23 results about "Magnetic pressure" patented technology

The invention relates to the technical field of reactive power compensation, in particular to a quick response control method of a magnetic pressure mixed control type dynamic reactive power compensation device. The method comprises the following steps: predicting prediction compensation amounts at various moments in the future; according to the predicted active power and the power factor, determining a compensation amount value interval required for increasing the power factor to a preset target power factor range; according to the overall fluctuation characteristics of the predicted active and reactive power sequences and the quantitative deviation degree between each predicted compensation amount and the compensation amount value interval, determining a basic compensation amount; determining the magnetic control compensation weight at each moment according to the deviation characteristics of the active power sequence and the reactive power sequence and the instantaneous change rate of a power change curve constructed by fusing the active power sequence and the reactive power sequence; and dividing the basic compensation amount into a magnetic control compensation amount and an electric control compensation amount according to the magnetic control compensation weight, and cooperatively controlling the magnetic control compensation device and the electric control compensation device to output the compensation amount at the corresponding moment.

The application relates to the field of laser additive manufacturing, and particularly discloses a laser coaxial wire additive manufacturing device and method based on double magnetic field cooperation, which comprises a motion system, a coaxial wire additive manufacturing system, a double magnetic field auxiliary system and a control monitoring system, and is externally provided with a wire feeding mechanism. The double magnetic field auxiliary system is composed of a magnetic pressure induction system and a symmetric sliding magnetic field generation system; the magnetic pressure induction system is arranged around a welding head to generate a vertical magnetic field; the symmetric sliding magnetic field generation system generates a horizontal magnetic field through Helmholtz coils on two sides; the two magnetic field systems are independently adjustable and are orthogonally arranged in space. The device is provided with a high-speed camera to monitor the molten pool state in real time, the magnetic field strength and proportion are dynamically adjusted through a controller and double electromagnetic generators, and accurate control of molten drop transition and molten pool flow is realized. The application improves the quality and stability of coaxial wire additive manufacturing.

The invention relates to the technical field of magnetic sheath pressure balance analysis, in particular to a magnetic sheath pressure balance analysis method based on an IMF clock angle box. According to the technical scheme, the method comprises the following steps: data acquisition: acquiring plasma data, magnetic field data and interplanetary magnetic field IMF parameters of an earth magnetic sheath region in a target time period; and the IMF clock angle box is used for calculating an IMF clock angle based on the IMF parameters. The system analysis method based on the IMF clock angle box is established, and the problems of rough classification and information loss caused by the fact that traditional research only depends on an IMF single component are solved; according to the method, quantitative statistics of the dynamic balance characteristics of the hot pressure and the magnetic pressure is realized, and the independence and coupling influence of each component of the IMF on the pressure fluctuation can be determined through the regression model, so that a direct and reliable observation analysis tool is provided for deeply understanding the physical process of the magnetic sheath and constructing an accurate space weather model.

The invention discloses a permanent magnet pressure compensator and a control method and relates to the technical field of hydraulic pressure. The iron core abuts against the step of the valve body through the guide sleeve. The permanent magnet fixedly sleeves the outer side of the guide sleeve and is connected with the step of the iron core; the armature is slidably arranged in the guide sleeve, and a magnetic isolation sheet is arranged between the armature and the iron core; the push rod is slidably arranged in the iron core, one end of the push rod is fixedly connected with the armature, and the other end of the push rod extends into the P2 cavity and is attached to the compensator valve element. Magnetic lines generated by the permanent magnet on the guide sleeve form a closed loop through the armature, the iron core, the housing and the valve body, force in the axial direction of the armature is generated on the armature, when oil enters, pressure P0 enters the cavity P1 through a step on the valve body, meanwhile, hydraulic oil flows to the right end face of the compensator valve element, and resultant force of leftward thrust FP1, F and FP2 is generated and compared with the FP1. The pressure difference value before and after the valve body loads the valve port is a constant value. If the opening degree of the load valve port of the valve body is not changed and the pressure difference value is not changed, the flow of the execution element is stable and not changed.

