165results about How to "Improve the force characteristics" patented technology

The invention discloses a driving-driven hybrid vibration isolator which comprises an air bag vibration isolator, wherein the air bag vibration isolator comprises an upper cover plate, a lower cover plate and an elastic bag body arranged between the upper cover plate and the lower cover plate. An electromagnetic actuator is arranged in the elastic bag body and comprises an armature, an iron core matched with the armature and a coil winding on the iron core, the armature is fixed on the upper cover plate, the iron core is fixed on the lower cover plate, an air gap is reserved between the armature and the iron core, a radiating sheet is arranged on the coil, and the bottom of the radiating sheet is connected with the lower cover plate. An air hole and a line hole respectively leading to the elastic bag body are arranged on the lower cover plate, an air sealing socket is arranged at the outlet position of the line hole, and a vibration sensor connected with a work state control end of the electromagnetic actuator is arranged on the lower cover plate. The driving-driven hybrid vibration isolator has the advantages of being high in reliability, small in energy consumption, low in cost, small in occupied space, good in adaptability and the like, can be adjusted adaptatively along with load changing of a vibration isolating device, and can achieve synchronous and effective control of broadband vibration and line spectrum vibration.

The invention provides a two-DOF moving shunt connection decoupling mechanism. The whole mechanism is fixed on a base platform by a guideway; two Y-direction guideways and a Y-direction driving device are fixed on an XOY basic platform; a Z-direction guideway is fixed on a YOZ basic platform; a Y-direction sliding block is fixed on the Y-direction guideway; two lower sliding supporters are respectively fixed on corresponding Y-direction sliding blocks; an upper supportor is connected with the two lower sliding supporters by a parallelogram mechanism consisting of 8 supporting rods and a rotation pair; an X-direction guideway is fixed on the upper supporter; an X-direction driving device is fixed on the Z-direction guideway; furthermore, a shell of the X-direction driving device is fixedly connected with the upper supporter; a movable platform is fixed on the X-direction guideway. The invention combines an isosceles triangle two-force member truss structure and the parallelogram structure, thus leading the final two-DOF moving shunt connection mechanism to have the advantages of implementing the decoupling of two-DOF, stable structure, high rigidity, good forcing characteristic, high transmission efficiency, simple structure, easy control, high operation precision and low cost.

A flexible cable driven three-freedom parallel mechanism is composed of three drive units and moving platform. The said driven unit comprises base, reel installed along with motor and vertical column. The steel wire cable wound on the said reel passes through lower static pulley, counterweight and upper static pulley and then fixed to the moving platform. The steel wire cables for threed drive units are all fixed to the moving platform to form a triangle. Its advantages are big working space and high stressing performance and speed.

The invention discloses a positioning vibration isolation platform. The precision positioning vibration isolation platform comprises a positioning vibration isolation device and an active controller which are electrically connected, wherein the active controller controls position and vibration of the positioning vibration isolation device; the positioning vibration isolation device comprises three supporting legs and a load flat plate; the three supporting legs are distributed at the vertexes of a regular triangle and are used for supporting the load flat plate; each supporting leg is provided with a spiral spring serving as a main supporting part; a displacement sensor is arranged below a connecting plate and is used for detecting the displacement of the connecting plate; a vertical speed sensor is arranged at the position, corresponding to the supporting legs, of a load platform; and the active controller adopts a master-slave open structure, consists of an upper control computer and a lower execution controller and is used for keeping the load platform at the set position and effectively isolating the influence of ground vibration on the precision of the platform. The precision positioning vibration isolation platform can be widely applied in the fields of precision processing, precision measurement, optical tests and the like with special requirements on the precision of the plane position.

The invention discloses a method for primary support with a corrugated steel plate and concrete combined structure taking the place of a steel grating. The corrugated steel plate and concrete combined structure is formed by assembling and connecting an upper supporting corrugated plate, a side wall corrugated plate and an inverted arch corrugated plate into a ring; two arch feet of an upper step of a cavern are fixedly provided with two pieces of H-section steel, and the upper end of the upper supporting corrugated plate and the upper end of the side wall corrugated plate are supported and fixed through the H-section steel; two arch feet of a lower step are fixedly provided with two pieces of channel steel, the lower end of the side wall corrugated plate is supported and fixed through the channel steel, and an inverted arch lap joint is reserved on the lower end of the side wall corrugated plate; the upper supporting corrugated plate, the side wall corrugated plate and the inverted arch corrugated plate are sequentially connected through flanges in the longitudinal direction; concrete is poured among the upper supporting corrugated plate, the side wall corrugated plate, the inverted arch corrugated plate and surrounding rock. The structure is manufactured through the structure mixing a corrugated steel plate and the concrete, stress is balanced through the structure and the surrounding rock, strength of the primary support is guaranteed, and the structure has the advantages that construction is facilitated, the period is short, efficiency is high, stability is high, and cost is low.

