A method for alleviating the static interference of water pump and turbine and the vibration of workshop
A pump-turbine, dynamic and static technology, applied in the direction of machine/engine, energy saving and emission reduction, mechanical equipment, etc., can solve problems such as strong vibration, and achieve the effect of reducing dynamic and static interference and strong operability
Inactive Publication Date: 2019-08-09
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +2
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the actual situation is that these power plants often have pressure fluctuations twice the blade frequency in the fixed guide vane area, and cause 2f pressure fluctuations in the roof and other parts. r Frequency vibration, some power stations also produce strong vibration of the plant at this frequency
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0018] The present invention proposes a method for alleviating the static interference of the water pump turbine and the vibration of the factory building, which includes the optimization of the following aspects of the water pump turbine:
[0019] 1) Optimizing the number Z of runner blades of the pump turbine r and the number of movable guide vanes Z g The relationship between, strictly avoid the movable guide vane number Z g is the number of runner blades Z r Integer multiples of , that is, guarantee Z g / Z r ≠ integer; and try to make Z g / Z r away from integers, in a preferred embodiment one can make Z g / Z r +0.5 is close to an integer, or makes Z g / Z r Close to 1.5, 2.5, 3.5, etc.
[0020] 2) Distribute the movable guide vane to the circle diameter D 0 and runner high pressure side diameter D 1 Ratio (D 0 / D 1 ) from the convent...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for reducing rotor-stator interaction of a pump turbine and plant vibration. The method is characterized by comprising the optimization of the flowing two aspects for the pump turbine: 1) the relation between the number Zr of runner blades of the pump turbine and the number Zg of movable guide vanes is optimized so that the number Zg of the movable guide vanes is not an integer multiple of the number Zr of the runner blades, namely, Zg / Zr is not equal to an integer, and the ratio of the number of the movable guide vanes to the number of the runner blades is close to 1.5, 2.5, 3.5 and the like as far as possible; and 2) the ratio D0 / D1 of the distribution diameter Do of the movable guide vanes to the diameter D1 of the high-pressure side of a runner is increased to more than 1.165, namely, the distance between the movable guide vanes and the high-pressure side of the runner is increased. The method is formed on the basis that the principle and the hazard mode of the rotor-stator interaction between the runner blades and the movable guide vanes of the pump turbine are found out, the problem can be solved starting from the design of the pump turbine, and the fundamental problem can be solved.
Description
technical field [0001] The invention relates to a method for alleviating the static interference of a water pump turbine and the vibration of a factory building, and belongs to the technical field of hydraulic machinery and pumped water storage. Background technique [0002] Modern large-scale pumped storage power stations mostly use reversible pump-turbines that pump water and generate electricity at the same time. They operate as water pumps when pumping water and as turbines when generating electricity. The reversible mixed-flow pump-turbine is different from the conventional centrifugal pump in that it is provided with a water guide mechanism, including movable guide vanes and fixed guide vanes. In the operation of the pumped storage power station, it is often encountered that the large value and high frequency caused by dynamic and static interference between the rotating runner blades of the pump turbine and the stationary (non-rotating) guide vanes (including movable ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F03B13/06F03B11/04
CPCF03B11/04F03B13/06Y02E10/20Y02E60/16Y02P90/50
Inventor 徐洪泉桂中华孟晓超樊玉林陆力莫为泽廖翠林李铁友王万鹏张海平孟龙何磊
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES