摘要:
The device (10; 110; 210; 310) comprises a support structure (12), on which there are mounted a plug (16), which is adapted to assume a plurality of operating positions including an opening position and a closing position, in which the plug is adapted to at least partially free and respectively obstruct a passage (14), which is meant for a fluid flow to get through; a mechanism (18), which is suited to move and hold the plug (16) between said operating positions; an opening actuator (20) and a closing actuator (22), which are suited to separately act upon the mechanism (18), so that the mechanism (18) moves and holds the plug (16) between said operating positions, namely towards said opening position and towards said closing position, respectively, due to an electric current which is supplied to the opening actuator (20) and to the closing actuator respectively.
摘要:
A solenoid valve assembly (10) includes an armature (34) having a longitudinal axis (Y) and an ovular cross-section, the armature being moveable along the longitudinal axis from a first position to a second position, and a bobbin including a solenoid coil (36) configured to electromagnetically move the armature when energised. The bobbin defines a recess (62) also having an ovular cross section for receiving the armature and restricting lateral movement of the armature, thereby providing a linear actuation path for the armature along the longitudinal axis. A flux coupler (38) and a flux bracket (40) form a magnetic circuit with the bobbin to electromagnetically move the armature. The flux bracket has a pole piece (42) with a commensurate ovular cross-section that limits the movement of the armature along the longitudinal axis, thereby determining a stroke length of the armature. During manufacture, the flux bracket, and therefore the pole piece, are moved relative to the flux coupler to set the stroke length.
摘要:
A metering device comprises: • a valve body (1) equipped with a valve shutter (3) designed to move between a closed position and an open position, • a transmission shaft (5) having a first end connected to the valve shutter and a second end connected to a cam element (7), • a rotary electric actuator (9) comprising a stator assembly (11) and a rotor assembly (13) able to rotate about an axis of rotation (15), the rotor assembly (13) comprising: • a magnetic support frame (17) bearing • a rotor magnet (19). The rotor assembly (13) further comprises a follower (21) fixed to the magnetic support frame (17) and eccentric with respect to the axis of rotation (15) and positioned with the ability to move in the cam element (7) in order to convert the rotary movement of the rotor assembly (13) into a movement of the transmission shaft (5).
摘要:
A fluid dispensing assembly, including a valve, a housing, a user interface, and a fitting to couple to a fluid source. The valve may include a first sensor detecting proper placement of the fluid container based on a magnetic material positioned at the bottom of the fluid container, a plunger having a plunger shaft coupled thereto, the plunger selectively placing the valve in fluid communication with the fluid container, and a solenoid coupled to the plunger shaft and moving the plunger shaft to transition the plunger between an open position and a closed position. The user interface may be coupled to the valve to enable selection of at least a fluid container size and a dispensing mode.
摘要:
In a fuel supply device of a gas turbine engine of the present invention, a fuel divider 66 includes a fuel entrance E1 into which the fuel supplied from a collecting fuel passage 63 is introduced; a pilot port 76 connected to the pilot fuel passage 64; a main port 77 connected to the main fuel passage 65; a pilot port needle valve element 101 which adjusts an opening degree of the pilot port 76; a main port needle valve element 102 which opens and closes the main port 77; and a drive element 100 which is actuated according to the fuel pressure at the fuel inlet E1 to drive the pilot port needle valve element 101 and the main port needle valve element 102.
摘要:
A fail-safe electromagnetic linkage has a support device (108) for a valve head (102), and an actuator component actuable by an actuator. The support device is coupled to the actuator component whilst power is supplied to the electromagnet (140) and decoupled from the actuator component whilst power is not supplied to the electromagnet.
摘要:
The electric-powered air release valve (10) comprises a nozzle (23) provided to an end part of an air channel in a bobbin (20); a fixed iron core (40) that is disposed in the bobbin (20) and aligned with the nozzle (23); an excitation coil (30) for magnetizing the fixed iron core (40) when electrical power is applied; a movable iron plate (60) that moves toward the nozzle (23) from an initial position according to a magnetic attraction force when the fixed iron core (40) is magnetized; a leaf spring (68) for urging the movable iron plate (60) into the initial position; a rubber valve (70) provided to the movable iron plate (60), for adjusting an opening amount of the nozzle (23); and a yoke (50), with distal end parts disposed on both sides of the movable iron plate (60) so as to face with each other through a magnetic gap; wherein a circular hole capable of accommodating a circular column part at one end of the fixed iron core (40) when the movable iron plate (60) is moved toward the nozzle (23) is formed in the movable iron plate (60): and a magnetic gap is maintained between an internal periphery of the circular hole and an external periphery of the circular column part at one end of the fixed iron core (40).