Hydropower plant

FIELD: power engineering.

SUBSTANCE: invention is related to designs of plants for transformation of air flow water course energy into electric energy. Hydropower plant comprises generator 1 and hydrodynamic drive 2, arranged in the form of two coaxially installed screws 5 and 6, which are arranged, in their turn, with the possibility of rotation in opposite directions and connected with generator 1 via facility of two shafts rotary motion transformation into rotary motion of single shaft. Transformation facility is arranged in the form of differential planetary multiplier. Generator 1 and transformation facility are installed in body 17, having joint 18, located in vertical plane, passing through center of masses, fixed on stand 19 and providing for possibility of rotation in horizontal and vertical planes, and cavity of generator 1 is sealed and filled with lubricating liquid and communicated to pressure compensator 21, which consists of cylinder 22 and spring-loaded piston 23.

EFFECT: invention is aimed at increase of plant efficient factor with reduction of its dimensions and simultaneous increase of power.

7 cl, 2 dwg

 

The invention relates to structures for converting the energy of the incoming flow of water into electrical energy.

Known hydropower plant with two screws rotating in different directions, connected by shafts respectively with the rotor and stator of the generator (see EN 93029865 AND 27.08.1995).

In this installation the stator of the generator rotates, which is a big drawback, since the stator must be placed in a fixed case designed for attachment to a support and output wires.

Known hydropower plant comprising a generator and a hydrodynamic drive, made in the form of two coaxial spaced screws, are, in turn, to rotate in opposite directions and connected to the generator through the means of converting rotational motion between two shafts into a rotary movement of one shaft (see SE 9600118 And, 17.07.1997, F03B 3/04).

The disadvantages of this plant are a limited capacity, small energy conversion efficiency, large size screws and a significant level of noise generated by the screw during the rotation.

The objective of the invention is to increase efficiency with the reduction of its size and increase in power.

This object is achieved in hydropower installation comprising a generator and a hydrodynamic drive, made in the form of two coaxial spaced screws, are, in turn, to rotate in opposite directions and connected to the generator through the means of converting rotational motion between two shafts into a rotary movement of one shaft, according to the invention a tool to convert rotational motion between two shafts into a rotary movement of a shaft made in the form of a differential planetary gear, generator and a means of converting rotational motion between two shafts into a rotary movement of a shaft accommodated in the housing with a hinge located in a vertical plane passing through the center of mass fixed on a stand and allowing rotation in horizontal and vertical planes, and the cavity of the generator is sealed and filled with lubricating fluid and communicates with pressure compensator, consisting of a cylinder and a spring-loaded piston. The hinge is made with limiter vertical rotation, protect propellers from damage to the rack. The generator housing on the side opposite the screws that attached the horizontal stabilizers and vertical position. On the stabilizer attached balance weights. The screws are designed with a variable pitch. The machine is equipped with a brake vnutrennih and outer shafts. Concentric with the screws installed the fairing.

The invention is illustrated by figure 1 and 2, where:

figure 1 - the hydropower plant,

figure 2 - shows the kinematic diagram of the hydropower plant.

Installation (1) comprises a generator 1 and is attached to the hydraulic actuator 2, consisting of the installed respectively on the inner and outer shafts 3 and 4 are front and rear screws 5 and 6 and connected to a means for converting rotational motion of the two shafts 7 a rotary motion of one shaft, namely, the shaft 8 of the generator 1. The screws 5 and 6 during operation rotate in different directions.

The preferred implementation of this conversion tool rotational motion between two shafts 3 and 4 into a rotary movement of a shaft 8 (Fig 1) in the form of the epicycle gear mechanism 9, for example, differential planetary multiplier, which, in turn, contains (1) the Central wheel 10, a sun wheel 11, satellites 12 mounted on a drive rod 13. Central wheel 10 is installed on the shaft 8 of the generator 1, which is fixed to the permanent magnets 14. The excitation winding 15 and the seat 16 mounted inside the housing 17.

The application of this scheme will reduce the diametrical dimensions of the screws 5 and 6, to increase their efficiency, to reduce the diameter of the installation is almost 1.5 times and to reduce the noise level, created by the screws 5 and 6.

