WO2015192848A1 - Pendule centrifuge - Google Patents

Pendule centrifuge Download PDF

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Publication number
WO2015192848A1
WO2015192848A1 PCT/DE2015/200382 DE2015200382W WO2015192848A1 WO 2015192848 A1 WO2015192848 A1 WO 2015192848A1 DE 2015200382 W DE2015200382 W DE 2015200382W WO 2015192848 A1 WO2015192848 A1 WO 2015192848A1
Authority
WO
WIPO (PCT)
Prior art keywords
pendulum
contact point
roller
roller contact
mass
Prior art date
Application number
PCT/DE2015/200382
Other languages
German (de)
English (en)
Inventor
Hartmut Mende
Dieter EIREINER
Uwe Grahl
Original Assignee
Schaeffler Technologies AG & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to DE112015002913.3T priority Critical patent/DE112015002913A5/de
Publication of WO2015192848A1 publication Critical patent/WO2015192848A1/fr

Links

Classifications

    • 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
    • F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
    • F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
    • F16F15/145—Masses mounted with play with respect to driving means thus enabling free movement over a limited range

Definitions

  • the invention relates to a centrifugal pendulum, with the aid of which pendulum masses can be displaced under the influence of centrifugal force to another radius in order to generate a rotational speed opposing directed restoring torque, whereby the extent of the speed fluctuation can be damped.
  • a centrifugal pendulum pendulum has a pendulum mass which can be displaced via rollers guided in corresponding tracks relative to a support flange, which pendulum mass can generate an oppositely directed restoring moment when the speed fluctuates.
  • a centrifugal pendulum for damping rotational irregularities introduced via a drive shaft of a motor vehicle engine is provided with a support flange rotatable about a rotation axis for direct or indirect connection to the drive shaft, a pendulum mass pendulumable relative to the support flange about a rotation center offset radially to the axis of rotation to produce rotational nonuniformity opposing return torque, wherein a center of gravity of the pendulum mass to the center of rotation is spaced by a pendulum length I, a guided in a first pendulum track of the pendulum mass and a first career of the Stromflanschs first roller, the first roller in an undeflected center position of the pendulum under Centrifugal force in a first roller contact point contacted the support flange, and a guided in a second pendulum track of the pendulum mass and a second track of the sensibleflanschs second roller, wherein the second roller in the undeflected center position
  • the distance AB of the roller contact points is comparatively large. Observations have surprisingly shown that thereby the smoothness of the pendulum mass is improved during the pendulum motion. A deflection and / or tilting of the pendulum mass in the axial direction occurs at least less frequently and / or to a lesser extent. Tipping the pendulum mass can be avoided, resulting in a more stable run for the pendulum mass.
  • the spacer elements can thereby be dimensioned smaller and / or designed for lower loads. Preferably, the spacer elements can even be omitted.
  • the roller contact points are achieved by the rollers when the pendulum mass in the undeflected middle position is moved radially outward under the influence of centrifugal force with the support flange rotating and the pendulum mass guided into the pendulum track ten rollers take so far radially outward until the rollers strike from radially inward in the respective raceway of the support flange on the support flange.
  • the pendulum mass In the undeflected middle position, the pendulum mass is in its zero position.
  • the at least one pendulum mass of the centrifugal pendulum under the influence of centrifugal force, endeavors to assume a position as far away as possible from the center of rotation.
  • the "zero position” is thus the position furthest radially from the center of rotation, which the pendulum mass can assume in the radially outward position. With constant input speed and constant drive torque, the pendulum mass will assume this radially outward position The centrifugal force acting on the pendulum mass is thereby divided into one component tangentially and another component normal to the pendulum trajectory.
  • the tangential force component provides the restoring force, which provides the Pendulum mass will bring back to its "zero position"
  • the normal force component acts on a speed fluctuations introducing force application element, in particular a connected to the drive shaft of the motor vehicle flywheel, and there generates a counter-torque, the the speed fluctuation counteracts and dampens the introduced speed fluctuations.
  • the pendulum mass can thus be maximally swung and assume the radially innermost position.
  • the paths provided in the carrier flange and / or in the pendulum mass have suitable curvatures.
