Riverbed all-season hydraulic power plant

FIELD: power engineering.

SUBSTANCE: riverbed hydraulic power plant comprises an impeller installed on vertical stands 1 of a base 2 and comprising a shaft 3 with radial drivers 6 and rectangular blades 8, a multiplier with a shaft and a generator. The upper part of rectangular blades 8 is installed hingedly on fluoroplastic bushings at the ends of drives 6. In the side ends of the lower part of the blades 8 there are rollers 9 that roll in guides of -shaped form of fixed sides 10 that are bean-shaped. Guides in the front part have a break or are made as closed with a transition section from the horizontal position of the blades 8 into the vertical one. Blades 8 are made of polymer material. The multiplier's shaft is made vertical.

EFFECT: simplified design of the riverbed hydraulic power plant with higher reliability of operation and increased capacity due to serial connection of hydraulic power units.

2 cl, 8 dwg

 

The invention relates to hydropower, in particular, for energy conversion channel the flow of water into electrical energy.

Known for small and micro hydro power plants with a capacity of 1...5000 kW at pressure 2...400 m from the propeller, diagonal, axial, radial-axial, bucket turbines [http://ovis.khv.ru/index 2...].

The drawback of such HPP is the need for large elevation or the construction of the dam.

Known gidroenergoproekt containing installed on the shaft of the impeller with the blades and the mechanism of their rotation, made in the form of a system of mobile and fixed relative to the axes of the sprockets with a gear ratio of 2:1, connected by a chain transmission (RF patent No. 2016220, IPC F03 7/00).

Chain transmission running in the water, and the durability and reliability of its low.

Known turbine for run-of-river hydropower plant, containing a shaft mounted on two supports and two opposing rectangular blade, placed at equal distance from the shaft at the ends of the carrier and rotatable around its axis by means of the drive mechanism, consisting of cylindrical gears (RF patent No. 2131994 C1 IPC F03 7/06, 7/00, publ. 20.06.1999, prototype)

The disadvantage of this turbine is the small size of the blades, due to the dependence on the size of the gears of the drive mechanism and, therefore, small power GI is aturbine.

The objective of the invention is to simplify the design run-of-river hydropower plant with increased reliability and increased power due to the serial connection of gidroenergoproektom.

This object is achieved in that run of river hydropower plant containing the impeller, mounted on vertical posts of the base and consisting of a shaft with radial measured including carriers and rectangular blades, the multiplier with the shaft and the generator according to the invention, the upper part of the rectangular blades pivotally mounted on Teflon bushings at the ends of the carrier, and at the lateral ends of the lower part of the blades mounted rollers, rolling on rails- shaped stationary side bean-shaped, with the guides in the front have the gap closed or completed with a transition area from the horizontal position of the blades in the vertical, the blades are made of polymer material, and the shaft of the multiplier is made vertical.

In addition, the polymer of the blade wheels in cross-section for rigidity have a corrugated shape, and the upper and lower parts thereof are bent in the form of a pipe.

Figure 1 shows a side view of the wheel of the hydropower plant, figure 2 is a front view of the wheel in the section a-a from figure 1; figure 3 - increase the Noah local section I of figure 2; figure 4 is an enlarged partial section II of figure 2; figure 5 is a transverse cross-section B-B of the blade wheel; figure 6 is a longitudinal section In the blade; 7 - the shape of the guide and diagram of the forces on the blade; Fig diagram of the run-of-river hydropower plant.

On racks 1 base 2 has a shaft 3 hydropower wheel rotating on Teflon bushings 4. On the shaft is rigidly fixed to the two hubs 5 radially arranged carrier 6. Head of identically positioned drove interconnected axes 7, which is inserted the blade 8, in two remote from the axis, the ends of which in the end set the guide rollers 9, rolling over- shaped track two rails of the side walls 10, secured to the uprights 1 and having a complex shape. Section hydropower wheels interconnected couplings 11. The axis 7 is composed of pipe sections 12, the ends of which are rigidly fixed to the axle 13, the ends of which are inserted with a clearance into the hole of the head 14 of the carrier 6 with PTFE sleeve 15 and is fixed against axial displacement by a washer 16 with a cotter pin or other means. At the end of the tubular lower end 18 of the blade is rigidly inserted pin 19, fluoroplastic sleeve 20 which is mounted a roller 9. The blade 8 is made of a rigid polymeric material, the middle has a corrugated shape 2, and the ends made in the form of tubes 18 and 22. Cam track 23 of the side walls 10 of the roller 9 in the front part may have a gap 24 (Fig 1) or be closed (Fig.7) with a transition area 25 from the horizontal position of the blades in the vertical.

The radius of the transition area MN 25 less than the value ofthe blades 6...10 mm (Rpis the radius of the roller 9).

To transfer the received hydropower wheels torque on the generator 26 is conical gear 27, a vertical shaft 28 and the multiplier 29.

Wheel unit mounted below the lower level of the ice (∇ ZERO) in the winter.

Run of river hydropower plant works as follows.

The flow of water acts on the blades of the wheel, perpendicular to the flow. The position of the blades of the wheels, fixed guides is that they pass on the shaft maximum torque M In provisions (7) blade:

,

where ρ is water density, H is the height of the blade, the width of the blade. υin- the rate of flow of water, νC1- circumferential speed of rotation of the blades, R is the radius (length) was taken.

,

where ω is the angular velocity of rotation of the wheel.

2-M2=F2R2; 3-M3=F3R3; 4-M4=F4R4; 5-M5=F5Rsub> 5=0; 6-M6=F6R6;

7-M7=F7R7; 8-M8=F8R8.

The total torque

The total capacity without taking into account the friction of the mating parts

,

where n is the rotational speed.

On a plot of MN under the weight of the blade change position from horizontal to vertical, i.e., the blade suddenly turns (falls) in the heads were taken. In the lower part of the roller blade rolling guide- shaped. When moving up from the bottom position, the distance between the heads were taken and the guide gradually decreases, as a consequence, the blades are at an angle to the water flow. Not reaching the top on the section 4 (7), the transition occurs roller blades with the inner contour of the guide shelves on the outside. The sidewall with the guides has a bean-shaped form. The connection of the several wheels with clutches makes it possible to considerably increase the capacity of the hydropower plant.

The proposed hydropower plant has a simple structure, high reliability due to manufacture parts and assemblies made of polymeric materials and can work in all seasons.

1. Run of river hydropower plant containing the impeller, set the run on vertical posts of the base and consisting of a shaft with radial measured including carriers and rectangular blades, the multiplier with the shaft and the generator, characterized in that the upper part of the rectangular blades pivotally mounted on Teflon bushings at the ends of the carrier, and at the lateral ends of the lower part of the blades mounted rollers, rolling on rails-shaped stationary side bean-shaped, with the guides in the front have the gap closed or completed with a transition area from the horizontal position of the blades in the vertical, the blades are made of polymer material, and the shaft of the multiplier is made vertical.

2. Installation according to claim 1, characterized in that the polymer of the blade wheels in cross-section for rigidity have a corrugated shape, and the upper and lower parts thereof are bent in the form of a pipe.



 

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