Disc-motor axial flow pump for cooling of transformer

Abstract

The invention provides a disc-motor axial flow pump suitable for cooling of a transformer. The disc-motor axial flow pump adopts an axial air gap inducing disc motor, a motor rotor is installed on an impeller, and a double-guide vane structure is adopted and is fully closed in an axial flow pump body to form an integrated pump and machine. The disc-motor axial flow pump has a compact and reasonable structure and meets the request of various transformers on cooling oil pumps. An imported NSK combined back-to-back ball bearing is adopted, so that the axial size of the disc-motor axial flow pump is shortened, the axial magnetic pulling force of the motor counteracts the axial centrifugal force of the impeller when the axial flow pump is operated, and further the service life of the bearing is prolonged. The overall operation of the disc-motor axial flow pump is more stable and reliable, the vibration is small, and the noise is low. Meanwhile, an oil inlet and an oil outlet of the disc-motor axial flow pump are designed into 180 degrees, so that when the axial flow pump shuts down, the axial flow pump body is used as an oil flow pipeline to play a role of self-cooling, so that the energy source is saved.

Description

Technical field [0001] The invention relates to the technical field of motor pumps, and more specifically to a disc-type motor axial flow pump for circulating cooling of a transformer. Background technique [0002] The cooling technology based on the strong oil circulation system is currently a common oil cooling method for transformers. The coolant circulation pump used is usually a centrifugal oil pump. The centrifugal oil pump drives the oil to circulate to achieve cooling. When this common centrifugal oil pump stops running, it will cause a certain resistance to the flow of coolant in the entire cooling system, which will affect the cooling effect. In addition, the centrifugal oil pump used in the strong oil cooling cycle of the existing transformer has a large structure and a separate set of the machine, which cannot meet the requirements of the use of small transformers. Moreover, the existing centrifugal oil pump has short service life, Disadvantages such as unstable oper...

AI Technical Summary

Problems solved by technology

When this commonly used centrifugal oil pump stops running, it will cause certain resistance to the flow of coolant in the entire cooling system and affect the cooling effect.

Moreover, the pump and machine of the centrifugal oil pump used in the existing transformer strong oil cooling cycle are arranged separately, and the structure is relatively large, which cannot meet the requirements for the use of small transformers. Moreover, the existing centrifugal oil pump also has short service life, Disadvantages such as unstable operation, large vibration and high noise

Images