54results about How to "Dissipated more" patented technology

The invention discloses an energy-absorbing method based on a combined hybrid cross-linked dynamic polymer. The energy-absorbing method realizes energy absorption by using the combined hybrid cross-linked dynamic polymer containing at least two boron-containing dynamic covalent bonds and common covalent cross-linking formed by a common covalent bond. Through introduction of the boron-containing dynamic covalent bonds with different dynamic natures and combination of the boron-containing dynamic covalent bonds with the common covalent bond, polymeric materials of abundant structures and with awide controllable range and diversified properties can be prepared. Due to the difference between the different boron-containing dynamic covalent bonds in the dynamic polymer, the dynamic polymer canpresent hierarchical dynamic reversible effects, so the dynamic polymer shows good energy dissipation and energy absorption characteristics and has toughening, damping and impact-resisting effects onmaterials in specific structures. The dynamic polymer of the invention is applicable to the body protection of people in exercises and daily life, the body protection of the military police, explosionprevention, protection in airborne landing and aerial delivery, collision prevention of automobiles, anti-impact protection of electronic products and electric appliances, etc.

The invention relates to a vibration-proof building unit, in particular to a composite damping single-piston rod viscous damper. The damper is a single-piston rod viscous damper and is characterized in that: a piston rod (2) of the single-piston rod viscous damper passes through a left end cover (1) through a working cylinder (10) on the left of a piston (5); a cylindrical spiral spring (60 is arranged in the working cylinder (10) on the right of the piston (5); one end of the spring is fixed on a right end cover (7), while the other end is fixed to the end face of the piston (5); an outer cylinder barrel (4) is sleeved outside an inner cylinder barrel (3) of the working cylinder (10); the left end cover (1) and the right end cover (7) are respectively arranged at two ends of the outer cylinder barrel (4), so that a gap between the inner cylinder barrel (3) and the outer cylinder barrel (4) forms a compensation cylinder (11); one one-way valve (13) is arranged in the body of the left end cover (1); and another one one-way valve (12) is arranged in the body of the right end cover (7). The viscous damper can simultaneously provide viscous damping and elastic damping in the whole moving process of the piston.

The invention discloses a dynamic polymer with a hybrid cross-linked network. The dynamic polymer contains common covalent cross-linking and dynamic covalent organic borate bonds. The dynamic polymerintegrates the respective advantages of the dynamic covalent organic borate bonds and the common covalent cross-linking, and polymeric materials of abundant structures and with diversified propertiescan be prepared by regulating the structures of reactants. The high dynamic reversibility of the dynamic covalent organic borate bonds in the dynamic polymer allows the polymer to present the functional characteristics of stimulation responsiveness, self repair performance; the common covalent cross-linking endows the dynamic polymer with certain strength and stability; moreover, based on the dynamic nature of the dynamic organic borate bonds, the dynamic polymer has the characteristics of energy dissipation and energy absorption and the good functions of damping, shock absorption, sound insulation, impact resistance, high toughness and the like. The dynamic polymer can be used for preparing damping and buffering materials, anti-impact protection materials, self-repairing materials, toughmaterials, force transducers, etc.

The invention provides a shearing type buckling-restrained energy dissipation brace which has similar tension and compression stiffness, can be mounted and manufactured easily and conveniently, is low in manufacturing cost and comprises a core steel plate, two outer-layer steel plates and bolts. The two outer-layer steel plates are respectively placed on two sides of the core steel plate, mounting connecting sections and steel plate connecting sections are arranged at two ends of the core steel plate, an energy dissipation section is arranged in the middle of the core steel plate, open slots are formed in two ends of the energy dissipation section, deformation holes which are regularly arrayed are formed in positions between the open slots in the two ends of the energy dissipation section, core bolt holes are formed in the steel plate connecting sections, outer-layer bolt holes which are matched with the core bolt holes are formed in the outer-layer steel plates, and the bolts are connected with the core steel plate and the outer-layer steel plates by the core bolt holes and the outer-layer bolt holes. The shearing type buckling-restrained energy dissipation brace has the advantages that the deformation holes which are regularly arrayed are formed in the energy dissipation section of the core steel plate, so that energy can be dissipated, and the shearing type buckling-restrained energy dissipation brace has the similar tension and compression stiffness; the mounting connecting sections and the steel plate connecting sections are arranged at the two ends of the core steel plate, and accordingly the shearing type buckling-restrained energy dissipation brace can be manufactured and mounted conveniently.

