| Home>Bearing knowledge>Ceramic materials are used in bearing production occupation |
Ceramic materials used in bearing manufacturing
Source: China Bearing Network Time: 2013-04-11
| /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; |
Silicon nitride ceramic bearings are mainly used in four aspects: 1, high-speed bearings, 2, high-temperature bearings, 3, vacuum bearings; 4, corrosion bearings. The reason why silicon nitride ceramic bearings can work in special circumstances and conditions; Thanks to the function of silicon nitride ceramics. Silicon nitride ceramics make ceramic bearings have the following advantages:
1. The component of high-speed ceramic data is only 40% of the equal steel component; the density is small; the lightweight and high-speed bearing can be completed; the ceramic bearing can be rotated at high speed to reduce the rolling load caused by the centrifugal force effect. Adding and slipping; the rotational speed of ceramic bearings is 1.3 to 1.5 times that of steel bearings; its DN value can reach 3 million; for example, angular touch ball bearings; because of its certain touch angle; its rolling body and raceway surface Rotational sliding occurs between the two; when the ceramic tumbling body with a small density is selected; not only the rotary sliding. The leaf catastrophe crab (4) group æ…ç »å« é¹• 鸬 鸬 娴淖饔茫 娴淖饔茫 娴淖饔茫 娴淖饔茫 娴淖饔茫 诤 诤 诤 蘸 蘸 蘸 衅饕 衅饕 衅饕Under the shallow S lucky.
2. The elastic modulus of high-rigidity silicon nitride ceramics is much higher than that of metal; it is 1.5 times of metal; thus, the elastic deformation after being stressed. %~20%; then reduce the oscillation of the machine tool. It has outstanding application value in high-precision system; such as the spindle of ultra-fine machine tool, high-precision aerospace bearing, etc.
3, longevity number because ceramic material dislocation is less; low mobility; and has a high hardness; usually more than twice the hardness of the metal; can reduce wear; make ceramic bearings have good wear resistance. In addition; nitriding The mechanical strength of silicon ceramics is not low; its tensile strength and flexural strength are appropriate with metals, and its compressive strength is extremely high; it is about 5 to 7 times that of metal materials; especially under high temperature conditions; Strength and hardness; even at 1200 ° C, the strength is basically unchanged; in the case of foreign matter mixing; ceramic balls rarely fall off; therefore; ceramic bearings with good indentation resistance usually have a longer life; Usually 3 to 5 times better than steel bearings.
4, low heat because the friction coefficient of silicon nitride ceramic material is more than 30% of the value of the 曜 曜 曜 所以 ; ; ; ; ; ; ; ; ; 曜 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢 岢Compared with the singer.
5, the low thermal expansion of silicon nitride ceramics thermal expansion coefficient is about 20% of the bearing steel; thus the ceramic bearing changes with the temperature of the scale changes. Also Na is still åœ æ·® 苊饬 苊饬 苊饬 å—Ÿ å—Ÿ 攘 攘 攘 攘 奂Good @桶涫 挥 挥 å¬—è° è°– å¬—è° è°– å¬—è° è°– å¬—è° è°– æµ èŸ® æµ èŸ® 肪 肪 肪 肪 肪 肪 肪
6, corrosion resistance ceramic material is not vivid chemical characteristics; make ceramic bearings have a certain corrosion resistance; therefore; ceramic bearings can be used for steel bearings because of lack of chemical resistance and early failure of all applications; such as chemical machinery , food, marine and other parts of the use of machinery and the use of atomic energy equipment.
7. Non-magnetic in a strong magnetic environment; when using steel bearings; the micro-powder worn from the bearing itself is adsorbed between the rolling body and the raceway surface; it becomes the primary cause of early bearing loss and noise increase; The bearing is completely non-magnetic; and has a normal bearing capacity; so it can be used in applications where a completely non-magnetic bearing is required.
8. The insulation resistance of the insulating ceramic material is relatively high; it can be used as a good insulation material; the bearing is protected from arc damage.
Totally; the use of ceramic materials to make bearings; can greatly expand the scale of the use of rolling bearings in various categories. At present, many companies in the international countries to discuss, produce, sell ceramic bearings; but mostly for hybrid bearings; that is, the bearing roll is ceramic materials; inside and outside The circle is made of steel. China started late in the discussion of ceramic bearings; the country has included ceramic ball bearing research and development in science and technology projects since the beginning of the Eighth Five-Year Plan; and injected a lot of funds; some research institutes and companies have also made Favorable exploration; has achieved gratifying results; but it is still in the experimental discussion period. The primary reason for influencing the extensive use of ceramic materials in ball bearings is its difficult processing and excessive production cost. Shandong Linyi Degang ball production limited Responsible company scientific research personnel have made great progress in the research of ceramic bearing ball; the processing speed is more than double that of the existing domestic skills; all skill indicators have reached or exceeded the G5 standard requirements. The industrialization of China's ceramic bearings has been completed. The process of commercialization can play a certain driving effect. Of course; the study of ceramic bearings is still at an early stage. ; Their research is far from over; still needs further research in the following areas to explore:
The first is to study the rollover touch function of ceramic bearings under the conditions of wider custom and smoother conditions.
The second is to discuss the layout and cooperation of ceramic bearing related parts; and the reliability and economy of processing,
The third is the non-destructive testing method and damage guessing skills of ceramic bearing related components.
The fourth is to develop the inspection specifications of ceramic bearings.
It is not too far to trust the ceramic bearings to enter the practical period; its application prospects are very broad; even some people have predicted that ceramic bearings will completely replace steel bearings in the future.
Recommend to friends comments close window
| Bearing related knowledge |
| Hydraulic pump bearing fault diagnosis network method to study bearing fatigue life test SKF imported bearing burnout inspection analysis and avoidance method inch tapered roller bearing 580/572 Ball bearing |
This article links to http://
Please indicate the bearing network http://
Previous:The bearing professor teaches you to repair the static pressure of the grinding machine. The next bearing: the use of laser beam appearance modification skills in the bearing
Outdoor Spa
Outdoor Spa,portable spa,outdoor spa bath,round spa
Guangzhou Aijingsi Sanitary Products Co.,Ltd , https://www.hottubdesign.com