33results about How to "Reduce the possibility of resonance" patented technology

The invention relates to a rubber spring damping shock absorber which is characterized by comprising high-damp rubber (1) and a column spiral compression spring (2), wherein the high-damp rubber (1) is fixedly connected with the column spiral compression spring (2), a lower base (3) and an upper base (4) by vulcanization. The shock absorbing effect of the shock absorber can reach 50% to 80%.

The invention relates to a method for inhibiting the vortex-excited oscillation of a submarine pipeline. The method comprises the following steps: (1) fabricating tongue-like flow-guiding sheets of different sizes and curvatures according to the inner and outer diameters of the submarine pipeline to be protected, allowing each sheet to be tapered from the bottom to the top, forming a square wave-shaped notch at the bottom edge of each sheet, fixing a Z-shaped trip wire on the outer wall of each sheet, and allowing the square wave-shaped notches of the sheets in pair to be engaged with each other; (2) assembling and fixing flow-guide shields on the submarine pipeline at a distance 1.5-2.5 times of the outer diameter of the submarine pipeline, wherein each flow-guide shield is formed by two flow-guide sheets by assembly and welding, forming two symmetric shell bodies with raised middle part and two interconnected top ends, so that the submarine pipeline is enclosed therein. The inventive method can efficiently control the vortex-excited oscillation and simultaneously control the construction complexity and cost in an acceptable range, and realizes the optimization of construction complexity, construction cost and inhibitory effect on vortex-excited oscillation.

The invention relates to an undersea pipeline guide cover which is a symmetrical shell which is connected by two convex tops in the middle. The invention is spliced by four tongue-shaped guide pieces which has the same size and bending radian; each guide piece is gradually thinned from the bottom edge to the top; the bottom edge is provided with a square-wave incision; the external wall of the guide piece is fixed with a Z-shaped torrent wire; the square-wave incision of each guide piece is matched with the square-wave incision of the guide piece which is spliced by the square-wave incision of the guide piece at the bottom edge. The invention also relates to a manufacture and fixing method of the guide cover. The manufacture and fixing method of the undersea pipeline guide cover which is provided by the invention effectively controls a vortex-induced vibration, has moderate complexity of the construction process, keeps the construction cost in an acceptable range, and realizes the optimization between the factors of process complexity, manufacture cost, the restriction effect of the vortex-induced vibration, etc.

The invention discloses a high-strength bathing chair, which comprises a back board, a seat board and four supporting legs. A horizontal rod is arranged at the top of the supporting legs, the seat board is arranged on the upper part of the horizontal rod, and the horizontal rod and the seat board are fixedly connected by bolts. ; The rear end surface of the backboard is connected with two parallel backrest rods, and the backrest rods are fixedly connected with the horizontal bar; the backboard and the seat board are provided with a number of water-permeable through holes; the supporting legs include inner pipes and outer The inner tube is sleeved in the outer tube and fixedly connected by bolts, and several positioning holes are arranged on the inner tube and the outer tube. The invention has the advantages that it can overcome the disadvantages of the prior art, and the structural design is reasonable and novel.

The invention aims at providing a diesel generator with a variable spring support and a vibration reducing control method of the diesel generator. The support can be automatically regulated along with the working condition of the diesel generator, and therefore the vibration reducing effect of the diesel generator is improved. The diesel generator comprises the support and a diesel generator body; the support is composed of a bottom plate, a support plate, a framework, springs, an air pump and an air bag, the bottom end of the framework is closed, and the top end of the framework is open; the bottom plate is movably installed on the lower portion of the framework, the support plate is supported over the bottom plate through the springs, and the diesel generator body is fixedly connected with the upper portion of the framework and located on the support plate; the air bag and the air pump are arranged under the bottom plate, and the top end of the air bag abuts against the bottom plate; the air pump is connected with the air bag to inflate or deflate the air bag; the air pump is provided with a control unit, the framework is provided with a height sensor used for detecting the height of the bottom plate, the diesel generator body is provided with a revolving speed sensor used for detecting the revolving speed of a crank shaft, and the control unit is connected with the height sensor and the revolving speed sensor.

