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Oil pump for electric locomotive transformer

A technology of electric locomotives and transformers, which is applied in the field of cooling oil pumps, can solve the problems of reducing the volume, achieve the effect of small oil pumps, no leakage of the pump body, and reduce maintenance work

Inactive Publication Date: 2009-12-30
ZHUZHOU RONGDA RAILWAY ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The motor windings and bearings inside the oil pump motor use transformer oil to flow from the high-pressure oil area of ​​the oil pump, from the rear bearing to the front bearing through the oil return hole of the shaft center, and then flow back to the low-pressure oil area of ​​the oil pump, and then flow to the high-pressure oil area for continuous circulation cooling The structure solves the heat dissipation problem of the oil pump motor due to the reduced volume

Method used

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  • Oil pump for electric locomotive transformer
  • Oil pump for electric locomotive transformer
  • Oil pump for electric locomotive transformer

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Embodiment 1

[0017] From attached figure 1 It can be seen that the present invention is an oil pump for an electric locomotive transformer, including an oil pump body 1, an impeller 2 and an oil pump motor 20. The outer shell of the oil pump body 1 adopts a welded structure of steel plate and seamless steel pipe, and the interior adopts an oil circulation cooling type three-phase asynchronous The motor and the cantilever centrifugal pump are combined in a fully enclosed structure, which solves the problem of oil leakage from the cast iron pump body of the original transformer oil pump, and reduces the volume of the oil pump and reduces the weight of the oil pump itself. The interior of the oil pump motor 20 adopts a continuous circulation cooling structure. There is a flow hole 7 for the flow of cooling oil at the axis of the core shaft 21 of the oil pump motor 20. The outlet 23 of the flow hole 7 is a radial hole at the front bearing. The inlet is the end 22 of the mandrel 21; the impelle...

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Abstract

The invention relates to a pump for locomotive transformer, comprising shell and impeller, characterized in that the outer adopts the welding structure of steel plate and seamless steel pipe. The inner adopts all-closed structure of combination of three-phase asynchronous motor with oil-circulation cooling and cantilever centrifugal pump. Motor winding and bearing in pump motor adopts continuous cooling style that transformer oil flows into the front bearing from the back bearing through the oil return hole at the shaft center in the high-pressure oil region; and returns into the lower-pressure oil region of pump; and then it flows to the high-pressure oil region again.

Description

technical field [0001] The invention belongs to a component structure of a transformer, in particular to a cooling oil pump for a transformer, which is mainly used for cooling the main transformer of a railway high-speed electric locomotive. Background technique [0002] Transformer oil pumps are suitable for forced oil circulation cooling systems such as large and medium-sized power transformers, rectifier transformers, reactors, and traction transformers for electric locomotives. Transformer oil pump - is a fully sealed structure, built-in submersible three-phase asynchronous motor direct shaft drive a centrifugal or axial flow vane pump, dedicated to fluid machinery for transporting transformer insulating oil medium. The centrifugal transformer oil pump is suitable for the strong oil air cooler of the transformer; the axial flow transformer oil pump (low head, large flow) is suitable for the transformer radiator. [0003] Divided according to the structure of the driving...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D13/06F04D29/42F04D29/58F04D29/24H02K9/19
Inventor 黄立新
Owner ZHUZHOU RONGDA RAILWAY ELECTROMECHANICAL