Leningradsky Metallichesky Zavod manufactured and successfully performed functional tests of the second impeller intended for hydropower unit (HU) No. 1 of the Maynskaya HPP. The equipment is currently being prepared for shipment scheduled for May 2021.
The design of the new impeller includes the 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 for monitoring of the condition of the stem sealings and blade flanges of the impeller without disassembly, which significantly reduces the Customer's costs for servicing 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, and 3 of the Maynskaya HPP and the installation supervision services.
As a result of the implementation of this project, 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.
To date, Power Machines has manufactured and delivered to the HPP a guide vane, an impeller, an oil-filled unit, turbine automation equipment for the HU No. 3, and spare parts for the hydroturbines of HUs No. 1, 2, and 3.
The commissioning of HU No. 1 is scheduled for 2022.