FR3088108A1 - SOLAR COLLECTOR PROVIDED WITH A SUPPORT WHEEL AND A BASE - Google Patents

Abstract

Solar collector (2) with cylindro-parabolic concentration comprising an exposure tube (5) of a heat-transfer fluid, a parabolic reflector (7) extending opposite the exposure tube (5), and a frame supporting the exposure tube (5) and the parabolic reflector (7), the frame allowing the parabolic reflector (7) to rotate around the exposure tube (5). The chassis comprises at least one support (6) comprising: - a support wheel (13) having on its periphery a curved groove (19); - A base (14) provided with two fingers (30) of tangential support inserted in the curved groove (19) of the support wheel (13).

Description

SOLAR COLLECTOR PROVIDED WITH A SUPPORT WHEEL AND A BASE DESCRIPTION

TECHNICAL FIELD The invention relates to the field of solar energy collection and more particularly relates to a solar collector with cylindro-parabolic concentration allowing the collection of solar thermal energy.

The share of solar energy in the energy mix of most countries in the world is increasing and this progression is set to increase in the future. Mastering solar energy as an energy source for human activities is a major challenge now and in the future. Among the different forms of energy from the sun, one of the most efficient is solar thermal energy, that is to say that from the heat transmitted by radiation from the sun. In this context, solar collectors make it possible to capture the solar radiation and to transmit its thermal energy, generally to a heat-transfer fluid, in the form of heat.

Among the devices for capturing solar thermal energy, there are cylindro-parabolic concentrators consisting of a long mirror in the shape of a parabolic cylinder which is adapted to reflect the sun's rays and to make them converge on a exposure tube running along the entire length of the mirror. A heat transfer fluid circulating in the tube makes it possible to collect the thermal energy thus collected.

STATE OF THE ART Patent application GB2235786 describes such a cylindrical-parabolic solar collector comprising a tube for exposing a heat-transfer fluid, a parabolic reflector extending opposite the exposure tube, and a frame supporting the exposure tube and the parabolic reflector, the frame allowing the reflector to rotate around the exposure tube. The movement of the reflector makes it possible to follow the sun in its daily course and thus makes it possible to collect the solar radiation in optimal conditions. However, such a solar concentrator is made up of several discrete reflectors juxtaposed to form a long collector. In fact, the parabolic reflectors only support a very slight distortion of their positioning without affecting the performance of the collector since the correct positioning of the parabolic reflector and its absence of deformation condition its ability to reflect the sun's rays and to orient them correctly on the exposure tube. In addition, the solar collector described in this document requires its own motorization so that, when several solar collectors are placed side by side to form for example a solar power plant, as many motors as solar collectors will be necessary.

The patent application US4559926 also describes a concentrated cylindrical-parabolic solar collector. This document describes various embodiments making it possible to pool the motorization intended to orient the parabolic reflector, that is to say to rotate it around the exposure cylinder. Thanks to the solutions described, a single motor can be used to control the rotation of several solar collectors simultaneously. However, the solutions described are complex and costly to implement and require mechanical synchronization which is difficult to obtain. Furthermore, the mechanical structure for holding the parabolic reflectors is ineffective and does not guarantee a firm maintenance of the shape of the latter in particular during its rotation around the exposure tube.

PRESENTATION OF THE INVENTION The invention aims to improve the solar collectors with cylindro-parabolic concentration of the prior art.

To this end, the invention relates to a solar collector with cylindroparabolic concentration comprising a tube for exposing a heat-transfer fluid, a parabolic reflector extending opposite the exposure tube, and a frame supporting the exposure tube and the parabolic reflector, the frame allowing the parabolic reflector to rotate around the exposure tube. The chassis comprises at least one support comprising:

- a support wheel on which the parabolic reflector is fixed, this support wheel comprising a central bearing cooperating with the exposure tube, and comprising on its periphery a curved groove extending concentrically with the central bearing;

- a base provided with two tangential support fingers for the support wheel, these tangential support fingers being inserted in the curved groove of the support wheel.

Such a solar collector is particularly suitable for the use of a parabolic reflector with fixed focal length, the focal line of the reflector in the shape of a parabolic cylinder being merged with the exposure tube. The focal length of the reflector does not change during its rotation around the exposure tube.

