A mechanical seal flushing device

Abstract

The invention belongs to the mechanical seal field, relates to a mechanical seal flushing device, and overcomes the defects that an existing flushing hole is oversized, so that too large internal pressure of a mechanical seal cannot be distributed unevenly and a sealing ring and the like are prone to fast abrasion. The mechanical seal flushing device comprises a pump end cover, a mechanical seal end cap, a mechanical seal flushing hole, a mechanical seal flushing pipe and a resistance piece, wherein the mechanical seal end cap is arranged on the pump end cover, the mechanical seal flushing hole is formed in the mechanical seal end cap, the mechanical seal flushing pipe is mounted in the mechanical seal flushing hole, and the resistance piece is mounted in the mechanical seal flushing hole and axially provided with a hole channel for liquid circulation. By the mechanical seal flushing device, mechanical seal flushing flow and pressure can be decreased, and leakage due to abrasion and aging of mechanical seal parts can be prevented or decreased; meanwhile, mechanical seal internal pressure can be reduced, so that pressure distribution is enabled to be uniform and service life of the device is prolonged.

Description

technical field [0001] The invention belongs to the field of mechanical seals, and in particular relates to a mechanical seal flushing device. Background technique [0002] Mechanical seal refers to a device that prevents fluid leakage by at least one pair of end faces perpendicular to the axis of rotation, under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, and the cooperation of auxiliary seals to keep fit and slide relative to each other. Mechanical seal leakage is a common phenomenon in pump equipment. There are various reasons for leakage, and it is difficult to analyze the reasons. Replacement or maintenance not only costs a lot of money, affects the work progress, but often fails to achieve the desired effect. [0003] In a typical mechanical seal structure for a pump with an outer flushing pipe, the high-pressure medium flows from the pump outlet, through the outer flushing pipe and the flushing hole on the glan...

AI Technical Summary

Problems solved by technology

In addition, if the flushing hole is too large, the internal pressure of the mechanical seal will be too large, and the distribution will be uneven, which will easily cause the seal ring to wear too quickly. In the case of insufficient assembly precision of the pump, large vibration during pump operation, or aging of the O-ring, it is easy to cause mechanical seal leakage

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