Energy-saving electric push rod for solar photo-thermal power generation

Abstract

The invention discloses an energy-saving electric push rod for solar photo-thermal power generation, which comprises a push rod main assembly, an automatic lubricating assembly and an automatic cooling assembly, and is characterized in that the push rod main assembly is composed of a driving motor, a multi-stage gear set, a transmission case, a ball screw, a screw nut, a connecting rod and a sleeve; the multi-stage gear set is used for completing heliostat tracking driving in a solar photo-thermal power generation system and is rotationally connected between the inner walls of the transmission case. Through the linkage design of the oil pumping mechanism and the pushing mechanism, the piston rod is driven by the reciprocating motion of the lead screw nut to automatically supplement lubricating oil to the elastic liquid storage bag, when the pressure in the liquid storage bag reaches a preset value, the pressure valve is automatically opened, oil is synchronously and accurately supplied to the ball screw and the multi-stage gear set through the double lubricating pipelines, and the working efficiency is improved. And external power driving is not needed, and a self-lubricating mode of supplying while running is achieved.

Description

Technical Field

[0001] This invention relates to the field of solar thermal power generation equipment technology, and in particular to an energy-saving electric actuator for solar thermal power generation. Background Technology

[0002] In solar thermal power generation systems, the precise tracking drive of heliostats is the core component ensuring high photothermal conversion efficiency. The electric actuator, as a key component of the heliostat tracking system, directly impacts the overall performance of the entire power generation system through its operational stability, reliability, and energy efficiency. Solar thermal power generation projects are often deployed in open areas such as deserts and plateaus, environments characterized by extreme climates: large diurnal temperature variations, with daytime surface temperatures often exceeding 40°C, causing the drive motor to operate under prolonged high temperatures; frequent sandstorms and dust storms exacerbate wear on mechanical transmission components; and the long-term unattended outdoor operation mode places stringent demands on the equipment's autonomous maintenance capabilities and long-term service life.

[0003] Existing electric linear actuators, when applied to solar thermal power generation systems, have gradually revealed several compatibility defects: First, the transmission system lacks an effective self-lubrication mechanism. During long-term operation, the lubricating oil in the ball screw and multi-stage gear set is prone to evaporation due to high temperatures and dust contamination, leading to accelerated component wear. This not only reduces transmission efficiency and increases energy consumption but also shortens the equipment's lifespan. Regular manual inspection and lubrication are required, resulting in high maintenance costs and difficulty meeting the needs of unattended outdoor operation. Second, the heat dissipation design of the drive motor is difficult to adapt to extreme high-temperature environments. Traditional natural heat dissipation methods are inefficient, and prolonged high-temperature operation of the motor can easily lead to thermal overload, which not only reduces the motor's output power and control accuracy but can also cause the motor to burn out in severe cases, affecting the continuity of heliostat tracking. Third, the lubrication of some electric linear actuators relies on external power, which increases system energy consumption and contradicts the energy-saving concept of solar thermal power generation. At the same time, traditional cooling methods are mostly single air-cooling modes, which cannot flexibly adjust the cooling intensity according to the actual temperature of the motor, resulting in limited cooling effect and serious energy waste. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an energy-saving electric actuator for solar thermal power generation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An energy-saving electric actuator for solar thermal power generation includes a main actuator assembly, an automatic lubrication assembly, and an automatic cooling assembly. The main actuator assembly consists of a drive motor, a multi-stage gear set, a transmission box, a ball screw, a screw nut, a connecting rod, and a sleeve. It is used to complete the tracking drive of the heliostat in the solar thermal power generation system. The multi-stage gear set is rotatably connected to the inner wall of the transmission box. The output shaft of the drive motor is coaxially and fixedly connected to the input end of the multi-stage gear set. The ball screw is coaxially and fixedly connected to the output end of the multi-stage gear set. The screw nut is threadedly connected to the ball screw and fixedly connected to the connecting rod. The sleeve is sleeved on the outside of the ball screw and has slots at both the upper and lower ends. The automatic lubrication assembly consists of an elastic reservoir, a liquid three-way valve, a pressure valve, a first lubrication pipe, and a second lubrication pipe. It is used to automatically spray lubricating oil onto the ball screw and multi-stage gear set after a fixed number of uses. The bottom of the elastic reservoir is fixed to the side wall of the sleeve. The pressure valve is connected between the elastic reservoir and the lower end of the liquid three-way valve. The ball screw nut has a lubricating oil groove, and its upper end is fixedly connected to an oil guide that communicates with the lubrication groove. The first lubrication pipe is connected between one side of the liquid three-way valve and the oil guide. The second lubrication pipe is connected between the other side of the liquid three-way valve and the upper end of the transmission box. The lower end of the transmission box is fixedly connected to a vertical plate, and a pumping mechanism for pumping lubricating oil into the elastic reservoir is installed at the lower end of the vertical plate. The automatic cooling component consists of a temperature sensor and a fan, and is used to automatically ventilate and cool the drive motor when it overheats. The temperature sensor is fixedly installed on the drive motor housing, and the fan is fixedly installed on the side wall of the upright plate, with its air outlet connected to the inside of the drive motor housing through a pipe.