The invention relates to a novel nonlinear earthquake reduction device. The novel nonlinear earthquake reduction device can effectively dissipate energy introduced by a body and introduce the energy into the earthquake reduction device in a one-way mode, broadband earthquake resisting is achieved, resonance damage is avoided, and the novel nonlinear earthquake reduction device has suitable rigidity and damping capacity, and is stable in performance, compact in structure, variable in frequency, controllable in damage and easy to manufacture. A vibration absorber is mainly a horizontal earthquake absorbing device, the whole structure is in a long-strip shape, and the novel nonlinear earthquake reduction device comprises end fixing members (1), connecting pre-embedded pieces (2), silica-gel damping mats (3), nonlinear rigid springs (4), steel tube sliding ways (5) and a NES vibrator (6). The novel nonlinear earthquake reduction device can be used for interlayer earthquake isolation and basic earthquake isolation of an engineering structure, and can also be used for earthquake isolation of a mechanical device.

The invention relates to a metal rubber damping shock absorber which is characterized by comprising an upper structure and a lower structure, wherein the lower structure comprises a lower base (7), a lower outer guide cylinder (6) and a lower inner guide cylinder (4); the lower outer guide cylinder (6) and the lower inner guide cylinder (4) are connected with a lower base (7), and a circular ring metal rubber material (5) is arranged between the lower outer guide cylinder (6) and the lower inner guide cylinder (4); and the upper structure comprises an upper base (2), an upper outer guide cylinder (3) and an upper inner guide cylinder (1), and the upper outer guide cylinder (3) and the upper inner guide cylinder (1) are connected with the upper base (2). The shock absorption effect of the shock absorber can reach 50%-80%.

The invention discloses a light-weight machine tool transverse beam with a reinforced arched rib plate. The reinforced arched rib plate is used inside the transverse beam, a plurality of longitudinal partition plates are symmetrically distributed with the middle surface of the transverse beam as the reference, and the section of the transverse beam is a rectangular section. The light-weight machine tool transverse beam with the reinforced arched rib plate solves the problem that due to a common reinforced rib plate inside a transverse beam, the rigidity is constant, and materials are redundant, rigidity of the middle of the transverse beam is improved, the dynamic characteristic of the transverse beam is improved, the weight of the transverse beam is reduced, and the light weight design is achieved. Due to the fact that the widely-used rectangular section is adopted for the section of the transverse beam, the transverse beam is simple in structure, and can be conveniently assembled with parts such as stand columns, carriages and the like.

The invention discloses a magnetic head folding tablets combination which comprises a loading rod provided with concave points, a cantilever ligule and a flexible component of a support board, and a magnetic head which is provided with a front part and a back part that is opposite to the front part. The flexible component is connected with the cantilever ligule. The magnetic head is arranged on the flexible component, thus the magnetic head is supported in the center of the magnetic head by the concave points. The front part is arranged at the cantilever ligule and the back part is arranged on the support board. A weight balancing structure is formed at the cantilever ligule of the flexible component, which leads the weight of the magnetic head folding tablets combination to keep balance between the part from the tail part to the magnetic head center part and the parts from the front part to the magnetic head center. A production method for the magnetic folding tablets combination provided with a balanced weight is also disclosed by the invention.

The invention discloses an electric gearbox automatic assembly machine capable of turning to lock a screw. The electric gearbox automatic assembly machine comprises an oiling mechanism, an upper covertaking mechanism, an upper cover pre-presser, a touch-control screen, a screw array, a screw locking mechanism, a discharge inspector, a lower cover taking mechanism, a gear B taking mechanism, a gear A taking mechanism, a turbine taking structure, a motor conveying mechanism, a lower cover detector, a table rack and a rack, wherein the upper cover taking mechanism is mounted at one side of the rack; the lower cover taking mechanism is mounted at the other side of the rack; the table rack is arranged on the bottom of each of the upper cover taking mechanism, the lower cover taking mechanism,the gear B taking mechanism, the gear A taking mechanism and the turbine taking structure; a full-material stop device is arranged at a conveying material path of the machine; the full-material stop device adopts a correlation type; after the material conveying path is full, a vibrating disc is controlled to stop supplying materials, so that electric energy is saved, noises are reduced, and resonance possibility is reduced; and meanwhile, the materials are prevented from being extruded out of the material path as a result of too great extrusion force, so that production cost is reduced.

