JP2706347B2 - Radiation turbine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation turbine, and more specifically, a radiation impeller is attached to a shaft end of a rotating shaft, and the radiation impeller is mounted on an outer periphery of the radiation impeller. The present invention relates to an improvement of a radiation turbine in which a scroll is provided so as to surround and a diffuser is provided downstream of the radiation impeller.

2. Description of the Related Art As shown in FIG. 2, a conventional radiation turbine of this type includes a radiation impeller 2 attached to a shaft end of a rotating shaft 1 and an outer periphery of the radiation impeller 2. Some scrolls are provided so as to surround them, and the diffuser 5 provided downstream of the radiation impeller 2 is a main member.

In this radiation turbine, the fluid that has entered the scroll 3 from the fluid inlet flows while increasing the speed in the scroll 3 and flows into the rotor blade 4 as a flow having a large circumferential speed.

However, at this time, when the fluid is composed of a light gas and heavy droplets, the large heavy droplets are not accelerated, flow at a lower speed than the gas, and move. Droplets of several tens μm or more that cannot collide with the wing 4 and cannot get on the flow of gas adhere to the wing surface of the moving blade and are accumulated as large droplets, which are blown into the scroll 3 by centrifugal force. It is.
In this way, a fixed amount of liquid droplets always stay between the scroll 3 and the moving blade 4, consuming the rotational energy of the moving blade 4 and lowering the efficiency.

Furthermore, when a large amount of droplets enter, the rotation of the bucket 4 is reduced, and a large amount of droplets flow out to the diffuser 5.

The present invention has been conceived in order to solve such problems of the prior art, and prevents the efficiency from being reduced by droplets,
It is an object of the present invention to provide a new radiant turbine capable of preventing a large amount of droplets from passing through the turbulent turbine.

Means for Solving the Problems To achieve the above object, according to the present invention, a radiation impeller is attached to a shaft end of a rotating shaft, and a scroll is provided around the radiation impeller to surround the same. In the radiation turbine, the scroll is divided into two divided scroll portions by a partition extending in a direction substantially perpendicular to the axis of the rotating shaft, and an opening of one of the divided scroll portions is formed as an opening of a blade inlet. A fluid inlet is provided in the other divided scroll portion, which is positioned so as to be substantially coincident and is shifted in the axial direction of the rotating shaft so as not to overlap with the rotor blade inlet, and a communication is provided in which the divided scroll portion communicates with the inner peripheral side of the partition wall. A flow path is provided.

In the above means, the fluid introduced into the other divided scroll portion, which is shifted in the axial direction of the rotating shaft so as not to overlap with the blade entrance, utilizes the centrifugal force at the divided scroll portion to separate liquid droplets. At the same time, while maintaining the circumferential velocity created by the acceleration in the divided scroll portion, the fluid is guided into one of the divided scroll portions via the communication flow path, and further guided to the moving blade.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. Note that the same reference numerals are used for components common to those of the related art.

FIG. 1 is a schematic longitudinal sectional view of a main part of a radiant flow turbine of the present invention.

As shown in the figure, in this radiation turbine, a radiation impeller 2 is attached to a shaft end of a rotating shaft 1, and a scroll 3 is provided around the radiation impeller 2 so as to surround the radiation impeller 2. Although the diffuser 5 is provided on the downstream side of the flow impeller 2 in the same manner as the conventional one, the scroll 3 is divided into two by a partition wall 6 extending substantially perpendicular to the axis of the rotating shaft 1. One of the divided scroll portions 7 is opened so as to substantially coincide with the moving blade inlet 8, and the other divided scroll portion 9 is rotated so as not to overlap with the moving blade inlet 8.
A fluid inlet (not shown) is provided at a position shifted in the axial direction, and a communication channel 10 for communicating the divided scroll portions 7 and 9 is provided in a partition wall 6 for dividing the scroll 3 into two parts. Different from the ones. The communication channel 10 is provided on the inner peripheral side of the partition 6.

Therefore, the radiation turbine of this embodiment has the following operations.

That is, the fluid introduced into the divided scroll portion 9 from the flow path inlet (not shown) is given a circumferential velocity, and separates and extracts droplets using centrifugal force, and at the same time, generates a circumferential velocity created by acceleration. While being maintained, it is guided into the adjacent divided scroll portion 7 through the communication flow path 10 and further guided from the moving blade inlet 8 to the moving blade 4, and the moving blade 4 is driven with high efficiency. And the fluid is diffuser 5
Is discharged to the exit.

As described above, according to the present invention, one of two scrolls provided on the outer periphery of the radiation impeller is opened so as to substantially coincide with the entrance of the radiation impeller, and does not overlap with the blade entrance. The other fluid inlet which is shifted in the axial direction of the rotating shaft is provided so that the inner peripheral side of the partition dividing the scroll into two is communicated by the communication flow path. Separation and recovery of the liquid droplets contained therein can be facilitated, the efficiency can be prevented from lowering due to the liquid droplets in the working fluid, and erosion can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a main part of a radiation turbine according to an embodiment of the present invention, and FIG. 2 is a schematic longitudinal sectional view of a principal part of a conventional radiation turbine. 1 ... rotating shaft, 2 ... radiation impeller, 3 ... scroll,
4 ... rotor blade, 5 ... diffuser, 6 ... bulkhead, 7, 9 ...
... divided scroll part, 8 ... blade entrance, 10 ... communication flow path.

Claims (1)

(57) [Claims] 1. A radiating impeller is attached to a shaft end of a rotating shaft,
In a radiation turbine in which a scroll is provided so as to surround the outer periphery of the radiation impeller, the scroll is divided into two divided scroll portions by a partition extending in a direction substantially perpendicular to the axis of the rotating shaft, The opening of one of the divided scroll portions is made substantially coincident with the opening of the moving blade entrance, and the other divided scroll portion which is shifted in the axial direction of the rotating shaft so as not to overlap with the moving blade entrance is provided with a fluid inlet, A radial flow turbine, wherein a communication flow path for communicating each divided scroll portion is provided on an inner peripheral side of the partition wall.