Study of sprocket shaft bearing group bearing removal method

Sprocket shaft bearing group research 2018 - bearing removal method 08 - 22 Meng Fan ( Ningxia bull-running industrial group co. , LTD. , final assembly factory, heaven and earth in its mouth, 753001) Abstract: sprocket shaft set used in the mine, the environment is bad, the bearing outer ring and bearing seat for surplus to cooperate, cause in the process of maintenance is difficult to remove, bearing damage easily. Remove the tooling design, reduce the labor intensity, improve the efficiency of disassembly, and widely used in actual production, use effect is good. Key words: bearing bearing; Remove the method; Improve efficiency 0 introduction sprocket shaft group is an important part of coal conveying equipment, and the motor, reducer, scraper chain of the transmission chain, its structure is shown in figure 1. In recent years, the repair of coal product has become the new economic growth point, how to quickly, high efficiency and low cost of repair is the key point of product maintenance process to consider problem. And quickly remove bearing in the bearing seat ( FIG. 2) And ensure the quality of bearing of disassembly, sprocket shaft has been set to repair a key cog. Between bearing outer ring and bearing seat for surplus to cooperate, long axis group in coal mine cause bearing corrosion, deformation under the condition of use. To remove the great difficulties. This article mainly on raising the sprocket shaft group bearing tooling to research the design of bearing removal efficiency. 1 status at present when removing bearing bearing, the operator by hammering method: with the cover plate is placed on the bearing inner ring as a stress point, with frequent hammer knock, the operator of the intensity of labor is very big, need a few people take turns to exchange of hammer, remove a plate bearing need at least three operators work 30 minutes, at the same time because of frequent impact, bearing damage, more easily lead to repair need to change the bearing, due to the maintenance cost increases. 2 2 tooling design. 1 with pump station as a source of power for the composite tooling technology principle, by using hydraulic thrust oil cylinder to provide sustained, stable and uniform pressure. By adjusting the oil cylinder, the connecting plate spacing 7 group of 50 mm bolt hole distance, to ensure that the thrust cylinder according to the center of the bearing in the vertical direction adjustment, Adjust the 300 mm) , 2 pieces of damper can be horizontal adjustment according to the bearing outside diameter ( Adjust the 650 mm) With adjusting bolt fixed, can satisfy at present the use of all types of shaft group ( Figure 3) 。 2. 2 technical creative advancement (1) spare resources recycling, use the repair out old oil cylinder in the process of modernization, and equipment manufacture cost is low. (2) through a pumping station hydraulic thrust bearing within the cylinder disassembly bearing instead of human, avoid to use hammer percussion, reduce the labor intensity of operators, more important is to avoid the impact of the frequent damage to the bearings. (3) the tooling can be adjusted with flexible product oil cylinder center and the location of the damper, to meet the needs of different types of disassembly. (4) adopts horizontal structure, simple and convenient operation, safe and reliable. 2. 3 degree of maturity of the mature technology, the applicable scope is wide, can meet the demand of different bearing bearing of disassembly, and safe and reliable, and is widely used in production. （ Figure 4, 5) 3 conclusion after on-site validation, the tooling can general, improve the production efficiency, use fixture remove only need two operators to work 15 minutes to complete, the production efficiency increased by 66%, the labor intensity of operators greatly reduce; The most important thing is to use the tooling after removal of the bearing in good condition, can use again after cleaning, economic benefit is significant. References: 1] Huang Xiaohua, jian-cheng xu. Pro/ENGINEER mechanical design and manufacturing [ M] 。 Beijing: electronic industry press, 2010. ( 2] The China machinery industry federation. JB / T5000 - General technical conditions part 10:2007 heavy machinery assembly [ M] 。 Beijing machinery industry press, 2008. ( 3] ShenYongSheng. Mechanical principle course [ M] 。 Beijing: tsinghua university press, 2005. Source: the value engineering 2017, 35