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

A technology of aerostats and exhaust valves, which is applied in the field of aviation aerostats, can solve problems such as high assembly accuracy requirements, inability to ensure airtightness, and no pre-tightening force on the valve cover, so as to improve product reliability and improve product quality. Good consistency, increase the effect of air tightness

Inactive Publication Date: 2015-12-09
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: Ideally, there should be a certain pre-tightening force after the valve cover 3 is closed to ensure the airtightness of the exhaust valve, which is especially important for the helium exhaust valve of the main air bag of the aerostat. The valve cover 3 covers the sealing ring 4 and the valve port of the valve body 13; the control circuit 8 is connected to the motor 1, and is used to control the rotation of the motor 1 and limit the current of the motor 1 to automatically cut off the power supply of the motor 1; the motor 1 is connected to the valve cover 3, It is used to control the lifting and moving down of the valve cover 3 along the lead screw; the upper limit element 7 is connected to the control circuit 8; the stop block 9 is fixedly connected to the lead screw 2; when the motor 1 rotates, the stop block 9 moves up and down along the lead screw 2 , the gear block 9 is in contact with the upper limit element 7, the upper limit element 7 cuts off the co...

Embodiment 2

[0022] Embodiment 2: The upper limit of the opening of the exhaust valve only determines the degree of opening of the valve cover 3, and a slight installation error does not affect the performance of the exhaust valve. Therefore, the current control of the lower limit of the closing of the valve cover 3 is mainly considered here. After the bonnet 3 is in contact with the sealing ring 4, the current increased due to the blocked rotation of the motor 1, and after a certain level, the power is cut off. The magnitude of the current can determine the pretightening force of the bonnet 3 closing, so through the circuit design, It can be guaranteed that all the valve covers 3 produced can be closed in place, and there is a consistent pretightening force after the valve covers 3 are closed, which is beneficial to enhance the airtightness of the exhaust valve. Thus, the present invention arranges a circle of screw holes on the outer circle of the valve body 13, and relies on the screw ho...

Embodiment 3

[0023] Embodiment 3: A plurality of columns 5 are respectively located between the base 6 and the valve body 13 and the two are connected into one body, and the plurality of columns 5 are used to support the base 6 and the valve body 13; the screw 2 is connected through the screw 2 The screw holes arranged on the flange structure of the lower end face of the valve are fixedly connected with the valve cover 3, and the lead screw 2 is used for opening and closing the valve cover to leave and cover the valve port. The upper end surface of the lead screw 2 has a threaded hole.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64B1/62
Inventor 黄宛宁何小辉
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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