Unit for tidal flow energy utilisation

FIELD: power industry.

SUBSTANCE: invention refers to hydro power engineering. Device utilising tidal flow energy includes rotor 1 consisting of spiral vanes with segmented profile, attached by cross-beams to the shaft, and generator mounted on a platform and connected to the rotor. Lower end of rotor 1 shaft and generator connected to it are placed in a sealed capsule 2. Sealed capsule 2 rests on two bearing beams 4 with the help pf two pins 3 protruding from opposite sides of outer capsule surface and can rotate around horizontal axis perpendicular to the flow direction. Bearing beams 4 are attached to cylindrical cases 5, the ends of which are interconnected by braces 7 with segment-shaped cross-section turned with its convexity down and forming α angle to the horizon to produce lifting power directed towards the bottom.

EFFECT: simplified design, extended application range covering water areas of large-capacity navigation and ice cover.

4 dwg

 

The invention relates to the field of power engineering and is intended for use tidal energy marine currents.

Known installation for the energy of the tidal currents of the company Hammerfest Strom, was put into trial operation in Scotland in 2012, consisting of a capsule unit Kaplan turbine, located at the top of a frame made of pipes, installed on the seabed (http://www.hammerfeststrom.com/ HS 1000 installed in Orkney). The axis of the hydraulic unit is oriented in the flow direction. The depth of the seabed is selected from the conditions of navigation.

The disadvantages of this setup are: the complexity of the design Kaplan turbine, reducing its effectiveness at the location of the turbine downstream relative to the supporting structure, the necessity of using a large floating crane lifting capacity when mounting and dismantling the installation.

Known installation independent of flow direction and comprising a rotor comprising a vane segment profile, made in the form of a spatial spiral traverses United with the shaft, the axis of rotation which is at an angle close to direct, in relation to the flow direction, the lower end of the shaft is connected for rotation with the platform, and mounted on a generator, based on fundame�t can be tilted in any direction (patent RF №2461733, IPC: F03D 5/00, publ. 20.09.2012.

By the greatest number of similar features and the achieved result of this technical solution chosen as a prototype of the claimed invention.

The disadvantages of the prototype, does not help to achieve the goal, are: the need for installation on a massive Foundation to prevent overturning and shear from the effects of flow, the presence of the host that provides the tilt rotor installation in any direction, the presence of elastic elements for shockless change of inclination of the rotor when the direction of the current.

The technical task of the invention is to simplify the design, reduce the cost during manufacturing, installation and operation of the installation.

To achieve the said technical result in the installation of energy in tidal currents, comprising a rotor consisting of a helical blade segment profile, bonded traverses with the shaft, and connected with it by a generator mounted on the platform, the lower end of the rotor shaft and connected with it the generator is placed in a sealed capsule, which by means of two trunnions projecting from opposite sides of its exterior surface supported rotatably around a horizontal axis, perpendicular to the flow direction, two support beams, skreplennyi� with cylindrical housings, end of which is connected between a connecting beams with a cross section in the form of a segment which is convex downward and forming with the horizon an angle α that provides the appearance of a lifting force directed towards the bottom.

The distinctive features of the present invention is the placement of the lower end of the rotor shaft and connected to a generator in a sealed capsule, sealed bearing capsules by means of two trunnions projecting from opposite sides of its exterior surface rotatably around a horizontal axis, perpendicular to the flow direction, two support beams, the fastening rails with cylindrical housings, the extremity of which is connected between a connecting beams with a cross section in the form of a segment which is convex downward and forming with the horizon an angle α that provides the appearance of a lifting force directed towards the bottom.

Thanks to these characteristics, expanding the scope of the proposed facility, which included the waters with bulk shipping and covered by ice.

The proposed plant for the energy of tidal currents is illustrated by the drawings shown in figs.1-4.

Fig.1 shows a side view, combined with a slit of the support and soedinitel�x beams.

Fig.2 - view of the apparatus from above.

Fig.3 - section a-A view of the connecting beam.

Fig.4 is a front view of the connecting beam.

Installation for the energy of tidal currents comprises a rotor 1, a sealed capsule 2, two axles 3, rails 4, the cylindrical casings 5, 6 pylons streamlined shape, the connecting beam 7, an external ballast 8.

The proposed device operates as follows.

Manufactured at the shipyard installation tug assistance is delivered to the work place and oriented in the flow direction. Then the cylindrical housings 5 are uniformly filled with water to prevent rolling and tipping, which also contributes to the suspension of external ballast 8, resulting in the proposed plant sits on the bottom.

An electrical cable connected to the unit, is laid to the shore, removed the device for locking the rotor 1 is in a vertical position during towing and immersion installation on the bottom.

Upon reaching tidal over a certain speed of the rotor 1 together with a sealed capsule 2 by turning on a pin 3 mounted rotatably on the mounting rails 4 connected with the cylindrical casings 5, leans in the direction of flow and the spiral blades of the radial profile of the lift force arises, to create�utami moment leading the rotor 1 and is connected to the generator in rotation. The connecting beam 7, located from the incoming stream, thanks to its cross section in the form of a segment which is convex downward and forming with the horizon an angle α, there is a lift force which presses the cylindrical housings 5 to the bottom. The connecting beam 7 at the opposite end of the installation also occurs a lifting force directed to the bottom if negative angle α does not exceed a certain value of the order of 1.5°~2°.

To prevent erosion of the bottom of the connector beams 7 and for smoother wrapping them over, as well as to reduce the load from shock waves when towing connecting beam 7 is raised above the cylindrical housings 5 and connected with them by means of pylons 6 streamlined shape.

Due to this retention of the installation of both shear and overturning is provided largely due to the hydrodynamic forces generated by the flow around the connecting beams 7 that pushes the installation to the bottom, and not just because of their weight.

For preventive maintenance is the removal of water from a cylindrical casings 5, for example, by means of compressed air supplied from the tow hoses. For this reason, the cylindrical housings 5 and the supporting beams 4 are formed in the form of cylinders, choir�sho is running on the internal pressure. Upon surfacing, the installation may be towed to the repair facilities.

Due to the large viscosity and density of water compared with air, eliminating the need for elastic elements, existing prototype for the return of the rotor 1 in a vertical position when it is stopped and unstressed tilt in the other direction. The direction of rotation of the rotor 1 does not depend on the direction of flow and optimal orientation of the rotor 1 relative to the flow is achieved by simple means, such as ball joint, sealed capsules with 2 mounting rails 4.

Installation for the energy of tidal currents, comprising a rotor consisting of a helical blade segment profile, bonded with the shaft traverses, and coupled with the generator mounted on the platform, characterized in that the lower end of the rotor shaft and connected with it the generator is placed in a sealed capsule, which by means of two trunnions projecting from opposite sides of its exterior surface supported rotatably around a horizontal axis, perpendicular to the flow direction, two support beams, sealed cylindrical housings, the extremity of which is connected between a connecting beams with a cross section of a segment, is convex downward and forming with the horizon an angle α ensuring the emergence of a lifting force, directed toward the bottom.



 

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FIELD: construction.

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11 cl, 4 dwg, 1 tbl, 1 ex

FIELD: electricity.

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3 cl, 7 dwg

FIELD: construction.

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2 dwg

FIELD: power industry.

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1 dwg

FIELD: power engineering.

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3 cl, 4 dwg

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