The invention relates to a molecular sieve device which comprises a cylindrical molecular sieve cover with an opening in one end, a mounting structure is arranged at the opening end of the molecular sieve cover, an adapter plate is arranged on the outer side of the bottom of a molecular sieve cover barrel, the adapter plate is fixedly connected with the molecular sieve cover, a molecular sieve module is arranged in the molecular sieve cover barrel, and the molecular sieve module is detachably connected with the molecular sieve cover; the molecular sieve module penetrates through the molecularsieve cover to be tightly connected with the adapter plate, and a sealing rubber sleeve is arranged at the joint of the adapter plate and the molecular sieve cover. The invention further relates to amolecular sieve oxygenerator which comprises a controller, a compressor, an electromagnetic valve, a shell and a molecular sieve device, wherein a dismounting opening is formed in the shell, a cavityfor installing the molecular sieve device is arranged in the dismounting opening, and the molecular sieve device is arranged in the cavity. The molecular sieve module is designed into a whole and is in sliding connection with the molecular sieve cover, after the molecular sieve module loses efficacy, only the molecular sieve module needs to be pulled out of the molecular sieve cover to be replaced, and the problems that the molecular sieve system is difficult to replace and is high in direct rejection cost are solved.

The invention provides a light-agriculture-complementary intelligent waterfowl breeding facility which comprises a photovoltaic power generation structure unit and a facility body structure unit in elasticity-type triangular mutual support with the photovoltaic power generation structure unit. The photovoltaic power generation structure unit comprises a plurality of photovoltaic silicon plates anda plurality of uprights; the facility body structure unit comprises a hard ground, shady supporting rods with the top and the bottom connected with the back of the photovoltaic silicon plates and thehard ground and blocking thin films spread on the surfaces of the supporting rods; the photovoltaic silicone plates, the shady supporting rods and the uprights are in one-to-one corresponding arrangement, each shady supporting rod is an integrated supporting rod and arc-shaped, a distance between the bottom end of each upright to that of the corresponding shady supporting rod is greater than thatbetween the bottom end of the upright and an intersection point of an longitudinally upward extending line of the upright and a top end extending line of the corresponding shady supporting rod. The waterfowl breeding facility is simple in structure and has the advantages of 'one-land two-purpose, agriculture-light-complementing', and economic value of land in unit area is increased.

The invention discloses a vertical streamline tunnel wheel gas turbine, and belongs to the field of gas turbines. The vertical streamline tunnel wheel gas turbine comprises a gas compressor, a combustion turbine, a shaft and a combustion chamber, wherein the gas compressor and the combustion turbine are installed at the upper end and the lower end of the shaft to form a gas turbine rotor, the combustion chamber is located between the gas compressor and the combustion turbine, and the shaft is vertically arranged to form a vertical structure. The vertical streamline tunnel wheel gas turbine adopts streamline tunnel turbines and gas compressor wheels, is mounted in a vertical structure in cooperation with an external contour type air bearing, and can achieve the beneficial effects of improving the rotating speed, improving the reliability, reducing the leakage loss, reducing the size and the weight and the like.

