45results about How to "Reduce vibration displacement" patented technology

The invention discloses a tuning quality damper vibration reduction control device used in a wind turbine, which relates to tuning quality damper vibration reduction control technology. The invention is arranged inside a tower arranged at an upper end of a wind generator and comprises a platform, rotation adjusting devices, a power device, a quality block assembly and a damper arranged on the platform; the platform is fixed on the internal wall of the tower; the key design points of the invention are characterized in that: the power of the power device drives the quality block assembly to rotate through the rotation adjusting devices so that the components on the platform can rotate synchronously along with the yaw of the wind turbine. Opposite direction adjustment can be realized forwardly along with wind directions by the invention, thus controlling vibration amplitude to the utmost extent. Furthermore, based on MTMD vibration reduction mechanism, the invention also provides an MTMD technical proposal with a plurality of single TMDs arranged from top to bottom in sequence; the power device coaxially drives varied rotation adjusting devices, thus guaranteeing the synchronous rotation speed of each turntable and controlling the vibration of the tower within a frequency band scope caused by the rotation of wind wheels.

The invention discloses a vibration reduction ship pipeline cabin penetrating piece which comprises a pipeline and a cabin wallboard. The pipeline is externally provided with a cabin penetrating piece shell. The cabin penetrating piece shell is divided into an outer cabin penetrating piece shell body, a wavy shell body and an inner cabin penetrating piece shell body. The outer cabin penetrating piece shell body is connected with the cabin wallboard, the wavy shell body is connected with the outer cabin penetrating piece shell body at crest positions, and wavy fireproof rubber is arranged between the wavy shell body and the outer cabin penetrating piece shell body. Perpendicular connecting pieces are arranged on the inner cabin penetrating piece shell body and are provided with connecting rings, and parallel springs are arranged between the connecting rings and are parallel to the outer cabin penetrating piece shell body and the inner cabin penetrating piece shell body. Perpendicular springs perpendicular to the wavy shell body are arranged on the crests, and the parts, at the joint of the crests and the outer cabin penetrating piece shell body and at the outer portion of the outer cabin penetrating piece shell body, of the perpendicular springs are provided with bolts. A transverse partition plate is arranged at the middle portion of the cabin penetrating piece shell and is connected with the parallel springs. The vibration reduction ship pipeline cabin penetrating piece has the following beneficial effects that firstly, the vibration reduction capability of the pipeline cabin penetrating piece under collisions is improved; secondly, the vibration reduction capability of the cabin penetrating piece can be adjusted according to needs of different pipeline systems; and thirdly, the wavy shell body in the cabin penetrating piece can well reduce stress concentration.

The invention relates to the air conditioning technical field, specially relates to a second level support fixed device of a vibration noise decreasing compressor, solves the problem that the low frequency noise generated by the resonance of the vibration of the compressor and the shell of the air conditioner. The technical project to solve the problem comprises a compressor provided with three feet flakes separated in 120 degree and screwed connected on the air conditioner, the compressor screwed connected with the screw of the air conditioner and a rubber shock absorber cushion cross-under the screw and connected with the feet flakes of the compressor, wherein the three feet flakes provided with via holes are weld at the middle-lower part of the shell of the compressor, the bottom of the three feet flakes provided with via holes are connected with an utensil-shaped fixed frame that has the same three feet flakes that could contain the lower shell body of the compressor via rubber shock absorber cushion, the three feet flakes at the bottom of the fixed frame penetrates via the screw and connects with the chassis of the air conditioner via the rubber shock absorber cushion between the feet flakes and the chassis, to decrease the resonance noise generated by the vibration of the compressor and the shell of the air conditioner.