In one embodiment, the present invention is a heat sink apparatus comprising a heat sink device and a heat sink shroud. The heat sink device is for transferring heat from a heat source. The heat sink shroud is thermally coupled with the heat sink device. Hence, the heat sink shroud transfers heat from the heat sink device and dissipates the heat generated by the heat source.

The invention belongs to the earthquake resistance and energy-dissipation earthquake-reduction of engineering structure technical field, and particularly relates to a buckling restrained brace with viscoelastic materials. The buckling restrained brace with the viscoelastic materials comprises core plates, an outer sleeve, the viscoelastic materials, steel plates, bolt holes and non-bonding materials, wherein the outer sleeve is arranged on the periphery of the core plates; the steel plates are arranged on the end portions of two ends of the outer sleeve; the viscoelastic materials are filled between the steel plates and the core plates; and the bolt holes are arranged on both sides of the core plates and used for connecting with an outer framework structure. Once relative displacement occurs between the outer sleeve and the core plates, the viscoelastic materials begin to dissipate energy, and therefore the defect that a traditional buckling restrained brace does not dissipate energy under a small earthquake can be overcome; under the same big deformation condition, the buckling restrained brace with the viscoelastic materials has a bigger energy-dissipation capacity than the traditional buckling restrained brace due to the viscoelastic materials and the buckling restrained brace dissipate energy together. The buckling restrained brace with the viscoelastic materials is clear in earthquake resistance conceptual design, simple in structure construction, low in cost of used materials, and convenient to construct and replace.

The invention relates to an adjustable damping type vibration-attenuation and chatter-suppression device in the milling process of thin-walled workpieces and a vibration-attenuation method. According to a conventional vibration-attenuation device for thin-walled workpieces, the functions of suppressing blade chatter and attenuating vibration are majorly achieved by modifying and optimizing machining tools, work fixtures and machining cutters or positioning the cutters, arranging machining processes and the like; but the effects are unsatisfactory or limited, and economic input is often large. The adjustable damping type vibration-attenuation and chatter-suppression device in the milling process of the thin-walled workpieces comprises a vibration-attenuation and chatter-suppression unit (9) which comprises a seal chamber (8); a top plate (1) is mounted on the upper plane of the seal chamber; the outer layer of the seal chamber is a restraint layer (7) which is internally provided with a damping layer (6); a damping layer base plate (5) is mounted inside the damping layer and contains magnetorheological fluid (3) inside; six permanent magnets (2) are mounted in the magnetorheological fluid (3); and a coil (4) is wound outside each permanent magnet. The adjustable damping type vibration-attenuation and chatter-suppression device is used in the milling process of the thin-walled workpieces.

The invention provides a method and system for protecting trains against collisions. According to the method and system, the mode that a train hook energy absorbing structure, an anti-crawling energy absorbing structure and a train deformation energy absorbing structure act successively is not adopted any more, but the anti-crawling energy absorbing structure acts firstly. The length of an energy absorbing pipe in the system for protecting the train against collisions is not limited by the position of train hooks any more, so that the length of the energy absorbing pipe is significantly increased, energy absorbed by the anti-crawling energy absorbing structure can be significantly improved compared with the prior art, more collision kinetic energy can be dissipated when collisions happen, and the safety of the trains is remarkably improved. According to the anti-crawling energy absorbing structure, the energy absorbing ratio is large, the effective travel is long, the influence of load conditions on deformation is small, and the energy absorbing characteristic under different collision conditions is stable. When the energy absorbing structures are triggered by accident, a telescopic drive structure can drive the energy absorbing pipe to retract back into a train body conveniently in a direct one-key control mode, and the effect that the trains can be normally coupled through the train hook is ensured.