The invention relates to the technical field of aviation equipment and discloses a lifting boarding car with high safety. A chassis is included. Side supporting rods are fixedly mounted on the left and right sides of the front surface and the left and right sides of the back surface of the chassis; one end of the inner wall of the chassis is hinged to the bottom end of the front surface of a lowergangway ladder; and a step assembly is fixedly installed at the inner bottom of the lower gangway ladder, a rest platform is fixedly installed at the top end of the bottom of the lower gangway ladder, a sliding rod support is fixedly installed on one side of the top end of the chassis, an upper gangway ladder is slidably connected to the exterior of the sliding rod support, and the inner bottom of the upper gangway ladder is located at the bottom end of the lower gangway ladder and fixedly provided with the step assembly. According to the lifting boarding car with high safety, by arranging stepping assemblies, stepping plates and shock absorption springs are used for supporting and absorbing shock of people stepping on the stepping plates so that the vibration frequencies of different people stepping on the stepping plates and transmitted to the lower gangway ladder through the shock absorption springs are the same, a possibility that resonance is generated on the lower gangway ladderby stepping on the stepping plates is reduced, and therefore supporting stability of a hydraulic cylinder is guaranteed.

The invention discloses a streamline tunnel type turbocharger adopting an external contour type air bearing. The streamline tunnel type turbocharger comprises a streamline tunnel type turbine, a streamline tunnel type compressor wheel, a turbine shell, a compressor casing, a middle shell and a shaft, wherein the streamline tunnel type turbine and the streamline tunnel type compressor wheel are arranged at the two ends of the shaft respectively in order to form a turbocharger rotor. The turbine and the compressor wheel are both of a streamline tunnel type in structure, and compared with a vanetype structure, the turbine and the compressor wheel are higher in strength and not prone to damage; and due to higher structural strength, the material selection range is widened, the cost is reduced, and the weight is controlled.

The invention relates to an impeller of a dust collector. The impeller at least comprises a front wheel cover, a rear wheel cover and blades fixedly arranged between the front wheel cover and the rear wheel cover. A first through hole is formed in the middle of the front wheel cover. The edge of the rear wheel cover is fixedly connected with the outer edge of the front wheel cover through a fairing of a cylindrical shell structure. The blades comprise the multiple main blades and the multiple splitter blades. Through an air runner formed by the blades, air flowing through the air runner has higher guidance quality and stability; through the splitter blades, the space of the air runner is reduced, and axial vortexes are reduced; since the splitter blades are distributed unevenly, the possibility that air currents of the same volume cause resonance is reduced, noise of a fan is lowered, and the energy conversion efficiency of the fan is improved; and guide baffles are used for guiding the direction of air flow and reducing the axial vortexes. The direction of air flow is further guided through the fairing, and stability of the whole fan is improved.

The invention relates to a power plant (2, 4) comprising a number of power plant components which are connected to a power supply system (1). An actuator is assigned to each of said power plant components so as to adjust a component-specific power output to the power supply system (1). The inventive power plant (2, 4) can achieve particularly great operational stability against the formation of frequency oscillations in case network islands are created. In order to so so, at least two of the actuators are designed for different control-related reaction times.

The invention discloses a washing machine with a washing machine clutch integrated with a driving motor. The washing machine with the washing machine clutch integrated with the driving motor comprises a motor assembly, the clutch and an installation plate used for installation of the clutch, wherein the motor assembly comprises a stator assembly, a rotor assembly, a front end cover and a belt pulley, the stator assembly, the rotor assembly, the front end cover and the belt wheel are connected in sequence from bottom to top, a driven wheel which is matched with the belt wheel is arranged on the clutch, the clutch is connected with a rotary shaft of the rotor assembly in a rotary mode through the belt wheel and the driven wheel, and a motor installation groove matched with the bottom of the stator assembly in shaped is also formed in the installation plate. According to the washing machine with the washing machine clutch integrated with the driving motor, a rear end cover of an original motor assembly and two gaskets used for fixing the motor are omitted, the installation groove matched with the bottom of the stator assembly in shape is formed in the installation plate, the motor assembly is fixed to the installation plate through the installation groove, in this way, the assembly precision and the control flexibility between the motor and the clutch are improved, and cost is reduced.

