Oil-free rotary paddle type runner structure and small axial-flow rotary paddle type water turbine

Abstract

The utility model relates to an oil-free rotary paddle type runner structure and a small axial flow rotary paddle type water turbine. The oil-free rotating paddle type rotating wheel structure comprises a runner cone, a rotating wheel body, a sealing end cover, a plurality of rotating wheel blades, a plurality of operation frames and a front operation piece. When the angle of the runner blade needs to be adjusted, the push-pull rod is used for driving the front operation piece to move front and back, the operation frame can be linked to drive the runner blade to rotate, the angle of the runner blade is automatically adjusted, and the paddle rotating design is achieved. The runner blade servomotor used for pushing or pulling the push-pull rod to move front and back is moved out of the runner body, it is guaranteed that the two ends of the runner body are sealed, it is guaranteed that the runner body is not filled with other substances except air, and the oil-free design of the oil-free rotating paddle type runner structure is achieved. During assembly, the runner hub does not need to turn over, installation of all parts in the runner hub can be achieved, zero turning over during runner assembly is achieved, potential safety hazards during assembly turning over are eliminated, assembly safety is improved, and production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of small water turbine technology, and in particular to an oil-free propeller turbine structure and a small axial-flow propeller turbine. Background Technology

[0002] There are numerous small hydropower stations in rural areas of China, among which small axial-flow turbines are widely used due to their simple structure and convenient installation and maintenance. Small axial-flow turbines typically refer to those with a runner diameter of 2.0-2.5m or less, and generally include fixed-blade turbines and propeller turbines.

[0003] In constant-slope turbines, the blades are usually directly cast or welded to the runner. Although this structure is simple, the blade angle cannot be adjusted. If the operating head changes significantly, the operating range of this type of constant-slope turbine will deviate from the optimal design conditions, resulting in a decrease in turbine efficiency, unit efficiency, and power plant efficiency. Increased turbine vibration may also occur, and in some cases, the vibration may even prevent normal operation, seriously affecting the safe operation of the power plant.

[0004] In a propeller turbine, when the head and load of the power station change during actual operation, the blades are adjusted manually by adjusting the position of the positioning pins while the unit is stopped. This is to adjust the blade mounting angle, but usually only a few angles can be adjusted, which is time-consuming, labor-intensive, and has a very small adjustable range. Utility Model Content

[0005] Based on this, it is necessary to provide an oil-free propeller turbine structure and a small axial-flow propeller turbine that can achieve zero-turnover during turbine assembly, thereby eliminating the safety hazards during assembly and turning over, improving assembly safety, reducing production costs, and realizing the propeller-oriented design and green and environmentally friendly oil-free design of the turbine.

[0006] An oil-free propeller-type impeller structure, including

[0007] Drain cone;

[0008] The rotor body has a hollow structure and has a first open end and a second open end opposite to each other along the water flow direction; the side wall of the rotor body is provided with a plurality of mounting holes spaced apart circumferentially; the second open end is connected to the large end of the drain cone.

[0009] A sealing end cap is detachably and sealingly installed at the opening of the second opening end to isolate the internal space of the impeller body from the internal space of the drain cone;

[0010] Multiple impeller blades, each with its mounting portion sealed through one of the aforementioned mounting holes;

[0011] Multiple operating frames are provided, each corresponding to one of the multiple mounting holes; each operating frame is connected to the mounting part of the corresponding impeller blade.

[0012] A front-mounted operating component is disposed inside the first opening end and connected to each of the operating frames; the front-mounted operating component is operable to reciprocate along the mutually pointing directions of the first opening end and the second opening end, so as to drive the operating frame to drive the corresponding rotating wheel blade to rotate around the central axis of the corresponding mounting hole.

[0013] A small axial-flow propeller turbine includes, as described above, an oil-free propeller runner structure, a main shaft, a push-pull rod, and a runner blade servo unit.

[0014] The first open end is sealed to one end of the main shaft and is detachably connected;

[0015] The push-pull rod is slidably inserted into the main shaft and makes sealing contact with the inner wall of the main shaft near the end of the rotating wheel body; one end of the push-pull rod extends into the rotating wheel body and is detachably connected to the front operating component.

[0016] The rotor blade relay is connected to the end of the push-pull rod away from the rotor body and is used to drive the push-pull rod to move the front operating member back and forth in the direction in which the first opening end and the second opening end point to each other.

