Dustproof structure for linear driving device and heliostat push rod

Abstract

The invention discloses a dustproof structure for a linear driving device and a heliostat push rod, and the dustproof structure comprises a housing and an air suction assembly disposed in the housing, and the housing is connected with the dustproof structure for the linear driving device and the heliostat push rod and is communicated with the interior of the dustproof structure and the heliostat push rod. A rotary driving part of the linear driving device is in driving connection with the air suction assembly to drive the air suction assembly to rotate; a first one-way ventilation assembly and a second one-way ventilation assembly which are in one-way communication with the outside are arranged on the shell, and external air can enter the shell through the first one-way ventilation assembly and the second one-way ventilation assembly; the rotary driving part drives the air suction assembly to suck air towards the first one-way ventilation assembly when rotating forwards and drives the air suction assembly to suck air towards the second one-way ventilation assembly when rotating backwards. According to the dustproof structure, the air suction assembly is driven by the self-driving force of the linear driving device to pressurize the interior of the dustproof structure, it is guaranteed that the pressure of an inner cavity of the linear driving device is larger than the external atmospheric pressure no matter in any motion state, and dust and other impurities are prevented from entering from the outside.

Description

Technical Field

[0001] The invention belongs to the technical field of solar thermal power generation, and in particular relates to a dustproof structure for a linear drive device and a heliostat push rod. Background Art

[0002] Tower solar thermal power generation uses a large number of directional reflectors (heliostats) to focus sunlight onto a central heat exchanger (absorber) mounted on the top of the tower, and generates electricity by heating the fluid inside to drive the turbine to rotate.

[0003] The sun tracking function of the heliostat is achieved by rotating at two angles: elevation and azimuth. The elevation rotation of the heliostat is generally driven by an electric push rod. An electric push rod is a linear motion driver. In order to ensure that the electric push rod operates stably for a long time under outdoor conditions, it is necessary to ensure that dust and other debris do not enter its inner cavity.

[0004] However, after the existing electric push rods have been used for a long time, the sealing structure will age, which will still cause dust and other debris to enter its inner cavity. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a dustproof structure for a linear drive device and a heliostat push rod. The dustproof structure drives the suction component through the self-driving force of the linear drive device to increase the pressure inside the linear drive device, thereby ensuring that the pressure in the inner cavity of the linear drive device is greater than the external atmospheric pressure regardless of any movement state, thereby preventing dust and other debris from entering from the outside and protecting its internal structure.

[0006] To achieve the above object, the technical solution of the present invention is: A dustproof structure for a linear drive device, comprising a shell and an air suction component arranged in the shell, wherein the shell is connected to the linear drive device and communicates with the interior thereof, and a rotary drive portion of the linear drive device is drivingly connected to the air suction component to drive the latter to rotate; The shell is provided with a first one-way ventilation component and a second one-way ventilation component which are in one-way communication with the outside, and external air can enter the shell through the first one-way ventilation component and the second one-way ventilation component; The rotary drive unit drives the air suction component to suck air toward the first one-way ventilation component when rotating forward, and drives the air suction component to suck air toward the second one-way ventilation component when rotating reversely.

[0007] According to an embodiment of the present invention, the air suction assembly includes a first air suction member and a second air suction member, and the rotation driving unit drives the first air suction member and the second air suction member to rotate at the same time, and the first air suction member and the second air suction member rotate in opposite directions; The first one-way ventilation component and the second one-way ventilation component are arranged on the same side of the shell, and the first air suction member and the second air suction member have different air suction directions; When the rotary drive unit rotates forward, the first air suction member sucks air toward the position where the first one-way ventilation component is located, and when the rotary drive unit rotates reversely, the second air suction member sucks air toward the position where the second one-way ventilation component is located.

[0008] According to an embodiment of the present invention, the first air suction member is a forward-rotating impeller, and the second air suction member is a reverse-rotating impeller, and the forward-rotating impeller and the reverse-rotating impeller are coaxially connected.

[0009] According to an embodiment of the present invention, the air suction assembly includes a connecting shaft, the first air suction member and the second air suction member are both arranged on the connecting shaft, and the connecting shaft is connected to the rotation driving part.

[0010] According to an embodiment of the present invention, two communicating installation cavities are provided in the shell, and the first air suction member and the second air suction member are respectively provided in the two installation cavities.

[0011] According to an embodiment of the present invention, the first one-way ventilation component and the second one-way ventilation component are respectively a first one-way valve and a second one-way valve.

[0012] According to an embodiment of the present invention, the shell has an opening on one side away from the linear drive device, and an end cover is provided at the opening of the shell.

[0013] Based on the same concept, the present invention also provides a heliostat push rod, comprising any one of the above-mentioned dust-proof structures.

[0014] According to an embodiment of the present invention, the rotation driving part is a driving motor, and the output shaft of the driving motor is drivingly connected to the air suction component.