[0006] Preferably, the oil pumping mechanism includes an oil reservoir, a pumping cylinder, a piston rod, an oil inlet pipe, and an oil outlet pipe. The oil reservoir is horizontally fixed to the lower side wall of the vertical plate, and the pumping cylinder is vertically fixed to the bottom of the vertical plate. The lower end of the piston rod is slidably and sealingly connected to the inner wall of the pumping cylinder. The oil inlet pipe is connected between the pumping cylinder and the oil reservoir, and the oil outlet pipe is connected between the pumping cylinder and the elastic liquid reservoir. A sliding groove is provided on the vertical plate, and a pushing mechanism for pushing the piston rod to reciprocate vertically is installed in the sliding groove.

[0007] Preferably, the pushing mechanism includes a slider and a connecting rod. The slider is slidably connected in a groove and fixedly connected to the upper end of the piston rod. One end of the connecting rod is rotatably connected to the slider, and the other end is rotatably connected to the lead screw nut.

[0008] Preferably, the oil inlet pipe is equipped with a one-way valve that allows liquid to flow only from the oil reservoir to the pump cylinder, and the oil outlet pipe is equipped with a one-way valve that allows liquid to flow only from the pump cylinder to the elastic reservoir.

[0009] Preferably, the end of the oil guide away from the lead screw nut is provided with a detachable filter connector for filtering impurities in the lubricating oil.

[0010] Preferably, a wear-resistant pad is provided on the contact surface between the slider and the groove, and the pad is detachably connected to the slider.

[0011] Preferably, a temperature-dividing chamber is fixedly installed on the side wall of the sleeve, and a gas three-way valve is provided below the temperature-dividing chamber. The air outlet pipe of the fan is replaced with a guide pipe, which is connected to the lower end of the gas three-way valve. One side of the gas three-way valve is connected to the hot end of the temperature-dividing chamber through a hot end air inlet pipe, and the other side of the gas three-way valve is connected to the cold end of the temperature-dividing chamber through a cold end air inlet pipe. A first magnetic control valve is installed on the cold end air inlet pipe, and a second magnetic control valve is installed on the hot end air inlet pipe. The cold end of the temperature-dividing chamber is connected to the inside of the drive motor housing through a cold end air outlet pipe, and the hot end of the temperature-dividing chamber is connected to the inside of the drive motor housing through a hot end air outlet pipe. A heat-dividing mechanism for dividing the temperature-dividing chamber into hot and cold ends is installed inside the temperature-dividing chamber.

[0012] Preferably, the heat distribution mechanism includes a dual-material semiconductor sheet, which is fixedly installed in the middle of the inner wall of the temperature distribution chamber, dividing the temperature distribution chamber into two sealed areas. The dual-material semiconductor sheet uses different semiconductor materials on both sides and is in contact with the two areas respectively.

