163results about How to "Improve anti-offset performance" patented technology

The invention discloses a dynamic wireless charging apparatus and a parameter acquiring method thereof. The dynamic wireless charging apparatus comprises an energy emitting module and an energy receiving module. The energy emitting module comprises a high-frequency inversion unit, an LC filter unit, a first compensation unit, and a power emitting coil which are successively connected. The high-frequency inversion unit converts DC power into high-frequency AC power. After the high-frequency AC power is adjusted by the LC filter unit and the first compensation unit, energy is emitted in a high-frequency magnetic field coupling mode. The energy receiving module comprises a power receiving coil, a second compensation unit, and an uncontrolled rectification unit which are successively connected, and converts received high-frequency AC power into DC power supplied to a load. The dynamic wireless charging apparatus may automatically adjust the current of a primary-side power coil according to the mutual inductance coupling degree of the power coil so as to obtain a characteristic maintaining stable output power, is suitable for dynamic wireless charging application occasions with a wide bias, and has high transmission efficiency and a soft switch characteristic. In addition, compensation topology provides a primary side inversion power supply with a zero-load current-limiting protection function.

The invention relates to a free hydraulic forging press comprising a frame press body, a mobile worktable and a hydraulic cylinder, wherein the frame press body comprises an upper cross beam, a sliding block, upright posts and a lower cross beam, and the mobile worktable is connected with the press body. The free hydraulic forging press is characterized in that the frame press body is in an integral pre-stressed structure, that is to say, each upright post is in a hollow structure; a pre-stressed pull rod penetrates through and is arranged in a center hole of each upright post and extends outof the upper cross beam and the lower cross beam; pre-stressed nuts are respectively arranged at the end part of each pre-stressed pull rod; a plunger piston unbalance loading resisting mechanism is arranged on the hydraulic cylinder; a guide device is arranged between the upright post and the sliding block; a stepped mobile mechanism is arranged below the mobile worktable; and a leveling device is arranged below the mobile worktable. The invention has the advantages of large nominal force, strong unbalance loading resistance, long sliding stroke and the like; and the mobile worktable has long moving stroke.

The present invention provides an electric vehicle wirelessly powered type electromagnetic coupling mechanism. On the basis of the segmented guide rail power supply mode, a primary-side energy transmission mechanism adopts a T-shaped magnetic core and an L-shaped coil, so that the self-inductance value is reduced. Meanwhile, the resonant voltage is reduced and the safety of the system is guaranteed. The internal resistance of the coil is reduced and the system efficiency is improved. A secondary-side energy pickup mechanism adopts the multi-coil parallel mode, so that the electric energy pick-up capability of a pickup terminal is optimized. Therefore, the pick-up power is greater. The anti-offset capability of energy transmission is improved and the power transmission stability is ensured.

The invention discloses a high-speed fine press having a structure that one end of a double-crank rod which has 180-degree phase difference is connected with a movable slide block by a main connecting rod, the other end of the double-crank rod is connected with an auxiliary slide block by an auxiliary connecting rod, same multiple-rod branch chains are symmetrically arranged at the left sides and the right sides of the movable slide block and a pressing slide block so as to connect the movable slide block and the pressing slide block together; the movable slide block makes reciprocation movement up and down under the drive of the double-crank rod and the main connecting rod so as to push a lower connecting rod, an upper connecting rod and a swinging block to swing at two sides through the push of push rods of the two multiple-rod branch chains, and the pressing slide block is further driven to do reciprocation movement up and down, and a workpiece is placed under the pressing slide block, therefore, the pressing processing of metal or nonmetal workpieces is completed. A parallelogram structure of a movable branch chain of the invention can ensure that the pressing slide block is always kept in a horizontal position and the force at horizontal direction of the pressing slide block can be balanced by a mechanism, thereby the capability of uneven loading resistance and the machining precision of the press are enhanced.

