Deformation Strengthening Device for Generator Guard Ring Blank

Abstract

The invention discloses a deformation strengthening device for a generator retaining ring blank. The deformation strengthening device comprises a press, an upper support plate, a cone, a support frame and a sliding block, which are orderly arranged from top to bottom; the sliding block is arranged on the support frame in a horizontal sliding manner; the retaining ring blank to be processed is arranged on the sliding block; a wedge block combination is arranged between the cone and the blank; the conical degree of the inner surface of the wedge block combination is matched with the conical degree of the outer surface of the cone, and the wedge block combination is specifically composed of 8-12 wedge blocks with sector block structures. According to the invention, a specially-made expensive high-voltage pump is saved, and an originally used super-huge press of 300MN is reduced to a press of 50MN. Compared with a hydraulic deformation device, a complicated hydraulic sealing device is saved, and the mechanical structure is simplified.

Description

technical field [0001] The invention relates to a device in the technical field of metal plastic extension, in particular to a deformation strengthening device for a blank of a generator retaining ring. Background technique [0002] In recent years, the demand for power in Wuwei has shown a rapid growth trend, the power of generators has also increased, and the quality requirements for generator forgings have become more stringent. The retaining ring installed on the rotor of the turbogenerator is used to balance the effect of centrifugal force and prevent deformation of the rotor winding front. Install two retaining rings and two centering rings on the rotor of each turbogenerator. The dimensions of various retaining rings used on turbogenerators are: outer diameter the inside diameter of The height is 150-900mm, the thickness is 20-100mm, and the size of the centering ring is smaller. [0003] In addition to high mechanical loads, the retaining ring is also subjected ...

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Problems solved by technology

[0009] However, the disadvantages of the above-mentioned prior art include: 1) the large tonnage of die forging equipment is required; 2) special high-pressure pumps and complex sealing devices are required; 3) the number of forming cones is too small, and the internal force transmission to the outside is a hexagonal prism. As a result, the bulging force of the retaining ring is uneven, so the deformation is uneven, resulting in performance anisotropy, which greatly reduces the product qualification rate, and the mechanical properties that can be strengthened σ0.2 can only reach 950MPa, while the protection required by the 800MW generator The σ0.2 of the ring must be greater than 1050MPa; 4) During the deformation process, the inner and outer surfaces of the strengthening ring have non-cylindrical deviations, which increases the machining allowance, and how the bottom of the retaining ring contacts the press table in this technology is not indicated. It is difficult to effectively control the accuracy of the manufactured retaining ring

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