JP2564172Y2 - Stationary wing fixed structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure for fixing a stationary blade used in a compressor constituting a jet engine of an aircraft or the like to a ring-shaped disk. That can prevent the

[0002]

2. Description of the Related Art A jet engine of an aircraft or the like is equipped with a compressor for compressing air entering from the front of the engine. In general, this compressor has a configuration in which a large number of rotors are provided and a high-speed rotating rotor is superposed in a number of stages in the axial direction, and a stator is provided between the rotors. In this stator, the base ends of a large number of stationary blades are implanted at predetermined intervals in the circumferential direction on the outer periphery of a ring-shaped stationary disk, and the distal end of the stationary blade is fixed to the outer case of the engine via a fixing ring or the like. The configuration is as follows.

Conventionally, when the above-mentioned stationary blades are implanted and fixed on the outer peripheral portion of a fixed disk having a ring shape, a large number of mounting grooves 2 are formed on the outer peripheral surface 1a of the fixed disk 1 as shown in FIG. Are formed at predetermined intervals along the circumferential direction, and stationary blades 3 are inserted into these mounting grooves 2..., And these mounting grooves 2 and the inner peripheral side of the fixed disk 1 where the mounting grooves 2 open. The stationary blades 3 are fixed to the fixed disk 1 by filling the resin 1b with the resin 5.

[0004]

When filling (press-fitting) the resin 5 into the mounting groove 2 and the inner peripheral side 1b of the fixed disk 1, the resin 5 must be spread over the resin 5 reliably. Although a low-viscosity silicone mold resin having excellent fluidity is used, the resin 5 is liable to leak from the upper opening of the mounting groove 2 because of excellent fluidity.
Until curing by curing, it was necessary to close the upper opening of the mounting groove 2 with a jig 6 or tape.

Since there are a large number (about 100) of the mounting grooves 2, it takes time and effort to mount the jig 6 and the like.
Since the jig 6 and the like must be removed after the curing, the attaching and detaching work of the jig 6 and the like requires a very large amount of labor and time. Also, it is difficult to completely prevent resin leakage even by using a jig 6 or the like.
When the resin 5a leaks and adheres to the outer peripheral surface 1a of the fixed disk 1 in the vicinity of the above, it takes time to remove the resin 5a.

The present invention has been made in view of the above circumstances, and provides a stationary blade fixing structure capable of preventing resin leakage from a mounting groove without using a resin leakage preventing jig or the like. It is an object.

[0007]

In order to achieve the above object, a stationary blade fixing structure according to the present invention comprises a plurality of mounting grooves formed on an outer peripheral surface of a ring-shaped stationary disk and into which the stationary blade is inserted. A resin filling the inner peripheral side of the fixed disk where the mounting grooves are opened, a low-viscosity resin filling the inner peripheral side, and a high-viscosity resin filling the mounting grooves and having a higher viscosity than the low-viscosity resin. It is composed of two types, namely, a viscous resin.

[0008]

In the stationary blade fixing structure of the present invention, the high-viscosity resin filled in the mounting groove hardly flows in the mounting groove due to its high viscosity. No leakage from the upper opening. Therefore, since it is not necessary to take measures to prevent resin leakage, it is possible to greatly reduce the labor required for the installation work of the stationary blade, and
Since there is no resin leakage, the finishing work can be greatly reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the stationary blade fixing structure of the present invention will be described below with reference to FIGS. In these figures, the same components as those shown in FIG. 5 are denoted by the same reference numerals. The fixed disk 1 has a ring shape. As shown in FIGS. 1 and 2, an inner ring 8 is provided inside an outer ring 7, and these are fixed between the rings 7 and 8. It has a configuration in which a connecting wall 9 is formed on one end face side.

On the outer peripheral surface 1a of the outer ring 7, a large number of mounting grooves 2 are formed at predetermined intervals along the circumferential direction. Each of the mounting grooves 2 has a slit shape extending slightly inclining with respect to the axial direction of the fixed disk 1.
And is opened to the inner peripheral surface 7b of the outer ring 7. The mounting groove 2 is reduced in diameter by a large-diameter portion 2a opening on the outer peripheral surface 1a of the outer ring 7 and an annular convex portion 2b protruding from the lower peripheral wall of the mounting groove 2.
And a small-diameter portion 2c opening on the inner peripheral surface 7b.