The invention provides a hydraulic system of a stepless speed regulation hydropress, belongs to the hydraulic system of a hydropress, and solves the problems that an existing deviation-rectifying synchronous control system is not high in control precision and has a bad capability of resisting unbalance loading. The hydraulic system comprises a first hydraulic cylinder, a second hydraulic cylinder, a sliding block, a first flow pump, a second flow pump, a third flow pump, a first servo valve, a second servo valve, a third servo valve and a fourth servo valve, wherein the first flow pump, the second flow pump and the third flow pump are respectively driven by a first motor, a second motor and a third motor. By applying the hydraulic system, the stepless speed regulation can be available within a certain scope, and the problem that a stepless speed regulation technology of a traditional hydropress is narrow in adaptive aspect is solved; according to different speeds, a different quantity of flow pumps are used; the direct return of large-flow high pressure liquid to an oil tank is avoided, so that the energy can be effectively saved; when one small flow pump and the servo valve connected with the small flow pump are adopted for synchronous regulation, the precision of synchronization between the first hydraulic cylinder and the second hydraulic cylinder is effectively improved, and the unbalance loading resistance capability of equipment is improved.

The invention relates to a weight detection device, in particular to an ice coating detection device for a cable. The ice coating detection device comprises a fiber grating wavelength modulator, an optical divider and a fiber grating weighing sensor, wherein the fiber grating wavelength modulator is connected with the optical divider through a signal transmission optical cable; the optical divider is connected with the fiber grating weighing sensor through a signal transmission optical cable; the upper end of the fiber grating weighing sensor is fixedly suspended, and the lower end of the fiber grating weighing sensor is connected with the cable; an elastic body is arranged in the middle of the fiber grating weighing sensor; the elastic body is provided with the fiber grating sensor; a broadband light source is arranged in the fiber grating wavelength modulator; the broadband light source is transmitted to the fiber grating sensor through a signal transmission optical cable; the fiber grating sensor is used for transmitting a wavelength signal of reflected light of the broadband light source to the fiber grating wavelength modulator; and the fiber grating wavelength modulator is used for obtaining the weight change of the cable according to a received wavelength signal. Due to the adoption of the ice coating detection device, the ice coating condition of the cable can be effectively detected.

The invention discloses an induction type wireless electric energy transmission system with strong anti-offset capability, and belongs to the field of wireless electric energy transmission. The invention aims to solve the problem of poor offset resistance of the traditional compensation topology. An output voltage of an inverter circuit is provided for a load through a rectification circuit afterpassing through a primary side compensation topology, a loose coupling transformer and a secondary side compensation topology; the primary side compensation topology, the loose coupling transformer and the secondary side compensation topology are equivalent to a compensation topology controlled source model; a ratio relationship between the output voltage of the secondary side compensation topology and the input voltage of the primary side compensation topology is obtained; according to the target ratio relation, primary side coil self-inductance and secondary side coil self-inductance of theloose coupling transformer, equivalent impedance corresponding to the compensation inductor L1 and the compensation capacitor C1, equivalent impedance corresponding to the primary side coil self-inductance and the compensation capacitor C2, equivalent impedance corresponding to the secondary side coil self-inductance and the compensation capacitor C3, and equivalent impedance corresponding to thecompensation capacitor C4 are determined. According to the invention, the anti-offset capability of the system can be remarkably improved, and zero-phase angle input is realized.

The invention discloses an electrically-controlled multifunctional combined proportional variable axial plunger pump which comprises a plunger pump main body and a variable mechanism, wherein the variable mechanism is arranged on one side of the plunger pump main body. The plunger pump main body comprises a pump body and a variable disk which is arranged inside the pump body, the variable mechanism comprises a variable plunger, a first oil cavity and a second oil cavity, the variable plunger is connected with the variable disk, the first oil cavity and the second oil cavity are formed at the two ends of variable plunger, and a hydraulic control system is further arranged on the outer side of the pump body. The hydraulic control system comprises a controller, a servo proportional valve, a transitional plate, a position detection mechanism and a pressure detection mechanism, wherein the servo proportional valve is connected with the controller and is used for controlling the flow quantity of oil, the position detection mechanism is used for monitoring the position of a plunger, the pressure detection mechanism is used for monitoring the pressure in the oil outlet of the plunger pump main body, the transitional plate is mounted on the outer side of the pump body, the transitional plate is provided with two oil outlets, the two oil outlets are communicated with the first oil cavity and the second oil cavity respectively, and the position detection mechanism and the pressure detection mechanism are respectively connected with the controller. The electrically-controlled multifunctional combined proportional variable axial plunger pump has the advantages that the flow quantity, the pressure and the power of a hydraulic pump can be controlled simultaneously, and energy consumption is low.

