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

Abstract

The invention discloses a variable magnetic flux type magnetic coupler capable of realizing air cooling and liquid cooling heat dissipation. The variable magnetic flux type magnetic coupler comprises a driving unit, a driven unit and a cooling liquid spraying unit, the driving unit is connected with the power input end, the driven unit is connected with the power output end, the driving unit and the driven unit are provided with a conductor and a permanent magnet which correspond to each other respectively, electromagnetic field coupling transmission is achieved through the conductor and the permanent magnet, and magnetic flux adjustment is achieved by adjusting the position of the permanent magnet; the cooling liquid spraying unit comprises a cam transmission mechanism, a plunger pump and a spraying mechanism; the cam transmission mechanism and the power input end are connected and move synchronously; the cam transmission mechanism is movably connected with a plunger of the plunger pump, and rotation is converted into linear motion of the plunger through the cam transmission mechanism. The plunger pump is connected with the spraying mechanism through a pipeline, the spraying mechanism sprays cooling liquid to the driving unit and the driven unit, and the driving unit and the driven unit are cooled.

Description

Technical Field

[0001] The invention relates to the transmission field in mechanical engineering, and in particular to a variable magnetic flux type magnetic coupler capable of realizing air cooling and liquid cooling. Background Art

[0002] In actual industrial applications, the energy consumption of motor drag accounts for a large proportion, among which the load of fans and pumps cannot be ignored. In the speed regulation of fans and pumps, the magnetic coupling is an important speed regulation device. It forms electromagnetic field coupling through the contactless connection between the active disk and the driven disk to achieve the transmission of torque and speed. Due to the simple structure of the magnetic coupling, it has high operating reliability and relatively low maintenance cost. The contactless transmission method makes it have low requirements on the working environment and neutrality. After years of development, the magnetic coupling has received widespread attention from all walks of life. Its excellent speed regulation performance and energy-saving effect have played an important role in helping industrial production save energy.

[0003] During the operation of the magnetic coupling, the eddy current loss generated by the induced current in the conductor disk is released in the form of Joule heat, causing the operating temperature of the various components of the magnetic coupling to continue to rise. When the operating temperature is too high and is not cooled in time, the permanent magnet temperature will be too high, resulting in magnetic decay or even permanent demagnetization, which will affect the operating efficiency of the entire transmission system. In order to solve the heating problem of the magnetic coupling, the magnetic coupling is usually cooled by air cooling, liquid cooling, etc. For example, air cooling is performed by adding heat sinks, or a spray device is used to directly spray coolant on the heating parts of the magnetic coupling for cooling. However, the above cooling methods still have shortcomings. For example, the cooling effect of air cooling is poor, and liquid cooling requires an additional kinetic energy system for separate regulation. Summary of the invention

[0004] In order to address the deficiencies in the prior art, the present application proposes a variable flux magnetic coupler that can achieve air cooling and liquid cooling. The magnetic coupler can adjust the position of the permanent magnet to achieve adjustable magnetic flux; the magnetic coupler can also achieve self-adjustment of the cooling effect according to the operating state of the coupler, thereby improving the heat dissipation effect of the coupler and ensuring the stability of operation.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A variable flux type magnetic coupler capable of achieving air cooling and liquid cooling, comprising an active unit, a driven unit and a coolant spraying unit;

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

[0008] The coolant injection unit includes a cam transmission mechanism, a plunger pump and an injection mechanism; the cam transmission mechanism is connected to the power input end, and the two move synchronously; the cam transmission mechanism is movably connected to the plunger of the plunger pump, and the cam transmission mechanism converts the rotation into the linear motion of the plunger; the plunger pump is connected to the injection mechanism through a pipeline, and the injection mechanism is arranged toward the active unit and the driven unit, and the coolant is sprayed to the active unit and the driven unit to cool down the active unit and the driven unit.

