243results about How to "Easy installation" patented technology

This invention relates to one payoff method based on internet, which comprises the following steps: customer visit payoff platform downloading safe plug; safe plug gets customer host information and connects contract require to platform; the back of plug tests its validity and records its machine information; safe plug judges whether the customer machine uses agent or remote control; if yes, thendenying the payoff requires. This invention also provides one payoff system and platform.

In the invention, rainfall unit, canopy and low step face model are position at upper, middle and lower parts of bracket. Rainfall unit includes main pipe connected to water inlet pipe and branch pipes, and discharge pipe is in side opposite to the main pipe. Low step face model includes slope face, sidewall, movable lateral clapboard and movable back clapboard. Four sidewalls in model are sidewall, front wall, movable lateral clapboard and movable back clapboard. The invention includes sampler, curb and runoff bucket are arranged at proper position. Main pipe and branch pipes are made from PVC. Raininess is even. The invented equipment is suitable to indoor model test for larger area. The equipment is easy to be installed.

The invention is designed for solving the technical problems of image long-distance distortionless transmission, image real time requirement and image compressed coding. The system comprises: a front end monitoring device used for collecting the video signal within the monitored range and processing the collected signals into an image signal format capable of being transmitted in data network; a data network used for transmitting the image signals to the supervision center; and a supervision center used for receiving the image signals from the data network and transmitting them the relevant supervision terminals.

The invention relates to a process for atomizing desulfurization waste water through recycled flue gas of a tower type boiler. The process comprises the steps that the desulfurization waste water of a desulfurization tower is drained to a stilling basin for preliminary sedimentation, and then the desulfurization waste water is pressurized through a pump and conveyed to a pipeline of a nozzle; part of the desulfurized flue gas is sent to the pipeline of the nozzle through a recirculation fan, so that the recirculation flue gas is in contact with the desulfurization waste water in the pipeline of the nozzle, and the initial temperature of the desulfurization waste water is raised; the nozzle is installed in a vertical flue located at the tail of the boiler, the desulfurization waste water is jetted and atomized, atomization liquid drops into the flue and evaporates quickly, and all ions in the desulfurization waste water are separated by crystallization quickly, captured by a dust remover when entering the dust remover along with the flue gas and discharged outward along with dust. By means of the design of the process, atomization performance of the desulfurization waste water is improved, evaporation of the desulfurization waste water is accelerated, blocking of a jet system can be prevented, the desulfurization waste water is effectively prevented from being jet to the pipe wall, the problem of corrosion of the wall surface of a flue which is caused easily when ordinary flues are used for treating desulfurization waste water is avoided, innocent treatment of the desulfurization waste water in the real sense is achieved, reconstruction investment is small, and operation cost is low.

The invention belongs to the field of quick virtual machine deployment systems, discloses an Xen-based virtual machine deployment system and an Xen-based virtual machine deployment method and solves the problem that an existing quick Xen virtual machine deployment system cannot meet large-scale cloud environment requirements and fails to dynamically change IP (internet protocol) addresses and software environments of virtual machines. According to demands of users, a JSP webpage server, a Tomcat webpage server and an MySQL database are combined to serve as a front end of a front-end system and a management system, a front-end server is in interaction with the users and sends different instructions to load servers by means of adoption of a Livbirt control library for communication according to configuration parameter information of user demands acquired from interaction, and the front-end system selects increment mirror images in a mirror image template library and carries out one-key deployment of different operating systems and one-key deployment of virtual machines for different applications by means of virtual machine increment for deployment; the IP addresses of the virtual machines are automatically configured according to the information of user demands. On the basis of the different deployed operating systems and the deployed virtual machines for different applications, life cycles of the virtual machines can be controlled by the users; in addition, the software environments of the virtual machines can be changed dynamically.