A clamp grip for a container transport system including rare earth permanent magnets encapsulated in non-magnetic material such as high quality steel. Flexible positioning of the magnets allow for adapting to varied design specifications. A rotatable control cam or cams may be used to adjust grip arms between a grip and a release position. Air gap distances between permanent magnets may be designed to maximize repelling force to assist in the functioning of clamp grip mechanism.

The invention discloses an active vibration isolation control platform. The active vibration isolation control platform comprises an active vibration isolation device and an active vibration isolation controller; the active vibration isolation device comprises a lower platform, a midbody and an upper platform; a voice coil motor actuator is arranged between the midbody and the lower platform; a linear variable differential transformer type displacement sensor is arranged between the upper platform and the midbody; and two three-freedom-degree acceleration sensors are arranged on the upper platform and the lower platform respectively. The vibration isolation controller is designed according to a master-slave open type control structure and consists of an upper control computer and a lower execution controller, wherein the upper control computer is a mainframe of an embedded type industrial control computer PC/104; and the lower execution controller is an open-type controller. The active vibration isolation control platform is quite effective on low-frequency vibration isolation and is applicable to precise manufacture, precise measurement, aerospace application and other vibration isolation fields with special requirement on vibration environment.

The invention provides a ballastless track system, which comprises a base (16), a track slab (12), a pouring layer (14), a connecting piece (13), two rows of track bearing platforms (11, 11'') and steel tracks (10), wherein the track slab (12) is arranged above the base (16); the pouring layer (14) is arranged between the base (16) and the track slab (12); the pouring layer (14) is formed by filling dense concrete emulsified asphalt cement mortar or resin mortar, and the inside of the pouring layer (14) is of a steel bar structure; the first end of the connecting piece (13) extends into the track slab (12), and the second end of the connecting piece (13) extends into the pouring layer (14); the two rows of track bearing platforms (11 and 11') are arranged on the track slab (12) in parallel; and the steel tracks (10) are arranged on the track bearing platforms (11 and 11'). The ballastless track system has the advantages of high reliability, good durability, easiness in construction and maintenance.

The invention relates to a successive type robot oriented to large loads. The successive type robot mainly comprises a rack, a flexible mechanical arm, a driving mechanism, an end effector and a driving rope, wherein one side of the rack is connected with the driving mechanism, the other side of the rack is connected with the flexible mechanical arm and the end effector, and the driving mechanismis connected with the flexible mechanical arm through the driving rope. The flexible mechanical arm mainly comprises an elastic body, an end connecting disc, a middle connecting disc and a spring; andthe driving mechanism comprises an end control disc, a middle control disc and an electric push rod. The successive type robot has the comprehensive performance of the successive type robot and has the excellent character of large bearing capacity; and the successive type robot can run within a non-structure task space with the compact structure size, can improve the stress character of a drivingstructure, and can adapt to the task requirement of large load.

The invention relates to a full penetration welding process. On the condition that the angle of an assembly bevel is 47 degrees, deep penetration welding backing welding is carried out at the downhand position through an arc-gathering pulse deep penetration welding machine by adopting solid wires, and then cosmetic welding is carried out at the downhand position or the boat-shaped position by adopting flux-cored wires. The process has the advantages of mainly realizing full penetration welding of fillet welds of U-shaped ribs with the thickness being 8 mm and being of great significance in improving the mechanical characteristics of the fillet welds of the U-shaped ribs, improving the weld quality of the U-shaped ribs and prolonging service life of bridges. The arc-gathering pulse deep penetration welding machine is mainly adopted for the full penetration welding process, arc permeation can be obviously improved, the power of penetrating the root of the assembly bevel can be improved, and formation of the weld roots can be guaranteed.

