Roller press reducer of disassembly and improvement of the bearing

Removal and bearings of the roller press reducer improvements - 2020 10 - 24 high pear (first Gezhouba jingmen cement co. , LTD. ) A company & Phi; 4. 2 m× 13 m cement grinding system of roller press transmission device for the two sets of high power suspension type planetary gear reducer, specifications for RPG29 - 80, the total mass of about 8600 kg. System running more than three years, since the gear reducer internal fault after the disassembly is very difficult, to this, the company by improving the removal of tools and methods, in the quick, easy maintenance of reducer had greatly improved; Through the improvement of bearing, to improve the operation reliability. , improvement of reducer overall demolition plan reducer assembly diagram as shown in figure 1. The first level for the parallel axis, hard tooth face, helical gear; The second and third grade for a planet gear transmission. Reducer output shaft to the slotted structure of hollow shaft sleeve, with locking plate and roller press shaft head connection. Figure 1 RPG29 - 80 reducer internal structure and remove when reducer due to repair or replacement roller machine spindle should be overall demolition, according to the random method, often remove the difficult situation, even the big tonnage jack also will be removed from the spindle speed reducer, hard and because of the space is narrow, work hard, easy to cause damage of equipment. Analysis of the above is the main reason of the difficult to open regular jack in synchronous power works is poorer, not very good removal effect. The company based on the spatial structure in the field, have ordered a special hydraulic sync jack-up system. The system is mainly composed of fixed plate ( Split type) , 8 ~ 12 150 t thin jack, Travel 25 mm) And high pressure gas station and the pressure of control cabinet, can to each thin jack to add, decompression alone. Operation, the thin jack pre-installed on the fixed plate, a fixed plate installed on the spindle taper shaft parts, positioning after one by one for each thin jack synchronization, uniform pressure, speed reducer can be easily removed. Second, according to the fault condition reasonable disassembly scheme with subsection reducer is mainly the first level on both ends of the input shaft bearing damage and secondary transmission of planet gear bearing damage. At first, it is the disintegration of reducer overall demolition, repair, the scheme of process links, big workload, work time is long, often affect cement production. Through the analysis of gear reducer structure found that 1 and 2 transmission part of the shell is divided into three parts, constitute the reducer shell front-end, and reducer shell in the back by the positioning pin connection, and between the front three parts is through positioning pin connection. Structurally, the first level of input shaft and the second planetary gear parts damaged, only need to remove the front, reducer can processing, make the fault handling process simplified, reduce workload, improve efficiency. The company in recent years, with the idea to deal with the two gear fault, the twice the result with half the effort. Three, the structure of the reducer shaft bearing is the first step on the first tier improve the reducer shaft at both ends of the bearing are using imported SKF or FAG bearing, model 23132 cc/W33 / C3. Axial force, is the first step on the analysis in input to the spin of sinistral ( Or right hand) When the shaft will be subject to an incoming ( Or outside) The axial force. The bearing for double LieDiao roller bearing, can withstand the bigger radial load, axial bearing capacity is not high, but when the roller press load is bigger, easy to cause bearing heating, damage. To this end, the company decided to the shaft bearing, high axial bearing capacity of two 7530 tapered roller bearing, the axial positioning device also made corresponding adjustments, meet the requirements of bearing installation. Because the input coupling in the original design adopt universal coupling, better to compensate the input shaft concentricity. After transforming smooth operation, after six months, the shaft vibration is the first step on the measured value in 4 ~ 5 mm/s, bearing temperature transformation of long-term, stable and less fell by about 5 ℃, satisfactory results have been achieved. Source: 'cement'