Piston type displacement adjusting device

Abstract

The piston type displacement adjusting device comprises a cylinder body, the cylinder body is provided with an air inlet and a cavity which communicate with each other, and the inner wall of the cavity is provided with an internal thread structure; the piston body is movably arranged in the cavity, an external thread structure is arranged on the peripheral wall of the piston body and matched with the internal thread structure in a threaded connection mode, a through hole is formed in the middle of the piston body, and fan blades are arranged on the hole wall of the through hole; the first fan is movably arranged in the cavity and is closer to the air inlet than the piston body; the transmission plate is movably arranged on the side wall of the cavity, and the end, close to the piston body, of the transmission plate can be in transmission fit with the first fan; the mounting frame is slidably arranged in the cavity and is closer to the air inlet than the first fan, and the mounting frame is provided with a vent hole; and the plugging block is movably arranged on the mounting frame and is in transmission connection with the end, away from the piston body, of the transmission plate, and the plugging block can plug the vent hole.

Description

Technical Field

[0001] This application relates to the technical field of power generation equipment, and in particular to a piston-type displacement regulating device. Background Technology

[0002] A water turbine is a type of power machine that converts the energy of flowing water into mechanical energy. Its working principle is based on energy conversion, specifically using the kinetic and potential energy of the water flow to drive the turbine to rotate. When water with a certain amount of energy flows through the turbine, the water flow acts on the blades of the turbine. According to Newton's third law, the blades will experience a force from the water flow, thereby generating torque that makes the turbine rotate. For example, in a common mixed-flow turbine, water enters through the volute and is evenly guided to the runner by guide vanes. The special shape of the runner blades allows the water's energy to be effectively converted into the runner's rotational mechanical energy as it passes through. As a power generation device, the turbine's rotational speed directly affects the frequency of the alternating current output by the generator. The piston-type displacement regulating device can precisely control the turbine's guide vane opening, thereby regulating the water flow into the turbine. When the grid frequency changes, the piston-type displacement regulating device can quickly and accurately adjust the turbine's speed to match the generator's frequency with the grid frequency. For example, if the grid frequency increases, the piston-type displacement regulating device can reduce the turbine's guide vane opening, reduce the water flow, thereby reducing the turbine's speed and ensuring a stable generator output frequency.

[0003] In existing piston-type displacement regulating devices of turbine governors, the piston and other components have a certain mass, resulting in mechanical inertia. When the piston body suddenly needs to change its displacement, the mechanical inertia will cause the piston body to not respond immediately. If the inertial force on one side of the piston body is larger than that on the other side, the piston body will tilt or experience excessive local stress under the action of this unbalanced force. Inside the cylinder, this tilt or excessive local stress will generate additional friction between the piston body and the inner wall of the cylinder, and may even cause the piston body to jam momentarily, making it unable to change its displacement as required. Utility Model Content

[0004] Therefore, it is necessary to provide a piston-type displacement adjustment device to address the problem that mechanical inertia causes the piston to fail to respond immediately to movement, and uneven force causes it to jam, resulting in the inability to change displacement as required.

[0005] This application provides a piston-type displacement adjusting device, which includes:

[0006] The cylinder body has a communicating air inlet and a chamber, and the inner wall of the chamber has an internal thread structure.

[0007] A piston body is movably disposed within the cavity, and the outer peripheral wall of the piston body is provided with an external thread structure, the external thread structure being screwed into the internal thread structure. A through hole is provided in the middle of the piston body, and the wall of the through hole is provided with fan blades.

[0008] A first fan is movably disposed within the chamber and is arranged closer to the air inlet than the piston body;

[0009] A transmission plate is movably disposed on the side wall of the chamber, and the end of the transmission plate near the piston body can be driven and engaged with the first fan.

[0010] A mounting frame, slidably disposed within the chamber and arranged closer to the air inlet than the first fan, the mounting frame being provided with vent holes; and

[0011] A blocking block is movably disposed on the mounting frame and drivenly connected to the end of the transmission plate away from the piston body. The blocking block is capable of blocking the vent hole.

