CN1046803C

CN1046803C - Sun tracing mirror

Info

Publication number: CN1046803C
Application number: CN93106881A
Authority: CN
Inventors: 吴活玲; 卢志强
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-08
Filing date: 1993-06-08
Publication date: 1999-11-24
Anticipated expiration: 2013-06-08
Also published as: CN1096362A

Abstract

The present invention relates to a direction changeable plane mirror which is provided with a device which traces the sun direction. The device is especially a sun direction tracker which uses a direction rod extending from a fixed center as output. The direction changeable plane mirror is connected with a supporter by a central type universal coupling, and a mirror body is provided with a control rod extending outside a mirror plane. The control rod is swung, which can change the direction of the direction changeable plane mirror. The present invention is characterized in that the control rod is a straight-line device of which the length is changeable; the telescopic direction of the length of the control rod is perpendicular to a mirror surface; a central type universal coupling is arranged at the tail end of the control rod and is connected with the tail end of the direction rod; a connecting line of the center of the central type universal coupling of the control rod and the center of the central type universal coupling of the direction changeable plane mirror is perpendicular to the mirror plane; the distances from the fixed center of the direction rod to the centers of the two central type universal couplings are equal.

Description

Heliostat

The present invention is a kind of heliostat, and is specifically a kind of solar energy fixed to tracking means.

Heliostat is the solar concentrator of high tower solar power plant.A common power station has more than thousand heliostat to be distributed in around the high tower, and sunshine is reflexed to heat collector on the high tower, and these heliostats can rotate around trunnion axis and vertical axis and change direction and adapt to the sun not stopping on high and move.The sun is close to constant speed very regularly and moves, but the rotation of heliostat diaxon is not a constant speed, and the variation of the direction of each heliostat is different, and the method that prior art solves these compound actions is to use complicated computer control, drives thousands of non-constant motions.

The heliostat that the purpose of this invention is to provide available simple drive unit, thus solar utilization technique simplified.

The present invention realizes in the following way:

The present invention is a kind of level crossing of direction-agile, it has the steering yoke that stretches out with fixed center is the solar direction tracking means of output, level crossing connects support and has control lever to reach outside the mirror plane at shank by the center type joint coupling, the swing control lever can change the direction of level crossing, feature is that control lever is a variable-length Straight line unit, the vertical minute surface of telescopic direction, the end of control lever has center type joint coupling closure bar end, the line perpendicular mirrors plane at the joint coupling center of control lever and the joint coupling center of level crossing, the steering yoke fixed center equates to the distance at two joint coupling centers.

Heliostat of the present invention can make device very simple as water-head copper clepsydra float-type constant-speed drive devices such as employings, and universal easily, desirable solar energy is intimate free, and the present invention steps to this target to go a step further.

Fig. 1 is a schematic diagram.

Fig. 2 is the heliostat side view of the positive period of the day from 11 a.m. to 1 p.m in the Spring Equinox on the Northern Hemisphere, and the target high tower is at the Due South of heliostat

Water-head copper clepsydra float-type constant speed drive units such as Fig. 3 is.

With reference to Fig. 1, O is the center of level crossing joint coupling. B is the variable-length Straight line unit Terminal joint coupling center. A is the fixed center of steering yoke. If the O point is at level crossing Reflecting surface on, OM is minute surface. IO is the sun incident ray on the O point, because AB The tracking of steering yoke, the parallel AB of IO and and triangle ABO isoplanar. Angle ABO equals Angle IOB. At triangle ABO, AB equals AO, so angle AOB equals angle ABO etc. In angle IOB. Because OB is the normal of vertical OM, this is that the plane mirror incidence angle equals The relation of angle of reflection necessarily means fixed-direction to OA so flash back the sunlight.

Be extended line JO direction incident from IO such as sunlight, then the extended line NO of OB is Normal is the extended line of AO such as OR, the parallel AB of JO then, and JON equals angle ABO Equal angle RON, consist of the relation that the level crossing incidence angle equals angle of reflection, make the finger that flashes back the sunlight Fixed-direction to the extended line OR of AO.

