Current limiting closed exhaust valve used for aerostat and control method used for limiting same

Abstract

The invention provides a current limiting closed exhaust valve used for an aerostat and a control method used for limiting the same. The exhaust valve comprises a motor, a screw, a valve cover, a seal ring, a column, a pedestal, an upper limiting member, a control circuit, a gear block, a support, a base, a driven wheel and a valve body, wherein the valve body covers on the seal ring and the valve port of the valve body. The control circuit is connected with the motor. The motor is connected with the valve cover and used for controlling the valve cover to move upwards and downwards along the screw. The upper limiting member is connected with the control circuit. The gear block is fixedly connected with the screw. When the motor rotates, the motor makes the gear block move upwards and downwards along the screw, the gear block contacts with the upper limiting member, the upper limiting member cuts off the control circuit, and the motor stops to make the valve cover be in a maximal opening state. When the motor rotates anticlockwise, the motor makes the gear block move downwards, the valve cover contacts with the seal ring to reach a preset compaction state, a pretightening force between the valve cover and the seal ring is kept, the current of the control circuit is limited to cut off the power supply to the motor, the valve cover can be automatically closed and in a sealed and closed state.

Description

technical field [0001] The invention belongs to the technical field of aviation aerostats, and relates to a flow-limiting airtight exhaust valve for aerostats. Background technique [0002] An aerostat is a lighter-than-air aircraft. The capsule body is made of polymer composite material, and the airbag is filled with a buoyant gas with a density lower than that of air. The density difference between the inside and outside of the airbag provides static buoyancy, thereby obtaining a lift that can overcome its own weight. [0003] The aerostat is an inflatable flexible body, which must be controlled by pressure so that the pressure difference between the inside and outside remains within a certain range during the entire flight, thereby maintaining the external shape of the entire aerostat. During the ascent, as the flight altitude increases, the density of the outside air and the atmospheric pressure gradually decrease, and the volume of the buoyant gas in the aerostat expan...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the lower limit element of the existing exhaust valve used for the aerostat needs to be manually adjusted, the assembly accuracy is too high, and there is no pre-tightening force when the valve cover is closed, and sufficient airtightness cannot be guaranteed.

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