226 results about "Metal rubber" patented technology

According to the high-damping anti-drawing three-dimensional seismic mitigation and isolation support, the long-term load borne by the metal rubber composite spring is reduced, and the service life of the metal rubber composite spring is prolonged. The vertical seismic mitigation and isolation assembly and the horizontal seismic mitigation and isolation assembly are connected and fixed. The metal-rubber composite spring is arranged between the vertical seismic mitigation and isolation top plate and the vertical seismic mitigation and isolation bottom plate, the upper end of the metal-rubber composite spring is fixed with the vertical seismic mitigation and isolation top plate, and the lower end of the metal-rubber composite spring is fixed with the vertical seismic mitigation and isolation bottom plate; the upper supporting seat is fixed on the vertical seismic mitigation and isolation top plate, and the lower supporting seat is fixed on the vertical seismic mitigation and isolation bottom plate; the shear fork lifting mechanism is movably arranged between the upper supporting base and the lower supporting base, the upper bearing base is slidably connected to the lower portion of the upper supporting base, and the lower bearing base is slidably connected to the upper portion of the lower supporting base. The upper end of the scissor fork is connected with the upper bearing seat, and the lower end is connected with the lower bearing seat; the elastic supporting mechanism is connected with the shear fork and elastically supports the shear fork.

The invention relates to the technical field of assembly equipment, in particular to automatic assembly equipment for metal rubber parts for universal joint shaft sleeves, which comprises a rack, a storage hopper is mounted at the top end of the rack, a bearing table capable of sliding up and down is mounted at the corresponding position of the lowest point of an inclined guide surface, and a discharge port is formed in the side wall of the storage hopper. An assembling table is installed on the top face of the rack, a vertically-arranged lifting air cylinder is installed on the top face of the rack, a steering cylinder is connected to the telescopic end of the lifting air cylinder, a positioning clamp is rotationally connected to the interior of the steering cylinder, and the inner side contour of the positioning clamp is matched with the outer surface of a metal shaft sleeve. The bottom face of an inner cavity of the storage hopper is arranged to be an inclined material guiding face, a conveying belt is installed in the inner cavity of the storage hopper and penetrates through the inner side of the material bearing table, and the metal shaft sleeve sorting device aims at solving the problems that in traditional assembly, metal shaft sleeves are often fed through a vibration disc or manual work, the posture is disordered, and the sorting efficiency is low.

The invention provides a large-drift-diameter composite metal pipe outer packer for horizontal well shaft reconstruction, and relates to the technical field of petroleum downhole tools, the large-drift-diameter composite metal pipe outer packer comprises a pipe column body, a composite metal rubber sleeve, a hydraulic expansion control device and a valve system, and the composite metal rubber sleeve is arranged on the outer side of the pipe column body in a sleeving mode; the hydraulic expansion control device is connected to the interior of the pipe column body, the hydraulic expansion control device and the composite metal rubber sleeve are in telecommunication connection and are oppositely arranged, and the hydraulic expansion control device is used for controlling hydraulic pressure to enable the composite metal rubber sleeve to expand; the valve system is connected to the interior of the tubular column body and used for locking expansion liquid and maintaining constant expansion pressure. According to the valve system, during fracturing or acidification, the packing capacity of all well sections of the annulus can be guaranteed, fracturing construction operation can be conducted for multiple times, meanwhile, construction steps are simplified, and the problems that in the prior art, a packer is short in service life and small in application range are solved.

The invention discloses an aero-engine impact load deformation self-adaptive rotor-supporting structure, and belongs to the technical field of aero-engine bearing structure design. Comprising a rotor journal, a bearing, a bearing seat, a turn-back bushing, metal rubber and a sleeve. The rotor journal is used for transmitting rotor load, the bearing outer ring is installed on the bearing seat, the section of the turn-back lining is in a U shape, one end of the inner layer of the turn-back lining abuts against a shaft shoulder of the rotor journal, the other end of the turn-back lining presses and fixes the bearing inner ring through the nut and the sleeve, and the metal rubber is arranged in an interlayer of the turn-back lining. The turn-back bushing can reduce the rotor-bearing angular rigidity, allows larger angular misalignment, and reduces the load transmitted to the bearing and a force bearing system; the metal rubber can dissipate impact energy when the turn-back lining deforms. The turn-back lining and different inner rings can be combined in various modes, for example, the turn-back lining and the first inner ring can be manufactured into a whole, and when the turn-back lining is matched with the second inner ring or the third inner ring, a flexible lining can be matched to further reduce rigidity. By means of the structure, the safety and reliability of the aero-engine under the impact load are effectively improved.

