An energy-saving circulating water cooling structure for permanent magnet motor

Abstract

The present invention discloses an energy-saving circulating water cooling structure for a permanent magnet motor, belonging to the technical field of motors, comprising: a casing, a front end cover for sealing being fixedly mounted on the front end of the casing, a rear end cover for sealing being fixedly mounted on the rear end of the casing, a rotating shaft for rotation being rotatably mounted through the casing, the front end cover and the rear end cover, and a rotor core being fixedly mounted on the rotating shaft near the interior of the casing; the energy-saving circulating water cooling structure for the permanent magnet motor is provided with a turbine which can transport coolant to the interiors of a first spiral cooling groove and a second spiral cooling groove respectively when the turbine rotates; after the coolant enters the interior of the first spiral cooling groove, it can flow from the front end of the casing to the rear end of the casing in a spiral shape for cooling; after the coolant enters the interior of the second spiral cooling groove, it can flow from the rear end of the casing to the front end of the casing in a spiral shape for cooling; the facilitating the opposite flow of coolant can make the heat dissipation of the permanent magnet motor more uniform, thereby improving the heat dissipation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an energy-saving circulating water cooling structure for a permanent magnet motor. Background Art

[0002] Permanent magnet motors (PMMs) use permanent magnets to generate magnetic fields. They offer advantages such as high efficiency, high power density, and low maintenance costs. They are widely used in electric vehicles, wind power generation, industrial drives, and household appliances. Water cooling is a common cooling method for PMMs, primarily used to address the heat generated by high-load operation. During motor operation, current flowing through the windings and core generates heat. If this heat cannot be dissipated promptly, the motor temperature will rise, affecting its performance and lifespan, and may even cause failure. A water cooling system uses circulating coolant to absorb and remove heat from the motor.

[0003] Patent No. CN111561453B discloses a permanent magnet direct-drive slurry pump with a water-cooled circulation structure. The pump comprises a pump body, a permanent magnet synchronous motor, and a cooling water tank. The pump body is directly mounted and connected to the permanent magnet synchronous motor, sharing a common shaft. The permanent magnet synchronous motor also includes a built-in coolant drive device installed in the motor housing of the permanent magnet synchronous motor. The cooling water tank, the built-in coolant drive device, and the coolant channel provided in the motor housing form a cooling circulation channel. This invention addresses the shortcomings of existing slurry pumps, such as complex structure, low transmission efficiency, and high energy consumption, while achieving the purpose of water-cooling the drive motor. The structure also assists in offsetting axial forces. The invention dissipates heat through a spiral water channel spirally wrapped around the interior of the motor housing. Coolant can flow spirally from one end of the spiral water channel to the other end. During the spiral flow, the coolant absorbs heat, resulting in increasing coolant temperature during the spiral flow. This results in lower heat absorption efficiency when the coolant reaches the other end of the spiral water channel. Furthermore, the coolant needs to flow in the coolant tank to dissipate heat, resulting in lower heat dissipation efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide an energy-saving circulating water cooling structure for a permanent magnet motor, in which the coolant flows in spirals in opposite directions through a first spiral cooling groove and a second spiral cooling groove. When the coolant flows in spirals in opposite directions, the heat of the casing can be dissipated from front to back and from back to front, so that the heat dissipation of the casing can be more uniform.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an energy-saving circulating water-cooling structure for a permanent magnet motor, comprising: a casing, a front end cover for sealing being fixedly mounted on the front end of the casing, a rear end cover for sealing being fixedly mounted on the rear end of the casing, a rotating shaft for rotation being rotatably mounted between the casing, the front end cover and the rear end cover, a rotor core being fixedly mounted on the rotating shaft near the interior of the casing, a stator core being fixedly mounted on the inner wall of the casing near the rotor core, the casing including a heat dissipation component for cooling internal equipment, a heat dissipation component being mounted inside the casing, the rear end cover including a cooling component for cooling a coolant, and a cooling component being fixedly mounted on the rear end cover;

[0006] The heat dissipation component includes a first spiral cooling groove and a second spiral cooling groove for the flow of coolant, a collecting hole for the coolant to gather, and a turbine for the coolant to be transported;

