CN112303007A

CN112303007A - Improved narrow-runner turbine

Info

Publication number: CN112303007A
Application number: CN201910727657.0A
Authority: CN
Inventors: 时剑
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2021-02-02

Abstract

The improved narrow-flow-passage turbine comprises a shell, a diffuser and a turbine rotor, wherein the turbine rotor is annular, a fluid passage is formed in the annular rotor, the flow cross section of the fluid passage is gradually contracted from inside to outside and is reduced, so that fluid sucked by the turbine rotor at a high rotating speed is sealed in the rotor, the fluid is radially compressed and filled under the action of centrifugal force, cavitation or surging cannot occur, the fluid is sprayed out only from a small hole at the tail end, and the high lift at a small flow rate is realized by matching with the diffuser. The centrifugal pump can improve efficiency under the working condition of small flow and high lift, and simultaneously does not generate cavitation at high speed, and the centrifugal compressor can reach high pressure ratio at small flow and simultaneously does not generate surge at high speed. The application of the impeller fluid conveying mechanism is widened, and the energy consumption is reduced.

Description

Improved narrow-runner turbine

Technical Field

The invention relates to a narrow-runner turbine, and belongs to the technical field of fluid machinery.

Background

The existing impeller type fluid conveying mechanism such as a centrifugal pump has low efficiency under the working conditions of small flow and high lift, and is easy to generate cavitation at high speed, and a centrifugal compressor is difficult to reach a high pressure ratio at small flow and is easy to generate surge at high speed. Therefore, the application of the impeller fluid conveying mechanism is limited, and the energy consumption is increased.

Disclosure of Invention

To overcome the deficiencies of the prior art, the present invention provides an improved narrow flow path turbine comprising a housing, a diffuser and a turbine rotor, the turbine rotor is annular, the annular rotor is provided with a fluid channel, the flow section of the fluid channel is gradually contracted from inside to outside and becomes smaller, therefore, the fluid sucked by the turbine rotor at high rotating speed is sealed in the rotor, the fluid is radially compressed and filled under the action of centrifugal force, cavitation or surging cannot occur, the fluid is sprayed out only from a small hole at the tail end and is matched with a diffuser for use, the diffuser corresponds to the small flow of the narrow-flow-passage turbine, the inlet gap between the blades of the diffuser is also narrow, so that the size difference between the blades and the outlet is conveniently enlarged in a limited space, the difference between the sectional areas is several times to tens of times, most of dynamic pressure can be converted into static pressure, and high lift under small flow is realized. Is particularly suitable for being made into multiple stages. One end of the diffuser blade close to the rotor is tangent to the inner circle of the diffuser to form an oblique angle, so that the fluid between the outer circle of the turbine rotor and the inner circle of the diffuser flows more smoothly.

The centrifugal pump has the advantages that the efficiency of the centrifugal pump can be improved under the working conditions of small flow and high lift, cavitation is not generated at high speed, the centrifugal compressor can reach high pressure ratio under small flow, and surging is not generated at high speed. The application of the impeller fluid conveying mechanism is widened, and the energy consumption is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure, 1, a shell, 2, a diffuser blade bevel angle, 3, a diffuser blade, 4, a fluid passage and 5, a turbine rotor are shown.

Detailed Description

In the figure, a fluid passage (4) is formed in a turbine rotor (5), the flow section of the fluid passage (4) is gradually reduced from inside to outside, diffuser blades (3) are arranged on the periphery of the turbine rotor (5), one end, close to the rotor, of each diffuser blade (3) is tangent to the inner circle of the diffuser to form a diffuser blade oblique angle (2), and a shell (1) is arranged outside the diffuser.

When the turbine rotor (5) works, the turbine rotor is driven by external force to rotate at a high speed, fluid is sucked from the middle part of the turbine rotor (5), and then is sprayed into the diffuser through the fluid channel (4) to be decelerated and boosted and then flows into the shell (1).

The shape of the shell (1) is not limited, and the shell can be a volute, a pipeline, a pressure container or the like, and the shape is within the protection scope of the invention.

Claims

1. The utility model provides an improved generation narrow flow path turbine, includes casing, diffuser and turbine rotor, characterized by: the turbine rotor is annular, and the annular rotor is provided with a fluid channel, and the flow cross section of the fluid channel is gradually reduced from inside to outside.

2. The improved narrow flow path turbine of claim 1 wherein the end of the diffuser blades adjacent the rotor is beveled tangentially to the diffuser inner circle.