The invention discloses an underwater communication equipment technology, and aims to provide a full-sea-depth antenna packaging assembly and a packaging method thereof.The full-sea-depth antenna packaging assembly is characterized in that the full-sea-depth antenna packaging assembly comprises a cabin penetrating part, an antenna unit, an antenna protection cover, a vulcanization coating layer and a sealing ring, and the full-sea-depth antenna packaging assembly is used for achieving stable transmission of signals in a deep sea environment; the antenna unit is used for transmitting and receiving electromagnetic wave signals; a conductive channel is arranged in the cabin penetrating piece and used for being electrically connected with the antenna unit so that electric signals inside and outside the cabin can penetrate through the cabin. The whole antenna protection cover is cylindrical, the end part of the antenna protection cover is in transition connection to form a hemispherical shape, and an antenna placement area is formed in the antenna protection cover; the vulcanized coating layer is coated on the peripheral side of the joint of the antenna protection cover and the cabin penetrating piece; the sealing ring is arranged between the antenna protection cover and the cabin penetrating piece and is of a metal-rubber composite structure. The invention is suitable for the technical field of underwater communication equipment.

The invention provides a cage bar type broadband damping device arranged in a force-bearing radial plate of an aero-engine. The cage bar type broadband damping device comprises a plurality of cage bars arranged in the force-bearing radial plate in the radial direction, an inner mounting plate, an outer mounting plate, a damping ring, a cover plate and the like. The installation plate is provided with the extending edge, the hollow force bearing radial plate can be installed in the extending edge, then the damping ring, the ends of the cage bars and the cover plate are sequentially installed on the installation plate through bolts, and installation of the cage bar type broadband vibration reduction device can be achieved without modifying the structural form of the force bearing frame. Vibration energy on the force-bearing frame is directionally induced to the cage bars, the vibration energy is dissipated through the damping rings made of metal rubber, so that vibration absorption-energy dissipation in a broadband range and effective control over vibration response of the force-bearing frame are achieved, and the device has the advantages of being simple in structure, small in additional mass, convenient to disassemble and assemble and the like; and design parameters can be adjusted in a targeted mode to adapt to different working environments, and the method has wide application prospects in the field of aero-engine vibration control.

The invention provides a three-way combined type vibration isolation device based on an adjustable damping magneto-rheological vibration absorber, the vibration isolation device is connected with an air compressor, the vibration isolation device comprises blades used for stirring magnetic fluid, and when the vibration isolation device is vibrated, the blades are used for stirring the magnetic fluid. The magnetic fluid is stirred by the blades to dissipate energy so as to suppress the vibration amplitude transmitted to the lower layer of the vibration isolator; the vibration isolation device adjusts the vibration reduction effect by changing the angle of stirring the magnetic fluid blades, or changes the viscosity of the magnetic fluid according to the change of the rotating speed of the air compressor, and adjustable vibration reduction control in a wide frequency domain is formed. The variable-frequency air compressor has the fluid vibration absorption capacity and the metal rubber vibration absorption capacity at the same time, meanwhile, the viscosity of the magnetic fluid can be changed according to the change of the rotating speed of the variable-frequency air compressor, and then the wide-frequency-domain and adjustable vibration reduction control effect is achieved.

The invention discloses a high-overload high-rotation high-precision attitude measurement system which comprises a base, a top cover, an inertial measurement unit, a micro-hemisphere gyroscope, a support circuit, an inner base and a frame, and the inner base is mounted at the bottom of the base through a rubber damping pad; the bottom of the frame penetrates through a channel in the inner base to be fixedly bonded with a rubber anti-vibration pad. The disc edge of the upper end face of the frame is in lap joint with the upper end face of the inner base and connected with the inner base through a metal rubber shock absorber. A stepped hole is formed in the frame, the inertial measurement unit is installed below the stepped hole and fixed in a filling and sealing mode, and the micro-hemisphere gyroscope is installed above the stepped hole and is lower than the upper surface of the stepped hole. The support circuit is positioned above the micro hemispherical gyroscope and is fixedly mounted on the frame; the top cover is buckled on the base, and the supporting circuit, the frame and the inner base are pressed between the top cover and the base. The device can stably work under the high-overload and high-rotation conditions, and continuous and accurate attitude data are provided.

