Engine air inlet protection grille

Abstract

The invention belongs to the technical field of helicopter anti-icing and particularly relates to an engine air inlet protection grille. The engine air inlet protection grille comprises a longitudinalheating assembly (1), a transverse heating assembly (2) and a power distribution control box (3). The longitudinal heating assembly (1) and the transverse heating assembly (2) each comprise bus barsat the two ends and heating elements, wherein the heating elements are connected with the bus bars at the two ends. The two sets of heating elements are arranged in a crossing manner, so that a grid structure in a shape with the curved surface is formed. The power distribution control box (3) is configured to be used for controlling a switch of a power source to be on or off according to a controlcommand. By means of grille holes of the grid structure, large-particle foreign matter can be prevented from being sucked into an engine, and the grill holes can be prevented from being blocked due to icing; and long-time continuous working safety, achieved in an icing environment, of the engine is guaranteed. When the engine air inlet protection grille is combined with an air inlet antisand device with a bypass for use, the effects of combining sand resistance, foreign matter resistance, bird strike resistance and safety of long-time flying in an icing environment can be achieved.

Description

technical field [0001] The application belongs to the technical field of anti-icing of helicopters, and in particular relates to an engine intake protection grille. Background technique [0002] In order to prevent icing in the air, the engine inlet of the helicopter needs to be heated and anti-icing. In order to prevent large particles of foreign matter from entering the engine during flight, an air intake filter needs to be installed. . [0003] In the prior art, there is no helicopter engine protection device that takes into account sand prevention, foreign matter prevention, bird strike resistance and long-term flight in icy environments. Ordinary air intakes with anti-icing function cannot effectively prevent foreign objects from entering, and cannot prevent birds from entering. After the ordinary air intake filter and sand control device are installed, because there is no heating and anti-icing function, it is easy to freeze when flying in an icy environment. Both of...

AI Technical Summary

Problems solved by technology

When flying in an icy environment for a long time, the icing of the existing ordinary air intake filter or sand control device will gradually block the intake air, causing excessive loss of engine power, and even causing the engine to stall

After the sand control device is set with side or forward air intake bypass, the problem of air intake blockage can be solved, but there are still problems with the entry of large particles of foreign matter and the inability to prevent the entry of birds.

Images