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1、 Bulb-type power station building three-dimensional static and dynamic analysis (1) Abstract: Domestic water conservancy and hydropower project construction is now in an unprecedented period of vigorous development, many low-head run-of-the gradual construction of hydropower stations built in Chinas
2、 rivers, which bulb type power station due to flow channel flat, too large flow unit, the unit speed , high efficiency, small size, light weight, energy and economic indicators of excellent and good. point become the more common type of a development. However, since the bulb-type hydropower plants u
3、nique layout pattern, resulting in stress distribution is different from the characteristics of conventional hydropower plants, especially in areas of high seismic intensity bulb-type hydropower station was built. Therefore, the projects research and analysis is of great practical significance. Keyw
4、ords: bulb-type hydropower station static and dynamic finite element calculation and analysis 1 Introduction 1.1 Overview of bulb-type hydropower station Water resources are both renewable and do not pollute the environment, high-quality energy. According to the census, Chinas hydropower resources,
5、ranking first in the world, its theoretical potential of 680 million KW, the development of water resources available for up to 378 million KW. According to Chinas current energy mix, in the face of oil, coal, energy supply shortage of the reality of water resources in the composition of Chinas ener
6、gy occupies an increasingly important position. Since the founding of New China, Chinas hydropower construction has made rapid development, especially since the reform and opening up, with the Guangzhou Pumped Storage, Tianshengqiao (dam), small waves at the end of the second beach, the Three Gorges
7、 hydropower station, and a group of world-class construction, China has gradually into the forefront of the worlds hydropower construction. However, due to our unique geographical and climatic conditions, although the total water resources rich, but the distribution is also uneven, water resources a
8、re mainly concentrated in the southwest and northwest regions, while the East China and South Africa and other coastal areas, water resources are relatively scarce, only the National Hydropower 10% of total resources can be developed, the high-head hydropower resources have been left in the current
9、low in order to meet the rapid development of industry and agriculture in this region needs, development and utilization of low-head hydropower resources is imperative. This low-head hydropower station close to the load due to careful, the annual electricity use hours are relatively high and a low d
10、am, a small amount of civil works, construction technology, simple and open construction sites, transportation convenience, so you can speed up the construction speed, short duration, 3 to 4 years can be put into operation the first unit power generation at the same time, low-head power station also
11、 has a flood loss, the full advantages of the use of water resources. However, when compared with the high-head hydropower, low-head hydropower to contribute due to the lower head, but mainly by increasing reference to flow from power. And thus contribute in the same, the turbine size and weight of
12、a corresponding increase in unit price increase, power station construction cost increases. To this end, we must find optimal ways to build hydropower station is a bulb-type shortcut 1,2,3. Bulb-type hydropower station is the use of bulb-type hydro-generating unit to develop low-head hydropower reso
13、urces, the construction of hydropower stations. This hydropower project layout, plant structural design, kinetic energy economic calculations, installed size and model selection calculation as compared with conventional power plants, there are different requirements and characteristics of 3. It is w
14、ith the high-head hydropower station, low-head hydropower compared to axial flow, investment, layout and operation of many power plants have a more obvious the superiority of the 1,2,4. (1) The flow channel pattern is good, small size As the bulb units canceled plane, 180 turning of the scroll and l
15、egislation the surface at 90 tube elbow, while the use of direct-axis water chamber rectangular cross-section of its imports, in the context of the body near the light bulb a gradual transition to ring tail cone section, as well as straight pipes - from a round cross-section changed to a rectangular
16、 cross-section. As the flow channel straight symmetrical, avoiding the formation of flow velocity after the bend in the uneven distribution of flow pattern causes a deterioration of the impact of water loss. This straight tube-type cone expansion of the energy recovery factor of up to 0.9 (and an elbow-shaped tube of conventional energy recovery factor of 0.75 or less). A