The invention discloses a ribbon-shaped single-tower cable-strayed-steel structure combined bridge and a construction process thereof. The combined bridge comprises a lower supporting structure, a main beam, an arch-shaped main tower which is arranged on the main beam and gradually backwards inclined from bottom to top, and two ribbon-shaped supporting structures which are positioned at the rear side of the main tower; the two ribbon-shaped supporting structures are both integrally fixedly connected with the main beam; the two-ribbon-shaped supporting structures and the main beam are lengthways arranged along the bridge direction; a plurality of cable-strayed ropes are arranged between the main tower and the main beam; each ribbon-shaped supporting structure is divided into a lower ribbon-shaped supporting structure and an upper ribbon-shaped connecting structure through the main beam. The construction process of the combined bridge comprises the steps of 1, constructing the lower supporting structure; 2, constructing the lower ribbon-shaped supporting structure; 3, constructing the main beam; 4, constructing the main tower and the upper ribbon-shaped connecting structure. The combined bridge is reasonable in structural design, convenient to construct, outstanding in mechanical performance and a good in use effect; a non-back cable-stayed bridge and a continuous rigid structural bridge are effectively combined, and the advantages of the two bridges are brought into full play.

The invention provides a construction method of a permanent retaining system characterized by joint work of basement floor slabs and retaining piles. The system comprises foundation pit retaining piles and members depending on a basement floor slab structure, such as horizontal outward-extending supports and middle beams. The retaining piles are anchored by using pre-stressed anchor cables in the foundation pit excavation stage. In the basement construction stage, the permanent outward-extending supports are arranged to replace anchor rods to bear the horizontal working force of the retaining piles. The retaining structure system and the body structure can function together permanently. The invention provides a novel underground space retaining system; a temporary foundation pit retaining structure can be changed into a permanent underground retaining structure; the properties of materials can be fully utilized; the construction costs can be reduced; and underground environments can be protected.

The invention discloses a wing spar/energy storage battery integrated structure, belonging to the field of flight vehicle design. The structure adopts a wing spar with a square section, and the energy storage battery is fixed in the wing spar by a rib strip and a positioning bolt, so that the wing spar is loaded intensively; a PMI foaming layer is arranged in the wing spar, so that the PMI foaming layer is not only used as a sandwich structure to bear shearing stress and also used as thermal insulation material to carry out thermal insulation for an energy storage battery; cooling fans are arranged at the two ends of the wing spar, and convection is formed by the gap between the rib strips so as to cool the energy storage battery. On the premise of guaranteeing the work temperature of the energy storage battery, the stress characteristic of the wing spar can be greatly improved, meanwhile, the structure is simplified, and the weight is reduced, so that a solar-powered airplane has higher flight efficiency.

An improved rubber support comprises a rubber support body with a hole or a lead core variable, a rubber support body with multiple holes or lead cores, a large-dimension rubber support body, a rubber support body shaped like a variable steel plate, a rubber support body with a variable steel plate arranged on the surface and a rubber support body made of a variable steel plate. The shape and the height proportion of middle holes or the lead cores can be adjusted, and the side boundaries of longitudinal and radial profiles of the middle holes or the lead cores are broken-line-shaped or curve-shaped, for example, the side boundaries can be trapezoid, V-shaped, T-shaped, folded-line-shaped or curve-shaped or in a combined shape so as to meet the requirements for different shock insulation design. A plurality of holes can be arranged on the horizontal profile of the rubber support, and the position, the number, the size and the shape of the holes can be adjusted according to requirements. None or one or several lead cores can be arranged, the lead cores can be placed in part or all of the holes, the shape of the holes or the lead cores can be single or variable, the height of the holes or the lead cores is adjustable, and the height of the holes can be the same as or different from that of the lead cores. The rubber support can be a large-dimension (such as large-diameter) rubber support. The surface of a middle interlayer steel plate can be non-planar, and the surface of the steel plate can be uneven and rough.

