Method for determining parameters of multiple components of planetary roller screw, and planetary roller screw

The invention discloses a method for determining parameters of multiple components of a planetary roller screw. The multiple components at least comprise a screw, a roller and a nut. The parameter determination method comprises the following steps: respectively establishing part coordinate systems for multiple parts, and constructing corresponding spiral curved surface parameter equations; based on the spiral curved surface parameter equation, determining a first objective function used for representing the spiral curved surface contact stress of the contact side between the parts and a second objective function used for representing the thread tooth axial clearance; solving the first objective function and the second objective function, and determining design parameters of the multiple components, at least including thread form half angles and thread tooth thicknesses; wherein the solution of the second objective function is carried out based on the solution result of the first objective function. The parame