The invention discloses a sealing device of a rock sample in a true triaxial test, which comprises bearing cushion blocks, sealing rubber bars, silica gel coating, a rock sample and antifriction gaskets, wherein the four bearing cushion blocks are respectively sequentially arranged on four end parts of the rock sample, which are performed rigid load in two directions, and one end of each bearing cushion block is in alignment with the rock sample in a mutually buckled way; the bearing cushion blocks and the end parts of the rock sample are provided with the antifriction gaskets, each antifriction gasket consist of a polyfluortetraethylene sheet, a red copper sheet and solid antifriction material such as graphite or zirconia, and the like, one side of the red copper sheet is stuck to the end part of the rock sample; and the rest two end parts of the rock sample, which are to be performed flexible load are coated with organic silicon gel and are covered by the bearing cushion blocks, and a sealed integer is formed by the rock sample dried in a oven and the bearing cushion blocks. The sealing device has simple structure and simple and convenient operation, is adapted to the two-rigidity one-flexibility load method of the mogi type and true triaxial type and solves the problem of stress concentration of the rock sample caused by blank corners.

The invention discloses a vision-based automatic sorting and boxing equipment for parts assembly line, which belongs to the technical field of robot visual recognition and positioning. The use process of this equipment is divided into offline teaching and online identification, positioning and sorting. Offline teaching manually places parts into the field of view of the camera, the camera collects images and extracts features, and manually controls the robotic arm to pick up parts. The purpose is to Input parts information; online identification, positioning and sorting through real-time collection of parts image information on the transmission line, and extracting its features through the industrial computer, and comparing with the features extracted offline, to realize the identification of the current part model, and Calculate the amount of relative translation and rotation, and send the amount of translation and rotation to the robot controller to control the robotic arm to pick up and pack parts. The device can identify and locate any conveyor belt and parts placed in any position and posture. It is easy to add and calibrate new parts, improving its practicability and scalability.

The invention relates to bagging equipment for fruits, in particular to an apple bagging mechanism. A fruit bag device and a suction device are respectively arranged on a mechanical arm connecting substrate, an upper bag gluing device is connected with the fruit bag device through a pitch device and a retractor device, and a lower bag gluing device is connected on the fruit bag device; the upper bag gluing device is moved up and down through the pitch device, and the upper bag gluing device is moved back and forth through the retractor device; a sucker of the upper bag gluing device separately picks up fruit bags, and the suckers of the upper and lower bag gluing device work together to unfold the openings of the fruit bags; colloids in the fruit bags are heated by electric heating members in the upper bag gluing device, so that the colloids are melted to glue the upper and lower layers of the fruit bags under the function of extrusion force; the lengths of the suckers can be changed by reset springs on the suckers, in the process of unfolding the bags, the reset springs function and the suckers of the sucking discs are contacted, but the electric heating members and the heating cushion blocks are not contacted; in the bag sealing process, the reset springs are shortened under the function of extrusion force, the electric heating members and the heating cushion blocks are contacted to generate the extrusion force. According to the apple bagging mechanism, manpower can be saved and the efficiency is high.

The invention discloses a planar EMI filter integration module consisting of circular PCB wire turns, which belongs to a planar magnetic integration structure of an EMI power filter. The module comprises a pot-shaped magnetic core (201), common mode inductance layers I, II, III and IV (203, 204, 208 and 209), differential mode capacitors I and II (202 and 210), common mode integrated LC structures I and II (205 and 207) and a leakage inductance layer (206). The integration structure of the invention has a relatively smaller volume, is easy to arrange, improves the utilization rate of a conductor, makes high-frequency current uniformly distributed on a planar spiral coil, improves the insertion loss of the filter, improves the high-frequency performance of the filter and can be applied to a front-end converter in a distributed power system.

