JPS59120701A - Rotary machine - Google Patents

Abstract

PURPOSE:To decrease a loss of steam leaking in the peripheral side of a machine so as to improve its output efficiency, by fitting a rotary unit, in which rotary unit moving blades are implanted, to be mounted on the center of a stationary shaft, in which stationary blades are implanted, and injecting steam from the center part in one end of the rotary unit. CONSTITUTION:A rotary shaft 3 comprising divided annular members 3a-3d is provided so as to envelop a stationary shaft 1, to which stationary blades 2a, 2b are fitted to be fixed, and rotary unit moving blades 5a-5c are implanted in the internal peripheral surface of each annular member 3a-3d. A nozzle 8 connected to the stationary shaft 1 through a stay is arranged in the annular member 3a in one end of the rotary shaft 3, while an output shaft 6 is connected to the annular member 3d in the other end through coupling parts 7a, 7b. Generated steam in a boiler is guided from a steam introducing pipe 12 to a nozzle chamber 8a and injected to the moving blades 5a-5c, turning the rotary shaft 3 and operating a machine so that rotary energy is taken out from the output shaft 6.

Description

[Detailed description of the invention] A conventional rotating machine is shown in Figure 1.

Rotating body motion Raf: The installed rotating shaft (co-rotating rotor) b is located at the center, and the coaxial shaft b is supported by the support body d via bearings Cl and C2. Then, centering on the rotation axis b,
A casing f with a stator vane link e installed is mounted on the ring. In addition, the output shaft 7h is manually powered steam supplied from a steam source (not shown in the figure).

1 is the sole material extruded from the stationary part of the exhaust gas discharged from the exhaust duct j.

Such conventional rotating machines have the drawback of leakage losses.

In the present invention, rotary rotor blades are installed around a stationary member such as a stationary shaft in which stationary blades are installed. The purpose of this is to reduce leakage loss on the outer periphery by making the outer periphery a sealed structure.
However, it still provides a rotary machine that can be separated into pieces.

Hereinafter, the first to first embodiments of the present invention will be explained with reference to FIGS. 2 to 5.
A detailed explanation will be given using an example illustrated in the drawings.

In FIGS. 2 to 5, 21 is the static 1F axis, 2a.

2b is the stator blade embedded in the stationary shaft lK, and 3 is the rotating shaft.

The rotating shaft 3 has a connecting structure with split annular bodies 3a, 3b, (c, 3d). 4a and 4b are bearings that pivotally support the rotating shaft 3, and 5a, 5b, and 5cid split annular bodies 3J' ，
3c, 3d rotary rotor blades implanted in the circumferential direction,
6, an output shaft connected to the rotating shaft 3 by bolts or the like at the nozzle ring portions 7a, 7b; 8, a nozzle; 2. The area indicated by the dotted chain line, 8. a is the nozzle chamber, 8b is the nozzle 8
The column connecting the stationary shaft with the stationary shaft, 9 is installed from the stationary part:
・11:・ The long-drawn aluminum material, 1'Oa□, ・ii□Ob is ringed in the i-ri □, one rotation of the rotating shaft □3, and the sink is outside the ledge. ,,Iranjij,,la,llb are connected by bolts or the like. 12 is the steam introduction pipe I, 13
1 tokidaku□, □4a, 14□, □4o, □4d.

14e, 14f, 44g are casings 10a, 10b
support stand.

15 is a bolt that connects the casing 10a and the nozzle 8. ,,: Figure 4 and Figure ! 5. Armor + Trunk: This is an example of assembly procedure for the stop shaft 1 and rotating shaft 8.

1 □ 1 Figure 4 shows the first part of the rotary shaft 1, that is, the divided annular body 3a, set on the stationary shaft 1, and the rotor blade 5a is embedded in the divided annular body 3b to the pollution-prone annular body 3a. It shows the process of combining.

FIG. 5 further shows the process of implanting the stationary blade 2a on the stationary shaft l. In this embodiment, in which the rotating part and the stationary part are sequentially combined, high-energy fluid such as steam is supplied from the boiler (not shown in Figure 2) to the nozzle chamber through the steam introduction pipe 12. Lead to 8a, Tsuzuzu:,' ・Moving blade! A 4'' is injected into 5b and 5c, and the high-energy flow □'' flows from stationary blade 2b to rotor blade 5c, thereby rotating the rotating shaft 3, converting fluid energy into rotational energy, and rotating the output shaft. The rotational energy is extracted from 6.

In this way, since the movable shafts R5a, sb, and 5c are inserted into the rotating shaft 3, which is the outer periphery, and are twisted, the movable shaft 5.

The centrifugal stress of 5b and 5c is basically compressive stress in each part, so even if a scattering condition occurs, it will be 4 times lower than the conventional structure! There is an advantage that ≦,,i,,. , t, outside, circumferential side: that is, nozzle 8° rotation axis 3. Since the output shaft 6 allows a sealed structure, leakage loss on the outer circumferential side can be reduced.

As described above in detail in the examples, two aspects of the present invention have been described.

Since the rotor blades are installed around the outer circumference of the rotating shaft that constitutes the ring, the centrifugal stress of the rotor blades is basically compressive stress in each part, so in the unlikely event that a flying condition occurs, -It has the advantage of being less likely to scatter compared to conventional structures.

Furthermore, since the outer circumferential side can have a sealed structure, there is an advantage that leakage loss on the outer circumferential side can be reduced compared to the conventional one.

Note that although the present invention has been explained using a turbine in the embodiment, it can also be applied to other Takamatsu machines.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional turbine, and FIGS. 2 to 5 show embodiments of the present invention. Figure 2 is a longitudinal sectional view, and Figure 3 is the nozzle part - large mouth. FIGS. 4 and 5 are assembly explanatory views. 1... Stationary shaft, 2a, 2b... Stationary blade, 3...
Rotating shaft, 3a. 3b, 3a, 3d---split ring body, 4a
,4. b □-・Bearing, 5a, 5b. 5c... Rotating body rotor blade, 6... Output shaft, -7a, 7
b... Compling part, 8... Nozzle, 8a...
・Nozzle chamber, 9...Seal, LOa, 10b...
Casing, lla, 1lb-flange, 12...
Steam introduction pipe, 13...exhaust duct), '14''a. 14b, 14c, 14d, 14e, 14f, 14g=.
Support stand, i”s-:”: Bolt. :... Drifting 4

Claims (1)

[Scope of Claims] A rotary body having a rotary blade installed thereon is ring-mounted around a stationary member such as a stationary shaft having a stationary blade installed therein. A rotating machine characterized in that the L rotating body is further surrounded by a stationary chamber.