JPS59122703A - Moving blade for rotary machine - Google Patents

Abstract

PURPOSE:To make the manufacturing and embedment of a blade ever so easy, by dividing a moving blade into plural pieces at a radial dividing surface, while constituting the moving blade by means of coupling these divided ones together. CONSTITUTION:A moving blade 1a is divided into three structural bodies 1a1, 1a2 and 1a3, while these divided bodies are coupled together by the way of dovetailing joint parts 3a1 and 3a2 and made up into the moving blade 1a. Doing like this, even when the blade is enlarged in length, each of these divided elements can be made smaller so that its manufacturing and embedment can be made ever so easy.

Description

[Detailed description of the invention] It is something to do.

Figures 1 to 3 show the rotor blades of conventional rotary machines of this type.
This will be explained with reference to the figures.

In Figs. 1 to 3, 01 is a wing, and 02 is a wing root.

03 is a blade profile portion.

In this way, the rotor blades of conventional rotary machines are made of one blade, so the blades become long and large.

As the weight of the wing increases, problems arise in the production of the wing or in the work of installing the wing. For example, when making wings by forging,
This requires equipment with an extremely large forging capacity, and it is too heavy or too large for a single worker to install the wings.

There were drawbacks such as the fact that even a single wing could not be easily implanted.

The present invention has been proposed in view of the above-mentioned conventional drawbacks, and is characterized in that the blade is divided into a plurality of parts in the longitudinal direction, that is, in the radial direction of the rotating machine, and these parts are combined. Each segment is small and relatively light, making the wing easier to manufacture and install, and solving the drawbacks of the prior art.

The present invention will be specifically explained below based on the embodiments shown in FIGS. 4 to 33. However, in addition to the one in which the blade is divided into eight parts as in this embodiment.

It goes without saying that the wing of the present invention may be made by dividing into two or into eight or more parts.

4 to 8 show a first embodiment of a wing according to the present invention, and FIG. 4 is a side view of the wing, and FIG. 5 is a side view of the wing.

Figures 6, 7, and 8 are B- in Figure 4, respectively.
It is a sectional view along the B line, the C-0 line, the D-D line, and the E-E line.

In FIGS. 4 to 8, the blade 1a according to the present invention is
The wing profile is composed of a divided structure 1a12, a divided structure 1a29, a divided structure 1a3, and a blade root 2a that is integrated with the divided structure 1a3. The one-divided structure 1al and the divided structure 1a2 are coupled at a dovetail fitting portion 8a1 by a dovetail groove provided in the divided structure 1a2 and a reed protruding from the divided structure 1al. Also.

The divided structure 1a2 and the divided structure 1a3 are divided structure 1.
Two dovetail grooves provided in a3 and dividing structure 1a2
The two ribs protruding from the dovetail fitting part f3a
It is connected by 2.

Note that the dovetail groove and the recess may be connected to the reed joint fitting portions 8J and 8b2 in the opposite direction as in the second embodiment of the present invention shown in FIGS. 9 to 13.

Figures 14 to 18 show a third embodiment of the present invention;
Figure 4 is a side view, Figures 15 and 16.

Figures 17 and 18 are J-J in Figure 14, respectively.
FIG. 3 is a cross-sectional view taken along lines K-, L-L, and M-M.

In FIGS. 14 to 18, the blade 1c according to the present invention includes a divided structure 1c11, a divided structure 1c21, and a divided structure 1c3, which constitute the blade profile portion.

It consists of a blade root 2c which is integral with the divided structure 1c3. The two-split structure 1c1 and the split structure 1c2 are coupled by a bulb-shaped fitting portion 8cl formed by a bulb-shaped groove provided in the split structure 1c2 and a bulb-shaped projection protruding from the split structure 1cl. Also, 1 divided structure 1
c2 and the divided structure 1c3 are connected by a bulb-shaped fitting portion 8'c2 formed by two bulb-shaped grooves provided in the divided structure 1c3 and two bulb-shaped projections protruding from the divided structure 1c2. There is.