The mechanical structure of the solar collector according to the invention brings together the elements supporting the parabolic reflector and the elements relating to its rotational movement. This mechanical structure is simple and inexpensive to manufacture while exhibiting excellent performance in terms of resistance of the parabolic reflector. The parabolic reflector can thus be designed in a single piece extending over the entire length of the solar collector, without undergoing any deformation affecting its quality of reflection or its correct focusing on the exposure tube. Within the support wheel, there is no overhang between the elements supporting the parabolic reflector, the elements allowing the rotation of the latter, and the elements allowing the support of the wheel relative to the ground. or to the frame. The support wheel, although combining the functions of supporting the reflector, supporting the exposure tube, and guiding and rotating the reflector, is a part which can be produced simply, quickly and at low cost from, by example, of a laser cut steel sheet.

The solar collector according to the invention is also modular, which allows an easy increase in the collection surface by the addition of parabolic reflectors and their respective support wheel.

The mechanical simplicity of the solar collector also allows the use of few common and recyclable components. For example, the entire solar collector can be made from steel of common friction materials.

Another aspect of the invention relates to a solar collection assembly comprising at least two solar collectors as described above and comprising a rectilinear rack meshing on the support wheel with a support for each of the solar collectors. Alternatively, the solar collection assembly comprises connecting rods mounted in rotation on a support wheel for a support for each of the solar collectors.

Centralized control of the rotation of the parabolic reflectors of the various solar collectors is thus possible at low cost. A limited number of motors, or even only one, can be used for all the solar collectors in the set.

This rotational movement is transmitted from one collector to another by simple and reliable means, without requiring adjustments.

The solar collector according to the invention may have the following additional characteristics, alone or in combination:

- The solar collector comprises a rotation track on the internal edge of the curved groove of the support wheel, the rotation track defining a portion of cylinder coaxial with the central bearing;

- the tangential support fingers have a sliding adjustment in the curved groove;

- the tangential support fingers comprise a rotary roller adapted to roll on the rotation track;

- the support wheel comprises a portion of a circle formed by two parallel curved profiles: an internal curved profile and an external curved profile, the space between the internal curved profile and the external curved profile delimiting the curved groove;

- the support wheel has a curved drive portion extending parallel to the curved groove;

- the curved drive portion is provided with a curved rack;

- the solar collector comprises a motor pinion rotatably mounted on the base and meshing on the drive portion;

- the drive pinion is mounted on the base by means of a pressure device exerting a pressure of the drive pinion on the drive portion and a pressure of the tangential support fingers in the curved groove;

- The base further comprises aligned support fingers;

- the solar collector comprises a rectilinear drive rod of the support wheel adapted to drive the support wheel in rotation and mounted on the support fingers;

- the rectilinear drive rod is a rectilinear rack meshing on the support wheel;

- the base has two flanges between which extend the tangential support fingers;

- The support wheel comprises arms for holding the central bearing connected to the curved groove;

- The support wheel comprises a support plate and in that the parabolic reflector comprises a reinforcing rib fixed on the support plate;

- The parabolic reflector comprises a stiffening tube fixed on the reinforcement rib and fixed on the support plate of the support wheel;

- The solar collector comprises a plurality of said supports comprising a support wheel and a base, these supports being distributed over the length of the solar collector, each support being fixed by its support plate on a reinforcing rib of the parabolic reflector;

- The central bearing comprises a hub provided with a notch adapted to the passage of the exposure tube, as well as removable holding means of the exposure tube on the hub.

PRESENTATION OF THE FIGURES [0015] Other characteristics and advantages of the invention will appear on reading the nonlimiting description which follows, with reference to the appended drawings in which:

- Figure 1 is a perspective view of a set of solar collectors according to the invention;

- Figure 2 and Figure 3 each show in perspective a solar collector according to the invention with its parabolic reflector respectively in two different angular positions;

- Figure 4 shows a support wheel for the solar collector of Figures 2 and 3;

- Figure 5 shows in perspective the base intended to cooperate with the support wheel of Figure 4;

- Figure 6 is a perspective view of a support for the solar collector of Figures 2 and 3;

- Figure 7 is a detail view of Figure 6

- Figure 8 illustrates a variant for the transmission of rotation between two solar collectors;

- Figures 9 and 10 illustrate a variant for the motorization of the rotation of the solar collector.

DETAILED DESCRIPTION In the present description and the claims, the terms "external" and "internal" refer to positioning on the support wheel. Thus, an element of the support wheel qualified as external is closer to its periphery than an element qualified as internal, which is closer to the center of the support wheel.