Provided is a four-bottom three-cavity injector. A bearing seat and gas top cover integrated piece and a belt ring three-bottom and fuze integrated piece form a gas chamber; a chamber jointly definedby the belt ring three-bottom and fuze integrated piece and a belt ring two-bottom jointly is an oxidant chamber, an oxidant inlet section is an inlet of an oxidant and is communicated with an oxidantcollector, and the oxidant inlet section is provided with a flow deflector that divides an incoming flow oxidant into two strands that flow into the two sides of the oxidant collector respectively. Achamber defined by a belt ring two-bottom and a one-bottom is a fuel chamber, a fuel inlet section is a fuel inlet and is communicated with a fuel collector, and the fuel inlet section is provided with a flow deflector that divides incoming flow fuel into two strands that flow into the two sides of the fuel collector respectively; and nozzle assemblies are mounted on the belt ring three-bottom and fuze integrated piece, the belt ring two-bottom and the one-bottom. The gas chamber, the oxidant chamber and the fuel chamber are sequentially distributed from top to bottom.

The invention discloses an assembled frame system with a concrete filled steel tube branch limb combined special-shaped column and a shock absorption wall and belongs to the field of building structure techniques and earthquake resistance and shock absorption of structures. The system primarily comprises a round concrete filled steel tube long column welded steel batten plate, and a prefabricatedcorner column, a prefabricated side column, a prefabricated middle column, a reinforced concrete beam, a steel plate wall, a prefabricated steel floorslab, a column-column connecting sleeve, a column-beam anchoring part, a middle column-beam anchoring part, a beam-plate connecting part, ECC post-cast strips and the like prepared by pouring concrete outside. Upper and lower concrete filled steel tubes are connected through the column-column connecting sleeve, and the column-beam anchoring part, the middle column-beam anchoring part and the round concrete filled steel tube long column are connected and prefabricated through dowels, so that the beam-column node connecting performance is enhanced. The ECC post-cast strips are arranged at two ends of the beam and the wall and are poured up anddown in a penetrating manner, so that the energy consumption ability and the anti-earthquake performance of the structural system are improved. The assembled frame system achieves the functions of hiding column edges and being attractive in building, a project is simple and rapid to construct, the construction efficiency is high, the nodes are connected stably and reliably, and the structural system is good in anti-earthquake performance.

The invention discloses a dynamic polymer composition with a hybrid structure. The dynamic polymer contains at least one common covalently cross-linked network with a carbon heterochain as a skeletonand with hydrogen bond groups on its chain backbone; and the dynamic polymer further contains dynamic covalent inorganic silicon borate bonds. Common covalent cross-linking endows the polymer with certain strength and stability. The existence of the inorganic silicon borate bonds allows the polymer to have good dynamic reversibility, present functional characteristics like stimulation responsiveness, exert good energy-absorbing effect and realize toughening and damping of materials in specific structures. The dynamic polymer composition can be used for preparing damping and buffering materials, shock-resistant protection materials, self-repairing material, tough materials, etc.

The invention relates to a speed amplification type viscous damping wall. The speed amplification type viscous damping wall comprises a locating beam. A straight rack is fixed to the bottom end of thelocating beam. The straight rack is movably connected with a gear through a gear structure. The gear is fixed to the interior of a box through a gear pin shaft. The box is located below the gear andprovided with a plurality of shear plates. Each shear plate is fixedly connected with the gear. The box is filled with damping fluid. In case of inter-story displacement, the straight rack drives thegear and the shear plates to rotate through the gear structure, and the shear plates shear the damping fluid when moving in the box. If inter-story displacement occurs in the direction perpendicular to the plane, slippage occurs to the straight rack and the gear, the shear plates does not move in the box, and then the damping wall is protected against damage to shear force. If the inter-story displacement occurs at an angle with the plane, the straight rack and the gear decompose motion into motion in plane and motion perpendicular to the plane. Under the condition of not damaging the dampingwall, energy of an earthquake or wind is dissipated to achieve the purpose of protecting a building.

