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 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 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 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 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 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 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.