Figure 1 is a general view of a solar collection assembly formed of solar collectors with cylindro-parabolic concentration according to the invention. Depending on the number of solar collectors present in the assembly, the latter may be intended to form a solar power plant, a device for producing hot water on the roof, or any other application.

The assembly 1 of the example of Figure 1 consists of four solar collectors 2 arranged in parallel. The assembly 1 comprises pipes 3 making it possible to circulate a heat-transfer fluid in the solar collectors 2. The pipes 3 are connected to an operating circuit of the heat-carrying fluid heated by the solar collectors, in known manner (this operating circuit , which can be of any known type, is not shown).

Each of the solar collectors 2 has an exposure tube 5 extending over its entire length. The heat transfer fluid circulated in the collectors 2 by the pipes 3 thus passes into the exposure tubes 5 to be exposed to solar radiation and thus be heated. In the present example, the three solar collectors 2 are identical and each comprise a frame formed by four supports 6 which support the exposure tube 5 as well as a parabolic cylindrical reflector 7.

The supports 6 hold the exposure tube 5 in place and support the reflector 7 by allowing it to rotate around the exposure tube.

The solar collection assembly 1 further comprises a rectilinear drive rod for controlling the rotation of the reflectors 7. The rectilinear drive rod is constituted in the present example by a rectilinear rack 12.

Figures 2 and 3 show one of the solar collectors 2 of Figure 1 in two extreme positions of rotation of the reflector 7. In Figure 2, the reflector 7 is oriented to the left of the figure and corresponds to a extreme position relative, for example, to the position for the rising sun. In FIG. 3, the reflector 7 has been rotated and occupies the opposite extreme position corresponding in this example to the position for the setting sun. The supports 6 are controlled to orient the reflectors 7 optimally as the sun moves. The reflector 7 can be made of a rectangular steel sheet shaped to present a parabolic surface and its reflective surface 8 can be produced for example by a reflective coating, a glued reflective film, a polishing treatment, or any other technique for making a mirror. The reflector 7 has seven reinforcing ribs 9 arranged regularly over its entire length and at its two ends. Four of these reinforcing ribs 9 are fixed respectively on the four supports 6. A stiffening tube 10 also extends opposite over the entire length of the reflector 7 and is fixed to each of the reinforcing ribs 9 and to supports

6.

The reinforcing ribs 9 are fixed by any known means on the reflector 7 such as welding, bonding, fixing lugs, etc. The stiffening tube 10 passes through the reinforcement ribs 9 while being tightened in holes 11 provided for this purpose in the reinforcement ribs 9.

Each of the supports 6 comprises a support wheel 13 and a base 14. Figures 4 and 5 respectively represent the support wheel 13 and the base 14 of one of the supports 6 visible in Figures 1 to 3.

Referring to Figure 4, the support wheel 13 has a portion of a circle 16 which is formed of two profiles 17, 18 curves parallel to each other: an internal curved profile 17 and an external curved profile 18. These two profiles 17, 18 here also consist of a profile with rectangular section. A curved groove 19 is delimited between the two profiles 17, 18. A fork 20 connects the two profiles 17, 18. The curved groove 19 is delimited on its internal edge by a rotation track 23 which is therefore formed by the external surface of the internal profile 17.

The support wheel 13 also includes a central bearing 21 which is held by four arms 22 connecting the bearing 21 to the internal profile 17. The arms 22 position the bearing 21 in the central part of the support wheel 13. The bearing 21 is coaxial with the cylinder in which the rotation track is inscribed. The central bearing 21 is thus directly connected to the second portion of a circle 16 which also ensures the rotation of the reflector 7. The central bearing 21 can be a bearing of friction coated on its internal portion with a material with low coefficient of friction allowing a rotation of the support wheel 13 relative to the exposure tube 5. The bearing 21 can also be a ball bearing or any other device allowing the rotation.

The support wheel 13 further comprises on the outer edge of the outer profile 18 a curved drive portion, which is constituted in the present example by a curved rack 24. The curved rack 24 can be an insert on the external profile 18 or can be produced directly on the external profile 18 by cutting or machining.

