Phosphoric acid axial-flow pump dry gas sealing device

Abstract

The invention discloses a phosphoric acid bearing pump dry gas sealing device, comprising a dual-end sealing friction pair, a spring, a press plate component and a connecting bolt. The invention is characterized in that a gas sealing trough (19) is chiseled on a static ring; the rotation direction of a trough clearance (20) complies with the rotation direction of the pump. The dual-end sealing friction pair consists of a drive ring (3), a movable ring A(9), a fixed ring A(8), a movable ring B(17) and a fixed ring B(18); the fixed ring A(8) is fixed on the drive ring (3); an O-shaped sealing ring (5) is arranged between the fixed ring B(18) and the press plate component (14); the press plate component (14) is connected by a connecting bolt A(12) and a connecting bolt B(15); two ends of a spring (16) are connected with the movable ring A(9) and the movable ring B(17); an air outlet (2) and an air inlet (4) are both arranged on the press plate component (14). The invention has the advantages of long service life, simple troubleshooting, energy saving and consumption reduction, and low operation expense, without water entering the concentration system.

Description

technical field [0001] The invention relates to a sealing device, in particular to a sealing device of a phosphoric acid axial flow pump. Background technique [0002] The shaft seal of phosphoric acid axial flow circulating pump is currently used at home and abroad as mechanical seal and packing seal. The sealing fluid in the double-end mechanical seal has a sealing effect on the medium and can achieve zero leakage of the medium to the atmosphere, but there is a small amount The sealing liquid leaks into the medium and contaminates the medium. There is a small amount of sealing liquid leakage in the mechanical seal on the atmospheric side, which brings certain pollution to the site environment. Requires a sealed liquid circulation cooling system. Large amount of maintenance: the operation of the system is more difficult, the difficulty of on-site maintenance is increased, and there are seal installation errors. Because the seal is a contact seal, there must be friction a...

AI Technical Summary

Problems solved by technology

The existing dry gas seal gas seal groove has a small transition from the outer circumference to the inside, and the deflection angle along the radial direction is large. It is mainly used for high-speed compressors and centrifugal pumps. The applicable medium has low solid content. The disadvantage is that when the speed is low, The gas film is unstable, and the medium is easy to enter the sealing surface. When the solid content of the medium is high, it is easy to fail

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