Hydraulic pressing machine capable of machining transformer coil

Abstract

A hydraulic pressing machine capable of machining a transformer coil comprises an oil tank which is connected with an oil inlet of a quantitative vane pump through a low pressure oil feeding pipeline, an oil outlet of the quantitative vane pump is connected with an oil inlet of a low pressure oil conveying pipeline, a low pressure inlet oil filter and a low pressure one-way valve capable of enabling hydraulic oil to flow towards the outlet end are sequentially arranged on the low pressure oil conveying pipeline in series from the inlet end to the outlet end, the section, located between the low pressure inlet oil filter and the low pressure one-way valve, of the low pressure oil conveying pipeline is connected with an oil inlet of a low pressure oil discharging pipeline, and the low pressure oil discharging pipeline is connected with a low pressure normally-open unloading electromagnetic relief valve in series. The hydraulic pressing machine capable of machining the transformer coil is high in production efficiency, and can avoid damage to winding insulation caused by imbalanced stress of the coil, avoid the situation that press power is too small to generate a large air gap to lead to eddy-current loss and flux leakage and therefore the transformer emits heat, avoid the situation that the press power is too large to damage wire insulation and cause deformation of a winding, and better guarantee quality of the transformer coil produced by the hydraulic pressing machine.

Description

technical field [0001] The invention relates to a hydraulic press machine capable of processing transformer coils. Background technique [0002] The three basic components of the transformer are divided into iron core, winding coil and cooler, and the winding coil is not only the conductive circuit of the transformer, but also the heart of the transformer. Due to different winding methods and different operating methods, the winding coils that have just been wound will cause large size differences in the axial direction of the winding coils; in order to ensure that the axial dimensions of the coils of the same specification are consistent, the traditional method is Adopt the manual loading method of upper and lower platens, four-corner pull rods and nuts; this method has the following four disadvantages: [0003] 1), Manual loading is time-consuming, laborious and inefficient. [0004] 2) The force on the coil is unbalanced; the unbalanced force will easily damage the wind...

AI Technical Summary

Problems solved by technology

[0003] 1), Manual loading is time-consuming, laborious and inefficient

[0004] 2) The force on the coil is unbalanced; the unbalanced force can easily damage the winding insulation and cause damage to the transformer

[0005] 3) The pressing force of the winding coil is not easy to control and cannot be monitored. If the pressing force is too small, a large air gap will be generated, resulting in eddy current loss and magnetic flux leakage, which will cause the transformer to heat up

Excessive pressing force may damage the wire insulation and deform the winding

[0006] 4), the axial size is not easy to control

Although the coil size meets the design requirements when loaded, when the loading force is removed, the coil will exceed the design value due to rebound

[0007] 5) The axial dimension can only be measured manually, but real-time monitoring cannot be realized

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