The invention discloses a high-vibration-damping cellulose aerogel-metal rubber composite material for efficient oil-water separation as well as a preparation method and application of the high-vibration-damping cellulose aerogel-metal rubber composite material. The composite material is obtained by taking metal rubber obtained by stamping as a metal framework, adding bacterial cellulose aqueous dispersion containing APTES and PEI to perform vacuum impregnation to form colloid, then performing freezing and glutaraldehyde cross-linking curing to form an enhanced chemical cross-linked network structure, and finally performing solution replacement in absolute ethyl alcohol and performing normal-pressure drying. Under the chemical crosslinking action and the support of metal rubber, the integrity and mechanical strength of the pore wall of the obtained material are ensured, and meanwhile, under the modification of PEI, the material has excellent super-hydrophilicity-underwater super-oleophobicity; therefore, the composite material has efficient oil-water emulsion separation performance, lasting super-hydrophilic / underwater super-oleophobic stability, excellent mechanical performance and dye-containing wastewater treatment performance.

The invention relates to a multi-physical mechanism synergistic light sound absorption and insulation integrated sandwich structure and a manufacturing method thereof.The multi-physical mechanism synergistic light sound absorption and insulation integrated sandwich structure comprises a panel, a sandwich layer and a micro-perforated panel which are arranged from top to bottom, a cavity is formed in the sandwich layer, and multiple sets of cantilever beam type harmonic oscillators arranged in an array are arranged in the cavity; the cantilever beam type harmonic oscillator comprises a cantilever beam base body and a metal rubber mass block fixed at the top end of the cantilever beam base body. According to the invention, through the coupling design of the micro-perforated plate and the internal grating cavity of the sandwich layer, the sound absorption frequency band is further widened, the sound absorption coefficient of the whole structure in a middle-high frequency band is improved, collaborative optimization of broadband sound absorption and low-frequency sound insulation is realized, the problem that a traditional harmonic oscillator is easy to lose efficacy in high-temperature and low-temperature environments is effectively solved, and the sound absorption efficiency is improved. And meanwhile, due to the design of the integrated sandwich structure, the problems of aging and layering of the adhesive layer in severe environments such as high temperature and damp and hot environments are avoided, and the integrity and durability of the structure are also remarkably improved.

According to the high-strength good-toughness damping vehicle skylight glass framework, the skylight glass framework is directly connected with the glass supporting frames, the glass supporting frames are directly connected with vehicle skylight glass, and the skylight glass sealing strips are connected between the glass supporting frames; the skylight glass framework comprises a framework rubber supporting layer forming a glass framework body. The PU supporting frame and the glass framework support normal work of the skylight glass of the vehicle together, the metal rubber supporting frame is embedded in the rubber framework, the rubber framework is filled with the non-Newtonian fluid medium, and the rigidity of the glass framework is remarkably improved through the composite foam metal support, the metal rubber support and the rubber framework support. The firmness of the framework is improved by embedding the flexible permanent magnetic strips, the outer surface of the rubber framework is wrapped with the woven organic fibers, the rubber framework is effectively reinforced and upgraded, the fireproof and anti-corrosion performance of the rubber framework is remarkably improved by coating the fireproof and anti-corrosion coating, and the structure and performance of the glass framework are remarkably improved.

The application provides a spring bidirectional composite metal rubber damper and a working method thereof. The spring bidirectional composite metal rubber damper comprises a vertically arranged outer sleeve, one end of the outer sleeve is closed, the other end of the outer sleeve is internally provided with an inner sleeve, one end of the inner sleeve is closed, the other end of the inner sleeve is movably connected with a core shaft, an annular clamping shoulder is arranged in the middle of the inner sleeve, the annular clamping shoulder divides the inner sleeve into an upper damping cavity and a lower damping cavity, the shaft section of the core shaft located in the upper damping cavity is externally provided with an upper damping pad, the shaft section of the core shaft located in the lower damping cavity is externally provided with a lower damping pad, a lower connecting mechanism is arranged on the closed end of the outer sleeve, the end of the core shaft extends out of the open end of the inner sleeve, and an upper connecting structure is arranged on the extending end. The application is convenient for damping of aerospace, aviation, nuclear industry and military instruments, can solve the poor rigidity adjustability of the current single metal rubber damper, that is, it is difficult to realize the coordination between low rigidity and high durability, meanwhile, the structure has high lateral rigidity and compact structure.