Note that the nine bulb-shaped grooves and bulb-shaped protrusions are arranged in the opposite direction of the bulb-shaped fitting portion ad1. as in the fourth embodiment of the present invention shown in FIGS. They may be bonded by ad2.

24 to 28 show a fifth embodiment of the present invention, in which FIG. 24 is a side view, and FIGS. 25, 26, 27, and 28 are taken along lines R-R in FIG. 24. , s-s
FIG.

In FIGS. 24 to 28, one wing 1e according to the present invention is shown.
are the divided structure 1el, the divided structure IC21, the divided structure 1e3, and the same divided structure 1e3, which constitute the wing profile part.
The blade root 2e is integral with the blade root 2e. The 9-divided structure 1el and the divided structure 1e2 are the divided structure 1e2.
Christmas tree type groove and dividing structure 1 provided in
They are connected by a Christmas tree-shaped fitting portion 8e1 formed by a Christmas tree-shaped projection protruding from e1.

Furthermore, the one-divided structure 1e2 and the divided structure 1c3 are fitted in a Christmas tree shape using two Christmas tree-shaped grooves provided in the divided structure 1e3 and two Christmas tree-shaped projections protruding from the divided structure 1e2. They are connected by a portion 8e2.

In addition, the Christmas tree-shaped groove and the Christmas tree-shaped protrusion are arranged in the opposite direction as in the sixth embodiment of the present invention shown in FIGS. 29 to 33.
1. They may be bonded by ar2.

As specifically explained above, according to the present invention, even if the blade becomes longer and larger, there is no need to expand the capacity of the casting machine, and the 9-divided structure facilitates the work of installing the blade. It has many advantages.

[Brief explanation of drawings]

Figure 1 is a front view of the rotor blade of a conventional rotating machine. FIG. 2 is a side view thereof, FIG. 8 is a sectional view taken along line A-A in FIG. 2, FIG. 4 is a side view of the wing showing the first embodiment of the present invention, and FIGS. Figure 8 shows line B-B and line C-C in Figure 4, respectively. 9 is a side view of a wing showing the second embodiment of the present invention, and FIGS.
The figures are cross-sectional views taken along lines FF, G-Q, -H, and 1-I in Fig. 9, respectively, and Fig. 14 is a side view of a wing showing a third embodiment of the present invention. , FIGS. 15 to 18 are J-J line, Ni-ni line, and L-1 in FIG. 14, respectively.
, line MM, and FIG. 19 is a side view of a wing showing the fourth embodiment of the present invention, and FIGS. 20 to 28 are cross-sectional views taken along line N-N in FIG. 0-0 line, P-P
24 is a side view of a wing showing the fifth embodiment of the present invention, and FIGS. 25 to 28 are cross-sectional views taken along lines R-R and s in FIG. 24, respectively. 29 is a side view of a wing showing the sixth embodiment of the present invention, and FIGS. 80 to 88 are sectional views taken along lines -s, T-T, and U-U. V-F line. It is a sectional view along the w-w line, the x-x line, and the y-y line. la, lb, lc, ld, le, lf-wing +
'al + 1a2 +La3. ibl,
lb2. 1b3+ IC1i+ 1e2.
la3゜1dl, 1d2. 1d3. lel
, 1c2. 1e3. lfl. tr2, 1f3 --- split structure, 2a, 2
b, 2c, 2d, 2e. 2f-・-wing root+ ””+1 ”a21 8bl+
81+21 3CI. 8c2. adl, 8d2. 8el, 8e
4. 8f1, 8f2 ・0Φ fitting part. Therefore 1 ρ≦ Figure 3 ``A □ θ2 Ya, = - /θ/ ? t! J2 Ward 4th Circle Figure 9 Curse Figure 24 Front 25 Figure 2'?

Claims (1)

[Claims] A rotor blade for a rotating machine, characterized in that it is constructed by dividing the rotating machine into a plurality of pieces along a radial dividing plane and joining the pieces together.