The invention relates to a power generator set. The power generator set comprises an engine, a power generator providing electric energy for the engine and a soundproof cover with a soundproof function and a protective function. The soundproof cover is provided with a functional opening and a silencing component located inside the functional opening. The silencing component is provided with a functional channel of a labyrinth structure. According to the power generator set, by arranging the silencing component of the special structure, in combination with the optimization of the structural parameter of the silencing component, the sound absorption area is increased beneficially, the transmission path of noise is prolonged beneficially, noise can form multiple reflections in the noise channel beneficially, more energy is dissipated, the silencing effect is better, dust blockage is facilitated, on the premise of guaranteeing that the silencing component meets normal intake and exhaust requirements of the engine and meeting the heat dissipation performance of the power generator set, the noise reduction of the noise within the wide band range (such as 50-6300Hz) is increased, outwardnoise radiation is reduced, and noise of the power generator set is lowered.

The invention discloses a dynamic polymer with a hybrid cross-linked structure. The dynamic polymer contains at least one common covalently cross-linked network with a carbon chain or carbon heterochain as a skeleton, and further contains dynamic covalent inorganic silicon borate bonds. Common covalent cross-linking endows the polymer with certain strength and stability. The existence of the inorganic silicon borate bonds allows the polymer to have good dynamic reversibility, present functional characteristics like stimulation responsiveness, exert good energy-absorbing effect and realize toughening and damping of materials in specific structures. The dynamic polymer can be used for preparing damping and buffering materials, anti-impact protection materials, self-repairing materials, toughmaterials, force transducers, etc.

The invention discloses a frame system comprising a prefabricated steel tube concrete combined special-shaped column and an energy-consuming steel plate wall. The system mainly comprises prefabricatedcorner columns, prefabricated side columns and prefabricated middle columns, H-shaped steel beams, the energy-consuming steel plate wall with elliptical holes, prefabricated steel floors, column-column connection flanges, column-column connection rubber pads, column-beam connection parts, middle column-beam connection part, column-wall connection parts and the like, wherein the prefabricated corner columns, prefabricated side columns and prefabricated middle columns are made of circular steel tube concrete columns and steel batten plates; the column-column connection flanges, the column-beamconnection parts, the middle column-beam connection parts and the column-wall connection parts are welded and prefabricated with steel pipes; the structural parts are connected by high-strength bolts.A rubber pad is placed between the upper and lower columns to connect the flanges to enhance the connection. Energy-consuming steel wall and steel slabs open holes to improve the energy consumption and seismic performance of the structural system. The invention realizes full dry construction, no wet operation, simple and quick construction engineering, high construction efficiency, stable and reliable node connection, and good seismic performance of the structural system.

The invention discloses a connecting structure of a steel pipe column and a steel beam. A connecting component comprises at least one connecting plate, one side of the connecting plate is used for being attached to the steel pipe column, the other side is used for being connected with an end plate of the steel beam, the end plate is provided with a through hole, the connecting plate is provided with a first threaded hole, the first threaded hole is matched with a unilateral bolt, the unilateral bolt sequentially penetrates through the end plate, the connecting component and the steel pipe column wall, the threaded part of the unilateral bolt is sequentially matched with the first threaded hole and a second threaded hole pre-formed in the steel pipe column, and the connecting component is matched with the unilateral bolt to enable the steel beam to be connected with the steel pipe column and to be fixed. The connecting component plays a role of connection and is also an enhancing component at the same time, through the connecting component, the anchoring length of the bolt, the thickness of the steel pipe column wall and the effective thickness of the outer side of the beam end plate are increased, the anti-deformability of the end plate outside the beam and the steel pipe column is improved, and the anchoring length of the bolt is increased.