[0017] The aforementioned oil-free propeller turbine structure and small axial-flow propeller turbine, when requiring adjustment of the turbine blade angle, only require moving the front operating component back and forth using a push-pull rod. This causes the operating frame to rotate, automatically adjusting the turbine blade angle. The blade angle adjustment range is wide, achieving a propeller-like design for the oil-free propeller turbine structure. By removing the propeller blade servo unit used to push or pull the push-pull rod back and forth from the turbine body and ensuring both ends of the turbine body are sealed, no pressurized oil source needs to be injected into the turbine body, ensuring that no substances other than air enter the turbine body, thus achieving an oil-free design for the oil-free propeller turbine structure. Furthermore, the turbine body only contains the front operating component and multiple operating frames, all located inside the first open end. Therefore, the turbine body does not need to be flipped during assembly, allowing for the installation of all components within the turbine body. This achieves zero-flipping during turbine assembly, eliminating the safety hazards associated with flipping during assembly, improving assembly safety, and reducing production costs. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a schematic diagram of the oil-free propeller-type impeller structure in a preferred embodiment of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the rotor body in the oil-free propeller rotor structure shown;

[0021] Figure 3 for Figure 1 The diagram shows the structure of the operating frame in the oil-free propeller-type rotor structure, with the direction from the central axis of the corresponding mounting hole into the rotor body as the viewing angle.

[0022] The reference numerals in the detailed embodiments are as follows: 100, oil-free paddle-type impeller structure; 110, drain cone; 120, impeller body; 121, first open end; 122, second open end; 123, mounting hole; 124, support protrusion; 1241, guide slide hole; 1242, sealing groove; 130, sealing end cover; 140, impeller blade; 150, operating frame; 151, turntable; 1511, eccentric part; 152, connecting rod; 153, adapter; 160, front operating component; 161, operating part; 162, guide part; 170, first seal; 181, sealing limit sleeve; 182, second seal; 190, limit connector; 191, limit part; 192, connecting part; 200, main shaft; 300, push-pull rod. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements. It is also understood that when an element is referred to as being "between" two elements, it may be the only one between the two elements, or there may be one or more intermediate elements.

[0026] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0027] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0028] This utility model provides an oil-free propeller runner structure and a small axial-flow propeller turbine. The small axial-flow propeller turbine includes an oil-free propeller runner structure, a main shaft, a push-pull rod, and a runner blade relay. One end of the main shaft is sealed and detachably connected to one end of the oil-free propeller runner structure. The push-pull rod is slidably inserted into the main shaft, with one end connected to the oil-free propeller runner structure and the other end connected to the runner blade relay for transmission.

[0029] Figure 1 The diagram illustrates the structure of an oil-free propeller-type impeller according to one embodiment of the present invention. For ease of explanation, the accompanying drawings only show structures relevant to the embodiments of the present invention.

[0030] Please see Figure 1 and Figure 2 The oil-free paddle wheel structure 100 in the preferred embodiment of this utility model includes a drain cone 110, a wheel body 120, a sealing end cap 130, multiple wheel blades 140, multiple operating frames 150, and a front operating component 160.

[0031] Please refer to the following: Figure 2 The impeller body 120 has a hollow structure and has a first open end 121 and a second open end 122 opposite to each other along the water flow direction. The side wall of the impeller body 120 is provided with a plurality of mounting holes 123 spaced apart circumferentially. The second open end 122 is connected to the large end of the drain cone 110.

[0032] The sealing end cap 130 is detachably and sealingly installed at the opening of the second opening end 122 to isolate the internal space of the impeller body 120 from the internal space of the drain cone 110.

[0033] The mounting portions of multiple impeller blades 140 are respectively sealed and passed through multiple mounting holes 123. Multiple operating frames 150 correspond one-to-one with the multiple mounting holes 123. Each operating frame 150 is connected to the mounting portion of the corresponding impeller blade 140.

[0034] The front operating member 160 is located inside the first opening end 121 and is connected to each operating frame 150. The front operating member 160 is operable to reciprocate along the mutually pointing directions of the first opening end 121 and the second opening end 122, so as to drive the operating frame 150 to drive the corresponding rotating wheel blade 140 to rotate around the central axis of the corresponding mounting hole 123.

[0035] In a small axial-flow propeller turbine, the main shaft 200 is a hollow rod-shaped structure. One end of the main shaft 200 is sealed and detachably connected to the first open end 121. The push-pull rod 300 is slidably inserted into the main shaft 200 and is in sealed contact with the inner wall of the main shaft 200 near the runner body 120. One end of the push-pull rod 300 is connected to the front operating member 160. The runner blade relay (not shown) is connected to the end of the push-pull rod 300 away from the front operating member 160 and is used to drive the push-pull rod 300 to drive the front operating member 160 to reciprocate in the direction in which the first open end 121 and the second open end 122 point to each other.