The invention belongs to the field of electromagnetic forming, and particularly discloses a workpiece electromagnetic forming numerical simulation modeling method and system.The method comprises the steps that a trained first full-connection deep neural network model is adopted, and a tangential magnetic field component is calculated according to workpiece deformation real-time surface coordinates and normal vectors; dynamic magnetic pressure is generated in combination with a magnetic pressure correction coefficient output by the trained second full-connection deep neural network model; and applying the magnetic pressure to a mechanical model of the workpiece as a surface load, and iteratively solving a bidirectional coupling effect of workpiece deformation and an electromagnetic field. The problem that an existing workpiece electromagnetic forming modeling method cannot be compatible in the aspects of calculation efficiency, geometric adaptability and physical consistency is solved.

The application relates to the technical field of magnetic suspension driving and discloses a single-side oblique thrust repulsion magnetic suspension dynamic device based on a Halbach array, which comprises a magnetic field generating module and a magnetic field responding module which are oppositely arranged and form a magnetic suspension working gap, and the two form a magnetic repulsion relationship of same polarity in the magnetic suspension working gap. A Halbach array group is composed of at least three magnetic units, each magnetic unit is arranged according to a phase progressive magnetization angle sequence, and under the premise of keeping the relative phase progressive relationship unchanged, the whole is integrally superposed with a bias rotation angle and / or adopts a non-uniform and asymmetric geometric size distribution, so that a single-side enhanced magnetic field distribution is formed on a working side, a back-to-back closed magnetic field distribution is formed on a back side, and an inclined synthetic magnetic pressure distribution is formed in the magnetic suspension working gap; the synthetic magnetic pressure distribution is decomposed into a normal suspension force component and a tangential driving force component, so as to realize non-contact support and intrinsic oblique thrust output. The device is suitable for linear, annular and curved surface topological expansion.

The utility model relates to the technical field of non-magnetic pressure-bearing drill rods, and discloses a high-performance non-magnetic pressure-bearing drill rod which comprises a drill bit and a first drill rod, a first connecting block is fixedly connected to the periphery of the drill rod, a dismounting assembly is installed in the first connecting block, and a protection assembly is installed on the periphery of the first drill rod. The dismounting assembly comprises a pull rod, the periphery of the pull rod is slidably connected with the interior of the first connecting block, a second clamping groove is formed in the first connecting block, a second clamping block is fixedly connected to the top of the drill bit, and the second clamping block is connected with the pull rod and the second clamping groove in a clamped mode. According to the utility model, the pull rod is pulled, the pull rod is separated from the clamping block through the cooperation of the spring and the gasket, and then the drill bit can be easily dismounted or mounted through rotation and clamping operation, the drill bit of the drill rod is simple and convenient to replace, the flow is clear without complex procedures, the time is saved, the replacement efficiency is improved, and efficient construction is assisted.

This utility model relates to a magnetic pressure-relieving scraping device, including a handle, a negative pressure air pump inside the handle, a scraping head at the lower end of the handle, a negative pressure air nozzle inside the scraping head for use with the negative pressure air pump, an air hole on the outer edge of the negative pressure air nozzle, and a magnetic pressure-relieving device inside the scraping head. The magnetic pressure-relieving device includes a magnetically movable component, and a magnetically attached assembly corresponding to the air hole is located at the inner end of the magnetically movable component. In use, the magnetic pressure-relieving device and the air hole are manually controlled to extend and retract, achieving the effect of pressure relief and negative pressure. The structure is simple, the pressure relief operation is convenient, and it can effectively reduce costs.