The invention relates to a method of direct station obtains breaking point in TD-SCDMA system; the method includes steps as following: when it is started, the direct station is switched to the state of receiving down-bound signal to receive down-bound signal; the direct station captures the time that down-bound pilot frequency signal arrives at the direct station; from the hour that the TS2 time slot ends, the hour that every time slot ends is supposed as possible time of the second switching point; determining whether the switching section is a real time switching section; processing the next time slot; when the direct station receives the up-bound pilot frequency signal for the second time, then it is recovered to normal condition to execute the ascending-descending switch of step 1-step 6. The invention adopts method of base band synchronization to obtain the information of breaking point automatically without distribution with benefactor base station, it can be worked at system that the distribution mode of ascending-descending time slot is continuously changeable, the engineering is easy to install, the cost is low, and the interference of noise to areola can be decreased efficiently.

The invention discloses a hollow fibrous membrane module, the two ends of which can have water flowing out for immersing, and aims to provide a membrane module, of which the support tube not only has support function, but also serves as a water channel with the two ends having water flowing out, the structure is simple and the aeration is even. An aeration inlet column is arranged at an air inlet, one end of the aeration inlet column communicates with an aeration device, and the other end is spliced with an inlet pipe. The aeration device comprises an aeration body, in which an air collecting chamber and a water collecting chamber are arranged, the outer side of the aeration body is connected with a plurality of sealed air chambers, and a plurality of aeration holes are arranged on each sealed air chamber. The water collecting chamber is internally provided with a plurality of water outlets, the lower end of the aeration body is provided with a plurality of water inlets, and water passages communicating the water inlets with the water outlets are arranged on the aeration body. One end of the support tube is opened on the end surface of the sealing layer of the water outlet end, and the other end communicates with the water collecting chamber of the aeration device. The support tube has the support function and serves as the water channel with the two ends having water flowing out, thereby simplifying the structure of the membrane module, reducing the volume of the membrane core, reducing the construction cost, and improving the utilization ratio and the water yield of membrane threads.

The invention discloses a vehicle-mounted hoisting fixed platform of a rotor-wing type unmanned aerial vehicle. The vehicle-mounted hoisting fixed platform of the unmanned aerial vehicle is composed of an unmanned aerial vehicle fixing part, a clamping rod movement device, a fixing beam and a driving mechanism; peripheral devices comprise the unmanned aerial vehicle and an automobile; the unmanned aerial vehicle fixing part is provided with a peripheral groove clamped with a clamping rod; the fixing beam is fixed at the top of the automobile; the clamping rod movement device is mounted on the fixing beam; the clamping rod movement device is driven by the driving mechanism to move to realize clamping and separation of the peripheral groove of the unmanned aerial vehicle fixing part, so that fixation and separation of the unmanned aerial vehicle and the vehicle-mounted hoisting fixed platform are realized. The vehicle-mounted hoisting fixed platform of the rotor-wing type unmanned aerial vehicle is simple and rapid to mount and can be used for rapidly eliminating deposited water of the vehicle-mounted platform and eliminating influences, caused by reflowing air, on the descending of the unmanned aerial vehicle.

The invention is mainly used for a technology of oblique-pulling buckling and hanging of main arch rib cantilever splicing of a steel pipe concrete arch bridge, and particularly relates to an arch rib buckling and hanging installing structure of a steel pipe arch bridge. A main arch steel pipe of the steel pipe arch bridge is provided with a hoop system, the hoop system comprises two symmetrical semicircular hoop units, the semicircular hoop units are arranged on an upper layer arch rib, a semicircular wrapping plate directly wraps the main arch steel pipe, connecting plates are arranged on the two sides of the semicircular wrapping plate to perform bolted connection of two semicircular hoop units, the connecting plates are provided with bolt pin holes, the bolt pin holes enable an anchor box to be connected with a hoop through pin shafts, and a buckling and hanging cable is anchored into the anchor box. The installing operation is simple and convenient, a temporary buckling point of the steel pipe arch bridge can be installed in a time-saving and labor-saving mode, construction operations such as welding of lifting lugs to a main arch rib are avoided, and the influences, such as unevenness of stress to a main arch, which are caused by residual stress and the like resulting from welding are reduced. The arch rib buckling and hanging installing structure of the steel pipe arch bridge has the advantages of being reasonable in structural design, favorable for structural safety and stability, simple to operate and low in construction cost.

