Direct-driven energy-saving motor

Abstract

The invention discloses a direct-drive type energy-saving motor, which relates to the technical field of motors, and comprises a shell, a shaft rotatably connected to the center of the shell, a stator core rotatably connected to the outer wall of the shaft, and a cooling assembly comprising a cooling ring fixedly connected to the inner wall of the shell, a plurality of cooling grooves distributed in the circumferential direction are formed in the cooling ring, and heat conduction plates are fixed in the cooling grooves and used for guiding heat transfer. The adjusting assembly comprises a plurality of adjusting rods connected with the cooling tank in a sliding mode, two adjusting plates are hinged to the adjusting rods, the adjusting plates are connected with the side wall of the cooling tank in a sliding mode, and when the temperature in the shell rises, the adjusting rods drive the two adjusting plates to swing; the cooling liquid in the cooling tank generates turbulent flow and secondary flow, so that the heat exchange efficiency is improved; according to the invention, the heat exchange efficiency of the cooling liquid can be dynamically adjusted, and the interior of the motor is fully cooled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a direct-drive energy-saving electric machine. BACKGROUND

[0002] The torque of a permanent magnet electric machine is composed of a permanent magnet torque and a reluctance torque, the permanent magnet torque is provided by a permanent magnet, and the reluctance torque is provided by a reluctance structure, thereby realizing the adjustment and control of the main magnetic field of the electric machine, and improving the speed regulation, driving performance or voltage regulation characteristics of the electric machine. Direct drive of the electric drum means that the drum is directly driven by the electric machine without the need for transmission media such as a belt, thereby improving efficiency and reducing noise and vibration.

[0003] In the prior art, the working principle of a conventional rare earth permanent magnet electric machine is the same as that of an electrically excited synchronous electric machine, but the difference is that the rare earth permanent magnet electric machine uses a permanent magnet to replace the excitation winding for excitation. When the three-phase stator winding of the rare earth permanent magnet electric machine is connected to three-phase alternating current with a frequency of f, a rotating magnetic field with a synchronous speed will be generated, thereby driving the electric machine to operate. However, rare earth permanent magnet materials such as neodymium iron boron are expensive, and their production process involves the extraction and processing of rare earth elements, which not only leads to an increase in material costs, but also ultimately affects the overall price of the electric machine due to the limited nature of rare earth resources and market fluctuations.

[0004] A hybrid excitation electric drum direct-drive electric machine is disclosed in Chinese Patent No. 202510310660.8, which includes a housing, a shaft rotatably connected at the center of the housing, and a stator core rotatably connected to the outer wall of the shaft. It also includes a material-saving excitation mechanism for mixing and reasonably arranging the rare earth permanent magnets to reduce the amount of rare earth permanent magnets; and a combined heat removal mechanism for combining different heat removal methods in different environments.

[0005] The material-saving excitation mechanism comprises an outer rotor core abutting against the inner wall of the shell, a plurality of pairs of first hole grooves are equidistantly formed on the inner wall of the outer rotor core around the circumference, a plurality of threaded holes are formed near the shell in each pair of first hole grooves, a fixing bolt is threadedly connected at the position of the first hole groove and the threaded hole of the shell, a plurality of pairs of second hole grooves are equidistantly formed on the inner wall of the outer rotor core around the circumference, the second hole grooves are distributed on the outer rotor core at intervals from the first hole grooves, the combined heat-removing mechanism comprises a threaded ring fixedly connected to the outer wall of the shell, a fan is threadedly connected to the outer wall of the threaded ring, a plurality of fins are equidistantly fixedly connected to the outer wall of the shell, a cooling pipe is fixedly connected to the outer wall of the shell, a water inlet is fixedly and communicatively connected to one end of the cooling pipe, and a water outlet is fixedly and communicatively connected to the other end of the cooling pipe, the combined heat-removing mechanism further comprises a second leaf gate fixedly connected to the edge of the inner wall of the shell, a slide column is fixedly connected to the side of the second leaf gate away from the shaft, the slide column abuts against the fan, a plurality of grooves are formed at the center of the second leaf gate, a first leaf gate is movably sleeved on the outer wall of the slide column, a plurality of protrusions are fixedly connected to the side of the first leaf gate close to the second leaf gate, and the outer wall of the protrusion is clamped in the groove.

[0006] Therefore, the direct-drive energy-saving motor is invented to solve the above problems. SUMMARY

[0007] The main purpose of the present application is to provide a direct-drive energy-saving motor, which can effectively solve the technical problems in the background art.

