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Pump/turbine system

A water pump turbine and water turbine technology, applied in mechanical equipment, hydroelectric power generation, engine components, etc., can solve problems such as low efficiency and poor cavitation characteristics, and achieve good efficiency and low power

Active Publication Date: 2014-03-05
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only is the efficiency lower at part load, but the cavitation characteristics are also worse

Method used

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  • Pump/turbine system
  • Pump/turbine system
  • Pump/turbine system

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] figure 1 The structure of the shown pump-turbine device is as follows: the water turbine 1 has a water turbine impeller 1.1, including a plurality of working blades. The water turbine wheel 1 . 1 is embodied in a rotationally fixed manner together with the shaft 3 , the axis of rotation 7 of which is arranged rotatably. The water turbine impeller 1.1 is surrounded by the water turbine spiral housing 1.2. Furthermore, the rims of the rotor blades are attached upstream of the turbine wheel 1.1.

[0026] The water turbine 1 has a water turbine suction pipe 1.5. It is connected downstream of the working blades and includes an inlet diffuser with an elbow connected to the inlet diffuser and a pipe (Rohrleitung) connected to the elbow, which expands the water flow in the direction of flow Cross-section.

[0027] Here, the water pump 2 is directed towards the water turbine 1 . The latter means that two hydraulic machines are arranged axially adjacent without any electro-g...

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Abstract

The invention relates to a pump / turbine system, comprising a turbine having a turbine rotor and a spiral turbine casing; a pump having a pump impeller and a spiral pump casing; an electric machine, which has a drive connection to the shaft or can be brought into such a connection; and a hydraulic short-circuit can be produced between turbine and pump. The invention is characterized by the following features: the turbine has a higher rated output than the pump.

Description

technical field [0001] The invention relates to a pump-turbine arrangement of the type defined in detail in the preamble of claim 1 . Furthermore, the invention relates to a method for operating a pump-turbine arrangement in a turbine operating state of the type defined in detail in the general concept of claim 7 . Background technique [0002] Among them, a Francis turbine or a Pelton turbine is considered as the turbine. In addition, both the water pump and the water turbine can be implemented as single-stage or multi-stage, so that a combination of a single-stage water turbine and a multi-stage water pump, or a combination of a multi-stage water turbine and a single-stage or multi-stage water pump can be considered. [0003] The pump-turbine device of the pumped-storage power station has two operating modes, that is, a water turbine operating state and a water pump operating state. In the latter operating state, the water pump pumps water from the lower cistern into the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B3/10F03B13/06
CPCF03B3/106Y02E10/223F03B3/10Y02E10/22Y02E60/17F03B13/06Y02E10/20Y02E60/16
Inventor 曼弗雷德·施图默尔
Owner VOITH PATENT GMBH
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