4results about How to "Increase limit speed" patented technology

The application discloses a processing method of a bearing with anti-fretting damage, and belongs to the technical field of bearings. The bearing comprises rollers and raceways, and comprises the following steps: 1) the bearing rollers are designed as hollow rollers, and the geometric sizes of the rollers are obtained through three-dimensional simulation optimization of mathematical models and physical models; 2) special surface heat treatment is performed on the rollers, and the smoothness of the roller contact surface is improved through grinding; 3) a sliding parallel liquid film mixed point array liquid film rolling group composite physical model about the working motion of the bearing rollers with oil storage pits and the raceways is established, an optimal physical model and an optimal mathematical model about continuous and stable lubrication of the point array rolling liquid film group about the arrangement of the oil storage pit point array are established, and the arrangement and size of the oil storage pits on the surface of the bearing rollers are optimized; and 4) special surface heat treatment is performed on the raceways of the inner ring and the outer ring of the bearing. The bearing rollers and the bearing raceways are optimized and improved, the anti-fretting damage capacity of the bearing, the limit rotating speed of the bearing and the service life of the bearing are improved.

The invention discloses an elastomer structure for a high-rotating-speed flange type torque sensor rotor and a design method. The elastomer structure comprises a left flange plate, a right flange plate and a middle main body section, wherein the left flange plate and the right flange plate are integrally formed; the middle main body section is located between the two flange plates; the middle main body section is sequentially provided with a strain measuring area, an induction clamping ring mounting area and a rotating speed measuring area along the axial direction; a circle of annular groove is formed in the induction clamping ring installation area, a non-metal induction clamping ring with the inverted-T-shaped section is installed in the annular groove in a matched mode, a concave aluminum alloy pressing ring is arranged on the left side of the induction clamping ring, and the pressing ring and the elastic body are fastened through a bolt to form a concave-convex-concave embedded type fixing structure. Through the structural design of the groove, the contact area of the clamping ring and the elastic body is increased, the limit stress of the clamping ring is effectively reduced, and the clamping ring adapts to the high-rotating-speed working condition.

The application provides an optimization design method of an internal permanent magnet synchronous electric spindle for a high-precision numerical control machine tool, and aims at the problem that a conventional electric spindle structure cannot perform real-time adjustment on axial pre-load and radial external load, and performs optimization design on the electric spindle structure from three aspects of high-speed ceramic ball hybrid bearing material, axial pre-load real-time compensation and radial external load real-time compensation. The application can improve dynamic characteristics of a rotor system and can actively inhibit shafting vibration.

The utility model provides a kind of magnetic suspension rotating machinery, it includes: rotor, first axial bearing, second axial bearing, thrust disc and first sensor, rotor has first shaft section and second shaft section, the outer diameter of first shaft section is less than second shaft section to form first step surface at the joint of two, the iron core of second axial bearing is also formed protruding portion in the direction away from thrust disc by stretching out in the direction away from thrust disc in axial side away from thrust disc, protruding portion is located in the radial outer side of first shaft section, first sensor is set between the outer circumference of first shaft section and the radial inner circumference of protruding portion, and the axial side of first sensor is towards first step surface, to obtain the axial displacement of rotor by detecting the axial displacement of first step surface. According to the utility model, the detection accuracy of magnetic suspension rotor axial displacement can be greatly improved;Effectively solve the problem of low axial displacement detection accuracy of rotor in the magnetic suspension compressor in the prior art, leading to low axial reliability.