[0036] In practical applications, when it is necessary to adjust the angle of the rotor blade 140, the rotor blade servo drive push-pull rod 300 drives the front operating component 160 to move in the direction from the first opening end 121 to the second opening end 122 or from the second opening end 122 to the first opening end 121. This causes the operating frame 150 to rotate in conjunction with the rotor blade 140, thereby automatically adjusting the angle of the rotor blade 140. The angle adjustment range of the rotor blade 140 is relatively wide, realizing the rotor design of the oil-free rotor structure 100.

[0037] The rotor blade relay, which provides thrust or pull to the push-pull rod 300, is located at the end of the push-pull rod 300 away from the rotor body 120. That is, the rotor blade relay is removed from the rotor body 120. Therefore, there is no need to inject pressurized oil into the rotor body 120. At the same time, the push-pull rod 300 makes a sealing contact with the inner wall of the main shaft 200 near the rotor body 120 to seal the first open end 121. The sealing end cap 130 seals the second open end 122, so that both ends of the rotor body 120 are sealed. This ensures that no substances other than air are filled into the rotor body 120, realizing the green and environmentally friendly oil-free design of the oil-free rotor structure 100.

[0038] Furthermore, the rotary wheel body 120 is equipped with only a front operating component 160 and multiple operating frames 150, and both the front operating component 160 and the operating frames 150 are located inside the first open end 121. Therefore, the rotary wheel body 120 does not need to be flipped during assembly, and the installation of each component inside the rotary wheel body 120 can be realized. This achieves zero flipping during rotary wheel assembly, eliminates the safety hazards during assembly flipping, improves assembly safety, and reduces production costs.

[0039] In some embodiments, a support protrusion 124 is formed inside the second opening end 122. The mounting portion of the rotor blade 140 extends into the rotor body 120 and is rotatably connected to the support protrusion 124. Thus, the support protrusion 124 supports the rotor blade 140, thereby providing two-point support for the rotor blade 140 from the rotor body 120. This improves the structural stability of the rotor blade 140 on the rotor body 120 and ensures that the rotor blade 140 can be smoothly adjusted in angle.

[0040] Furthermore, in some embodiments, a guide hole 1241 communicating with the opening of the second open end 122 is formed on the support protrusion 124. The front operating member 160 includes an operating part 161 and a guide part 162 disposed on the operating part 161. The operating part 161 is connected to each operating frame 150. One end of the guide part 162 away from the operating part 161 slidably passes through the guide hole 1241. In a small axial-flow propeller turbine, one end of the push-pull rod 300 extending into the runner body 120 is connected to the operating part 161.

[0041] Thus, one end of the front operating member 160 is connected to the push-pull rod 300 and multiple operating frames 150 respectively, and the other end is slidably inserted into the guide slide hole 1241 to improve the stability of the front operating member 160 when moving back and forth, thereby making the angle adjustment of the rotary blade 140 more stable and reliable.

[0042] It should be noted that the operating part 161 and the guide part 162 can be components that are molded separately and assembled, or they can be integrally molded or separately molded and then welded into a whole structure.

[0043] Furthermore, in some embodiments, the oilless propeller-type impeller structure 100 also includes a first seal 170 disposed circumferentially along the guide slide hole 1241. The first seal 170 is installed within the guide slide hole 1241. The inner wall of the first seal 170 is in sealing contact with the outer wall of the guide portion 162.

[0044] The first seal 170 acts as a seal between the guide portion 162 and the guide slide hole 1241, thereby forming two seals together with the sealing end cap 130 at the second port, effectively improving the sealing performance of the impeller body 120 and further improving the environmental performance of the oil-free impeller structure 100.

[0045] Furthermore, in some embodiments, a sealing groove 1242 is provided circumferentially at the edge of the guide slide hole 1241 opposite to the inner wall of the drain cone 110. The first sealing member 170 is engaged in the sealing groove 1242. The sealing groove 1242 not only facilitates the installation of the first sealing member 170 in the guide slide hole 1241, but also restricts the position of the first sealing member 170 in the guide slide hole 1241, preventing the first sealing member 170 from shifting when sliding back and forth in the guide portion 162, thereby improving the sealing reliability of the sealing member.

