channel to the outside of the end cover 1, making the cooling water path 4 completely independent of the internal structure of the motor, thereby significantly improving the flexibility of the overall layout and the adaptability of the manufacturing process. The present invention sets the friction welding part on the outside of the end cover 1, which is completely isolated from the core components of the motor. Even if welding defects occur, they will not directly affect the internal sealing performance of the motor, fundamentally avoiding the risk of leakage or failure caused by welding defects, and greatly improving the reliability of the product. After the welding structure is arranged on the outside of the end cover 1, a shorter friction welding head can be used to complete the connection operation, which can maintain higher welding stability and contact consistency during the welding process, effectively reduce the possibility of welding head breakage, and improve the consistency and strength of the weld joint.

[0045] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A cooling structure based on a disc motor, characterized in that: include: An end cover (1) comprises an inner end face (11) and an outer end face (12) arranged opposite to each other, the outer end face (12) being provided with a water-blocking rib (13) and a connecting rib (14), the height of the connecting rib (14) along the outer end face (12) being higher than the height of the water-blocking rib (13), a plurality of the water-blocking ribs (13) forming a water trough structure (3) on the outer end face (12), the connecting rib (14) being arranged in the water trough structure (3), and the connecting rib (14) being provided with a first connecting hole (141) penetrating to the inner end face (11); A water channel cover plate (2) is connected to the outer end surface (12) and is provided with a hollow groove (21) that is engaged with the connecting rib (14); a cooling water channel (4) for coolant to flow through is formed between the water channel cover plate (2) and the water channel structure (3); A stator core (5) is mounted on the inner end surface (11), and radial through holes (51) extending radially are distributed along the circumference of the stator core (5); The connecting piece (6) is in the shape of an elongated strip. The connecting piece (6) is radially inserted into the radial through hole (51) and is provided with a second connecting hole (61) that is mounted in cooperation with the first connecting hole (141).

2. A cooling structure based on a disk motor according to claim 1, characterized in that: The connecting piece (6) is a structure with a T-shaped cross section.

3. The cooling structure based on a disk motor according to claim 1, characterized in that: The connecting member (6) is further provided with end connecting holes (62) located on both sides of the second connecting hole (61); both ends of the connecting member (6) extend out of the two ends of the radial through hole (51) and are respectively provided with the end connecting holes (62); the stator core (5) is provided with a first connecting through hole corresponding to the second connecting hole (61); and the end cover (1) is provided with a second connecting through hole corresponding to each of the end connecting holes (62).

4. The cooling structure based on a disk motor according to claim 3, characterized in that: The second connecting hole (61) and the end connecting hole (62) are both threaded holes.

5. The cooling structure based on a disk motor according to claim 1, characterized in that: The width of the connecting rib (14) is greater than the width of the water-isolating rib (13).

6. The cooling structure based on a disk motor according to claim 1, characterized in that: The hollow grooves (21) are waist-shaped grooves, and a plurality of the hollow grooves are distributed at intervals in the circumferential direction around the center of the waterway cover plate (2).

7. The cooling structure based on a disk motor according to claim 1, characterized in that: The water channel cover plate (2) and the end cover (1) are connected by friction welding.

8. The cooling structure based on a disk motor according to claim 1, characterized in that: A weight-reducing blind groove (22) is distributed on the side of the waterway cover plate (2) facing away from the outer end surface (12), and a plurality of the weight-reducing blind grooves (22) are distributed at intervals in the circumferential direction around the center of the waterway cover plate (2).

9. The cooling structure based on a disk motor according to claim 1, characterized in that: The cooling water channel (4) comprises a plurality of circular water channels (41) that are radial and connected end to end.

10. The cooling structure based on a disk motor according to claim 9, characterized in that: The outer end surface (12) of the end cover (1) is provided with heat dissipation ribs (42) located in each of the annular water channels (41), and the heat dissipation ribs (42) follow the shape of the annular water channels (41).

Images