CN204374776U - Heliostat and elevation drive thereof - Google Patents

Abstract

The utility model provides a kind of elevation drive of the heliostat for central tower-type electricity generation station.Described elevation drive is configured for by making two the hinged parts that rotate each other of described heliostat rotate the elevation angle controlling the reflecting surface of described heliostat, described elevation drive comprises piston, described piston has the piston rod be longitudinally hinged in piston, one in described parts is connected to described piston rod rigidly, and another in described parts is connected to described piston rigidly.Described elevation drive comprises ice scraper, and described ice scraper is formed at when vertically moving in described piston and is removed from described piston rod by chilled water.

Description

Heliostat and elevation drive thereof

Technical field

The utility model relates to solar electrical energy generation tower, and in particular to the heliostat designing for described solar electrical energy generation tower, and be specifically related to its parts.

Background technology

Energy supplier is being devoted to seek substituting primary energy always.Such energy is a sun power, and a kind of mode of sun power that utilizes is for adopting central tower-type electricity generation station.

A kind of typical solar electrical energy generation tower apparatus comprises the array of heliostat and collects tower.Each heliostat is all configured to follow the tracks of the sun and is reflected to the receiver collecting tower by daylight, thus heats this receiver and content thereof.The heat-transfer fluid (it can be the fluid of such as water, fused salt or motlten metal) forming heat transport medium is contained in above-mentioned receiver.

The heat-transfer fluid of heating is delivered to power house (such as steam power station), wherein the heat energy of heat-transfer fluid is for driving one or more turbine, so that in a conventional manner, such as by the wheel shaft of each turbine is connected to generator to generate electricity.

Utility model content

According to the one side of theme disclosed in the utility model, provide a kind of elevation drive of the heliostat for central tower-type electricity generation station, described elevation drive is configured for by making two the hinged parts that rotate each other of heliostat rotate the elevation angle controlling the reflecting surface of heliostat, elevation drive comprises piston, piston has the piston rod be longitudinally hinged in piston, one in described parts is connected to piston rod rigidly, and another in described parts is connected to piston rigidly, wherein said elevation drive comprises ice scraper, described ice scraper is formed at when vertically moving in piston and is removed from piston rod by chilled water.

Piston can comprise piston rod and move the opening passed through, and wherein ice scraper is arranged on opening part.

Ice scraper can be annular.

Ice scraper can comprise to inner blade.

Blade can be made up of the material being selected from the group comprising plastics and metal.

Described piston can be electric piston, wherein uses electric energy to be hinged in piston by piston rod.

Described piston can comprise threaded shaft, and piston rod is connected to nut component, and described nut component is configured to and the coordinating at least partially of threaded shank, and what make the rotation of threaded shaft cause nut component in piston vertically moves.

Described elevation drive also can comprise control device, and described control device comprises stepper motor, and described control device is configured to utilize electric energy to rotate to make described threaded shaft.

Described elevation drive also can comprise gearing, and described gearing comprises planetary gear system, and described gearing is driven by described motor and is constructed such that described threaded shaft rotates.

According to the another aspect of theme disclosed in the utility model, provide a kind of heliostat comprising elevation drive as above.

Accompanying drawing explanation

In order to understand theme disclosed in the utility model and how implement to understand the utility model in practice, show with reference to the accompanying drawings and only with unrestriced way of example, embodiment be described, wherein:

Fig. 1 is the schematic diagram at central tower-type electricity generation station;

Fig. 2 is the skeleton view of the heliostat at the central tower-type electricity generation station shown in Fig. 1;

Fig. 3 A is the skeleton view of the elevation drive of the heliostat shown in Fig. 2;

Fig. 3 B is the skeleton view of the elevation drive shown in Fig. 3 A, wherein removes main shell;

Fig. 4 A is the skeleton view of the control device of the elevation drive shown in Fig. 3 A;

Fig. 4 B is the viewgraph of cross-section intercepted along the line IV-IV in Fig. 4 A;

Fig. 5 A is the skeleton view of the planetary gear system of the control device shown in Fig. 4 A and 4B;

