Drum-type gear with oil supply and lubrication functions

Abstract

The invention discloses a drum-type gear with oil supply and lubrication functions. The drum-type gear comprises a gear base body, drum-type teeth, micropore grooves, a shaft hole and key groove holes, wherein the drum-type teeth and the gear base body are integrated, the micropore grooves are formed in the tooth faces of the drum-type teeth, the shaft hole is formed in the center position of the gear base body, the key groove hole is formed in the inner wall of the shaft hole, the micropore grooves are evenly formed in the contact area of the front tooth face and the rear tooth face of each tooth of the drum-type teeth, the number of the micropore grooves in each tooth face is 6-12, the micropore grooves are distributed in the tooth surface contact areas in an annular array mode, and each micropore groove is in conical transition from large to small from the outer edge to the center. According to the drum-type gear, lubricating oil on the end face of a gear pair can permeate into a contact interface, circulating flow of a lubricating agent is formed between the contact interfaces, efficient lubrication of the drum-type gear is guaranteed, and the working requirement of continuous casting and rolling metallurgy transmission equipment is met.

Description

technical field [0001] The invention relates to the technical field of lubrication of drum gear couplings in rolling machines, in particular to the drum gear lubrication technology in drum gear couplings. Background technique [0002] Continuous casting and rolling (CSP) of thin plate and strip is a cutting-edge technology in the metallurgical industry. It has the advantages of reliable rolling precision, high efficiency, and low energy consumption. The stability of CSP rolling process puts forward higher performance requirements for its transmission equipment. Since the tooth end face of the drum gear is an involute tooth profile, and the middle position of the gear tooth bulges outwards in the axial direction, when the drum gear meshes with the inner ring gear to transmit power, there may be a gap between the inner ring gear and the drum gear. Small angular displacement and axial displacement, so that the two connecting shafts of the drum gear coupling have a certain self-...

AI Technical Summary

Problems solved by technology

[0003] At present, drum-shaped gears in metallurgical transmission equipment often use thin oil lubrication. Thin oil lubrication is to inject lubricating oil into the end face of the gear pair by means of a hydraulic pump to lubricate the gear meshing surface. Internal gear pairs (such as figure 1 As shown), the contact between the gear pairs is a point contact. Under high torque conditions, the contact area deforms. After deformation, the contact area becomes an elliptical surface contact. The gap between the elliptical contact surfaces is extremely small, and the contact stress between the contact interfaces is relatively large. Therefore, only relying on the flow of lubricating oil itself, only a small part of the external oil supply can enter the gear meshing part, while most of the oil is squeezed to the periphery of the meshing area and stored in the cavity of the gear pair, so the contact area is lubricated. The quality is poor, the temperature of the gear system rises quickly under dry friction conditions and is difficult to dissipate, and the tooth surface of the drum gear is prone to gluing and wear, which affects the lubrication quality and shortens the life of the gear

However, due to the need to frequently replace the oil storage device, it brings great inconvenience to the oiling and maintenance of the coupling

[0005] Patent CN 111692220 A discloses a high-efficiency lubricated gear coupling. This patent focuses on the problem of low lubrication efficiency of the gear pair of the existing coupling. Ring groove, and connect the groove and the meshing area through the oil hole, so that the oil can enter the meshing area smoothly

This scheme improves the meshing efficiency of the drum gear, but since the drum gear needs to be equipped with an oil storage tank, it needs to be regularly replenished with lubricating grease during work, which affects the lubrication quality and work efficiency of the drum gear coupling. oil, there may be serious consequences

[0006] In summary, in the existing oil lubrication scheme of the drum type gear coupling, although the lubricating oil supplied to the end face of the gear pair is relatively sufficient, the oil at the entrance of the meshing area of ​​the gear pair cannot enter the contact interface, which can effectively lubricate the oil. The amount is seriously insufficient, and the tooth surface of the drum gear is prone to gluing wear

However, the existing structure of providing lubricating oil to the meshing area is complex and the cost increases

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