Abstract: The purpose of the present invention is to provide: a turbo compressor which is provided with an open impeller and has the minimal gap between the shroud and the impeller such that efficiency is improved and the safe operating region is enlarged; and a turbo chiller using the same. The turbo compressor is provided with an open impeller with a shroud provided on the side of a casing, and the rotary shaft is supported by a radial magnetic bearing and a magnetic thrust bearing. The turbo compressor is provided with a control unit that comprises: a load calculating means that calculates the axial thrust load generated by the pressure distribution of the compressor; and an axial support position control means that controls a gap between the impeller and the shroud to be a target gap by varying, on the basis of the axial thrust load, the axial support position of the rotary shaft due to the magnetic thrust bearing.

Abstract: A device for influencing the temperatures in inner ring segments of a gas turbine is provided, which includes in the circumferential direction of the gas turbine, at least one outer shell assembly having a plurality of outer ring segments and at least one inner shell assembly having a plurality of inner ring segments. The inner ring segments are equal to or greater in number than the outer ring segments. An outer ring segment gap is between each two adjacent outer ring segments. An inner ring segment gap is between each two adjacent inner ring segments. An outer ring segment gap, or at least a radial cooling air passage, is located opposite each inner ring segment gap in the radial direction of the gas turbine.

Abstract: A shaft has an axis, an outer surface, an inner surface and is arranged to rotate in a first circumferential direction. The shaft comprises a first set of equally circumferentially spaced apertures extending through the shaft between the outer and inner surfaces of the shaft. A second set of equally circumferentially spaced apertures extends through the shaft between the outer and inner surfaces of the shaft. The first and second sets of apertures are arranged in first and second planes arranged perpendicularly to the axis of the shaft. The second plane is spaced axially downstream from the first plane. Each aperture in the second set of apertures is circumferentially displaced in a second circumferential direction from a circumferential mid position between the two apertures in the first set of apertures to reduce the stresses in the shaft.

Abstract: A gas turbine having a combustion chamber with exhaust section through which combustion gas is exhaustable, plenum chamber and compressor are provided. The plenum chamber is coupled to the compressor wherein a first quantity of compressed fluid is injectable therein at a radially inner wall of the plenum chamber. A guide vane section with at least one airfoil is coupled to the exhaust section so combustion gas is flowable against the airfoil. The exhaust section and guide vane section are housed inside the plenum chamber. The airfoil has a first flow chamber where a second quantity of compressed fluid is flowable through the guide vane section from the compressor in the direction from the inner wall to a outer wall of the plenum chamber before being discharged. The second quantity of compressed fluid streamable through the guide vane section is larger than the first quantity of the compressed fluid.

Abstract: One embodiment of the present invention is a unique gas turbine engine. Another embodiment of the present invention is a gas turbine engine having a unique secondary air flow circuit. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for gas turbine engines and secondary air flow circuits. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.

Abstract: Cooling-enhanced bearing assemblies, apparatuses, and motor assemblies using the same are disclosed. In an embodiment, a bearing assembly may include a plurality of superhard bearing elements distributed circumferentially about an axis. Each of the superhard bearing elements may have a bearing surface. The bearing assembly may further include a support ring that carries the plurality of superhard bearing elements. The support ring may include at least an upper surface, an inner surface, and an outer surface. A plurality of cooling features may be arranged on at least one of the upper surface, the inner surface, or the outer surface of the support ring.

Abstract: Cooling-enhanced bearing assemblies, apparatuses, and motor assemblies using the same are disclosed. In an embodiment, a bearing assembly may include a plurality of superhard bearing elements distributed circumferentially about an axis. Each of the superhard bearing elements may have a bearing surface. The bearing assembly may further include a support ring that carries the plurality of superhard bearing elements. The support ring may include at least an upper surface, an inner surface, and an outer surface. A plurality of cooling features may be arranged on at least one of the upper surface, the inner surface, or the outer surface of the support ring.

