CN103821773A - Control rod drive mechanism cooling fan with diffuser tail cone - Google Patents
Control rod drive mechanism cooling fan with diffuser tail cone Download PDFInfo
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- CN103821773A CN103821773A CN201410053365.0A CN201410053365A CN103821773A CN 103821773 A CN103821773 A CN 103821773A CN 201410053365 A CN201410053365 A CN 201410053365A CN 103821773 A CN103821773 A CN 103821773A
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- tail cone
- control rod
- rod drive
- exhaust outlet
- crd
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Abstract
The invention discloses a control rod drive mechanism cooling fan with a diffuser tail cone. The control rod drive mechanism cooling fan comprises a support, a fan body, an air outlet conical tube, and an air valve. The fan body comprises an air cylinder; the lower end of the air cylinder is provided with an air inlet; moving vanes, a hub, guide vanes, an inner casing and a drive fan are sequentially disposed inside the air cylinder; the drive fan is mounted inside the inner casing; the air cylinder and the inner casing form an air outlet of a circular passage; the diffuser tail cone is mounted at one end of the air outlet; the section of the diffuser tail cone is trapezoidal, and a single-side diffusion angle of the diffuser tail cone is 5-20 degrees. The control rod drive mechanism cooling fan has the advantages that the structure is simple and novel, pressure loss in the process of fan diffusion can be decreased, pressure allowance is increased and the fan is more secure and reliable accordingly.
Description
Technical field
The present invention relates to a kind of cooling blower, be specifically related to a kind of control rod drive mechanisms (CRD) cooling blower with diffusion tail cone.
Background technique
Control rod drive mechanisms (CRD) cooling blower is a kind of for the integrated heap top component of generation Ⅲ nuclear power unit control rod drive mechanisms (CRD) ventilation cooling system, its effect is to force cooling-air for control rod drive mechanisms (CRD) provides, to maintain the required temperature of the normal work of control rod drive mechanisms (CRD) coil block, and be no more than limit value, the performance of this blower fan directly affects the safety and reliability of reactor driving mechanism.
Control rod drive mechanisms (CRD) cooling blower is vertical axial-flow fan, requirement pressure is high, size is little, and need there is higher pressure allowance, to improve full reliability, therefore all there is big hub than the structure characteristic of (ratio of hub diameter and impeller diameter), current known engineering reactor top axial fan hub ratio is generally 0.7 left and right, and therefore control rod drive mechanisms (CRD) cooling blower has the aerodynamic characteristics of high exhaust velocity, high dynamic pressure.
As shown in Figure 6, conventional control rod drive mechanisms (CRD) cooling blower, without diffusion tail cone, comprises bearing 61, air duct 62, described air duct 62 bottoms are provided with intake grill 63, described air duct 62 inside are provided with movable vane 64, wheel hub 65, stator 66 from bottom to up successively, interior casing 67, drive motor 68, described exhaust outlet 63 connects exhaust outlet Taper Pipe 69, and the exhaust outlet of described exhaust outlet Taper Pipe 68 is provided with air-valve 70.Gas, after the movable vane acting of rotary blade, flows into rear guide vane diffusion, and the annular pass exhaust outlet sudden expansion then consisting of air duct and interior casing upwards enters Taper Pipe, then enters atmosphere in heap.
As shown in Fig. 7 ~ 9, through conventional control rod drive mechanisms (CRD) cooling blower exhaust outlet in Fig. 8 is carried out to numerical simulation, under design discharge, conventional blower fan annular exhaust outlet axial exhaust speed is conventionally in 45m/s left and right, its kinetic energy is greater than 1200Pa, enter at a high speed Taper Pipe, flow area sudden expansion increases, and has very maelstrom after annular exhaust outlet, its resistance coefficient reaches 27%, and the pressure loss exceedes 300Pa.
Therefore, existing conventional control rod drive mechanisms (CRD) cooling blower existing problems are: blower fan apparatus efficiency is low, data shows that existing Engineering Control rod drive mechanism cooling blower tests according to AMCA210-99, lower than 50%, also only has 65% left and right at best efficiency point in operating point for design fan efficiency; Because the exhaust outlet pressure loss is larger, reduce operating pressure allowance, cause safety reliability to reduce.