[0013] Preferably, the inner walls of both the hot and cold ends of the temperature distribution box are provided with heat insulation layers, and the heat insulation layers are attached and fixed to the inner walls of the temperature distribution box.

[0014] The present invention has the following beneficial effects: 1. This invention utilizes a linkage design between the oil pump mechanism and the push mechanism. The reciprocating motion of the lead screw and nut drives the piston rod to automatically replenish lubricating oil to the elastic reservoir. When the pressure inside the reservoir reaches a preset value, the pressure valve automatically opens, simultaneously and precisely supplying oil to the ball screw and multi-stage gear set via dual lubrication pipelines. This design requires no external power drive, achieving an autonomous lubrication mode that replenishes oil during operation. It effectively solves the problems of inconvenient manual lubrication in outdoor environments and lubricating oil failure caused by sand and dust pollution. It significantly reduces wear on transmission components, improves transmission efficiency and equipment lifespan, and lowers maintenance costs.

[0015] 2. The automatic cooling component of this invention monitors the temperature of the drive motor housing in real time through a temperature sensor, realizing intelligent identification and response to cooling needs. When the motor temperature reaches a preset threshold, the fan starts to quickly deliver airflow into the motor. Compared with traditional natural heat dissipation or fixed air cooling mode, this design can promptly block the trend of motor thermal overload, avoid problems such as output power attenuation and control accuracy reduction caused by high temperature, ensure the stability and continuity of heliostat tracking drive, and perfectly adapt to the extreme high temperature environment such as deserts and plateaus where solar thermal power generation systems are located.

[0016] 3. The combined design of the temperature-controlled chamber and the dual-material semiconductor chip in this invention precisely divides the temperature-controlled chamber into independent hot and cold ends. Combined with the intelligent control of the first and second magnetic control valves, the cooling mode can be flexibly switched according to the actual temperature of the motor. When the motor overheats, the cold end air inlet pipe is opened to deliver cold air to the motor for rapid cooling. When the temperature is too low at night, the hot end air inlet pipe is opened to deliver warm air to the motor, avoiding problems such as increased viscosity of the internal lubricating oil due to low temperatures. This design ensures the normal operation of the drive motor according to different temperature scenarios, while minimizing the energy consumption of the temperature control system, aligning with the energy-saving concept of solar thermal power generation, and improving the overall energy utilization efficiency of the electric actuator. Attached Figure Description

[0017] Figure 1 This is a front structural schematic diagram of an energy-saving electric actuator for solar thermal power generation proposed in this invention. Figure 2 This is a schematic diagram of the transmission box and multi-stage gear set structure proposed in this invention; Figure 3 This is a schematic diagram of the internal structure of the sleeve proposed in this invention; Figure 4 This is a schematic diagram of the structure of the actuation mechanism proposed in this invention; Figure 5 This is a schematic diagram showing the connection between the oil pump mechanism and the automatic lubrication assembly proposed in this invention; Figure 6 This is a schematic diagram of the automatic lubrication assembly structure proposed in this invention; Figure 7 This is a schematic diagram of the back structure of an energy-saving electric actuator for solar thermal power generation proposed in this invention; Figure 8 This is a schematic diagram of the temperature distribution chamber and temperature distribution mechanism proposed in this invention.

