Installation device and installation method for runner paddles of axial flow paddle turbine

Abstract

The invention discloses an installation device and method for runner blades of a movable propeller turbine. The installation device comprises four supporting pull rods with threads, wherein the four supporting pull rods are connected with screw holes of a pivot arm respectively. An inner gasket, a hollow hydraulic jack and an outer gasket are sequentially connected to each supporting pull rod in a sleeved mode, and nuts are screwed into the supporting pull rods and screwed up to enable the inner gaskets to be tightly attached to bolt hole flanges of the blades, the hollow hydraulic jacks to be tightly attached to the inner gaskets and the outer gaskets to be tightly attached to the hollow hydraulic jacks. The four hollow hydraulic jacks are connected with an oil distributor through high-pressure hoses, and the oil distributor is connected with an electric pressure pump. According to the installation device and method, the hollow hydraulic jacks are synchronized to apply pressure at the same time, and therefore stress is uniform; the stretching force of the hollow hydraulic jacks acts on a pivot of the pivot arm and enables the blades to move in place slowly, and therefore force deviation will not occur; threads of the screw holes will not be damaged easily, and therefore damage to the installation device is avoided.

Description

technical field [0001] The invention belongs to the technical field of installation tools, and in particular relates to an installation device and an installation method for runner blades of an axial-flow paddle-type water turbine. Background technique [0002] During the extended overhaul of the axial flow propeller unit of the hydropower plant, the disassembly and installation of the turbine runner blades is an essential and important item. Usually, four lifting lugs are installed on the runner blades, and then used The hook of the bridge crane (crown) is connected to the four lifting lugs of the rotor blades through a chain block, and the force on the blades is adjusted through the chain hoists, and the verticality of the shaft head of the blade, the angle of the pin hole of the shaft head and the pivot The angles of the shaft pins are the same. Slowly insert the blade towards the corresponding pivot through the bridge machine. After the pin hole is inserted into the pin,...

AI Technical Summary

Problems solved by technology

This installation method has the following defects: ①Because the bridge crane is not stable enough to walk, there is a certain deviation, and there is a certain deviation in the verticality of the pivot shaft head, which causes the phenomenon of skidding, and it is necessary to constantly adjust the position of the blade; Tighten the bolts with a hammer, and the threads of the bolts and screw holes have been damaged

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