The invention discloses an injection slurry diffusion range and rule determining method during anchor rod slurry injection. The determining method comprises finishing installation of an anchor rod during underground chamber engineering anchoring and slurry injection, and slurry injection, primarily determining a diffusing range of the slurry in surrounding rocks via geological observation, building a 3D rectangular coordinate system with a slurry injection hole as an original point, designing a spatial position of monitoring points in an osmotic pressure monitoring network and determining a 3D coordinate of each monitoring points, arranging a high-precision infrared osmometer in the designed monitoring points, sending data monitored by the infrared osmometer to a data processing terminal, and drawing a slurry injection hydraulic pressure and slurry diffusing range spatial distribution map according to the data achieved by the data processing terminal. The beneficial effects of the injection slurry diffusion range and rule determining method during anchor rod slurry injection are that compared with previous a theoretical model experiment for slurry diffusion search, deficiencies can be overcome that a method achieved in the theoretical experiment for determining a slurry diffusion range cannot be totally suitable for composite and variable geological conditions.

The invention provides a high-precision wheel turning angle measuring device and measuring method. The high-precision wheel turning angle measuring device is used for an agricultural machine automatic navigation control system and is simple in structure and easy to mount. The measuring device comprises a connecting rod structure, a collecting module and an angle sensor. the connecting rod mechanism is connected with an agricultural machine steering mechanism, and the linear motion of an agricultural machine steering oil cylinder is transformed into the rotation of the angle sensor, or the swing of an agricultural steering arm is transformed into the rotation of the angle sensor; a 32-bit embedded processor serves as a kernel of the collecting module, and the collecting module is provided with various angle sensor data collecting interfaces. According to the measuring method, original data of the angle sensors are transformed into wheel turning angle values according to a model of the relation between wheel turning angles and output values of the angle sensor. According to the wheel turning angle measuring device and measuring method, mechanism and measurement integrated design is achieved, and the wheel turning angle measuring device and measuring method are novel for the agricultural automatic navigation control system.

The invention provides a GIS equipment contact temperature monitoring test apparatus which comprises a conductor, a conductor plugging contact seat, a test tank, sleeves and flanges, wherein the sleeves includes a first sleeve and a second sleeve; the conductor is inserted into the conductor plugging contact seat and is placed in the test tank; and the first sleeve, the flanges and the second sleeve are sequentially mounted from top to bottom on an outer-side tank wall of the test tank. The test tank, through applying current via the sleeves and methods of changing the resistance of contact resistors of a moving contact and a fixed contact or a method of adjusting the magnitude of the externally applied current, changes the temperature of a tested part, and thus infrared temperature measurement and thermocouple temperature measurement are conducted, and gas components and concentration in the test tank are changed through a gas-charging connector, and the influence of the gas insulation medium on infrared temperature measurement is determined. The GIS equipment contact temperature monitoring apparatus is simple in structure and easy to install.

The invention provides a light source module, surface area light-emitting unit, and surface area light-emitting device that have versatility, where installation work is simplified and production costs are reduced, and where irregularity of light emission and color is sufficiently suppressed. The light source module has a light direction-converting optical element (29) and an LED (28). The light direction-converting optical element (29) has a recess (290) with a light incident surface (29A) into which light enters, a light reflecting surface (29B) for reflecting light entered from the light incident surface (29A), and a light emitting surface (29C) for emitting to a side the light reflected by the light reflecting surface (29B). The LED (28) is placed in a recess (290) of the light direction-converting optical element (29) with a gap provided in between them and applies light to the light incident surface (29A).

