Motor with double heat dissipation structures

Abstract

The utility model discloses a motor with a dual heat dissipation structure, which comprises a motor shell, a front end cover, a rear end cover, a stator, a rotor core and a rotating shaft, the motor shell comprises an outer shell and an inner shell, a first cavity is formed between the outer shell and the inner shell, a plurality of annular baffles are arranged between the outer shell and the inner shell, and the inner shell is provided with a plurality of radiating fins. A plurality of annular baffles are arranged in the first cavity and divide the first cavity into a plurality of annular cavities, communicating grooves are formed in the annular baffles and used for communicating the adjacent annular cavities, an inflow pipe and an outflow pipe are arranged on the outer side of the outer shell, the inflow pipe communicates with the annular cavity in the leftmost end of the motor shell, and the outflow pipe communicates with the annular cavity in the leftmost end of the motor shell. The flow outlet pipe is communicated with the annular cavity in the rightmost end of the motor shell, the part, located on the inner side of the motor shell, of the rotating shaft is connected with a cooling fan structure, the front end cover is provided with a first air outlet hole, and the rear end cover is provided with a first air inlet hole. According to the scheme, a dual-heat-dissipation structure is arranged, so that the heat dissipation effect of the motor can be further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a motor with a dual heat dissipation structure. Background Art

[0002] In recent years, with the continuous development of the motor industry, motor manufacturing enterprises have been constantly pursuing small volume and high power density. In motor design, materials with high electromagnetic load and thermal load are increasingly used. The losses generated during motor operation increase, resulting in too high overall temperature rise or local temperature rise of the motor. This will not only reduce the service life of the motor, affect the economic and technical indicators such as the efficiency and torque of the motor, but also cause serious deformation of the motor structural components, endangering the safe operation of the motor.

[0003] Chinese Patent with application number 2023207720281 discloses an efficient motor heat dissipation structure, including a housing and a filtering component. An internal slot is opened in the housing, and a cooling water pipe is arranged in the internal slot. The cooling water pipe is installed in a spiral shape inside the internal slot, and the cooling water pipe is fixedly connected to the inner wall of the internal slot. One end of one side of the housing is fixedly connected with an inlet interface, and the other end of the other side of the housing is fixedly connected with an outlet interface.

[0004] The above solution is to dissipate heat from the permanent magnet motor by arranging a spiral cooling water pipe in the water-cooled housing and injecting cooling water into the cooling water pipe to improve the heat dissipation effect. However, the defect of this method and the prior art is that both dissipate heat through a single heat dissipation structure, and both play a role in dissipating the high temperature inside the motor from the outside. The heat dissipation effect of this method is limited and cannot quickly and effectively dissipate the temperature inside the motor. Summary of the Utility Model

[0005] To solve the above problems, the utility model provides a motor with a dual heat dissipation structure, including a motor housing, a front end cover, a rear end cover, a stator, a rotor core and a rotating shaft. The front end cover and the rear end cover are installed at the front and rear ends of the motor housing. The rotating shaft is rotatably arranged inside the motor housing. A rotor core is arranged on the outer side of the middle of the rotating shaft, and a stator is arranged on the outer side of the rotor core. The motor housing includes an outer housing and an inner housing. A first cavity is formed between the outer housing and the inner housing. A plurality of annular baffles are arranged between the outer housing and the inner housing. The plurality of annular baffles divide the first cavity into a plurality of annular chambers. Communication grooves are arranged on the annular baffles for communicating adjacent annular chambers. An inlet pipe and an outlet pipe are arranged on the outer side of the outer housing. The inlet pipe is communicated with the annular chamber at the leftmost end inside the motor housing, and the outlet pipe is communicated with the annular chamber at the rightmost end inside the motor housing. A heat dissipation fan structure is connected to the part of the rotating shaft inside the motor housing. A first air outlet hole is arranged on the front end cover, and a first air inlet hole is arranged on the rear end cover. Filter meshes are arranged on both the first air outlet hole and the first air inlet hole.

[0006] Preferably, the heat dissipation fan structure is disposed outside the rotating shaft. A second cavity is provided inside the rotating shaft. The axial length of the second cavity is greater than the axial length of the rotor core. A second air outlet hole and a second air inlet hole are respectively provided at both ends of the second cavity.

