Abstract: Systems and methods for damping torsional oscillations of downhole systems are described. The systems include a downhole drilling system disposed at an end of the downhole system in operative connection with a drill bit. A damping system is installed on the downhole drilling system, the damping system having at least one damper element configured to dampen at least one HFTO mode. At least one mode-shape tuning element is arranged on the drilling system. The at least one mode-shape tuning element is configured and positioned on the drilling system to modify at least one of a shape of the HFTO mode, a frequency of the HFTO mode, an excitability of the HFTO mode, and a damping efficiency of the at least one damper element.

Abstract: A lock-up device for a torque converter is provided with a simple structure which reduces manufacturing costs, and which may reduce a size of the entire torque converter by minimizing an installation space of a dynamic damper.

Abstract: There is provided a vibration insulator mounted between a cartridge and a wheel-side housing, in which the cartridge includes a rotor having a wheel and a rotational shaft and a bearing housing accommodating a bearing rotatably supporting the rotor, and the wheel-side housing is to be pressed to the bearing housing in an axial direction. The vibration insulator includes an annular outer ring portion having a wheel-side contact surface configured to come into contact with the wheel-side housing, an annular inner ring portion disposed inside the outer ring portion with a clearance from the outer ring portion and having a bearing-side contact surface configured to come into contact with the bearing housing, and a flexible support portion interposed between the outer ring portion and the inner ring portion and connecting the outer ring portion and the inner ring portion, the flexible support portion being elastically deformable.

Abstract: A viscous damper has an inertial mass in the form of a tubular member that is applicable for dissipating (removing) destructive torsional vibration in power transmitting shaft assemblies. A viscous fluid contained between moving surfaces is sheared, thereby producing frictional heat which is then allowed to transfer across the moving surfaces to the ambient surroundings. Surfaces of the inertial mass and housing are arranged with respect to each other to provide high shear rate and energy dissipation (damping) is obtained within a small volume.

Abstract: A blade damper with a magnetic contaminants trap includes, a housing defining a cavity, a piston in operable communication with the housing dividing the cavity into at least a first chamber and a second chamber, a passageway in operable communication with the cavity configured to allow fluid within the cavity to move between the first chamber and the second chamber through the passageway, and at least one magnet in operable communication with fluid in at least one of the cavity and the passageway, such that magnetic contaminants are prevented from freely moving about within the fluid after having been attracted toward the at least one magnet by a magnetic field of the at least one magnet.

Abstract: A transmission includes a transmission housing having an output shaft flange including a central passage. An output shaft extends through the central passage. The output shaft defines a shaft axis and including an axial end portion. A vibration dampener is mounted to the axial end portion of the output shaft, and a mechanical fastener is received by the axial end portion of the output shaft. The mechanical fastener operatively connects the vibration dampener to the output shaft.

Abstract: When “It” is defined as the moment of inertia of all elements included in a torque transmission path from a front cover 3 to a damper hub 7, “Im” is defined as the moment of inertia of a first intermediate member 12 coupled to a vibration absorption spring Spd of a dynamic damper 20, “Idd” is defined as the moment of inertia of a mass body of the dynamic damper 20, “A=Im/It”, “B=Idd/Im”, and “Netag” is defined as a rotation speed of an engine corresponding to a frequency of vibration to be damped by the dynamic damper, the starting device is configured so as to satisfy 0.04?A?0.10, 0.90?B?2.60 and 900 rpm?Netag?1400 rpm.

Abstract: A control apparatus for a hybrid vehicle configured to control the hybrid vehicle provided with: an engine; a flywheel with a variable inertial mass; a rotary electric machine; a regenerating device; and an electricity storage device which is charged by regenerative power of the rotary electric machine and regenerative power of the regenerating device, is provided with: a reduction control device configured to reduce the number of engine revolutions to a stop allowable number of revolutions or less; a stop control device configured to stop the engine after the number of engine revolutions is reduced to the stop allowable number of revolutions or less; a specifying device configured to specify allowable charging power of the electricity storage device at the time of the stop demand; and an inertia control device configured to reduce the inertial mass with decreasing the specified allowable charging power.

