柱塞泵特點:∵圓形構件配合,加工方便,精度高,密封性好 ∴有如下特點 (1)工作壓力高,效率高 (2)易于變量 (3)流量范圍大柱塞泵分類 軸向柱塞泵特征:柱塞軸線平行或傾斜于缸體的軸線 軸向柱塞泵的組成:配油盤、柱塞、缸體、傾斜盤等 V密形成—柱塞和缸體配合而成 V密變化,缸體逆轉,右半周,V密增大,吸油(左半周,V密減小,壓油) 吸壓油口隔開—配油盤上的封油區(qū)及缸體底部的通油孔 軸向柱塞泵變量原理 γ=0q=0γ(大小變化,流量大小變化;方向變化,輸油方向變化) 當缸體轉動時,泵的排量為:V=Zhπd2/4=πd2ZD(tanγ)/4 軸向柱塞泵流量 理論流量:qT=Vn=D(tanγ)·zπd2/4 實際流量:q=qTηpv=D(tanγ)·zηpvπd2/4 結論 1)qT=f(幾何參數(shù)、n、γ) 2)n=c,γ=0,q=0,γ(大小變化,流量大小變化;方向變化,輸油方向變化),所以軸向柱塞泵可作雙向變量泵 軸向柱塞泵主體:中心彈簧機構 A滑靴和斜盤 B柱塞和缸體 中心彈簧:使泵具有自吸性能,提高容積效率 缸體端面間隙的自動補償:中心彈簧,缸體底部通油孔p 缸體端面間隙的自動補償:柱塞孔底部的液壓除中央彈簧外,還使缸體靠近配流盤,補償端面間隙,提高體積效率。
柱塞頭部結構:球形頭部-與斜盤接觸,接觸應大,易磨損滑靴結構-與斜盤接觸面接觸,大大減少了磨損 變量機構:手動:—轉動手輪控制斜盤,改變傾角即可;自動 液壓馬達功能:將液體的壓力能轉化為旋轉機械能,并對負荷工作。
液壓馬達分類: 按照排量能否調節(jié):定量和變量 可根據(jù)輸油方向改變:單向和雙向: 按照輸出轉矩是否連續(xù):旋轉式和擺動式 液壓電機的工作原理:當壓力油進入電機時,柱塞在油壓下壓力傾斜板,而傾斜板對柱塞產生反作用力,由于傾斜力可分解為兩個力(軸向力Fx=πd2p//4;徑向分力Fy=γ=π/4·d2ptanγ),F(xiàn)x與液壓平衡,F(xiàn)y在缸體中心產生扭矩,使缸體驅動電機軸旋轉。
液壓馬達主要參數(shù) p.V.q等與泵相似,其原則差別:泵—輸出,馬達—輸入 液壓電機轉矩及機械效率:Tt=ΔpV/2π,T=Ttηm=ΔpVηm/2π 液壓馬達轉速和容積效率:nt=q/v n=qηv/V ∵T∝Vn∝1/V ∴V↑、T↑、n↓,故馬達又可分為高速小轉矩和低速大轉矩 各類液壓泵的共同點和不同處 流量的形成:依靠密封容積的變化吸、壓油,從而形成連續(xù)不斷的供油。
流量調節(jié):齒輪泵、葉片泵、螺桿泵均為定量泵、可變葉片泵、徑向柱塞泵、偏心距離、軸向柱塞泵、斜盤(或斜軸)傾角 困油現(xiàn)象:除螺桿泵外皆有,齒輪泵最嚴重,其他泵設計合理可減小或消除 流量脈動: 齒輪泵:取決于齒數(shù)、嚙合角 葉片泵:取決于葉片數(shù)和過渡曲線類型 柱塞泵:取決于柱塞數(shù)和配流盤參數(shù) 液壓泵選用原則: 可靠—工作情況、要求 合理—能量使用 實用—使用情況 經(jīng)濟—價廉 90L075-DC-1-AB-60-S-3-C7-D-GB-GBA-42-42-24 90L075DC1AB60S3C7DGBGBA424224 90-L-075-DC-1-AB-60-S-3-C7-D-GB-GBA-42-42-24 90L075DC1AB60S3C7DGBGBA424224 90-L-075-DC-1-AB-80-R-4-S1-E-GB-GBA-42-42-24 90L075DC1AB80R4S1EGBGBA424224 90-L-075-DC-1-BB-80-S-4-S1-D-G8-GBA-42-42-24 90L075DC1BB80S4S1DG8GBA424224 90-L-075-DC-1-BC-60-P-4-C6-D-GB-GBA-35-35-24 90L075DC1BC60P4C6DGBGBA353524 90-L-075-DC-1-BC-60-P-4-S1-D-GB-GBA-35-35-24 90L075DC1BC60P4S1DGBGBA353524 90-L-075-DC-1-BC-80-S-4-S1-D-GB-GBA-35-35-24 90L075DC1BC80S4S1DGBGBA353524 