Adjustable-gap permanent-magnet clutch

FIELD: electrical engineering; magnetic clutches with engageable permanent-magnet rotors and conductors separated by air gaps.

SUBSTANCE: proposed magnetic clutch has first and second shafts with parallel axes of revolution; case or wiring unit disposed on first shaft about its axis of revolution; permanent-magnet rotor disposed on second shaft and passed into case in radial direction from second shaft; two electricity conducting parts resting on case or wiring unit for displacement and separated from magnets with air gaps on opposite ends of rotor; as well as air gap adjusting device designed for controlling axial position of electricity conducting parts of conductors in axial direction relative to case and for random variation of air gaps.

EFFECT: simplified design and facilitated servicing due air-gap adjustment system easy-to-use on site upon clutch installation.

24 cl, 4 dwg

 

The present invention relates to magnetic coupling having cooperating rotors with permanent magnets and the rotor conductors separated by air gaps.

Coupling with the permanent magnets of the General type described in U.S. patent No. 5,477,094, have a rotor with magnets and the rotor conductors that interact to transmit power from the driving shaft to the follower shaft. The rotor magnets has lots located on the periphery at intervals of permanent magnets having opposite poles separated by an air gap from the conductive elements of the conductors is made on the rotor conductors on opposite sides on the axis of the rotor with magnets. In many cases, it is preferable that the air gap can be easily adjusted after installation of the coupling to retrieve or modify the "soft start" at launch, and meant that, initially, at the start there has been a marked slipping during rotation between the rotors, which gradually decreases to a minimum for a few seconds, when the speed of the driven shaft increases from zero to maximum. Less starting torque is required in order to transmit a given load, if the coupling is connected with the load so that when this happens the soft start, observed during start-up. Also, when provided me the cue start, is less impetus in the transmission of power.

The regulation of the air gap provides an opportunity to make this magnetic coupling suitable for maximum performance in applications for various loads without the necessity of changing the number of magnets in the rotor with magnets. Such regulation after installing the clutch allows adjustable soft start clutch without removing or disconnecting the clutch, if the load on the device has changed.

The present invention is a system of regulation of the air gap, which can simply be used in place after installation of the coupling. In accordance with the present invention the rotor with the magnets mounted on the same shaft, and a casing surrounding the rotor with magnets installed on the second coaxial shaft. In a preferred constructive executions pair of electrically conductive nodes, separated by air gaps from opposite ends of the rotor with magnets mounted on the housing slidable to change the air gaps. The adjusting screws or other adjusting devices are located coaxially between the housing and the conductive nodes in order to change the air gaps along the axis in accordance with rotation of the adjusting device and thereby to move e antropologia nodes along the axis relative to the body.

In the drawings:

figure 1 depicts the coupling in cross section along the axis of rotation of the coupling on the first structural implementation of the invention;

figure 2 is a similar view in section on the second constructive implementation;

figure 3 is a detailed view in section along the line 3-3 in figure 2;

4 is a view of the coupling in section, showing a third structural implementation of the invention;

5 is a detailed view in transverse section along the line 5-5 in figure 4.

In the drawings is shown a housing 10 and a rotor 12 with magnets installed through sleeves 14, 15 in coaxial master and slave shafts 16, 17 respectively. The housing 10 has a mounting plate 18 is attached by bolts 19 to the sleeve 14, and has an annular mounting plate 20, which is held in parallel with a gap relative to the disk 18 by sets located on a periphery spaced stud bolts 22. Each of these stud bolts has a Central rod 22A and the end of the threaded sections 22b, 22p, combined with the annular ledges 22d. These benches are in engagement with the annular slots 23 that are connected with the screw holes 24 and smooth holes 25, the processed scan near the outer perimeter of the mounting parts 18, 20. The nut 26 is screwed on the threaded end sections 22b, 22p bolts 22 to hold the bolts and mounting parts 18, 20 together in videpoker block.

