SU95062A1 - Hydroelectric power station, combined with the dam - Google Patents

Description

The invention relates to structures of dams and the power section of hydroelectric power plants that are combined in one structure.

Various types of combined hydroelectric power stations of the same designation with surface and subsea generator are known.

The proposed "invention is characterized by the use in the construction of caissons lowered to a solid base, as well as the placement of aggregates in them, the generator being installed below and the turbine above it; Such a package using caissons significantly reduces the amount of work on the construction of the dam's flybet by eliminating impervious devices from the upstream, as well as minimizing the level of the spillway ridge, which increases its throughput for long-haul.

The drawing shows a cross-section along the block of hydraulic unit, placed in the caisson.

The machine room is located in the underground part of the station building, which is erected in a caisson manner with a breakdown of the caissons into blocks of units. The generator 1 is mounted on a cylindrical or conical hollow reinforced concrete support 2, which excludes the possibility of resonance during vibrations. On the same support (inside) there is a generator 3. Generator exciters can be mounted on the extension of the drive shaft inside the cylindrical support below the generator subassembly.

Automatic turbine speed controllers and auxiliary control equipment (oil-mounted installations) are located on the second floor of the machine room at the generator level. It is also possible to arrange them higher, at the level of the turbine guide. The turbine chamber 4 and the intake part are located above the household building and, according to their location, belong to

No. 95062-2 -

the underwater part of the station. This arrangement of the main equipment presupposes a vertical arrangement of the shaft of the unit.

It is proposed to use a propeller-type turbine with rotary blades, however, it is not excluded that other types of turbines can be used that correspond to the given pressures and operating conditions of the station, but with the obligatory location of the turbine chamber above the generator room. Water is supplied to the turbine directly, without avankemer and spiral cameras. The slats are located at an angle of 30-45 ° above the guide device. The rear wall of the turbine shaft and the inter-turbine space represent the retaining part of the structure. Wastewater energy is used by applying double ejection: surface - when discharging through the ridge of the weir and internal - when discharging through bottom holes that have access to the suction pipes of the turbines.

The described type of building of the hydroelectric station is applicable to the conditions of flat rivers with unfavorable soils (powerful alluvial hardness and with a predominance of fine-grained sand and silt fractions), underlain at a depth of 25 m with stronger soils (shale, sandstone, limestone, etc.). -).

Subject invention

Hydroelectric plant combined with a dam, characterized in that, in order to reduce the amount of work on the construction of impervious devices, to facilitate the flow of the dam, as well as to maximally reduce the top of the spillway to increase its capacity during the flood pass, the turbine chambers and generator rooms also and water supply devices and suction tubes to the turbines are located inside the caissons, with the generator rooms in the caissons located under the respective turbine chambers.

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