水泥厂用叶片泵PV7-1A/16-20RE01MC0-16

水泥厂用叶片泵PV7-1A/16-20RE01MC0-16 水泥厂用叶片泵PV7-1A/16-20RE01MC0-16，德国力士乐REXROTH叶片泵；
液压系统导致液压泵过热原因有：
一、液压泵装配不良导致液压泵异常发热：
①液压泵中的间隙在选配时不合适(例如柱塞与缸体、叶片与转子槽、定子与转子、齿轮与侧板等配合间隙过小等都会造成滑动部位过热烧伤)。
②液压泵的装配质量差，传动部分同轴度没有达到技术要求，在液压泵运转的时候有别劲的现象怠敞糙缎孬等茬劝长滑出现。
③液压泵中轴承的质量差或是在装配的时候被打坏，或是在液压泵安装的时候没有清洗干净，造成液压泵在运转时别劲。
④经过轴承的润滑油排油口不畅通:由于回油口螺塞未打开(未接管子)，或是在安装的时候通油道没有清洗干净，导致有脏物绪住油口，还有可能是由于在安装时回油管弯头太多或有压扁的现象，导致排油口不通畅。
二、液压泵油液质量差所导致液压泵异常发热：
①在液压泵中使用的油液黏度与温度的特性差，在使用过程中黏度变化差很大。
②使用的液压油中含有大量水分，造成液压油的润滑不良，导致液压泵异常发热。
③长期没有更换液压泵中的油液，或是使用的液压油已被污染严重，导致液压泵发热。
三、液压泵管路故障导致液压泵发热：
①连接液压泵的泄油管被压扁或被堵死，导致无法泄油而使油泵发热。
②液压泵的排油管管径太细，不能使液压泵顺畅的排出油液，达不要排油要求。
③液压泵的吸油管径小，使得液压泵的吸油阻力大，无法正常吸油，导致油泵发热。

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齿轮泵的主要优点是结构简单，体积小，质量轻，工艺性好，价格便宜，自吸能力强，对油液污染不敏感，转速范围大，维护方便，工作可靠。它的缺点是困油现象严重，径向不平衡力大，泄漏大，流量脉动大，噪声较高，不能做变量泵使用。低压齿轮泵广泛地应用在低压(25×105pa以下)的液压系统中，如机床以及各种补泊、润滑和冷却装置等。齿轮泵在结构上采取一定措施后，也可以达到较高的工作压力。中压齿轮泵主要应用于机床、国轧钢设备的液压系统中。中高压和高压齿轮泵主要用于农林机械工程机械、船舶机械和航空技术中。

和齿轮泵一样，齿轮液压马达由于密封性差，容积效率较低，所以输入的油压不能过高，因而不能产生较大的转矩，并且转速和转矩都是随着齿轮啮合情况而脉动的。齿轮液压马达多用于高转速低转矩的液压系统中。齿轮泵一般都可以直接作液压马达使用，即齿轮泵与齿轮液压马达二者是可逆的。

和齿轮泵相比，叶片泵有流量均匀、运转平稳、噪声小、寿命长，轮廓尺寸较小、结构较紧凑等优点，但也存在着自吸能力差、调速范围小、转速较低、叶片容易咬死、工作可靠性较差、结构较复杂、对油液污染较敏感等缺点。因此在工作环境较污秽、速度范围变化较大的机械上应用相对较少。在工作可靠性要求很高的地方，如飞机上，也很少应用。叶片泵在中，低压液压系统尤其在机床行业中应用多。其中单作用式叶片泵常做变量泵使用，其额定压力较低()，常用于组合机床，压力机械等;双作用式叶片泵只能做定量泵使用，其额定压力可达14MPa~21MPa，在各类机床(尤其是精密机床)设备中，如注塑机、运输装卸机械及工程机械等中压系统中得到广泛应用。叶片液压马达大的优点是体积小、惯性小，动作灵敏，允许换向频率很高、甚至可在几毫秒内换向。但其大的弱点是泄漏较大，机械特性较软，不能在较低转速下工作，调速范围不能很大。因此适用于低转矩，高转速及对惯性要求较小，对机械特性要求不严的场合。由于变量叶片液压马达结构较复杂，相对运动部件多、泄漏较大，容积效率低，机械特性软及调节不便等原因，叶片液压马达一般都制成定量式的，即一般叶片液压马达都是双作用式的定量液压马达。

柱塞泵(液压马达)由于构成密封工作腔的构件一一柱塞和缸体内孔均为圆柱表面，加工方便，容易得到较高的配合精度，密封性好，故容积，工作压力高。同时这种泵只要改变柱塞的行程就可以很方便的改变其流量，易于实现变量。因此柱塞泵在高压、大流量、大功率的液压系统中和流量需要调节的场合，如龙门刨床、拉床、液压机、工程机械、矿山机械、船舶机械等场合得到广泛应用。

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