Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
  • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
  • H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
  • H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D13/00—Pumping installations or systems
  • F04D13/02—Units comprising pumps and their driving means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D13/00—Pumping installations or systems
  • F04D13/02—Units comprising pumps and their driving means
  • F04D13/021—Units comprising pumps and their driving means containing a coupling
  • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
  • F04D13/027—Details of the magnetic circuit
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
  • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
  • F16D3/04—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow radial displacement, e.g. Oldham couplings
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
  • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
  • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
  • H02K2213/09—Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
  • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
  • H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
  • H02K49/108—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with an axial air gap

Definitions

• the invention relates to a magnetic coupling arrangement for connecting a drive shaft of a drive with a drive shaft of a work machine and a device with such a magnetic coupling arrangement.
• a hub is provided, the moments transmitting on a first shaft, for example, the drive shaft, the output shaft or a propeller shaft between the drive and the machine can be fixed.
• the hub has a cavity in which a first set of magnets, preferably circumferentially on the inside of the cavity and in the circumferential direction at regular intervals to each other, is arranged.
• a propeller shaft head is disposed in the cavity of the hub.
• a second set of magnets is circumferentially disposed on the propeller shaft head, the propeller shaft head and hub transmitting moments transmitting with one of the shafts, e.g. the drive shaft, output shaft or the propeller shaft is coupled.
• the coupling of drive with working machine can be done directly by directly setting the propeller shaft head on one of the two drive or output shafts or a separate shaft, a propeller shaft.
• the hub torque transmitting moments on the output shaft of the drive can be fixed while the propeller shaft torque transmitting moments is coupled to the drive shaft of the machine, but in principle, a reverse assignment of hub and propeller shaft to the shafts of the drive and the machine is possible, intended and realized ,
• the arrangement of the hub or hubs on a propeller shaft and the design of the drive and output shafts with propeller shaft heads is possible, intended and realized.
• Cardan shafts are disadvantageous in terms of electrical separation of the machine from the drive machine, just as it is not possible via cardan shafts a limitation of to achieve transmitting torque. Furthermore, there are difficulties if one of the two housings of the machines requires a subsequent sealing, for example for explosion protection reasons.
• the object of the present invention is to provide a magnetic clutch assembly for connecting a work machine to a prime mover, which has an increased tolerance to misalignments and torque peaks of the drive shaft and output shaft. According to the invention this object is achieved by a magnetic coupling arrangement with the features of the main claim. Advantageous embodiments and further developments of the invention are disclosed in the subclaims, the description and the figure.
• the magnetic coupling assembly for connecting an output shaft of a drive with a drive shaft of a work machine with a hub having a cavity, wherein in the hub, a first set of magnets is arranged and arranged with a propeller shaft head in the cavity of the hub, wherein the propeller shaft head circumferentially a second set of magnets is arranged, provides that the propeller shaft head and the hub are transmitting moments coupled with either the drive shaft or the output shaft, wherein the propeller shaft head is tilted by an angle ⁇ arranged in the cavity of the hub, so that an asymmetric gap between the hub and the propeller shaft head is formed.
• the invention can be advantageously used in particular in one embodiment of a working machine as a pump and a drive as a motor, in particular as an electric motor.
• an automatic Overload protection provided, which works reliably after reducing the drive torque below the overload level, without any maintenance or repair would be necessary.
