The type of winding machine of the winding machine tensioner

Winding Machine Tensioner: Types of Winding Machines

1. Vertical winding machine

The larger the capacity of the transformer used now, the greater the impact on the power grid, and the higher the safety requirements. The manufacturing quality of the transformer requires not only reliable electrical performance, but also more reliable mechanical stability and short-circuit resistance. The stability is mainly manifested in the control of the manufacturing process of the coil, that is, the electromagnetic balance of the high and low voltage coils is required, and the axial turns are close and evenly distributed. Therefore, the coil winding process is required to be compressed in the axial direction and in the radial direction. The vertical winding machine is used to take advantage of the self-weight of the wire cake, and the axial direction is naturally compressed, and the radial tension device is used to control the tension. Therefore, vertical winding machines are generally used for the winding of high-voltage coils in large transformers, and even low-voltage spiral coils are produced by vertical winding machines.

The current vertical winding machine is further developed to large-scale. The original vertical winding machine has a load of only 20t, and now it has been increased to 40t. The maximum diameter of the coil is 3500mm, and the maximum height is 4000mm. The airbag plate tensioning device is used, and the tension is digitally displayed, and the tension control is more accurate, stable and reliable. In order to improve the dimensional accuracy of the wound coils, the radial runout of the vertical winding machine is controlled, and a fixing device for the shaft head of the winding die is added; in order to control the axial runout, high-precision double-row roller type large bearings are used. Therefore, winding production has reached a new level by using special equipment for coil winding. Therefore, it is possible to further reduce the loss, reduce the partial discharge, reduce the weight and reduce the cost of the transformer.

2. Horizontal winding machine

From the perspective of transformer winding structure design, not all coils can be produced by vertical winding machines. Such as layer structure, multi-helix structure coil. If this kind of coil is wound with an ordinary horizontal winding machine, it is wound without any pressure in the axial direction, and the gap between the line segments is large, like a compression spring. After the coil is compressed, the diameter becomes larger, and there is a gap between the coil and the paper tube, which will cause the coil to become unstable in the axial direction. In the event of axial electromotive force, the coil may be damaged. Therefore, horizontal winding machines with axial and radial compression are widely used in the production of large transformer coils. As the performance requirements of transformers are getting higher and higher, the production of small and medium-sized transformers has gradually begun to use compression type horizontal winding machines.

3. Foil coil winding machine

The foil coil winding machine is the key equipment for winding low-voltage foil coils. Tension control and foil tape correction are the key technologies of foil coil winding machines. The tension of the foil tape of the existing domestic or imported foil coil winding machine is generated by mechanical friction, and the tension is not stable enough, which will cause uneven tightness of the wound coils, inconsistent DC resistance between coils, and outer diameter of the coil. Poor and other defects.

Domestic manufacturers have developed a new type of digital foil winding machine. This machine uses a DC motor to generate foil tension. It is characterized by convenient, accurate and stable tension adjustment. Winding quality. In particular, it has a wide range of tension adjustment, which is more suitable for winding thin foil tapes, and will not cause damage to the edges of the foil tapes. In addition, the tension motor is in the state of generating electricity when in tension state, and the generated electric energy can be fed back to the winding motor or the power grid, and the friction energy consumption of the frictionless braking tension mode is remarkable, and the energy saving is remarkable. Moreover, the control system will automatically calculate the diameter of the feeding coil of the uncoiler, so as to adjust the output torque of the motor at any time to ensure the constant tension throughout the winding process, which plays a key role in ensuring the quality of the coil. At the same time, the device's deviation adjustment system uses photoelectric analog sensors to non-contact detection of the edge of the foil strip, and the servo motor is used for dynamic deviation correction. The system has high precision, fast response, high reliability and high deviation adjustment accuracy. According to the existing information, the equipment technology has been at the leading level in the world.