力士乐管道冲洗规范.doc

FLUSHING HYDRAULIC SYSTEM冲洗液压系统During the assembly and installation of extensive hydraulic system with many pipe runs ,it is easy possible for dirt and other contamination to find their way into the pipes and other items of equipment. Therefore , it is necessary with such system to flush out all the contamination ,so that it cannot have an adverse effect on the operation and life of the equipment.在装配期间和安装大量的液压系统有许多管道运行时，它很容易使污物和其他污染找到出路的管道和其他设备。因此，非常有必要与这些系统，以清除所有的污染，因此，它不能产生不利影响设备的操作和寿命。Flushing involves circulating hydraulic fluid through the system at high speed. The fast-flowing fluid carries the particles of dirt along with it to where they can eventually be removed in a separate filter circuit.法拉盛涉及循环液压油通过该系统在高速。快速流动的液体中颗粒的泥土连同它在那里他们可以最终被取消，一个单独的滤波电路。The duration and intensity of flushing depend on the cleanliness of system required.时间和强度的冲厕取决于系统的清洁需要。1. Preparing the System for Flushing 1、编写冲洗系统Any part of the system that could be damaged by the flushing must either be replaced by suitable device or be by-passed using pipes or hoses. If necessary , isolate certain units of the system and flush them individually.任何部分的系统，可破坏的冲厕必须是合适的设备所取代或绕过使用管道或软管。如果有必要，孤立某些单位的制度和冲洗，并个别。Venting valves must be provided at high points in the pipework system in order to be certain that the pipes and equipment are completely full of fluid.排气阀门必须提供在高点，管道系统，以确定管道和设备是完全充分的流体。Drains must be provided at low points an in dead legs so that any dirty fluid can be drained off.排水沟必须提供一个在低分在死亡的腿，使任何肮脏的流体可以耗尽了。2. Flushing Unit2 、冲洗单元Flushing unit comprises pumps , heater, filters , tank and the necessary connections.冲洗单元包括泵、加热器、过滤器、水箱和必要的连接The pumps must be fitted with adjustable pressure relief valves which must be set to a pressure which ensure that the full volumetric flow of the pumps is being passed through the parts being flushed. The capacity of the tank should be at least three times the pump delivery per minute. It should also be at least equal in capacity to the capacity of the installation being flushed.泵必须配备可调压力释放阀，必须设置为压力，确保全面流量水泵正在通过部分被刷新。的能力，坦克应至少3倍的泵提供每分钟。还应当至少享有平等的能力的能力，正在安装冲洗。3. Flushing Velocity and Temperature3 、冲洗的速度和温度Flushing Velocity and temperature should be as high as possible for the quick and effective flushing of the hydraulic system.冲洗的速度和温度应尽可能高，以便迅速而有效的冲洗液压系统。Practical experience has shown that the temperature should be higher than the operating temperature if possible. In the case od mineral oils 60 is recommended.The flow velocity should be at least twice that during normal operation of the installation and the flow should be in turbulent range at all points.实际经验表明，如果可能的话温度应高于工作温度。矿物油建议60 。 流速应至少超过两倍在正常运作的情况下安装，流速应当在所有各点紊流的范围。The minimun volumetric flow of fluid through a pipe necessary to achieve turbulent flow conditions is defined as :最小流量的流体通过管道必须实现湍流条件下的定义为： V dRe = - 4000 Q 0.9 d Where Re = Reynold s number V = Flow velocity Q = Volumetric flow in L / min d = Inside diameter of pipe in mm = Viscosity in mm2 / s 4. Flushing Fluid4 、冲洗液The type of flushing fluid used must be compatible with the fluid eventually to be used in the system and with the materials used in the system ,especially the seals .该类型的冲洗液使用必须符合流体最终系统中采用的材料和使用的系统，特别是蜜封件。Although the same fluid to be used subsequently can be used for flushing , a lower viscosity flushing fluid with no expensive additives can flush a system more quickly and more cheaply.虽然同样的液体，用于随后可用于冲洗，低粘度冲洗液（没有添加昂贵的添加剂）可以冲水系统更快速，更便宜。5. The Flushing Procedure 5 、冲刷程序The flushing fluid should be introduced into the tank of the flushing unit through a filter.在冲洗液应通过一个过滤器引入到装有冲洗液的箱体内。Then heat the fluid to the required temperture and start the flushing pump . Ensure that the hydraulic system is properly vented .然后加热流体到所需的温度。启动冲洗泵。确保液压系统是正确工作。While flushing is in progress keep a close watch on the clogging indicators of the filters . so that the elements can be changed or cleaned at the right time .虽然冲洗正在取得进展密切留意指标的堵塞的过滤器。这样的内容可以更改或清除在正确的时间。It is advisable to reverse the direction of flow after about an hour of flushing . Flushing should be continued untill the filter blockage indicators have been showing nothing for more than an hour . The flow should be reversed again . Take fluid sample from the system and see whether the required cleanliness of fluid has been achieved.可取的做法是，逆向流动的方向大约一个小时后的冲厕。法拉盛应该继续下去，直至过滤阻塞指标已经显示没有一个多小时。流动应颠倒过来了。考虑流体样品的系统，看看是否需要清洁液已取得的成绩。Make sure that all circuits comprising the hydraulic system are flushed .确保所有电路组成的液压系统的冲洗。When flushing is complete ensure that residual fluid is removed from any dead legs .当冲洗确保完成剩余的液体是从任何人的腿。Obviously ,any by-passes and other auxiliary devices that have been fitted solely for the purposes of flushing must ben removed again afterwards. So that the hydraulic system is then restored to its fully functioning state .显然，任何由通行证和其他辅助设备已安装只是为了本冲厕必须删除后再次。这样，液