In addition, control rod drive mechanisms (CRD) cooling blower requires to have sufficiently high pressure allowance under design angle, with away from blower fan surge area and irregular operation district, due to the larger sudden expansion pressure loss of annular exhaust outlet, the effective pressure that blower fan can provide to system is reduced, the highest can also corresponding reduction of operating pressure, thereby operating pressure allowance reduces, safety reliability declines.
Summary of the invention
Goal of the invention: in order to solve the deficiencies in the prior art, the invention provides one and can reduce the pressure loss in blower fan diffusion process, improve pressure allowance, thereby improve the control rod drive mechanisms (CRD) cooling blower with diffusion tail cone of safety reliability.
The object of the invention is to realize by such technological scheme, a kind of control rod drive mechanisms (CRD) cooling blower with diffusion tail cone, comprise bearing, blower fan body, exhaust outlet Taper Pipe and air-valve, wherein said blower fan body comprises air duct, described air duct lower end is provided with intake grill, described air duct inside is provided with movable vane successively, wheel hub, stator, interior casing and driving blower fan, described driving assembling is in described interior casing, the exhaust outlet of described air duct and described interior casing looping passage, described exhaust outlet end is provided with diffusion tail cone, described diffusion tail cone cross section is trapezoidal, and monolateral angle of flare is 5 ~ 20 °.
Preferably 15 ° of the monolateral angles of flare of described diffusion tail cone.
Described exhaust outlet Taper Pipe is inverted cone, and monolateral angle of flare is 5 ~ 20 °.
Described exhaust outlet Taper Pipe upper-end inner diameter is 1100mm.
The corresponding air duct of the blade tip position of described movable vane is provided with anti-surge ring, is provided with plural guide plate in described anti-surge ring.
Described stator is wing blade.
Owing to having adopted technique scheme, disclosed a kind of control rod drive mechanisms (CRD) cooling blower with diffusion tail cone, at exhaust outlet, diffusion tail cone is set, and the radius of diffusion tail cone is discharged direction along air-flow and is reduced gradually, thereby significantly reduce the eddy resistance of annular pass exhaust outlet high velocity air in exhaust outlet Taper Pipe diffusion process, and then the internal pressure reducing in diffusion process is lost, fan operation pressure is improved, and then pressure allowance and the safety reliability of fan operation are improved, the novelty simple in structure of the present invention simultaneously, easy for installation, diffusion tail cone is located at blower fan inside, do not affect the boundary dimension of blower fan.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is exhaust outlet air velocity simulation vector diagram of the present invention;
Fig. 4 is exhaust outlet air velocity distribution cloud atlas of the present invention;
Fig. 5 is exhaust outlet air total head cloud charts of the present invention;
Fig. 6 is the structural representation of existing control rod drive mechanisms (CRD) cooling blower;
Fig. 7 is existing control rod drive mechanisms (CRD) cooling blower exhaust outlet air velocity simulation vector diagram;
Fig. 8 is existing control rod drive mechanisms (CRD) cooling blower exhaust outlet air velocity distribution cloud atlas;
Fig. 9 is existing control rod drive mechanisms (CRD) cooling blower exhaust outlet total head cloud charts.
Embodiment
Below in conjunction with accompanying drawing of the present invention, the technological scheme of the embodiment of the present invention is carried out to clear, complete description.
As shown in Figure 1, disclosed a kind of control rod drive mechanisms (CRD) cooling blower with diffusion tail cone, it is vertical exhaust structure straight up, specifically comprise blower fan body, described blower fan body is fixed on basis by vibration damping holder 0, described blower fan body comprises air duct 1, described air duct 1 two ends are respectively equipped with intake grill 2 and exhaust outlet 3, described air duct inside is provided with movable vane 4 from bottom to up successively, wheel hub 5, stator 6, interior casing 7, drive motor 8 and diffusion tail cone 9, described exhaust outlet 3 connects exhaust outlet Taper Pipe 10, the exhaust outlet of described exhaust outlet Taper Pipe 10 is provided with air-valve 11.
Particularly, described air duct 1 forms annular pass to described exhaust outlet Taper Pipe 10 exhausts with described interior casing 7, diffusion tail cone 9 is equipped with in described interior casing 7 upper ends, described drive motor 8 is built in described interior casing 7, described diffusion tail cone 9 is coated on described drive motor 8 outsides, described diffusion tail cone 9 cross sections are trapezium structure, and monolateral angle of flare α is 5 ~ 20 °, best monolateral angle of flare α is 15 °, the radius of described diffusion tail cone 9 reduces gradually along airflow direction, flow area is increased gradually, so reduce exhaust velocity and dynamic pressure value, increase static air pressure value.
