A canned permanent magnet synchronous motor

Abstract

This utility model discloses a sealed permanent magnet synchronous motor, relating to the field of motor technology. A heat-dissipating stator is fixedly mounted on the inner ring of the heat-dissipating housing, and a circulating heat-dissipating pipe is fixedly mounted on the outer ring of the heat-dissipating stator. Stator windings are fixedly mounted on the inner ring of the heat-dissipating stator. A heat-dissipating rotor is located in the inner center of the heat-dissipating stator and is concentrically arranged with it. The front end of the heat-dissipating rotor extends beyond the front end cover. The heat-dissipating rotor is sealed to the front end cover via an oil seal. The front end cover and rear end cover are respectively sealed to the front and rear end faces of the heat-dissipating housing via bolts. A cooling circulation mechanism is fixedly mounted on the top of the heat-dissipating housing via bolts. The cooling circulation mechanism is connected to the circulating heat-dissipating pipe via a pipe. This utility model achieves heat dissipation for both the rotor and stator, making the rotor less prone to demagnetization and less susceptible to high-temperature deformation or winding burnout, thus extending its service life.

Description

Technical Field

[0001] This utility model belongs to the field of electric motor technology, specifically relating to a sealed permanent magnet synchronous motor. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It utilizes a rotating magnetic field generated by a current-carrying coil (stator winding) that acts on the rotor (such as a squirrel-cage closed aluminum frame) to create a magnetoelectric torque. Electric motors are classified into DC motors and AC motors based on the power source they use. Most motors in power systems are AC motors, which can be synchronous or asynchronous (the stator magnetic field speed and rotor rotation speed are not synchronized). An electric motor mainly consists of a stator and a rotor. The direction of the force on a current-carrying conductor in a magnetic field depends on the direction of the current and the direction of the magnetic field lines. The working principle of an electric motor is that the magnetic field exerts a force on the current, causing the motor to rotate.

[0003] Existing permanent magnet synchronous motors have the following problems when operating in a closed environment:

[0004] 1. Traditional air cooling for permanent magnet synchronous motors fails in a closed environment, leading to excessive temperature rise during prolonged operation and causing the stator coils to burn out.

[0005] Second, if the high temperature cannot be discharged in time, the permanent magnet of the rotor is prone to demagnetization at high temperature, and the rotor will also deform.

[0006] Third, a liquid cooling system can be used to dissipate heat from the permanent magnet synchronous motor, but existing liquid cooling systems are quite complex and difficult to maintain later. Utility Model Content

[0007] To address the problems mentioned in the background section, the purpose of this invention is to provide a sealed permanent magnet synchronous motor.

[0008] This utility model discloses a sealed permanent magnet synchronous motor, comprising a base, a heat dissipation shell, a front cover, a rear cover, a heat dissipation rotor, a heat dissipation stator, stator windings, a circulating heat dissipation pipe body, and a cooling circulation mechanism. The heat dissipation shell is welded to the upper surface of the base. A heat dissipation stator is fixedly mounted on the inner ring of the heat dissipation shell. A circulating heat dissipation pipe body is fixedly mounted on the outer ring of the heat dissipation stator. A stator winding is fixedly mounted on the inner ring of the heat dissipation stator. The heat dissipation rotor is located in the inner center of the heat dissipation stator and is concentrically arranged with the heat dissipation stator. Both ends of the heat dissipation rotor are respectively mounted on the front cover and the rear cover via bearings. The front end of the heat dissipation rotor extends beyond the front cover. The heat dissipation rotor is sealed to the front cover via an oil seal. The front cover and the rear cover are respectively sealed to the front and rear ends of the heat dissipation shell via bolts. A cooling circulation mechanism is fixedly mounted on the top of the heat dissipation shell via bolts. The cooling circulation mechanism is connected to the circulating heat dissipation pipe body via pipes.

[0009] As a preferred embodiment, several heat dissipation fins are connected to the outer wall of the heat dissipation shell.

[0010] As a preferred embodiment: the heat-dissipating rotor includes a core body, a magnet body, heat-dissipating rotating plates, a shaft body, and connecting plates; the shaft body is concentrically arranged inside the core body, and several connecting plates are welded to the outer side wall of the shaft body. The other end of the connecting plates is welded to the inner side wall of the core body. Several inclined mounting grooves are evenly opened on the outer side wall of the core body, and magnet bodies are fixedly installed in the mounting grooves. Two heat-dissipating rotating plates are fixedly installed on the two end faces of the core body.

[0011] As a preferred embodiment: a through hole is provided in the middle of the rotating shaft, and heat dissipation holes are provided on both sides of the rotating shaft, with the heat dissipation holes communicating with the through hole.

