Part 1: Long Stroke Solenoid Working Principle
The long-stroke solenoid is mainly composed of a coil, a moving iron core, a static iron core, a power controller, etc. Its working principle is as follows
1.1 Generate suction based on electromagnetic induction: When the coil is energized, the current passes through the coil wound on the iron core. According to Ampere's law and Faraday's law of electromagnetic induction, a strong magnetic field will be generated inside and around the coil.
1.2 The moving iron core and the static iron core are attracted: Under the action of the magnetic field, the iron core is magnetized, and the moving iron core and the static iron core become two magnets with opposite polarities, generating electromagnetic suction. When the electromagnetic suction force is greater than the reaction force or other resistance of the spring, the moving iron core begins to move toward the static iron core.
1.3 To achieve linear reciprocating motion: The long-stroke solenoid uses the leakage flux principle of the spiral tube to enable the moving iron core and the static iron core to be attracted over a long distance, driving the traction rod or push rod and other components to achieve linear reciprocating motion, thereby pushing or pulling the external load.
1.4 Control method and energy-saving principle: The power supply plus electric control conversion method is adopted, and the high-power start-up is used to enable the solenoid to quickly generate sufficient suction force. After the moving iron core is attracted, it is switched to low power to maintain, which not only ensures the normal operation of the solenoid, but also reduces energy consumption and improves work efficiency.
Part 2 : The main characteristics of the long-stroke solenoid are as follows:
2.1: Long stroke: This is a significant feature. Compared with ordinary DC solenoids, it can provide a longer working stroke and can meet the operation scenarios with higher distance requirements. For example, in some automated production equipment, it is very suitable when objects need to be pushed or pulled for a long distance.
2.2: Strong force: It has sufficient thrust and pulling force, and can drive heavier objects to move linearly, so it can be widely used in the drive system of mechanical devices.
2.3: Fast response speed: It can start in a short time, make the iron core move, quickly convert electrical energy into mechanical energy, and effectively improve the working efficiency of the equipment.
2.4: Adjustability: The thrust, pull and travel speed can be adjusted by changing the current, number of coil turns and other parameters to adapt to different working requirements.
2.5: Simple and compact structure: The overall structural design is relatively reasonable, occupies a small space, and is easy to install inside various equipment and instruments, which is conducive to the miniaturization design of the equipment.
Part 3 : The differences between long-stroke solenoids and comment solenoids :
3.1: Stroke
Long-stroke push-pull solenoids have a longer working stroke and can push or pull objects over a long distance. They are usually used in occasions with high distance requirements.
3.2 Ordinary solenoids have a shorter stroke and are mainly used to produce adsorption within a smaller distance range.
3.3 Functional use
Long-stroke push-pull solenoids focus on realizing the linear push-pull action of objects, such as being used to push materials in automation equipment.
Ordinary solenoids are mainly used to adsorb ferromagnetic materials, such as common solenoidic cranes that use solenoids to absorb steel, or for adsorption and locking of door locks.
3.4: Strength characteristics
The thrust and pull of long-stroke push-pull solenoids are relatively more concerned. They are designed to effectively drive objects in a longer stroke.
Ordinary solenoids mainly consider the adsorption force, and the magnitude of the adsorption force depends on factors such as the magnetic field strength.
Part 4 : The working efficiency of long-stroke solenoids is affected by the following factors:
4.1 : Power supply factors
Voltage stability: Stable and appropriate voltage can ensure the normal operation of the solenoid. Excessive voltage fluctuations can easily make the working state unstable and affect efficiency.
4.2 Current size: The current size is directly related to the strength of the magnetic field generated by the solenoid, which in turn affects its thrust, pull and movement speed. The appropriate current helps to improve efficiency.
4.3 : Coil related
Coil turns: Different turns will change the magnetic field strength. A reasonable number of turns can optimize the performance of the solenoid and make it more efficient in long-stroke work. Coil material: High-quality conductive materials can reduce resistance, reduce power loss, and help improve work efficiency.
4.4: Core situation
Core material: Selecting a core material with good magnetic conductivity can enhance the magnetic field and improve the working effect of the solenoid.
Core shape and size: The appropriate shape and size help to evenly distribute the magnetic field and improve efficiency.
4.5: Working environment
- Temperature: Too high or too low temperature may affect the coil resistance, core magnetic conductivity, etc., and thus change the efficiency.
- Humidity: High humidity may cause problems such as short circuits, affect the normal operation of the solenoid, and reduce efficiency.
4.6 : Load conditions
- Load weight: Too heavy a load will slow down the solenoid's movement, increase energy consumption, and reduce work efficiency; only a suitable load can ensure efficient operation.
- Load movement resistance: If the movement resistance is large, the solenoid needs to consume more energy to overcome it, which will also affect efficiency.