An oil supply device includes an oil pump and an oil control valve. The oil control valve is connected to a control oil chamber of the oil pump via a control oil passage that includes an oil descent passage and an oil rise passage. One end of the oil descent passage on the control oil chamber side is disposed at a position closer to a bottom of the vehicle than the other end on the oil control valve side. The oil rise passage is disposed at a position closer to the control oil chamber side than the oil descent passage. One end of the oil rise passage on the control oil chamber side is disposed at a position closer to a top of the vehicle than the other end on the oil control valve side.

An oil supply device includes an oil pump and an oil control valve. The oil control valve is connected to a control oil chamber of the oil pump via a control oil passage that includes an oil descent passage and an oil rise passage. One end of the oil descent passage on the control oil chamber side is disposed at a position closer to a bottom of the vehicle than the other end on the oil control valve side. The oil rise passage is disposed at a position closer to the control oil chamber side than the oil descent passage. One end of the oil rise passage on the control oil chamber side is disposed at a position closer to a top of the vehicle than the other end on the oil control valve side.

A feed system for feeding lubricating oil to members of a turbine engine including a reduction gearbox, the feed system including a nonpositive-displacement pump device for connecting upstream to an oil tank and driven in rotation at a speed that is not correlated with an operating speed of the turbine engine; a separator node connected to the outlet of the nonpositive-displacement pump device; a first delivery branch for lubricating the RGB connected to the nonpositive-displacement pump device via the separator node; a second delivery branch for lubricating other members connected to the nonpositive-displacement pump device via the separator node, the second delivery branch including a positive-displacement pump; and at least one fluid metering device having a metering slot fed by the nonpositive-displacement pump device via the separator node for the purpose of feeding the RGB.

A feed system for feeding lubricating oil to members of a turbine engine including a reduction gearbox, the feed system including a nonpositive-displacement pump device for connecting upstream to an oil tank and driven in rotation at a speed that is not correlated with an operating speed of the turbine engine; a separator node connected to the outlet of the nonpositive-displacement pump device; a first delivery branch for lubricating the RGB connected to the nonpositive-displacement pump device via the separator node; a second delivery branch for lubricating other members connected to the nonpositive-displacement pump device via the separator node, the second delivery branch including a positive-displacement pump; and at least one fluid metering device having a metering slot fed by the nonpositive-displacement pump device via the separator node for the purpose of feeding the RGB.

A powertrain component (21, 22, 23) for a wind turbine (100) is provided, comprising a powertrain component housing (20) with at least one rotating part (49) and a dry sump 5 lubrication system for lubricating the rotating part (49). The lubrication system comprises a dry sump lubricant tank (51, 52, 53) and a pump (60) for pumping the lubricant from the tank (51, 52, 53) towards a lubricant release point, the lubricant release point being provided at a level above at least part of the rotating part (49) for receiving the lubricant from the tank (51, 52, 53) and allowing the lubricant to lubricate the rotating part (49). 10 The tank (51, 52, 53) is integrated in or directly attached to the powertrain component housing (20) at a level below the at least one rotating part (49).

A powertrain component (21, 22, 23) for a wind turbine (100) is provided, comprising a powertrain component housing (20) with at least one rotating part (49) and a dry sump 5 lubrication system for lubricating the rotating part (49). The lubrication system comprises a dry sump lubricant tank (51, 52, 53) and a pump (60) for pumping the lubricant from the tank (51, 52, 53) towards a lubricant release point, the lubricant release point being provided at a level above at least part of the rotating part (49) for receiving the lubricant from the tank (51, 52, 53) and allowing the lubricant to lubricate the rotating part (49). 10 The tank (51, 52, 53) is integrated in or directly attached to the powertrain component housing (20) at a level below the at least one rotating part (49).

A drive device includes a rotor, a stator, a housing including an accommodation portion to store oil, and a pump driven through a motor shaft. The pump includes an external gear fixed to an end on one side in an axial direction of the motor shaft, an internal gear surrounding a radial outside of the external gear and meshing with the external gear, a pump room accommodating the internal gear and the external gear, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The housing includes an outer lid in which the pump room is provided. The outer lid includes a shaft insertion hole that penetrates the outer lid from a surface on the other side in the axial direction of the pump room to a surface on the other side in the axial direction of the outer lid, the motor shaft being inserted into the shaft insertion hole, and a support defining at least a portion of the surface on the other side in the axial direction of the pump room and at least a portion of a radially inside surface of the shaft insertion hole. The support journals the motor shaft on the radial outside of the motor shaft.

A drive device includes a rotor, a stator, a housing including an accommodation portion to store oil, and a pump driven through a motor shaft. The pump includes an external gear fixed to an end on one side in an axial direction of the motor shaft, an internal gear surrounding a radial outside of the external gear and meshing with the external gear, a pump room accommodating the internal gear and the external gear, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The housing includes an outer lid in which the pump room is provided. The outer lid includes a shaft insertion hole that penetrates the outer lid from a surface on the other side in the axial direction of the pump room to a surface on the other side in the axial direction of the outer lid, the motor shaft being inserted into the shaft insertion hole, and a support defining at least a portion of the surface on the other side in the axial direction of the pump room and at least a portion of a radially inside surface of the shaft insertion hole. The support journals the motor shaft on the radial outside of the motor shaft.

An axle assembly having an axle housing with a center portion defining a sump and one or more axle shaft housings extending from the center portion. Each of the axle shaft housings receives an axle half shaft. The axle housing includes a differential assembly having a ring gear; and a lubrication directing assembly disposed directly adjacent to the ring gear. The axle assembly also includes a pump mounted in one or more of the axle shaft housings and is drivingly coupled to a pump gear. The pump gear is drivingly coupled to the axle half shaft. The axle assembly also includes an axle housing cover surrounding the axle housing. A fluid storage tank is attached to the housing cover, wherein the fluid storage tank includes a fill channel directly attached to the housing cover.

An axle assembly having an axle housing with a center portion defining a sump and one or more axle shaft housings extending from the center portion. Each of the axle shaft housings receives an axle half shaft. The axle housing includes a differential assembly having a ring gear; and a lubrication directing assembly disposed directly adjacent to the ring gear. The axle assembly also includes a pump mounted in one or more of the axle shaft housings and is drivingly coupled to a pump gear. The pump gear is drivingly coupled to the axle half shaft. The axle assembly also includes an axle housing cover surrounding the axle housing. A fluid storage tank is attached to the housing cover, wherein the fluid storage tank includes a fill channel directly attached to the housing cover.