WO2023032812A1 - 軸受及び回転装置 - Google Patents

軸受及び回転装置 Download PDF

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Publication number
WO2023032812A1
WO2023032812A1 PCT/JP2022/032081 JP2022032081W WO2023032812A1 WO 2023032812 A1 WO2023032812 A1 WO 2023032812A1 JP 2022032081 W JP2022032081 W JP 2022032081W WO 2023032812 A1 WO2023032812 A1 WO 2023032812A1
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WIPO (PCT)
Prior art keywords
magnetic
shaft
bearing
rotating device
permanent magnet
Prior art date
Application number
PCT/JP2022/032081
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English (en)
French (fr)
Japanese (ja)
Inventor
啓佐敏 竹内
喬大 壬生
秀明 高柳
Original Assignee
有限会社宮脇工房
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Publication date
Application filed by 有限会社宮脇工房 filed Critical 有限会社宮脇工房
Priority to JP2023515214A priority Critical patent/JP7498990B2/ja
Publication of WO2023032812A1 publication Critical patent/WO2023032812A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
    • C10M103/02—Carbon; Graphite
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication

Definitions

  • the present invention relates to a bearing for a shaft that rotates around a rotating shaft and a rotating device that includes the shaft.
  • the shaft that rotates around the rotation axis and the bearing that supports the shaft are broadly classified into two loads. One of them is the load in the thrust direction (thrust load), and the other is the load in the radial direction (radial load).
  • FIG. 12 is a diagram showing an example of a conventional rotating device 900 .
  • a thrust bearing 990 is arranged on one end side (vertical side) of a shaft 100, and a rotating body 500 is attached to the other end side of the shaft 100.
  • the rotating device 900 is configured such that the rotating body 500 and the shaft 100 rotate around the rotation axis RA while the thrust bearing 990 receives the load of the rotating body 500 and the shaft 100 in the gravitational direction.
  • Reference numeral 300 is a radial bearing.
  • the thrust bearings that receive these loads are also required to have a structure capable of withstanding a large load. is used.
  • the contact area with the shaft 100 is also large, so the frictional resistance due to the load in the thrust direction is also large, and when the rotating body 500 and the shaft 100 rotate, it becomes a large load (rotational load). also resulted in energy loss.
  • the tenon portion (5) which is a part of the shaft (1), is inserted into the bearing (6) on the side that receives the load, and the tenon portion (5) and the bearing (6) are inserted.
  • the bearings (6) are in contact with each other. Therefore, when the shaft (1) and the rotating body (not shown) try to rotate, frictional resistance is generated between the tenon portion (5) and the bearing (6).
  • a rotational load is applied due to this frictional resistance, which in turn causes energy loss due to the frictional resistance.
  • a bearing capable of reducing the frictional resistance generated when a shaft rotates, and a rotating device equipped with the bearing.
  • Another object of the present invention is to provide a rotary device capable of reducing the load (rotational load) caused by frictional resistance during rotation, and thus reducing energy loss.
  • Another object of the present invention is to provide a bearing with less frictional resistance than a ball bearing for radial loads.
  • the thrust bearing and the radial bearing are collectively referred to as the "bearing”, but the single “thrust bearing” or the single “radial bearing” may be simply referred to as the "bearing”.
  • a rotating device that includes a rotating portion that rotates about a rotating shaft and a fixed portion that is relatively fixed with respect to the rotation of the rotating portion.
  • the rotating part has a shaft that rotates about the rotating shaft, and a first permanent magnet that is provided with a bearing that supports the shaft and is provided on at least one end side of the shaft.
  • the first permanent magnet is magnetized on the shaft side and the opposite shaft side.
  • the fixed portion is magnetized such that the side facing the first permanent magnet has the same polarity as the magnetic pole on the opposite side of the first permanent magnet, and magnetic repulsion occurs between the fixed portion and the first permanent magnet. It has a second permanent magnet provided on the rotating shaft so as to be in a non-contact state with the rotating shaft.
  • a shaft configured to rotate about a rotating shaft, and a thrust bearing disposed on at least one end side of the shaft and receiving a load in a thrust direction parallel to the rotating shaft.
  • a rotating device is provided.
  • the thrust bearing has a first surface connected to one end of the shaft and provided with a first magnetic pole, and a second surface opposite to the first surface and provided with a second magnetic pole.
  • a first permanent magnet configured to coaxially rotate together; a third surface facing the second surface of the first permanent magnet and having a second magnetic pole; and a third surface.
  • a second permanent magnet having a fourth face on which the first magnetic pole is located on the opposite side and fixed to a given fixed part.
  • the member is present even at the position of the rotation axis, and the second magnetic pole is arranged so that the lines of magnetic force are concentrated at the position of the rotation axis.
  • the second magnetic pole is arranged so that the member exists even at the position of the rotation axis and the lines of magnetic force are concentrated at the position of the rotation axis.
  • the rotating device of the present invention it is possible to reduce the frictional resistance generated when the shaft rotates. In addition, it is possible to reduce the load (rotational load) caused by the frictional resistance during rotation, thereby reducing the energy loss.
  • a bearing that receives the radial load of a shaft that rotates about its axis of rotation.
  • a bearing comprises a receiving member that receives the radial load of the shaft, a magnet having positive and negative magnetic poles, and a magnetic lubricant containing magnetic particles that are affected by the magnetic lines of force between the positive and negative magnetic poles.
  • a magnetic lubricant is disposed between the shaft and the receiving member.
  • the bearing of the present invention it is possible to reduce the frictional resistance generated when the shaft rotates. According to the present invention, it is possible to provide a bearing with less frictional resistance than a ball bearing.
  • FIG. 7 is a diagram shown for explaining a rotating device 710 according to an application; It is a figure shown in order to demonstrate the rotation apparatus 711 which concerns on an application example.
  • FIG. 7 is a diagram shown for explaining a rotating device 710 according to an application; It is a figure shown in order to demonstrate the rotation apparatus 711 which concerns on an application example.
  • FIG. 11 is a diagram shown for explaining a rotating device 712 according to an application example; It is a figure shown in order to demonstrate the rotation apparatus 720 which concerns on a modification. It is a figure shown in order to demonstrate the rotation apparatus 721 which concerns on a modification.
  • FIG. 9 is a diagram showing an example of a conventional rotating device 900;
  • FIG. 10 is a diagram shown for explaining a bearing 301 according to Embodiment B1;
  • FIG. 10 is a cross-sectional view for explaining actions and effects of the bearing 301 according to Embodiment B1.
  • FIG. 4 is a diagram illustrating how the receiving member 10a made of cast iron and the magnetic lubricant 50 blend together. It is a figure shown in order to demonstrate the bearing 302 which concerns on Embodiment B2.
  • FIG. 7 is a diagram shown for explaining a rotating device 750 according to an application;
  • FIG. 11 is a diagram shown for explaining a rotating device 751 according to an application;
  • FIG. 11 is a diagram shown for explaining a rotating device 752 according to an application;
  • FIG. 11 is a diagram for explaining a rotating device 753 according to an application;
  • FIG. 11 is a diagram shown for explaining a rotating device 754 according to an application;
  • FIG. 1 is a diagram for explaining a rotating device 1 according to Embodiment A1.
