5results about How to "High fatigue limit" patented technology

This application relates to the field of alloy steel technology, specifically disclosing an ultra-high strength cast steel base for a high-speed railway permanent magnet traction motor and its preparation method. The ultra-high strength cast steel base for a high-speed railway permanent magnet traction motor is made from a chemical composition comprising the following weight percentages: C 0.15-0.25%, Si 0.2-0.5%, Mn 1.5-2.5%, Cr 0.5-1.25%, Ni 0.3-0.8%, Mo 0.2-0.5%, Al 0.02-0.06%, V 0.05-0.15%, Ti 0.02-0.08%, Nb 0.01-0.05%, P 0.01-0.02%, S 0.005-0.01%, with the balance being Fe. The ultra-high strength cast steel frame for the high-speed railway permanent magnet traction motor of this application achieves ultra-high strength while maintaining excellent plasticity and toughness and extremely high fatigue limit. This allows designers to use thinner and more optimized frame wall thickness while ensuring safety margin, thereby directly achieving the goal of lightweighting and enabling it to cope with the extreme vibration conditions of high-frequency and high-stress cycles of high-speed railway traction motors.

The utility model relates to a transmission structure of a wet-type rod mill. The transmission structure comprises an output motor, a coupler, a pinion device, a bull gear and a barrel body, flanges are arranged at the two axial ends of the barrel, and the large gear is installed at the axial inner end of the flange on one side. The output motor is a permanent magnet motor and is installed on a motor base on the side of the barrel, the coupler is an elastic pin coupler, an output shaft of the permanent magnet motor is connected with the small gear device through the elastic pin coupler, the small gear device at least comprises a small gear meshed with the large gear, and the small gear is meshed with the large gear. The permanent magnet motor can drive the small gear to rotate to drive the large gear and the barrel to rotate. The permanent magnet motor and the elastic pin coupling are adopted to provide torque to drive the rod mill barrel to rotate, power consumption is remarkably reduced, high-inertia load generated when the rod mill is started is easily overcome, impact load and instantaneous vibration of the rod mill barrel are absorbed through the elastic pin coupling, a motor shaft and a transmission system are protected, and the service life of the rod mill is prolonged. The motor bearing life is prolonged.

The utility model provides an anti-fatigue low-friction high-frequency response miniature spring for a pneumatic assembly, and relates to the technical field of miniature springs, the anti-fatigue low-friction high-frequency response miniature spring comprises a spring and an upper fixing sleeve, the middle of the outer side surface of the spring is tightly wrapped with a middle leather sheath, the left and right parts of the outer side surface of the spring are tightly wrapped with side leather sheaths, and a reinforcing core is arranged in the center in the spring. The upper portion of the spring is sleeved with an upper fixing sleeve, the lower portion of the spring is sleeved with a lower fixing sleeve, the upper fixing sleeve and the lower fixing sleeve are the same in structure, the thickness size of the middle leather sheath is half of that of the side leather sheath, the middle leather sheath and the side leather sheath are made of silicon rubber materials, the reinforcing core is made of beryllium copper alloy materials, and the reinforcing core is made of aluminum alloy materials. And the cross section of the reinforcing core is of a circular structure. Abrasion is reduced in the back-and-forth rebounding process of the spring, the fatigue resistance is quite high, sleeving is safer and more stable, compression and rebounding are safer and more stable, and the spring is not prone to slipping in the compression process, higher in frequency response and durable.

This invention discloses a surface treatment method for titanium alloys. The specific steps are as follows: placing the titanium alloy structural component or thin-walled component in an oxygen atmosphere at 0.5 to 3 times the standard atmospheric pressure, or a mixed atmosphere with an equivalent oxygen concentration, and holding it at 400℃ to 420℃ for 50 to 200 hours, results in an oxide layer with a thickness less than 3 μm and greater than 1 μm on the surface of the titanium alloy sample, and a gradient oxygen-permeable structure forming on the subsurface. The surface treatment process of this invention is simple to operate, highly adaptable, and effective, and can be applied to various complex titanium alloy structural components or thin-walled components.

The utility model relates to the technical field of supporting frames, in particular to an anti-vibration supporting frame for an ultrahigh altitude tower drum. According to the technical scheme, the tower drum supporting frame mainly aims at solving the problems that an existing tower drum supporting frame is not adaptive to extreme working conditions such as strong wind, low temperature and complex vibration in an ultrahigh altitude area due to structural design and material selection, vibration resistance is insufficient, materials are prone to losing efficacy, and the stability of a tower drum is difficult to guarantee. The multiple sets of connecting rings are arranged on the outer side of the inner supporting frame, flange plates are installed on the side faces of the connecting rings, and the flange plates are connected with the tower drum through bolts; the connecting assembly is installed in the inner supporting frame and used for connecting multiple sections of tower barrels; and the buffering mechanism is arranged on the connecting assembly and used for improving the bearing capacity. The supporting frame effectively overcomes the defects of an existing supporting frame under the ultrahigh altitude extreme working condition, guarantees stable operation of the tower drum, reduces safety risks and improves power generation efficiency.