The present invention discloses a vertically stacked three-stage vibration damper based on metal rubber. The damper comprises an upper plate, a lower plate, an inner cavity, a central screw, and a three-stage vibration damping mechanism. The upper plate and lower plate are mounted at the upper and lower portions of the inner cavity, respectively. The central screw extends through the upper plate and into the inner cavity. The three-stage vibration damping mechanism comprises a first-stage vibration damping mechanism, a second-stage vibration damping mechanism, and a third-stage vibration damping mechanism. The present invention employs a three-stage stacked vibration damping method, resolving the problem of existing vibration dampers being unable to maintain good vibration damping performance in harsh environments while also providing a good position-limiting and buffering effect.

The invention discloses a modular metal rubber iron core of an axial motor, a preparation method and a preparation mold, and mainly relates to the technical field of motor iron core design and manufacturing. The modularized metal rubber iron core of the axial motor comprises a middle-layer iron core and outer-layer iron cores arranged at the two ends of the middle-layer iron core, the outer-layer iron cores and the middle-layer iron core are made of metal rubber materials, and the outer-layer iron cores and the middle-layer iron core are made of different materials; vibration generated by operation of the motor can be buffered, noise transmission is reduced, iron loss is reduced, reliable operation of the motor is guaranteed, and operation efficiency is improved; and the structure is simple, the equipment requirement is low, the manufacturing difficulty and cost are greatly reduced, the preparation process is simple and convenient, the production period can be effectively shortened, the production efficiency is improved, and the production cost is further reduced.

This invention belongs to the field of vibration reduction technology for nuclear power plant fans, specifically relating to a high-damping integrated vibration reduction foundation suitable for nuclear power fan fans. It consists of a steel frame connected to a height-adjustable vibration damper. The steel frame is welded from high-damping composite channel steel, which is composed of conventional channel steel and particulate dampers. The height-adjustable vibration damper uses the housing as the installation reference. An upper annular metal rubber is inserted into its inner cavity, followed by the upper end of the mandrel being inserted into the inner hole of the upper annular metal rubber. Then, a lower annular metal rubber is inserted into the inner cavity of the housing, with its upper end face against the mandrel. A base is then placed on top, and rivets are used to connect the base and housing through four mounting holes. Finally, the internal thread of the mounting block is screwed into the external thread at the upper end of the mandrel. This invention effectively reduces the vibration level of the fan, ensuring safe operation of the fan.

The utility model discloses a metal rubber pipe convenient to bend, which comprises a pipe body, a plurality of round bodies are arranged on the pipe body, angle adjusting assemblies are arranged on the round bodies, the metal rubber pipe convenient to bend is provided with a rotating disc, a bolt, a connecting rod and a rubber block, and when the pipe body needs to be bent, the rotating disc, the bolt, the connecting rod and the rubber block are connected through the rotating disc. According to the pipe bending device, the rotating disc rotationally installed on the round body is rotated, the connecting rod installed on the rotating disc drives the rubber block to conduct angular motion, the rubber block drives the pipe body to be bent at a section of position, then the bolt is rotated to be close to the round body, the rotating disc is fixed to the round body, and then the bent pipe body is fixed.

The invention discloses an anti-beam-falling multistage self-emergency protection inhaul cable and an emergency anti-beam-falling protection method thereof. A bridge lacks multiple processing modes related to anti-beam-falling processing. The top side of a steel sleeve is fixedly connected to the bottom face of a box girder body through a connecting cushion block, a support is vertically arranged on the outer side wall of a bridge pier, a built-in stranded wire assembly is arranged in a connecting pipe in a penetrating mode, a first metal rubber block is arranged on the outer wall of one end of the steel sleeve, and the outer side of a second metal rubber block is arranged on the inner wall of the other end of the steel sleeve. One end of the connecting pipe is connected with the support, the other end of the connecting pipe sequentially penetrates through the steel sleeve, the first metal rubber block and the second metal rubber block and then is connected with the first limiting head, and the connecting pipe is fixedly sleeved with a middle limiting steel ring; according to the method, the connecting cushion block, the steel sleeve, the connecting pipe, the built-in stranded wire assembly, the first limiting head, the support, the middle limiting steel ring, the first metal rubber block and the second metal rubber block are matched with one another to achieve the two-stage emergency protection process when the box girder body tends to fall down.

