3results about How to "Anti-loose effect" patented technology

This utility model discloses a turbine top cover for visual monitoring, relating to the technical field of turbine top cover structure. The turbine top cover for visual monitoring includes a sealing cover plate, an anti-impact locking assembly, a cover body mounted on the turbine casing, and a transparent cover. An observation hole is provided on the cover body, and the transparent cover is fixedly mounted within the observation hole. The sealing cover plate includes an outer edge and a pressure-resistant part. The outer edge is located on the outer side wall of the cover body. The pressure-resistant part is located within the observation hole and connected to the outer edge. The pressure-resistant part abuts against the transparent cover. A first bolt is provided between the outer edge and the cover body, fixing the outer edge and the cover body together. The anti-impact locking assembly includes a pressure plate with a first limiting groove, into which the nut of the first bolt can extend. This utility model can effectively improve the water pressure resistance of the transparent cover on the turbine top cover, effectively preventing water pressure damage and leakage.

The utility model discloses a main and auxiliary frame connecting assembly and a main and auxiliary frame connecting structure, and belongs to the technical field of dumper parts. The main and auxiliary frame connecting assembly comprises an upper tensioning frame and a lower tensioning frame, the upper tensioning frame is used for being connected with an auxiliary frame longitudinal beam, the lower tensioning frame is used for being connected with a main frame longitudinal beam, the upper tensioning frame and the lower tensioning frame are connected through a second bolt pair, and a base plate is arranged between the upper tensioning frame and the lower tensioning frame. A gap between the upper tensioning frame and the lower tensioning frame can be eliminated through the base plate, the anti-loosening effect is achieved, the precision requirement for installation and positioning of the upper tensioning frame and the lower tensioning frame is lowered, the second bolt pair is sleeved with the sleeve, the sleeve is located between the head of a bolt of the second bolt pair and the upper tensioning frame, the threaded section of the bolt is only used for being connected with the lower tensioning frame, and therefore the anti-loosening effect is achieved. And the bolt bar in the area where the sleeve is located only bears axial force, so that the stress efficiency and reliability of the bolt are improved, and the bolt is not easy to break when being lengthened.

The utility model relates to a non - equal thick double support plate wheel hub for axial flow fan, the utility model discloses the structure of upper support plate and lower support plate cooperate upper and lower clamp is used to fix fan blade, forms the mounting structure of closure, and the annular package of blade pulp root is carried out, improves the reliability of installation, and the upper support plate of relatively thick guarantees the strength of overall structure, and the lower support plate is used as the auxiliary support to blade, can effectively promote overall rigidity, through reducing the thickness of lower support plate and opening the hole in the center, can effectively reduce the weight of overall structure while guaranteeing the structural strength. The upper and lower clamp structure cooperation two sides set up the double -end fastening bolt and carry out the clamping fixation fan blade, guarantee structural connection stable, improve the operation safety of fan. And through the stop washer and be connected fixed between the double -end fastening bolt, and through setting the notch on the stop washer, through bending can make it be covered on the nut, play the effect of anti - loosening, guarantee the connection stability of double -end fastening bolt.