译文：
大型水泵机组的维修性直接影响维修时间、维修质量和维修费用.确定了水泵机组维修性的五要素:维修对象,规定条件,规定程序和方法,规定时间,规定功能;明确了开展水泵机组维修性研究的必要性.调查了大型水泵机组的常见故障,分析了水泵机组维修性的影响因素,比较了不同结构形式水泵机组维修性特点,提出了提高水泵机组维修性的措施.结果表明:电机推力瓦烧损、水泵导轴承失效和水泵汽蚀是大型水泵机组的主要故障形式和具体维修对象;立式半井筒式机组具有较好的维修性。 水泵机组属于可维修系统,评价其使用性能,不仅要评价其运行效率高低,而且还应评价其可靠性指标.可靠性指标除了要求机组运行时具有较高的可靠性外,还要求在机组发生故障时,能在较短时间内、一定条件下(包括人力、人员技术水平、备件、工具设备等),较经济地对水泵机组进行维修,恢复良好的工作状态,即要求水泵机组具有较好的维修性。广义的可靠性包括维修性。 1、大型水泵机组的维修性要素 1.1、维修性要素 维修性是指产品便于维修的特性.维修性的好坏,主要取决于产品的维修性设计水平.对于大型水泵机组,维修性是指水泵机组在规定条件下,在规定的时间内,按规定的程序和方法进行维修时,保持或恢复其规定良好状态的能力.当以概率来表示和度量这种能力时,即为维修度.水泵机组维修性有五个要素: ①“维修对象”,包括水泵、电动机、传动装置等设备. ②“规定条件”,主要指维修性体制、维修的机构和场所、维修人员的维修水平和维修的工具与仪器、设备、技术资料等条件. ③“规定程序和方法”,是按技术文件规定的维修工作类型、步骤和方法. ④“规定时间”,指规定维修时间. ⑤“规定功能”,指水泵机组维修能够实现抽水并达到规定流量、扬程和效率的预期功能. 维修性工程可定义为:为了达到产品的维修性要求所进行的一系列设计、研制、生产和试验工作.实际上维修性工程除了维修性要求的论证与确定之外,还包括维修性的监督与控制、维修性的设计与分析和维修性的试验与评定等,其任务就是提高产品维修性. 1.2、开展水泵机组维修性研究的必要性 维修性研究在我国起步较晚,与发达国家差距仍然较大.目前,我国开发的维修系统远达不到国际水平,制造的机械设备需维修周期短,停工时间长,大修比例高,维修费用高,造成了巨大的人力,物力和财力的损失.大型水泵机组的维修性关系到大型泵站抗旱、排涝、调水功能能否正常发挥,关系到人民生命财产的安全.特别是南水北调东线工程,投资量大,影响面广,梯级泵站机组平均年运行时间都在5000～6000h,运行时间长,维修时间短,维修任务重.如果某一级泵站水泵机组出现故障,抽水流量不能得到保证,则将影响到其他阶梯泵站乃至整个调水工程的正常运行.因此,水泵机组的可靠维修性是首先要考虑的问题。 限于篇幅，文章第二、三、四章节的部分内容省略，详细文章请邮件至作者索要。 5、结论 大型水泵机组的维修性直接影响维修时间、维修质量和维修费用.大型水泵机组故障形式主要有:电机推力瓦烧损,水泵导轴承磨损,水泵汽蚀等.立式半井筒式水泵机组具有较好维修性.应从维修可达性、可检测性和维修体制等方面提高和改善水泵机组的维修性。

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原文：
Large water pump repair of a direct impact on time to repair, maintenance quality and maintenance costs. To determine the pump unit for maintenance of the five elements: the maintenance of object, specified conditions, the prescribed procedures and methods require time, according to function; clear to carry out water pump repair research necessary. survey of the common faults of a large water pump, water pump repair analysis of influencing factors to compare different structural form water pump repair character, proposed raising the water pump repair measures. The results show that: Electrical Thrust tile burning, pump guide bearing failure and pump cavitation is a major failure of large water pump repair forms and specific objects; vertical half-shaft turbine with a good maintainability. Water Pump belong to the maintenance system, uating its use performance, not only to uate the level of operational efficiency, but also uate the reliability indices. Reliability index in addition to urging unit run-time with high reliability, and also required the unit took place failure can be in a relatively short period of time under certain conditions (including manpower, personnel skills, spare parts, tools, equipment, etc.) and more economical way of water pump repair, restore good working condition, which would require water pump has a good Maintainability. A broad sense, including the maintenance of reliability. A large water pump repair of the elements 1.1, maintenance of the elements Maintainability refers to the product easy maintenance features. The maintenance of good or bad, depending on the maintenance of the product design level. For large pump units, Maintainability refers to the water pump under the conditions specified in the specified time, according to the provisions of The procedures and methods for maintenance, to maintain or restore the capacity of its provisions in good condition. As to probability to represent and measure the capacity, namely, maintenance degrees. Water Pump maintenance of five elements: ① "maintenance objects", including pumps, motors, drives and other devices. ② "impose conditions" refers primarily to the maintenance of systems, maintenance of the facilities and sites, the maintenance standard of maintenance personnel and maintenance of tools and instruments, equipment, technical data and other conditions. ③ "the prescribed procedures and methods", is based on the maintenance of technical documents provided the type of work, steps and methods. ④ "specified time" means the provisions of time to repair. ⑤ "provides functions" means the water pump pumping and maintenance to achieve the required flow, head and efficiency of the desired functionality. Maintainability Engineering can be defined as: In order to meet product requirements of maintenance carried out by a series of design, development, production and testing. In fact Maintainability Engineering In addition to the maintenance requirements of the demonstration and determination, also included the supervision of the maintenance of and control, maintenance of design and analysis and maintenance of test and uation and so on, its mission is to improve the product maintainability. 1.2, to carry out water pump need repair studies Maintenance of research in China started late in the gap with the developed countries remains large. At present, China's development does not meet international standards as far as the maintenance system, manufacturing machinery and equipment required to repair cycle is short, stopped a long time and a high proportion of overhaul, repair high cost, resulting in enormous human, material and financial losses. a large water pump repair relationships to large-scale pumping stations drought, drainage, water transfer function can normally play, and relate to the safety of people's lives and property. In particular, Nanshui the north east-line project, the investment volume, affecting a wide range, the average annual cascade pumping unit run time at 5000 ~ 6000h, a long running time, maintenance time is short, heavy maintenance tasks. If a failure of a pump station Pump , the pumping flow rate can not be guaranteed, it will affect other ladder pump station as well as the normal operation of the entire water transfer project. Therefore, the maintenance of a reliable water pump is the first issues to consider. Due to space limitations, the article second, third and fourth sections omitted part of a detailed article please e-mail request to the author. 5, the conclusion Large-scale water pump repair of a direct impact on time to repair, maintenance quality and maintenance costs. The form of large-scale water pump failure are: motor thrust tile burning, pump guide bearing wear, pump cavitation, etc.. Vertical shaft pump unit with a half more good maintainability. should be the maintenance accessibility, can detect and repair system, etc. to enhance and improve the maintenance of pump units.