[0007] The interior of the housing is provided with a first spiral cooling groove and a second spiral cooling groove, and the first spiral cooling groove and the second spiral cooling groove are staggered in a spiral shape inside the housing;

[0008] The inner sides of the first spiral cooling groove and the second spiral cooling groove are provided with collecting holes at equal distances, and a turbine is fixedly installed on the side of the rotating shaft;

[0009] The cooling assembly includes a first cooling pipe for cooling the coolant inside the first spiral cooling tank, and a second cooling pipe for cooling the coolant inside the second spiral cooling tank;

[0010] A second cooling pipe is provided on the back of the rear end cover, and a first cooling pipe is provided on the back of the second cooling pipe. Both the second cooling pipe and the first cooling pipe are spiral-shaped.

[0011] Preferably, the first spiral cooling groove includes a first avoidance groove for crossing the second spiral cooling groove, and a first connecting pipe for transporting the coolant to the interior of the first spiral cooling groove;

[0012] The first avoidance groove is opened inside the casing at the intersection of the first spiral cooling groove and the second spiral cooling groove, and the casing between the first avoidance groove and the second spiral cooling groove is installed with an insulation layer, and one end of the first connecting pipe is connected to the water inlet of the first spiral cooling groove.

[0013] Preferably, the first spiral cooling tank further comprises a second connecting pipe for conveying the coolant to the first cooling pipe;

[0014] The water outlet of the first spiral cooling trough is connected to one end of a second connecting pipe, and the other end of the second connecting pipe is connected to the water inlet of the first cooling pipe.

[0015] Preferably, the second spiral cooling groove includes a second avoidance groove for crossing the first spiral cooling groove, and a third connecting pipe for transporting the coolant to the interior of the second cooling pipe;

[0016] The second avoidance groove is provided inside the housing at the intersection of the first spiral cooling groove and the second spiral cooling groove;

[0017] One end of the third connecting pipe is connected to the water outlet of the second spiral cooling trough, and the other end of the third connecting pipe is connected to the water inlet of the second cooling pipe.

[0018] Preferably, the turbine comprises a water outlet cavity for mounting the turbine, and a first water outlet hole and a second water outlet hole for discharging water from the water outlet cavity;

[0019] The housing is provided with a water outlet cavity at the rear end near the turbine, and the inner wall of the water outlet cavity is axially symmetrically provided with a first water outlet hole and a second water outlet hole;

[0020] The other end of the first water outlet is connected to the water inlet of the first connecting pipe, and the other end of the second water outlet is connected to the water inlet of the second spiral cooling trough.

[0021] Preferably, the turbine further comprises a first abutment for delivering the coolant of the first cooling pipe to the interior of the water outlet cavity, and a second abutment for delivering the coolant of the second cooling pipe to the interior of the water outlet cavity;

[0022] The surface of the rear end cover is axially symmetrically provided with a first pairing interface and a second pairing interface;

[0023] One end of the first port is connected to the water outlet cavity, and the other end is connected to the first cooling pipe;

[0024] One end of the second port is connected to the water outlet cavity, and the other end is connected to the second cooling pipe.

[0025] Preferably, the cooling assembly further includes heat dissipation fins and an impeller for dissipating heat from the first cooling tube and the second cooling tube, and a fixing plate for mounting the heat dissipation fins and the impeller;

[0026] A plurality of heat dissipation fins are fixedly mounted in a circular array at the axial center of the rear end cover, and a first cooling pipe and a second cooling pipe are fixedly mounted between the surfaces of the plurality of heat dissipation fins through assembly holes;

[0027] An impeller is installed at the end of the rotating shaft close to the heat dissipation fins, and a fixing plate is fixedly installed on the side of the heat dissipation fins away from the rear end cover.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the permanent magnet motor has an energy-saving circulating water cooling structure.

[0029] 1. When the turbine rotates, the coolant can be transported to the inside of the first spiral cooling groove and the second spiral cooling groove respectively. After the coolant enters the first spiral cooling groove, it can flow from the front end of the casing to the rear end of the casing in a spiral shape to cool down. After the coolant enters the second spiral cooling groove, it can flow from the rear end of the casing to the front end of the casing in a spiral shape to cool down. The opposite flow of coolant can make the heat dissipation of the permanent magnet motor more uniform and improve the heat dissipation efficiency.

