57results about How to "Uniform magnetization" patented technology

The invention discloses a modularization excitation detection device, at least comprising two single-section exciters; furthermore, a traction bracket is arranged on at least one single-section exciter; the single-section exciter is provided with a connecting part used for the rotary connection of adjacent single-section exciters. The connecting part is provided with a hole which is internally provided with a connecting bolt; the connecting part is provided with an adjusting trough which is internally provided with an adjusting bolt; furthermore, the connecting part is fixed on a first magnet cover or a second magnet cover by the adjusting bolt. By changing the number of the accessed exciters, the width of each single-section exciter and the angle between the exciters, the cables of different diameters can be magnetized and detected; the smart and changeable modularization exciter can carry out the excitation and detection of other tested parts with complex shapes such as I-steel and angle steel, etc.; the magnetic-leakage signal of the tested part can be conveniently and effectively detected by the methods of permanent magnet excitation and Hall detection.

The invention relates to a compound excitation generator for electric automobiles, which belongs to the technical field of automobile electric motors and appliances and comprises rotors, a stator, a front end cover (15), a back end cover (3) and an electronic controller (2). The compound excitation generator is characterized in that the electric excitation rotor and the permanent-magnet rotor areinstalled on a shaft (1) and separated by a residual shim (10); the electric excitation rotor and the permanent-magnet rotor share an armature winding (11), and the produced magnetic potentials are synthesized by connecting in parallel in a magnetic path; and when in use, the magnitude and the direction of the electrifying current of the electric excitation rotor are regulated, so that the magnetic field superimposed by an electric excitation magnetic field and a permanent-magnet magnetic field can be regulated to ensure that the generator can output direct current with stable voltage within wide rotating speed and load. The generator has the advantages of compact structure, convenient installation, and safe and reliable operation.

The invention provides a crankshaft magnetic detector comprising a main body and a control cabinet, wherein a head frame chunk and a tail frame chunk are arranged on a guide rail of a main body frame assembly to clamp an electrified circumferential magnetizing device, a left head-frame chunk base is fixed, the position of a right tail-frame chunk base can be moved and locked according to the length of a crankshaft, an air cylinder which is used for clamping the crankshaft is arranged behind the tail frame chunk, conducting plates which are electrified after clamping the crankshaft are respectively arranged on shafts of the head frame chunk and the tail frame chunk, and the left and right sides of the frame assembly are respectively provided with an electric case and a device pneumatic control case. The crankshaft magnetic detector is characterized in that a multiturn longitudinal magnetizing coil which can longitudinally extend is arranged between the head frame chunk and the tail frame chunk, and a workpiece rotating device is arranged on the chunk conducting plates. The crank magnetic detector can complete longitudinal magnetization or complex magnetization of the whole length of the crankshaft with a length between 800mm and 1500mm once, sufficiently and evenly magnetizes the parts of the crankshaft, is safe and reliable and has low failure rate.

The invention provides a production method of a claw pole type permanent-magnet stable-voltage electric generator and belongs to the technical field of automotive electrical machines and electric appliances. The production method comprises rotor assembly, stator assembly, end cover machining, voltage stabilizer assembly and complete machine assembly. The claw pole of a rotor converts an axial magnetization type magnetic field into a radial magnetic field, magnetic performance is good, and magnetization is uniform. A stator punched sheet is a round punched sheet formed by three equant sheets, and the utilizing rate of materials is high. A circuit board is encapsulated in a shell body of a voltage stabilizer with 191# unsaturated polyester resin, and then dust resistance, moisture resistance, vibration resistance and shock resistance are achieved. The electric voltage stabilizer enables the output voltage of the permanent-magnet electric generator to be stable under variable-speed and variable-load working conditions, and then the safety and using reliability of the automotive electric appliances are guaranteed.

A heat treating technology of magnetic device in a rotating magnetic field features that after a maganetic device is fixed to a rotary axle driven by a motor, it is arranged in a heating furnace and a magnetic field for magnetizing it uniformly.

The invention discloses a non-magnetization pipeline-interior detection method which relates to a damage detecting technology of buried metal pipelines for petroleum and natural gas. The non-magnetization pipeline-interior detection method comprises the following steps: (1) performing preliminary analysis to determine the construction duration; (2) testing the passing performance of a pipeline; (3) detecting the pipeline; (4) analyzing and processing detection data; and (5) processing data results. The non-magnetization pipeline-interior detection method overcomes various disadvantages, such as the cumbersome process of blind excavation is carried out for clearing and demagnetizing the pipeline and the final uniform magnetization is carried out on the pipeline, in an existing method for detecting local defects inside the pipeline by virtue of magnetization; according to the non-magnetization pipeline-interior detection method, the pipeline is uniformly magnetized by virtue of an earth magnetic field, and the non-magnetization and non-contact detection on the interior of the pipeline can be accomplished just by means of testing the passing performance and simply cleaning the interior of the pipeline by a pipeline cleaner so as to suck metal substances out of the pipeline by a magnet.

