103results about How to "Reduce structural stiffness" patented technology

Aspects of the invention relate to a cooling system for a blade platform that can provide cooling to and reduce stress on the platform. Aspects of the invention relate to including one or more channels in the blade platform such that the channels extend from the trailing edge face of the platform toward, but terminate prior to, the leading edge face of the platform. The channels can be generally oval or oblong in conformation. Extending between the hollow shank and the channels can be a plurality of cooling holes. During engine operation, coolant is supplied to the shank of the blade assembly. Because the pressure at the shank is greater than the pressure at the trailing edge of the platform, coolant flow is induced through the cooling holes and into the channels. After flowing through the channels, the coolant can be dumped at the trailing edge.

The invention provides a nested annular MEMS oscillation gyro with period distribution type concentrated mass blocks. The gyro comprises a nested annular harmonic oscillator with the period distribution type concentrated mass blocks, and an electrode which is arranged inside / outside the nested annular harmonic oscillator; the nested annular harmonic oscillator comprises a nested annular flexible frame, the mass blocks arranged on the nested annular flexible frame, and anchors for fixing the oscillator; the whole harmonic oscillator is fixedly anchored with a base by the anchor on the center of the harmonic oscillator; the nested annular flexible frame comprises nested rings and spoke-shaped supporting beams; the mass blocks can be additionally arranged on the nested annular flexible frame in a plurality of kinds of manners; and the electrode can be arranged inside / outside the harmonic oscillator, or the electrodes are arranged inside and outside the harmonic oscillator. The gyro has the relatively high thermo-elastic property Q value, relatively large resonance oscillation mass, and relatively large driving amplitude; and as the design of the internal electrode is adopted or the design of the internal and external electrodes is adopted, the gyro also has the advantages that the capacitance detection area is large, the number of detection and control electrodes is large and the like.

The invention discloses a foldable cable bar structural unit based on hexagonal geometry. The structural unit is composed of six hinging nodes, one pivoting node, three stay cables and six pressure bars. The six hinging nodes are respectively located at the six vertexes of a two-dimensional hexagonal geometry, and the pivoting node is located at the central point of the hexagonal geometry. The four first-type pressure bars are symmetrically arranged on the two sides of the hexagon, and coincide with the four edges of the hexagon. The other two second-type pressure bars are located inside the hexagon, and form a scissor-like hinge through the pivoting node. The three stay cables are located inside the hexagon, and the six hinging nodes are connected in pairs by the three stay cables. When all the stay cables are pre-tensioned, pre-pressure exists in all the pressure bars, and the structural unit is a self-balancing cable bar system. When the first-type stay cable or the third-type stay cable is loosened, the structural unit can be folded to form a compact bundle shape. The foldable cable bar structural unit has a good application prospect in foldable / scalable cable bar structural systems.

The instant invention includes a flexible fire-resistant thermally insulated composite structure designed in some embodiments to pass through an opening. The structure may be self-supporting due to the stiffness of various layers, and battens may contribute to the self-supporting capacity of the structure.The flexible composite structure may have a collapsed transit configuration, allowing the structure to be compressed to more easily pass it through an opening, a rotable attachment to allow the structure to rotate away from the opening, and a releasable attachment for attaching the structure around an opening periphery. In another embodiment, the structure may also include a bottom and such a structure could provide shelter in conditions ranging from ambient environmental conditions to the extreme heat of certain fires.The insulative structures of the instant invention are not limited to embodiments designed to rest on generally horizontal surfaces. For example, it may be desirable to utilize such a structure to block an attic fan, or other roof penetration, during certain seasons of the year. Such an embodiment may also include a releasable attachment configured for releasably attaching the installation periphery to a surface inclined from the horizontal.

Aspects of the invention provide hollow nanoparticles and uses thereof. In particular, the invention provides membrane-enclosed vesicles comprising a truncated form of an HBsAg S protein lacking one or two of its amino-terminal transmembrane domains.