[0015] According to an embodiment of the present invention, it includes a push rod body, and the output shaft of the drive motor is drivingly connected to the push rod body through a transmission assembly.

[0016] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: The present invention ensures that the internal air pressure of the push rod is always higher than the external environment by setting two impellers, one positive and one negative, and cooperating with a one-way valve. This pressure difference design not only effectively prevents the intrusion of dust and rainwater, but also further reduces the possibility of dust and water accumulation in the gap by exhausting the internal gas to the outside, thereby greatly extending the service life and performance stability of the push rod.

[0017] The innovation of the present invention lies in the use of a drive motor to directly drive two sets of impeller supercharging mechanisms in opposite directions. This design ensures that the pressure in the internal cavity can be continuously higher than the external atmospheric pressure regardless of the movement state of the push rod. This two-way supercharging mechanism not only improves the dust prevention effect, but also enhances the adaptability and reliability of the push rod under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein: Figure 1 It is an overall schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention.

[0019] Description of reference numerals: 1. Push rod body; 2. Drive motor; 3. Connecting shaft; 4. Forward impeller; 5. Reverse impeller; 6. Housing; 7. End cover; 8. First one-way valve; 9. Second one-way valve; 10. Worm. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and use inaccurate ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0021] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] Example 1 See also Figures 1 to 2 The core of the present invention is to provide a dust-proof structure for a linear drive device, including a shell 6 and an air suction component arranged in the shell 6. The shell 6 is connected to the linear drive device and communicated with its interior. The rotating drive part of the linear drive device is driven and connected to the air suction component to drive it to rotate.

[0023] The shell 6 is provided with a first one-way ventilation component and a second one-way ventilation component which are in one-way communication with the outside, and external air can enter the shell 6 through the first one-way ventilation component and the second one-way ventilation component.

[0024] The rotary drive unit drives the air suction component to inhale air in the direction of the first one-way ventilation component when rotating forward, and drives the air suction component to inhale air in the direction of the second one-way ventilation component when rotating reversely.

[0025] Specifically, the air suction component includes a first air suction member and a second air suction member, and the rotary drive unit drives the first air suction member and the second air suction member to rotate at the same time, and the air suction directions of the first air suction member and the second air suction member are different. The first one-way ventilation component and the second one-way ventilation component are arranged on the same side of the shell 6 and are respectively arranged corresponding to the first air suction member and the second air suction member. In this embodiment, the first one-way ventilation component and the second one-way ventilation component are respectively a first one-way valve 8 and a second one-way valve 9.

[0026] When the rotary drive unit rotates forward, the first air suction member sucks air toward the position of the first one-way valve 8, and when it rotates reversely, the second air suction member sucks air toward the position of the second one-way valve 9. That is to say, gas is sucked into the outside through the first one-way valve 8 and the second one-way valve 9 during forward and reverse rotation respectively.

[0027] In this embodiment, the first air suction member is a forward impeller 4, and the second air suction member is a reverse impeller 5. The forward impeller 4 and the reverse impeller 5 are coaxially connected, and the blades of the forward impeller 4 and the reverse impeller 5 rotate in opposite directions, so that when the rotary drive unit rotates, the forward impeller 4 and the reverse impeller 5 respectively inhale air on both sides. The air suction component also includes a connecting shaft 3, and the forward impeller 4 and the reverse impeller 5 are both arranged on the connecting shaft 3, and the connecting shaft 3 is connected to the rotary drive unit.

[0028] Furthermore, two communicating installation cavities are provided in the housing 6, and the forward-rotating impeller 4 and the counter-rotating impeller 5 are respectively provided in the two installation cavities.

[0029] Furthermore, the housing 6 has an opening on one side away from the linear drive device, and an end cover 7 is provided at the opening of the housing 6. The forward impeller 4 and the reverse impeller 5 are installed into the housing 6 through the opening of the housing 6, and the end cover 7 is covered after installation.

[0030] The present invention ensures that the internal air pressure of the push rod is always higher than the external environment by setting two impellers, one positive and one negative, and cooperating with a one-way valve. This pressure difference design not only effectively prevents the intrusion of dust and rainwater, but also further reduces the possibility of dust and water accumulation in the gap by exhausting the internal gas to the outside, thereby greatly extending the service life and performance stability of the push rod.

[0031] The innovation of the present invention lies in using the drive motor 2 to directly drive two sets of impeller supercharging mechanisms in opposite directions. This design ensures that no matter what state the push rod is in, the pressure in its internal cavity can continue to be higher than the external atmospheric pressure. This two-way supercharging mechanism not only improves the dustproof effect, but also enhances the adaptability and reliability of the push rod under different working conditions.