In a corresponding pair of sleeves with ledges 27A, 27b includes rods bolts 22A in order to serve as a guide parts for the pair of nodes conductors 28, 29, containing a pair of conductive rings 30A, 30b, preferably copper, and a pair of magnetic support rings 31A, 31b, preferably of mild steel. Conductive ring attached to the support ring by means of screws 32, having rods that are screwed into the base part 31A, 31b, and tapered head included in rings 30A, 30b flush with the ends of the rings, which are located near the rotor 12 with magnets. Additional holes 33a, 34a in the rings 30A-30b and 31A-31b are bushings 27A, 27b.

In the support rings 31A, 31b are tapered hole 36 located so that they coincide with the screw holes 37 in the mounting parts 18, 20 of the housing 10. The adjustment screws 38 threaded into holes 37 and have conical heads 38A, which freely rotates in a conical holes 36 in the support rings 31A, 31b in accordance with the rotation tool the outer ends of the bolts. For placement of the tool, the ends of the bolts 38 can be made with holes and hollows, or be outside the flats. The bolts 38 are a pair of lock nuts 39.

It should be noted that since the head 38A of the adjusting screws 38 are held in conical holes 36 through overlap is their conductive rings 30A, 30b, the rotation of the bolts 38 results in axial displacement of nodes conductors 28, 29, and thereby adjust the width of the air gaps 40, 41 between the conductive rings 30A, 30b and a set of permanent magnets 42, which are available in the rotor 12 with magnets. These magnets are installed in a number of paired holes 43, placed in the shape of a circle, which passes through the disc 44 of the rotor with magnets of a nonmagnetic material. The disk 44 is installed by means of bolts 46 on the sleeve 15.

Describes the coupling has a sleeve 14, 15, mounted on shafts 16, 17 by means of coupling sleeves 46, 46'and tightened in place by screws 46a. Before Assembly of the coupling on the shafts 16 and 17, the support rings 31A, 31b are usually set by the adjusting bolts 38 on the mounting plate 18 and the mounting ring 20 once inserted into the sleeve 27A, 27b, and then the electroconductive rings 30A, 30b are mounted by means of screws 32 to the support rings to form subassemblies. Further, the sleeve 14 and the subassembly containing the disk 18 and the node conductor 28, mounted on the shaft 16, and the other subassembly containing ring 20 and the node conductor 29 is inserted over the open end of the shaft 17 in order to freely encircle the shaft. The next stage is to install the rotor Assembly 12 with magnets on the sleeve 15, which is located on the shaft 17. Then installed the bolts 22 by insert and the forward end through the mounting parts 18, 20 and sleeve 27A, 27b so that when installed the nut 26, the housing 10 is assembled with the nodes of conductors 28, 29 supported on the housing and separated by air gaps 40, 41 of magnets 42.

When the shaft 16 is driven by the first actuator, the electrically conductive parts 30A, 30b are induced eddy currents by the magnetic flux generated by the magnets and limited iron base parts 31A, 31b. In the magnetic effect generated in the conductive parts 30A, 30b, causing repulsion of nodes conductors 28, 29 of the rotor 12 with magnets and causes rotation of nodes conductors 28, 29 and the housing 10 in the start shaft 17 in response to rotation of the shaft 16, but with less speed, which is defined as the slip. Slipping when you start and limit slipping after a run is determined by the width of the air gaps 40, 41. The adjusting screws 38 give the opportunity to adjust the air gaps after the clutch is installed and operates under a specific load, which occurs at the site of use. Air gaps are adjusted by trial and error to fine tune soft start and slippage when working, the most optimal for the observed conditions.

To achieve a uniform regulation of screws 38 on the supporting parts 18, 20 can be Nan is received indicator mark, waste in the form of rays from the periphery of the openings of the holes 37, to coincide with the longitudinal indicator groove in the screw. Also the calibration strip can be inserted in the air gap, and the bolts 38 are tightened up until the same delay not determined calibration strips. Although it is generally preferable to have the air gaps 40, 41 of the same width, it is not essential to the effective operation of the coupling.

