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.

A blade fixing and blade mounting slot arrangement for a gas turbine engine has a mismatch fit along a portion of the length of the blade fixing and slot where contact stress would otherwise be maximal.

A structure for extreme thermal cycling has a support element that supports a vessel primarily by bearing and frictional forces rather than by welds. The support element has a bearing portion that tapers inwardly beneath a knuckle that separates a cylindrical section of the vessel from a sloped lower section. The bearing portion of the support element follows that slope, providing an extended area of contact between the support element and the vessel. An annular section of the support element can be heated and expanded before placing it around the cylindrical section of the vessel to provide pre-stressing. If required, a strap may extend downwardly from the vessel over an upper edge of the support element.

The present disclosure relates to a battery structure for an electric vehicle. The battery structure comprises a battery case for at least one battery module and a protector including a top belt, a bottom belt and a core arranged between and interconnecting the top belt and the bottom belt. The top belt has a wavelike cross section.

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 relates to a fuel injector with a holding body and a nozzle body which are joined together and which accommodate a coupler module which has a coupler body enclosed by a spring sleeve. The spring sleeve is open in a circumferential direction at a seam thereof which extends in the longitudinal direction. Either the wall thickness of the spring sleeve varies in the longitudinal direction, or a width of at least one hole geometry in the sheathing of the spring sleeve varies in the longitudinal direction.

The invention relates to the field of salt field operation machinery, and discloses a movable high-efficiency slag activation machine including a frame; a driving wheel is arranged on the frame; a first crushing mechanism and a second crushing mechanism are arranged on the frame; the first crushing mechanism includes a slag activation rake and a cylinder, and the second crushing mechanism includesa hollow rotating shaft; the rotating shaft is internally provided with rotating blades, through holes are formed in the rotating shaft, and convex teeth are arranged on the rotating shaft; a first cylinder body and a second cylinder body are fixedly connected on the frame, a first one-way valve is arranged between the first cylinder body and the rotating shaft, and a second one-way valve is arranged between the second cylinder body and the rotating shaft; a first one-way gas intake valve is arranged on the first cylinder body, and a first piston is slidingly connected in the first cylinder body; a second one-way gas intake valve is arranged on the second cylinder body, and a second piston is slidingly connected inside the second cylinder body; a piston rod is arranged between the first piston and the second piston and is fixedly connected with a cylinder output rod. By arrangement of the first crushing mechanism and the second crushing mechanism, a crystallizing layer is crushed twice, and the effect and efficiency of salt mining are improved.

A system and methods for weak spot analysis. A mesh shape is preprocessed to approximate an input model for an object. The mesh shape is analyzed with modal analysis to identify weak regions. A method and system for determining weak spots in an object. The method and system uses an optimization problem which is solved to determine a pressure distribution on the object maximizing maximal principal stress by solving a set of optimization problems maximizing stress for each point of the object.

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.