Sand-preventing dust-filtering filter unit and helicopter

Abstract

The invention discloses a sand-preventing dust-filtering filter unit. The filter unit comprises a frame body with a ventilation channel, a filter and a flow divider, wherein the frame body comprises an air inlet side and an air outlet side which are oppositely arranged and communicate with the ventilation channel; the flow divider is arranged far away from the air inlet side and divides the exhaust side of the frame body into a clearing flow channel and a main flow channel; the filter comprises a sand prevention module and a dust prevention module which are obliquely arranged in an airflow direction; the sand prevention module is used for colliding with sand and dust in dust-containing airflow flowing into the ventilation channel so as to allow the sand and the dust in the dust-containingairflow to flow into the clearing flow channel and to be discharged under the action of collision rebound and inertia force of the sand and the dust and the wall surface; and the dustproof module is arranged on the air outlet side of the sand control module, so the airflow filtered by the sand prevention module is subjected to secondary filtration, and the airflow having undergone secondary filtration flows into the main flow channel. The invention further discloses a helicopter. According to the sand-preventing dust-filtering filter unit, the replacement and cleaning frequency of the dust prevention module is reduced, and maintenance cost is low.

Description

technical field [0001] The invention relates to the technical field of filter devices, in particular to a sand control and dust filter device. The invention also relates to a helicopter. Background technique [0002] Due to the good maneuverability and flexibility of helicopters, they are often used to perform special tasks such as transportation, patrol, search and rescue, and often work in harsh natural environments such as sand, dust, salt spray, and rain. When the helicopter takes off, lands, flies near the ground or hovers, the downwash of the rotor and the circulation around the fuselage interact with the sand and dust on the ground surface to easily form a local dust environment. The sand and dust inhaled by the helicopter engine will cause wear of the rotating parts and fuel nozzles. and turbine blade gas film hole clogging, etc., resulting in performance degradation, a sharp shortening of life, and doubling of maintenance costs. Additionally, engine ingestion of f...

AI Technical Summary

Problems solved by technology

[0004] The sand-proof and dust-filtering device provided by the present invention solves the technical problems that the filter screen of the existing blocking filter is easily blocked by sand and dust, the air intake loss increases after the blockage, and the maintenance cost is high

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