Self-cooling motor

Abstract

The invention discloses a self-cooling motor. The self-cooling motor comprises a motor main body, a fan, a pump body and a radiator, wherein the motor main body is provided with a rotating shaft; the fan is coaxially connected with the rotating shaft; the pump body comprises an impeller which is coaxially connected with the rotating shaft; the radiator is positioned on one side of the motor main body; a circulating communicating pipeline is formed between the radiator and the motor body, the pump body is located on the circulating communicating pipeline, the rotating shaft rotates to drive the fan and the impeller to rotate together, and cooling liquid can flow in the circulating communicating pipeline under the rotating action of the impeller. According to the technical scheme provided by the invention, the reliability of the whole motor system is greatly enhanced, self-circulation cooling is realized through an air cooling and liquid cooling mode, an extra expensive water cooling unit is not needed for cooling, and the matching cost of the whole motor is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a self-cooling motor. Background Art

[0002] Motors are ubiquitous in our daily lives. Motors are the heart of industrial equipment and the power source of the equipment. Axial permanent magnet synchronous motors have been widely used. However, for medium and high-power axial permanent magnet synchronous motors, due to their small volume and high power density, it is difficult for the motors to dissipate heat. Compared with traditional motors, axial permanent magnet synchronous motors generally use liquid cooling to dissipate heat. In this way, a water cooling unit is required to dissipate heat from the motor. Since the cost of the water cooling unit is relatively expensive, the motor is packaged and sold with the water cooling unit, and the cost of the entire system is high and the reliability is poor. Summary of the Invention

[0003] In order to solve the above technical problems, the main object of the present invention is to provide a self-cooling motor, aiming to solve the problems of high heat dissipation cost and poor reliability of traditional axial permanent magnet synchronous motors.

[0004] To achieve the above object, a self-cooling motor proposed by the present invention includes:

[0005] A motor body having a rotating shaft;

[0006] A fan coaxially connected to the rotating shaft;

[0007] A pump body including an impeller coaxially connected to the rotating shaft;

[0008] A radiator located on one side of the motor body;

[0009] Wherein, a circulation communication pipeline is formed between the radiator and the motor body, the pump body is located on the circulation communication pipeline, the rotation of the rotating shaft drives the fan and the impeller to rotate together, and under the action of the rotation of the impeller, the coolant can flow in the circulation communication pipeline.

[0010] Optionally, the motor body includes a housing, the rotating shaft has a first end and a second end extending out of the housing, the first end is adapted to connect to a device to be driven, and the fan, the pump body and the radiator are all located at the second end of the rotating shaft.

[0011] Optionally, the radiator is located at the air inlet end of the fan, and the pump body is located on the air flow path between the radiator and the fan.

[0012] Optionally, the motor body further includes a flow guide member, which is connected to the housing and located between the housing and the fan, and is used to guide the airflow formed by the fan towards the inside of the housing.

[0013] Optionally, the flow guide member is arranged in a cylindrical shape with both ends open, and has a reduced diameter end and a flared end that are oppositely arranged along the axial direction of the rotation shaft. The reduced diameter end faces the fan, and the flared end is connected to the housing; and / or,

[0014] The motor body further includes an air accumulation ring, which covers the outer peripheral side of the fan, and the air accumulation ring is integrally arranged with the flow guide member.

[0015] Optionally, the pump body further includes a mounting plate and a pump housing arranged on the mounting plate. The mounting plate connects the radiator and the motor body and enables the radiator to communicate with the fan. The impeller is rotatably arranged in the pump housing and fixedly sleeved on the rotation shaft.

[0016] Optionally, the mounting plate includes a mounting bottom plate and a mounting side plate protruding from the side of the mounting bottom plate facing away from the fan along the axial direction of the rotation shaft. The mounting side plate is arranged in a ring shape to cover the outer peripheral side of the pump housing. The radiator is arranged at the other end of the mounting side plate, and the heat dissipation area of the radiator covers the inside of the mounting side plate. The mounting bottom plate is connected to the motor body.

