JPS58148275A - Tow-stage water-turbine - Google Patents

Abstract

PURPOSE:To get the supporting structure of a highly reliable guide vane, by dividing a support ring into two parts, a bottom ring and an upper discharge ring, while securing the bottom ring and an outer return vane to a staring tight enough. CONSTITUTION:The part of a conventional support ring 9' securing a guide vane 8 is divided into two parts, i.e. a bottom ring 9 and an upper discharge ring 10, and the bottom ring 9 required to support the guide vane 8 most rigidly is secured tight to a staying 7 being stable in structure in advance, then both inner and outer return vanes 11 and 12 are connected fast to the staying 7. As doing like this, the guide vane 8 is supported in a state of keeping sufficient strength capable of warding off any damage to performance and operatability.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a 2JR pump-turbine, and more particularly to a two-stage pump-turbine having an umbrella wheel inner vane whose upper launch can be opened and closed.

Multi-stage pump turbines with multiple launches on one shaft are
Figure 1 is a vertical cross-sectional view of an example of the two-stage pump turbine, and 1 is the upper stage runner;
2 is the lower runner, 3 is the water wheel shaft, 5 is the casing, 6 is the stay vane, 7 is the stay ring, 11 is the inner return blade,
12 is an outer return blade, 18 is a lower discharge ring, and 2G is a suction pipe, most of which do not have guide blades installed, and the inner return blade 11 that guides water from the upper runner 1 to the lower runner 2 is placed on the upper runner 1. It has a simple structure in which it is held between a nine-upper cover and a lower discharge ring 18 provided below the lower runner 2.

On the other hand, the two having guide vanes which are the object of the present invention
A stage pump water turbine has a structure in which the water pressure applied to the guide vanes is absorbed by an upper cover and a support ring that supports the guide vanes.

FIG. 2 is a longitudinal cross-sectional view of a conventional two-stage pump turbine having this type of guide vanes. In the figure, the same parts as in FIG. 8 is a guide vane, 9' is a support ring, and the outer return vane 12 is integrated with the lower discharge ring 18 and connected to the stay ring 7. In a three-stage pump turbine having a vane, the guide vane support cylinder 9' is connected to the lower discharge cylinder 18 by a bolt passing through the vane.
Only the inner barbed feathers 41111KII are connected, and there is a problem in tonicity. In other words, the diameter of the bolts that fix the inner return vane 11 is limited by the vane thickness IK, and the number of bolts is also limited by the vane thickness IK.
It is not preferable in terms of strength because it is restricted.

The purpose of this mtso is to solve the above-mentioned problems and provide a two-stage pump-turbine with a pinwheel configuration in which the guide vanes are firmly supported.

The present invention has a configuration in which the upper runner has an inner wing at which is supported by a support ring and can be opened and closed, the lower runner includes an inner return wing and an outer return wing, and both the runners are connected via a stay ring. In the two-stage pump turbine, the support ring is divided into a bottom ring and an upper discharge ring, the bottom ring and the outer return vane are fixed to the stay ring, and the inner return vane and the upper discharge ring are fixed to each other. and is further connected to the outer return blade.

Hereinafter, one embodiment of the present invention will be explained based on the trjA plane. FIG. 3 is a longitudinal cross-sectional view of the 2R pump-turbine of the present invention.
Identical parts, i, or parts that act in the same manner as in the figures and FIG.
is an upper discharge ring, and 13 to 17.19 are tightening bolts.The difference from the conventional 2R pump turbine shown in FIG. It is divided into an upper discharge ring 1O, a bottom ring 9 and an outer return blade 1.
2 is fixed by the stay ring 7 by the tightening pole) 19, and the inner return blade 11 and the upper discharge ring 1
0 are mutually fixed by tightening bolts 16 and 17, and are tightened and connected to the outer return blade 12 by a tightening pole 13. In addition, the outer return blade 18
is connected to the staying ring 7 through the tightening bolt 14 and 1BIC, and is also connected to the lower discharge ring 18, and furthermore, the discharge pipe is OK! It is threaded.

When the water in the casing 5 hits the water wheel by this 2R pump turbine, the water in the casing 5 passes through the stay cylinder 7 and acts on the upper launch IK due to the 8% guide vanes, causing it to rotate in the st direction and being returned inward to the 1st direction. Feather 11 and outer barbed @12
The lower launcher 2Kf'l is then used to apply even greater rotational force to the rotating part, and then is discharged from the suction pipe 20 to the lower reservoir through the small discharge channel.

When the pump is in operation, the generator motor is reversed, and the water from Kusaka Pond is guided through the discharge channel and suction pipe 20 to the lower runner 2. The centrifugal force of the upper launcher pumps the water into the casing.

In this way, a large amount of water pressure acts on the guide vane 8 during both the operation of the water turbine and the operation of the pump.
The bottom ring 9 is divided into two parts, the bottom ring 9 and the upper discharge ring 1G, and the bottom ring 9, which needs to be supported most firmly by the guide vanes 8, is fixed to the stay ring 7, which has a stable structure, and The steering wheel 7 has an inner and outer turning blade 11.121-9, which is firmly connected.
The guide vane 8 is supported in a sufficiently strong state without impairing performance and workability.As explained above, according to the present invention, a highly reliable guide vane support structure is provided. It can produce practical effects as a two-stage pump water turbine.

[Brief explanation of drawings]

1 and 2 are longitudinal sectional views of a conventional 211L pump-turbine, and FIG. 3 is a longitudinal sectional view of a two-stage pump-turbine according to an embodiment of the present invention. 1... Upper runner, 2... Lower runner, 3... Water wheel shaft, 5... Casing, 7... Staying, 8
... Guide vane, 9'... Support ring, 9... Bottom ring, 10... Upper discharge ring, 11
...Inner return blade, 12...Outer return blade, 18.
・Lower discharge pipe, 20...Suction pipe.

Claims (1)

[Claims] L A 2R pump in which the upper stage launch is supported by a support ring and has a guide vane that can be opened and closed, the lower stage launch has an inner return vane and an outer return vane at, and both the runners are in contact with I11 via a staying ring. In the water turbine, the support ring is divided into a bottom ring and an upper discharge ring, the tom ring and the outer return blade are fixed to the stay ring, and the inner return blade and the upper discharge ring are fixed to the stay ring. A two-stage pump water turbine, characterized in that they are fixed to each other and are further attached to the outer return blades.