Abstract: A differential gear includes a differential casing having a first differential case portion that defines a first output shaft opening and a second differential case portion that defines a second output shaft opening. The first differential case portion can include an annular pocket formed thereon and defined by an outer circumferential wall, an inner circumferential wall and an end wall. A piston can be slidably disposed in the annular pocket and configured to actuate a clutch assembly. A first and a second side gear can be rotatably mounted within the differential casing. The first and second side gears can be co-axially aligned along an axis of rotation of the differential casing.

Abstract: A vehicle transmission includes a first transmission mechanism arranged to transmit mechanical driving power from an output shaft of the prime mover to a first input shaft and to put any one of a first set of gears in an engaged state to drivingly connect the first input shaft to the driving wheels; and a second transmission mechanism arranged to transmit mechanical driving power from the output shaft of the prime mover to a second input shaft and to put any one of a second set of gears in an engaged state to drivingly connect the second input shaft to the driving wheels. Controllable first and second clutch units are arranged to bring the output shaft of the prime mover and the first and the input shaft, respectively, into engagement with each other. A lubrication pump is drivingly connected to the first input shaft to lubricate the transmission and an electronic control unit is arranged to determine a lubricated state of the transmission and the operational state of the lubrication pump.

Abstract: The system comprises an oil pump driven in conjunction with an output shaft of a transmission, a first oil path for supplying oil discharged from the oil pump to a lubrication system of the transmission, a second oil path arranged in parallel with the first oil path to guide the oil from the oil pump to a heat exchanger, and a valve inserted on an upstream side of the heat exchanger in the second oil path. The valve opens at a first set pressure to conduct the oil from the oil pump to the second oil path. The oil is supplied to the first oil path in a low vehicle speed area below the first set pressure, so that oil supply necessary for the lubrication system can be ensured. The oil is supplied to the second oil path in a high vehicle speed area over the first set pressure.

Abstract: A power transmitting component with a housing, a pinion rotatably disposed in the housing, a flange and a retainer. The pinion has a stem that defines male threads and a plurality of first teeth that intersect the male threads. The flange has an internal aperture that defines female threads, a plurality of second teeth. The female threads are threadably engaged with the male threads. The retainer is insert molded between the stem and the flange and includes a body, a plurality of third teeth, a plurality of fourth teeth and a retainer member. The third teeth extend from the body and engage the first teeth. The fourth teeth extend from the body and engage the second teeth. The retainer member is engaged to one of the flange and the stem. A method for coupling a flange to a stem is also provided.

Abstract: The present disclosure provides a lubricating system for a dual splined hollow shaft. A fluid dam is formed circumferentially within the hollow shaft to control the lubrication of the dual splines. The fluid dam includes a pair of sidewalls extending radially inward from the inner wall of the hollow shaft to a height defined by a top wall. A channel formed through the pair of sidewalls permits the movement of lubricant between splines of the hollow shaft. An egress port extends from the top wall of the dam through the outer wall of the hollow shaft to permit lubricant to exit the hollow shaft.

Abstract: A helicopter is provided and includes an engine, a rotor, a gear train configured to transmit torque from the engine to the rotor such that the rotor is rotatable about an axis of rotation, a primary lubrication system, which is configured to supply the gear train with a fluid and a secondary lubrication system disposed in a gear of the gear train, including a fluid reservoir, which is configured to receive and store the fluid and to continue to supply the gear train with the fluid following a failure of the primary lubrication system.

Abstract: A pin assembly for use in a planetary gear, including a pin defining a blind bore therein, the blind bore extending axially from an opening and terminating with an end face, the pin defining an inlet bore and an outlet bore, and a plug including a substantially cylindrical body including a circular base wall and a sidewall extending from its outer perimeter, the sidewall defining an inlet recess and an outlet recess. The inlet recess and outlet recess of the plug are aligned with the inlet bore and outlet bore, respectively, of the pin when the plug is inserted in the pin.