Abstract: In a journal bearing device having an upper bearing liner, a lower bearing liner, an upper base metal and a lower base metal, the lower bearing liner is divided into a sliding portion having a sliding surface and a clearance portion provided with a space between the lower bearing liner and a rotor, and is provided with an oil path formed on a back side of the sliding portion and extending from a border portion between the sliding portion and the clearance portion toward an upstream side in the rotational direction of the rotor, and an oil supply hole extending from an upstream end portion of the oil path to the sliding surface, and the lower base metal has an oil supply path and extending from an outer circumferential side of the lower base metal to the oil path at the border portion.

Abstract: A bearing housing (1) of an exhaust-gas turbocharger, having a compressor-side housing flange (2), a central housing section (3) which is integrally connected to the housing flange (2) and in which is arranged a first partial section (4) of an oil chamber (5) which has an oil inlet (20) and an oil outlet (21), and a turbine-side housing section (6) which has a turbine-side housing flange (7) and in which is arranged a second partial section (8) of the oil chamber (5). The central and turbine-side housing sections (3, 6) are provided with an oil cooling duct (13; 13?).

Abstract: A guitar having a tremolo device with tonal stability is provided.

Abstract: A heavy load bearing includes a casing and assembly having at least two units and an axial hole run-through by a shaft. Each unit has a mounting portion on the circumferential outer surface, two connection portions at two ends, an axle hole, and at least one groove indented axially from the connection portion and formed between an outer wall near the mounting portion and an inner wall near the axle hole. At least one set of multiple notches is formed annularly on a free end of the inner wall and communicating with the groove and axle hole. The casing has an axial cavity to hold the assembly. Two abutting units are coupled to form at least one storage chamber to store lubricating media. The notches of the two abutting units form at least one set of multiple fine flow passages communicating with the axial hole and storage chamber.

Abstract: A bearing includes a housing and an assembly which consists of at least two elements. Each element has an axle hole to form an axial hole of the assembly run through by a shaft. At least one element has at least one set of multiple notches formed thereon directing towards at least one of two ends thereof to communicate with the axle hole, and at least one groove with an enlarged opening formed on the wall surface of the axle hole directing towards the notches. The groove on the wall surface of the axle hole has at least one set of multiple recesses formed thereon. The housing has a through axial cavity to house the assembly. The bearing has at least one storage chamber to store lubricating media. The notches on at least one set of adjacent elements form at least one set of multiple passages communicating with the storage chamber and the axial hole.

Abstract: A hybrid lubricating module includes a housing and an assembly which consists of at least two elements and has an axial hole run through by a shaft. At least one of the elements has one set of multiple notches on one end surface communicating with an axle hole. The housing has a through axial cavity to encase the assembly. An outer wall surface of the assembly and an inner wall surface of the housing are assembled to each other to form at least one storage chamber to store lubricating media. Multiple notches on at least one adjacent element form at least one set of passages communicating with the axial hole and the at least one storage chamber.

Abstract: An increase in the temperature of a sliding bearing can be suppressed, and it is possible to reduce the temperature of the bearing and prevent burning and damage. The bearing is divided in two and composed of a liner and a base metal. The liner is disposed on an inner circumferential side of the bearing, and the base metal is disposed on an outer circumferential side of the bearing. A lower liner of the bearing liner, which is located on a load-receiving side, has a cooling groove formed in an outer circumferential surface thereof and extending along a circumferential direction thereof. A lubricant is cooled in the cooling groove and supplied to reduce the temperature of a shaft-sliding surface of the bearing. The lubricant is supplied to the bearing, increases in temperature due to the cooling and has low viscosity.

Abstract: Certain exemplary embodiments comprise a system for cooling bearing of a shaft of a motor, comprising: an oil sump adapted to collect oil that contacts a bearing enclosed within the sump; and a heat exchanger physically separated from the sump and the bearing, the heat exchanger adapted to be in fluid communication with the sump and the bearing.

