4results about How to "Solve stress concentration" patented technology

The application relates to a fan technical field, and provides a fan impeller structure, the impeller structure comprises a central shaft and a blade, further comprises a base plate coaxially arranged with the central shaft, the blade is fixedly connected with the base plate, and the outer end of the blade is bent into a bending part located on the inner side of the base plate; the impeller structure of the application embodiment fixes the blade through the base plate, and the bending part is located on the inner side of the base plate to improve the stability; compared with the prior art, the vibration of the outer end of the blade can be reduced, the stress concentration effect of the blade root can be reduced, and the service life of the blade can be prolonged.

The local stress dispersion structure of the battery box body comprises the battery box body and the hanging lug arranged on the battery box body, the stress dispersion assembly is arranged between the battery box body and the hanging lug, and the stress dispersion assembly can effectively solve the problem of stress concentration generated by welding of the hanging lug and the battery box body. The welding fusion penetration risk is reduced, the vibration resistance of the box body is improved, and the influence of welding spot failure of the battery box body on the air tightness and safety of the battery pack in later use is reduced; the local stress dispersion structure of the battery box body provided by the utility model can effectively solve the problem of stress concentration generated by the welding of the hanging lugs and the battery box body, is beneficial to reducing the welding penetration risk, and improves the vibration resistance of the box body; and the influence of the welding spot failure of the battery box body on the air tightness and safety of the battery pack in later use is reduced.

The curved-swept blade design method comprises the following steps that a blade in the area above the gravity center of a blade tenon rotates around the axis of an engine, the blade in the area from the gravity center of the tenon to 30% of the blade height position rotates around the axis of the engine to the blade back direction, and the blade in the area above the gravity center of the tenon to the blade back direction; and an included angle is formed between the element-level gravity center of the runner hub and the connecting line of the axis of the engine and the gravity center of the blade tenon. The invention further provides a swept-curved blade. According to the method and the swept-curved blade, smooth transition between the root end area and the middle upper part of the blade can be achieved, the problem of stress concentration is avoided, and smooth transition from the end area in the blade runner to the tenon is achieved.

The application discloses a large-diameter gas film dome spherical warehouse dome arrangement structure, which comprises a dome body, a double-ring beam is arranged on the upper portion of the dome body, the warehouse upper building is connected through the double-ring beam, the distribution of force flow is changed, the portion where the lower portion of the double-ring beam and the top warehouse wall of the dome body intersect is a ring beam reinforcing area, and a plurality of ring reinforcing ribs are arranged along the height direction of the ring beam reinforcing area. The application changes the distribution of force flow through the arrangement of the double-ring beam, so that the force is uniformly transmitted to the dome, the ring beam reinforcing area ensures the smooth transmission of stress, and the stress concentration of the local dome is improved, thereby solving the problem of stress concentration in the existing connecting structure for the upper portion of the spherical warehouse dome and the warehouse upper building.