Concentrated solar power slew drive and heliostat tracking system

Abstract

A concentrated solar power slew drive and a heliostat tracking system, comprising a horizontal slewing mechanism (100) and a pitching slewing mechanism (200). The horizontal slewing mechanism (100) comprises a first box body (110), a first worm gear (120), and a first worm (130). The first worm gear (120) and the first worm (130) are mounted within the first box body (110). The pitching slewing mechanism (200) comprises a second box body (210), a second worm gear (220), and a second worm (230), wherein the second box body (210) is fixedly connected to the first worm gear (120), and the second worm gear (220) and the second worm (230) are mounted within the second box body (210). When the first worm (130) drives the first worm gear (120) to rotate, the first worm gear (120) drives the pitching slewing mechanism (200) to rotate. The first worm (130) and the second worm (230) are both horizontally positioned, and when the horizontal slewing mechanism (100) and the pitching slewing mechanism (200) are in an initial state, the first worm (130) and the second worm (230) are perpendicular to one another. This helps to better facilitate on-site installation and debugging, and to easily and quickly distinguish the installation orientation. In addition, cable swing amplitude is smaller, which is beneficial to improving cable service life.

Description

Optical thermal rotary driver and heliostat tracking system TECHNICAL FIELD

[0001] The present application relates to the technical field of optical thermal support, and in particular to an optical thermal rotary driver and heliostat tracking system. BACKGROUND

[0002] The heliostat tracking system is the core of the optical thermal power generation. The heliostat tracking system tracks the sun, so that the reflected light can be accurately projected onto the heat absorber heat exchange surface placed on the top of the receiving tower. The heat absorber converts the solar energy into heat energy and heats the medium (water or other fluids) flowing in the pipe to generate medium-high temperature steam, thereby driving the steam turbine generator set to generate electricity.

[0003] In the prior art, the two motors of the heliostat tracking system with a double rotary mechanism are mostly horizontally and parallel arranged, which causes the structure weight to be concentrated on the same side of the stand column, and also easily causes the unbalanced load and overturning. Moreover, the parallel arrangement of the two motors is not conducive to the user to distinguish the installation direction, affects the on-site installation and debugging, and causes the installation progress to be slow.

[0004] Therefore, how to improve the technical defects existing in the prior art has always been a problem to be solved by those skilled in the art.

[0005] Content of the utility model

[0006] The purpose of the present application is to provide an optical thermal rotary driver and heliostat tracking system, which is more helpful for on-site installation and debugging, facilitates the user to quickly distinguish the installation direction, and speeds up the installation progress.

[0007] The technical scheme provided by the present application is as follows:

[0008] An optical thermal rotary driver comprises:

[0009] a horizontal rotary mechanism and a pitching rotary mechanism;

[0010] The horizontal rotary mechanism comprises a first box body, a first worm wheel and a first worm, a first installation cavity with a first opening is formed in the first box body, the first worm wheel and the first worm are both installed in the first installation cavity, and the first worm wheel and the first worm are coupled;

[0011] The pitching rotary mechanism comprises a second box body, a second worm wheel and a second worm, the second box body is installed at the first opening and fixedly connected with the first worm wheel, and a second installation cavity for installing the second worm wheel and the second worm is formed in the second box body, and the second worm wheel and the second worm are coupled; when the first worm drives the first worm wheel to rotate, the first worm wheel drives the pitching rotary mechanism to rotate;

[0012] The first worm and the second worm are both horizontally placed, and the first worm and the second worm are vertically arranged when the horizontal rotation mechanism and the pitching rotation mechanism are in the initial installation state.

[0013] In some embodiments, the first mounting cavity extends to an annular boss in the direction away from the side of the first opening, the annular boss is arranged in the first worm, the first bearing is further arranged outside the annular boss and between the annular boss and the first worm in the radial direction; and

[0014] The second worm extends to a rotation shaft on each end, the second mounting cavity is provided with two second bearings, and the two second bearings are arranged on the rotation shafts on the axial direction of the second worm.

[0015] In some embodiments, the number of the first bearings is two, the two first bearings are arranged on the axial direction of the first worm, and a third sealing member is further arranged between the two first bearings.

[0016] In some embodiments, a first sealing member is arranged between the first opening edge and the first worm, and a second sealing member is arranged between the annular boss and the first worm.

[0017] In some embodiments, one end of the annular boss towards the first opening is movably connected with a pressing member, the pressing member has a pressing edge for pressing the first bearing, and the second sealing member is arranged between the pressing edge and the first worm.

