Thermal collection system with heat compensation device

Abstract

This utility model discloses a heat collection system with a thermal compensation device, comprising: a rotating assembly including a concentrator support frame, the surface of which is provided with a plurality of concentrator mirrors to form a concentrator surface; and a heat collection assembly including a heat collection tube and a heat collection tube support frame, the heat collection tube being mounted on the heat collection tube support frame, the heat collection tube support frame being mounted on one side of the concentrator mirror surface, and the heat collection tube support frame being movably mounted on the concentrator mirror support frame; wherein, when the heat collection tube expands due to heat, it drives the heat collection tube support frame to move relative to the concentrator mirror support frame to perform thermal expansion thermal compensation. This can improve the service life of the heat collection system, and enhance the system's reliability and ease of maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of trough-type heat collection equipment, and in particular to a heat collection system with a heat compensation device. Background Technology

[0002] With the growth of global energy demand and the increasing awareness of environmental protection, solar energy, as a clean and renewable energy source, has received widespread attention. Parabolic trough solar thermal collector systems have been widely used in the field of solar thermal utilization due to their high energy conversion efficiency and low cost. Traditional parabolic trough solar thermal collector modules mainly include key components such as concentrators, drive units, and collector tubes. Concentrators typically consist of a series of reflectors that focus sunlight onto the collector tubes to improve energy collection efficiency.

[0003] However, in existing technologies, some collector tube support frames are fixedly installed on the concentrator support frame, lacking a compensation mechanism to accommodate thermal deformation. During actual operation, when the collector tube undergoes axial thermal expansion due to heat or contraction due to cooling, the fixed support structure constrains the collector tube, generating significant thermal stress. This thermal stress not only exacerbates fatigue damage to the collector tube and its support structure but may also cause bending deformation or even breakage, affecting the system's safety and reliability and shortening the equipment's lifespan. Some existing technologies use a cross-shaped hinge structure as the connection method. While this structure can provide some displacement compensation, its compensation is very limited and cannot effectively cope with the large axial expansion of the collector tube caused by heat.

[0004] Some existing technologies connect multiple collector modules in series and use flexible hoses for centralized thermal displacement compensation. For example, after connecting 6 to 7 collector modules in series, the flexible pipes between the two ends are used to absorb the thermal expansion stress generated by the overall structure. On the one hand, the flexible hoses are prone to fatigue failure due to long-term exposure to alternating stress, affecting the reliability and service life of the system. On the other hand, since the compensation function is concentrated in a few key nodes, the overall system structure is complex, maintenance is difficult, and operational stability is poor. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a heat collection system with a heat compensation device, which can improve the service life of the heat collection system, enhance its reliability, and increase its ease of maintenance.

[0006] A heat collection system with a heat compensation device according to a first aspect embodiment of the present invention includes:

[0007] A rotating assembly includes a condenser lens support frame, the surface of which is provided with a plurality of condenser lenses to form a condenser lens surface;

[0008] A heat collection assembly includes a heat collection tube and a heat collection tube support frame. The heat collection tube is installed on the heat collection tube support frame, and the heat collection tube support frame is installed on one side of the condenser mirror surface. The heat collection tube support frame is movably installed on the condenser mirror support frame.

[0009] When the heat collection tube expands due to heat, it causes the heat collection tube support frame to move relative to the condenser mirror support frame to perform thermal expansion compensation.

[0010] The heat collection system with a thermal compensation device according to an embodiment of this utility model has at least the following beneficial effects: By movably mounting the heat collection tube support frame on the concentrator support frame, the heat collection tube can adaptively displace its support frame relative to the concentrator support frame when it expands due to heat or contracts due to cooling, thereby effectively absorbing the thermal stress generated by temperature changes. This structural design avoids the problems of heat collection tube deformation and damage caused by thermal expansion in traditional fixed support methods, significantly improving the structural stability and operational safety of the heat collection system. The system requires no additional power drive, has a simple structure, responds promptly, and can achieve automatic thermal displacement compensation under various operating conditions, improving the reliability and maintenance convenience of the system, extending the service life of the equipment, and has good engineering application prospects.