[0009] Furthermore, the spray mechanism is a spray head connected to the end of the pipeline, and the spray head is used to disperse and spray the coolant pumped out by the plunger pump to the cooling area of ​​the coupler.

[0010] Furthermore, the injection mechanism includes a cooling water tank, which is connected to the plunger pump through a pipeline, and a one-way valve is provided at the connection between the cooling water tank and the pipeline; a plurality of water outlet holes are opened on the top cover of the cooling water tank, and the water outlet holes are arranged toward the coupler, and the coolant pumped into the cooling water tank by the plunger pump is sprayed to the cooling area of ​​the coupler through the water outlet holes.

[0011] Furthermore, a propeller is provided in the cooling water tank, and the propeller is arranged toward the top cover.

[0012] Furthermore, the one-way valve includes a spring, a block and a plug body, the plug body is located at the connection between the cooling water tank and the pipeline, the plug body is connected to the block through the spring, and the block is fixed to the inner wall of the cooling water tank; when the spring is not under stress, the plug body blocks the pipeline inlet; when the plunger pump pumps in the coolant, the plug body is pushed open to pump the coolant into the cooling water tank; when the plunger pump stops pumping in the coolant, the spring pushes the block to return to its original position to block the pipeline inlet.

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

[0014] Furthermore, the cam transmission mechanism adopts a cam divided into three parts.

[0015] Furthermore, the permanent magnets include at least two layers of coaxially arranged permanent magnet rings, and the positions of magnetic poles between adjacent permanent magnet rings are changed to adjust the magnetic flux.

[0016] Furthermore, the permanent magnet ring is detachably connected to the permanent magnet yoke.

[0017] Furthermore, a water flow pipe is provided on the surface of the conductor yoke.

[0018] Beneficial effects of the present invention:

[0019] 1. In the design of the present invention, the permanent magnets are in an annular structure and are arranged coaxially. By rotating and changing the position of one layer of the permanent magnet ring, the arrangement of adjacent permanent magnet poles can be achieved, 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 disk and the conductor disk, this method adds a new idea for speed regulation.

[0020] 2. The coolant spray unit in the present invention is connected to the power input / output end through a cam mechanism, and a coupler is used as a power source to drive the coolant spray unit, so there is no need to provide power for the coolant spray unit separately. 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 coolant outflow. As the coupler rotates, the temperature will gradually increase, causing the performance and stability of the coupler to decrease. The addition of this heat dissipation device can dissipate heat from the coupler more effectively, so that the operation of the coupler will be more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is an overall schematic diagram of a heat dissipation device of a variable flux type magnetic coupler combined with air cooling and liquid cooling.

[0022] Figure 2 Schematic diagram of the three-dimensional structure of a variable flux magnetic coupler.

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

[0024] Figure 4 This is the arrangement diagram of the four variable flux states of the coupler permanent magnet.

[0025] Figure 5 A three-dimensional diagram showing the installation of the coupler permanent magnet disk.

[0026] Figure 6 Schematic diagram of the exploded three-dimensional structure of the coupler copper conductor disk.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the water pipe with built-in grooves in the copper conductor yoke iron disk of the present invention.

[0028] Figure 8 Schematic diagram of the three-dimensional structure of the conductor disk heat sink and (b) the flat head rivet in the present invention.

[0029] Fig. 9It is a schematic diagram of the three-dimensional structure of the transmission of the coupler and the cam mechanism in the present invention.

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the water tank of the heat dissipation device in the present invention.

[0031] Fig.11 This is a schematic diagram of the cross-section of the internal structure of the water tank.

[0032] Fig.12 It is a three-dimensional schematic diagram of a three-divided cam structure transmission.

