A tongue hole punching device on the curved surface of the rectangular hollow rotor bar of the generator

Abstract

The invention discloses a tongue hole punching device on a curved surface of a rectangular hollow rotor wire rod of a generator, which includes a tongue hole punching device on a surface with the same left and right structures and symmetry. The curved tongue hole punching device includes a mounting seat, a wire rod bracket, and a vertical pressing mechanism. , punching tongue hole device, locking mechanism and slider; the punching tongue hole device includes a punching cylinder and a punching knife; the slider is arranged on the mounting seat and is driven by the punching cylinder to move linearly reciprocatingly and fixedly The punching knife in the slider punches tongue holes on the rotor rods installed in the rod bracket, and the vertical pressing mechanism is arranged on the upper part of the rod bracket to position and compress the rotor rods in the vertical direction ; This device can meet the tongue hole positioning of different groups of rotor bars of the same type of generator by changing the installation position. For rotor bars of different models and specifications, the compatibility requirements can be met by replacing the bar bracket parts.

Description

technical field [0001] The invention relates to the field of three-dimensional bending forming devices for the end of a wire rod of a rectangular hollow rotor of a generator, in particular to a device for punching tongue holes on the curved surface of a wire rod of a rectangular hollow rotor of a generator. Background technique [0002] The rotor bar of the air-cooled turbogenerator below 150MW is a rectangular hollow copper wire with a single hole. For the internal cooling of the rotor coil, a tongue-shaped air inlet channel (referred to as punch in the industry) should be processed on each rotor bar conductor. Tongue holes), in conjunction with other processing on the wire rods, to form a V-shaped ventilation circuit between adjacent wire rods. Due to the needs of the rotor coil structure of generators below 150MW, the three-dimensional curved forming surface of the end of some rotor bars and the tongue hole are too close or even partially overlapped. The existing 50HZ ge...

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Problems solved by technology

[0003] The object of the present invention is to provide a device for punching the tongue hole on the curved surface of the rectangular hollow rotor bar of the generator, so as to solve the problem of processing the tongue hole and the wire bar in the area near the three-dimensional bending forming surface of the existing rotor bar end proposed in the background technology. The problem between non-annealing and bending forming processes is that punching the tongue hole first, then annealing and softening the wire rod, and finally performing three-dimensional curved surface forming at the end, which reduces the problem of production efficiency

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