RU2360136C1 - Heated spinner of turbofan engine - Google Patents

Abstract

FIELD: motors and pumps.

SUBSTANCE: heated spinner of turbofan engine contains front cowling with slotted cavity and rear cowling adjoining the front cowling. The heated spinner or at least front cowling with slotted cavity are made as a single-piece unit from glass organoplastic. The slotted cavity may be implemented with longitudinal stringers or helical stringers. The rear cowling is also made as a single-piece unit with inner sidewall.

EFFECT: improved reliability of heated spinner.

4 cl, 5 dwg

Description

The invention relates to turbofan engines for ground and aviation purposes.

Known heated coke of a turbofan engine containing a front cowl fairing with a slot cavity and a rear cowl adjacent to it (see patent RU 2204036 C2, F02C 3/36 on "Gas turbine engine", publ. 2003.05.10).

According to its characteristics and the achieved result, this cook is closest to the claimed one and is taken as a prototype.

This coke is made of several metal parts: the front fairing (outer shell) and the inner shell with a slot cavity between them and the adjacent rear fairing adjacent to them by interconnecting fasteners.

The disadvantage of coca is its low reliability, due to the complexity of the design, the significant probability of destruction (undocking) of the compounds under the influence of vibrations, increased icing at low temperatures (from minus 40 to 0 ° C) and significant mass.

The objective of the invention is to increase the reliability of the coca.

This problem is solved by improving the heated coca of a turbofan engine containing a front cowl with a slot cavity and a rear cowl adjacent to it.

The improvement consists in the fact that the coke or, at least, the front fairing with the slotted cavity is made of monoblock fiberglass, the slotted cavity is made with longitudinal ribs, the slotted cavity is made with screw ribs, the rear fairing is made of monoblock with an inner shell.

The implementation of coca or, at least, the front fairing with a slotted cavity made of monoblock fiberglass plastic can simplify its design, reduce and even eliminate the possibility of its undocking due to vibration, reduce the tendency to icing and weight, and thereby increase reliability.

The implementation of the slotted cavity with longitudinal ribs allows you to increase the rigidity of the front fairing with an even greater decrease in its mass.

The implementation of the slotted cavity with a helical rib allows you to increase the speed of the flow of hot air heating the coke.

Below, with links to the accompanying drawings:

figure 1 - monoblock cooker;

figure 2 - cook with one-piece front fairing;

figure 3 - view And with longitudinal ribs;

figure 4 (option) is a view And with helical ribs;

5 is a cook with a monoblock rear fairing with an inner shell,

describes the proposed coca.

The heated coke of the turbofan engine comprises a front cowl 1 and an inner shell 2 with a slot cavity 3 between them and a rear cowl 4 adjacent to the cowl 1.

Kok is characterized in that the front cowl 1, the inner cowl 2 and the rear cowl 4 (Fig. 1), or at least the front cowl 1 with the inner bezel 2 and the slot cavity 3 formed by them (Fig. 2), are made of monobloc from fiberglass plastic ( which made it possible to simplify its design, reduce and even eliminate the probability of its undocking due to vibration, reduce the weight and the likelihood of icing during operation).

In the execution of coca:

a slotted cavity is made between the front cowl 1 and the inner shell 2 with longitudinal ribs 5 (Fig. 3) (which makes it possible to increase the rigidity of the front cowl while reducing its mass);

the slotted cavity is made with screw ribs 6 (figure 4) (which allows to increase the flow rate of hot air);

the rear cowl 4 is made monoblock with the inner shell 2 (figure 5) (which allows you to change the front cowl under the conditions of testing and operation).

Kok works as follows. If there is a risk of icing from the compressor 7 of the engine 8 (shown by thin lines), hot air (shown by an arrow) enters the slotted cavity 3 of the front fairing 1, which passes through the slotted cavity 3 and heats the cake (its outer surface), excluding icing.

In the coca versions, hot air moves along the slotted cavity 3 between the longitudinal ribs 5 or along the spiral channels formed in the slotted cavity 3 by the screw ribs 6, with an increased speed of hot air and better heating of the coca in the latter case.

Heated coc compared with the prototype has increased reliability.

Claims (4)

1. Heated turbofan engine coke containing a front cowl fairing and an adjacent cowl adjacent to it, characterized in that it, or at least the front cowl fairing, is made of monoblock fiberglass plastic. 2. The cook according to claim 1, characterized in that the slotted cavity is made with longitudinal ribs. 3. The cook according to claim 1, characterized in that the slotted cavity is made with screw ribs. 4. The cook according to claim 1, characterized in that the rear fairing is made monoblock with an inner shell.

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