The invention discloses a toughening method for a cement-based material. The method comprises the following steps of selection of raw materials, design of a mixing ratio and mixing of the raw materials. The selection of the raw materials further comprises the following steps of gel material selection, fine aggregate selection, coarse aggregate selection, polymer selection, fiber selection and water reducing agent selection. According to the method, a composite technology for industrial waste residues, fibers, polymers and cement clinker is adopted, the performance of each composition with different chemical components is superposed in a structure forming process, the compositions gradually play a role step by step at the corresponding performance level, and the effect of complementing advantages is achieved; the capacity of reinforcing and toughening a cement matrix is greatly improved .The high-performance cement-based composite material with the strength grade of 60 MPa is prepared,and the bending toughness and fracture performance of the material are improved.

The invention provides a combined buckling and energy-consumption preventing support similar in tension and compression rigidity, simple and convenient to mount and manufacture and low in manufacturing cost. The combined buckling and energy-consumption preventing support comprises a kernel steel plate and an outer steel bushing and is characterized in that mounting and connecting sections are arranged at two ends of the kernel steel plate, an energy consumption section is arranged in the middle of the kernel steel plate, open slots are formed in two ends of the energy consumption section, deformation holes in regular array are formed the open slots in two ends of the energy consumption section, the outer steel bushing wraps the energy consumption section, filling materials are filled between the outer steel bushing and the energy consumption section, and energy consumption materials are filled in the open slots and / or the deformation holes. By the arrangement of the deformation holes in regular array in the energy consumption section of the kernel steel plate, seismic energy can be dissipated, and the tension and compression rigidity can be similar; manufacturing and mounting can be facilitated by the mounting and connecting sections and the steel plate connecting sections arranged at the two ends of the kernel steel plate.

The invention relates to a reinforced concrete vibration-isolated foundation. The reinforced concrete vibration-isolated foundation comprises a ring-shaped foundation, high-elasticity reinforcing steel bars, a cup-mouth steel plate, anchoring pins, a steel cover plate, a limiting baffle bar, sealing grease, buffer cushions, a damping filling material, positioning holes, nuts, injection holes and column joint bars, wherein the ring-shaped cavity of the foundation is filled with the damping filling material to achieve the energy-dissipating damping effect. According to the reinforced concrete vibration-isolated foundation, the foundation in the conventional vibration-isolated foundation and a vibration-isolated supporting base are integrated to achieve the dual functions of foundation stress and vibration isolation, so that relatively great uplift force can be borne; the reinforced concrete vibration-isolated foundation has capacity of damping energy dissipation, can be limited and automatically returned, can obtain required horizontal stiffness by adopting different working modes, and can realize the vibration-isolating effect without mounting the vibration-isolated supporting base, so that the engineering cost can be reduced, and the building space can be saved.

The invention discloses an energy absorption structure optimization method taking an expected force response process as a target, and the method comprises the steps: setting a proper expected force response curve, continuously updating the value of a target function in an optimization process in an iteration mode so as to obtain a new finite element model, and enabling an actual force response curve of a structure to be gradually close to the expected force response curve. And the energy absorption capacity of the structure is improved. According to the method, the deformation mode of the thin-walled tube can be changed, low-energy-absorption Euler deformation is changed into high-energy-absorption progressive buckling deformation, and multiple energy absorption evaluation indexes can be improved at the same time. The optimized actual force response curve of the thin-walled tube is closer to the expected force response curve. The energy absorption component obtained through the methodcan generate an ideal deformation mode, more impact kinetic energy is dissipated, and great guiding significance is achieved for design of energy absorption devices of various vehicles.

