Abstract: In an embodiment, an aircraft includes a drive system, a main engine coupled to the drive system to provide first power, and a supplemental engine coupled to the drive system to provide second power additive to the first power. The aircraft also includes a control system to control the main engine and the supplemental engine to optimize usage of the supplemental engine. The control system is operable to maintain the supplemental engine in a reduced power state at least until a determination is made that supplemental power is needed to satisfy a total power demand of the drive system. The control system is also operable to determine that supplemental power is needed to satisfy the total power demand of the drive system. The control system is further operable to increase a power level of the supplemental engine in response to the determination that supplemental power is needed.

Abstract: An upper rudder carrier bearing for a ship which has a bearing housing formed of a housing base body and a housing cover. An axial and a radial bearing are disposed in the bearing housing, which are both configured as plain bearings. The axial and/or the radial bearing is configured as a self-lubricating bearing.

Abstract: In a mud-lubricated bearing assembly for a downhole motor, a mechanical seal is provided between the mandrel and the lower end of the bearing housing to prevent discharge of drilling fluid (mud) from the bearing assembly into the wellbore annulus. The mechanical seal is effected by mating wear-resistant annular contact surfaces provided on the mandrel and the bearing housing, with biasing means preferably being provided to keep the contact surfaces in sealing engagement during both on-bottom and off-bottom operational modes. The diverted drilling fluid passing through the bearings is redirected into the bore of the mandrel via ports through the mandrel wall to rejoin the main flow to the drill bit, such that substantially all of the drilling fluid flows through the bit.

Abstract: A thrust sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin and has an annular lower surface (2); a lower casing (5) which is made of a reinforced synthetic resin including, in addition to polyacetal resin, reinforcing fibers such as glass fibers contained in this polyacetal resin, is superposed on the upper casing (3) so as to be rotatable about an axis O of the upper casing (3) in an R direction, and has an annular upper surface (4) opposed to the annular lower surface (2) of the upper casing (3); an annular thrust sliding bearing piece (6) which is made of polyacetal resin and is interposed between the annular lower surface (2) and the annular upper surface (4); and a tubular radial sliding bearing piece (7) made of polyacetal resin.

Abstract: In order to prevent degradation of accuracy and decrease of strength when a hydrodynamic bearing device is assembled and to reduce a cost of the hydrodynamic bearing device, a guide face serving as a guide when a disc hub is press fitted into a shaft member is formed on the shaft member. Then, the guide face, an outer circumferential surface of the shaft member adjacent to the guide face, and a boundary portion between the guide face and the outer circumferential surface are ground simultaneously, thereby forming a blunting portion having a radius r in the boundary portion. Thus, no edge remains between the guide face and the outer circumferential surface. Therefore, press-fitting resistance when the disc hub is press fitted to an end of the shaft member can be reduced.

Abstract: A MacPherson strut tube having an upper spring seat, a spring, a strut tube, and a ring bearing disposed for engaging the spring seat, the spring and the strut tube. The ring bearing comprises an upper casing, a lower casing, and a plastic ring engaged between the upper and lower casings, thereby forming said ring bearing.

Abstract: A dynamic pressure generation portion is formed on the outer circumferential surface 2a1 of a shaft portion 2a. This allows for forming a bearing member 7 into which a housing and a sleeve-shaped member that were conventionally separately configured due to the machinability of the dynamic pressure generation portion are integrated. The opening at one end of the bearing member 7 is sealed with a cover member 8 integrated with the bearing member 7 or with a separate cover member 8 secured to the bearing member 7.

Abstract: Disclosed herein are a rotary atomizer and an air bearing protection system for the rotary atomizer. The structure of the system is simplified to reduce the manufacturing cost. An air bearing is used to enable high-speed rotation along with savings in the maintenance and repair cost. Compressed air can be temporarily supplied at emergency such as interruption of the compressed air. Thus the stability and durability of the entire system are improved, such as prevention of air bearing failure.

Abstract: In order to prevent degradation of accuracy and decrease of strength when a hydrodynamic bearing device is assembled and to reduce a cost of the hydrodynamic bearing device, a guide face 2c serving as a guide when a disc hub 3 is press fitted into a shaft member 2 is formed on the shaft member 2. Then, the guide face 2c, an outer circumferential surface 2a3 of the shaft member 2 adjacent to the guide face 2c, and a boundary portion between the guide face 2c and the outer circumferential surface 2a3 are ground simultaneously, thereby forming a blunting portion 2d having a radius r in the boundary portion. Thus, no edge remains between the guide face 2c and the outer circumferential surface 2a3. Therefore, press-fitting resistance when the disc hub is press fitted to an end of the shaft member 2 can be reduced.

Abstract: A primer is applied to a radially outer surface of a sleeve unit, and an adhesive is applied to an inner circumferential surface of a base defining a through hole in the base prior to the sleeve unit is inserted into the through hole. The sleeve unit includes a flange portion extending over entire circumference of the sleeve unit. The flange portion is used as a mark for applying the primer to the radially outer surface of the sleeve unit, and prevents the primer from flowing along the radially outer surface and entering into a bearing mechanism of the motor. Through the configuration, a base and a sleeve unit are firmly fixed to each other without degrading a bearing characteristic.

