Mechanical seal device of screw power machine

Abstract

The invention discloses a mechanical seal device of a screw power machine, which is composed of a moving ring (1), a metal corrugated pipe compensation stationary ring (2), a spring-compensated radial inner stationary ring (3), a spring-compensated radial outer stationary ring (4) and a stationary ring seat (5), wherein the moving ring (1) is fixedly installed on a rotor shaft sleeve (8), the metal corrugated pipe compensation stationary ring (2) is arranged on the left side of the moving ring (1), and the spring-compensated radial inner stationary ring (3) and the spring-compensated radial outer stationary ring (4) are arranged on the right side of the moving ring (1). A mechanical seal mechanism with radial double end surfaces and axial double end surfaces is formed. The mechanical seal device has the advantages of being simple in structure, reliable in use, good in stability and convenient in assembly.

Description

technical field [0001] The present invention relates to a mechanical device converted into power by pressurized steam or liquid or a vapor-liquid mixed medium, that is, a vapor-liquid full-flow screw power machine, especially its mechanical seal device. Background technique [0002] The vapor-liquid full-flow screw power machine consists of a casing, a pair of screw rotors that rotate and cooperate with each other, a mechanical seal, a synchronous gear, a low-pressure end seat, and a high-pressure end seat. Synchronous gears, bearings, and mechanical seals are respectively installed in low-pressure end seats and high-pressure end seats, and steam inlet and outlet pipes are respectively opened at both ends of the casing. High-pressure steam enters from the steam inlet, acts on the rotation of the helical rotor, and then discharges from the steam outlet, converting the medium pressure into power output. [0003] The mechanical seal is the key component and the only vulnerable...

AI Technical Summary

Problems solved by technology

[0004] The CN101825181A vapor-liquid full-flow screw power machine mechanical seal device applied by the applicant discloses an improved screw power machine shaft mechanical seal device, which is a Axial double-end face and radial double-end mechanical seal mechanism device, The deficiencies that still exist in this screw power machine shaft mechanical seal device : First, due to the frequent start and stop of the equipment, and due to the large shaft diameter and large torque, it is easy to cause the static ring bellows to be twisted and torn, resulting in the failure of the mechanical seal; The O-ring groove makes the matching surface between the moving ring and the shaft sleeve narrow, and the O-ring groove and the multiple anti-rotation pin hole structures on the other side that are matched with the shaft sleeve will easily increase the stress of the moving ring, cause deformation, and cause leakage. The third is that its radial double-end static ring is formed by processing two end faces on an integral ring, that is, it is an integral radial double-end static ring, and its two friction end faces are non-independent compensation structures. The diameters of the seals are different from the mediums that are blocked separately, so the amount of wear is different, and the two end faces cannot be kept on the same plane for a long time, resulting in increased leakage, which seriously exceeds the standard requirements; four. The gland of the mechanical seal is stuck with the body The spring is fixed, and the circlip and its fixing groove are in clearance fit, resulting in poor fixing stability of the gland and affecting the cooperation between the static ring and the moving ring, resulting in increased leakage, and the gland is difficult to disassemble

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