Two-way floating type mouth-ring sealing device of centrifugal pump
A sealing device, floating technology, applied to parts, pumps, pump elements, etc. of pumping devices used for elastic fluids, to achieve the effects of improving efficiency, reducing leakage losses, and quickly installing and dismantling
Active Publication Date: 2013-09-18
JIANGSU UNIV
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All parts choose stainless steel 304 as the original base material
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[0023] A double-channel floating mouth ring sealing device for a centrifugal pump includes a fixed neck ring, a floating wear ring, a floating pressure ring, a fixed pressure ring, a spring and an inner hexagon bolt. Stainless steel 304 is selected as the original base material for all parts. First, determine the geometric size of the fixed neck ring, which is determined by the size of the ring groove of the pump body. In order to reduce the leakage loss of the inner wall of the impeller inlet, the sealing surface of the fixed neck ring adopts a sawtooth shape to form the first sealing structure with the inner wall of the impeller. ; Then, according to the size of the fixed neck ring, determine the size of the floating wear ring. The sealing surface of the floating wear ring adopts a sawtooth shape. Install the designed floating wear ring in the fixed neck ring to form a second line with the outer wall of the impeller. Seal, and then place the floating pressure ring on the floa...
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The invention discloses a two-way floating type mouth-ring sealing device of a centrifugal pump. A floating wearing ring precompresses through a floating compression ring and springs, and then is fixed on a fixed neck ring by a hexagonal nut, a fixed compression ring and inside hexagonal bolts to form the two-way floating type mouth-ring sealing device. The fixed neck ring and the floating wearing ring are in sawtoothed sealing structures, so that leakage losses can be further reduced; a larger gap is formed between the fixed neck ring and an internal wall of an impeller, and a smaller gap is formed between the floating wearing ring and an external wall of the impeller, so that a shape position deviation caused by an assembling error can be compensated by a self-centering function of the floating wearing ring; the leakage losses at a mouth ring can be reduced effectively; the excessive abrasion arising from a smaller gap and a noise generated by friction can be eliminated effectively; the efficiency of the centrifugal pump is improved greatly; the abrasion between the mouth ring and the impeller is avoided; and a two-way sealing ring structure can effectively balance the stress of the internal wall and the external wall of the impeller, so that the stress of the impeller can become more uniform, and more stable operation can be achieved.
Description
Technical field [0001] The invention belongs to the technical field of centrifugal pump manufacturing, and particularly relates to a centrifugal pump double-channel floating mouth ring sealing device. Background technique [0002] At present, most of the methods used for centrifugal pump impeller and mouth ring seal are single-channel fixed mouth ring sealing structure, and the radial clearance fit between the impeller and the mouth ring is processed into a 0.3-0.5mm radial clearance fit. This method can achieve A certain sealing effect, but because the single-pass orifice ring has a fixed structure, the shape and position deviation caused by processing and assembly tends to be close to or even exceed the reserved radial clearance, resulting in friction between the impeller and the orifice ring. Due to the wear of the impeller and the mouth ring, at the same time, it is also prone to jamming of the impeller. In addition, the single-channel seal has only one seal between the impe...
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IPC IPC(8): F04D29/12
Inventor 刘厚林任芸杨洪镔王勇
Owner JIANGSU UNIV