  • a rotating device 1 As shown in FIG. 1, a rotating device 1 according to Embodiment A1 includes a "rotating part (reference numerals omitted)" that rotates about a rotation axis RA, and a relatively fixed state with respect to the rotation of the rotating part. It is provided with a fixed part (reference numerals omitted).
  • the rotating portion has a shaft 100 that rotates around a rotation axis RA, and a first permanent magnet 210 that is provided with a bearing portion 217 that supports the shaft 100 and that is provided on at least one end side of the shaft 100 .
  • the first permanent magnet 210 is attached to the shaft side (the side on which the shaft 100 is provided or arranged) and the opposite shaft side (the side opposite to the side on which the shaft 100 is arranged). magnetized.
  • the stationary part has a second permanent magnet 220 .
  • the second permanent magnet 220 is magnetized so that the side facing the first permanent magnet 210 has the same polarity as the magnetic pole on the opposite axis side of the first permanent magnet 210 (in other words, the second permanent magnet 220 constituting the rotating portion).
  • the first permanent magnet 210 and the second permanent magnet 220 constituting the fixed portion are magnetized so that their opposing surfaces have the same polarity), and the first permanent magnet 210 and the first permanent magnet 210 magnetically repel each other. It is provided on the shaft 100 so as to be in non-contact with the first permanent magnet 210 .
  • the "axis-side surface” of the first permanent magnet 210 can be called the "first surface 211", and the “opposite-axis surface” can be called the “second surface 212". can.
  • “the surface on the side facing the first permanent magnet 210" of the second permanent magnet 220 is referred to as “the third surface 221”, and “the surface opposite to the side facing the first permanent magnet 210". This can be rephrased as “fourth surface 222". Furthermore, reverse paraphrasing is also mutually possible.
  • the rotating device 1 when viewed from another point of view, it can be said that it is broadly divided into the shaft 100 and the thrust bearing 200 .
  • the detailed description of each component of the “rotating portion”, the “fixed portion”, the shaft 100 and the thrust bearing 200 will be continued below.
  • the shaft 100 is also called a shaft, and is configured to rotate about the rotation axis RA.
  • a rotating body (not shown) is attached to the shaft 100 .
  • the rotating body rotates integrally with the shaft 100 around the rotation axis RA.
  • the thrust bearing 200 receives a load in the thrust direction TD parallel to the rotation axis RA.
  • a load in the thrust direction TD is also called an axial load.
  • the load is the load due to the shaft 100, the rotating body, and the like.
  • the thrust bearing 200 is arranged on at least one end side 100a of the shaft 100 described above.
  • the thrust bearing 200 comprises a first permanent magnet 210 connected to one end side 100a of the shaft 100, and a second permanent magnet 220 arranged on the opposite side of the first permanent magnet 210 to the side on which the shaft 100 is arranged.
  • the first permanent magnet 210 has a first surface 211 on which a first magnetic pole (the S pole in the example of the drawing; the same applies hereinafter) and a second magnetic pole (the example in the drawing) located on the opposite side of the first surface 211 has a second surface 212 on which an N pole is arranged.
  • the first permanent magnet 210 is configured to rotate integrally with the shaft 100 coaxially with the rotation axis RA of the shaft 100 .
  • the second permanent magnet 220 is positioned to face the second surface 212 of the first permanent magnet 210 and has a third surface 221 on which the second magnetic pole (N pole) is arranged, and a side opposite to the third surface 221. and has a fourth surface 222 on which a first magnetic pole (south pole) is arranged.
  • a second permanent magnet 220 is fixed to a given fixed part.
  • the first permanent magnet 210 and the second permanent magnet 220 are arranged coaxially so that the second surface 212, which is the load-side facing surface 215, and the third surface 221, which is the receiving-side facing surface 225, face each other. They are arranged to constitute one thrust bearing 200 .
  • the first magnetic pole and the second magnetic pole are magnetic poles having polarities opposite to each other.
  • the first magnetic pole is the S pole and the second magnetic pole is the N pole.
  • the first permanent magnet 210 is preferably configured such that the center of the first magnetic pole (S pole) arranged in the first permanent magnet 210 is substantially coaxial with the rotation axis RA.
  • the second permanent magnet 220 is preferably configured such that the center of the first magnetic pole (S pole) arranged in the second permanent magnet 220 is substantially coaxial with the rotation axis RA.
  • the position of the rotation axis RA is not an air gap/space, and the member (the member of the permanent magnet) is present even at the position of the rotation axis RA.
  • the second magnetic pole (N pole) is arranged so that the lines of magnetic force are concentrated at the position of the rotation axis RA.
  • the position of the rotation axis RA is not an air gap/space, and the member (permanent magnet member) exists even at the position of the rotation axis RA,
  • the second magnetic pole (N pole) is arranged so that the lines of magnetic force are concentrated at the position of the rotation axis RA.
  • the second surface 212 and the third surface 221 are surfaces orthogonal to the rotation axis RA, and are circular when viewed along the rotation axis RA.
  • the second surface 212 and the third surface 221 are each flat, have the same area of the opposing surfaces, and are described as surfaces having the same shape, but are not limited to this.
  • the first permanent magnet 210 and the second permanent magnet 220 may be made of different materials or may have different structures.
  • the shaft 100 and the thrust bearing 200 are preferably arranged so that the direction in which the rotating shaft RA extends is substantially the same as the vertical direction.
  • the “vertical direction” refers to a direction parallel to the direction of gravitational acceleration (the direction of gravity g; see FIG. 1).
  • the shaft 100 will move toward the first permanent magnet 210.
  • the second surface 212 of the second permanent magnet 220 and the third surface 221 of the second permanent magnet 220 are spaced apart from each other with a gap GP1 so that the second surface 212 floats vertically upward (in the opposite direction to the direction of gravity g) and rotates. is preferably configured to
  • the second permanent magnet 220 is provided on the rotation axis RA, and the first permanent magnet 210 facing the second permanent magnet 220 is also provided on the rotation axis RA. ing. Therefore, the magnetic lines of force are concentrated at the position of the rotation axis RA, and the repulsive force between the first permanent magnet 210 and the second permanent magnet 220 is maximized near the rotation axis RA. Therefore, the rotating part can be smoothly rotated around the rotation axis RA, which can contribute to the reduction of energy loss.
  • the second surface 212 and the third surface 221 each have the same polarity as the magnetic field lines so that the lines of magnetic force are concentrated at the position of the rotation axis RA.
  • Two magnetic poles are arranged to face each other. Therefore, a magnetic repulsive force (repulsive force) is generated between the second surface 212 and the third surface 221, and the repulsive force causes the first permanent magnet 210 to levitate away from the second permanent magnet 220 with the gap GP1. .
  • the frictional resistance (frictional resistance by the thrust bearing 200) generated when the first permanent magnet 210, the shaft 100, and the rotating body rotate is almost equal to 0, and the load (rotational load) caused by the frictional resistance during rotation can also be reduced. And, as a result, energy loss can be reduced.
  • the rotating device 1 is configured such that the mutual magnetic lines of force are concentrated at the position of the rotation axis RA, the repulsive force between the first permanent magnet 210 and the second permanent magnet 220 becomes maximum near the rotation axis RA. . Therefore, the first permanent magnet 210, the shaft 100, and the rotating body can be smoothly rotated about the rotation axis RA, which contributes to the reduction of energy loss.
