德國力士樂齒輪泵由一個獨立的電機驅動，可有效地阻斷上游的壓力脈動及流量波動。在齒輪泵出口處的壓力脈動可以控制在1%以內。在擠出生產線上采用一臺齒輪泵，可以提高流量輸出速度，減少物料在擠出機內的剪切及駐留時間。
外齒合齒輪泵是應用*泛的一種齒輪泵，一般齒輪泵通常指的就是外嚙合齒輪泵。它的結構如圖1所示，主要有主動齒輪、從動齒輪、泵體、泵蓋和安全閥等組成。泵體、泵蓋和齒輪構成的密封空間就是齒輪泵的工作室。兩個齒輪的輪軸分別裝在兩泵蓋上的軸承孔內，主動齒輪軸伸出泵體，由電動機帶動旋轉。外嚙合齒輪泵結構簡單、重量輕、造價低、工作可靠、應用范圍廣。
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