摘要:
Fluid pumping system and method provide a pumping chamber with inlet and outlet ports. The pumping chamber is in thermal communication with a thermal system for alternating the gas temperature inside the pumping chamber between heated and cooled states. A first valve controls a first fluid communication between the pumping chamber and the external environment, and a second valve controls a second fluid communication between the pumping chamber and the fluid container. The pumping chamber and the valves cooperate to generate a vacuum and a negative potential pressure of the gas inside the pumping chamber by the effect of the gas temperature alternation when the gas passes from a heated state to a cooled state and by controlling the first and second fluid communications. The generated vacuum and negative potential pressure inside the pumping chamber enable pumping of the fluid from the fluid container inside the pumping chamber.
摘要:
A manual/pneumatic pump structure includes: a barrel member having a barrel body defining a fuel collection space; a cover body disposed on the barrel body for sealing the fuel collection space; a pneumatic gas-sucking member having a main body disposed on the cover body and a Venturi tube section positioned in the main body, an inlet passage being formed in the main body in communication with an inlet of the Venturi tube section, an outlet passage being formed in the main body with a first end in communication with an outlet of the Venturi tube section, a second end of the outlet passage being permissible to communicate with the atmosphere; and an isolation section for isolating internal passage of the pneumatic gas-sucking member from the atmosphere. The isolation section has a movement space within which a stopper body is movable between a blocking position and an unblocking position.
摘要:
An improved fuel transfer pump is provided for relatively high flow transfer of fuel from one aircraft to another during an inflight refueling procedure, wherein the fuel transfer pump includes a jet-type scavenge pump for evacuating residual fuel from a fuel line or manifold. The scavenge pump comprises a venturi element connected along a recirculation conduit through which a small fuel flow is diverted from the high pressure discharge side of the fuel transfer pump for return to the fuel tank. The recirculation fuel flow induces a vacuum in a suction throat of the venturi element, and this vacuum is coupled by a suction line to evacuate residual fuel from the fuel line or manifold to the fuel tank. A flow baffle is mounted along the recirculation conduit downstream from the venturi element to ensure flooding and priming of the scavenge pump.
摘要:
A fluid pressure apparatus of this invention provides advanced control without imposing an excessive burden on a sequencer. When a plurality of fluid pressure apparatuses are connected to one another by manifolds, the individual fluid pressure apparatuses are provided with controller circuits each having a memory inputted with a control step, wherein each of the controller circuits activates each of control valves and a sensor based on an operating instruction issued from the sequencer to thereby execute processes such as confirmation of a controlled state, a trouble decision, etc.
摘要:
A manipulating device includes a gripper (11) for gripping workpieces (19) by way of a negative pressure. A suction pump for generating and feeding the negative pressure as well as at least one valve (24) are disposed in a casing (14). The casing is connected with the suction gripper (11). The negative pressure can be applied to the suction gripper (11) by means of the valve (24).
摘要:
A vacuum generating and control device for use to grasp and move articles having an ejector pump utilizing compressed air from a compressor source. The device includes integrally built in means for beginning and stopping the vacuum suction.
摘要:
A method for operating a water-jet pump, in which the water needed for operation of the pump is recirculated in a cycle. The water is pressurized by means of compressed air at a substantially constant air pressure and the compressed air is used to drive out the water through the water-jet pump. Expanding the compressed air in a defined expansion space withdraws heat from the water by absorbing such heat in the air during and after its expansion. Apparatus for operating a water-jet pump includes a pair of ejecting receptacles and a first water valve for alternate connection of the ejecting receptacles to the pressure side of the water-jet pump. Second water valves return to the ejecting receptacles water which has been discharged from the water-jet pump. A first compressed air valve connects a compressed air source alternately to the ejecting receptacles and a second compressed air valve alternately connects the ejecting receptacles to an expansion vessel for expanding and thereby dropping the pressure of compressed air from the connected one of the ejecting receptacles. Expansion of the compressed air in the expansion vessel cools the water circulated through the water-jet pump, in one embodiment by immersion of the expansion vessel in such water and in another embodiment by spraying of a portion of such water into the expansion vessel.
摘要:
A fluid flow control device includes a first fluid flow passageway, a fluid inlet into the first passageway, a fluid outlet from the first passageway, a second fluid flow passageway in flow communication with the first passageway, and a fluid flow-through opening in fluid flow communication with the second passageway. The fluid flow control device is controlled to selectively provide, alternatively, a vacuum or a pressure condition at the flow-through opening. A pneumatic transfer system is also disclosed for alternately transferring a batch of particulate material from a storage area to a batching vessel, and for transferring the particulate material from the batching vessel to a remote location. The system includes a single blower having its high pressure side in flow communication with the fluid flow control device for selectively providing both vacuum and pressure conditions in the batching vessel to effect the selected transferring of particulate material into and out of the batching vessel. A gas separation filter device is provided for separating particulate material from the conveying fluid when the batching vessel is being filled, and which is back flushed of entrained particulate material when the batching vessel is being emptied.
摘要:
A novel gas-powered aspirator comprises a venturi chamber for suctioning a vacuum jar incorporating a valve body, movable between two positions, one for directing gas to the venturi chamber, and the other for closing it from the gas supply. The valve body position is determined by the vacuum pressure in the jar.
摘要:
An air cleaner assembly (10) which includes a mechanism (14) for inducing the flow of air through the air cleaner (10) and for backwashing a filter element (18) is disclosed. A filtering chamber (28) is defined between the interior of a housing (12) and an exterior of a tubular shaped filter element (18). The mechanism (14) includes an air inlet plenum (32) and an accumulator chamber (34). Pressurized fluid is supplied to the plenum (32) through an inlet (54). To induce the flow of particulate laden air through the filter element (18), the pressurized fluid passes through an outlet (52) from the air inlet plenum (32). A flexible wall or diaphragm (42) is moved upwardly under the influence of the pressurized fluid supplied to the air inlet plenum (32) and moves wall member (44) upwardly into sealing engagement with top wall member (48). In this position, a portion of the pressurized fluid bleeds through holes (58) into the accumulator chamber (34) to be stored therein. When pressurized fluid is no longer supplied to air inlet plenum (32), the flexible wall (42) moves downwardly and a gap is formed between the top edge of wall member (44) and top wall member (48). The accumulated pressurized air thereafter rushes from accumulator chamber (34) in a reverse direction to backwash the filter element (18).