[0012] As a preferred embodiment: the heat dissipation rotating plate body includes a circular rotating plate and fan blades; several fan blades are uniformly welded on the outer side wall of the circular rotating plate.

[0013] As a preferred embodiment, the outer surface of the heat dissipation stator is uniformly provided with heat dissipation mounting grooves, which are U-shaped.

[0014] As a preferred embodiment: the circulating heat dissipation pipe body includes heat dissipation copper pipes, connectors, and connecting pipes; the ends of several heat dissipation copper pipes are connected together by connectors to form a circulating heat dissipation pipe, and both ends of the circulating heat dissipation pipe are fixedly connected to connecting pipes.

[0015] As a preferred embodiment: the cooling circulation mechanism includes a cooling box, a circulation pump, a heat sink, heat sink fins, and a cooling fan; the heat sink is fixedly installed on the upper surface of the cooling box by bolts and sealing gaskets, several heat sink fins are evenly installed on the bottom of the heat sink, the cooling fan is fixedly installed on the upper surface of the heat sink by bolts, the circulation pump is fixedly installed on the inner bottom of the cooling box, the liquid outlet pipe of the circulation pump is connected to the liquid inlet connection hole opened on the lower side of the cooling box, and the liquid outlet connection hole is opened on the upper side of the cooling box.

[0016] As a preferred embodiment, the heat sink is provided with several long heat dissipation slots 1 that run from front to back and several long heat dissipation slots 2 that run from side to side, and the long heat dissipation slots 1 and 2 are connected.

[0017] As a preferred embodiment, the cooling fan is a turbine fan.

[0018] Compared with existing technologies, the beneficial effects of this utility model are as follows: Through the coordinated operation of the base, heat dissipation shell, front cover, rear cover, heat-dissipating rotor, heat-dissipating stator, stator windings, circulating heat dissipation pipes, and cooling circulation mechanism, heat dissipation of the rotor and stator is achieved. This makes the rotor less prone to demagnetization and less susceptible to high temperatures that could deform or burn out the windings, thus extending its service life. Specific advantages include:

[0019] I. This utility model achieves heat dissipation of the rotor through a heat-dissipating rotor, and at the same time, the hollow shaft facilitates rapid heat dissipation, making the shaft less prone to deformation.

[0020] Second, this utility model achieves stator heat dissipation through a heat dissipation stator, making the stator windings less prone to burnout and extending their service life.

[0021] Third, this utility model achieves coolant circulation through the cooperation of the circulating heat dissipation pipe body and the cooling circulation mechanism, which facilitates heat dissipation inside the heat dissipation shell, enables simultaneous heat dissipation of the stator and rotor, facilitates internal and external heat exchange, improves heat dissipation efficiency, and simplifies maintenance. Attached Figure Description

[0022] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a right view of the heat dissipation shell in this utility model;

[0025] Figure 3 This is a schematic diagram of the heat-dissipating rotor in this utility model;

[0026] Figure 4This is a schematic diagram showing the connection between the rotating core and the rotating shaft in this utility model;

[0027] Figure 5 This is a schematic diagram of the heat dissipation rotating plate in this utility model;

[0028] Figure 6 This is a schematic diagram of the heat dissipation stator in this utility model;

[0029] Figure 7 This is a schematic diagram of the cooling circulation mechanism in this utility model;

[0030] Figure 8 This is a schematic diagram of the heat sink structure in this utility model.

[0031] In the diagram: 1-Base; 2-Heat dissipation shell; 3-Front end cover; 4-Rear end cover; 5-Heat dissipation rotor; 6-Heat dissipation stator; 7-Stator winding; 8-Circulating heat dissipation pipe body; 9-Cooling circulation mechanism;

[0032] 2-1-Heat dissipation fins;

[0033] 3-1-Bearing; 3-2-Oil seal;

[0034] 5-1- Rotating core; 5-2- Magnet body; 5-3- Heat dissipation rotating plate body; 5-4- Rotating shaft body; 5-5- Connecting plate;

[0035] 5-11-Mounting slot;

[0036] 5-31-Circular rotor blade; 5-32-Wind blade;

[0037] 5-41-Through hole; 5-42-Heat dissipation hole;

[0038] 6-1- Heat dissipation mounting slot;

[0039] 8-1-Copper heat dissipation pipe; 8-2-Connector; 8-3-Connecting pipe;

[0040] 9-1-Cooling box; 9-2-Circulation pump; 9-3-Heat sink; 9-4-Heat fins; 9-5-Cooling fan;

[0041] 9-11-Inlet connection hole; 9-12-Outlet connection hole;