Abstract: A pneumatic liquid on-line automatic balancer of a rotor includes: a sealed balancing disk rotating with a balanced rotor and a pressure transfer device mated with the sealed balancing disk. At least two pairs of centrosymmetric chambers filled with appropriate balancing liquid are evenly distributed in the sealed balancing disk. The pressure transfer device controls compressed gas in and out of the chamber and makes the balancing liquid controllably flow in each pair of chambers to achieve dynamic balance of the rotor. A communicating channel of the balancing liquid is provided between each pair of the chambers. The communicating channel of the balancing liquid is one and a center of the communicating channel of the balancing liquid is communicated with the balancing channel pointed to a center of rotation. The balancing channel is communicated with an emptying channel opened to atmosphere.

Abstract: A load coupling device for a power train including: a rotatable shaft; a first flange on a first end of the shaft, wherein the first flange is adapted to couple to a first rotating shaft of at a torque producing turbine or a torque driven electrical generator; a second flange on an opposite end of the shaft, wherein the shaft is adapted to couple to a second rotating shaft of the other of the turbine and the generator, and an annular ring extending radially outward from the first flange, wherein the mass of the annular ring is selected to shift a torsional natural frequency of the power train away from an operational condition of the power train. Trim masses may be added to make fine adjustments to the torsional natural frequency of the power train.

Abstract: A washing machine includes a cabinet, a drum rotatably arranged within the cabinet, an annular recess provided in the drum, and a balancer to offset an unbalanced load caused within the drum during rotation of the drum. The balancer includes a balancer housing mounted to the recess and has an annular channel therein, at least one mass movably disposed in the channel, and at least one ball disposed between the balancer housing and the mass to generate rolling motion.

Abstract: A centrifugal-pendulum vibration absorbing device disposed within a liquid chamber that stores a liquid, the centrifugal-pendulum vibration absorbing device having a support member coupled to a rotary element that is rotated by power from a drive device; and a mass body supported by the support member so as to be swingable. An order of vibration of the mass body is determined on the basis of an order of vibration to be damped generated by the drive device in consideration of at least a force caused by a centrifugal liquid pressure generated within the liquid chamber along with rotation of the drive device to act on the mass body.

Abstract: A balance ring for an appliance is provided that has features to control fluid distribution particularly during certain critical speeds where large oscillatory motion created by an out of balance condition might otherwise cause the balance ring fluid to redistribute improperly. The balance ring can include an inner chamber that is in fluid communication with an outer chamber. The inner chamber can include baffles that impede the movement of fluid along the circumferential direction when e.g., the balance ring experiences large oscillatory motion.

Abstract: A self-governing fluidic variable inertia flywheel that can maintain a constant angular velocity is disclosed. The flywheel uses a movable member to separate a liquid filled chamber from a gas occupying chamber. In one embodiment, a self-governing fluidic variable inertia flywheel includes a container having an internal volume and a movable member disposed within the container such that the internal volume is separated into a first chamber and a second chamber containing a fluid. The movable member is responsive to changes in angular velocity of the fluid.

Abstract: A torque transmission assembly, particularly a hydrodynamic torque converter, a fluid coupling or a wet clutch, includes a housing arrangement that includes a torsional vibration damper arrangement having an input region which is coupled to or can be coupled to the housing arrangement and an output region to be coupled to a driven member. The torque transmission assembly also includes at least one mass damper arrangement having a damper mass arrangement which is coupled to the torque transmission assembly by a mass damper elastic arrangement.

Abstract: A flywheel includes a disc-shaped flywheel body having a peripheral surface defining a circumference of the flywheel body, a central hub connected to the body for mounting the flywheel on a crankshaft or other flywheel support, and a plurality of chambers in the flywheel body radially spaced from the central hub and angularly spaced about the circumference of the flywheel body.