90-L-075-DC-1-CD-60-R-3-C7-C-GB-GBA-38-38-24 90L075DC1CD60R3C7CGBGBA383824 90-L-075-DC-1-CD-60-R-3-S1-D-GB-GBA-42-42-24 90L075DC1CD60R3S1DGBGBA424224 90-L-075-DC-1-CD-80-R-3-C7-C-GB-GBA-38-38-24 90L075DC1CD80R3C7CGBGBA383824 90-L-075-DC-1-CD-80-R-4-S1-D-GB-GBA-35-35-24 90L075DC1CD80R4S1DGBGBA353524 90-L-075-DC-1-CD-80-R-4-S1-D-GB-GBA-35-35-24-F053 90L075DC1CD80R4S1DGBGBA353524F053 90-L-075-DC-1-CD-80-S-3-S1-D-G8-GBA-35-35-24 90L075DC1CD80S3S1DG8GBA353524 90-L-075-DC-1-CD-80-S-3-S1-E-GB-GBA-42-42-24 90L075DC1CD80S3S1EGBGBA424224 90-L-075-DC-1-CD-80-S-4-S1-D-G8-GBA-35-35-24 90L075DC1CD80S4S1DG8GBA353524 90-L-075-DC-1-CD-80-S-4-S1-D-G8-GBA-42-42-24 90L075DC1CD80S4S1DG8GBA424224 90-L-075-DC-1-NN-60-R-4-T1-D-GB-GBA-29-29-24 90L075DC1NN60R4T1DGBGBA292924 90L075-DC-1-NN-60-S-3-S1-D-GB-GBA-32-32-24 90L075DC1NN60S3S1DGBGBA323224 90-L-075-DC-1-NN-60-S-3-S1-D-GB-GBA-32-32-24 90L075DC1NN60S3S1DGBGBA323224 90-L-075-DC-1-NN-80-L-3-S1-D-GB-GBA-35-35-24 90L075DC1NN80L3S1DGBGBA353524 90-L-075-DC-1-NN-80-P-4-S1-C-GB-GBA-38-38-24 90L075DC1NN80P4S1CGBGBA383824 90-L-075-DC-1-NN-80-P-4-S1-D-GB-GBA-38-38-24 90L075DC1NN80P4S1DGBGBA383824 90-L-075-DC-1-NN-80-P-4-S1-D-GB-GBA-42-42-24 90L075DC1NN80P4S1DGBGBA424224 90-L-075-DC-1-NN-80-R-3-S1-D-GB-GBA-35-35-20 90L075DC1NN80R3S1DGBGBA353520 90-L-075-DC-1-NN-80-R-4-S1-C-G8-GBA-20-32-20 90L075DC1NN80R4S1CG8GBA203220 90-L-075-DC-1-NN-80-S-3-C7-D-GB-GBA-35-35-24 90L075DC1NN80S3C7DGBGBA353524 90-L-075-DC-1-NN-80-S-3-S1-D-GB-GBA-35-35-24 90L075DC1NN80S3S1DGBGBA353524 90-L-075-DC-1-NN-80-S-4-S1-D-GB-GBA-35-35-24 90L075DC1NN80S4S1DGBGBA353524 90L075-DC-5-AB-80-P-4-S1-D-GB-GBA-20-20-20 90L075DC5AB80P4S1DGBGBA202020 90-L-075-DC-5-AB-80-P-4-S1-D-GB-GBA-20-20-20 90L075DC5AB80P4S1DGBGBA202020 90L075-DC-5-AB-80-R-4-C6-D-GB-GBA-42-42-24 90L075DC5AB80R4C6DGBGBA424224 90-L-075-DC-5-AB-80-R-4-C6-D-GB-GBA-42-42-24 