有研究通過試驗的方法驗證了外筒旋轉作為垂直螺旋輸送驅動力的可行性和差動垂直螺旋給料機的可行性，研究了外筒轉速和螺旋轉速搭配對其輸送量、功率、輸送效率的影響。

　　先建立(li)了外(wai)筒旋轉型垂直螺旋輸(shu)送(song)(song)(song)機(ji)，它差動垂直螺旋輸(shu)送(song)(song)(song)機(ji)的特殊(shu)形(xing)式(shi)，其(qi)螺旋轉速(su)為零，通過外(wai)筒旋轉輸(shu)送(song)(song)(song)物料(liao)。此(ci)樣機(ji)成功將末頁(ye)巖顆粒提(ti)升到(dao)5.5m高、輸(shu)送(song)(song)(song)量8~9th，運行(xing)成果良好，證明(ming)了外(wai)簡旋轉的方(fang)式(shi)能(neng)夠(gou)驅動散體物料(liao)垂直輸(shu)送(song)(song)(song)。

　　然后，建立了差動垂直螺旋給料機試(shi)(shi)驗(yan)平臺(tai)(tai)，此(ci)試(shi)(shi)驗(yan)平臺(tai)(tai)的螺旋轉(zhuan)(zhuan)速(su)、外筒(tong)轉(zhuan)(zhuan)速(su)分別(bie)(bie)可(ke)以調(diao)整為(wei)60rpm、80rpm、120rpm、180rpm、240rpm，即螺旋和外筒(tong)的轉(zhuan)(zhuan)速(su)搭配(pei)一共有25種，分別(bie)(bie)試(shi)(shi)驗(yan)各轉(zhuan)(zhuan)速(su)搭配(pei)，測量(liang)(liang)試(shi)(shi)驗(yan)平臺(tai)(tai)輸送(song)(song)小米的輸送(song)(song)量(liang)(liang)、功率，并計算試(shi)(shi)驗(yan)平臺(tai)(tai)的輸送(song)(song)效率，通過(guo)試(shi)(shi)驗(yan)平臺(tai)(tai)研究(jiu)轉(zhuan)(zhuan)速(su)搭配(pei)對輸送(song)(song)性能(neng)的影響。

　　根(gen)據(ju)上述研究結(jie)果，提(ti)出一種差(cha)動垂(chui)直(zhi)螺(luo)旋輸(shu)(shu)送(song)(song)機(ji)設計(ji)方法：繪(hui)制輸(shu)(shu)送(song)(song)量(liang)(liang)(liang)等高線既根(gen)據(ju)指定輸(shu)(shu)送(song)(song)量(liang)(liang)(liang)設計(ji)外(wai)筒和(he)螺(luo)旋轉(zhuan)(zhuan)速搭配的(de)(de)(de)標準(zhun)，能夠(gou)在外(wai)筒和(he)螺(luo)旋轉(zhuan)(zhuan)速搭配已知的(de)(de)(de)情況(kuang)下確(que)定輸(shu)(shu)送(song)(song)量(liang)(liang)(liang)；繪(hui)制功(gong)率等高線可(ke)以根(gen)據(ju)不(bu)同(tong)轉(zhuan)(zhuan)速搭配情況(kuang)下電機(ji)功(gong)率選擇(ze)的(de)(de)(de)標準(zhun)。但是，不(bu)同(tong)尺寸(cun)的(de)(de)(de)輸(shu)(shu)送(song)(song)機(ji)輸(shu)(shu)送(song)(song)量(liang)(liang)(liang)和(he)效率等高線是不(bu)同(tong)的(de)(de)(de)，有人(ren)對如(ru)何由某一給定尺寸(cun)的(de)(de)(de)差(cha)動垂(chui)直(zhi)螺(luo)旋輸(shu)(shu)送(song)(song)機(ji)的(de)(de)(de)輸(shu)(shu)送(song)(song)性能數據(ju)應(ying)用到其它(ta)尺寸(cun)的(de)(de)(de)差(cha)動垂(chui)直(zhi)螺(luo)旋輸(shu)(shu)送(song)(song)機(ji)設計(ji)中進行(xing)了研究。外(wai)筒旋轉(zhuan)(zhuan)型垂(chui)直(zhi)螺(luo)旋給料機(ji)試驗(yan)研究表(biao)明外(wai)筒旋轉(zhuan)(zhuan)時(shi)撓曲變(bian)形(xing)小，不(bu)需要中間軸(zhou)承。