Abstract: A method of reducing vibration in a rotary system (120, 130) of a motor vehicle, for example a car (100), comprising: balancing said rotary system (120, 130), characterized by providing a rotational element (300, 302-306) comprising a chamber (310-312) having a fulcrum on a rotational axis (340) of said rotational element (300, 302-306), comprising a circumferential balancing area (320) and being partially filled with an amount of a thixotropic balancing substance (330). A corresponding apparatus and system.

Abstract: A balancing group (22) is described for the rotor of a fluid rotary machine (10), wherein the rotor is of the type comprising at least one shaft (16) equipped with an internal pass-through hole (20) which develops along the longitudinal axis (A) of the shaft (16). The balancing group (22) includes at least a first inner element (24) and at least a second outer element (26), the first inner element (24) being suitable for being engaged by interference, in the direction of the longitudinal axis (A), inside the second outer element (26). The balancing group (22) thus formed is suitable for being inserted, in the direction of the longitudinal axis (A), inside the pass-through hole (20) of the shaft (16).

Abstract: A composition for balancing a rotary system, comprising an amount of a thixotropic balancing substance; characterized by an amount of hydrophobic particles distributed in said amount of said thixotropic balancing substance. A corresponding method and system.

Abstract: A self-governing fluidic variable inertia flywheel that can maintain a constant angular velocity is disclosed. The flywheel uses a movable member to separate a liquid filled chamber from a gas occupying chamber. In one embodiment, a self-governing fluidic variable inertia flywheel includes a container having an internal volume and a movable member disposed within the container such that the internal volume is separated into a first chamber and a second chamber containing a fluid. The movable member is responsive to changes in angular velocity of the fluid.

Abstract: The variable inertia flywheel is a wheel on an axle with a toroidal hollow tubular rim that is completely filled with a fluid. The tubular rim contains one of more one-way valves that allow the fluid to pass in the opposite direction of rotation. When torque is applied to the axle the wheel accelerates but the fluid lags in acceleration. The wheel has two components of inertia, the solid material of wheel and the fluid. The fluid lag lowers the effective moment of inertia of the total system compared to a solid flywheel of the same mass. After a period of time the fluid acquires the same speed as the wheel. The one way valves close on deceleration. The wheel now operates as a solid flywheel of the same total mass to deliver energy to the load.

Abstract: A uniformity and stabilizing system comprising a stabilizing ring used in conjunction with a balanced tire wheel assembly wherein the stabilizing ring destroys, absorbs, and dampens vibrations including those caused by non-uniformities in the tire. The stabilizing ring comprises either a solid ring or a cartridge having at least one interior chamber, the interior chamber filled with a flowable media. The stabilizing ring may be used in combination with balance weights.

Abstract: An inertial navigation system is provided. The system includes a sensor block, an outer shell that substantially surrounds the sensor block and a plurality of gas pads connected to the outer shell that float the sensor block in gas creating a near frictionless environment to allow the sensor block to rotate in all directions. Each of the plurality of gas pads is adapted to receive pressurized gas. The outer shell and the sensor block are separated by a gap created by the pressurized gas at each pad.

Abstract: Provided herein is an automatic balancing device for counterbalancing an out-of-balance mass present in a rotating body. The automatic balancing device includes a chamber with an outer wall and an axis, first and second counterbalancing masses constrained to move freely in a circular path about the axis within the chamber, and a viscous fluid provided in the chamber so as to provide viscous coupling between the outer wall of the chamber and each of the counterbalancing masses. The counterbalancing masses may be arranged so that the first counterbalancing mass leads the second counterbalancing mass when the device is in use. A constraint may be provided with the device so as to prevent the first counterbalancing mass from leading the second counterbalancing mass by more than substantially 180°.