Fig. 5 B is the viewgraph of cross-section intercepted along the line V-V in Fig. 5 A;

Fig. 5 C is the exploded view of the planetary gear system shown in Fig. 5 A;

Fig. 6 is the skeleton view of the secondary annulus body of the planetary gear system shown in Fig. 5 A;

Fig. 7 A is the skeleton view of the electric piston of the elevation drive shown in Fig. 3 A;

Fig. 7 B is the viewgraph of cross-section intercepted along the line VII-VII in Fig. 7 A;

Fig. 8 A is the skeleton view of the nut component of the electric piston shown in Fig. 7 A and 7B;

Fig. 8 B is the skeleton view of the nut of the nut component shown in Fig. 8 A;

Fig. 8 C is the skeleton view of the sliding members of the nut component shown in Fig. 8 A;

Fig. 9 is the close-up perspective view of the bottom of the elevation drive shown in Fig. 3 A;

Figure 10 is the skeleton view of the end cap of the elevation drive shown in Fig. 3 A;

Figure 11 is the skeleton view of the bottom of the threaded shank of the electric piston shown in Fig. 7 A and 7B;

The bottom that Figure 12 is the elevation drive shown in Fig. 3 A look up close-up perspective view; And

Figure 13 is the skeleton view of the elevation drive shown in Fig. 3 A, and it is depicted as the torque tube being installed to the interface arrangement shown in Fig. 2 and heliostat.

Embodiment

As shown in Figure 1, the solar electrical energy generation tower substantially represented with 10 is provided.Solar electrical energy generation tower 10 comprises the array of heliostat 12, and it is configured to reflect incident solar radiation to collecting tower 14.Collect tower 14 containing to be heated by the solar radiation of reflecting and thus for providing the fluid (not shown) of electric power to power house.Power house can be such as steam-electric power, and in this case, the fluid of heating is superheated vapor, steam subsequently by turbine expansion, with from wherein obtaining the useful energy and generating electricity.

As shown in Figure 2, each heliostat 12 includes the base device 16 being configured to heliostat is supported on the fixed position in ground and the heliostat assembly 18 supported by base device.

Base unit 16 comprises the interface arrangement 22 by the pylon 20 that is fixed in ground and the especially position of supporting reflex mirror assembly 18.Base device also comprises position angle driver 24 and elevation drive 26, and it controls position angle and the elevation angle of the reflecting surface of mirror assembly 18 respectively.

Mirror assembly 18 comprises the torque tube 28 supporting multiple sway brace 30.Sway brace 30 supports one or more catoptron 32, and these catoptrons form the reflecting surface of heliostat 12.In addition, power control module (PCM) assembly 34 that can be mounted to mirror assembly 18 is provided.

As shown in Figure 3 A and Figure 3 B, elevation drive 26 comprises control device 320, main shell 322, electric piston 324 and cable 326.Control device 320 is configured to the operation instructing elevation drive 26, and utilizes electric energy to provide mechanical energy to electric piston 324.Electric piston 324 is configured to utilize mechanical energy extend relative to main shell 322 and/or bounce back, thus causes torque tube 28 around the relative rotation of interface arrangement 22, and makes the reflecting surface pivotable of heliostat 12 to regulate its elevation angle, below will lay down a definition to this.Cable 326 is configured to promote the communication with control device 320, and provides electric power to it.

As shown in Figure 4 A and 4 B shown in FIG., control device 320 is included in the electric machine 328 in electric machine shell 330, and the gearing 332 in drive housing 334.

Electric machine 328 is configured to provide the mechanical energy required for electric piston 324.Itself thus can comprise as Fig. 4 B best shown in motor 336 and controller (not shown).

Motor 336 can be for electric energy conversion is become mechanical energy, and what such as rotate energy is applicable to equipment arbitrarily.It can comprise the stepper motor controlled by controller.It can comprise installing plate 340 further, have the stator module 342 of stepping motor rotor (not shown) and output shaft 344.In addition, usually provide cable (not shown) to promote with the communication of controller and to provide electric power to motor 336.

