阅读说明：本技术 一种转浆式水轮机桨叶操作机构 (Paddle operating mechanism of Kaplan turbine ) 是由 王怀平 于 2019-10-10 设计创作，主要内容包括：本发明公开了一种转浆式水轮机桨叶操作机构,包括转轮体,在所述转轮体上设置有至少三个叶片,在所述转轮体内设置有与叶片连接的摇臂,在所述转轮体中心设置有带有滑块的活塞机构,所述滑块与摇臂连接,在所述活塞机构中心设置有操作油管,在所述活塞机构两端设置有分别与转轮体连接的短轴和主轴。本发明具有结构设计巧妙、使用可靠、成本低廉的优点,同时,它能够使得浆叶运动轨迹在预定范围有限开放；减少了摩擦副,传动效率更高；减少水轮机转动部分零件数的设置；所占结构空间缩小,使得结构更加紧凑；转轮体由内外双层简化为只有外层,降低了铸造、加工难度；缩短设计、制造周期,降低了成本。(The invention discloses a paddle operating mechanism of a Kaplan turbine, which comprises a runner hub, wherein at least three blades are arranged on the runner hub, a rocker arm connected with the blades is arranged in the runner hub, a piston mechanism with a slide block is arranged in the center of the runner hub, the slide block is connected with the rocker arm, an operating oil pipe is arranged in the center of the piston mechanism, and a short shaft and a main shaft which are respectively connected with the runner hub are arranged at two ends of the piston mechanism. The invention has the advantages of ingenious structural design, reliable use and low cost, and can ensure that the motion trail of the blade is limited and opened in a preset range; the friction pair is reduced, and the transmission efficiency is higher; the number of parts of the rotating part of the water turbine is reduced; the occupied structural space is reduced, so that the structure is more compact; the runner body is simplified from an inner layer and an outer layer into only the outer layer, so that the casting and processing difficulty is reduced; the design and manufacture period is shortened, and the cost is reduced.)

1. The utility model provides a paddle operating mechanism of a Kaplan turbine, includes runner hub (1) be provided with at least three blade (2), characterized by on runner hub (1): the impeller is characterized in that a rocker arm (3) connected with blades (2) is arranged in the impeller body (1), a piston mechanism with a sliding block (4) is arranged at the center of the impeller body (1), the sliding block (4) is connected with the rocker arm (3), an operation oil pipe (5) is arranged at the center of the piston mechanism, and a short shaft (6) and a main shaft (7) which are respectively connected with the impeller body (1) are arranged at two ends of the piston mechanism.

2. The Kaplan turbine blade operating mechanism as claimed in claim 1, wherein: the piston mechanism comprises a piston groove body (8), the sliding block (4) is arranged on the piston groove body (8), a right piston (9) connected with the piston groove body (8) is arranged on the right side of the piston groove body (8), and the main shaft (7) is arranged on the outer side of the right piston (9).

3. The Kaplan turbine blade operating mechanism as claimed in claim 2, wherein: the outer wall of the piston groove body (8) is provided with a sliding groove (10), and the sliding block (4) is arranged in the sliding groove (10) and can move along the sliding groove (10).

4. a Kaplan turbine blade operating mechanism as claimed in claim 3, wherein: the piston groove body (8) is triangular, and three sliding grooves (10) are uniformly arranged on the piston groove body (8); the number of the sliding blocks (4) is three, and the three sliding blocks (4) are respectively positioned in the three sliding grooves (10); the sliding grooves (10) are respectively connected with the corresponding rocker arms (3) through pins.

5. A Kaplan turbine blade operating mechanism as claimed in claim 3, wherein: the piston groove body (8) is square, and four sliding grooves (10) are uniformly arranged on the piston groove body (8); the number of the sliding blocks (4) is four, and the four sliding blocks (4) are respectively positioned in the four sliding grooves (10); the sliding grooves (10) are respectively connected with the corresponding rocker arms (3) through pins.

6. the Kaplan turbine blade operating mechanism as claimed in claim 4 or 5, wherein: a positive thrust bearing and a negative thrust bearing (11) are arranged on the side surface of the rotating wheel body (1) and positioned between the rotating wheel body (1) and the blades (2) and between the rotating wheel body and the rocker arms (3); the blade sealing structure is characterized in that a blade seal (12) is arranged on one side of the upper portion of the forward thrust bearing (11) and between the rotating wheel body (1) and the blade (2), a sealing gland (13) is arranged on the upper end face of the blade seal (12), and the sealing gland (13) is connected with the rotating wheel body (1).