[0012] When the piston displacement adjustment device of this solution is working normally, the air pump introduces gas into the cylinder chamber through the air inlet. The gas acts on the piston blades, causing the piston to rotate. Utilizing the threaded transmission effect of the internal and external threaded structures, the piston can move normally within the chamber. To match the adjustment of the power grid frequency, when the piston needs to move suddenly, the air pump will first receive a working command to suddenly increase the air supply into the cylinder. At this time, the blades of the first fan are blown and rotate, and the first fan blows air towards the mounting frame, allowing the first fan to slide within the chamber towards the piston. The outer wall will then press one end of the transmission plate. After being pressed, the end of the transmission plate connected to the sealing block will lift up and slide within the mounting frame, thereby sealing the vent hole of the mounting frame. On this basis, the airflow input by the air pump blows the mounting frame and the sealing block, causing the mounting frame, the sealing block, and the first fan to press towards the piston body, thereby enabling the piston body to slide quickly and overcome mechanical inertia to respond quickly. In addition, with the help of the pushing force and the transmission effect of the threaded engagement structure, it also ensures that the piston body is subjected to uniform force, preventing the piston body from tilting to one side and getting stuck, and ensuring that the piston body can be smoothly adjusted according to requirements.

[0013] The technical solution of this application will be further described below:

[0014] In one embodiment, the piston displacement adjustment device further includes a torque spring, one end of which is connected to the end of the transmission plate near the first fan, and the other end of which is disposed on the side wall of the chamber.

[0015] In one embodiment, the sidewall of the chamber is recessed to form a groove, and the torque spring is disposed within the groove.

[0016] In one embodiment, multiple transmission plates and multiple sealing blocks are provided. The multiple transmission plates are arranged at intervals along the circumference of the chamber, and the multiple sealing blocks are arranged along the circumference in the vent hole, with each sealing block corresponding to a transmission plate.

[0017] In one embodiment, the cylinder block is provided with an exhaust port at the end away from the air inlet, and the piston displacement adjustment device further includes an annular frame and a second fan. The annular frame is disposed at the exhaust port, and the second fan is disposed in the annular cavity of the annular frame.

[0018] In one embodiment, the piston displacement adjustment device further includes an installation chamber and a support, the cylinder is disposed between the installation chamber and the support, the installation chamber is connected to the support, an air pump is disposed in the installation chamber, the exhaust port of the air pump is connected to an air supply pipe, and the end of the air supply pipe away from the air pump is disposed at the air inlet.

[0019] In one embodiment, the piston displacement adjustment device further includes a fixing plate disposed above the mounting chamber. The fixing plate has a sliding opening, and the piston body has two sliding sections with a first sliding post. The end of the first sliding post away from the piston body is slidably inserted into the sliding opening.

[0020] In one embodiment, a sliding plate is fixedly connected to the end of the first sliding column away from the piston body. The sliding plate has a sliding hole, the length direction of which intersects the moving direction of the piston body. A second sliding column that can slide along the sliding hole is installed at both ends of the length direction of the sliding hole. The fixed plate has two arc-shaped grooves, and the second sliding column is slidably inserted into the corresponding arc-shaped groove.

[0021] The concave sides of the two arc-shaped grooves are arranged facing each other.

[0022] In one embodiment, the piston displacement adjusting device further includes a damping spring abutting between the two second sliding columns.

[0023] In one embodiment, the piston displacement adjusting device further includes a mounting block having a threaded groove. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the piston-type displacement adjustment device according to an embodiment of this application.

[0027] Figure 2 for Figure 1 A structural diagram from another perspective.

[0028] Figure 3 This is a schematic diagram of the internal structure of a piston-type displacement adjustment device.