[0011] According to some embodiments of this utility model, the rotating assembly further includes a guide rail and a slider. The guide rail is disposed on one of the heat collection tube support and the condenser lens support, and the slider is disposed on the other. The slider and the guide rail are mutually adapted. This achieves bidirectional adaptation and flexible structure. The guide rail and slider can be installed on either the condenser lens support or the heat collection tube support. The flexible structural arrangement facilitates optimized configuration according to the overall system design, improving assembly efficiency.

[0012] According to some embodiments of this utility model, the rotating assembly further includes a guide rail and a slider. The slider is disposed at the lower part of the collector tube support frame, and the guide rail is disposed at the upper part of the condenser lens support frame. The slider and the guide rail are adapted to each other. This structure not only achieves effective compensation for thermal displacement, but also enhances the structural stability and guiding reliability of the system under dynamic operating conditions, which is beneficial to reducing wear, improving operating accuracy, and enhancing the adaptability and durability of the entire heat collection system.

[0013] According to some embodiments of this utility model, the bottom of the guide rail is provided with multiple sand-discharging holes, which are spaced apart along the extension direction of the guide rail and penetrate the inner and outer surfaces of the guide rail. This effectively discharges sand, dust, impurities, and other foreign objects that enter the guide rail, preventing their accumulation during sliding and thus avoiding slider jamming or wear, thereby ensuring the smoothness and stability of the sliding connection between the guide rail and the slider. This sand-discharging structure is simple and practical, especially suitable for solar thermal systems in complex outdoor environments. It helps improve the operational reliability of equipment under windy and sandy conditions, extends the service life of the guide structure, reduces maintenance frequency, and has good engineering application value.

[0014] According to some embodiments of this utility model, multiple collector tube support frames are provided, and these multiple collector tube support frames are spaced apart along the axial direction of the collector tube. Each collector tube support frame is slidably connected to the guide rail via a corresponding slider. This slidable connection of each collector tube support frame to the guide rail not only achieves multi-point uniform support for the collector tube, improving its structural stability and load-bearing capacity, but also allows each support frame to slide synchronously along the guide rail when the collector tube undergoes thermal expansion or contraction due to temperature changes, thereby achieving uniform and coordinated thermal displacement compensation.

[0015] According to some embodiments of this utility model, the guide rail has a hollow structure, and its top surface has a through groove along the axial direction. The circumferential edge of the slider is provided with several contact protrusions, and each contact protrusion slides in contact with the inner wall of the guide rail. This structure enables the slider to have good guidance and running stability when sliding inside the guide rail. At the same time, the multi-point contact method enhances the connection rigidity, improves the load-bearing capacity and anti-eccentric load performance.

[0016] According to some embodiments of this utility model, the contact surface between the contact protrusion and the guide rail is provided with a wear-resistant coating. This can significantly reduce sliding friction resistance and improve the smoothness of relative movement between the guide rail and the slider. At the same time, the wear-resistant coating effectively enhances the wear resistance of the contact surface, slows down damage to the contact surface caused by long-term operation or external environmental influences, thereby extending the service life of the guide structure.

[0017] According to some embodiments of this utility model, the collector tube support frame and the concentrator lens support frame are connected by a linear motion pair. The linear motion pair includes a guide shaft, which is fixedly mounted on either the concentrator lens support frame or the collector tube support frame. A linear bearing is fixedly mounted on the other support frame and coaxially assembled with the guide shaft. The inner ring of the linear bearing has a sliding fit with the guide shaft. When the collector tube expands axially due to heat, it drives the collector tube support frame to move axially along the guide shaft, achieving thermal displacement compensation. When the collector tube expands axially due to heat, it drives the collector tube support frame to move axially along the guide shaft, thereby achieving automatic compensation for thermal displacement. This connection method is compact, easy to install and maintain, and suitable for various types of solar thermal systems.