90L075DC5AB80R4C6DGBGBA424224 90L075-DC-5-AB-80-S-3-S1-E-GB-GBA-35-35-24 90L075DC5AB80S3S1EGBGBA353524 90-L-075-DC-5-AB-80-S-3-S1-E-GB-GBA-35-35-24 90L075DC5AB80S3S1EGBGBA353524 90L075-DC-5-AB-80-S-4-C7-E-GB-GBA-42-42-24 90L075DC5AB80S4C7EGBGBA424224 90-L-075-DC-5-AB-80-S-4-C7-E-GB-GBA-42-42-24 90L075DC5AB80S4C7EGBGBA424224 90L075-DC-5-AB-80-S-4-S1-E-GB-GBA-35-35-24 90L075DC5AB80S4S1EGBGBA353524 90-L-075-DC-5-AB-80-S-4-S1-E-GB-GBA-35-35-24 90L075DC5AB80S4S1EGBGBA353524 90L075-DC-5-BC-60-S-3-S1-D-GB-GBA-35-35-24 90L075DC5BC60S3S1DGBGBA353524 90-L-075-DC-5-BC-60-S-3-S1-D-GB-GBA-35-35-24 90L075DC5BC60S3S1DGBGBA353524 90-L-075-DC-5-BC-80-R-3-S1-E-G8-GBA-38-38-24 90L075DC5BC80R3S1EG8GBA383824 90-L-075-DC-5-BC-80-S-3-S1-E-G8-GBA-38-38-24 90L075DC5BC80S3S1EG8GBA383824 90L075-DC-5-CD-60-S-3-S1-D-GB-GBA-35-35-24 90L075DC5CD60S3S1DGBGBA353524 90-L-075-DC-5-CD-60-S-3-S1-D-GB-GBA-35-35-24 90L075DC5CD60S3S1DGBGBA353524 90-L-075-DC-5-CD-80-R-3-C6-E-G8-GBA-38-38-24 90L075DC5CD80R3C6EG8GBA383824 90-L-075-DC-5-CD-80-S-3-C6-E-G8-GBA-38-38-24 90L075DC5CD80S3C6EG8GBA383824 90L075-DC-5-NN-60-S-3-C7-D-GB-GBA-42-42-24 90L075DC5NN60S3C7DGBGBA424224 90-L-075-DC-5-NN-60-S-3-C7-D-GB-GBA-42-42-24 90L075DC5NN60S3C7DGBGBA424224 90L075-DC-5-NN-60-S-4-S1-D-GF-GBA-40-40-24 90L075DC5NN60S4S1DGFGBA404024 90-L-075-DC-5-NN-60-S-4-S1-D-GF-GBA-40-40-24 90L075DC5NN60S4S1DGFGBA404024 90L075-DC-5-NN-80-L-4-S1-D-GB-GBA-42-42-24 90L075DC5NN80L4S1DGBGBA424224 90-L-075-DC-5-NN-80-L-4-S1-D-GB-GBA-42-42-24 90L075DC5NN80L4S1DGBGBA424224 90L075-DC-5-NN-80-S-4-S1-E-GB-GBA-35-35-24 90L075DC5NN80S4S1EGBGBA353524 90-L-075-DC-5-NN-80-S-4-S1-E-GB-GBA-35-35-24 90L075DC5NN80S4S1EGBGBA353524 90L075-DC-5-NN-80-S-4-S1-E-GB-GBA-40-40-28 90L075DC5NN80S4S1EGBGBA404028 90-L-075-DC-5-NN-80-S-4-S1-E-GB-GBA-40-40-28 90L075DC5NN80S4S1EGBGBA404028。