[0042] 9-41-Long heat dissipation slot one; 9-42-Long heat dissipation slot two. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. The structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0044] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0045] Specific implementation method one: Combining Figures 1 to 8 The following describes a specific embodiment of the invention. In this embodiment, heat dissipation of the rotor is achieved through a heat-dissipating rotor 5. The specific technical solution includes a base 1, a heat-dissipating outer shell 2, a front end cover 3, a rear end cover 4, a heat-dissipating rotor 5, a heat-dissipating stator 6, and a stator winding 7. The heat-dissipating outer shell 2 is welded to the upper end face of the base 1. The heat-dissipating stator 6 is fixedly installed on the inner ring of the heat-dissipating outer shell 2. The stator winding 7 is fixedly installed on the inner ring of the heat-dissipating stator 6. The heat-dissipating rotor 5 is located in the inner center of the heat-dissipating stator 6 and is concentrically arranged with the heat-dissipating stator 6. The two ends of the heat-dissipating rotor 5 are respectively mounted on the front end cover 3 and the rear end cover 4 via bearings 3-1. The front end of the heat-dissipating rotor 5 extends beyond the exterior of the front end cover 3. The heat-dissipating rotor 5 is sealed to the front end cover 3 via an oil seal 3-2. The front end cover 3 and the rear end cover 4 are respectively sealed to the front and rear end faces of the heat-dissipating outer shell 2 via bolts. In this embodiment, the heat-dissipating outer shell 2 is sealed through the rear end cover 4 and the front end cover 3, while the rotor is cooled by the heat-dissipating rotor 5.

[0046] Combination Figure 1The following describes a specific embodiment. This embodiment achieves heat dissipation of the heat dissipation stator 6 through a circulating heat dissipation pipe body 8 and auxiliary heat dissipation through a cooling circulation mechanism 9. The specific technical solution adopted is as follows: it includes a circulating heat dissipation pipe body 8 and a cooling circulation mechanism 9; the circulating heat dissipation pipe body 8 is fixedly installed on the outer ring of the heat dissipation stator 6, and the cooling circulation mechanism 9 is fixedly installed on the top of the heat dissipation shell 2 by bolts. The cooling circulation mechanism 9 is connected to the circulating heat dissipation pipe body 8 through a pipe, and the circulating heat dissipation pipe body 8 is cooled by the cooling circulation mechanism 9.

[0047] The working principle of this specific embodiment is as follows: In use, it is fixed by the base 1. After fixing, the stator winding 7 is energized to make the heat-dissipating rotor 5 rotate. When the heat-dissipating rotor 5 rotates, it can achieve rapid heat dissipation. The heat-dissipating stator 6 achieves heat dissipation through the circulating heat dissipation pipe 8, which makes the heat-dissipating rotor 5 less prone to demagnetization, and less prone to high temperature and burnout of stator winding 7, thus extending its service life. In use, coolant needs to be added to the cooling circulation mechanism 9. Cooling is achieved by the coolant flowing in the circulating heat dissipation pipe 8, which can improve the cooling effect.

[0048] Specific Implementation Method Two: Combining Figure 2 The following description illustrates this specific embodiment, which is a further limitation of Specific Embodiment 1. This specific embodiment achieves auxiliary heat dissipation through heat dissipation fins 2-1, and specifically adopts the following technical solution: Several heat dissipation fins 2-1 are connected to the outer side wall of the heat dissipation shell 2. The heat dissipation fins 2-1 can achieve auxiliary heat dissipation of the heat dissipation shell 2 and improve the heat dissipation effect.

[0049] Specific implementation method three: Combining Figure 3 , Figure 4 , Figure 5The illustration shows this specific embodiment, which is a further limitation of embodiment one or two. This embodiment uses a heat dissipation rotating plate 5-3 to dissipate heat from the rotating core 5-1, and also employs a hollow rotor body 5-4 for heat dissipation. Specifically, the technical solution is as follows: The heat-dissipating rotor 5 includes a rotating core 5-1, a magnet body 5-2, a heat dissipation rotating plate 5-3, a rotating shaft 5-4, and connecting plates 5-5. The rotating shaft 5-4 is concentrically arranged inside the rotating core 5-1. Several connecting plates 5-5 are welded to the outer wall of the rotating shaft 5-4, connecting the rotating shaft 5-4 and the rotating core 5-1. The gap between them serves as a heat dissipation channel. The other end of the connecting plates 5-5 is welded to the inner wall of the rotating core 5-1. Several inclined... Mounting slot 5-11, in which a magnet 5-2 is fixedly installed. Two heat dissipation rotating plates 5-3 are respectively fixedly installed on the two end faces of the rotating core 5-1. When the rotating core 5-1 rotates, the heat dissipation rotating plates 5-3 can dissipate heat. The rotating shaft 5-4 has a through hole 5-41 in the middle and heat dissipation holes 5-42 on both sides. The heat dissipation holes 5-42 are connected to the through hole 5-41. After the through hole 5-41 and the heat dissipation holes 5-42 are connected, rapid heat dissipation can be achieved. The heat dissipation rotating plate 5-3 includes a circular rotating plate 5-31 and fan blades 5-32. Several fan blades 5-32 are evenly welded on the outer wall of the circular rotating plate 5-31. When the rotating core 5-1 rotates, it drives the circular rotating plate 5-31 to rotate. When rotating, the fan blades 5-32 can achieve rapid heat dissipation and improve heat dissipation efficiency.