[0046] In some embodiments, the oil-free propeller turbine structure 100 further includes a sealing limiting sleeve 181 and an annular second seal 182. The second seal 182 is installed within the sealing limiting sleeve 181. The sealing limiting sleeve 181 is detachably installed in the inner hole of the main shaft 200 facing the turbine body 120. The inner wall of the second seal 182 is used for sealing contact with the outer wall of the push-pull rod 300. Specifically, in a small axial-flow propeller turbine, the inner diameter of the sealing limiting sleeve 181 is smaller than the inner diameter of the main shaft 200.

[0047] Thus, the density limiting sleeve and the second sealing element 182 can achieve a seal between the push-pull rod 300 and the inner wall of the main shaft 200 near the runner body 120, thereby sealing the first opening end 121. In practical applications, the sealing limiting sleeve 181 also limits the movement of the front operating element 160, preventing it from colliding with the main shaft 200 during its forward and backward movement, effectively extending the service life of the main shaft 200 and reducing the operating cost of the small axial-flow propeller turbine.

[0048] Furthermore, in some embodiments, the oil-free propeller-type impeller structure 100 also includes a limiting connector 190 with a threaded hole. The limiting connector 190 is used to sleeve one end of the push-pull rod 300 located within the impeller body 120, and the threaded hole is screwed into the external thread of the end of the push-pull rod 300. The limiting connector 190 is detachably connected to the front operating member 160.

[0049] Thus, when it is necessary to detachably connect the front operating component 160 to the push-pull rod 300, it is only necessary to detachably connect the limiting connector 190 to the front operating component 160 and screw the limiting connector 190 to one end of the push-pull rod 300 located inside the runner body 120. This operation is convenient and quick, effectively improving the assembly convenience of the oil-free propeller runner structure 100. At the same time, the limiting connector 190 is located on the side of the front operating component 160 away from the drain cone 110. Therefore, when the push-pull rod 300 drives the front operating component 160 to move in the direction from the second opening end 122 to the first opening end 121, even if the push-pull rod 300 moves excessively, the limiting connector 190 will directly contact the main shaft 200. This effectively reduces the possibility of collision damage to the front operating component 160, extends the service life of the front operating component 160, and reduces the operating cost of the small axial-flow propeller turbine.

[0050] Furthermore, in some embodiments, the limiting connector 190 includes a limiting portion 191 with a threaded hole and a connecting portion 192 with a threaded hole. The limiting portion 191 and the connecting portion 192 are sequentially screwed to the end of the push-pull rod 300 located inside the rotary wheel body 120. The connecting portion 192 is detachably connected to the front operating member 160. The end face of the limiting portion 191 facing away from the connecting portion 192 is in contact with the end face of the sealing limiting sleeve 181 facing the drain cone 110. The limiting portion 191 and the connecting portion 192 are two separately formed independent parts.

[0051] Thus, the connecting part 192 is sleeved and screwed onto the end of the push-pull rod 300 located inside the runner body 120, and is detachably connected to the front operating member 160, realizing a detachable connection between the front operating member 160 and the push-pull rod 300. The limiting part 191 is sleeved and screwed onto the push-pull rod 300 and is located on the side of the connecting part 192 away from the front operating member 160, so as to limit the extreme position of the push-pull rod 300 in the direction from the second opening end 122 to the first opening end 121. Even if the limiting part 191 is damaged due to collision with the end of the main shaft 200, the replacement of the limiting part 191 is simpler, further reducing the operating cost of the small axial flow propeller turbine.

[0052] Please refer to the following: Figure 3 In some embodiments, the operating frame 150 includes a turntable 151, a connecting rod 152, and an adapter 153. The turntable 151 is detachably mounted on the mounting portion of the impeller blade 140 and contacts the inner wall of the impeller body 120. The turntable 151 has an eccentric portion 1511 radially eccentrically disposed relative to the mounting hole 123. The two ends of the connecting rod 152 are rotatably connected to the corresponding eccentric portion 1511 and the corresponding adapter 153, respectively.

[0053] When the angle of the impeller blade 140 needs to be adjusted, the impeller blade relay is used to drive the push-pull rod 300 to move the front operating member 160 in the direction from the first opening end 121 to the second opening end 122 or from the second opening end 122 to the first opening end 121. This pushes or pulls the adapter 153 in the direction from the first opening end 121 to the second opening end 122 or from the second opening end 122 to the first opening end 121. At this time, the connecting rod 152 will push or pull the eccentric part 1511 to move, thereby driving the turntable 151 to rotate forward or backward around the central axis of the corresponding mounting hole 123. The impeller blade 140 will also rotate with the corresponding turntable 151 to achieve automatic rotation of the impeller blade 140.

