Sliding bearing sealing structure of spiral main shaft of horizontal screw centrifugal machine

Abstract

The invention relates to a sliding bearing sealing structure of a spiral main shaft of a horizontal screw centrifugal machine. A bearing sleeve, a sealing ring, a large end support and a hollow shaftare included. The sliding bearing sealing structure of the spiral main shaft of the horizontal screw centrifugal machine is characterized in that with the center line of the total length of the bearing sleeve as reference, a left-handed rotation spiral groove and a right-handed rotation spiral groove are oppositely formed in the hole wall of an inner hole of the bearing sleeve; the rotation direction of the left-handed rotation spiral groove close to the sealing ring is the same as the rotating direction of the hollow shaft; the rotation direction of the right-handed rotation spiral groove away from the sealing ring is opposite from the rotating direction of the hollow shaft; and the bearing sleeve is provided with a plurality of oil injecting holes communicated with the left-handed rotation spiral groove and the right-handed rotation spiral groove. The sliding bearing sealing structure of the spiral main shaft of the horizontal screw centrifugal machine has the beneficial effects thatcompared with the prior art, the left-handed rotation spiral groove, the right-handed rotation spiral groove and a labyrinth seal form the overall lubricating grease sealing structure, lubricating grease in the bearing sleeve is effectively sealed and stored, the function of storing the lubricating grease for relatively long time is achieved, the function time of the lubricating grease is prolonged, the lubricating grease adding frequency is reduced, the shutdown overhauling time is saved, and the production efficiency of the machine is greatly improved.

Description

technical field [0001] The invention belongs to the field of centrifuge equipment, and in particular relates to a sliding bearing sealing structure for a screw main shaft of a decanter centrifuge. Background technique [0002] The horizontal screw centrifuge is installed on the base of the big end support of the drum and the sealing structure of the internal sliding bearing of the small end support, see the attached image 3 , Bearing sleeve 01, sealing ring 02, big end support 03 and hollow shaft 04, sealing ring and bearing sleeve are installed inside the big end support, the hollow shaft is supported on the bearing sleeve, and the hollow shaft performs relative rotational movement relative to the big end support. Grease is injected into the gap between the bearing sleeve and the hollow shaft through the big end support and the oil circuit system on the bearing sleeve, and the sealing ring seals the grease in the gap between the bearing sleeve and the hollow shaft to preven...

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