Hydraulic turbine with self-closing blades

FIELD: power engineering.

SUBSTANCE: hydraulic turbine with self-closing blades comprises a shaft and a row of identical blades, forming at least one impeller. Blades are connected with the shaft with the help of axes 2. All blades consist of a row of plates and a holder 13 of a rotation angle. Two rectangular plates are attached to the axis 2 installed on the shaft with the help of bearings. Two triangular plates are fixed to each of the lower and upper part of rectangular plates of the blade, and these plates are connected to each other and to rectangular plates with the help of axes and bearings. Inside the blade 7 there is a holder 13 of a rotation angle comprising a frame 22, which is rigidly connected to the axis 2 installed on the shaft. Along the frame 22 with the help of bearings there are levers moving with one end, being connected to each other with an axis, by other ends the levers are connected to appropriate rectangular plates with the help of hinged joints. Inside the frame 22 there are two springs installed in the corners.

EFFECT: reduced impact processes.

7 dwg

 

The invention relates to hydropower, and it can be used as a hydro power plant small, medium capacity, and even greater power when installing complex units.

Known turbine with self-closing blades /EN 2010125800 AND IPC F03B 17/06, published on 27.12.2011/containing the shaft, is attached to the axis of the blades, with the axes of the blades by means of a hinge plate attached to the upper and lower parts of the plates attached sash plate, interconnected and plates mounted on the axle, by means of hinges to the axis of the blade holder attached angle that contains a frame rigidly connected to the axis of the blade, on which one end of the moving levers, United shaft, while the other ends of the levers are connected by hinges to the plates of the blade the blade and shaft turbines are installed in the fluid flow vertically or horizontally.

The disadvantage of this turbine is a high wear and deformation of parts and components rotor blades, due to the shock processes when opening the blade.

The objective of the invention is to provide a turbine with self-closing blades in the implementation to achieve the technical result consists in the reduction of shock processes.

This technical cut ltat is achieved by what turbine with self-closing blades includes a shaft and a number of identical blades, which form at least one impeller, the blades connected to the shaft by means of axes and consist of a series of plates and holder angle, with two rectangular plate attached to an axis that is installed on the shaft by means of bearings, the lower and upper rectangular plates with blades attached two triangular plates, which are interconnected and rectangular plates using axes and bearings inside the blade holder has angle that contains a frame, which is rigidly attached to the axis mounted on the shaft on the frame by means of bearings at one end moved the levers, which are connected by the axis, the other ends of the levers connected to the respective rectangular plates with hinges, inside the frame at the corners are two springs.

Figure 1 shows the "impeller" of the turbine, the arrows show the direction of fluid flow.

Figure 2 shows a wind turbine blade, front view.

Figure 3 shows a turbine blade, cut along a-a in the closed state.

Figure 4 shows a wind turbine blade, top view.

Figure 5 shows a blade of the turbine, ventral view, arrows dormancy is the result of the direction of fluid flow.

Figure 6 shows the carrier levers angle.

Figure 7 shows the holder angle.

The turbine includes a shaft 1, which using the same axis 2 perpendicular to installed blades 3, 4, 5, 6 (figure 1). Four blades 3, 4, 5, 6, installed on the shaft 1, form a "working the wheel" (figure 1). Each subsequent set "impeller" is shifted in the direction of rotation of the shaft 1 at an angle relative to the first "impeller", depending on the technical parameters of the turbine, such as smoothness. For example, in figure 1 "impeller" is formed by the blades 3, 4, 5, 6, which are mounted with a shift angle θ=90° in the direction of rotation of the shaft 1 (figure 1), relative to the previous blade, thereby maintaining the maximum power flow-pressure fluid exerted on one blade, such as blade 3.

The blades 3, 4, 5 and 6 turbines are identical, so a description of one of the blades, such as blade 3.

