Torque-adjustable magnetic coupler

Abstract

The invention provides a torque-adjustable magnetic coupler, which relates to the technical field of magnetic couplers and comprises an inner magnetic steel roller and outer magnetic steel, the inner magnetic steel roller is arranged in a fixed-axis rotating mode, and the outer magnetic steel is composed of a plurality of outer magnetic plates which are separated from one another and are arranged in an annular array mode along the axis of the inner magnetic steel roller; the inner magnetic plate and the outer magnetic plate are separated from each other to form an air gap, the air gap adjusting mechanism and the temperature control adjusting mechanism are used for adjusting the temperature of the inner magnetic steel roller and the temperature of the outer magnetic steel through the synergistic effect of the cooling module and the heating module, and when the inner magnetic steel roller and the outer magnetic steel slide, the inner magnetic plate is demagnetized through temperature rise, so that the inner magnetic steel roller and the outer magnetic steel are demagnetized. According to the invention, the temperature of the inner magnetic steel roller and the temperature of the outer magnetic steel roller are adjusted, so that the magnetic coupler can be at the optimal working temperature, and the risk of overload damage of an external transmission mechanism caused by magnetic coupling is reduced through ingenious application of demagnetization and decoupling when the slave rotor is clamped and braked. And the structural safety of the magnetic coupler is ensured.

Description

Technical Field

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

[0002] A radial flux squirrel cage rotor permanent magnet magnetic coupler with a publication number of "CN203933304U" in the prior art. The radial flux squirrel cage rotor permanent magnet magnetic coupler consists of an internal driven rotor part and an outer active rotor part, with an air gap between the driven rotor part and the active rotor part; a slot structure is provided on the inner wall of the active rotor yoke, and a permanent magnet is embedded in the slot structure, and the two are fixedly connected; the driven rotor yoke is installed on the driven rotor shaft, and a number of evenly distributed rotor bars are embedded in the outer wall of the driven rotor yoke; the rotor bars and the driven rotor yoke constitute a squirrel cage rotor, and the above device realizes torque and speed regulation on the mechanical load side by adjusting the coupling distance between the master and slave rotors, and is suitable for speed regulation and energy-saving transformation of motors driving fluid loads.

[0003] However, the above-mentioned device still has obvious defects during use: the above-mentioned device only adjusts the magnetic coupling strength by adjusting the air gap distance between the master and slave rotors. This adjustment process is relatively simple, 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 master and slave rotors, thereby affecting the magnetic coupling strength between the two. When the temperature is too high, it may also cause the magnetism of the master and slave magnetic steel rotors to disappear, thereby affecting the normal operation of the device. Summary of the invention

[0004] The object of the present invention is to provide an adjustable torque magnetic coupling to solve the problems raised in the above background technology.

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

[0006] An adjustable torque magnetic coupler, comprising:

[0007] An inner magnetic steel roller, wherein the inner magnetic steel roller is arranged to rotate on a fixed axis, and a plurality of inner magnetic plates are installed in a circular array on the inner magnetic steel roller;

[0008] The outer magnetic steel is composed of a plurality of outer magnetic plates separated from each other and arranged in a ring array 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, 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 the power output shaft, the power input shaft is connected to the external transmission mechanism to drive the inner magnetic steel roller to perform fixed-axis rotation, and the outer magnetic steel is magnetically coupled during the rotation of the inner magnetic steel roller and performs non-contact torque transmission;

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

[0011] A temperature control and adjustment mechanism, wherein the temperature control and adjustment mechanism comprises a cooling module and a heating module, wherein the cooling module and the heating module are arranged in the inner magnetic steel roller and the outer magnetic steel, and the temperature of the inner magnetic steel roller and the outer magnetic steel is adjusted by the synergistic action of the cooling module and the heating module to keep them in a preset temperature working range, and when the inner magnetic steel roller and the outer magnetic steel slip, 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, thereby reducing the risk of magnetic overload damage to the external transmission mechanism.

[0012] Preferably, the air gap adjustment mechanism for synchronously adjusting multiple external magnetic plates includes an upper limit plate and a lower limit plate arranged on both sides of the inner magnetic steel roller, and the upper limit plate and the lower limit plate are each provided with a limit slide groove whose number is the same as that of the external magnetic plates and corresponds one to one, and a limit slide rod is arranged in the limit slide groove for translational sliding, and the limit slide rod is fixedly connected to the external magnetic plates, and the limit slide rod drives the external magnetic plates to translate synchronously by translationally sliding in the limit slide groove.

