Sealing structure of water-cooled permanent magnet speed regulator

Abstract

The utility model discloses a sealing structure of a water-cooled permanent magnet speed regulator, which comprises a motor, a load end and a heat dissipation cavity, a motor shaft of the motor is connected with a conductor rotor, a load shaft of the load end is connected with a permanent magnet rotor, the conductor rotor and the permanent magnet rotor are coupled and positioned in the heat dissipation cavity, the heat dissipation cavity is grounded, and a heat dissipation assembly is arranged on one side close to the motor shaft. A heat absorption cavity of the heat dissipation assembly is attached to the conductor rotor, the continuous heat dissipation assembly is connected to the load shaft and attached to the permanent magnet rotor, and the continuous heat dissipation assembly is kept static. The cooling device has the advantages that cooling water enters the heat absorption cavity through pressure, heat transfer with the conductor rotor is achieved, the conductor rotor is cooled, meanwhile, the movable plate extrudes the pressure spring and moves towards the fixed plate to expose the water outlet under the action of centrifugal force, the higher the rotating speed is, the larger the exposed area of the water outlet is, the more cooling water flows out, waste is reduced, and the heat dissipation efficiency is improved; the water absorption sponge is used for absorbing cooling water flowing out of the water outlet and is attached to the permanent magnet rotor for continuous cooling and heat dissipation, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of speed governors, in particular to a sealing structure of a water-cooled permanent magnet speed governor. Background Technique

[0002] When there is relative movement between a conductor rotor and a permanent magnet rotor, the conductor assembly cuts the magnetic force lines, generating eddy currents in the conductor. The eddy currents then generate a reactive magnetic field, which interacts with the magnetic field generated by the permanent magnet, thereby realizing torque transmission between the two. By adjusting the relative position of the permanent magnet rotor and the conductor rotor in the axial direction, the effective part of the coupling between the permanent magnet rotor and the conductor rotor can be changed, and thus the torque transmitted between the two can be changed, so as to achieve the purpose of speed regulation.

[0003] Chinese Patent Publication No.: CN207321044U discloses a permanent magnet speed governor with a centrifugal water-cooling device, which includes a driving rotating assembly and a driven rotating assembly. The driving rotating component includes a first cylindrical body in a cylindrical shape. A plurality of annularly arranged suction holes are provided on the first cylindrical body. A dehydrating disc is provided outside the first cylindrical body. A water flow channel is provided between the dehydrating disc and the outside of the first cylindrical body, and the water flow channel is communicated with the suction holes. However, the above device has the following defects in use:

[0004] 1. The driving rotating assembly and the driven rotating assembly are the conductor rotor and the permanent magnet rotor respectively. This device needs to be processed, which is difficult, has low universality, and is not easy to promote and use.

[0005] 2. The water flow is guided by centrifugal force for heat dissipation, and heat can only be taken away when it contacts the conductor rotor or the permanent magnet rotor. The heat dissipation efficiency is not high. If both the conductor rotor and the permanent magnet rotor are submerged in the water flow, the conductor rotor needs to overcome the water resistance, and at this time, more energy consumption is required for the motor to rotate. Content of the Utility Model

[0006] The technical problem to be solved by the utility model is that the processing difficulty of some structures of the existing device is high and it is not easy to promote; at the same time, the water spraying efficiency is not high during water-cooling heat dissipation, and submerging all in water will increase energy consumption; in view of the above problems, a sealing structure of a water-cooled permanent magnet speed governor is proposed, which includes a motor, a load end and a heat dissipation cavity. The motor shaft of the motor is connected to the conductor rotor, the load shaft of the load end is connected to the permanent magnet rotor, the conductor rotor and the permanent magnet rotor are coupled and located in the heat dissipation cavity, the heat dissipation cavity is on the ground, the heat dissipation assembly is arranged on one side close to the motor shaft, the heat absorption cavity of the heat dissipation assembly is attached to the conductor rotor, the continuous heat dissipation assembly is connected to the load shaft and attached to the permanent magnet rotor, and the continuous heat dissipation assembly remains stationary.