[0018] In some embodiments, when the horizontal rotation mechanism is in the initial installation state, the first opening of the first box body faces upwards.

[0019] In some embodiments, the horizontal rotation mechanism further comprises a first motor, the power output shaft of the first motor is drivingly connected with the first worm, and the pitching rotation mechanism further comprises a second motor, the power output shaft of the second motor is drivingly connected with the second worm.

[0020] When the horizontal rotation mechanism and the pitching rotation mechanism are in the initial installation state, the first motor and the second motor are vertically arranged.

[0021] In some embodiments, the second box body is provided with a second opening on each end in the axial direction of the second worm, and the two second openings are both covered with an adapter flange.

[0022] Two said adapter flanges are fixedly connected with the slewing shafts on the two axial sides of the second worm wheel, the second worm wheel and the second bearing are clamped in the second mounting cavity, and a fourth sealing element is arranged between the second opening edge and the adapter flange.

[0023] In some embodiments, the first box body is provided with a first oil injection hole at the first worm, the first oil injection hole is in communication with the first mounting cavity, and a blocking element is arranged at one end of the first oil injection hole away from the first mounting cavity.

[0024] The second box body is provided with a second oil injection hole at the second worm, the second oil injection hole is in communication with the second mounting cavity, and a blocking element is arranged at one end of the second oil injection hole away from the second mounting cavity.

[0025] The application also provides a heliostat tracking system, comprising:

[0026] A column, a driver arranged at the top end of the column, a main shaft in driving connection with the driver, and a lens assembly mounted on the main shaft; wherein the driver is the light-heat slewing driver provided in any of the above embodiments, the first box body is fixedly connected to the top end of the column, and the main shaft is in driving connection with the pitch slewing mechanism.

[0027] The horizontal slewing mechanism is used to drive the pitch slewing mechanism, the main shaft and the lens assembly to rotate around the central axis of the column, and the pitch slewing mechanism is used to drive the main shaft and the lens assembly to perform pitch movement.

[0028] The technical effect of the application is:

[0029] 1. In the application, the horizontal slewing mechanism and the pitch slewing mechanism are in the initial installation state, the first worm and the second worm are horizontally placed and perpendicular to each other, which is conducive to the vertical distribution installation of the first motor and the second motor, helps on-site installation and debugging, and facilitates quick and easy differentiation of the installation direction, and the wire swing amplitude is smaller, which is conducive to improving the wire life.

[0030] 2. In the application, the first worm is provided with first bearings on both sides in the axial direction, and the two first bearings form a structure similar to a bearing seat, realizing double-sided support of the first worm, not only increasing the stability of the first worm, but also reducing the installation difficulty and improving the quality stability in the production process.

[0031] 3、The first sealing member and the second sealing member are arranged to form a sealed oil storage space in the first mounting cavity, so as to store the lubricating medium, effectively reduce the risk of oil leakage, reduce the amount of lubricating medium, and save costs. In addition, the pitch and rotation mechanism is installed at the first opening, which can better cover the first sealing member and the second sealing member, avoid direct contact of the first sealing member and the second sealing member with the outside or direct sunlight, improve the anti-aging ability and service life of the first sealing member and the second sealing member, and better prevent oil leakage.

[0032] 4、In the application, the horizontal rotation mechanism is suitable for being installed on the stand column, and is used to drive the pitch and rotation mechanism and the main shaft connected with the pitch and rotation mechanism to rotate around the central axis of the stand column, so as to change the azimuth angle of the heliostat tracking system. When the horizontal rotation mechanism is in the initial installation state, the first opening on the first box body faces upward, which is more conducive to directly connecting the first worm gear in the first box body with the pitch and rotation mechanism, so as to conveniently and quickly drive the pitch and rotation mechanism and the main shaft to rotate. On the other hand, the lubricating medium in the first mounting cavity can be located at the bottom of the first mounting cavity due to its own gravity, and is less likely to flow out from the first opening, thereby effectively reducing the risk of oil leakage.

[0033] 5、In the application, the first worm gear and the first worm, and the second worm gear and the second worm, all adopt a double envelope torus worm drive structure, which has large torque transmission, stable efficiency, strong self-locking, and ensures the operation stability of the light and heat rotary driver.