The invention discloses a multi-student standing and sitting detection method based on an optical flow and k-means clustering, and the method comprises the steps: collecting image information of a student region; carrying out the moving object region detection for the student region, detecting a moving region in an image through an inter-frame difference method, and marking a moving object region template through a connection domain marking algorithm; enabling the moving object region template to be superposed with an original image, carrying out the optical flow calculation of the moving object region, and obtaining a motion vector of a feature point; enabling the optical flow to be divided into an upward group A and a downward B, and carrying out the clustering; determining that the object performs standing and sitting motions if the number of continuous appearing times of the same central point reaches a certain value, and ending the detection at this moment. Compared with the prior art, the method can achieve the detection of the standing and sitting behaviors of the students through one camera, and the equipment is simple and easy to install. The method is suitable for various types of environments. The method is high in detection accuracy, is better in instantaneity, and can achieve the class demands. The method can achieve the detection of simultaneous standing condition of a plurality of students, and is more practical.

The invention relates to a connection mechanism for testing treatment tool and machine station, comprising treatment tool box, of which at the top testing circuit board can be set; and testing machine station, in which testing instrument can be set. Slipping devices are set at two facing positions at the bottom of treatment tool box so that the treatment tool box can move and locate on the bearing platform at the top of testing machine station quickly and easily. After the treatment tool box locates, there are multiple holding devices on the bearing platform to hold clamping device pivoted at two facing walls in the treatment tool box so that the clamping device can generate rotary displacement and unlocking status is formed. But the connection module can deviate from the clamping device and extend through the port at the bottom of treatment tool box. It is connected with the interlaying module set on the bearing platform in depression. Here the treatment tool box is connected with the testing machine station in current. So testing instrument in testing machine station can test the circuit board at the top of treatment tool box so that assembling time for testing circuit board is decreased greatly, it is favor of changing treatment tool boxes with different specification quickly. The invention has labor saving mechanism and so only one man is need to install easily.

The invention relates to a vehicle front suspension control arm which comprises a control arm main body, wherein the control arm main body is provided with a connecting end with a steering knuckle, a front connecting end with a vehicle frame and a rear connecting end with the vehicle frame, a ball head pin assembly is fixed at the connecting end with the steering knuckle through a bolt, a ball head pin assembly is fixed at the front connecting end with the vehicle frame, and a hydraulic lining is fixed at the rear connecting end with the vehicle frame. The front suspension control arm can improve the cushioning effect of a vehicle, thereby improving the drivability and the comfort of vehicle driving.

The invention provides a vehicle monitoring device which comprises a signal monitoring unit, a signal processing unit, a magnetic image sensing unit and a regulation-violating vehicle recording unit, wherein the signal monitoring unit is used for monitoring a signal of a passing vehicle and transmitting the signal to the signal processing unit; the signal processing unit is connected with the signal monitoring unit and is used for determining whether the vehicle violates the regulations and determining the violation type; the magnetic image sensing unit acquires an magnetic image of the passing vehicle, wherein the magnetic image is used as the identity information of the passing vehicle; and the regulation-violating vehicle recording unit associates and records the identity information and the violation type of the regulation-violating vehicle under the condition that the signal processing unit determines that the passing vehicle violates the regulations. The technical scheme of the invention can solve the problems of complex installation, high cost and easy escape of the monitoring device in the prior art. The invention also provides a device, a system and a method for detecting regulation-violating vehicles.

A muffler unit 30 for a saddle-ride type vehicle includes a first protector 70 which covers an outer surface of a muffler body 35 and serves as a thermal insulator, and a second protector 80 disposed on an outer surface of the first protector 70. The first and second protectors 70, 80 are attached and fastened together to the muffler body 35. The first protector 70 is larger than the second protector 80, and has a large recessed portion 71 into which the second protector 80 fits. The second protector 80 is disposed such that its outer peripheral rim 81 is buried in the recessed portion 71, while being adjacent to an inner peripheral wall of the recessed portion 71 and spaced therefrom by a predetermined interval (s).

