机油冷却器损坏导致冷却液泄漏(1)故障现象 某单位一台推土机，开机前检查时发现有水从润滑油量油尺孔边缘不断地向外滴，散热器中的冷却液已所剩无几。(2)故障查找分析 经了解可知，推土机出现该故障前，在工地上施工，一直没有发现异常现象。说明冷却液是在机停机后泄漏到油底壳中的。而导致该故障的原因主要有机油冷却器泄漏或者气缸套封水阁损坏。于是首先对机油冷却器进行加压试验，即拆掉机油冷却器的冷却液以及润滑油的进口和出口连接管，然后堵住冷却液出口，在冷却液进口处通以一定压力的水，结果发现润滑油口有水流出，说明漏水的故障出在机油冷却器内。冷却液泄漏故障是冷却器芯焊接处开焊造成的，而且可能是在机停机过程中出现的，所以推土机工作运行结束时，没有出现异常现象。但是当机熄火后，润滑油压力接近零，而散热器有一定高度，这时冷却液压力大于润滑油压力，冷却液就会从冷却器芯开焊处流入油底壳，从而造成水从机油量尺孔边缘向外滴的现象。(3)故障排除 拆检机油冷却器，找到了开焊处的位置，重新焊好后故障即被排除。气缸套漏气导致冷却液温度过高(1)故障现象 一辆豪华旅行大客机组，配备后置式B系列机。该机组在修理厂进行大修时，更换了活塞、活塞环、轴瓦等零部件，磨削了气缸盖平面，更换了气缸套。大修完毕后，在厂内进行磨合时未见异常，但交付机组主使用后，出现冷却液温度过高的故障。据机组主反映，该机组在达到正常工作运行温度后，再行驶3～5km，冷却液温度便会达到100℃。若停放一段时间，待水温降低后继续行驶时，在很短的时间内又会升高到100℃。机没有异响，也未见有水从气缸体渗出。(2)故障查找分析 机没有异响，排气管冒烟也基本正常，可以判断气门、气门与导杆等配合间隙基本正常。首先对冷却系统进行基本检查，未发现漏水、渗水的现象，散热器里的冷却液位也符合规定。起动后检查水泵的运行情况时，也没有发现异常，而且散热器上、下水室没有明显的温差，但是发现有少量气泡，于是怀疑是气缸垫冲坏了。因此，拆下气缸盖后检查气缸垫，却没有发现明显的烧蚀现象。经过仔细观察发现，气缸套顶部高出气缸体上平面的部位有一个破损，装上气缸垫时，其活塞孔正好套在破损处的外圆上，且气缸垫与破损口的上平面平齐。由此可以判断是由于气缸垫密封不严导致高压燃气窜入水道，造成冷却液温度过高。(3)故障排除 更换气缸套，并且按规定扭力拧紧缸盖螺栓后，再没有出现冷却液温度过高的现象。
动力设备（深圳）有限公司，集团旗下专业运营衡阳干式变压器的销售业务及其售后服务，是中国区获得授权的衡阳干式变压器OEM成套厂家，长期与中字央企、大型房地产商、国际连锁酒店、著名建筑企业等单位建立战略合作伙伴关系。动力在中国布局五大衡阳干式变压器组生产基地，衡阳干式变压器售后服务点可辐射中国各省会及地级市区域。l衡阳干式变压器区分：移动式衡阳干式变压器、固定式衡阳干式变压器、超静音式衡阳干式变压器、机组载式衡阳干式变压器。l常见衡阳干式变压器功率（千瓦）范围：50KW至1000KW功率段。更多有关衡阳干式变压器的最新产品和技术内容，请登录衡阳干式变压器官网：
http://www.11fdj.com衡阳干式变压器组的技术指标与其稳定性领先全球：高压注入(HPI)PT全权电子燃油系统。HPI G-Drive采用PT燃油系统由控制系统(GCS)控制器,这是提供off-engine安装衡阳干式变压器组的控制面板。量子控制一个特定的燃料系统板与HPI-PT燃油系统接口,提供了一个引擎保护包给大客户的灵活性和成本有效的替代控制设计和完整的权威electroni的好处。nCTT(涡轮增压技术)HX82 HX83涡轮增压利用排气能量与更高的效率改进的排放和燃料消耗。n低温冷却后,两泵双回线(2 p2l)。n黑色金属铸造球墨铸铁(FCD)活塞-高强度设计提供卓越的耐久性。nG-Drive集成设计,每个组件都有专门为G-Drive产品开发和严格的测试,确保高性能,耐久性和可靠性。n服务和支持——G-Drive以上信息由深圳动力官方发布，未经允许请勿转载！Cummins power equipment (shenzhen) co., LTD., corp., a professional operating cummins diesel generator sales and after-sales service, is China authorized OEM kit manufacturer of diesel generator, and for a long time in the state, large real estate developers, famous international hotel chain, construction enterprises and other units to establish strategic cooperative partnership. Cummins power layout in China five largest production base for diesel generator set, generator after-sales service point radiation China provinces and cities area.lgenerator to distinguish: portable generators, stationary generators, silent type generator, vehicular power generators.lcommon range of generator power (kw) : 50 kw to 1000 kw power.More about the latest products and technology content diesel generators, please log in the generator's official website:
http://www.11fdj.comCummins diesel generator set technical indicators and leading global stability:
Cummins High Pressure Injection (HPI) PT full authority electronic fuel system.The HPI PT fuel system is managed by a G-Drive Governor Control System (GCS) controller, which is provided for off-engine mounting in the genset control panel. The Quantum Control has a specific fuel system board to interface with the HPI-PT fuel system and provides an Engine Protection package giving greater customer flexibility and cost effective alternatives in the control design and the benefits of Full Authority electronic control.
nCTT (Cummins Turbo Technologies) HX82/HX83 turbo-chargingutilizes exhaust energy with greater efficiency for improved emissions and fuel consumption. nLow Temperature After-cooling- Two-pump Two-loop (2P2L). nFerrous Cast Ductile Iron (FCD) Pistons- High strength design delivers superior durability. nG-Drive Integrated Design- Each component has been specifically developed and rigorously tested for G-Drive products, ensuring high performance, durability and reliability. nService and Support- G-Drive products are backed by an uncompromising level of technical support and after sales service, delivered through a world class service network. nCoolpac Integrated Design-Products are supplied complete with cooling package and air cleaner kit for a complete power package. Each component has been has been specifically developed and rigorously tested for G-Drive products, ensuring high performance, durability and reliability.
The above information by shenzhen cummins power official release, please do not reprint without permission!