[0018] In the diagram: 1. Drive motor; 2. Transmission box; 3. Sleeve; 4. Connecting rod; 5. Vertical plate; 6. Connecting rod; 7. Piston rod; 8. Pump cylinder; 9. Oil inlet pipe; 10. Oil outlet pipe; 11. Oil reservoir; 12. Elastic liquid reservoir; 13. Liquid three-way valve; 14. Slide groove; 15. Multi-stage gear set; 16. Ball screw; 17. Screw nut; 18. Slider; 19. Strip groove; 20. Pressure valve; 21. First lubrication pipe; 22. Oil guide; 23. Second lubrication pipe; 24. Fan; 25. Temperature sensor; 26. Gas three-way valve; 27. Air duct; 28. Temperature chamber; 29. ​​Cold end air inlet pipe; 30. First magnetic control valve; 31. Hot end air inlet pipe; 32. Second magnetic control valve; 33. Dual-material semiconductor chip; 34. Cold end air outlet pipe; 35. Hot end air outlet pipe. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1 Reference Figure 1-6 An energy-saving electric push rod for solar thermal power generation includes a main push rod assembly and an automatic lubrication assembly. The main push rod assembly consists of a drive motor 1, a multi-stage gear set 15, a transmission box 2, a ball screw 16, a screw nut 17, a connecting rod 4, and a sleeve 3. It is used to complete the tracking drive of the heliostat in the solar thermal power generation system. The multi-stage gear set 15 is rotatably connected to the inner wall of the transmission box 2. The output shaft of the drive motor 1 is coaxially and fixedly connected to the input end of the multi-stage gear set 15. The ball screw 16 is coaxially and fixedly connected to the output end of the multi-stage gear set 15. The screw nut 17 is threadedly connected to the ball screw 16 and fixedly connected to the connecting rod 4. The sleeve 3 is sleeved on the outside of the ball screw 16 and has strip grooves 19 at both the upper and lower ends. The automatic lubrication assembly consists of an elastic reservoir 12, a liquid three-way valve 13, a pressure valve 20, a first lubrication pipe 21, and a second lubrication pipe 23. It is used to automatically spray lubricating oil onto the ball screw 16 and the multi-stage gear set 15 after a fixed number of uses. The bottom of the elastic reservoir 12 is fixed to the side wall of the sleeve 3. The pressure valve 20 is connected between the elastic reservoir 12 and the lower end of the liquid three-way valve 13. The screw nut 17 has a lubricating oil groove, and its upper end is fixedly connected to an oil guide 22 that communicates with the lubrication groove. The first lubrication pipe 21 is connected between one side of the liquid three-way valve 13 and the oil guide 22. The second lubrication pipe 23 is connected between the other side of the liquid three-way valve 13 and the upper inclined end of the transmission box 2. The lower end of the transmission box 2 is fixedly connected to a vertical plate 5, and a pumping mechanism for pumping lubricating oil into the elastic reservoir 12 is installed at the lower end of the vertical plate 5.

[0021] The oil pumping mechanism includes an oil reservoir 11, an oil pumping cylinder 8, a piston rod 7, an oil inlet pipe 9, and an oil outlet pipe 10. The oil reservoir 11 is horizontally fixed to the lower side wall of the vertical plate 5, the oil pumping cylinder 8 is vertically fixed to the bottom of the vertical plate 5, the lower end of the piston rod 7 is sealed and slidably connected to the inner wall of the oil pumping cylinder 8, the oil inlet pipe 9 is connected between the oil pumping cylinder 8 and the oil reservoir 11, and the oil outlet pipe 10 is connected between the oil pumping cylinder 8 and the elastic liquid storage bladder 12. A sliding groove 14 is provided on the vertical plate 5, and a pushing mechanism for pushing the piston rod 7 to reciprocate vertically is installed in the sliding groove 14.

[0022] The pushing mechanism includes a slider 18 and a connecting rod 6. The slider 18 is slidably connected in the groove 14 and fixedly connected to the upper end of the piston rod 7. One end of the connecting rod 6 is rotatably connected to the slider 18, and the other end is rotatably connected to the lead screw nut 17.

[0023] The inlet pipe 9 is equipped with a one-way valve that allows liquid to flow only from the oil reservoir 11 to the pump cylinder 8, and the outlet pipe 10 is equipped with a one-way valve that allows liquid to flow only from the pump cylinder 8 to the elastic reservoir 12.