  • the shaft 100 and the thrust bearing 200 are arranged such that the direction in which the rotation axis RA extends is substantially the same as the vertical direction, the rotation of the shaft 100 and the rotating body is reduced compared to the case where the shaft 100 and the rotating body are placed horizontally or diagonally. Loss of body rotational energy can be further reduced.
  • FIG. 2 is a diagram for explaining the rotating device 2 according to Embodiment A2.
  • 2(a) is a schematic cross-sectional view corresponding to FIG. 1
  • FIG. 2(b) is an exploded perspective view of the first permanent magnet 210 and the first yoke 230
  • FIG. 2(c). 4] is a perspective view when the second permanent magnet 220 and the second yoke 240 are disassembled.
  • the rotating device 2 according to Embodiment A2 basically has the same configuration as the rotating device 1 according to Embodiment A1, but further includes a first yoke 230 and a second yoke 240. ' is different from the rotating device 1 according to the embodiment A1.
  • a thrust bearing 200′ according to Embodiment A2 includes a first yoke 230 paired with a first permanent magnet 210 to form a magnetic circuit, and a second permanent magnet 220 paired with the first yoke 230 to form a magnetic circuit. and a second yoke 240 forming a magnetic circuit (see FIG. 2(a)).
  • the first yoke 230 and the second yoke 240 are each made of a soft magnetic material.
  • the first yoke 230 is a bottomed cylinder having a cylindrical body portion 232 open on one side and a bottom portion 234 connected to the other side of the cylindrical body portion 232. shaped.
  • the first yoke 230 coaxially accommodates the first permanent magnet 210 inside so as to surround the first surface 211 and the side surface 213 of the first permanent magnet 210 with the bottom portion 234 and the cylindrical body portion 232 .
  • An inner bottom surface 236 of the bottom portion 234 is in contact with the first surface 211 of the first permanent magnet 210 .
  • the space between the inner wall surface 235 of the tubular body 232 and the side surface 213 of the first permanent magnet 210 is filled with an air layer (space) or a non-magnetic material 290 (see also FIG. 1(a)).
  • the first permanent magnet 210 and the shaft 100 are connected in some way.
  • the first permanent magnet 210 is housed in the first yoke 230 and integrated, and the bottom 234 of the first yoke 230 and the one end side of the shaft 100 are connected to be integrally connected as a whole.
  • the rim surface 237 on the opening side of the cylindrical body portion 232 of the first yoke 230 and the second surface 212 of the first permanent magnet 210 form a "load-side facing surface 215" that is substantially the same plane.
  • the second yoke 240 has, as shown in FIG. It has a cylindrical bottom.
  • the second yoke 240 accommodates the second permanent magnet 220 inside so as to surround the fourth surface 222 and the side surface 223 of the second permanent magnet 220 with the bottom portion 244 and the cylindrical body portion 242 .
  • An inner bottom surface 246 of the bottom portion 244 contacts the fourth surface 222 of the second permanent magnet 220 .
  • the space between the inner wall surface 245 of the tubular body 242 and the side surface 223 of the second permanent magnet 220 is filled with an air layer (space) or a non-magnetic material 290 (see also FIG. 1(a)).
  • the second yoke 240 and the second permanent magnet 220 are somehow fixed to a given fixture.
  • the rim surface 247 of the cylindrical body portion 242 of the second yoke 240 and the third surface 221 of the second permanent magnet 220 form a "receiving side facing surface 225" that is substantially the same plane.
  • the set of the first permanent magnet 210 and the first yoke 230 and the set of the second permanent magnet 220 and the second yoke 240 are coaxially arranged such that the load side facing surface 215 and the receiving side facing surface 225 face each other. are arranged to constitute one thrust bearing 200'.
  • the inner bottom surface 236 of the bottom portion 234 contacts the first surface 211 of the first permanent magnet 210, and the inner wall surface 235 of the cylindrical body portion 232 and the first yoke 230 contact each other.
  • a space between the permanent magnet 210 and the side surface 213 is filled with an air layer (space) or a non-magnetic material 290 .
  • the first yoke 230 is magnetically coupled with the first permanent magnet 210 to form part of a magnetic circuit.
  • the magnetic lines of force emitted from the second magnetic pole (N pole) of the second surface 212 of the first permanent magnet 210 toward the gap GP1 reach the edge surface 237 of the first yoke 230.
  • the lines of magnetic force gather in a converging manner, pass through the inside of the first yoke, and reach the first magnetic pole (S pole) on the first surface of the first permanent magnet 210 .
  • the inner bottom surface 246 of the bottom portion 244 is in contact with the fourth surface 222 of the second permanent magnet 220, and the inner wall surface 245 of the cylindrical body portion 242 and the side surface 223 of the second permanent magnet 220 are in contact with each other.
  • the space is filled with an air layer (space) or a non-magnetic material 290 .
  • the second yoke 240 is magnetically coupled with the second permanent magnet 220 to form part of the magnetic circuit.
  • the magnetic lines of force emitted from the second magnetic pole (N pole) of the third surface 221 of the second permanent magnet 220 toward the gap GP1 reach the edge surface 247 of the second yoke 240.
  • the magnetic lines of force converge and gather, passing through the inside of the second yoke and reaching the first magnetic pole (S pole) on the fourth surface of the second permanent magnet 220 .
  • the magnetic lines of force can be passed through the first permanent magnet 210 and the first yoke 230, and the second permanent magnet 220 and the second yoke 240 intensively and at high density.
  • the repulsive force between the receiving side facing surface 225 can be further increased. Therefore, the thrust bearing 200' can cope with a heavy object having a larger mass, and even if the shaft 100 and the rotating body have a larger mass, the rotational load can be reduced, and the energy loss caused by the frictional resistance during rotation can be reduced. can be reduced.
  • the rotating device 2 according to the embodiment A2 has basically the same configuration as the rotating device 1 according to the embodiment A1, except that the first yoke 230 and the second yoke 240 are provided. Therefore, among the effects of the rotating device 1 according to the embodiment A1, the corresponding effects are similarly obtained.
  • FIG. 3 is a diagram for explaining the rotating device 3 according to Embodiment A3.
  • the rotating device 3 according to the embodiment A3 basically has the same configuration as the rotating device 1 according to the embodiment A1 and the rotating device 2 according to the embodiment A2. and the rotating device 2 according to Embodiment A2.
  • the rotating device 3 according to Embodiment A3 further includes a radial bearing 300 that receives a load in the radial direction RD (direction perpendicular to the shaft 100).
  • a ball bearing may be employed as the radial bearing 300, and the ball bearings may be arranged at two locations along the rotation axis RA direction of the shaft 100 so as to receive a load in the radial direction RD.
  • Good see reference numerals 300a and 300b in FIG. 3
  • the radial bearing 300 instead of a ball bearing, a so-called slide bush or linear bush that can cope with both the rotation of the shaft 100 and the axial slide in the radial direction RD may be employed.
  • the radial bearing 300 may be configured such that the magnetic fluid is applied in the radial direction RD.
  • the shaft 100 and the rotating body can be rotated more stably, and energy loss can be further reduced. can do.
  • the rotating device 3 according to the embodiment A3 has basically the same configuration as the rotating device 1 according to the embodiment A1 and the rotating device 2 according to the embodiment A2 except that the radial bearing 300 is provided. Therefore, the rotating device 1 according to the embodiment A1 and the rotating device 2 according to the embodiment A2 have the same effect.