  • more than one pendulum mass is provided.
  • the inert mass of the pendulum mass and / or the relative movement of the pendulum mass to the support flange is designed in particular for damping a specific frequency range of rotational irregularities, in particular an engine order of the motor vehicle engine.
  • more than one pendulum mass and / or more than one support flange is provided.
  • the pendulum length I and a distance AB between the first roller contact point and the second roller contact point AB / I ⁇ 6.0 I in particular AB / I ⁇ 5.0 I, preferably AB / I ⁇ 4.0 and particularly preferably AB / I ⁇ 3.0.
  • AB / I ⁇ 5.0 I preferably AB / I ⁇ 4.0 and particularly preferably AB / I ⁇ 3.0.
  • the space requirement of the centrifugal pendulum can be kept low.
  • the size of the pendulum mass may be small enough to connect several pendulum masses distributed in the circumferential direction on the same support flange. Unnecessary imbalances can thus be avoided.
  • Particularly preferred is between a distance from the first
  • Roller contact point is arranged to the second roller contact point, and the angle ⁇ is negative when the center of gravity of the pendulum mass radially inward to the distance from the first roller contact point to the second
  • Roller contact point is arranged. Too much sticking out of the pendulum mass radially outward can be avoided, so that the space requirement of the centrifugal pendulum can be kept low. At the same time, at such an angle ⁇ , a very quiet running of the pendulum mass occurs, so that wear and tear and the risk of wear-induced detuning of the centrifugal pendulum are reduced.
  • the first roller in a radial plane of the first
  • the rollers can remove the forces occurring during operation, in particular centrifugal forces, without a significant risk of component failure.
  • the diameter of the rollers is suitably chosen such that a suitable ratio AB / I and / or the angle ⁇ results.
  • more than one carrier flange is provided, wherein the plurality of carrier flanges each form a first roller contact point with the first roller and with the second roller a second roller contact point, wherein the at least two first roller contact points are arranged substantially parallel to the axis of rotation in the axial direction one behind the other and / or the at least two second roller contact points are arranged substantially parallel to the axis of rotation in the axial direction one behind the other.
  • An inclination of the pendulum mass relative to the radial plane is thereby avoided.
  • essentially symmetrical force relationships can result, which contribute to an increase in the smoothness of the pendulum mass.
  • the pendulum mass and the support flange are designed to be flat on their mutually facing axial sides and / or the rollers along an axial extension of the track to the pendulum track have a constant diameter d.
  • the centrifugal pendulum can thus be designed free of spacers.
  • the geometry of the components used for the centrifugal pendulum can thereby be simplified, whereby the manufacturing cost can be reduced.
  • Fig. 1 a schematic plan view of a centrifugal pendulum
  • FIG. 2 a schematic view, reduced to the travel conditions, of the
  • the centrifugal pendulum 10 shown in Fig. 1 has a support flange 12 which can rotate about a rotation axis 14.
  • the carrier flange 12 is connected, for example, to a drive shaft of an automobile engine and / or a torsional vibration damper, in particular a dual mass flywheel, coupled to the drive shaft.
  • a pendulum mass 16 can oscillate about a rotational center M radially spaced from the axis of rotation 14.
  • the support flange has two suitably curved raceways 18 and the pendulum mass 16 two suitably curved pendulum tracks 20, in each of which a first roller 22 and a second roller 24 is guided.
  • the pendulum mass 16 In the undeflected middle position of the pendulum mass 16 shown in Fig. 1, the pendulum mass 16 is positioned at most far radially outward. In this middle position, the first roller 22 abuts the carrier flange 12 at a first roller contact point A in the raceway 18. At the same time, the second roller 24 is in a second
  • the rollers 22, 24 in this case have the same diameter d.
  • the pendulum mass 16 has a center of mass M which is spaced apart by a pendulum length I from the center of rotation.
  • the center of gravity S moves essentially along a circular path around the center of rotation M.
  • the roller contact points A, B are spaced from each other by a comparatively large distance AB. This results in the turned diameter d of the rollers 22, 24 a correspondingly small angle ⁇ between the distance AB and a distance from the first roller contact point A and / or the second roller contact point B to the center of gravity S of the pendulum mass.
  • the center of mass S is positioned substantially centrally to the distance AB.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

