Dust removing device for heliostat

Abstract

The utility model provides a heliostat excitation dust removal device relates to the field of solar energy photo -thermal power generation, specifically apply to the dust removal operation of heliostat, the device adopts the mechanical drive structure of wind energy drive, the device is installed on the back frame of heliostat, including vertical shaft fan, gear accelerator, eccentric mass, vertical shaft fan is connected with gear accelerator input shaft through the shaft coupling, gear accelerator accelerates the low -speed power of fan input, and its output shaft will produce high -speed power transmission to eccentric mass, and the periodic centrifugal force of eccentric mass because high -speed rotation drives the regular vibration of heliostat frame with high frequency, low amplitude, makes dust separate from mirror surface under the inertia effect. The utility model realizes the independent dust removal of heliostat without external energy, effectively maintains the optical performance of heliostat, improves heliostat condensing efficiency, supports the stable operation of solar energy photo -thermal power generation process, improves the energy conversion efficiency and operating stability of photo -thermal energy storage system.

Description

Technical Field

[0001] This utility model relates to the fields of solar thermal power generation and solar thermal energy storage, and in particular to a heliostat-excited dust removal device. Background Technology

[0002] In solar thermal power generation systems, heliostats are the core components for concentrating sunlight and collecting heat. They transfer energy to the heat-absorbing device by precisely reflecting sunlight, thereby driving the solar thermal power generation process. However, heliostats are usually deployed in open outdoor areas and are exposed to complex environments such as wind, sand, and dust for a long time. Dust easily accumulates on the mirror surface, which leads to a significant reduction in solar reflectivity and consequently a decrease in the energy conversion efficiency of the solar thermal energy storage system.

[0003] Currently, the dust removal methods for heliostats are mainly divided into two categories: manual cleaning and electric dust removal. The former requires a lot of labor costs and has low cleaning efficiency; the latter increases system energy consumption due to reliance on external power supply, and also has a series of practical problems such as difficulty in outdoor wiring and electrical components being susceptible to failure due to weather conditions.

[0004] Therefore, this application proposes a dust removal device that enables heliostats to remove dust autonomously without external power, solving the problems of high cost and difficulty in cleaning heliostats outdoors.

[0005] Reduce operation and maintenance costs, enhance the operational stability of solar thermal power generation systems, and improve the energy conversion efficiency of solar thermal energy storage systems. Utility Model Content

[0006] This invention provides a heliostat-excited dust removal device, which solves a series of problems in tower molten salt power plants caused by dust accumulation on heliostats, including increased operation and maintenance costs, weakened system stability, and reduced energy conversion efficiency.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A heliostat-excited dust removal device includes a vertical axis fan, a gear accelerator, and an eccentric mass block; The vertical axis fan includes lift-type blades, drag-type blades, and a fan shaft; the drag-type blades are welded and fixed to the fan shaft, and the fan shaft is rotatably connected to the lift-type blades; the fan shaft is connected to a gear accelerator via a coupling. The gear accelerator includes an input shaft, an intermediate shaft, an output shaft, a gear assembly, a housing, and lubrication seals; the gear assembly includes a first-stage cylindrical spur drive gear, a first-stage cylindrical spur driven gear, a second-stage cylindrical spur drive gear, and a second-stage cylindrical spur driven gear. The first-stage cylindrical spur gear is connected to the input shaft via a key; the second-stage cylindrical spur gear is connected to the intermediate shaft via a key; the second-stage cylindrical spur gear is connected to the output shaft via an interference fit; the first-stage cylindrical spur gear and the first-stage cylindrical spur gear are connected via gear meshing; the second-stage cylindrical spur gear and the second-stage cylindrical spur gear are connected via gear meshing. The eccentric mass block is connected to the heliostat.

[0008] Furthermore, the housing includes an upper cover and a lower housing; the upper cover and the lower housing are fastened together by bolts, and the intermediate shaft and the input shaft are both connected to the housing through bearings.

[0009] Furthermore, the input shaft of the gear accelerator is connected to the fan shaft via a coupling.

[0010] Furthermore, the end of the output shaft is connected to the eccentric mass block via a key.

[0011] Furthermore, the lift-type blade is a Φ-type Darius blade; the drag-type blade is a Sabine blade.

[0012] Furthermore, the lubricating seal includes gear oil inside the housing, a lip seal at the shaft extension, and a sealing gasket at the housing mating surface.

[0013] The beneficial effects of this utility model are as follows: This invention uses wind power to drive mechanical transmission and centrifugal force to drive the heliostat to vibrate and remove dust. The entire process does not rely on electricity. Compared with traditional electrically driven dust removal devices, it does not need to be connected to the power supply line of the power station to get rid of wiring restrictions, and it also avoids the additional energy consumption costs caused by electricity consumption. Moreover, since there are no electrical components, electrical faults such as short circuits and component burnout can be directly avoided.

[0014] This invention maintains the high reflectivity of the heliostat through continuous and reliable dust removal, ensuring a stable supply of heat energy from the heliostat array to the receiver, guaranteeing the energy replenishment rate and capacity utilization of the energy storage tank, improving the energy conversion efficiency of the energy storage system, enhancing the stability of the power generation efficiency of the solar thermal power generation system, and reducing energy loss caused by dust accumulation.

[0015] This invention relies on natural wind power, meets the requirements of green operation, and is suitable for solar thermal power plant scenarios in remote areas without grid coverage; moreover, it eliminates the need for regular cleaning with manpower and resources, reducing operation and maintenance costs and improving economic efficiency. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is the front view of the dust removal device of this utility model.

[0018] Figure 2 This is a top view of the dust removal device of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the gear accelerator in this utility model. Figure 1 .