Technical Field

The invention relates to a Kaplan turbine, in particular to a blade operating mechanism of the Kaplan turbine.

Background

At present, a three-blade double-piston L-shaped sliding block type operating mechanism of a runner of a Kaplan turbine is arranged in a runner body of a rotating part of a machine set, is a specific structure for realizing expected functions in a given limited space, and is very important for reasonably utilizing the limited space to the maximum extent.

The existing paddle operating mechanisms are two types compared with the traditional paddle operating mechanisms, one type is that a double-acting piston (piston moving) is matched with an operating frame with an ear handle at one end, and then a connecting rod drives a paddle rocker arm; the other double-acting piston cylinder (the movable piston of the cylinder is not movable) is provided with an ear handle fork head directly at one side end, and a blade rocker arm is driven by a connecting rod. Two typical paddle operating mechanisms are difficult and complicated in design, the main supporting part of the paddle operating mechanism is a runner body which is double-layer, the casting and processing manufacturability is not good, and the problem is particularly prominent particularly in small and medium-sized Kaplan turbines with small sizes, and the design of the Kaplan mechanism can hardly be completed.

disclosure of Invention

The invention aims to provide a paddle operating mechanism of a Kaplan turbine, which has simple structure and high transmission efficiency and can ensure that the motion trail of a paddle is limited and opened in a preset range.

The invention aims to realize the technical scheme that the paddle operating mechanism of the Kaplan turbine comprises a runner hub, wherein at least three blades are arranged on the runner hub, a rocker arm connected with the blades is arranged in the runner hub, a piston mechanism with a slide block is arranged in the center of the runner hub, the slide block is connected with the rocker arm, an operating oil pipe is arranged in the center of the piston mechanism, and a short shaft and a main shaft which are respectively connected with the runner hub are arranged at two ends of the piston mechanism.

The piston mechanism comprises a piston groove body, the sliding block is arranged on the piston groove body, a right piston connected with the piston groove body is arranged on the right side of the piston groove body, and the main shaft is arranged on the outer side of the right piston.

Further, a sliding groove is formed in the outer wall of the piston groove body, and the sliding block is arranged in the sliding groove and can move along the sliding groove.

In the invention, the piston groove body is triangular, and three sliding grooves are uniformly arranged on the piston groove body; the number of the sliding blocks is three, and the three sliding blocks are respectively positioned in the three sliding grooves; the sliding grooves are respectively connected with the corresponding rocker arms through pins.

Or the piston groove body is square, and four sliding grooves are uniformly distributed on the piston groove body; the number of the sliding blocks is four, and the four sliding blocks are respectively positioned in the four sliding grooves; the sliding grooves are respectively connected with the corresponding rocker arms through pins.

In order to ensure sealing, a positive thrust bearing and a negative thrust bearing are arranged on the side surface of the rotating wheel body and are positioned between the rotating wheel body and the blades as well as between the rotating wheel body and the rocker arm; and a blade seal is arranged on one side of the upper part of the positive and negative thrust bearing and between the runner hub and the blades, and a seal gland is arranged on the upper end surface of the blade seal and connected with the runner hub.

By adopting the technical scheme, the invention has the advantages of ingenious structural design, reliable use and low cost, and simultaneously has the following advantages:

1. The blade motion track can be opened in a limited way in a preset range;

2. The friction pair is reduced, and the transmission efficiency is higher;

3. The number of parts of the rotating part of the water turbine is reduced;

4. The occupied structural space is reduced, so that the structure is more compact;

5. The runner body is simplified from an inner layer and an outer layer into only the outer layer, so that the casting and processing difficulty is reduced;

6. The design and manufacturing period is shortened, and the cost is reduced;

7. The paddle operating mechanism is arranged in the rear, so that the rotating part of the cantilever can be shortened, the mechanical model becomes excellent, and the running stability of the unit is improved;

8. The supporting mode of the blades of the water turbine is improved, the structure of the rear runner body is optimized, and the problem that the small-size axial flow water machine realizes the operation of the rotating propeller is solved.

drawings

Detailed Description

The following detailed description of the embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments will still fall within the scope of the present invention claimed in the claims.