Ball Bearing Action? What Is The Principle?
With the development of science and technology, ball bearings have been rapidly promoted and applied. In recent years, with the continuous advancement of technology, the types of ball bearings emerge in an endless stream and have been widely used in many fields. Please follow the editor to understand the working principle of ball bearings. What do ball bearings do?
Ball bearing principle
A ball bearing is a type of rolling bearing. Spherical alloy steel balls are installed between the inner steel ring and the outer steel ring to reduce friction during power transmission and improve the efficiency of mechanical power transmission. Ball bearings cannot withstand large heavy loads and are common in light industrial machinery. Ball bearings are also called ball bearings.
Talk about how ball bearings work.
Ball bearings mainly include four basic components: ball, inner ring, outer ring and cage.
Compared with balls and rings, the cage has a lower hardness, and its materials include metals (such as medium carbon steel. Aluminum alloys) or non-metals (such as Teflon. PTEF. Polymer materials). The rotational friction resistance of rolling bearings is smaller than that of journal bearings, so at the same speed, the temperature generated by friction is lower.
Ball bearings are generally used in low-load mechanical transmission equipment. Due to the small bearing area of ball bearings, serious mechanical damage is prone to occur during high-speed operation. Therefore, needle roller bearings are often used in heavy-duty mechanical transmission to increase the bearing surface, improve mechanical transmission efficiency, and reduce mechanical damage.
The ball bearing changes the friction mode of the bearing and adopts rolling friction, which more effectively reduces the friction between the bearing surfaces, prolongs the service life of the fan bearing and prolongs the service life of the radiator. The disadvantage is that the process is more complicated, the cost increases, and the working noise is higher.
What is the function of ball bearing?
1. According to the national standard GB/T17587.3-1998 and application examples, ball bearings (which have basically replaced trapezoidal screws, commonly known as screws) are used to convert rotary motion into linear motion; or an actuator that converts linear motion into rotary motion , has the advantages of high transmission efficiency and accurate positioning.
2. When the ball bearing is used as the active body, the nut will be converted into linear motion with the rotation angle of the screw according to the lead of the corresponding specification, and the passive workpiece can be connected with the nut through the nut seat to realize the corresponding linear motion.
Features of ball bearings:
Compared with the sliding screw pair, the driving torque is 1/3.
There are many balls rolling between the screw shaft and the nut of the ball screw, so higher motion efficiency can be obtained. Compared with the past sliding screw pair, the driving torque is less than 1/3, that is, the power required to achieve the same motion result is 1/3 of the rolling screw pair. Great for saving power.
Second, to ensure high precision.
Ball screws are continuously produced by the world's highest level machinery and equipment made in Japan, especially in terms of research, assembly and inspection of the factory environment, with strict control of temperature and humidity. Due to the perfect quality management system, the accuracy is fully guaranteed.
Third, the possibility of micro-feeding.
Because the ball screw adopts ball motion, the starting torque is extremely small, and there will be no creeping phenomenon such as sliding, which can ensure accurate micro-feeding.
Fourth, no backlash. High rigidity.
The ball screw can be pressurized, because the pressurization can make the axial clearance reach a negative value, thereby obtaining higher rigidity (ball bearing pressurizes the balls, when actually used in mechanical devices, the repulsion of the balls can enhance the rigidity of the nut ).
5. Possibility of high-speed feed.
Due to the high movement efficiency and low heat generation, the ball screw can achieve high-speed feed (movement).
◎Accuracy tolerance: C10.C7.C5.C3.C2.C1 - the smaller the number, the higher the accuracy.
◎The world's major ball screw manufacturers:
Taiwan ZTPM is climbing ball screw, Taiwan Shangyin hiwin ball screw, Taiwan ABBA ball screw, Taiwan PMI ball screw, China Dongguan Hanyi ball screw, Korea SBC ball screw, Japan THK ball screw, Japan NSK Ball screw, German STAR ball screw, etc.
Ultra-high DN value ball bearings: high-speed machine tools, high-speed comprehensive machining centers;
End cover ball bearings: rapid handling systems, general industrial machinery, automated machinery;
High-speed ball bearings: CNC machinery, precision tool machinery, industrial machinery, electronic machinery, high-speed machinery;
Precision ground ball bearings: CNC machinery, precision tool machines, industrial machinery, electronic machinery, conveying machinery, aerospace industry, actuators for other antennas, valve switching devices, etc.
Nut Rotation (R1) Series Ball Bearings: Semiconductor machinery, industrial robots, woodworking machines, laser processing machines, handling devices, etc.
Rolled-grade ball bearings: low friction, smooth operation, fast delivery and low price;
Heavy-duty ball bearings: all-electric injection molding machines, punching machines, semiconductor manufacturing equipment, heavy-duty brakes, industrial machinery, forging machinery.