[0020] Figure 4 This is a schematic diagram of the internal structure of the gear accelerator in this utility model. Figure 2 Explanation of icon numbers: 1. Eccentric mass block; 2. Gear accelerator; 3. Coupling; 4. Lifting blade; 5. Resistance blade; 6. Input shaft; 7. Intermediate shaft; 8. Output shaft; 9. Housing; 10. First-stage cylindrical spur gear driving gear; 11. First-stage cylindrical spur gear driven gear; 12. Second-stage cylindrical spur gear driving gear; 13. Second-stage cylindrical spur gear driven gear. Detailed Implementation

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0027] This utility model provides a technical solution: a heliostat excitation dust removal device, including a vertical axis fan, a gear accelerator 2, and an eccentric mass block 1.

[0028] The vertical axis fan includes lift blades 4, drag blades 5, and a fan shaft. The drag blades 5 are fixedly connected to the fan shaft by welding, while the lift blades 4 are rotatably connected to the fan shaft. The fan shaft is connected to the input shaft 6 of the gear accelerator 2 via a coupling 3. When natural wind blows, the drag blades 5 first capture wind energy to drive the fan to rotate, which in turn drives the lift blades 4 to rotate. As the wind speed increases, the lift blades 4 further accelerate the fan speed, thereby transmitting the rotation of the fan shaft to the input shaft 6 of the gear accelerator 2.

[0029] The gear accelerator 2 includes an input shaft 6, an intermediate shaft 7, an output shaft 8, a gear assembly, a housing 9, and lubrication seals. The gear assembly includes a first-stage cylindrical spur drive gear 10, a first-stage cylindrical spur driven gear 11, a second-stage cylindrical spur drive gear 12, and a second-stage cylindrical spur driven gear 13. The first-stage cylindrical spur drive gear 10 is connected to the input shaft 6 via a key. The second-stage cylindrical spur drive gear 10 is connected to the intermediate shaft 7 via a key. The second-stage cylindrical spur driven gear 13 is connected to the output shaft 8 via an interference fit. The first-stage cylindrical spur drive gear 10 and the first-stage cylindrical spur driven gear 11 are connected by gear meshing. The second-stage cylindrical spur drive gear 12 and the second-stage cylindrical spur driven gear 13 are connected by gear meshing. The second-stage cylindrical spur drive gear 12 and the first-stage cylindrical spur driven gear 11 are connected by gear meshing. The housing 9 includes an upper cover and a lower housing; the upper cover and the lower housing are fastened together by bolts; the lubrication and sealing components include gear oil inside the housing 9, a lip seal at the shaft extension, and a sealing gasket on the mating surface of the housing 9; the input shaft 6 is connected to the fan shaft through a coupling 3; the intermediate shaft 7 and the input shaft 6 are both connected to the housing 9 through bearings; the end of the output shaft 8 is connected to the eccentric mass block 1 through a key.

[0030] The gear accelerator 2 accelerates the low-speed power input from the fan through a two-stage gear transmission, and its output shaft 8 transmits the generated high-speed power to the eccentric mass block 1 via a key connection. The periodic centrifugal force generated by the high-speed rotation of the eccentric mass block 1 drives the heliostat frame to vibrate regularly at a high frequency and low amplitude, causing dust to detach from the mirror surface under inertia.

[0031] This invention enables heliostats to perform autonomous dust removal without external power, effectively maintaining their optical performance, improving their light-gathering efficiency, reducing system operation and maintenance costs, supporting the stable operation of solar thermal power generation processes, and enhancing the energy conversion efficiency and operational stability of solar thermal energy storage systems.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heliostat-excited dust removal device, characterized in that, Includes a vertical axis fan, a gear accelerator (2), and an eccentric mass block (1); The vertical axis fan includes lift blades (4), drag blades (5), and a fan shaft; the drag blades (5) are welded and fixed to the fan shaft, and the fan shaft is rotatably connected to the lift blades (4); the fan shaft is connected to a gear accelerator (2) via a coupling (3). The gear accelerator (2) includes an input shaft (6), an intermediate shaft (7), an output shaft (8), a gear assembly, a housing (9), and a lubrication seal; the gear assembly includes a first-stage cylindrical spur gear (10), a first-stage cylindrical spur gear (11), a second-stage cylindrical spur gear, and a second-stage cylindrical spur gear (13). The first-stage cylindrical spur gear (10) is connected to the input shaft (6) via a key; the second-stage cylindrical spur gear is connected to the intermediate shaft (7) via a key; the second-stage cylindrical spur gear (13) is connected to the output shaft (8) via an interference fit; the first-stage cylindrical spur gear (10) and the first-stage cylindrical spur gear (11) are connected via gear meshing; the second-stage cylindrical spur gear and the second-stage cylindrical spur gear (13) are connected via gear meshing. The eccentric mass block (1) is connected to the heliostat.

2. The heliostat vibration dust removal device according to claim 1, characterized in that, The housing (9) includes an upper cover and a lower housing; the upper cover and the lower housing are fastened together by bolts, and the intermediate shaft (7) and the input shaft (6) are both connected to the housing (9) by bearings.

3. The heliostat vibration dust removal device according to claim 1, characterized in that, The input shaft (6) of the gear accelerator (2) is connected to the fan shaft via a coupling (3).

4. The heliostat vibration dust removal device according to claim 1, characterized in that, The output shaft (8) is connected to the eccentric mass block (1) by a key at its end.

5. The heliostat vibration dust removal device according to claim 1, characterized in that, The lifting blade (4) is a Φ-type Darius blade; the drag blade (5) is a Sabine blade.

6. The heliostat excitation dust removal device according to claim 1, characterized in that, The lubricating seals include gear oil inside the housing (9), a lip seal at the shaft extension, and a sealing gasket on the mating surface of the housing (9).

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