[0018] According to some embodiments of this utility model, the concentrator support frame has an arc-shaped structure, and the heat collection tube is arranged along the focal line of the concentrator. This enables the concentrator to more effectively focus sunlight onto the surface of the heat collection tube, significantly improving light energy utilization and heat collection efficiency.

[0019] According to some embodiments of this utility model, the solar collector support frame is provided with several rotating bearings, and the solar collector tube is mounted on the solar collector support frame through the rotating bearings. This structural design allows the solar collector tube to rotate flexibly on the support frame, thereby adapting to the rotational movement required by the solar collection system when tracking changes in the solar angle, while not affecting the stable connection between the solar collector tube and the support frame.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of a heat collection system with a heat compensation device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the heat collection component according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of a condenser lens support frame according to an embodiment of the present invention.

[0025] Reference numerals: Condenser lens support frame 100; Heat collector tube support frame 110; Guide rail 120; Slider 130; Sand discharge hole 140; Heat collector tube 150; Rotary bearing 160; Contact protrusion 170. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Reference Figures 1 to 3A heat collection system with a heat compensation device includes:

[0031] The rotating assembly includes a condenser lens support frame 100, the surface of which is provided with a plurality of condenser lenses to form a condenser lens surface;

[0032] The heat collection assembly includes a heat collection tube 150 and a heat collection tube support frame 110. The heat collection tube 150 is installed on the heat collection tube support frame 110. The heat collection tube support frame 110 is installed on one side of the condenser mirror surface. The heat collection tube support frame 110 is movably installed on the condenser mirror support frame 100.

[0033] When the heat collector tube 150 expands due to heat, it causes the heat collector tube support frame 110 to move relative to the condenser mirror support frame 100 to perform thermal expansion compensation.

[0034] By movably mounting the collector tube support frame 110 onto the concentrator mirror support frame 100, the collector tube 150 can adaptively displace its support frame relative to the concentrator mirror support frame 100 when it expands due to heat or contracts due to cooling, thereby effectively absorbing thermal stress caused by temperature changes. This structural design avoids problems such as deformation and damage of the collector tube 150 due to thermal expansion in traditional fixed support methods, significantly improving the structural stability and operational safety of the heat collection system. The system requires no additional power drive, has a simple structure, responds promptly, and can achieve automatic thermal displacement compensation under various operating conditions, improving system reliability and maintenance convenience, extending the service life of the equipment, and has good engineering application prospects.

[0035] As the heat collector tube 150 continues to absorb heat, its temperature rises continuously, causing axial thermal expansion of the tube body. Since the heat collector tube 150 is fixedly mounted on the heat collector tube support frame 110, and the heat collector tube support frame 110 is movably mounted on the condenser lens support frame 100, the thermal expansion of the heat collector tube 150 will drive the heat collector tube support frame 110 to move relative to the condenser lens support frame 100 in a set direction, thereby achieving automatic compensation for thermal expansion displacement.

[0036] This compensation process requires no external driving device; it relies entirely on the force generated by thermal expansion to push the support structure to slide, resulting in rapid response and reliable operation. When the system cools down and the collector tube 150 contracts, the collector tube support frame 110 can also reverse and reset to adapt to the changes in temperature and contraction, ensuring that the system is always in a state of force balance.

[0037] The rotating assembly also includes a guide rail 120 and a slider 130. The guide rail 120 is located at the lower part of the collector tube support frame 110, and the slider 130 is located at the upper part of the condenser lens support frame 100. The slider 130 and the guide rail 120 are mutually compatible. This allows the collector tube support frame 110 to move smoothly relative to the condenser lens support frame 100 while effectively guiding its direction of movement, ensuring motion stability and positioning accuracy during the thermal compensation process.