The invention provides a distributed communication-in-motion light shaped antenna which is composed of a plurality of distributed front ends (9), a distributed optical fiber signal network (6), a distributed low-frequency signal network (7) and a distributed grating sensor network (8). Each of the distributed front ends comprises a distributed antenna sub-array (1), an electro-optical / photoelectric conversion chip (3), a sub-array wave beam control system (4) and a grating sensor (5), which are electrically connected around a silicon-based integrated transceiver chip (2). Under command control of a centralized processing terminal (10), each distributed front end (9) can implement beam scanning and satellite signal alignment; and then the plurality of distributed front ends (9) implement beam forming and real-time satellite communication under command control of the centralized processing terminal (10). The technical problem that the existing communication-in-motion antenna is designed in an integrated mode in an aperture, is large in size and heavy, and is hard to match a flexible wing structure in stiffness is solved.

The invention discloses a frequency-raising type vibration energy collecting system and a collecting method. The environmental vibration frequency is sensed through a low-frequency harmonic vibration structure, and the low-frequency harmonic vibration structure is in contact and collision with a high-frequency harmonic vibration structure to cause the high-frequency harmonic vibration structure to realize self-excited vibration, so that the purpose of raising the frequency is achieved. Through the high-frequency vibration of the high-frequency harmonic vibration structure, a piezoelectric material layer on a high-frequency vibration beam is extended and compressed in a periodicity manner, the high-efficiency conversion from vibration energy to electric energy is realized, and high-density output and low operating frequency are considered together. The vibration beam with the low-frequency harmonic vibration structure has the advantages of lower structural stiffness and higher harmonic vibration quality, the resonance vibration frequency can be reduced to below 50 Hz, the response to the environmental vibration frequency is sensitive, and the application range is wider.

The present invention provides methods, systems and devices that reduce dyskinesis and hypokinesis. The contoured heart assist device of the present invention includes a selectively inflatable end-systolic heart shaped bladder with one or more contoured supports configured to surround at least a portion of the heart and provide curvatures similar to the proper shape of the heart when the device is pressurized and one or more fluid connections in communication with the selectively inflatable end-systolic heart shaped bladder for pressurization and depressurization.

The invention concerns a vehicle front interior structure comprising an air flow distribution duct arranged essentially parallel with a windshield. The invention is characterized in that the distribution duct is divided into at least two sections connected by a flexible joint that extends in a direction essentially across the distribution duct.

A brake apparatus includes a caliper with two housing members secured together by a C-section bridge. The housing members straddle a rotor, so as to be able to urge one or more pistons disposed therein to apply brake pads against the rotor, thereby effectuating a braking force on the rotor. The C-section bridge provides support for the members and reduces the clamshell effect generated by application of the breaking force.

An aeronautical vehicle that rights itself from an inverted state to an upright state has a self-righting frame assembly has an apex preferably at a top of a central vertical axis. The apex provides initial instability to begin a self-righting process when the vehicle is inverted on a surface. A lift and stabilization panel extends across an upper portion of said frame to provide lift, drag and / or stability. A propulsion system can be located within a central void of the frame assembly and oriented to provide a lifting force. An electronics assembly is also carried by the self-righting frame for receiving remote control commands and is communicatively interconnected to the power supply for remotely controlling the aeronautical vehicle to take off, to fly, and to land on a supporting surface. The frame provides self-righting functionality and protection of elements carried therein.

The invention provides a method and device for installing a longitudinal guide rail. A U-shaped steel beam frame is adopted as a rigid support and is of a stronger-rigidity integral structure formed by a longitudinal strut, a transverse strut and an inclined strut, and the U-shaped steel beam is temporarily welded and connected with an anchor plate embedded cluster on a concrete convex wall to form a rigid structure with the stronger rigidity, thus the installation regulation and fixation of the longitudinal guide rail can be convenient, and the high-precision requirement of the longitudinal guide rail is met. A built-in steel frame is connected with the longitudinal guide rail into a whole, thus the rigidity is increased and the rigidity requirements of the transportation and the hoisting are met. The method and device in the invention can be especially suitable for the installation construction of the longitudinal guide rail of a vertical tooth-climbing vessel-lifting motor vessel with the large total installation height, the low structure rigidity and the high installation precision, and other similar installation construction projects.