Abstract: A reverse idler support article includes a reverse idler support body that has a disk member, a plateau and a hollow cylinder. The disk member is connected to and in facial contact with the plateau that projects from a first disk member surface and the hollow cylinder that projects from a second disk member surface to define an interior space. The disk member and the plateau have an offset hole formed therethrough that is in communication with the interior space. The offset hole is oriented offset from a central axis of the reverse idler support body which extends generally centrally through the disk member and the interior space of the hollow cylinder.

Abstract: A jet engine includes at least one oil separator, through which an air-oil volume flow can be guided out of several areas supplied with oil for separating the oil, where a device for spraying oil into the air-oil volume flow is provided. Oil can be sprayed in using the device in the area of each connection between an area supplied with oil and the oil separator and/or downstream of a combining area between at least two air-oil volume flows from two or more areas supplied with oil.

Abstract: A magnet temperature calculator estimates a magnet temperature of a rotary electric machine using at least parameters related to a transmission that is coupled to the rotary electric machine.

Abstract: A pinion bearing arrangement of a gearbox for a vehicle or aircraft, providing at least one roller bearing. At least one of the roller bearings is a ball bearing, having an inner ring and an outer ring, wherein both rings have raceways for balls being located between the rings. To ensure a sufficient lifetime of the roller bearings the invention includes that at least one of the rings is made from a ball bearing steel produced by a powder metallurgical process using a powder metallurgy component including 0.5 to 2.0 weight-% C, a maximum of 0.035 weight-% S, 3.0 to 5.0 weight-% Cr, 1.0 to 4.0 weight-% V, 1.0 to 12.0 weight-% W and 2.0 to 12.0 weight-% Mo, wherein at least one raceway has a radius (rI/O) and the balls have a diameter (DB) which fulfill the equation: rI/O/DB>0.53.

Abstract: A lubricating device of an automatic transmission includes a partitioning member that partitions an oil chamber, to which a lubricating oil of a first oil chamber is introduced; a second oil chamber partitioned by the partitioning member and to which lubricating oil to supply to a forward clutch is introduced; and a third oil chamber partitioned by the partitioning member and to which lubricating oil to supply to a pinion unit such as a pinion gear coupled with one engagement unit of the forward clutch is introduced; wherein a clutch oil path that introduces the lubricating oil of the first oil chamber to the second oil chamber and a pinion oil path that introduces the lubricating oil of the first oil chamber to the third oil chamber are formed in a clutch drum interposed between the first oil chamber and the oil chamber.

Abstract: The disclosure provides an improved shaft design. The design includes an elongated annular shaft body, having an outer surface and defining a hollow cavity, and a core insert disposed in the hollow cavity. The shaft body has one or more radial flow ports that align with at least one fluid conduit in the insert. A pin couples the insert to the shaft body to prevent rotation of the insert relative to the shaft body. The shaft and the insert can be of different materials, for example, such that the density of the insert is less than that of the shaft body.

Abstract: A power take-off that significantly reduces the amount of undesirable noise that is transmitted therethrough during operation includes a housing, an input mechanism, and an output mechanism. The input mechanism is disposed within the housing and is adapted to be connected to a source of rotational energy. The output mechanism is also disposed within the housing and is adapted to be connected to a driven device. The output mechanism is adapted to be rotatably driven by the input mechanism. At least one of the input mechanism and the output mechanism includes a shaft having at least one portion that is supported on the housing by a vibration damping material.

Abstract: A hydraulic pressure control apparatus includes a first pressure regulating valve for reducing an initial oil pressure (line pressure) of a working oil, a solenoid-operated valve for converting the oil pressure, which has been reduced in pressure, into a solenoid pressure, and a second pressure regulating valve for converting the line pressure of the working oil into an actuating pressure responsive to the solenoid pressure. The three valves share a single body. Further, an outlet passageway is formed along a thicknesswise direction of the body, with a relief valve being formed upwardly of the outlet passageway.

