An adjustable torque magnetic coupler

Abstract

The present invention provides an adjustable-torque magnetic coupler, which relates to the technical field of magnetic couplers and includes: an inner magnetic steel roller, which is arranged in a fixed-axis rotation manner, an outer magnetic steel, which is composed of a plurality of mutually separated outer magnetic plates arranged in an annular array along the axis of the inner magnetic steel roller; an air gap is formed between the inner magnetic plate and the outer magnetic plate, an air gap adjusting mechanism, and a temperature control adjusting mechanism, which adjusts the temperatures of the inner magnetic steel roller and the outer magnetic steel through the coordinated action of a cooling module and a heating module, and when a slip occurs between the inner magnetic steel roller and the outer magnetic steel, the inner magnetic plate is demagnetized by the increase in temperature. By adjusting the temperatures on the inner magnetic steel roller and the outer magnetic steel, the magnetic coupler of the present invention can be at the optimal working temperature, and also reduces the risk of overload damage to the external transmission mechanism caused by magnetic coupling when the slave rotor is stuck and braked through the ingenious application of demagnetization decoupling, ensuring the structural safety of the magnetic coupler.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic couplers, and particularly to an adjustable torque magnetic coupler. Background Art

[0002] In the prior art, there is a radial flux squirrel-cage rotor permanent magnet magnetic coupler with the publication number of "CN203933304U". This radial flux squirrel-cage rotor permanent magnet magnetic coupler consists of an inner driven rotor part and an outer active rotor part. There is an air gap between the driven rotor part and the active rotor part; a groove structure is arranged on the inner wall of the yoke of the active rotor, and a permanent magnet is embedded in the groove structure and fixedly connected to it; the yoke of the driven rotor is installed on the driven rotor shaft, and a number of uniformly distributed rotor bars are embedded in the outer wall of the yoke of the driven rotor; the rotor bars and the yoke of the driven rotor form a squirrel-cage rotor. The above device realizes the adjustment of the torque and speed on the mechanical load side by adjusting the coupling distance between the main and driven rotors, and is applicable to the energy-saving transformation of motor speed regulation for driving fluid-like loads.

[0003] However, there are still relatively obvious defects in the use of the above device: the above device only adjusts the magnetic coupling strength by adjusting the air gap distance between the main and driven rotors. This adjustment process is relatively single, and when the magnetic coupler is in a special working environment, for example, when the magnetic coupler is in a high-temperature environment, the high temperature will affect the magnetism of the main and driven rotors, thereby affecting the magnetic coupling strength between the two. When the temperature is too high, it may also cause the magnetic force of the main and driven magnet rotors to disappear, thereby affecting the normal operation of the device. Summary of the Invention

[0004] The purpose of the present invention is to provide an adjustable torque magnetic coupler to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An adjustable torque magnetic coupler, comprising:

[0007] An inner magnetic steel roller, which is set to rotate around a fixed axis, and a plurality of inner magnetic plates are annularly and arrayedly installed thereon;

[0008] An outer magnetic steel, which is composed of a plurality of mutually separated outer magnetic plates that are annularly and arrayedly arranged along the axis of the inner magnetic steel roller;

[0009] The inner magnetic plate and the outer magnetic plate are separated from each other to form an air gap. One side of the axis of the inner magnetic steel roller is fixedly installed with a power input shaft, and the outer magnetic steel is connected to a power output shaft. The power input shaft is connected to an external transmission mechanism to drive the inner magnetic steel roller to perform a fixed-axis rotational motion. The outer magnetic steel undergoes magnetic coupling during the rotation of the inner magnetic steel roller and performs non-contact torque transmission;

[0010] An air gap adjusting mechanism, which is used to synchronously adjust the air gap distance between multiple outer magnetic plates and the inner magnetic steel roller; and,

[0011] A temperature control adjusting mechanism, which includes a cooling module and a heating module. The cooling module and the heating module are arranged inside the inner magnetic steel roller and the outer magnetic steel. Through the coordinated action of the cooling module and the heating module, the temperature of the inner magnetic steel roller and the outer magnetic steel is adjusted to make it in a preset temperature working range. When a slip occurs between the inner magnetic steel roller and the outer magnetic steel, the inner magnetic plate is demagnetized by the increase in temperature, thereby reducing the magnetic coupling strength between the inner magnetic plate and the outer magnetic plate, and further reducing the risk of magnetic overload damage to the external transmission mechanism.

