Rolling mill four row tapered bearing application requirements - knowledge

Four row circular cone roller bearings, because it can bear larger diameter, the axial union load, and at the same time axis in the case of clearance fit can run more stable and meet the requirements of the quick disassembling, and can be used independently ( Don't configures auxiliary bearing) Can directly reduce the width and length of the roll bearing housing, reason this type of bearings is the favour of mechanical equipment manufacturers, selection for mill often used in the middle of the roll and work roll. This type bearing installation requirements than other radial load bearing complex, in addition to the necessary tolerance matching, installation order, more requirements related to cooperate to meet the following requirements: a typical type 380000, keep the intervene problem four row tapered bearing consists of two double row roller components ( Rolling body, cage and inner ring) And a double outer ring and two single outer ring, two side baffle, an inner circle of insulation. Due to the structure limit, its cage 2 - tend to highlight the internal and external ring height 7毫米( Series of different structure and size, height) , often lead to cooperate with the cage, intervene with cage caused by wear, jam, deformation and failure, serious when online burning down bearing fault. So must request with parts size appropriate spacing with cage. Especially for the following position: 1, end gland 1 mouth and maintains a end capping the reach mouth diameter and maintains a prominent part of the outer diameter, distance is not less than 3. 5mm。 2, axial locking ring and maintains the axial locking ring diameter and maintains a prominent part of the inside diameter, distance of not less than 3. 5mm。 3, face pressure 2 cover mouth and cage end gland 2 the reach mouth height and maintains a prominent outer height not less than 4 mm height difference with distance. Second, the inner ring and the axial compression ring 1, bearing inner ring end face and the axial compression ring end face to keep zero. 25 - 0. 45 mm axial spacing, slow down the inner ring and clamping ring end face and wear; Slow tilt of bending roll and the thermal expansion of the harmful effects of bearing inner ring and bearing load. 2, the outer diameter of inner ring end face and compression ring end face diameter values are equal or slightly smaller ( ≯3毫米) To prevent the inner ring wear caused by compression ring compression ring end face wear sag. 3, bearing inner ring end face or lateral compression ring end face to open tank ( Circular trough) , increase the lubrication between the two end face, also slow down the end wear away, edge, etc. 3, 1, inner diameter and inner diameter and the diameter of axle diameter of axle cooperate in can realize fast (unloading is fast Cooling can be quickly installed, when the machine can be fast discharge) Under the premise of maintain minimum fit clearance, slow down the diameter of axle and bearing aperture and wear; Reduce the bearing inner ring relative to the axis of the sliding friction. 2, at shaft corresponding bearing inner ring end face of two joint open tank ( Circular trough) Prevent the chamfering and bearing inner ring baffle and the diameter of axle surface friction, the surface of the hair. Four, moving maze ring ( Shoulder) With inner ring 1, dynamic labyrinth ring ( Shoulder) Outer diameter and cooperation of the inner ring end face diameter values are equal or slightly smaller ( ≯3毫米) Labyrinth, prevent inner ring wear ring ( Shoulder) Lead to dynamic labyrinth ring ( Shoulder) End face sag, edge, etc. 2, verbal labyrinth ring ( Shoulder) End face or lateral bearing inner ring end face to open tank ( Circular trough) , increase the lubrication between the two end face, slow down the end surface wear. 3, dynamic labyrinth ring ( Shoulder) Outer diameter surface hardness is not lower than HRC45, contact with the sealing lip roughness value recommended 0. 25 - 0. 5 um, preventing and sealing lip wear and damage to each other. Five, high bearing outer ring assembly with high end gland 1, keep the outer ring assembly with two end cover are in a state of press close to close, protect the preset clearance of bearing, especially radial load working condition of larger occasions, such as: rolling mill bearing roller. 2, change after bearing must readjust the outer ring assembly with high end cover, adjustment, Inelastic TAB) Error of pressure or clearance 0 0. 05mm。