Damen Shipyards Group: Cel mai mare electromotor cu magnet permanent pentru pompe submersibile de dragare a fost testat cu succes


Damen Shi­pyar­ds Gro­up: The lar­gest per­ma­nent mag­net motor for sub­mer­si­ble dre­d­ging pumps has been suc­cessful­ly tes­ted.

Suc­cessful full per­for­man­ce test CEMEX dre­d­ge pump e‑motor. Lar­gest sub­mer­sed per­ma­nent mag­net e‑motor pas­sed test with flying colo­urs.

The Mari­ne Aggre­ga­te Dre­d­ger CEMEX Go Inno­va­tion, cur­ren­tly under con­struc­tion for CEMEX Mari­ne UK, is fit­ted out with a sub­mer­sed dre­d­ge pump. This dre­d­ge pump is direc­tly dri­ven by an elec­tric motor – and not an arbi­tra­ry one. As a fir­st, the dre­d­ge pump dri­ve is a per­ma­nent mag­net 1,400 kW unit, that last week it unde­rwent a lar­ge array of tests – pas­sing them all effor­tles­sly.

Sub­mer­sed dre­d­ge pump dri­ve

The hopper dre­d­ger is desig­ned for mining mari­ne aggre­ga­tes at ‑55 m below sea level. The sub­mer­sed Damen dre­d­ge pump is direc­tly dri­ven by a con­ti­nu­o­us elec­tric motor – that is, witho­ut a gear box in betwe­en. More­o­ver, the elec­tric motor forms an inte­gral part of the tra­i­ling pipe struc­tu­re. But the sto­ry does not end the­re: the air fil­led e‑motor is of the Per­ma­nent Mag­net type. And in addi­tion to that, it usu­a­l­ly func­tions at ‑25 m below the sea level, that is somewhe­re midway in the tra­i­ling suc­tion pipe. This uni­que elec­tric motor has been put to the test last week.

Per­for­man­ce test

At a spe­cia­li­sed per­for­man­ce test faci­li­ty not only the e‑motor but the com­ple­te dri­ve train — inclu­ding the frequ­en­cy con­ver­ters — have been tes­ted. During a full week of tes­ting a lar­ge num­ber of diffe­rent tests have been per­for­med. The­se inclu­ded a full power test, an over­spe­ed test at 120% of the nomi­nal revo­lu­tions and a 130% torque test. All tests have been con­clu­ded satis­fac­to­ri­ly.

The tests were clo­se­ly moni­to­red by the pro­ject team, inclu­ding CEMEX repre­sen­ta­ti­ve, the suppli­er Maro­te­ch­ni­ek and the Damen pro­ject team. The CEMEX pro­ject mana­ger Mark D.Williams said : “I was impres­sed with the qua­li­ty of the equi­p­ment on test.” After a full week of tes­ting, all gear will be shi­pped to the Nether­lan­ds shor­tly, whe­re it will be fit­ted out with the dre­d­ge pump parts, and moun­ted into the tra­i­ling pipe sys­tem.

A tech­ni­cal feat

The 1,400 kW elec­tric motor on test is the lar­gest Per­ma­nent Mag­net motor used in a sub­mer­sed dre­d­ge pump dri­ve to date. The air fil­led motor is sma­l­ler, ligh­ter and more effi­cient than con­ven­tio­nal asyn­chro­no­us oil fil­led ones – with a sta­gge­ring mea­su­red effi­cien­cy of 97% inclu­ding fric­tion of all bea­rin­gs and mecha­ni­cal-seal. The elec­tric motor is con­tro­l­led by a water coo­led AFE dri­ve. The elec­tric motor has been desig­ned in clo­se coo­pe­ra­tion betwe­en Maro­te­ch­ni­ek and Damen Dre­d­ging Equi­p­ment.

Bac­k­gro­und infor­ma­tion

The hopper dre­d­ger MAD3500 CEMEX Go Inno­va­tion is cur­ren­tly under con­struc­tion at the Damen Shi­pyard in Galati, Roma­nia. The dre­d­ging equi­p­ment howe­ver is con­struc­ted by Damen Dre­d­ging Equi­p­ment in the Nether­lan­ds. The dre­d­ger will be used by CEMEX Mari­ne UK to mine aggre­ga­tes in the Bri­tish Chan­nel and Nor­th Sea. The inno­va­ti­ve dre­d­ger has a num­ber of spe­cial fea­tu­res, inclu­ding the per­ma­nent mag­net elec­tric motor, whi­ch powers the dre­d­ge pump for mining aggre­ga­tes at ‑55m.

Damen Shi­pyar­ds Gro­up

Damen Shi­pyar­ds Gro­up ope­ra­tes 36 shi­pbu­il­ding and repair yar­ds, employing 12,000 peo­ple worl­dwi­de. Damen has deli­ve­red more than 6,500 ves­sels in more than 100 coun­tries and deli­vers aro­und 175 ves­sels annu­a­l­ly to cus­to­mers worl­dwi­de. Based on its uni­que, stan­dar­di­sed ship-design con­cept Damen is able to gua­ran­tee con­sis­tent qua­li­ty.

Damen’s focus on stan­dar­di­sa­tion, modu­lar con­struc­tion and kee­ping ves­sels in sto­ck lea­ds to short deli­ve­ry times, low ‘total cost of owner­ship’, high resa­le valu­es and reli­a­ble per­for­man­ce. Fur­ther­mo­re, Damen ves­sels are based on tho­ro­u­gh R&D and pro­ven tech­no­lo­gy.

Damen offers a wide ran­ge of pro­ducts, inclu­ding tugs, wor­k­bo­ats, naval and patrol ves­sels, high spe­ed craft, car­go ves­sels, dre­d­gers, ves­sels for the offsho­re indus­try, fer­ries, pon­toons and supe­rya­chts.

For near­ly all ves­sel types Damen offers a broad ran­ge of ser­vi­ces, inclu­ding main­te­nan­ce, spa­re parts deli­ve­ry, trai­ning and the trans­fer of (shi­pbu­il­ding) know-how. Damen also offers a vari­e­ty of mari­ne com­po­nents, such as noz­z­les, rud­ders, win­ches, anchors, anchor chains and ste­el wor­ks.

Damen Shi­pre­pair & Con­ver­sion (DSC) has a worl­dwi­de network of eigh­te­en repair and con­ver­sion yar­ds of whi­ch twel­ve are loca­ted in Nor­th West Euro­pe. Faci­li­ti­es at the yar­ds inclu­de more than 50 floa­ting (and cove­red) dry­do­c­ks, inclu­ding the lon­gest, 420 x 80 metres, and the widest, 405 x 90 metres, as well as slo­pes, ship lifts and indo­or halls. Pro­jects ran­ge from the sma­l­lest sim­ple repairs thro­u­gh Cla­ss’ main­te­nan­ce to com­plex refits and the com­ple­te con­ver­sion of lar­ge offsho­re struc­tu­res. DSC com­ple­tes aro­und 1,300 repair and main­te­nan­ce jobs annu­a­l­ly, both at yar­ds as well as in ports and during voya­ge.

Man­ga­lia News, 06.04.2019.

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