59results about How to "Uniform magnetization" patented technology

The invention discloses a magnetizing device and method for preparing magnetized water for dust fall of an underground coal mine. The device is formed by collecting a plurality of magnet drums in a U-shaped arrangement mode by using connecting bends in parallel, wherein each of the magnet drums is composed of an external magnet, an internal magnet, a hollow pressure-proof pipe, a spiral blade, a magnetic shield cover, a connecting steel column, a pressure-proof pipe, a closed nut and a flange disc. By arranging the internal and external magnets on a water flow spiral channel formed by the hollow pressure-proof pipe, the spiral blade and the pressure-proof pipe in an alternate arrangement mode, an efficient magnetizing environment of combining pulse cutting magnetizing and spiral turbulence is constructed, so that the water for dust fall flowing through is continuously and efficiently magnetized, the scale of turbulence and magnet pass of a water flow are increased, and the problem that water which is in contact with a magnetic field within a relatively short time is not uniformly magnetized is solved. The device has the characteristics of intrinsic safety, convenience in operation, small size and high magnetizing efficiency. The device is suitable for being placed in every position of the underground coal mine, and can effectively improve the wetting performance of the water for dust fall.

The invention discloses a serial hybrid permanent magnet variable flux motor, which comprises a stator (100), an armature winding (200) wound on the stator (100), and a rotor core (300). Each pole of (300) is provided with three permanent magnets that are not in direct contact and placed separately, wherein the second permanent magnet (302) is placed on the outside in a "one" shape, and the two first permanent magnets (301) are in a "V" shape. ” shape is placed on the inner side, the second permanent magnet (302) is a high coercive force permanent magnet or a low coercive force permanent magnet, and the first permanent magnet (301) is a high coercive force permanent magnet or a low coercive force permanent magnet force permanent magnet. In the motor of the present invention, the low coercive force permanent magnet and the high coercive force permanent magnet adopt special placement positions and methods, so that the motor is a magnetic circuit series structure, and the high coercive force permanent magnet acts on the low coercive force permanent magnet. The magnetization effect improves the working point and magnetization degree of the low-coercivity permanent magnet, improves the torque output capability, and reduces the magnetizing current of the motor.

The invention relates to a sludge magnetization dehydration treatment device, which belongs to the technical field of environmental geotechnical engineering. The magnetization dehydration treatment device is composed of a bracket, a magnetic force device, a telescopic heating charging device, a pipeline, a hopper, a chemical sprayer, a sensor, an outer circulation constant temperature water bath, a capillary water absorption time tester, and a sludge collector. The charging device and the variable distance magnetic device can realize the test of sludge dehydration performance with different magnetic field strength gradients; the external circulation constant temperature water bath can ensure that the sludge is heated evenly and the temperature control accuracy is high; the sensor, the chemical sprayer and the control system The connection can monitor data in real time and automatically regulate drug administration, which can improve work efficiency. The invention has reasonable design, simple structure and convenient manufacture, can determine the optimal combination parameters of sludge dehydration under the condition of multi-factor cooperative control, and has no secondary pollution in the sludge dehydration conditioning process, is easy to operate, consumes less energy, and has low cost.

The invention discloses a device for rapidly measuring grain size and magnetic domain wall width of oriented silicon steel sheet, which comprises a sample stage and a displaying part; the displaying part includes a display window and a contact layer, and the display window is transparent A glass plate or a transparent hard plastic plate, a liquid storage cavity for filling the visible suspension is formed between the display window and the contact layer; The suspension injection hole, and the closed air hole of the liquid storage chamber used to balance the pressure in the liquid storage chamber, the suspension injection hole and the closed air hole of the liquid storage chamber can be opened or closed as required; the sample table is provided with a magnetic The yoke is provided with a magnetizing winding, and when the magnetizing winding is energized, the oriented silicon steel sample placed on the sample stage can be magnetized. The device adopts the principle of powder grain method, which can quickly and accurately measure the grain size and magnetic domain wall width of grain-oriented silicon steel sheets.

The present invention provides a kind of extraterrestrial magnetic detector, which comprises a main body, a linear guide rail is arranged on the main body, a moving collet coil device and an outer star wheel workpiece bearing platform are both arranged on the linear guide rail, and a moving chuck coil device is arranged on the linear guide rail. Above the workpiece loading platform of the outer star wheel; there is a liquid collecting tank under the linear guide rail, and the lower part of the fixed chuck coil device with internal spray function is set in the liquid collecting tank, and the fixed chuck coil device and the moving chuck coil device are coaxially arranged ; There is an external spray head in the liquid collection tank, and the liquid collection tank is connected to the magnetic suspension tank; the side of the main body is equipped with an automatic loading and unloading mechanism. The device provided by the invention overcomes the deficiencies of the prior art, and enables the planetary wheels of various specifications to be magnetized sufficiently and evenly without changing tooling, and can conveniently realize automatic loading and unloading of workpieces, which is safe and reliable. The failure rate is low, and it can be inserted into the factory automatic assembly line.

The invention provides a production method of rotors of a claw pole permanent magnet and electromagnet mixed excitation generator and belongs to the technical field of automotive electrical machines and electric appliances. The production method comprises permanent magnet rotor production, electro-magnetic rotor production and rotor assembly. The claw pole of a permanent magnet rotor converts an axial magnetization type magnetic field into a radial magnetic field, magnetic performance is good, and magnetization is uniform. An electro-magnetic rotor is of a salient pole structure, the magnetic field generated by the electro-magnetic rotor faces an air gap directly, leakage flux is low, and the utilizing rate of the magnetic field is high. The magnetic field in the air gap of the generator is provided by permanent magnet steel and electro-magnetic coils together, adjustment of the magnetic field formed after the permanent magnetic field and the electromagnetic field are combined is achieved by adjusting the intensity and direction of currents of the electro-magnetic coils, the output voltage of the generator is stable, and the safety and using reliability of the automotive electric appliances are guaranteed.

The invention discloses a non-contact pipeline magnetic detection method and a damage detection technology for buried metal pipelines of petroleum and natural gas. The non-contact pipeline magnetic detection method of the present invention includes the following steps: step 1, preliminary analysis, determining the construction period; step 2, ground cleaning, marking the route; step 3, pipeline detection; step 4, analysis and processing of detection data; step 5 , Processing of data results. The non-contact pipeline magnetic detection method of the present invention overcomes various disadvantages of the existing contact detection method for local defects of pipelines. If blind excavation is required, the pipeline should be cleaned and degaussed, and finally the pipeline should be uniformly magnetized. ;Use the earth's magnetic field to uniformly magnetize the pipeline, without cleaning or other pretreatment on the surface of the workpiece to be inspected, the surface of the workpiece can be detected online, which greatly simplifies the detection process, making the speed, efficiency, and detection The depth is greatly deepened.