[0050] Specific implementation method four: Combination Figure 6 The following is an illustration of this specific embodiment, which is a further limitation of embodiment one, two or three. In this specific embodiment, the circulating heat dissipation pipe body 8 can be installed through the heat dissipation mounting groove 6-1. The specific technical solution adopted is as follows: the heat dissipation stator 6 is uniformly provided with heat dissipation mounting groove 6-1 on its outer surface. The heat dissipation mounting groove 6-1 is U-shaped and can be used to install the circulating heat dissipation pipe body 8, thereby enabling heat dissipation for the heat dissipation stator 6.

[0051] Specific Implementation Method Five: Combining Figure 6The illustration shows this specific embodiment, which is a further limitation of embodiment one, two, three, or four. In this specific embodiment, connector 8-2 is used to connect several heat dissipation copper pipes 8-1 to form a circulation pipe. The specific technical solution is as follows: The circulation heat dissipation pipe body 8 includes heat dissipation copper pipes 8-1, connector 8-2, and connecting pipe 8-3; the ends of several heat dissipation copper pipes 8-1 are connected by connector 8-2 to form a circulation heat dissipation pipe. Connector 8-2 is used to connect several heat dissipation copper pipes 8-1 to form a circulation heat dissipation pipe. Both ends of the circulation heat dissipation pipe are fixedly connected to connecting pipe 8-3. The two connecting pipes 8-3 can realize the connection of the circulation heat dissipation pipe and realize the connection with the cooling circulation mechanism 9.

[0052] Specific Implementation Method Six: Combination Figure 7 , Figure 8 This embodiment illustrates a further limitation of embodiments one, two, three, four, or five. This embodiment uses a circulating pump 9-2 to drive the circulation of coolant to achieve rapid heat dissipation. Specifically, the cooling circulation mechanism 9 includes a cooling box 9-1, a circulating pump 9-2, a heat sink 9-3, heat sink 9-4, and a cooling fan 9-5. The heat sink 9-3 is fixedly mounted on the upper surface of the cooling box 9-1 using bolts and sealing gaskets. The heat sink 9-3 allows for heat exchange with the external environment. Coolant is injected into the cooling box 9-1, and the circulating pump 9-2 circulates the coolant. Several heat sink 9-4 are evenly installed on the bottom of the heat sink 9-3, allowing for heat exchange with the coolant. The cooling fan 9-5 is fixedly mounted on the heat sink 9-1 using bolts. On the upper surface of the heat sink 9-3, the cooling fan 9-5 is a turbine fan, which can assist in the heat dissipation of the heat sink 9-3. A circulation pump 9-2 is fixedly installed at the bottom of the cooling box 9-1. The outlet pipe of the circulation pump 9-2 is connected to the inlet connection hole 9-11 on the lower side of the cooling box 9-1. An outlet connection hole 9-12 is opened on the upper side of the cooling box 9-1. The inlet connection hole 9-11 and the outlet connection hole 9-12 can be connected to two connecting pipes 8-3. Several long heat dissipation slots 9-41 that run from front to back and several long heat dissipation slots 9-42 that run from side to side are opened on the heat sink 9-4. The long heat dissipation slots 9-41 and 9-42 are connected. The long heat dissipation slots 9-41 and 9-42 can make the coolant fully contact the heat sink 9-4, which can improve the efficiency of heat exchange.

