Anticlogging mechanical sealing device

Abstract

The anti-clogging mechanical seal device of the present invention includes a moving ring (1), a static ring (2), a static ring seat (3), and the static ring (2) is a compensation ring, and a The compensation spring (6) is characterized in that a concave platform (31) is provided on the front end surface of the inner hole of the static ring seat (3), and a concave platform (31) is provided on the front surface of the concave platform (31) and the outer ring surface of the static ring (2). The sealing connection is provided with a flexible spacer - a rubber spacer (32) rubber, the rubber spacer (32) and the concave platform (31) form a sealing cavity (30), which blocks the medium in the pump cavity from entering the static ring seat (3) In the inner hole, the static ring (2) slides and fits with the inner ring surface of the gland (9) through the rear end of the connecting sleeve (22), and an O-ring seal (8) is provided on the mating surface to make the static ring (2) The compensation spring (6) at the rear portion of the ring (2) is sealed in the mounting structure cavity (60). It is especially suitable for the seal of the pump shaft of the slurry pump or the pump shaft containing high-concentration solid-containing slurry in the conveying medium, which fully and effectively prevents the mechanical seal from failing due to blockage.

Description

technical field [0001] The invention relates to shaft seals, in particular mechanical seals. Background technique [0002] The mechanical seal device is composed of at least one pair of moving rings and static rings perpendicular to the axis, and the moving ring or static ring is made up of sliding and rotating cooperation under the action of elastic compensating elements (springs). The moving ring is connected to the shaft, and the static ring is The ring is connected with the end cover or the static ring seat, and the sealing effect on the rotating shaft is completed through the relative sliding rotation of the moving ring and the static ring friction pair. [0003] When the mechanical seal device is set as a compensation ring for the static ring, an O-ring is provided between the outer ring of the static ring and the seat of the static ring, and a compensation spring is provided at the rear of the static ring. Since the static ring has axial compensation ability as a com...

AI Technical Summary

Problems solved by technology

Since the static ring has axial compensation ability as a compensating ring, the O-ring sealing ring provided between the outer ring of the static ring and the seat of the static ring will undergo fretting slippage. Since the groove of the O-ring sealing ring is small, that is The matching gap between the O-ring and its groove is small, and the gap in the groove of the O-ring is easily blocked by the medium and impurities in the pump and fouling, resulting in the O-ring being unable to fretting and slipping, resulting in static The ring compensation slips and lags, and the axial displacement compensation cannot be performed, which will destroy the matching seal of the dynamic and static rings

[0004] In addition, the spring as an elastic compensation element should provide elastic compensation force to the sealing end face to ensure a good fit of the sealing end face. Since the spring is a coil spring, the small coil spring has a small intercept and is installed on the gland of the end cover. In the spring seat hole opened above, the compensation spring is also easily blocked by coolant scaling and medium impurities leaking through the sealing end face, which affects the normal movement of the helical compensation spring, affects the floating performance and followability of the seal, that is, affects Spring compensation

Images