Grinding materials CK450 rocker bearing base foundation bolt fracture treatment

Grinding materials CK450 rocker bearing base 2019 - bolt fracture treatment method 12 - 03 Deng Shirong ( Ganzhou evergreen) Yudu company raw material vertical mill for anhui conch kawasaki energy-saving equipment manufacturing co. , LTD. , production CK450 grinding, rocker bearing foundation with concrete structure, four connecting beam connected with the rocker bearing base, formed the whole mill housing support, reinforced concrete structure foundation than other steel structure foundation vertical mill vibration is better. Under normal operating conditions, the rocker arm bearing amplitude value is in commonly 130 & mu; M or so, the main reducer vibration value in 1 floor. Fluctuations around 0 mm/s, the main reducer high speed shaft vibration value in 2. 0 mm/s about volatility. After entering in October 2018, the vertical mill 1 #, 4 # rocker bearing seat base have a foundation bolt along the floor surface often cracks bearing base, the main reason is that the rocker bearing base anchor bolt M48 & times; In 2100 monolithic reinforced concrete foundation, the vertical mill run more than four years time, bolt oxidation corrosion aging cause shear failure along the floor surface, using the peak park grinding opportunity to new bolt welding section, running again after a period of time in the original fracture is down a few centimeters, so processing times repeatedly, to mouth open mill, vertical mill vibration. He decided to stay kiln overhaul thoroughly again and again in February 2019. Before the overhaul, yudu company have held overhaul scheme discussion, and invited corporations jin-zong li deputy general and engineering company related with management and technical personnel to the scene guidance and develop practical and feasible maintenance plan, overhaul treatment effect is good, completely solve the vertical mill rocker bearing base anchor bolt fracture frequently major equipment vibration caused by big hidden trouble. Radial bearing base foundation bolt fracture treatment methods are as follows: 1, the 1 #, 2 # rocker bearing base secondary grouting layer off and clean, the 1 #, 2 # rocker bearing base two anchor bolt hole (original Center distance is 2260 mm) Toward the center were 585 mm again based on the steel base and reinforced concrete with professional rig drilling 30 68 hole ( As shown in figure shown in attachment 1) ； 2, reprocessed four M56 & times; 2250 ( On both ends of the wire length, 200) Anchor bolt and the heat treatment, the new open four anchor bolt holes through the fixed radial base, to replace the original M48 & times; 2100 anchor bolt; After 3, anchor bolt installation fixed to the base with high strength grouting material about 2 tons of watering and maintenance. The entire process construction, a total of 5 days time to complete, mainly is the rocker arm bearing base in reinforced concrete foundation reinforced thick and thick and base plate thickness, drilling is difficult and by the construction unit please professional outsourcing stiletto about 4 days to play 4 30 68 & times; 1600 holes. Installed the new processing of four M56 & times; 2250 anchor bolt fixed base ( As shown in figure shown in attachment 2) , from now on February 24, 2019 overhaul of the kiln end mill run to open at the end of may have more than three months of vertical mill run, the rocker arm bearing base anchor bolt is very successful.