The utility model relates to the technical field of fluid machinery, in particular to an impeller sealing mechanism and a centrifugal pump; the impeller sealing mechanism includes an impeller, a pump cover, a dynamic sealing component and a static sealing component; the impeller is provided with a sealing extension pipe; the dynamic sealing component includes a dynamic ring, a corrugated pipe and an elastic part, the corrugated pipe is sleeved on the outside of the sealing extension pipe, and the elastic part is sleeved on the outside of the corrugated pipe On the outside, the two ends of the elastic part and the flanging part of the two ends of the bellows are against each other, and the moving ring is located at the end of the bellows towards the pump cover; the inner surface of the pump cover is provided with a step part, and the static sealing component is fixed in the step part; when the pump cover and the centrifugal pump body are installed, the dynamic sealing component can be sealed against the static sealing component, so as to achieve the sealing between the impeller and the pump cover, The liquid at the outlet of centrifugal pump will not be sucked back or pressed back from the gap between the front cover plate and the pump cover to the inlet of centrifugal pump, so as to effectively improve the working efficiency and performance of centrifugal pump.
【技术实现步骤摘要】
叶轮密封机构及离心泵
本技术涉及流体机械技术
,尤其是涉及一种叶轮密封机构及离心泵。
技术介绍
当前离心泵被广泛应用于各个领域,现有技术中大部分离心泵的结构如图1所示,叶轮1’固定在电机轴端,电机主轴转子与外壳通过轴承转动连接,电机运转时主轴会发生轴向和径向的窜动,为了防止叶轮与泵体发生摩擦而产生不必要的损害,叶轮1’与泵盖2’之间不管是轴向还是径向都留有较大的空间,而有缝隙就会有泄露,离心泵出口与入口的压差越大,泄露量也就越多,排出口处的大量液体被回吸或回压到离心泵的吸入口,导致离心泵的排量减少,离心泵排出口端的压力也自然随之降低,从而极大的降低了离心泵的工作效率;尤其是当离心泵用于抽取真空设备内的液体时,此种情况更为明显。现有技术中也有部分离心泵在叶轮与泵壳前盖板之间设置一个密封圈进行密封,但是在离心泵使用过程中由于叶轮磨损或窜动导致叶轮与泵壳前盖板之间的间隙不断变大,密封圈只能减小间隙,而不能完全对该处缝隙进行密封,仍然存在泄露的问题,影响离心泵的工作效率。
技术实现思路
本技术的目的在于提供一种叶轮密封机构及离心泵,以在一定程度上解决现有技术中离心泵的叶轮与泵盖前盖板无法有效密封的技术问题。本技术提供了一种叶轮密封机构,包括叶轮、泵盖、动密封组件和静密封组件;所述叶轮的前盖板上设置有密封延伸管,所述密封延伸管的轴线与所述叶轮主轴共线;所述动密封组件包括动环、波纹管和弹性件;所述波纹管套设于所述密封延伸管外侧,所述弹性件套设于所述波纹管外侧,且所述弹性件的两端与所述波纹管两端的翻边部相抵靠;所述动环位于所述波纹管朝向所述泵盖的一端端面上;所述泵盖内表面 ...
【技术保护点】
1.一种叶轮密封机构,其特征在于,包括叶轮、泵盖、动密封组件和静密封组件;所述叶轮的前盖板上设置有密封延伸管,所述密封延伸管的轴线与所述叶轮的主轴共线;所述动密封组件包括动环、波纹管和弹性件;所述波纹管套设于所述密封延伸管外侧,所述弹性件套设于所述波纹管外侧,且所述弹性件的两端与所述波纹管两端的翻边部相抵靠;所述动环位于所述波纹管朝向所述泵盖的一端端面上;所述泵盖的内表面设置有阶梯部;所述静密封组件位于所述阶梯部上;所述动环能够与所述静密封组件密封抵靠。
【技术特征摘要】
1.一种叶轮密封机构,其特征在于,包括叶轮、泵盖、动密封组件和静密封组件;所述叶轮的前盖板上设置有密封延伸管,所述密封延伸管的轴线与所述叶轮的主轴共线;所述动密封组件包括动环、波纹管和弹性件;所述波纹管套设于所述密封延伸管外侧,所述弹性件套设于所述波纹管外侧,且所述弹性件的两端与所述波纹管两端的翻边部相抵靠;所述动环位于所述波纹管朝向所述泵盖的一端端面上;所述泵盖的内表面设置有阶梯部;所述静密封组件位于所述阶梯部上;所述动环能够与所述静密封组件密封抵靠。2.根据权利要求1所述的叶轮密封机构,其特征在于,所述静密封组件包括静环和静环密封垫,所述静环密封垫套设与所述静环外侧,所述静环能够与所述动环密封抵靠。3.根据权利要求2所述的叶轮密封机构,其特征在于,所述阶梯部上开设有限位凹槽,部分所述静环密封垫嵌设于所述限位凹槽内。4.根据权利要求1所述的叶轮密封机构,其特征在于,所述动密封组件还包括前紧固环和后紧固环;所述前紧固环套设于所述波纹管靠近所述静密封组件的一端的...
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