The invention discloses a temperature-resistant heat-insulation sealing metal-rubber composite material which comprises a metal phase, a rubber phase and a binder, the preparation method of the temperature-resistant heat-insulation sealing metal rubber composite material comprises the following steps: step 1, sintering and molding metal fibers to obtain a three-dimensional porous metal framework; 2, fluororubber and silicone rubber are added into an internal mixer to be blended, then hollow glass beads and carbon black are sequentially added, the mixture is mixed to be uniform, and rubber mixed rubber is prepared; 3, the surface of the metal framework is coated with a binding agent, the binding agent is covered with the rubber compound, and the whole material is placed in a vulcanizing machine to be vulcanized; and 4, integrally transferring the vulcanized material into a drying oven for secondary vulcanization, and cooling to obtain a composite material finished product. The composite material is applied to the field of space flight and aviation. The invention aims to solve the problems of narrow temperature resistance range, non-ideal heat insulation effect and obvious reduction of high-temperature mechanical properties of the existing material, so as to meet the use requirements of aerospace equipment in a complex thermal coupling environment.

The invention relates to the technical field of track shock absorbers, in particular to a floating slab vibration isolator for a liquid rubber composite track, which comprises an upper seat plate, a lower seat plate and a middle partition plate, an upper rubber body is arranged between the upper seat plate and the middle partition plate, an upper hydraulic cavity is formed between the upper rubber body and the middle partition plate, and a lower rubber body is arranged between the lower seat plate and the middle partition plate. A lower hydraulic cavity is formed between the lower rubber body and the middle partition plate, damping liquid is arranged in the upper hydraulic cavity and the lower hydraulic cavity, the damping liquid in the upper hydraulic cavity and the damping liquid in the lower hydraulic cavity can flow mutually, a containing cavity used for containing the upper rubber body is formed in the upper base plate, and a ventilation cavity is formed between the top wall of the upper rubber body and the cavity top wall of the containing cavity. A plurality of ventilation holes located above the ventilation cavity are formed in the upper seat plate, and the lower rubber body comprises an upper supporting body, a lower cover body and a middle hydraulic body. According to the vibration isolator in the scheme, metal, rubber and a flow channel structure are optimally designed, so that the ratio of dynamic stiffness to static stiffness is adjustable, and liquid sealing is reliable.

The invention provides a wind power elastic supporting device convenient to disassemble. The wind power elastic supporting device comprises a main body mechanism and a supporting mechanism. The main body mechanism comprises a lower bottom plate, a stand column and a cross beam, clamping blocks are integrally formed at the bottom of the cross beam at equal intervals, key grooves are formed in the top of the lower bottom plate at equal intervals, the clamping blocks of the stand column are clamped with the lower bottom plate through the key grooves, and first bolts are in threaded connection with one side of the stand column at equal intervals; the supporting mechanism comprises a metal rubber composite conical spring, the two ends of the metal rubber composite conical spring are fixedly connected with connecting plates, and the two connecting plates are attached to the lower bottom plate and the cross beam correspondingly. The split type design of the cross beam, the stand columns and the lower bottom plate is adopted, all the components are connected through the high-strength first bolts and the screws, disassembly transportation and on-site rapid assembly are facilitated, the key grooves and the clamping blocks are arranged at the connecting positions, the assembly alignment precision is ensured, and meanwhile component dislocation during disassembly is avoided.

The application relates to a high-order nonlinear friction-based metal rubber material hysteresis dynamics modeling method, which comprises the following steps: constructing a high-order nonlinear friction force model according to the contact form and spatial angle distribution of metal wires in the metal rubber; constructing a traditional dynamics model; substituting the high-order nonlinear friction force model into the traditional dynamics model to construct a high-order nonlinear friction-based metal rubber hysteresis dynamics model; performing parameter identification on the metal rubber hysteresis dynamics model; constructing an error model to represent the error of the test results affected by the dynamics model; performing parameter identification on the error model to determine the optimal number of model terms that should be included in the model, and completing the determination of the error model; completing error model parameter optimization, and completing model construction according to the model correlation coefficient of the high-order nonlinear metal rubber hysteresis dynamics model based on the error model. The method is beneficial to the establishment of a metal rubber dynamics model with high precision and universality.