The advantage as the stepper motor of motor 336 is used to be that it can be used for little increment, torque tube 28 being rotated.Another advantage is that its moment of torsion increases with the reduction of its speed.Thus because its speed is very low during use, it can provide relatively high power, such as, offset as the external force acted on reflecting surface from wind etc.

Although this description discloses the motor providing and rotate energy, will understand, motor can provide another kind of mechanical energy (such as, it can comprise linear actuator); Those skilled in the art will recognize that, applicable transmission and/or gear drive element should be provided to become to make torque tube 28 rotate necessary motion by the conversion of motion provided by motor.

There is provided gearing 332 so that the mechanical energy from motor 336 is transferred to electric piston 324.Like this, it can reduce the speed of the mechanical energy provided, and increases its moment of torsion (or vice versa).As Fig. 4 B institute the best illustrates, drive housing 334 is rigidly attached to motor 336 on its top, and is attached to main shell 322 in its bottom.It comprises compound planetary gear train system 348 further.

As shown in Figure 5 A to FIG. 5 C, planetary gear system 348 comprises central gear 350, to rotate with it on the output shaft 344 that central gear 350 is arranged on motor 336.Central gear 350 engages with three planet wheels 352, and described three gears engage with the first and second annular wheels 354,356 again.

Each planet wheel 352 can comprise two respective gear wheels be rotatably installed on coaxial 360, described coaxial across being arranged on two brackets 362 between two brackets 362.Planetary gear system 348 is designed such that the respective gear wheels on each axle 360 rotates jointly.(such as, make in respective gear wheels one to engage with both the first and second annular wheels 354,356 to realize this jointly to rotate by configuration respective gear wheels.)

First annular wheel 354 and secondary annulus 356 are respectively formed on the inside surface of the first internal tooth wheel body 364 and secondary annulus body 366.Annular wheel 354,356 has the different number of teeth.Such as, the first annular wheel 354 has 40 teeth can have 40 teeth, and secondary annulus 356 has 37 teeth.

As Fig. 5 A institute the best illustrates, first internal tooth wheel body 354 comprises spline 368, spline 368 engages with the corresponding recesses (not shown) be formed on drive housing 346 inside surface, thus guarantees that the first internal tooth wheel body 354 is with drive housing 346 movement jointly.When drive housing 346 is rigidly connected to each other with the main shell 322 of elevation drive 26, the first internal tooth wheel body 364 does not move relative to the main shell of elevation drive.

As shown in Figure 6, secondary annulus body 366 comprises the central through-hole 370 formed together with spline 372.In addition, described annular wheel body forms at least one side opening 374, and at least one is formed together with groove 376.The object of this structure will be explained below.

In the operation of planetary gear system 348, motor 336 operates its output shaft 344 is rotated, thus central gear 350 is rotated.The rotary actuation planet wheel 352 of central gear 350, respective axle 360 is made to bear the rotation (because the motion that the motion of the first internal tooth wheel body 364 is rigidly attached to the drive housing 346 of motor 336 retrained, so the first annular wheel 354 non rotating) of output shaft 344.Because the number of teeth of the first annular wheel 354 is different from the number of teeth of secondary annulus 356, the gear ratio between planet wheel 352 from each annular wheel is different.As a result, the rotation of the planet wheel 352 engaged with two annular wheels 354,356 causes the relative rotation between two annular wheels.Because the first annular wheel 354 is fixing relative to drive housing 346, thus main shell 322, secondary annulus 356 and thus secondary annulus body 366 rotate relative to the main shell of elevation drive 26.

As shown in figures 7 a and 7b, electric piston 324 comprises piston rod 378, and piston rod 378 is formed as threaded shaft 380 (it can be ball screw) and is accommodated in hollow tubular wherein, makes both be suitable for relative to each other vertically moving.The main shell 322 of elevation drive 26 forms the piston of electric piston 324.In addition, electric piston comprises bracing strut 349, and nut component 351.

