Guide vane main feed water pump for nuclear power plant conventional island

The utility model relates to pumps for nuclear power plant conventional islands, in particular to a guide vane main feed water pump for a nuclear power plant conventional island. The guide vane main feed water pump comprises a drive side bearing body, a left pump cover, a pump cylinder body component, a guide vane, a right pump cover, a non-drive side bearing body and a pump rotor component, wherein the left pump cover and the right pump cover are connected with the pump cylinder body component, the guide vane is covered on the right pump cover, the other end of the guide vane is matched with the left pump cover through a spigot, and a containing space with an annular hollow interior is formed after combined assembly is carried out; a suction connection pipe and spitting connection pipe of the pump are combined with a pump cylinder body into a whole in a welded mode, and a pump shaft is supported by the drive side bearing body and the non-drive side bearing body, penetrates out from the drive side bearing body, and is connected with a hydraulic coupler; and a vane wheel is in a double suction structure, fixedly connected to the shaft through a threaded sleeve, and matched with the guide vane for energy conversion. The guide vane main feed water pump for the nuclear power plant conventional island has the advantages of high pressure, high rotating speed, and high efficiency, is provided with a vane wheel hydraulic model with sharp descending performance, a suction chamber, the guide vane and an annular water pressure chamber, the suction chamber, the guide vane and the annular water pressure chamber are matched with the vane wheel hydraulic model, and thus basic using performance requirements of a system are met.