[0012] Preferably, the air gap adjusting mechanism for synchronously adjusting multiple outer magnetic plates includes upper limit plates and lower limit plates arranged on both sides of the inner magnetic steel roller. The upper limit plates and the lower limit plates are both provided with limit sliding grooves with the same number and one-to-one correspondence as the outer magnetic plates. A limit sliding rod is slidably arranged in the limit sliding groove in a translational manner, and the limit sliding rod is fixedly connected to the outer magnetic plate. The outer magnetic plate is driven to translate synchronously by the translational sliding of the limit sliding rod in the limit sliding groove.

[0013] Preferably, one side of the upper limit plate is also movably installed with a slotted gear through a bearing. The slotted gear is provided with adjustment holes with the same number and one-to-one correspondence as the outer magnetic plates. An adjustment vertical rod is slidably installed in the adjustment holes. The adjustment vertical rod is movably connected to the limit sliding rod through a rotating shaft. The rotation of the slotted gear drives the adjustment vertical rod to slide in the adjustment holes, thereby pushing the limit sliding rod to perform a synchronous telescopic motion. The limit sliding rod is also provided with bolt installation holes penetrating through at equal intervals. A limit bolt is installed in the bolt installation holes, and the limit bolt passes through the bolt installation holes and cooperates with the limit holes arranged at the bottom of the limit sliding groove to complete the fixation of the limit sliding rod.

[0014] Preferably, the inner magnetic steel roller includes a steel core cylinder, a partition plate, an inner magnetic plate, and an inner temperature control layer. The inner temperature control layer is arranged between the steel core cylinder and the inner magnetic plate.

[0015] Preferably, the temperature reduction module and the temperature increase module are arranged inside the internal temperature control layer. The internal temperature control layer includes a resistance wire arrangement area and a cooling water pipe arrangement area. The resistance wires in the resistance wire arrangement area are electrically connected to an external power supply module through a power input shaft. The cooling water pipes in the cooling water pipe arrangement area are communicated with an external water circulation module through a power input shaft.

[0016] Preferably, a cooling water pipe arrangement area is also arranged inside the outer magnetic plate. The cooling water pipes in the cooling water pipe arrangement area are communicated with an external water circulation module through a power output shaft.

[0017] Preferably, temperature sensors are installed on both the inner magnetic plate and the outer magnetic plate.

[0018] Preferably, water inlet holes and water outlet holes are formed on the sides of the power input shaft and the power output shaft. Water supply sealing sleeves are installed outside the water inlet holes and water outlet holes on the power input shaft and the power output shaft. Corresponding water inlet spaces and water outlet spaces are formed on the water supply sealing sleeves. The water inlet space and the water outlet space are communicated with an external water circulation module through an external water inlet pipe and an external water outlet pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] On the basis of the existing air gap adjustment, the present invention also introduces a temperature control adjustment mechanism. By adjusting the temperatures on the inner magnetic steel roller and the outer magnetic steel, the magnetic coupling can be in the optimal working temperature, which is especially suitable for the working requirements of the magnetic coupling in a high-temperature environment. At the same time, aiming at the short-term demagnetization phenomenon generated by the magnet in a specific temperature range, the present invention also uses this demagnetization phenomenon to decouple the inner magnetic steel roller and the outer magnetic steel under the condition of not changing the air gap distance. The ingenious application of this demagnetization decoupling can further reduce the risk of overload damage to the external transmission mechanism caused by magnetic coupling when the slave rotor is stuck and braked, greatly ensuring the structural safety of the magnetic coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic installation diagram of the air gap adjustment mechanism of the present invention;

