Pole core press mounting device of generator rotor of hydro-power generating unit

Abstract

The invention relates to a pole core press mounting device of a generator rotor of a hydro-power generating unit, belonging to the technical field of generators. The invention is characterized in that the press mounting device is provided with a support, stretching cylinders and a hydraulic transmission system, wherein the stretching cylinders are arranged at two sides of a pole core on the support, and the hydraulic transmission system is a hydraulic transmission mechanism and mechanical transmission mechanism in which the two stretching cylinders move synchronously. The invention ensures that the pole core is press mounted, laminated and penetrated in a stretching screw, satisfies the pole core press mounting requirements of a rotor of a large or medium-sized hydro-power generating unit, has high compactness and flatness requirements of the pole core, ensures the pole core assembling quality of the large or medium-sized hydro-power generating unit and improves the production and processing efficiency.

Description

technical field [0001] The invention belongs to the technical field of generators, and in particular relates to a press-fitting device for a magnetic pole core of a generator rotor of a hydroelectric unit. Background technique [0002] At present, before the preloading of the rotor magnetic pole core of the generator set, the magnetic pole clamping screw at one end of the rotor and the magnetic pole core punching sheet are put into the tensioning screw with the magnetic pole clamping screw, and after being loaded into the magnetic pole clamping plate at the other end, the tightening nut is tightened and sent to the Pressurize in the following order. This process has the following disadvantages: (1) For the rotor pole cores of large and medium-sized hydroelectric generators, the length of the pole cores has even increased to more than 2 meters with the increase of the capacity of the unit, and the accumulated error of the pole core punching pieces Greatly exceeded the design...

AI Technical Summary

Problems solved by technology

This process has the following disadvantages: (1) For the rotor pole cores of large and medium-sized hydroelectric generators, the length of the pole cores has even increased to more than 2 meters with the increase of the capacity of the unit, and the accumulated error of the pole core punching pieces Greatly exceeds the design allowable error requirements

(2) Due to the increase in the design length of the rotor pole core of large and medium-sized hydropower units, the friction force between the pole punching hole and the tension screw is very large. When the length of the pole core increases, the friction force is difficult to overcome, and the pressure cannot be transmitted. To the various parts of the pole core, so that the pole core cannot meet the tightness requirements

(3) Since the tightening screw has been penetrated during compression, it is quite laborious and time-consuming to adjust the number of different punches in each part of the magnetic pole core.

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