Abstract: The motor has a thrust cap fitted to its end cap by snap fit fingers. The thrust cap closes a hole in the bearing retainer of the end cap and provides a thrust bearing surface against which the end of the shaft contacts to limit axial movement or end play of the shaft. The thrust bearing surface is part of a metallic spring fixed to a body of the thrust cap.

Abstract: A MacPherson strut tube having an upper spring seat, a spring, a strut tube, and a ring bearing disposed for engaging the spring seat, the spring and the strut tube. The ring bearing comprises an upper casing, a lower casing, and a plastic ring engaged between the upper and lower casings, thereby forming said ring bearing.

Abstract: The motor has a thrust cap (50) fitted to its end cap by snap fit fingers (54). The thrust cap (50) closes a hole (46) in the bearing retainer (42) of the end cap and provides a thrust bearing surface (52) against which the end of the shaft contacts to limit axial movement or end play of the shaft.

Abstract: Play-free and centering tube coupling for the spindle of a textile machine, which includes at least three driving elements which are centrically arranged to bear against an inner wall of the tube in a tube receptacle connected nonpositively to the spindle shank. The tube receptacle includes a basic body having a thrust piece arranged axially moveably therein and an end piece fixedly connected to the basic body. The driving elements are designed as driving elements and arranged so as to be movable predominantly radially between the basic body and the thrust piece. Guide slopes are in contact with the driving elements and are in the form of a conically designed collar are arranged on the thrust piece, and detaining centrifugal elements displaceable predominantly radially are arranged between the thrust piece and the end piece. At least one of the faces of the thrust piece and of the end piece which are in contact with the detaining centrifugal elements is designed as a guide slope.

Abstract: In the case of a spindle for spinning or twisting machines, two housings, separated by an annular gap, are provided, namely an outer housing, secured to a spindle rail, and an inner housing which takes up the neck bearing and the step bearing for the shaft by means of supporting parts. The inner housing is connected to a supporting portion by a flexible joining piece, which supporting portion is adjustable and clampable onto the bottom surface of the outer housing. The bottom surface takes at least approximately the shape of a ball cup, whose center point is at most 30 mm away from the upper edge of the outer housing in vertical direction.

Abstract: A spindle for spinning or twisting machines comprises a rigid inner sleeve which contains a neck bearing and a step bearing for a rotatably supported shaft and which inner sleeve is accommodated in a bearing housing, the bearing housing being fixed to a spindle rail. The inner sleeve is supported against the bearing housing by two radially symmetrical acting metal springs. The spring rate of the metal spring which faces the neck bearing amounts to at least five times and at most twenty times the spring rate of the metal spring facing the step bearing. The ring space between the inner sleeve and the bearing housing is filled with a highly viscous fluid. The inner sleeve is closed off against the ring space with an oilproof seal.

Abstract: A machine tool spindle is supported at its spindle nose in a front, rolling element mechanical anti-friction thrust and radial support bearing means. The middle and rear end of the spindle is supported in a magnetic radial rear bearing and further supported at a generally mid-position of the spindle by magnetic radial mid bearing. The two magnetic radial bearings provide radial suspension of the spindle and permit the spindle to slide freely. A spindle flange is axially forced by a magnetic axial thrust bearing to vary the pre-load of the mechanical anti-friction thrust and radial support bearing.

Abstract: A high-speed drilling or milling spindle (10) comprises a stator (11) that can be attached to a machine tool (12), a rotor (13), and a rotary drive (40, 41) acting between stator (11) and rotor (13). The rotor (13) has a receptacle (15) for a rotating, metal-cutting tool (16). The rotor (13) is supported with respect to the stator (11) by means of at least a first and a second rolling bearing (22, 32) spaced axially away therefrom. The rotor (13) is supported on thrust and radial bearings. The rolling bearings (22, 32) have a very small thrust angle (24, 34). They essentially act as radial bearings. A third bearing is provided as the thrust bearing in the form of a magnetic bearing (50). The magnetic bearing (50) is adjustable in terms of its axial bearing force as a function of the axial forces (F.sub.a) acting on the tool (16).

Abstract: The spindle has a sleeve about a fixed shaft. Swing-type bearing pads are attached to the fixed shaft. The bearing pads are lubricated by flowing a lubricant through primary and secondary lubricating holes located in the fixed shaft.

Abstract: A low-noise (low "rumble") segmented bearing for high-fidelity phonograph turntables and the like. In a preferred belt-driven form, the bearing consists of four small, spaced polyurethane pads disposed so that the tension of the belt keeps the shaft in contact with all of them. A fifth pad supports the end of the shaft. The bearing is immersed in lubricant.

Abstract: A device for supporting the spindles of textile machines, in which a spindle support cartridge is radially held by means of a double system of elastically-yielding thrust members, disposed inside an outer casing for the cartridge, and radially acting on the cartridge itself.

Abstract: A thrust bearing assembly is provided which reduces initial axial loading on a shaft's thrust bearing in order to correspondingly reduce the required torque for rotational start-up. The shaft's bearing runner is forced in a direction away from its associated thrust bearing during initial start-up procedures by a suitable means for imparting a force on the bearing runner in a direction away from the thrust bearing. The force is provided by a piston and cylinder combination, in the preferred embodiment, which provides an axial force in a direction opposing the initial shaft loading force. An anti-friction guide bearing is used to transfer this force from the piston to the shaft and, in turn, to the bearing runner.