[0022] Figure 2 is a schematic installation diagram of the temperature control adjustment mechanism of the present invention;

[0023] Figure 3 is a schematic side view of the overall structure of the present invention;

[0024] Figure 4 is a schematic top view of the overall structure of the present invention;

[0025] Figure 5 is a schematic bottom view of the overall structure of the present invention;

[0026] Figure 6 Schematic cross-sectional structure diagram of the inner magnetic steel roller of the present invention;

[0027] Figure 7 Schematic structure diagram of the outer magnetic plate of the present invention.

[0028] In the figure: 1 inner magnetic steel roller, 2 inner magnetic plate, 3 outer magnetic steel, 4 outer magnetic plate, 5 air gap, 6 power input shaft, 7 power output shaft, 8 upper limit plate, 9 lower limit plate, 10 limit chute, 11 limit slide bar, 12 slotted gear, 13 adjustment hole, 14 adjustment vertical rod, 16 bolt mounting hole, 17 limit bolt, 18 steel core cylinder, 19 partition plate, 20 internal temperature control layer, 21 resistance wire layout area, 22 cooling water pipe layout area, 23 external power supply module, 24 temperature sensor, 25 water inlet hole, 26 water outlet hole, 27 water supply seal sleeve, 28 water inlet space, 29 water outlet space, 30 external water inlet pipe, 31 external water outlet pipe. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figure 1-7 , the present invention provides a technical solution:

[0031] Embodiment 1:

[0032] An adjustable torque magnetic coupler, comprising:

[0033] An inner magnetic steel roller 1, which is arranged in a fixed-axis rotation manner, and a plurality of inner magnetic plates 2 are annularly and arrayedly installed thereon;

[0034] An outer magnetic steel 3, which is composed of a plurality of mutually separated outer magnetic plates 4 arranged in an annular array along the axis of the inner magnetic steel roller 1;

[0035] The inner magnetic plate 2 and the outer magnetic plate 4 are mutually separated to form an air gap 5. One side of the axis of the inner magnetic steel roller 1 is fixedly installed with a power input shaft 6, and the outer magnetic steel 3 is connected to the power output shaft 7. The power input shaft 6 drives the inner magnetic steel roller 1 to perform a fixed-axis rotational motion by connecting with an external transmission mechanism. The outer magnetic steel 3 undergoes magnetic coupling and performs non-contact torque transmission during the rotation of the inner magnetic steel roller 1;

[0036] An air gap adjusting mechanism, which is used to synchronously adjust the air gap distance between the plurality of outer magnetic plates 4 and the inner magnetic steel roller 1; and,

[0037] Temperature control and adjustment mechanism. The temperature control and adjustment mechanism includes a cooling module and a heating module. The cooling module and the heating module are arranged inside the inner magnetic steel roller 1 and the outer magnetic steel 3. Through the synergistic effect of the cooling module and the heating module, the temperatures of the inner magnetic steel roller 1 and the outer magnetic steel 3 are adjusted to make them within a preset temperature working range. When the inner magnetic steel roller 1 and the outer magnetic steel 3 experience a slipping step, the inner magnetic plate 2 is demagnetized due to the increase in temperature, thereby reducing the magnetic force coupling strength between the inner magnetic plate 2 and the outer magnetic plate 4, and further reducing the risk of magnetic overload damage to the external transmission mechanism.