The invention discloses a planar EMI filter integrating common mode inductors, differential mode inductors and differential mode capacitors. The planar EMI filter comprises a tank type magnetic core, a panel magnetic core, common mode capacitors, integrated inductor-capacitor structures and leakage inductance layers. The common mode capacitors and the integrated inductor-capacitor structures form inductor-capacitor units. Every two inductor-capacitor units are isolated through the corresponding leakage inductance layer and are symmetrically arranged on the two sides of the corresponding leakage inductance layer. Each common mode capacitor and each integrated inductor-capacitor structure are respectively provided with a ceramic substrate and a spiral coil, wherein the ceramic substrate is provided with a plurality of via holes, and the two ends of the spiral coil are both connected with the conducting via holes. Each leakage inductance layer is provided with a plurality of insulating via holes corresponding to the via holes in each ceramic substrate. Every two common mode capacitors are connected with each other through the corresponding conducting via holes. Each common mode capacitor and the corresponding integrated inductor-capacitor structure are connected with each other through the corresponding conducting via holes. Every two integrated inductor-capacitor structures are connected with each other through the corresponding conducting via holes. By the adoption of the planar EMI filter, seamless connection between modules is achieved, parameters of the common mode inductors, parameters of the differential mode inductors and parameters of the differential mode capacitors are integrated, and the problems that in the prior art, an existing filter is large in magnetic leakage, large in size and poor in filtering effect are solved.

The invention relates to a self-power intelligent door and window sensor and a signal transmission method thereof, and belongs to the technical field of intelligent window and door sensors in which mechanical energy for opening the door is directly converted into electric energy to transmit signals and raise the alarm. An energy collection self-power module converts the mechanical energy in the door opening process into the electric energy, and provides energy for a signal reception processing module and a wireless signal transmission module; a tongue tube is placed in the energy collection self-power module; a permanent magnet module of the self-energy door and window sensor is mounted on a doorframe, and the energy collection self-power module is mounted on the door; the energy collection self-power module comprises a main casing, a soft magnet, a conductive coil and coil skeletons; and the conductive coil is wound in the central portion of the coil skeletons. The self-power intelligent door and window sensor uses the energy collection self-power module instead of an external power supply or an extra battery, the structure is simple, installation is easy, and wiring or punching is not needed during installation; the sensor can be mounted in different devices as a door, window and a safe case; and the sensor is connected with the Internet to monitor the opening/closing states of the door and window at any time via different terminals.

The invention discloses a roof photovoltaic module support, which comprises solar photovoltaic modules, roof fixing parts, side clips and middle clips. The roof photovoltaic module support has the beneficial effects that the support is easily installed, and the neat and quick installation of a roof photovoltaic power generation system is realized; during an installation process, the support, the roof fixing parts and the side clips are matched and installed together, and the second module can be inserted into a clamping groove of the roof fixing part at the side of the first module in the subsequent installation process, so that the modules can be directly installed one by one, and the calculation of the position of each roof fixing part is not needed, and thus the installation time is greatly saved, and meanwhile, the support is convenient for installation and the production efficiency is improved.

The invention discloses an off-bed detection alarm device, comprising a control module, an information acquisition unit, a main node and network modes. The information acquisition unit includes a first infrared node unit, a second infrared node unit, a first pressure node unit and a second pressure node unit, the information acquisition unit is used for acquiring the triggering state of each node and inputting the triggering states in the main node, so that the main node obtains the states of personnel to be detected through the triggering state of each node, the network nodes are used for sending the sates of the personnel to be detected to the control module, and the control module is used for monitoring the states of the personnel to be detected. By application of the device, through the triggering states acquired by the information acquisition unit, the states of the personnel to be detected can be judged. The off-bed detection alarm device can contribute to real-time monitoring of the off-bed situations of personnel in a patient ward in an old people's home, a hospital and the like, thereby improving a capability of timely handling an emergency circumstance such as falling off from bed, and the off-bed detection alarm device has the advantages of easy installation, reliability and safety, low price and the like.