[0017] Optionally, at least part of the mounting bottom plate is provided with a hollow; and / or,

[0018] A second step portion is formed at the connection between the mounting bottom plate and the mounting side plate, and the second step portion abuts against the motor body; and / or,

[0019] A socket hole is formed in the middle of the mounting bottom plate. At least part of the side of the pump housing facing the fan abuts against the end of the socket hole. The impeller includes a hub and blades. The hub is screwed onto the rotation shaft, and the blades are located in the pump housing.

[0020] Optionally, a liquid inlet and a liquid outlet are formed on the pump housing. The liquid outlet communicates with the radiator, and the liquid inlet communicates with the motor body.

[0021] Optionally, a first step portion is provided on the rotation shaft. The self-cooling motor further includes a first locking member. The first step portion and the first locking member respectively abut against both sides of the fan along its axial direction; and / or,

[0022] The self-cooling motor further includes an expansion tank, which is detachably arranged on the top of the radiator, and the expansion tank is communicated with a circulating pipeline located in the radiator.

[0023] The technical solution provided by the present invention has the following beneficial effects:

[0024] The self-cooling motor provided by the present invention includes a motor main body, a fan, a pump body and a radiator. Among them, the impellers of the fan and the pump body are coaxially connected to the rotating shaft of the motor main body. When the rotating shaft rotates, the fan and the impeller can be driven to rotate together. The airflow formed by the fan can enter the motor main body to dissipate heat from the motor main body; moreover, a circulating pipeline is arranged between the radiator and the motor main body, and a cooling liquid can be introduced into the circulating pipeline; and the rotation of the rotating shaft drives the impeller to rotate together. Since the impeller is arranged on the circulating pipeline, therefore, under the rotation of the impeller, the coolant can be driven to flow in the circulating pipeline to flow back and forth between the radiator and the motor main body, taking away the heat in the motor main body and better dissipating heat from the motor main body; and when the coolant flows through the motor main body, the temperature of the coolant will rise after absorbing the heat in the motor main body. When it flows through the radiator again, the heat of the coolant can be quickly dissipated through the radiator, so that the coolant remains in a low temperature state, and still can better take away the heat in the motor main body when the coolant flows through the motor main body again, improving the heat dissipation effect on the motor main body. The self-cooling motor provided by the present invention highly integrates the motor main body, the fan, the pump body and the radiator, greatly enhancing the reliability of the entire motor system, and realizing self-circulating cooling through the combination of air cooling and liquid cooling, no longer requiring an additional expensive water-cooling unit for cooling, and greatly reducing the overall motor supporting cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0026] Figure 1 It is a schematic structural diagram of an embodiment of a self-cooling motor provided by the present invention;

[0027] Figure 2 For Figure 1 a schematic structural diagram of another perspective of the self-cooling motor described above;

[0028] Figure 3 For Figure 2 a schematic cross-sectional structure diagram taken along the A-A direction in the above;

[0029] Figure 4 For Figure 1 a schematic exploded view of the self-cooling motor described in

[0030] Explanation of the reference numerals in the drawings:

[0031] 100 - self-cooling motor; 1 - motor main body; 11 - rotating shaft; 12 - housing; 13 - flow guide member; 14 - air accumulation ring; 2 - fan; 3 - pump body; 31 - impeller; 32 - pump housing; 321 - front housing; 3211 - liquid inlet; 3212 - liquid outlet; 322 - rear housing; 33 - mounting plate; 331 - mounting side plate; 332 - mounting bottom plate; 4 - radiator; 5 - expansion tank; 6 - circulating communication pipeline; 61 - first pipe fitting; 62 - second pipe fitting; 63 - third pipe fitting.

