WO2019172328A1 - Dispositif d'amortissement de vibrations de roulements - Google Patents

Dispositif d'amortissement de vibrations de roulements Download PDF

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Publication number
WO2019172328A1
WO2019172328A1 PCT/JP2019/008919 JP2019008919W WO2019172328A1 WO 2019172328 A1 WO2019172328 A1 WO 2019172328A1 JP 2019008919 W JP2019008919 W JP 2019008919W WO 2019172328 A1 WO2019172328 A1 WO 2019172328A1
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WO
WIPO (PCT)
Prior art keywords
spherical particles
vibration damping
bearing
damping device
housing
Prior art date
Application number
PCT/JP2019/008919
Other languages
English (en)
Japanese (ja)
Inventor
智也 中村
奈央 林
聡 川崎
満 島垣
Original Assignee
Ntn株式会社
国立研究開発法人宇宙航空研究開発機構
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Publication date
Application filed by Ntn株式会社, 国立研究開発法人宇宙航空研究開発機構 filed Critical Ntn株式会社
Publication of WO2019172328A1 publication Critical patent/WO2019172328A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • 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
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/06—Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/01—Vibration-dampers; Shock-absorbers using friction between loose particles, e.g. sand
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/02—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together
    • F16F7/04—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together in the direction of the axis of rotation
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces

Definitions

  • the present invention relates to a vibration damping device for a bearing that suppresses vibrations of a bearing that supports a high-speed rotating shaft such as a rocket engine turbo pump.
  • shaft vibration such as forced vibration and self-excited vibration at dangerous speeds is often a problem.
  • Jet engines and the like employ a squeeze film damper that obtains a vibration damping effect using the viscosity of a lubricating oil as a vibration damping device for a rotating shaft.
  • a vibration damping device for a high-speed rotation shaft such as a rocket engine turbo pump
  • a ring-shaped wire mesh is disposed between the rotation shaft and the equipment housing, and the force generated by the vibration of the rotation shaft
  • a vibration damping device called a wire mesh damper which deforms a ring-shaped wire mesh and dissipates vibration energy by friction generated between the wires to attenuate the vibration of the rotating shaft, was introduced in Patent Document 1. ing.
  • Non-Patent Document 1 introduces the use of spherical particles as a damper element as a vibration damping device for devices operating at extremely low temperatures and oil-free devices, similar to wire mesh dampers.
  • the vibration damping device using spherical particles as a damper element introduced in Non-Patent Document 1 generally has the following structure shown in FIG.
  • a vibration damping device 21 using spherical particles 20 as a damper element shown in FIG. 5 includes a device housing 24 of a rotating machine arranged on the outer surface of a bearing 23 that supports a rotating shaft 22 in the rotating machine, and the device.
  • An inner cylinder 25 that is disposed between the inner peripheral surface of the housing 24 and the outer surface of the bearing 23 and can be displaced in the radial direction with respect to the device housing 24, and the outer peripheral surface of the inner tube 25 and the inner periphery of the device housing 24
  • a storage space 26 provided between the surface and filled with the spherical particles 20 that generate a damping action by vibration friction, and the storage space 26 disposed at the end in the axial direction of the storage space 26 is filled.
  • a preload ring 27 for applying a preload in the axial direction to the spherical particles 20.
  • the vibration damping device 21 using the spherical particles 20 as a damper element, when radial axial vibration is generated on the rotary shaft 22 of the rotary machine, a radial displacement is generated in the inner cylinder 25 via the bearing 23, and the displacement is caused by the displacement.
  • the spherical particles 20 in the housing space 26 flow, and this flow causes friction between the spherical particles 20, between the spherical particles 20 and the inner cylinder 25, and between the spherical particles 20 and the equipment housing 24. Vibration energy is dissipated by this, and it acts as a damper.
  • the parameters that are considered to affect the characteristics include the particle diameter of the spherical particle 20, the outer diameter of the inner cylinder 25, the inner diameter of the device housing 24, the length of the accommodating space 26, and the preload.
  • the preload by the ring 27, the particle material of the spherical particles 20, the coefficient of friction between the spherical particles 20, and the equipment (controlled by the surface material), these can be industrially controlled and compared to the wire mesh damper Therefore, improvement of quality stability can be expected.
  • the vibration damping device 21 using the spherical particles 20 as a damper element when used in a cryogenic environment, the friction surface is prevented from sticking due to freezing of water existing in the storage space 26 filled with the spherical particles 20. Without this, a sufficient damper function cannot be maintained.
  • the present invention can be used even in a cryogenic environment by preventing wear powder from flowing out of the storage space filled with spherical particles to the outside, and preventing freezing of moisture in the storage space. It is an object of the present invention to obtain a vibration damping device using a spherical particle as a damper element.
  • the present invention provides a device housing disposed at an interval on an outer surface of a bearing that supports a rotating shaft in a rotating machine, an inner peripheral surface of the device housing, and an outer surface of the bearing.
  • An inner cylinder that is disposed with a gap therebetween and is radially displaceable with respect to the device housing, and vibration friction that is provided between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the device housing.
  • the wear particles of the spherical particles are removed from gaps provided between the inner peripheral surface of the device housing and the outer peripheral surface of the inner cylinder on both sides in the axial direction of the storage space filled with the spherical particles. Dust resistant to prevent outflow Characterized in that a Lumpur.
  • an air vent channel that connects the inside of the housing space and the external environment is provided in the device housing.
  • air vent channel air inside the accommodation space is discharged to the outside environment, and cryogenic gas or cryogenic liquid flows into the accommodation space from the outside environment.
  • air can be replaced with a cryogenic gas or a cryogenic liquid, and the movement between particles is prevented from being suppressed due to the solidification of moisture contained in the air present in the storage space. Attenuation characteristics can be obtained by generating particle movement even in a low temperature environment.
  • the material forming the dust-proof filter is preferably a nonwoven fabric made of meta-type wholly aromatic polyamide or polytetrafluoroethylene (PTFE).
  • the non-woven fabric can prevent the wear particles of the spherical particles from flowing out, and the air inside the housing space is released to the external environment while the dust-proof filter is installed in the air vent flow path.
  • the cryogenic gas or the cryogenic liquid can flow into the housing space.
  • the material forming the dust-proof filter can be a porous sintered metal using austenitic stainless steel such as SUS304 or SUS316.
  • austenitic stainless steel such as SUS304 or SUS316.
  • the shape and size of the mesh can be selected in accordance with the shape of the foreign material by austenitic stainless steel.
  • the spherical particles may be made of SUS440C or Si3N4, and may be of the same size or a combination of different sizes.
