A shielded motor main pump pump casing guide device

Abstract

The invention relates to a pump shell flow guiding device of a canned motor main pump. At present, a pump shell flow guiding device, capable of forming a stable flow field and reducing flow resistance of fluid when the fluid passes a pump shell, of a canned motor main pump does not exist. The flow guiding device is characterized in that the device comprises a cylinder, an upper cover plate, a flow guiding bend, a main supporting plate, two vertical supporting plates and two horizontal supporting plates; the cylinder comprises a cylinder front element, a cylinder rear element and two cylinder side elements; the cylinder front element, one cylinder side element, the cylinder rear element and the other cylinder side element are sequentially fixed end to end to form a cylindrical cylinder; the upper cover plate is fixed to the top of the cylinder; the main supporting plate, the two vertical supporting plates and the two horizontal supporting plates are fixed into the cylinder, the flow guiding bend is in an arc-shaped structure and is located in the cylinder, an outlet of the flow guiding bend and a transverse opening of the cylinder front element are fixed, and an inlet of the flow guiding bend is connected into a longitudinal opening of the upper cover plate in a penetrating mode. By means of the pump shell flow guiding device, a stable flow field can be formed, and flow resistance of fluid can be reduced when the fluid passes the pump shell.

Description

technical field [0001] The present invention relates to a flow guide device, in particular to a shielded motor main pump casing flow guide device, which is mainly used in places with large spaces where the front and rear pipelines are irregularly connected, and is used to form a stable flow field to reduce flow resistance . Background technique [0002] The large-scale advanced pressurized water reactor nuclear power plant is a sub-item of one of the 16 national major scientific and technological projects determined in the "National Medium and Long-Term Science and Technology Development Program (2006-2020)". Reactor coolant pump, as one of the key equipment in the primary circuit system of the pressurized water reactor nuclear power plant, plays an important role in the energy conversion of the nuclear power plant, and is known as the heart of the reactor cooling system. At present, the main pumps used in domestic one-million-kilowatt nuclear power plants are all foreign d...

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Problems solved by technology

[0003] Now there is also a structure that can play a diversion effect on the pump body. For example, in the Chinese patent with the publication date of December 10, 2008 and the publication number CN201162721, a pump casing synchronously rotating diversion liquid pump is disclosed. The pump adopts the synchronous rotation of the rotating pump casing and the impeller to solve the problem of certain functional loss caused by friction between the rotating liquid in the pump and the inner wall of the pump casing due to the static pump casing of the liquid pump, but the structure of the liquid pump is relatively complicated.

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