[0032] For the realization of the object of the present invention, its functional characteristics and excellent effects, the following will be further described in conjunction with specific embodiments and the drawings. Specific embodiments

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0034] It should be noted that if there are directional indications involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0036] The present invention provides a self-cooling motor 100. Specifically, please refer toFigures 1 to 3 In this embodiment, the self-cooling motor 100 includes a motor main body 1, a fan 2, a pump body 3 and a radiator 4. The motor main body 1 has a rotating shaft 11; the fan 2 is coaxially connected to the rotating shaft 11; the pump body 3 includes an impeller 31, and the impeller 31 is coaxially connected to the rotating shaft 11; the radiator 4 is located on one side of the motor main body 1; wherein, a circulating communication pipeline 6 is formed between the radiator 4 and the motor main body 1, the pump body 3 is located on the circulating communication pipeline 6, and the rotation of the rotating shaft 11 drives the fan 2 and the impeller 31 to rotate together. Under the rotation of the impeller 31, the coolant can flow in the circulating communication pipeline 6.

[0037] In this embodiment, both the fan 2 and the impeller 31 of the pump body 3 are coaxially connected to the rotating shaft 11 of the motor main body 1. When the rotating shaft 11 rotates, it can drive the fan 2 and the impeller 31 to rotate together. The air flow formed by the fan 2 can enter the motor main body 1 to dissipate heat from the motor main body 1; moreover, a circulating communication pipeline 6 is provided between the radiator 4 and the motor main body 1, and a cooling liquid (such as water, oil, etc.) can be introduced into the circulating communication pipeline 6; and the rotation of the rotating shaft 11 drives the impeller 31 to rotate together. Since the impeller 31 is arranged on the circulating communication pipeline 6, therefore, under the rotation of the impeller 31, the coolant can be driven to flow in the circulating communication pipeline 6 to flow reciprocally between the radiator 4 and the motor main body 1, taking away the heat in the motor main body 1 and better dissipating heat from the motor main body 1; moreover, when the coolant becomes hot when flowing through the motor main body 1, the temperature of the coolant will rise after absorbing the heat in the motor main body 1. When flowing through the radiator 4 again, the radiator 4 can quickly dissipate the heat of the coolant, so that the coolant can maintain a low temperature state, further improving the heat dissipation effect on the motor main body 1. The self-cooling motor 100 provided by the present invention highly integrates the motor main body 1, the fan 2, the pump body 3 and the radiator 4, greatly enhancing the reliability of the entire motor system. Moreover, through the air-cooling plus liquid-cooling method, self-circulating cooling is realized, and no additional expensive water-cooling unit is required for cooling, greatly reducing the overall motor supporting cost.

[0038] It should be noted that, when the self-cooling motor 100 is set in normal use, the rotating shaft 11 of the motor body 1 is arranged in the horizontal direction. Among them, the motor body 1 includes a housing 12, and a stator assembly and a rotating assembly arranged in the housing 12. The rotating shaft 11 has a first end and a second end that are arranged to pass through the housing 12. The first end of the rotating shaft 11 is suitable for connecting the device to be driven. The fan 2, the pump body 3 and the radiator 4 are all located at the second end of the rotating shaft 11, so that there will be no interference from any parts on the driving side of the rotating shaft, and the layout of the fan 2, the pump body 3 and the radiator 4 is more compact and occupies less space. The description of the orientation in the present invention can be referred to as above unless otherwise specified. And for the convenience of explanation, the following description is mainly based on the coolant being water.

[0039] Specifically, combined Figure 1 and Figure 3 As shown in , the radiator 4 is located at the outermost side of the self-cooling motor 100, so as to be located at the air inlet end of the fan 2. The fan 2 is arranged close to the motor body 1, and the pump body 3 is located on the air flow path between the radiator 4 and the fan 2. Preferably, when the radiator 4 and the fan 2 are both arranged coaxially with the rotating shaft 11, the pump body 3 is also arranged coaxially with the rotating shaft 11, and the pump body 3 is located between the radiator 4 and the fan 2, so that the airflow can take away part of the heat on the pump body 3 when entering the fan 2, so as to play the role of cooling the pump body 3.

[0040] In one embodiment, the motor body 1 also includes a guide member 13, which is connected to the shell 12 and is located between the shell 12 and the fan 2. The guide member 13 is used to guide the airflow formed by the fan 2 toward the motor body 1, so that the cold air flow can be better blown into the interior of the motor body 1, thereby better taking away the heat in the motor body 1 and effectively dissipating the heat.

