Anti-surge ring mechanism of cooling fan of control rod drive mechanism

A technology for cooling fans and driving mechanisms. It is used in machines/engines, liquid fuel engines, mechanical equipment, etc., and can solve problems such as blade fatigue fracture, potential safety hazards, and fans entering the surge area.

Inactive Publication Date: 2014-04-30
NANTONG DART POLLRICH FAN
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The cooling fan of the control rod drive mechanism is strictly forbidden to operate in the surge area. The harmfulness of operation in the surge area is as follows: the conveying air flow oscillates back and forth, causing the control rod drive mechanism system to fail to discharge heat normally, and the root of the blade bears a large aerodynamic alternating load , may lead to

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  • Anti-surge ring mechanism of cooling fan of control rod drive mechanism
  • Anti-surge ring mechanism of cooling fan of control rod drive mechanism

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Embodiment Construction

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0016] Such as figure 1 As shown, the anti-surge ring mechanism of the cooling fan of the control rod drive mechanism disclosed in the present invention is a vertical vertical upward exhaust structure, specifically including the fan body, and the fan body is fixed by the vibration-damping support O On the basis, the fan body includes an air cylinder 1, the two ends of the air cylinder 1 are respectively provided with an air inlet 2 and an air outlet 3, and the interior of the air cylinder is sequentially provided with a moving blade 4, a hub 5, and a guide Blade 6, inner casing 7, drive motor 8 and diffuser tail cone 9, the air outlet 3 is connected to the air outlet cone pipe 10, and the air outlet of the air outlet cone pipe 10 is equipped with a damper 11.

[0017] Specifically, t...

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PUM

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Abstract

The invention discloses an anti-surge ring mechanism of a cooling fan of a control rod drive mechanism. An annular groove is formed outside an anti-surge ring, a plurality of flow deflectors are evenly arranged in the annular groove in the peripheral direction, and flow guide rings are arranged on the inner sides of the flow deflectors. The anti-surge ring is arranged on an air duct of the cooling fan, the air duct is fixed through a support, and a movable vane, a hub, a guide vane, an inner machine box, a drive fan and a diffusion tail cone are arranged inside the air duct. An air outlet in the upper end of the air duct is connected with an air outlet taper pipe, and an air valve is arranged inside the air outlet taper pipe. The anti-surge ring mechanism of the cooling fan of the control rod drive mechanism has the advantages of being simple and novel in structure, and capable of ensuring that the fan can still operate smoothly under small flow.

Description

technical field [0001] The invention relates to a cooling fan, in particular to an anti-surge ring mechanism for a cooling fan of a control rod drive mechanism. Background technique [0002] The control rod drive mechanism cooling fan is a ventilation and cooling system for the control rod drive mechanism of the integrated stack top assembly of the third-generation nuclear power unit. Its function is to provide forced cooling air for the control rod drive mechanism to maintain the coil assembly of the control rod drive mechanism The temperature required for normal operation does not exceed the limit value. The performance of the fan directly affects the safety and reliability of the reactor drive mechanism. [0003] The cooling fan of the control rod drive mechanism has the characteristics of large hub ratio and large blade installation angle, and is a typical high-pressure axial flow fan. The performance characteristic curve of high-pressure axial fans usually has obvi...

Claims

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Application Information

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IPC IPC(8): F04D29/66
Inventor 张国荣江杨
Owner NANTONG DART POLLRICH FAN
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