[0038] The rotating assembly also includes a guide rail 120 and a slider 130. The slider 130 is located at the lower part of the collector tube support frame 110, and the guide rail 120 is located at the upper part of the condenser mirror support frame 100. The slider 130 and the guide rail 120 are mutually compatible. This structure not only achieves effective compensation for thermal displacement, but also enhances the structural stability and guiding reliability of the system under dynamic operating conditions. It helps to reduce wear, improve operating accuracy, and enhance the adaptability and durability of the entire solar collector system.

[0039] During system operation, as the intensity of sunlight changes, the collector tube 150 undergoes axial thermal expansion due to heat absorption and temperature rise. Since the collector tube 150 is fixedly mounted on the collector tube support frame 110, its thermal expansion will cause the entire support frame to shift. At this time, the slider 130 slides in a set direction within the guide rail 120, providing a stable movement path for the collector tube support frame 110, thereby automatically compensating for the displacement caused by thermal expansion. When the system cools down, the support frame can also move in the opposite direction as the collector tube 150 contracts, completing the entire thermal cycle process.

[0040] The guide rail 120 and slider 130 structure provide a sliding guide channel for the collector tube 150 and its support frame, achieving automatic adaptive compensation for axial displacement caused by thermal expansion or contraction without affecting the focusing efficiency. This structure can precisely guide the movement direction of the collector tube support frame 110, preventing displacement caused by uneven heating or external interference, thereby maintaining the focusing consistency between the collector tube 150 and the condenser lens and improving the optical efficiency of the system.

[0041] The bottom of the guide rail 120 is provided with multiple sand discharge holes 140, which are spaced apart along the extension direction of the guide rail 120, and the sand discharge holes 140 penetrate the inner and outer surfaces of the guide rail 120. This effectively discharges sand, dust, impurities, and other foreign objects that enter the guide rail 120, preventing their accumulation during sliding and thus avoiding jamming or wear of the slider 130. This ensures the smoothness and stability of the sliding connection between the guide rail 120 and the slider 130. This sand discharge structure is simple and practical, especially suitable for solar thermal collection systems in complex outdoor environments. It helps improve the operational reliability of the equipment under windy and sandy conditions, extends the service life of the guide structure, reduces maintenance frequency, and has good engineering application value.

[0042] In actual operation, since the system is located in an open environment, sand, dust, and other impurities can easily enter the interior of the guide rail 120 through the gap between the guide rail 120 and the slider 130. If these foreign objects are not removed in time when the slider 130 slides on the guide rail 120, it may cause poor sliding, increased wear, or even jamming. However, by providing a sand discharge hole 140 at the bottom of the guide rail 120, sand, dust, and other impurities entering the guide rail 120 can be automatically discharged through the sand discharge hole 140 by gravity or vibration generated by the movement of the slider 130, thereby keeping the interior of the guide rail 120 clean and ensuring smooth movement of the slider 130.

[0043] Multiple collector tube support frames 110 are provided, spaced apart along the axial direction of the collector tube 150. Each collector tube support frame 110 is slidably connected to the guide rail 120 via a corresponding slider 130. This slidable connection not only provides uniform support to the collector tube 150 at multiple points, improving its structural stability and load-bearing capacity, but also allows each support frame to slide synchronously along the guide rail 120 when the collector tube 150 undergoes thermal expansion or contraction due to temperature changes, thus achieving uniform and coordinated thermal displacement compensation.

[0044] Multiple support frames work together with slider 130 to not only improve the load-bearing capacity of the entire system, but also enhance the stability of the sliding guide, ensuring that each support point maintains a consistent motion trajectory during movement, preventing tilting or offset problems caused by single-point support failure, and ensuring long-term stable operation of the system.

[0045] The guide rail 120 has a hollow structure, and its top surface has a through groove along the axial direction. The slider 130 has several contact protrusions 170 on its circumferential edge, and each contact protrusion 170 slides in contact with the inner wall of the guide rail 120. This structure gives the slider 130 good guidance and running stability when sliding inside the guide rail 120. At the same time, the multi-point contact method enhances the connection rigidity, improves the load-bearing capacity and resistance to eccentric loads.

