Magnetic dome element with magnetic bearing function

Abstract

Magnetic coupling element (100) with a magnetic bearing function, the magnetic coupling element (100) having the following features: - a drive-side clutch magnet (109) arranged on a drive shaft (106); - an output-side clutch magnet (115) arranged on an output shaft (112), wherein the output-side clutch magnet (115) is magnetically coupled to the input-side clutch magnet (109); and - a bearing magnet ring (118) which is arranged in a rotationally fixed manner relative to the drive-side or output-side clutch magnet (109, 115), wherein at least one bearing magnet sub-region (133, 136) of the bearing magnet ring (118) has the same polarity as a clutch magnet sub-region (127, 130) opposite the bearing magnet sub-region (133, 136).

Description

State of the art

[0001] The invention is based on a magnetic coupling element with a magnetic bearing function and a method for producing a magnetic coupling element with a magnetic bearing function according to the preamble of the independent claims. The present invention also relates to a computer program.

[0002] Magnetic coupling elements can be used, which utilize opposing pairs of magnets to transmit torque without contact. Furthermore, diverting elements can be used to guide a magnetic flux, thus increasing the transmittable torque and enhancing the efficiency of the coupling element.

[0003] DE 20 2005 020 288 U1 describes a radial rotary coupling comprising a radially outer and a radially inner coupling part, which is coupled to the radially outer coupling part by magnetic force. This magnetic force is generated by permanent magnets attached to the outer side of the radially inner coupling part and the inner side of the radially outer coupling part.

[0004] DE 11 65 144 A discloses a pump with an impeller connected to a magnetic ring, which is rotatably mounted in a magnetic bearing. The impeller is coupled to the drive shaft of an electric motor by magnetic force, with an oxide magnetic ring, coaxial with the impeller and firmly connected to the drive shaft, projecting into the magnetic ring of the impeller.

[0005] US 2009 / 0 004 037 A1 describes a machine with a drive shaft and a magnetic bearing, as well as an output shaft that is rotatably mounted coaxially to the drive shaft. The drive shaft and output shaft are coupled by magnetic force, with a ring magnet firmly connected to the output shaft extending into a magnet assembly connected to the drive shaft. Disclosure of the invention

[0006] Against this background, the approach presented here presents a magnetic coupling element with a magnetic bearing function, a method for producing a magnetic coupling element with a magnetic bearing function, a device using this method, and finally a corresponding computer program according to the main claims. The measures listed in the dependent claims enable advantageous refinements and improvements of the device specified in the independent claim.

[0007] By means of an additional bearing magnet ring, which is arranged offset to the coupling magnets within a magnetic coupling element, a bearing function can also be achieved in the radial direction, for example.

[0008] A magnetic dome element with a magnetic bearing function is presented, wherein the magnetic dome element comprises the following features: - a drive-side clutch magnet arranged on a drive shaft; - an output-side clutch magnet arranged on an output shaft, wherein the output-side clutch magnet is magnetically coupled to the input-side clutch magnet; and - a bearing magnet ring which is arranged in a rotationally fixed manner relative to the drive-side or output-side clutch magnet, wherein at least one bearing magnet sub-region of the bearing magnet ring has the same polarity as a clutch magnet sub-region opposite the bearing magnet sub-region.

[0009] A drive shaft can be a rod-shaped machine element used to transmit rotary motion and torque, as well as to support rotating parts. A clutch magnet can be a type of coupling element whose torque transmission function is based on the effect of a magnetic field or a coupled magnetic field. An output shaft can be a machine element at which the power introduced via the gear mechanism can be tapped at its shaft end in the form of machine power. A bearing magnet ring can be a magnet that is at least partially ring-shaped and enables bearing support without material contact through magnetic forces. Overall, it should be noted that the approach presented here advantageously uses permanent magnets as magnets.

[0010] According to one embodiment, the bearing magnet ring and the drive-side or output-side clutch magnet can have magnetic poles that attract each other in the axial direction and repel each other in the radial direction. This can result in a significant reduction in friction losses, while improving efficiency, heat generation, and wear.

[0011] According to one embodiment, the drive-side and output-side clutch magnets can each have at least clutch magnet sub-regions with different polarities, in particular, wherein the two clutch magnet sub-regions are arranged or aligned in the axial direction. This can result in an improved entrainment effect through an optimization or alignment of the magnetic flux lines in the magnetic coupling element.

[0012] According to one embodiment, the bearing magnet ring can comprise at least two bearing magnet ring sections of different polarity, in particular wherein the two bearing magnet ring sections are arranged next to one another in the axial direction. Such a structure of axially adjacent and mirror-imaged bearing magnet ring sections can be manufactured more cost-effectively and easily and / or provides an improved bearing function.