  • FIG. 4 is a diagram shown for explaining the rotating device 4 according to Embodiment A4.
  • the rotating device 4 according to Embodiment A4 basically has the same configuration as each of the rotating devices 1 to 3 according to Embodiments A1 to A3, but is different from Embodiments A1 to A3 in that another thrust bearing 400 is further provided. It is different from each rotating device 1 to 3 according to.
  • the rotating device 4 according to Embodiment A4 has the same configuration as the thrust bearing 200 arranged on the one end side (lower side of the drawing) on the other end side (upper side of the drawing) of the shaft 100 as well.
  • Another thrust bearing 400 is arranged with a At this time, a given rotating body (here, turbine 530 as an example) is configured to be mounted on shaft 100 and arranged between thrust bearing 200 and another thrust bearing 400 .
  • Another thrust bearing 400 basically has the same configuration as the thrust bearing 200, and includes a first permanent magnet 410 connected to the other end side of the shaft 100 and a pair of the first permanent magnet 410.
  • a first yoke 430 forming a magnetic circuit with a second permanent magnet 420 indirectly fixed to a given fixing portion; and a second yoke 440 forming a magnetic circuit in pair with the second permanent magnet 420 and have.
  • a gap GP2 is provided between the first permanent magnet 410 and the second permanent magnet 420 .
  • a given rotating body is attached to the shaft 100 and arranged between the thrust bearing 200 and another thrust bearing 400 . That is, the shaft 100 and the rotating body (turbine 530) are sandwiched between the thrust bearing 200 on one end side of the shaft 100 and another thrust bearing 400 on the other end side, and rotate in a floating state in the thrust direction.
  • the thrust bearing 200 and the other thrust bearing 400 bear the load of the shaft 100 and the rotating body in such a manner that they are pinched from one end side and the other end side by a force directed toward the center due to repulsive force. .
  • the rotating body is the turbine 530
  • the load in the thrust direction fluctuates due to fluctuations in the flow of fluid. It is possible to prevent the body (turbine 530) from wobbling and shifting in the thrust direction. Therefore, stable rotation can be maintained, and energy loss due to shift in the thrust direction can be suppressed.
  • the rotating device 4 according to Embodiment A4 has basically the same configuration as the rotating devices 1 to 3 according to Embodiments A1 to A3 except that another thrust bearing 400 is further provided. Therefore, among the effects of the rotating devices 1 to 3 according to the embodiments A1 to A3, the corresponding effects are similarly obtained.
  • FIG. 5 is a diagram for explaining the rotating device 5 (aspect 1) according to Embodiment A5.
  • FIG. 6 is a diagram for explaining the rotating device 6 (aspect 2) according to Embodiment A5.
  • the rotating devices 5 and 6 according to Embodiment A5 basically have the same configuration as the rotating devices 1 to 4 according to Embodiments A1 to A4, except that a magnetic detection unit 600 is provided. It differs from each rotating device 1 to 4 according to A1 to A4.
  • the rotating devices 5 and 6 are positioned above the receiving side facing surface 225 including the third surface 221 of the second permanent magnet 220 (the third surface 221 of the second permanent magnet 220, the edge surface 247 of the second yoke 240, or the end surface formed by the air layer/non-magnetic material 290 filling the gap), or above the load-side facing surface 215 including the second surface 212 of the first permanent magnet 210 (the second surface of the first permanent magnet 210 212, the edge surface 237 of the first yoke 230, or the end surface formed by the air layer/non-magnetic material 290 filling the gap).
  • any magnetism detector 600 may be employed as long as it can relatively detect the intensity of the magnetic flux density.
  • FIG. 5(a) shows a sectional view of the rotating device 5.
  • FIG. FIG. 5(b) is a graph showing the relationship between the load in the thrust direction TD (horizontal axis) and the magnetic flux density (vertical axis) detected by the magnetic detector 600.
  • FIG. FIG. 5(c) is a diagram schematically showing the state of magnetic lines of force (magnetic flux density) when the load in the thrust direction TD is relatively light, and FIG. It is a figure which shows typically the mode of a magnetic force line (magnetic flux density).
  • the magnetic detection section 600 is arranged on the receiving side facing surface 225 and near the rotation axis RA.
  • the load in the thrust direction TD shown in FIG. 5(c) is relatively light (the gap is GP1)
  • the load in the thrust direction TD shown in FIG. 5(d) is relatively heavy (the gap is GP1').
  • the rotation device 5 detects the change in the magnetic flux density with the magnetism detection unit 600, thereby detecting the displacement of the separation distances GP1 and GP1' between the receiving-side facing surface 225 and the load-side facing surface 215. It is possible to detect the load in the thrust direction TD. Furthermore, it becomes possible to indirectly measure the weight of the load LD.
  • FIG. 6(a) shows a sectional view of the rotating device 6.
  • FIG. FIG. 6(b) is a graph showing the relationship between the load in the thrust direction TD (horizontal axis) and the magnetic flux density (vertical axis) detected by the magnetic detector 600.
  • the magnetic detector 600 is arranged on the receiving side facing surface 225 and near the edge of the second yoke 240 (rim surface 247). .
  • the magnetic flux density increases at the position where the magnetic detector 600 is arranged, contrary to the rotation device 5.
  • FIG. 6(b) >>.
  • the relationship between the change in load and the change in magnetic flux density is different from that in the case of the rotating device 5, but in any case, the rotating device 6 detects the change in the magnetic flux density with the magnetism detecting section 600, thereby detecting the receiving side opposing magnetic flux density.
  • the load in the thrust direction TD can be detected. Furthermore, the weight of the load LD is indirectly measured, and the maximum rotation speed of the shaft 100 is controlled according to the weight. It becomes possible to
  • the rotating devices 5 and 6 according to Embodiment A5 have basically the same configuration as the rotating devices 1 to 4 according to Embodiments A1 to A4, except that the magnetic detector 600 is provided. Therefore, among the effects of the rotating devices 1 to 4 according to the embodiments A1 to A4, the corresponding effects are similarly obtained.
  • FIG. 7 is a diagram for explaining a rotating device 710 according to an application.
  • FIG. 8 is a diagram for explaining a rotating device 711 according to an application.
  • FIG. 9 is a diagram for explaining a rotating device 712 according to an application.
  • the direction of the rotation axis RA can be the same as the direction of gravity g, and a flywheel 510 as a rotating body 500 can be provided on the other end side of the shaft 100 .
  • Each rotating device of the present invention has a very small rotating load and a small energy loss due to frictional resistance during rotation. is.
  • a rotor 520 of an electric device such as a motor can also be applied as the rotating body 500 of the present invention. Even an electric device as a heavy object with a relatively large mass can be levitated and rotated against the gravity g as the rotating device of the present invention, thereby reducing the rotational load and energy loss.
  • Reference numeral 522 denotes a permanent magnet belonging to the rotor 520
  • reference numeral 524 denotes a coil belonging to the stator
  • reference numeral 526 denotes a back yoke.
  • a turbine 530 used for vertical wind power generation can also be applied as the rotating body 500 in the present invention.
  • Even the turbine 530 which is a heavy object with a relatively large mass, can be levitated and rotated against the gravity g as the rotating device of the present invention, thereby reducing the rotational load and energy loss. .
