Disclosed is a device for lubrication of a unit turning under vacuum, such as a flywheel, where the unit includes an axle rotating relative to a fixed bearing structure, via at least one bearing or roller, and where the unit is placed in an enclosure connected to a vacuum, with: a lubricant reservoir connected by pipes both to the bottom of the enclosure and also to the bearing; and fluid suitable circulator for connecting the reservoir either to the vacuum, for filling the reservoir from the enclosure by gravity, or to the atmosphere for lubricating the bearing. The fluid circulator includes a three-way valve connecting the reservoir either to the vacuum or to the atmosphere.

A gravity oiler assembly for for passively managing a fluid within an input fluid reservoir for use in an equipment fluid reservoir. The gravity oiler assembly comprises a fitting, the input fluid reservoir, and a nozzle. The fitting comprises an outer surface, an inner cavity, a top aperture, and a side aperture. The input fluid reservoir comprises a bottle being arranged with a fluid passage attached to the nozzle. The nozzle is arranged below the input fluid reservoir and inserted into the top aperture of the fitting. The gravity oiler assembly is configured to allow the fluid in the input fluid reservoir to enter a portion of the nozzle, the inner cavity and the side aperture. The gravity oiler assembly is configured to store the fluid in the input fluid reservoir and passively dispense the fluid into an equipment fluid cavity of the equipment fluid reservoir.

A gravity oiler assembly for for passively managing a fluid within an input fluid reservoir for use in an equipment fluid reservoir. The gravity oiler assembly comprises a fitting, the input fluid reservoir, and a nozzle. The fitting comprises an outer surface, an inner cavity, a top aperture, and a side aperture. The input fluid reservoir comprises a bottle being arranged with a fluid passage attached to the nozzle. The nozzle is arranged below the input fluid reservoir and inserted into the top aperture of the fitting. The gravity oiler assembly is configured to allow the fluid in the input fluid reservoir to enter a portion of the nozzle, the inner cavity and the side aperture. The gravity oiler assembly is configured to store the fluid in the input fluid reservoir and passively dispense the fluid into an equipment fluid cavity of the equipment fluid reservoir.

A tidal current energy generating device includes an outer frame (1), at least one inner frame (2), at least two hydro turbines (3), at least one center shaft (4), at least one generator (5), and at least three bearings (6). The at least one inner frame (2) is separably disposed in the outer frame (1). At least two hydro turbines (3) are located below a water surface and are disposed in one inner frame (2). At least two hydro turbines (3) are disposed coaxially and are vertical-axis hydro turbines. At least one center shaft (4) is disposed through the at least two hydro turbines (3), the axis direction of the center shaft is perpendicular to the horizontal plane, and the center shaft (4) rotates along with the rotating of the hydro turbines (3). The at least one generator (5) is located above the water surface and connected with one end of the center shaft (4). The at least three bearings are sleeved on the center shaft (4) and are located on two sides of and between the two hydro turbines (3), respectively. The tidal current energy generating device can be modularly assembled and replaced above the water surface and can extend along the water depth direction, thereby improving the power generating efficiency.

A tidal current energy generating device includes an outer frame (1), at least one inner frame (2), at least two hydro turbines (3), at least one center shaft (4), at least one generator (5), and at least three bearings (6). The at least one inner frame (2) is separably disposed in the outer frame (1). At least two hydro turbines (3) are located below a water surface and are disposed in one inner frame (2). At least two hydro turbines (3) are disposed coaxially and are vertical-axis hydro turbines. At least one center shaft (4) is disposed through the at least two hydro turbines (3), the axis direction of the center shaft is perpendicular to the horizontal plane, and the center shaft (4) rotates along with the rotating of the hydro turbines (3). The at least one generator (5) is located above the water surface and connected with one end of the center shaft (4). The at least three bearings are sleeved on the center shaft (4) and are located on two sides of and between the two hydro turbines (3), respectively. The tidal current energy generating device can be modularly assembled and replaced above the water surface and can extend along the water depth direction, thereby improving the power generating efficiency.

A lubricating oil passage portion that constitutes a cooling portion is exposed to the outside from a casing. Lubricating oil having absorbed heat of a thrust bearing portion and a journal bearing portion is cooled in the cooling portion, when the lubricating oil moves from an upper oil chamber to a lower oil chamber while circulating by use of gravity. Thus, the circulating lubricating oil prompts cooling of the heated thrust bearing portion and journal bearing portion. Additionally, the lubricating oil passage portion of the cooling portion is provided integrally with the casing, on the radially outer side of the casing.

A lubricating oil passage portion that constitutes a cooling portion is exposed to the outside from a casing. Lubricating oil having absorbed heat of a thrust bearing portion and a journal bearing portion is cooled in the cooling portion, when the lubricating oil moves from an upper oil chamber to a lower oil chamber while circulating by use of gravity. Thus, the circulating lubricating oil prompts cooling of the heated thrust bearing portion and journal bearing portion. Additionally, the lubricating oil passage portion of the cooling portion is provided integrally with the casing, on the radially outer side of the casing.

A transmission lubricating structure includes: a main tank; an auxiliary tank; a common line to supply lubricating oil from the main or the auxiliary tank; a main line to introduce the lubricating oil in the main tank to the common line; an auxiliary line to introduce the lubricating oil in the auxiliary tank to the common line; a common nozzle configured to discharge the lubricating oil, supplied from the common line, to a transmission; a pump configured to supply the lubricating oil from the main tank to the common line; and a relay valve arranged lower than the auxiliary tank and higher than the common nozzle and provided upstream of the common line, the relay valve being configured to block the auxiliary line when the pump is operating and open the auxiliary line so the common line communicates with the auxiliary tank when the pump is in a stop state.

Oil System for Hinges is a mechanism that provides door hinges with a controlled consistent oiling to prevent the problems related to the lack of lubrication or/and for the sake of scenting. It is mainly a small article placed on the top of the hinge pin cap. It is provided with a lubricant chamber and a lubricant flow-controlling mechanism. The means of controlling the lubricant flow can be passive, active or indirect.

Oil System for Hinges is a mechanism that provides door hinges with a controlled consistent oiling to prevent the problems related to the lack of lubrication or/and for the sake of scenting. It is mainly a small article placed on the top of the hinge pin cap. It is provided with a lubricant chamber and a lubricant flow-controlling mechanism. The means of controlling the lubricant flow can be passive, active or indirect.