[0007] Preferably, a second cavity is provided inside the rotating shaft. The axial length of the second cavity is greater than the axial length of the rotor core. A second air outlet hole and a second air inlet hole are respectively provided at both ends of the second cavity. The heat dissipation fan structure is disposed in the second cavity.

[0008] Preferably, the heat dissipation fan structure includes a support frame which is connected to the side wall of the second cavity. A support seat is installed on the support frame. A first spiral blade and a second spiral blade are provided on the support seat.

[0009] Preferably, the heat dissipation fan structure includes a strip-shaped blade. The middle of the blade is twisted into a spiral structure. The second cavity is cylindrical. The width of the blade is the same as the diameter of the second cavity and the edges of the blade are all connected to the side wall of the second cavity.

[0010] The advantages of the present utility model are as follows:

[0011] 1. In this solution, a dual heat dissipation structure is provided. By combining liquid cooling and air cooling, the dual heat dissipation structure can more comprehensively cover all parts of the motor, improving the heat dissipation efficiency. Liquid cooling can effectively absorb and carry away the heat generated by the motor housing, while air cooling further helps to disperse the heat inside the motor, which can effectively reduce the temperature of the motor during operation, reduce material aging and performance degradation caused by high temperature, and thus extend the service life of the motor.

[0012] 2. In this solution, by dividing the first cavity into multiple annular chambers, the contact area between the cooling liquid and the motor housing is increased, thereby improving the heat exchange efficiency. The cooling liquid can more effectively absorb the heat generated during the operation of the motor and quickly carry away the heat through circulating flow. The design of the annular chambers enables the cooling liquid to be evenly distributed around the motor housing, avoiding the phenomenon of local overheating.

[0013] 3. In this solution, an air-cooling cycle is also formed inside the rotating shaft, forming an additional air-cooling cycle. The combination of this internal air cooling and external air cooling achieves a more comprehensive and efficient heat dissipation effect, which helps to further reduce the temperature inside the motor. Description of the Drawings

[0014] Figure 1 It is a sectional view of the motor of the present utility model.

[0015] Figure 2 It is a three-dimensional structure diagram of the motor of the present utility model.

[0016] Figure 3 This is the exploded view of the motor housing of the present utility model.

[0017] Figure 4 This is the structure diagram of the rotating shaft in Embodiment 2 of the present utility model.

[0018] Figure 5 This is the structure diagram of the cooling fan in Embodiment 2 of the present utility model.

[0019] Figure 6 This is the structure diagram of the cooling fan in Embodiment 3 of the present utility model.

[0020] In the figure: 1 motor housing, 2 front end cover, 3 rear end cover, 4 stator, 5 rotor core, 6 rotating shaft, 7 outer housing, 8 inner housing, 9 annular baffle, 10 annular chamber, 11 communication groove, 12 inlet pipe, 13 outlet pipe, 14 first air outlet hole, 15 first air inlet hole, 16 filter screen, 17 second cavity, 18 second air outlet hole, 19 second air inlet hole, 20 fan blade, 21 support frame, 22 support seat, 23 first spiral blade, 24 second spiral blade, 25 blade plate. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. At the same time, when an element is referred to as "fixed to" or "provided on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is referred to as "fixedly connected to" another element, it can adopt common fixed connection methods such as welding, bolt connection, or glue connection. In short, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] Embodiment 1, as Figure 1-3 shown, a motor with a dual heat dissipation structure includes a motor housing 1, a front end cover 2, a rear end cover 3, a stator 4, a rotor core 5, and a rotating shaft 6. The front end cover 2 and the rear end are installed at the front and rear ends of the motor housing 1. The rotating shaft 6 is rotatably arranged inside the motor housing 1. A rotor core 5 is provided on the outer side of the middle of the rotating shaft 6. A stator 4 is provided on the outer side of the rotor core 5. The rotating shaft 6 supports the rotor core 5 and the stator 4 and allows them to rotate freely. Bearing chambers are provided in the middle of both the front end cover 2 and the rear end cover 3. Bearings are provided in the bearing chambers. The two sides of the rotating shaft 6 are fixedly connected to the inner rings of the bearings respectively.

