Variable flux type magnetic coupler capable of air cooling and liquid cooling heat dissipation

Abstract

The application discloses a variable magnetic flux type magnetic coupler capable of realizing air cooling and liquid cooling heat dissipation, comprising a driving unit, a driven unit and a cooling liquid injection unit; the driving unit is connected with a power input end, the driven unit is connected with a power output end, the driving unit and the driven unit are respectively provided with corresponding conductors and permanent magnets, electromagnetic field coupling transmission is realized by using the conductors and the permanent magnets, and the adjustment of the magnetic flux is realized by adjusting the position of the permanent magnet; the cooling liquid injection unit comprises a cam transmission mechanism, a plunger pump and an injection mechanism; the cam transmission mechanism is connected with the power input end and moves synchronously with the power input end; the cam transmission mechanism is movably connected with plungers of the plunger pump, and the rotation is converted into the linear motion of the plungers by the cam transmission mechanism; the plunger pump is connected with the injection mechanism through a pipeline, and the cooling liquid is injected to the driving unit and the driven unit by the injection mechanism to cool the driving unit and the driven unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transmission in mechanical engineering, in particular to a variable flux type magnetic coupling capable of air cooling and liquid cooling heat dissipation. BACKGROUND

[0002] In actual industrial applications, the energy consumption of motor driving accounts for a large proportion, among which the load of fan and pump cannot be ignored. In the speed regulation of fan and pump load, the magnetic coupling as an important speed regulation device, through the non-contact coupling between the driving disc and the driven disc, forms electromagnetic field coupling to realize the transmission of torque and speed. Due to the simple structure of the magnetic coupling, it has high operation reliability and relatively low maintenance cost. The non-contact transmission mode makes it have lower requirements for working environment and centering. After years of development, the magnetic coupling has been widely concerned by various industries. Its excellent speed regulation performance and energy saving effect play an important role in saving energy for industrial production.

[0003] During the operation of the magnetic coupling, the eddy current loss generated by the induced current in the conductor disc is released in the form of joule heat, which continuously raises the working temperature of each component of the magnetic coupling. When the working temperature is too high and cannot be cooled in time, the temperature of the permanent magnet will be too high, which will cause magnetic decay or even permanent demagnetization, thereby affecting the operation efficiency of the whole transmission system. In view of the problem of heat generation of the magnetic coupling, the magnetic coupling is usually cooled by air cooling, liquid cooling and other methods, for example, air cooling by adding cooling fins, or cooling by directly spraying cooling liquid on the heating parts of the magnetic coupling by using a spraying device. However, the above cooling methods still have some deficiencies, for example, the cooling effect of air cooling is poor, and liquid cooling needs an additional kinetic energy system for separate control. SUMMARY

[0004] In order to solve the problems existing in the prior art, the present application provides a variable flux type magnetic coupling capable of air cooling and liquid cooling heat dissipation. The magnetic coupling can adjust the position of the permanent magnet to realize adjustable magnetic flux. The magnetic coupling can also realize self-adjustment of the cooling effect according to the operating state of the coupling, improve the heat dissipation effect of the coupling and ensure the stability of the operation.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A variable flux type magnetic coupling capable of air cooling and liquid cooling heat dissipation, comprising a driving unit, a driven unit and a cooling liquid spraying unit.

[0007] The driving unit is connected with a power input end, the driven unit is connected with a power output end, the driving unit and the driven unit are respectively provided with corresponding conductors and permanent magnets, electromagnetic field coupling transmission is realized by using the conductors and the permanent magnets, and an air gap is left between the driving unit and the driven unit; and the magnetic flux of the permanent magnet is adjustable.

[0008] The cooling liquid injection unit comprises a cam transmission mechanism, a plunger pump and an injection mechanism; the cam transmission mechanism is connected with a power input end and moves synchronously; the cam transmission mechanism is movably connected with the plunger of the plunger pump, and converts rotation into linear motion of the plunger by the cam transmission mechanism; the plunger pump is connected with the injection mechanism through a pipeline, the injection mechanism is arranged towards the driving unit and the driven unit, and the cooling liquid is injected into the driving unit and the driven unit to cool the driving unit and the driven unit.

[0009] Further, the injection mechanism is a spray head connected at the end of the pipeline, and the cooling liquid pumped out of the plunger pump is dispersedly injected into the cooling area of the coupling by the spray head.