A stationary blade 3 is inserted into each of the mounting grooves 2 with its lower end protruding from the inner peripheral surface 7b of the outer ring 7, and the outer ring 7 including the inner peripheral surface 7b is inserted.
In the inner peripheral side 10 of the mounting groove 2, that is, in the space 10 formed between the two rings 7 and 8, the silicone-based low-viscosity resin 5 having excellent fluidity is filled up to the small diameter portion 2 c of the mounting groove 2. Is filled. On the other hand, the large-diameter portion 2 a of each mounting groove 2 is filled with a high-viscosity resin 12 having a higher viscosity than the low-viscosity resin 5. The stationary blade 3 inserted in the mounting groove 2 is fixed by the low-viscosity resin 5 and the high-viscosity resin 12. The inner peripheral surface of the inner ring 8 is also filled with the low-viscosity resin 5, but this is not for fixing the stationary blade 3 but for adjusting the gap with the counterpart. is there. The tip of each of the stationary blades 3 is shown in FIG.
As shown in FIG. 4, it is fixed to the outer case of the engine by a mounting bracket 13, a screw 14 and the like via a fixing ring and the like.

In the stationary blade fixing structure constructed as described above, the large-diameter portion 2a of the mounting groove 2 into which the stationary blade 3 is inserted is filled with the high-viscosity resin 12, that is, the non-flowable resin. Therefore, the high-viscosity resin 12 does not flow in the mounting groove 2 and leak from the upper opening. Therefore, unlike the related art, there is no need to use a jig 6 for preventing resin leakage, a tape, or the like, so that the labor required for attaching the stationary blade 3 can be significantly reduced. In addition, since there is no resin leakage, the finishing work can be greatly shortened, and the finished state is also excellent.

Further, a space 10 formed between the outer ring 7 and the inner ring 8, that is, a wide area where there is no possibility of resin leakage, is filled with a low-viscosity resin 5 having excellent fluidity as in the prior art. As a result, the resin spreads quickly and the time required for filling the resin is not inferior to the conventional case.

[0014]

As described above, the stationary blade fixing structure of the present invention has a large number of mounting grooves formed on the outer peripheral surface of the ring-shaped fixed disk and into which the stationary blades are inserted, and these mounting grooves are formed as follows. Two types of resins are used: a low-viscosity resin that fills the inner peripheral side of the fixed disk that opens, a low-viscosity resin that fills the inner peripheral side, and a high-viscosity resin that fills the mounting groove and has higher viscosity than the low-viscosity resin. It is constituted by. Therefore, since the high-viscosity resin filled in the mounting groove has a high viscosity, it hardly flows in the mounting groove, and therefore does not leak from the upper opening of the mounting groove. Therefore, unlike the related art, there is no need to use a jig or tape for preventing resin leakage, so that the labor required for the installation work of the stationary blade can be greatly reduced. Also, because there is no resin leakage,
The finishing work can be greatly shortened, and the finished state is also excellent.

Further, the inner peripheral side of the fixed disk, that is, a wide area where there is no risk of resin leakage, is filled with a low-viscosity resin having excellent fluidity as in the prior art. In addition, the time required for filling the resin is not inferior to the conventional case.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a stationary blade fixing structure of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a front view of a main part showing a state in which a stationary blade is inserted and fixed in a mounting groove.

FIG. 4 is a perspective view of a main part showing a state where a stationary blade is inserted and fixed in a mounting groove.

FIG. 5 is a sectional view showing an example of a conventional stationary blade fixing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed disk 2 Mounting groove 3 Stator blade 5 Low viscosity resin 7 Outer ring 8 Inner ring 10 Inner circumference side 12 High viscosity resin

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-255201 (JP, A) JP-A-63-50604 (JP, A) Fully open Showa 60-118307 (JP, U) Really open show 58- 57505 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of mounting grooves are formed at predetermined intervals along a circumferential direction on an outer peripheral surface of a fixed disk having a ring shape, and stationary blades are inserted into the mounting grooves, respectively. A mounting groove and a stationary blade fixed structure fixed to the fixed disk by a resin filled in the inner peripheral side of the fixed disk where the mounting groove opens, wherein the resin fixing the stationary blade is: A stationary blade fixed by two types: a low-viscosity resin filled on the inner peripheral side of the fixed disk, and a high-viscosity resin filled in the mounting groove and having a higher viscosity than the low-viscosity resin. Construction.