[0024] The end of the oil guide 22 away from the lead screw nut 17 is provided with a detachable filter connector for filtering impurities in the lubricating oil. The contact surface between the slider 18 and the slide groove 14 is provided with a wear-resistant gasket, and the gasket is detachably connected to the slider 18.

[0025] In this embodiment, when the solar thermal power generation system needs the heliostat to track the sun's position, the drive motor 1 starts, and its output shaft drives the multi-stage gear set 15 in the transmission box 2 to rotate. After gear transmission and deceleration, it drives the ball screw 16 to rotate synchronously. Since the screw nut 17 is threadedly connected to the ball screw 16 and connected to the heliostat actuator through the connecting rod 4, the rotational motion of the ball screw 16 is converted into the reciprocating linear motion of the screw nut 17 along the axial direction of the ball screw 16. This motion, in turn, drives the heliostat to complete the precise tracking action through the connecting rod 4. The sleeve 3 provides protection for the ball screw 16, and the strip grooves 19 at its upper and lower ends provide movement space for the connection between the screw nut 17 and the connecting rod 4, thus avoiding interference.

[0026] During the operation of the push rod main assembly, the reciprocating motion of the lead screw nut 17 drives the slider 18 to reciprocate vertically along the slide groove 14 on the vertical plate 5 via the connecting rod 6. The piston rod 7, which is fixedly connected to the slider 18, then slides reciprocally in the oil pump cylinder 8. When the piston rod 7 moves upward, a negative pressure is formed in the oil pump cylinder 8. Under the action of the air pressure difference, the lubricating oil in the oil reservoir 11 opens the one-way valve on the oil inlet pipe 9 and flows into the oil pump cylinder 8. When the piston rod 7 moves downward, the pressure in the oil pump cylinder 8 increases, and the lubricating oil opens the one-way valve on the oil outlet pipe 10 and is pumped into the elastic reservoir 12 through the oil outlet pipe 10, realizing the automatic replenishment of lubricating oil.

[0027] As the push rod reciprocates more times, the lubricating oil in the elastic reservoir 12 accumulates continuously. When the pressure inside the reservoir reaches the preset threshold of the pressure valve 20, the pressure valve 20 automatically opens, and the lubricating oil is diverted to the first lubrication pipe 21 and the second lubrication pipe 23 via the liquid three-way valve 13.

[0028] The lubricating oil in the first lubrication pipe 21 enters the lubrication groove in the lead screw nut 17 through the oil guide 22 and is evenly coated on the thread surface of the ball screw 16; the lubricating oil in the second lubrication pipe 23 is injected into the transmission box 2 to lubricate the meshing parts of the multi-stage gear set 15, effectively reducing the frictional loss of the transmission components.

[0029] The detachable filter connector at the end of the oil guide 22 can filter out impurities in the lubricating oil, preventing impurities from entering the transmission contact surface and causing wear. The detachable filter connector is convenient for regular cleaning or replacement. The wear-resistant pad on the contact surface between the slider 18 and the groove 14 can reduce wear when the two move relative to each other and extend the service life of the components. At the same time, the detachable design of the pad facilitates subsequent maintenance and replacement.

[0030] The entire automatic lubrication process requires no external power and relies entirely on the movement of the push rod itself. This meets the unattended operation requirements of outdoor solar thermal power generation systems, significantly reducing maintenance costs while improving the transmission efficiency and operational stability of the electric push rod.

[0031] Example 2 Reference Figure 7 An energy-saving electric actuator for solar thermal power generation, which differs from Embodiment 1 in that it also includes an automatic cooling component. The automatic cooling component consists of a temperature sensor 25 and a fan 24, which is used to automatically ventilate and cool the drive motor 1 when it overheats. The temperature sensor 25 is fixedly installed on the housing of the drive motor 1, and the fan 24 is fixedly installed on the side wall of the upright plate 5, and its air outlet is connected to the inside of the housing of the drive motor 1 through a pipe.