[0029] Figure 4 for Figure 3 A structural diagram from another perspective.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Piston-type displacement adjustment device; 10. Cylinder body; 11. Air inlet; 12. Chamber; 20. Piston body; 21. Fan blade; 30. First fan; 40. Transmission plate; 50. Mounting frame; 60. Sealing block; 70. Torque spring; 80. Annular frame; 80a. Second fan; 90. Mounting chamber; 90a. Support; 90b. Fixing plate; 91b. Sliding port; 92b. Arc groove; 90c. First sliding column; 90d. Sliding plate; 90d. Sliding hole; 90e. Second sliding column; 90f. Damping spring; 90g. Mounting block. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] See Figures 1 to 4 The present application illustrates a piston displacement adjustment device 100, which includes a cylinder 10, a piston 20, a first fan 30, a transmission plate 40, a mounting frame 50, and a sealing block 60.

[0039] The cylinder body 10 has a connected air inlet 11 and a chamber 12. The inner wall of the chamber 12 has an internal thread structure. The piston body 20 is movably disposed in the chamber 12, and the outer peripheral wall of the piston body 20 has an external thread structure. The external thread structure is screwed into the internal thread structure. A through hole is opened in the middle of the piston body 20, and the wall of the through hole is provided with a fan blade 21. The first fan 30 is movably disposed in the chamber 12 and is arranged closer to the air inlet 11 than the piston body 20. The transmission plate 40 is movably disposed on the side wall of the chamber 12, and the end of the transmission plate 40 near the piston body 20 can be driven and engaged with the first fan 30. The mounting frame 50 is slidably disposed in the chamber 12 and is arranged closer to the air inlet 11 than the first fan 30. The mounting frame 50 has a vent hole. The sealing block 60 is movably disposed on the mounting frame 50 and is driven and connected to the end of the transmission plate 40 away from the piston body 20. The sealing block 60 can block the vent hole.

[0040] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: When the piston displacement adjustment device 100 of this solution is working normally, the air pump introduces gas into the chamber 12 of the cylinder 10 through the air inlet 11. The gas acts on the fan blade 21 of the piston body 20, causing the piston body 20 to rotate. With the help of the thread transmission effect of the internal thread structure and the external thread structure, the piston body 20 can move normally in the chamber 12.

[0041] To match the adjustment of the power grid frequency, when the piston 20 needs to move suddenly, the air pump will first receive a working command to suddenly increase the air supply to the cylinder 10. At this time, the blades of the first fan 30 are blown and rotated, and the first fan 30 blows air towards the mounting frame 50, allowing the first fan 30 to slide in the chamber 12 towards the piston 20. The outer wall of the first fan 30 will then press one end of the transmission plate 40. After being pressed, the end of the transmission plate 40 connected to the sealing block 60 will lift up and slide in the mounting frame 50, thereby blocking the airflow in the mounting frame 50. After the air vent is blocked, the airflow input by the air pump blows the mounting frame 50 and the blocking block 60, causing the mounting frame 50, the blocking block 60 and the first fan 30 to squeeze towards the piston body 20, thereby enabling the piston body 20 to slide quickly and overcome mechanical inertia to respond quickly. In addition, with the help of the pushing force and the transmission effect of the threaded engagement structure, the piston body 20 is also ensured to be evenly stressed, preventing the piston body 20 from tilting to one side and getting stuck, and ensuring that the piston body 20 can be smoothly adjusted according to the requirements.

[0042] Please continue reading Figure 3 and Figure 4 Based on the above embodiments, the piston-type displacement adjusting device 100 further includes a torque spring 70. One end of the torque spring 70 is connected to the end of the transmission plate 40 near the first fan 30, and the other end of the torque spring 70 is disposed on the side wall of the chamber 12. The torque spring 70 is used to apply an elastic tension to the transmission plate 40, so as to drive the transmission plate 40 and the sealing block 60 to move and reset automatically, so as to reopen the vent and facilitate the normal secondary use of the piston-type displacement adjusting device 100.

