Repairing and scraping device for bearing bush of OG draught fan

Abstract

The invention provides a repairing and scraping device for a bearing bush of an OG draught fan. The repairing and scraping device for the bearing bush of the OG draught fan comprises a tool nose, a connecting piece and a sleeve. The tool nose is triangular and comprises three angular blades. Each angular blade is in the shape of a thin and long crescent. The tool nose is connected with the sleeve in a threaded mode through the connecting piece. Connecting piece external threads are arranged at the end, away from the tool nose, of the connecting piece. Sleeve internal threads are arranged inside the sleeve. The sleeve internal threads are matched with the connecting piece external threads. The invention further provides a machining method of the tool nose and a repairing and scarping method based on the repairing and scraping device. The repairing and scraping device can be obtained by transforming an existing triangular file, is suitable for application and popularization and can replace traditional scrapers. The repairing and scraping device for the bearing bush of the OG draught fan has the advantages that the scraping capacity is high, the bearing bush repairing and scraping time is effectively shortened, labor intensity is relieved, and the bearing bush repairing and scraping precision is high; the vibration quantity of the draught fan is effectively and obviously reduced, and long-term efficient operation of the draught fan is ensured.

Description

technical field [0001] The invention belongs to the field of sliding bearing repairing and scraping devices, and in particular relates to a repairing and scraping device for OG fan bearing bushes and a method for manufacturing and scraping the blade tip thereof. Background technique [0002] Three sets of OG fans imported from France in the steelmaking plant of Meishan Iron and Steel Co., Ltd. are used for the steelmaking furnace of the steel plant. The vibration of the fan will be too large every time the OG fan runs for a cycle, so it is necessary to regularly check and repair the bearing bush. Generally, a single-angle file is used for repairing and scraping. The contact angle between the scraper blade and the bearing bush is small, and the contact point, contact angle, The size of the side clearance corresponds to the scraping one by one. The scraping point is single, there are few contact points, and it takes a long time to repair and scrape a pair of bearing pads, and...

AI Technical Summary

Problems solved by technology

The scraping point is single, there are few contact points, and it takes a long time to repair and scrape a pair of bearing pads, and the measurement gap of the bearing pads is fixed, the flow rate of the lubricating oil is small, and the heat generated by the bearing pads is relatively small, resulting in the bearing pads being easy to generate after each period of operation of the fan. Slight fatigue phenomenon, the vibration of the fan increases, and finally the temperature of the bearing bush rises

Therefore, the bearing pad must be repaired and scraped within one cycle, otherwise it will cause damage to the bearing pad, and in severe cases, the pad will be burned

And each maintenance time is longer

The labor intensity is high, and the maintenance cost is high. Sometimes the precision of repairing and scraping the bearing bush cannot meet the specified requirements, which will affect the normal production of steelmaking.

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