Abstract: A spiral fluted wheel has a top plate, a bottom plate and multiple spiral impellers. The spiral impellers are sandwiched between the top plate and the bottom plate to combine the top plate and the bottom plate together. Each spiral impeller has two wedges to complementary engage with another wedge of an adjacent spiral impeller. At least one male engaging element is formed on one wedge of each spiral impeller, and a female engaging portion is defined in the other wedge to engage with each respective male engaging element on the adjacent spiral impeller. Accordingly, the spiral fluted wheel can be combined rapidly and precisely.

Abstract: A support assembly has two support devices. Each support device has a base, a bearing seat with a thrust bearing and a thrust journal. The two support devices can support the shaft together. The force applied to the structure of each support device is reduced, and the friction between each thrust journal and the corresponding thrust bearing is also reduced. The useful life of the support assembly is prolonged.

Abstract: A spiral fluted wheel for a water pump is composed of a first plate (10), a second plate (20) corresponding to the first plate (10), and a plurality of spiral impellers (30) sandwiched between the first plate (10) and the second plate (20). Each spiral impeller (30) has planned complementary flanges so as to combine with adjacent spiral impellers (30) easily and precisely.

Abstract: A spiral fluted wheel for a water pump is composed of a first plate (10), a second plate (20) corresponding to the first plate (10), and a plurality of spiral impellers (30) sandwiched between the first plate (10) and the second plate (20). Each spiral impeller (30) has planned complementary flanges so as to combine with adjacent spiral impellers (30) easily and precisely.

Abstract: A stage for a centrifugal submersible pump has a base, a connecting plate and an impeller. The base has multiple ribs integrally formed in the base. The connecting plate is securely attached to one end of the base. The connecting plate has an annular core and a resilient coating. The coating is coated around the core. A central hole is defined through the resilient coating. The impeller is supported on the connecting plate. Accordingly, the structure of the base is simplified. The cost for manufacturing the stage is reduced. In addition, because the impeller does not abut the base but is supported on the connecting plate with the resilient coating, the wear between the base and the impeller can be avoided. The useful life of the stage is prolonged.