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Archimedes spiral rotating wheel

An Archimedes screw and runner technology, which is applied in the fields of hydropower generation, machinery/engine, mechanical equipment, etc., can solve the problems of unstable operation, large amplitude of water pressure pulsation, unstable hydraulic performance of hydraulic turbines, etc. The effect of smooth, balanced inflow and outflow

Inactive Publication Date: 2005-05-25
王秀华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the late 1990s, the large-scale Francis turbines that had been put into operation in China had problems of unstable operation to varying degrees. The root cause was that the hydraulic performance of the turbines was unstable.
The model test of the hydraulic turbine of the Three Gorges Hydropower Station also shows that in the area of ​​high water head and small flow, the amplitude of water pressure fluctuation in the channel is large, and it is expected that the prototype will not be able to operate stably within the normal operating range

Method used

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  • Archimedes spiral rotating wheel
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Embodiment Construction

[0060] see figure 1 , The Archimedes spiral runner includes a fixed bell mouth seat ring 1, a runner 2 that rotates on the shaft, and an appropriate gap is maintained between the bell mouth seat ring 1 and the runner 2. There is a water inlet 3 along the axial direction on the runner, and water outlets 4 and 5 are symmetrically distributed along the radial direction.

[0061] figure 2 for figure 1 A-A sectional view of A-A, from the sectional view, there are 16 Archimedes spiral blades, the long and short blades are evenly distributed in half, 6 represents short blades, and 7 represents long blades. The Archimedes flow channel 8 is formed between the long and short blades, and there must be one and only one projection on the cross section along the flow channel as the Archimedes spiral, which can be the inner line of the blade or the blade The intersection line between the inner side or the outer side and the bottom surface of the runner is the projection formed by the A...

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Abstract

The present invention is one kind of Archimedes spiral rotating wheel capable of being used in hydraulic power generation and other fields. It includes water inlet, water outlet and blades inside therotating wheel, and features Archimedes spiral flow channel between adjacent blades and one string in the flow channel and with Archimedes spiral projection in the cross section plane of the rotatingwheel. The present invention may be used in hydraulic power generation, ships, etc. to convert the energy of flowing water into rotating mechanical energy for power generation.

Description

Technical field: [0001] The invention relates to energy conversion equipment used in fields such as hydroelectric power generation, and in particular to an Archimedes screw runner of a water turbine. Background technique: [0002] There are two types of turbines: impact turbines and impact turbines. The impact turbine is a bucket or vane of the water turbine that is impacted by high-speed water flow to convert the kinetic energy of the water flow into rotational mechanical energy. The impact turbine is the pressure energy and kinetic energy of the water flow that are converted into mechanical energy in the flow channel of the runner. Francis turbine is a kind of impact water turbine, and most large and medium-sized hydropower stations use Francis turbine. [0003] A runner using "X-shaped blades" (Fig. 9) is shown in (Fig. 10). ( Figure 8 ) is the working diagram of the Francis turbine. The water flows through the volute, enters the runner radially through the water guide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B3/12
CPCY02E10/20
Inventor 王秀华
Owner 王秀华