[0007] The technical solution of the present utility model is to set the structure of the heat dissipation component. The cooling water is pressed into the water storage bin by pressure and then enters the heat absorption cavity through the water guiding ring, where it exchanges heat with the conductor rotor to cool it down. Due to the rotation of the conductor rotor, under the action of centrifugal force, the movable plate will squeeze the pressure spring and move towards the fixed plate, exposing the water outlet. The cooling water flows out directly to dissipate heat from the conductor rotor. Moreover, the faster the rotation speed, the larger the exposed area of the water outlet and the more cooling water flows out, reducing waste and improving the heat dissipation efficiency. By setting the structure of the continuous heat dissipation component, the water absorption sponge is used to absorb the cooling water and fit with the permanent magnet rotor to continuously cool and dissipate heat. The continuous heat dissipation component is connected to the load shaft through a bearing, which will not affect the adjustment of the coupling distance between the conductor rotor and the permanent magnet rotor. At the same time, it can also ensure that the water absorption sponge always remains stationary, preventing it from rotating with the load shaft and causing the cooling water to be thrown out of the water absorption sponge, thus affecting the heat dissipation efficiency.

[0008] Preferably, a support is provided at the bottom of the heat dissipation cavity. A drain hole is provided in the middle of the bottom of the heat dissipation cavity. A sponge cushion is provided above the drain hole. The support is used for grounding and supporting, the drain hole is used to drain excess cooling water, and the sponge cushion is used for filtering to prevent external impurities from entering the heating cavity and damaging the internal structure.

[0009] Preferably, the heat dissipation component includes a water storage cavity. The water storage cavity is sleeved on the motor shaft and connected to the inner wall of the heat dissipation cavity. The water inlet of the water storage cavity passes through and extends out of the top of the heat dissipation cavity. One end of the water guiding ring is rotatably connected to the end face of the water storage cavity, and the other end is connected to the heat absorption cavity. A plurality of water outlets are provided at the edge of the heat absorption cavity, and the water outlets are located outside the end face of the conductor rotor. The side wall of the heat absorption cavity extends axially to form a fixed plate, which faces the permanent magnet rotor. A guiding column is provided inside the fixed plate. The movable plate passes through the guiding column, and the pressure spring is sleeved on the guiding column and located between the fixed plate and the movable plate. The water storage bin introduces cooling water through the water inlet and maintains a certain pressure. The cooling water flows into the heat absorption cavity through the water guiding ring and absorbs the heat of the conductor rotor through heat transfer. A sealing ring is provided at the connection surface between the water guiding ring and the water storage cavity for sealing. When the conductor rotor rotates, due to the action of centrifugal force, the movable plate will squeeze the pressure spring and move towards the fixed plate, and the cooling water is thrown out from the water outlet, directly dissipating heat from the conductor rotor.

[0010] Preferably, one side of the movable plate is attached to the end face of the heat dissipation cavity and blocks the water outlet. As the rotation speed of the conductor rotor increases, the centrifugal force becomes larger, the displacement of the movable plate increases, the exposed water outlet becomes larger, and more cooling water is thrown out, resulting in higher heat dissipation efficiency.

[0011] For the optimization of the technical solution of the present utility model, the continuous heat dissipation component includes a bearing sleeved on the load shaft. The water blocking plate is connected to the outer ring of the bearing. The water absorbing sponge is arranged on the water blocking plate and fits with the permanent magnet rotor. The bearing ensures the connection between the water blocking plate and the load shaft and can remain stationary. The water absorbing sponge absorbs the thrown-out cooling water to dissipate heat from the continuous permanent magnet rotor, with higher heat dissipation efficiency.

[0012] For the optimization of the technical solution of the present utility model, the cross-section of the water blocking plate is in a "C" shape, and the side wall of the water blocking plate is located outside the side wall of the heat absorption cavity. The water blocking plate can intercept most of the cooling water, preventing it from being directly thrown out and discharged from the heat dissipation cavity through the drain hole, ensuring that the water absorbing sponge can absorb sufficient cooling water.

[0013] For the optimization of the technical solution of the present utility model, the side wall of the water blocking plate is evenly provided with openings for the seepage of cooling water. After the water absorbing sponge is filled with cooling water, the excess cooling water is discharged through the openings and the gap between the water blocking plate and the side wall of the heat absorption cavity.