[0010] Further, the injection mechanism comprises a cooling water tank, the cooling water tank is communicated with the plunger pump through a pipeline, and a one-way valve is arranged at the connection between the cooling water tank and the pipeline; a plurality of water outlets are formed in the top cover of the cooling water tank and arranged towards the coupling, and the cooling liquid pumped into the cooling water tank by the plunger pump is injected into the cooling area of the coupling through the water outlets.

[0011] Further, a propeller is arranged in the cooling water tank and arranged towards the top cover.

[0012] Further, the one-way valve comprises a spring, a stop block and a plug body, the plug body is arranged at the connection between the cooling water tank and the pipeline, the plug body is connected with the stop block through the spring, and the stop block is fixed to the inner wall of the cooling water tank; in the non-stressed state of the spring, the plug body blocks the pipeline inlet; when the plunger pump pumps in the cooling liquid, the plug body is pushed away, and the cooling liquid is pumped into the cooling water tank; when the plunger pump stops pumping in the cooling liquid, the spring pushes the stop block to reset, and the pipeline inlet is blocked.

[0013] Further, the top of the plunger is rotatably connected with a pulley, and the pulley is in contact with the surface of the cam transmission mechanism.

[0014] Further, the cam transmission mechanism adopts a trisection cam.

[0015] Further, the permanent magnet adopts at least two coaxially arranged permanent magnet rings, the positions of the magnetic poles between adjacent permanent magnet rings are changed, and the magnetic flux is adjusted.

[0016] Further, the permanent magnet ring and the permanent magnet yoke are detachably connected.

[0017] Further, a water flow pipeline is formed in the surface of the conductor yoke.

[0018] Advantages of the present application:

[0019] 1. In the design of the present application, the permanent magnets are arranged in a ring structure and coaxially. By rotating to change the position of one layer of permanent magnet ring, the arrangement of adjacent permanent magnet poles can be realized, the overall magnetic flux can be changed, and then the speed and torque can be adjusted. Compared with the traditional axial movement of the gap between the permanent magnet disc and the conductor disc, this method increases a new idea of speed regulation.

[0020] 2. The cooling liquid injection unit in the present application is connected with the power input / output end through a cam mechanism, and a coupling is used as the power source for driving the cooling liquid injection unit, so that the cooling liquid injection unit does not need to be provided with a separate power source. In addition, since the cam mechanism will run synchronously with the input / output end, when the speed of the input / output end increases, the speed of the cam mechanism will also increase, thereby controlling the flow rate of the cooling liquid. During the rotation of the coupling, the temperature will gradually increase, which will reduce the performance and stability of the coupling. However, the addition of the heat dissipation device can more effectively dissipate heat for the coupling, so that the operation of the coupling will be more stable. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole schematic diagram of a variable magnetic flux type magnetic coupling device combined with air cooling and liquid cooling.

[0022] Figure 2 It is a three-dimensional structure schematic diagram of a variable magnetic flux type magnetic coupling device.

[0023] Figure 3 In the present application, (a) is a two-dimensional structure schematic diagram of a permanent magnet rotor, and (b) is a two-dimensional schematic diagram of magnetic flux change in the permanent magnet rotor.

[0024] Figure 4 It is an arrangement diagram of four variable magnetic flux states of the coupling permanent magnet.

[0025] Figure 5 It is a three-dimensional installation schematic diagram of the coupling permanent magnet disc.

[0026] Figure 6 It is an exploded three-dimensional structure schematic diagram of the copper conductor disc of the coupling.

[0027] Figure 7 It is a three-dimensional structure schematic diagram of the groove water pipeline built in the copper conductor yoke disc in the present application.

[0028] Figure 8 It is a three-dimensional structure schematic diagram of the conductor disc cooling fin and (b) flat head rivet in the present application.

[0029] Figure 9Coupling and cam mechanism cooperation transmission three-dimensional structure schematic diagram in the application.

[0030] Figure 10 Water tank three-dimensional structure schematic diagram of the heat dissipation device in the application.

[0031] Figure 11 Water tank internal structure cross section schematic diagram.

[0032] Figure 12 Three-equal-division cam structure transmission three-dimensional schematic diagram.