[0030] 2. The coolant flowing inside the first spiral cooling groove and the second spiral cooling groove will pass through the collecting hole. Since the collecting hole is cylindrical, the coolant inside the first spiral cooling groove and the second spiral cooling groove will be in a reduced pressure state when entering the collecting hole, and then the coolant will generate eddy currents inside the collecting hole. The eddy currents generated by the coolant will mix the coolant close to the inside of the casing and the coolant far away from the inside of the casing, so that the coolant can more fully dissipate heat for the permanent magnet motor;

[0031] 3. The coolant inside the first spiral cooling groove and the second spiral cooling groove is transported to the inside of the first cooling pipe and the second cooling pipe through the water outlet after the heat dissipation of the permanent magnet motor is completed. The first cooling pipe and the second cooling pipe can increase the flow path of the coolant through their own spiral shape to improve the cooling time. During the flow of the coolant, the heat absorption of the metal copper material of the first cooling pipe and the second cooling pipe can improve the heat dissipation effect, which is convenient;

[0032] 4. The coolant entering the first cooling tube and the second cooling tube will pass through annular heat dissipation fins when flowing. The heat dissipation fins can absorb and dissipate the heat on the surface of the first cooling tube and the second cooling tube through their own metal copper material. The space between adjacent heat dissipation fins can form an outward heat dissipation channel, so that when the rotating shaft rotates, the impeller at the end can be driven to rotate. The airflow generated when the impeller rotates can be discharged outward through the heat dissipation channel of the heat dissipation fins. The airflow caused by the rotation of the impeller will take away the heat on the surface of the heat dissipation fins while being discharged outward, thereby greatly improving the cooling efficiency of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0035] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0036] Figure 4It is a schematic diagram of a partial three-dimensional enlarged structure of the present invention;

[0037] Figure 5 It is a schematic diagram of a partial two-dimensional enlarged structure of the present invention;

[0038] Figure 6 It is a schematic diagram of a three-dimensional enlarged structure of the heat dissipation fin of the present invention.

[0039] In the figure: 100, housing;

[0040] 110. First spiral cooling trough; 111. First avoidance trough; 112. First connecting pipe; 113. Second connecting pipe;

[0041] 120, second spiral cooling trough; 121, second avoidance trough; 122, third connecting pipe;

[0042] 130, collection hole;

[0043] 140, turbine; 141, water outlet chamber; 142, first water outlet; 143, second water outlet; 144, first docking port; 145, second docking port;

[0044] 200, front end cover;

[0045] 300, rear end cover;

[0046] 310, heat dissipation fin; 320, impeller; 330, fixing plate; 340, first cooling pipe; 350, second cooling pipe;

[0047] 400, shaft;

[0048] 500, stator core;

[0049] 600. Rotor core. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate for the embodiments of the present application described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or vehicle that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or vehicles.

[0052] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "liquid level," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0053] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to express a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0054] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0055] See also Figure 1-Figure 3The present invention provides an embodiment: an energy-saving circulating water cooling structure for a permanent magnet motor, comprising: a casing 100, a front end cover 200 for sealing fixedly mounted on the front end of the casing 100, a rear end cover 300 for sealing fixedly mounted on the rear end of the casing 100, a rotating shaft 400 rotatably mounted through the casing 100, the front end cover 200 and the rear end cover 300, a rotor core 600 fixedly mounted on the rotating shaft 400 near the interior of the casing 100, a stator core 500 fixedly mounted on the inner wall of the casing 100 near the rotor core 600, the casing 100 including a heat dissipation component for cooling internal equipment, a heat dissipation component mounted inside the casing 100, the rear end cover 300 including a cooling component for cooling a coolant, and a cooling component fixedly mounted on the rear end cover 300;

[0056] It should be understood that after the junction box on the casing 100 is energized, a three-phase symmetrical current enters the winding of the stator core 500. After the winding of the stator core 500 is energized, a rotating magnetic field will be generated in space. The permanent magnets on the rotor core 600 begin to rotate under the electromagnetic force of the rotating magnetic field. When the rotor core 600 rotates, it can drive the rotating shaft 400 to rotate. When the rotating shaft 400 rotates, it can rotate on the casing 100, the front cover 200 and the rear cover 300 through bearings. The stator core 500 and the rotor core 600 will generate a lot of heat when working. The heat dissipation component can dissipate heat and cool the stator core 500 and the rotor core 600 through coolant. After the coolant of the heat dissipation component absorbs heat, it can be cooled through the cooling component, so that the coolant can be recycled.