[0014] The beneficial effects of the present utility model compared with the prior art are as follows:

[0015] In the technical solution of the present utility model, by setting the structure of the heat dissipation component, the cooling water is pressed into the water storage bin by pressure and then enters the heat absorption cavity through the water guiding ring to exchange heat with the conductor rotor for cooling it. And due to the rotation of the conductor rotor, under the action of centrifugal force, the movable plate will squeeze the pressure spring and move towards the fixed plate, exposing the water outlet. The cooling water flows out to directly dissipate heat from the conductor rotor. And when the rotation speed is faster, the exposed area of the water outlet is larger, and more cooling water flows out, reducing waste and improving the heat dissipation efficiency; by setting the structure of the continuous heat dissipation component, the water absorbing sponge is used to absorb the cooling water and fit with the permanent magnet rotor to continuously cool and dissipate heat from it. The continuous heat dissipation component is connected to the load shaft through a bearing, which will not affect the adjustment of the coupling distance between the conductor rotor and the permanent magnet rotor. At the same time, it can also ensure that the water absorbing sponge always remains stationary, avoiding it rotating with the load shaft and causing the cooling water to be thrown out of the water absorbing sponge, affecting the heat dissipation efficiency. Description of the Drawings

[0016] Figure 1 It is a schematic cross-sectional view of the present utility model;

[0017] Figure 2 It is a partially enlarged schematic view of the present utility model;

[0018] Figure 3 It is an exploded schematic view of the structures of the heat dissipation component and the continuous heat dissipation component of the present utility model;

[0019] Wherein: 1 - motor, 11 - motor shaft, 12 - conductor rotor, 2 - load shaft, 21 - permanent magnet rotor, 3 - heat dissipation cavity, 31 - support, 32 - drain hole, 33 - sponge cushion, 4 - heat dissipation component, 41 - water storage cavity, 42 - water inlet, 43 - water diversion ring, 44 - heat absorption cavity, 45 - water outlet, 46 - fixing plate, 47 - movable plate, 48 - guide post, 49 - pressure spring, 5 - continuous heat dissipation component, 51 - water blocking plate, 52 - water absorbing sponge, 53 - bearing. Specific embodiments

[0020] The following will combine the attached drawings in the embodiments of the present utility model Figures 1-3 to describe in detail the technical solutions in the embodiments of the present utility model. Embodiment 1

[0021] As Figures 1-3 shown, the present utility model is a sealing structure of a water-cooled permanent magnet speed regulator, including a motor 1, a load end, and a heat dissipation cavity 3. The motor shaft 11 of the motor 1 is connected to the conductor rotor 12, the load shaft 2 of the load end is connected to the permanent magnet rotor 21, and the conductor rotor 12 is coupled with the permanent magnet rotor 21 and is located in the heat dissipation cavity 3.

[0022] The bottom of the heat dissipation cavity 3 is fixedly connected to the support 31. The support 31 is directly on the ground. The middle of the bottom of the heat dissipation cavity 3 is recessed to form a drain hole 32. The drain hole 32 is used to drain the excess cooling water in the heat dissipation cavity 3, and is convenient for collection and recycling. A layer of sponge cushion 33 is placed above the drain hole 32. The sponge cushion 33 can prevent external impurities from entering the heating cavity 3, affecting normal operation or even damaging the internal structure.

[0023] The heat dissipation component 4 is mainly used to dissipate heat from the conductor rotor 12. The heat dissipation component 4 includes an annular water storage cavity 41. The middle of the water storage cavity 41 is sleeved on the motor shaft 11 and is fixedly connected to the inner wall of the heat dissipation cavity 3. The water inlet 42 of the water storage cavity 41 penetrates through the top of the heat dissipation cavity 3. A circular water flow groove is recessed in the middle of the end face of the water storage cavity 41 facing the conductor rotor 12.

[0024] The heat absorption cavity 44 is circular. One end face of the heat absorption cavity 44 is attached to the conductor rotor 12, and the other end face of the heat absorption cavity 44 is connected to the water diversion ring 43. The water diversion ring 43 is a hollow ring. One end of the water diversion ring 43 is communicated with the inner cavity of the heat absorption cavity 44. The other end of the water diversion ring 43 extends into the water flow groove. The outer wall of the water diversion ring 43 is attached to the water flow groove, and a sealing gasket is placed on the joint surface.

[0025] The pressure is used to make the cooling water enter the water storage chamber 41, and then enter the heat absorption chamber 44 through the water diversion ring 43. The conductor rotor 12 is cooled through heat transfer. Since the water storage chamber 41 is fixed, the heat absorption chamber 44 is in contact with and rotates together with the conductor rotor 12. There is relative movement between the two. The sealing gasket can further increase the sealing performance and prevent the cooling water from leaking from the joint surface, so that normal heat dissipation cannot be carried out.

[0026] The end face edge of the heat absorption chamber 44 away from the water storage chamber 41 is concave to form a plurality of water outlets 45. The water outlets 45 are evenly distributed. Since the maximum diameter of the heat absorption chamber 44 is larger than the diameter of the conductor rotor 12, a part of the heat absorption chamber 44 is located outside the end face of the conductor rotor 12, and the water outlets 45 are all located in this part.

