Heliostat device

A technology of heliostat and plane mirror, applied in the field of solar energy application, can solve the problems of aggravating the inherent system error of the heliostat device, unable to meet high-precision tracking, etc., and achieve the effect of eliminating the inherent system error

Inactive Publication Date: 2009-10-28
张耀明 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, the two axes of the horizontal axis and the vertical axis of the existing heliostat device are often in a non-space orthogonal state, which further exacerbates the inherent systematic error of the heliostat device
[0010] Practice has proved that the existence of this inherent system error makes the heliostat can only track the sun according to the approximate law. No matter how the position of the positioning sensor is matched and what remedial measures are taken, it cannot meet the requirements of high-precision tracking

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] The structure of the heliostat device in this embodiment is shown as figure 1 , 2 As shown, it includes 9 pieces of plane mirrors and their overall frame 1, an elevation angle adjustment mechanism that drives the plane mirror and its overall frame 1 to rotate around the horizontal axis axis AB, and an azimuth adjustment mechanism that drives the plane mirror and its overall frame 1 to rotate around the vertical axis CD, and positioning sensors. The two axes AB and CD of the horizontal axis and the vertical axis are perpendicular to the point O in space, and the geometric center of the nine plane mirror assembly is the center of the middle plane mirror 1', which coincides with the space orthogonal point O. The central axis of the positioning sensor coincides with the line between the intersection point O of the axes of the two cross-axis mechanisms and the central point of the projection target (its specific structure will be described later).

[0025] The azimuth adj...

Embodiment 2

[0038] The basic situation of this embodiment is the same as that of Embodiment 1, the main difference is: (1) as Figure 10 , Figure 11 As shown, the overall frame 1 is limited between the two vertical frames 3, 3' of the azimuth adjustment mechanism, and two coaxial sleeves are respectively fixed on both sides of the overall frame 1, and are respectively supported by the bearing seats 5, 5' on the The upper ends of the stands 3 and 3' on both sides also keep the transverse geometric centerlines of all plane mirror assemblies coincident with the shaft sleeve axis AB, the center of all plane mirror assemblies is the center of the middle plane mirror, and the two intersecting axes perpendicular to the space rotate The intersection point O of the axes coincides. (2) The heliostat device also includes a windproof mechanism attached to the height angle adjustment mechanism of the screw nut, which is mainly composed of a set of electromagnetic clutch mechanism 18, shaft sleeve 19...

Embodiment 3

[0041] The basic situation of this embodiment is the same as that of Embodiment 2, the main difference is: Figure 12 , 13 As shown, the azimuth adjustment mechanism is not in the form of an underframe, but directly adopts a worm gear, and the worm gear shaft 14 is connected to the vertical shaft; a shaft sleeve is fixed in the middle space of the components of the overall frame 1 of the plane mirror, and the shaft sleeve is supported by the bearing seat 15 on the At the upper end of the vertical shaft 14 of the azimuth adjustment mechanism, the transverse geometric centerlines of all plane mirror assemblies coincide with the shaft sleeve axis.

[0042] The height angle adjustment mechanism still adopts the screw nut mechanism, and the centers of all plane mirror assemblies still coincide with the intersection of the two axes. Compared with Embodiments 1 and 2, although there is no plane mirror in the actual sense in the center of all plane mirror assemblies, the distance bet...

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Abstract

The invention relates to the heliostat device, and belongs to the solar utilization technology field. The device comprises the mirror group, the azimuth adjusting device, the leveling angle adjusting device, the locating sensor and the control circuit. The axis of the vertical and the horizontal axis are in the same plane and cross vertically; the geometrical center of the mirror group is at the crossing point of the axis; the central line of the locating sensor superposes the connecting line of the crossing point of the axis and the central point of the casting target. The geometrical center does not move no matter how the other parts move, and the locating center is equipped between the central point and the target point, which removes the errors of the prior art and ensures the precise cast of the sunshine reflected by the mirror.

Description

technical field [0001] The invention relates to a flat mirror device for directional projection of sunlight, that is, a device commonly called a heliostat, and belongs to the technical field of solar energy applications. Background technique [0002] As the name suggests, the heliostat device is used to accurately position sunlight on a certain target, and is usually used as a solar lighting device or a light-gathering component of a thermal power generation system. [0003] With the continuous development of solar energy utilization technology, in order to obtain the ideal lighting effect, it is hoped that the heliostat device has sufficient tracking accuracy during design. However, as far as the applicant knows, the tracking of the existing heliostat devices is approximate, which cannot meet the increasingly stringent requirements for tracking accuracy due to technological progress. [0004] After in-depth and meticulous research, it is found that the design of existing h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24J2/38G05D3/00
CPCY02E10/47
Inventor 张耀明张文进张振远孙利国刘晓晖
Owner 张耀明
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