[0008] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a direct-drive energy-saving motor, comprising a shell, a shaft rotatably connected at the center of the shell, and a stator core rotatably connected to the outer wall of the shaft, further comprising: a cooling assembly comprising a cooling ring fixedly connected to the inner wall of the shell, a plurality of circumferentially distributed cooling grooves formed in the cooling ring, and a heat-conducting plate fixedly arranged in the cooling groove for guiding heat transfer.

[0009] The adjusting assembly comprises a plurality of adjusting rods in sliding connection with the cooling tank, two adjusting plates are hinged on the adjusting rods, the adjusting plates are in sliding connection with the side walls of the cooling tank, when the temperature in the shell increases, the adjusting rods drive the two adjusting plates to swing, so that the cooling liquid in the cooling tank generates turbulent flow and secondary flow, thereby improving the heat exchange efficiency.

[0010] Preferably, the cooling assembly comprises two flow guide cavities opened in the cooling ring, the cooling tank is located between the two flow guide cavities, both ends of the cooling tank are in communication with the flow guide cavities through through holes, and the two flow guide cavities are in communication through a guide pipe.

[0011] Preferably, the adjusting assembly comprises a plurality of top rods in sliding connection with the heat conduction plates, one end of the top rod is fixedly connected with the corresponding adjusting rod, a push rod is in sliding connection in the heat conduction plate, a plurality of guide grooves are formed in the push rod, and the other end of the top rod is in sliding connection with the corresponding guide groove through a sliding rod.

[0012] Preferably, one end of the push rod is fixedly connected with a push plate, a plurality of accommodating cavities corresponding to the push plate are formed in one end of the cooling ring close to the push plate, and the push plate is in sliding connection with the corresponding accommodating cavity.

[0013] Preferably, a heat expansion gas is filled between the other end of the push plate away from the push rod and the accommodating cavity, and one end of the push plate close to the push rod is connected with the accommodating cavity through an elastic member.

[0014] Preferably, heat conduction fins are fixedly connected to the inner walls of the two sides of the cooling ring, for transmitting heat to the accommodating cavities.

[0015] Preferably, an insulating layer and a waterproof layer are fixed to the inner wall of the cooling ring.

[0016] Preferably, a material-saving excitation assembly is arranged between the cooling assembly and the stator core, for mixing magnetic fields and reasonably arranging to reduce the use amount of rare earth permanent magnets.

[0017] Preferably, mounting covers are fixed to the two ends of the shell, and the two ends of the shaft are in rotary connection with the mounting covers through bearings.

[0018] Preferably, a heat dissipation cover is fixed to one end of the shell, one end of the shaft extends into the heat dissipation cover and is provided with a fan, and a plurality of circumferentially distributed heat dissipation fins are fixed to the outer side of the shell.

[0019] Technical effects and advantages of the present application:

[0020] The present invention provides an adjusting rod, a push rod, an adjusting plate, a push rod, a guide groove, a sliding rod and a linkage structure of thermal expansion gas, which can not only enable the adjusting rod to drive the adjusting plate to increase the distance between the adjusting plate and the heat conducting plate when the heat dissipation efficiency inside the motor is insufficient, and reduce the angle between the two adjusting plates. Under the coordinated action of multiple groups of adjusting plates, the coolant flowing through the adjusting plates will have turbulence and secondary flow. At this time, not only the contact area between the coolant and the heat conducting plate is increased to fully exchange heat, but the laminar bottom layer of the coolant is also destroyed by the turbulence generated by the coolant, and the thickness of the coolant hot edge layer is reduced, thereby further improving the efficiency of the coolant in cooling and dissipating heat inside the casing, avoiding the problem of failure of the magnet in a high temperature environment, and ensuring that the motor can operate normally. In addition, the two adjusting plates can dynamically adjust the heat exchange efficiency of the coolant under changes in the internal temperature of the motor, and can also dynamically adjust the energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the cooling assembly in the present invention;

[0024] Figure 4 A cross-sectional view of the structure of the cooling assembly in the present invention;

[0025] Figure 5 For the present invention Figure 4 A partial enlarged view of point A in the middle;

[0026] Figure 6 For the present invention Figure 5 A partial enlarged view of point B in the middle;

[0027] Figure 7 Schematic diagram of the structure of the guide plate and the adjustment assembly in the present invention;

[0028] Figure 8 It is a structural schematic diagram of the adjustment component in the present invention.

