力士乐液压泵A4VSO71DR 10R-PPB13N00

力士乐液压泵A4VSO71DR 10R-PPB13N00

联系人：黄经理

电话：0592-5325131

手机：15359881496

传真：0592-5325131   

Q Q： 632512028

地址：福建省厦门市思明区嘉禾路337号中关委大厦1508室

福建速凌机械设备有限公司于2004年成立在厦门，公司有专门渠道从事德国、美国及欧洲的各类工业产品、工控自动化及各类气动元件备品备件经销，特别是厂家平时难于购买到的特shu设备产品。

常用液压泵的种类：

1、按流量是否可调节可分为：变量泵和定量泵。输出流量可以根据需要来调节的称为变量泵，流量不能调节的称为定量泵。

2、按液压系统中常用的泵结构分为：齿轮泵、叶片泵和柱塞泵3种。

齿轮泵：体积较小，结构较简单，对油的清洁度要求不严，价格较便宜；但泵轴受不平衡力，磨损严重，泄漏较大。

0510225006力士乐齿轮泵

齿轮泵按齿轮啮合形式分：

(l)外啮合式;(2)内啮合式。

外啮合齿轮泵的优点是结构简单、尺寸小、重量轻、制造维护方便、价格低廉、工作可靠、自吸能力强、对油液污染不敏感等。它的不足是齿轮承受不平衡的径向液压力，轴承磨损严重，泄漏量大。工作压力的提高受到径向液压力和容积效率的限制;流量脉动大，噪声高。

内啮合齿轮泵结构紧凑、尺寸小、重量轻。由于齿轮同向旋转，齿面相对滑动速度小、磨损轻微、使用寿命长、流量脉动远比外啮合齿轮泵小，因而噪声比较小。内啮合齿轮泵允许使用较高的转速，可获得较高的容积效率。

叶片泵：

分为双作用叶片泵和单作用叶片泵。这种泵流量均匀、运转平稳、噪音小、作压力和容积效率比齿轮泵高、结构比齿轮泵复杂。

柱塞泵：容积效率高、泄漏小、可在高压下工作、大多用於大功率液压系统；但结构复杂，材料和加工精度要求高、价格贵、对油的清洁度要求高。

一般在齿轮泵和叶片泵不能满足要求时才用柱塞泵。还有一些其他形式的液压泵，如螺杆泵等，但应用不如上述3种普遍。 

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