Described air duct 1 is cylindrical structural, and its upper end connects exhaust outlet Taper Pipe 10, and the monolateral angle of flare β of described exhaust outlet Taper Pipe 10 is 5 ~ 20 °, and the Taper Pipe exhaust outlet internal diameter of described exhaust outlet Taper Pipe 10 is 1100mm.
Described air-valve 11 is arranged on the exhaust outlet of described exhaust outlet Taper Pipe 10, in the time that blower fan is out of service, has prevented that outer gas stream from pouring in down a chimney in blower fan, and its internal diameter size is identical with the exhaust outlet internal diameter of described exhaust outlet Taper Pipe.
As shown in Figure 2, the corresponding air duct of the blade tip front end position of described movable vane 4 is provided with anti-surge ring 12, described anti-surge ring 12 outsides are circular groove 13, in described circular groove 13, be along the circumferential direction evenly provided with plural guide plate 14, described guide plate 14 inner sides are provided with guide ring 15, described guide ring 15 internal diameters are identical with described air duct 1 bottom 102 internal diameters, in the time that system resistance increases, the movable vane 4 inlet air flow angles of attack increase, movable vane 4 suction surface air-flows are seriously separated, and form eddy current in movable vane 4 leading edges, eddy current enters anti-surge ring 12 under centrifugal action, due to the obstruct of profile groove 13, air-flow can only enter in the divider passages that guide plate 14 and guide ring 15 form, eddy current air mass is through separating, after rectification, turn back in main air flow, make further developing of eddy current suppressed, thereby eliminate surge area, no longer thermal agitation of movable vane 4 front and back air-flows simultaneously, avoid movable vane 4 to bear larger alternation pneumatic power, improve the safety reliability of movable vane 4.
Described stator 6 is wing blade structure, effectively reclaims described movable vane 4 and goes out entraining air stream winding speed kinetic energy, improves fan performance, improves safety reliability.
Disclosed a kind of control rod drive mechanisms (CRD) cooling blower with diffusion tail cone, its working principle is: gas sucks from intake grill 2, after the movable vane 4 of over-rotation is done manual work, flow into stator and carry out diffusion, and after exhaust outlet 3 exhausts of the annular pass that forms through air duct 1 and interior casing 7, gas is discharged by exhaust outlet Taper Pipe 10.
Shown in Fig. 3 ~ 5 and Fig. 7 ~ 9, by cooling blower of the present invention and conventional cooling blower are carried out to numerical simulation, the in the situation that of design isodose, vortex of the present invention obviously reduces and weakens at exhaust outlet, the present invention is owing to increasing diffusion tail cone, in tail cone sidewall Wu Dao district and tail end because size restrictions refluence scope reduces, negative pressuren zone reduces, peak suction drops to 170Pa by 760Pa simultaneously, described exhaust outlet resistance coefficient is reduced to 6% by 27%, the pressure loss is reduced to 71.6Pa by 334Pa, corresponding fan action has improved 262Pa in the pressure of system, efficiency has improved 10% simultaneously.
Technology contents of the present invention and technical characteristics have disclosed as above; but those of ordinary skill in the art still may do all replacement and modifications that does not deviate from spirit of the present invention based on announcement of the present invention; therefore; protection domain of the present invention should be not limited to the content that embodiment discloses; and should comprise various do not deviate from replacement of the present invention and modifications, and contained by present patent application claim.
Claims (6)
1. the control rod drive mechanisms (CRD) cooling blower with diffusion tail cone, comprise bearing, blower fan body, exhaust outlet Taper Pipe and air-valve, wherein said blower fan body comprises air duct, described air duct lower end is provided with intake grill, described air duct inside is provided with movable vane, wheel hub, stator successively, interior casing and driving blower fan, described driving assembling, in described interior casing, is characterized in that: the exhaust outlet of described air duct and described interior casing looping passage, and described exhaust outlet end is provided with diffusion tail cone, described diffusion tail cone cross section is trapezoidal, and monolateral angle of flare is 5 ~ 20 °.
2. the control rod drive mechanisms (CRD) cooling blower with diffusion tail cone according to claim 1, is characterized in that: preferably 15 ° of the monolateral angles of flare of described diffusion tail cone.