The invention discloses a partial weight control design method for shock absorption of a wind power structure system. In consideration of the action effect, caused by different types of harmonic excitations actually stressed on a fan, on the structure, the self frequency characteristic of a designed fan system is far away from the rotating frequency harmonic excitation which greatly affects the structural shock excitation by adjusting a frequency domain weight between the structural modal frequency required for guaranteeing the structural operation safety in the fan design and the excitation frequency and calculating an allowable selection range of a first-order modal frequency of a fan structure to be designed, and the possibility of resonance is reduced. Furthermore, by the fan design flexibility, the fan and foundation structure forms and selectable materials are diversified; by the reasonable design, the engineering manufacturing cost can be reduced, and higher engineering applicability and economical benefit can be achieved.

The invention discloses a vertical streamline tunnel wheel supercharger, and belongs to the field of turbochargers. The vertical streamline tunnel wheel supercharger comprises a streamline tunnel typeair compressor wheel, a streamline tunnel type turbine, an air compressor shell, a turbine shell and a rotating shaft, wherein the streamline tunnel type gas compressor wheel and the streamline tunnel type turbine are installed at the two ends of the rotating shaft correspondingly so that a supercharger rotor can be formed, the rotating shaft is vertically arranged and forms a vertical structure.According to the vertical streamline tunnel wheel supercharger, the streamline tunnel type turbine and the gas compressor wheel are adopted and matched with an external contour type air bearing to beinstalled in a vertical structure, and the beneficial effects of improving the rotating speed, improving reliability and stability, reducing leakage losses and reducing the size and the weight can beachieved.

The invention discloses a method and a device for controlling fan speed, which aims at solving the problem of weak functions of the scheme of fan speed control in the prior art. The method comprises the following steps: controlling the fan speed, detecting vibration amplitude of vibration-sensitive units in the device, and readjusting the fan speed based on the current fan speed if the detected vibration amplitude is greater than the threshold in the process of controlling the fan speed. The control on the fan speed based on vibration detection reduces the possibility of generating resonance. Thereby, the invention has the advantages that the functions are enhanced as compared with the prior art.

The invention discloses a composite-state type motor damping table base. The composite-state type motor damping table base comprises a base, wherein a placing slot is formed in the upper end surface of the base; a plurality of limiting slots are symmetrically formed in the inner walls of the placing slot; load-bearing plates and movable plates are separately connected in the corresponding limitingslots in a sliding mode; the load-bearing plates are positioned above the movable plates; and a plurality of damping springs are elastically connected between the load-bearing plates and the movableplates. According to the composite-state type motor damping table base disclosed by the invention, a permanent magnet block can be matched with an induction coil, so that magnetic field intensity of an electromagnet can change along with changes of vibrating frequency of working equipment, and thus, the purpose of adjusting an applicable frequency range according to changes of vibrating frequencyof the working equipment by a damping part consisting of damping springs, the movable plates, elastic gasbags and magnetorheological fluid is achieved, the working equipment can be damped and bufferedbetter, resonance possibility of the base and working equipment further can be reduced, and the working equipment can be guaranteed to stably operate.

The invention discloses a method and a device for improving kinetic stability of a metal hub of a high-stored-energy flywheel. By changing the geometric dimension of the metal hub of the high-stored-energy flywheel, the natural frequency of the metal hub is changed to avoid resonance resulting from the fact that the natural frequency of the metal hub and the working frequency of the metal hub are the same; and a deflection torque is generated in the rotation process of the hub to prevent the edge of the hub from falling off from the hub and keep the magnitude of interference of the hub, so as to improve the kinetic stability of the metal hub. The natural frequency and the center of the centrifugal force of the hub are changed by changing the geometric dimension of the metal hub, therefore, not only is the probability of resonance generated in the operation is effectively reduced, but also the problem of loss of magnitude of interference of the edge of the hub and the metal hub is effectively solved, and the kinetic stability of the metal hub is improved.