Permanent mold (1) for producing a component (2) with at least two mold halves (3, 4) movable relative to each other between an open position and a closed position, wherein the mold halves (3, 4) each have at least one forming surface (5, 6) which, in the closed position of the mold halves (3, 4), define a cavity forming the component (2), and with a device for demolding the component (2) from one of the mold halves (3, 4), characterized in that the device for demolding the component (2) comprises at least one coil (23) electrically connected to a pulse generator (25), which is arranged in such a way in an area adjacent to the forming surface (5, 6) of at least one mold half (3, 4),that by transmitting a short current pulse from the pulse generator (25) into the coil (23), a time-varying magnetic field can be generated in the vicinity of the coil (23) and an opposing magnetic field in the component (2) made of an electrically conductive material, and that this creates a magnetic pressure force (31) acting on the component (2), by means of which the component (2) can be demolded from the mold half (3, 4) which receives the coil (23) when the mold halves (3, 4) are in the open position.

This invention relates to a 6000m-class non-magnetic pressure-resistant sealed chamber and its manufacturing method, belonging to the field of deep-sea equipment. The 6000m-class non-magnetic pressure-resistant sealed chamber includes: a chamber body having a cavity for housing deep-sea exploration equipment; openings at both ends of the cavity along its axial direction for sealing connection with end caps; the chamber body is a multi-layered composite structure, comprising, from the inside to the outside of the cavity, a skeleton layer, a first composite pressure-bearing layer, and a waterproof protective layer, which are sequentially and fixedly connected. The skeleton layer has low permeability and supports the first composite pressure-bearing layer, preventing water from the cavity from penetrating into it. The first composite pressure-bearing layer withstands deep-sea pressure, and the waterproof protective layer provides waterproof protection for the first composite pressure-bearing layer. This invention improves the watertightness and structural stability of the sealed chamber, ensuring stable operation of the equipment inside.

A device for generating a variable angular momentum for attitude control of a spacecraft includes a rotor and a stator on which the rotor is mounted and a means for driving the rotor via a rotating magnetic field. A bearing is formed by a fluid film of a ferrofluid between opposite bearing surfaces of the rotor and the stator. The fluid film is interrupted by one or more gas inclusions. The bearing preferably extends about the central axis over a region that has a smaller radius than the rotor. One or more permanent magnets are arranged on the rotor or on the stator in the region of the bearing, wherein the ferrofluid is held in a fixed position relative to the rotor or the stator and a magnetic pressure is generated in the ferrofluid by the one or more permanent magnets.

The invention relates to the technical field of emergency maintenance of gas pipelines, in particular to an external magnetic pressure fitting type under-pressure plugging method for a gas pipeline, which adopts a complete external operation and zero-fire risk magnetic pressure fitting type plugging method, dynamically adapts to the external contour curvature of the pipeline through an arc-shaped electromagnet, and is combined with an anti-corrosion sealing material. The gas pipeline leakage point online plugging method has the beneficial effects that the gas pipeline leakage point online plugging is realized, the plugging time is saved, the plugging efficiency is improved, the sealing effect is good, and the sealing safety is high.

To simulate a supersonic flight environment that enables evaluation of plasma under hypersonic conditions, by using a compact device.SOLUTION: The device includes: an acceleration chamber 3 with a dielectric container 31 having an acceleration space 3s communicating with a measurement space 2s of a measurement chamber 2 and a coil 32 provided around the outer periphery of the dielectric container 31, the coil 32 having an axis X extending within the acceleration space 3s toward the measurement space 2s; and a power supply for applying a current to the coil 32. When a current is applied from the power supply to the coil 32, a magnetic pressure gradient is formed in the acceleration space 3s such that a side closer to the measurement space 2s along the axis X has a lower magnetic pressure, thereby accelerating plasma P within the acceleration space 3s toward the measurement space 2s.SELECTED DRAWING: Figure 1