[0033] In the figure, 1, output shaft, 2, driven unit, 3, driving unit, 4, cam transmission mechanism, 5, input shaft, 6, outer box body, 7, cooling water tank, 8, plunger pump, 9, middle permanent magnet ring, 10, pin shaft, 11, internal permanent magnet ring, 12, external permanent magnet ring, 13, permanent magnet yoke, 14, pin hole, 15, conductor, 16, conductor yoke, 17, water flow pipeline, 18, cooling fin, 19, flange plate I, 20, flange plate II, 21, permanent magnet ring, 22, liquid inlet pipe, 23, flange plate III, 24, flange plate IV, 25, liquid outlet pipe, 26, plunger, 27, pulley, 28, water outlet hole, 29, top cover, 30, water tank body wall, 31, spring, 32, propeller, 33, stop block, 34, inlet hole, 35, outlet hole. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0035] Example 1

[0036] A variable magnetic flux type magnetic coupling capable of realizing air cooling and liquid cooling heat dissipation, comprising a driving unit, a driven unit and a cooling liquid injection unit; the driving unit is connected with a power input end and moves synchronously with the power input end. The driven unit is connected with a power output end and transmits power to the power output end.

[0037] The driving unit and the driven unit are oppositely arranged and an air gap is arranged between them. Permanent magnets and conductors are correspondingly arranged on the driving unit and the driven unit, and electromagnetic field coupling transmission is realized through the permanent magnets and the conductors to transmit power from the input end to the output end, as shown in Figure 2

[0038] In Figure 1 ​The shown design is taken as an example, the driving unit is connected with the input shaft 5 through flange plate III 23 and flange plate IV 24, and the driving unit is driven to rotate synchronously by the input shaft 5. The driven unit is connected with the output shaft 1 through flange plate I 19 and flange plate II 20, and the output shaft 1 is driven to rotate synchronously by the driven unit; since the driving unit and the driven unit are connected through magnetic force transmission, power transmission is realized.

[0039] In the design, the driving unit is provided with permanent magnets, and the driven unit is provided with conductors; of course, the driving unit can be provided with conductors, and the driven unit is provided with permanent magnets. The specific structure design is as follows: Figure 1 The driving unit comprises permanent magnet yoke 13 and at least two layers of coaxially arranged permanent magnet rings 21, and the N and S poles in each permanent magnet ring 21 in the embodiment are arranged alternately. As shown in

[0040] , a plurality of pin shafts 10 are arranged on the permanent magnet ring 21, and a pin hole 14 corresponding to the pin shaft 10 is formed on the permanent magnet yoke 13. The detachable connection of the permanent magnet ring 21 on the permanent magnet yoke 13 can be realized through the cooperation of the pin shaft 10 and the pin hole 14. Since the permanent magnet ring 21 is detachable, the installation position of the permanent magnet ring 21 can be changed, that is, the positions of the N and S poles in the adjacent permanent magnet rings 21 are changed as shown in Figure 5 , Figure 3 , 4 , and the overall magnetic flux can be changed, so that the rotation speed and torque are adjusted.

[0041] The driven unit comprises a conductor 15 and a conductor yoke 16 as shown in Figure 6 , 7 . The conductor yoke 16 is arrayed with yoke teeth, and the conductor 15 is clamped on the conductor yoke 16 through the yoke teeth. In the embodiment, the conductor 15 and the conductor yoke 16 are both made of copper.

[0042] The cooling liquid injection unit comprises a cam transmission mechanism 4, a plunger pump 8 and an injection mechanism; the cam transmission mechanism 4 is sleeved on the input shaft 5 and rotates synchronously with the input shaft 5. The plunger pump 8 comprises a plunger 26, one end of which is located in the pump body, and the other end is located outside the pump body. The end of the plunger 26 outside the pump body is rotatably connected with a pulley 27, and the pulley 27 is rollingly connected with the surface of the cam transmission mechanism 4 as shown in Figure 12 . Therefore, during the rotation of the cam transmission mechanism 4 with the input shaft 5, the cam transmission mechanism 4 regularly pushes the plunger 26 to reciprocate up and down in the pump body, converting the rotary motion of the input shaft 5 into the linear motion of the plunger 26. It should be noted that since the cam transmission mechanism 4 rotates synchronously with the input shaft 5, when the rotation speed of the input shaft 5 increases, the speed of the cooling liquid injection also increases synchronously, improving the cooling speed.

[0043] The plunger pump 8 is provided with an inlet hole 34 and an outlet hole 35. The inlet hole 34 is connected to the cooling liquid storage unit through the liquid inlet pipe 22, and the outlet hole 35 is connected to the cooling liquid spraying unit through the liquid outlet pipe 25. The cooling liquid spraying unit is arranged towards the driving unit and the driven unit, and sprays the cooling liquid to the driving unit and the driven unit to cool the driving unit and the driven unit. In this embodiment, the spraying mechanism is a spray head connected to the end of the liquid outlet pipe 25, and the cooling liquid pumped out of the plunger pump 8 is dispersed and sprayed to the cooling area of the coupling by the spray head.

