A certain power plant in ningxia Flemish vertical mill reducer technical renovation and maintenance

A certain power plant in ningxia Flemish vertical mill reducer case 2020 - technical renovation and maintenance 12 - 15 ( Source: xi 'an heavy gear box co. , LTD. ) A certain power plant in ningxia Flemish vertical mill reducer KMP300 formal operation in 2009, the run time for 10 years. Occurred during the use reducer high speed shaft leakage, noise big, and so on and so forth. At the same time, in order to improve the coal mill output, at the request of power plant's plan to transform to speed reducer. Complete dismantling KMP300 in January 2019. After the collapse of found, three-piece pitting corrosion is serious; The rest of the gear, structure belongs to the scope of normal wear and tear, can be repaired. According to solve the oil leakage and improve the output of the mill by the user demand, our company in addition to the normal maintenance, two technical transformation of speed reducer. 1, speed up reform, through calculation, the screw umbrella deputy to adjust teeth, modulus, on the premise of guaranteeing assembly space and gear life, change the overall transmission ratio, gear box to improve the output speed. My company based on the thermal power industry more than ten years rich experience in maintenance and strong heavy gear design and processing capacity, will eventually output rotational speed by 35. 3 r/min up to 43. To speed 358 r/min, 22. 8%. 2, sealing modification: based on the existing high-speed shaft assembly dimension chain, design a new form of mechanical seal, in order to make sure no oil leaking in the high-speed shaft operation. The deceleration machine delivery in May 2019, has run for more than half a year. Based on user feedback, reducer, speed does not appear after the vibration and sound; Mechanical seal transformation running well, does not appear the spill. The following for KMP300 vertical mill reducer disassembling time node and time table. My company emergency time limit for a project to meet the customer at the same time, also strict process control for repair. Here is KMP300 Flemish vertical mill reducer into the factory from the show to the whole process of the factory. Reducer to factory deceleration machine Lord element damage, intermediate steps 1, 2, inner gear pitting set up department injury serious 3, the sun wheel tooth under strain, adjust the pits of gear tooth surface of spiral umbrella shaded platform KMP300 encountered difficulties in the process of maintenance is as follows. Flemish reducer design compact, speed up reform limits, to the design ability, tooth processing ability put forward higher requirements. Flemish reducer high speed shaft itself with more complex mechanical seal, oil is still happen. New mechanical seal plan is proposed for my company, put forward higher requirements. Overall maintenance period is short, high time limit for a project for assembly, gear parts processing requirements. KMP300 puts forward two technical transformation scheme, a trial for my company's comprehensive strength. Based on customer feedback in the field of site condition, running for half a year since the reducer state steady, low noise, normal temperature, no funnelled. The technical transformation and maintenance quality also get the user high praise.