Abstract: A driving device for the hybrid vehicle includes a planetary gear mechanism; a first rotating machine coupled to a sun gear of the planetary gear mechanism; an engine coupled to a carrier of the planetary gear mechanism; a second rotating machine and a drive wheel that are coupled to a ring gear of the planetary gear mechanism; and a regulating mechanism that regulates rotation of the carrier, wherein the driving device has a first driving region that allows executing a dual-drive mode that causes running using the first rotating machine and the second rotating machine as power sources, and a second driving region that allows executing a lubrication running mode that causes the first rotating machine to rotate the engine so as to lubricate the planetary gear mechanism and causes running using the second rotating machine as a single power source.

Abstract: A transmission system may include a planetary gear set disposed on an input shaft receiving power of an engine, two input gears connected respectively to two rotation elements among three rotation elements of the planetary gear set, first and second motor/generators disposed on an intermediate shaft and a connecting shaft disposed in parallel with the input shaft, two intermediate gears connected respectively to first and second rotors of the first and second motor/generators, a brake selectively connecting the first rotor of the first motor/generator to a transmission housing, and two output gears fixedly disposed on an output shaft disposed in parallel with the intermediate shaft and transmitting power transmitted through one input gear of the two input gears and/or one intermediate gear of the two intermediate gears to a final reduction gear of a differential apparatus.

Abstract: A lubrication system (300, 400) for a transfer case (200) includes a pump (240) in fluid communication with a lubricant source (243) and a power transfer assembly as well as a valve (302, 402) positioned along a fluid flow path between the lubricant source (243) and the power transfer assembly. The valve (302, 402) includes a valve inlet (306), a first valve inlet (406), a first valve outlet (308, 408) that does not restrict flow of the lubricant along the fluid flow path in a first state, a second valve outlet (310, 410) that is operable to restrict flow of the lubricant along the fluid flow path in a second state, and a control that is operable to open the first valve outlet (308, 408) in the first state and open the second valve outlet (310, 414) in the second state.

Abstract: A lubricant supplying device used with a solid lubricant, includes a supplying member to supply lubricant taken from the solid lubricant to an object to be supplied with the lubricant, and a remaining amount detecting section to detect a remaining amount of the solid lubricant becoming below a predetermined value. A detection of the remaining amount of the solid lubricant is executed when an operation to supply the lubricant to the object to be supplied with the lubricant stops.

Abstract: A transmission lubricating structure which lubricates a transmission using a lubricating fluid, the transmission including a plurality of gear pairs each including a drive gear and a driven gear, includes a lubricating fluid feeding unit for feeding the lubricating fluid to the gears of the gear pairs; wherein the lubricating fluid feeding unit includes a plurality of injection nozzles, each of which directly injects the lubricating fluid to a tooth of the drive gear and a tooth of the driven gear, which teeth start to engage with each other.

Abstract: A high speed gearbox includes a housing which encloses a rotating gear and a volume which contains oil and air. The gear has an outer first surface exposed to the volume and has a second surface exposed to the environment. A vent arrangement includes first and second passages formed in the gear. The second passage extends axially part way into the gear and has an outer end exposed to the second surface. The first passage extends radially from the first surface to the second passage. A check valve is mounted in the second passage and permits one-way flow of air from the volume to the environment.

Abstract: A planetary gear train is lubricated via a distribution ring and a planet gear carrier oil supply passage in communication with the distribution ring. The gear train includes a sun pinion that engages a planet gear at a sun planet gear mesh. The planet gear is rotatably mounted to a planet gear carrier. The planet gear carrier is configured to drive an output shaft. The output shaft may be operatively connected to a load. The planet gear rotates within a ring gear at a planet gear ring mesh. The distribution ring surrounds a planet gear carrier and has a hollow interior that communicates with an oil supply. A planet gear carrier oil supply passage may extend through a planet gear carrier of the gear train and supply oil to a sun planet gear mesh and the planet ring gear mesh, and bearings of the planetary gear train.