Threaded shaft 380 be threaded at least partially; Or it can be threaded along its whole length.Threaded shaft is configured to rotate together with secondary annulus body 366, thus rotates relative to main shell 322.The top 382 of threaded shaft 380 is threaded, and (not shown in Fig. 7 A and Fig. 7 B with the restriction bolt 384 of planetary gear system 348; In figure 5b can the best find out) coordinate.Get back to Fig. 5 B and Fig. 5 C, the threaded shaft 380 under restriction bolt 384 provides pad 386.Pad 384 comprises and upwarps end 388, upwarp end 388 against and flush with one of side of restriction bolt 386, so that restriction movement relative to each other separately.In addition, pad 386 comprises downward protrusion 390, and downward protrusion 390 can be the groove 376 be formed in the addressing hole 374 of secondary annulus body 366, so that the respective movement relative to each other of restriction.Groove 392 is formed in threaded shaft 380 in the side on its top 382.Threaded shaft 380 is inserted through the central through-hole 370 of secondary annulus body 366, and the spline 372 of internal tooth wheel body is accommodated in groove 392, thus guarantees that threaded shaft and secondary annulus body rotate jointly.According to above configuration, the rotation (being caused by the rotation of the output shaft 344 of motor 336) of secondary annulus body 366 causes threaded shaft 380 to rotate, and restriction bolt 342 can not be caused to rotate relative to it and therefore depart from from it.

Threaded shaft 380 provides stability to provide bracing strut 349 to think, below will lay down a definition to this.Described bracing strut comprises axle bush 394 and several bearing 396.Bearing 396 rigidity is arranged in the shell 334 of gearing 332.Bracing strut 349 comprises the through hole 398 through axle bush 394 and bearing 396.This configuration promotes the storage of the bracing strut 349 of threaded shaft 380.

As shown in Fig. 8 A to Fig. 8 C, nut component 351 comprises the nut 400 that can be bulb nut, and sliding members 402.

As Fig. 8 B institute the best illustrates, nut 400 comprises top 404, bottom 406 and through hole 408.Top 404 is with non-circular formation.Such as, it can comprise flattened side alternately and circle side 410,412.Bottom 406 comprises spline 414.Through hole 408 is configured to coordinate with the threaded section of threaded shaft 380.

As shown best in fig. 8 c, sliding members 402 comprises through hole 416, and the shape of through hole 416 corresponds to the top 404 of nut 400, such as, have flattened side alternately and circle side 418,420.In addition, it comprises two pairs of ridges 422, often pair of groove 424 produced in therebetween.Groove 424 is corresponding to the ridge (not shown) of main shell 322 inside being formed in elevation drive 26.When nut component 351 is arranged in main shell 322, when ridge is accommodated in wherein by groove 424, thus limit the rotation of nut component in main shell, and allow its vertically moving in main shell.

As mentioned above, piston rod 378 exists with the form of hollow tubular.Get back to Fig. 7 A, its top 428 is formed to be assemblied on the bottom 406 of nut 400.It is formed with oncus 432 to guarantee to vertically move with it.In addition, it makes the spline 414 of itself and bottom 406 paste suitable assembling, to rotate with it in the generation type of inside.Piston rod 378 has the end cap 434 at its bottom 436 place further, as shown in Figure 9.

As shown in Figure 10, end cap 434 comprises the upper end 437 and bottom 440 with spline 438, and bottom is formed as cylinder and comprises the through hole 442 run through wherein.In addition, the generation type of the bottom 436 of piston rod 378 is similar to its top 428 described in above reference diagram 7A, specifically, on the upper end 436 that its generation type makes it be assemblied in end cap 434.

Threaded shaft 380 through bracing strut 349 and nut component 351, and extends almost through the whole length of piston rod 378.For preventing its moving radially in threaded shank 380, be provided in the ring 444 of threaded shaft 380 bottom end, as shown in figure 11.The external diameter of described ring approximates the internal diameter of piston rod 378, and is assemblied in threaded shaft so that the rotation promoting it in piston rod.

Get back to Fig. 9, the bottom of main shell 322 comprises side direction ridge 446.Ridge 446 can be formed with housing integration, or as shown in the figure, as the parts being firmly installed to the separate elements of main shell 322 represented with 448.Ridge comprises the through hole 450 run through wherein.