The blade 3 is assembled structure consisting of interconnected plates 7, 8, 9, 10, 11, 12 and the holder 13 of the angle of rotation (figure 2, 3, 4, 5). For fixing the blades 3 axis 2, are the washers 14 and 15, limiting the moving blade 3 along axis 2 (figure 3). Plates 7 and 8, a rectangular shape, one side attached to the axle 2 by means of bearings rolling or skidding pad is Oia, for turning on an axis 2 (figure 3). To the lower part of the blade 3 is closer to the shaft 1, to the plates 7 and 8 attached triangular plates 11 and 12 by means of bearings and axles 19, 20, respectively (figure 2, 3, 5). Plates 11 and 12 are interconnected by means of bearings and axis 21 (2, 5). To the upper part of the blade 3, the most distant from the shaft 1, to the plates 7 and 8 attached to a triangular plate 10 and 9 by means of bearings and axles 16, 17, respectively (figure 2, 3, 4). Plates 10 and 9 are interconnected by means of bearings and axle 18 (Fig 2, 4). Thus, in the open position the blade 3 will have, for example, the shape of the bucket, and in a closed - box.

To balance the pressure plates 7 and 8 coming from the fluid flow, and also to hold the blade 3 perpendicular to the flow (figure 5) is the holder 13 of the angle of rotation (figure 2, 3). The holder 13 of the angle of rotation is made in the shape of a frame 22 mounted between the plates 7, 8-in blade 3 and is rigidly connected to the axle 2 (3, 7). Inside the frame 22, by means of bearings 23, moved the levers 24 and 25 (figure 2, 3, 6, 7)connected at one end between the axis 26 (figure 2, 3, 7). Thus, the movement of the levers 24, 25 is limited only along the frame 22. The other end of the lever 24 is connected to the plate 7 by means of hinge 28 (figure 2, 3, 6), the lever 25 is connected to the plate 8 by means of a hinge 29 (2, 6), holding lopas the ü perpendicular to the fluid flow (figure 5). To reduce the impact of processes that occur at the opening of the blades 3 of the turbine, inside the corners of the frame 22 has two springs 27 (Fig 3, 7), which is the damper.

Turbine with self-closing blades works as follows. Under the influence of fluid flow as shown by arrows (1, 5), on the front part of the blade 3, it starts to open (figure 2). After opening, the blade 3 by means of axis 2, is installed on the shaft 1 of the turbine, transmits the pressure force from the inner walls of the blade 3 to the shaft 1, which comes into rotation.

When opening the blade 3, plate 7, 8, 9, 10, 11, 12 will prevent the movement of fluid flow, turbulence occurs. The pressure at the front of the blade 3 will be increased, and on the other lowered. This results in a sharp blow of the liquid at the front of the blade 3. The abrupt opening of the blade 3 leads to impact processes at the nodes and components, increasing the wear and deformation. To reduce the shock processes are spring 22 (Fig 3, 7), which soften the impact of the fluid on the front of the blade 3, and make opening the blade 3 smoother.

Since the pressure of the fluid flow is not evenly presses on the plate 7, 8, 9, 10, 11, 12, due to non-uniform distribution of density and velocity of the fluid in the flow, to prevent turning of the blade 3 axis 2 is the holder 13 at the La rotation, who holds the levers 24, 25 and the frame 22 of the plates 7, 8.

The blade 5, located on the other side of the shaft 1 from blade 3 (Fig 1), will experience the pressure of fluid flow on the back, which will ensure its closing, thereby creating a minimum resistance to fluid flow. The blades 4, 6 operate in the same manner.

Turbine with self-closing blades containing a shaft and a number of identical blades, which form at least one impeller, the blades connected to the shaft by means of axes and consist of a series of plates and holder angle, with two rectangular plate attached to an axis that is installed on the shaft by means of bearings, the lower and upper parts of rectangular plates with blades attached two triangular plates, which are interconnected and rectangular plates using axes and bearings inside the blade holder has angle that contains a frame, which is rigidly attached to the axis mounted on the shaft on the frame by means of bearings at one end moved the levers, which are connected by the axis, the other ends of the levers connected to the respective rectangular plates with hinges, inside the frame at the corners are two springs.



 

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