[0041] Furthermore, if Figure 3 As shown in , the guide member 13 is provided in a cylindrical shape with both ends open, and the guide member 13 has a constricted end and a flared end which are arranged opposite to each other along the axial direction of the rotating shaft 11, the constricted end is arranged toward the fan 2, and the flared end is connected to the housing 12. Preferably, the fan 2 is provided as an axial flow fan, and when the fan 2 rotates, the formed airflow flows from the constricted end of the guide member 13 toward the flared end, and under the guidance of the arc-shaped side wall forming the flared end, the airflow is arranged at various places of the motor body 1, and the airflow is arranged more widely and evenly, which can achieve a heat dissipation effect at various places in the motor body 1.

[0042] Moreover, combined with Figure 1 and Figure 3As shown, the motor body 1 further includes an air accumulation ring 14. The air accumulation ring 14 is generally arranged in a circular ring shape and covers the outer peripheral side of the fan 2, so that the air flow around the fan 2 can be better accumulated, thereby increasing the air volume, enhancing the air flow entering the motor body 1, and further improving the heat dissipation efficiency. And further preferably, the air accumulation ring 14 and the flow guiding member 13 are integrally arranged. The flow guiding member 13 is fixedly connected to the housing 12 of the motor body 1. A plurality of guiding columns are arranged between the air accumulation ring 14 and the flow guiding member 13 for screws or bolts to pass through for connection with the housing 12. And at least part of each guiding column is connected to the outer ring surface of the air accumulation ring 14, so that when the screws or bolts are connected, it is ensured that both the flow guiding member 13 and the air accumulation ring 14 are better connected and fixed to the housing 12, and thus the fixation is more stable and reliable. Moreover, at least part of the connection part between the flow guiding member 13 and the air accumulation ring 14 is provided with a hollow or air passing holes, so that the external air flow can better enter the fan 2 to ensure sufficient air flow.

[0043] It can be understood that the fan 2 can be directly or indirectly connected and fixed to the rotating shaft 11. For example, the central hole of the fan 2 can be directly sleeved on the outside of the rotating shaft 11. Or, the fan 2 is fixed to a connecting shaft, and the connecting shaft is then connected and fixed to the rotating shaft 11.

[0044] Preferably, the fan 2 is directly fixedly sleeved on the outside of the rotating shaft 11, and a stop fit can be formed between the fan 2 and the rotating shaft 11 along the axial direction of the rotating shaft 11 through the rotating shaft 11. Specifically, a first stepped portion is provided on the rotating shaft 11. The self-cooling motor 100 further includes a first locking member. The first stepped portion and the first locking member respectively abut against both sides of the fan 2 along its axial direction, thereby clamping and fixing the fan 2 on the rotating shaft 11 to limit the axial relative position between the fan 2 and the rotating shaft 11.

[0045] Further preferably, an external thread is provided on the rotating shaft 11 near the first stepped portion. The first locking member is set as a locking nut. By screwing the locking nut with the external thread on the rotating shaft 11, and one axial end of the locking nut abuts against one side of the fan 2 and the other side of the fan 2 abuts against the first stepped portion, the position of the fan 2 on the rotating shaft 11 is completely limited, ensuring the stability of the fan 2, and the disassembly and assembly of the fan 2 are more convenient.

[0046] For the pump body 3, the pump body 3 is set as a mechanical water pump. Specifically, as Figure 3As shown in the figure, the pump body 3 further includes a mounting plate 33 connected to the motor main body 1 and a pump housing 32 provided on the mounting plate 33. The mounting plate 33 connects the radiator 4 and the motor main body 1 and enables the radiator 4 to communicate with the fan 2. The impeller 31 is rotatably arranged in the pump housing 32 and fixedly sleeved on the rotating shaft 11. Among them, the pump housing 32 is connected to the side of the air accumulation ring 14 opposite to the deflector 13, and a plurality of mounting holes corresponding to the above-mentioned plurality of connecting posts are provided on the mounting plate 33. The above-mentioned screws or studs can pass through the corresponding connecting posts and mounting holes to connect and fix the mounting plate 33, the air accumulation ring 14, the deflector 13 and the motor main body 1. There is no need to connect and assemble multiple parts separately, with fewer assembly steps, simpler operation, fewer connecting parts and lower cost.