As shown in figure 12, may be provided in the annular ice scraper 452 of the bottom end of main shell 322, itself or be connected to element 448, as shown in the figure, or do not provide when separate elements in the bottom end of main shell and be connected to shell itself.Be formed in inner blade 454 on the inner edge of ice scraper 452.Blade 454 is configured to that piston rod 378 is pasted and is received in wherein suitablely, allows piston rod 378 to slide simultaneously and runs through wherein.Specifically, blade is configured to be removed from piston rod 378 by the chilled water of frost, ice, snow and/or other similar type before piston rod 378 retracts in main shell 322.

Blade 454 can be made up of any suitable material of such as metal or plastics.It can comprise single planar edge, maybe can be conducive to disconnecting two of chilled water or ridge more than two.

As shown in figure 13, elevation drive 26 is installed to interface arrangement 22 via end cap 434, and namely the mounting rod of interface arrangement is rotatably accommodated in the through hole 442 of end cap.In addition, it is installed to torque tube 28 via ridge 446, and the installation elements being namely attached to torque tube is rotatably accommodated in the through hole 450 of ridge.Therefore end cap 434 and ridge 446 constitute the installation elements of elevation drive 26.

In use, controller sends signal to motor 336 and rotates to make its output shaft 344.As mentioned above, this causes the rotation of threaded shaft 380.Due to threaded shaft 380 being spirally connected in nut component 351, the rotation of threaded shaft causes nut component longitudinal sliding motion in main shell 322, thus cause piston rod 378 relative to the extension of main shell or retraction, and consequently leads to the end cap 434 that is attached to piston rod relative to the extension of main shell or retraction.This of end cap 434 moves the through hole 442 and the change of the spacing of the through hole 450 of ridge 446 that cause end cap 434.Because torque tube 28 is connected to interface arrangement around the axle rotary hinge represented with X in Figure 12, and the tie point of the through hole 442 of described axle and end cap 434 and both through holes 450 of ridge 446 separates, so the change of distance causes the pivotable of torque tube 28, and consequently leads to the pivotable of mirror assembly 18, so result in the change at the elevation angle of reflecting surface.

Those skilled in the art belonging to the utility model, by easy to understand, when not departing from the utility model (necessary revision) scope, can carry out multiple change, change and amendment to it in addition.

Claims (10)

1. the elevation drive for the heliostat at central tower-type electricity generation station, it is characterized in that: described elevation drive is configured for by making two the hinged parts that rotate each other of described heliostat rotate the elevation angle controlling the reflecting surface of described heliostat, described elevation drive comprises piston, described piston has the piston rod be longitudinally hinged in piston, one in described parts is connected to described piston rod rigidly, and another in described parts is connected to described piston rigidly, wherein said elevation drive comprises ice scraper, described ice scraper is formed at when vertically moving in described piston and is removed from described piston rod by chilled water.

2. elevation drive according to claim 1, is characterized in that: described piston comprises described piston rod and moves the opening passed through, and wherein said ice scraper is arranged on described opening part.

3. elevation drive according to claim 1, is characterized in that: described ice scraper is annular.

4. elevation drive according to claim 3, is characterized in that: described ice scraper comprises to inner blade.

5. elevation drive according to claim 4, is characterized in that: described blade is made up of the material being selected from the group comprising plastics and metal.

6. elevation drive according to claim 1, is characterized in that: described piston is electric piston, and wherein said piston rod uses electric energy and is hinged in described piston.

7. elevation drive according to claim 6, it is characterized in that: described piston comprises threaded shaft, described piston rod is connected to nut component, described nut component is configured to and the coordinating at least partially of described threaded shank, makes the rotation of described threaded shaft cause described nut component vertically moving in described piston.

8. elevation drive according to claim 7, is characterized in that: it also comprises control device, described control device comprises stepper motor, and described control device is configured to utilize electric energy to rotate to make described threaded shaft.

9. elevation drive according to claim 8, is characterized in that: it also comprises gearing, described gearing comprises planetary gear system, and described gearing is driven by described motor and is constructed such that described threaded shaft rotates.

10. a heliostat, is characterized in that: comprise elevation drive according to claim 1.