The invention discloses an assembly type anti-buckling supporting component with a negative-poisson-ratio structure and a manufacturing method. The assembly type anti-buckling supporting component comprises an energy consumption core plate and an external constraint unit. The energy consumption core plate is an energy consumption core plate with the negative-poisson-ratio periodic porous structure, and is formed by negative-poisson-ratio cells, and the types of the negative-poisson-ratio cells include single-layer and multi-layer star types, concave hexagon types and criss-cross oval types. The core portion of the energy consumption core plate is connected with the external constraint unit through a non-sticky material. The relationship of the ratio of the length L of the energy consumption core plate to the height H of the energy consumption core plate meets the inequation L / H is larger than 15.45 and smaller than 17.02. The relationship of the ratio of the thickness t1 of the external constraint unit to the thickness t2 of the energy consumption core plate meets the inequation t2 / t1 is larger than 0.18 and smaller than 0.41. Due to the existence of the core plate with the negative-poisson-ratio structure, the assembly type anti-buckling supporting component can be kept in an elastic state under the action of small earthquakes, and a certain lateral rigidity can also be provided for the structure.

The invention discloses an anti-penetration material and a preparation method and application thereof.The anti-penetration material comprises an upper coating (1), a restraint layer (2), a ceramic layer (3), a supporting layer (4), an energy dissipation layer (5), an energy absorption layer (7) and a lower coating (8) from outside to inside, the energy dissipation layer (5) comprises a composite material A and a composite material B, the composite material A is a high-performance fiber-shear thickening fluid composite material, and the composite material B is a high-performance fiber-shear thickening fluid composite material. The composite material B comprises at least one of a high-performance fiber-graphene composite material and a high-performance fiber-graphene derivative composite material. According to the anti-penetration material, the composite armor is designed by comprehensively considering factors such as protection performance and maneuverability, the surface density and thickness of a protection structure can be effectively reduced, and penetration damage is limited within a small range.

The invention relates to a compound vibration isolating device based on an air spring and a particle damping material. The compound vibration isolating device comprises an air spring component, a particle damping component and a metal spring, wherein the particle damping component comprises a particle holding chamber with throttling holes and particles; the air spring component comprises an air filling hole, a top plate, an air bag layer and a bottom plate; the upper part and the lower part of an elastic component are separately connected with the top plate and the particle holding chamber through welding, or bolts and other technologies; the lower part of the particle holding chamber is connected to the bottom plate through gluing or bolts; and as a result, a whole compound vibration isolating device based on the air spring and the particle damping material is formed. According to the compound vibration isolating device, through changing the particle holding chamber into an additional air chamber, the whole size is greatly reduced than adopting an air spring with an external air chamber; and at the same time, through combining the air spring component, the particle damping component and the metal spring together, the compound vibration isolating device is integrated with the vibration isolating function of the air spring with the air chamber, the energy consuming function of the particles and the vibration isolating function of the metal spring, so that the compound vibration isolating device better buffers the power impact of upper load, consumes vibration energy, reduces noise and has a great vibration isolating effect when excitation frequency is lower than 20Hz.

The invention discloses an X-shaped T-shaped connecting component. The X-shaped T-shaped connecting component comprises a rectangular web and an X-shaped flange plate, wherein the X-shaped flange plate is provided with a long symmetric axis and a short symmetric axis; bolt holes are formed in the two sides of the X-shaped flange plate and are symmetrically arranged by taking the long symmetric axis as the center; the rectangular web is fixedly arranged on the long symmetric axis of the X-shaped flange plate; 2n energy-consuming holes are formed in the X-shaped flange plate; every two energy-consuming holes are symmetrically arranged by taking the long symmetric axis as the center; the n energy-consuming holes in the same side of the rectangular web are symmetrically arranged by taking the short symmetric axis as the center; the outlines of the cross sections of the energy-consuming holes are closed curves which are in continuous smooth transition; the energy-consuming holes are positioned between the bolt holes and the rectangular web; the distance between the energy-consuming holes and the rectangular web is more than or equal to 1.5 times the thickness of the rectangular web; the smallest distance from the bolt holes to the energy-consuming holes should not be less than 2 times the thickness of the X-shaped flange plate. The invention provides a manufacturing process of the X-shaped T-shaped connecting component. The X-shaped T-shaped connecting component can effectively prevent connection damage caused by concentrated stress, and is good in energy-consuming ability and economy.