Abstract: A viscous torsional vibration damper comprising a housing adapted to be connected to a rotary member to be damped, the housing comprising an annular chamber having an inner cylindrical surface and an outer cylindrical surface elongated about a central axis, an inertial mass within the chamber and having an inner cylindrical surface and an outer cylindrical surface elongated about an axis of rotation, the inertial mass and the chamber configured such that the inertial mass is rotatable in the chamber relative to the housing, a first annular centering element and a second annular centering element between the opposed inner cylindrical surfaces of the chamber and the inertial mass or the opposed outer cylindrical surfaces of the chamber and the inertial mass, the annular centering elements configured and arranged to bias the axis of rotation of the inertial mass towards alignment with the central axis of the chamber, a clearance gap between the housing and the inertial mass, the clearance gap having a first port

Abstract: A viscous damper having an annular inertial mass body received in a case together with a damping liquid, and a hub for fixing the case on the rotary shaft of an internal combustion engine. The case including a case main body of substantially U-shaped cross section, and a cover for liquid-tightly closing an opening directed to one axial side of the main body, and defining a sealed chamber in the inside. The inertial mass body is made by superposing and joining a plurality of annular plates. By thrust bearings attached in holes in the annular plate on body axial sides of the inertial mass body and by a journal bearing attached in a recessed groove in the inner periphery of the inertial mass body, the inertial mass body is supported both axial sides and radially and disposed for peripheral rotation in the sealed chamber.

Abstract: A weight 4 which is held by a weight holder 3 in a balancer has a pressing face 4b? which is pressed against a guide face 12a provided along the circumferential direction of rotation of the weight holder 3 by centrifugal force generated by rotation of a rotary body. When the rotary body rotates, the weight 4 which is pressed against the guide face 12a via the pressing face 4b? changes its position relative to the rotary body in the circumferential direction of rotation, whereby the weight 4 is disposed in a position in which it suppresses whirling motion of the rotary body. The guide face 12a and pressing face 4b? are inclined relative to the axial direction of rotation so as to tend to outward side in the diametrical direction of rotation as tending to one side in the axial direction of rotation. The weight 4 is pressed against a receiving portion 7a? by component of the centrifugal force, in which the component acts along the guide face 12a and pressing face 4b?.

Abstract: A flexplate comprising a single integral body portion having a generally circular shape. One or more borings are formed in the body portion for receiving an end of a crankshaft of the engine on a first side of the body portion and for receiving a torque converter of an unrelated transmission on a second side of the body portion. Apertures may be formed in the body portion and positioned on the flexplate for alignment with corresponding apertures on a flange mounted to the end of the crankshaft and apertures on the torque converter.

Abstract: A weight comprising a cartridge having at least one interior chamber, the interior chamber at least partially filled with a flowable balance media, and wherein the cartridge is longitudinally arcuate, at least when attached to a wheel, about an angle of up to 180 degrees or less. The weight provides a balanced tire in the new or just balanced condition and helps retain the balance under changes in at least one operational characteristic of the tire/wheel assembly.

Abstract: A weight comprising a cartridge having at least one interior chamber, the interior chamber at least partially filled with a flowable balance media, and wherein the cartridge is attached to the wheel in a position oblique to the radial centerline of a tire/wheel assembly. The weights provide a balanced tire in the new or just balanced condition and helps retain the balance under changes in at least one operational characteristic of the tire/wheel assembly.

Abstract: An apparatus and method for selecting an appropriate viscous fluid for use in control moment gyroscopes, reaction wheels, momentum wheels and the like. Components such as the housing, the rotor, and the viscous fluid are modeled using a three-parameter isolator system, which allows optimization of the damping action for a given application.

Abstract: A two-stage, bi-directional shift lever vibration isolator. A shift lever has a sleeve whereinside is a lever vibration isolator which includes a damping body having an axial bore and an outer surface characterized by an hour-glass cross-section composed of convex and concave surfaces; a transmission shift shaft attachment housing located in the bore; an upper washer connected to the housing and abutting an upper end of the damping body; and a lower washer connected to the housing and abutting a lower end of the damping body. The upper and lower washers are sized to provide a predetermined perimeter separation with respect to the sleeve. The hour-glass cross-section of the damping body provides bi-directional natural frequency of vibration and stiffness.