A method and system are provided for cooling a heat-exchanger in a wind turbine that has an electric generator with a cooling air flow directed therethrough. Effluent cooling air flow from the electric generator is directed into an air ejector pump and acts as motive air through the air ejector pump. Cold air is drawn into the air ejector pump by the vacuum generated by the motive air moving through the air ejector pump. The heat exchanger is disposed in-line with the cold air flow so that the cold air is drawn through the heat-exchanger, removes heat from the fluid circulated through the heat-exchanger, and becomes heated air that is combined with the motive air and discharged from the nacelle.

A planetary gearing includes at least a first planetary stage and a second planetary stage and a double-walled pipe. The double-walled pipe has an inner pipe and an outer pipe and is provided with an outlet point in a central section. A bushing is arranged on the outlet point.

A wind energy generation system includes a tower, a nacelle provided in an upper portion of the tower to be rotatable around a central axis of the tower, a hub provided in front of the nacelle to be rotatable around an axis orthogonal to the central axis, and one or more blades provided on the hub. An oil receiving portion is provided on an outer wall of the tower to protrude outward from the outer wall and encircle the outer wall around the central axis. One or more opening portions that guide the oil received by the oil receiving portion into the tower are provided at a portion of the outer wall of the tower at which the oil receiving portion is provided. In the wind energy generation system, outflow of oil to the outside from the generation system can be inhibited.

A lubrication system for a drive train of a wind turbine includes an oil reservoir having an outlet, a supply valve, a gearbox having an oil inlet and oil outlet, a drain valve and a siphon is provided. The oil reservoir is coupled to the supply valve and the supply valve is coupled to the inlet of the gearbox. The oil outlet of the gearbox is coupled to the drain valve and to a first end of the siphon. The supply valve is configured to open in an off-grid state of the wind turbine and the drain valve is configured to close in the off-grid state of the wind turbine. The siphon is configured to adjust an internal oil level in the gearbox in the off-grid state of the wind turbine.

A pneumatic motion system includes a rotating wheel, a plurality of wheel rods mounted to the rotating wheel, a plurality of main weight members respectively sleeved on the wheel rods, at least one air supply member, and a plurality of air cycle units. Each of the air cycle units is disposed at one of two opposite ends of a respective one of the wheel rods, and includes two main air compressors fluidly communicating with the at least one air supply member. For each wheel rod, when the respective one of the main weight members is moved to the one of the opposite ends of the wheel rod, each of the main air compressors is pressed by the main weight member to force air into the at least one air supply member.

A bearing lubrication structure for a wind power gearbox includes a housing, a bearing, a planet carrier, and an oil scraper assembly. The planet carrier is rotatably disposed on the housing through the bearing. A first end face of the planet carrier and a second end face of the housing form a receiving chamber. The oil scraper assembly is disposed on the second end face and is located in the receiving chamber. The oil scraper assembly includes an oil scraper member. The oil scraper member is configured to, when the planet carrier rotates, collect oil from the first end face and make the oil flow into the bearing.

A lubricant dispenser for filling a lubricant reservoir of a wind turbine is provided. The lubricant dispenser includes a carrier configured to receive a lubricant container, wherein the carrier includes at least a first and second support for supporting a first and second end of the lubricant container and. The lubricant dispenser further includes a flow connection having a first end configured to be coupled to the lubricant container and a second end configured to be coupled to the lubricant reservoir, and a squeeze mechanism that is mechanically coupled to the second support and that is actuatable to move the second support towards the first support such that a lubricant container disposed between the first and second supports is squeezed, whereby the content of the lubricant container is discharged through the flow connection. A wind turbine lubrication system and method of refilling a wind turbine lubricant reservoir are provided.

A pneumatic motion system includes a plurality of casings, a plurality of frame members respectively extending into the casings, a plurality of linear rails respectively mounted to the frame members, a plurality of main weight members respectively and movably mounted to the linear rails, at least one air supply member, and pairs of main air compressors. Each pair of the main air compressors is disposed at one of two opposite ends of a respective one of the casings. For each casing, when the respective one of the main weight members is moved to the one of the opposite ends of the casing, each pair of the main air compressors is pressed by the main weight member to force air into the at least one air supply member.

A method of priming a pump includes supplying lubricant, via a priming flow path, into an interface defined between a first part of a shaft of the pump and a second part of the shaft coaxially engaged with the first part of the shaft to define the pump, the first part of the shaft rotatable about a rotation axis relative to the second part of the shaft, and supplying lubricant into the interface via a lubrication flow path that is different from the priming flow path. A method of lubricating an aircraft motor of an aircraft engine, and a machine for an aircraft engine are also described.

Provided is a diagnosis technique with high reliability when a state of lubricating oil of a rotary machine such as a wind power generator is diagnosed by a state monitoring sensor. A diagnosis system of lubricating oil includes a lubricating oil utilization device, a lubricating oil tank for storing lubricating oil to be supplied to the lubricating oil utilization device, and a sensor which measures characteristics of the lubricating oil. In this system, the state of the lubricating oil is diagnosed by using sensor data obtained after a time required for air bubbles in the lubricating oil generated at the time of use of the device disappear elapses since the lubricating oil utilization device is regularly or irregularly stopped.