A high damping graphene / polymer composite material and a preparation method thereof, the invention relates to the application field of graphene materials, in particular to a high damping graphene composite material and a preparation method thereof. Using graphene or graphene oxide as raw material, hollow spherical graphene is obtained by spray drying, electrostatic spray freeze drying, template etching and other methods. The spherical graphene is dispersed in the epoxy resin curing agent, and the graphene / epoxy curing agent composite system in which the spherical graphene is uniformly dispersed is obtained by simple mechanical stirring or ultrasonic treatment. The spherical graphene / epoxy resin curing agent composite system is added to the epoxy resin, and the epoxy resin composite system in which the spherical graphene is uniformly dispersed can be obtained by mechanical stirring and defoaming treatment after curing. The spherical graphene / epoxy resin composite material of the invention effectively combines the excellent properties of the epoxy resin itself, and effectively improves the damping performance of the epoxy resin by regulating the interaction between the hollow spherical graphene and the epoxy resin molecular chain. Mechanical strength and thermal stability.

The invention provides a combined buckling and energy-consumption preventing support similar in tension and compression rigidity, simple and convenient to mount and manufacture and low in manufacturing cost. The combined buckling and energy-consumption preventing support comprises a kernel steel plate and an outer steel bushing and is characterized in that mounting and connecting sections are arranged at two ends of the kernel steel plate, an energy consumption section is arranged in the middle of the kernel steel plate, open slots are formed in two ends of the energy consumption section, deformation holes in regular array are formed the open slots in two ends of the energy consumption section, the outer steel bushing wraps the energy consumption section, filling materials are filled between the outer steel bushing and the energy consumption section, and energy consumption materials are filled in the open slots and / or the deformation holes. By the arrangement of the deformation holes in regular array in the energy consumption section of the kernel steel plate, seismic energy can be dissipated, and the tension and compression rigidity can be similar; manufacturing and mounting can be facilitated by the mounting and connecting sections and the steel plate connecting sections arranged at the two ends of the kernel steel plate.

The invention relates to a vibration-proof building unit, in particular to a composite damping single-piston rod viscous damper. The damper is a single-piston rod viscous damper and is characterized in that: a piston rod (2) of the single-piston rod viscous damper passes through a left end cover (1) through a working cylinder (10) on the left of a piston (5); a cylindrical spiral spring (60 is arranged in the working cylinder (10) on the right of the piston (5); one end of the spring is fixed on a right end cover (7), while the other end is fixed to the end face of the piston (5); an outer cylinder barrel (4) is sleeved outside an inner cylinder barrel (3) of the working cylinder (10); the left end cover (1) and the right end cover (7) are respectively arranged at two ends of the outer cylinder barrel (4), so that a gap between the inner cylinder barrel (3) and the outer cylinder barrel (4) forms a compensation cylinder (11); one one-way valve (13) is arranged in the body of the left end cover (1); and another one one-way valve (12) is arranged in the body of the right end cover (7). The viscous damper can simultaneously provide viscous damping and elastic damping in the whole moving process of the piston.

The invention provides a conical damping hole type buffer for an undercarriage of a passenger plane. The conical damping hole type buffer comprises an external fastening connection assembly, an internal movable assembly and a separation part, wherein the external fastening connection assembly comprises an outer actuating cylinder, a travel plunger and a sealing device structure; the internal movable assembly comprises an inner actuating cylinder and a damping piston head; the separation part comprises a damping braking valve and an air chamber partition plate piston; a conical damping hole A is formed in the center at the bottom of the travel plunger; and a plurality of conical damping holes B are formed on the outer edge of the damping piston head uniformly along the axial direction. In the conical damping hole type buffer for the undercarriage of the passenger plane, the optimal buffer full-travel variable damping working condition is realized by designing conical angles of the conical damping holes and an area ratio of oil inlet / outlet end faces in a creative design method for the conical tubular damping holes. Simultaneously, compared with the conventional oil needle type design, the conical damping hole type buffer has the advantages that a structure is simpler and difficult to damage due to friction, impact and the like, and the manufacturing and maintenance cost is low.