摘要:
The invention relates to a Motorized Water Vehicle (MWV) adapted so as to operate as a fluid-compression station in addition to the primary transport function thereof. Such an MWV can thus supply compressed fluid to a third device. In a preferred and non-exhaustive manner, such an MWV can supply a passenger propulsion device allowing the latter to move through the air or through a fluid. The invention thus preferably relates to a propulsion system in which a remote station is a motorized water vehicle adapted such as to engage with a propulsion device.
摘要:
The invention relates to a torque limiter for an actuator including a screw (101), a nut mounted on said screw, an actuation tube (105) rigidly connected to the nut and means (109, 133) for rotating said screw, said limiter being characterized in that it includes an abutment (115, 110) capable of: preventing the rotation of said tube (105) by friction simply by an axial force exerted by said screw (101) onto said nut during the movement thereof; and enabling the rotation of said tube (105) when said nut arrives at an axial abutment of said screw beyond a predetermined torque threshold defined by the axial force.
摘要:
A vehicle for use on the water that can be propelled into the air above the water is provided. The vehicle can include a main body, a board provided on the bottom of the main body, a seat, an inlet for receiving a pressurized incoming water stream, a main nozzle positioned to direct a flow of water beneath the board, handlebars having handle conduits, each handle conduit ending in a nozzle for discharging a flow of water out of the handle conduit and rotatable relative to the vehicle, and conduits supported by the main body, the conduits connected to the inlet and positioned to route a first portion of the incoming water stream to the main nozzle and a second portion of the incoming water stream to the handlebars. The water stream can be supplied to the vehicle from an outlet on a personal water craft.
摘要:
A variable area mechanism and methods are disclosed. A movable surface comprising a contoured interface surface is operable to rotate about an off-body axis-of-rotation such that the movable surface expands from and retracts into an angle notched surface.
摘要:
A thrust reverser with doors having at least one stationary structure is provided, on which at least one door is mounted pivoting between a closed position in which the door closes the reverser and makes up an outer cowling part, and an open position in which the door opens a passage in the stationary structure and can at least partially block a flow of air generated by a turbojet engine so as to reorient the door. The stationary structure includes at least two sets of cascade vanes that can be covered by the door when in the closed position.
摘要:
This invention relates town ejector nozzle tube 1, having along its length an essentially constant, essentially oval hollow cross-section, with an inflow lip 2, having a pitch-circle type cross-section, being arranged at a flow leading-edge area of the ejector nozzle tube 1. The inflow lip 2 is provided with a plurality of grooves 3 issuing (4) to the top and bottom sides of the ejector nozzle tube 1 and connecting to an interior 5 of the ejector nozzle tube 1 formed by the hollow profile. It also relates to an aircraft engine with optimized oil heat exchanger with at least one oil cooler 6 disposed in a trailing-edge area 7 of an aerofoil-type structure 8, with at least one flow entrance area 9 being provided to supply ambient air to the oil cooler 6 disposed in a flow duct 10, and with an ejector nozzle tube 1 in accordance with one of the claims 1 to 3 being arranged downstream of the oil cooler 6 in the flow duct 10.
摘要:
The proposed adaptive exhaust nozzle features an innovative use of the shape memory alloy (SMA) actuators for actively control of the opening area of the exhaust nozzle for jet engines. The SMA actuators remotely control the opening area of the exhaust nozzle through a set of mechanism. An important advantage of using SMA actuators is the reduction of weight of the actuator system for variable area exhaust nozzle. Another advantage is that the SMA actuator can be activated using the heat from the exhaust and eliminate the need of other energy source. A prototype has been designed and fabricated. The functionality of the proposed SMA actuated adaptive exhaust nozzle is verified in the open-loop tests.
摘要:
A fuel injector for an internal combustion engine, particularly of inwards or outwards opening needle injector type, includes an injector body, e.g., forming a nozzle ending in an injection office, a mechanism for closing off the injection orifice of the injector body, the closing-off mechanism including a vibrating pintle ending in a head for closing off the injection orifice, a return mechanism returning the closing-off to the position in which they close off the injection orifice, and a mechanism for setting the pintle and/or the nozzle into cyclic longitudinal vibration so as to open and close the injection orifice alternately. The fuel injector includes a selectively activatable mechanism immobilizing the pintle with respect to the body.
摘要:
Disclosed is a small watercraft having an engine cooling system which can lessen variation in temperature and temperature distribution of the engine between the time when the engine is starting and when the watercraft is continuously driving with a throttle in a fully open or almost fully open position. The small watercraft adapted to be propelled by a water jet pump driven by an engine, comprises: a first cooling system for cooling a cylinder block of the engine, the first cooling system having an indirect cooling structure; and a second cooling system for cooling an exhaust system, the second cooling system having a direct cooling structure.
摘要:
A pump frame (7) incorporates an upper opening (17), a lower opening (19) and a water passage (21) for connecting the two openings. To cause the lower opening (19) to be opened in water at a position adjacent a stern (1a) of a ship (1), the pump frame (7) is joined to a bottom (1b) of a ship (1). A pump casing (9) is secured to be stood erect above the pump frame (7). The pump casing (9) includes an impeller main shaft (33) stood erect. The impeller main shaft (33) is provided with an impeller (11) for sucking water from below the bottom (1b) through the lower opening (19) so as to pressurize the water. Water pressurized by the impeller (11) is jetted to a position behind the stern (1a) through a discharge pipe (13). As a result, the ship (1) is propelled. The foregoing water jet propulsion apparatus (5) enables sucking performance free from cavitation and excellent propelling performance to be obtained.