Alnico is an alloy of Aluminium, Nickel and Cobalt.It also contains Iron , Copper ,Titanium, Different metal
component constitution will form different magnet properties, application will also change accordingly.
Alnico is produced by sintered or casted technique,Its`surfaces may need machining,or to be ground for a smoother surface finish and looks brightly metallic looking. Casting means can producing AlNiCo forvariety sizes and shapes, Sintered Alnico is subsize and have very tiny tolorance but machanical performance is not good.
The most commonly used Alnico is Alnico5. There are 4 sort of cast Alnico5 plus a singlesort of sintered Alnico5 (sintered Alnico and cast Alnico have slightly different magnetic and mechanical performance). Among the permanent magnetic materials, AlNiCo have the best reversible temperature coefficient, the highest working temperature up to 500 ℃,it has the
hardest and toughest strongness.Most ALNICO Magnet grades are anisotropic (axial / vertical direction add magnetization).The others are isotropic(horizontal direction magnetized and usually have many poles on one magnet) they are weaker on magnetism but offer more options on design and properties.
ALNICO Magnet ALNICO Magnet,Cast ALNICO Magnet,ALNICO 8 Magnet,ALNICO 5 Magnet NINGBO SHINE MAGENETIC TECHNOLOGY CO.,LTD , https://www.shinemagnets.com
Heavy hammer butterfly valve working principle
When the weight-holding butterfly valve is opened, the solenoid valve is reversed and the oil pump is started. The hydraulic oil flows through the flow control valve and the high-pressure hose into the oil cylinder to push the piston and drive the lever connected with it to lift the heavy hammer to open the valve. After the valve is opened, the system will automatically start pressing; the motor will continue to charge the accumulator. After the pressure reaches the high pressure set point, the pump stops. Turn the flow control valve handwheel can adjust the valve opening time, adjust the range of 10 to 90 seconds. System leakage, pressure drop to low pressure set point, the pump motor starts automatically, reaching high pressure set value after the shutdown. When the weight valve is closed, the solenoid valve is reversed and the pressure oil in the cylinder goes through the fast and slow valve, high-pressure hose and electromagnetic valve back to the fuel tank, the hammer falls, the connecting rod drives the butterfly valve to rotate and close quickly, Most of the water flow is about 70% of the previous trip; the last 30% of the trip is closed slowly. Off angle and the various stages of buffer time can be adjusted according to the actual conditions of the pipeline to effectively eliminate the water hammer pipe; adjust the time to fast off 2 seconds to 25 seconds, slow off 6 seconds to 90 seconds. During opening and closing, the valve can be stopped at any intermediate position by the stop button. Stop action is mainly used for system debugging. Manual pump is mainly used for system debugging. In the absence of electricity or the pump can not work properly, shaking the hand pump, but also to complete the valve opening and the system of packing. Open the normally closed shut-off valve, under the action of the weight potential and the hydraulic torque, the connecting rod drives the butterfly valve to rotate and close the valve. This article Keywords: butterfly valve