The removal of bearing and install also carefully.Careful not to damage the bearing and the parts, especially interference fit the bearing down, and the operation is difficult.So, in the design stage to consider in advance to facilitate disassembly, designed and manufactured according to need remove the tools is also very important.When disassembling, according to the drawings the disassembly method, sequence, investigation of bearing with conditions, to ensure foolproof disassembly operations.

The removal of 1, the outer ring Remove the interference fit of the outer ring, whether in setting several outer shell on the circumference of a circle of extrusion screw with screws, one side equal to tighten the screw, remove.The screw hole cover usual blind plug, the separation of tapered roller bearing type bearing, shoulders set several incisions in the shell, using block, remove by press, or tap the disassembly.

The removal of 2, cylindrical hole bearing Remove the inner ring, can use simple mechanical pull out the latest pressure.At this time, must pay attention to the inner ring under the pulling force.

Remove the oil pressure method is used to large bearing inner circle.By setting on the axis of hydraulic oil hole, in order to make easy to pull out.Width of the bearing is oil pressure method and drawing fixture and disassembly operations.

NU, NJ cylindrical roller bearing inner ring remove can take advantage of the induction heating method.In a short time heating the local, make the inner ring expansion after drawing method.

The removal of 3, cone bearing hole Removal of relatively small tight sleeve bearing, with fastening on the shaft gear support inner ring, the nuts back a few times, use the block with a hammer beating the disassembly.

Large bearing, using the hydraulic remove easier, in the oil hole on the shaft taper hole pressure oil, make the inner ring expansion, remove the bearing method.Operation, has a bearing may suddenly emerge, it is best to nut used as gear block as well. The installation of the bearing The installation of the bearing is correct, affects the precision, life and performance.Therefore, design and assembly department for the installation of the bearing be fully studied.Hope to work in accordance with the standards for installation.Operation standard project usually is as follows:

(1), cleaning bearing and bearing relation department (2), check the size of the interrelated parts and finish machining (3), installation, (4), installed bearing after inspection (5), supply lubricant At least before the installation, just open the bearing packing.General grease lubrication, cleaning, not directly fill grease.Lubricating oil, ordinary also don't have to be clean, but, instrument using or high speed bearings, etc., to be washed with clean oil, remove rust inhibitor) on the bearing.Remove the rust inhibitor of bearing, easy to rust, so cannot be placed.Also, has the bearing grease sealed, not directly use cleaning.

Bearing installation method, because the bearing structure, cooperate, conditions vary, in general, as more as the axis of rotation, so the inner circle need interference fit.Cylindrical hole bearing, multi-purpose press pressure into, or multi-purpose hot charging method.Taper hole, installed directly on the taper shaft, or use the socket installation.

When installed on the shell, clearance fit more commonly, outer ring have surplus quantity, usually use the pressure into the press and or have shrink fit method of cooling after installation.Use dry ice as coolant, shrink fit installation, the moisture in the air condenses on the surface of bearing.So, need a good rust prevention measures.

1, cylindrical hole of bearing installation (1) using press press it into Widely used small bearing press press it into.Bedding block, pad into the inner ring with press pressure to the inner ring and closely contact with quietly at the axle gear shoulder.Will block installed inner ring, outer ring fitted is the causes of indentation rolling path, crushed, so be absolutely prohibited.

Operation, it is best in the mating surfaces with oil.To use a hammer beat installation, to inside is mat mat on the piece of work.This practice has become the cause of the bearing operating, so, only used surplus quantity is small, cannot be applied to large amount of interference, or medium and large bearing.

Such as deep groove ball bearings, such as the separation type bearings, inner ring and outer ring needs to be interference quantity installed occasions, with block MATS, with a screw or hydraulic press the inner ring and outer ring at the same time, into the.Self-aligning ball bearing outer ring is easy to lean, if not interference fit, also the best mat block installation.

Such as cylindrical roller bearing, tapered roller bearing separation type bearings, inner ring and outer ring can be installed on the shaft and housing, respectively, will be installing a good combination of inner ring and outer ring, the key is the both firmly closed, so that the center does not produce deviation, barely pressure membership of raceway surface caused by card.

(2) the hot charging method Large bearing, the force that press a trendy takes a lot of, so it is difficult to press in.Therefore, in the heart of the oil bearing heating, expansion, and then loaded on the axis of the hot charging method is widely used.Using this method, you can not add inappropriate to bearing force, finish your homework in a short period of time. Heating temperature of the bearing to the bearing size, the required amount of interference for reference.Hot charging work related matters needing attention are as follows:

(a) will not be bearing heated to above 120 ℃; (b) to make the bearing is not direct contact with the bottom of the tank, it is best to consider put on the metal mesh, bearing or bearing hung; (c) the bearing heated to higher than the required temperature 20 ℃ to 30 ℃, so that will not happen in inner ring cooling operation, difficult to install; (d) after installation, bearing cooling down, width contraction, so use shaft nut, or other appropriate method, make it tight, in case of gap between inner ring and bearing retaining shoulder.

2, taper hole bearing installation Taper hole bearing is directly to the inner ring fixed in the cone axis, or use of set cover, remove the sleeve mounted to the cylindrical shaft.Large self-aligning bearing multi-purpose hydraulic installation. 3, check operation : bearings after installation, in order to check whether the installation is correct, to the examination of the operation, small mechanical rotate confirm whether can use the hand well.Check project has caused by foreign bodies, scar, indentation and seized up, bad for installation and the installation seat processing bad and the imbalance of the rotating torque, the seal clearance is too small, the installation error caused by friction torque, etc.If there is no abnormal can start power operation.

Because of heavy machinery can't manual rotation, so the no-load start immediately after turn off the power, to inertia, check whether there is presence of vibration, noise, rotating parts contact, etc., confirmed that operate without exception into power.

Dynamic operation, from the beginning of the no-load speed, rated operation conditions to slowly.Test run to check the items, whether there is abnormal sound, leakage of the transfer of bearing temperature, lubricant and discoloration, and so on.In test run if discovery is unusual, should stop immediately, check the machine, it is necessary to unload bearing inspection.

Shaft bearing temperature check general appearance supposedly from housing.But using the oil hole, direct measurement: bearing outer ring temperature, more accurate.Bearing temperature began to rise, without exception, usually stable after 1 ~ 2 hours.If because of the bearing or install such bad, bearing temperature will rise sharply, appear different Chang Gaowen.The reason such as lubricant, bearing clearance is too small, too much bad installation, excessive friction sealing device, etc.High-speed rotation, bearing the lubrication methods selection error is also the reason.