The invention discloses a nondestructive testing device and method for a steel wire rope. The device comprises at least one excitation mechanism group, at least one magnetic measurement mechanism anda remote terminal which are arranged sequentially in the running direction of the steel wire rope, wherein the remote terminal is in data connection with the magnetic measurement mechanism; during running of the steel wire rope, at least one round of excitation with completely opposite magnetic field directions is applied to the steel wire rope in the running axial direction of the steel wire rope, and the steel wire rope is subjected to bidirectional saturation magnetization; after saturation magnetization of the steel wire rope, the steel wire rope goes ahead continuously, remanence on the steel wire rope after magnetic fields are removed is called limit remanence, the limit remanence is tested by the magnetic measurement mechanism, processing and judging are performed by a magnetic measurement circuit, fact data is transmitted to the remote terminal, and damage to the steel wire rope is determined accurately. Remanence amount of the steel wire rope can be only related with the damage condition of the steel wire rope but not related with size of an excitation field or an excitation process, so that testing precision of steel wire rope damage condition is improved remarkably.

The invention relates to a method for operating a resistor welding apparatus. The power transmission manner on the resistor welding apparatus is not the optimum manner. The invention relates to the resistor welding apparatus with a welding transformer, the welding transformer includes first and second secondary windings which are coupled with each other, a primary winding and a synchronous rectifier. The operating resistor welding apparatus runs following a specific method, and power transmission is optimized on the system layer in the method.

The motor of the present invention comprises: a stator, a rotor rotating to the stator and a permanent magnet installed to the rotor, wherein the permanent magnet is a single body and formed continuously.

The invention discloses a device for rapidly measuring the grain size and magnetic domain wall width of an oriented silicon steel sheet. The device comprises a sample platform and a developing component, wherein the developing component comprises a display window and a contact layer; the display window is a transparent glass plate or a transparent hard plastic plate; a liquid storage cavity used for containing a developing suspension liquid is formed between the display window and the contact layer; the display window is provided with a suspension liquid injection hole used for injecting the developing suspension liquid into the liquid storage cavity and a liquid storage cavity closed hole used for balancing the internal pressure of the liquid storage cavity; the suspension liquid injection hole and the liquid storage cavity closed hole can be opened or closed as needed; a magnet yoke is arranged in the sample platform and is provided with a magnetizing winding; after being electrified, the magnetizing winding is capable of magnetizing the oriented silicon steel sheet put on the sample platform. By virtue of adopting the powder pattern method theory, the device is capable of rapidly measuring the grain size and magnetic domain wall width of the oriented silicon steel sheet.

According to the present invention, since the applied magnetic field strength is controlled so as to fall between maximum magnetic field strength×0.7 and the maximum magnetic field strength over almost an entire surface of the magnetic recording medium, there is not much variation in the strength of the applied magnetic field relative to media coercivity during DC demagnetization, which makes it possible to obtain uniform magnetization over almost the entire surface.

The invention discloses a hybrid permanent magnet memory starter/generator and an operation method thereof, and belongs to the field of permanent magnet synchronous motors. Hybrid permanent magnet memory starter/generator comprises a hybrid permanent magnet rotor, a stator iron core, armature windings, air gaps and a rotating shaft. Two sets of windings are wound on the stator iron core in the same groove and in the same direction to jointly form an armature winding which is also used for adjusting magnetism; the two sets of windings work in a series or parallel state as required; a high-coercivity permanent magnet, a low-coercivity permanent magnet and a triangular magnetic barrier are arranged on the hybrid permanent magnet rotor; two tangentially magnetized low-coercive-force permanent magnets and two radially magnetized high-coercive-force permanent magnets are arranged below each magnetic pole of the hybrid permanent magnet rotor to form a W-shaped structure; and a triangular magnetic barrier is arranged at the junction of each low-coercivity permanent magnet and each high-coercivity permanent magnet. The motor adopts alternating-current pulse magnetic adjustment; when magnetic adjustment is needed, the armature winding is used for applying magnetic adjustment pulses; the permanent magnets are placed on the motor rotor; and the motor is simple in structure, easy and convenient to machine and manufacture, and the technology is mature.

The invention discloses a water heater and a control method of the water heater. The water container comprises an inner container, a water inlet tube, a water outlet tube and a heater, and further comprises a circulating branch tube, a first control valve, a second control valve, a circulating water pump and an electromagnetic device, wherein a first interface is arranged on the water inlet tube;a second interface is arranged on the water outlet tube; one end of the circulating branch tube communicates with the first interface, and the other end of the circulating branch tube communicates with the second interface; the first control valve is in series connected between the outer end of the water inlet tube and the first interface; the second control valve is in series connected between the outer end of the water outlet tube and the first interface; the circulating water pump is in series connected on a circulating water path which is defined by the water inlet tube, the water outlet tube and the circulating branch tube; the electromagnetic device is used for magnetizing water which flows through the circulating water path; and the electromagnetic device and the heater are separately arranged. The water heater can guarantee that a water body in the inner container is uniformly magnetized, so that possibility of forming water into scales is reduced.