The invention discloses a vibration suppression method of a rolling mill roll system with a vibration absorber device. The method comprises the steps that at first, a rolling mill system vibration model which comprises the vibration absorber device and acts together with the rolling mill rolling system is set up; according to the set-up rolling mill roll system vibration model with the vibration absorber device, a two-freedom-degree system function and an amplitude frequency equation of the system are obtained; time-domain characteristic curves and amplitude-versus-frequency curves before and after the control vibration absorber is added are obtained in a simulation manner, and the influence to the amplitude-versus-frequency curves from mass of the vibration absorber, spring force and friction force is analyzed in a simulation manner. According to the method, by means of the time-domain characteristic and the amplitude-versus-frequency characteristic, the mutual influence relation between the vibration absorber device and the rolling mill roll system is obtained, the mass of the vibration absorber device, rigidity of an elastic element and the size of friction coefficients of a damping element are adjusted properly, the effects of reducing vibration displacement of the rolling mill roll system and restraining vibration of the rolling mill roll system can be achieved, thus, the stability of the rolling mill system is improved, and a new solution method is provided for controlling the stability of the rolling mill roll system.

The invention discloses a female joint of a coaxial cable connector, which comprises a central conductor, an insulator and an outer conductor; the central conductor is provided with a concave jack and a deep hole used for inserting an inner conductor of coaxial cable; the insulator is a circular ring with a through hole in the center; the external diameter of the front end part of the insulator is less than the external diameter of the rear end part; the outer conductor is divided into a front section, a middle section and a rear section; the front section is provided with an annular socket facing towards the front end; the internal diameter of the rear section is used for inserting the coaxial cable; the internal diameter of the front section is equal to the internal diameter of the middle section and matched with the external diameter of the rear end part of the insulator; the internal surface of the middle section is transited to the internal surface of the rear section through a first step; the internal diameter of the through hole of the insulator is matched with the external diameter of the concave jack of the central conductor; the central conductor can be integrally inserted into the through hole of the insulator; and the outer circumference at the rear end part of the central conductor is provided with a contractive compensating groove. The female joint meets the conventional technical standards; the central conductor is wholly inserted into the through hole of the insulator from the rear end and is stably fixed, so, the female joint is more convenient to assemble.

The invention provides an apparatus and a method for reducing vibration of a split-core reactor from a body, Starting from the origin of the electromagnetic vibration of the iron core, namely magnetostriction, the vibration displacement of the iron core is reduced by using the staggered assembly of oriented silicon steel sheets and non-oriented silicon steel sheets, and by using the opposite magnetostriction effect of oriented silicon steel and non-oriented silicon steel in service.

The invention relates to the field of functional structures of socks and discloses running socks with a foot arch support function. Each sock comprises a foot arch support device corresponding to a foot arch part of a human body, wherein the foot arch support device comprises two parts, one part is an elastic band structure corresponding to an instep of the human body, and the other part is a sole support structure corresponding to a sole of the human body. According to the foot arch support device, a foot arch structure is supported through matching of the two parts, the elastic band structure above the instep provides sufficiently strong elasticity, the apex of the foot arch is pressed while the pressing sense is not so strong, and enough pressure and cushioning force are provided for the foot arch. The sole support structure below the sole can support the corresponding foot arch of the human body and reduce the pressure of the foot arch, then enough support is provided for the foot arch during sports, and injury and deformation of the foot arch are prevented. Besides, better benefit increasing effect can be realized through combination of structural change with novel materials.

The invention discloses a structural mode identification method based on computer vision and variational mode decomposition, and the method comprises the steps of collecting a vibration video of a structural object, and selecting pixel points meeting a preset pixel level in the vibration video as feature points; calculating the speed of each selected feature point by using a Farneback dense optical flow algorithm; calculating the speed and acceleration of each feature point in a real ground coordinate system by using a scale transformation mode to obtain an acceleration signal of a non-stationary sequence; performing noise reduction processing on the acceleration signal by using a variational mode decomposition method; and recognizing the acceleration signal after noise reduction processing by using a frequency domain decomposition method to obtain the vibration characteristics of the structure in each order mode. According to the invention, the vibration video of the structure is calculated and multi-modal extracted by using the improved optical flow algorithm in a non-contact manner, so that the real-time, efficient and low-cost detection of the dynamic characteristics of the structure is realized.

