How is the normal operating temperature of the sliding bearing bush determined?
Shaft vibration and shaft temperature are the two main parameters that reflect the bearing state, so it should be analyzed from the two aspects.1.1 axis vibration if the unit has the following problem: A. magnetic force line misalignment, appears to exceed the standard deviation of gap; B. motor interturn short circuit, load imbalance; C. turbine rotor unbalance or vibration; D. installation is found, the ultra poor bearing ultra poor gap, the connection is not good. All these problems will lead to higher vibration value of bearings, but the difference is that the severity is not the same.The axial vibration is affected more directly and the data is more intuitive and accurate, so it can be monitored, analyzed and judged in real time. Generally, we adopt the method of setting upper limit axial vibration value and standard axial vibration value, and within the two value range, all belong to the normal operation category. Run 1.2 axle temperature units in addition to the above problems, but also has the following problems: A. may appear tungsten bearing hanging layer defects; B. lubricating oil and lubricating the surface problems; problems of C. oil and cooling system.
By rubbing test, simulation test can accurately know the normal working temperature,The ultimate temperature is generally based on the temperature limit of the product material, which is generally worse than the theoretical one.Sliding bearings (sliding, bearing) bearings that work under sliding friction. Plain bearings work smoothly, reliably and without noise. Under the condition of liquid lubrication, the sliding surface is separated by the lubricant without direct contact, and the friction loss and surface wear can be greatly reduced. The oil film also has a certain vibration absorption capacity. But the starting friction resistance is larger. The shaft supported by the bearing is called the journal, and the part that matches the journal is called the bush. In order to improve the friction properties of the bearing surface, the antifriction material layer, which is cast on its inner surface, is called the bearing lining. Bearing and bearing lining materials are collectively referred to as journal bearing materials. The application of sliding bearings is usually under the condition of high speed and light load.
By rubbing test, simulation test can accurately know the normal working temperature, the temperature limit according to the general material temperature limit, the general theory and practical than the poor.