[0027] The side wall of the heat absorption chamber 44 protrudes axially to form a fixing plate 46. The fixing plate 46 faces the permanent magnet rotor 21. The inner side of the fixing plate 46 protrudes towards the center of the circle to form a plurality of groups of guide posts 48. Each water outlet 45 corresponds to a group of guide posts 48. There is still a certain distance between the innermost end of the guide post 48 and the side wall of the conductor rotor 12. The movable plate 47 passes through the guide post 48. The innermost end of the guide post 48 is limited to prevent the movable plate 47 from completely disengaging from the guide post 48. The compression spring 49 is sleeved on the guide post 48. The two ends of the compression spring 49 are respectively in contact with the fixing plate 46 and the movable plate 47.

[0028] When at rest, the movable plate 47 is affected by the compression spring 49, and its side wall is in contact with the end face of the heat absorption chamber 44 and completely blocks the water outlet 45 and remains stationary. When the conductor rotor rotates, affected by the centrifugal force, the movable plate 47 squeezes the compression spring 49 and displaces along the extending direction of the guide post 48 towards the fixing plate 46, and the water outlet 45 is exposed. The cooling water flows out under the combined action of pressure and centrifugal force, directly dissipating heat from the conductor rotor 12. The faster the rotation speed, the greater the centrifugal force, the larger the exposed area of the water outlet 45, the more cooling water flows out, the better the heat dissipation effect, while reducing the waste of water resources and improving the heat dissipation efficiency. At the same time, since the external water supply maintains a certain pressure, the cooling water is sufficient and the operation can be maintained continuously.

[0029] The continuous heat dissipation assembly 5 is mainly used for dissipating heat from the permanent magnet rotor 21. The continuous heat dissipation assembly 5 includes a bearing 53. The bearing 53 is sleeved on the load shaft 2. The water blocking plate 51 is fixedly connected to the outer ring of the bearing 53. The water blocking plate 51 is circular. The end face edge of the water blocking plate 51 facing the conductor rotor 12 protrudes and extends axially. The extending part of the water blocking plate 51 is its side wall. A plurality of openings are concave on the side wall. All the openings are evenly distributed on the side wall. The cross section of the water blocking plate 51 is in the shape of "C". There is a certain distance between the water blocking plate 51 and the side walls of the fixing plate 46 and the heat absorption chamber 44. A water absorbing sponge 52 is connected to the water blocking plate 51. The water absorbing sponge 52 is in contact with the permanent magnet rotor 21.

[0030] After the cooling water flows out from the water outlet 45, it is absorbed by the water-absorbing sponge 52, continuously dissipating heat from the permanent magnet rotor 21, and this process continues all the time. The water-absorbing sponge 52 continuously absorbs the cooling water flowing out from the water outlet 45, and the temperature will not keep rising. Since the water-absorbing sponge 52 cannot absorb all the cooling water, the excess cooling water will flow out through the openings on the side wall of the water-blocking plate 51 and the gaps between the heat-absorbing cavity 44 and the fixing plate 46, enter the heat dissipation cavity 3 and flow out from the drain hole 32 at the bottom.

[0031] Since the water-blocking plate 51 is fixedly connected to the outer ring of the bearing 53, at this time, the water-blocking plate 51 is connected to the load shaft 2 but still remains stationary and will not rotate with the load shaft 2. Therefore, no centrifugal force will be generated, causing the cooling water absorbed by the water-absorbing sponge 52 to concentrate on the outer edge, resulting in uneven heat dissipation and affecting the heat dissipation effect.

[0032] All the structures inside the heat dissipation cavity 3 of this device are waterproofed. Waterproof materials or waterproof coatings can be used. Each part of the heat dissipation component 4 and the continuous heat dissipation component 5 also needs to ensure concentricity, that is, the centers of each part of the structure are located on the same straight line, and this straight line is the center line of the motor shaft 11 and the load shaft 2.

