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    • 10. 发明授权
    • Centrifugal pump formed by pressing and welding and its manufacturing process
    • 离心泵通过压制和焊接形成,其制造工艺
    • US06409474B1
    • 2002-06-25
    • US09582689
    • 2000-08-25
    • Fang Liang
    • Fang Liang
    • F04D2954
    • F04D29/4266
    • The invention relates to a centrifugal pump and it's manufacturing process, more particularly to a pump formed by pressing and welding metal sheet. In this invention, comprising a pump casing, an impeller, labyrinth ring supports, labyrinth rings, a real cover and a chassis, characterized in that the manufacturing process of said pump casing includes following steps: using a female mold made by wear-resisting metal, the female space in said female mold is a near 360° integrated spiral with radial expanded gradually shape and approximately semicircle cross section, using a male mold made by pressing deformable soft or elastic material, putting a tubular member with flange made by metal sheet between said molds, closing said molds, expanding said male mold made by soft or elastic material. Said tubular member will be expanded into a near 360° integrated spiral casing with radial expanded gradually shape and approximately semicircle cross section.
    • 本发明涉及一种离心泵及其制造方法,更具体地涉及通过压制和焊接金属板形成的泵。 在本发明中,包括泵壳体,叶轮,迷宫环支撑件,迷宫环,真实盖和底盘,其特征在于,所述泵壳的制造过程包括以下步骤:使用由耐磨金属制成的阴模 所述阴模中的雌性空间是近360°的一体化螺旋,径向膨胀逐渐形状和大致半圆形截面,使用通过压制可变形的软或弹性材料制成的阳模,将由金属片制成的凸缘的管状构件放在 所述模具关闭所述模具,使由柔软或弹性材料制成的所述阳模膨胀。 所述管状构件将被扩展成近似360°的集成螺旋壳体,其具有径向膨胀的逐渐形状和大致半圆形横截面。