[0057] like Figures 1-4 As shown, the heat dissipation assembly includes a first spiral cooling groove 110 and a second spiral cooling groove 120 for coolant flow, a collection hole 130 for coolant collection, and a turbine 140 for coolant delivery. The first spiral cooling groove 110 and the second spiral cooling groove 120 are respectively opened inside the housing 100. The first spiral cooling groove 110 and the second spiral cooling groove 120 are staggered in a spiral shape inside the housing 100. The collection holes 130 are evenly spaced on the inner sides of the first spiral cooling groove 110 and the second spiral cooling groove 120. The turbine 140 is fixedly mounted on the side of the rotating shaft 400.

[0058] It can be imagined that when the shaft 400 rotates, it can drive the turbine 140 to rotate. When the turbine 140 rotates, it can transport the coolant to the inside of the first spiral cooling groove 110 and the second spiral cooling groove 120 respectively. After the coolant enters the inside of the first spiral cooling groove 110, it can flow from the front end of the casing 100 to the rear end of the casing 100 in a spiral shape. The coolant can be cooled during the spiral flow. After the coolant enters the inside of the second spiral cooling groove 120, it can flow from the rear end of the casing 100 to the front end of the casing 100 in a spiral shape. The coolant can be cooled during the spiral flow. The counter-flow of the coolant can make the heat dissipation of the permanent magnet motor more uniform.

[0059] When the coolant flows inside the first spiral cooling groove 110 and the second spiral cooling groove 120, it will pass through the collecting hole 130. Since the collecting hole 130 is cylindrical, when the coolant inside the first spiral cooling groove 110 and the second spiral cooling groove 120 enters the collecting hole 130, it will be in a reduced pressure state, and then the coolant will generate eddy currents inside the collecting hole 130. The eddy currents generated by the coolant will mix the coolant close to the inside of the casing 100 and the coolant far away from the inside of the casing 100, so that the coolant can more fully dissipate heat for the permanent magnet motor.

[0060] like Figure 2-Figure 6 As shown, the cooling assembly includes a first cooling pipe 340 for cooling the coolant inside the first spiral cooling groove 110, and a second cooling pipe 350 for cooling the coolant inside the second spiral cooling groove 120. The second cooling pipe 350 is provided on the back of the rear end cover 300, and the first cooling pipe 340 is provided on the back of the second cooling pipe 350. Both the second cooling pipe 350 and the first cooling pipe 340 are spiral-shaped.

[0061] It is worth noting that the coolant inside the first spiral cooling trough 110 will be transported to the inside of the first cooling pipe 340 through the water outlet after the heat dissipation of the permanent magnet motor is completed. The first cooling pipe 340 can increase the flow path of the coolant through its own spiral shape to improve the cooling time. The coolant inside the second spiral cooling trough 120 will be transported to the inside of the second cooling pipe 350 through the water outlet after the heat dissipation of the permanent magnet motor is completed. The second cooling pipe 350 can increase the flow path of the coolant through its own spiral shape to improve the cooling time. During the flow process, the coolant can improve the heat dissipation effect through the heat absorption of the metal copper material of the first cooling pipe 340 and the second cooling pipe 350.

[0062] like Figure 1-Figure 5As shown, the first spiral cooling trough 110 includes a first avoidance groove 111 for crossing the second spiral cooling trough 120, and a first connecting pipe 112 for transporting coolant to the interior of the first spiral cooling trough 110. The first avoidance groove 111 is opened inside the casing 100 at the intersection of the first spiral cooling trough 110 and the second spiral cooling trough 120, and the casing 100 between the first avoidance groove 111 and the second spiral cooling trough 120 is installed with a heat insulation layer. One end of the first connecting pipe 112 is connected to the water inlet of the first spiral cooling trough 110;

[0063] It can be imagined that the first connecting pipe 112 can transport the coolant delivered by the turbine 140 to the interior of the first spiral cooling groove 110. After the coolant enters the interior of the first spiral cooling groove 110, it will flow in a spiral. When the coolant flows to the upper part of the first spiral cooling groove 110, it can pass through the arc shape of the first avoidance groove 111 and continue to flow over the second spiral cooling groove 120. The heat insulation layer can also be used to prevent the coolants of the first spiral cooling groove 110 and the second spiral cooling groove 120 from interfering with each other when they intersect.