The application discloses a marine towed vector magnetic gradient instrument, which comprises a deck unit and a towed body, the towed body comprises a non-magnetic pressure-bearing shell, a non-magnetic mounting framework and a tail wing fixedly arranged at the tail of the non-magnetic pressure-bearing shell, the non-magnetic pressure-bearing shell is fixedly sleeved outside the non-magnetic mounting framework and cooperatively forms a closed chamber, the non-magnetic mounting framework in the closed chamber is fixedly connected with a magnetic gradient measuring module for measuring magnetic data, an acquisition module for acquiring magnetic data and a power module for supplying power to the magnetic gradient measuring module and the acquisition module, the deck unit is electrically connected with the acquisition module and the power module through a tension cable, the deck unit obtains electricity through an external power supply, and the deck unit is further provided with a data output end for data interaction. The application simultaneously realizes the functions of magnetic force vector measurement, scalar measurement, vector gradient measurement and scalar gradient measurement.

The present application relates to the technical field of reactive power compensation, and particularly relates to a quick response control method of a magnetic pressure mixed control type dynamic reactive power compensation device. The method predicts the predicted compensation amount at each future moment; according to the predicted active power and power factor, the compensation amount value interval required to improve the power factor to the preset target power factor range is determined; according to the overall fluctuation characteristics of the predicted active and reactive power sequences and the quantitative deviation degree between each predicted compensation amount and the compensation amount value interval, the basic compensation amount is determined; according to the deviation characteristics of the active and reactive power sequences and the instantaneous change rate of the power change curve constructed by fusing the active and reactive power sequences, the magnetic control compensation weight at each moment is determined; the basic compensation amount is divided into the magnetic control compensation amount and the electric control compensation amount according to the magnetic control compensation weight, and the magnetic control compensation device and the electric control compensation device are cooperatively controlled to output the compensation amount at the corresponding moment.

This invention provides a flexible inductive magnetic pressure sensor, comprising a magnetoelastic body unit, a magnetic sensing unit, and a magnetic rebound unit arranged sequentially from top to bottom, wherein the magnetization directions of the magnetoelastic body unit and the magnetic rebound unit are opposite. This invention also provides a flexible inductive magnetic pressure sensor array. Compared with the prior art, this invention utilizes the mutual repulsive force between the magnetoelastic body unit and the magnetic rebound unit with opposite magnetic poles to achieve rapid rebound of the magnetoelastic body, thereby reducing the hysteresis behavior of the inductive magnetic pressure sensor.

The invention discloses a high-efficiency energy-saving magnetic voltage regulator, which comprises a mounting base, an iron core, a box body and a winding group wound on the iron core, and also comprises a heat dissipation assembly which is mounted on the box body, is used for carrying out heat dissipation treatment on a closed cavity in the iron core and comprises a first piston plate, a linear motion part and a heat dissipation pipe; the mounting assembly is mounted on the box body, is used for limiting the box body on the mounting base, and comprises a second piston plate, a first push rod, a mounting plate and an abutting plate; the vibration assembly is mounted in the box body, is used for performing vibration treatment on the heat dissipation pipe, and comprises a placement box, a third piston plate, an annular plate and an annular plate; and the ejection assembly is mounted on the box body, is used for ejecting the box body out of the mounting base, and comprises a cylinder body, a fourth piston plate and a second push rod. The invention relates to the technical field of voltage regulators. According to the invention, heat dissipation processing can be carried out on the voltage regulator iron core and the winding group.

The utility model provides a novel magnetic pressure-reducing ring which comprises an inner ring and an outer ring, and the inner ring is coaxially and rotatably connected to the inner side of the outer ring; the inner ring comprises an upper ring body and a lower ring body, and the upper ring body is in threaded connection with the lower ring body; when the upper ring body is connected with the lower ring body, the inner peripheral walls and the outer peripheral walls of the upper ring body and the lower ring body are flush with each other; a plurality of first magnetic parts are fixedly arranged on the outer circumferential wall of the upper ring body at intervals, containing grooves are formed in the positions, corresponding to the first magnetic parts, of the inner circumferential wall of the outer ring, and second magnetic parts are movably arranged in the containing grooves. The utility model has the characteristic of reasonable structure.

