Working principle and application of one-way clutch bearing 2018-09-24 15:07:51

Working principle and application of one-way clutch bearing

The one-way clutch bearing unit is generally composed of a ball bearing and a wedge type one-way clutch. The ball bearing is subjected to radial force and the wedge is subjected to
Torque, combined to achieve one-way rotation, swing indexing, and forward and reverse, due to its compact structure, reliable wedge and transmission
The advantages of large torque, etc., can meet the needs of functionalization, componentization and small assembly space of the mainframe, and have been obtained in various fields of the national economy.
A wide range of applications.

The special-shaped wedges are evenly distributed on the circumference of the cage, and the shaped wedges are always kept inside and outside under the action of the strip spring force.
Circle contact. Since the maximum height of the shaped wedge is greater than half of the difference between the outer diameter of the outer ring and the outer diameter of the inner ring, it is in the inner and outer ring working faces.
Often tilted. When the outer ring rotates clockwise, the outer ring and the shaped wedge contact surface generate friction, for each shaped wedge
The center produces a tilting moment to the right, and the inner and outer rings are in strong engagement with each other to achieve the transmission of torque.

When the outer ring rotates counterclockwise, the center of each shaped wedge is tilted to the left, and the inner and outer rings are unwound to achieve the outer ring idling.
Photographs of the formation of the bearing bubble and the collapse of the high-speed camera can be seen: Fluid dynamic pressure bearing hollow bubble
It is objective. Theoretically, the location of the cavitation is at the divergent oil wedge of the bearing. Since the bubble formation to the collapse time is very short, the impact force at the time of collapse is theoretically roughly calculated.
quite big . Therefore, the cavitation of the bearing surface of the sliding bearing also occurs at the diverging oil wedge. From the analysis of cavitation mechanism we believe that the main
It is because the bubble collapses to generate an impact force to destroy the oil film on the surface of the bearing pad, thereby creating conditions for chemical corrosion, thereby making the bearing table
The face pit is enlarged; this is different from the "oil wedge" failure mechanism. In order to reduce the effect of cavitation, it is advantageous to use a harder surface material.
of. If the hardness is reasonable, further experiments are needed. According to the data, molybdenum-copper alloy has strong resistance to cavitation; bronze and yellow
Copper alloys have poor cavitation resistance; if they are on steel bearing pads. Apply a layer of synthetic material to make it have low damping and high conductivity.
The performance against cavitation may be better. In addition, the use of tilting bushings can reduce the effects of cavitation. Also used to improve the quality of the lubricant
The amount, the impurities in the oil and the composition of water and air, thereby reducing the number of gas cores, is also advantageous for bearing anti-cavitation.