Abstract: An apparatus for reducing contaminants in lubrication for a transfer case. The apparatus utilizes the tendencies of a transfer case to splash and otherwise project internal sealed lubricant in numerous directions within the case, along with gravitational forces acting on the lubricant, to passively filter and otherwise remove particulate contaminates from the lubrication. The apparatus for containing lubricated mechanical components comprising a housing and a vessel. The vessel has an open top. The vessel is located proximate an inside surface of the housing. A filter is secured to the vessel. Lubrication contained within the housing flows along an inside surface of the housing into the vessel through the open top, and further flows out of the vessel through the filter.

Abstract: An epicyclic reduction gear, for example for a turbomachine, including an internal sun gear and an external sun gear, which are coaxial, with the internal sun gear being movable in rotation about its axis, with the external sun gear being stationary. At least one planet gear is mounted to be movable in rotation on a planet carrier and meshing with both the internal sun gear and the external sun gear. The planet carrier is configured to pivot about the axis of the internal sun gear and the external sun gear, the planet gear having a cylindrical inner surface mounted to be movable in rotation around a cylindrical surface of the planet carrier. The reduction gear further includes a mechanism supplying oil at an interface between the cylindrical surfaces.

Abstract: A continuously variable transmission includes a shaft, first and second rotary members, a sun roller, a carrier, planetary balls, a gear shifter for changing a gear ratio between input and output by tilting each of the planetary balls, a casing for accommodating these elements, and a lubricating oil supply opening for supplying lubricating oil into the casing. The casing includes a discharge opening for discharging the lubricating oil to the outside of the casing. The discharge opening is provided in a wall of the casing in an axial direction of the shaft and radially outside the lubricating oil supply opening. As seen in the axial direction, the discharge opening is formed either at a position that crosses a contact section between the planetary ball and each of the first and second rotary members or an auxiliary contact section, or radially outside the contact section or the auxiliary contact section.

Abstract: Provided with a hollow piping member attached in a casing and a guide member integrally installed on an outer peripheral surface of the piping member. The guide member is structured by a plurality of surfaces including a first surface on which at least part of hydraulic fluid pumped up by a final gear is received and a second surface connected to one end of the first surface extending along a side of the final gear, and fastened to the casing by a fastener. The guide member receives hydraulic fluid pumped up by the final gear, restraining the fluid from reaching a breather mechanism and neighborhoods thereof.

Abstract: Provided is a variable-capacity oil pump capable of stably securing a required pump discharge volume and discharge pressure even with a clogged oil filter and/or an electromagnetic valve failed. The oil pump is provided with a first control chamber for applying a force under oil pressure from a main oil gallery in a direction for decreasing of the eccentricity of a cam ring, a second control chamber for applying a force under oil pressure from the oil gallery in cooperation with a spring force in a direction for increasing of the cam-ring eccentricity, a first branch flow path that connects the oil gallery and the first control chamber, and a second branch flow path branched from the first branch flow path and communicating with the second control chamber via the electromagnetic valve. Two oil filters are disposed in the oil gallery and the first branch flow path, respectively.

Abstract: A drive device for a construction machine includes a speed reduction unit reducing speed of rotational force output from a motor, the speed reduction unit has a gear mechanism provided in a casing and reducing the speed of the rotational force output from the motor, and an oil receiver arranged above the gear mechanism in the casing, the oil receiver forms a main storage space for storing the lubricant oil, and is arranged in the casing such that an oil passage for guiding a rising lubricant oil to the main storage space is formed between an outer surface of the oil receiver and an inner wall surface of the casing, the oil receiver is provided with an oil drain opening, the oil drain opening designed to gradually discharge the lubricant oil stored in the main storage space toward the gear mechanism through the oil drain opening.