[0044] More specifically, in order to more accurately adjust the positions of the N and S poles in the adjacent permanent magnet ring 21, the number of pin shafts 10 on the permanent magnet ring 21 can be set according to the central angle, for example, the pin shafts 10 and pin holes 14 are arranged at equal intervals of 5°, so that the permanent magnet ring 21 can rotate axially every 5°. The angle can be selected according to actual design needs.

[0045] More specifically, in order to improve the heat dissipation effect, a plurality of heat dissipation fins 18 can be arranged on the back of the conductor yoke 16, for example, Figure 8 As shown in (a), the heat dissipation fins 18 are fixedly installed by using flat head rivets shown in (b).

[0046] More specifically, the cam transmission mechanism 4 adopts a trisection cam, which can ensure the stability of the uniform speed of the plunger pump 8, thereby realizing the sequential reciprocating motion.

[0047] More specifically, in order to avoid the splashing of cooling liquid during work, the coupling can be equipped with an outer box 6, and the driving unit, the driven unit and the cooling liquid spraying unit are all enclosed in the outer box 6. The coupling can also be separately equipped with a semi-enclosed outer cover.

[0048] Embodiment 2 is based on the design of Embodiment 1. If the spraying mechanism adopts a spray head, when the size of the coupling is too large, the spray head cannot meet the cooling requirements, and when the input shaft rotates too fast, the spray head device may be damaged due to its inability to withstand the pressure. To solve this problem, another cooling liquid spraying unit is designed in this embodiment, which includes a cooling water tank 7. The cooling water tank 7 is connected to the plunger pump 8 through a liquid outlet pipe 25, and a one-way valve is arranged at the connection between the cooling water tank 7 and the liquid outlet pipe 25 to prevent backflow of the liquid. As shown in Figure 10 The top cover 29 of the cooling water tank 7 is provided with a plurality of water outlet holes 28 arranged towards the coupling. During work, the cooling liquid pumped into the cooling water tank 7 has a certain flow rate, so the cooling liquid will impact the wall surface of the cooling water tank 7 and then be sprayed from the water outlet holes 28 to the cooling area of the coupling. Through the design of the cooling water tank 7, the initial water pressure can be avoided to damage the equipment, which can play a buffering effect at the start and can more flexibly control the water pressure.

[0049] The one-way valve in this embodiment is as follows: Figure 11 As shown, the valve includes a spring 31, a stop block 33, and a plug. The plug is located at the connection between the cooling water tank 7 and the pipeline. The plug is connected to the stop block 33 via the spring 31, and the stop block 33 is fixed to the inner wall of the cooling water tank 7. When the spring 31 is not under stress, the plug blocks the pipeline inlet. When the plunger pump 8 pumps in coolant, it pushes open the plug, pumping the coolant into the cooling water tank 7. When the plunger pump 8 stops pumping coolant, the spring 31 pushes the stop block 33 back to its original position, blocking the pipeline inlet. Other forms of check valves are also possible.

[0050] More specifically, a propeller 32 can also be installed in the cooling water tank 7 of the aforementioned coolant injection unit. The propeller 32 can be used to further increase the speed of coolant injection and improve the cooling effect. Even when the input shaft 5 rotates at a low speed and the coolant injection speed is slow, the speed of coolant injection can be increased by the operation of the propeller 32.

[0051] Example 3

[0052] Based on the designs of embodiments 1 and 2 above, this application also proposes another form of permanent magnet design, such as... Figure 5 As shown, a three-layer coaxial permanent magnet ring 3 is used, consisting of an inner permanent magnet ring 11, a middle permanent magnet ring 9, and an outer permanent magnet ring 12 from radial to outward. The inner permanent magnet ring 11 and the outer permanent magnet ring 12 are directly fixedly mounted on the permanent magnet yoke 13, while only the middle permanent magnet ring 9 is detachably connected to the permanent magnet yoke 13 via a pin 10.

[0053] Similarly, all three permanent magnet rings 3 can be detachably connected to the permanent magnet yoke 13 using pins 10. However, when adjusting the magnetic flux, it is necessary to change the position of one or more of the rings.

[0054] Example 4

[0055] Based on the design of the above embodiments, in order to improve the heat dissipation effect, the present invention provides a water flow channel 17 on the surface of the conductor yoke 16, so that the coolant can flow into the surface of the conductor yoke 16 along the water flow channel 17, thereby improving the heat dissipation effect. Figure 7 As shown, multiple water pipes 17 are provided on the root surface of each yoke tooth on the conductor yoke 16, and coolant will flow into them, thereby improving the heat dissipation efficiency.

