The utility model discloses a main shaft seal for a tubular turbine, which is composed of a working seal and an overhaul seal. The left end of the working seal contacts the right end of the pressure ring. The pressure ring and the sealing work seal are arranged in the inner cavity between the seal body and the anti-wear sleeve, and the inner wall of the multi-channel sealing ring and an I-ring is sliding and matching. A compression screw is threaded on the annular plate at the left end of the compression ring; the overhaul seal comprises an inflatable enclosure and an intake pipe, in which the inflatable enclosure is annular in shape, and the heart-shaped installation hole is formed by butting the seal body and the seal seat; the inner end of the inflatable enclosure is close to the anti-wear sleeve, and the outer end of the inflatable enclosure is opposite to the radial intake hole inside the seal body. The outer end of the radial inlet is connected with an air inlet pipe. The working seal of the utility model is composed of a plurality of sealing rings and an I-ring, which has good wear resistance, is not easy to damage the anti-wear sleeve, and has good sealing performance; the overhaul seal adopts a ring-shaped inflatable enclosure belt with a solid cross-section and low manufacturing cost.
【技术实现步骤摘要】
贯流式水轮机用主轴密封
本技术属于水轮机领域,涉及一种贯流式水轮机用主轴密封。
技术介绍
贯流式水轮机的主轴密封一般为工作密封+检修密封式的组合密封,目前的工作密封采用柔性密封环,而检修密封需要专用的模具制造。现有结构的缺陷是:柔性密封环的耐磨性差,易损伤抗磨套,且密封性差;同时,检修密封需要专用的模具制造又大量增加了制造成本。
技术实现思路
本技术所要解决的技术问题在于提供一种密封性能好、成本低廉的贯流式水轮机用主轴密封。本技术的技术方案如下:一种贯流式水轮机用主轴密封,该主轴密封为组合密封,并由工作密封(A)和检修密封(B)组成,其特征在于:所述密封环(3)沿密封体(1)的轴向并排设置,且工字环(4)设在密封环(3)之间;所述工作密封(A)左端与压环(5)右端接触,该压环与密封工作密封(A)设在密封体(1)和抗磨套(2)之间的内腔中,并由多道密封环(3)和一道工字环(4)组成体(1)的内壁滑动配合,而压环(5)左端的环形板上穿设有一根压紧螺杆(6),该压紧螺杆的尾部与密封体(1)固定,压紧螺杆(6)的头部套装有压紧弹簧(7)后连接有压紧螺母(8);所述检修密封(B)包括充气围带(9)和进气管(11),其中充气围带(9)为环形结构,其横截面为实心的心型结构,该充气围带(9)装在心形安装孔中,该心形安装孔由密封体(1)和密封座(10)对接而成;所述充气围带(9)的内端靠近抗磨套(2),该充气围带外端正对密封体(1)上的径向进气孔(1a)内端,径向进气孔(1a)的外端接有所述进气管(11)。本案的工作密封(A)由多道密封环(3)和一道工字环(4)组成,耐磨性好,不易 ...
【技术保护点】
1.一种贯流式水轮机用主轴密封,该主轴密封为组合密封,并由工作密封(A)和检修密封(B)组成,其特征在于:所述工作密封(A)设在密封体(1)和抗磨套(2)之间的内腔中,并由多道密封环(3)和一道工字环(4)组成,其中密封环(3)沿密封体(1)的轴向并排设置,且工字环(4)设在密封环(3)之间;所述工作密封(A)左端与压环(5)右端接触,该压环与密封体(1)的内壁滑动配合,而压环(5)左端的环形板上穿设有一根压紧螺杆(6),该压紧螺杆的尾部与密封体(1)固定,压紧螺杆(6)的头部套装有压紧弹簧(7)后连接有压紧螺母(8);所述检修密封(B)包括充气围带(9)和进气管(11),其中充气围带(9)为环形结构,其横截面为实心的心型结构,该充气围带(9)装在心形安装孔中,该心形安装孔由密封体(1)和密封座(10)对接而成;所述充气围带(9)的内端靠近抗磨套(2),该充气围带外端正对密封体(1)上的径向进气孔(1a)内端,径向进气孔(1a)的外端接有所述进气管(11)。
【技术特征摘要】
1.一种贯流式水轮机用主轴密封,该主轴密封为组合密封,并由工作密封(A)和检修密封(B)组成,其特征在于:所述工作密封(A)设在密封体(1)和抗磨套(2)之间的内腔中,并由多道密封环(3)和一道工字环(4)组成,其中密封环(3)沿密封体(1)的轴向并排设置,且工字环(4)设在密封环(3)之间;所述工作密封(A)左端与压环(5)右端接触,该压环与密封体(1)的内壁滑动配合,而压环(5)左端的环形板上穿设有一根压紧螺杆(6),该压紧螺杆的尾部与密封体(1)固定,压紧螺杆(6)的头部套装有压紧弹簧(7)后连接有压紧螺母(8)...
【专利技术属性】
技术研发人员:尹晓玲,谢海,
申请(专利权)人:重庆云河发电设备有限公司,
类型:新型
国别省市:重庆,50
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