There are provided a release agent capable of attaining a toner excellent in an anti-offset property and an anti-filming property, without detaching from a kneaded mass even in a case of granulating by heating a dispersion medium containing the kneaded mass, as well as a toner using the release agent and a manufacturing method thereof. A release agent containing a compatible site having compatibility with the binder resin and a releasing site chemically bonded with the compatible site and having the releasing ability is used as the release agent when preparing a kneaded mass by melt-kneading at least a binder resin, a colorant, and a release agent, whereby detachment of the release agent from the kneaded mass can be prevented in producing particles of kneaded mass as the toner particles by mixing the kneaded mass to an aqueous medium prepared and heating and stirring them.

A hydraulic support device and supporting method based on extending in roadway, comprising a hydraulic support I (301) disposed at a front end of the roadway, a hydraulic support II (302) disposed ata rear end of the roadway, and a fulcrum connecting device arranged between the hydraulic support I (301) and the hydraulic support II (302) and embedded in the bottom surface of the roadway, throughthe hydraulic support I (301) and the hydraulic support II (302), the roadway is supported and protected, and through the fulcrum connecting device, the hydraulic support I (301) and the hydraulic support II (302) are connected to each other and supported by each other, and are no longer separately supported on the respective working faces, thereby improving the reliability of the roadway support.

The invention provides an energy absorbing element. The energy absorbing element comprises two first mounting plates, two bent plates which are connected at interval positions of the two first mounting plates and distributed symmetrically, and an energy absorbing piece which stretches along the symmetric axes of the two bent plates and has two opposite ends respectively and fixedly connected withthe two first mounting plates, the bent plates comprise bent bodies and two connecting parts which are positioned at two opposite ends of the bodies and respectively connected with the two first mounting plates; the bent positions of the bodies are provided with grooves, and the thicknesses of the connecting parts are less than that of the bodies; the invention further provides an energy absorbingdevice. Cooperation among the first mounting plates, the bent plates and the energy absorbing piece is adopted, by accurately reducing local structure strength of the bent plates, the energy absorbing piece is subjected to folding shrinkage deformation along the symmetric axes of the two bent plates in the process of collision, and an additional guiding structure does not require to be arranged,thereby solving the problems that the energy absorbing device is unable to bear eccentric load under the condition of not having a guiding structure to support and a backward moving space is reservedwhen the guiding structure needs installing.

The invention discloses a dual-cylinder dual-frame plate-and-frame hydraulic press having a large table surface and capable of bearing 20,000 tons or 30,000 tons. The hydraulic press comprises a chassis and a workbench arranged on the chassis, wherein the chassis consists of a plurality of independent plates and frames which are arranged in parallel; and the plates and the frames are breadthwise pre-tightened and fixed through a plurality of groups of high-strength screw rods arranged up and down to form two groups of plate-and-frame chassis. The upper part of the inside of the chassis is fixed with a downward master hydraulic cylinder and four quick hydraulic cylinders which are positioned in the corners of the master hydraulic cylinder; the piston of each quick hydraulic cylinder is fixed with a downward guide post; the lower end of a plunger piston of the master hydraulic cylinder is fixed with a walking beam of which the four corners are fixed on the four guide posts; the four corners at the lower part of the chassis are also provided with four levelling hydraulic cylinders corresponding to the quick hydraulic cylinders; and the pistons of the levelling hydraulic cylinders are fixed to the lower ends of the guide posts. The dual-cylinder dual-frame plate-and-frame hydraulic press having the large table surface has the advantages that: the bias load resisting capacity is improved; the distortion of the chassis of the press is reduced; the parallelism between a slide block (namely the walking beam) and the workbench, and the operating verticality of the slide block in the working stroke of the press are ensured; and the weight and cost of equipment are reduced remarkably.

