Seal for a thrust reverser of a turbojet engine nacelle

Abstract

The present disclosure relates to a seal for an aircraft turbojet engine nacelle thrust reverser, the seal having body having a cross section with respect to a longitudinal axis of the seal that is substantially circular, and a base which is intended to be mounted in a seal support. The seal is notable in that the base of said seal has apertures spaced from each other.

Claims

1. A seal for a thrust reverser of an aircraft turbojet engine nacelle, said seal comprising a body having a cross-section of which with respect to a longitudinal axis (L) of the seal is substantially circular and a base mounted in a seal support affixed on a surface of the thrust reverser, wherein the base includes an end portion with a rectangular cross section and an opposite end portion having an inverted D-shaped cross section, the end portion with the rectangular cross section including apertures spaced from each other, the apertures formed normal to the surface, the seal support comprising holding tabs which have an L-shape, wherein each holding tab extends through one of the apertures.

2. The seal according to claim 1, wherein the apertures are substantially aligned with each other along the longitudinal axis (L) of the seal.

3. The seal according to claim 1, wherein the apertures are evenly spaced.

4. The seal according to claim 1, wherein the apertures have a substantially rectangular shape.

5. The seal according to claim 1, wherein the apertures extend through the base of the seal along a substantially vertical axis (V) of said seal.

6. The seal according to claim 1, wherein the holding tabs of the seal support are substantially aligned with each other along a longitudinal axis (L) of said seal support.

7. The seal according to claim 1, wherein the holding tabs of the seal support are positioned at a longitudinal end portion of the seal support.

8. The seal according to claim 1, wherein the holding tabs of the seal support are evenly spaced.

9. The seal according to claim 1, wherein the holding tabs of the seal support have a substantially L-shaped cross-section with respect to the longitudinal axis (L) of the seal support.

10. The seal according to claim 1, wherein the seal support comprises one single curved longitudinal end portion.

11. The seal according to claim 1, wherein a longitudinal length of the holding tabs of the seal support is substantially equal to a longitudinal length of the apertures of the seal.

12. The seal according to claim 1, wherein a transverse length of the holding tabs of the seal support is substantially equal to a transverse length of an end portion of the base of the seal.

13. The thrust reverser for an aircraft turbojet engine nacelle, comprising vanes and at least one cowl alternately movable between a position according to which the cowl covers said vanes, and a position according to which the cowl uncovers said vanes, said cowl being equipped with a seal according to claim 1, in which the seal cooperates with a deflecting edge of the thrust reverser when said cowl covers said vanes.

Description

DRAWINGS

(1) In order that the disclosure may be well understood, there will now be described various forms thereof, given by way of example, reference being made to the accompanying drawings, in which:

(2) FIG. 1 illustrates a thrust reverser equipped with a seal according to the prior art;

(3) FIG. 2 schematically represents in cross-section a seal known from the prior art;

(4) FIG. 3 illustrates the seal of FIG. 2 mounted in a support according to the prior art;

(5) FIG. 4 schematically illustrates the seal according to the present disclosure, in top view;

(6) FIG. 5 represents the set according to the present disclosure, comprising the seal mounted in its support, viewed in section along line A-A of FIG. 4;

(7) FIG. 6 illustrates the support according to the present disclosure, in isometric view; and

(8) FIG. 7 schematically represents the steps for mounting the seal according to the present disclosure in the support according to the teachings of the present disclosure.

(9) The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

DETAILED DESCRIPTION

(10) The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

(11) In all these figures, identical or similar references refer to identical or similar members or sets of members.

(12) Moreover, in the description and the claims, the terminology longitudinal, vertical and transverse will be used with no limitation with reference to the trihedron L, V, T indicated in the figures.

(13) Reference is made to FIG. 4, representing the seal according to one form of the present disclosure, as viewed from the top.

(14) This seal 105 comprises a tubular body 113 and a base 115 receiving said body 113.

(15) Of course, the body 113 of the seal may have a shape other than cylindrical, for example, parallelepipedic.

(16) According to the present disclosure, the seal 105 has a plurality of substantially apertures 143, which are rectangular in one form.

(17) These apertures 143 are spaced from each other and substantially aligned with each other along a longitudinal axis L of the seal 105.

(18) The apertures 143 are in one form positioned proximate to a longitudinal end portion 121 of the base 115 of the seal 105, but it goes without saying that the apertures 143 may be moved, however, away from or closer to this longitudinal end portion, along the transverse axis T of the seal 105.

(19) Furthermore, according to the variant represented in FIG. 4, the apertures 143 are regularly spaced from each other. This allows for a good distribution of forces when the seal 105 is mounted in its support. This variant is of course, not restrictive, and the apertures may not be regularly spaced from each other if those skilled in the art find a particular interest therein.

(20) The apertures 143 form passages in the base 115 of the seal 105, from the upper support surface, on which the tubular body 113 rests, down to the lower bearing surface of the seal intended to be in contact with the seal support.