  • Embodiment A4 another thrust bearing 400 is configured such that the surface (outer surface) of the first yoke 430 on the side opposite to the inner bottom surface 236 is connected to the other end of the shaft 100. (See Figure 4).
  • the invention is not limited to this.
  • the rotating device 720 according to the modified example, as shown in FIG. may be configured.
  • the second yoke 940 and the second permanent magnet 920 are fixed to a given fixed portion
  • the first yoke 930 and the first permanent magnet 910 are on the rotating side
  • the second yoke 940 and the second permanent magnet 920 are It is placed on the side opposite to the gravitational force g.
  • Embodiment A2 the configuration in which the inner bottom surface 236 of the first yoke 230 is in contact with the first surface 211 of the first permanent magnet 210 has been described.
  • the present invention is not limited to this. That is, it may be configured to have a small gap between the inner bottom surface 236 and the first surface 211 . Even with such a configuration, since the lines of magnetic force generated with the first magnetic pole of the first permanent magnet 210 as the terminal/start end still pass through the inside of the first yoke 230, the inner bottom surface 236 and the first surface 211 It is possible to obtain the same action and effect as when the two contact with each other. Such configurations are also equivalents of the present invention. In addition, the same is true between the inner bottom surface 246 of the second yoke 240 and the fourth surface 222 of the second permanent magnet 220 .
  • the first magnetic pole is the S pole
  • the second magnetic pole is the N pole.
  • the invention is not limited to this.
  • Each embodiment may be applied with the first magnetic pole as the N pole and the second magnetic pole as the S pole.
  • bearings 301 to 305, etc. in which a magnetic lubricant 50 (such as a magnetic fluid), which will be described later in embodiments B1 to B5, etc., are introduced as a radial bearing 300, and these radial bearings are used as thrust bearings according to the present invention. They can be combined as appropriate.
  • FIG. 13 is a diagram for explaining a bearing 301 (radial bearing) according to Embodiment B1.
  • 13(a) is a cross-sectional view of the bearing 301 cut along a virtual plane including the rotation axis RA
  • FIG. 13(b) is an enlarged view of the area surrounded by the dashed line A in FIG. 13(a).
  • 13(c) is a perspective view of the magnet 30.
  • FIG. 13 shows a state in which the shaft 100 (described later) is not inserted into the bearing 301 (the same applies to FIGS. 16 to 19 described later).
  • Axis 100 The bearing 301 according to the embodiment B1 absorbs a load (radial load) in the radial direction RD of the shaft 100 rotating about the rotation axis RA (in other words, the shaft 100 rotating around the rotation axis RA; see FIG. 14). It is the bearing that receives it.
  • Axle 100 also referred to as a shaft, is configured to rotate about an axis of rotation RA.
  • a rotating body is attached to the shaft 100 . The rotating body rotates together with the shaft 100 around the rotation axis RA.
  • the bearing 301 includes receiving members 10 -1 and 10 -2 (hereinafter sometimes simply referred to as the receiving member 10), a magnet 30, and a magnetic lubricant 50. ing.
  • the receiving member 10 is a member that receives the radial load of the shaft 100 .
  • the receiving member 10 exemplified in Embodiment B1 has an annular shape that is flattened and compressed in the thrust direction TD.
  • Such an annular inner peripheral surface serves as a broadly defined “contact portion 14 ” that contacts the shaft 100 directly or indirectly via the magnetic lubricant 50 .
  • the contact portion 14 serves as a so-called “receiving wall” that temporarily receives the radial load.
  • the receiving member 10 is made of a soft magnetic material and constitutes a part of a magnetic path of magnetic lines of force (a magnetic circuit having the magnet 30 as a magnetomotive force source). It is configured to retain the agent 50 (described later).
  • the receiving member 10 has a base portion 11 and a projecting portion 12 projecting toward the rotation axis RA.
  • the contact portion 14 (receiving wall) described above is provided on the tip side of the projecting portion 12 . As shown in FIG. 13B, the contact portion 14 is formed at the tip of the projecting portion 12 projecting from the position of the inner surface 34 of the magnet 30 toward the rotation axis RA by the reference sign PR.
  • At least the contact portion 14 of the receiving member 10 is made of cast iron.
  • cast iron is used not only for the contact portion 14 but also for the projecting portion 12 and the entire receiving member 10 .
  • Magnet 30 is a magnetomotive force source on the magnetic circuit in the bearing 301, and has a positive magnetic pole 31 (N pole) and a negative magnetic pole 32 (S pole). Magnet 30 is a permanent magnet. However, without being limited to this, the magnet 30 may be composed of an electromagnet.
  • the magnet 30 of embodiment B1 has a thick, substantially cylindrical shape having an inner surface 34, an outer surface 35, an upper surface 36 and a lower surface 37.
  • the magnet 30 of Embodiment B1 is a so-called axially anisotropic magnet, the entire upper surface 36 of which is a positive magnetic pole 31 (N pole), and the entire lower surface 37 of which is a negative magnetic pole 32 (S pole).
  • the arrangement relationship between the upper surface 36/lower surface 37 and the positive magnetic pole 31/negative magnetic pole 32 can be changed as appropriate.
  • the magnet 30 is arranged such that the magnetic axis connecting the pair of positive magnetic poles 31 and negative magnetic poles 32 coincides with the thrust direction TD (in addition to the case where it completely coincides, practically it also includes the case where it roughly coincides). and can be obtained, for example, by axial gap magnetization.
  • the magnet 30 is arranged so as to be sandwiched between two receiving members 10 -1 and 10 -2 arranged so that the ribs 16 of the receiving member 10 face each other.
  • the magnet 30 is arranged outside the rib 16 and restricted from moving inward by the rib 16 .
  • the upper surface 36 of the magnet 30 is in contact with the rib 16 side surface of the receiving member 10-1
  • the lower surface 37 is in contact with the rib 16 side surface of the receiving member 10-2 .
  • a magnetic circuit is composed of the magnet 30 and the receiving members 10 -1 and 10 -2 .
  • the magnetic lines of force emitted from the positive magnetic pole 31 of the magnet 30 are arranged inside the upper receiving member 10-1 , the space where the contact portion 14, the magnetic lubricant 50, and the shaft 100 are arranged, and the lower side.
  • the magnetic lubricant 50 belonging to the receiving member 10-2 and the contact portion 14 are sequentially connected to the inside of the receiving member 10-2 arranged on the lower side, and finally, it is drawn back by the negative magnetic pole 32 of the magnet 30. (see arrow in FIG. 13(a)).
  • the magnetic lines of force emitted or drawn from the contact portion 14 are oriented toward the rotation axis RA and intersect the contact portion 14 (surface of the receiving wall).
  • Case 60 Furthermore, in the bearing 301 of Embodiment B1, a case 60 (non-magnetic member) made of a non-magnetic material is provided on the outermost periphery.
  • the case 60 is arranged at a position in the radial direction RD opposite to the position where the magnetic lubricant 50 is arranged (the side where the shaft 100 is arranged) when viewed from the magnet 30, and 10 are provided so as to be in contact with the outer surfaces (no reference numerals) of .
  • the lines of magnetic force emitted from the positive magnetic pole 31 of the magnet 30 are directed not to the outside but to the inside (where the magnetic lubricant is arranged).