The internal profile 17 comprises, for its part, a support plate 25 provided with fixing holes 26 as well as a retaining orifice 27. The fixing holes 26 allow the fixing of a reinforcing rib 9 against the support plate 25 and the holding orifice 27 is provided for the passage of the stiffening tube 10 and its maintenance, for example by a tight fit.

Figure 5 shows in perspective the base 14 intended to cooperate with the support wheel 13. This base 14 is produced in the present example economically from two steel sheets cut and folded so as to form two 28 parallel flanges. A fold of the sheet delimits, for each flange 28, a foot 29 allowing the fixing of the base 14 on the mounting surface provided for the solar collector 2. The two flanges 28 of the base 14 are spaced apart by a distance allowing insertion of the support wheel 13 by its edge between the two flanges 28. The spacing distance of the two flanges 28 is chosen to provide a sliding adjustment on either side of the support wheel 13, to ensure guidance during the rotation of the latter.

Between the two flanges 28 are arranged on the one hand two fingers 30 of tangential support for the support wheel 13, and on the other hand three support fingers 31 for the rectilinear rack 12.

The fingers 30 of tangential support and the fingers 31 of support for the rectilinear rack 12 are here constituted by rotary rollers. They may, as a variant, include bearings, friction pins coated with a material with a low coefficient of friction or any other means allowing on the one hand the rotation of the support wheel 13 resting on the fingers 30 d 'tangential support and secondly the translation of the rectilinear rack 12 resting on the support fingers 31.

The support 6 also has two orifices 32 for mounting the means for motorizing the rotation of the support wheel 13.

6 shows the support 6 and shows the cooperation of the support wheel 13 with the base 14. The support wheel 13 is inserted between the two flanges 28 of the base 14 and the two fingers 30 of tangential support are inserted into the curved groove

19. More specifically, the support wheel 13 is supported by gravity on the base 14 by virtue of the rotation track 23 which is placed against the fingers 30 of tangential support. The two flanges 28 and the tangential bearing fingers 30 thus alone maintain the support wheel 13 according to all the degrees of freedom except rotation around the central bearing 21, that is to say around the tube exposure 5.

The width of the curved groove 19 and the diameter of the tangential support fingers 30 are chosen so that a slight operating clearance remains between the tangential support fingers 30 and the external profile 18 when the internal profile 17 is pressed by gravity against the fingers 30 of tangential support. The tangential support fingers 30 are thus mounted with a sliding adjustment in the curved groove 19 so that the support wheel 13 can rotate in the base 14, the rollers of the fingers 30 rolling on the rotation track 23.

Between the two fingers 30 of tangential support, the flanges 28 of the support 6 have a concave portion allowing, during the rotation of the support wheel 13, the passage of the support plate 25 and the reinforcing rib 9 attached to it.

In addition to the reinforcing rib 9 which is fixed to the support plate 25, the stiffening tube 10 is mounted with a tight fit in the holding orifice 27.

The rectilinear rack 12 is mounted on the support fingers 31 which are all three aligned so that the rack can translate in its longitudinal direction. The position of the support fingers 31 is chosen so that the rectilinear rack 12 meshes with the curved rack 24 of the support wheel 13. Thus, the translation of the rectilinear rack 12 causes the rotation of the support wheel 13 and vice versa.

The support 6 visible in Figure 6 comprises a drive pinion 33 coupled to a shaft 34 intended to be connected to a motor (not shown). The motorization pinion 33 is mounted in the orifices 32.

Depending on the desired position for the reflector 7, the motor controls the rotation of the pinion 33 which causes the rotation of the support wheel 13. The rotation of the support wheel 13 controls two different movements: on the one hand , it controls the rotation of the reflector 7 thanks to the reinforcing rib 9 which is fixed on its support plate 25 as well as to the resumption of force of the stiffening tube 10 in the retaining orifice 27. And other share, the transmission of this rotational movement to the other solar collectors 2 of the assembly 1 by the translation of the rectilinear rack

12. The support wheel 13 in fact meshes the rectilinear rack 12 which in turn transmits the rotational movement to the support wheel 13 of the neighboring support 6. Thus, a single motorization 33, 34 can be used in a solar collection assembly 1.

Figure 7 is a detail view of Figure 6 showing the engagement of the motor pinion 33 on the curved rack 24.