[0029] In the figure: 1. Housing; 2. Shaft; 3. Stator core;

[0030] 4. Cooling assembly; 401. Cooling ring; 402. Cooling groove; 403. Heat conducting plate; 404. Diversion cavity; 405. Through hole; 406. Conduit; 407. Heat conducting sheet; 408. Insulation layer; 409. Waterproof layer;

[0031] 5. Adjustment assembly; 501. Adjustment rod; 502. Adjustment plate; 503. Ejector rod; 504. Push rod; 505. Guide groove; 506. Sliding rod; 507. Push plate; 508. Accommodation chamber; 509. Thermal expansion gas; 510. Elastic member;

[0032] 6. Material-saving excitation assembly; 7. Mounting cover; 8. Bearing; 9. Heat dissipation cover; 10. Fan; 11. Heat dissipation fins. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figures 1 to 3 As shown, this embodiment provides a direct-drive energy-saving motor, including a shell 1, a shaft 2 is rotatably connected to the center of the shell 1, and the outer wall of the shaft 2 is rotatably connected to the stator core 3, and also includes: a cooling assembly 4, which includes a cooling ring 401 fixedly connected to the inner wall of the shell 1, and a plurality of circumferentially distributed cooling grooves 402 are opened in the cooling ring 401, and a heat conducting plate 403 is fixed in the cooling groove 402 to guide the transfer of heat; a material-saving excitation assembly 6 is provided between the cooling assembly 4 and the stator core 3, which is used for mixing magnetism and reasonably arranging to reduce the amount of rare earth permanent magnets, and mounting covers 7 are fixed at both ends of the shell 1, and both ends of the shaft 2 are rotatably connected to the mounting cover 7 through bearings 8, a heat dissipation cover 9 is fixed at one end of the shell 1, and one end of the shaft 2 extends into the heat dissipation cover 9 and is provided with a fan 10, and a plurality of circumferentially distributed heat dissipation fins 11 are fixed on the outside of the shell 1.

[0036] In actual use, since the material-saving excitation component 6 is composed of an outer rotor core and multiple ferrites and neodymium iron borons, the arrangement and quantity of ferrites and neodymium iron borons are all existing technologies, and the specific arrangement will not be repeated. This arrangement can reduce the utilization of rare earth resources and reduce the cost of motor production. Under the action of the magnetic field, the shaft 2 is driven to rotate, and the shaft 2 drives the fan 10 to rotate for heat dissipation. At the same time, the cooling tank 402 circulates coolant to exchange heat with the inside of the shell 1, thereby improving the heat dissipation efficiency. At the same time, the heat is fully dissipated through air cooling and liquid cooling during high-speed operation of the motor, which can not only ensure that the magnet can be in a normal temperature environment to avoid magnetic failure, but also ensure that the motor can operate stably and normally.

[0037] Example 2

[0038] In use, it is found that during high-speed operation of the motor, the air cooling heat dissipation mode cannot achieve good heat dissipation effect on the inside of the motor, and the cooling liquid flows in the pipeline for heat exchange for heat dissipation and cooling, and the heat dissipation contact area is small, which leads to poor heat dissipation effect, and the cooling liquid only flows quickly in the pipeline, and the heat exchange efficiency is not high, and the temperature inside the motor cannot be reduced in time, and the motor cannot be dynamically cooled according to the change of the temperature inside the motor, which leads to the problem of magnetic failure of the magnet inside the motor, and the working of the motor is easily affected, and therefore the motor is further improved based on the above embodiment.

[0039] As shown in Figures 3 to 8 The adjusting assembly 5 includes a plurality of adjusting rods 501 in sliding connection with the cooling groove 402, and two adjusting plates 502 are hinged on the adjusting rods 501, and the adjusting plates 502 are in sliding connection with the side wall of the cooling groove 402. When the temperature in the shell 1 rises, the adjusting rods 501 drive the two adjusting plates 502 to swing, so that the cooling liquid in the cooling groove 402 generates turbulent flow and secondary flow, thereby improving the heat exchange efficiency.

[0040] The cooling assembly 4 includes two flow guide cavities 404 opened in the cooling ring 401, and the cooling groove 402 is located between the two flow guide cavities 404, and the two ends of the cooling groove 402 are in communication with the flow guide cavities 404 through the through holes 405, and the two flow guide cavities 404 are in communication through the conduit 406.

