Fixing structure for upper pressing blocks of stereoscopic wound core open-ventilated dry-type transformer
US9991042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2014 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Oct 29, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F30/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fixing structure for the upper pressing blocks of a stereoscopic wound core open-ventilated dry-type transformer, including three coils arranged vertically. Three coils are arranged in triangle; an insulation ring is arranged at the upper end of each of the coils; a pressing block used for pressing the corresponding coil is placed on the upper surface of each insulation ring; an upper clamp is arranged above the pressing blocks; and press rods for pressing the pressing blocks are arranged on the bottom surface of the upper clamp. According to the disclosure, the upper clamp presses the pressing blocks and then the pressing blocks 3 press the coils, so the loosening of the coils is prevented and impact resistance of the coils is ensured; moreover, the pressing blocks which press the coils do not need to be tensioned by a lower clamp through utilizing a screw, and thus, the phase-to-phase distance between three coils will not be increased and the insulation distance between the coils is not to be increased; and in addition, four pressing blocks are evenly arranged on each coil, and thus, the coils bear more uniform stress, so the coils can be pressed better.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.