[0053] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A canned permanent magnet synchronous motor, characterized by: The system includes a base (1), a heat dissipation shell (2), a front end cover (3), a rear end cover (4), a heat dissipation rotor (5), a heat dissipation stator (6), a stator winding (7), a circulating heat dissipation pipe (8), and a cooling circulation mechanism (9). The heat dissipation shell (2) is welded to the upper end face of the base (1). The heat dissipation stator (6) is fixedly installed on the inner ring of the heat dissipation shell (2). The circulating heat dissipation pipe (8) is fixedly installed on the outer ring of the heat dissipation stator (6). The stator winding (7) is fixedly installed on the inner ring of the heat dissipation stator (6). The heat dissipation rotor (5) is located in the middle of the heat dissipation stator (6). The heat dissipation rotor (5) is set concentrically with the heat dissipation stator (6). The two ends of the heat dissipation rotor (5) are respectively mounted on the front end cover (3) and the rear end cover (4) through bearings (3-1). The front end of the heat dissipation rotor (5) extends out of the front end cover (3). The heat dissipation rotor (5) is sealed to the front end cover (3) through an oil seal (3-2). The front end cover (3) and the rear end cover (4) are respectively sealed to the front and rear end faces of the heat dissipation shell (2) through bolts. The top of the heat dissipation shell (2) is fixedly installed with a cooling circulation mechanism (9) through bolts. The cooling circulation mechanism (9) is connected to the circulating heat dissipation pipe body (8) through a pipe.

2. A canned permanent magnet synchronous motor according to claim 1, characterized in that: Several heat dissipation fins (2-1) are connected to the outer wall of the heat dissipation shell (2).

3. A canned permanent magnet synchronous motor according to claim 1, characterized by: The heat-dissipating rotor (5) includes a core body (5-1), a magnet body (5-2), a heat-dissipating rotating plate body (5-3), a rotating shaft body (5-4), and connecting plates (5-5). The rotating shaft body (5-4) is concentrically arranged inside the core body (5-1). Several connecting plates (5-5) are welded to the outer side wall of the rotating shaft body (5-4). The other end of the connecting plates (5-5) is welded to the inner side wall of the core body (5-1). Several inclined mounting grooves (5-11) are evenly opened on the outer side wall of the core body (5-1). The magnet body (5-2) is fixedly installed in the mounting groove (5-11). Two heat-dissipating rotating plates (5-3) are fixedly installed on the two end faces of the core body (5-1).

4. A sealed permanent magnet synchronous motor according to claim 3, characterized in that: The rotating shaft (5-4) has a through hole (5-41) in the middle and heat dissipation holes (5-42) on both sides. The heat dissipation holes (5-42) are connected to the through hole (5-41).

5. A sealed permanent magnet synchronous motor according to claim 3, characterized in that: The heat dissipation rotating plate body (5-3) includes a circular rotating plate (5-31) and fan blades (5-32); several fan blades (5-32) are uniformly welded on the outer side wall of the circular rotating plate (5-31).

6. A sealed permanent magnet synchronous motor according to claim 1, characterized in that: The heat dissipation stator (6) has uniformly formed heat dissipation mounting grooves (6-1) on its outer surface, and the heat dissipation mounting grooves (6-1) are U-shaped.

7. A sealed permanent magnet synchronous motor according to claim 1, characterized in that: The circulating heat dissipation pipe body (8) includes a heat dissipation copper pipe (8-1), a connector (8-2), and a connecting pipe (8-3); the ends of several heat dissipation copper pipes (8-1) are connected together by the connector (8-2) to form a circulating heat dissipation pipe, and both ends of the circulating heat dissipation pipe are fixedly connected to the connecting pipe (8-3).

8. A sealed permanent magnet synchronous motor according to claim 1, characterized in that: The cooling circulation mechanism (9) includes a cooling box (9-1), a circulation pump (9-2), a heat sink (9-3), heat sinks (9-4), and a cooling fan (9-5). The heat sink (9-3) is fixedly installed on the upper surface of the cooling box (9-1) by bolts and sealing gaskets. Several heat sinks (9-4) are evenly installed on the bottom of the heat sink (9-3). The cooling fan (9-5) is fixedly installed on the upper surface of the heat sink (9-3) by bolts. The circulation pump (9-2) is fixedly installed on the inner bottom of the cooling box (9-1). The liquid outlet pipe of the circulation pump (9-2) is connected to the liquid inlet connection hole (9-11) opened on the lower side of the cooling box (9-1). The liquid outlet connection hole (9-12) is opened on the upper side of the cooling box (9-1).

9. A sealed permanent magnet synchronous motor according to claim 8, characterized in that: The heat sink (9-4) has several long heat dissipation slots (9-41) that run from front to back and several long heat dissipation slots (9-42) that run from side to side, and the long heat dissipation slots (9-41) and the long heat dissipation slots (9-42) are connected.

10. A sealed permanent magnet synchronous motor according to claim 8, characterized in that: The cooling fan (9-5) is a turbine fan.

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