The present invention discloses a method for preventing voltage saturation during a vehicle's dynamic process. By slowing down the acceleration rate, the present invention can improve the actual speed following effect, reduce the required Q-axis current, reduce the weakening magnetic pressure of the D-axis current loop, and alleviate the problem of limited bandwidth of the weakening magnetic loop and inability to converge in time. When the D-axis weakening magnetic current has reached the weakening magnetic limit point, the method reduces the Q-axis current from another dimension through the intervention of the speed outer loop, thereby achieving the effect of the weakening magnetic zone 2. Because the loop only acts on the acceleration and does not intervene in the steady-state operating point, the problem of reduced efficiency caused by inappropriate selection of open-loop weakening magnetic feedforward will not be encountered. The present invention does not require a large amount of offline calibration, thereby shortening the development cycle.

The invention belongs to the technical field of flexible electronics, and discloses a magnetic pressure sensor with low detection limit and wide sensing range, and a preparation method and application thereof. The device adopts a multi-layer structure combining a force-magnetic conversion unit and a magnetic sensing unit, force-magnetic conversion is realized mainly based on a magnetoelastic effect of a magnetoelastic body in the force-magnetic conversion unit, and pressure is indirectly detected by combining a giant magneto-impedance effect of a magnetic amorphous wire in the magnetic sensing unit. The cilium-shaped force-magnetic conversion unit ensures significant magnetic field change under small pressure, and the high-modulus force-magnetic conversion unit of the thin film structure dominates magnetic field regulation and control in a large pressure range, so that full-scale high-efficiency-magnetic conversion is realized, and wide-scale detection of small pressure and large pressure is further realized. The device designed by the invention can simultaneously have low detection limit and wide pressure sensing range, and has good application prospects in the fields of human health monitoring, intelligent prostheses, intelligent medical treatment and robots.

The invention relates to the technical field of magnetic suspension driving, and discloses a single-side oblique thrust repulsion magnetic suspension power device based on a Halbach array, which comprises a magnetic field generation module and a magnetic field response module which are oppositely arranged and form a magnetic suspension working gap, and the magnetic field generation module and the magnetic field response module form a homopolar opposite magnetic repulsion action relationship in the magnetic suspension working gap. The Halbach array group is composed of at least three magnetic units, each magnetic unit is configured according to a phase progressive magnetization angle sequence, and on the premise that the relative phase progressive relation is kept unchanged, bias rotation angles are integrally superposed and / or non-uniform and asymmetric geometric dimension distribution is adopted. Unilateral enhanced magnetic field distribution is formed on the working side, loopback closed magnetic field distribution is formed on the back side, and inclined synthetic magnetic pressure distribution is formed in the magnetic suspension working gap; the resultant magnetic pressure distribution is decomposed into a normal suspension force component and a tangential driving force component to realize non-contact support and intrinsic oblique thrust output. The device adapts to linear, annular and curved topology extension.

The invention relates to a method and a device for restraining and correcting a high-speed moving object based on magnetic pressure, the high-speed moving object moves in a magnetic field generated by a space positive and negative pole magnet, and an action force close to the center of a coil is applied to the object by utilizing the interaction of the induction current of the object and the space magnetic field; and the ballistic constraint and correction effects are achieved. The magnetic field generated by the positive and negative magnets can be a permanent magnetic field or an electromagnetic field, and the magnetic field at the junction of the two magnets is enhanced instead of counteracting each other under the action of the positive and negative magnets. Based on interaction of space magnetic fields generated by a high-speed moving object and the positive and negative magnets, direct contact is avoided, and the device has the advantages of being high in magnetic field constraining force, good in ballistic correction effect and good in system stability.

1. Name of this product design: Magnetic Pressure Demonstration Device. 2. Purpose of this design product: for demonstration experiments. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the design points: three-dimensional picture.