The joint coupling of level crossing is as using fork-shaped both sides supporting twin axle structure, diaxon intersection point It is the center of joint coupling. This center can be arranged on the reflecting surface, also can open with central authorities The mode of hole supporting reaches same purpose. The not perforate of center of ball formula face mirror such as joint coupling, Then the centre of sphere at joint coupling center can not be on the mirror reflecting surface, and this moment, minute surface was desirable mirror MO Parallel surface slightly still plays heliostat, and just centrepin has skew, with 6M * 6M's Heliostat is example with the ball formula connector of 0.4M diameter, and off-centring is 0.2M, to the property of heliostat Can impact little, as at the mirror center drilling, then can arrange the centre of sphere and mirror isoplanar, twin axle universal Connector and ball formula joint coupling all are the popular form that heliostat uses in the prior art, The present invention is suitable for.

Embodiment with reference to accompanying drawing explains the present invention:

Fig. 2 is the heliostat side view of the positive period of the day from 11 a.m. to 1 p.m in the Spring Equinox on the Northern Hemisphere, the target high tower is at the Due South of heliostat, 1 is the mirror base among the figure, the 2nd, the mirror pillar, the 3rd, mirror ball formula joint coupling, the 4th, level crossing, the 5th, the control lever that stretches out from mirror, the 6th, the urceolus of the telescope cartridge type variable-length linear telescopic device on the control lever, the 7th, the inner core of telescope cartridge type expansion bend, 8 is ball formula joint couplings of 7 ends, the north and south rotating shaft 11,12 that the moved end of closure bar 9, the fixed end of steering yoke have half movable latch 10 to connect equator ceremony device is axle sleeves of 11,13 is pillars of 12, and 14 is bases of 13.10 axis and 11 axis meet at a bit, and this is the fixed center of steering yoke, the axis of the line vertical 10 at this center and other end joint coupling center.The declination that manually adjust steering yoke by the solar declination of astronomical ephemeris every day once.

Water-head copper clepsydra float-type constant speed drive units such as Fig. 3 is.Rotating shaft 11 is driven by the wiring 15 of this constant speed drive unit, 15 1 ends have weight 16, the other end has the float 17 of copper clepsydra formula hydrodynamic(al) device, float is subjected in the water tank 18 free scale, supply water by fistulae 19 and constant voltage case 20 constant speed, the 21st, water tank, the 22nd, overflow disk, the 23rd, the gap of constant voltage case.

, constantly be subjected to the water of water tank 18 transfer to relevant time scale add water go into constant voltage case 20 to spill-over by clock every morning, adds water and go into water tank to full.The design of copper clepsydra formula, the flow of flow-rate ratio fistulae water outlet that injects the constant voltage case from water tank is big, makes constant voltage case Chang Manyi, spills into spilling water basin 22 from gap 23, produces the constant voltage water-head, outputs to from the fistulae constant current and is subjected to water tank, and the float constant speed is raise.

Popular solar tracking form in the prior art: clockwork, servo control mechanism and manually method all be applicable to the present invention.Clockwork cam-type device is a kind of constant-speed drive equator ceremony double-axis tracking sun device, also having sun right ascension to drive with the constant speed single shaft follows the tracks of, the solar declination manual mode of adjusting once every day is fit to drive many trackers with a constant-speed drive device by the rope band transmission.

Claims

1. heliostat, it has the level crossing of direction-agile, it is the sun tracker of output that the steering yoke that stretches out with fixed center is arranged, level crossing connects support and has control lever to reach outside the mirror plane at shank by the center type joint coupling, the swing control lever can change the direction of level crossing, feature is that control lever is a variable-length Straight line unit, the vertical minute surface of telescopic direction, the end of control lever has center type joint coupling closure bar end, the line perpendicular mirrors plane at the joint coupling center of control lever and the joint coupling center of level crossing, the steering yoke fixed center equates to the distance at two joint coupling centers.

2. according to the heliostat of claim 1, it is characterized in that the control lever (5) that stretches out from mirror is arranged, urceolus (6) and inner core (7) that telescope tube formula variable-length linear telescopic device is arranged on the control lever, inner core (7) end has ball formula joint coupling (8), the moved end of connector (8) closure bar (9), the fixed end of steering yoke has half movable latch (10) to connect the north and south rotating shaft (11) of equator ceremony device, north and south rotating shaft (11) has axle sleeve (12), axle sleeve (12) has pillar (13), pillar (13) has base (14), the axis of the axis of half movable latch (10) and north and south rotating shaft (11) meets at a bit, the axis of vertical half movable latch of ball center's line (10) of this point and connector (8).

3. according to the heliostat of claim 1, it is characterized in that steering yoke be by etc. water-head copper clepsydra float-type constant speed drive unit drive.