A slew bearing includes a stationary bearing ring to be fixed to a base, and a moveable bearing ring to be fixed to a moveable object, wherein the stationary bearing ring and the moveable bearing ring are configured to enable rotation of the moveable bearing ring relative to the stationary bearing ring about a rotation axis. A main axial bearing and an auxiliary bearing are provided between the stationary bearing ring and the moveable bearing ring, wherein the moveable bearing ring includes one or more main portions and one or more auxiliary portions, which one or more main portions are moveable relative to the one or more auxiliary portions between an operational position, in which the main axial bearing transfers the axial loads between moveable bearing ring and stationary bearing ring, and a raised maintenance position, in which the auxiliary axial bearing transfers the axial loads between moveable bearing ring and stationary bearing ring and the main bearing is allowed to be inspected and/or maintained so that the slew bearing during inspection and/or maintenance is still operational.

An impeller-type liquid ring compressor having a particular bearing configuration. Such a bearing arrangement may completely support the impeller as it rotates, eliminating many of the problems inherent in the prior art designs without changing the general overhung impeller design. This may allow the impeller-type liquid ring compressor to be easily retrofitted in existing use environments, such as, for example, oil and gas processing facilities, oil refineries, and petrochemical processing facilities. In some exemplary embodiments, a thrust bearing may be located on the front face of the impeller, or radial bearings may be disposed between the vanes of the impeller. A radial bearing and thrust bearing may further be disposed on the shaft side of the impeller close to the impeller itself. The compressor may be configured so that the process fluid carries heat away from each of these bearings.

Disclosed herein is a motor including a bearing in which a rolling member is disposed between an inner ring and an outer ring, a spring connected to the outer ring, and a pusher connected to the spring to be retracted to a first position spaced apart from the inner ring by the spring, and to be advanced to a second position at which friction with the inner ring is caused by a pressure of air acting on a pressure surface when the pressure surface on which the pressure of air flowing by the impeller acts is formed, wherein the inner ring is spaced apart from the rotating shaft by a gap formed between the inner ring and the rotating shaft when the pusher is at the second position.

A rotatable bearing assembly transfers a weight of a drill string to a mud motor output shaft extending therethrough. The bearing assembly includes an outer bearing housing, an upper radial bearing assembly providing an upper radial bearing between the outer bearing housing and the output shaft, a balance piston that fluidly seals an upper end of the outer bearing housing and balances a pressure within the outer bearing housing, a lower radial bearing/seal assembly configured to both fluidly seal a lower end of the outer bearing housing and provide a lower radial bearing between the outer bearing housing and the output shaft, and a thrust bearing assembly received within the sealed interior of the outer bearing housing such that the bearing assembly initially operates in a sealed, lubricated mode and then a mud lube mode in the event of one or more seal failures. Other embodiments are also disclosed.

A rolling bearing has an outer diameter surface of the outer ring which is a fitting surface with a housing and the inner diameter surface of the inner ring, which is a fitting surface with a shaft. The outer diameter surface of the outer ring or the inner diameter surface of the inner ring is coated with a bonded film containing an organic binder, a solid lubricant powder such as molybdenum disulfide powder, and a friction/wear modifier such as antimony oxide powder. According to the rolling bearing, a creep resistance is kept excellent without causing increase in cost and size and being deformed and softened.

A rolling bearing has an outer diameter surface of the outer ring which is a fitting surface with a housing and the inner diameter surface of the inner ring, which is a fitting surface with a shaft. The outer diameter surface of the outer ring or the inner diameter surface of the inner ring is coated with a bonded film containing an organic binder, a solid lubricant powder such as molybdenum disulfide powder, and a friction/wear modifier such as antimony oxide powder. According to the rolling bearing, a creep resistance is kept excellent without causing increase in cost and size and being deformed and softened.

A mud-lubricated bearing section including a seal assembly for directing a fluid flowing through a mud-lubricated bearing into a central bore of a mandrel. At least one mud-lubricated bearing is positioned in an annular space between the mandrel and a housing. The seal assembly directs the fluid from the annular space through a mandrel fluid port into the mandrel central bore. The seal assembly seals the annular space, and includes a piston, a plug, and a chamber between the piston and the plug. The piston is configured for axial movement relative to the mandrel and the housing, while the plug is axially fixed relative to the mandrel and/or the housing. The chamber is configured to contain a lubricating fluid. The piston includes inner and outer seals. The plug includes a lower seal and a passage allowing the fluid from the chamber to reach the lower seal for lubrication.

A method of manufacturing a universal joint includes: temporarily assembling a bearing, which supports a shaft portion of a joint spider such that the shaft portion is rotatable, with respect to a through-hole and the shaft portion by press-fitting the bearing to a first position in the through-hole of a yoke; and clinching, after the bearing is temporarily assembled, a portion of the yoke around the through-hole, and pressing the bearing deeper into the through-hole with a clinched portion formed by the clinching to press-fit the bearing to a second position located deeper than the first position in the through-hole.

Disclosed is a secondary clamping device for a wheel. Two bearings and a spacing ring are closed in a base by a bearing end cover, a shaft sleeve is mounted on the bearings, a linear bearing and a gland are fixed on the shaft sleeve, a positioning pin is fixed at the top of the floating shaft, two ends of the spring A are respectively connected with the positioning pin and the linear bearing, and the positioning pin can move up and down under the action of the spring A. A pull rod is fixed on the gland, the outer wall of the floating column is connected with the inner hole of the shaft sleeve, two ends of the spring B are respectively connected with the gland and the floating column.

An epicyclic gear system for a gas turbine engine includes a planet carrier with at least one structural member, on which a planet gear is pivot-mounted by a bearing that is radially arranged between the planet gear and the structural member. Furthermore, a roller bearing device is arranged radially between the planet gear and the bearing. A relative movement between the planet gear and the bearing is prevented by the roller bearing device, if a friction torque in the region of the bearing is less than or equal to a threshold value.