[0032] Example 2 Another core of the present invention is to provide a heliostat push rod, including the dustproof structure for a linear drive device of Example 1, which is used for a heliostat in a tower solar thermal power station, and its function is to prevent dust from entering the push rod cavity when the heliostat push rod moves.

[0033] The rotary drive unit is specifically a drive motor 2 , and the output shaft of the drive motor 2 is connected to the connecting shaft 3 of the air intake assembly, that is, the connecting shaft 3 is an extended shaft of the drive motor 2 .

[0034] It also includes a push rod body 1, the output shaft of the driving motor 2 is drivingly connected to the push rod body 1 through a transmission assembly, the transmission assembly includes a worm 10, the output shaft of the driving motor 2 is connected to the worm 10, and the worm 10 is connected to the connecting shaft 3.

[0035] That is to say, the driving motor 2 itself is a driving component of the heliostat push rod. By adding a shell 6 and a connecting shaft 3 to the heliostat push rod, the existing heliostat push rod can be modified to obtain the present invention, which makes the cost of the present invention lower.

[0036] The present invention ensures that the air pressure inside the push rod is greater than the air pressure outside the push rod by setting the forward and reverse impeller structures. The advantage of this is that due to the effect of the air pressure difference, the gas inside the push rod will be exhausted to the outside through the gaps, so that dust and rain are difficult to enter these gaps, thereby protecting the internal structure of the push rod; The specific structure is (such as Figure 2 As shown in the figure, a forward impeller and a reverse impeller are arranged on the worm 10, and the two impellers are arranged one forward and one reverse, and cooperate with the first one-way valve 8 and the second one-way valve 9 to ensure that air can only enter from the outside, and ensure that no matter which direction the drive motor 2 rotates, there is always an impeller to draw air from the outside to form a positive pressure. The other impeller does not work due to the existence of the one-way valve, ensuring that the air pressure inside the push rod is always greater than the outside, and preventing external dust and moisture from entering the push rod cavity when the push rod moves. In other words, the two sets of impeller booster mechanisms are directly connected by the drive motor 2 to ensure that the pressure in the push rod cavity is greater than the external atmospheric pressure regardless of any movement state.

[0037] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A dustproof structure for a linear drive device, characterized in that: It comprises a shell and an air suction component arranged in the shell, the shell is connected to the linear drive device and communicated with the interior thereof, and the rotary drive part of the linear drive device is drivingly connected to the air suction component to drive the rotation thereof; The shell is provided with a first one-way ventilation component and a second one-way ventilation component which are in one-way communication with the outside, and external air can enter the shell through the first one-way ventilation component and the second one-way ventilation component; The rotary drive unit drives the air suction component to suck air toward the first one-way ventilation component when rotating forward, and drives the air suction component to suck air toward the second one-way ventilation component when rotating reversely.

2. The dustproof structure for a linear drive device according to claim 1, characterized in that: The suction assembly includes a first suction member and a second suction member, the rotation drive unit drives the first suction member and the second suction member to rotate simultaneously, and the suction directions of the first suction member and the second suction member are different; The first one-way ventilation component and the second one-way ventilation component are arranged on the same side of the shell and are respectively arranged corresponding to the first air suction member and the second air suction member; When the rotary drive unit rotates forward, the first air suction member sucks air toward the position where the first one-way ventilation component is located, and when the rotary drive unit rotates reversely, the second air suction member sucks air toward the position where the second one-way ventilation component is located.

3. The dustproof structure for a linear drive device according to claim 2, characterized in that: The first air suction member is a forward-rotating impeller, and the second air suction member is a reverse-rotating impeller. The forward-rotating impeller and the reverse-rotating impeller are coaxially connected.

4. The dustproof structure for a linear drive device according to claim 2, characterized in that: The suction assembly comprises a connecting shaft, the first suction member and the second suction member are both arranged on the connecting shaft, and the connecting shaft is connected to the rotation driving part.

5. The dustproof structure for a linear drive device according to claim 2, characterized in that: Two communicating installation cavities are arranged in the shell, and the first air suction component and the second air suction component are arranged in the two installation cavities respectively.

6. The dustproof structure for a linear drive device according to claim 1, characterized in that: The first one-way ventilation component and the second one-way ventilation component are respectively a first one-way valve and a second one-way valve.

7. The dustproof structure for a linear drive device according to claim 1, characterized in that: The shell has an opening at one side away from the linear drive device, and an end cover is provided at the opening of the shell.

8. A heliostat push rod, characterized in that: The invention comprises a dust-proof structure for a linear drive device as claimed in any one of claims 1 to 7.

9. The heliostat push rod according to claim 8, characterized in that: The rotary drive unit is a drive motor, and the output shaft of the drive motor is drivingly connected to the air suction component.

10. The heliostat push rod according to claim 9, characterized in that: It comprises a push rod body, and the output shaft of the driving motor is drivingly connected to the push rod body through a transmission assembly.

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