[0046] The hollow structure design provides a stable embedded guide space for the slider 130, while the through slot allows the slider 130 to be assembled and its motion degrees of freedom controlled above the guide rail 120. Simultaneously, the multiple contact protrusions 170 making multi-point contact with the inner wall of the guide rail 120 further enhances stability and fit during sliding. The multiple contact protrusions 170 on the slider 130 forming multi-point contact with the inner wall of the guide rail 120 not only increases sliding friction but also enhances the load-bearing capacity and anti-eccentric load performance of the guide structure, ensuring stable operation of the system under complex working conditions.

[0047] The contact surfaces of the contact protrusion 170 and the guide rail 120 are coated with a wear-resistant coating. This significantly reduces sliding friction resistance and improves the smoothness of relative movement between the guide rail 120 and the slider 130. Simultaneously, the wear-resistant coating effectively enhances the wear resistance of the contact surfaces, mitigating damage caused by long-term operation or external environmental factors, thereby extending the service life of the guide structure. The wear-resistant coating can be any one of the following: hard chrome coating, titanium nitride coating, or tungsten carbide coating.

[0048] During system operation, the contact protrusion 170 on the slider 130 continuously slides relative to the guide rail 120. Because a wear-resistant coating is applied to the contact surface, the frictional resistance between them is significantly reduced, allowing the slider 130 to move smoothly and steadily on the guide rail 120, avoiding problems such as jamming, accelerated wear, or uncoordinated movement caused by excessive friction.

[0049] The collector tube support frame 110 and the concentrator mirror support frame 100 are connected by a linear motion pair. The linear motion pair includes a guide shaft, which is fixedly mounted on either the concentrator mirror support frame 100 or the collector tube support frame 110. A linear bearing is fixedly mounted on the other support frame and coaxially assembled with the guide shaft. The inner ring of the linear bearing has a sliding fit with the guide shaft. When the collector tube 150 expands axially due to heat, it drives the collector tube support frame 110 to move axially along the guide shaft, achieving thermal displacement compensation. This connection method is compact, easy to install and maintain, and suitable for various types of solar thermal systems.

[0050] In the solar collector system provided by this utility model, the solar collector tube support frame 110 and the condenser lens support frame 100 are connected by a linear motion pair. The linear motion pair includes a guide shaft and a linear bearing: the guide shaft is fixedly mounted on either the condenser lens support frame 100 or the solar collector tube support frame 110, and the linear bearing is mounted on the other component and coaxially assembled with the guide shaft, with its inner ring forming a sliding fit with the guide shaft.

[0051] During system operation, sunlight is reflected and focused onto the surface of the collector tube 150 by a concentrator, causing the collector tube 150 to absorb heat and heat up. As the temperature rises, the collector tube 150 undergoes axial thermal expansion, which in turn drives the collector tube support frame 110 fixed to it to move along the guide shaft. Due to the sliding fit between the linear bearing and the guide shaft, the support frame can slide smoothly along the guide shaft, thereby automatically compensating for the displacement caused by thermal expansion. When the system cools down, the collector tube 150 contracts, and the support frame can also reverse its position along the guide shaft to adapt to the contraction and expansion.

[0052] The concentrator support frame 100 has an arc-shaped structure, and the heat collection tube 150 is positioned along the focusing line of the concentrator. This allows the concentrator to more effectively focus sunlight onto the surface of the heat collection tube 150, significantly improving light energy utilization and heat collection efficiency. This structural design not only facilitates achieving optimal optical focusing but also provides a reasonable spatial layout for the heat collection tube 150 and its support structure, facilitating the integration of thermal compensation devices and improving the overall coordination and functionality of the system.

