What should be paid attention to to to prevent IKO joint bearing failure
First, the reasonable design and advanced nature of the structure will lead to longer IKO bearing life. The manufacturing of bearings generally goes through multiple processing processes such as forging, heat treatment, turning, grinding and assembly.
The rationality, advanced nature and stability of all the processing technologies will also affect the life of bearings.What should be paid attention to to to prevent IKO joint bearing failure
Among them, the heat treatment and grinding processes that affect the quality of finished bearings are often more directly related to the failure of bearings. In recent years, the research on the metamorphic layer on the working surface of bearing shows that the grinding process is closely related to the surface quality of bearing.
What should be paid attention to to to prevent IKO joint bearing failure
The feature of paint rust is that it often occurs in sealed motors. The sound of the motor is very good during assembly, but after it is put in the warehouse for some time, the abnormal noise of the motor becomes very large, and there is serious rust when the bearing is removed. In the past, many manufacturers thought it was the problem of IKO bearing. What should be paid attention to to to prevent IKO joint bearing failure
Now the motor factory has realized that it is mainly the problem of insulating paint. This problem is mainly because the acid substances volatilized from insulating paint form corrosive substances at a certain temperature and humidity, which corrodes the bearing channel and leads to bearing damage.
At present, the problem can only be to select good insulating paint and assemble after drying and ventilation for a period of time.What should be paid attention to to to prevent IKO joint bearing failure
The service life of bearing is closely related to manufacturing, assembly and use. It must be done well in every link. Only by paying attention to the above precautions in the use of articulated bearing, can the bearing be in the running state, so as to prolong the service life of bearing.What should be paid attention to to to prevent IKO joint bearing failure
In order to ensure that the bearing always operates in good condition, regular maintenance and repair is necessary, so as to prevent accidents and prevent accidents, improve the production efficiency of the enterprise and save costs.
To engage in the professional maintenance of bearings here, there must be a standard and systematic operation process, including operation status, lubricant, regular disassembly, noise, temperature and so on.What should be paid attention to to to prevent IKO joint bearing failure
Selection and control of shaft and bearing tolerances
After the bearing is pressed into IKO bearing, it shall rotate flexibly without blocking feeling. If there is obvious inflexible rotation, it indicates that the size of the shaft is too large and the tolerance should be reduced. What should be paid attention to to to prevent IKO joint bearing failure
If there is an obvious “rusty” feeling when the bearing is rotated by hand after being put into the bearing, it may be that the tolerance of the bearing is too large or the roundness of the bearing is not good.
Therefore, when controlling the tolerance of shaft and bearing, we should also control the roundness.What should be paid attention to to to prevent IKO joint bearing failure
Prevention of foreign matters during assembly
When the bearing is installed on the rotor for dynamic balance, it is easy to put the iron filings generated during dynamic balance into the joint bearing, so it is necessary to perform dynamic balance before installing the bearing. In order to facilitate assembly, some manufacturers apply some oil or grease in the bearing chamber for lubrication effect during assembly, but it is often difficult for operators to control the amount. What should be paid attention to to to prevent IKO joint bearing failure
If more oil or grease is accumulated in the bearing chamber, it is easy to enter the bearing along the shaft when the bearing rotates. The bearing shall not be coated with oil or grease. If it must be coated, it shall be controlled and there shall be no accumulation in the bearing chamber.What should be paid attention to to to prevent IKO joint bearing failure
The metallurgical quality of joint bearing materials was once the main factor affecting the early failure of rolling bearings. With the progress of Metallurgical Technology (such as vacuum degassing of bearing steel), the quality of raw materials has been improved. What should be paid attention to to to prevent IKO joint bearing failure
The proportion of raw material quality factor in IKO bearing failure analysis has decreased significantly, but it is still one of the main influencing factors of bearing failure. Proper material selection is still a factor that must be considered in bearing failure analysis.