3. the control rod drive mechanisms (CRD) cooling blower with diffusion tail cone according to claim 1, it is characterized in that: described exhaust outlet Taper Pipe is inverted cone, and monolateral angle of flare is 5 ~ 20 °.
4. according to the control rod drive mechanisms (CRD) cooling blower with diffusion tail cone described in claim 1 or 3, it is characterized in that: described exhaust outlet Taper Pipe upper-end inner diameter is 1100mm.
5. the control rod drive mechanisms (CRD) cooling blower with diffusion tail cone according to claim 1, is characterized in that: the corresponding air duct of the blade tip position of described movable vane is provided with anti-surge ring, is provided with plural guide plate in described anti-surge ring.
6. the control rod drive mechanisms (CRD) cooling blower with diffusion tail cone according to claim 1, is characterized in that: described stator is wing blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410053365.0A CN103821773A (en) | 2014-02-17 | 2014-02-17 | Control rod drive mechanism cooling fan with diffuser tail cone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410053365.0A CN103821773A (en) | 2014-02-17 | 2014-02-17 | Control rod drive mechanism cooling fan with diffuser tail cone |
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| CN103821773A true CN103821773A (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410053365.0A Pending CN103821773A (en) | 2014-02-17 | 2014-02-17 | Control rod drive mechanism cooling fan with diffuser tail cone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852898A (en) * | 2020-07-17 | 2020-10-30 | 上海凯泉泵业（集团）有限公司 | Structure of channel diffusion part of submersible axial flow pump |
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| CN2437888Y (en) * | 2000-07-11 | 2001-07-04 | 北京新安特玻璃钢设备有限公司 | Centrifugal cylindric fan |
| CN2448968Y (en) * | 2000-11-08 | 2001-09-19 | 南通市同济申海大型风机有限公司 | Vibration-proof reservible axial-flow blower fan |
| CN201050510Y (en) * | 2007-06-08 | 2008-04-23 | 浙江金盾风机风冷设备有限公司 | Axial-flow fan surge-proof ring for subway |
| CN201368039Y (en) * | 2009-03-16 | 2009-12-23 | 江苏中联风能机械有限公司 | Efficient anti-surging axial flow fan |
| US20100111667A1 (en) * | 2007-04-05 | 2010-05-06 | Borgwarner Inc. | Ring fan and shroud air guide system |
| CN201891674U (en) * | 2010-11-15 | 2011-07-06 | 南通大通宝富风机有限公司 | Blower diffuser pipe having reinforcing ribs |
| CN202612212U (en) * | 2012-05-17 | 2012-12-19 | 上虞专用风机有限公司 | Stacking fan of control rod driving device |
| CN203685693U (en) * | 2014-02-17 | 2014-07-02 | 南通大通宝富风机有限公司 | Control rod drive mechanism cooling fan with diffusion tail cone |
-
2014
- 2014-02-17 CN CN201410053365.0A patent/CN103821773A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2437888Y (en) * | 2000-07-11 | 2001-07-04 | 北京新安特玻璃钢设备有限公司 | Centrifugal cylindric fan |
| CN2448968Y (en) * | 2000-11-08 | 2001-09-19 | 南通市同济申海大型风机有限公司 | Vibration-proof reservible axial-flow blower fan |
| US20100111667A1 (en) * | 2007-04-05 | 2010-05-06 | Borgwarner Inc. | Ring fan and shroud air guide system |
| CN201050510Y (en) * | 2007-06-08 | 2008-04-23 | 浙江金盾风机风冷设备有限公司 | Axial-flow fan surge-proof ring for subway |
| CN201368039Y (en) * | 2009-03-16 | 2009-12-23 | 江苏中联风能机械有限公司 | Efficient anti-surging axial flow fan |
| CN201891674U (en) * | 2010-11-15 | 2011-07-06 | 南通大通宝富风机有限公司 | Blower diffuser pipe having reinforcing ribs |
| CN202612212U (en) * | 2012-05-17 | 2012-12-19 | 上虞专用风机有限公司 | Stacking fan of control rod driving device |
| CN203685693U (en) * | 2014-02-17 | 2014-07-02 | 南通大通宝富风机有限公司 | Control rod drive mechanism cooling fan with diffusion tail cone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852898A (en) * | 2020-07-17 | 2020-10-30 | 上海凯泉泵业（集团）有限公司 | Structure of channel diffusion part of submersible axial flow pump |
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Application publication date: 20140528 |
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