Figure 2 and 3 shows a second structural implementation of the invention in which the modified specific adjustment mechanism. On the other hand, those items that are similar to the first design implementation, will be denoted by the same numbers of links. In the second constructive execution of the set of nodes of the adjusting bolt 50 is located between the spacer bolts 22 and extends parallel to them. Each node of the adjusting bolt 50 contains elements 51-52 bolts, United stub coupling 53. Element 51 of the bolt has a section 51A, round head, an intermediate threaded section 51b and the plot is in the form of a rod, preferably with one or more flats 51d, such as provided by a square cross-section, for example, as shown in figure 3. Similarly, the element 52 of the bolt has a section 52a in the form of a round head, an intermediate threaded section 52b and the plot is in the form of a rod, etc is doctitle with one or more flats, supplementing the plot is in the form of a rod. The threads on the threaded sections 51b-52b have the same step, but in the opposite direction of turns. Coupling sleeve 53 has a longitudinal through hole 53A of such form that it came in and were driven plots s, s in the form of rods, so that when the elements 51 and 52 of the bolt connects together the stub clutch 53, the elements of the bolt to be rotated in unison. The number of screws 54, 54' are screwed into the radial holes near opposite ends of the coupling 53 to engage with the flats plots s, s in the form of rods and keep the sleeve from moving forward end relative to the associated node of the bolt 50. Areas in the form of head 51, 52a of the elements of the bolt is made with peripheral grooves, so they went With-clamps 56 and the outer end there are cracks, or they are given another form, so they went screwdriver or other tool to selectively rotate the nodes of the adjusting bolts 50.

To accommodate members 51-52 regulating screw in the mounting plate 18, the nodes of conductors 28 and 29 and the mounting plate 20 made a number of corresponding holes. The holes in the nodes of conductors 28 and 29 have the opposite direction of the threads to match the threaded portions 51b, 52b, respectively, of the elements of the adjusting bolt, and the hole in tajnyh parts 18, 20 preferably have such a size that they slidable included elements 51-52 bolt.

When the nodes of the adjusting bolts 50 are in position, they are screwed into the nodes of conductors 28, 29, go outside through the mounting elements 18, 20 of the housing 10 and held from movement forward end relative to the housing by means of C-shaped clips 56. Obviously, when the nodes of the adjusting bolts 50 are rotated, the result of such axial displacement of nodes conductors 28, 29 along the spacers 22 in the direction of the rotor 12 with magnets or rotor with magnets depending on the direction of rotation selected for the nodes of the adjusting bolts. Thus, the same regulation air gaps 40, 41 can only be achieved by successive rotation of the nodes of the bolts 50.

The Assembly according to the second structural implementation is similar to the Assembly on the first constructive implementation except that the stage of installation of the adjustment bolt 38 is omitted, and the nodes of the adjusting bolts 50 with C-shaped clips 56 are preferably at the place at the last stage after the completion of the housing Assembly by installing the spacer bolts 22. Installing nodes bolts 50 can be made by screwing element 51 of the bolt in the node conductor 28, and the node conductive the spacecraft is in the position with the maximum gap adjacent to the mounting plate 18, and similarly, by screwing another element 52 of the bolt in the node conductor 29, the latter is in position with the maximum gap adjacent to the mounting plate 20, after sliding sleeve couplings 53 completely through the rod s. During the described installation elements 51, 52 of the bolt they are screwed into the nodes of conductors 28, 29 and until the C-shaped clips 56 is in contact slightly with the outer surfaces of the mounting plate 18 and mounting plate 20. Further, the clutch 53 is partially slid over the forward end of the connecting rod s, and set screws 54, 54' will be applied to the rods s, s. In the described device, the clutch 53 causes the elements 51, 52 of the bolt to rotate in unison, and the node of the set screws 54, 54' prevents their separation, and C-clamps 56 to prevent movement of the node of the adjusting bolt 50 forward end relative to the housing 10. Obviously, in this constructive implementation of the annular ledge can be performed on the elements 51, 52 of the bolt in the place of the C-shaped clips 56.

