Water guide mechanism of water turbine

Abstract

The water guide mechanism comprises a top cover plate, a plurality of through holes are formed in the top cover plate, guide vane shafts are rotatably inserted into the through holes, the bottom ends of the guide vane shafts penetrate through the bottom end of the top cover plate to be connected with guide vanes, and the top ends of the guide vane shafts are rotatably connected with rotating arms; a lantern ring is fixedly arranged at the position, located above the top cover plate, of the outer wall of each guide vane shaft in a sleeving mode, a connecting steel rod is fixedly arranged at the position of the outer wall of each lantern ring, one end of each connecting steel rod is fixedly connected with one side of the outer wall of the top base, and a buffering structure is arranged on the guide vane shafts of the rotating arm so that radial impact force can be reduced to the maximum extent; due to the fact that the rotating shaft is located in the center of the rotating arm, the buffering structure is arranged on the rotating shaft, radial impact force can be directly absorbed and dispersed, the influence on the rotating arm and other components is reduced, the vibration amplitude of the impact force on the rotating arm can be effectively reduced through the buffering structure, and the stability and reliability of the rotating arm are improved.

Description

Technical Field

[0001] The utility model relates to a water guiding mechanism, in particular to a water guiding mechanism of a water turbine. Background Art

[0002] A water turbine is a device that converts water flow energy into mechanical energy. It is mainly used in hydroelectric power generation and water conservancy projects. It includes components such as a runner, a water guide pipe, a water gate, and a turbine base. Water flows into the turbine from the water guide pipe, and the water flow is controlled by the water gate. After passing through the blades of the runner, the kinetic energy of the water is converted into mechanical energy to drive the generator or other mechanical equipment to work. Water turbines can be classified according to the direction of water flow, blade shape, runner structure, etc. Common types include oblique flow, axial flow, and mixed flow turbines. The water guide mechanism of the turbine includes a guide vane crank arm fixedly connected to the guide vane. The guide vane crank arm is hinged to the adjustable connecting rod, and the adjustable connecting rod is hinged to the control ring. The push-pull rod controlled by the oil cylinder drives the control ring to rotate, thereby driving the opening of the guide vane to change:

[0003] In the comparative document CN210799218U, "the rotating arm then reduces the corresponding radial impact force through an elastic mechanism, and the elastic mechanism is used to buffer the pressure between the first connecting rod and the second connecting rod through a second spring. At the same time, the adjacent rotating arm cooperates with the first sleeve through the first spring to reduce the radial impact force on the above-mentioned rotating arm, thereby relieving the pressure on the impeller."

[0004] However, applying the elastic mechanism directly to the rotating arm will have the following disadvantages: the buffer structure is located at one end of the rotating arm. When the impact force acts on the rotating arm, part of the impact force will be transmitted to other parts of the rotating arm instead of being completely absorbed by the buffer structure, thereby limiting its effect in reducing the impact force. In addition, the buffer structure may cause uneven force on the rotating arm. Especially when the rotating arm works for a long time, structural deformation or fatigue may occur, affecting its service life and performance stability.

[0005] It should be noted that the above content belongs to the technical cognition scope of the utility model applicant and does not necessarily constitute prior art. Utility Model Content

[0006] In order to solve the above problems, the purpose of the utility model is to provide a water guide mechanism for a water turbine.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a water guide mechanism of a water turbine, comprising a top cover plate:

[0008] The top cover plate is provided with a plurality of through holes, in which a guide vane shaft is rotatably inserted, the bottom end of the guide vane shaft passes through the bottom end of the top cover plate and is connected to a guide vane, and the top end of the guide vane shaft is rotatably connected to a rotating arm;

[0009] The outer wall of each guide vane shaft is fixedly sleeved with a ring at a position above the top cover plate, and a connecting steel rod is fixedly provided at the position of the outer wall of the ring, one end of the connecting steel rod is fixedly connected to one side of the outer wall of the top seat, and a connecting seat is fixedly provided at the bottom end of the top seat, and a sliding seat is fixedly provided at the bottom end of the connecting seat, and the sliding seat is slidingly connected to the inside of the arc-shaped slide groove, and the two sides of the inner wall of the arc-shaped slide groove are fixedly connected to the two ends of the arc-shaped slide rod, and the arc-shaped slide rod is connected to the through hole through the insertion, and buffer springs are sleeved on both sides of the outer wall of the arc-shaped slide rod.

[0010] In one example, one end of the two buffer springs is fixedly connected to the inner wall of the arc-shaped slide groove, and the other end of the two buffer springs is in contact with the outer wall of the connecting seat.

[0011] In one example, the arc-shaped slide grooves are evenly opened on the top cover plate, and each arc-shaped slide groove is arranged with the guide vane shaft as the center.

[0012] In one example, the diameter of the slide seat matches the width of the arc-shaped slide groove.

[0013] The water guide mechanism of a water turbine proposed by the utility model can bring the following beneficial effects:

[0014] The utility model arranges a buffer structure on the guide vane shaft of the rotating arm through a top cover plate, a rotating arm, a guide vane shaft, a collar, a connecting steel rod, an arc-shaped slide groove, a sliding seat, a connecting seat, a top seat, an arc-shaped slide rod, a buffer spring and a perforation, and the radial impact force can be reduced to the greatest extent. This is because the rotating shaft is located at the center position of the rotating arm. By arranging the buffer structure on the rotating shaft, the radial impact force can be directly absorbed and dispersed, thereby reducing the impact on the rotating arm and other components. The buffer structure can effectively reduce the vibration amplitude of the rotating arm caused by the impact force, and improve the stability and reliability of the rotating arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the practical buffer structure;

[0018] Figure 3 For this utility model Figure 1 Schematic diagram of the local enlarged structure at point A.