[0038] In this embodiment, the inner magnetic steel roller 1 is fixedly connected to the power input shaft 6, and the outer magnetic steel 3 is fixedly connected to the power output shaft 7. The inner magnetic plate 2 and the outer magnetic plate 4 are separated from each other to form an air gap 5. The air gap distance between the multiple outer magnetic plates 4 and the inner magnetic steel roller 1 is adjusted through the air gap adjustment mechanism, thereby changing their magnetic force coupling strength. This adjustment is beneficial for forming torque limitation between the master and slave rotors, thus preventing the problem of damage to the main transmission mechanism due to excessive magnetic force torque coupling strength between the two. Further, in this embodiment, a temperature control and adjustment mechanism is further provided. The temperature control and adjustment mechanism includes a cooling module and a heating module. The cooling module and the heating module are arranged inside the inner magnetic steel roller 1 and the outer magnetic steel 3. Through the synergistic effect of the cooling module and the heating module, the temperatures of the inner magnetic steel roller 1 and the outer magnetic steel 3 are adjusted to make them within a preset temperature working range. This setting can effectively address the problem of weakening of magnetic force caused by excessive temperature of the magnetic coupler in a high-temperature environment. The inner magnetic steel roller 1 of the present invention and the power input shaft 6 use a neodymium iron boron composite material as the magnetic mechanism. When this material is heated to a certain temperature, a demagnetization phenomenon will occur. The Curie temperature of this material is approximately between 320°C and 380°C. When the temperature exceeds this temperature, the magnetism of the magnet disappears and cannot be restored. When its temperature reaches about 200°C, its remanence drops by nearly 20% compared to room temperature, and the maximum magnetic energy product drops by about 45%. Therefore, using this characteristic, the magnetic force coupling strength between the two can be adjusted only by heating the inner magnetic steel roller 1 and the outer magnetic steel 3 without changing the air gap distance. The advantage of doing this is that there is no need to set up a moving mechanism for air gap adjustment, and the reaction is faster. When the driven rotor is stuck and braked, if the driving rotor continues to rotate at a high speed, it will be affected by the magnetism of the driven rotor during rotation and generate overload. At this time, if the magnetic force coupling strength between the two can be reduced in time, it will protect the external transmission mechanism. After the external transmission mechanism stops moving, the inner magnetic steel roller 1 and the outer magnetic steel 3 are restored to normal temperature by cooling. At this time, the magnetism of the magnet is restored. This adjustment method without changing the air gap distance is more efficient. In addition, the cooling module provided therein can quickly cool the magnet after the external transmission mechanism stops rotating, thereby ensuring that the magnetism of the magnet does not undergo permanent demagnetization.

[0039] Embodiment Two:

[0040] The air gap adjusting mechanism for synchronously adjusting multiple outer magnetic plates 4 includes an upper limit plate 8 and a lower limit plate 9 arranged on both sides of the inner magnetic steel roller 1. The upper limit plate 8 and the lower limit plate 9 are both provided with limit sliding grooves 10 that are the same in number as and correspond one by one to the outer magnetic plates 4. A limit sliding rod 11 is slidably arranged in the limit sliding groove 10 in a translational manner, and the limit sliding rod 11 is fixedly connected to the outer magnetic plate 4. By the translational sliding of the limit sliding rod 11 in the limit sliding groove 10, the outer magnetic plate 4 is driven to translate synchronously.

[0041] On one side of the upper limit plate 8, a slotted gear 12 is also movably installed through a bearing. The slotted gear 12 is provided with adjustment holes 13 that are the same in number as and correspond one by one to the outer magnetic plates 4. An adjustment vertical rod 14 is slidably installed in the adjustment hole 13. The adjustment vertical rod 14 is movably connected to the limit sliding rod 11 through a rotating shaft. By the rotation of the slotted gear 12, the adjustment vertical rod 14 slides in the adjustment hole 13 to push the limit sliding rod 11 to perform a synchronous telescopic movement. The limit sliding rod 11 is also provided with bolt installation holes 16 that are arranged at equal intervals and penetrate through. A limit bolt 17 is installed in the bolt installation hole 16. The limit bolt 17 passes through the bolt installation hole 16 and cooperates with the limit hole arranged at the bottom of the limit sliding groove 10 to complete the fixation of the limit sliding rod.