  • the magnetic lubricant 50 can be more strongly restrained in the vicinity of the contact portion 14 .
  • the magnetic lubricant 50 is a fluid material containing magnetic particles 51 that are affected by the lines of magnetic force between the positive magnetic pole 31 and the negative magnetic pole 32 of the magnet 30 .
  • a so-called magnetic fluid is used as the magnetic lubricant 50 .
  • a magnetic fluid is a fluid in which a large number of ferromagnetic fine particles coated with a surfactant are dispersed in a base liquid.
  • a magnetic fluid whose base liquid is a liquid whose main component is oil is used. That is, the magnetic lubricant contains a lubricating oily component.
  • the magnetic lubricant 50 used in the example of Embodiment B1 contains lubricating carbon particles 55 (see FIG. 15B described later).
  • the carbon particles 55 in the magnetic lubricant 50 may be those supplied from the cavities of the receiving member 10a made of cast iron, as described later in detail, or particles made of carbon or the like are mixed in the magnetic lubricant 50 in advance. Anything is fine.
  • the magnetic lubricant 50 is arranged between the shaft 100 and the receiving member 10 (see FIGS. 13 to 15). Since the magnetic lubricant 50 contains magnetic particles that are affected by the lines of magnetic force, when placed between the shaft 100 and the receiving member 10, the magnetic lubricant 50 is restrained by the lines of magnetic force generated through the receiving member, resulting in contact. It stays in place by adhering to portion 14 (the face of the receiving wall).
  • the receiving member 10 is made of a soft magnetic material
  • the magnet 30, the receiving member 10 and the shaft 100 constitute a magnetic circuit
  • the magnetic lubricant 50 is present in the magnetic path of this magnetic circuit. are placed.
  • FIG. 14 is a sectional view for explaining functions and effects of the bearing 301 according to Embodiment B1.
  • FIG. 15 is a diagram showing how the receiving member 10a made of cast iron and the magnetic lubricant 50 blend together.
  • FIG. 15(a) is a cross-sectional view showing the shaft 100 near the receiving member 10-2 and the receiving member 10-2 (10a), and
  • FIG. 15(b) is surrounded by the dashed line B in FIG.
  • FIG. 3 is an enlarged cross-sectional view showing an enlarged region that is cut off;
  • a bearing 301 according to Embodiment B1 includes a receiving member 10 that receives the radial load of a shaft 100, a magnet 30 that has a positive magnetic pole 31 and a negative magnetic pole 32, and a magnetic field affected by the magnetic lines of force between the positive magnetic pole 31 and the negative magnetic pole 32. a magnetic lubricant 50 containing body particles 51 , the magnetic lubricant 50 being arranged between the shaft 100 and the receiving member 10 .
  • magnetic lubricant 50 is arranged between the shaft 100 and the receiving member 10 in this manner, magnetic lubrication is provided between the outer peripheral surface of the shaft 100 and the portion of the receiving member 10 that serves as the wall that receives the radial load.
  • a liquid film an “oil film” when an oily component is contained
  • the agent 50 intervenes, and a state (non-contact state) in which the shaft 100 does not directly contact the receiving member 10 can be created. Since the rigid bodies do not rub against each other, no frictional resistance is generated by them.
  • the shaft 100 is always in contact with the liquid film, but since the material forming the liquid film is the magnetic lubricant 50 with high lubricity, the frictional resistance between the shaft 100 and the magnetic lubricant 50 is extremely small. Therefore, the overall frictional resistance that the shaft 100 receives when the shaft 100 rotates can be made extremely small.
  • the magnetic lubricant contains magnetic particles that are affected by the magnetic lines of force between the positive and negative magnetic poles. constrained above. Therefore, even when the shaft rotates or the load fluctuates, the magnetic lubricant remains at a predetermined location between the shaft and the receiving member, and the magnetic lubricant does not decrease due to leakage or scattering. It is possible to continuously and stably interpose the above-described liquid film at a predetermined location.
  • a radial load can be received without providing a ball bearing or the like.
  • friction loss or loss due to heat generation
  • the loss of energy inherent in the shaft 100 and the rotating device associated with the shaft 100 can be greatly reduced.
  • the bearing 301 according to Embodiment B1 has a simple mechanical structure and is excellent in wear resistance and durability because the radial load is received by the liquid film (oil film). Furthermore, since the bearing 301 has a simple mechanical structure, it can be constructed at a low cost, and an economically advantageous bearing can be obtained.
  • the receiving member 10 has a contact portion 14 (receiving wall) that contacts the shaft 100 directly or indirectly via the magnetic lubricant 50, and the contact portion 14 is formed at the tip of the protruding portion 12 that protrudes closer to the rotation axis RA than the position of the inner side surface 34 of the magnet 30 .
  • the inner side surface 34 of the magnet 30 is arranged outside the contact portion 14 of the receiving member 10 (at a position farther from the rotation axis RA).
  • the magnetic lubricant 50 of Embodiment B1 contains lubricating carbon particles 55 . This point will be described below with reference to FIG. Carbon particles such as carbon are generally said to have self-lubricating properties. It is also exhibited in the magnetic lubricant 50, and the magnetic lubricant 50 becomes more slippery.
  • cast iron is said to have a higher carbon content than general steel.
  • a receiving member 10a made of cast iron is adopted as the receiving member 10, and at least the contact portion 14a such as the base portion 11a and the projecting portion 12a is also made of cast iron.
  • the magnetic lubricant 50 enters into many cavities 18a present in the cast iron, and the contact area between the magnetic lubricant 50 and the cast iron receiving member 10a (contact portion 14a) increases, making it easier for them to get along with each other.
  • the rotation of the shaft 100 causes the magnetic lubricant 50 to convect appropriately, so that the carbon particles 55 contained in the cast iron are likely to be mixed into the magnetic lubricant 50 .
  • the cast iron cavities 18 a contain a large amount of carbon particles 55 , the carbon particles 55 are even more likely to mix into the magnetic lubricant 50 .
  • the carbon particles 55 are mixed in the magnetic lubricant 50, the lubricating properties of the carbon particles 55 themselves are exhibited in the magnetic lubricant 50, and the magnetic lubricant 50 becomes more slippery. Therefore, with the configuration as described above, the frictional resistance of the bearing 301 is further reduced.
  • FIG. 16 is a diagram shown for explaining the bearing 302 according to Embodiment B2.
  • FIG. 16(a) is a sectional view of the bearing 302
  • FIG. 16(b) is a perspective view of the magnets 30-1 and 30-2 .
  • the bearing 302 according to the embodiment B2 basically has the same configuration as the bearing 301 according to the embodiment B1. is different from the bearing 301 according to
  • a bearing 302 according to Embodiment B2 includes two substantially cylindrical axially anisotropic magnets 30 . Both magnets 30 -1 and 30 -2 are rotated so that the surfaces in the thrust direction TD (upper surface 36 or lower surface 37) face each other with magnetic poles of the same polarity (the positive magnetic pole 31 or N pole in the example shown). arranged along the axis RA.
  • the receiving member 10 -2 in contact with the magnet 30 -1 placed above and the receiving member 10 -2 in contact with the magnet 30 -2 placed below are shared by the magnets 30 -1 and 30 -2 . It is common. Further, the case 60 (non-magnetic member) made of non-magnetic material is also used in common at positions corresponding to both magnets.