[0032] In this embodiment, when the solar thermal power generation system is running, the drive motor 1 is prone to generating a large amount of heat due to being in a high-temperature environment such as desert or plateau for a long time and continuously providing power for heliostat tracking.

[0033] A temperature sensor 25, fixedly mounted on the housing of the drive motor 1, monitors the housing temperature in real time and feeds the temperature data back to the control system. When the temperature sensor 25 detects that the temperature of the drive motor 1 reaches a preset overheat threshold, the control system immediately triggers the automatic cooling component to start. The fan 24 begins to operate, generating airflow, which is directly delivered to the interior of the drive motor 1 housing through a pipe connected to the outlet of the fan 24. The airflow circulates within the motor housing, quickly removing the heat generated during the operation of the drive motor 1, achieving targeted ventilation and cooling. This prevents the drive motor 1 from experiencing a decrease in output power, reduced control accuracy, or even burnout due to overheating, ensuring the continuity and stability of the heliostat tracking drive.

[0034] When the temperature sensor 25 detects that the temperature of the drive motor 1 has dropped to within a safe threshold range, the control system controls the fan 24 to stop operating, eliminating the need for continuous heat dissipation and reducing unnecessary energy consumption, which aligns with the energy-saving concept of solar thermal power generation. The entire cooling process requires no manual intervention and is fully automatic, making it suitable for unattended outdoor operation scenarios and effectively improving the adaptability and reliability of the electric actuator in extreme high-temperature environments.

[0035] Example 3 Reference Figure 7 and Figure 8 The difference from embodiments 1 and 2 is that a temperature distribution box 28 is fixedly installed on the side wall of the sleeve 3, and a gas three-way valve 26 is provided below the temperature distribution box 28. The air outlet pipe of the fan 24 is replaced with a guide pipe 27, which is connected to the lower end of the gas three-way valve 26. One side of the gas three-way valve 26 is connected to the hot end of the temperature distribution box 28 through the hot end air inlet pipe 31, and the other side of the gas three-way valve 26 is connected to the cold end of the temperature distribution box 28 through the cold end air inlet pipe 29. A first magnetic control valve 30 is installed on the cold end air inlet pipe 29, and a second magnetic control valve 32 is installed on the hot end air inlet pipe 31. The cold end of the temperature distribution box 28 is connected to the inside of the drive motor 1 housing through the cold end air outlet pipe 34, and the hot end of the temperature distribution box 28 is connected to the inside of the drive motor 1 housing through the hot end air outlet pipe 35. A heat distribution mechanism for dividing it into hot and cold ends is installed inside the temperature distribution box 28.

[0036] The heat distribution mechanism includes a dual-material semiconductor plate 33, which is fixedly installed in the middle of the inner wall of the temperature distribution chamber 28, dividing the temperature distribution chamber 28 into two sealed areas. The two sides of the dual-material semiconductor plate 33 are made of different semiconductor materials and are in contact with the two areas respectively.

[0037] The inner walls of both the hot and cold ends of the temperature chamber 28 are provided with heat insulation layers, and the heat insulation layers are attached and fixed to the inner walls of the temperature chamber 28.

[0038] In this embodiment, when the solar thermal power generation system is running, the temperature of the drive motor 1 is monitored in real time by the temperature sensor 25 and fed back to the control system. While continuing the basic functions of Embodiment 2, the automatic cooling component achieves more precise and efficient temperature control through the collaborative design of the temperature distribution box 28 and the dual-material semiconductor chip 33.

[0039] The dual-material semiconductor chip 33 located in the middle of the inner wall of the temperature chamber 28 uses different semiconductor materials on its two sides. When energized, it can create a temperature difference effect, dividing the temperature chamber 28 into two independent sealed areas: a cold end and a hot end. The heat insulation layer that is attached and fixed to the inner wall of the cold and hot ends of the temperature chamber 28 can effectively reduce the heat transfer between the cold and hot ends, ensure the temperature stability of both ends, and avoid energy loss.