[0019] In the figure: 1. top cover plate; 2. rotating arm; 3. guide vane shaft; 4. collar; 5. connecting steel rod; 6. arc-shaped slide groove; 7. slide seat; 8. connecting seat; 9. top seat; 10. arc-shaped slide rod; 11. buffer spring; 12. through hole. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description of reference terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more schemes or examples.

[0025] like Figure 1 to Figure 3 As shown, the embodiment of the utility model provides a water guide mechanism of a water turbine, including a top cover plate 1:

[0026] The top cover plate 1 is provided with a plurality of through holes, in which a guide vane shaft 3 is rotatably inserted, the bottom end of the guide vane shaft 3 passes through the bottom end of the top cover plate 1 and is connected to a guide vane, and the top end of the guide vane shaft 3 is rotatably connected to a rotating arm 2;

[0027] The outer wall of each guide vane shaft 3 is fixedly sleeved with a ring 4 at a position above the top cover plate 1, and a connecting steel rod 5 is fixedly provided at the position of the outer wall of the ring 4. One end of the connecting steel rod 5 is fixedly connected to one side of the outer wall of the top seat 9, and a connecting seat 8 is fixedly provided at the bottom end of the top seat 9. A sliding seat 7 is fixedly provided at the bottom end of the connecting seat 8. The sliding seat 7 is slidably connected to the inside of the arc-shaped slide groove 6, and both sides of the inner wall of the arc-shaped slide groove 6 are fixedly connected to both ends of the arc-shaped slide rod 10. The arc-shaped slide rod 10 is interlaced and connected with the through hole 12, and both sides of the outer wall of the arc-shaped slide rod 10 are sleeved with buffer springs 11.

[0028] Specifically, one end of the two buffer springs 11 is fixedly connected to the inner wall of the arc-shaped slide groove 6 , and the other end of the two buffer springs 11 is in contact with the outer wall of the connecting seat 8 .

[0029] Specifically, the arc-shaped slide grooves 6 are evenly arranged on the top cover plate 1 , and each arc-shaped slide groove 6 is arranged with the guide vane shaft 3 as the center.

[0030] Specifically, the diameter of the sliding seat 7 matches the width of the arc-shaped sliding groove 6 .

[0031] Working principle: When the guide vane is impacted by water flow, the guide vane drives the guide vane shaft 3 to rotate, and the guide vane shaft 3 then drives the top rotating arm 2 to rotate. During the rotation of the rotating arm 2, the top seat 9 connected to one end of the steel rod 5 on the ring 4 rotates, and the top seat 9 slides on the arc-shaped slide groove 6 through the connecting seat 8 set at the bottom and the sliding seat 7 at the bottom of the connecting seat 8. The arc-shaped slide rod 10 supports the sliding of the connecting seat 8. During the deflection, the buffer spring 11 on the outer wall of the arc-shaped slide rod 10 plays a buffering role. Providing a buffer structure on the guide vane shaft 3 of the rotating arm 2 can reduce the radial impact force to the greatest extent, and can effectively reduce the vibration amplitude of the rotating arm 2 caused by the impact force, thereby improving the stability and reliability of the rotating arm 2.

[0032] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0033] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A water guide mechanism of a water turbine, comprising a top cover plate (1): The top cover plate (1) is provided with a plurality of through holes, in which a guide vane shaft (3) is rotatably inserted, the bottom end of the guide vane shaft (3) passes through the bottom end of the top cover plate (1) and is connected to a guide vane, and the top end of the guide vane shaft (3) is rotatably connected to a rotating arm (2); Features: The outer wall of each guide vane shaft (3) is fixedly sleeved with a collar (4) at a position above the top cover plate (1), and a connecting steel rod (5) is fixedly provided at the position of the outer wall of the collar (4). One end of the connecting steel rod (5) is fixedly connected to one side of the outer wall of the top seat (9), and a connecting seat (8) is fixedly provided at the bottom end of the top seat (9). A sliding seat (7) is fixedly provided at the bottom end of the connecting seat (8), and the sliding seat (7) is slidably connected to the inside of the arc-shaped slide groove (6). Both sides of the inner wall of the arc-shaped slide groove (6) are fixedly connected to both ends of the arc-shaped slide rod (10), and the arc-shaped slide rod (10) is inserted and connected with the through hole (12), and both sides of the outer wall of the arc-shaped slide rod (10) are sleeved with buffer springs (11).

2. A water guide mechanism for a water turbine according to claim 1, characterized in that: One end of the two buffer springs (11) is fixedly connected to the inner wall of the arc-shaped slide groove (6), and the other end of the two buffer springs (11) is in contact with the outer wall of the connecting seat (8).

3. The water guide mechanism of a water turbine according to claim 1, characterized in that: The arc-shaped slide grooves (6) are evenly arranged on the top cover plate (1), and each arc-shaped slide groove (6) is arranged with the guide vane shaft (3) as the center of the circle.

4. The water guide mechanism of a water turbine according to claim 1, characterized in that: The diameter of the sliding seat (7) matches the width of the arc-shaped sliding groove (6).

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