Airspeed head blockage cleaning structure

Abstract

The invention relates to the technical field of measuring equipment, and discloses an airspeed head blockage cleaning structure which comprises a shell, a total pressure pipe is arranged in the shell,a static pressure cavity is formed between the shell and the total pressure pipe, the total pressure pipe is provided with a total pressure section, a limiting section and a cleaning section, and a driving plunger is assembled in the total pressure section. According to the airspeed head blockage cleaning structure, sundries are knocked out through an obstacle cleaning block, normal circulation of air in the total pressure pipe is guaranteed, then the condition that an airspeed head operates normally all the time is ensured, the maintenance requirement of the airspeed head is lowered, and especially for various gradually-popularized unmanned aerial vehicles, the condition that the degree of the airspeed head is not distorted under the low maintenance level is ensured, the normal operationof the aircraft is ensured, and secondly, whether the airspeed head is blocked or frozen or not is judged by judging whether the obstacle cleaning block reaches a port or not, the internal sensing capacity of the airspeed head is enhanced, meanwhile, an icing sensing structure is simplified, internal cakes are discharged through impact, and the airspeed head blockage cleaning is more efficient and more energy-saving.

Description

technical field [0001] The invention relates to the technical field of measuring equipment, in particular to a pitot tube blockage cleaning structure. Background technique [0002] see Figure 7 , the external atmosphere enters the total pressure chamber and the static pressure chamber respectively through the front total pressure inlet and the side static pressure inlet, the total pressure chamber and the static pressure chamber are airtightly isolated, the total pressure chamber and the static pressure chamber The pressure is sent to both sides of the barometer through the trachea respectively, and the flight parameters such as the flight speed, flight Mach number and altitude of the aircraft are measured. [0003] When the aircraft is parked on the apron, it is necessary to cover the pitot tube to prevent debris on the ground and insects from entering the pitot tube and blocking it. However, in reality, there are often cases where the ground crew forget to put on the prot...

AI Technical Summary

Problems solved by technology

[0003] When the aircraft is parked on the apron, it is necessary to cover the pitot tube to prevent debris on the ground and insects from entering the pitot tube and blocking it. However, in reality, there are often cases where the ground crew forget to put on the protective cover, such as Bergen Aviation 757 The case of the passenger plane crash was that the butterfly flew into the airspeed tube to build a nest, resulting in the wrong airspeed display, which caused the pilot to perform wrong operations, causing the plane to stall and crash

Furthermore, with the development of UAV technology, a large number of functional UAVs have appeared. These UAVs are usually not equipped with a large number of ground crews, and the daily maintenance of their pitot tubes is even worse. more likely to occur

[0004] Secondly, when the aircraft is flying in the air, because the temperature drops by 6 degrees in the high altitude, the water temperature in the high altitude is usually lower, and there are more supercooled water droplets in the air. It will form ice and condense at the air inlet position of the total pressure port of the pitot tube, resulting in the blockage of the total pressure of the pitot tube. The port is too heavy, the structure is complex, and the reliability of the pitot tube is reduced

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