Disclosed is a sensor, comprising: a housing; a detecting element provided inside the housing; a first cylinder provided inside the housing and sleeved outside the detecting element, the first cylinder having an amount of elastic deformation in a direction intersecting a surface around the detecting element; a particle filler, for filling an inner cavity of the housing. When external environment produces mechanical shock to the sensor or the sensor produces mechanical vibration, the limiting action of the first cylinder and the particle filler enables the detecting element to only have very little vibration displacement or even no vibration displacement with respect to the housing. The external mechanical shock can be partially or completely absorbed by the first cylinder and the particle filler, so as to reduce vibration displacement of the detecting element caused by the shock.

The invention relates to a bridge crane with a high-speed assembly. The bridge crane comprises a bridge frame, a trolley, a lifting mechanism and a lifting appliance (19), wherein the trolley, the lifting mechanism and the lifting appliance (19) are arranged on the bridge frame. The trolley comprises a frame (1), walking wheels (3) and horizontal guide wheels (17). The lifting mechanism comprisesa steel wire rope and a winding assembly. Wheel high-speed vibration reduction assemblies (2) are arranged on the walking wheels (3). Lateral high-speed vibration reduction assemblies (18) are arranged on the horizontal guide wheels (17). A trolley high-speed traction assembly (15) is arranged on the frame (1). A cabin hanging protection and vibration reduction assembly (14) is arranged on the lifting winding assembly. A lifting appliance rapid stabilization assembly is arranged on the lifting appliance (19). Compared with the prior art, the bridge crane has the beneficial effects that the lifting speed of the crane and the horizontal running speed of the trolley are greatly increased, the structural vibration displacement of the crane is obviously reduced, the whole crane runs more stably, and the production efficiency is greatly improved.

The invention discloses a controllable air static pressure radial bearing, and relates to a vibration detection and control system in the working process of an air static pressure main shaft. The system is provided with an air static pressure main shaft system, four piezoelectric ceramics, four eddy current sensors and an upper computer. The four piezoelectric ceramics are installed on a bearing shell through a clamping device, the other ends of the piezoelectric ceramics act on bearing bushes, elastic supporting devices are arranged in gaps between the bearing bushes at the two ends of the bearing and the shell, the four eddy current sensors are vertically distributed at the two ends of the main shaft in pairs, and the eddy current sensors receive vibration signals. The vibration signals are converted into corresponding control voltage signals by the upper computer to act on the piezoelectric ceramics, and the piezoelectric ceramics generate corresponding displacement to push the movable bearing bushes to extrude an air film to generate air film force to inhibit vibration of the main shaft.

The invention discloses an explosion-proof motor base adopting an ejection line structure. The explosion-proof motor base comprises a main junction box base, an auxiliary junction box base and coolingfins. A plurality of ventilating ducts are distributed in the base and arranged in a certain mode; and the connecting positions of the ventilating ducts and a base barrel adopt a variable-thickness structure. Under the premise of not increasing the weight and the center height of the base and ensuring the structural strength of the motor, the radial rigidity of the base structure is improved by adopting a special technical means so as to achieve a shockproof purpose; and meanwhile, the internal ventilation sectional area of the base is increased by adopting a special structural design so as to greatly and effectively improve the internal and external heat exchange efficiency of the base, effectively prolong the service life of the motor and guarantee the operation safety.

The invention discloses a damping-adjustable silicon micro tuning fork resonant accelerometer structure. An acceleration structure is arranged on a middle monocrystalline silicon piece of three-layer monocrystalline silicon, and the structure comprises a mass block, two resonators, four micro lever amplification mechanisms, a stress release mechanism, a plurality of supporting beams, a plurality of damping adjusting mechanisms and a plurality of fixed bases. The damping adjusting mechanisms are uniformly distributed on the mass block. The two resonators are symmetrically arranged in the middle of the mass block relative to the x axis, and the micro-lever amplification mechanism is located between the two resonators. One ends of the inner sides of the two resonators are connected with the output ends of two micro-levers respectively, and the fulcrum ends of the two micro-levers connected with the same resonator are connected to the same stress release mechanism and then connected with the corresponding fixed base. The input ends of the micro-lever mechanisms are connected with the mass block, the mass block is connected with the fixed bases through the supporting beams, and the fixed bases are connected with the fixed bases of the upper-layer monocrystalline silicon and the fixed bases of the lower-layer monocrystalline silicon. The temperature coefficient of the frequency is reduced, and the damping is adjustable.