The invention discloses a vertical imposed load device of a hydraulic support, relates to the field of a test device of the hydraulic support, and aims at providing an adaptive test device for the hydraulic support. A test device for a vertical imposed load of the hydraulic support comprises a base (1), a double-spherical-hinge oil cylinder (2), a loading platform (3), a gas adjustment mechanism (4), a first guide rail (5) and a stand column (6), wherein the stand column (6) is inserted into the base (1) and is fixed in the base (1) through a hinge pin or welding; the first guide rail (5) is fixed on the stand column (6); the gap adjustment mechanism (4) is fixed on the loading platform (3); one end of the double-spherical-hinge oil cylinder (2) is fixed on the loading platform (3), and the other end of the double-spherical-hinge oil cylinder (2) is fixed in the base (1); the loading platform (3) can slide along the first guide rail (5) up and down. The test device for a vertical imposed load of the hydraulic support can perform tests of support performance and contraction allowance performance of the hydraulic support, has the characteristics of strong bias load resisting ability and gap adjustability, and can be effectively leveled.

The invention discloses an electric proportional variable axial plunger pump comprising a plunger pump body and a variable mechanism arranged on one side of the plunger pump body. The plunger pump body comprises a pump body and a variable tray arranged inside the pump body. The variable mechanism comprises a variable piston connected with the variable tray and a first oil chamber and a second chamber which are formed at two ends of the variable plunger. A hydraulic control system is further arranged on the outer side of the pump body, and comprises a controller, a proportional direction value, a transition plate and a detection mechanism, wherein the proportional direction value is connected with the controller and used for controlling flow of oil, the detection mechanism is used for detecting the position of the variable piston, the transition plate provided with two oil outlets is mounted on the outer side of the pump body. The two oil outlets are communicated with the first and second oil chambers respectively, the proportional direction valve is mounted on the transition plate, and the detection mechanism is connected with the controller. The electric proportional variable axial plunger pump has the advantages of simplicity in control, high reliability and repeat accuracy, and emission can be regulated in real time during operation.

The invention relates to a large eccentric load multifunctional forging hydraulic machine. The large eccentric load multifunctional forging hydraulic machine is composed of upper cross beams, lower cross beams, four stand columns, pull rods, nuts, a sliding block with a cylinder, a side cylinder and a return cylinder. A movable workbench is arranged on the lower cross beams. The forging hydraulic machine is characterized in that the sliding block with the cylinder and the four stand columns are provided with mutually matched guiding devices; the side faces of all corners of the sliding block with the cylinder are each provided with a groove; the three side faces adjacent to each groove are each provided with a guide rail assembly, and the three side faces adjacent to each stand columns are each provided with a fixing guide plate matched with the corresponding guide rail assembly, so that a four-corner twelve-face overall guiding structure with the anti-eccentric load capacity of the hydraulic machine is formed; and a workbench detecting transmission device is mounted on the lower cross beams. The hydraulic machine has the advantages that the anti-eccentric load capacity of a press can be greatly improved, the hydraulic machine is prevented from being damaged, the service life is prolonged, and the user input cost is lowered; a mechanical transmission mode meets the hot die forging using requirement and is accurate in detection without being influenced by high temperatures, and the quite high sensitivity is maintained all the time under the high frequency application working condition. The forging requirements of various workpieces are met, and the workpiece quality and production efficiency are improved.

