12 results about "Magnetic pressure" patented technology

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 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.

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.

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 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.