RU2291985C1 - Surf hydraulic power station - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: power station comprises underwater wave-receiving blade mounted for permitting rocking around the axle, hydraulic pump, and fluid-operated motor provided with electric generator. The wave-receiving blade is provided with the hydraulic accumulator built in its intermediate section and drain tank. The hydraulic pump is provided with the diaphragm and has two ways. The flexible diaphragms are arranged from the outsides of the wave-receiving blade.

EFFECT: enhanced reliability.

3 dwg

Description

The invention relates to hydropower, in particular to the use of the energy of the surf stream near the shores of the seas, oceans and large reservoirs by converting it into electricity.

A surf hydroelectric power station is known which comprises a blade, partially submerged in water, swaying around a horizontal axis, and a piston pump located above the water level, a hydraulic turbine and an electric generator. The blade is kinematically connected to the piston of the pump using a shaft mounted on it with a lever and crank. The pump is connected via pipelines to a pond and a hydraulic turbine. Under the action of the surf flow, the blade deviates and through the shaft, lever and crank drives the piston pump. The backward flow of the blade deviates to its original position.

The disadvantage of this device is the complexity of its kinematic scheme and low reliability in operation.

There is also known a prototype surf hydroelectric power station (No. 2009367, publ. 10.10.2000, BI No. 28, 2000), containing a wave receiving blade mounted with the possibility of swinging about the axis, a piston pump and a hydraulic turbine (hydraulic motor) with an electric generator, the blade and the piston pump is located below the water level and installed with the possibility of swinging around the vertical axes, and the working surface of the blade is made variable with the help of a power hydraulic cylinder.

The disadvantage of the described hydroelectric power station is the design complexity, the need to install seals on the piston pump and the intermittent supply of working fluid to the hydraulic motor, associated with the nature of the piston pump, which complicates the industrial generation of electricity.

The invention solves the problem of simplifying the design of a hydroelectric power station, increasing the reliability of its operation and making industrial power generation possible.

The required technical result is achieved by the fact that in a known hydroelectric power station containing a wave receiving blade located under water, mounted with the possibility of swinging around the axis, a hydraulic pump and a hydraulic motor with an electric generator, the wave receiving blade is proposed to be carried out with a hydraulic accumulator and a drain tank integrated in its middle part, and a hydraulic perform the pump with diaphragm and double-sided. Elastic membranes are proposed to be located on the outer sides of the wave receiving blade.

An example of the implementation of a hydroelectric power station is shown in the drawings, where Fig. 1 shows a general view from the side of the impact of the surf stream; figure 2 is a section along aa of figure 1; figure 3 is a simplified hydraulic circuit of the device. The following conventions are adopted in the drawings:

1 - discharge hydraulic line;

2 - hydraulic motor;

3 - electric generator;

4 - hydraulic return line of the working fluid;

5 - transverse beam;

6 - a platform for installing a hydraulic motor and an electric generator;

7 - vertical support;

8 - pressure valve housing;

9 - housing of the suction valves;

10 - vertical axis;

11 - wave receiving blade;

12 - the shell of the accumulator, drain tank and diaphragm pumps;

13 - the inner walls of the wave receiving blade (walls of the accumulator and the drain tank);

14 - the cavity of the accumulator;

15 - elastic membrane;

16 - spring;

17 - discharge valve;

18 - the cavity of the diaphragm pump;

19 - a drain tank;

20 - suction valve.

The hydroelectric power station consists of two vertical supports 7 fixed in the surf zone at some distance from each other (Fig. 1), interconnected by two transverse beams 5 and one platform 6 for installing a hydraulic motor 2 with an electric generator 3. A wave receiving blade 11 is fixed to the beams 5 the possibility of its swing in a certain range around the vertical axis 10.

The wave-receiving blade 11 comprises a shell 12 (FIG. 2) with fixed inner walls 13, forming together with the shell a cavity of the accumulator 14 and a drain tank 19, separated by a horizontal partition (shown, but not indicated). The outer walls of the wave receiving blade 11 are made in the form of elastic membranes 15 of the membrane pump. The elastic membrane 15 can be made with springs 16, giving them additional elasticity, and without them. The inner walls 13 of the wave receiving blade 11 and its external elastic membranes 15 form the cavity 18 of the membrane pump. Suction 20 and discharge 17 valves can be placed both on the inner walls 13 (Fig. 2), and on the shell 12 in special housings 8, 9 (Fig. 1). The second option is preferable, as it allows for quick valve replacement.

Hydroelectric power works as follows. When the surf flow influences the left diaphragm 15 (Fig. 2), it bends towards the inner rigid wall 13, the discharge valve 17 opens and the working fluid from the cavity 18 of the left diaphragm pump flows under pressure into the hydraulic accumulator 14, from where it is supplied to the hydraulic motor via the hydraulic discharge pipe 1 2, the rotation of the shaft of which is transmitted to the electric generator 3. The working fluid is drained into the tank 19 via a hydraulic line 4. At the same time, the right membrane 15 bends under the action of elastic forces in the direction opposite to the walls ke 13, the suction valve 20 opens, the discharge valve 17 closes and the working fluid from the tank 19 fills the cavity 18 of the right diaphragm pump. Under the influence of a backward wave of the surf flow, the right diaphragm pump works for discharge, the left - for suction.

The increased pressure in the gas cavity of the accumulator 14 (P> P _at ) equalizes the flow of the working fluid to the hydraulic motor 2, thereby ensuring its uniform operation, as well as the stable operation of the electric generator 2.

It is the design of a hydroelectric power station in the form of one unit, including a wave receiving blade, two diaphragm pumps, a hydraulic accumulator and a drain tank that makes the design the simplest and most adapted to the reception of the energy of the surf stream and its transformation into energy of the pressure of the working fluid, and then into electricity.

Claims (1)

A bottom hydroelectric power station comprising a wave receiving blade mounted with the possibility of swinging around the axis, a hydraulic pump and a hydraulic motor with an electric generator, characterized in that the wave receiving blade is equipped with a hydraulic accumulator and a drain tank built in its middle part, and the hydraulic pump is made of a diaphragm and double-sided, moreover elastic membranes are located on the outer sides of the wave receiving blade.

Images