Figure 4-5 shows a third structural performance, in which the mechanism of regulation of gap contains a screw turnbuckles 70 located between the nodes of the conductors and between the spacer bolts 22. Each screw clamping sleeve 70 has two non-rotating rod 71-72 bolt, images is the R with a threaded opposite end sections 71A-72A, which is screwed in the Central stub coupling 73. Thread end sections 71A-72A have opposite directions of the threads and is complemented by a thread in the bore of the sleeve 73 so that when the sleeve is rotated, the rods 71-72 move in unison in the direction of one another or in the opposite direction depending on the direction in which turns the clutch. Terminals 71-72 screw turnbuckles may be held in fixed engagement with the rotors 28, 29 with conductors in any suitable way. For example, U-shaped clamp 74 can be fitted to the terminals 71-72 and mounted on the rim of the rotor conductors. In this case, U-clamps 74 may have a bifurcated rack a, 74b, fitted to the grooves 75 in terminals 71-72. As shown in figure 5, plots with the grooves in the rods may have a square cross section for the formation of the flats included in engagement with the flat inner edges s forked uprights a, 74b of the clip. The screws 76 pass through the Central rib 74d U-shaped clamps and then are screwed into the rim of the rotor conductors to secure the clamps 74 and screw coupling coupling 70. Clutch 73 are preferably hexagonal outer shape for engagement with a wrench for adjustment or have radial holes, which sets the tool to rotate the coupling to regularestrictions or compression screw compression couplings, to increase or decrease air gaps 40-41.

Although it is preferable to have a rotor with magnets located between two items conductors 30A-30b, the housing 10 may have two rotors with magnets instead of elements of conductors and one rotor conductors instead of the rotor with the magnets 12. In this case, the rotor conductors should preferably contain two conductive rings located on opposite sides of the iron disk, secured by bolts 46 to the sleeve 15.

From the preceding it should be clear that although there have been described specific structural embodiment of the invention for illustration, may be made of various modifications without going beyond the ideas and scope of the invention. Accordingly, the invention is not limited by anything except the attached claims.

1. Adjustable magnetic coupler containing the first and second rotating shafts having parallel axes of rotation, the housing, located on the first shaft and surrounding the axis of rotation, a rotor with permanent magnets, located on the second shaft passing inside in the radial direction from the second shaft, two electrically conductive node, based on the body can be moved and separated by air gaps from the magnets on opposite ends of the rotor, and is a device to control the gaps for controlling the axial location of the conductive nodes conductors in the axial direction relative to the housing and the rotor to selectively change the air gaps.

2. The coupling according to claim 1, in which the housing includes elongated parts are parallel to the axis, and the nodes of conductors mounted for sliding on the specified details.

3. The coupling according to claim 2, in which the device is to control the gaps includes adjusting bolts located between the casing and the nodes conductors during rotation which changes the air gap by moving the nodes of the conductors along the details.

4. The coupling according to claim 2, in which the device for controlling the clearance includes a screw turnbuckles, passing between nodes conductors to selectively move the nodes conductors in unison in opposite directions toward or away from the rotor to change the air gaps.

5. The coupling according to claim 2, in which the device for controlling the clearance includes the site of the adjusting bolt with a threaded sections having opposite direction of the threads and made interoperable with nodes conductors so that the rotation of the node of the adjusting bolt respectively moves the nodes of conductors in unison in opposite directions.

6. The coupling according to claim 1, in which the frame includes a mounting disk that is located on the first shaft, mounting ring, separated along the axis of the gap from the mounting disk and the spacer parts, passing between the disk and the ring radially outward of the rotor, moreover, the conductive nodes are installed with the possibility of sliding spacer on the details.

7. The coupling according to claim 6, in which the device for controlling the gap contains the first set of bolts, regulatory clearance, located between the mounting disk and one of the electrically conductive node, and a second set of bolts, regulatory clearance, located between the mounting ring and the other conductive node.

8. The coupling according to claim 7, in which the first set of bolts, regulatory clearance, has a threaded connection with mounting disk, and a second set of bolts, regulatory clearance, has a threaded connection with a mounting ring.

9. Adjustable magnetic coupler containing the first and second rotating shafts having an axis of rotation, the mounting hub on the first shaft and surrounding the axis of rotation, a rotor with permanent magnets, located on the second shaft, electrically conductive nodes based on an Assembly slidable and separated by air gaps from the magnets on opposite ends of the rotor, and the nodes of the adjusting bolts included in engagement with the conductive nodes for selective movement along the axis relative to the mounting hub and rotor to regulate the width of the air gaps.