[0033] In the figure, 1, output shaft, 2, driven unit, 3, active 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, inner permanent magnet ring, 12, outer permanent magnet ring, 13, permanent magnet yoke, 14, pin hole, 15, conductor, 16, conductor yoke, 17, water pipe, 18, heat sink, 19, flange I, 20, flange II, 21, permanent magnet ring, 22, liquid inlet pipe, 23, flange III, 24, flange IV, 25, liquid outlet pipe, 26, plunger, 27, pulley, 28, water outlet hole, 29, top cover, 30, water tank wall, 31, spring, 32, propeller, 33, stopper, 34, inlet hole, 35, outlet hole. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] Example 1

[0036] A variable flux magnetic coupler capable of achieving air cooling and liquid cooling comprises an active unit, a passive unit and a coolant spray unit; the active unit is connected to a power input end and moves synchronously with the power input end; the passive unit is connected to a power output end and transmits power to the power output end.

[0037] The active unit and the driven unit are arranged opposite to each other with an air gap between them. Permanent magnets and conductors are arranged on the active unit and the driven unit respectively, and electromagnetic field coupling transmission is realized through the permanent magnets and conductors to transfer the power of the input end to the output end. Figure 2 shown.

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

[0039] exist Figure 1 In the design, the active unit is provided with a permanent magnet, and the passive unit is provided with a conductor; of course, the active unit can also be provided with a conductor, and the passive unit is provided with a permanent magnet. The specific structural design is:

[0040] The active unit includes a permanent magnet yoke 13 and at least two layers of coaxially arranged permanent magnet rings 21. In this embodiment, the N and S poles of each permanent magnet ring 21 are arranged alternately. Figure 5 , a plurality of pins 10 are provided on the permanent magnet ring 21, and pin holes 14 corresponding to the pins 10 are provided on the permanent magnet yoke 13. The permanent magnet ring 21 can be detachably connected to the permanent magnet yoke 13 by the cooperation between the pins 10 and the pin holes 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 can be changed. Figure 3 , 4 As shown, the overall magnetic flux can be changed to adjust the speed and torque.

[0041] Driven unit such as Figure 6 , 7 As shown, it includes a conductor 15 and a conductor yoke 16. The conductor yoke 16 is provided with yoke teeth in an array, and the conductor 15 is clamped on the conductor yoke 16 through the yoke teeth. In this embodiment, the conductor 15 and the conductor yoke 16 are both made of copper.

[0042] The coolant injection unit includes 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 includes a plunger 26, one end of the plunger 26 is located in the pump body, and the other end is located outside the pump body. The end of the plunger 26 located outside the pump body can be rotatably connected to a pulley 27, and the pulley 27 is rollingly connected to the surface of the cam transmission mechanism 4 as shown in FIG. Fig.12 Therefore, when the cam transmission mechanism 4 rotates with the input shaft 5, the cam transmission mechanism 4 will regularly push the plunger 26 to reciprocate up and down in the pump body, converting the rotational motion of the input shaft 5 into the linear motion of the plunger 26. It should be noted that because the cam transmission mechanism 4 rotates synchronously with the input shaft 5, when the speed of the input shaft 5 increases, the speed of the coolant injection will also increase synchronously, thereby 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 coolant storage unit through the liquid inlet pipe 22, and the outlet hole 35 is connected to the coolant injection unit through the liquid outlet pipe 25. The coolant injection unit is arranged toward the active unit and the driven unit, and injects the coolant to the active unit and the driven unit to cool the active unit and the driven unit. In this embodiment, the injection mechanism is a nozzle connected to the end of the liquid outlet pipe 25, and the nozzle is used to disperse and inject the coolant pumped out by the plunger pump 8 to the cooling area of ​​the coupler.

[0044] More specifically, in order to more accurately adjust the positions of the N and S poles in adjacent permanent magnet rings 21, the number of pins 10 on the permanent magnet ring 21 can be set according to the center angle of the circle. For example, the pins 10 and the pin holes 14 can be set at equal distances of 5°, so that the permanent magnet ring 21 can be rotated axially every 5°. The specific angle can be selected according to actual design requirements.