[0013] According to one embodiment, the bearing magnet ring can surround at least a portion of the drive-side or output-side clutch magnet. This allows a comparatively large repulsion force to be achieved between the bearing magnet ring and the spaced-apart, opposite, drive-side or output-side clutch magnet, thus ensuring a stable bearing function.

[0014] According to one embodiment, the bearing magnet ring section can have an angular offset from the opposite clutch magnet section of the drive-side or output-side clutch magnet. The angular offset can serve to compensate for the relative rotation of the two shafts during bearing support when torque is applied.

[0015] According to one embodiment, the bearing magnet ring can be radially surrounded by the drive-side or output-side coupling magnet. In this case, the magnetic fields emanating radially from the drive-side or output-side coupling magnet can be concentrated, and the magnetic force between the individual parts of the magnetic coupling element can be amplified.

[0016] According to one embodiment, the bearing magnet ring can be separated from the drive-side or output-side coupling magnet by a tubular portion of a housing element. This allows for media separation, especially if the magnetic coupling element is to be used in areas with fluid flow.

[0017] According to one embodiment, the housing element can be made of a non-magnetic metal or material and / or be non-rotatable or non-rotatable. Such a housing element can prevent losses due to remagnetization of the housing element.

[0018] A method for producing a magnetic coupling element with a magnetic bearing function is further presented, the method comprising the following steps: Providing the drive-side clutch magnet arranged on a drive shaft, the output-side clutch magnet arranged on an output shaft, and the bearing magnet ring; and Mounting the drive-side clutch magnet arranged on the drive shaft, the output-side clutch magnet arranged on an output shaft and the bearing magnet ring in such a way that the output-side clutch magnet is magnetically coupled to the drive-side clutch magnet and the bearing magnet ring is arranged in a rotationally fixed manner relative to the drive-side or output-side clutch magnet, wherein at least one bearing magnet portion of the bearing magnet ring has the same polarity as a clutch magnet portion opposite the bearing magnet portion in order to produce a magnetic coupling element with a magnetic bearing function.

[0019] This method can be implemented, for example, in software or hardware or in a mixed form of software and hardware, for example in a control unit.

[0020] The approach presented here further provides a device configured to perform, control, or implement the steps of a variant of a method presented here in corresponding devices. This embodiment of the invention in the form of a device also allows the problem underlying the invention to be solved quickly and efficiently.

[0021] For this purpose, the device can have at least one computing unit for processing signals or data, at least one memory unit for storing signals or data, at least one interface to a sensor or an actuator for reading sensor signals from the sensor or for outputting data or control signals to the actuator, and / or at least one communication interface for reading or outputting data embedded in a communication protocol. The computing unit can be, for example, a signal processor, a microcontroller, or the like, wherein the memory unit can be a flash memory, an EEPROM, or a magnetic storage unit.The communication interface can be designed to read in or output data wirelessly and / or wired, wherein a communication interface that can read in or output wired data can read this data, for example, electrically or optically from a corresponding data transmission line or output it to a corresponding data transmission line.

[0022] In this case, a device can be understood as an electrical device that processes sensor signals and outputs control and / or data signals depending on them. The device can have an interface, which can be implemented in hardware and / or software. In a hardware implementation, the interfaces can, for example, be part of a so-called system ASIC, which contains a wide variety of functions of the device. However, it is also possible for the interfaces to be separate integrated circuits or to consist at least partially of discrete components. In a software implementation, the interfaces can be software modules that are present, for example, on a microcontroller alongside other software modules.

[0023] Also advantageous is a computer program product or computer program with program code that can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory and is used to carry out, implement and / or control the steps of the method according to one of the embodiments described above, in particular when the program product or program is executed on a computer or a device.

[0024] Examples of the approach presented here are shown in the drawings and explained in more detail in the following description. It shows: Fig. 1 is a schematic cross-sectional view of a magnetic coupling element with a magnetic bearing function according to an embodiment; Fig. 2 a schematic cross-sectional view of a variant of a magnetic coupling element with a magnetic bearing function according to an embodiment; Fig. 3 a schematic cross-sectional view of a variant of a magnetic coupling element with a magnetic bearing function according to an embodiment; Fig. 4 is a flowchart of an embodiment of a method for manufacturing a magnetic coupling element with a magnetic bearing function according to an embodiment; and Fig. 5 is a block diagram of an apparatus for carrying out a method for producing a magnetic coupling element with a magnetic bearing function according to an embodiment.

[0025] In the following description of advantageous embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, whereby a repeated description of these elements is omitted.