The invention relates to the field of a light-emitting diode (LED) tiled screen, in particular to an LED tiled screen module box. The LED tiled screen module box comprises a square module frame which is formed by four section bar boarders. LED light sources arranged in a dot matrix mode are arranged on the front side of the module frame, and a place in the module frame and located on the back of the LED sources is provided with a module power source box which is provided with a power source and a circuit board. A connection terminal is arranged outside the power source box, and at least two rapid locking rods are arranged on two section bar boarders which are vertical to each other. The rest two section bar boarders which are vertical to each other are provided with locking holes corresponding to the positions of the locking rods. The LED tiled screen module box splices LED tiled screen module boxes through the rapid locking rods, so that not only is installation speed fast, but also the phenomenon that gaps are generated between the module boxes under the condition of being hung for a long time is avoided. Accordingly, the stable using time of the LED tiled screen is prolonged, and the phenomenon that maintenance is needed usually is avoided.

The invention relates to an overturn deforming type unilateral bolt fastener which is formed by a bolt, a jacking sleeve, an overturn deforming piece, a gasket and a nut. A bolt head and a bolt rod are in circular conical surface transition, threads are arranged at the tail of the bolt rod, and the overturn deforming piece is an annular part with certain plastic deformability. The overturn deforming piece, the jacking sleeve and the gasket are arranged on the bolt rod in a sleeved mode, and the nut is screwed at the tail of the bolt rod. In the mounting process, one side of the bolt head is stretched into a mounting hole, the operation of screwing the nut at the tail of the bolt rod is started after the bolt head reaches the inner side of the mounting hole, the nut is screwed in continually to push the jacking sleeve to move forward, the overturn deforming piece overturns in the same direction and has corresponding deformation under the dual action of the jacking sleeve and the circular conical surface of the bolt head, the effect of radial expansion is achieved, in this way, the overturn deforming piece is made to directly act on the inner side surface of the mounting hole, and the unilateral connection and fastening of a structural piece are achieved. According to the overturn deforming type unilateral bolt fastener, unilateral operation can be achieved, the connection and fastening of the structural piece can be completed, and good mechanical properties can be achieved.

The invention relates to a three-directional shafting dynamic vibration absorber and a design method thereof. The three-directional shafting dynamic vibration absorber adopts the structure as follows: mounting shaft sleeves are tightly fixed to the surface of a shafting; the outer sides of the mounting shaft sleeves and the inner sides of circular masses are connected in a vulcanizing manner through rubber components; the circular masses, the rubber components and the mounting shaft sleeves are designed into two semicircular rings respectively; clamping slots are formed in the circular masses and the mounting shaft sleeves respectively; an outer clamping hoop is clamped into the clamping slots of the two semicircular ring-shaped circular masses to abut the two semicircular ring-shaped circular masses into a circular ring; an inner clamping hoop is clamped into the clamping slots of the two semicircular ring-shaped mounting shaft sleeves to abut the two semicircular ring-shaped mounting shaft sleeves into a circular ring. The three-directional shafting dynamic vibration absorber adopts a split structure, is simple in structure and easy to mount, can achieve bending and twisting of the shafting and control of longitudinal vibration, overcomes the defects that measures needing to change the structure and the material of the shafting are complicated in implementation and relatively high in expenses, and overcomes the defects that an active vibration absorber is complicated in structure and high in producing cost and needs additional energy.

The invention relates to a hub magnetic flow variable shimmy damper of helicopter, wherein it comprises magnetic flow variable liquid 9, electromagnet 1, armature 3, and excitation coil 6 for generating magnetic field, rotation axle 4, excitation coil rotation piston 5, and semi-round liquid container 8. The magnetic flow variable liquid is poured into the chamber of liquid container; the rotation piston and the rotation axle are connected to rotate together; the magnetic flow variable liquid moves repeated in the liquid reflux channel along with the piston; via changing the input current, the output damping torque of shimmy damper can be changed. The invention can semi-automatically control ground resonance and air resonance of helicopter.