摘要:
A nose-wheel steering system is provided. The nose-wheel steering system includes a hydraulic motor (250) including a drive shaft configured to rotate about a first axis; and a hydraulic motor start assist mechanism (328) coupled to the hydraulic motor and configured to provide a temporary boost of hydraulic fluid pressure supplied to the hydraulic motor.
摘要:
A system for extracting energy for landing gear retraction, comprising: a first landing gear assembly including a first wheel (100); a first actuator (150;152;154;156) configured to control retraction of the first landing gear assembly; a first wheel pump (112) rotationally coupled to the first wheel, the first wheel pump comprising at least one of a first hydraulic pump or a first wheel powered electric motor, wherein the at least one of the first hydraulic pump or the first wheel powered electric motor is configured to generate an output in response to rotation of the first wheel, and wherein the output of the at least one of the first hydraulic pump or the first wheel powered electric motor is configured to actuate the first actuator; a second landing gear assembly including a second wheel; a second actuator configured to control retraction of the second landing gear assembly; and a second wheel pump rotationally coupled to the second wheel, the second wheel pump comprising at least one of a second hydraulic pump or a second wheel powered electric motor..
摘要:
The invention concerns a telescoping strut (1) for a retractable landing gear (LG) in an aircraft (A). The telescoping strut (1) comprises a pre-pressurized and central extension chamber (12) extending along the telescoping strut (1) and a surrounding retraction chamber (13). For retraction, an hydraulic generation architecture (HG) of the aircraft (A) feeds a single input / output passage (24) of the surrounding retraction chamber (13) with a overcoming fluid pressure that overwhelms a extension positive pressure in the central extension chamber (12) and opposes the effect of the pre-pressurizing. The retraction system (S) is for instance for a rotorcraft.
摘要:
A rod end of an actuator assembly is disclosed. The rod end may comprise a rod piston end (302) having an outer profile, and a rod joint end (304) opposite the rod piston end, wherein the outer profile comprises an elliptical shape comprising a major diameter (312) and a minor diameter (314), wherein the major diameter may be larger than the minor diameter in length.
摘要:
A hydraulic cylinder includes: a cylinder tube; a piston; a piston rod; a pair of end covers; and a snubbing mechanism configured to reduce the moving speed of the piston after the piston reaches the vicinity of the end of its stroke. The snubbing mechanism includes: a supply/discharge port formed in an associated one of the end covers; a valve configured to open and close the supply/discharge port; a connector configured to connect the valve and the piston together; and at least one recess extending from the edge of the supply/discharge port. When the piston approaches the end of its stroke, the valve closes the supply/discharge port to form a throttle oil passage, and hydraulic oil is discharged through the throttle oil passage to reduce the moving speed of the piston.
摘要:
A front landing gear system for an aircraft including a swing arm rotatively coupled to a wheel, a forward link arm rotatively coupled to the swing arm, a oleopneumatic cylinder rotatively coupled to the swing arm, second extension arm and a bulkhead, a plate rotatively coupled to the bulkhead, an actuation device rotatively coupled to the bulkhead and to the plate, where refraction of the linear actuation device causes the plate and extension arms to move upward towards the bulkhead.
摘要:
Système de commande (1) comportant une tige de commande (5) s'étendant entre : - une première zone (2) située dans une enceinte hydraulique délimitée par une paroi d'enceinte (3) ; et - une seconde zone (4) située à l'extérieur de ladite enceinte hydraulique ;
le système de commande (1) comportant en outre des moyens d'étanchéité (6) disposés autour et contre cette tige de commande (5) pour s'opposer au passage de fluide entre les première et seconde zones (2, 4). Le système comporte une pièce de guidage (7) assemblée de manière amovible vis-à-vis de la paroi d'enceinte (3), les moyens d'étanchéité (6) sont assemblés à l'intérieur de la pièce de guidage (7) de manière à autoriser un déplacement relatif de la tige (5) par rapport à la pièce de guidage (7) tout en réalisant une étanchéité entre lesdites première et seconde zones (2, 4).