[0053] The collector tube support frame 110 is equipped with several rotating bearings 160, and the collector tube support frame 110 is mounted on the collector tube support frame 110 via the rotating bearings 160. This structural design allows the collector tube 150 to rotate flexibly on the support frame, thereby adapting to the rotational movement required by the heat collection system when tracking changes in the solar angle, while not affecting the stable connection between the collector tube 150 and the support frame.

[0054] In actual operation, to maximize the absorption of solar radiation, the solar collector system typically needs to adjust its angle according to the sun's position. When the system is rotating for tracking, the collector tube 150 rotates freely relative to the support frame under the action of the rotating bearing 160, without being constrained by the support structure. Simultaneously, the rotating bearing 160 ensures a stable connection between the collector tube 150 and the support frame, satisfying the rotation requirements while guaranteeing structural strength and load-bearing capacity. The collector tube 150 can rotate omnidirectionally without disassembling the connection, enhancing the system's adaptability to changes in the solar radiation angle and improving the sensitivity and response speed of the tracking control.

[0055] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A heat collection system with a thermal compensation device, characterized in that, include: A rotating assembly includes a condenser lens support frame, the surface of which is provided with a plurality of condenser lenses to form a condenser lens surface; A heat collection assembly includes a heat collection tube and a heat collection tube support frame. The heat collection tube is installed on the heat collection tube support frame, and the heat collection tube support frame is installed on one side of the condenser mirror surface. The heat collection tube support frame is movably installed on the condenser mirror support frame. When the heat collection tube expands due to heat, it causes the heat collection tube support frame to move relative to the condenser mirror support frame to perform thermal expansion compensation.

2. The thermal collection system with thermal compensation device according to claim 1, characterized in that, The rotating assembly also includes a guide rail and a slider. The guide rail is disposed on one of the heat collection tube support frame and the condenser lens support frame, and the slider is disposed on the other. The slider and the guide rail are adapted to each other.

3. The thermal collection system with thermal compensation device according to claim 1, wherein, The rotating assembly also includes a guide rail and a slider. The slider is disposed at the lower part of the heat collection tube support frame, and the guide rail is disposed at the upper part of the condenser lens support frame. The slider and the guide rail are adapted to each other.

4. The thermal collection system with thermal compensation device according to claim 3, characterized in that, The bottom of the guide rail is provided with multiple sand discharge holes, which are spaced apart along the extension direction of the guide rail and penetrate the inner and outer surfaces of the guide rail.

5. The thermal collection system with thermal compensation device according to claim 3, wherein, Multiple heat collector tube support frames are provided, and the multiple heat collector tube support frames are spaced apart along the axial direction of the heat collector tube. Each heat collector tube support frame is slidably connected to the guide rail through a corresponding slider.

6. The thermal collection system with thermal compensation device according to claim 3, wherein, The guide rail has a hollow structure and its top surface has a through groove along the axial direction. The slider has several contact protrusions on its circumferential edge, and each contact protrusion slides in contact with the inner wall of the guide rail.

7. The thermal collection system with thermal compensation device according to claim 6, characterized in that, The contact surface between the contact protrusion and the guide rail is provided with a wear-resistant coating.

8. The thermal collection system with thermal compensation device according to claim 1, wherein, The collector tube support frame and the condenser lens support frame are connected by a linear motion pair. The linear motion pair includes a guide shaft, which is fixedly mounted on one of the condenser lens support frame or the collector tube support frame. A linear bearing is fixedly mounted on the other and coaxially assembled with the guide shaft. The inner ring of the linear bearing has a sliding fit with the guide shaft. When the collector tube expands axially due to heat, it drives the collector tube support frame to move axially along the guide shaft, thereby achieving thermal displacement compensation.

9. The thermal collection system with thermal compensation device according to claim 1, wherein, The condenser lens support frame has an arc-shaped structure, and the heat collection tube is located on the focusing line of the condenser lens.

10. The thermal collection system with thermal compensation device according to claim 1, wherein, The collector tube support frame is provided with several rotating bearings, and the collector tube is mounted on the collector tube support frame through the rotating bearings.

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