  • the space between the outer peripheral surface of the inner cylinder that forms the accommodating space filled with the spherical particles that generate the damping action by vibration friction and the inner peripheral surface of the equipment housing is filled by installing dust-proof seals on both sides in the axial direction of the storage space for filling the spherical particles. It is possible to prevent the wear powder generated by the friction of the spherical particles from leaking to the outside environment.
  • both ends of the housing space in the axial direction are sealed with a dust-proof seal as described above, air can not be ventilated between the spherical particles filled in the housing space, so that the interior of the housing space is connected to the external environment.
  • the air vent flow path in the equipment housing, in the case of equipment used at cryogenic temperatures, use the air vent flow path to move the air in the housing space to hydrogen gas or Since it can be replaced with oxygen gas, it is possible to prevent the moisture contained in the air in the storage space filled with the spherical particles from freezing.
  • FIG. 1 It is a schematic sectional drawing which shows embodiment of the vibration damping device which used the spherical particle which concerns on this invention as the damper element. It is an enlarged view of the accommodation space part with which the spherical particle
  • the rotary shaft 2 in the rotary machine of this embodiment is rotatably supported on the inner peripheral surface of a cylindrical device housing 3 via an inner cylinder 4 and a bearing 5.
  • a rolling bearing including an inner ring 5a, an outer ring 5b, and a rolling element 5c accommodated between the inner ring 5a and the outer ring 5b is used.
  • a storage space 7 for storing spherical particles 6 that are damper elements is provided.
  • nickel alloy As a material for forming the device housing 3 and the inner cylinder 4, nickel alloy, SUS304, SUS304L, SUS316, SUS16L, SUS316LN, or the like can be used.
  • the inner cylinder 4 At one end in the axial direction of the inner cylinder 4, the inner cylinder 4 is supported so as to be displaceable in the radial direction with respect to the equipment housing 3, and the inner cylinder is supported elastically so as to match the axis of the equipment housing 3.
  • the springs 8 are provided at equal intervals in the circumferential direction.
  • the inner cylinder supporting spring 8 includes a protruding piece 8a extending outward in the axial direction of the device housing 3, and a radially outer diameter side from the outer end of the protruding piece 8a.
  • the bent piece 8b is formed into a U-shape composed of a bent piece 8b and a folded piece 8c folded in the axial direction from the outer diameter end of the bent piece 8b. Is engaged.
  • An inward flange 3 a that forms one end surface of the accommodation space 7 is formed at one end of the inner peripheral surface of the device housing 3. Between the inner peripheral surface of the inward flange 3 a and the outer peripheral surface of the inner cylinder 4. Is provided with a gap a that allows the inner cylinder 4 to be displaced in the radial direction.
  • the gap a is set to a size that prevents the spherical particles 6 that are damper elements from leaking out.
  • a fixing flange 3b protruding toward the outer diameter in the radial direction is formed on the outer peripheral surface opposite to the outer peripheral surface of the device housing 3 with which the inner cylinder supporting spring 8 is engaged.
  • a ring plate 9 forming the other end face of the accommodation space 7 is fixed by a bolt 10.
  • a pair of fixing rings 11a and 11b that do not move in the axial direction are disposed at both ends of the housing space 7 in the axial direction.
  • a gap b that enables displacement of the inner cylinder 4 in the radial direction, and this gap b is a damper element. Is set to a size that prevents the spherical particles 6 from leaking out.
  • a preloading ring 13b is provided on the housing space 7 side of one of the pair of fixing rings 11a and 11b via a preloading spring 13a so as to be movable in the axial direction.
  • a gap c that allows the inner cylinder 4 to be displaced in the radial direction.
  • the gap c is a spherical particle that is a damper element. 6 is set to a size that does not leak.
  • the storage space 7 is filled with spherical particles 6.
  • spherical particle 6 for example, a steel ball (SUS440C) or a ceramic ball (Si3N4) having a particle diameter of about 1 mm can be used.
  • the spherical particles 6 may all be the same size or may be a combination of different sizes.
  • the dust-proof seals 12a and 12b have low rigidity so that the radial displacement of the inner cylinder 4 is not hindered, and have an initial interference that does not cause a gap even if the radial displacement of the inner cylinder 4 occurs. doing.
  • the rocket engine turbo pump is a rotary machine that pumps a propellant to the combustor, and mainly uses liquid oxygen and liquid hydrogen as the propellant, so that the vicinity of the bearing 5 of the rotating shaft 2 is in a cryogenic environment. .
  • the air in the accommodation space 7 is prevented from freezing before the water is contained in the accommodation space 7 filled with the spherical particles 6 before the cryogenic environment.
  • a propellant gas for example, hydrogen gas or oxygen gas
  • an air vent channel 14 that connects the inside of the housing space 7 and the external environment is provided between the device housing 3 and the ring plate 9.
  • a dust-proof filter 15 is installed at the outlet of the air vent channel 14.
  • the exciting force causes the inner cylinder 4 to change in the radial direction through the bearing 5 as shown by the arrow X2. Due to the fluctuation of the inner cylinder 4, the spherical particles 6 filled in the accommodation space 7 between the inner cylinder 4 and the device housing 3 flow, and the spherical particles 6, the spherical particles 6 and the inner cylinder 4, and the spherical particles 6. And the device housing 3, friction is generated, and the frictional energy is dissipated by the friction to attenuate the vibration.
  • Vibration damping device 2 Rotating shaft 3: Equipment housing 4: Inner cylinder 5: Bearing 6: Spherical particle 7: Accommodating space 8: Spring for supporting inner cylinder 9: Ring plate 10: Bolts 11a and 11b: Fixed ring 12a, 12b: Dust resistant seal 13a: Preload spring 13b: Preload ring 14: Air vent flow path 15: Dust resistant filter

