摘要:
A pump system includes a turbine (101) shaft including a turbine (103) disposed thereon to rotate the turbine shaft at a turbine shaft speed due to fluid flow through the turbine, a centrifugal pump (105) directly connected to the turbine shaft and configured to pump hydraulic fluid at the turbine shaft speed, a bleed port (205a) disposed downstream of the centrifugal pump, and a valve (109) configured to be fluidly connected to the bleed port and configured to meter flow to the turbine to regulate the turbine shaft speed at least partially as a function of pressure from the bleed port.
摘要:
The invention refers to an electrically powered propulsion system for use in a spacecraft (1) that comprises a first center of gravity (3) at a first time of operation and a second center of gravity (4) at a second time of operation, wherein the second center of gravity (4) is different from the first center of gravity (3). The electrically powered propulsion system for use in a spacecraft (1) comprises a thruster realignment mechanism (30) and at least two thrusters (10, 20) coupled to the thruster realignment mechanism (30), each of the at least two thrusters (10, 20) having an individual thrust vector (11, 21). The thruster realignment mechanism (30) is adapted such that, in a first position, the individual thrust vectors (11, 21) of the at least two thrusters (10, 20) pass through the first center of gravity (3) and such that, in a second position, the individual thrust vectors (11, 21) of the at least two thrusters (10, 20) pass through the second center of gravity (4). The thruster realignment mechanism (30) holds the first position in case all of the at least two thrusters (10, 20) are without any failure. The thruster realignment mechanism (30) realigns the thrusters (10, 20) to the second position in case that one of the at least two thrusters (10, 20) has a failure and/or a predetermined time criterion is fulfilled.
摘要:
An engine assembly includes a gas-turbine engine having a tailcone portion (130) and a bypass duct (126), a rocket engine combustion assembly (132, 134) located at the tailcone portion (130) of the gas-turbine engine, and a movable nozzle segment subassembly (102) that is selectively engageable with the gas-turbine engine bypass duct (126) in an open position and with the rocket engine combustion assembly in a closed position.
摘要:
The invention concerns a device comprising a bracket (22) connected to an activating member (18a) mounted on a divergent nozzle (12) by means of inserts (32) designed to be arranged and locked in the divergent nozzle wall, and fixing means comprising an element capable of elastic deformation (24) for compensating possible heat-related dimensional variations to maintain the bracket (22) pressed on the divergent nozzle (12). A support element (26) is connected to the inserts (32) so as to compress the element capable of elastic deformation (24) between the support element (26) and the bracket (22).
摘要:
A turbine pump assembly (20) has a turbine (22), a centrifugal pump (24), and a passive electrical speed control system. The turbine (22) has a peak efficiency at a first speed that is lower than a second speed at which the centrifugal pump (24) is operating at a peak power requirement. A rocket thrust vector control system is also disclosed.
摘要:
The present invention relates to a method (50) for controlling the orbit of a satellite (10) in earth orbit, the orbit of the satellite (10) being controlled by commanding, according to a plane of operation, the propulsion means (30, 31), including at least one thruster, and means for moving (20, 21) said propulsion means. According to the invention, said plane of operation includes at least two orbit-control operations, thrust powers of the propulsion means (30, 31) during said two orbit-control operations having respective thrust directions that are not parallel in an inertial frame of reference, each one of said thrust powers being determined so as to simultaneously control the inclination and the position of the orbit of the satellite as well as to form a momentum that is suitable for unloading a device for storing angular momentum of said satellite in a plane orthogonal to the direction of thrust of said thrust power.
摘要:
A turbine pump assembly (20) has a turbine (22), a centrifugal pump (24), and a passive electrical speed control system. The turbine (22) has a peak efficiency at a first speed that is lower than a second speed at which the centrifugal pump (24) is operating at a peak power requirement. A rocket thrust vector control system is also disclosed.
摘要:
Bei einem Stellmechanismus zum Verstellen wenigstens eines Triebwerks (4) eines Raumflugkörpers (1) umfassend eine Triebwerksplatte (10) für das wenigstens eine Triebwerk, einen schwenkbaren Ausleger (9) zum Verschwenken der Triebwerksplatte zwischen einer eingeklappten, dem Raumflugkörper benachbarten Position und wenigstens einer ausgeklappten, von dem Raumflugkörper beabstandeten Position, und einen ersten Verstellantrieb (5) zum Verschwenken des Auslegers und einen zweiten Verstellantrieb (6) zum Orientieren der Triebwerksplatte relativ zum Ausleger, weist der erste Verstellantrieb eine einachsige Schwenkvorrichtung (7) umfassend eine erste Schwenkachse (8) auf und der zweite Verstellantrieb weist eine wenigstens zweiachsige Schwenkvorrichtung (11,13) umfassend eine zweite (12) und eine dritte (14) Schwenkachse auf, wobei die zweite oder die dritte Schwenkachse zur ersten Schwenkachse parallel verläuft oder in die parallele Lage bringbar ist.