• a Verkippungs- angle ⁇ is provided , which makes it possible to compensate for assembly inaccuracies and manufacturing tolerances. Due to the non-contact transmission of the magnetic coupling wear-free torque transmission is realized, which also has no mechanical speed limit due to the bearing of the waves, in particular a separate propeller shaft. A transverse force in the respective shaft journals is minimized and vibrations from the output are not transmitted or only attenuated to the working machine. The torque transmission is bumpless and vibration-free, which reduces the wear of the machine and the drive. Due to the lack of mechanical friction in the torque transmission reduces the noise of the overall device of drive, work machine and magnetic joint assembly.
• the hub can be set or formed moments transmitting on the output and / or drive shaft or a propeller shaft. If a direct connection between the output shaft and the drive shaft is made via the magnetic coupling arrangement, the hub is arranged or formed on one shaft and the drive shaft shaft on the other shaft. In an intermediate propeller shaft, this may have two propeller shaft heads, two hubs or a hub and a propeller shaft head, the other two shafts are provided with corresponding propeller shaft heads or hubs.
• An embodiment of the invention provides that a first propeller shaft head is arranged at a first end of a propeller shaft, that at a second end of the propeller shaft, a second propeller shaft head is arranged and that both propeller shaft heads are each arranged in a cavity of two hubs, which are fixed transmitting moments with the output shaft and the drive shaft, wherein the propeller shaft heads and the hubs are formed corresponding to each other.
• propeller shaft with two propeller shaft heads at their ends it is also possible to arrange at the ends of the propeller shaft hubs or cup-shaped receptacles with cavities for the magnets, which are arranged in the hubs or cavities and the ends of the drive shaft and output shaft with propeller shaft heads to provide, on the outside of the magnets are arranged, so provide a geometric reversal of the arrangement of shaft head and hub. It is also possible that on one side of the propeller shaft, a propeller shaft head and at the other end a hub is arranged, wherein at the respectively associated ends of the output shafts and drive shafts a corresponding configuration with a hub and a propeller shaft head is provided.
• the propeller shaft is formed either by the drive shaft or by the output shaft, so that only a pair of hub and shaft head forms the magnetic joint assembly.
• a split pot can be arranged, via which it is possible to form a leak-free seal between the working machine and the drive machine. It can also be provided two split pots, which can be arranged on the working machine, the drive or on the propeller shaft. About the containment shell a static seal of the structure is possible, which is particularly advantageous for hermetically sealed machines is. Likewise, explosive media or highly aggressive media can be processed in the work machine, for example, pumped, without a current or material passage into the machine and the medium to be pumped with electrical components or with thelusterat atmosphere comes into contact.
• the shaft head in particular the propeller shaft head, is mounted in a development of the invention in the containment shell, for example via a roller bearing or in a sliding bearing, wherein the roller bearing compensates for the angular offset and is preferably designed as a roller bearing or spherical roller bearings.
• the roller bearing compensates for the angular offset and is preferably designed as a roller bearing or spherical roller bearings.
• a development of the invention provides that the outer contour of the waves head, so the drive or driven shaft head or the propeller shaft head and the inner contour of the cavity, which receives the shaft head with the magnets are cylindrical, resulting in a production of both the shaft heads and the cavities facilitated.
• the outer diameter of the shaft head is smaller than the inner diameter of the hub.
• the diameter difference and thus the maximum gap width is essentially dependent on the offset angle and the insertion depth of the shaft head into the hub and is preferably selected so that a minimal gap is formed.
• the dimensioning is based on the intended conditions of use, installation situation and design parameters.
• the axis of rotation of the respective propeller shaft head is preferably oriented at an angle between 0.5 ° and 5 °, in particular between 0.5 ° and 1, 5 ° to the axis of rotation of the drive shaft and / or the output shaft.
• a variant of the invention provides that the outer contour of the wave head convex and the inner contour of the cavity are cylindrical or concave.
• the hub can be positively fixed on the respective shaft, for example via a polygonal profile or a feather key, whereby it is possible to arrange different hubs on the respective shafts and to adapt the hubs to the respective shaft heads.
