In The Same Working Conditions Of The Same Type Of Rolling Bearing, Usually The Larger The Size, The Longer Its Life.
A:In the same type of rolling bearing under the same working conditions, the larger the size is, the longer the life is, is right, according to the pressure theorem, the smaller the contact surface is, the greater the pressure (pressure) is (such as jack), similarly, the small rolling bearing inside and outside the longitude is very small, the ball direct longitude is small, and the bearing inside and outside the contact surface is small, the greater the force it bears, It and the bearing inside and outside the friction force is also large; Large rolling bearing inside and outside by the increase, the ball by the increase and the number of direct, and the bearing inside and outside by the contact surface will increase, the ball to bear the force is reduced, it and the bearing inside and outside by the friction force is small, so high-power equipment with large bearings.
The sealing cover of deep groove ball bearing is mainly used to prevent the intrusion of external foreign bodies (solid foreign bodies, liquid foreign bodies) and prevent the loss of bearing lubricant. There are two sealing forms of bearing seal cover:
1. Non-contact sealing cover (sealing cover and inner ring are not in contact), including stamped steel seal cover (iron seal) and non-contact rubber seal cover.
Advantages: dust proof, relatively high speed, metal seal cover relatively low mute effect, relatively low price.
Disadvantages: There is no protection against liquid foreign bodies.
2.Contact sealing cover (sealing cover and bearing inner ring with a single lip or more lip contact), including contact rubber sealing cover and labyrinth type contact sealing cover.
Advantages: dust proof, liquid foreign body prevention, high mute effect.
Disadvantages: slightly lower speed, slightly higher price.
Therefore, there is no difference between good and bad deep groove ball bearing sealing cover, only the difference between suitable. For example: in a clean environment, it is unnecessary to use contact rubber sealing cover, which will only increase the additional cost of the manufacturer.
To sum up, the sealing type of deep groove ball bearing is not good or bad. The main consideration is where the bearing is used and the environmental factors of the bearing need to be considered. The structure of the sealing ring is different, the material is different, and the friction coefficient is different.
