3results about How to "Reduce stress value" patented technology

This utility model discloses a support structure for lifting and lowering a trailer tailgate, relating to the field of trailer tailgate connection technology. The structure includes a support frame, a diagonal brace, a support arm, a hydraulic cylinder, and a force-distributing plate. The diagonal brace is fixed to the support frame. Mounting seat a (including mounting plate a) and mounting seat b (including mounting plate b) are mounted on the support frame. The support arm and the hydraulic cylinder are connected at both ends to the mounting seats and the trailer tailgate, respectively. The force-distributing plate connects the mounting seats and the diagonal brace. By distributing load through multi-path force transmission, it improves structural strength and stability, avoids hydraulic cylinder axis misalignment, extends service life, and ensures safe and efficient tailgate lifting and lowering.

The invention belongs to the technical field of drill rod threads, and particularly relates to a drill rod thread capable of improving bearing capacity distribution in the thread tooth generatrix direction and a drill rod thereof.The drill rod thread comprises an external thread connector and an internal thread connector, and the external thread connector comprises an external thread connector body; one end of the external thread joint main body is connected with a drill rod, and the other end of the external thread joint main body is sequentially provided with an external thread joint main shoulder surface, an external thread joint taper pipe thread and an external thread joint auxiliary shoulder surface which are matched with the internal thread joint; and a main shoulder root groove is formed between the main shoulder surface of the external thread joint and the taper pipe thread of the external thread joint. The circular bead structure is changed into the main shoulder root groove, and the maximum stress value point of the external thread is transferred to the main shoulder root from the first ring tooth root at the thread connection part, so that the stress value of the main shoulder side root of the external thread can be effectively reduced, the stress concentration is reduced, and the service life of the thread tooth is prolonged.

This utility model discloses a submersible axial flow pump inlet horn that combines bottom-coupled installation and cavitation resistance, relating to the field of submersible axial flow pump improvement. It includes an inlet horn with an expanded hollow cylinder, flanges at both ends, and stainless steel wear-resistant rings fitted to the inner wall, the length of which covers the impeller blades. The mounting flange is fixed to the guide vane body with a stepped annular protrusion, and an even number of reinforcing ribs are provided between the flanges. A vertical protrusion is provided on the outer side of the inlet end. During operation, the horn-shaped structure guides the water flow smoothly in, the wear-resistant rings resist cavitation, and the reinforcing ribs and protrusions enhance the installation rigidity and stability, achieving efficient axial propulsion of the water flow. Compared with existing technologies, this design shortens installation and disassembly time, reduces stress values, reduces noise by 10-15 decibels, is compatible with multiple pump models, and reduces carbon emissions, combining installation convenience with environmental and energy-saving advantages.