供应力士乐Rexroth柱塞泵R902449077 A10VSO140DR/31R-PPB12N00现货
我们知道柱塞泵可以分为变量泵和定量泵,为了满足客户随时调整排量的需求,从未停止过变量泵的研发。控制柱塞泵实现变量的目的是控制泵速或调节泵排量。当通过改变液压泵的排量V(几何参数)来调节流量时,当泵的转速不变时,泵的排出流量发生变化,从而形成流量控制泵。
变量柱塞泵有什么特点?
1、闭环液压传动用斜盘型轴向柱塞变量泵;
2、流量与驱动速度和排量成正比,可以无限变化;
3、流量随着斜盘的摆动角度从零增加到峰值。
4、通过在中间位置摆动斜盘,可以平稳地改变液体流动的方向。
5、易于与各种控制和调节系统匹配的多变量模式;
6、泵在高压油侧配有两个溢流阀,以保护静液压传动装置(泵和马达)免受过载;
7、高压溢流阀还具有补油阀的功能;
8、内置辅助泵用作补给泵和控制泵;
9、高补给压力受到内置补给溢流阀的限制;
10、整个系列都有内置压力切断阀。力士乐变量柱塞泵的控制方法和特点与上述基本相同。
博世力士乐rexroth轴向柱塞泵 博世力士乐rexroth液压泵 力士乐油泵
柱塞泵是液压系统的一个重要装置。它依靠柱塞在缸体中往复运动,使密封工作容腔的容积发生变化来实现吸油、压油。柱塞泵具有额定压力高、结构紧凑、效率高和流量调节方便等优点,被广泛应用于高压、大流量和流量需要调节的场合,诸如液压机、工程机械和船舶中。
中文名柱塞泵机械分类单柱塞泵机械分类卧式柱塞泵机械分类轴向柱塞泵机械分类径向柱塞泵广泛应用高压、大流量和流量需要调节
柱塞泵一般分为单柱塞泵、卧式柱塞泵、轴向柱塞泵和径向柱塞泵。
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1.泵的轴线与电机的轴线虚保持一定的同轴度。对于齿轮泵,泵的转动轴与电机输出轴之间的安装采用弹性联轴节,其不同轴度不得大于O.1mm,采用轴套式联轴节的不同轴度不得大于0.05mm;对于叶片泵,一般要求不同轴度不得大于0.1mm,且与电机之间应采用挠性连接;同样对于斜盘式轴向安装精度也提出具体要求:
(1)支座安装的斜盘式轴向泵,其同轴度检查允差事=0.1mm;
(2)采用法兰安装时,安装精度要求其芯轴径向法兰同轴度检查公差为西=0.1mm:法兰垂直度检查允差t=0.1mm;
(3)采用轴承支架安装皮带轮或齿轮,然后通过弹性联轴节与泵联接,来保证泵的主动轴不承受径向力和轴向力。可以允许承受的力应严格控制在许用范围内,特殊情况下还要对转子进行精密的动平衡实验,以尽量避免共振。
2.滤器的安装
为避免泵抽空,严禁使用精密过滤器。对于齿轮泵的过滤精度应≤40um,在吸油口常用网式过滤器。对于叶片泵,柱塞泵,油液的清洁度应达到国家标准等级16/19级,使用的过滤器精度大多为25~30um。吸油口过滤器的正确选择和安装,会使液压故障明显减少,各元件的使用寿命可大大延长。
3.配管的安装要求
(1)进油管的安装高度不得大于O.5m。进油管必须清洗干净,与泵进油口配合的油泵紧密结合,必要时可加上密封胶,以免空气进入液压系统中。
(2)进油管道的弯头不宜过多,进油管道口应接有过滤器,过滤器不允许漏出油箱的油面。当泵正常运转后,其油面离过滤器顶面至少应有100mm,以免空气进入,过滤器的有效通油面积一般不低于泵进油口油管的横截面积的50倍,并且过滤器应经常清洗,以免堵塞。(3)吸入管,压出管和回油管的通径不应小于规定值。
(4)泵的泄漏回油管不宜与液压系统其他回油管联在一起,应单独并插入油箱液面以下。
(5)为了防止泵的振动和噪声沿管道传至系统,在泵的吸入口和压出口可各安装一段软管,但压出口软管应垂直安装,长度不应超过400~600mm,吸入口软管要有一定的强度,避免由于管内有真空度而使其出现变扁现象。