[0034] 6、In the application, all the parts used in the whole light and heat rotary driver are suitable for batch production, and a large number of standard parts (such as the first worm gear, the first worm, the first motor, etc.) are used, which effectively reduces the cost of batch production. BRIEF DESCRIPTION OF DRAWINGS

[0035] The application will be further described in detail below in combination with the drawings and specific embodiments:

[0036] Fig. 1 is a perspective structural schematic view of the light and heat rotary driver provided by the application in an embodiment;

[0037] Fig. 2 is a sectional view of the light and heat rotary driver provided by Fig. 1 in a state;

[0038] Fig. 3 is a sectional view of the light and heat rotary driver provided by Fig. 1 in another state;

[0039] Fig. 4 is a perspective structural schematic view of the horizontal rotation mechanism provided by the application in an embodiment;

[0040] Fig. 5 is a perspective structural schematic view of the horizontal rotation mechanism provided by Fig. 4 after removing the pressing member;

[0041] Fig. 6 is a perspective view of the horizontal rotary mechanism of Fig. 4 in a state without the pressing member and the first box;

[0042] Fig. 7 is a perspective view of the horizontal rotary mechanism of Fig. 4 in another state without the pressing member and the first box.

[0043] BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 100, horizontal rotary mechanism; 110, first box; 111, first mounting cavity; 112, annular boss; 113, first oil hole; 120, first worm gear; 130, first worm; 140, first motor; 150, first sealing member; 160, second sealing member; 170, first bearing; 180, pressing member; 181, pressing edge; 190, third sealing member;

[0045] 200, pitching rotary mechanism; 210, second box; 211, second mounting cavity; 212, first sub-box; 213, second sub-box; 214, fifth sealing member; 215, second oil hole; 220, second worm gear; 230, second worm; 240, second motor; 250, second bearing; 260, adapter flange; 270, fourth sealing member;

[0046] 300, blocking member. DETAILED DESCRIPTION

[0047] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the application. However, persons having ordinary skill in the art will readily recognize that embodiments of the application can be practiced without these specific details. In other instances, well-known structures, devices, circuits, and processes have not been described in detail so as not to unnecessarily obscure aspects of the application.

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the specific embodiments of the present application will be described in detail with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0049] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked.

[0050] In this document, unless otherwise indicated and limited, the term "connection" should be interpreted broadly, for example, it can be fixed connection, or can be detachable connection, or can be integrally connected; or, it can be mechanical connection, or can be electrical connection; or, it can be directly connected, or also can be indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above-mentioned terms in this application can be understood according to the specific circumstances.

[0051] In the embodiments shown in the drawings, the indications of directions, such as up, down, left, right, front, and back, etc., are not absolute but relative when describing the structure and movement of various components, and are not used to limit the direction of actual use of the product.

[0052] In addition, in the description of the present application, ordinal numbers, such as "first", "second", etc., are only used to distinguish the description of the associated objects, and cannot be understood as indicating or implying the relative importance or order between the associated objects.

[0053] According to one example embodiment provided by the present application, referring to FIGS. 1-3, a light-heat rotary driver includes a horizontal rotary mechanism 100 and a pitching rotary mechanism 200. The horizontal rotary mechanism 100 is installed at the top of a stand column, and the pitching rotary mechanism 200 is installed above the horizontal rotary mechanism 100 for interfacing with a main shaft. When the horizontal rotary mechanism 100 operates, the pitching rotary mechanism 200 and the main shaft thereon are driven to rotate around the central axis of the stand column, thereby changing the azimuth angle of the lens assembly on the main shaft; when the pitching rotary mechanism 200 operates, the stand column and the horizontal rotary mechanism 100 are not affected, and the pitching rotary mechanism 200 only drives the main shaft to rotate around its own central axis, thereby changing the pitch angle of the lens assembly on the main shaft.

[0054] In the present embodiment, the horizontal rotary mechanism 100 can specifically include a first box body 110, a first worm gear 120, and a first worm 130. The first box body 110 has a first installation cavity 111 with a first opening formed therein, and the first worm gear 120 and the first worm 130 are both installed in the first installation cavity 111 and are coupled. At this time, the pitching rotary mechanism 200 is preferably installed at the first opening of the first box body 110 and is fixedly connected with the first worm gear 120. In this way, when the first worm 130 drives the first worm gear 120 to rotate, the first worm gear 120 can drive the pitching rotary mechanism 200 to rotate together.