  • the receiving member 10-2 serves as a common magnetic path in which magnetic lines of force emitted/drawn from both magnets 30-1 and 30-2 join. is omitted), the magnetic lubricant 50 can be bound more strongly. Therefore, the bearing 302 according to Embodiment B2 is a more robust bearing that is resistant to increases and fluctuations in radial load.
  • the bearing 302 according to Embodiment B2 has more contact portions 14 than Embodiment B1 (three locations for the receiving members 10 ⁇ 1 , 10 ⁇ 2 , and 10 ⁇ 3 ), and the shaft 100 has a long section. Since it can receive a radial load at , it can contribute to rotation with less shake.
  • the bearing 302 according to Embodiment B2 has basically the same configuration as the bearing 301 according to Embodiment B1, except for the fact that it has a plurality of magnets. Therefore, among the effects of the bearing 301 according to the embodiment B1, the corresponding effects are similarly obtained.
  • FIG. 17 is a diagram for explaining the bearing 303 according to Embodiment B3.
  • 17(a) is a cross-sectional view of the bearing 303 ⁇ cross-sectional view taken along line DD of FIG. 17(b)>>, and
  • FIG. 2 is a plan view of the time (the receiving member 10-1 is not drawn).
  • a bearing 303 according to Embodiment B3 basically has the same configuration as the bearing 301 according to Embodiment B1, but differs from the bearing 301 according to Embodiment B1 in the magnet configuration.
  • the magnet 30a of the embodiment B3 has a magnetic axis that connects a pair of positive magnetic poles 31 -n and negative magnetic poles 32 -n (where n is a natural number and contains an index number; the same applies hereinafter). It has a plurality of axially anisotropic poles configured to coincide with the thrust direction TD. That is, the magnet 30a includes at least two poles MPn defined by a pair of positive magnetic poles 31 -n and negative magnetic poles 32 -n .
  • the magnet 30a illustrated in FIG. 17 includes eight poles MP1 to MP8 obtained by equally dividing 360 degrees around the rotation axis RA into eight.
  • the poles MP(n) and MP(n+1) adjacent to each other are arranged with the same magnetic poles (positive magnetic pole/negative magnetic pole) with respect to the surface (upper surface or lower surface) in contact with the same receiving member 10.
  • a non-magnetic material member 75 partitions between the MPs.
  • the magnet 30a of embodiment B3 can be manufactured by axial gap magnetization. Moreover, since the magnet 30a can be prepared as an assembly of divided magnets corresponding to the respective poles MP1 to MP8, it can be said that the bearing is excellent in manufacturability when constructing a bearing having a large diameter.
  • the bearing 303 according to Embodiment B3 has basically the same configuration as the bearing 301 according to Embodiment B1 except for the magnet configuration. Therefore, among the effects of the bearing 301 according to the embodiment B1, the corresponding effects are similarly obtained.
  • FIG. 18 is a diagram for explaining the bearing 304 according to Embodiment B4.
  • 18(a) is a cross-sectional view of the bearing 304 ⁇ cross-sectional view taken along line FF of FIG. 18(b)>>, and
  • FIG. 2 is a plan view of the time (the receiving member 10-1 is not drawn).
  • the bearing 304 according to the embodiment B4 basically has the same configuration as the bearing 303 according to the embodiment B3. It is different from the bearing 303 according to
  • a bearing 304 according to Embodiment B4 includes two axially anisotropic multipolar magnets 30a described in Embodiment B3. Both magnets 30a -1 and 30a -2 are arranged such that magnetic poles of the same polarity face each other within the same section SCn. Looking at FIG. 18(a), both negative magnetic poles (S poles) face each other in the left section SC1, and both negative magnetic poles (S poles) face each other in the right section SC5 so as to sandwich the receiving member 10-2 . It is arranged in such a way that
  • the receiving member 10 -2 in contact with the upper magnet 30a -1 and the receiving member 10-2 in contact with the lower magnet 30a -2 are shared by the magnets 30a -1 and 30a -2 . It is common. Further, the case 60 (non-magnetic member) made of non-magnetic material is also used in common at positions corresponding to both magnets.
  • the inner diameter of the upper magnet 30a -1 is larger than the inner diameter of the lower magnet 30a -2 .
  • the inner diameter of the upper receiving member 10-1 is larger than the inner diameter of the lower receiving member 10-3 .
  • a counterbore hole 15 opening upward is provided in the vicinity of the projecting portion 12 of the middle receiving member 10-2 . Since the bearing 304 according to the embodiment B4 has such a configuration, it bears a stepped shaft having a thin outer diameter and a thick outer diameter depending on the position in the longitudinal direction, as indicated by reference numeral 110. can also
  • the bearing 304 according to Embodiment B4 has basically the same configuration as the bearing 303 according to Embodiment B3, except for the fact that it has a plurality of magnets 30a. Therefore, among the effects of the bearing 303 according to the embodiment B3, the corresponding effects are similarly obtained.
  • FIG. 19 is a diagram shown for explaining the bearing 305 according to Embodiment B5.
  • FIG. 19(a) is a cross-sectional view of the bearing 305 cut along a virtual plane including the rotation axis RA
  • FIG. 19(b) is an enlarged view of the area surrounded by the dashed line G in FIG. 19(a). It is an enlarged sectional view
  • FIG.19(c) is a perspective view of the magnet 30b.
  • a bearing 305 according to Embodiment B5 basically has the same configuration as the bearing 301 according to Embodiment B1, but differs from the bearing 301 according to Embodiment B1 in the magnet configuration.
  • the magnet 30b of embodiment B5 is a radially anisotropic magnet configured such that the magnetic axis connecting the pair of positive magnetic poles 31 and negative magnetic poles 32 coincides with the radial direction RD.
  • the magnet 30b can be manufactured with radial gap magnetization.
  • the upper receiving member 10b (identical reference numeral) having the upper contact portion 14-1 and the lower receiving member 10b (identical reference numeral) having the lower contact portion 14-2 ) are continuously configured (combined) through the transition portion 17 . Therefore, the crossover portion 17 also constitutes a part of the magnetic path (see the arrows indicating the lines of magnetic force in FIG. 20(a)).
  • the bearing 305 the position where the magnet 30b is arranged and the position in the thrust direction TD where the magnetic lubricant 50 is arranged along the direction parallel to the magnetic axis (the direction perpendicular to the rotation axis RA).
  • a spacer 70 non-magnetic member made of a non-magnetic material is provided between them.
  • the bearing 305 according to Embodiment B5 has basically the same configuration as the bearing 301 according to Embodiment B1 except for the magnet configuration. Therefore, among the effects of the bearing 301 according to the embodiment B1, the corresponding effects are similarly obtained.
  • FIG. 20 is a diagram shown for explaining a rotating device 750 according to an application.
  • FIG. 21 is a diagram for explaining a rotating device 751 according to an application.
  • FIG. 22 is a diagram for explaining a rotating device 752 according to an application.
  • FIG. 23 is a diagram for explaining a rotating device 753 according to an application.
  • FIG. 24 is a diagram for explaining a rotating device 754 according to an application.
  • the bearing according to each embodiment can be applied appropriately.
  • 303, 305 may be arranged to receive a radial load.
  • a rotating device 751 shown in FIG. 301, 302, 303, 305 may be arranged.