[0047] Further, as Figure 3 shown in the figure, the mounting plate 33 includes a mounting bottom plate 332 and a mounting side plate 331 protruding axially along the rotating shaft 11 on the side of the mounting bottom plate opposite to the fan. The mounting side plate 331 is arranged in a ring shape to cover the outer peripheral side of the pump housing 32, and the radiator 4 is arranged at the other end of the axial direction of the mounting side plate 331, and the heat dissipation area of the radiator 4 is located within the covering area of the mounting side plate 331, so that the air flow can flow better from the radiator 4 towards the fan 2. The mounting bottom plate 332 is connected to the motor main body 1. Specifically, the above-mentioned plurality of mounting holes are provided on the mounting bottom plate 332. Since the side of the mounting side plate 331 facing the radiator 4 is open, during assembly, screws or bolts can be inserted into the mounting side plate 331 from the open side of the mounting side plate 331 to pass through the corresponding mounting holes and connecting posts, so that the mounting plate 33, the air accumulation ring 14, the deflector 13 and the housing 12 are all relatively connected and fixed.

[0048] Among them, the mounting side plate 331 is generally arranged in a circular ring shape and is adapted to the shape of the air accumulation ring 14. The mounting bottom plate 332 is generally in a disc shape, and at least part of the mounting bottom plate 332 is provided with a hollow, so that the air flow passing through the radiator 4 can pass through the mounting bottom plate 332 and then enter the fan 2, with a larger air flow rate. Moreover, a second step portion is formed at the connection between the mounting bottom plate 332 and the mounting side plate 331, and the second step portion abuts against the motor main body 1. Specifically, the second step portion abuts against the end of the air accumulation ring 14 opposite to the deflector 13. Since the air accumulation ring 14 and the deflector 13 are integrally arranged, the side of the deflector 13 opposite to the air accumulation ring 14 abuts against the housing 12 of the motor main body 1, and at the same time, the side of the air accumulation ring 14 opposite to the deflector 13 is also abutted through the mounting plate 33, so that the relative positions of the deflector 13 and the air accumulation ring 14 are fixed.

[0049] Further, for the fixation of the pump housing 32, the pump housing 32 is fixedly connected to the mounting plate 33. Specifically, as Figure 3As shown in the figure, the pump housing 32 includes a connected front housing 321 and a rear housing 322. A first assembly hole is provided on the rear housing 322, and a second assembly hole opposite to the first assembly hole is provided on the mounting bottom plate 332 of the mounting plate 33. The pump housing 32 and the mounting plate 33 are connected and fixed by screws or bolts passing through the first assembly hole and the second assembly hole. Before screwing the pump housing 32 and the mounting plate 33, the pump housing 32 can be preliminarily positioned. Specifically, a socket hole is formed in the middle of the mounting bottom plate 332. The socket hole is arranged around the outer peripheral side of the rotating shaft 11 and is spaced from the rotating shaft 11. At least part of the side of the pump housing 32 facing the fan 2 abuts against the end of the socket hole. Specifically, a ring-shaped protrusion protrudes from the middle of the rear housing 322. At least part of the ring-shaped protrusion can extend into the socket hole and at least part of it abuts against the hole end face of the socket hole to limit the relative axial position between the pump housing 32 and the rotating shaft 11. Moreover, a plurality of reinforcing ribs are provided on the periphery of the ring-shaped protrusion. The plurality of reinforcing ribs are arranged radially from the ring-shaped protrusion to ensure the abutting strength between the pump housing 32 and the mounting bottom plate 332. The impeller 31 includes a hub and blades. The hub is screwed onto the rotating shaft 11. The blades are located inside the pump housing 32. By screwing the hub onto the rotating shaft 11 and abutting against the third step portion on the rotating shaft 11 when the screwing is in place, on the one hand, the relative position between the impeller 31 and the rotating shaft 11 is limited, and on the other hand, the position of the pump housing 32 can be defined, and the disassembly and assembly are more convenient.

