1, bearings and axis with the base of hole drilling, choose has rational structure of good precision bearings maintains a bearing and the shell with a task of the system. Bearing dimension tolerance and rotation of the numerical precision of GB 307-84 rules.

 

2,  bearing the shaft with neck and bearing the hole of GB 1031-83 regulation, shaft neck roughness Ra value is less than 1.6 u m, bearing the hole roughness Ra value is less than 2.5 u m.

 

3, GCr15 and with ZGCr15 steel manufacturing bearing collar and roller, use and vibration or vibration isolator is to reduce the bearing noise or isolation bearing noise and the roller rings the hardness value should be 61 ~ 65 HRC; With GCr15SiMn and ZGCr15SiMn steel manufacturing, its hardness value should be 60 ~ 64 HRC. The examination method and hardness on the same part of the uniformity of the hardness in JB

The provisions of the 1255.

 

4, rolling bearing noise a is bearing itself of the bearing inspection of the radial clearance and axial clearance shall conform to the provisions of the GB 4604-84.

 

5, rolling bearing the inside of the ring groove should be no peel, severe wear, inside and outside circle shall not have crack; Ball should be no wear, maintains a no serious deformation, turns no abnormalities, noise and vibration, stops should be gradually stopped.

 
6,  a class C tolerance taper roller bearings, the company's north American topped the iron will of the machine tool market now roll collar stand and roller of the tao precision contact, in certain load under the action of being colored check, contact mark should be continuous, contact length should not be less than 80% of the roller bus.
 
 

sliding bearing—NSK bearing centrifugal pump maintenance of technical standards

 

1, radial thick wall tile

 

(1) by pressing lead method, lift shaft method and other ways to measure the clearance of bearing and tile shell over surplus quantity, axial clearance comply with the requirements, the shell over surplus quantity shall be 0 ~ 0.02 mm.

 

(2) check the parts, Qingdao rui fine bearing of the professional maintenance bearing mechanical inspection shall be no damage and crack, axle bush should have no peel, porosity, crack, tao and partial grinding burns slot.

 

(3) and shaft bearings neck of contact with coloring in check, check the Angle should be no 60 ° ~ 90 ° (speed is higher than 1000 r/min, take the lower limit below 1000 r/min speed limit of take). In contact range requirements contact even, each square centimeters should have 2 ~ 4 the contact point, if contact undesirable, they must be scraping the inquiry.

 

(4) cleaning the bearing box, the oil hole unimpeded, rolling bearing rotating machine is the important parts may not have crack, leakage.

（5）watts and back even joint bearing should be closely, with coloring check, the contact area of not less than 50%.

 

2, for radial thin-wall watts

 

(1) location of alloy layer and tile shell should be stable closely, without delamination, shelling phenomenon. Alloy surface and two watts of points face should be smooth, level off, does not allow to have the cracks, porosity, heavy leather, slag and bruising wait for blemish.

 

(2) the tile and back in the hole the bearing surface should be closely even joint, rolling bearing main parts processing process using coloring check, less than 180 mm diameter, the contact area of not less than 85%, is equal to or greater than 180 mm diameter, the contact area of not less than 70%.

 

(3) and shaft bearings with clearance and the contact of the neck by machining precision in the guarantee, the contact area is general not allow blow grind, if along the axial contact not even, can be a little nap.

 

(4) the assembly, Qingdao rui fine bearing mechanical and electrical determination method of clearance bearing in the use of 0.02 mm face points the feeler check, shall not into for qualified.

 

3, to thrust bearing

 

(1) bush should have no wear, deformation, crack, scratch, take off layer, rolling and burn defect; With the thrust of the dish the contact point should be uniform marks, the contact area should not less than 70% and the whole circle each WaKuai uniform; The group WaKuai thickness difference should be no more than 0.01 mm, WaKuai babbitt should according to the direction of rotation circle JinYou wedge, and lubricant into; Smooth surface smooth back late.

 

(2) the adjustment should be smooth, level off, gasket material influence of the bearing keep to bearing operation quality not bend and with greater than 0.01 mm thickness bad not of a layer of washers.

 

(3) in the bearing assembly repeatedly using push cover after axis method for measuring the thrust bearing clearance, the value should be within the scope of the requirements. In this way to measure and axial displacement probe side with the thrust bearing clearance must be consistent, and the prescribed adjust good displacement probe instructions zero.

 

(4) the bearing shells with tight level surface, good bits. Should attach great importance to the rolling bearing commodity conventional check the oil temperature of oil hole and tile to cover the eyes on, not skewed. The oil hole clean smooth.



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