[0064] like Figure 2-Figure 6 As shown, the first spiral cooling tank 110 further includes a second connecting pipe 113 for conveying coolant to the first cooling pipe 340. The water outlet of the first spiral cooling tank 110 is connected to one end of the second connecting pipe 113, and the other end of the second connecting pipe 113 is connected to the water inlet of the first cooling pipe 340.

[0065] It should be understood that after the coolant inside the first spiral cooling trough 110 cools the permanent magnet motor, it can enter the interior of the second connecting pipe 113 through the water outlet, and the second connecting pipe 113 can transport the coolant to the interior of the first cooling pipe 340 through the water outlet end of the first cooling pipe 340 for cooling.

[0066] like Figure 2-Figure 6 As shown, the second spiral cooling trough 120 includes a second avoidance groove 121 for crossing the first spiral cooling trough 110, and a third connecting pipe 122 for transporting coolant to the interior of the second cooling pipe 350. The second avoidance groove 121 is opened inside the housing 100 at the intersection of the first spiral cooling trough 110 and the second spiral cooling trough 120, and the housing 100 between the second avoidance groove 121 and the first spiral cooling trough 110 is installed with a heat insulation layer. One end of the third connecting pipe 122 is connected to the water outlet end of the second spiral cooling trough 120, and the other end of the third connecting pipe 122 is connected to the water inlet of the second cooling pipe 350.

[0067] It can be imagined that when the turbine 140 is working, the coolant can be transported to the interior of the second spiral cooling groove 120. After the coolant enters the interior of the second spiral cooling groove 120, it will flow in a spiral. When the coolant flows to the lower part of the second spiral cooling groove 120, it can pass through the arc shape of the second avoidance groove 121 to continue to flow over the first spiral cooling groove 110. The heat insulation layer can also be used to prevent the coolants in the first spiral cooling groove 110 and the second spiral cooling groove 120 from interfering with each other when they meet. When the coolant is transported to the end of the second spiral cooling groove 120, it can be transported to the interior of the third connecting pipe 122 through the water outlet. After the coolant enters the interior of the third connecting pipe 122, it can be transported to the interior of the second cooling pipe 350 through the water inlet of the second cooling pipe 350 for cooling.

[0068] like Figure 1-Figure 5 As shown, the turbine 140 includes a water outlet cavity 141 for mounting the turbine 140, and a first water outlet hole 142 and a second water outlet hole 143 for discharging water from the water outlet cavity 141. The housing 100 is provided with the water outlet cavity 141 at the rear end near the turbine 140. The inner wall of the water outlet cavity 141 is axially symmetrically provided with the first water outlet hole 142 and the second water outlet hole 143. The other end of the first water outlet hole 142 is connected to the water inlet of the first connecting pipe 112, and the other end of the second water outlet hole 143 is connected to the water inlet of the second spiral cooling trough 120.

[0069] It is worth noting that when the turbine 140 rotates, the coolant inside the water outlet chamber 141 can be pumped, and the coolant can be squeezed toward the side of the turbine 140 when being pumped. When the coolant is squeezed, it can be discharged through the first water outlet hole 142 and the second water outlet hole 143. After the coolant enters the first water outlet hole 142, it can be transported to the interior of the first connecting pipe 112 through the water inlet of the first connecting pipe 112. After the coolant enters the second water outlet hole 143, it can be transported to the interior of the second spiral cooling trough 120 through the water inlet of the second spiral cooling trough 120.