[0026] Fig. 1 shows a schematic cross-sectional view of a magnetic coupling element 100 with a magnetic bearing function according to an embodiment.

[0027] The magnetic coupling element 100 comprises a housing element 103, a drive-side clutch magnet 109 arranged on a drive shaft 106, an output-side clutch magnet 115 arranged on an output shaft 112, and a bearing magnet ring 118. The different poles of the clutch magnets 109 and 115 as well as of the bearing magnet ring 118 are marked with different colors, with the north pole being represented by an "N" and the south pole by an "S."

[0028] The output-side clutch magnet 115 is magnetically coupled to the drive-side clutch magnet 109. The drive-side and output-side clutch magnets 109 and 115 each have at least clutch magnet subregions 121, 124, 127, 130 with different polarities, wherein the clutch magnet subregions 121, 124, 127, 130 are arranged in particular in the axial direction. The bearing magnet ring 118 also comprises at least two bearing magnet ring subregions 133, 136 with different polarities, wherein the two bearing magnet ring subregions 133 and 136 are also arranged in particular in the axial direction. The bearing magnet ring 118 surrounds at least one subregion 127 and 130 of the drive-side clutch magnet 109.The bearing magnet ring 118 is arranged in a rotationally fixed manner relative to the drive-side or output-side clutch magnets 109 and 115, wherein each bearing magnet sub-region 133 and 136 of the bearing magnet ring 118 has the same polarity as a clutch magnet sub-region 127 and 130 opposite the bearing magnet sub-region 133 and 136. The bearing magnet ring 118 and the drive-side clutch magnet 109 have magnetic poles that attract each other in the axial direction and repel each other in the radial direction.

[0029] The drive shaft 106, which according to one embodiment is a motor shaft, and the output shaft 112 each carry magnetic dipoles, resulting in a preferably axially parallel magnetic flux. Since different poles attract each other, the output shaft 112 is driven in the direction of rotation when the drive shaft 106 rotates. The resulting axial force is absorbed by an axial bearing (not shown here). Magnetic return plates are also included in the Fig. 1 not shown. Depending on the applied torque, the two shafts 106 and 112 rotate relative to each other by a few degrees.

[0030] In order to implement a radial bearing function, the bearing magnet ring 118 is connected in a rotationally fixed manner to one of the clutch magnets, which according to one embodiment is the drive-side clutch magnet 109, so that radially repelling poles face each other. The bearing magnet ring 118 is thus centered relative to the drive-side clutch magnet 109. If this bearing is extended axially parallel, this arrangement can take over the complete radial bearing of a shaft. During design, it is important to ensure that the clutch magnets 109 and 115 are significantly stronger than the bearing magnet ring 118 in order to guarantee torque transmission. This ensures that the repelling orThe attractive forces of the clutch magnets 109 and 115 are not capable of generating a rotation of the bearing magnet ring 118 on the shaft relative to those in the housing element 103, which would lead to an attractive force between the bearing magnets. The clutch magnets 109 and 115 as well as the bearing magnet ring 118 can, in principle, also be magnetized with 2, 4, 6, etc. poles.

[0031] The present magnetic coupling element 100 can be particularly advantageous in all types of drives where torque transmission is required without the use of a shaft sealed by a seal, and where a radial bearing for the output-side coupling magnet 115 is also required. This is the case, for example, in metering and micropumps for driving impeller-shaped impellers. A particular advantage is offered in drives where media separation is desired on the input and output sides.

[0032] Fig. 2 shows a schematic cross-sectional view of a variant of a magnetic coupling element 100 with a magnetic bearing function according to an embodiment. Fig. The magnetic coupling element 100 shown in Figure 2 may, for example, be a variation of the one shown in Fig. 1 shown magnetic coupling element 100.

[0033] The magnetic coupling element 100 comprises the housing element 103, the drive-side clutch magnet 109 arranged on the drive shaft 106, the output-side clutch magnet 115 arranged on the output shaft 112, and the bearing magnet ring 118. The different poles of the clutch magnets 109 and 115, as well as the bearing magnet ring 118, are marked with different colors, with the north pole shown in light gray and the south pole in dark gray. The output-side clutch magnet 115 is magnetically coupled to the drive-side clutch magnet 109. The bearing magnet ring 118 is arranged in a rotationally fixed manner relative to the drive-side or output-side clutch magnets 109 and 115, wherein the bearing magnet sub-regions 133 and 136 of the bearing magnet ring 118 have the same polarity as the clutch magnet sub-regions 127 and 130 opposite the bearing magnet sub-regions 133 and 136. A bearing magnet ring sub-region 201 has an angular offset 203.

