Spindle head sealing structure of speed reducer of pumping unit

Abstract

The invention discloses a spindle head sealing structure of a speed reducer of a pumping unit. The spindle head sealing structure comprises a spindle head, a gland, a bearing end cover and a box. A rectangular rubber ring is arranged between the gland and the bearing end cover, an asbestos pad is arranged between the bearing end cover and the box, a transmission sleeve is mounted on the spindle head through a fixing dowel, a fixed ring is arranged inside the bearing end cover, a movable ring is connectedly arranged on the transmission sleeve, a dowel is mounted on the movable ring, O-shaped rubber rings of the fixed ring and the movable ring are arranged on the fixed ring and the movable ring respectively, and a spring is mounted between the movable ring and the transmission sleeve. Through the scheme, the spindle head sealing structure of the speed reducer of the pumping unit is reliable in sealing performance and long in service life.

Description

technical field [0001] The invention relates to a shaft head sealing structure of a reducer of a pumping unit, belonging to the technical field of pumping units. Background technique [0002] In oilfield exploitation, oil pumping unit reducers often have different degrees of oil leakage. The main parts of oil leakage are the joint surface of the upper and lower casings, the shaft head of the input shaft and output shaft, and the bearing end cover. The seal materials are mainly Felt and rectangular rubber play a sealing role by pressing the gland. The disadvantage is that the sealing performance is poor. With the prolongation of use time, the soft packing will be compressed and deformed for a long time, lose its original elasticity, and gradually wear out, so it cannot be automatically compensated. There is no long-term sealing effect. This is the main cause of oil leakage from the shaft head of the reducer; with the development of oil field production, new requirements are ...

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