The utility model discloses a double-flow ring sealing pad for hydrogen-cooled generators, which can restrain the flow of sealing oil. A sealing pad and an installation support are installed on the main shaft of the generators. An empty side sealing oil inlet and a hydrogen side sealing oil inlet are arranged outside the sealing pad from left to right, and an empty side sealing joint surface, an empty side ring oil distribution groove, a hydrogen space sealing joint surface are arranged inside the sealing pad from left to right. The hydrogen side annular distribution tank and the hydrogen side sealing joint surface; the empty side sealing joint surface, the hydrogen space sealing joint surface and the hydrogen side sealing joint surface are parallel to the outer cylinder surface of the generator spindle. At least one annular flow blocking groove with its coaxial axis is arranged on the hydrogen space sealing joint surface, and several sealing oil storage blocking bubbles are distributed on both the empty side sealing joint surface and the hydrogen side sealing joint surface. The annular choke groove and oil storage choke bubbles on the inner surface of the seal bush can effectively improve its ability to seal hydrogen. When the seal Bush and the generator spindle wear each other and the sealing clearance increases, the sealing performance of the seal Bush will not decrease.
【技术实现步骤摘要】
一种抑制密封油窜流流量的氢冷发电机双流环密封瓦
本技术具体涉及一种抑制密封油窜流流量的氢冷发电机双流环密封瓦。
技术介绍
氢冷发电机指利用氢气冷却发电机的机器,发电机内的氢气在发电机的两端风扇的驱动下,以闭式循环方式在发电机内部作强制循环流动,使发电机的铁芯和转子绕组得到冷却。其间,氢气流经位于发电机四角处的四个氢气冷却器,经氢气冷却器冷却后的氢气又重新进入铁芯和转子绕组作反复循环。氢气冷却器的冷却水来自闭式循环冷却水系统。常温下的氢气不怎么活跃,但当氢气与氧气或空气混合后,如果被点燃则会发生爆炸,后果不堪设想。因此,要求发电机内的氢气纯度不低于96%,氧气含量不超过2%,而且在置换气体时,使用惰性气体进行过渡,或采用真空置换,以避免氢气和氧气直接触、混合,防止发生爆炸。氢冷发电机组经长期运行后,发电机密封瓦的密封面和发电机主轴的轴径处都会磨损,从而使密封间隙增大,密封瓦密封性能降低,导致发电机内部氢气泄漏,危及机组安全运行,而且发电机补氢量增大,经济性变差;更为严重的是,发电机密封瓦及发动机主轴磨损后难以修复,造成密封瓦甚至发动机转子报废。
技术实现思路
本技术的目的在于克服现有技术的缺点,提供一种抑制密封油窜流流量的氢冷发电机双流环密封瓦,以解决氢冷发电机组经长期运行后,发电机密封瓦的密封面和发电机主轴的轴径处都会磨损,从而使密封间隙增大,密封瓦密封性能降低,导致发电机内部氢气泄漏的问题。为实现上述目的,本技术所采取的技术方案是:提供一种抑制密封油窜流流量的氢冷发电机双流环密封瓦,发电机主轴上安装有密封瓦和安装支座,密封瓦位于安装支座内,密封瓦与发电机主轴之间 ...
【技术保护点】
1.一种抑制密封油窜流流量的氢冷发电机双流环密封瓦,发电机主轴(1)上安装有密封瓦(4)和安装支座(6),密封瓦(4)位于安装支座(6)内,密封瓦(4)与发电机主轴(1)之间有密封间隙;所述安装支座(6)左端外侧为发电机外空气侧(7),安装支座(6)右端外侧为发电机内氢气侧(3),密封瓦(4)外面由左至右排布有空侧密封油入口(5)和氢侧密封油入口(2),密封瓦(4)内面由左至右排布有空侧密封结合面(8)、空侧环状配油槽(9)、氢空间隔密封结合面(10)、氢侧环状配油槽(11)和氢侧密封结合面(12),空侧密封油入口(5)与空侧环状配油槽(9)连通,氢侧密封油入口(2)与氢侧环状配油槽(11)连通,其特征在于:所述密封瓦(4)内面的空侧密封结合面(8)、氢空间隔密封结合面(10)和氢侧密封结合面(12)均与发电机主轴(1)的外圆柱面平行,氢空间隔密封结合面(10)上设有至少一条与其同轴的环形阻流槽(13),空侧密封结合面(8)和氢侧密封结合面(12)上均布有若干密封储油阻流泡(14),密封储油阻流泡(14)为内凹的凹坑。
【技术特征摘要】
1.一种抑制密封油窜流流量的氢冷发电机双流环密封瓦,发电机主轴(1)上安装有密封瓦(4)和安装支座(6),密封瓦(4)位于安装支座(6)内,密封瓦(4)与发电机主轴(1)之间有密封间隙;所述安装支座(6)左端外侧为发电机外空气侧(7),安装支座(6)右端外侧为发电机内氢气侧(3),密封瓦(4)外面由左至右排布有空侧密封油入口(5)和氢侧密封油入口(2),密封瓦(4)内面由左至右排布有空侧密封结合面(8)、空侧环状配油槽(9)、氢空间隔密封结合面(10)、氢侧环状配油槽(11)和氢侧密封结合面(12),空侧密封油入口(5)与空侧环状配油槽(9)连通,氢侧密封油入口(2)与氢侧环状配油槽(11)连通,其特征在于:所述密封瓦(4)内面的空侧密封结合面(8)、氢空间隔密封结合面(10)和氢侧密封结合面(12)均与发电机主轴(1)的外圆柱面平行,氢空间隔密封结合面(10)上设有至少一条与其同轴的环形阻流槽(13),空侧密封结合面(8)和氢侧密封结合面(12)上均布有若干密封储油阻流泡(14),密封储油阻流泡(14)为内凹的凹坑。2.根据权利要求1所述的抑制密封油窜流流量的氢冷发电机双流环密封瓦,其特征在于:所述密封瓦(4)内面浇铸有抗磨损、抗黏合、抗腐蚀、抗疲劳和...
【专利技术属性】
技术研发人员:王成木,岳婷,赵其春,费宇,刘雪垠,冯岚,张蒙,
申请(专利权)人:四川省机械研究设计院,
类型:新型
国别省市:四川,51
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