[0043] Furthermore, a groove is recessed in the side wall of chamber 12, and the torque spring 70 is disposed in the groove. By providing a groove in the cylinder body 10, the transmission plate 40 can be driven to tilt up under the action of the torque spring 70, and the groove can prevent the side of the transmission plate 40 away from the first fan 30 from being directly squeezed by the piston.

[0044] Preferably, based on any of the above embodiments, multiple transmission plates 40 and sealing blocks 60 are provided. Multiple transmission plates 40 are arranged at intervals along the circumference of the chamber 12, and multiple sealing blocks 60 are arranged circumferentially within the vent hole, with each sealing block 60 corresponding to a transmission plate 40. During operation, as the first fan 30 drives multiple transmission plates 40 to slide simultaneously, multiple sealing blocks 60 move synchronously towards the center of the vent hole, thereby sealing the vent hole. The purpose of providing multiple sealing blocks 60 is that each sealing block 60 only needs to move the radius length of the vent hole, shortening the movement time of the sealing block 60 and thus achieving faster sealing of the vent hole, improving the response speed of the piston body 20.

[0045] Please continue reading Figures 2 to 4 Furthermore, in another embodiment, an exhaust port is provided at the end of the cylinder 10 away from the air inlet 11. The piston displacement adjustment device 100 also includes an annular frame 80 and a second fan 80a. The annular frame 80 is located at the exhaust port, and the second fan 80a is located in the annular cavity of the annular frame 80. During operation, the second fan 80a can be driven to rotate by the air flow inside the cylinder 10, drawing air out of the cylinder 10 through the exhaust port, accelerating the air flow speed inside the cylinder 10, and helping to improve the movement response speed of the piston 20.

[0046] In addition, based on any of the above embodiments, the piston displacement adjustment device 100 also includes an installation chamber 90 and a support 90a. The cylinder body 10 is disposed between the installation chamber 90 and the support 90a. The installation chamber 90 is connected to the support 90a. An air pump is disposed in the installation chamber 90. The exhaust port of the air pump is connected to an air supply pipe. The end of the air supply pipe away from the air pump is disposed at the air inlet 11.

[0047] Support 90a is used to support the entire piston displacement adjustment device 100. Mounting chamber 90 is used to install equipment such as air pumps, and to shield the air pumps, thereby protecting them and improving the overall aesthetics of the machine.

[0048] Please continue reading Figures 1 to 4 Furthermore, the piston displacement adjustment device 100 also includes a fixing plate 90b, which is disposed above the mounting chamber 90. The fixing plate 90b has a sliding opening 91b, and two sliding sections of the piston body 20 have first sliding columns 90c. The end of the first sliding column 90c away from the piston body 20 is slidably inserted into the sliding opening 91b. During the movement of the piston body 20 in the chamber 12 of the cylinder 10, one end of the first sliding column 90c slides synchronously in the annular groove on the outer circumference of the piston body 20, while the other end of the first sliding column 90c slides along the sliding opening 91b. This allows the first sliding column 90c to guide the movement of the piston body 20 and improve the stability of the piston body 20's movement posture.

[0049] Furthermore, a sliding plate 90d is fixedly connected to the end of the first sliding column 90c away from the piston body 20. The sliding plate 90d has a sliding hole 90d. The length direction of the sliding hole 90d intersects the moving direction of the piston body 20. A second sliding column 90e, which can slide along the sliding hole 90d, is installed at both ends of the length direction of the sliding hole 90d. The fixed plate 90b has two arc-shaped grooves 92b. The second sliding column 90e is slidably inserted into the corresponding arc-shaped groove 92b. The concave sides of the two arc-shaped grooves 92b are arranged facing each other.

[0050] Based on the above embodiments, the piston displacement adjustment device 100 further includes a damping spring 90f, which abuts between two second sliding columns 90e.

[0051] As the piston body 20 slides toward the outlet, the two second sliding pillars 90e move inwards towards each other, further supporting and guiding the movement of the piston body 20. Furthermore, as the two sliding pillars approach each other, the damping spring 90f is compressed, generating a counter-elastic support force on the two second sliding pillars 90e to prevent excessive sliding force and excessive speed, thus avoiding collision.

