Sliding bearing assembly

Sliding bearing assembly - 2020 07 - 06 Wang Zhanguang ( Jiaozuo strong cement) Sliding bearing is shaft support and guarantee the stability of the important parts, in a bowl, assembly points many forms according to need. The shallow interpretation of the sliding bearing assembly requirements. A red, tile and the bearing assembly of copper, iron and clay, babbitt watts and some nonmetal tile, etc. On tile structure itself, some have some sort of material or some kind of alloy made directly, or combination, such as large tile kiln is consists of watts tire with tile lining mill large tile is tile lining pouring on the tile tyres. Other structure are also different, we call not open points such as' a '. Today we mainly said split bearings. 1, the split bearing shell and assembling split tile with bearing points, tile, shut middle surface additive gasket to adjust. But for cement kiln without synthetic grinding the whole tile, just under two-thirds of the tile or tile. Bearing with tile seat assembly, tile cylindrical and bowl inner hole with small clearance ( 0. 1毫米) Surplus (or transgressions 0. 00 ~ 0. 04mm） Coordination, difficulty under tile cylindrical parts contact with the bowl to reach more than 60%, and the contact spot spacing are controlled within 5 mm, inside of the skirt and watts should reach no clearance fit. In order to prevent hi-lo in running up and down, should be on the diagonal of the tile positioning pin; In order to prevent internal rotation, in watts watts back with tile should be set between the positioning pin. Between the seat cover and the watts to stop mouth and dowel locating, and check the side the interference fit, interference quantity generally 0. 04 ~ 0. 6 mm, the other side USES the clearance fit, the gap is in commonly 0. 03 ~ 0. 15mm。 2 with tile, tile on the shaft and the shaft is key, including the tip clearance and the clearance requirements, to facilitate the formation of lubricating oil film, reduce friction and prolong life. Improper clearance, not only will cause bearing heating, also can cause vibration, even cause burning shaft, tile burning accident. Bearing clearance and the equipment running accuracy, speed, load, bearing shell material, lubricating oil and other related factors, should choose correctly, but for cement equipment, its tip clearance can press type selection: a = kd type a is tip clearance in mm. K for coefficient of 0. 0015-0. 002. D for the nominal diameter mm of shaft. The bearing clearance b = ( 0. 5 ~ 1. 0) A type: b for mm, lateral clearance for a tip clearance mm. About the clearance between the shaft shoulder and bearing shell tile skirt lateral, do can be divided into two steps. For locating bearing shell, can press on both sides of the gap is not greater than the sum of 0. 2 mm to control; For the positioning end bearing bush, according to the operation of axial expansion amount control. About bearing clearance inspection, axial clearance can be directly measured with a feeler, side clearance can put bearing shell buckle on the shaft, and then use feeler detection. But the top gap detection because of the influence of the shoulder, feeler is difficult, can use indirect measurement of pressure lead method. Wazhou and tile gap adjustment: tile edging space to the clearance can be accomplished by means of scraping research, processing, tip clearance is through tile edging and subtract gasket to adjust. Second, scraping of research in addition to assembly, is of research, is the most important work, to determine the tile of axis Angle, if two shaft contact with tile up to par. Tile in kiln, grinding of cement enterprises is composed of watts tire with tile lining, watts tire outer spherical contact with spherical tile, tile lining cylindrical contact with tile tire inner hole, line is in contact with the shaft, general in 60 ~ 75 degrees Angle, Angle is too large for oil wedge formation, does not favor the lubrication; Angle is too small, the bearing capacity drops, wear quickly. Angle measurement methods: due to ground tile only on tile kiln, not under tile, so testing shall mean the tile. Shave watt-hour first calculated according to draw the Angle of Angle, and then open tile edging, tile edging gradually increased from the bottom up. Angle measuring feeler, first turn on the tile with shaft buckle and to 0. 05 mm plug don't go in for in the end, and then calculated according to Angle feeler into depth. Detection of different depth tile edging clearance, can use different thickness of feeler. Scraping the inquiry accuracy requirement, general spherical tire outer spherical contact flecked with watts spacing should be less than 5 mm, and we have to tile edging gradually lighter at the bottom of the spot, the tire requirements as lining with watts. Shaft contact with tile lining the highest precision, flecked spacing is less than 3 mm. Above is bearing assembly method and kiln cement enterprises of grinding accuracy, because individual level is limited, the hard to avoid wrong, please correct me criticism. （ Source: wisdom cement)