當你(ni)千(qian)挑萬選購買了一臺平(ping)衡機，開始(shi)投入(ru)使用時，問題(ti)來了，要如(ru)何選擇平(ping)衡機的轉速呢？

選(xuan)擇動(dong)(dong)(dong)平(ping)衡機的轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)時，要(yao)(yao)考慮的因素很(hen)多。有人認為在(zai)校(xiao)驗動(dong)(dong)(dong)平(ping)衡時應該與(yu)該轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)(zi)的實際(ji)工作(zuo)時的轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)一致，因此(ci)往往對(dui)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)提出較高的要(yao)(yao)求(qiu)(qiu)。其實，對(dui)剛性轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)(zi)而(er)言，不論其實際(ji)工作(zuo)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)，還是(shi)動(dong)(dong)(dong)平(ping)衡轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)，都遠遠低于轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)(zi)本(ben)身(shen)的臨界(jie)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)，因此(ci)只要(yao)(yao)在(zai)“低速(su)(su)”是(shi)能達到(dao)動(dong)(dong)(dong)平(ping)衡的精(jing)(jing)度(du)要(yao)(yao)求(qiu)(qiu)，轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)(zi)在(zai)實際(ji)工作(zuo)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)條件下仍能達到(dao)規定的精(jing)(jing)度(du)要(yao)(yao)求(qiu)(qiu)。而(er)一般(ban)來(lai)講，大多數的風機轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)(zi)都是(shi)屬于剛性轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)(zi)，通常在(zai)低速(su)(su)平(ping)衡就能達到(dao)風機轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)(zi)的使用精(jing)(jing)度(du)要(yao)(yao)求(qiu)(qiu)。

如果轉(zhuan)(zhuan)速(su)選擇(ze)過高，則對(dui)動平衡(heng)(heng)(heng)機而言起(qi)動功(gong)率、操(cao)作時(shi)(shi)間(jian)、潤滑保養(yang)等均比低(di)速(su)時(shi)(shi)要求高。因(yin)此在要求精度的前提下盡可能在較低(di)的轉(zhuan)(zhuan)速(su)下作動平衡(heng)(heng)(heng)校(xiao)驗。因(yin)此一般對(dui)于校(xiao)驗剛性轉(zhuan)(zhuan)子的動平衡(heng)(heng)(heng)機，通(tong)常我(wo)沒呢將其稱為“低(di)速(su)動平衡(heng)(heng)(heng)機”。

動平衡機規范

動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)機(ji)(ji)規范中規定(ding)了“動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)轉速(su)(su)”，其意義是動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)機(ji)(ji)在作(zuo)動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)校驗(yan)時的轉速(su)(su)。一(yi)般動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)機(ji)(ji)有“固定(ding)轉速(su)(su)”及(ji)“無級”轉速(su)(su)兩種。前者表示(shi)(shi)動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)機(ji)(ji)僅能在規定(ding)的轉速(su)(su)下進行動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)校驗(yan)，如300r/min 或600r/min等。后(hou)者表示(shi)(shi)動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)機(ji)(ji)在某一(yi)較(jiao)寬(kuan)的轉速(su)(su)范圍可以任意選擇，如180-2800r/min，即表示(shi)(shi)動(dong)(dong)(dong)(dong)平(ping)(ping)衡(heng)(heng)(heng)機(ji)(ji)校驗(yan)可以在180r/min-2800r/min范圍內任意轉速(su)(su)下進行。