The invention discloses an anti-tension triple-connected string-in-string clamp for a 1,000kV ultrahigh-voltage power transmission line. The anti-tension triple-connected middle string clamp comprises a closed type before-clamping clamp, a closed type after-clamping clamp and a hydraulic screw rod, and also comprises a cross arm end part clamp and a wire end part clamp, wherein a fixing hole connected with a connection plate construction hole is formed in the center of the wire end part clamp; outwards extending arms are arranged on two sides of the wire end part clamp; connection holes connected with one end of the hydraulic screw rod are formed in the end parts of the extending arms; the extending arm on one side is hinged to the end part through a bolt and a nut; the cross arm end part clamp consists of two similar long-strip type connection plates; a connection hole hinged to the hydraulic screw rod is formed in one end of the cross arm end part clamp; a fixing hole hinged to a triple serial connected plate is formed in the other end of the cross arm end part clamp; the cross arm end part clamp, the wire end part clamp, the closed type before-clamping clamp and the closed type after-clamping clamp are made of a titanium alloy material. The anti-tension triple-connected middle string clamp for the 1,000kV ultrahigh-voltage power transmission line is simple in structure, high in intensity, light in weight, high in mechanical characteristic and convenient to mount and is suitable for the replacement of a middle string insulator of an ultrahigh-voltage triple-connected string.

The invention discloses a full-smooth straight claw type rotor. The full-smooth straight claw type rotor is composed of 11 curves including six circular arcs, equidistant curves of three cycloid curves, one line and an envelope curve of one line; from beginning of the pitch circle, the pitch circle circular arc GH, the envelope curve HI of the line, the third claw tip circular arc IJ, the equidistant curve JK of one cycloid curve, the claw bottom circular arc KA, the equidistant curve AB of another cycloid curve, the first claw tip circular arc BC, the claw top circular arc CD, the second claw tip circular arc DE, the equidistant curve EF of another cycloid curve and the line FG are sequentially connected in the anticlockwise direction; the adjacent curves are all in smooth connection, non-smooth tip points do not exist, two engaged claw type rotors are completely same, in the work process, complete correct engaging and smooth connection of lines of the claw type rotor can be achieved, the problem that claw back segment curves do not participate in engaging completely is solved, and work efficiency and work performance of claw type fluid machines are improved.

The invention aims at providing a novel structural wharf crane and a construction method thereof, and satisfies the needs of sectional transportation of the especially big bridge body of a modern long-span highway and a railway. The wharf crane of the invention comprises a plurality of groups of upright posts, a fixing suspension point and a crown block run system, and the fixing suspension point is composed of corresponding upright post bases, a main truss, a lifting truss, a windlass lifting system and pulley blocks. The wharf crane also comprises a cantilever, and the cantilever is composed of the front end of the main truss, the upright posts and a steel tube triangular support; the lower end is hinged with upright post bases; other upright posts are fixedly connected with the upright post bases. At least one upright post base near the cantilever forms a flexible connection with the main truss. The inner side of the steel tube triangular support is provided with a balance weight, and one balance weight is arranged on a position of the upright post. The main truss is provided with a longitudinal slope, and the slope can be set at 0.5 percent. The wharf crane has the construction method that the wharf crane steps over the highway, a riverbank and the cantilever are extended to a riverway; the wharf crane is spanned on a position of a pier used for constructing a new railway bridge, an included angle exists between a center line of the main truss of the wharf crane and the center line of the riverway, and the lifting truss is parallel to the center line of the highway.

The invention provides a full penetration welding method for U ribs. According to the method, a reverse dip angle is arranged on a to-be-welded panel relative to the horizontal plane during backing welding, a poly-arc pulse deep penetration welding gun at a specific angle is matched to carry out welding, and through gravity, a phenomena of embossment and undercut caused by tensile force on the surface of molten iron can be overcome, so that full penetration welding between U ribs and panel welding seams is well completed, and the forming at the inner side and outer side is favorable. Through full penetration welding seams, net sectional areas of the welding seams are ensured, so that equal strength between the welding seams and base materials is ensured, the phenomenon of stress concentration of welding seam roots due to partial penetration is avoided and the anti-fatigue performance of welding joints is effectively enhanced.

The invention discloses a telescopic type size variable continuous type robot. A driving mechanism, an accommodating mechanism, a guiding mechanism, a flexible mechanical arm and an end effector are arranged in a box body, wherein the driving mechanism comprises a motor A, a gear A, a gear B, a rotary disk, a motor B, a rotary shaft, a winding shaft and a driving rope; the guiding mechanism comprises a gear rack A, a gear C, a gear rack B and a gear D; the accommodating mechanism comprises a motor C, a synchronous pulley, a synchronous belt, a guiding plate and an accommodating groove; the flexible mechanical arm mainly comprises an elastomer, a tail end disc and a middle disc; the side, not connected with the elastomer, of the tail end disc is connected with the end effector; and the flexible mechanical arm is driven by the driving mechanism to freely stretch out of and retract in the box body and bends towards all directions. The telescopic type size variable continuous type robot can operate in a non-structural task space with a compact structure size, also changes the connecting disc space to improve the mechanical characteristics of the driving mechanism and further freely changes the length of the mechanical arm to be adapted to diversified task demands.