To the body 17 of each of the generator 1 (2) in the area of the center of gravity CG is attached to the hinge 18, the other end of which is secured to the rack 19. The hinge 18 allows the rotation of the generator 1 in the horizontal plane and the rotation angle α in the vertical plane. The hinge 18 is delimited vertical turning 20. The use of the limiter vertical turning 20 prevents damage to the screws 5 and 6, the rack 19.

The cavity generator "And" filled with lubricating fluid and connected by a channel "B" with pressure compensator 21, consisting of a cylinder 22 and a spring-loaded piston 23. The pressure compensator 21 is designed to compensate for water pressure at great depths and compensation flow of lubricant through the seal. The pressure compensator 21 supported in the cavity "A" pressure higher than the ambient pressure. Hole "In the reports of the internal cavity "D" of the pressure compensator 21 with the environment.

The housing 17 is attached the horizontal stabilizers and vertical positions, respectively, 24 and 25. The horizontal stabilizers and vertical positions 24 and 25 allow the generator 1 to be guided strictly against the direction of water flow, which increases its efficiency. On the stabilizer 24 or 25 is fixed the balance weight 26 to align the center of gravity CG vertically with the plane, passing through the hinge 18. The machine is equipped with a brake 27 for braking the inner and outer shafts 3 and 4. The screws 5 and 6 (figure 2) contain not more than 2 blades 28 and is made with a variable pitch. Concentric with the screws 5 and 6 can be mounted fairing 29.

Installation mounted on a bracket 30 which, in turn, can be mounted on a support 31, is mounted, for example, on the bottom of the ocean.

During operation of the installation it is set in the area of permanent water flow. The water flow actuates the hydraulic actuator 2 (figure 1), i.e. the screws 5 and 6 through the means of converting rotational motion of the two shafts 7 a rotary motion of one shaft (shaft 8 generator 1), actuates the generator 1.

Produced electrical energy is supplied by electrical wires to the energy consumers (figure 1 and 2 is not shown).

If the direction of flow of water, the stabilizers 24 and 25 automatically adjust the installation of the axis of the generator 1 in the desired direction, which further increases the efficiency of the plant and its capacity. Fairing 29 prevents radial flow of water under the action of centrifugal forces and increases the efficiency of the installation.

The brake 27 is used to stop rotation of the shaft during maintenance works.

The use of the invention will:

1. To ensure high efficiency in the system through the use of two screws, control step of screws and applying fairing.

2. To get more power through the use of the screw maximum diameter possible to ensure that there was maximum flow of water, the application of the maximum angular velocity of rotation of the screws from the condition of strength, the use of the multiplier in order hydropower plant, with a minimum size, to have the maximum power.

3. To reduce the level of noise generated by the screws through the use of the fairing.

1. Hydropower plant comprising a generator and a hydrodynamic drive, made in the form of two coaxial spaced screws, are, in turn, to rotate in opposite directions and connected to the generator through the means of converting rotational motion between two shafts into a rotary movement of one shaft, characterized in that the means of converting rotational motion between two shafts into a rotary movement of a shaft made in the form of a differential planetary gear, generator and a means of converting rotational motion between two shafts into a rotary movement of a shaft accommodated in the housing with a hinge located in a vertical plane passing through the center of mass fixed on the rack and provides the option of turning in the horizontal and vertical planes, and the cavity of the generator is sealed and filled with lubricating fluid and communicates with pressure compensator, consisting of a cylinder and a spring-loaded piston.

2. Hydropower plant according to claim 1, characterized in that the hinge is made with limiter vertical rotation, protect propellers from damage on the rack.

3. Hydropower plant according to claim 1 or 2, characterized in that the generator housing on the side opposite the screws that attached the horizontal stabilizers and vertical position.

4. Hydropower plant according to claim 3, characterized in that the stabilizer is fixed load balancing.

5. Hydropower plant according to claim 3, characterized in that the screws are designed with a variable pitch.

6. Hydropower plant according to claim 3, characterized in that it is equipped with a brake inner and outer shafts.

7. Hydropower plant according to claim 3, characterized in that the concentric screws installed the fairing.



 

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