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Hydraulic design method for running down model impeller of nuclear main pump

A technology of hydraulic design and nuclear main pump, which is applied in the components, pumps, and pump elements of pumping devices for elastic fluids, and can solve problems such as little impact research.

Inactive Publication Date: 2016-05-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this stage, the research on the idling process of the nuclear main pump mainly focuses on the influence of the flywheel's moment of inertia on it, while the influence of the impeller's moment of inertia on it is rarely studied
Therefore, the idling model of the nuclear main pump established at this stage ignores the influence of the impeller moment of inertia on the idling process

Method used

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  • Hydraulic design method for running down model impeller of nuclear main pump
  • Hydraulic design method for running down model impeller of nuclear main pump
  • Hydraulic design method for running down model impeller of nuclear main pump

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Embodiment Construction

[0082] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0083] Design requirements: the design flow rate is 17886m 3 / h, the design head is 111.3m, the speed is 1485rev / s, g is 10kg / m 2 , the number of blades is 7 pieces, the weight of the flywheel is 8t, the radius of the flywheel is 450mm, the shaft diameter of the flywheel is 140mm, and the density of the impeller material is 7.85g / cm 3 ; Obtainable: moment of inertia I of flywheel 0 : 888.4N﹒ m; Moment of inertia I of the whole nuclear main pump: 973.1N. m; diameter of the impeller inlet of the nuclear main pump D 0 : 660mm; nuclear main pump impeller outlet diameter D 2 : 710mm; nuclear main pump impeller outlet width b 2 : 160mm; blade outlet placement angle β 2 : 37°; blade wrap angle 120°.

[0084] The above is a specific description of the present invention ...

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Abstract

The invention belongs to the field of fluid machinery and particularly discloses a hydraulic design method for a running down model impeller of a nuclear main pump. Specific to the condition that a nuclear main pump running down model neglects the influence of impeller rotational inertia on the running down process, the impact of geometric parameters of an impeller of the nuclear main pump on the operating performance and the impeller rotational inertia is considered simultaneously in the design process of the nuclear main pump impeller, and thus the key parameters of the designed impeller can well meet the requirement of performance during normal operation and the impeller can have large rotational inertia so that the running down time can be prolonged.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and relates to a hydraulic design method for an impeller of a nuclear main pump, in particular to a hydraulic design method for an idling model impeller of a nuclear main pump. Background technique [0002] The nuclear main pump, also known as the nuclear reactor coolant pump, is one of the main equipment of the reactor coolant system. It is located between the nuclear reactor and the steam generator. Its main functions are as follows: When the main system is filled with water, the main pump It is used to catch the air; before the reactor is opened, the main pump is used to circulate the temperature to reach the temperature required for the reactor; when the reactor is in normal operation, the coolant flowing out of the evaporator is sent back to the reactor for heating to ensure that the primary circuit coolant Circulate to cool the core. The nuclear main pump is the only rotating equipment insid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/22F04D29/24
CPCF04D29/22F04D29/242
Inventor 王秀礼钟华舟卢永刚王洋朱荣生
Owner JIANGSU UNIV
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