[0055] Specifically, referring to FIGS. 1-3, the pitching rotary mechanism 200 can specifically include a second box body 210, a second worm wheel 220 and a second worm 230, the second worm wheel 220 and the second worm 230 are coupled, the second box body 210 is fixedly connected with the first worm wheel 120, and the second box body 210 is formed with a second mounting cavity 211 for mounting the second worm wheel 220 and the second worm 230, and the first worm 130 and the second worm 230 are both horizontally placed. Wherein, the horizontal rotary mechanism 100 and the pitching rotary mechanism 200 are vertically arranged when in the initial installation state.

[0056] In the prior art, the two worms in the light-heat rotary driver adopting the double rotary mechanism (the horizontal rotary mechanism 100 and the pitching rotary mechanism 200) are mostly horizontally and parallel arranged, which causes the structure weight to be concentrated on the same side of the stand column, while in the embodiment, the first worm 130 and the second worm 230 provided by the horizontal rotary mechanism 100 and the pitching rotary mechanism 200 when in the initial installation state are horizontally arranged and perpendicular to each other, and the stress is more dispersed, so that the light-heat rotary driver has stronger anti-overturning ability, is stable and reliable, and has long service life. In addition, the vertical distribution of the first motor 140 and the second motor 240 also helps the on-site installation and debugging, and facilitates the user to quickly distinguish the installation direction.

[0057] Specifically, referring to FIG. 1, the horizontal rotary mechanism 100 further includes a first motor 140, which is preferably a brushless DC speed reduction motor, and the power output shaft of which is drivingly connected with the first worm 130. The input power is transmitted to the first worm 130 after being reduced by the first motor 140, the first worm 130 drives the first worm wheel 120 and the pitching rotary mechanism 200 to rotate around the central axis of the stand column, and in turn drives the whole mirror assembly in the heliostat tracking system to rotate around the central axis of the stand column. Correspondingly, the pitching rotary mechanism 200 further includes a second motor 240, which is preferably a brushless DC speed reduction motor, and the power output shaft of which is drivingly connected with the second worm 230. The input power is transmitted to the second worm 230 after being reduced by the second motor 240, the second worm 230 drives the second worm wheel 220 to rotate, the second worm wheel 220 drives the main shaft to rotate, and in turn drives the whole mirror assembly to rotate around the central axis of the main shaft.

[0058] Wherein, the first motor 140 and the second motor 240 can be in the running state at the same time.

[0059] Preferably, at most one of the first motor 140 and the second motor 240 is in the running state. That is, only one motor is in the running state and the other motor is stationary when the light-heat rotary driver is driven, which can further improve the anti-overturning ability of the light-heat rotary driver.

[0060] Moreover, compared with the case that both motors are running, the wire swing range of the light-heat rotary driver provided by the embodiment is smaller during driving, only one wire swings in the range of ±90°, the wire is not easy to be consumed, and the service life is long; both wires need to move when both motors are running, the wire is more likely to be worn and consumed, and the service life is short.

[0061] In one specific embodiment, the first mounting cavity 111 extends away from one side of the first opening towards the direction of the first opening and has an annular boss 112 penetrating the first worm gear 120. A first sealing member 150 is arranged between the first opening edge and the first worm gear 120, and a second sealing member 160 is arranged between the annular boss 112 and the first worm gear 120.

[0062] In the embodiment, the first sealing member 150 is arranged between the first opening edge and the first worm gear 120, and the second sealing member 160 is arranged between the annular boss 112 and the first worm gear 120, which is beneficial to form a sealed oil storage space in the first mounting cavity 111 for storing lubricating medium, and is beneficial to the full use and effective sealing of the lubricating medium, thereby reducing the cost and prolonging the maintenance interval.

[0063] In addition, in the embodiment, the pitch-rotation mechanism 200 is installed at the first opening of the first box body 110, which can shield the first sealing member 150 at the first opening and the second sealing member 160 at the annular boss 112, avoid direct contact of the first sealing member 150 and the second sealing member 160 with the outside world or direct sunlight, effectively improve the anti-aging ability and service life of the first sealing member 150 and the second sealing member 160, further reduce the risk of oil leakage, and the structure is more reasonable and has strong practicality. In the prior art, the box body driven by the horizontal rotation of the heliostat tracking system with double rotation mechanisms is usually installed in an opening-down manner and is sealed by a sealing member to avoid oil leakage, but during long-time operation, the sealing structure thereon is easy to age and wear due to the influence of strong wind, etc., thereby a gap is generated, and the risk of oil leakage is increased.