[0045] More specifically, in order to improve the heat dissipation effect, a plurality of heat sinks 18 may be provided on the back of the conductor yoke 16, such as Figure 8 As shown in (a), the heat sink 18 is fixedly installed using the flat head rivets shown in (b).

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

[0047] More specifically, in order to prevent the coolant from splashing everywhere during operation, the coupler can be equipped with an outer box 6, and the active unit, the driven unit and the coolant spraying unit can be enclosed in the outer box 6. The coupler can also be equipped with a semi-enclosed outer cover separately.

[0048] Embodiment 2 is based on the design of the above embodiment 1. If the spray mechanism adopts a spray head, when the size of the coupler is too large, the spray head cannot meet the cooling requirements. When the input shaft rotates too fast, the spray head device may be damaged because it cannot withstand its pressure. In view of this problem, this embodiment designs another coolant spray unit, including a cooling water tank 7, which is connected to a plunger pump 8 through a liquid outlet pipe 25. A one-way valve is provided at the connection between the cooling water tank 7 and the liquid outlet pipe 25 to prevent liquid reflux. Fig.10 , a plurality of water outlet holes 28 are provided on the top cover 29 of the cooling water tank 7, and the water outlet holes 28 are arranged toward the coupler. During operation, the coolant pumped into the cooling water tank 7 by the plunger pump has a certain flow rate, so the coolant will impact the wall of the cooling water tank 7, and then will be sprayed from the water outlet holes 28 to the cooling area of ​​the coupler. The design of the cooling water tank 7 can avoid the damage of the equipment due to excessive initial water pressure, can play a buffering effect at startup, and can more flexibly control the water pressure. .....

[0049] The one-way valve in this embodiment is as follows Fig.11 As shown, it includes a spring 31, a stopper 33 and a plug body, the plug body is located at the connection between the cooling water tank 7 and the pipeline, the plug body is connected to the stopper 33 through the spring 31, and the stopper 33 is fixed to the inner wall of the cooling water tank 7; when the spring 31 is not under force, the plug body blocks the pipeline inlet; when the plunger pump 8 pumps the coolant, the plug body is pushed open to pump the coolant into the cooling water tank 7; when the plunger pump 8 stops pumping the coolant, the spring 31 pushes the stopper 33 to reset and block the pipeline inlet. The one-way valve can also adopt other forms.

[0050] More specifically, a propeller 32 may be provided in the cooling water tank 7 of the coolant spraying unit, and the propeller 32 may be used to further increase the speed of coolant spraying and improve the cooling effect. Even when the speed of the input shaft 5 is low and the coolant spraying speed is slow, the speed of coolant spraying may be increased by the operation of the propeller 32.

[0051] Example 3

[0052] Based on the designs of the above embodiments 1 and 2, the present application also proposes another form of permanent magnet design, such as Figure 5 As shown, three layers of coaxially arranged permanent magnet rings 3 are used, which are respectively an inner permanent magnet ring 11, a middle permanent magnet ring 9, and an outer permanent magnet ring 12 from radially outward; wherein the inner permanent magnet ring 11 and the outer permanent magnet ring 12 are directly fixedly mounted on the permanent magnet yoke 13, and only the middle permanent magnet ring 9 is detachably connected to the permanent magnet yoke 13 through the pin 10.

[0053] Similarly, the three layers of permanent magnet rings 3 may all be detachably connected to the permanent magnet yoke 13 by the pin shaft 10. However, when adjusting the magnetic flux, only the position of one or more layers needs to be changed.

[0054] Example 4

[0055] Based on the design of the above embodiment, in order to improve the heat dissipation effect, the present invention opens a water pipe 17 on the surface of the conductor yoke 16 to facilitate the coolant to flow along the water pipe 17 into the surface of the conductor yoke 16, thereby improving the heat dissipation effect. Figure 7 As shown, a plurality of water pipes 17 are provided on the root surface of each yoke tooth on the conductor yoke 16, into which the coolant flows, thereby improving the heat dissipation efficiency.