Referring to Figure 6, the central bearing 21 of the support wheel 13 is removable to allow easy assembly and disassembly of the exposure tube 5 on the support wheel 13. The central bearing 21 thus comprises two removable cheeks 35 and two half bearings 36. The two cheeks 35 are removably fixed, for example by screws, to a hub 37 which is connected to the periphery of the support wheel 13 by the arms 22. The hub 37 comprises a notch 38 allowing the passage of the exposure tube. The cheeks 35 hold in place two half bearings 36, made of a sliding material with a low coefficient of friction, which are adjusted on the exposure tube 5 to allow and guide the rotation of the support wheel 13 around the tube. exposure 5. To mount or dismount the exposure tube 5 of the central bearing 21, the two cheeks are removed, which then makes it possible to deposit the two half bearings 36, and to pass the tube through the notch 38.

Alternative features can be implemented without departing from the scope of the invention. In particular, the central bearing 21, the fingers 30 of tangential support, and the support fingers 31 may include ball bearings or any other means of facilitating rotation. However, a particularly advantageous construction of the assembly 1 is produced from simple, inexpensive and recyclable parts. Thus, the support wheel 13 is adapted to be manufactured in one piece, for example by laser cutting, in a steel sheet, by a single laser cutting operation. And the bearings, and the fingers being produced by simple friction rings made of materials with a low coefficient of friction.

The set 1 of solar collectors 2 is modular and can include as many solar collectors 2 as necessary, the length of the latter can be adapted by increasing the number of reinforcing ribs 9. Likewise, a single rectilinear rack 12 may be sufficient to transmit the rotational movement of one of the motorized solar collectors 2 to all the other solar collectors 2. However, as many rectilinear racks 12 as there are supports 6 can be provided if the mechanical constraints of the device so require. The rotating transmission elements of the support wheels 6 can be optimally placed on the solar collectors, depending on the site conditions (wind speed in particular) and the characteristics of the solar collection assembly (length of the collectors, number collectors, etc.). This positioning of the transmission elements can be modified or supplemented easily, to adapt to possible changes in the capacity of the assembly (increase in the number of solar collectors, etc.).

The rotation of the support wheels 13 is made, in the example described above, by the rectilinear rack 12 and the curved racks 24. However, other equivalent mechanical means can of course be used, such as friction drive means, where the drive portion of the support wheel 13 has a friction surface driven in friction rotation with a straight rod. Roller chains, belts, or any known mechanical means can also be used.

Figures 8 to 10 illustrate such possible variants for the rotation control of the support wheels 13, and for the motorization of this rotation. In these figures, the elements identical or similar to those described precisely are numbered with the same reference numbers to the figs. According to these variants, with reference to FIG. 8, the transmission of rotation between two support wheels 13 of two manifolds 2 is ensured by a connecting rod 40. Each connecting rod 40 is bent to allow the angular movement of the support wheel 13 without interfere with the central bearings 21. The connecting rods 40 are connected by a pivot link 41, at each of their ends, with a support wheel 13. In the present example, this pivot link 41 is located between the groove 19 and the orifice 27. The connecting rods 40 guarantee the maintenance of the center distance and of the parallelism between the collectors 2.

The motorization of the rotation of the support wheels 13 is ensured by a single motor as above. This motorization is ensured by the curved drive portion 24 of a support wheel 13. This curved drive portion 24 is here smooth and is formed by the external cylinder face of the support wheel 13. Optionally, this portion d curved drive 24 may include a coating or a non-slip treatment.

Referring to Figure 9, the motor pinion 33 is mounted on movable bearings 42 to mesh with the curved drive portion 24.

Figure 10 shows the motor pinion 33 and its drive shaft 34 by the motor (not shown). The motorized pinion 33 here consists of a cylindrical drive roller whose external surface 43 is a material suitable for friction drive, for example an elastomer.

The shaft 34 of the drive pinion 33 is mounted on the movable bearings 42 by means of pressure screws 44. During assembly, the pressure screws 44 are sufficiently tight so that the drive pinion 33 exerts on the curved drive portion 24 sufficient effort to pass the engine torque by grip. It also removes all functional games. The pressure exerted by the motor pinion 33 on the curved drive portion 24 causes a reaction of the contact between the tangential bearing fingers 30 against the rotation track 23 of the curved groove 19.

Common materials such as steel are envisaged in the description, but any suitable material can be envisaged, in particular aluminum, galvanized or stainless steel, composites, technical polymers.

