US 12,169,024 B2
Cartridge type mechanical sealing device for sealing liquid
Jingwei Zhao, Nanjing (CN); and Jun Zhang, Nanjing (CN)
Assigned to AIGI Environmental Inc, Nanjing (CN)
Filed by AIGI Environmental Inc., Nanjing (CN)
Filed on Aug. 16, 2022, as Appl. No. 17/888,851.
Claims priority of application No. 202110947063.8 (CN), filed on Aug. 18, 2021.
Prior Publication US 2023/0055493 A1, Feb. 23, 2023
Int. Cl. F16J 15/34 (2006.01)
CPC F16J 15/3464 (2013.01) [F16J 15/348 (2013.01); F16J 15/3488 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A cartridge type mechanical sealing device for sealing liquid, the sealing device being configured to seal a rotating shaft extending through an equipment enclosure so as to seal the liquid inside the equipment enclosure from outside air, and comprising:
a gland (8), a rotating ring adaptor assembly (1), a rotating ring (2), a stationary ring adaptor (5), a stationary ring (4), and a locking ring (13) for mounted around the rotating shaft;
the gland (8) is configured to be fastened to a rear end surface of the equipment enclosure;
the rotating ring adaptor assembly (1) comprises a front end portion configured to be in the liquid and supporting the rotating ring (2) via a first elastic sealing O-ring (47), and a rear end portion extending through the gland (8) such that the rotating ring adaptor assembly (1) is integral with the gland (8), wherein the gland (8) is configured to be away from the liquid and surrounded by the locking ring (13) which is configured to fasten the rotating ring adaptor assembly (1) to the rotating shaft;
the stationary ring adaptor (5) is fastened to a rear end surface of the gland (8) such that the stationary ring adaptor (5) is configured to be integral with the gland (8) and comprises an inner peripheral surface configured to be adjacent to the liquid and supporting the stationary ring (4) via a second elastic sealing O-ring (18);
an end surface of the rotating ring (2) adjoins an end surface of the stationary ring (4) by means of springs (6) so as to form a sealing interface configured to be perpendicular to an axis of the rotating shaft, wherein a convex ring portion (42) of the stationary ring (4) is pressed forward against the rear end surface of the rotating ring (2) with an axial force exerted by the springs (6); and
when the stationary ring adaptor (5) is configured to be releasable from the gland (8), a rotating ring adaptor (1A) of the rotating ring adaptor assembly (1) or the stationary ring adaptor (5) configured to be pulled along the rotating ring in a direction away from the liquid so as to be separated from the gland (8), thereby separating the rotating ring (2) and the stationary ring (4) to release the sealing interface and exposing the rotating ring (2) and the stationary ring (4) to the outside air respectively,
wherein the rear end portion of the rotating ring adaptor assembly (1) is fastened to the rotating shaft and the rear end portion of the stationary ring adaptor (5) is fastened to the gland (8) such that the rotating ring adaptor assembly (1), the stationary ring adaptor (5), and the gland (8) form an integral part of the sealing device.