• the drive shaft and the output shaft are offset from each other, but advantageously parallel to the axis, so that only a single misalignment of the axes of the respective shafts occurs to each other and must be compensated through the gap between the hub and the respective shaft head.
• a development of the invention provides that the working machine and the drive are aligned with each other, advantageously, the housing of the machine and the housing of the drive is aligned with each other.
• Screw pump or eccentric screw designed which are particularly suitable for the promotion of food, high-viscosity media, hydrocarbons and aggressive media.
• the offset angle between the drive shaft and the output shaft is between 0.5 ° and 5 °, preferably between 0.5 ° and 1, 5 °, whereby on the one hand a sufficient mo- On the other hand, a sufficient error tolerance with respect to the offset of the axes of the shafts to each other can be achieved.
• the drive and the working machine can be flanged together, wherein the magnetic coupling arrangement can be arranged in a separate housing which is flanged between the drive and the working machine.
• the magnetic clutch assembly is arranged in one of the housing of the drive or the working machine.
• the drive and work machine device can also be designed as a downhole delivery unit and serve to convey hydrocarbons.
• Figure 1 is a schematic sectional view of the coupling of an output shaft of a drive and a drive shaft of a work machine via a propeller shaft.
• FIG. 2 is a sectional view of a direct connection of an output shaft with a cardan shaft head and a split pot.
• FIG. 3 shows a variant of FIG. 2 without a containment shell
• Fig. 4 shows a variant of Figure 2 with a direct connection of the propeller shaft head to a drive shaft.
• the drive 1 0 has an output shaft. 1 on which is positively connected via a key 10 with a first hub 1 1 moments transferring.
• a key 6 another positive coupling between the output shaft 1 and the hub 6 may be formed, for example via a Polygonalveriereung or another form-fitting coupling.
• the hub 1 1 has a cavity 12, which is cup-shaped and has on its inner circumference a magnet set 13, which is formed in the circumferential direction with an alternating polarity.
• a propeller shaft head 14 is arranged, which has a substantially cylindrical outer contour, which corresponds to the inner contour of the cavity 12 of the hub 1 1.
• a gap 50 is formed on the outer periphery of the propeller shaft head 14 .
• a second set of magnets On the outer periphery of the propeller shaft head 14 is a second set of magnets
• the hub 1 1 has within the cavity 12 a sleeve 1 1 1, which is integrally formed with the hub 1 1.
• the sleeve 1 1 1 may alternatively be formed as a separate component.
• the sleeve 1 1 1 serves to receive a guide bearing 4 in the form of a roller bearing, for example as a spherical roller bearing or Toroidalrollenlagers.
• the propeller shaft head 14 is rotatably supported by means of a guide pin 141, via the mechanical bearing point of the guide bearing 4 there is no torque transmission.
• the torque which is transmitted from the output shaft 1 to the propeller shaft head 14 is transmitted via a propeller shaft 16.
• the propeller shaft 16 transmits the torque to a second propeller shaft head 24 which is disposed at the opposite end of the propeller shaft 16 to the first propeller shaft head 14.
• a set of external magnets 25 is arranged in alternating polarity.
• a central pin 241 of the second propeller shaft head 24 is mounted in a second guide bearing 35 instead of a hub sleeve in a sleeve 31 of a split pot 3, which is attached either to a second hub 21 or separately to a housing. Through the split pot 3 a complete, hermetic separation between the drive 10 and the machine 20 is achieved.
• the second propeller shaft head 24 is rotatably supported within the containment shell 3, the containment shell 3 can also be fixed stationary.
• the containment shell 3 has an inner cavity 32, in which the second propeller shaft head 24 revolves and has a substantially cylindrical, cup-shaped inner and outer contour.
• the containment shell 3 is arranged in a cavity 22 of the second hub 21, on the inner circumference of the cavity 22, a second magnet set 23 is arranged, which also has an alternating polarity, so that the torque of the propeller shaft 16 via the outer magnets 25 and the inner magnets 23 on the hub 21 can be transmitted.
• the hub 21 is positively fixed on a drive shaft 2 of the machine 20 via a feather key 6, analogous to the attachment of the output shaft 1, another positive coupling between the hub 21 and the drive shaft 2 is provided.
• the output shaft 1 of the drive 10 is arranged offset to the drive shaft 2 of the working machine 20, so that there is a misalignment of the propeller shaft 16 to the orientation of both the drive shaft 2 and the output shaft 1.