[0064] In the embodiment, the first opening is formed at the top of the first box body 110 to form an opening-up box body structure, which is beneficial to the direct butt joint of the pitch-rotation mechanism 200 above the horizontal rotation mechanism 100 with the first worm gear 120 in the first box body 110 through the first opening, and the installation is more convenient and fast.

[0065] Moreover, considering that the lubricating medium is more likely to be at the bottom of the first mounting cavity 111 under the action of gravity, the first opening in the embodiment is located at the upper position of the first box body 110, and compared with the structure in the prior art in which the first opening is formed at the lower position, the lubricating medium in the embodiment is less likely to leak from the first opening, and the leakage prevention effect is better.

[0066] Specifically, referring to FIG. 2, the first box body 110 is provided with a first oil injection hole 113 communicating with the first installation cavity 111 at the first worm 130, through which the user can inject lubricating medium into the first worm wheel 120 and the first worm 130 to ensure stable operation of the horizontal rotation mechanism 100. Wherein, the end of the first oil injection hole 113 away from the first installation cavity 111 is provided with a plugging piece 300, so that after the user injects the lubricating medium, the oil storage space can be maintained in a sealed state to ensure the effective sealing of the lubricating medium.

[0067] As a preferred, referring to FIG. 2, FIG. 3 and FIG. 6, the annular boss 112 is further sleeved with a first bearing 170, which is located between the annular boss 112 and the first worm wheel 120 in the radial direction, which is conducive to the more stable and smooth rotation of the first worm wheel 120, thereby effectively improving the driving effect of the light-heat rotary driver on the lens assembly, making the lens assembly more stable and smooth to rotate to the required azimuth angle, which is conducive to improving the control reliability of the light-heat rotary driver, and has strong practicability.

[0068] Further, the number of the first bearing 170 is two, and the two first bearings 170 are respectively arranged at the two ends of the first worm wheel 120 in the axial direction, forming a structure similar to a bearing seat, which realizes the bilateral support of the first worm wheel 120, compared with the common unilateral support in the prior art, not only further increases the stability of the first worm wheel 120, but also reduces the installation difficulty of the first worm wheel 120, improves the quality stability in the production process, and has strong practicability.

[0069] Among them, the two first bearings 170 are preferably double-cone roller bearings. The horizontal rotation mechanism of the existing light-heat rotary driver generally selects to use rotary bearings and steel wire raceway bearings for unilateral support, which usually causes unbalanced load, while the double-cone roller bearings can well avoid this problem. The conical roller bearing is a separate bearing, which is generally 100% interchangeable between the outer ring and the inner assembly of different sizes, which is conducive to installation, disassembly and maintenance. At the same time, the conical roller bearing also has the advantages of reliable operation, long service life, compact structure, high bearing capacity and lifelong lubrication, which is conducive to the long-term stable operation of the first worm wheel 120.

[0070] In one example embodiment, referring to FIG. 2 and FIG. 3, a third sealing piece 190 is further arranged between the two first bearings 170. Specifically, the inner wall surface of the first worm wheel 120 is provided with a boss, and the two first bearings 170 are respectively abutted at the two ends of the boss in the axial direction of the first worm wheel 120, and the third sealing piece 190 is arranged between the boss and the annular boss 112.

[0071] In the embodiment, the third seal 190 separates the two first bearings 170 at the two ends of the first worm gear 120 in the rotation axis direction, and each forms an independent chamber, is lubricated separately, and does not interfere with each other, thereby avoiding that the lubricating medium on the first bearing 170 at the upper end of the first worm gear 120 flows to the lower part of the first mounting cavity 111 under the action of gravity, and causing the first bearing 170 at the upper end of the first worm gear 120 to lose oil due to the loss of lubricating medium. In addition, each chamber is lubricated separately, which greatly reduces the amount of lubricating grease, and also ensures that the lubrication in each chamber is fully utilized and effectively sealed, thereby reducing the cost and prolonging the maintenance-free time.

[0072] Moreover, the third seal 190 in the embodiment is also shielded by the pitch and roll mechanism 200, and does not directly contact the outside world or is directly irradiated by the sun, has strong anti-aging ability and long service life, effectively reduces the risk of oil leakage, and has a more reasonable structure and strong practicality.

[0073] Specifically, the annular boss 112 is provided with an opening at one end facing the opening, which is matched with the pressing member 180. The pressing member 180 is movably connected with the annular boss 112, and has a pressing edge 181, which can press the first bearing 170 in the first mounting cavity 111, so as to fix the position of the first bearing 170.