The invention discloses an arch bridge buckling characteristic coefficient increase based half-through steel arch bridge reinforcement method. An inverted arch is arranged below a main arch ring arch rib of a half-through steel arch bridge, the inverted arch and the arch rib are connected through oblique rods, and the inverted arch and an original arch rib are connected by inverted arch connectors welded to the original arch rib, so that the inverted arch structure for reinforcement and an original main arch ring form a rigid restraint supporting system; the arch bridge buckling characteristic coefficient increase degree in the rigid restraint supporting system is in close relation with seven parameters of the inverted arch and a to-be-reinforced arch, and by setup of different variable values of the seven parameters, a mid-span moment ratio of the to-be-reinforced arch and the reinforced arch is used as a bending moment change characterization quantity to obtain a relation between the seven parameters and the bending moment change characterization quantity on the basis of a finite element parameter analysis fitting method. In application of the arch bridge buckling characteristic coefficient increase based half-through steel arch bridge reinforcement method, a structural characteristic internal force can be solved according to the relation, and accordingly an optimal scheme can be selected for inverted arch reinforcement.

The invention discloses a geocell reinforced cement concrete pavement structure and a surface layer plate thickness calculation method. The pavement structure mainly comprises a base layer, a surfacelayer and a wearing layer which are sequentially laid from bottom to top. The base layer is composed of an upper geotextile layer, a lower geotextile layer and a middle geocell reinforced graded broken stone layer; the surface layer is a cement concrete layer reinforced by a geocell; the wearing layer comprises a cement mixture wearing layer and a geogrid; pull rings are reserved on the two sidesof each geocell in a road direction, the geocells are stretched to be in a tensioned state, and wooden wedges penetrate through the pull rings to fix the geocell at the outermost end. The surface layer plate thickness calculation method mainly comprises the steps of traffic analysis, initial simulation of a pavement structure, determination of pavement material parameters, and checking of load stress, temperature stress and a structure limit state. The problems that an existing pavement structure is low in strength, and a cement concrete pavement is subjected to fatigue fracture, mud pumping,slab staggering and the like under heavy-load traffic are solved, so that the pavement structure has high bearing capacity and deformation resistance, and damage to the pavement structure is reduced.

The invention discloses a straight claw rotor which comprises ten curves: five arcs, two equidistant curves of a cycloid, a cycloid, a line segment and an envelope line of the line segment; the pitch circle arc GH, the envelope line HI of the line segment, the equidistant curve IJ of the cycloid, the claw foot arc JA, the equidistant curve AB of the cycloid, the first claw tip arc BC, the claw top arc CD, the second claw tip arc DE, the cycloid EF and the line segment FG are sequentially connected counterclockwise from a pitch circle; and all the other molded lines are smoothly connected except for a connection point I of the envelope line HI of the line segment and the equidistant curve IJ of the cycloid. two mutually engaged claw rotors are identical; all the molded lines of the claw rotor can be engaged correctly during working; the problem that a claw back curve does not participate in engagement completely is solved; and the working efficiency and working performance of a claw fluid machine are improved.

The invention provides a large commercial remote sensing satellite platform configuration and an assembly method. The platform configuration comprises a satellite platform main structure, a docking ring and a solar cell array, wherein the satellite platform main structure comprises a butt joint plate, storage box plates, partition plates, a camera plate, outer plates and truss rod assemblies. Thestorage box plates and the partition plates are arranged on the butt joint plate. A plurality of storage box plates and a plurality of partition plates are arranged and are transversely and longitudinally arranged to form a well-shaped structure; the camera plate is arranged above the well-shaped structure; the four outer plates are supported by the truss rod assemblies and arranged around the well-shaped structure; every two adjacent outer plates are connected through the corresponding outer skin; the solar cell array is arranged on the outer surfaces of the outer plates; the docking ring isfixed below the butt joint plate; subsystem single-machine devices are installed on the storage box plates and the partition plates; a propelling subsystem assembly is installed on the butt joint plate; and the two storage tanks are symmetrically installed relative to the mass center of the platform. The configuration is small in structural weight proportion, small in inertia, good in mechanical property, good in solar cell array area expansibility and convenient to assemble and operate.