[0070] like Figure 2 、 Figure 3 、 Figure 5-Figure 6 As shown, the turbine 140 further includes a first docking port 144 for conveying coolant from the first cooling pipe 340 to the interior of the water outlet chamber 141, and a second docking port 145 for conveying coolant from the second cooling pipe 350 to the interior of the water outlet chamber 141. The surface of the rear end cover 300 is axially symmetrically provided with the first docking port 144 and the second docking port 145. One end of the first docking port 144 is connected to the water outlet chamber 141, and the other end is connected to the first cooling pipe 340. One end of the second docking port 145 is connected to the water outlet chamber 141, and the other end is connected to the second cooling pipe 350.

[0071] It can be imagined that the rotation of the turbine 140 can generate negative pressure inside the water outlet chamber 141. The negative pressure of the water outlet chamber 141 can pump the coolant inside the first cooling pipe 340 and the second cooling pipe 350 through the first docking port 144 and the second docking port 145. When the coolant inside the first cooling pipe 340 and the second cooling pipe 350 is pumped, it can be transported to the inside of the first docking port 144 and the second docking port 145 through the water outlet, and then the first docking port 144 and the second docking port 145 transport the coolant to the inside of the water outlet chamber 141 for transportation.

[0072] like Figure 1-Figure 3 、 Figure 5 and Figure 6 As shown, the cooling assembly further includes heat dissipation fins 310 and an impeller 320 for dissipating heat from the first cooling tube 340 and the second cooling tube 350, and a fixing plate 330 for mounting the heat dissipation fins 310 and the impeller 320. A plurality of heat dissipation fins 310 are fixedly mounted in a circular array at the axial center of the rear end cover 300. The first cooling tube 340 and the second cooling tube 350 are fixedly mounted between the surfaces of the plurality of heat dissipation fins 310 through assembly holes. The impeller 320 is mounted on the end of the rotating shaft 400 near the heat dissipation fins 310, and the fixing plate 330 is fixedly mounted on the side of the heat dissipation fins 310 away from the rear end cover 300.

[0073] It should be understood that when the coolant enters the first cooling tube 340 and the second cooling tube 350, it will pass through the annular heat dissipation fins 310. The heat dissipation fins 310 can absorb and dissipate the heat on the surface of the first cooling tube 340 and the second cooling tube 350 through its own metal copper material. The space between adjacent heat dissipation fins 310 can form an outward heat dissipation channel, so that when the rotating shaft 400 rotates, it can drive the impeller 320 at the end to rotate. The airflow generated by the rotation of the impeller 320 can be discharged outward through the heat dissipation channel of the heat dissipation fins 310. The airflow generated by the rotation of the impeller 320 will take away the heat on the surface of the heat dissipation fins 310 while being discharged outward, thereby greatly improving the cooling efficiency of the coolant.

[0074] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An energy-saving circulating water cooling structure for a permanent magnet motor, comprising: A casing (100), wherein a front end cover (200) for sealing is fixedly installed at the front end of the casing (100), and a rear end cover (300) for sealing is fixedly installed at the rear end of the casing (100); a rotating shaft (400) for rotation is rotatably installed between the casing (100), the front end cover (200) and the rear end cover (300); a rotor core (600) is fixedly installed on the rotating shaft (400) near the inside of the casing (100); a stator core (500) is fixedly installed on the inner wall of the casing (100) near the rotor core (600); the casing (100) includes a heat dissipation component for cooling internal equipment; a heat dissipation component is installed inside the casing (100); the rear end cover (300) includes a cooling component for cooling a coolant; and a cooling component is fixedly installed on the rear end cover (300), characterized in that; The heat dissipation component comprises a first spiral cooling groove (110) and a second spiral cooling groove (120) for the flow of cooling liquid, a collecting hole (130) for collecting the cooling liquid, and a turbine (140) for transporting the cooling liquid; A first spiral cooling groove (110) and a second spiral cooling groove (120) are respectively provided inside the housing (100), and the first spiral cooling groove (110) and the second spiral cooling groove (120) are staggeredly distributed in a spiral shape inside the housing (100); The inner sides of the first spiral cooling groove (110) and the second spiral cooling groove (120) are provided with collecting holes (130) at equal distances, and a turbine (140) is fixedly mounted on the side of the rotating shaft (400); The cooling assembly comprises a first cooling pipe (340) for cooling the cooling liquid inside the first spiral cooling groove (110), and a second cooling pipe (350) for cooling the cooling liquid inside the second spiral cooling groove (120); A second cooling pipe (350) is provided on the back of the rear end cover (300), a first cooling pipe (340) is provided on the back of the second cooling pipe (350), and both the second cooling pipe (350) and the first cooling pipe (340) are spiral-shaped.