(21) These apertured portions of the base of the seal, along the vertical axis of the seal allow, as described in more detail in the rest of the description, receiving holding tabs secured to the seal support ensuring the good holding of the seal in its support.

(22) The seal 105 is intended to be mounted in a seal support, and held in this support at its base 115.

(23) FIG. 5 illustrates such a mounting according to the present disclosure, viewed in cross-section along the line (AA) of FIG. 4.

(24) The previously described seal 105 is inserted into its support 125 by the base 115 of said seal 133, forming a set 133.

(25) The set thus constituted is, for example, intended to be positioned between an upstream portion of the cowl 7 (visible in FIG. 1) of a thrust reverser with vanes and the deflecting edge 9 of said thrust reverser, in order to inhibit the air flowing in the cold air flow path 11 under the effect of the fan of the turbojet engine from escaping from this flow path toward the vanes 3.

(26) To this end, the seal 105 of the set 133 cooperates with the deflecting edge of the thrust reverser when the cowl covers the vanes of the thrust reverser.

(27) Going back to FIG. 5, the longitudinal end portion 121, proximate to which the apertures 143 are positioned, has a substantially rectangular cross-section with respect to the longitudinal axis of the seal, whereas the opposite end portion 123 has a substantially inverted D-shaped cross-section.

(28) The support 125 according to the present disclosure, on which the base 115 of the seal 105 rests, has, for its part, a plurality of angle bracket-shaped holding tabs 145, having a substantially L-shaped or half-T-shaped cross-section with respect to the longitudinal axis L of the support.

(29) The holding tabs 145 are positioned at a longitudinal end portion 147 of the support 125 and pass through the apertures 143 of the seal 105.

(30) As represented in FIG. 6 illustrating the support 125 according to the present disclosure in isometric view, the holding tabs 145 are in one form substantially aligned with each other along a longitudinal axis L of said support and substantially regularly spaced from each other.

(31) The length of these holding tabs along the longitudinal axis of the support substantially corresponds to that of the openings 143 of the seal 105. However, according to specific application parameters, the length of these holding tabs may be caused to be reduced.

(32) Referring again to FIG. 5, when the seal 105 is positioned in its support 125, the upper portion 146 of each holding tab 145 of the support (visible in FIG. 5) substantially covers the entire corresponding longitudinal end portion 121 of the base 115 of the seal 105. In other words, the transverse length of the holding tabs 145 of the support 125 is substantially equal to that of the corresponding longitudinal end portion 121 of the base 115 of the seal 105.

(33) The holding tabs 145 of the support 125 are positioned at the planar longitudinal end portion 147 of the support, whereas the longitudinal end portion 131 opposite to said end portion 147 has a curved portion the cross-section of which with respect to the longitudinal axis of the support is substantially an inverted C-shape, complementary to that defined by the seal 105 disposed in the support.

(34) The curved end portion 131 has a planar surface 141 of greater length than that generally provided in the prior art. This is made possible thanks to the unitary character of this curved end portion, which allows for an easy insertion of the seal into its support.

(35) The mounting of the seal 105 into its support 125 is performed according to the following steps A to C, illustrated in FIG. 7:

(36) step A: the support 125 is fastened beforehand on a member 135 facing the member 137 to be sealed, for example by bonding or welding, or by any other fastening means known to those skilled in the art;

(37) step B: the seal 105 is positioned in its support 125, for example manually, by passing the holding tabs 145 through the openings 143 of the seal;

(38) step C: the seal 105 is forcibly inserted without deforming the base 115 into the support 125. Such an insertion without deformation is allowed thanks to the apertures 143 which receive the holding tabs 145 of the support, thereby allowing sliding of the base of the seal without deformation, until achieving cooperation between the curved end portion 123 of the seal and the curved end portion 131 of the support. Once the seal is positioned in its support, adhesive 149 is disposed along the side wall 151 of the seal 105.

(39) Thanks to the present disclosure, the insertion of the seal into its support 25 is greatly facilitated in comparison with the prior art, and the pull-out resistance of the seal from its support is enhanced.

(40) The presence of apertures in the seal shaped so as to receive holding tabs of the seal support constitutes a solution simple to implement, thereby facilitating the insertion of the seal into its support and offering a good pull-out resistance.

(41) Furthermore, the bonding operations are performed by means of the present disclosure at the side wall of the seal, and not at its bottom as provided for in the prior art, which allows reducing the amount of adhesive required for a good holding of the seal in its support.

(42) In addition, the adhesive bead is also easy to achieve and control.

(43) Finally, the present disclosure is not limited to the sole variations of these seals, seal supports, sets comprising the seal mounted in its support and thrust reverser provided with such sets, described above only as illustrative examples, but it encompasses, on the contrary, all variants involving the technical equivalents of the described variations as well as their combinations if these fall within the scope of the present disclosure.