REXROTH葉片泵安裝不當。兩帶輪中心距太小或兩軸不太平行，傳動帶緊邊安裝到上面，致使包角太小，兩帶輪直徑計算差錯以及聯軸傳動水泵兩軸偏心距較大等，均會造成水泵轉速變化。 REXROTH葉片泵本身機械故障。葉輪與泵軸緊固螺母松脫或泵軸變形彎曲，造成葉輪多移，直接與泵體摩擦，或軸承損壞，都有可能降低水泵轉速。 動力機維修不錄。電動機因繞組燒毀，而失磁，維修中繞組匝數、線徑、接線方法改變，或維修中故障未*排除因素也會使水泵轉速改變。 REXROTH葉片泵工作前，先將泵內充滿液體，然后啟動離心泵，葉輪快速轉動，葉輪的葉片驅使液體轉動，液體轉動時依靠慣性向葉輪外緣流去，同時葉輪從吸入室吸進液體， REXROTH力士樂葉片泵在繞流運動中液體作用一升力于葉片，反過來葉片以一個與此升力大小相等、方向相反的力作用于液體，這個力對液體做功，使液體得到能量而流出葉輪，這時液體 的動能與壓能均增大。 上海維特銳在德國與REXROTH合作，可長期穩定供應力士樂葉片泵，力士樂電磁閥，REXROTH導軌，力士樂柱塞泵等產品 R900618143 PV7-2X/20-20RA01MA0-10-A416 R900598753 PV7-1X/10-14RE01MC3-16
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