10. The coupling according to claim 9, in which each node of the adjusting bolt has a head, pregnancy which can be rotated to electrically conductive nodes, and rods, fitting the screw to the mounting hub, whereby rotation of the bolt causes the axial displacement of the conductive nodes.

11. The coupling according to claim 9, in which each node of the adjusting bolt has two separated by a gap of the threaded section, fitting the screw to the corresponding conductive nodes and having the opposite direction of the threads, whereby during rotation of the nodes of the adjusting bolts are moved electrically conductive nodes in unison in opposite directions.

12. Adjustable magnetic coupler containing first and second coaxial rotating shafts having an axis of rotation, the housing, located on the first shaft and surrounding the axis of rotation, a rotor with permanent magnets, located on the second shaft and passing in the radial direction inside the housing, while the permanent magnets form two rows of poles facing in opposite directions parallel to the axis of the rotor, and the first and second nodes of conductors mounted slidable on the housing for axial movement and provided with conductive elements in the housing, separated by air gaps from the corresponding elements of the rows of poles, and tilt control gap device, incoming in engagement with the nodes of conductors to selectively move the nodes of the wire is of IKI-axis in opposite directions relative to the rotor magnets and the housing in accordance with the rotation of the control gap device.

13. Clutch indicated in paragraph 12, in which each controlling a gap of the device is made with the possibility of engagement with the casing and one of the nodes conductors.

14. Clutch indicated in paragraph 12, in which the control gap device is located between nodes conductors and operates through each thread having the opposite direction of the coils.

15. The clutch on 14 in which each of the control gap device includes a screw coupling coupling.

16. The clutch on 14, in which the thread from the opposite direction of coils driven to complementary threads on the nodes of the conductors.

17. Adjustable magnetic coupler containing first and second coaxial rotating shafts having an axis of rotation, the housing, located on the first shaft and surrounding the axis of rotation, a rotor with permanent magnets, located on the second shaft and passing in the radial direction inside the housing, while the permanent magnets create two rows of poles facing in opposite directions parallel to the axis of rotation, the first and second nodes of conductors mounted slidable on the housing for axial movement and provided with a conductive units that are separated by air gaps from the corresponding elements of a number of poles, and a rotating device for regulating a gap located between nodes Provo is nicks parallel to the axis of rotation and configured to move the nodes of conductors in unison in opposite directions in accordance with the rotation of the specified device.

18. The clutch on 17, in which the device for controlling the gap contain a node of the adjusting bolt with a threaded sections having threaded opposite direction of turns and the current in such a way that the rotation of the node of the adjusting bolt respectively moves the nodes of conductors in unison in opposite directions.

19. Adjustable magnetic clutch comprising two shaft coaxial with the axis of rotation, the first group having two rows of magnetic poles, a second group having two conductive element separated by respective air gaps from the corresponding number of poles, building, situated on one of the shafts and having two separated by a gap along the axis of the mounting element, which relies on one of the specified groups, the rotor located on the other shaft, which is based on another group, and the mechanism supported on the housing for axial movement of one of these groups relative to the mounting elements, for example, to change the air gaps.

20. Adjustable magnetic coupler according to claim 19, in which the first group is supplied by the magnets passing through the rotor, and the second group is on the case.

21. Adjustable magnetic coupler according to claim 19, in which the second group is located on the opposite sides of the rotor, and the first group is equipped with two the diversified spaced along the axis of the rows of magnets, based on the housing and operatively connected to the mechanism.

22. Adjustable clutch according to claim 19, in which the mechanism is a device which is driven by the screw.

23. Adjustable clutch according to claim 19, in which the group, based on housing, mounted for sliding on the guide member on the housing, located between the mounting elements, and the mechanism is a screw mechanism, passing through the mounting elements.

24. Adjustable clutch for item 23, in which the screw mechanism is a screw mechanism type coupling screw coupling.



 

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