Claims (20)

1. Solar collector (2) with cylindro-parabolic concentration comprising an exposure tube (5) of a heat transfer fluid, a parabolic reflector (7) extending opposite the exposure tube (5) , and a frame supporting the exposure tube (5) and the parabolic reflector (7), the frame allowing the parabolic reflector (7) to rotate around the exposure tube (5), characterized in that the frame comprises at least one support (6) comprising: - a support wheel (13) on which the parabolic reflector (7) is fixed, this support wheel (13) comprising a central bearing (21) cooperating with the exposure tube (5), and comprising on its periphery a curved groove (19) extending concentrically with the central bearing (21); - a base (14) provided with two tangential support fingers (30) for the support wheel (13), these tangential support fingers (30) being inserted in the curved groove (19) of the support wheel ( 13). 2. Solar collector according to the preceding claim, characterized in that it comprises a rotation track (23) on the internal edge of the curved groove (19) of the support wheel (13), the rotation track (23) defining a portion of cylinder coaxial with the central bearing (21). 3. Solar collector according to any one of the preceding claims, characterized in that the tangential bearing fingers (30) have a sliding fit in the curved groove (19). 4. Solar collector according to one of claims 2 or 3, characterized in that the tangential bearing fingers (30) comprise a rotary roller adapted to roll on the rotation track (23). 5. Solar collector according to any one of the preceding claims, characterized in that the support wheel (13) comprises a portion of a circle (16) formed by two profiles (17, 18) parallel curves: an internal curved profile (17 ) and an external curved profile (18), the space between the internal curved profile (17) and the external curved profile (18) delimiting the curved groove (19). 6. Solar collector according to any one of the preceding claims, characterized in that the support wheel (13) has a curved drive portion (24) extending parallel to the curved groove (19). 7. Solar collector according to any one of the preceding claims, characterized in that the curved drive portion is provided with a curved rack (24). 8. Solar collector according to one of claims 6 or 7, characterized in that it comprises a motor pinion (33) rotatably mounted on the base (14) and meshing on the drive portion (24). 9. Solar collector according to claim 8, characterized in that the drive pinion (33) is mounted on the base (14) by means of a pressure device (44) exerting pressure on the drive pinion (33) on the drive portion (24) and a pressure of the fingers (30) of tangential support in the curved groove (19). 10. Solar collector according to any one of the preceding claims, characterized in that the base (14) further comprises aligned fingers (31) of support. 11. Solar collector according to claim 10, characterized in that it comprises a rectilinear drive rod (12) of the support wheel (13) adapted to rotate the support wheel (13) and mounted on the fingers (31) support. 12. Solar collector according to claim 11, characterized in that the rectilinear drive rod is a rectilinear rack (12) meshing on the support wheel (13). 13. Solar collector according to any one of the preceding claims, characterized in that the base (14) has two flanges (28) between which extend the fingers (30) of tangential support. 14. Solar collector according to any one of the preceding claims, characterized in that the support wheel (13) comprises arms (22) for holding the central bearing connected to the curved groove (19). 15. Solar collector according to any one of the preceding claims, characterized in that the support wheel (13) comprises a support plate (25) and in that the parabolic reflector (7) comprises a reinforcing rib (9) fixed on the support plate (25). 16. Solar collector according to claim 15, characterized in that the parabolic reflector (7) comprises a stiffening tube (10) fixed on the reinforcement rib (9) and fixed on the support plate (25) of the wheel. support (13). 17. Solar collector according to one of claims 15 or 16, characterized in that it comprises a plurality of said supports (6) provided with a support wheel (13) and a base (14), these supports ( 6) being distributed over the length of the solar collector (2), each support (6) being fixed by its support plate (25) on a reinforcing rib (9) of the parabolic reflector (7). 18. Solar collector according to any one of the preceding claims, characterized in that the central bearing (21) comprises a hub (37) provided with a notch (38) adapted to the passage of the exposure tube (5), thus as removable holding means (35, 36) of the exposure tube (5) on the hub (37). 19. Solar collection assembly comprising at least two solar collectors according to one of claims 9 to 18, characterized in that it comprises a rectilinear rack (12) meshing on the support wheel (13) with a support (6 ) from each of the solar collectors (2). 20. Solar collection assembly comprising at least two solar collectors according to one of claims 9 to 18, characterized in that it comprises connecting rods (40) mounted in rotation on a support wheel (13) of a support (6) of each of the solar collectors (2).