Anti-icing passage system with functions of precooling and backheating

Abstract

An anti-icing passage system with functions of precooling and backheating relates to the anti-icing operation of a passage of an engine with higher entraining temperature, comprises a anti-icing pipeline (10), a valve (11), a regulator (12) and a sensor (13), wherein the valve (11) is arranged on the anti-icing pipeline; the regulator (12) is used for regulating air pressure in the anti-icing pipeline; and the sensor (13) is used for monitoring pressure at an outlet of the regulator. The anti-icing passage system is characterized by comprising an inner-side anti-icing cavity (7) and an outer-side anti-icing cavity (6), wherein the inner-side anti-icing cavity (7) is formed by a clapboard (1) and an inner envelop (2), and the outer-side anti-icing cavity (6) is formed by the inner envelop (2) and an outer envelop (3); an air let (5), connected with the anti-icing pipeline (10), is left at the inner-side anti-icing cavity (7); a communicating hole (9) is arranged between the inner-side anti-icing cavity and the outer-side anti-icing cavity; and a vent (4) is left at the outer-side anti-icing cavity (6). The passage anti-icing system has a simple structure, high reliability and a low cost, is especially suitable for anti-icing passage systems of engines of turbine type and the like with higher entraining temperature, and is capable of reducing the entraining quantity of the system and the influence on the performances on the engine.

Description

technical field [0001] The invention relates to an anti-icing system for an intake port, in particular to an anti-icing system for an engine intake port with high bleed air temperature. Background technique [0002] Most of the existing anti-icing systems for engine intakes are hot air anti-icing systems, which use hot air drawn from the engine compressor to adjust the temperature and pressure of the engine hot air to heat the leading edge of the intake. Water impinging on the leading edge of the intake duct absorbs heat from the skin and evaporates. In order to prevent the leading edge structure from overheating when the hot gas heats the leading edge of the intake port, it is usually necessary to adjust the temperature of the hot gas to adjust the temperature of the bleed air to a certain temperature. Usually, it is necessary to install a cooler after the bleed air. This will cause a part of the heat loss. At the same time, the precooler of the original system needs to b...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: in order to overcome the problem in the prior art that when the bleed air temperature is high, it is necessary to adjust the temperature of the engine bleed air through a precooler to reduce the bleed air temperature, thereby causing a waste of energy. Provides an air intake anti-icing system that does not pass through a pre-cooler to lower the temperature of the higher bleed air, thereby improving the energy utilization rate of the hot air. The system has simple process, low cost and high reliability

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