Abstract:
A roller bearing includes an outer ring having a substantially cylindrical internal bearing surface and an outside surface defining a plurality of protuberances. A protective coating is applied to the outside surface of the outer ring. An inner ring is coaxially disposed at least partially in the outer ring and has a substantially cylindrical external bearing surface. The external bearing surface and the internal bearing surface define an annular cavity in which a plurality of rolling elements is disposed. The rolling elements are in rolling engagement with the external bearing surface and the internal bearing surface. The outside surface of the outer ring can be case hardened, for example the outer ring can be carburized. The outside surface of the outer ring can be knurled. A method of manufacturing such a bearing is also disclosed.
Abstract:
A bearing having a surface and a self-lubricating surface coating composition deposited on the surface, wherein the self-lubricating surface coating composition includes a curable acrylate composition having a metallic composition. The metallic composition having a metallic acrylate compound according to Formula I: and 30 mass% to 45 mass% PTFE fiber.
Abstract:
A bearing (60) for a vehicle suspension system is provided and includes an outer member (64) and an inner member (62). The outer member (64) defines a first inner surface (66) and a first outer surface wherein the first outer surface is configured to engage an equalizer bar of the vehicle suspension system. The inner member (62) defines a second outer surface (63) and a bore (70) therethrough defining a second inner surface. The inner member is configured to engage a frame of the vehicle suspension system. A first lubricious fabric liner (65) is provided in communication with at least a portion of the first inner surface and the second outer surface. The first lubricious fabric liner slidingly engages at least a portion of one of the first inner surface and the second outer surface in response to relative movement between the equalizer bar and the frame of the vehicle suspension system.
Abstract:
A conveyor chain including a chain pin having an exterior surface; a bearing having a generally tubular body portion having an exterior surface and an interior surface, the chain pin disposed in the generally tubular body portion of the bearing so that the interior surface of the bearing surrounds the exterior surface of the chain pin; and a low friction liner material secured to a surface selected from the exterior surface of said chain pin, the interior surface of the bearing, the exterior surface of the bearing, or combinations thereof.
Abstract:
An end cap (12, 412, 412') includes a body portion (40, 440, 440') having an outer engagement portion (42, 415) for engaging an outer ring of a bearing (72, 472, 472'). The bearing (72, 472, 472') has an outer ring (16, 416, 416') and an inner ring (14, 414, 414') disposed within the outer ring (16, 416, 416'), with an annular cavity (22) between them. The outer engagement portion (42, 415) is substantially annular about a central axis. The body member (40, 440, 440') also has a central engagement portion (46, 413a, 413'). In one shaft and bearing assembly (10), the central engagement portion (46) engages a seating portion (54) on the shaft (30). Alternatively, on a bearing, a central engaging portion (413a) engages a seating portion on an inner ring (414). An outer engagement portion (415) may mechanically couple an end cap (412') to the outer ring (416) of a bearing (472'), or may sealingly engage the outer ring (16, 416). The end cap body portion (40, 440, 440') extends from the outer ring (16, 416) across the annular cavity (22) to sealingly engage the inner ring (14, 414) or the shaft (30, 430).
Abstract:
A rolling bearing has a first ring, a second ring concentric with the first ring, and a plurality of rolling elements disposed between the first and second rings, the first ring and the second ring both being generally annular and having gaps therein. A rotating mechanism has a support structure, a rotating structure, and a rolling bearing as described herein mounted on the support structure and engaging the rotating structure. A rotating mechanism having a CTE and a non-split ring bearing having a bearing CTE that is significantly less than the mechanism CTE can be improved by replacing the non-split ring bearing with a bearing having a similar CTE and a gap in the inner ring and in the outer ring.
Abstract:
A coating composition includes an epoxy resin including an epoxy monomer, a toughener and one or more self-lubricating fillers. The coating composition can be employed in a bearing that has an outer member that has a radially inwardly facing surface that defines an interior area. An inner member is disposed in the interior area. The inner member has a radially outward facing bearing surface. The coating composition is disposed between the radially inwardly facing surface and the radially outward facing bearing surface.
Abstract:
A piston assembly for a lead-lag damper for a blade mounted on a rotor of a helicopter includes a piston-rod that has an inside surface and a piston-head that extends radially outward therefrom. The piston-rod has two ports extending therethrough on opposing sides of the piston-head. A sleeve is positioned in the piston-rod and has two annular passages that communicate with the respective ports. A valve spool is disposed in and slidingly engages the sleeve. The valve spool has a channel which is in variable fluid communication with two passages. The piston assembly includes a biasing member that biases the valve spool axially away from it. The channel has an axial width configured to variably regulate fluid flow between the two ports to control dampening of the piston-rod in response to centrifugal forces applied to the valve spool.
Abstract:
A piston assembly including a shaft having a piston arrangement. The piston arrangement has a retract-area on one side and a extend-area on the opposite side. The retract-area is larger than the extend-area so that when fluid exerts a force on the retract-area the piston arrangement generates and applies a retract force to the shaft. Upon release of the fluid pressure to the retract-area and application of the fluid pressure to the extend-area the piston arrangement generates and applies an extend force to the shaft. The retract force is greater than or equal to the extend force.
Abstract:
A sleeve for a valve assembly has an inside surface having an interior area and a first cylindrical section extending from a first axial end and a second cylindrical section located between the first cylindrical section and second axial end. A conical interior seating surface extends between the first and second cylindrical sections. The conical interior seating surface is metallic. The sleeve includes a groove that extends circumferentially around and radially outward in the first cylindrical section. The groove extends axially away from the conical interior seating surface towards the first axial end. The sleeve has one or more ports extending radially through the first cylindrical section proximate the groove and are spaced apart from the groove by a lip formed by the first cylindrical section. The lip extends a predetermined axial distance between the groove and the port. The lip extends around the first cylindrical section and radially inward.