Electric anti-icing heating device of composite material propeller blade
A composite material and heating device technology, applied in the direction of electric heating devices, propellers, deicing devices, etc., can solve the problems of uneven heating of electric heating elements, non-conduction of electric heating elements of blades, and difficult insulation protection, etc., so as to facilitate field maintenance , prevent freezing and long service life
Pending Publication Date: 2021-03-12
AVIC HUIYANG AVIATION PROPELLER
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- Abstract
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Problems solved by technology
In the past, the electric heating element of the electric anti-icing device was fixed on the surface of the blade by bonding on the outer surface. This structure is easy to fall off in alternating cold and hot, humid environments, and the insulation protection is difficult; moreover, the electric heating element generates heat unevenly.
In the past, the power cord of the electric heating element was pre-buried in the blade and solidified and molded. The power cord will gradually age with use, and eventually the electric heating element of the blade will not be conductive.
Method used
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Embodiment Construction
[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0016] Such as figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 As shown, this embodiment includes an outer rubber layer 1 , an electric heating film 2 , a glass cloth 3 , an inner rubber layer 4 , metal wires and wire connectors 6 . In this embodiment, the metal wire and the conductive metal sheath adopt the copper wire conductor 5 and the tinned copper sheath 10 with good conductivity and low cost. There are receiving grooves 9 on the leading edge boundary line 11 of the leading edge surface of the blade body and both sides, and the inner rubber layer 4 matching the receiving grooves 9 is tightly bonded and fixed in the receiving grooves 9 . Preferably, the inner rubber layer 9 is a nitrile rubber layer with a thickness of 0.5-2mm, most preferably 1.2mm. The electric heating film 2 is tightly bonded and fixed in the glass clot...
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Abstract
The invention discloses an electric anti-icing heating device of a composite material propeller blade. An inner rubber layer matched with a front edge boundary line on the surface of the front edge ofa blade body and containing grooves reserved in the two sides of the blade body is tightly bonded in the containing grooves. The glass cloth wrapped and tightly bonded with the electric heating filmis tightly bonded on the inner rubber layer; the outer rubber layer of which the edge is slightly greater than that of the accommodating groove is integrally and densely bonded outside the inner rubber layer, the glass cloth and the electric heating film; one end of the wire joint circular ring is connected with a binding post on the paddle rectifying disc; one end of the metal wire penetrates through a conductive metal sleeve wrapped in the T-shaped end of the wire connector, and the T-shaped end, the metal wire and the conductive metal sleeve are welded and fixed after being connected in a pressing mode. The other end of the metal wire is bent and then is adhered to the electric heating film by using a conductive adhesive; and the metal wire, the conductive metal sleeve and the T-shapedend are sealed between the inner rubber layer and the outer rubber layer. The electric anti-icing heating device is easy to install, not prone to falling off, uniform in heating, not prone to aging and long in service life, and the overall aerodynamic performance of the paddle is not affected.
Description
technical field [0001] The invention belongs to the technical field of anti-icing electric heating for propeller blades, and relates to an electric anti-icing heating device for propeller blades of composite materials used in aircraft. Background technique [0002] In order to ensure that the aircraft can fly normally in icy environments, electric anti-icing devices are bonded to the propeller blades. In the past, the electric heating element of the electric anti-icing device was fixed on the surface of the blade by bonding on the outer surface. This structure is easy to fall off in alternating cold and hot, humid environments, and the insulation protection is difficult; moreover, the electric heating element generates heat unevenly. In the past, the power cord of the electric heating element was pre-embedded in the blade and solidified and molded. The power cord will gradually age with use, and eventually the electric heating element of the blade will not be conductive. C...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B64D15/12B64C11/20H05B3/02H05B3/06H05B3/34
CPCB64C11/20B64D15/12H05B3/02H05B3/06H05B3/34
Inventor 奚青伟田书全王慧玲
Owner AVIC HUIYANG AVIATION PROPELLER