Magnetofluid sealing device with bearing cap

Abstract

The invention relates to the technical field of sealing for mechanical engineering, in particular to a magnetofluid sealing device with a bearing cap. The magnetofluid sealing device comprises a shell, bearings, a pole shoe ring, the bearing cap and permanent magnets. The shell sleeves the left end of a shaft, the bearings are arranged in the shell, and the bearing cap comprises a ring-shaped plate and a threaded ring. The outer diameter of the ring-shaped plate is larger than the outer diameter of the threaded ring and the inner diameter of the shell. The threaded ring and the left end of the ring-shaped plate are connected integrally. The outer diameter of the threaded ring is as same as the inner diameter of the shell. The shell sleeves the threaded ring from the right end of the shell. An inner thread is arranged on the inner surface of the threaded ring. An outer thread is arranged on the outer surface of the pole shoe ring. The outer thread of the pole shoe ring is matched with the inner thread of the threaded ring. The pole shoe ring is screwed into the threaded ring. A gap is reserved between the inner surface of the pole shoe ring and the shaft. A clamp seat is arranged at a position, clear to the shaft, of each of the left end face and the right end face of the pole shoe ring. The permanent magnets are mounted in the two clamp seats respectively. The sealing device has simple structure and reliable sealing performance.

Description

technical field [0001] The invention relates to the technical field of mechanical engineering sealing, in particular to a magnetic fluid sealing device for a bearing cover. Background technique [0002] Magnetic fluid seals are widely used in various industries due to their non-rigid friction and good sealing effect. Although the common magnetic fluid sealing device has the function of zero leakage, its pressure resistance performance decreases significantly with the increase of the sealing gap. Therefore, it is of great significance to provide a sealing device with simple structure, convenient installation and high pressure resistance performance. The existing common ferrofluid sealing device has low sealing performance under the condition of large gap, and the space occupied by the sealing component in the middle part is relatively large, so it is difficult to install; in addition, the bearing cover is usually sealed with a felt ring, but when the shaft rotates, the shaft ...

AI Technical Summary

Problems solved by technology

The existing common magnetic fluid sealing device has poor sealing performance under the condition of large gap, and the space occupied by the sealing component in the middle part is relatively large, so it is difficult to install; in addition, the bearing cover is usually sealed with a felt ring, but when the shaft rotates, the shaft and Friction and wear between the felt rings lead to seal failure and leakage of the sealed medium

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