[0042] In this embodiment, the specific structure of the air gap 5 adjusting mechanism between the outer magnetic plate 4 and the inner magnetic plate 2 is further disclosed. By inserting the limit bolt 17 into the bolt installation hole 16 opened on the limit sliding rod 11 and making the limit bolt 17 abut against the limit hole opened at the bottom of the limit sliding groove 10, the limit sliding rod 11 is completed to abut and be limited at this time. When the limit bolt 17 is removed, the slotted gear 12 is rotated. At this time, the adjustment vertical rod 14 slides in an arc in the adjustment hole 13, so that a plurality of limit sliding rods 11 are synchronously telescoped. After the adjustment is completed, the cooperation between the bolt installation hole 16 and the limit hole and the bolt installation hole 16 is used again to complete the re-fixation of the limit sliding rod 11.

[0043] Embodiment Three:

[0044] The inner magnetic steel roller 1 includes a steel core cylinder 18, a partition plate 19, an inner magnetic plate 2, and an internal temperature control layer 20. The internal temperature control layer 20 is arranged between the steel core cylinder 18 and the inner magnetic plate 2.

[0045] The cooling module and the heating module are arranged in the internal temperature control layer 20. The internal temperature control layer 20 includes a resistance wire arrangement area 21 and a cooling water pipe arrangement area 22. The resistance wires in the resistance wire arrangement area 21 are electrically connected to an external power supply module 23 through a power input shaft 6, and the cooling water pipes in the cooling water pipe arrangement area 22 are communicated with an external water circulation module through the power input shaft 6.

[0046] A cooling water pipe layout area 22 is also provided inside the outer magnetic plate 4. The cooling water pipes in the cooling water pipe layout area 22 are connected to an external water circulation module via the power output shaft 7.

[0047] Temperature sensors 24 are installed on both the inner magnetic plate 2 and the outer magnetic plate 4.

[0048] Water inlet holes 25 and water outlet holes 26 are provided on the sides of both the power input shaft 6 and the power output shaft 7. Water supply sealing sleeves 27 are installed outside the water inlet holes 25 and water outlet holes 26 on the power input shaft 6 and the power output shaft 7. Water inlet spaces 28 and water outlet spaces 29 are correspondingly provided on the water supply sealing sleeves 27. The water inlet spaces 28 and the water outlet spaces 29 are connected to an external water circulation module via an external water inlet pipe 30 and an external water outlet pipe 31.

[0049] In this embodiment, the specific structure of the temperature control and adjustment mechanism is further disclosed. Heating is performed by arranging resistance wires in the resistance wire layout area 21, cooling is completed by arranging cooling water pipes in the cooling water pipe layout area 22, temperature sensors 24 are installed on both the inner magnetic plate 2 and the outer magnetic plate 4 for temperature monitoring, and the heating power and the cooling water circulation rate are adjusted according to the temperature data monitored by the temperature sensors 24, so as to control the inner magnetic plate 2 and the outer magnetic plate 4 within a reasonable range.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable torque magnetic coupler, characterized in that, Comprising: An inner magnetic steel roller, which is arranged in a fixed-axis rotation manner, and a plurality of inner magnetic plates are annularly arrayed thereon; An outer magnetic steel, which is composed of a plurality of mutually separated outer magnetic plates that are annularly arrayed along the axis of the inner magnetic steel roller; An air gap is formed between the inner magnetic plate and the outer magnetic plate. A power input shaft is fixedly installed on one side of the axis of the inner magnetic steel roller. The outer magnetic steel is connected to a power output shaft. The power input shaft drives the inner magnetic steel roller to perform a fixed-axis rotation movement by connecting with an external transmission mechanism. The outer magnetic steel undergoes magnetic coupling during the rotation of the inner magnetic steel roller and performs non-contact torque transmission; An air gap adjustment mechanism, which is used to synchronously adjust the air gap distance between the plurality of outer magnetic plates and the inner magnetic steel roller; and, A temperature control adjustment mechanism, which includes a cooling module and a heating module. The cooling module and the heating module are arranged inside the inner magnetic steel roller and the outer magnetic steel. The temperature of the inner magnetic steel roller and the outer magnetic steel is adjusted through the cooperative action of the cooling module and the heating module to make it in a preset temperature working range. When a slip occurs between the inner magnetic steel roller and the outer magnetic steel, the inner magnetic plate is demagnetized by the increase in temperature, thereby reducing the magnetic coupling strength between the inner magnetic plate and the outer magnetic plate, and further reducing the risk of magnetic overload damage to the external transmission mechanism.

