Views: 0 Author: Site Editor Publish Time: 2022-09-27 Origin: Site
1. The failure forms of chain wheel and link include: strong fracture and fatigue fracture; It is usually due to excessive plastic deformation after being stressed, and it can not engage normally. By improving the strength and service life of chain wheels and links, the probability of conveyor stopping is reduced.
2. Sprocket shaft group is the transmission part of chain operation, which is mainly composed of shaft, bearing, bearing seat, sprocket, seal, through cover, shaft sleeve, etc. The chain wheel is forged from alloy steel to enhance its strength and prolong its service life. Quenching, tempering and surface hardening treatment are adopted. After use, if one side of the tooth surface is worn about 1mm, its installation direction should be changed, and its stressed tooth surface should be changed to extend its service life. The reason for the high temperature of the sprocket shaft group is that the lubricating oil is insufficient, the oil has impurities or the bearing is damaged.
3. The chain shifter extends the crescent shaped fork to the middle of the sprocket groove to ensure that the sprocket groove is not blocked by coal, and at the same time, the circular chain exits the sprocket at the normal separation point, and the sundries clamped in the sprocket groove are removed in time to ensure the normal engagement of the sprocket and scraper chain. The upper and lower sides of crescent fork are provided with high manganese steel surfacing layer to improve the surface hardness and wear resistance. After wear, it can be repaired by surfacing and reused. The chain splitter is damaged and the chain is too loose. The chain at the sprocket is easy to bite the tip of the chain splitter to make it bend and twist, causing damage to the chain splitter. Therefore, the chain must be tightened in time.
4. The failure of the half drum is the loosening of the fixing bolts, so the daily inspection and maintenance should be strengthened.
Recently, the Jining High-tech Zone General Trade Union and the Human Resources Department of Jining High-tech Zone jointly announced the 2024 'High-tech Craftsman' list. Li Zhenbo, General Manager of Information Technology at China Coal Group and General Manager of Zhongyun Group, was awarded the title of 'High-tech Craftsman' for his outstanding contributions and innovative spirit.
On September 30th, China Coal Group held a grand cultural performance to celebrate the 75th anniversary of the founding of the People's Republic of China with the theme of 'Forging Ahead to Celebrate the Birthday of the People's Republic of China' in the conference center. The chairman of China Coal Group, Mr. Qiu Qing, the general manager of China Coal Group, Mr. Han Yong, and all the members of the leadership team of China Coal Group attended the event and witnessed the grand celebration together with more than 1,000 employees on the spot. The cultural performance was conducted in the way of 'on-site + webcast', aiming to show the spirit of the cadres and workers of China Coal Group and express the love and blessing to the great motherland through colorful cultural programs.
On September 29th, in this season of autumn and fruitfulness, China Coal Group, full of joy and pride, participated in the ‘Harvest Celebration and National Day’, which was jointly organized by Jining Hi-Tech District Federation of Trade Unions and Jiezhuang Street to welcome the 75th anniversary of the founding of New China and the Farmer's Harvest Festival.