The invention discloses a triboelectric three-dimensional flexible tactile sensor which comprises arrayed triboelectric three-dimensional flexible tactile sensing units, and each tactile sensing unitis composed of an insulating flexible inverted circular truncated cone, a metal electrode, a flexible covering layer, a flexible middle layer, a flexible bottom layer and a lead. The insulating flexible inverted circular truncated cone serves as a three-dimensional tactile force sensing structure and can convert external contact forces of different modes and sizes into corresponding deformation. Atriboelectric pair composed of the insulating flexible inverted circular truncated cone and the metal electrode converts the deformation into an electric signal through contact electrification and electrostatic coupling effects, and self-powered and high-sensitivity measurement of three-dimensional contact force including contact positive stress and slip shearing force is achieved. The triboelectric three-dimensional flexible tactile sensor is simple in overall structure and easy to manufacture, and array expansion of the tactile sensing units can be facilitated through the high-symmetry structure. The triboelectric three-dimensional flexible tactile sensor is excellent in comprehensive performance and can be popularized and applied to the fields of robot tail end dexterous hands, artificial limbs, surgical manipulators and the like.

A thermoelectric device includes a thermally conductive first plate and at least one thermoelectric sub-assembly. The first plate has a layer with a plurality of electrically conductive first portions and a plurality of electrically insulating second portions separating the first portions from one another. The at least one thermoelectric sub-assembly includes a thermally conductive second plate and a plurality of thermoelectric elements in a region between the first plate and the second plate. The plurality of thermoelectric elements is in electrical communication with the plurality of electrically conductive portions of the first plate, in electrical communication with electrically conductive portions of the second plate, and in thermal communication with the first plate and the second plate. The plurality of electrically insulating second portions includes a plurality of segments at least partially outside the region, the segments configured to avoid degradation of a structural rigidity of the first plate.

A fuel injector comprising a nozzle having a nozzle needle which is moveable with respect to a first needle seat to control fuel delivery through a nozzle outlet. The injector includes a nozzle control valve for controlling fuel flow into a control chamber through a first passage to pressurise the control chamber, and for controlling fuel flow out of said control chamber through said first passage to depressurise the control chamber. Movement of the nozzle needle is controlled by fuel pressure within the control chamber, such that pressurising the control chamber causes the nozzle needle to be urged against the first needle seat to close the nozzle outlet, and depressurising the control chamber causes the nozzle needle to lift from the first needle seat to open the nozzle outlet. The nozzle needle defines, at least in part, a restricted passage through which fuel can flow into the control chamber as the control chamber depressurises. The fuel flow into the control chamber through the restricted passage serves to reduce the rate at which the control chamber depressurises, thereby reducing the rate at which the nozzle needle lifts from the first needle seat to open the nozzle outlet.

An embedded cobasis plane two-dimension balance double-drive double-workpiece platform positioning system belongs to the technical field of semiconductor manufacturing equipment; two X-direction single-plate linear motor stators arranged in parallel are embedded between a workpiece platform A and a workpiece platform B on a base station along X direction; the two X-direction single linear motor stators are respectively matched with X-direction single-plate linear motor active cells on the workpiece platform A and the workpiece platform B in sequence; the upper surface of the X-direction single-plate linear motor stators is in parallel with the datum plane of the base station and is embedded in the groove of the base station; connection material is filled all around the X-direction single-plate linear motor stators. The system of the invention avoids the vibration and instability of the workpiece platform caused by center of mass offset generated by single scan and inertia torque change generated by unilateral variable-speed drive, the structure is simplified, the rigidity is enhanced and the reliability is improved.