The invention relates to a method for inhibiting the vortex-excited oscillation of a submarine pipeline. The method comprises the following steps: (1) fabricating tongue-like flow-guiding sheets of different sizes and curvatures according to the inner and outer diameters of the submarine pipeline to be protected, allowing each sheet to be tapered from the bottom to the top, forming a square wave-shaped notch at the bottom edge of each sheet, fixing a Z-shaped trip wire on the outer wall of each sheet, and allowing the square wave-shaped notches of the sheets in pair to be engaged with each other; (2) assembling and fixing flow-guide shields on the submarine pipeline at a distance 1.5-2.5 times of the outer diameter of the submarine pipeline, wherein each flow-guide shield is formed by two flow-guide sheets by assembly and welding, forming two symmetric shell bodies with raised middle part and two interconnected top ends, so that the submarine pipeline is enclosed therein. The inventive method can efficiently control the vortex-excited oscillation and simultaneously control the construction complexity and cost in an acceptable range, and realizes the optimization of construction complexity, construction cost and inhibitory effect on vortex-excited oscillation.

The invention provides a high-voltage control power supply and telemetering acquisition circuit for a spacecraft. The high-voltage control power supply and telemetering acquisition circuit comprises a driving control circuit, a power output circuit and a telemetering acquisition circuit, the driving control circuit is connected with the power output circuit, and the power output circuit is connected with the telemetering acquisition circuit; the driving control circuit provides a control voltage signal for the power output circuit; the power output circuit is used for power input and power output; and the telemetering acquisition circuit is used for outputting voltage telemetering and current telemetering. The power supply safety and stability are ensured through the DC-DC driving power N-MOS tube, and accurate monitoring and fault mode analysis of power supply can be realized through the accurate telemetering acquisition circuit.

The invention discloses a light-weight machine tool crossbeam reinforced with an arched rib plate. The interior adopts an arched ribbed plate, and a plurality of longitudinal diaphragms are symmetrically distributed based on the middle surface of the crossbeam. The crossbeam cross section is a rectangular cross section. The invention solves the problems of constant stiffness and material "redundancy" caused by the common stiffener plate inside the beam, increases the stiffness of the middle part of the beam, improves the dynamic characteristics of the beam, reduces the weight of the beam, and realizes Lightweight design. The beam cross-section adopts a widely used rectangular cross-section, which has a simple structure and is easy to install with other parts such as columns and carriages.

The invention relates to the field of rail transportation system, in particular to a shoegear and a rail train transportation system including the shoegear. According to the invention, the invention aims at solving the problem that the noise generated between the power receiving shoe and the power supply rail affects the surrounding environment. For this purpose, the power receiving shoe of the invention is respectively connected with the power supply rail and the power receiving vehicle body, and the power receiving shoe comprises a body and a noise-absorbing cover, wherein the body is respectively connected with the power supply rail and the power receiving vehicle body, and the noise-absorbing cover is connected with the body and arranged to wrap the body so as to reduce the noise generated during the sliding process of the body along the power supply rail. The power-receiving shoe of the invention envelops the noise source between the power-receiving shoe body and the power supplyrail by providing a noise-absorbing cover, thereby avoiding the noise from affecting the surrounding environment.

The invention discloses a streamline tunnel type turbocharger, and belongs to the field of turbochargers. The streamline tunnel type turbocharger comprises a streamline tunnel type turbine, a streamline tunnel type gas compressor wheel, a turbine shell, a gas compressor shell, a middle shell and a rotating shaft. The streamline tunnel type turbine and the streamline tunnel type gas compressor wheel are installed at the two ends of the rotating shaft correspondingly, and a supercharger rotor is formed. An oil thrust bearing assembly is arranged at the rear side of the streamline tunnel type gascompressor wheel. The streamline tunnel type turbocharger is higher in strength, and damage is not likely to happen; due to higher structural strength, the material selection range is widened, the cost is better reduced, and the weight is controlled; and if the turbine and the gas compressor wheel which are completely the same in structure are used, especially when a ceramic composite material isused, the design and manufacturing cost can be greatly reduced. The streamline tunnel type turbocharger has the beneficial effects that the characteristics of a closed rotating machine are fully utilized, the outer contour surfaces of the turbine and the gas compressor wheel serve as working surfaces of radial supporting bearings, the rotor has a high critical rotating speed, and the possibilityof resonance generation is greatly reduced.