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Support Of The Bearing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Gasket Seals (AREA)
  • Vibration Dampers (AREA)

Abstract

La présente invention traite le problème consistant à empêcher un écoulement externe de poudre usée à partir d'un espace de logement rempli de particules sphériques dans un dispositif d'amortissement de vibrations utilisant les particules sphériques en tant qu'élément amortisseur. Ce dispositif d'amortissement de vibrations de roulements est caractérisé par: un cylindre intérieur (4) qui peut être déplacé dans une direction radiale par rapport à un boîtier (3) d'appareil; et des joints (12a)(12b) anti-poussière de poudre qui, afin d'empêcher un écoulement de poudre usée à partir d'un espace (7) de logement aménagé entre une surface périphérique extérieure du cylindre intérieur (4) et une surface périphérique intérieure du boîtier (3) d'appareil et rempli de particules sphériques (6) servant à produire une action antivibratoire en utilisant un frottement vibratoire, sont disposés des deux côtés dans une direction axiale de l'espace (7) de logement rempli des particules sphériques (6).
PCT/JP2019/008919 2018-03-07 2019-03-06 Dispositif d'amortissement de vibrations de roulements WO2019172328A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018040475A JP2019157869A (ja) 2018-03-07 2018-03-07 軸受の振動減衰装置
JP2018-040475 2018-03-07

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WO2019172328A1 true WO2019172328A1 (fr) 2019-09-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113818584A (zh) * 2021-10-22 2021-12-21 同济大学 一种基于颗粒阻尼的装配式消能伸臂结构
CN114439769A (zh) * 2022-03-09 2022-05-06 合肥通用机械研究院有限公司 一种风机用的高阻尼减振底座
CN115143218A (zh) * 2022-06-30 2022-10-04 重庆大学 磁流变调谐颗粒质量阻尼器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0341211A (ja) * 1989-07-07 1991-02-21 Ishikawajima Harima Heavy Ind Co Ltd 回転体の軸受支持装置
JP2005098410A (ja) * 2003-09-25 2005-04-14 Toyota Motor Corp 軸受潤滑構造
DE102008040508A1 (de) * 2008-07-17 2010-01-21 Zf Lenksysteme Gmbh Vorrichtung zum Andrücken einer Zahnstange

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0341211A (ja) * 1989-07-07 1991-02-21 Ishikawajima Harima Heavy Ind Co Ltd 回転体の軸受支持装置
JP2005098410A (ja) * 2003-09-25 2005-04-14 Toyota Motor Corp 軸受潤滑構造
DE102008040508A1 (de) * 2008-07-17 2010-01-21 Zf Lenksysteme Gmbh Vorrichtung zum Andrücken einer Zahnstange

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113818584A (zh) * 2021-10-22 2021-12-21 同济大学 一种基于颗粒阻尼的装配式消能伸臂结构
CN113818584B (zh) * 2021-10-22 2022-08-16 同济大学 一种基于颗粒阻尼的装配式消能伸臂结构
CN114439769A (zh) * 2022-03-09 2022-05-06 合肥通用机械研究院有限公司 一种风机用的高阻尼减振底座
CN115143218A (zh) * 2022-06-30 2022-10-04 重庆大学 磁流变调谐颗粒质量阻尼器

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