The main task of joint bearing failure analysis is to find out the main factors causing bearing failure according to a large number of background materials, analysis data and failure forms, so as to put forward targeted improvement measures, prolong the service life of the bearing and avoid sudden early failure of IKO bearing.What should be paid attention to to to prevent IKO joint bearing failure
The limit speed of INA Bearing when grease lubrication and oil lubrication (oil bath lubrication) are respectively contained in the size table of each bearing, and its value represents the limit value of speed when the bearing of standard design rotates under general load conditions (C / P / ≥ 13, FA / FR ≤ about 0.25). In addition, bearing lubricant may be superior to other properties according to its type and brand, but it is not suitable for high-speed rotation.What should be paid attention to to to prevent IKO joint bearing failure
When the load condition C / P < 13 (i.e. the equivalent dynamic load p exceeds about 8% of the basic rated dynamic load C), or the axial load in the synthetic load exceeds 25% of the radial load, the formula shall be used to correct the limit speed.What should be paid attention to to to prevent IKO joint bearing failure
The speed of the bearing is mainly limited by the temperature rise caused by friction heating inside the INA Bearing, but when the speed exceeds a certain limit, the high-temperature bearing will not continue to rotate due to burns, etc.What should be paid attention to to to prevent IKO joint bearing failure
Precautions for measuring bearing radial clearance:What should be paid attention to to to prevent IKO joint bearing failure
Special instrument measurement method shall be adopted as far as possible;
Using the hand push method requires the surveyor to have high measurement skills. The measurement error of this method is large, especially when the clearance is in the edge state, it is easy to cause error. At this time, the instrument measurement should prevail;What should be paid attention to to to prevent IKO joint bearing failure
When measuring with a feeler gauge, it shall be operated according to the provisions of the standard, and the method of rolling the roller from the feeler gauge is not allowed;What should be paid attention to to to prevent IKO joint bearing failure
During the measurement, ensure that the ball falls into the ditch bottom; The closed bearing shall be measured before sealing; When using a loaded instrument, the measured value shall also subtract the increase of clearance caused by load.
For multi row bearings, the clearance of each row is required to be qualified, and the arithmetic mean of the clearance of each row is taken as the radial clearance of high-temperature bearings.What should be paid attention to to to prevent IKO joint bearing failure
The limit speed of INA Bearing refers to the limit value of the speed that can rotate continuously without friction heating causing burns.
Therefore, the limit speed of high-temperature bearing depends on the type, size and accuracy of bearing, lubrication mode, quality and quantity of lubricant, material and type of cage, load conditions and other factors.What should be paid attention to to to prevent IKO joint bearing failure
It is hoped that the IKO bearing package will be opened just before installation. General grease lubrication, do not clean, directly fill with grease. For lubrication with lubricating oil, it is not necessary to clean in general. However, IKO bearings for instrument or high-speed use should be cleaned with clean oil to remove the rust inhibitor coated on IKO bearings. The rust of the bearing can’t be removed despite the rust inhibitor IKO. Moreover, IKO bearings sealed with grease can be used directly without cleaning.
The installation method of IKO bearing varies according to the structure, fit and conditions of IKO bearing. Generally, the inner ring needs interference fit because it is mostly shaft rotation. IKO bearing with cylindrical hole is pressed in by press or hot assembly method. In the case of taper hole, it can be directly installed on the taper shaft or installed with sleeve.
When it is installed into the shell, there are usually many clearance fits, and the outer ring has interference. It is usually pressed in with a press, or there is a cold shrinkage fit method for installation after cooling.
When dry ice is used as coolant and cold shrinkage is used for installation, the moisture in the air will condense on the surface of IKO bearing. Therefore, appropriate anti rust measures are needed.
Although the quality of IKO bearing is relatively good, the rolling bearing is a precision component, and its use must be carried out carefully accordingly. No matter how high-performance IKO bearings are used, if they are not used properly, they will not get the expected high performance.