[0040] When the temperature sensor 25 detects that the temperature of the drive motor 1 is lower than the preset overheat threshold but needs to be kept constant, the control system controls the first magnetic valve 30 to close and the second magnetic valve 32 to open. At the same time, the fan 24 is started. The airflow enters the gas three-way valve 26 through the air duct 27 and flows into the hot end of the temperature distribution box 28 through the hot end air inlet pipe 31. After exchanging heat with the hot end area, it forms a suitable warm airflow, which is then delivered to the inside of the drive motor 1 housing through the hot end air outlet pipe 35. This avoids the motor temperature being too low and affecting the operating efficiency, and also reduces unnecessary energy consumption. When the temperature of the drive motor 1 is detected to reach or exceed the overheat threshold, the control system immediately switches the valve state, closes the second magnetic control valve 32, and opens the first magnetic control valve 30. The airflow generated by the fan 24 enters the cold end of the temperature chamber 28 through the air duct 27, the gas three-way valve 26 and the cold end air inlet pipe 29. Under the cooling effect of the dual-material semiconductor chip 33, the airflow is rapidly cooled to form cold air, which is then injected into the housing of the drive motor 1 through the cold end air outlet pipe 34 to achieve rapid and efficient cooling and prevent the motor from experiencing performance degradation or failure due to thermal overload.

[0041] Throughout the temperature control process, the gas three-way valve 26, in conjunction with the intelligent switching of the first magnetic control valve 30 and the second magnetic control valve 32, precisely controls the airflow direction. The temperature difference effect of the dual-material semiconductor chip 33 enables the on-demand preparation of hot and cold airflows, adapting to the cooling requirements of the motor under different temperature conditions in the extreme environment of solar thermal power generation. The heat insulation layer of the temperature distribution box 28 further improves the temperature control accuracy and reduces energy waste. At the same time, the entire cooling system is optimized and upgraded based on the existing structure of the push rod, without the need for additional complex drive components. While ensuring the stable operation of the drive motor 1, it maximizes the energy efficiency and adaptability of the cooling system, further strengthening the long-term reliable operation capability of the electric push rod in outdoor unattended scenarios.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An energy-saving electric linear actuator for solar thermal power generation, comprising a main actuator assembly, an automatic lubrication assembly, and an automatic cooling assembly, characterized in that: The push rod main assembly includes a drive motor (1), a multi-stage gear set (15), a transmission box (2), a ball screw (16), a screw nut (17), a connecting rod (4), and a sleeve (3). The multi-stage gear set (15) is rotatably connected to the inner wall of the transmission box (2). The output shaft of the drive motor (1) is coaxially fixed with the input end of the multi-stage gear set (15). The ball screw (16) is coaxially fixed with the output end of the multi-stage gear set (15). The screw nut (17) is threaded to the ball screw (16) and fixed to the connecting rod (4). The sleeve (3) is sleeved on the outside of the ball screw (16) and has strip grooves (19) at the upper and lower ends. The automatic lubrication assembly includes an elastic reservoir (12), a liquid three-way valve (13), a pressure valve (20), a first lubrication pipe (21), and a second lubrication pipe (23). The elastic reservoir (12) is fixed to the side wall of the sleeve (3) and is connected to the lower end of the liquid three-way valve (13) by the pressure valve (20). The screw nut (17) is provided with a lubricating oil groove and is fixed to the upper end with an oil guide (22). The first lubrication pipe (21) connects the liquid three-way valve (13) and the oil guide (22). The second lubrication pipe (23) connects the liquid three-way valve (13) and the transmission box (2). The lower end of the transmission box (2) is fixed to a vertical plate (5) and is provided with an oil pumping mechanism at its lower end. The automatic cooling component includes a temperature sensor (25) and a fan (24). The temperature sensor (25) is installed in the housing of the drive motor (1), and the fan (24) is installed on the side wall of the upright plate (5). Its air outlet is connected to the housing of the drive motor (1) through a pipe.