Abstract: A saddle-type vehicle that allows an oil pressure adjusting system for a hydraulic clutch to be optimally disposed in a power unit in which a crankshaft is disposed along the vehicle body front-rear direction. A crankshaft of an engine is disposed along the vehicle front-rear direction. An oil pressure adjusting system that operates hydraulic clutches is attached to a clutch cover of a power unit. The oil pressure adjusting system is disposed so as to overlap with the hydraulic clutches as viewed in the axial direction of the crankshaft.

Abstract: A lubricant pump assembly for use with a power distribution unit for a vehicle, comprising a pump, a first rotating component, a second rotating component, and a lubricant. The pump has an inlet and an outlet. The inlet and the outlet are in fluid communication with a housing of the power distribution unit. The first rotating component is disposed in the housing of the power distribution unit. The second rotating component is disposed in the housing of the power distribution unit adjacent the first rotating component. The lubricant is disposed within the housing of the power distribution unit. The pump transfers a portion of the lubricant from the inlet to the outlet. The outlet is disposed adjacent the first rotating component and the second rotating component to dispose a portion of the lubricant therebetween.

Abstract: A support housing for a turbocharger is provided. The support housing may include an end wall with a first side and a second side, and a protrusion extending from the first side of the end wall in a first direction and configured to receive the turbocharger. The support housing may also include a plurality of side walls extending from the second side of the end wall in a second direction opposite the first direction. The plurality of side walls together with the end wall may form a generally hollow enclosure. The support housing may also include a first mounting flange disposed at distal edges of the plurality of side walls and configured to engage an engine, and a first center opening disposed in the end wall and passing from the first side to the second side.

Abstract: A hydraulic pressure control apparatus includes a first pressure regulating valve for reducing an initial oil pressure of a working oil introduced from an inlet port, a solenoid-operated valve, and a second pressure regulating valve for converting the initial oil pressure of the working oil into an actuating pressure. The three valves share a single body. A joining boss and a relief valve, which is operable to release the working oil out of a passage in the body when the pressure of the working oil in the passage becomes equal to or greater than a predetermined threshold value, are arranged on a closed end face of the body. The joining boss and the relief valve have respective upper surfaces that are covered by a cover.

Abstract: A spindle drive (1), in particular for a linear actuator, having a spindle (3), a spindle nut (7) which interacts with the spindle (3), and a lubricating channel outlet (20) which opens into an intermediate space between the spindle (3) and the spindle nut (7) for lubricating the spindle (3) and the spindle nut (7), the spindle drive (1) comprising, moreover, a stationary channel system and a rotatable channel system which is connected to the stationary channel system for feeding lubricant to the lubricating channel outlet (20).

Abstract: A worm reduction gear that reduces a rotation of a worm and transmits the reduced rotation to a worm wheel includes a casing that houses the worm and the worm wheel, wherein the casing includes: a wheel opposing surface that opposes an end surface of the worm wheel via an interval; and a grease holding recessed portion formed in a recessed shape in the wheel opposing surface, and the grease holding recessed portion is provided in a position opposing a worm meshing portion between the worm and the worm wheel.

Abstract: An axle assembly and method for assembling such axle assembly for a vehicle are disclosed. The axle assembly may comprise meshed ring and pinion gears, a center housing portion, and left and right leg housing portions. The center housing portion may include a center housing defining a center cavity in which the bevel gear is disposed, and at least one channel having an entrance port into the center cavity. The axle assembly may include a first conduit configured to branch off of the first channel in a first direction and a second conduit configured to branch off of the first channel in a second direction. Such channels and conduits may be integral to the center housing or substantially external to the center housing.

Abstract: A method for controlling lubrication of a gear unit, where the lubrication method of the gear unit is changed between circulating lubrication and splash lubrication during operation of the gear unit, wherein the temperature of the lubrication fluid is measured, and the change between circulation lubrication and splash lubrication is based on the measured temperature of the lubrication fluid. The invention also relates to such a gear unit.

