(1)故障现象 一台山东推土机总厂生产的TY220型推土机，机的散热器在使用过程中经常有喷水现象，使冷却水迅速减少，并产生高温，无法正常工作运行。(2)故障查找分析 对该机进行大修时，曾更换了缸套、气缸垫、风扇传动带、水泵易损件和节温器，并对散热器内部进行了彻底的清洗，对缸盖进行了水压密封试验，均未发现异常现象。但在试机时，仍出现喷水现象。针对上述故障，对该机的冷却系统进行了认真分析。该机所用NT—855型机，冷却系统采用独特的膨胀水箱。散热器的上水室被隔板5分成两部分，一部分为膨胀水箱。膨胀水箱由两根细中心管(除气管)2与散热器上水室相连通。膨胀水箱顶部设有加水管口，管下部有一小孔，该孔限制了冷却水的膨胀高度。膨胀室的右上方装有空气蒸气阀，它可以使膨胀水箱内的压力保持在49kPa，冷却水沸点111.7℃。当膨胀水箱内的压力高于49kPa时，空气一蒸气阀开启并排气，当箱内的压力低于大气压时，空气—蒸气阀也能开启并吸气。装有上述膨胀箱的NT—855型机冷却系统。由图可见，膨胀水箱与水泵吸水侧通过平衡管相连通，可以防止该处的冷却水产生较大的负压，防止汽蚀现象。缸盖出水管的一端有除气管与膨胀水箱相连接。除气管和两根细中心管能有效地分离水中的蒸汽和空气。在系统压力的作用厂，气(或蒸汽)水混合物从膨胀水箱上部的除气口进入。在正常情况下，除气口与膨胀水箱中储备的冷却液的液面总保持一定的距离。气(或蒸汽)水混合物在降落过程中，大的气泡膨胀破裂另外，小的气泡随冷却液落入储备的冷却液中，由于气泡比水轻，会向行向上运动，最终越出液面，进入膨胀空间，实现气水分离，并产生使系统释压的作用。膨胀空间中的蒸汽在适当的强度下冷凝，重新进到冷却液中参加循环。针对该机出现的故障现象，先排除了缸盖与缸体之间漏气、缸套断裂、传动带打滑、水泵性能不良引起故障的因素，重点对水箱上部的膨胀水箱进行了充气密封试验。实验结果发现，隔板上有许多针眼状的气孔，因此造成了漏气现象，破坏膨胀水箱独特的气、水分离作用。这样，就加剧了冷却系统的气阻现象，减少了水泵的出水量，造成冷却系统的高温。(3)故障排除 更换散热器中的隔板后，装配试机，此故障排除。
动力设备（深圳）有限公司，集团旗下专业运营中卫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中卫干式变压器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中卫干式变压器组生产基地，中卫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中卫干式变压器区分：移动式中卫干式变压器、固定式中卫干式变压器、超静音式中卫干式变压器、机组载式中卫干式变压器。l常见中卫干式变压器功率（千瓦）范围：50KW至1000KW功率段。更多有关中卫干式变压器的最新产品和技术内容，请登录中卫干式变压器官网：
http://www.11fdj.com中卫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安装中卫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:
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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.
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