[0052] In another embodiment, the piston displacement adjusting device 100 further includes a mounting block 90g, which has a threaded groove. By providing a threaded groove on the mounting block 90g, it is convenient to install and fix related components such as the turbine governor on the mounting block 90g. At the same time, the damping spring 90f provided above can also prevent the two mounting blocks 90g from approaching each other too quickly and causing hard collision damage.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A piston-type displacement adjusting device, characterized in that, include: The cylinder body has a communicating air inlet and a chamber, and the inner wall of the chamber has an internal thread structure. A piston body is movably disposed within the cavity, and the outer peripheral wall of the piston body is provided with an external thread structure, the external thread structure being screwed into the internal thread structure. A through hole is provided in the middle of the piston body, and the wall of the through hole is provided with fan blades. A first fan is movably disposed within the chamber and is arranged closer to the air inlet than the piston body; A transmission plate is movably disposed on the side wall of the chamber, and the end of the transmission plate near the piston body can be driven and engaged with the first fan. A mounting frame, slidably disposed within the chamber and arranged closer to the air inlet than the first fan, is provided with vent holes; and A blocking block is movably disposed on the mounting frame and drivenly connected to the end of the transmission plate away from the piston body. The blocking block is capable of blocking the vent hole.

2. The piston-type displacement adjusting device according to claim 1, characterized in that, The piston-type displacement adjustment device also includes a torque spring, one end of which is connected to the end of the transmission plate near the first fan, and the other end of which is disposed on the side wall of the chamber.

3. The piston-type displacement adjusting device according to claim 2, characterized in that, The side wall of the chamber is recessed to form a groove, and the torque spring is disposed in the groove.

4. The piston-type displacement adjusting device according to claim 1, characterized in that, Multiple transmission plates and multiple sealing blocks are provided. The multiple transmission plates are arranged at intervals along the circumference of the chamber, and the multiple sealing blocks are arranged along the circumference in the vent hole. Each sealing block is connected to a transmission plate in a one-to-one correspondence.

5. The piston-type displacement adjusting device according to claim 1, characterized in that, The cylinder block is provided with an exhaust port at the end away from the air inlet. The piston displacement adjustment device also includes an annular frame and a second fan. The annular frame is located at the exhaust port, and the second fan is located in the annular cavity of the annular frame.

6. The piston-type displacement adjusting device according to claim 1, characterized in that, The piston displacement adjustment device further includes an installation chamber and a support. The cylinder is disposed between the installation chamber and the support. The installation chamber is connected to the support. An air pump is disposed in the installation chamber. The exhaust port of the air pump is connected to an air supply pipe. The end of the air supply pipe away from the air pump is disposed at the air inlet.

7. The piston-type displacement adjusting device according to claim 6, characterized in that, The piston displacement adjustment device further includes a fixing plate, which is disposed above the installation chamber. The fixing plate has a sliding opening, and the piston body has two sliding sections with a first sliding column. The end of the first sliding column away from the piston body is slidably inserted into the sliding opening.

8. The piston-type displacement adjusting device according to claim 7, characterized in that, A sliding plate is fixedly connected to the end of the first sliding column away from the piston body. The sliding plate has a sliding hole. The length direction of the sliding hole intersects the moving direction of the piston body. A second sliding column that can slide along the sliding hole is installed at both ends of the length direction of the sliding hole. The fixed plate has two arc-shaped grooves. The second sliding column is slidably installed in the corresponding arc-shaped groove. The concave sides of the two arc-shaped grooves are arranged facing each other.

9. The piston-type displacement adjusting device according to claim 8, characterized in that, The piston-type displacement adjusting device also includes a damping spring, which abuts between the two second sliding columns.

10. The piston-type displacement adjusting device according to claim 8, characterized in that, The piston-type displacement adjusting device also includes a mounting block, which has a threaded groove.

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