BS ISO 14695-2003 Industrial fans - Method of measurement of fan vibration《工业电扇 风机振动的测量方法》.pdf

1、%5,7,6+ 67$1$5%6 ,62%6 Industrial fans Method of measurement of fan vibration,* V HH * =*Z KHU H* PPP;Pc $ * PPPP $ * PPP=Pcc $ nullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnullD Q G W KH SRVL W L RQ RIPU H O D W L Y H WR WKH F H QWUH R IJU D Y L WL VPU H O D W L Y H WR WKH F H

2、QWUH R IJU D Y L WL VPU H O D W L Y H WR WKH F H QWUH R IJU D Y L WL VZ KHU HP L VWKH WRWD OPD VV RI D VVH P E O L QNL ORJ U D PV N J PL VWKH P D VV RI W KH ID Q L QNL ORJ U D PV N J PL VWKH P D VV RI W KH PRWR L QNL ORJ U D PV N J PL VWKH P D VV RI W KH EDV H L QNL ORJ U D PV N J * * ;cc H W F . H

3、I D Q P PRWRU P EDV H VXSSRUW P U H V L O LHQW PRXQW L Q J) LJXUH $ * H Q H U D OOD RXWRI DFH QWULIX J D O I D Q D VVH P E ORQUH V L O LHQW PRXQWL Q J Vnullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull$ 3 RVL W L RQL Q J R I U H V L O LHQW PRXQWV$ V G H V F U L E H G L Q & O D X

4、VH U H V L O LHQW PRXQWV D U H WR E H SRVL W L RQH G VXF K W K D W H DFK PRXQWK D VWKH V D P H QRPL Q D OVWD W L FHIO H F W L RQ 7 K XV LI PRXQW ORFDW L RQV UH O D W L Y H WR WKHF H QWUH R IJU D Y L WD U JLY H Q E D Q G W KH Y H UWL FDOD Q G K RUL RQW D OVLIIQ H VVH IHDFK PRXQWD U H U H SUH V H QWH

5、GE N9D Q G N+ L QQH ZWRQV S H UPH WUH U H VSH F W L Y H OPRXQWVK D Y H WRE H SRVL W L RQH G VXF K W K D W 9QQNG +QQG Z KHU H GQL VWKH LQ G L Y L G X D O G HIO H F W L RQ L QPL OOL P H WUH V PP D Q GZ KHU H PRXQWG HIO H F W L RQVGWR GD U H QRPL Q D OO H TXD OWRZL W KLQWROH U D Q F H O L P L WV RI V H

6、H & O D XVH 1 27()D QWK UXVW P D D IIH F WWKHQRPL Q D O G HIO H F W L RQ XQG H UUXQQL Q J F RQG L W L RQV$ & D O F XOD W L RQ RI U LJLG E R G QD WXUD O I U H TXH Q F LH V$ * H Q H U D O, Q JHQ H U D O I D Q D VVH P E O LHV D U H G H V LJQ H G VXF K W K D WWKH Y H UWL FDO KHLJKWRI W KH F H QWUH R IJU

7、 D Y L WDERYH W KHPRXQWVL VH VV WK D RQH W KLU G R I W KHVPD OOH VW K RUL RQW D O G L VWD Q F H E H WZHHQPRX WV , I W KLV F RQG L W L RQ L VVD W L V ILHG L W L VVXIILF LHQWO DFFXUD W HIRU WKHSXUSRV H R I WR FDO F XOD W H W KH U LJL G E R G QD WXUD O I U H TXH Q F LHVRI W KH ID Q D VVH P E OD VVXPL Q

8、 J SXUH PRG H VI Y L E U D W L RQ L H W K D KHU LVQRF RXSOL Q J E H WZHHQWUD QVOD W L RQD O D Q G URWD W L RQD OPRWL RQV) RU FDV H VZKHU H W KH RQH W KLU G U D W L R L V H F HHG H G F RXSOH G PRG H D Q D OVL V L UH F RPPH Q G H G V HH $ 1 27( , I D O D U JH G HJU HH R I D VPPH WU H L VWV D PRUH F RP