Abstract: A roller device, which includes a right bearing housing, a left bearing housing and a roller, which is rotatably supported by journals in the bearing housings in continuous casting plants. A cooling medium is passed through an axial bore in the roller, and bores, which form a closed cavity, are arranged around the bearings mounted in each of the bearing housings. A cooling medium inlet is provided in a first of the bearing housings, and a discharge bore for the cooling medium, which is arranged on the end face of a second of the bearing housings, is located next to the bearing cover so that the cooling medium flows into the inlet in the first bearing housing, through the axial bore in the roller and out the discharge bore in the second bearing housing.

Abstract: A bearing for a wellbore tool includes a flow device. The flow device may be a pump such as a positive displacement pump or a hydrodynamic pump. In arrangements, a pump stator connects to a wellbore wall. A pump rotor rotates with a drilling motor, and/or a drill string. Rotation of the pump rotor may generate a pressure differential to displace the fluid. The pump may be configured to flow fluid across a gap between a rotating section and a non-rotating section of the bearing. The fluid may be drawn from a wellbore annulus and also returned into the wellbore annulus. The bearing may support thrust loadings and/or a radial loadings. In embodiments, inserts in the bearing may be used to filter the fluid.

Abstract: Machine with bearing lubrication, including a housing (2) and a rotor (5) which is provided on a shaft (6), provided in a rotatable manner in the above-mentioned housing (2) by way of oil-lubricated bearings (7). Inside the housing (2), lubrication ducts (14) to supply and discharge oil to and from the bearings (7), and cooling channels (21, 15) to supply and discharge a cooling agent, are provided. The cooling channels (21, 15) open opposite to the shaft (6), in a place between the rotor (5) and a bearing (7).

Abstract: While a rotational die and a predetermined position of a lower mold in which the rotational die is provided can be set in a zero contact manner, operation of setting the rotational die in the predetermined position of the lower mold can be easily performed, and occurrence of problems such as insufficient rotation of the rotational die and breakage of support shafts is reduced. To realize this, in a structure of bearing for rotatably supporting, in a bearing hole, a pivot support shaft of a rotational die arranged in a press molding apparatus, an inner diameter of at least an upper side of the bearing hole with respect to a horizontal line passing through a center of the bearing hole is formed slightly larger than a diameter of the support shaft, and a space is provided between the pivot support shaft and the inner surface of the upper side of the bearing hole.

Abstract: A method of lubricating and cooling a hydrodynamic plain bearing for a rotating element comprises the steps of supplying fresh, cold lubricant under pressure from a pressure chamber arranged upstream of a fixed gliding plane to a lubricating gap between the fixed gliding plane and the rotating element, the supply of fresh, cold lubricant being so controlled that an effective lubricating wedge is formed between the rotating element and the fixed gliding plane.

Abstract: A replacement overdrive piston retainer for an automatic transmission that rotationally engages and interconnects the reverse drum within the transmission housing to the overdrive clutch assembly, which is mounted on the exterior of the housing is disclosed. An integral hub diameter formed on the present piston retainer provides a plurality of lubrication sites positioned at predetermined angular locations to deliver automatic transmission fluid to the interface of the hub diameter and the reverse drum in timed relation to the rotation of the reverse drum in an amount sufficient to maintain clearance and to minimize premature wear and galling at the interface of the components. In addition, lubrication reservoirs have been integrally formed within the hub diameter in fluid communication with the lubrication sites to improve the flow of automatic transmission fluid through the piston retainer to the mating interface of the hub diameter and the reverse drum.

Abstract: According to the invention, a lubrication element is located in a sleeve bearing and extends through the central annular surface that mates with a shaft. The lubrication element has a cool lubricating fluid aperture that leads to a cool fluid space defined by a base face that is generally tangential to the central surface and a downstream face that is generally normal to the central surface. The down stream face extends at an angle to the longitudinal axis of the sleeve bearing. The lubrication element also has an upstream face that discharges hot lubricating fluid. The upstream face also extends at an angle to the longitudinal axis of the bearing. The upstream face directs hot fluid to a side of the sleeve bearing.