[0013] Preferably, a slotted gear is movably installed on one side of the upper limit plate through a bearing, and the slotted gear is provided with adjustment holes in the same number as the outer magnetic plate and corresponding to each other. An adjustment vertical rod is slidably installed in the adjustment hole, and the adjustment vertical rod is movably connected with the limit slide bar through a rotating shaft. The rotation of the slotted gear drives the adjustment vertical rod to slide in the adjustment hole, thereby pushing the limit slide bar to perform synchronous telescopic movement. The limit slide bar is also provided with bolt mounting holes arranged through the rod at equal intervals, and a limit bolt is installed in the bolt mounting hole. The limit bolt passes through the bolt mounting hole and cooperates with the limit hole arranged at the bottom of the limit slide groove to complete the fixation of the limit slide bar.

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

[0015] Preferably, the cooling module and the heating module are arranged in an internal temperature control layer, and the internal temperature control layer includes a resistance wire arrangement area and a cooling water pipeline arrangement area. The resistance wire in the resistance wire arrangement area is electrically connected to the external power supply module via the power input shaft, and the cooling water pipe in the cooling water pipeline arrangement area is connected to the external water circulation module via the power input shaft.

[0016] Preferably, a cooling water pipeline arrangement area is also provided in the outer magnetic plate, and the cooling water pipes in the cooling water pipeline arrangement area are connected to the external water circulation module via the 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 provided on the sides of the power input shaft and the power output shaft, and 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. Water inlet spaces and water outlet spaces are correspondingly provided on the water supply sealing sleeves, and the water inlet spaces and water outlet spaces are connected to the external water circulation module through an external water inlet pipe and an external water outlet pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] On the basis of the existing air gap adjustment, the present invention also introduces a temperature control mechanism. By adjusting the temperature of the inner magnetic steel roller and the outer magnetic steel, the magnetic coupler can be kept at the optimal working temperature. It is particularly suitable for the high-temperature environment working requirements of the coupler. At the same time, in response to the short-term demagnetization phenomenon of the magnet in a specific temperature range, the present invention also uses the demagnetization phenomenon to decouple the inner magnetic steel roller and the outer magnetic steel without changing the air gap spacing. The clever use of this demagnetization and decoupling can further reduce the risk of overload damage to the external transmission mechanism caused by magnetic coupling when the rotor is locked and braked, thereby greatly ensuring the structural safety of the magnetic coupler. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0026] Figure 6 This is a schematic diagram of the cross-sectional structure of the inner magnetic steel roller of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure 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 slide, 11 limit slide bar, 12 slotted gear, 13 adjustment hole, 14 adjustment pole, 16 bolt mounting hole, 17 limit bolt, 18 steel core barrel, 19 partition plate, 20 inner temperature control layer, 21 resistance wire arrangement area, 22 cooling water pipeline arrangement area, 23 external power supply module, 24 temperature sensor, 25 water inlet hole, 26 water outlet hole, 27 water supply sealing sleeve, 28 water inlet space, 29 water outlet space, 30 external water inlet pipe, 31 external water outlet pipe. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also 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 is arranged to rotate on a fixed axis, and a plurality of inner magnetic plates 2 are arranged in a circular array on the inner magnetic steel roller 1;

[0034] The outer magnetic steel 3 is composed of a plurality of outer magnetic plates 4 separated from each other and arranged in a ring array along the axis of the inner magnetic steel roller 1;

[0035] The inner magnetic plate 2 and the outer magnetic plate 4 are separated from each other to form an air gap 5. A power input shaft 6 is fixedly installed on one side of the axis of the inner magnetic steel roller 1. The outer magnetic steel 3 is connected to the power output shaft 7. The power input shaft 6 is connected to the external transmission mechanism to drive the inner magnetic steel roller 1 to perform fixed-axis rotation. The outer magnetic steel 3 is magnetically coupled during the rotation of the inner magnetic steel roller 1 and performs non-contact torque transmission.

