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A Pelton Turbine Based on Pear-shaped Airfoil Blades

A technology of airfoil blades and water turbines, applied in impact engines, mechanical equipment, hydroelectric power generation, etc., can solve the problems of unusable water energy resources, poor economy, and no water diversion channels, etc., to solve the problem of difficult migration of fish and reduce Production cost, the effect of increasing output

Active Publication Date: 2019-10-01
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the way to develop water energy is generally to build hydropower stations, using high-efficiency water turbines to convert water energy, but it has certain requirements for site selection, for example, some scattered water resources with low head cannot be used
If a dam is built on a stream with a low water head to increase the water head, due to the disadvantages of environmental damage, high investment cost, and long construction period, the construction of the dam will result in low water energy conversion efficiency, low output power, and poor economy.
[0005] Chinese patent application CN201110155603 discloses a "water conservancy channel and river channel combined waterwheel power generation device". Although this scheme proposes a new type of waterwheel, which is used for low water head power generation, there is no water diversion channel, and at the same time, the efficiency of the blades is low. Poor use value
Chinese patent application 201620875878 discloses a "waterwheel power generation device". This scheme applies waterwheels to power generation, but the blades do not still use the traditional method, and the economic value is low and has no use value.

Method used

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  • A Pelton Turbine Based on Pear-shaped Airfoil Blades
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  • A Pelton Turbine Based on Pear-shaped Airfoil Blades

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Experimental program
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Effect test

Embodiment 1

[0027] combine Figure 1 to Figure 5 , an impact turbine based on pear-shaped airfoil blades proposed by the present invention, which includes an impeller, a rotating shaft 3, a water diversion channel 5, and a bearing support frame 6, wherein: the impeller includes a plurality of pear-shaped airfoils The blade 4, the impeller is fixed above the diversion channel, the impeller is fixed at the tail of the transition section 7 of the diversion channel, and the water flow is introduced into the diversion channel through the inlet 1 of the diversion channel through the inlet section 5 of the diversion channel. The transition section 7 of the water channel drives the impeller to rotate, and then flows to the water outlet 2 of the water channel through the outlet section 8 of the water channel; On the board, the pear-shaped airfoil blades 4 are circumferentially distributed in space, and the blade fixing plate is fixed on the bearing support frame 6 by welding; the inlet section 5 o...

Embodiment 2

[0033] combine figure 1 , figure 2 and Figure 4 , the impeller includes three pear-shaped airfoil blades 4, the coordinates of the key points of the pear-shaped curve in the impeller on the axial section airfoil curve are expressed in the following manner, and Z represents the pear-shaped airfoil The spatial abscissa value of the key point on the blade 4-section airfoil curve, W represents the space ordinate value of the key point on the pear-shaped airfoil blade 4-section airfoil curve, the parameters are shown in Table 2,

[0034] Table 2:

[0035] serial number Z W serial number Z W 1 -6.3651 -8.6932 11 -5.2918 -7.4914 2 -5.3666 -12.4651 12 -4.9568 -8.2264 3 -6.9776 -9.2302 13 -4.4743 -8.8824 4 -8.0461 -10.4499 14 -3.9786 -9.5288 5 -6.1767 -12.3873 15 -3.5105 -10.1953 6 -5.7661 -8.1415 16 -3.1525 -10.9245 7 -7.5615 -9.7976 17 -3.1531 -11.7202 8 -8.2029 -11.2309 18 -3.7656 -12.2275 ...

Embodiment 3

[0038] combine Figure 1 to Figure 3 , The number of impellers arranged on the bearing support frame 6 of the present invention is 10-12.

[0039] The length L of the inlet section 5 of the diversion channel 0 The length L of the transition section 7 with the diversion channel 1 The ratio of 0.37 to 0.44; the length L of the outlet section 8 of the diversion channel 2 The length L of the transition section 7 with the diversion channel 1 The ratio is 1.62 to 1.69.

[0040] The diameter of the impeller D 1 and the diameter D of the rotating shaft 3 0 The ratio of 1.95 to 2.02; the diameter D of the bearing support frame 6 2 and the diameter D of the rotating shaft 3 0 The ratio is 9.39 to 9.46.

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PUM

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Abstract

The invention relates to a pear-shaped linear wing type blade based impact water turbine. The pear-shaped linear wing type blade based impact water turbine comprises an impeller, a rotary shaft, a water division runner and a bearing supporting frame. The pear-shaped linear wing type blade based impact water turbine is characterized in that the impeller comprises a plurality of pear-shaped linear wing type blades, wherein the impeller is fixedly arranged on a 1 / 3 portion, up along the centre line, of an inlet section of the water division runner; the impeller is fixedly arranged on the tail part of a transition section of the water division runner; water passes through the inlet section of the water division runner from a water inlet of the water division runner, and is introduced into thetransition section of the water division runner, drives the impeller to rotate, and flows to a water outlet of the water division runner through an outlet section of the water division runner; pear-shaped linear wing type blades are arranged on a blade fixing plate by taking the rotary shaft as the center, and are distributed in a peripheral mode in space; and the blade fixing plate is fixedly arranged on the bearing supporting frame in a welding mode. The pear-shaped linear wing type blade based impact water turbine is simple in structure, is high in efficiency, can be used for a water turbine used for ocean tidal energy power generation, and also can be used for power generation under tiny tidal energy conditions such as a mountainous area, a plain, a mountain spring and small reservoirstream.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and hydropower engineering equipment, in particular to an impact water turbine based on pear-shaped airfoil blades. [0002] technical background [0003] At present, the development of clean and renewable energy is an inevitable trend of human development needs. Hydropower is a green and renewable resource, and its development and utilization are of great significance. However, with the large-scale development of my country's hydropower resources, there are fewer and fewer medium- and high-head stations with better economic indicators, and the development and utilization of low-head micro-power stations has become a research hotspot. Pelton turbine, as a modern hydraulic machine, has the advantages of high efficiency and high income. It is mainly used in high head power stations and is an economical and suitable water energy conversion equipment in the development of high head water energ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B1/02F03B1/00F03B13/00
CPCF03B1/00F03B1/02F03B13/00Y02E10/20
Inventor 郑源张玉全李东阔臧伟杨春霞
Owner HOHAI UNIV