Abstract: An axle assembly for a vehicle includes an axle housing assembly having a carrier housing and a differential assembly mounted in the carrier housing for rotation about a rotational axis. In an exemplary implementation, the differential assembly includes a unitary differential case, a differential gear set and a shroud member. The differential case defines an interior cavity and a window having an outer perimeter, where the window is configured to provide access to the interior cavity for assembling the gear set into the interior cavity. The shroud member is configured to be removably coupled to the differential case to cover the window and provide a radiused contour aligning with a radiused contour of the differential case thereby reducing spin losses when the differential assembly is rotating relative to the axle housing assembly.

Abstract: A sealing device for a chamber including at least one rotary member and at least one static member of a jet engine and can contain a lubricating oil droplet suspension. The sealing device includes at least one brush seal that includes juxtaposed strands and is set to ensure sealing between at least one rotary member and at least one stationary member, a mechanism to recover part of the oil suspended within the inner space of the chamber, and a mechanism to deliver the recovered oil. The delivery mechanism is set up to generate a flow of oil along the strands of the brush seal, the oil flow being oriented in the direction of the rotary member. The brush seal thus provides better resistance to coking.

Abstract: A driving force transmission apparatus including a tank which reserves lubricating oil in an accommodating space which is interposed between a housing and an inner shaft and an apparatus case which has a cylindrical accommodating portion which accommodates the housing, and in the case, the accommodating portion has an inner circumferential surface which faces an outer circumferential surface of the housing, and the tank has an oil inlet port which is opened to the inner circumferential surface of the accommodating portion and through which the lubricating oil in the accommodating space is let in based on a centrifugal force generated in association with the rotation of the housing when a four-wheel drive vehicle travels forwards in a two-wheel drive mode.

Abstract: An arrangement of an oil pump (8) and its drive in a transmission (1) that has a transmission housing (2) and at least one transmission shaft (3). The oil pump (8) is arranged coaxially with the at least one transmission shaft (3). The oil pump (8) is arranged on and can be driven by the at least one transmission shaft (3).

Abstract: A lubricant flow suppressor positioned proximate a rotating component for receiving ejected lubricant therefrom and reducing the kinetic energy of the ejected lubricant. The suppressor includes at least two perforated walls with a lubricant flow path formed therebetween.

Abstract: An inclined surface inclined such that a portion thereof farther away from an oil injection port becomes lower is formed in an inner wall of an oil reservoir which faces a tip end of an oil injection gun to be inserted into the injection port, such that oil to be discharged by the injection gun is guided by the inclined surface toward a bottom portion of the reservoir. Accordingly, the oil to be discharged by the injection gun is prevented from splashing back from the inner wall of the reservoir, which faces the tip end of the injection gun, and blowing back out from the injection port in a simple structure, and smooth oil injection work is thereby enabled. Additionally, it is possible to prevent a situation where a worker erroneously recognizes that the injection work of the oil is completed, and an amount of the injected oil is insufficient.

Abstract: A lubrication device for a hybrid vehicle power transmission device including a gear member, a first electric motor, and a second electric motor within a transaxle case, the lubrication device includes: a first pipe supplying oil forcibly transferred from an oil pump to the second electric motor; an oil passage branched from the first pipe; a first catch tank supplied with oil from the oil passage; a second pipe connected to the first catch tank to supply oil accumulated in the first catch tank to the first electric motor; an oil flow outlet disposed in the first catch tank and located above the second pipe; and a second catch tank disposed vertically beneath the first catch tank to receive oil outflowing from the oil flow outlet.

Abstract: METHOD AND DEVICE FOR PREVENTING EXCESSIVE WEAR IN GEARS, involving lubricating the contact point between the wheels (1) of a gear (2), injecting lubricant into said point via parts (3) housed in the notches (4) that determine the spaces between teeth (5), via a system of channels with a lateral opening provided in said parts (3). The width (a) and thickness (b) of the parts (3) coincide respectively with the width of the bottom of the valley of the notch (4) and with the space between the surface of the crest (7) of the engaging tooth (5) and that of the valley of the notch (4) which houses it. The parts (3) have through-holes (8) connected to longitudinal channels (9) that, at one of the ends thereof, meet in a laterally open notch (10). The same system that lubricates the rest of the gear assembly is used to inject the lubricant.

Abstract: An opening end of an inboard section includes: an end surface composed of a plane positioned farthest from the center of a differential device in the axial direction and perpendicular to the axial direction; a ledge positioned adjacent to the end surface in the circumferential direction of the opening end and closer to the center than the end surface in the axial direction; and a tapered section in a slope shape formed continuing to the inner diameter side of the ledge at the opening end, slanting toward the inner diameter side of the opening end and approaching the center. Lubricating oil supplied to the opening end of the inboard section flows to the tapered section via the ledge and flows from the tapered section into a spiral groove formed on an inner periphery of the inboard section.

Abstract: A lubrication structure is provided for supplying lubricating oil to a transmission of an engine. The engine includes a mission holder which includes a power transmission mechanism between a main shaft and a countershaft as a unit and is removably mounted in a mission chamber, and a clutch chamber having a clutch mechanism is provided adjacent the mission chamber for transmitting rotation of a crankshaft to the transmission. Two oil introduction ports are provided on the mission holder, which is between the clutch chamber and the mission chamber. The two oil introduction ports enable the two chambers to communicate with each other. Each of the oil introduction ports has an opening provided therein which opens upwardly on a clutch chamber side of the mission holder.

Abstract: A lubrication system for a gear system for a wind turbine is disclosed. The lubrication system comprises a reservoir adapted to contain lubricant, first pump means arranged to supply lubricant from the reservoir to the gear system via a first fluid connection, and vacuum generating means arranged in fluid connection with the reservoir, thereby maintaining a total air pressure in the reservoir which is lower than an ambient pressure during normal operation. The lowered total air pressure in the reservoir draws lubricant from the gear system into the reservoir, thereby increasing the lubricant level in the reservoir and decreasing the lubricant level in the gear system, allowing the lubrication system to be operated in a ‘dry sump mode’. In the case of an emergency or during start-up the vacuum generating means is stopped, thereby increasing the total air pressure in the reservoir.

Abstract: A gear train lubricating device configured to supply lubricating oil OL to a gear included in a gear train is provided. The gear train lubricating device includes: a shroud covering, among components constituting the gear, at least teeth of the gear; and a lubricating oil supply port through which the lubricating oil OL is supplied to a meshing position of the gear. The shroud has an outlet port formed therein, through which the supplied lubricating oil OL is discharged. The outlet port is formed in a portion of the shroud that is positioned radially outward from the gear, such that the outlet port is disposed at an angular position that is 90°±15° forward from the meshing position in a rotation direction R1 of the gear.

Abstract: A shaft assembly includes a gear with a gear bore having a splined bore section adjacent to an oil dam. A shaft includes a first splined end section and a second splined end section, the first splined end section engageable with the splined inner diameter, the shaft having a bore with a bore diameter greater than a diameter of the oil dam, a first set of radial apertures axially inboard of the first splined end section in communication with the shaft inner bore and a second set of radial apertures axially inboard of the second splined end section in communication with the shaft inner bore that altogether provide lubrication of the splined end sections.

Abstract: The disclosed embodiments include self-lubricating oil feed systems that may include an integral bearing. The oil feed systems may include gear pumps suitable to minimize the axial profile of the oil feed systems. Additionally, the oil feed systems may be directly coupled to turbomachinery having a gear, and provide for mechanical support and lubrication of certain components of the turbomachinery. In certain embodiments, the oil feed systems enables the transfer of a lubrication fluid to the bearing during operations of the turbomachinery.