[0056] The above embodiments are only used to illustrate the design concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.

Claims

1. A variable flux type magnetic coupler capable of air cooling and liquid cooling heat dissipation, characterized by, The coupling device comprises a driving unit, a driven unit and a cooling liquid injection unit; The driving unit is connected with a power input end, the driven unit is connected with a power output end, the driving unit is provided with a permanent magnet, the driven unit is provided with a conductor, or the driving unit is provided with a conductor, and the driven unit is provided with a permanent magnet; an air gap is left between the driving unit and the driven unit; the conductor and the permanent magnet are used to realize electromagnetic field coupling transmission; the permanent magnet comprises a permanent magnet yoke (13) and at least two coaxially arranged permanent magnet rings (21), the permanent magnet rings (21) are detachably connected on the permanent magnet yoke (13), the installation positions of the permanent magnet rings (21) are changed, the positions of the magnetic poles between adjacent permanent magnet rings are changed, and the magnetic flux is adjusted; the conductor (15) is clamped on the conductor yoke (16) through yoke teeth. The cooling liquid injection unit comprises a cam transmission mechanism (4), a plunger pump (8) and an injection mechanism; the cam transmission mechanism (4) is connected with the power input end and moves synchronously; the cam transmission mechanism (4) is movably connected with a plunger (26) of the plunger pump (8), and rotates of the cam transmission mechanism (4) is converted into linear motion of the plunger (26); the plunger pump (8) is connected with the injection mechanism through a pipeline, the injection mechanism is arranged towards the driving unit and the driven unit, and the cooling liquid is injected into the driving unit and the driven unit to cool the driving unit and the driven unit; when the rotation speed of the input end / output end increases, the rotation speed of the cam transmission mechanism (4) is synchronously increased, and the flow rate of the cooling liquid is adjusted in real time. The injection mechanism is a nozzle connected at the end of the pipeline, and the cooling liquid pumped out of the plunger pump (8) is dispersedly injected into the cooling area of the coupling device by the nozzle. The injection mechanism comprises a cooling water tank (7), the cooling water tank (7) is communicated with the plunger pump (8) through a pipeline, and a one-way valve is arranged at the connection position of the cooling water tank (7) and the pipeline; a plurality of water outlets (28) are formed in the top cover (29) of the cooling water tank (7) and arranged towards the coupling device, and the cooling liquid pumped into the cooling water tank (7) by the plunger pump is injected into the cooling area of the coupling device through the water outlets (28).

2. The variable flux magnetic coupler capable of air cooling and liquid cooling according to claim 1, characterized in that, A propeller (32) is arranged in the cooling water tank (7) and arranged towards the top cover (29).

3. The variable flux magnetic coupler capable of air cooling and liquid cooling according to claim 1, characterized in that, The one-way valve comprises a spring (31), a stop block (33) and a plug body, the plug body is arranged at the connection position of the cooling water tank (7) and the pipeline, the plug body is connected with the stop block (33) through the spring (31), and the stop block (33) is fixed to the inner wall of the cooling water tank (7); in the non-stressed state of the spring (31), the plug body blocks the pipeline inlet; when the plunger pump (8) pumps in the cooling liquid, the plug body is pushed away, and the cooling liquid is pumped into the cooling water tank (7); when the plunger pump (8) stops pumping in the cooling liquid, the spring (31) pushes the stop block (33) to reset, and blocks the pipeline inlet.

4. The variable flux magnetic coupler capable of air cooling and liquid cooling according to claim 1, characterized in that, The top of the plunger (26) is rotatably connected with a pulley (27), and the pulley (27) is in contact with the surface of the cam transmission mechanism (4).

5. The variable flux motor coupler of claim 1, wherein, The cam transmission mechanism (4) adopts a trisection cam.

6. The variable flux motor coupler of claim 1, wherein, A plurality of pin shafts (10) are arranged on the permanent magnet ring (21), and a plurality of pin holes (14) corresponding to the pin shafts (10) are arranged on the permanent magnet yoke (13); the permanent magnet ring and the permanent magnet yoke (13) are detachably connected through cooperation of the pin shafts (10) and the pin holes (14).

7. The variable flux motor coupler of claim 1, wherein, A water flow pipeline (17) is arranged on the surface of the conductor yoke (16).

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