[0033] The usage method of the sealing structure of a water-cooled permanent magnet speed regulator in this embodiment is as follows:

[0034] The external water supply device makes the cooling water enter the water storage bin 41 from the water inlet 42 through pressure, and then enters the heat-absorbing cavity 44 through the water guiding ring 43. The heat-absorbing cavity 44 is in contact with the conductor rotor 12, and heat is dissipated through heat transfer. At the same time, since the motor shaft 11 drives the conductor rotor 12 to rotate, affected by the centrifugal force, the movable plate 47 squeezes the pressure spring 49 and displaces towards the fixing plate 46 on the guiding column 48, and the water outlet 45 is exposed, and the cooling water flows out, contacts the surface of the conductor rotor 12, and directly dissipates heat. Moreover, the higher the rotational speed, the greater the centrifugal force, the larger the area of the exposed water outlet 45, the more cooling water flows out, the better the heat dissipation effect, reducing the waste of water resources and improving the heat dissipation efficiency. Since the external water supply pressure remains constant, the cooling water is sufficient and can keep running in this state all the time.

[0035] The flowing-out cooling water wets the water-absorbing sponge 52. The water-absorbing sponge 52 is in contact with the permanent magnet rotor 21 and continuously dissipates heat from it. And the cooling water keeps flowing out, exchanging with the cooling water inside the water-absorbing sponge 52, and the temperature will be kept within a certain range and will not keep rising. The excess cooling water leaks out through the openings on the side wall of the water-blocking plate 51 and the gaps between the fixing plate 46, and is discharged from the drain hole 32 of the heat dissipation cavity 3. After being cooled by external collection, it can be recycled.

[0036] The above embodiments are only used to illustrate the technical idea of the present utility model, and the protection scope of the present utility model cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present utility model falls within the protection scope of the present utility model.

Claims

1. A sealing structure of a water-cooled permanent magnet speed regulator, comprising a motor (1), a load end and a heat dissipation cavity (3), wherein a motor shaft (11) of the motor (1) is connected to a conductor rotor (12), and a load shaft (2) of the load end is connected to a permanent magnet rotor (21), characterized in that: The conductor rotor (12) is coupled to the permanent magnet rotor (21) and is located in the heat dissipation cavity (3). The heat dissipation cavity (3) is grounded. The heat dissipation component (4) is arranged on a side close to the motor shaft (11). The heat absorption cavity (44) of the heat dissipation component (4) is in contact with the conductor rotor (12). The heat dissipation component (4) comprises a water storage cavity (41). The water storage cavity (41) is sleeved on the motor shaft (11) and connected to the inner wall of the heat dissipation cavity (3). The water inlet (42) of the water storage cavity (41) passes through and extends out of the top of the heat dissipation cavity (3). One end of the water guide ring (43) is rotatably connected to the end surface of the water storage cavity (41), and the other end is connected to the heat absorption cavity (44). A plurality of water outlets (45) are arranged at the edge of the heat chamber (44), and the water outlets (45) are located outside the end surface of the conductor rotor (12). A fixed plate (46) is extended axially from the side wall of the heat absorption chamber (44), and the fixed plate (46) faces the permanent magnet rotor (21). A guide column (48) is arranged on the inner side of the fixed plate (46), and a movable plate (47) passes through the guide column (48). A pressure spring (49) is sleeved on the guide column (48) and is located between the fixed plate (46) and the movable plate (47). The continuous heat dissipation component (5) is connected to the load shaft (2) and is in contact with the permanent magnet rotor (21), and the continuous heat dissipation component (5) remains stationary.

2. The sealing structure of a water-cooled permanent magnet speed regulator according to claim 1 is characterized in that: A support (31) is provided at the bottom of the heat dissipation cavity (3), a drainage hole (32) is provided in the middle of the bottom of the heat dissipation cavity (3), and a sponge cushion layer (33) is provided above the drainage hole (32).

3. The sealing structure of a water-cooled permanent magnet speed regulator according to claim 1 is characterized in that: One side of the movable plate (47) is in contact with the end surface of the heat dissipation cavity (3) and blocks the water outlet (45).

4. The sealing structure of a water-cooled permanent magnet speed regulator according to claim 1 is characterized in that: The continuous heat dissipation component (5) comprises a bearing (53), the bearing (53) is sleeved on the load shaft (2), the water blocking plate (51) is connected to the outer ring of the bearing (53), and the water absorbing sponge (52) is arranged on the water blocking plate (51) and fits with the permanent magnet rotor (21).

5. The sealing structure of a water-cooled permanent magnet speed regulator according to claim 4 is characterized in that: The cross section of the water blocking plate (51) is in a "C" shape, and the side wall of the water blocking plate (51) is located outside the side wall of the heat absorption cavity (44).

6. The sealing structure of a water-cooled permanent magnet speed regulator according to claim 4 is characterized in that: The side wall of the water blocking plate (51) is evenly provided with openings for infiltrating cooling water.

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