[0034] The bearing magnet ring section 136 has an angular offset of 203 from the opposite clutch magnet section 130 of the drive-side clutch magnet 109. To compensate for the rotation of the two shafts 106 and 112 and the clutch magnets 109 and 115 that occurs when torque is applied, this can also be accommodated in the angular arrangement. An additional bearing magnet ring 118, which is mounted at an angular offset from one of the clutch magnets 109 or 115, can ensure that, in addition to the axially attractive magnetic poles that perform the clutch function, repulsive poles also face each other in the radial direction, thus fulfilling the bearing function.

[0035] Fig. 3 shows a schematic cross-sectional view of a variant of a magnetic coupling element 100 with a magnetic bearing function according to an embodiment. Fig. The magnetic coupling element 100 shown in Figure 3 may, for example, be a variation of the one shown in Fig. 1 and Fig. 2 shown magnetic coupling element 100.

[0036] The magnetic coupling element 100 comprises the housing element 103, the drive-side clutch magnet 109 arranged on the drive shaft 106, the output-side clutch magnet 115, and a bearing magnet ring 118. The different poles of the clutch magnets 109 and 115 and of the bearing magnet ring 118 are marked with different colors, with the north pole shown in light gray and the south pole in dark gray. The bearing magnet sections 133 and 136 of the bearing magnet ring 118 have the same polarity as the clutch magnet sections 121 and 124 opposite the bearing magnet sections 133 and 136.

[0037] According to one embodiment, the bearing magnet ring 118 is radially surrounded by the output-side clutch magnet 115. Between the bearing magnet ring 118 and the output-side clutch magnet 115 is a tubular portion 303, for example, a thin-walled hollow cylinder, of the housing element 103, which separates the bearing magnet ring 118 from the output-side clutch magnet 115. The housing element 103 is made of a non-magnetic metal and / or is formed to be non-rotating. The housing element 103 provides media separation so that, for example, in a pump drive, the medium to be pumped cannot penetrate into the interior of the motor.

[0038] In general, it can also be stated that the relative strength of the magnets to one another, in particular the relationship between the additional (bearing) magnetic ring and the drive and output-side (coupling) magnets, is designed in such a way that, as described above, with an axially mounted shaft, the repulsive forces of the bearing magnetic field also lead to torques and thus to a weakening of the coupling function. Therefore, the coupling magnets should be designed in such a way that the torque generated during rotation is always dominant. The attractive or repulsive axial forces as well as any flow forces that occur (using the example of a pump) should be largely balanced or absorbed by the aforementioned axial bearing (e.g. ball or plain bearing). Example dimensions of the individual magnetic elements can be on the order of magnitude of the entire coupling in the intended application, with overall lengths of 3 to 5 mm and diameters of approximately 6 mm.The magnets used here can have a magnetic strength of approximately 1.4 Tesla and (depending on temperature) coercive field strengths of -1600 to 0 kA / m.

[0039] Fig. 4 shows a flowchart of an embodiment of a method 400 for manufacturing a magnetic coupling element with a magnetic bearing function according to an embodiment. The method 400 can be carried out using the Fig. 5 for carrying out the method 400 for producing a magnetic coupling element with a magnetic bearing function.

[0040] In a step 403, the drive-side clutch magnet arranged on a drive shaft, the output-side clutch magnet arranged on an output shaft, and the bearing magnet ring are provided. Finally, in a step 406, the drive-side clutch magnet arranged on a drive shaft, the output-side clutch magnet arranged on an output shaft, and the bearing magnet ring are mounted such that the output-side clutch magnet is magnetically coupled to the drive-side clutch magnet, and the bearing magnet ring is arranged in a rotationally fixed manner relative to the drive-side or output-side clutch magnet, wherein at least one bearing magnet portion of the bearing magnet ring has the same polarity as a clutch magnet portion opposite the bearing magnet portion, in order to produce a magnetic coupling element with a magnetic bearing function.

[0041] Fig.5 shows a block diagram of a device 500 for executing a method for producing a magnetic coupling element with a magnetic bearing function according to an exemplary embodiment. The device 500 is configured to execute and / or control the steps of the method for producing a magnetic coupling element with a magnetic bearing function in corresponding units.