Abstract: A bearing supporting a crankshaft provided in a connecting rod comprises an overlay in contact with a throw, a metal layer on the outside of the overlay and a back metal on the outside of the metal layer. The hardness of the metal layer is lower than that of the back metal, and the thermal conductivity of the overlay is higher than that of the throw. The metal layer having a lower hardness than the back metal improves the fit of the bearing with the throw, and sharp increase of frictional losses and rise of lubricating oil temperature at high engine rotation speeds are thereby prevented. The overlay having a high thermal conductivity absorbs heat from the minimum thickness oil film formed between the inner surface region of the throw and the bearing, and after the bearing has passed through the minimum thickness oil film, the absorbed heat is again discharged to the lubricating oil.

Abstract: An improved journal bearing includes a first groove, in the direction of journal rotation, formed in the inner surface of the journal bearing. The first groove extends axially along the length of the bearing and has opposed, open groove ends. A second groove, in the direction of journal rotation, is formed in the inner surface of the journal bearing. The second groove extends axially along the length of the bearing and has opposed, closed ends. An orifice is provided for supplying a lubricant to the inner surface of the journal bearing. The lubricant supply orifice is disposed substantially centrally along the bearing length and intermediate the first and second grooves.

Abstract: A flexure-controllable roll includes a hollow roll, a stationary crosshead extending lengthwise therethrough and hydrostatic support elements arranged in the clearance space between the hollow roll and crosshead. The support elements are formed with contact surfaces for abutting the inner circumference of the hollow roll. Hydrostatic bearing pockets are formed in the contact surfaces. The bearing pockets are supplied with a first pressurized fluid via throttling ports from a cylinder chamber of the support element. An additional feed line, provided in the crosshead, has a movable part that follows the movements of the support element for supplying a second pressurized fluid to the bearing pockets for regulating the temperature of the roll.

Abstract: A bearing apparatus for a rotary machine having a horizontal rotating shaft comprises a bearing for supporting the horizontal rotating shaft, a bearing box for supporting the bearing therein, a lubricating oil tank disposed in a lower portion of the bearing box for storing lubricating oil, a lubricating supply device for picking up the lubricating oil in the lubricating oil tank and supplying the lubricating oil to the bearing, and oil guide device disposed beneath the bearing and allowing the lubricating oil discharged from the bearing to flow along a side wall of the bearing box to be stored in the lubricating oil tank.

Abstract: A bearing system for a motor (10) having a housing (20) and a rotor shaft (25). The bearing system includes a first unitary bearing member (31) located proximate to a first end (17) of the motor (10), and rotatably receiving the rotor shaft (25). The first bearing member (31) has a body region (40), first and second outer radial alignment surfaces (35, 36) for aligning the body region (40) relative to the housing (20), a radial bearing surface (45) for resisting radial forces from the rotor shaft (25) and an axial bearing surface (54) for resisting axial forces in a first direction. A flange (33) secures the first bearing member (31) to the housing (20). A first bearing plate (56) is fixed to the rotor shaft (25) for rotation therewith. The first bearing plate (56) is positioned in opposition to the axial bearing surface (54) of the first bearing member (31).

Abstract: In a hydrostatic bearing apparatus, a bearing bushing is formed at its internal surface with a plurality of circumferentially separate fluid pockets, into which pressurized fluid is conducted via respective throttle elements for rotatably supporting a spindle received in the internal surface, by means of static pressure generated in each of the fluid pockets. The bearing surface is further formed with a plurality of exhaust grooves, each of which extends in the axial direction of the bearing bushing between contiguous two of the fluid pockets. Pressurized fluid cooled by a cooler device is supplied to flow along the exhaust grooves in the axial direction of the bearing bushing, so that heated pressurized fluid in each fluid pocket is prevented from being carried by rotation of the spindle into another fluid pocket circumferentially next thereto.

Abstract: The invention relates to a hydrodynamic bearing in which a pressure limiting valve is connected to the oil supply to a groove provided at the inlet zone of the bearing element. The oil pump thus can be of considerably smaller dimensions than heretofore, the energy consumption in operation is reduced, and the removal of heat is improved.