A bidirectional vibration absorption type rear suspension device of a driving cab of an automobile comprises a left mechanism and a right mechanism. The left mechanism and the right mechanism are bilaterally symmetric, structures of the left mechanism and the right mechanism are consistent, the left mechanism is connected with the right mechanism by oil tubes and a crossbeam, both the left mechanism and the right mechanism consist of upper connecting supports, middle connecting plates and lower connecting supports, upper portions of the upper connecting supports are fixedly connected with thedriving cab, lower portions of the upper connecting supports are movably connected with hydraulic locks, lower portions of the hydraulic locks are fixedly connected with the middle connecting plates by top connecting holes, side connecting holes on the middle connecting plates are hinged with transverse vibration absorbers, the other end of each transverse vibration absorber is hinged with the corresponding lower connecting support, and the oil tubes are connected onto the hydraulic locks. The lateral buffering performance of the bidirectional vibration absorption type rear suspension device is better, movement discordance can be avoided, and smoothness, safety and comfortableness of the driving cab can be improved.

This invention relates to an offshore system, comprising a drilling vessel, e.g. a semi-submersible drilling vessel comprising a deck on which a drilling tower for performing drilling operations is mounted. The vessel is furthermore provided with a support for a tiltable J-lay tower for laying a pipeline, said support being arranged next to the drilling tower, and the offshore system further includes a J-lay tower which is or can be mounted on said support.

The invention discloses a strong shock-absorption type rear suspension device of an automobile cab. The strong vibration-attenuation type rear suspension device comprises a left mechanism and a right mechanism, wherein the left mechanism and the right mechanism are in bilateral symmetry and have the consistent structure; the left mechanism is connected with the right mechanism by an oil tube and a beam; in the left mechanism and the right mechanism, the lower part of an upper connecting bracket is movably connected with a support trench on a hydraulic lock by a middle shaft; the lower part of the hydraulic lock is fixedly connected with the upper end of a middle connecting bracket; a side end of the middle connecting bracket is connected with a lateral shock absorber; the bottom end of the middle connecting bracket is in threaded connection with a spring shock absorber; the lower part of the spring shock absorber is connected with the middle part of the lower connecting bracket; the top of the lower connecting bracket is connected with a front beam and a back beam; and the front beam and the back beam are respectively connected with the lateral shock absorber by front and back beam connecting plates. The strong shock-absorption type rear suspension device has good lateral buffer performance, does not cause reciprocating sidesway of the cab, improves driving safety, can avoid motion discordance with the vertical motion of the cab, has strong guidance action for parts, and can effectively prevent the parts from sliding.

The invention discloses a floating breakwater unit body with a frame provided with thin films with holes. The floating breakwater unit body comprises the cuboid frame formed by twelve edges, and the horizontal top thin film with the holes is laid on the upper end face of the cuboid frame, wherein the top thin film with the holes is connected with the edges. The multiple layers of horizontal lower middle loose thin films with the holes are arranged in the height direction from the upper end face to the lower end face at equal intervals, wherein the horizontal lower middle loose thin films with the holes are connected with the front end and the rear end of the cuboid frame, and the length of the horizontal lower middle loose thin films with the holes is larger than that of the cuboid frame. The perpendicular thin films with the holes are laid on the front end face and the rear end face of the cuboid frame respectively, wherein the perpendicular thin films with the holes connected with the edges. Retaining rings used for splicing and connecting moorings are further arranged at the eight corners of the cuboid frame structure. The floating breakwater unit body is good in wave eliminating effect, small in structure restoring force, capable of well shielding long waves and short waves, convenient to construct and maintain and suitable for water areas which have different water depths and are not suitable for the construction of traditional form breakwaters.

The invention relates to the technical field of refrigerators of household appliances, in particular to an anti-liner cracking refrigerator evaporator. The anti-liner cracking refrigerator evaporator comprises an aluminum panel (1) and an evaporation tube (3) bonded on the aluminum panel (1); a plurality of transverse empty slots (2) are formed on the aluminum panel (1) along a longitudinal direction; and the transverse empty slots (2) are distributed in two pipelines adjacent to the evaporation tube (3). In the evaporator, the transverse empty slots (2) are made on the aluminum panel (1), so the effect of relieving thermal stress of a liner can be achieved so as to reduce the cracking of the liner, and the material cost of the aluminum panel can be reduced.