One of the transmission components often used in precision mobile units is often used by the precision mobile unit. Due to the small friction loss of the roller screw, its transmission efficiency can reach 90%to 98%of about 2 to 3 times the efficiency of the sliding rotation mechanism. In the drum screwdr, when the screw and the nut have a relative motion of the axial load, the roller is in contact with the screw roller and the nut roller surface, respectively. At present, there are two types of roller -type noodles: single arc and double arc types in China. There are four contact areas of the double arc roller screws, and there are two in the secondary arc rolty bead screws. In contact area. With the different stress and direction of the rolling beads in the contact area, the movement of the roller is also different, mainly rolling, rotating, sliding movement, etc.
The friction of the roller screw side contains rolling friction and sliding friction, but the mechanism of friction is more complicated, which is the result of a comprehensive effect of various factors. It is not only related to the structural size, geometric accuracy, materials and thermal treatment performance of the screw itself, but also related to the workload, assembly accuracy, adjustment pre -tightening method, reverse selection, lubrication conditions and environmental parameters. The friction of the roller screwdr is mainly from the following aspects: the pure rolling friction caused by the elastic lag of material; the friction caused by the poor slide on the rolling contact surface; Caused friction; pure sliding friction of sliding contact site; sticky friction of lubricant.
When the roller moves along the spiral surface, the movement trajectory of the center of the ball is the spiral line of the center of the ball. When the two methods are equal, the screw and the nut are still static. When the ball movement, due to the two method -oriented effects, the two frictions can be decomposed into the two friction points of the rolling ball rolling (the direction of the center of the ball), and the two points that make the droplets slip. Under the decoction of friction, the roller beads have a slippery movement in the roller plane. On the other hand, the side sliding direction of the roller changes with the rotation direction of the rotation of the rotation. When the screw transitions the opposite of the nuts of the nut and the axial load, the roller slides towards the side of the nut. The side of the bar is slippery. Due to the complexity of the drums in the roller screwdr, studying the movement of the exercise and slippery characteristics of the roller in the spiral transmission is the difficulty and foundation of the drum screw adheromatology and design analysis.
Analysis of Rolling Silk Bar Dynamics
One of the transmission components often used in precision mobile units is often used by the precision mobile unit. Due to the small friction loss of the roller screw, its transmission efficiency can reach 90%to 98%of about 2 to 3 times the efficiency of the sliding rotation mechanism. In the drum screwdr, when the screw and the nut have a relative motion of the axial load, the roller is in contact with the screw roller and the nut roller surface, respectively. At present, there are two types of roller -type noodles: single arc and double arc types in China. There are four contact areas of the double arc roller screws, and there are two in the secondary arc rolty bead screws. In contact area. With the different stress and direction of the rolling beads in the contact area, the movement of the roller is also different, mainly rolling, rotating, sliding movement, etc.
The friction of the roller screw side contains rolling friction and sliding friction, but the mechanism of friction is more complicated, which is the result of a comprehensive effect of various factors. It is not only related to the structural size, geometric accuracy, materials and thermal treatment performance of the screw itself, but also related to the workload, assembly accuracy, adjustment pre -tightening method, reverse selection, lubrication conditions and environmental parameters. The friction of the roller screwdr is mainly from the following aspects: the pure rolling friction caused by the elastic lag of material; the friction caused by the poor slide on the rolling contact surface; Caused friction; pure sliding friction of sliding contact site; sticky friction of lubricant.
When the roller moves along the spiral surface, the movement trajectory of the center of the ball is the spiral line of the center of the ball. When the two methods are equal, the screw and the nut are still static. When the ball movement, due to the two method -oriented effects, the two frictions can be decomposed into the two friction points of the rolling ball rolling (the direction of the center of the ball), and the two points that make the droplets slip. Under the decoction of friction, the roller beads have a slippery movement in the roller plane. On the other hand, the side sliding direction of the roller changes with the rotation direction of the rotation of the rotation. When the screw transitions the opposite of the nuts of the nut and the axial load, the roller slides towards the side of the nut. The side of the bar is slippery. Due to the complexity of the drums in the roller screwdr, studying the movement of the exercise and slippery characteristics of the roller in the spiral transmission is the difficulty and foundation of the drum screw adheromatology and design analysis.