[0041] The adjusting assembly 5 includes a plurality of top rods 503 in sliding connection with the heat conduction plate 403, one end of the top rod 503 is fixedly connected with the corresponding adjusting rod 501, the heat conduction plate 403 is in sliding connection with the push rod 504, a plurality of guide grooves 505 are opened on the push rod 504, and the other end of the top rod 503 is in sliding connection with the corresponding guide groove 505 through the slide rod 506.

[0042] One end of the push rod 504 is fixedly connected with the push plate 507, and the end of the cooling ring 401 close to the push plate 507 is provided with a plurality of accommodating cavities 508 corresponding to the push plate 507, and the push plate 507 is in sliding connection with the corresponding accommodating cavity 508.

[0043] The end of the push plate 507 away from the push rod 504 is filled with the thermal expansion gas 509 between the push plate 507 and the accommodating cavity 508, and the end of the push plate 507 close to the push rod 504 is connected with the accommodating cavity 508 through the elastic member 510.

[0044] The heat conduction fins 407 are fixedly connected to the inner walls of the two sides of the cooling ring 401, for transmitting heat to the accommodating cavities 508, and the insulating layer 408 and the waterproof layer 409 are fixed on the inner wall of the cooling ring 401.

[0045] In actual use, during the operation of the motor, the shaft 2 drives the fan 10 to rotate for heat dissipation. Since the micro pump is arranged in the shell 1 and connected with one of the flow guide cavities 404, the micro pump and the connection mode are prior art, and the specific structure will not be described here. At this time, the micro pump pumps the cooling liquid into the cooling groove 402 through one of the flow guide cavities 404. The cooling liquid flows in the cooling groove 402 and exchanges heat with the heat in the shell 1 through the heat conduction plate 403, thereby cooling the inside of the shell 1. The insulation layer 408 and the waterproof layer 409 not only ensure the insulation effect of the cooling groove 402 and the heat conduction plate 403, but also avoid the problem of cooling liquid in the cooling groove 402 leaking into the shell 1, ensuring the normal operation of the motor and avoiding the problem of magnet failure caused by the temperature process in the shell 1.

[0046] During the high-speed operation of the motor, the fan 10 has low heat dissipation efficiency for the inside of the motor, and the temperature in the shell 1 rises sharply. At this time, the heat is transferred to the containing cavity 508 through the heat conduction sheet 407. The thermal expansion gas 509 in the containing cavity 508 is heated and rapidly increases in volume. At this time, the thermal expansion gas 509 drives the push plate 507 to slide along the containing cavity 508, and the elastic member 510 is compressed. The push plate 507 drives the push rod 504 to slide along the heat conduction plate 403. Since the guide groove 505 is arranged in an inclined state, the heat conduction plate 403 drives the top rod 503 to slide away from the heat conduction plate 403 through the guide groove 505 and the sliding rod 506. The top rod 503 drives the adjusting rod 501 to slide. At this time, the adjusting rod 501 drives the two adjusting plates 502 to slide along the cooling groove 402. At this time, the included angle between the two adjusting plates 502 decreases, and the area of the adjusting plate 502 shielding the heat conduction plate 403 decreases, so that the cooling liquid better contacts the heat conduction plate 403 for heat exchange. At the same time, the cooling liquid flowing to the adjusting plate 502 and the adjusting rod 501 produces turbulent flow under the action of the adjusting plate 502, so that the cooling liquid flows and disturbs twice under the action of the adjusting plate 502, so that the laminar flow of the cooling liquid near the heat conduction plate 403 is destroyed, the thickness of the thermal boundary layer is reduced, and the efficiency of the cooling liquid for heat exchange is further increased, thereby improving the efficiency and effect of the cooling and heat dissipation of the motor inside.

[0047] When the temperature inside the motor gradually decreases, the heat dissipation volume of the thermal expansion gas 509 gradually decreases, and under the action of the elastic member 510, the elastic member 510 drives the push plate 507 to slide along the containing cavity 508, the push plate 507 drives the push rod 504 to slide in the direction of the elastic member 510, the push rod 504 drives the jacking rod 503 to slide in the direction of the heat conduction plate 403 through the guide groove 505 and the sliding rod 506, the jacking rod 503 drives the adjusting rod 501 to slide, the adjusting rod 501 drives the two adjusting plates 502 to slide along the cooling groove 402, the included angle between the two adjusting plates 502 increases, thereby reducing the resistance of the cooling liquid when passing through, further capable of reducing the energy consumption of the micro pump, and capable of dynamically adjusting the heat exchange efficiency of the cooling liquid and adaptively reducing the energy consumption.