  • Each bearing of the present invention has a very small coefficient of friction and a small energy loss due to frictional resistance, so it is suitable for application to a device that retains energy by the flywheels 510, 510'.
  • the bearing according to each embodiment can also be applied to a rotating device in which the rotor 520 of the vertical power generator is connected to the shaft 100, like the rotating device 752 shown in FIG.
  • Reference numeral 522 denotes a permanent magnet belonging to the rotor 520
  • reference numeral 524 denotes a coil belonging to the stator
  • reference numeral 526 denotes a coil back yoke.
  • the bearing 304 according to the embodiment B4 which is compatible with a stepped shaft, is arranged, and at other positions, the bearings 301, 302, 303 according to any one of the embodiments B1, B2, B3, B5 are arranged.
  • , 305 can be arranged.
  • the bearing (radial bearing) according to the present invention can be applied not only to a power generator but also as a bearing that receives the radial load of the main shaft of a motor.
  • the bearing according to each embodiment can also be applied to a rotating device using a vertical wind turbine blade 530 and a non-contact thrust bearing 200, like a rotating device 753 shown in FIG. .
  • the non-contact thrust bearing 200 includes a first permanent magnet 210 and a second permanent magnet 220 which are magnetized so that the surfaces facing each other have the same polarity and are arranged on the rotation axis RA.
  • one end of the shaft 100 is connected to the first permanent magnet 210 and the second permanent magnet 210, so that the first permanent magnet 210 and the second permanent magnet are configured to be in a non-contact state while keeping an appropriate gap therebetween by magnetic repulsion.
  • the bearings 301, 302, 303, and 305 of any one of the embodiments B1, B2, B3, and B5 may be arranged so as to support the side surface of the shaft 100. .
  • the bearing according to each embodiment can also be applied to a rotating device, such as a rotating device 754 shown in FIG. It is possible.
  • the configuration of the upper thrust bearing 400 is basically the same as that of the lower thrust bearing 200 .
  • the bearings 301, 302, 303, and 305 of any one of the embodiments B1, B2, B3, and B5 may be arranged so as to support the side surface of the shaft 100. .
  • a rotating device 753, 754 having a vane 530 (which can be translated as a turbine 530) provided with radial load bearings 301, 302, 303, 305 and non-contact thrust bearings 200, 400 as shown here:
  • the non-contact thrust bearings 200, 400 are disclosed in detail in Japanese Patent Application No. 2021-140044, which is a prior application invented by the inventors. In the present application, the contents of the prior application are incorporated as they are.
  • the rotating device 753 of FIG. 23 in this application corresponds to the application example (3) of the prior application, and the rotating device 754 of FIG. 24 corresponds to Embodiment 4 of the prior application, and the same reference numerals are used. . Therefore, the detailed description of the thrust bearings 200 and 400 of this application example can be applied to this application example by citing the contents of the prior application as they are.
  • Embodiment B5 An embodiment using a radially anisotropic magnet as the magnet has been described in Embodiment B5.
  • the magnet 30b used in the bearing 305 according to Embodiment B5 has one pole defined by a pair of the positive magnetic pole 31 and the negative magnetic pole 32.
  • the radial anisotropic magnet can also be configured so that the poles defined by the pair of the positive magnetic pole 31 and the negative magnetic pole 32 are multipolar, as in the contents of Embodiments B3 and B4. .
  • the magnet is a radially anisotropic magnet configured so that the magnetic axis connecting the pair of positive magnetic poles 31 and negative magnetic poles 32 is aligned with the radial direction. At least two poles MP defined by the negative magnetic pole 32 are included.
  • the magnetic lubricant 50 may contain a water-soluble liquid. By doing so, the viscosity of the magnetic lubricant as a whole can be easily lowered, so an improvement in lubricity can be expected.
  • each embodiment has been described on the assumption that at least the contact portion 14 is made of cast iron.
  • the invention is not limited to this.
  • carbon steel may be used for the contact portion 14 (at least the contact portion may be made of carbon steel).
  • a magnetic material containing ceramic may be used for the contact portion 14 .
  • the contact portion 14 may be made of a mixture of iron powder and ceramic particles.
  • Embodiment A1 It is possible to further increase the repulsive force in ⁇ A5, or further increase the retention amount of the magnetic lubricant 50 in Embodiments B1 to B5.
  • Cylindrical body 234 Bottom 235 Inner wall 236, 936 Inner bottom 237 Rim surface 240, 440, 940 Second yoke 242 Cylindrical body 244 Bottom 245 Inner wall surface 246 Inner bottom surface 247 Mouth surface 290 Air layer or nonmagnetic material 300, 301, 302, 303, 304, 305 (radial) bearing 500 Rotating body 501, 502, 503 , 504, 510, 510′ flywheel 520 rotor 522 permanent magnet belonging to rotor 524 coil belonging to stator 526 coil back yoke 530 vane (turbine) 600 magnetism detector

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PCT/JP2022/032081 2021-08-30 2022-08-25 軸受及び回転装置 WO2023032812A1 (ja)

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JPS60143925U (ja) * 1984-03-02 1985-09-24 セイコー精機株式会社 回転軸支持装置
JPH01229819A (ja) * 1988-03-04 1989-09-13 Mitsui Eng & Shipbuild Co Ltd 磁性微粒子を包含した炭素体の製造方法
JPH01163213U (enrdf_load_stackoverflow) * 1988-05-06 1989-11-14
JPH046667A (ja) * 1990-04-25 1992-01-10 Hitachi Ltd 回転装置及びモータあるいはその軸受構成体
JPH04119220A (ja) * 1990-09-05 1992-04-20 Ibiden Co Ltd 動圧軸受け
JPH07317765A (ja) * 1994-05-27 1995-12-08 Sankyo Seiki Mfg Co Ltd 流体軸受装置
JP2005532516A (ja) * 2002-07-10 2005-10-27 ターボコー インク． 永久磁石を用いた、回転子軸受システム用のスラスト荷重緩和装置

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JPS49128950U (enrdf_load_stackoverflow) * 1973-03-07 1974-11-06
JPS56113825A (en) * 1980-02-07 1981-09-08 Nippon Telegr & Teleph Corp <Ntt> Magnetic bearing
JPS58131426A (ja) * 1982-01-29 1983-08-05 Tohoku Metal Ind Ltd 磁気軸受装置
JPS60143925U (ja) * 1984-03-02 1985-09-24 セイコー精機株式会社 回転軸支持装置
JPH01229819A (ja) * 1988-03-04 1989-09-13 Mitsui Eng & Shipbuild Co Ltd 磁性微粒子を包含した炭素体の製造方法
JPH01163213U (enrdf_load_stackoverflow) * 1988-05-06 1989-11-14
JPH046667A (ja) * 1990-04-25 1992-01-10 Hitachi Ltd 回転装置及びモータあるいはその軸受構成体
JPH04119220A (ja) * 1990-09-05 1992-04-20 Ibiden Co Ltd 動圧軸受け
JPH07317765A (ja) * 1994-05-27 1995-12-08 Sankyo Seiki Mfg Co Ltd 流体軸受装置
JP2005532516A (ja) * 2002-07-10 2005-10-27 ターボコー インク． 永久磁石を用いた、回転子軸受システム用のスラスト荷重緩和装置

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