L'invention concerne un pendule centrifuge (10) servant à amortir des irrégularités de rotation induites par l'intermédiaire d'un arbre primaire d'un moteur à combustion interne, ledit pendule centrifuge comportant un flasque support (12) pouvant tourner autour d'un axe de rotation (14), pour assurer une liaison indirecte ou directe à l'arbre primaire, une masse pendulaire (16) pouvant effectuer un mouvement pendulaire relativement au flasque support (12) autour d'un point central de rotation (M) décalé radialement par rapport à l'axe de rotation (14), destiné à produire un moment de rappel dirigé à l'encontre de l'irrégularité de rotation, un centre de gravité (S) de la masse pendulaire (16) étant disposé à une longueur de pendule I du point central de rotation (M), ainsi qu'un premier galet de roulement (22) guidé dans une première trajectoire de pendule (20) de la masse pendulaire (16) et une première voie de roulement (18) du flasque support (12), ledit premier galet de roulement (22) étant en contact avec le flasque support (12) en un premier point de contact du galet (A), sous l'effet de la force centrifuge dans une position centrale non déviée de la masse pendulaire (16), de même qu'un second galet de roulement (24) guidé dans une seconde trajectoire de pendule (20) de la masse pendulaire (16) et une seconde trajectoire de roulement (18) du flasque support (12), le second galet de roulement (24) étant en contact avec le flasque support (12) en un second point de contact du galet (B), sous l'effet de la force centrifuge dans une position centrale non déviée de la masse pendulaire (16), AB/I ≥ 2,0 s'appliquant à la longueur pendulaire et à une distance AB entre le premier point de contact de galet (A) et le second point de contact de galet (B). L'ampleur d'un choc axial de la masse pendulaire (16) est réduite en raison d'un meilleur fonctionnement silencieux de ladite masse pendulaire (16), obtenu eu égard à la distance (AB) relativement importante entre les points de contact des galets (A, B), ces mesures permettant d'éviter des effets d'usure et un dérèglement du pendule centrifuge (10) intervenant avec le temps, ce qui permet de garantir un pouvoir d'amortissement durable du pendule centrifuge (10).
PCT/DE2015/200382 2014-06-20 2015-06-19 Pendule centrifuge WO2015192848A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112015002913.3T DE112015002913A5 (de) 2014-06-20 2015-06-19 Fliehkraftpendel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014211811.5A DE102014211811A1 (de) 2014-06-20 2014-06-20 Fliehkraftpendel
DE102014211811.5 2014-06-20

Publications (1)

Publication Number Publication Date
WO2015192848A1 true WO2015192848A1 (fr) 2015-12-23

Family

ID=53761169

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2015/200382 WO2015192848A1 (fr) 2014-06-20 2015-06-19 Pendule centrifuge

Country Status (2)

Country Link
DE (2) DE102014211811A1 (fr)
WO (1) WO2015192848A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831160A1 (de) * 1998-07-11 2000-01-13 Freudenberg Carl Fa Drehzahladaptiver Schwingungstilger
WO2014080776A1 (fr) * 2012-11-26 2014-05-30 本田技研工業株式会社 Dispositif d'amortissement pendulaire à force centrifuge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831160A1 (de) * 1998-07-11 2000-01-13 Freudenberg Carl Fa Drehzahladaptiver Schwingungstilger
WO2014080776A1 (fr) * 2012-11-26 2014-05-30 本田技研工業株式会社 Dispositif d'amortissement pendulaire à force centrifuge
DE112013005646T5 (de) * 2012-11-26 2015-08-13 Honda Motor Co., Ltd. Fliehkraftpendel-Dämpfungsvorrichtung

Also Published As

Publication number Publication date
DE102014211811A1 (de) 2015-12-24
DE112015002913A5 (de) 2017-03-02

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