[0074] In the embodiment, the pressing member 180 and the annular boss 112 are threadedly connected, and the first bearing 170, the first worm gear 120 and the first housing 110 are fixed by screwing the pressing member 180 to the annular boss 112, which is convenient to operate.

[0075] Referring to FIGS. 2-5, to ensure the sealing of the horizontal rotation mechanism 100, the first seal 150 is arranged between the first opening edge and the first worm gear 120, and the second seal 160 is arranged between the pressing edge 181 and the first worm gear 120. At this time, the first worm gear 120 and the first housing 110 have two sealing structures, forming double sealing, and the sealing effect is better. Moreover, the first seal 150 and the second seal 160 in the embodiment are also shielded by the pitch and roll mechanism 200, and do not directly contact the outside world or are directly irradiated by the sun, have strong anti-aging ability and long service life, better reduce the risk of oil leakage of the first housing 110, and have a more reasonable structure and strong practicality.

[0076] Preferably, referring to FIG. 3, the second mounting cavity 211 is provided with a second bearing 250 sleeved on the second worm wheel 220. In this embodiment, the second bearing 250 is located between the second worm wheel 220 and the second housing 210, which can provide radial support for the second worm wheel 220 and make the second worm wheel 220 rotate more stably and smoothly, thereby effectively improving the driving effect of the light-heat rotary driver on the lens assembly, making the lens assembly rotate to the required pitch angle more stably and smoothly, and being beneficial to improving the control reliability of the light-heat rotary driver, and having strong practicability.

[0077] Further, the number of the second bearing 250 is two, and the two ends of the second worm wheel 220 respectively extend to the two sides with rotary shafts. At this time, the two second bearings 250 are sleeved on the rotary shafts on the two axial sides of the second worm wheel 220, which realizes double-side support for the second worm wheel 220, compared with the common single-side support in the prior art, not only further increases the stability of the second worm wheel 220, but also reduces the installation difficulty of the second worm wheel 220, improves the quality stability in the production process, and has strong practicability.

[0078] Among them, the two second bearings 250 are preferably double-cone roller bearings. The double-cone roller bearing is a separate bearing, which is generally 100% interchangeable between different sizes of outer rings and inner assemblies, which is beneficial to installation, disassembly and maintenance. At the same time, the double-cone roller bearing also has the advantages of reliable operation, long service life, compact structure, high carrying capacity, and lifelong lubrication, which is beneficial to the long-term stable operation of the second worm wheel 220.

[0079] Specifically, referring to FIG. 3, the second housing 210 is provided with second openings at both ends in the direction of the rotary shaft of the second worm wheel 220, and the two second openings are covered with adapter flanges 260. The two adapter flanges 260 are fixedly connected with the rotary shafts on the two axial sides of the second worm wheel 220, clamping the second worm wheel 220 and the second bearing 250 in the second mounting cavity 211, and the fourth sealing element 270 is arranged between the edge of the second opening and the adapter flange 260.

[0080] In this embodiment, by arranging the fourth sealing element 270 at the two second openings of the second housing 210 and covering the adapter flanges 260, a sealed oil storage space can be formed in the second mounting cavity 211 to store lubricating medium, which is beneficial to the full use and effective sealing of the lubricating medium, thereby reducing the cost and prolonging the maintenance interval.

[0081] Specifically, the second box body 210 is provided with a second oil injection hole 215 communicating with the second installation cavity 211 at the second worm 230, and the user can inject lubricating medium into the second worm wheel 220 and the second worm 230 through the first oil injection hole 113 to ensure the stable operation of the pitch rotation mechanism 200. Wherein, the end of the second oil injection hole 215 away from the second installation cavity 211 is provided with a plugging member 300, so that after the user injects the lubricating medium, the oil storage space can be maintained in a sealed state to ensure the effective sealing of the lubricating medium.

[0082] In this embodiment, the horizontal rotation mechanism 100 and the pitch rotation mechanism 200 are independently lubricated in separate chambers and do not interfere with each other, which can ensure that the internal lubricating medium is fully utilized and effectively sealed, thereby reducing the cost and prolonging the maintenance-free time.

[0083] Preferably, the lubricating medium used by the horizontal rotation mechanism 100 and the pitch rotation mechanism 200 is preferably grease. Using grease lubrication can greatly save the amount of lubricating medium, further reduce the cost, and reduce material consumption.

