An actively controlled squeeze film damper system comprises a housing defining an annulus receiving a damping fluid during operation, a lubricant source supplying damping fluid to the annulus, and a sensor assembly for measuring a parameter indicative of a compressibility of the damping fluid. A control device adjusts the compressibility of the damping fluid within a predefined range.

An aircraft gas turbine engine (10) comprises a main engine spool (22) and a bearing arrangement (36) configured to rotatably support the main engine spool (22). The bearing arrangement (36) includes a damper (41) comprising a static element (42) and a moveable element (39). The gas turbine engine further comprises an electric machine (30) comprising a rotor (34) and a stator (32). The rotor (34) is mounted to the main engine spool (22), and the stator (32) is mounted to the moveable element (39) of the damper to be moveable with the moveable element (39).

A turbocharger for an engine includes a housing, a shaft, a turbine wheel mounted to the shaft for rotation therewith, a compressor wheel mounted to the shaft for rotation therewith, and a bearing cartridge rotatably supporting the shaft relative to the housing. The housing is positioned axially between the turbine and compressor wheels. The bearing cartridge includes an inner ring mounted to the shaft, an outer ring disposed between the inner ring and the housing and movable relative to the housing, and a first and a second plurality of roller elements axially spaced apart from one another and disposed radially between the inner and outer rings to rotatably support the inner ring relative to the outer ring. A radial gap (RD) is defined between the outer ring (134) and the housing (126). Lubricant flows into the radial gap and radially separates the outer ring from the housing during operation of the turbocharger.

A squeeze film damper bearing assembly includes a bearing and a spring cage that receives and surrounds the bearing. The spring cage has an inner diameter and an outer diameter. The outer diameter has an outer surface that defines a first circumferential channel recessed within the outer surface that is axially spaced apart from a second circumferential channel recessed within the outer surface and at least one axial anti-rotation chamber that interconnects the first and second channels. The assembly includes a first piston ring received in the first channel and a second piston ring received in the second channel. The assembly includes at least one anti-rotation member received within the at least one axial anti-rotation chamber that cooperates with the first piston ring and the second piston ring to inhibit a rotation of the first piston ring and the second piston ring relative to the outer surface.

A multi-film oil damper for accommodating radial movement of a rotary shaft bearing relative to a bearing housing, the multi-film oil damper comprising: an annular damper cavity defined within the bearing housing between a radially outward wall, a first radially extending side wall and a second radially extending side wall, the annular damper cavity having an oil inlet in the radially outward wall, the oil inlet being in communication with a source of pressurized oil; an inner damper ring having axial ends abutting the first and second radially extending side walls of the annular damper cavity; a plurality of outer damper rings coaxially nested between the inner damper ring and the radially outward wall, each outer damper ring having axial ends adjacent the first and second radially outward walls of the annular damper cavity, each outer damper ring having a first cylindrical surface and a second cylindrical surface; a plurality of spacer bosses circumferentially spaced apart at each axial end of the plurality of outer damper rings, a contact surface of each spacer boss extending radially beyond the first surface of an associated outer damper ring and engaging the second surface of an adjacent outer damper ring defining an oil filled gap there between; and a radial oil channel through a central portion of the plurality of outer damper rings in fluid communication with the oil inlet.

A vehicle weight measurement device includes a diaphragm which covers an opening area of a groove portion of a mounting part to form an oil chamber of a predetermined space together with the groove portion; a pressure sensor which detects a change in pressure of measurement fluid in the oil chamber; a first piston which presses the diaphragm; a second piston which presses the first piston; and a bearing unit interposed between the second piston and a spring bush which receives one end of a spring of a suspension device and is relatively rotatable. The bearing unit includes a thrust needle bearing which swingably supports a load in a longitudinal direction of the suspension device, and a slide bush which does not receive a load in the longitudinal direction and receives a load in a radial direction while causing constant damping to swinging.

There is disclosed a bearing assembly for a gas turbine engine including at least two bearings axially spaced from one another relative to a central axis, and a squirrel cage secured to a casing of the gas turbine engine. The squirrel cage supports respective bearing loads of the at least two bearings. The squirrel cage has a frangible section between the bearings configured to preferentially fail upon application of a load greater than a preselected threshold bearing load.

A device for damping a rolling bearing includes a support and a radially flexible cage. The cage includes a ring provided in order to be mounted on the periphery of a rolling bearing. The radial flexibility of this cage results from the structure thereof which is perforated by oblique posts connecting the ring to an attachment annulus of this cage. The support includes a plurality of teeth each extending radially through a respective inter-post opening of the cage. The ring and the support form, radially between one another, a fluid damping cavity suitable for forming a compressed fluid film. The device allows a controlled radial movement of the ring, the latter being radially limited by the support, while having a limited footprint.

A floating brush seal assembly includes a ring-shaped housing defining a radially inwardly open internal cavity; a brush seal in the cavity and having bristles extending radially inwardly and offset to seal against a rotating body; a radial spring positioned to exert a radial inwardly directed force against the brush seal relative to the housing; and an axial spring positioned to exert an axially directed force against the brush seal relative to the housing.

A multi-film oil damper suited for accommodating radial movement of a rotary shaft bearing relative to a bearing housing, the multi-film oil damper comprising: an annular damper cavity defined within the bearing housing between a radially outward wall and radially extending side walls; an inner damper ring; an outer damper ring disposed between the inner damper ring and the radially outward wall of the annular damper cavity; wherein the annular damper cavity has an oil inlet in communication with a source of pressurized oil; and wherein a radial thickness of the inner damper ring exceeds a radial thickness of the outer damper ring.