CN202732195U - Movable guide vane structure with big discs on two sides of guide vane - Google Patents

Abstract

The utility model relates to a movable guide vane structure with large discs on both sides of the guide vane body, which is applied to a water guide mechanism of a water turbine. It includes the guide vane body and the central shaft and the lower shaft which are integrally connected on both sides of the guide vane body; the characteristic is that between the guide vane body and the central shaft, a fixed The central axis and the lower axis are concentric with the large disk I and the large disk II of the central axis, and each large disk transitions continuously and smoothly from the edge to be tangent to the surface of the guide vane body. It has the following advantages: greatly delaying the wear of the matching parts of the top cover and the bottom ring, prolonging the service life of the top cover and the bottom ring; effectively avoiding the leakage of water caused by the increased wear, and improving the hydraulic pressure of sand The utilization rate of resources significantly increases the benefit of the power station.

Description

The movable guide vane structure with large discs on both sides of the guide vane body

technical field

The utility model relates to a movable guide vane structure with large discs on both sides of the guide vane body, which is applied to a water guide mechanism of a water turbine.

Background technique

my country has a vast territory and abundant water resources, ranking first in the world. However, the sediment content of rivers is very high, especially the Yellow River. At present, the Yangtze River has also become a sediment-rich river, and the sediment load of other major rivers is also gradually increasing. In addition, our country is a country with a monsoon climate. When the river runoff is large every year, that is, when the water resources are abundant, the content of sediment carried by the river also increases greatly. In my country, nearly 40% of the turbines in hydropower plants in operation are suffering from different degrees of abrasive damage, which has become an important technical problem to be solved urgently by the hydropower sector.

In the structural design of the units of the silt-rich power station, some structures that work well in the clean water power station can no longer fully adapt to the silt-rich power station; the movable guide vane in the water guide mechanism of the turbine is a very critical and important part. During the operation of the unit, it is often rotated to adjust the load of the unit. Therefore, the structural design of the movable guide vane plays a vital role in the service life of the unit.

In the current structural design of the movable guide vane, there is only a small transition cylinder connected to the middle and lower shaft sleeves on both sides of the movable guide vane body, and some are directly connected to the middle and lower shaft sleeves without a transition section. Such a structure will make the sand grains easily enter the matching parts of the movable guide vane, the top cover and the bottom ring, and wear here, thereby greatly shortening the service life of the movable guide vane, the top cover and the bottom ring.

Contents of the invention

The purpose of this utility model is to provide a movable guide vane structure with large discs on both sides of the guide vane body which increases the difficulty of sand entering the matching part of the top cover and the bottom ring and reduces the wear on the matching part.

The utility model can be realized through the following technical solutions: the movable guide vane structure with large discs on both sides of the guide vane body, including the guide vane body and the central shaft and the lower shaft integrally connected to both sides of the guide vane body; The feature is that between the guide vane body and the central shaft, between the guide vane body and the lower shaft, a large disc I and a large disc II that are concentric with the central shaft and the lower shaft are respectively fixed, and each large disc Continuous, smooth transition from edge to tangent to vane body surface.

The utility model has the following advantages:

The wear of the matching parts of the top cover and the bottom ring is greatly delayed, and the service life of the top cover and the bottom ring is prolonged. It effectively avoids the leakage of water caused by increased wear, improves the utilization rate of sandy hydraulic resources, and significantly increases the benefits of the power station.

Description of drawings

Accompanying drawing 1 is the utility model front view.

In the figure, 1 is the central shaft, 3 is the guide vane body, 5 is the lower shaft, 7 is the big disc II, and 9 is the big disc I.

Fig. 2 is a plan view of Fig. 1 .

In the figure, 1 is the central shaft, 3 is the guide vane body, 5 is the lower shaft, 7 is the big disc II, and 9 is the big disc I.

Fig. 3 is the right side view of Fig. 1 after removing the lower shaft.

3 among the figure is guide vane body, and 7 is big disc II.

Fig. 4 is a left view of Fig. 1 after removing the central shaft.

3 among the figure is guide vane body, and 9 is big disk I.

Detailed ways

The utility model is described further below in conjunction with accompanying drawing. The movable guide vane structure with large discs on both sides of the guide vane body comprises a guide vane body (3) and a central shaft (1) and a lower shaft (5) integrally connected to both sides of the guide vane body. The improvement of the utility model is that between the guide vane body (3) and the middle shaft (1), between the guide vane body (3) and the lower shaft (5), respectively add and fix a The large disk I (9) and the large disk II (7) on the central axis, each large disk transitions continuously and smoothly from the edge to be tangent to the surface of the guide vane body.

In use, the utility model is installed vertically, the central shaft (1) is on the top, the lower shaft (5) is on the bottom, and the guide vane body (3) is placed in flowing water. Because the flowing water passes between the big disc Ⅰ (9) and the big disc Ⅱ (7), the sediment flows from the two big discs due to the continuous and smooth surface between the two big discs. The radial flying out effectively prevents the sediment from moving axially. Thereby avoiding the installation of the equipment of the present utility model at the positions where the center shaft (1) and the lower shaft (5) are connected to be eroded by the silt entrained by the flowing water, prolonging the service life of the top cover and the bottom ring . The water leakage caused by abnormal wear and tear caused by sediment erosion is avoided, the utilization rate of sandy hydraulic resources is improved, and the benefit of the power station is obviously increased.

Claims (1)

1. The movable guide vane structure with large discs on both sides of the guide vane body, including the guide vane body (3) and the central shaft (1) and lower shaft (5) integrally connected to both sides of the guide vane body; its characteristics It is between the guide vane body (3) and the central shaft (1), and between the guide vane body (3) and the lower shaft (5), respectively add and fix a large disc I with the central axis of the central shaft and the lower shaft (9) and the large disk II (7), each large disk transitions continuously and smoothly from the edge to be tangent to the surface of the guide vane body.

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