SU909002A1 - Apparatus for regulating the variables of a water stream in spillways combined with hydroelectric stations - Google Patents

Description

The invention relates to hydraulic structures and can be used in the operation of combined hydroelectric power plants to regulate ejection by changing the direction of the jets and the flow of water emerging from the spillway to the downstream.

A device is known for using the ejection effect at the outlet of a suction pipe of a hydroelectric power station obtained by discharging water through a spillway (11.

However, in this device, to obtain a tangible effect of ejection, a very significant consumption of water at the spillway is required.

A device for controlling the parameters of the flow of water in spillways combined with hydroelectric power plants [2].

A disadvantage of the known device is the inability to maintain an optimal ejection mode, since the magnitude of the ejection effect here depends only on the discharge through the water discharge.

The purpose of the invention is to increase the energy efficiency of the water stream by maintaining an optimal ejection mode.

DEVICE FOR REGULATING WATER FLOW PARAMETERS IN WATER DISCHARGES COMBINED WITH HYDRO POWER PLANTS

To achieve this goal, the spillway is made in the form of two channels, at the exit of which are installed

- made bicuspid shutters, each leaf of which is made with a width equal to or less than the width of the channel and is installed with the possibility of rotation in the direction of the lower and upper jq of its downstream.

In FIG. 1 shows a plan of one unit of combined hydroelectric power station with spillways; in FIG. 2 — section A — A in FIG. 1

The device includes double-leaf shutters with shutters 1 and 2, pivotally pivotally mounted on the axes 3. The shutters are located at the outlet of the spillway channels 4.

__ The device operates as follows.

With an increased water level in the downstream (in the absence of danger of cavitation of the turbine impeller) into the downstream, through the spillways 25, the maximum water discharge is discharged, and the direction of the outgoing water jets from the spillways is set at an angle to the axis of the water discharge, ensuring maximum ejection in the downstream .

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For this, the leaves 1 open towards the downstream at an angle cL to the main spillway, and the leaves 2 open towards the upstream by an amount that ensures the passage of the required water flow through the spillway. With a lowered water level in the downstream, a large ejection value can lead to cavitation erosion of a hydroturbine. Therefore, the ejection value is reduced to a minimum by giving the jets of the water discharged to the downstream direction parallel to the spillway axis, with the maximum separation of the jets from one another and ensuring a minimum value of the discharge water flow. For this, the leaves 1 open to the full extent until they come into contact with the outer walls of the spillway, and the leaves 2 open towards the upper pool by a value that allows the passage of the minimum possible water flow.

The proposed device will enable the additional generation of electricity with virtually no additional costs.

Claims (1)

Claim A device for controlling the parameters of the water flow in spillways combined with hydroelectric power plants, § including a spillway with gates located above the suction pipe, characterized in that, in order to increase the efficiency of energy use of the water flow by maintaining the optimal ejection mode, the spillway is made in the form of two channels, at the exit of which there are installed bicuspid gates, each leaf of which is made with a width equal to or less than the width of the channel, and is installed with the possibility of gates towards the lower and upper pools.