The grease used in Koyo bearing must have anti rust effect, and the anti rust agent can not be dissolved in water. The grease shall have Effect Of Koyo Bearing good adhesion and can form an oil film on the steel surface. The grease will soften during machining, resulting in leakage.
During normal operation, grease will be thrown into the bearing from the bearing seat. If the mechanical stability of the grease is not enough, the structure of the soap of the grease will be mechanically disintegrated during operation, resulting in the destruction of the grease and loss of lubrication. If the grease is selected incorrectly,
all measures to prevent the bearing are also futile. It is very important to select a grease whose base oil viscosity can provide sufficient lubrication effect at the working temperature, Viscosity is mainly affected by temperature. It Effect Of Koyo Bearing decreases with the increase of temperature.
When the temperature decreases, it increases. Therefore, the base oil viscosity at operating temperature must be known. Machinery Effect Of Koyo Bearing manufacturers usually specify the use of a certain grease, but most standard greases have a wide range of applications.
In the process of using Koyo bearings, grease is very critical. If deteriorated grease is used, it will not only fail to play its due role, but also damage the bearing.
① Oil flow observation method
Take two measuring cups, one containing the lubricating oil to be checked and the other empty on the table. Lift the measuring cup filled with lubricating oil 30-40 cm away from the table and tilt it, let the Effect Of Koyo Bearing lubricating oil flow slowly into the empty cup, and observe its flow.
The lubricating oil with good quality should flow slender, uniform and continuous. If the oil flow is fast Effect Of Koyo Bearing and slow, sometimes large pieces flow down, The lubricating oil has deteriorated.
Twist the lubricating oil between the thumb and index finger and grind it repeatedly. The better lubricating oil hand feels lubricity, less wear debris and no friction. If it feels a large Effect Of Koyo Bearing friction feeling such as sand particles between the fingers,
it indicates that there are many impurities in the lubricating oil and it can not be used again. It should be replaced with a new lubricating oil.
③ Illumination method
On sunny days, lift up the lubricating oil with a screwdriver at an angle of 45 degrees to the horizontal plane. Observe the condition of oil drops according to the sunlight. In the light, it can be clearly seen that there is no wear debris in the lubricating oil. It can continue to function. If there are too many wear debris, replace the lubricating oil.
④ Oil drop trace method
Take a clean white filter paper and drop several drops of oil on the filter paper. After the lubricating oil leaks, if there is black powder on the Effect Of Koyo Bearing surface and there is a sense of astringency by hand, it indicates that there are many impurities in the lubricating oil.
Good lubricating oil has no powder, and it is dry and smooth by hand and shows yellow traces.
The periodic measurement of bearing temperature can be aided by thermometer, such as digital thermometer, which can accurately measure the temperature of Koyo bearing and display it in ℃ or Fahrenheit. Important bearing Effect Of Koyo Bearing means that when it is damaged,
it will cause equipment shutdown. Therefore, this kind of bearing should be equipped with temperature detector. Under normal circumstances, the bearing will have a natural temperature rise after just lubrication or re lubrication and last for one to two days.
Generally, the bearing with working temperature above 150 ° is called high-temperature bearing. When the working temperature of chromium bearing steel exceeds 150 °, its Effect Of Koyo Bearing hardness will drop sharply and its size is unstable, so that the bearing can not work normally.
Therefore, for the bearing working at 150 ° to 350 ° working temperature, if the ferrule and rolling element are still made of ordinary high carbon chromium bearing steel, special tempering treatment must be carried out for the bearing parts, which should generally be tempered at 50 ° higher than the working temperature.
The bearing steel tempered according to the above requirements can be used normally at working temperature. However, due to the decrease of hardness after tempering, the service life of bearing is reduced.
(1) Clean heat treatment waste water, waste gas, waste salt, dust, noise and electromagnetic radiation from heat treatment production will pollute the environment.
Solving the environmental pollution problem of heat treatment and implementing clean heat treatment (or green heat treatment) is one of the development directions of heat treatment technology in developed countries. In order to reduce the emission of SO2, Co, CO2, dust and cinder,
the use of coal as fuel has been basically eliminated, and the use of heavy oil is becoming less and less. Most of them use light oil, and natural gas is still an ideal fuel. The waste heat utilization of combustion furnace has reached a high level.
The optimization of burner structure and the strict control of air-fuel ratio ensure the reasonable combustion and reduce NOx and CO to a low limit; Using gas carburizing, carbonitriding and vacuum heat treatment technology instead of salt bath treatment to reduce the pollution of waste salt and CN toxic substances to water sources;
Water soluble synthetic quenching oil is used to replace some quenching oil, and biodegradable vegetable oil is used to replace some mineral oil to reduce oil pollution.
(2) Precision heat treatment precision heat treatment has two meanings: on the one hand, according to the use requirements, materials and structural dimensions of parts, it uses physical metallurgy knowledge and advanced computer simulation and detection technology
to optimize process parameters to achieve the required performance or give full play to the potential of materials; On the other hand, the stability of the optimized process is fully guaranteed, and the product quality dispersion is very small (or zero) and the heat treatment distortion is zero.
(3) Scientific production and energy management of energy-saving heat treatment are potential factors for effective utilization of energy. Establishing a professional heat treatment plant to ensure full load production and give full play to the equipment capacity is the choice of scientific management.
In terms of energy structure of heat treatment, primary energy is preferred; Make full use of waste heat and waste heat; Adopt the process with low energy consumption and short cycle to replace the process with long cycle and high energy consumption.
(4) Less and no oxidation heat treatment is from using protective atmosphere heating instead of oxidation atmosphere heating to controllable atmosphere heating with accurate control of carbon potential and nitrogen potential. After heat treatment, the performance of parts is improved, heat treatment defects such as decarburization
and cracks are greatly reduced, and the finishing allowance after heat treatment is reduced, which improves the utilization rate of materials and machining efficiency. Vacuum heating and gas quenching, vacuum or low pressure carburizing,
nitriding, nitrocarburizing and boronizing can significantly improve the quality, reduce distortion and improve the service life. The heat treatment quality control of Koyo bearing parts is strict in the whole machinery industry.