2. The adjustable torque magnetic coupler according to claim 1, wherein: The air gap adjustment mechanism for synchronously adjusting the plurality of outer magnetic plates includes upper limit plates and lower limit plates arranged on both sides of the inner magnetic steel roller. The upper limit plates and the lower limit plates are both provided with limit sliding grooves that are the same in number and in one-to-one correspondence with the outer magnetic plates. Limit sliding rods are translationally slidably arranged in the limit sliding grooves. The limit sliding rods are fixedly connected to the outer magnetic plates, and the outer magnetic plates are synchronously translated by the translational sliding of the limit sliding rods in the limit sliding grooves.

3. An adjustable torque magnetic coupler according to claim 2, characterized in that: One side of the upper limit plate is also movably installed with a slotted gear through a bearing. The slotted gear is provided with adjustment holes that are the same in number and in one-to-one correspondence with the outer magnetic plates. Adjustment vertical rods are slidably installed in the adjustment holes. The adjustment vertical rods are movably connected to the limit sliding rods through rotating shafts. The rotation of the slotted gear drives the adjustment vertical rods to slide in the adjustment holes, thereby pushing the limit sliding rods to perform synchronous telescopic movements. The limit sliding rods are also provided with bolt installation holes that penetrate through at equal intervals. Limit bolts are installed in the bolt installation holes. The limit bolts pass through the bolt installation holes and cooperate with the limit holes arranged at the bottom of the limit sliding grooves to complete the fixation of the limit sliding rods.

4. An adjustable torque magnetic coupler according to claim 1 or 3, characterized in that: The inner magnetic steel roller includes a steel core cylinder, a partition plate, an inner magnetic plate, and an inner temperature control layer. The inner temperature control layer is arranged between the steel core cylinder and the inner magnetic plate.

5. An adjustable torque magnetic coupler according to claim 4, characterized in that: The cooling module and the heating module are arranged inside the inner temperature control layer. The inner temperature control layer includes a resistance wire arrangement area and a cooling water pipe arrangement area. The resistance wires in the resistance wire arrangement area are electrically connected to an external power supply module through the power input shaft. The cooling water pipes in the cooling water pipe arrangement area are communicated with an external water circulation module through the power input shaft.

6. The adjustable torque magnetic coupler according to claim 5, wherein: A cooling water pipe arrangement area is also arranged inside the outer magnetic plate. The cooling water pipes in the cooling water pipe arrangement area are communicated with an external water circulation module through the power output shaft.

7. An adjustable torque magnetic coupler according to claim 6, characterized in that: Temperature sensors are installed on both the inner magnetic plate and the outer magnetic plate.

8. An adjustable torque magnetic coupler according to claim 7, characterized in that: Water inlet holes and water outlet holes are provided on the sides of the power input shaft and the power output shaft. A water supply sealing sleeve is installed outside the water inlet holes and water outlet holes on the power input shaft and the power output shaft. A water inlet space and a water outlet space are correspondingly provided on the water supply sealing sleeve. The water inlet space and the water outlet space are communicated with an external water circulation module through an external water inlet pipe and an external water outlet pipe.

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