• the tilting by the angle ⁇ and the asymmetric gap 50 will be explained later.
• the working machine 20 and the drive 10 can be flanged together be and form a modular device, such as a downhole delivery unit, in which the drive 10 is designed as an electric motor and the working machine 20 as a pump. It is also possible that a propeller shaft head is arranged directly on the output shaft 1 or the drive shaft 2, so that the interposition of a separate propeller shaft 16 can be omitted.
• the drive 10 and the machine 20 are leak-free and static separated.
• FIG. 2 shows a schematic sectional view of a variant of the embodiment according to FIG. 1, in which, instead of a separate propeller shaft 16 with two propeller shaft heads 14, 24, only one propeller shaft head 24 is provided at one end of an output shaft 1 of a drive (not shown) , FIG. 2 shows the tilt angle .alpha. Which shows the offset of the rotation axis 240 of the output shaft 1 or the articulated shaft head 24 to the rotation axis 200 of the drive shaft 2 of the work machine 20. The tilt takes place in the center of the guide bearing 5 within the gap pot 3.
• the propeller shaft head 24 By connecting the propeller shaft head 24 directly to the output shaft 1, it is possible to couple a drive 10 and a working machine 20 at a short distance with each other and there compensate for a mounting offset between the drive 10, not shown, and the machine 20 shown schematically and beyond the To realize advantages of a non-contact and otherwise decoupled torque transmission.
• the propeller shaft head 24 may be integrally formed with the output shaft 1 or fixed to the output shaft 1 positively or cohesively, for example by screwing, a Polygonalvertechnikung or welding or else via dowel pins or feather keys.
• FIG. 3 A further variant of the invention is shown in FIG. 3, in which a direct connection of a schematically illustrated drive 10 via an output shaft 1 and a propeller shaft head 14 without a containment shell 3 to a hub 11 is shown. Again, the tilt angle ⁇ can be seen, which is present between the axis of rotation 140 of the output shaft 1 and the axis of rotation 200 of the drive shaft 2.
• the rod ends 14, 24 are formed with a substantially cylindrical circumferential wall which is received in the likewise substantially cylindrical cavity 12, 22 of the respective hub 11, 21 are. Due to the tilting by the angle ⁇ results in an asymmetrical gap 50, which is indicated in the drawing.
• the upper end of the articulated shaft head 24 facing the drive is substantially closer to the containment shell 3 than the opposite lower end, since the axis of rotation 140 of the output shaft 1 is tilted upwards, while in the illustration according to FIG Cardan shaft head 14 is substantially closer to the magnet 13 than the upper end.
• the pivot point of the tilting so the center of the respective guide bearings 4, 5 in the middle of the length of the inner and outer magnets, at least in the middle of the outer magnets, so that there is a uniform torque transmission, as in this way a uniform Torque transmission distribution takes place.
• the inner magnets preferably do not protrude out of the cavity in order to avoid transmission losses.
• FIG. 4 shows a further variant of the invention in which the basic structure corresponds to that according to FIG. 2, the explanations regarding FIG. 2 apply correspondingly, but with the difference that a drive or motor 10 is directly connected via an output shaft 1 a hub 21 acts in which the inner magnets 23 are arranged circumferentially as a second set of magnets.
• a split pot 3 is arranged in the cylindrical recess or in the cylindrical cavity 22 within the hub 21, the split pot 3 may have an outer diameter which corresponds to the inner diameter of the cavity 22 substantially.
• the gap shown in Figure 4 between the cavity 22 and the outer contour of the gap pot 3 can be minimized in the assembled state of the split pot 3.
• the propeller shaft head 24 is tilted by the angle ⁇ .
• the drive shaft 2 is formed for a work machine 20, not shown, or fixed thereto in another embodiment, for example via a feather key, a press fit or via another positive connection.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=57394604

Family Applications (1)

Country Status (6)

Families Citing this family (3)

Family Cites Families (18)

• 2015
  • 2015-12-21 DE DE102015122404.6A patent/DE102015122404B4/de active Active
• 2016
  • 2016-11-25 EP EP16801266.4A patent/EP3394966A1/de not_active Withdrawn
  • 2016-11-25 CA CA3007136A patent/CA3007136A1/en not_active Abandoned
  • 2016-11-25 US US16/062,939 patent/US10886830B2/en active Active
  • 2016-11-25 RU RU2018122623A patent/RU2713737C2/ru not_active IP Right Cessation
  • 2016-11-25 WO PCT/EP2016/078869 patent/WO2017108334A1/de active Application Filing

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