[0056] The above embodiments are only used to illustrate the design ideas 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, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A variable flux magnetic coupler capable of achieving air cooling and liquid cooling, characterized in that: It includes a driving unit, a driven unit and a coolant injection unit; The active unit is connected to the power input end, and the driven unit is connected to the power output end. The active unit and the driven unit are respectively provided with corresponding conductors and permanent magnets, and the electromagnetic field coupling transmission is realized by using the conductors and permanent magnets. An air gap is left between the active unit and the driven unit; the magnetic flux of the permanent magnet is adjustable; The coolant injection unit comprises a cam transmission mechanism (4), a plunger pump (8) and an injection mechanism; the cam transmission mechanism (4) is connected to a power input end, and the two move synchronously; the cam transmission mechanism (4) is movably connected to a plunger (26) of the plunger pump (8), and the cam transmission mechanism (4) converts the rotation into the linear motion of the plunger (26); the plunger pump (8) is connected to the injection mechanism through a pipeline, and the injection mechanism is arranged toward the active unit and the driven unit, and injects the coolant to the active unit and the driven unit to cool the active unit and the driven unit.

2. A variable flux magnetic coupler capable of achieving air cooling and liquid cooling according to claim 1, characterized in that: The spray mechanism is a spray head connected to the end of the pipeline, and the spray head is used to disperse and spray the coolant pumped out by the plunger pump (8) to the cooling area of ​​the coupler.

3. The variable flux magnetic coupler capable of achieving air cooling and liquid cooling according to claim 1, characterized in that: The spray mechanism comprises a cooling water tank (7), the cooling water tank (7) is connected to a plunger pump (8) through a pipeline, and a one-way valve is provided at the connection between the cooling water tank (7) and the pipeline; a plurality of water outlet holes (28) are provided on a top cover (29) of the cooling water tank (7), the water outlet holes (28) are arranged toward the coupler, and the coolant pumped into the cooling water tank (7) by the plunger pump is sprayed to the cooling area of ​​the coupler through the water outlet holes (28).

4. The variable flux magnetic coupler capable of achieving air cooling and liquid cooling according to claim 3, characterized in that: A propeller (32) is provided in the cooling water tank (7), and the propeller (32) is arranged toward the top cover (29).

5. The variable flux magnetic coupler capable of achieving air cooling and liquid cooling according to claim 3, characterized in that: The one-way valve comprises a spring (31), a stopper (33) and a plug body, wherein the plug body is located at the connection between the cooling water tank (7) and the pipeline, the plug body is connected to the stopper (33) via the spring (31), and the stopper (33) is fixed to the inner wall surface of the cooling water tank (7); when the spring (31) is not under stress, the plug body blocks the pipeline inlet; when the plunger pump (8) pumps in coolant, the plug body is pushed open to pump the coolant into the cooling water tank (7); when the plunger pump (8) stops pumping in coolant, the spring (31) pushes the stopper (33) to return to its original position to block the pipeline inlet.

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

7. The variable flux magnetic coupler capable of achieving air cooling and liquid cooling according to claim 1, characterized in that: The cam transmission mechanism (4) adopts a cam divided into three parts.

8. The variable flux magnetic coupler capable of achieving air cooling and liquid cooling according to claim 1, characterized in that: The permanent magnet comprises at least two layers of coaxially arranged permanent magnet rings, and the positions of the magnetic poles between adjacent permanent magnet rings are changed to adjust the magnetic flux.

9. The variable flux magnetic coupler capable of achieving air cooling and liquid cooling according to claim 8, characterized in that: The permanent magnet ring is detachably connected to the permanent magnet yoke (13).

10. The variable flux magnetic coupler capable of achieving air cooling and liquid cooling according to claim 1, characterized in that: A water flow pipe (17) is provided on the surface of the conductor yoke (9).

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