A torsional vibration damper (1) having a hub part (2) (primary mass) that is able to be fastened to a driveshaft of a motor, and an inertia ring (3) (secondary mass) that surrounds the hub part (2) in the radially outer region, wherein a fluid-filled gap (4) and sealing devices (5), by means of which the escape of the fluid is intended to be avoided, are provided between the hub part (2) and inertia ring (3), wherein the sealing devices (5) each have a first ring (6), tightly connected to the hub part (2), and each have a second ring (7), tightly connected to the inertia ring (3), and each have a sealing element (12) made of an elastomer, which is connected in each case sealingly to the first ring (6) on one side and in each case to the second ring (7) on the other side, is configured such that the respective sealing element (12) has been vulcanized onto a respective external axial side of the first and second ring (6, 7) by fastening portions.

A damping actor selector may be configured to transition a multi-actor damping system from a first damping actor configuration to a second damping actor configuration. The multi-actor damping system may be used in a shock strut assembly to alter a damping curve of the shuck strut assembly. The damping actor selector may be coupled to a metering pin of a shock strut assembly. The damping actor selector may be configured to rotate the metering pin to transition the multi-actor damping system from a first damping actor configuration to a second damping actor configuration. The first damping actor configuration may correspond to a first damping curve. The second damping actor configuration may correspond to a second damping curve. The first damping curve being different than the second damping curve.

A rotor assembly of an electric machine includes a rotor body and a shaft assembly located at a central axis of the rotor assembly, and operably connected to the rotor body. The shaft assembly includes a main rotor shaft operably connected to the rotor body, a center drive shaft located inside of the main rotor shaft, and a hydraulic damper sleeve located radially between the main rotor shaft, defining a plurality of cavities between the hydraulic damper sleeve and the center drive shaft. The hydraulic damper sleeve is configured to urge a fluid into and out of the plurality of cavities thereby damping relative circumferential motion between the main rotor shaft and the center drive shaft.

A shock-absorbing twisting structure includes a first seat and a second seat. The first seat includes an elastic member. A stop member is arranged at one side of the first seat. The second seat is formed with a receiving chamber that is fit over the first seat, such that the elastic member is set in elastic engagement with and is supported between the first seat and the second seat. A main axle penetrates through the second seat and is received in the first seat to set the second seat in a rotatable condition. An elastic unit is arranged at each of two sides of the receiving chamber and the stop member.

In a system for monitoring a vibration-isolated foundation, the system includes: an air pressure monitoring system for monitoring air pressure supplied to air mounts of the vibration-isolated foundation, wherein the air pressure monitoring system includes: a plurality of air ports configured to receive air to be supplied to the air mounts; a plurality of pressure sensors, each of the pressure sensors being configured to measure the pressure of the air supplied to a corresponding one of the air ports and to output the measured pressure as a sensing signal; a control unit configured to receive the sensing signal from each of the pressure sensors and to output a control signal according to a measured value of each of the pressure sensors; and a notification unit configured to operate according to the control signal of the control unit.

A damper arrangement for a motor vehicle drive train includes a damper (120) for damping torsional vibrations and a rotationally fixed fluid guide element (110). The fluid guide element (110) is axially adjacent to the damper (120). The damper (120) has at least one duct (112-1, 112-2, 112-3). A fluid (140) that at least partially surrounds the damper (120) is conveyed through the at least one duct (112-1, 112-2, 112-3) when the damper (120) rotates.

A damper arrangement for a motor vehicle drive train includes a damper (120) for damping torsional vibrations and a rotationally fixed fluid guide element (110). The fluid guide element (110) is axially adjacent to the damper (120). The damper (120) has at least one duct (112-1, 112-2, 112-3). A fluid (140) that at least partially surrounds the damper (120) is conveyed through the at least one duct (112-1, 112-2, 112-3) when the damper (120) rotates.

A biasing member compression fixture may have a first leg and a second leg. The legs may be substantially parallel one another and separated by a gap. The fixture may also have a base member connecting the first and second legs and extending across the gap. The biasing device may be connected to the base member and a ram may be connected to the biasing device. An upper member may connect the first and second legs and extend across the gap. A recess may be located in the upper member. A biasing member detecting unit may be connected to the upper member and may be adapted to detect a biasing member in the recess.

A rotor assembly of an electric machine includes a rotor body and a shaft assembly located at a central axis of the rotor assembly, and operably connected to the rotor body. The shaft assembly includes a main rotor shaft operably connected to the rotor body, a center drive shaft located inside of the main rotor shaft, and a hydraulic damper sleeve located radially between the main rotor shaft, defining a plurality of cavities between the hydraulic damper sleeve and the center drive shaft. The hydraulic damper sleeve is configured to urge a fluid into and out of the plurality of cavities thereby damping relative circumferential motion between the main rotor shaft and the center drive shaft.

In one aspect, a rotary device is provided, and includes a shaft adapter, a chambered member, a seal member and at least one internal torque transfer member. The shaft adapter is connectible to a crankshaft or accessory shaft and defines an axis. The chambered member (e.g. a pulley) is rotatably connected to it, and at least partially encloses a chamber (e.g. for oil), and includes a circumferential portion, a first side wall, and a second side wall which is a separate member from the circumferential portion. One of the circumferential portion and the second side wall has projections thereon, and the other has valleys that mate with the projections with no clearance, so as to be able to transfer a torque of at least 10 Nm into one another without plastic deformation. A seal member is compressed between the second side wall and the circumferential portion.