40results about How to "Improve local stress" patented technology

A turbine bucket airfoil has a conical fillet about the intersection of the airfoil tip and tip shroud having a nominal profile in accordance with coordinate values of X and Y, offset 1, offset 2 and Rho set forth in Table I. The shape parameters of offset 1, offset 2 and Rho define the configuration of the fillet at the specified X and Y locations about the fillet to provide a fillet configuration accommodating high localized stresses. The fillet shape may be parabolic, elliptical or hyperbolic as a function of the value of the shape parameter ratio of D1D1+D2at each X, Y location where Dl is a distance between an intermediate point along a chord between edge points determined by offsets O2 and O2 and a shoulder point on the fillet surface and D2 is a distance between the shoulder point and an apex location at the intersection of the airfoil tip and tip shroud.

The invention relates to a leaf spring and a manufacturing technology thereof. The leaf spring comprises a leaf middle section, a transition section, a variable-section section and a winding lug installing section, and all the sections are the same in width. The material of the leaf spring is an FRP composite material. The manufacturing technology comprises the fiber cloth weaving procedure, the fiber cloth laminating procedure, the laminated layer spot welding procedure, the pre-forming procedure, the cutting procedure, the HP-RTM procedure, the unloading and shaping procedure and the post-machining procedure. The technical scheme solves the problems of design and process of leaf spring leaves in the prior art, the leaf spring leaf performance is improved, the volume production beat is fast, and the market value of the leaf spring is huge; one leaf spring can be independently used, two leaf springs can be combined to form a main and auxiliary spring structure, different loads are achieved, and all steel plate spring structures can be replaced by changing structures of winding lugs and other accessories; complete fracture at a time is avoided, the active failure mode is achieved, and the vehicle running safety is sufficiently guaranteed; the weight of a leaf spring suspension is reduced, the dynamic stiffness is very small, the vehicle running smoothness is improved, and fuel affinity is improved as well; and the service life is 5 or more times of the steel plate springs, and the cost of using the leaf spring by users is greatly reduced.

The invention discloses a polycarbonate (PC) composite bridge with corrugated steel webs and a construction method for the PC composite bridge. The PC composite bridge comprises a concrete top plate, a concrete bottom plate and two double-corrugated steel webs; the bottom surface of the concrete top plate and the concrete bottom plate are provided with upper and lower profiled steel sheets; each double-corrugated steel web comprises two layers of corrugated steel plates and a plurality of connecting pieces; concrete is filled between the two layers of corrugated steel plates; the connecting pieces are connected between the two layers of corrugated steel plates, so that the two corrugated steel plates work together and the aim of greatly improving bending rigidity and torsional rigidity is fulfilled; the upper ends of the double-corrugated steel webs are connected with steel top plates connected with the upper profiled steel plate; and the lower ends of the double-corrugated steel webs are connected with steel bottom plates connected with the lower profiled steel plate. The double-corrugated steel webs are integral, the bending rigidity and torsional rigidity are improved by more than 4 times, the stability is high during construction, and the application range of the bridge is widened; and the profiled steel plates are adopted, so that formwork supports for the concrete top plate and the concrete bottom plate are eliminated during construction, construction without formworks and with a few supports is realized, the cost is reduced and the construction period is shortened.