Leningradsky Metallichesky Zavod produced the second hydro-turbine impeller for the hydropower unit (HU) No. 1 of the Maynskaya HPP.
The design of the new impeller includes mounting assemblies (bearings) of the blade rotation mechanism made of a modern carbon-glass-epoxy composite material that does not require lubrication. In addition to that, the design has the following feature: when the hydro-turbine is stopped, the novel system of pipes and holes located within the shaft and inside the impeller allows monitoring the condition of the stem sealings and the blade flanges of the impeller without disassembly, which significantly reduces the customer's costs for maintenance of the unit.
The contract for the supply of hydro-turbine equipment for the Maynskaya HPP was signed between Power Machines and RusHydro in September 2018. The scope of obligations of Power Machines includes the manufacture and supply of equipment for hydro-turbines of units No. 1, 2, 3 of the Maynskaya HPP and the installation supervision services.
As a result of the project implementation, the efficiency of the hydro-turbines will be increased, while the capacity of each of them (at the maximum head) will increase from 110 MW to 113.5 MW.
So far, Power Machines has manufactured and delivered to the station a guide vane, an impeller, an oil pressure unit, and turbine automation equipment for HU No. 3 and a guide vane, an oil pressure unit, and turbine automation equipment for HU No. 1, as well as spare parts for hydro-turbines of HU No. 1, 2, and 3.
The commissioning of HU No.1 is scheduled for 2022.