INA deep groove ball bearings are overheated in 4 specific treatments

When the INA bearing temperature rises, first judge whether it is malfunctioning. If it does rise, it should be treated as follows:
(1). Check the cooling water pressure, water flow and piping system is normal. If the water pressure is low, the filter may be clogged and cannot be disposed of in time. It can be shut down and put into use when it is confirmed that it can work.
(2). Check the oil pressure of the governor. If the oil pressure is low, the cooling water hydraulic valve may be closed.
(3). Check if the INA bearing has abnormal sound and check whether the deep groove ball bearing swing is abnormal.
(4). Observe the oil sample to see if there is any change in the oil color, and test it to see if it has deteriorated. If deterioration is confirmed, stop replacing the new oil.
(5). Check if the oil level is normal. If it is not normal, check if the oil drain valve is closed. If it is closed, it should be replenished. If the gasket is oily, it should be stopped.
When we use INA bearings, if we find that the temperature is very high, then quickly stop the equipment operation, and find out the cause, and follow the solution provided above, but may be due to deep groove ball bearings heating The reasons are different, so the solution is different, so it is still necessary to treat the specific situation and complete it with the help of technicians.
(1) Filling method
The so-called fat filling method is to fill the INA bearing working surface with a proper amount of grease on a regular basis, which is the most commonly used grease lubrication method.
(two) oil cup method
The oil cup method is to provide a cap-type oil cup or a pressure oil cup on the bearing housing, and periodically rotate the screw cap or inject the grease with a grease gun. This is also a common way of grease lubrication.
(3) Pressure fat supply method
The pressure supply method relies on a grease pump to supply grease. At this time, a grease with good fluidity should be used.
(4) Centralized lipid supply method
The centralized grease supply passes through the grease pump while supplying grease to each deep groove ball bearing and other components. Similarly, at this time, the grease should use grease with good flow, oxidation resistance and corrosion resistance, and it is also a pressure supply method.

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Effect of INA combined bearing noise on running accuracy

First noise related to bearing manufacturing: including cage noise and vibrato, cage noise mainly occurs in ball bearings and tapered roller bearings. When the combined bearing rotates, the cage vibrates and the cage collides with the rolling elements. It will make a sound. This sound has periodicity. The vibrato (various bearings) is a sound with a certain frequency, which is caused by the vibration caused by the large waviness on the raceway surface. This phenomenon is the most common. The problem, we need a lot of attention in the future. In particular, we are learning some INA bearing knowledge students, to take a closer look at these key elements, may be some help for you.
Noise caused by improper use of the second: It exists for all kinds of bearings. When the bearing raceway surface or the rolling element surface is bumped, crushed, rusted, there will be a certain period of noise and vibration. When the bearing is in operation When dust invades, it will produce dirt noise. This noise is non-periodic, and it is also accompanied by vibration. The sound is not fixed in size and sometimes not.
The third intrinsic noise: the rolling sound and various bearing and rolling friction sounds are the inherent sounds of the rolling bearing. The rolling sound is generated by the elastic characteristics of the rolling element in contact with the raceway. When the combined bearing rotates, the rolling element is rolling. A continuous and sleek sound from the rolling of the road; abnormal rolling friction sounds can produce an uncomfortable metal friction abnormal sound such as "squeaky, squeaky", and does not emit such a sound when it is well lubricated. Therefore, in general It is not a problem, only attention should be paid after the noise increases.
After the INA bearing is installed in the main machine, if the radial runout of the combined bearing main shaft is measured, it can be found that the measured value of each revolution has a certain change; when the measurement is continuously performed, it can be found that after a certain number of revolutions, the change will occur. Approximately repeated. The index for measuring the degree of change is the cyclic rotation precision, and the change approximately repeats the required number of revolutions to represent the "quasi-period" of the cycle rotation accuracy. The magnitude of the magnitude change in the quasi-period is large, that is, the cycle rotation precision is poor. .
If the bearing spindle is properly preloaded, the speed is gradually increased to near the working speed to implement the "run-in" function of the bearing, which can improve the cycle rotation accuracy of the spindle.
Measure the size of the shaft and the bearing housing hole to determine the matching precision of the combined bearing. The matching requirements are as follows: the inner ring and the shaft adopt an interference fit, and the interference is 0~+4μm (0 in light load and high precision); The clearance between the ring and the bearing housing hole is 0~+6μm (but when the bearing at the free end uses the angular contact ball bearing, the clearance can be increased); the roundness error between the shaft and the seat surface is less than 2μm, and the bearing is used for separation. The parallelism of the end face of the ring is less than 2μm, the outer end face of the shoulder shoulder is less than 2μm; the runout of the bearing seat hole is less than 4μm; the inner end of the front cover of the main shaft has a runout of 4μm or less.
Installation of the fixed-end front bearing on the shaft: Thoroughly clean the INA bearing with clean cleaning kerosene. For grease lubrication, first inject the organic solvent containing 3% to 5% grease into the bearing for degreasing and then use the oil gun. Fill the bearing with a certain amount of grease (10% to 15% of the bearing space volume); heat the combined bearing to raise the temperature by 20 to 30 °C, load the bearing into the shaft end with a hydraulic press; press the adapter sleeve on the shaft and With the appropriate pressure against the bearing end face for axial positioning; the spring balance tape is wound on the outer ring of the bearing, and the method of measuring the starting torque is used to verify whether the specified preload has changed greatly (even if the bearing is correct, However, due to the deformation of the fit or the cage, the preload may also change.

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