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參考下表估取，液壓泵規格大，取大值，反之取小值，定量泵取大值，變量泵取小值。表 液壓泵的總效率液壓泵類型 齒輪泵 螺桿泵 葉片泵 柱塞泵總效率 0.6～0.7 0.65～0.80 0.60～0.75 0.80～0.85②在工作循環中，泵的壓力和流量有顯著變化時，可分別計算出工作循環中各個階段所需的驅動功率，然后求其平均值，即p=式中：t1，t2，…，tn為一個工作循環中各階段所需的時間(s)；P1，P2，…，Pn為一個工作循環中各階段所需的功率(kW)。按上述功率和泵的轉速，可以從產品樣本中選取標準電動機，再進行驗算，使電動機發出最大功率時，其超載量在允許范圍內。二、閥類元件的選擇1.選擇依據選擇依據為：額定壓力，A10VSO45DFR1/31R-PPA12N00(R902427886),
A10VSO45DR/31R-PPA12N00(R910908725),
A10VSO71DFR1/32R-VPB22U99S2183(R902449039),
A10VSO71DFR1/31R-PPA12N00-S16458 CORE(58CC)(R902427855),
A10VSO71DFR1/32R-VPB22U99(R902449040),
A10VSO71DFR1/32R-VPA12N00(R902427855),
A10VSO71DRS/32R-VPB22U999(R902452429),
A10VSO71DFR1/31R-PPA1200-S1486(R902427947),
A10VSO100DRS/32R-VPB1200-S1439(R902436353),
R910945178 A10VSO18DFR1/31R-PPA12N00 軸向柱塞泵
R910925060 A10VSO28DFR1/31R-PPA12N00 軸向柱塞泵
R902452707 A10VSO45DFR1/32R-VPB12N00 
R902452429 A10VSO58DFR1/32R-VPB22U99－S2183 軸向柱塞泵
R902452431 A10VSO71DFR1/32R-VPB22U99-S2184 軸向柱塞泵
R902436353 A10VSO100DRS/32R-VPB12N00-S1439 軸向柱塞泵
R902449059 A10VSO140DRS/32R-VPB22U99 
R900951305 PGH3-2X/016RE07VU2, 
R900932139 PGH4-2X/020RE11VU2, 
R900932140 PGH4-2X/025RE11VU2, 
R900932141 PGH4-2X/032RE11VU2, 
R900086321 PGH4-2X/040RE11VU2, 
R900932159 PGH4-2X/050RE11VU2, 
R901147115 PGH5-3X/063RE11VU2, 
R901147116 PGH5-3X/080RE11VU2, 
R901147117 PGH5-3X/100RE11VU2, 
R901147118 PGH5-3X/125RE11VU2, 
R901147119 PGH5-3X/160RE11VU2,
90 軸向柱塞泵18ml/r A10VSO18DFR1/31R-PPA12N00
91 軸向柱塞泵28ml/r A10VSO28DFR1/31R-PPA12N00
92 軸向柱塞泵45ml/r A10VSO45DFR1/32R-VPB12N00A10VSO45DFR1/31R-PPA12N00
93 軸向柱塞泵58ml/r A10VSO58DFR1/31R-PPA12N00A10VSO58DFR1/32R-VPB22U99-S2183
94 軸向柱塞泵71ml/r A10VSO71DFR1/31R-PPA12N00A10VSO71DFR1/32R-VPB22U99-S2184
95 軸向柱塞泵100ml/r A10VSO100DFR1/32R-VPB12N00-S1439
96 軸向柱塞泵140ml/r A10VSO140DFR1/32R-VPB12N00A10VSO140DFR1/31R-PPB12N00
A10VSO系列 液壓變量柱塞泵 
A10VSO28DFLR/31R-PPA12N00
A10VSO28DFLR/31R-PPA12N00 
A10VSO28DFLR/31R-PPA12N00
A10VSO28DFLR/31R-PPA12N00力士樂Rexroth
A10VSO28DFLR/31R-PPA12N00
A10VSO28DFR/31R-PPA12N00 
A10VSO28DFR1/31R-PPA12K01
A10VSO28DFR1/31R-PPA12N00力士樂Rexroth
A10VSO28DR/31R-PPA12K01
A10VSO28DR/31R-PPA12N00 
A10VSO45DFLR/31R-PPA12N00
A10VSO45DFLR/31R-PPA12N00力士樂Rexroth
A10VSO45DFLR/31R-PPA12N00
A10VSO45DFLR/31R-PPA12N00 
A10VSO45DFLR/31R-PPA12N00
A10VSO45DFR/31R-PPA12K01 力士樂Rexroth
A10VSO45DFR/31R-PPA12K26
A10VSO45DFR/31R-PPA12N00 
A10VSO45DFR1/31R-PPA12K02
A10VSO45DFR1/31R-PPA12N00 力士樂Rexroth
A10VSO45DR/31R-PPA12N00
A10VSO71DFLR/31R-PPA12N00 
A10VSO71DFLR/31R-PPA12N00
A10VSO71DFLR/31R-PPA12N00 力士樂Rexroth
A10VSO71DFLR/31R-PPA12N00
A10VSO71DFLR/31R-PPA12N00 
最大流量，動作方式