2. The energy-saving circulating water cooling structure of a permanent magnet motor according to claim 1, characterized in that: The first spiral cooling trough (110) comprises a first avoidance trough (111) for crossing the second spiral cooling trough (120), and a first connecting pipe (112) for conveying cooling liquid into the interior of the first spiral cooling trough (110); The first avoidance groove (111) is opened inside the casing (100) at the intersection of the first spiral cooling groove (110) and the second spiral cooling groove (120), and the casing (100) between the first avoidance groove (111) and the second spiral cooling groove (120) is installed with a heat insulation layer, and one end of the first connecting pipe (112) is connected to the water inlet of the first spiral cooling groove (110).

3. The energy-saving circulating water cooling structure of a permanent magnet motor according to claim 1, characterized in that: The first spiral cooling trough (110) further includes a second connecting pipe (113) for conveying cooling liquid to the first cooling pipe (340); The water outlet of the first spiral cooling trough (110) is connected to one end of a second connecting pipe (113), and the other end of the second connecting pipe (113) is connected to the water inlet of the first cooling pipe (340).

4. The energy-saving circulating water cooling structure for a permanent magnet motor according to claim 1, characterized in that: The second spiral cooling groove (120) includes a second avoidance groove (121) for crossing the first spiral cooling groove (110), and a third connecting pipe (122) for conveying the coolant to the inside of the second cooling pipe (350); The second avoidance groove (121) is opened inside the housing (100) at the intersection of the first spiral cooling groove (110) and the second spiral cooling groove (120); One end of the third connecting pipe (122) is connected to the water outlet of the second spiral cooling trough (120), and the other end of the third connecting pipe (122) is connected to the water inlet of the second cooling pipe (350).

5. The energy-saving circulating water cooling structure of a permanent magnet motor according to claim 2, characterized in that: The turbine (140) comprises a water outlet cavity (141) for installing the turbine (140), and a first water outlet hole (142) and a second water outlet hole (143) for discharging water from the water outlet cavity (141); The housing (100) is provided with a water outlet cavity (141) at the rear end thereof close to the turbine (140), and the inner wall of the water outlet cavity (141) is provided with a first water outlet hole (142) and a second water outlet hole (143) symmetrically in the axial direction. The other end of the first water outlet hole (142) is connected to the water inlet of the first connecting pipe (112), and the other end of the second water outlet hole (143) is connected to the water inlet of the second spiral cooling trough (120).

6. The energy-saving circulating water cooling structure for a permanent magnet motor according to claim 5, characterized in that: The turbine (140) further includes a first docking port (144) for transporting the cooling liquid of the first cooling pipe (340) to the interior of the water outlet cavity (141), and a second docking port (145) for transporting the cooling liquid of the second cooling pipe (350) to the interior of the water outlet cavity (141); The surface of the rear end cover (300) is axially symmetrically provided with a first docking port (144) and a second docking port (145); One end of the first port (144) is connected to the water outlet cavity (141), and the other end is connected to the first cooling pipe (340); One end of the second docking port (145) is connected to the water outlet cavity (141), and the other end is connected to the second cooling pipe (350).

7. The energy-saving circulating water cooling structure for a permanent magnet motor according to claim 1, characterized in that: The cooling assembly further includes a heat dissipation fin (310) and an impeller (320) for dissipating heat from the first cooling tube (340) and the second cooling tube (350), and a fixing plate (330) for mounting the heat dissipation fin (310) and the impeller (320); A plurality of heat dissipation fins (310) are fixedly mounted in a circular array at the axial center of the rear end cover (300), and a first cooling pipe (340) and a second cooling pipe (350) are fixedly mounted between the surfaces of the plurality of heat dissipation fins (310) via assembly holes; An impeller (320) is installed at the end of the rotating shaft (400) close to the heat dissipation fin (310), and a fixing plate (330) is fixedly installed on the side of the heat dissipation fin (310) away from the rear end cover (300).

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