[0050] Among them, a pump chamber is formed between the front housing 321 and the rear housing 322. A flow passage is formed in the pump chamber. Under the rotation of the impeller 31, the liquid in the pump chamber can enter the pump chamber in one direction and flow out of the pump chamber in another direction. Specifically, in combination with Figure 1 and Figure 4As shown in the figure, a liquid inlet 3211 and a liquid outlet 3212 are formed on the pump housing 32. Preferably, both the liquid inlet 3211 and the liquid outlet 3212 are provided on the rear housing 322. The liquid outlet 3212 is connected to the radiator 4 through a circulation connecting pipeline 6, and the liquid inlet 3211 is connected to the motor main body 1 through the circulation connecting pipeline 6. Preferably, a first inlet and a first outlet are formed on the radiator 4, a second inlet and a second outlet are provided on the motor main body 1, and the circulation connecting pipeline 6 includes a first pipe fitting 61 connecting the liquid outlet 3212 and the first inlet of the radiator 4, a second pipe fitting 62 connecting the first outlet of the radiator 4 and the second inlet of the motor main body 1, a third pipe fitting 63 connecting the second outlet of the motor main body 1 and the liquid inlet 3211, a first flow channel provided in the radiator 4, and a second flow channel provided in the motor main body 1. Under the rotation of the impeller 31, water can enter the radiator 4 along the first pipe fitting 61. After being cooled by the radiator 4 when flowing through the first flow channel, it enters the motor main body 1 from the second pipe fitting 62. After flowing through the heating components in the motor main body 1, it then flows to the pump body 3 through the third pipe fitting 63, and so on in a cycle. When the rotating shaft 11 rotates continuously, the impeller 31 can also rotate continuously. Therefore, cooling water is continuously provided to the motor main body 1, enabling the motor main body 1 to be effectively cooled during operation. Moreover, no additional cooling power is required, the structure is simpler, the cost is lower, and the stability is better.

[0051] Wherein, a first connecting nozzle is provided at the liquid outlet 3212. The first connecting nozzle extends from the middle of the front housing and is bent toward one side of the mounting side plate 331. One end of the first pipe fitting 61 extends into the mounting side plate 331 to be connected to the first connecting nozzle, and the other end of the first pipe fitting 61 extends out of the mounting side plate 331 and is bent and extended toward the radiator 4. The first pipe fitting 61 may include one or more pipe segments for easy connection. A second connecting nozzle is provided at the liquid inlet 3211. The second connecting nozzle extends from the periphery of the pump housing and extends toward the other side of the mounting side plate 331. One end of the third pipe fitting 63 extends into the mounting side plate 331 to be connected to the second connecting nozzle, and the other end of the third pipe fitting 63 extends out of the mounting side plate 331 and is bent and extended toward the housing 12. The third pipe fitting 63 may include one or more pipe segments. The second pipe fitting 62 is connected between the housing 12 and the radiator 4. Similarly, the second pipe fitting 62 may also include one or more pipe segments. According to the specific dimensions and installation methods of the self-cooling motor 100, the installation lengths of the respective pipe fittings can be reasonably adjusted, and the applicability is better.

[0052] In addition, in combination with Figure 1 and Figure 3As shown, the self-cooling motor 100 further includes an expansion tank 5. The expansion tank 5 is detachably arranged on the top of the radiator 4, and the expansion tank 5 is connected to a circulating pipeline 6 located inside the radiator 4. During the operation of the self-cooling motor 100, the temperature of the coolant will change. According to the principle of thermal expansion and contraction, when the temperature of the coolant rises, its volume will expand. The expansion tank 5 can provide a space for the expanded coolant, avoiding damage to the cooling system caused by the volume expansion of the coolant, such as pipe rupture, seal damage, etc. Moreover, the expansion tank 5 can adjust the installation position of the expansion tank 5 according to the working posture of the self-cooling motor 100. When the self-cooling motor 100 works vertically, that is, when the rotating shaft 11 is placed vertically, the expansion tank 5 can be installed on the side of the radiator 4. At this time, only the positions of the first inlet and the first outlet of the radiator 4 need to be adjusted so that the radiator 4 can be better connected to the pump body 3 and the motor main body 1, and the setting method is more flexible and variable.