[0048] In summary, through the linkage structure of the adjusting rod 501, the jacking rod 503, the adjusting plate 502, the push rod 504, the guide groove 505, the sliding rod 506 and the thermal expansion gas 509, not only when the heat dissipation efficiency inside the motor is insufficient, but also the adjusting rod 501 drives the adjusting plate 502 to increase the distance between the two, and the angle between the two adjusting plates 502 decreases, under the synergistic effect of multiple adjusting plates 502, the cooling liquid flowing through the adjusting plate 502 generates turbulent flow and secondary flow, at this time not only the cooling liquid increases the contact area with the heat conduction plate 403 to fully exchange heat, but also the turbulent flow generated by the cooling liquid destroys the laminar flow bottom layer of the cooling liquid, at the same time reduces the thickness of the cooling liquid thermal edge layer, further improves the cooling efficiency of the cooling liquid inside the shell 1, avoids the problem that the magnet fails in a high temperature environment, ensures that the motor can operate normally, and the two adjusting plates 502 can dynamically adjust the heat exchange efficiency of the cooling liquid under the change of the temperature inside the motor, and dynamically adjust the energy consumption.

[0049] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A direct-drive energy-saving motor, comprising a housing, a shaft rotatably connected to the center of the housing, and a stator core rotatably connected to the outer wall of the shaft, characterized in that: Also includes: A cooling assembly comprising a cooling ring fixedly connected to the inner wall of the housing, wherein the cooling ring is provided with a plurality of circumferentially distributed cooling grooves, and wherein heat conducting plates are fixed in the cooling grooves for guiding heat transfer; An adjustment assembly includes a plurality of adjustment rods slidably connected to the cooling groove, and two adjustment plates are hinged on the adjustment rods. The adjustment plates are slidably connected to the side walls of the cooling groove. When the temperature inside the shell rises, the adjustment rods drive the two adjustment plates to swing, so that the coolant in the cooling groove generates turbulence and secondary flow, thereby improving the heat exchange efficiency.

2. A direct-drive energy-saving motor according to claim 1, characterized in that: The cooling assembly includes two guide cavities opened in the cooling ring, the cooling groove is located between the two guide cavities, both ends of the cooling groove are connected to the guide cavities through through holes, and the two guide cavities are connected through a conduit.

3. A direct-drive energy-saving motor according to claim 2, characterized in that: The adjustment assembly includes a plurality of push rods slidably connected to the heat conducting plate, one end of the push rod is fixedly connected to the corresponding adjustment rod, a push rod is slidably connected inside the heat conducting plate, a plurality of guide grooves are provided on the push rod, and the other end of the push rod is slidably connected to the corresponding guide groove through a sliding rod.

4. A direct-drive energy-saving motor according to claim 3, characterized in that: One end of the push rod is fixedly connected to a push plate, and one end of the cooling ring close to the push plate is provided with a plurality of accommodating cavities corresponding to the push plates, and the push plates are slidably connected to the corresponding accommodating cavities.

5. A direct-drive energy-saving motor according to claim 4, characterized in that: Thermal expansion gas is filled between the end of the push plate away from the push rod and the accommodating cavity, and the end of the push plate close to the push rod is connected to the accommodating cavity through an elastic member.

6. A direct-drive energy-saving motor according to claim 5, characterized in that: Both sides of the cooling ring are fixedly connected with heat conducting sheets located on the inner wall thereof for transferring heat to the accommodating cavity.

7. A direct-drive energy-saving motor according to claim 6, characterized in that: An insulating layer and a waterproof layer are fixed on the inner wall of the cooling ring.

8. The direct-drive energy-saving motor according to claim 1, characterized in that: A material-saving excitation component is provided between the cooling component and the stator core, which is used for magnetic mixing and reasonable arrangement to reduce the amount of rare earth permanent magnets.

9. The direct-drive energy-saving motor according to claim 1, characterized in that: Both ends of the shell are fixed with mounting covers, and both ends of the shaft are rotatably connected to the mounting covers through bearings.

10. The direct-drive energy-saving motor according to claim 1, characterized in that: A heat dissipation cover is fixed on one end of the shell, one end of the shaft extends into the heat dissipation cover and is provided with a fan, and a plurality of circumferentially distributed heat dissipation fins are fixed on the outer side of the shell.

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