The invention relates to the technical field of rail transit metal rubber shock absorber recycling and remanufacturing, in particular to a method for heating and recycling a metal framework in a pressurized state, which comprises the following steps: S1, a metal rubber composite shock absorber to be treated is mounted on a recycling tool, and the recycling tool comprises a heating device; s2, vertical pressure or axial torsional force is applied to a metal core shaft of the to-be-treated metal-rubber composite shock absorber through a pressurizing rod of the recovery tool, and meanwhile, a heating device is started, so that a metal framework of the metal-rubber composite shock absorber is stripped from a rubber body; and S3, glue cleaning operation is conducted on the surface of the metal framework, and glue cleaning operation is conducted on the recovery tool. According to the method for recycling the metal framework in the scheme, heating can be conducted while pressurizing is conducted, and the stripping efficiency of rubber and the metal framework can be improved.

The present application relates to a kind of aero-engine metal rubber damping support, support body, metal damping rubber wire, metal damping rubber strip and damping ring assembly;Variable stiffness support base features are realized by forging, mainly including U-shaped stiffener, corner protrusion, with the smaller contact area of the mounting edge and clamp of machine case, different areas of variable cross-sectional dimension and the reserved metal damping rubber setting area.Metal rubber is prepared, and metal rubber is pressed into shape according to the reserved size on variable stiffness support base.The pressed metal rubber is welded on the variable stiffness support base.The small assembly of bow type damping spring, metal damping rubber wire, damping inner ring, damping outer ring is assembled by temperature difference assembly method in the two through holes of support body support structure.The present application can meet the damping function requirement of aero-engine external system pipeline to support, and can solve the problem that traditional pipeline support cannot be damped.

The invention discloses a glass raw material impurity removal system for float glass production, and relates to the technical field of glass impurity removal. The device comprises a material blocking barrel, a concave rotating disc, a material returning mechanism, a conveying net belt, a powder guiding groove and a multi-cavity collecting box body. After glass raw materials fall into the downwards-concave rotating disc through the funnel, preliminary separation is achieved under the action of centrifugal force, and the disc body is kept cooled under the action of the heat dissipation blades; part of particles enter the conveying mesh belt through the feeding channel, the glass powder is separated through the powder guide groove, and large particles are cast in an accelerated mode along with the conveying mesh belt. Materials with different densities fall into different cavities of the collection box body under the action of air resistance and inertia, and efficient partition collection of glass, metal, rubber and the like is achieved.

The invention discloses a vibration damper based on particle damping and metal rubber mixing, and relates to the field of vibration absorbers. An existing shock absorber is limited in shock absorption effect and cannot be used in a more complex environment. The device comprises an elastic plate and a vibration cavity filled with metal rubber and damping particles, an insertion opening is formed in the side wall of the vibration cavity, the elastic plate is partially inserted into the vibration cavity from the insertion opening of the vibration cavity and is supported by the insertion opening of the vibration cavity, and the length, located in the vibration cavity, of the elastic plate is larger than the length, located outside the vibration cavity, of the elastic plate. When the end, located outside the vibration cavity, of the elastic plate is subjected to vibration force and swings up and down, the end, located in the vibration cavity, of the elastic plate swings reversely, and the metal rubber and the damping particles are stirred, so that the vibration amplitude of the metal rubber and the damping particles is increased. The vibration absorber is mainly used for absorbing vibration.

A kind of anti-falling beam multistage self-emergency protection cable. Multiple processing methods are lacking in bridge related anti-falling beam processing. In the utility model, the top side of the steel sleeve is fixedly connected to the bottom surface of the box girder body through the connecting cushion block, the support is vertically arranged on the outer side wall of the pier, the built-in wire assembly is arranged in the connecting pipe, the first metal rubber block is fixedly connected to the outer wall of one end of the steel sleeve, the outer side of the second metal rubber block is fixedly connected to the inner wall of the other end of the steel sleeve, one end of the connecting pipe is connected to the support, the other end of the connecting pipe is sequentially connected to the first limiting head after passing through the steel sleeve, the first metal rubber block and the second metal rubber block, the middle limiting steel ring is fixedly sleeved on the connecting pipe, when the steel sleeve moves away from the pier with the box girder body, the middle limiting steel ring is tightly attached to the first metal rubber block, when the steel sleeve moves away from the pier again with the box girder body, the second metal rubber block is tightly attached to the first limiting head.

