| 摘要 |
A pneumatic propulsion system for passenger vehicles is constituted by a structural beam, composed of modular elements end-supported on pillars. The beam supports the trackway and provides an air duct for pneumatic propulsion of vehicles. A longitudinal slit in the top surface of the beam is sealed by flexible flaps and that press against each other to seal off the duct, while allowing for the passage of support mast. Airflow for propulsion of the vehicle is generated by a stationary airflow generator, which feeds the air propulsion duct by way of connecting ducts and which is outfitted with a set of four butterfly control valves that are controlled by a command and control system of flow and pressure condition in the duct which actuates the valves pneumatically, allowing automatic or manual selection of "suction" or "pressure" conditions in the duct. Shutoff valves are fitted to openings in the bottom surface of the beam to allow isolation of segments of the propulsion air duct or, alternatively, its venting to connecting ducts or to the atmosphere, allowing by means of a combination of several valves to delimit a specific propulsion air circuit. Traction of the vehicles results from the difference in pressure that is established on opposite sides of propulsion plate by the effect of the airflow generated by the generator unit. A support mast connects to a propulsion plate jointly with a traction arm which transfers the resultant tractive force to the vehicle. Adjustable decompression panels assembled on the propulsion plate assure that a maximum safe pressure differential limit is not exceeded, said limit being controlled by the action of a set of springs positioned on both sides of the propulsion plate.
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