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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>The problems presented by NTN imported bearings and their solutions The problems presented by NTN imported bearings and their solutions
Before using NTN imported bearings; first look at the bearing's appearance; then be able to measure whether the bearing is loaded with their needs and standards. The bearing appearance should be operated under the astigmatism; the crack and the surface of the bearing should be specific View of. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
First, the bearing tumbling sound:
Even if the bearing is damaged by slender peeling, the sounder is used to review the size and sound quality of the rolling sound of the bearing in the operation. The abnormal sound and the irregular sound are also announced; the sounder can be distinguished.
Second, the bearing oscillation:
For example, shedding, indentation, rust, cracks, wear, etc. are reflected in the bearing oscillation measurement; bearing oscillation is very sensitive to the damage of NTN imported bearings. Therefore, it can be measured by selecting a special bearing oscillation measuring device (frequency analyzer, etc.) The size of the oscillation; the abnormality of the frequency is determined by the frequency. The measured value is not consistent with the operating conditions of the bearing or the position of the sensor device; therefore, the measurement value of each machine is analyzed beforehand to determine the resolution standard. .
Third, the temperature of the bearing:
Generally, the temperature outside the bearing can be inferred; the temperature of the bearing. It is assumed that the oil hole can directly measure the temperature of the outer ring of the bearing; it is more suitable for the world; the temperature of the bearing gradually increases with the operation; arrives after 1-2 hours. Invariant shape. The normal temperature of the bearing is due to the heat capacity of the machine; the heat dissipation; the speed and the load are not combined. Assume that the smoothness and the device are suitable; then the bearing temperature rises sharply; the abnormal high temperature will occur; the intermittent operation must be performed; Method. According to many test data; Table 4-1 lists the uniform value of the outer ring temperature in the bearing mission of various types of machinery; for reference. Because the temperature is affected by smoothness, speed, load, condition; the table value only leaks Reflecting the approximate temperature limit. The thermal sensor can be used to monitor the mission temperature of the bearing at any time; and when the temperature crosses the gauge value, it automatically alarms the user or interrupts the ignition axis.
Fourth, smooth:
There is no normal smoothness; smoothness has a significant impact on the fatigue life of the NTN bearings and the conflict, wear, temperature rise, oscillation, etc. The bearing can not work. The reason for the bearing damage is marked; 40% of the bearing damage is bad with smooth Related. Thus; the outstanding smoothness of the bearing is a useful way to reduce bearing conflict and wear.
The bearing of the rolling bearing in the bearing is due to its own quality and external conditions; its bearing ability; rotation accuracy and friction-reducing function will change; in fact, any use will reduce the life.
However, what we want to say here is that when the function index of the bearing is lower than the operating demand and cannot work normally; it is called bearing damage or failure; if the bearing is in an accidental situation such as damage, it will show that its machine and equipment are stopped; The function is damaged and various anomalies. Therefore, the reason for the need to investigate the attack in a short period of time; and adopt the corresponding method; of course; the condition of the rolling bearing damage is much more messy than the damage of the usual mechanical parts; the characteristics of the rolling bearing damage are reflected There are many ways; the reason is disordered; the damage of the bearing is in addition to the connotation elements of bearing depiction and production; most of them are caused by improper use; the bearing is not reasonable; the device is not properly installed; the smoothness is poor; the sealing is not good, and other external factors are caused.
Seeing here, you should know some of the elements of rolling bearing damage; therefore, it is important to discuss the composition and cause of rolling bearing damage; on the one hand, it can improve the application method; use the bearing correctly; give full play to the performance of the bearing; On the one hand, it helps to develop new products with better functions. In addition to the precautions, device methods, operation supervision, etc. in the application of rolling bearings, this paper also focuses on the analysis of the damage and the reasons for the damage of NTN imported bearings and the countermeasures to be adopted.
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The problems presented by NTN imported bearings and their solutions
Source: Bearing network time: 2014-07-08