[0053] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structures made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A self-cooling motor, characterized in that: include: A motor body having a rotating shaft; A fan is coaxially connected to the rotating shaft; A pump body, comprising an impeller coaxially connected to the rotating shaft; A radiator, located on one side of the motor body; A circulating connecting pipeline is formed between the radiator and the motor body, the pump body is located on the circulating connecting pipeline, and the rotation of the rotating shaft drives the fan and the impeller to rotate together, so that the coolant can flow in the circulating connecting pipeline under the rotation of the impeller.

2. The self-cooling motor according to claim 1, characterized in that: The motor body includes a shell, the rotating shaft has a first end and a second end that pass through the shell, the first end is suitable for connecting to a device to be driven, and the fan, the pump body and the radiator are all located at the second end of the rotating shaft.

3. The self-cooling motor according to claim 2, characterized in that: The radiator is located at the air inlet end of the fan, and the pump body is located on the air flow path between the radiator and the fan.

4. The self-cooling motor according to claim 2, characterized in that: The motor body further comprises a flow guide, which is connected to the housing and is located between the housing and the fan. The flow guide is used to guide the airflow formed by the fan toward the inside of the housing.

5. The self-cooling motor according to claim 4, characterized in that: The guide member is in the shape of a cylinder with two ends open, and has a contracted end and a flared end oppositely arranged along the axial direction of the rotating shaft, the contracted end is arranged toward the fan, and the flared end is connected to the housing; and / or, The motor body further comprises a wind accumulation ring, which is arranged on the outer peripheral side of the fan, and the wind accumulation ring is integrally arranged with the flow guide member.

6. The self-cooling motor according to claim 1, characterized in that: The pump body also includes a mounting plate and a pump housing arranged on the mounting plate. The mounting plate connects the radiator and the motor body and enables the radiator to communicate with the fan. The impeller is rotatably arranged in the pump housing and fixedly sleeved on the rotating shaft.

7. The self-cooling motor according to claim 6, characterized in that: The mounting plate includes a mounting base plate and a mounting side plate protruding along the axial direction of the rotating shaft and arranged on the side of the mounting base plate facing away from the fan. The mounting side plate is arranged in a ring shape to cover the outer peripheral side of the pump housing. The radiator is arranged at the other end of the mounting side plate, and the heat dissipation area of ​​the radiator is covered on the inner side of the mounting side plate. The mounting base plate is connected to the motor body.

8. The self-cooling motor according to claim 7, characterized in that: At least part of the installation base plate is hollowed out; and / or, A second step portion is formed at a connection between the mounting bottom plate and the mounting side plate, and the second step portion abuts against the motor body; and / or, A socket hole is formed in the middle of the mounting base plate, and the side of the pump housing facing the fan at least partially abuts against the end of the socket hole. The impeller includes a hub and blades. The hub is screwed to the rotating shaft, and the blades are located in the pump housing.

9. The self-cooling motor according to claim 6, characterized in that: The pump housing is provided with a liquid inlet and a liquid outlet, the liquid outlet is communicated with the radiator, and the liquid inlet is communicated with the motor body.

10. The self-cooling motor according to claim 1, characterized in that: The rotating shaft is provided with a first step portion, the self-cooling motor further comprises a first locking member, the first step portion and the first locking member are respectively abutted against two sides of the fan along the axial direction thereof; and / or, The self-cooling motor further comprises an expansion water tank, which is detachably arranged on the top of the radiator and is communicated with a circulation communication pipeline in the radiator.

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