[0084] In a specific embodiment, the adapter flange 260 is used to connect the main shaft and is directly locked to the second worm wheel 220. When the second worm 230 drives the second worm wheel 220 to rotate, the second worm wheel 220 will drive the adapter flange 260 to rotate, and then drive the main shaft connected to the adapter flange 260 to rotate, so as to change the pitch angle of the lens assembly.

[0085] Specifically, referring to FIG. 3, the second box body 210 includes a first sub-box body 212 and a second sub-box body 213, and the first sub-box body 212 and the second sub-box body 213 are sequentially distributed along the rotation axis of the second worm wheel 220. The second box body 210 adopts a split structure, which is more conducive to the user to assemble the structure and is convenient to install. Wherein, in order to ensure that the second installation cavity 211 has good sealing performance, the fifth sealing member 214 is arranged between the first sub-box body 212 and the second sub-box body 213.

[0086] As preferred, referring to FIG. 2 and FIG. 7, in all the above embodiments, the first worm wheel 120 and the first worm 130 adopt a double enveloping ring face worm drive structure. The double enveloping ring face worm drive structure refers to a device that applies a planar double enveloping curve to the ring worm wheel tooth profile setting and realizes transmission through the meshing of a multi-cutter ring worm on the ring worm wheel. The planar double enveloping curve refers to a moving point moving along a fixed curve in a plane while maintaining a vertical distance from the corresponding point on another fixed curve to the plane. The trajectory formed during this movement process is the planar double enveloping curve. The double enveloping ring face worm drive structure makes the gear transmission more stable due to the tooth profile satisfying the planar double enveloping curve, which can reduce noise and wear; in addition, it can also realize high-efficiency speed transformation and torque transmission, improve the control accuracy of the light-heat rotary driver, and control the control accuracy to be between 0.3-0.8 mrad; at the same time, the structure is compact, occupies small space, and is suitable for application scenarios with limited space; more importantly, due to the characteristics of the double enveloping curve, the double enveloping ring face worm drive structure has a bidirectional self-locking function, which can stably maintain the lens assembly at a certain position and prevent reverse rotation.

[0087] Correspondingly, the second worm wheel 220 and the second worm 230 preferably adopt a double enveloping ring face worm drive structure, which is more stable in transmission, can realize high-efficiency speed transformation and torque transmission, and improve the control accuracy of the light-heat rotary driver; at the same time, the structure is compact, occupies small space, and is suitable for application scenarios with limited space; more importantly, the double enveloping ring face worm drive structure has a bidirectional self-locking function, which can stably maintain the lens assembly at a certain position and prevent reverse rotation.

[0088] The parts involved in the above several embodiments are all standard products, and the core components are worm, worm wheel, box body, etc., which can effectively adapt to batch production and installation and reduce production cost.

[0089] The application adopts a general bearing design, adjusts the conventional installation mode of the bearing, that is, the first worm wheel 120 is provided with bearings on both upper and lower sides, the first box body 110 is in the form of a bearing seat as a whole, the stability is increased, the installation difficulty is reduced, and the quality stability is improved to a certain extent; in addition, in the initial installation state of the light-heat rotary driver, the first motor 140 and the second motor 240 are vertically distributed and installed, when the light-heat rotary driver is driven, one motor is static and the other motor is in a motion state, the unique structure can ensure that the driver has stronger anti-overturning capability; in the design process, the oil leakage risk of the light-heat rotary driver is fully considered, the sealing position of the horizontal rotary mechanism 100 is arranged upward, and the occurrence of oil leakage events is reduced as much as possible, and the structure is more reasonable. Moreover, the transmission structure of the light-heat rotary driver provided in the application is simple, stable, and has a precision that can be controlled between 0.3-0.8 mrad, can be mass-produced according to actual needs, and has strong practicality.

[0090] The application also provides a heliostat tracking system, which comprises a stand, a driver arranged at the top end of the stand, a main shaft in driving connection with the driver, and a lens assembly mounted on the main shaft. The driver is the light-heat rotary driver provided in any of the above embodiments, the first box body 110 thereof is fixedly connected to the top end of the stand, and the main shaft is in driving connection with the elevation rotary mechanism 200. At this time, the horizontal rotary mechanism 100 can be used to drive the elevation rotary mechanism 200, the main shaft and the lens assembly to rotate around the central axis of the stand, and the elevation rotary mechanism 200 can be used to drive the main shaft and the lens assembly to perform elevation movement. In this way, by controlling the operation of the horizontal rotary mechanism 100 and the elevation rotary mechanism 200, the lens assembly can be driven to generate electricity towards the molten salt tower, the control precision is high and the stability is good, and this is conducive to the long-term stable operation of the heliostat tracking system.

