Hammer crusher feed roller shaft fracture online processing measures

Hammer crusher feed roller shaft fracture of 2019 - online processing measures 02 - 27 Zhao Xiaozeng ( Dalian tianrui cement co. , LTD. ) My company limestone mine broken system has two PCF2022 hammer crusher, crushing machine design output capacity of 800 t/h, allowing maximum feed size ( 1000× 1000× 1500). Mm, discharging particle size less than 75 mm. Crusher has driving and driven two feeding roller, feed roller is equipped with drive reducer for planetary reducer, by locking plate of hollow spindle and speed reducer shaft connection, speed of 18. 25 r/min, put into operation in May 2007. 1 problem on June 9, 2014, active feed crusher roller spindle shaft head appear fatigue cracks ( See figure 1) 。 If 2 solutions to replace the feed roller of conventional processing methods, not only change the time is long, but live not for roller, and production is not allowed to crusher downtime is too long. Finally, we according to the feeding roller drive assembly form and main shaft fracture, combined with years of experience in production management practice, field measurement is calculated, designing a set of simple connection, only 16 h, just returned to the operation of the crusher. The connection device is mainly composed of shaft head and lock sets of two parts (Z See figure 2) 。 Shaft head part, is mainly used to replace the main shaft break with 45 # steel conditioning, in the large diameter on the wall of the spindle head cloth three 80 ~ 100 mm long groove, in order to increase its hold power. Z type locking set of selection is the sold Z2 lock set, used to lock shaft head size. Due to space limitations, lock sets of big size, installation, so only keep a lock the cone Angle of the set of inner sleeve and coat and homemade two bolts tighten the disc. Choose 18 root eight bolts. 8 M20 & times; 120 bolt, bolt tightening torque is not more than 470 nm. In order to ensure the accuracy of good, before installation will need to use gas cutting spindle beheaded for simple processing. Will lock set set in the large diameter on the shaft head, shaft head of large diameter to main shaft broken parts. According to the given torque tighten bolt, lock the spindle head held card in the broken ends of shaft parts. With the locking plate connecting shaft head path and speed reducer hollow shaft fixed together ( See figure 3) 。 3 the effect after transforming the empty trial and load commissioning, equipment normal operation, each part temperature and vibration in good condition, then put into normal use. So far has been used more than 5 months, the limestone crusher run smoothly, the parameter is good, the connection device can meet the requirements of production, save a large sum of cost for the company. Source: 'cement'