4results about How to "Achieve stiffness" patented technology

The present application belongs to the technical field of flexible body aircraft, and particularly relates to a large-aspect-ratio heavy-load lightweight wing bending and torsional stiffness measuring platform. The measuring platform comprises a variable-roots wing clamping table, a telescopic heavy-load support frame, a lifting heavy-load beam, a pre-tightening force regulator, an integrated infusion loading device, a data monitoring terminal and a displacement meter. The lifting heavy-load beam is located directly above the variable-roots wing clamping table and spans the two heavy-load telescopic vertical beams of the telescopic heavy-load support frame. The pre-tightening force regulator is connected to the lifting heavy-load beam and the heavy-load flexible lightweight wing test piece through a pull rope at both ends. The data monitoring terminal is used to monitor and record the displacement and tension data of different measuring points of the lightweight wing test piece. The integrated infusion loading device can accurately control the different loads at different positions of the lightweight wing test piece, and realize the equivalent fine loading of the aerodynamic distributed load of different regions of the heavy-load flexible lightweight wing test piece under different working conditions, thereby greatly improving the loading accuracy.

This invention discloses a repeatable locking mechanism based on disc spring unstable switching, including a support housing, a spindle, a motor assembly, a screw, a slider, a nut slider, a conical coil spring, a disc spring, and a self-locking mechanism. The invention also discloses a method for operating the above-mentioned repeatable locking mechanism, including: the motor assembly driving the spindle to rotate; the slider moving to a first driving position engaging with the upper screw, the spindle driving the upper screw to rotate via the slider; the upper screw driving the upper nut slider to move up and down, locking or unlocking the self-locking mechanism A; the upper screw driving the upper nut slider to continue moving downwards, after the conical coil spring undergoes torsional deformation, the nut slider pushes the slider downwards, causing the slider to move to a second driving position engaging with the lower screw, the spindle driving the lower screw to rotate via the slider. This invention enables selective locking and further improves the stiffness of the flexible arm.

This invention relates to the field of refrigeration equipment compressor technology, specifically disclosing a composite vibration damping device for compressors. The device includes an outer constraint unit and an inner energy-absorbing unit, with the inner energy-absorbing unit placed within the outer constraint unit and not connected to it. The inner energy-absorbing unit includes a first support plate, a second support plate, and a torsion assembly. The first and second support plates are arranged vertically, and the torsion assembly is positioned between and connected to both the first and second support plates. This composite vibration damping device for compressors solves the problem that current compressor vibration damping structures struggle to simultaneously meet the contradictory requirements of achieving low stiffness and high vibration isolation during compressor operation, and high stiffness and strong constraint when the compressor is subjected to external impacts.

The application provides a composite retaining wall and a construction method thereof, and the composite retaining wall comprises a cantilever module, a gravity module and a drainage system, the cantilever module is a fabricated retaining wall, is assembled by using dense rib prefabricated plates, is embedded at the bottom of a cast-in-place foundation, and the cast-in-place foundation is poured at one time; the gravity module is formed by pouring solidified soil in layers, is a semi-rigid body, and is filled between the cantilever module and a slope surface; the drainage system comprises a drainage mat and a rigid waterproof board, the drainage mat is laid between the slope surface and the gravity module, the rigid waterproof board is vertically arranged between a slope foot and the cast-in-place foundation, the lower part is located below the bottom elevation of the cast-in-place foundation, and the upper part is located in a solidified soil pouring area. The cantilever module and the gravity module of the retaining wall are mutually engaged to form a space-embedded resistance system, have good supporting performance, and have the advantages of a cantilever retaining wall, a downward-inclined retaining wall and an upward-inclined retaining wall; and the drainage system has good water interception and drainage functions.