力士樂葉片泵 PV7-1X/25-45RE01MC0-08

力士樂葉片泵R900534508 PV7-1X/25-45RE01MC0-08

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葉片泵

雙作泵工作原理:它由定子、轉(zhuǎn)子、葉片和配油盤等組成。定子內(nèi)壁近似橢圓形。葉片安裝在轉(zhuǎn)子徑向槽內(nèi)并可沿槽滑動,轉(zhuǎn)子與定子同心安裝。當(dāng)轉(zhuǎn)子轉(zhuǎn)動時,葉片在離心力的作用下壓向定子內(nèi)表面，并隨定子內(nèi)表面曲線的變化而被迫在轉(zhuǎn)子槽內(nèi)往復(fù)滑動，相鄰兩葉片間的密封工作腔就發(fā)生加大和縮小的變化。葉片由小半徑圓弧向大半徑圓弧處滑移時,密封工作腔隨之逐漸加大形成局部真空，于是油箱中油液通過配油盤上吸油腔吸入;反之將油壓出。轉(zhuǎn)子每轉(zhuǎn)一-周 ，葉片在槽內(nèi)往復(fù)滑移2次,完成2次吸油和2次壓油,并且油壓所產(chǎn)生的徑向力是平衡的,故稱雙作用式,也稱平衡式。

性能特點

葉片泵壓力脈動小，因磨損而產(chǎn)生的工作壓力下降車小運轉(zhuǎn)平穩(wěn)、噪音較小，結(jié)構(gòu)緊湊，起動轉(zhuǎn)矩小。但吸人條件較差，運動部件的工作可靠性較低。

1.流量較均勻，運轉(zhuǎn)平穩(wěn)，噪聲較低。

2.雙作用葉片泵轉(zhuǎn)子所受徑向力是平衡的，軸承壽命長;它的內(nèi)部密封性也較好，容積效率較高;因此，一般額定排出壓力較高，可達(dá)7MPa左右。

3.結(jié)構(gòu)緊湊，尺寸較小而流量較大。

4.對工作條件要求較嚴(yán)。葉片抗沖擊較差，較容易卡住，對油液的清潔程度和粘度都比較敏感。端面間隙或葉槽間隙不合適都會影響正常工作。轉(zhuǎn)速一-般在500~2000r /道范圍內(nèi)，太低則葉片可能因離心力不夠而不能壓緊在定了表面，而太高則吸人時會產(chǎn)生“氣穴現(xiàn)象”；

5.結(jié)構(gòu)較復(fù)雜，零件制造精度要求較高。

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