The invention relates to a residual magnetism flaw detection method and a residual magnetism flaw detection device for piston rings based on series-connection closed type magnetization. The N pole and the S pole of single permanent magnet 2 and a piston ring 1 form an annular magnetic loop, the penetrating-through magnetization in a circumferential direction is realized by the maximum magnetic energy density, a workpiece is scanned by multiple space sensitivity scale magnetic-sensing detection units 4' in a circumferential direction after the magnet is separated, a leakage magnetic field generated by a flaw is picked up and is converted into an electrical signal, and whether a flaw exists in the piston ring or not is judged through signal mutation. According to the residual magnetism flaw detection method, different opening gaps and a trans-scale flaw in irregular cross section of the piston ring 1 can be detected through the array type magnetic-sensing detection units 4' surrounding the piston ring 1, and the flaw detection rate is high; and besides, the problems of magnetic noise and the blind flaw detection end part in magnetic flux leakage detection of the piston ring 1 are solved and the automatic flaw detection of the piston ring 1 can be realized.

The invention provides an obliquely magnetized magnetic liquid sealing structure. The structure comprises a shaft (1), a check ring (2), an end cover (3), a first bearing (4), a first magnetic isolation ring (5), a first pole shoe (6), a first magnetic isolation sheet (7), a permanent magnet (8), a second magnetic isolation sheet (9), a second pole shoe (10), an axial bulge (101), a second magnetic isolation ring (11), a second bearing (12), a shaft shell (13) and magnetic liquid (14). The magnetic liquid sealing structure is high in pressure resistance, low in axial size and uniform in magnetic field intensity among all stages of seals, and the defects of a magnetic liquid multi-stage sealing structure are overcome.

The invention relates to a water magnetization device, which comprises a water pipe (1) and magnetic assemblies (2) arranged in the water pipe (1). The water magnetization device is characterized in that at least one group of magnetization assemblies (2) are used, are of tubular structures and are embedded in an annular casing (4); the casing (4) is sleeved by the water pipe (1); turbulent flow assemblies (3) used for separating water flow into at least two flows and enabling the water flow to realize rotational advancing in the length direction of the magnetic assemblies are arranged on the magnetic assemblies (2). Compared with the prior art, the water magnetization device provided by the invention has the advantages that the water flow is divided into a plurality of small flows; rotating eddy current is formed; the contact area of the water flow and the magnetic field is greatly increased; the water flow is subjected to uniform magnetization; the magnetization effect is obviously improved.

The invention relates to de-electronic magnetization combined activation apparatus for brackish water. The apparatus comprises a de-electronic activation device arranged on an insulating plate, the de-electronic activation device is made of a metal material, and the de-electronic activation device is of a tubular shape with two ends open; the apparatus also comprises a tubular magnetization activation device with two ends open, one end of the magnetization activation device is in insulated connection with one end of the de-electronic activation device, the magnetization activation device communicates with the de-electronic activation device, and one end, connected with the magnetization activation device, of the de-electronic activation device is provided with a grounding device; and the inner cavity of the magnetization activation device is provided with a first magnet group, a second magnet group, a third magnet group and a fourth magnet group in the axial direction. The activation apparatus for the brackish water provided by the invention can effectively improve the physicochemical properties of the brackish water.

The invention belongs to the technical field of steel pipe magnetic flux leakage detection, and discloses a laminated steel pipe magnet yoke type uniform magnetization device, which comprises a coil, an iron core and a laminated magnet yoke, the coil is uniformly wound on the outer side of the iron core, two ends of the coil are connected with a power line, the lower end of the laminated magnet yoke abutted against the surface of a steel pipe is arc-shaped, and the diameter of the arc is greater than the outer diameter of the steel pipe. Each laminated magnet yoke is formed by connecting five steel plates, the steel plates on the front side and the rear side are arranged in mirror symmetry about the middle steel plate, the number of the laminated magnet yokes is two, the distances between the corresponding steel plates of the two laminated magnet yokes are d1, d2, d3, d4 and d5 respectively, and d1 is equal to d5lt; d2 is equal to d4lt; d3, two laminated magnet yokes are fixedly connected to the left end and the right end of the iron core in a mirror symmetry mode, the two laminated magnet yokes are also in mirror symmetry about the coil, and the coil is arranged between the two laminated magnet yokes; the problem of nonuniform magnetization of the steel pipe in the prior art is solved, the consistency of defect magnetic flux leakage detection signals is improved, and the method is suitable for magnetic flux leakage detection of the steel pipe.