[0025] The motor housing 1 includes an outer housing 7 and an inner housing 8. Both the outer housing 7 and the inner housing 8 are in the shape of a cylinder. Both ends of the outer side of the inner housing 8 are raised to form a flange structure. The outer housing 7 is fixedly sleeved on the outer side of the inner housing 8. A first cavity is formed between the outer housing 7 and the inner housing 8. A plurality of annular baffles 9 are arranged between the outer housing 7 and the inner housing 8. The plurality of annular baffles 9 divide the first cavity into a plurality of annular chambers 10. The annular baffles are provided with connecting grooves 11 for connecting adjacent annular chambers 10. An inlet pipe 12 and an outlet pipe 13 are arranged on the outer side of the outer housing 7. The inlet pipe 12 is connected to the annular chamber 10 at the leftmost end of the motor housing 1. The outlet pipe 13 is connected to the annular chamber 10 at the rightmost end of the motor housing 1. When a cooling liquid such as cooling water is injected into the inlet pipe 12, the cooling water will fill the annular chamber 10 at the leftmost end, and then enter the adjacent annular chamber 10 through the connecting groove 11 until all the annular chambers 10 are filled. After the cooling water is filled in all the annular chambers 10, the heat generated by the motor during operation can be absorbed and then discharged from the outlet pipe 13, thus realizing the circulation of the cooling liquid. Compared with the traditional spiral cooling pipe, this solution significantly increases the contact area between the cooling liquid and the motor housing 1, thereby improving the heat dissipation efficiency, helping to reduce the temperature of the motor during operation and prolonging the life of the motor.

[0026] The shape of the connecting groove 11 in this solution can be circular, square or any other shape as long as it can play a connecting role. In this solution, the connecting grooves 11 on the adjacent annular baffles 9 are preferably staggered. The staggered connecting grooves 11 can form a more complex flow path when the cooling liquid flows through the annular chamber 10, increase the contact time between the cooling liquid and the motor housing 1, and avoid the accumulation or shortage of cooling liquid in certain areas, ensuring that the entire motor housing 1 can be evenly cooled to prevent the occurrence of local overheating.

[0027] In this scheme, the cooling liquid can also use other coolants such as cooling oil in addition to cooling water. The use of cooling water in this scheme can be more environmentally friendly and economical, and the cooling water can be recycled, reducing operating costs.

[0028] The portion of the rotating shaft 6 located inside the motor housing 1 is connected to a heat dissipation fan structure, a first air outlet 14 is provided on the front cover 2, and a first air inlet 15 is provided on the rear cover 3. The rotation of the rotating shaft 6 drives the heat dissipation fan structure to rotate. In this embodiment, the heat dissipation fan structure includes fan blades 20. The rotation of the rotating fan blades 20 can drive the flow of surrounding air, thereby increasing the air circulation inside the motor. This flowing air can effectively take away the heat generated inside the motor to achieve a heat dissipation effect. A filter 16 is provided on the first air outlet 14 and the first air inlet 15 to prevent external dust and impurities from entering the motor to affect the heat dissipation effect or damage the motor components.

[0029] The heat dissipation fan structure is provided on the outer side of the rotating shaft 6. The heat dissipation fan structure is the fan blade 20 installed on the rotating shaft 6, which drives the surrounding air flow by rotating. There is a second cavity 17 inside the rotating shaft 6. The axial length of the second cavity 17 is greater than the axial length of the rotor core 5. The two ends of the second cavity 17 are respectively provided with a second air outlet hole 18 and a second air inlet hole 19. By setting the second cavity 17, the second air outlet hole 18 and the second air inlet hole 19, the air flow will pass through the inside of the rotating shaft 6. An air-cooling cycle is also formed inside the rotating shaft 6, forming an additional air-cooling cycle. The combination of this internal air-cooling and external air-cooling achieves a more comprehensive and efficient heat dissipation effect, which helps to further reduce the temperature inside the motor.

[0030] Embodiment 2. The difference between this embodiment and Embodiment 1 is that: there is a second cavity 17 inside the rotating shaft 6. The axial length of the second cavity 17 is greater than the axial length of the rotor core 5. The two ends of the second cavity 17 are respectively provided with a second air outlet hole 18 and a second air inlet hole 19. The heat dissipation fan structure is arranged in the second cavity 17. The heat dissipation fan structure includes a support frame 21. A support seat 22 is installed on the support frame. The support seat 22 is provided with a first spiral blade 23 and a second spiral blade 24. Among them, the support frame 21 is fixed in the second cavity 17 of the rotating shaft 6 to support the support seat 22. The support seat 22 is a cylindrical structure and the axial direction of the support shaft is the same as the axial direction of the rotating shaft 6. When the rotating shaft 6 rotates, it will drive the support seat 22 and the first spiral blade 23 and the second spiral blade 24 thereon to rotate.

