CLOSED TYPE MECHANICAL SEALING PUMP EFFICIENCY RING AND SHAFT SEAL FLUSHING SYSTEM HAVING PUMP EFFICIENCY RING

摘要

Disclosed is a closed type mechanical sealing pump efficiency ring. The pump efficiency ring is provided with annular left side plate (701) of the pump efficiency ring and right side plate (702) of the pump efficiency ring mutually arranged in parallel; inner rings of the left side plate (701) of the pump efficiency ring and the right side plate (702) of the pump efficiency ring are sheathed on a peripheral surface of a shaft sleeve (12) of a centrifugal pump, peripheries of the left side plate (701) of the pump efficiency ring and the right side plate (702) of the pump efficiency ring are linked to a sealing gland of the centrifugal pump and have gaps, a plurality of blades (703) rotationally arranged in a radiation state is arranged between the left side plate (701) of the pump efficiency ring and the right side plate (702) of the pump efficiency ring, the plurality of blades (703) is in vertical arrangement with the left side plate (701) of the pump efficiency ring and the right side plate (702) of the pump efficiency ring, end openings formed by closing-in ends of the plurality of blades (703) in the radiation state correspond to a liquid outlet of the shaft sleeve (12), and end openings formed by radiating ends of the plurality of blades (703) in the radiation state correspond to a liquid inlet formed on a liquid outlet passage on the sealing gland. Also disclosed is a shaft seal flushing system having the pump efficiency ring. The pump efficiency ring enables the majority of a liquid in a sealing cavity to flow, increases an accelerated distance of the liquid and lengthens a flowing path of the liquid, thereby enlarging the orifice area.