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擺動式液壓缸

擺動(dong)(dong)(dong)(dong)(dong)式(shi)液壓缸(gang)是輸出扭(niu)矩(ju)并實(shi)現往復(fu)運(yun)動(dong)(dong)(dong)(dong)(dong)的執行元件，有單葉(xie)片、雙葉(xie)片、螺(luo)(luo)旋(xuan)(xuan)擺動(dong)(dong)(dong)(dong)(dong)等幾種形式(shi)。葉(xie)片式(shi)式(shi)：定子塊固定在(zai)缸(gang)體上，而葉(xie)片和轉子連(lian)接在(zai)一起。根據進油(you)方向，葉(xie)片將(jiang)帶動(dong)(dong)(dong)(dong)(dong)轉子作往復(fu)擺動(dong)(dong)(dong)(dong)(dong)。螺(luo)(luo)旋(xuan)(xuan)擺動(dong)(dong)(dong)(dong)(dong)式(shi)又(you)分單螺(luo)(luo)旋(xuan)(xuan)擺動(dong)(dong)(dong)(dong)(dong)和雙螺(luo)(luo)旋(xuan)(xuan)兩(liang)種，現在(zai)雙螺(luo)(luo)旋(xuan)(xuan)比較常用，靠兩(liang)個螺(luo)(luo)旋(xuan)(xuan)副降液壓缸(gang)內活塞的直(zhi)線(xian)運(yun)動(dong)(dong)(dong)(dong)(dong)轉變為直(zhi)線(xian)運(yun)動(dong)(dong)(dong)(dong)(dong)與自轉運(yun)動(dong)(dong)(dong)(dong)(dong)的復(fu)he運(yun)動(dong)(dong)(dong)(dong)(dong)，從而實(shi)現擺動(dong)(dong)(dong)(dong)(dong)運(yun)動(dong)(dong)(dong)(dong)(dong)。

緩沖裝置

在(zai)液壓(ya)系(xi)統中使用(yong)液壓(ya)缸(gang)(gang)(gang)驅動具有一定(ding)質量的機構(gou)，當液壓(ya)缸(gang)(gang)(gang)運動至行程(cheng)終點(dian)時(shi)具有較大動能(neng)，如未作(zuo)減速(su)(su)處理，液壓(ya)缸(gang)(gang)(gang)活塞與缸(gang)(gang)(gang)蓋將發(fa)生機械(xie)碰撞，產生沖(chong)擊、噪聲，有破壞性(xing)。為緩(huan)(huan)和及(ji)防(fang)止(zhi)這種危害發(fa)生，因此(ci)可在(zai)液壓(ya)回路中設(she)置(zhi)減速(su)(su)裝置(zhi)或在(zai)缸(gang)(gang)(gang)體內設(she)緩(huan)(huan)沖(chong)裝置(zhi)。

加工

缸(gang)(gang)筒作為(wei)液壓缸(gang)(gang)、礦用(yong)單體支(zhi)(zhi)柱、液壓支(zhi)(zhi)架、炮管等產品(pin)的主要(yao)部件，其(qi)(qi)加(jia)工質量的好壞直(zhi)接(jie)影(ying)響整個產品(pin)的壽命和可靠性(xing)。缸(gang)(gang)筒加(jia)工要(yao)求(qiu)高(gao)，其(qi)(qi)內表面粗(cu)糙度(du)(du)要(yao)求(qiu)為(wei)Ra0.4～0.8&um，對同(tong)軸度(du)(du)、耐磨性(xing)要(yao)求(qiu)嚴(yan)格。缸(gang)(gang)筒的基本(ben)特征是深孔加(jia)工，其(qi)(qi)加(jia)工一直(zhi)困擾加(jia)工人(ren)員。

一(yi)般地(di)說(shuo)，測(ce)量時造成(cheng)深(shen)度不大的(de)(de)(de)(de)細長(chang)形劃傷(shang)是(shi)輕微(wei)的(de)(de)(de)(de)，不影響運行精度，但如果測(ce)量桿頭(tou)(tou)尺寸(cun)調(diao)節不當(dang)，測(ce)量觸頭(tou)(tou)硬行嵌入，會造成(cheng)較為重度的(de)(de)(de)(de)傷(shang)痕。解決此問題的(de)(de)(de)(de)對策，首先(xian)是(shi)測(ce)量出調(diao)節好(hao)的(de)(de)(de)(de)測(ce)量頭(tou)(tou)的(de)(de)(de)(de)長(chang)短度，此外，用一(yi)張只在測(ce)量位(wei)置(zhi)上開孔的(de)(de)(de)(de)紙(zhi)帶，貼在缸壁內表面，即(ji)不會產生上述(shu)形狀劃痕。測(ce)量造成(cheng)的(de)(de)(de)(de)輕微(wei)劃痕，一(yi)般用舊砂(sha)布的(de)(de)(de)(de)反面或馬糞紙(zhi)即(ji)可擦去。