9、SOH D Q D OVL V L UH TX L U H G L QZKLF K FDV H F URVV SURG X F WV R IL Q H UWL DDQ G VW LIIQ H VV D U HLQ F OX G H G , QWKLV FDV H L W L V DGY L V DEO H WRF RQVXOW D VSH F L D O L VW$ & RXSOH G PRG H D Q D OVL V, I W KH Y H UWL FDORIIV H W E H WZHHQWKHRYH U D OOF H QWUH R IJU D Y L WD Q G W KH HO D

10、 VWL FFH QWUH R I W KH PRXQWL Q J F RQILJXUD W L RQ L VQRW QHJO LJLE O H WZR URF N L Q J PRG H VZL OO RFFXU K RVHIU H TXH Q F LHV ID Q G I L Q KHUW + D U HJLY H Q E WKHI ROORZ L Q JHTXD W L RQV+I & I $ +I & I $ Z KHU H %U $ nullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull1/ 222

11、2214= (1 ) (1 )2+ + zCBBr(A.7) Z KHU H + 9+NN% $ U L VWKH U DGL XV RIJU D W L RQ L QPL OOL P H WUH V PP 5,P $ L VWKH HIIHF W L Y H Y H UWL FDORIIV H WRI U H V L O LHQW PRXQWV L QPH WUH V P + NN $ ,5L VWKH PRPH QW RILQ H UWL DDERXW WKH D L VWK URXJK W KHF H QWUH R IJU D Y L W RI W H P L QN L ORJ U D

12、PVSH UVTXD U H P H WUH N J P 7 KH Y H UWL FDORIIV H W FDQ E H P L Q L P L H GEXVL Q J D Q L Q H UWL DEDV H WR VXSSRUW W KH ID Q D Q G PRWRUD VVH P E O L Q DY L E U D W L RQ WH VW 7 KH P D VV RI W KH LQ H UWL DV H V K RXOGEH D OH D VW H TXD W WKH F RPE L Q H G P D VV RI W KH ID Q D Q GPRWRUD VVH P E

13、O D Q G SUHIHU DEOJ U H D W H U , W L V DGY D QWD JHRXV WR V H O H F W D SOD QVL H R I W KH LQ H UWL DEDV H Z KLF LV D WOH D VW J U H D W H UWK D QWKH ID Q EDV HI U D P H V L H 7 KH ID Q PRWRUD VVH P E O VK RXOG W KHQ E H ORFDW H G RQ WKH EDV H VXF K W K D WWKH RYH U D OO F H QWUH R IJU D Y L WI D Q

14、 PRWRUL V D V F ORV H D VSRVVL E O H WR WKH F H QWUH R IJU D Y L WL Q H UWL DEDV H 7 KLV D SSURDFK V K RXOGDOORZ WKH WROH U D Q F H RQH DFK VWD W L FGHIO H F W L RQ RI W KHPRXQWL Q J WR E H DFKLHY H G $ & D O F XOD W L RQ7 KH U LJL GER G QD WXUD O I U H TXH Q F LHV D VVXPL Q J W KH IROORZ L Q J D XQ

15、F RXSOH G PRG H R I Y L E U D W L RQE W KH KRUL RQWD OVWLIIQ H V RIHDFKLVROD WRU L VWKH V D P HLQ D OO G L U H F W L RQVF D OO QD WXUD O I U H TXH Q F LHV D U H XQGDPSH G D U H FDO F XOD W H GDV I ROORZV 9 H UWL FDOPRG H 7 KH IU H TXH Q F RI W KH Y H UWL FDOPRG H R I Y L E U D W L RQ I9 L Q KHUW + L

16、 V JLY H Q E WKHI ROORZL Q JHTXD W L RQZ KHU H P L VWKHWRWD OPD VV RI W KH D VVH P E O L QNL ORJ U D PV N J nullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnullthe sway mode coupled frequencies which result when the vertical offset is not negligible. 1/ 2VV12=kfm(A.11) and sway modes. Thus, the decoupled mode approach will tend to under-predict the rocking mode and over-predict KH VVWIn general, the effect of coupling is to increase the separation in frequency between the decoupled rocking