[0091] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0092] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the application, and it should be noted that for ordinary skilled persons in the art, without departing from the principle of the application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the application.

Claims

1. A photo-thermal rotary drive, characterized by Comprise: horizontal rotation mechanism and pitch rotation mechanism; The horizontal rotation mechanism comprises a first box, a first worm wheel and a first worm, a first installation cavity with a first opening is formed in the first box, the first worm wheel and the first worm are installed in the first installation cavity, and the first worm wheel and the first worm are connected; The pitch rotation mechanism comprises a second box, a second worm wheel and a second worm, the second box is installed at the first opening and fixedly connected with the first worm wheel, and a second installation cavity for installing the second worm wheel and the second worm is formed in the second box, and the second worm wheel and the second worm are connected; when the first worm drives the first worm wheel to rotate, the first worm wheel drives the pitch rotation mechanism to rotate; Wherein, the first worm and the second worm are horizontally placed, and the first worm and the second worm are vertically arranged when the horizontal rotation mechanism and the pitch rotation mechanism are in the initial installation state.

2. The photothermal rotary driver according to claim 1, wherein, the side of the first installation cavity away from the first opening extends to the direction of the first opening with an annular boss, the annular boss is arranged in the first worm wheel, a first bearing is further arranged outside the annular boss, and the first bearing is located between the annular boss and the first worm wheel in the radial direction; and both ends of the second worm wheel extend to both sides with rotary shafts respectively, two second bearings are arranged in the second installation cavity, and the two second bearings are arranged on the rotary shafts on the axial sides of the second worm wheel.

3. The photothermal rotary driver according to claim 2, wherein, the number of the first bearings is two, the two first bearings are arranged on the axial sides of the first worm wheel respectively, and a third sealing member is further arranged between the two first bearings.

4. The photothermal rotary driver according to claim 3, wherein, a first sealing member is arranged between the edge of the first opening and the first worm wheel, and a second sealing member is arranged between the annular boss and the first worm wheel.

5. The photothermal rotary driver according to claim 4, wherein, one end of the annular boss towards the first opening is movably connected with a pressing member, the pressing member has a pressing edge for pressing the first bearing, and the second sealing member is located between the pressing edge and the first worm wheel.

6. The photothermal rotary driver according to claim 1, wherein, when the horizontal rotation mechanism is in the initial installation state, the first opening of the first box faces upwards.

7. The photothermal rotary driver according to claim 1, wherein, the horizontal rotation mechanism further comprises a first motor, the power output shaft of the first motor is drivingly connected with the first worm; and the pitch rotation mechanism further comprises a second motor, the power output shaft of the second motor is drivingly connected with the second worm; when the horizontal rotation mechanism and the pitch rotation mechanism are in the initial installation state, the first motor and the second motor are vertically arranged. ​ 8. The photo-thermal rotary driver according to claim 2, characterized in that, the second box is provided with second openings at both ends in the direction of the second worm gear rotary shaft, and both of the second openings are covered with adapter flanges; both of the adapter flanges are fixedly connected with the rotary shafts on both sides of the second worm gear axially, clamping the second worm gear and the second bearing in the second installation cavity, and a fourth sealing member is arranged between the edge of the second opening and the adapter flange.

9. The photo-thermal rotary driver according to claim 1, characterized in that, the first box is provided with a first oil injection hole at the first worm, which is communicated with the first installation cavity, and the end of the first oil injection hole away from the first installation cavity is provided with a plugging member; and the second box is provided with a second oil injection hole at the second worm, which is communicated with the second installation cavity, and the end of the second oil injection hole away from the second installation cavity is provided with a plugging member.

10. A heliostat tracking system characterized by, comprising: a column, a driver arranged at the top end of the column, a main shaft drivenly connected with the driver, and a lens assembly mounted on the main shaft; wherein the driver is the photo-thermal rotary driver according to any one of claims 1-9, the first box is fixedly connected to the top end of the column, and the main shaft is drivingly connected with the pitch rotary mechanism; the horizontal rotary mechanism is used to drive the pitch rotary mechanism, the main shaft and the lens assembly to rotate around the central axis of the column, and the pitch rotary mechanism is used to drive the main shaft and the lens assembly to perform pitch movement.

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