[0054] 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.

[0055] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An oil-free propeller-type impeller structure, characterized in that, include Drain cone; The rotor body has a hollow structure and has a first open end and a second open end opposite to each other along the water flow direction; the side wall of the rotor body is provided with a plurality of mounting holes spaced apart circumferentially; the second open end is connected to the large end of the drain cone. A sealing end cap is detachably and sealingly installed at the opening of the second opening end to isolate the internal space of the impeller body from the internal space of the drain cone; Multiple impeller blades, each with its mounting portion sealed through one of the aforementioned mounting holes; Multiple operating frames are provided, each corresponding to one of the multiple mounting holes; each operating frame is connected to the mounting part of the corresponding impeller blade. A front-mounted operating component is disposed inside the first opening end and connected to each of the operating frames; the front-mounted operating component is operable to reciprocate along the mutually pointing directions of the first opening end and the second opening end, so as to drive the operating frame to drive the corresponding rotating wheel blade to rotate around the central axis of the corresponding mounting hole.

2. The oil-free propeller-type impeller structure according to claim 1, characterized in that, A support protrusion is formed inside the second opening end; the mounting part of the rotor blade extends into the rotor body and is rotatably connected to the support protrusion.

3. The oil-free propeller-type impeller structure according to claim 2, characterized in that, The support protrusion has a guide hole that communicates with the opening at the second opening end; the front operating member includes an operating part and a guide part disposed on the operating part; the operating part is connected to each of the operating frames; one end of the guide part away from the operating part is slidably inserted through the guide hole.

4. The oil-free propeller-type impeller structure according to claim 3, characterized in that, It also includes a first sealing element disposed circumferentially along the guide slide hole; the sealing element is installed in the guide slide hole; the inner wall of the first sealing element is in sealing contact with the outer wall of the guide portion.

5. The oil-free propeller-type impeller structure according to claim 4, characterized in that, The guide hole has a sealing groove along its circumferential direction at the edge of the inner wall of one end opposite to the drain cone; the first sealing element is engaged in the sealing groove.

6. The oil-free propeller-type impeller structure according to claim 1, characterized in that, It also includes a sealing limiting sleeve and a second annular sealing element; the second sealing element is installed inside the sealing limiting sleeve; the sealing limiting sleeve is used to be detachably installed in the inner hole of the main shaft facing the end of the rotating wheel body; the inner wall of the second sealing element is used to make sealing contact with the outer wall of the push-pull rod.

7. The oil-free propeller-type impeller structure according to claim 6, characterized in that, It also includes a limiting connector with a threaded hole; the limiting connector is used to be sleeved on one end of the push-pull rod located in the rotating wheel body, and the threaded hole is screwed to the external thread of the end of the push-pull rod; the limiting connector is detachably connected to the front operating component.

8. The oil-free propeller-type impeller structure according to claim 7, characterized in that, The limiting connector includes a limiting part and a connecting part; the limiting part and the connecting part are used to be screwed sequentially to the end of the push-pull rod located at one end of the rotating body; the connecting part is detachably connected to the front operating component; the end face of the limiting part away from the connecting part can contact the end face of the sealing limiting sleeve facing the drain cone.

9. The oil-free propeller-type impeller structure according to claim 1, characterized in that, The operating frame includes a turntable, a connecting rod, and an adapter; the turntable is detachably mounted on the mounting portion of the impeller blade and contacts the inner wall of the impeller body; the turntable has an eccentric portion that is radially eccentric relative to the mounting hole; the two ends of the connecting rod are rotatably connected to the corresponding eccentric portion and the corresponding adapter, respectively.

10. A small axial-flow propeller turbine, characterized in that, Includes the oil-free propeller-type runner structure, main shaft, push-pull rod, and runner blade relay as described in any one of claims 1 to 9; The first open end is sealed to one end of the main shaft and is detachably connected; The push-pull rod is slidably inserted into the main shaft and makes sealing contact with the inner wall of the main shaft near the end of the rotating wheel body; one end of the push-pull rod extends into the rotating wheel body and is detachably connected to the front operating component. The rotor blade relay is connected to the end of the push-pull rod away from the rotor body and is used to drive the push-pull rod to move the front operating member back and forth in the direction in which the first opening end and the second opening end point to each other.

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