[0042] The device 500 comprises a supply device 503 and an assembly device 506. The supply device is configured to provide a manufacturing signal 509 to the assembly device 506 in order to give the assembly device the signal to assemble the individual components of the magnetic coupling element. The supply device 503 is further configured to provide the drive-side clutch magnet arranged on a drive shaft, the output-side clutch magnet arranged on an output shaft, and finally the bearing magnet ring.The assembly device 506 is designed to receive the manufacturing signal 509 in order to assemble the drive-side clutch magnet arranged on the drive shaft, further the output-side clutch magnet arranged on the output shaft, and finally the bearing magnet ring in such a way that the output-side clutch magnet is magnetically coupled to the drive-side clutch magnet and the bearing magnet ring is arranged in a rotationally fixed manner relative to the drive-side or output-side clutch magnet, wherein at least one bearing magnet portion of the bearing magnet ring has the same polarity as a clutch magnet portion opposite the bearing magnet portion in order to produce a magnetic coupling element with a magnetic bearing function.

[0043] If an embodiment comprises an “and / or” link between a first feature and a second feature, this is to be read as meaning that the embodiment according to one embodiment has both the first feature and the second feature and according to another embodiment has either only the first feature or only the second feature.

Claims

[1] Magnetic coupling element (100) with magnetic bearing function, wherein the magnetic coupling element (100) has the following features: - a drive-side clutch magnet (109) arranged on a drive shaft (106); - an output-side clutch magnet (115) arranged on an output shaft (112), wherein the output-side clutch magnet (115) is magnetically coupled to the input-side clutch magnet (109); and - a bearing magnet ring (118) which is arranged in a rotationally fixed manner relative to the drive-side or driven-side clutch magnet (109, 115), wherein at least one bearing magnet sub-area (133, 136) of the bearing magnet ring (118) has the same polarity as a clutch magnet sub-area (127, 130) opposite the bearing magnet sub-area (133, 136). [2] Magnetic coupling element (100) according to claim 1, wherein the bearing magnet ring (118) and the drive-side or driven-side coupling magnet (109, 115) have magnetic poles that attract each other in the axial direction and repel each other in the radial direction. [3] Magnetic coupling element (100) according to one of the preceding claims, wherein the drive-side and the driven-side coupling magnet (109, 115) each have at least coupling magnet sub-areas (121, 124, 127, 130) with different polarity, in particular wherein the two coupling magnet sub-areas (121, 124, 127, 130) are arranged or aligned in an axial direction. [4] Magnetic coupling element (100) according to one of the preceding claims, wherein the bearing magnet ring (118) comprises at least two bearing magnet ring sub-areas (133, 136) of different polarity, in particular wherein the two bearing magnet ring sub-areas (133, 136) are arranged next to each other in the axial direction. [5] Magnetic coupling element (100) according to one of the preceding claims, wherein the bearing magnet ring (118) surrounds at least a partial area of ​​the drive-side or driven-side coupling magnet (109, 115). [6] Magnetic coupling element (100) according to one of the preceding claims, wherein the bearing magnet ring part (201) has an angular offset (203) to the opposite coupling magnet part (130) of the drive-side or driven-side coupling magnet (109, 115). [7] Magnetic coupling element (100) according to one of the preceding claims, wherein the bearing magnet ring (118) is radially surrounded by the drive-side or driven-side coupling magnet (109, 115). [8] Magnetic coupling element (100) according to claim 7, wherein the bearing magnet ring (118) is separated from the drive-side or driven-side coupling magnet (109, 115) by a tubular partial section (303) of a housing element (103). [9] Magnetic coupling element (100) according to claim 8, wherein the housing element (103) is made of a non-magnetic material and / or is shaped to be non-rotating or non-rotatable. [10] Method (400) for manufacturing a magnetic dome element (100) with magnetic bearing function according to any one of the preceding claims 1 to 9, wherein the method (400) comprises the following steps: - Providing (403) the drive-side clutch magnet (109) arranged on a drive shaft (106), the output-side clutch magnet (115) arranged on an output shaft (112), and the bearing magnet ring (118); and - Mounting (406) the drive-side clutch magnet (109) arranged on the drive shaft (106), the output-side clutch magnet (115) arranged on the output shaft (112), and the bearing magnet ring (118) such that the output-side clutch magnet (115) is magnetically coupled to the drive-side clutch magnet (109), and the bearing magnet ring (118) is arranged to be rotationally fixed relative to the drive-side or output-side clutch magnet (109, 115), wherein at least one bearing magnet section (133, 136) of the bearing magnet ring (118) has the same polarity as a clutch magnet section (127, 130) opposite the bearing magnet section (133, 136) in order to magnetically couple the magnetic coupling element (100). To establish a storage function. [11] Device (500) configured to perform and / or control the steps of the method (400) according to claim 10 in corresponding units. [12] Computer program configured to execute and / or control the method (400) according to claim 10. [13] Machine-readable storage medium on which the computer program according to claim 12 is stored.

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