[0031] By arranging the heat dissipation fan structure inside the rotating shaft 6, the heat dissipation effect inside the rotating shaft 6 can be increased. Compared with the external fan, the noise and vibration generated by the built-in spiral blade structure during rotation are relatively small. This helps to improve the overall running stability and use comfort of the motor.

[0032] Embodiment 3. The difference between this embodiment and Embodiment 2 is that: the heat dissipation fan structure includes a strip-shaped blade 25. The middle of the blade 25 is twisted into a spiral structure. The second cavity 17 is cylindrical. The width of the blade 25 is the same as the diameter of the second cavity 17 and the edges of the blade 25 are all connected to the side wall of the second cavity 17. The design that the middle of the blade 25 is twisted into a spiral structure enables the blade 25 to generate a more complex and intense air flow when the rotating shaft 6 rotates. This spiral air flow can not only more effectively drive the surrounding air flow, but also enhance the disturbance and mixing of the air during the flow process, thereby improving the heat dissipation efficiency. At the same time, the strip-shaped blade 25 is closely combined with the cylindrical second cavity 17, making the entire heat dissipation fan structure more compact and stable. This structure not only saves space, but also helps to reduce the noise and wear caused by vibration and impact, and improves the overall running reliability and service life of the motor.

[0033] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A motor with a double heat dissipation structure, characterized in that: The motor housing (1) comprises a motor housing (1), a front end cover (2), a rear end cover (3), a stator (4), a rotor core (5) and a rotating shaft (6), wherein the front end cover (2) and the rear end are mounted at the front and rear ends of the motor housing (1), the rotating shaft (6) is rotatably arranged inside the motor housing (1), a rotor core (5) is arranged on the middle outer side of the rotating shaft (6), and a stator (4) is arranged on the outer side of the rotor core (5), the motor housing (1) comprises an outer housing (7) and an inner housing (8), a first cavity is formed between the outer housing (7) and the inner housing (8), a plurality of annular baffles (9) are arranged between the outer housing (7) and the inner housing (8), and the plurality of annular baffles (9) divide the first cavity into a plurality of annular cavities. The annular baffle (9) is provided with a connecting groove (11) for connecting adjacent annular chambers (10); an inlet pipe (12) and an outlet pipe (13) are provided on the outer side of the outer shell (7); the inlet pipe (12) is connected to the annular chamber (10) at the leftmost end of the motor housing (1); the outlet pipe (13) is connected to the annular chamber (10) at the rightmost end of the motor housing (1); a portion of the rotating shaft (6) located on the inner side of the motor housing (1) is connected to a heat dissipation fan structure; a first air outlet hole (14) is provided on the front end cover (2); a first air inlet hole (15) is provided on the rear end cover (3); and a filter screen (16) is provided on both the first air outlet hole (14) and the first air inlet hole (15).

2. The motor with a dual heat dissipation structure according to claim 1, characterized in that: The heat dissipation fan structure is arranged on the outside of the rotating shaft (6), and a second cavity (17) is arranged on the inside of the rotating shaft (6). The axial length of the second cavity (17) is greater than the axial length of the rotor core (5), and a second air outlet (18) and a second air inlet (19) are respectively arranged at two ends of the second cavity (17).

3. The motor with a dual heat dissipation structure according to claim 1, characterized in that: A second cavity (17) is provided inside the rotating shaft (6); the axial length of the second cavity (17) is greater than the axial length of the rotor core (5); a second air outlet (18) and a second air inlet are provided at two ends of the second cavity (17); and the heat dissipation fan structure is provided in the second cavity (17).

4. The motor with a dual heat dissipation structure according to claim 3 is characterized in that: The heat dissipation fan structure comprises a support frame (21), the support frame (21) is connected to the side wall of the second cavity (17), a support seat (22) is mounted on the support frame (21), and a first spiral blade (23) and a second spiral blade (24) are provided on the support seat (22).

5. The motor with a dual heat dissipation structure according to claim 3, characterized in that: The heat dissipation fan structure comprises a long strip blade (25), the middle of the blade (25) is twisted into a spiral structure, the second cavity (17) is cylindrical, the width of the blade (25) is the same as the diameter of the second cavity (17), and the edges of the blade (25) are connected to the side walls of the second cavity (17).

Images