The utility model discloses a sealing oil system for a turbogenerator set, in which a first oil discharge pipeline is arranged between the sealing oil return expansion groove and the main engine lubricating oil tank, and an expansion groove is arranged on the first oil discharge pipeline to the manual valve of the main engine lubricating oil tank, and a second oil discharge pipeline is arranged at the bottom of the U-shaped pipe of the sealing oil return expansion groove, and a U-shaped pipe is arranged on the second oil discharge pipeline to be moistened by the main engine. The manual valve for oil discharging of the oil tank is connected to the main engine lubricating oil tank after the two oil discharging pipelines converge. The utility model can adopt special operation modes: non-stop turning and lubricating oil system, gas replacement of generator is carried out immediately after the turbine is switched on. After gas replacement is completed, the oil supply pressure of sealing bush is lowered while the pressure of generator is relieved to zero. The sealing oil is returned to the main engine oil tank through the newly installed U-shaped pipeline of the oil return expansion tank and the oil discharge pipeline at the bottom to the main engine oil tank, which can be straight. The sealing oil is discharged to the main engine lubricating oil tank.
【技术实现步骤摘要】
一种汽轮发电机组密封油系统
本技术涉及电厂节约成本领域,涉及密封油系统放油门的优化改造,具体是一种600MW汽轮发电机组密封油系统特殊运行方式下的放油门优化改造。
技术介绍
一般发电机氢气冷却器泄漏需将发电机内压力泄压至零,按照以往的做法,一台机组打闸后,汽轮机缸温降至300℃,投入压缩空气快速冷却装置,加速缸体冷却至150℃,停运快冷,待缸温降至145℃,停运盘车,密封油,发电机泄压至零,通常需要8天时间,减少了发电量。
技术实现思路
本技术的目的是提供一种汽轮发电机组密封油系统,经改造后的系统能够缩短发电机泄压检修停机时间,减少电量损失,系统运行方式多样灵活。为达到该目的,本技术的技术方案是:一种汽轮发电机组密封油系统,包括氢冷发电机、密封油回油扩大槽、主机润滑油箱,浮子油箱、空气抽出槽,其特征在于:在密封油回油扩大槽至主机润滑油箱之间设有第一放油管道,且在第一放油管道上设有扩大槽至主机润滑油箱放油手动门,在密封油回油扩大槽U型管底部设有第二放油管道,且在第二放油管道上设有U型管至主机润滑油箱放油手动门,两路放油管道汇合后共同连接到主机润滑油箱上。在发电机内部有50KPa以上压力时其发电机端部密封瓦回油通过密封油空气抽出槽正常回至主机润滑油箱;但在发电机内部压力低于50KPa以下时特别是发电机内部压力为0KPa时其密封瓦的回油直接进入发电机内部,导致发电机内部进油危险,为保证在这种工况下发电机安全不进油,需要开启密封油回油扩大槽对空放油门放油至大气中,导致环境污染且存在放油不急而导致发电机内部进油。本技术通过对密封油回油扩大槽对空放油手动门改造至具有负压系 ...
【技术保护点】
1.一种汽轮发电机组密封油系统,包括氢冷发电机、密封油回油扩大槽、主机润滑油箱,浮子油箱、空气抽出槽,其特征在于:在密封油回油扩大槽至主机润滑油箱之间设有第一放油管道(3),且在第一放油管道上设有扩大槽至主机润滑油箱放油手动门(1),在密封油回油扩大槽U型管底部设有第二放油管道(4),且在第二放油管道上设有U型管至主机润滑油箱放油手动门(2),两路放油管道汇合后共同连接到主机润滑油箱上。
【技术特征摘要】
1.一种汽轮发电机组密封油系统,包括氢冷发电机、密封油回油扩大槽、主机润滑油箱,浮子油箱、空气抽出槽,其特征在于:在密封油回油扩大槽至主机润滑油箱之间设有第一放油管道(3),且在第一放油管道上设...
【专利技术属性】
技术研发人员:王治辉,李明,高明朗,李会军,王钢锋,宋志强,
申请(专利权)人:华能国际电力开发公司铜川照金电厂,
类型:新型
国别省市:陕西,61
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