The invention provides a designing method of a constant-pressure oil supply type load-deflection resistance horizontal type servo oil cylinder. The horizontal type servo oil cylinder comprises a cylinder body, a cylinder cover and a piston rod, wherein a guide sleeve of the cylinder cover is provided with oil pads not symmetrical up and down in the axis direction, the oil pad on the lower side of the piston rod is a supporting oil pad, the oil pad on the upper side of the piston rod is a bearing reaction oil pad, a hydraulic loop in front of a center oil inlet of each oil pad is connected with a damper, an independent oil supply system supplies pressure oil to the oil pads at the same time, and the pressure of the pressure oil provided by the oil supply system keeps unchangeable. According to the servo oil cylinder designed according to the method, in the whole working process, the piston rod and a piston keep a certain gap all the time, the guide sleeve and the cylinder body also keep a certain gap all the time, oil film lubrication is formed, friction between the piston rod and the guide sleeve as well as between the piston and the cylinder body is reduced, the bearing capacity and the load-deflection resistance capacity of the system are improved, the reliability of the horizontal type servo oil cylinder is greatly improved, and the service life of the horizontal type servo oil cylinder is prolonged greatly.

The invention discloses a tension and torsion double-component strain sensor and relates to the technical field of sensors, particularly to the improving technology of strain sensors. The tension and torsion double-component strain sensor comprises a lower threaded flange connector, an upper threaded flange connector and bearing columns; both the lower threaded flange connector and the upper threaded flange connector are of a cylindrical structure; the bottom surface of the lower threaded flange connector and the top surface of the upper threaded flange connector are provided with transverse grooves and longitudinal grooves respectively, and the transverse grooves are perpendicular to the longitudinal grooves; the four bearing columns are vertically arranged and connected between the lower threaded flange connector and the upper threaded flange connector and evenly distributed on the circumference which takes the axis of the lower threaded flange connector as the center; a strain sheet for measuring axial tension is adhered to the center of the four bearing columns; strain sheets for measuring torsion are adhered to the roots of the four bearing columns. The tension and torsion double-component strain sensor solves the problems of poor unbalance loading resisting capacity and large position errors of sensors due to influence of the processing precision during the mechanical machining of elastomers of existing strain sensors.

The invention relates to the technical field of rail type dynamic wireless charging, and particularly discloses a guide rail type dynamic wireless charging system capable of correcting the position and a position correcting method thereof. A primary side structure of the system comprises multiple sections of guide rail type wireless energy transmitting coils and multiple sections of guide rail type primary side position detecting coils arranged on the two sides of the multiple sections of guide rail type wireless energy transmitting coils. A secondary side structure comprises a wireless energyreceiving coil matched with the multiple sections of guide rail type wireless energy transmitting coils and a secondary side position detection coil arranged above the wireless energy receiving coil.The current change of the primary side position detection coil is detected to reflect the coupling condition change of the primary side position detection coil and the secondary side position detection coil, so that the position deviation condition of the secondary side structure is detected, the position of the secondary side structure is further adjusted, the position deviation detection precision of the guide rail type dynamic wireless charging system is improved, the deviation resistance of the guide rail type dynamic wireless charging system is improved, and efficient energy transmissionof the primary side structure and the secondary side structure is achieved.

The invention relates to the technical field of unmanned aerial vehicle wireless charging, and in particular discloses an unmanned aerial vehicle electric field coupling mechanism, a wireless chargingsystem, a platform and an unmanned aerial vehicle. The unmanned aerial vehicle electric field coupling mechanism comprises a transmitting end and a receiving end, the transmitting end comprises a transmitting end upper circular truncated cone and a transmitting end lower circular truncated cone which are separated from each other by a first preset height, and the receiving end comprises a receiving end hollow upper circular truncated cone and a receiving end hollow lower circular truncated cone which are separated from each other by a second preset height; the transmitting end is made of solid insulating materials, the outer side face is covered with first metal foil, the receiving end is made of light insulating materials, and the inner side face is covered with second metal foil. Insulating isolation layers are arranged on the outer surface of the first metal foil or/and the outer surface of the second metal foil. The coupling mechanism can improve the anti-offset capability of thecharging system and reduce the flight power consumption of the unmanned aerial vehicle, the cost is low, too high voltage and current impact is not generated in the moving-in and moving-out processesof the unmanned aerial vehicle, and when metal conductors exist between the coupling mechanisms or around the coupling mechanisms, eddy current loss of the conductors cannot be caused.