The invention relates to the technical field of structural material high-performance calculation and numerical simulation, and discloses a metal rubber random vibration damage and fatigue life prediction heterogeneous parallel method which comprises the following steps: inputting finite element model data of a large-scale metal rubber component; a stiffness matrix, a mass matrix and the like are subjected to accelerated calculation by adopting a CPU multi-thread parallel technology, a frequency response function is calculated by combining a multi-process and multi-thread parallel technology, and random vibration response and component fatigue damage based on a frequency domain method are efficiently calculated by utilizing a GPU parallel computing technology. According to the method, a random vibration theory, a frequency domain fatigue analysis method and a finite element calculation method are combined, and meanwhile, multi-process, multi-thread and GPU heterogeneous parallel calculation frameworks are integrated, so that the calculation efficiency is remarkably improved, efficient analysis of random vibration response and fatigue life prediction of the vibration reduction component made of the complex structural material is realized, and the method is suitable for large-scale popularization and application. And an efficient strategy is provided for design optimization and safe service in the fields of aerospace, high-end equipment and the like.

The invention belongs to the field of sealing materials, and discloses a high-pressure-resistant hydrogen embrittlement-resistant metal rubber composite sealing material and a preparation method thereof. The high-pressure-resistant and hydrogen-embrittlement-resistant metal rubber composite sealing material comprises a titanium alloy base material, a metal rubber layer and a metal rubber layer which are sequentially stacked from bottom to top, the titanium oxide layer is generated on the surface of the titanium alloy base material in situ; and the rubber layer is adhered to the surface of the titanium oxide layer through hot pressing treatment. The invention further discloses a preparation method of the high-pressure-resistant and hydrogen-embrittlement-resistant metal rubber composite sealing material, and the hydrogen-embrittlement-resistant metal rubber composite sealing material which can still keep stable deformation in a high-pressure environment is prepared by constructing the hydrogen-inhibiting oxidation layer and combining surface roughening, laser irradiation treatment and hot pressing treatment. After the high-pressure-resistant and hydrogen-embrittlement-resistant metal rubber sealing material is kept in a 100 MPa high-pressure hydrogen environment for 1000 hours, the tensile strength retention rate is larger than or equal to 88%, the percentage elongation retention rate after fracture is larger than or equal to 80%, and the deformation is smaller than or equal to 0.5%.

The invention discloses a secondary self-emergency anti-beam-falling device for a bridge and a protection method, and relates to the technical field of roads and bridges. The bridge pier anchor fixing part is fixedly connected to a bridge pier through an anchor bolt and hinged to the connecting support body through a hinge shaft, the steel strand restraining assembly is fixedly connected to the outer side wall of the connecting support body, the beam bottom anchor fixing part is fixedly connected to the bottom of a box beam body through an anchor bolt, and the steel sleeve is fixedly connected with the beam bottom anchor fixing part through a bolt. The metal rubber efficiency assembly is arranged in the steel sleeve, the steel strand restraining assembly is connected into the steel sleeve in a penetrating mode, and the steel strand restraining assembly and the metal rubber efficiency assembly are matched to form a buffering-restraining anti-seismic device. Beam end impact is effectively restrained, relative displacement is limited, and reliable beam falling prevention constraint is provided; and through cooperative work of the metal rubber efficiency assembly and the steel strand constraint assembly, multi-stage protection of the bridge body under the earthquake action is achieved, and the overall anti-seismic toughness of the bridge is improved.

The invention discloses a machining method for a non-metal glue layer of an aero-engine case, and belongs to the technical field of aero-engine manufacturing. The machining method comprises the steps that a specific machining tool is selected based on the material characteristics of a non-metal glue layer of the aero-engine case; based on the material characteristics and the machining tool, machining parameters are set; based on the elastic resilience characteristic of the aero-engine case non-metal rubber layer, the pre-deformation amount is determined; based on the pre-deformation amount, the diameter of a nonmetal glue layer of the aero-engine case is increased before machining, and after coating and heating curing are completed, the machining tool is used for machining based on machining parameters. According to the method, the specific machining tool is selected, the machining parameters are set, the pre-deformation amount is determined, and machining is conducted in sequence, so that the problem that the machining size is difficult to accurately control due to the fact that the rubber layer is soft in material and large in elasticity can be systematically solved, the machining precision is effectively improved, and it is ensured that the non-metal rubber layer of the aero-engine case meets the design size requirement.