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

[0037] The temperature control and regulation mechanism includes a cooling module and a heating module, and the cooling module and the heating module are arranged in the inner magnetic steel roller 1 and the outer magnetic steel 3. The temperature of the inner magnetic steel roller 1 and the outer magnetic steel 3 are adjusted by the coordinated action of the cooling module and the heating module to make them in a preset temperature working range, and when the inner magnetic steel roller 1 and the outer magnetic steel 3 slip, the inner magnetic plate 2 is demagnetized by the increase in temperature, thereby reducing the magnetic coupling strength between the inner magnetic plate 2 and the outer magnetic plate 4, thereby 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, 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, and the air gap spacing between the multiple outer magnetic plates 4 and the inner magnetic steel roller 1 is adjusted by the air gap adjustment mechanism, thereby changing the magnetic coupling strength between the two. This adjustment is conducive to forming a torque limit between the master and slave rotors, thereby preventing the main transmission mechanism from being damaged due to excessive magnetic torque coupling strength between the two. Furthermore, a temperature control adjustment mechanism is further provided in this embodiment. The temperature control adjustment The mechanism includes a cooling module and a heating module, and the cooling module and the heating module are arranged in the inner magnetic steel roller 1 and the outer magnetic steel 3. The temperature of the inner magnetic steel roller 1 and the outer magnetic steel 3 is adjusted by the synergistic effect of the cooling module and the heating module to make them in a preset temperature working range. This setting can effectively deal with the problem of weakening of the magnetic force of the magnetic coupler due to excessive temperature in a high temperature environment. The inner magnetic steel roller 1 and the power input shaft 6 of the present invention use a neodymium iron boron composite material as a magnetic mechanism. When the material is heated to a certain temperature, demagnetization will occur. The Curie The temperature is about 320℃-380℃. When the temperature exceeds this temperature, the magnetism of the magnet disappears and cannot be restored. When its temperature reaches about 200℃, its remanence will drop by nearly 20% compared with room temperature, and the maximum magnetic energy product will drop by about 45%. Therefore, by utilizing this characteristic, the magnetic coupling strength between the inner magnetic steel roller 1 and the outer magnetic steel 3 can be adjusted without changing the air gap spacing by simply heating the inner magnetic steel roller 1 and the outer magnetic steel 3. The advantage of this is that there is no need to set a moving mechanism for air gap adjustment, and the reaction is faster. When the driven rotor is locked and braked, it prompts the active rotor to The driven rotor continues to rotate at a high speed, and during the rotation process, it will be affected by the magnetism of the driven rotor and overloaded. At this time, if the magnetic coupling strength between the two can be reduced in time, the external transmission mechanism will be protected. 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 that does not change the air gap spacing 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 is not permanently demagnetized.

[0039] Embodiment 2:

[0040] The air gap adjustment mechanism for synchronously adjusting multiple external magnetic plates 4 includes an upper limit plate 8 and a lower limit plate 9 arranged on both sides of the internal magnetic steel roller 1, and the upper limit plate 8 and the lower limit plate 9 are provided with limit slide grooves 10 whose number is the same as that of the external magnetic plates 4 and which correspond one to one. A limit slide bar 11 is arranged in the limit slide groove 10 for translational sliding. The limit slide bar 11 is fixedly connected to the external magnetic plate 4, and the external magnetic plate 4 is synchronously translated by the translational sliding of the limit slide bar 11 in the limit slide groove 10.

[0041] A slotted gear 12 is also movably installed on one side of the upper limit plate 8 through a bearing. The slotted gear 12 is provided with adjustment holes 13 whose number is the same as and one-to-one with the outer magnetic plate 4. An adjustment vertical rod 14 is slidably installed in the adjustment hole 13. The adjustment vertical rod 14 is movably connected with the limit slide bar 11 through a rotating shaft. The rotation of the slotted gear 12 drives the adjustment vertical rod 14 to slide in the adjustment hole 13, thereby pushing the limit slide bar 11 to perform synchronous telescopic movement. The limit slide bar 11 is also provided with bolt mounting holes 16 set through at equal intervals. Limiting bolts 17 are installed in the bolt mounting holes 16. The limiting bolts 17 pass through the bolt mounting holes 16 and cooperate with the limiting holes set at the bottom of the limiting slide groove 10 to complete the fixation of the limit slide bar.

[0042] In this embodiment, the specific structure of the air gap 5 adjustment 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 mounting hole 16 opened in the limit slide bar 11, and making the limit bolt 17 abut against the limit hole opened at the bottom of the limit slide groove 10, the limit slide bar 11 completes the abutment and limitation. 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 several limit slide bars 11 are synchronously extended and retracted. After the adjustment is completed, the limit slide bar 11 can be re-fixed by cooperating with the bolt mounting hole 16, the limit hole and the bolt mounting hole 16 again.

[0043] Embodiment three:

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

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

[0046] A cooling water pipeline arrangement area 22 is also provided in the outer magnetic plate 4 , and the cooling water pipes in the cooling water pipeline arrangement area 22 are connected to the external water circulation module via the power output shaft 7 .

