The roller bearing seat can remove the seal packing before will be delivered to the routine inspection, and will be immersed in washing gasoline containing 3% oil or kerosene in acid free rotation of the outer ring, a retainer, and carefully washed at the junction of the rolling elements and raceways, require any hidden parts of the original residual oil washed out. The roller bearing seat will be attached to dry cleaning oil should be clean, put the table with a clean paper in neutral lining on the dry, or slowly in the far-infrared oven drying. Self cleaning oil spray after drying or drying, the whole process may rotate the roller bearing seat ring, cage or any of the rolling elements.
The roller bearing seat has dry or drying, shall be lubricated and immediate delivery inspection, this time without supporting oil film protection roller bearing outer surface, in the whole course of the examination shall not directly touch the hand skin, the operator should wear clean gloves, or hand coated with anti rust agent, but must avoid anti rust agent on hand with roller bearing seat rolling surface, otherwise it will make the measurement results deviation.
Roller bearing seat after the inspection is completed, should be immediately delivered or used for anti rust inventory processing, the entire inspection process should also be completed, so as not to cause excessive corrosion. Note that the use of pure gasoline without oil cleaning will cause corrosion.
Roller bearing seat used in check before and some check gauge, standard parts and measuring instruments placed together in checking the place a piece of metal plate, which can quickly make the homogenization temperature and room temperature of the objects.
1, roller bearing high temperature: institutional operation, installation of roller bearing seat parts to allow a certain temperature, when the hand touching the body, should not feel hot to normal, whereas that of roller bearing seat temperature is too high.
Roller bearing high temperature causes the lubricating oil quality does not meet the requirements or deterioration, the oil viscosity is too high; tight assembly (insufficient clearance); supporting preloaded roller bearing; roller bearing seat to rotate on the shaft or shell; overload; roller bearing cage or rolling body fragmentation.
2, roller bearing seat noise: rolling roller bearing seat in the work to allow a slight running sound, if the noise is too large or abnormal noise or impact sound, indicating that the roller bearing seat failure. The reason for the noise of the roller bearing seat is complicated, which is the surface wear of the roller bearing seat and the outer ring. As a result of this kind of wear and tear, it has broken the relation between the roller bearing seat and the shell, the roller bearing seat and the shaft. When the roller bearing seat is tired, the surface of the metal peeling off, but also make the roller bearing seat radial gap increases to produce abnormal sound. Roller bearing seat lubrication is insufficient, the formation of dry friction, as well as the roller bearing seat crushing and other abnormal sound. After the roller bearing seat is loose and loose, the cage is loose and damaged, and the damage of the bearing seat of the abnormal roller bearing can also be generated. When the roller bearing seat is disassembled and checked, the fault and damage reason of the roller bearing seat can be judged according to the damage condition of the roller bearing seat.
3, the surface of the raceway metal spalling: roller bearing seat rolling body and the inner and outer raceway surface are subject to cyclical fluctuations in the load, resulting in a periodic change in the contact stress. When the number of stress cycles reaches a certain value, the fatigue spalling occurs on the rolling body or the inner and outer raceway surfaces. If the roller bearing seat load is too large, will make this kind of fatigue. In addition, the roller bearing seat installation is not correct, shaft bending, will also produce raceway spalling phenomenon. The fatigue spalling of the roller bearing seat can reduce the running accuracy of the shaft, so that the vibration and noise can occur.
4, roller bearing burn burn: roller bearing seat of the raceway and rolling body temper on. The cause of the burn is generally insufficient lubrication, lubricant quality does not meet the requirements or deterioration, as well as roller bearing seat assembly is too tight.
5, plastic deformation: roller bearing seat roller and roller contact surface uneven pit, the roller bearing seat plastic deformation. The reason is that the local stress of the working surface of the roller bearing seat is greater than the yield limit of the material under the large static load or impact load.
6, roller bearing ring crack reason of roller bearing seat ring crack of roller bearing seat may be too tight, roller bearing seat or foreign inner loose, support deformation containment of roller bearing seat, is provided with a supporting surface processing roller bearing bad etc..
7, cage fragmentation: the reason is the lack of lubrication, rolling body broken, seat skew, etc..
8, the holder of the metal adhesion on the rolling body, the possible reason is that the rolling body is stuck in the cage or lack of lubrication.
For the roller bearing seat, the selection of materials is more cautious, because the roller bearing seat is mainly under pressure, so it should be able to meet the requirements of the roller bearing seat. Can choose the gray cast iron, nodular cast iron or cast steel, but considering the selection of cast iron is better, because gray cast iron has good abrasion resistance, liquid flow, the solidification shrinkage of small, high compressive strength, good shock absorption, use adequate light and rigid, and the price is suitable for the situation. Grey cast iron. In gray cast iron is commonly used and he HT200 good performance, easy processing and casting |
