Micro arc surface reflector punching backplane

Abstract

The invention discloses a micro arc surface reflector punching backplane, which belongs to the field of solar concentrator reflector back support. The micro arc surface reflector punching backplane comprises an annular shaping part, two arc forming parts, upper and lower two symmetrical arc connection arms, and reinforced supporting arms, wherein the annular shaping part is around one circle of the reflector edge; the two arc forming parts are distributed at the left side and the right side inside the annular shaping part, are symmetrical bilaterally and protrude inwardly in an arc mode; the upper and lower two symmetrical arc connection arms are connected with the central area of the two arc forming parts; the reinforced supporting arms are connected with at least four points distributed uniformly on the circumference of the annular shaping part, and after the reinforced supporting arms are intersected or crossed with the arc forming parts, a diamond or a regular polygon is formed; and the annular shaping part forms a planar structure in a surrounding mode, and the arc forming parts, the connection arms and the reinforced supporting arms form micro arc surfaces sunk towards to the central area relative to the plane. The surface figure precision of a heliostat reflecting surface and the reflecting spot quality are improved, the reflector supporting structure making efficiency and the part size consistency are improved, and the making cost of the heliostat structure is reduced.

Description

technical field [0001] The invention belongs to the field of solar energy utilization, and more specifically relates to a tower-type solar thermal power generation system, which can be used as a back plate of a reflector of a heliostat or a back support of a reflector of a concentrator with a similar principle. Background technique [0002] Tower solar thermal power generation is one of the main forms of solar thermal power generation. The basic principle is: use the mirror field composed of many heliostats to gather sunlight to the heat collector at a fixed position through one or more reflections, heat the working medium in the heat collector, and then the working medium is transported, stored Heat, heat exchange with water and other links, generate superheated steam to drive the turbine generator to generate electricity. [0003] The function of the mirror field in the tower-type photothermal power station is to gather light and heat. It is composed of several heliostats...

AI Technical Summary

Problems solved by technology

[0005] In the existing mirror (sub-mirror or facet) support method, the bracket welded by metal profiles is heavy, the overall strength of the structure is not high, and the shape accuracy and consistency of the joint surface with the mirror are difficult to guarantee; The small surface of the heliostat using the known stamped metal structure improves the defects of the welding structure of metal profiles in terms of forming accuracy and manufacturing efficiency, but it belongs to the standard flat joint surface, which has a great impact on the optical properties of the sub-mirror and the entire heliostat. No improvement in reflection performance

[0006] In the prior art, there are usually two ways to connect and fix the reflective surface of the heliostat and the support: one is to directly fix the reflector on the support of the heliostat, which is realized by setting support points at the corresponding positions of the support. The size of the mirror truss structure is large, and the positioning references of each support point cannot be completely consistent during processing. As a result, for the same mirror, several fulcrums on it cannot form an ideal surface shape, and are also affected by the truss structure. impact, the distribution of support points cannot be ideal, so this method is not conducive to the strength and accuracy of the reflective surface; another common structure is to add a first-level metal frame between the heliostat bracket and the reflective surface. The form of the frame is composed of hashed or welded frame metal profiles. Among them, the hashed support has no advantage in stabilizing the surface shape of the reflector, and the on-site installation accuracy is high; and the welded frame structure is relatively difficult due to its processing method. The large amount of deformation makes it difficult to achieve higher mirror surface accuracy and design the ideal surface structure, and this structure also brings relatively large amount of materials, heavy structure, and low production efficiency of the frame itself. Conducive to large-scale assembly line production and other disadvantages

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