Drum gear coupling for ESP finishing mill

Abstract

The invention discloses a drum gear coupling for an ESP finishing mill. The drum gear coupling comprises a roller-end component, a reducer-end shaft sleeve and a reducer-end transition gear ring, andfurther comprises a spline shaft, a reducer-end external gear shaft sleeve, a protective cover and a reducer-end sealing component, wherein the protective cover is mounted on the spline shaft in a sleeving manner; the left end of the reducer-end external gear shaft sleeve is connected to male splines at the right end of the spline shaft through female splines; the right end of the reducer-end external gear shaft sleeve meshes internal teeth of the reducer-end transition gear ring through external teeth; the protective cover is connected to the reducer-end external gear shaft sleeve; and the reducer-end sealing component is mounted on the reducer-end shaft sleeve through bolts and mounted on the excircle of the reducer-end external gear shaft sleeve in a sleeving manner. Through a novel axial telescopic structure, the problem of a long extension stroke is solved, and meanwhile, the problems that sealing of an original drum gear coupling fails due to frequent sliding, and a gear pair ofthe original drum gear coupling is prone to damage are also solved.

Description

technical field [0001] The invention relates to a drum gear joint shaft of an ESP finishing mill, which can be widely used in the connection between a reducer and a roll or between a gear box and a roll. Background technique [0002] The continuous casting machine in the ESP production line adopts a parallel-plate straight-arc mold, and the billet guide adopts a casting-rolling structure. The billet is pressed down by the liquid core and directly enters the blooming mill to be rolled into a medium-thick plate, and then it can be rolled off the production line after shearing. After being sold, the slabs that are not off the production line are heated by induction, and then enter the five-stand finishing mill to be rolled into thin strips, and then rolled into coils after cooling. The ESP process production line is compactly arranged, and the efficiency from molten steel casting to finished strip production is increased by nearly 50% compared with the original ISP production l...

AI Technical Summary

Problems solved by technology

The disadvantages of this structure are: 1. The axial expansion and contraction of the connecting shaft is realized by the outer gear sleeve 23 at the reducer end and the transition gear sleeve 25 at the reducer end. The matching length is H, and the gap between the tooth end surface of the outer gear sleeve 23 of the reducer and the sealing device 24 is H3. Gear machining is limited by the stroke of the machine tool during the machining process. The total length of the tooth is H+H3, so the axial telescopic stroke of the connecting shaft is H3, and this stroke is too short to fully meet the production needs; 2. Drum-shaped teeth During the rolling process, the connecting shaft performs axial expansion and sliding according to the production requirements. It not only needs to overcome the friction force generated by the weight of the connecting shaft itself, but more importantly, it needs to overcome the friction force generated by the rolling torque, and the cooperation form of the gear pair is deceleration. The outer teeth of the outer gear sleeve 23 at the machine end are arc-shaped teeth, and the inner teeth of the transition ring gear 25 at the reducer end are straight teeth, and the contact form is point-surface contact, so the tooth surface of the sliding pinion wears quickly; 3. Drum-shaped teeth The connecting shaft needs frequent axial expansion and contraction, and the seals in the sealing assembly 24 are all lip seals. The outer gear sleeve 23 at the end of the reducer reciprocates and slides for a long time, and the lip seals are easily damaged and fail, resulting in oil leakage or water ingress, which in turn aggravates the wear of the tooth surface , affecting the service life of the shaft; 4. Figure 8 As shown, when the drum gear shaft extends to the longest position, the right end part of the spring assembly 37 protrudes from the inner hole of the spline shaft 22 and is in a suspended state. Since the shaft rotates during the rolling process, the spring assembly is under the action of centrifugal force. Shaking occurs under the shaft, resulting in poor stability and poor repositioning of the shaft, which affects work efficiency

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