2. The energy-saving electric actuator for solar thermal power generation according to claim 1, characterized in that: The oil pumping mechanism includes an oil storage cylinder (11), an oil pump cylinder (8), a piston rod (7), an oil inlet pipe (9), and an oil outlet pipe (10). The oil storage cylinder (11) is horizontally fixedly connected to the lower side wall of the vertical plate (5). The oil pump cylinder (8) is vertically fixedly connected to the bottom end of the vertical plate (5). The lower end of the piston rod (7) is sealed and slidably connected to the inner wall of the oil pump cylinder (8). The oil inlet pipe (9) is connected between the oil pump cylinder (8) and the oil storage cylinder (11). The oil outlet pipe (10) is connected between the oil pump cylinder (8) and the elastic liquid storage bladder (12). A sliding groove (14) is provided on the vertical plate (5). A pushing mechanism for pushing the piston rod (7) to reciprocate vertically is installed in the sliding groove (14).

3. The energy-saving electric actuator for solar thermal power generation according to claim 2, characterized in that: The pushing mechanism includes a slider (18) and a connecting rod (6). The slider (18) is slidably connected in the groove (14) and fixedly connected to the upper end of the piston rod (7). One end of the connecting rod (6) is rotatably connected to the slider (18), and the other end is rotatably connected to the lead screw nut (17).

4. The energy-saving electric actuator for solar thermal power generation according to claim 2, characterized in that: The inlet pipe (9) is equipped with a one-way valve that allows liquid to flow from the oil reservoir (11) to the pump cylinder (8), and the outlet pipe (10) is equipped with a one-way valve that allows liquid to flow from the pump cylinder (8) to the elastic reservoir (12).

5. The energy-saving electric actuator for solar thermal power generation according to claim 1, characterized in that: The oil guide (22) has a detachable filter connector at the end away from the lead screw nut (17) for filtering impurities in the lubricating oil.

6. The energy-saving electric actuator for solar thermal power generation according to claim 3, characterized in that: The contact surface between the slider (18) and the groove (14) is provided with a wear-resistant pad, and the pad is detachably connected to the slider (18).

7. The energy-saving electric actuator for solar thermal power generation according to claim 1, characterized in that: A temperature distribution box (28) is fixedly installed on the side wall of the sleeve (3). A gas three-way valve (26) is provided below the temperature distribution box (28). The air outlet pipe of the fan (24) is replaced with a guide pipe (27). The guide pipe (27) is connected to the lower end of the gas three-way valve (26). One side of the gas three-way valve (26) is connected to the hot end of the temperature distribution box (28) through the hot end air inlet pipe (31). The other side of the gas three-way valve (26) is connected to the temperature distribution box (28) through the cold end air inlet pipe (29). The cold end of the box (28) is connected, and the cold end air inlet pipe (29) is equipped with a first magnetic control valve (30). The hot end air inlet pipe (31) is equipped with a second magnetic control valve (32). The cold end of the temperature distribution box (28) is connected to the inside of the drive motor (1) housing through the cold end air outlet pipe (34). The hot end of the temperature distribution box (28) is connected to the inside of the drive motor (1) housing through the hot end air outlet pipe (35). The temperature distribution box (28) is equipped with a heat distribution mechanism for dividing it into cold and hot ends.

8. The energy-saving electric actuator for solar thermal power generation according to claim 7, characterized in that: The heat distribution mechanism includes a dual-material semiconductor chip (33), which is fixedly installed in the middle of the inner wall of the temperature distribution chamber (28), dividing the temperature distribution chamber (28) into two sealed areas. The dual-material semiconductor chip (33) uses different semiconductor materials on both sides and is in contact with the two areas respectively.

9. The energy-saving electric actuator for solar thermal power generation according to claim 8, characterized in that: The inner walls of the hot and cold ends of the temperature distribution box (28) are provided with heat insulation layers, and the heat insulation layers are attached and fixed to the inner wall of the temperature distribution box (28).

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