Overall drying and compressing die for multiple hydro-generator stator coils

Abstract

The invention discloses a die for integrally drying and compressing multiple coils, after the stator coils for the hydro-generator have been subjected to vacuum pressure impregnation. The linear part of the die is composed of several groups of C-shaped clamping members which can clamp the linear parts of the coils and form a die cavity, so that the multiple coils can be transversely arranged, and sizes of the coils in an iron core groove are ensured. The end part of the die is provided with supporting members with two side plates to serve as bottom supports of the coils, sealing weld head parts of the coils are respectively clamped by an inner layer toothed plate and an outer layer toothed plate in a scissor structure, and thereby the coils are fixed and end part pitch values and rising values of the coils can be adjusted according to actual requirements. The die can simultaneously dry and compress 12-16 coils, and effectively control in-groove section size and end part shape of the coils, is high in drying and compressing efficiencies, universal in main components and capable of being integrally hoisted and achieving the coils with good consistence after drying and compressing.

Description

Technical field: [0001] The invention relates to a stator coil VPI impregnated for a hydroelectric generator used for baking and pressing the coil [0002] The structural feature of the mold is that it can bake and press multiple coils horizontally, and the main components can be used in common. Background technique: [0003] Vacuum pressure impregnation of stator coils is a very important coil insulation manufacturing process at present. The main insulation of stator coils after vacuum pressure impregnation is soft, not cured, and the geometric shape and size are not rigid. It must be subjected to high temperature in a baking furnace. Baking and pressing to solidify the main insulation of the outer layer of the copper wire, and ensure that the cross-sectional dimension accuracy and geometric shape accuracy meet the requirements of the lower coil, and make the coil as a whole have a certain rigidity. At present, in the industrial production of hydropower stator coils, many ...

AI Technical Summary

Problems solved by technology

At present, in the industrial production of hydropower stator coils, many baking mold structures are used, basically all of which are special molds, one mold is used for drying and pressing two to four coils, or multi-layer upper and lower stacking and pressing, installation and clamping The process efficiency of the tight coil is low, the geometric dimension value of the baked coil is too discrete, and the consistency is difficult to control

Each time a coil of one size is produced, the mold cannot continue to be used, and the tooling costs involved are too high

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