[0047] Temperature sensors 24 are mounted 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 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 the 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 the external water circulation module through 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 arrangement area 21, and cooling water pipes are arranged in the cooling water pipe arrangement area 22 to achieve cooling. Temperature sensors 24 are installed on the inner magnetic plate 2 and the outer magnetic plate 4 to monitor the temperature, and the heating power and the cooling water circulation rate are adjusted according to the temperature data monitored by the temperature sensor 24, so as to control the inner magnetic plate 2 and the outer magnetic plate 4 within a reasonable range.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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: include: An inner magnetic steel roller, wherein the inner magnetic steel roller is arranged to rotate on a fixed axis, and a plurality of inner magnetic plates are installed in a circular array on the inner magnetic steel roller; The outer magnetic steel is composed of a plurality of outer magnetic plates separated from each other and arranged in a ring array along the axis of the inner magnetic steel roller; The inner magnetic plate and the outer magnetic plate are separated from each other to form an air gap, 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 the power output shaft, the power input shaft is connected to the external transmission mechanism to drive the inner magnetic steel roller to perform fixed-axis rotation, and the outer magnetic steel is magnetically coupled during the rotation of the inner magnetic steel roller and performs non-contact torque transmission; An air gap adjustment mechanism, the air gap adjustment mechanism is used to synchronously adjust the air gap spacing between the multiple outer magnetic plates and the inner magnetic steel roller; and A temperature control and adjustment mechanism, wherein the temperature control and adjustment mechanism comprises a cooling module and a heating module, wherein the cooling module and the heating module are arranged in the inner magnetic steel roller and the outer magnetic steel, and the temperature of the inner magnetic steel roller and the outer magnetic steel is adjusted by the synergistic action of the cooling module and the heating module to keep them in a preset temperature working range, and when the inner magnetic steel roller and the outer magnetic steel slip, 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, thereby reducing the risk of magnetic overload damage to the external transmission mechanism.

2. The adjustable torque magnetic coupler according to claim 1, characterized in that: The air gap adjustment mechanism for synchronously adjusting multiple external magnetic plates includes an upper limit plate and a lower limit plate arranged on both sides of the inner magnetic steel roller, and the upper limit plate and the lower limit plate are each provided with a limit slide groove whose number is the same as that of the external magnetic plates and corresponds one to one, and a limit slide rod is arranged in the limit slide groove for translational sliding, and the limit slide rod is fixedly connected to the external magnetic plates, and the limit slide rod translates in the limit slide groove to drive the external magnetic plates to translate synchronously.

3. The adjustable torque magnetic coupler according to claim 2, characterized in that: A slotted gear is movably installed on one side of the upper limit plate through a bearing, and the slotted gear is provided with adjustment holes of the same number as that of the outer magnetic plate and corresponding to each other. An adjustment vertical rod is slidably installed in the adjustment hole, and the adjustment vertical rod is movably connected with the limit slide bar through a rotating shaft. The rotation of the slotted gear drives the adjustment vertical rod to slide in the adjustment hole, thereby pushing the limit slide bar to perform telescopic movement synchronously. The limit slide bar is also provided with bolt mounting holes arranged through the same intervals, and a limit bolt is installed in the bolt mounting hole. The limit bolt passes through the bolt mounting hole and cooperates with the limit hole arranged at the bottom of the limit slide groove to complete the fixation of the limit slide bar.

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

5. The adjustable torque magnetic coupler according to claim 4, characterized in that: The cooling module and the heating module are arranged in an internal temperature control layer, and the internal temperature control layer includes a resistance wire arrangement area and a cooling water pipeline arrangement area. The resistance wire in the resistance wire arrangement area is electrically connected to the external power supply module via the power input shaft, and the cooling water pipe in the cooling water pipeline arrangement area is connected to the external water circulation module via the power input shaft.

6. The adjustable torque magnetic coupler according to claim 5, characterized in that: A cooling water pipeline arrangement area is also provided in the outer magnetic plate, and the cooling water pipes in the cooling water pipeline arrangement area are connected to the external water circulation module via the power output shaft.

7. The 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. The adjustable torque magnetic coupler according to claim 7, characterized in that: The power input shaft and the power output shaft are both provided with water inlet holes and water outlet holes on the sides, and 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. The water supply sealing sleeves are correspondingly provided with water inlet spaces and water outlet spaces, and the water inlet spaces and water outlet spaces are connected to the external water circulation module through an external water inlet pipe and an external water outlet pipe.

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