Energy storage: As the name suggests, it refers to the storage of energy, and that power source is the power source for storing energy. Where is the energy reserve located? Used for closing vacuum switches The vacuum switch must be closed by lengthening the spring to store energy, which refers to the circuit breaker of the spring energy storage mechanism. There are two types of energy storage: motor energy storage and manual energy storage. The black rotating power supply is the power source that controls the opening and closing of the energy storage motor. When the power is turned on to the energy storage location, it automatically stores energy.
Energy storage should refer to the automatic energy storage of SF6 circuit breakers after each operation. Sulfur hexafluoride (SF6) is a colorless, odorless, odorless, and toxic non self igniting gas under normal conditions, with a molecular weight of 146.06 and a density of 6.139g/l, about 5 times that of air. It is one of the substances with the worst unknown chemical stability, and its inertness is similar to that of nitrogen. It has excellent thermal stability and does not decompose in its pure state even above 500 ℃. Sulfur hexafluoride has excellent electrical insulation and arc extinguishing properties. Under the same conditions, its insulation ability is more than 2.5 times that of air and nitrogen, and its arc extinguishing ability is 100 times that of air. The melting point of sulfur hexafluoride is -50.8 ℃, which can be used as a similar refrigerant in the temperature range of -45 to 0 ℃. Due to its good heat resistance, it is a stable high-temperature heat carrier. Sulfur hexafluoride has been widely used in recent years in the power, electronics, electrical industries, as well as in laser, medical, meteorological, heater, fire protection, chemical, military, aerospace, non-ferrous metallurgy, physics research, etc. due to its excellent properties mentioned above and others.
Energy storage spot welding machine, also known as capacitive energy storage spot welding machine, energy storage machine, etc., uses AC power rectified by a rectifier to charge a capacitor. The stored electrical energy is then discharged by a welding transformer and converted into a low voltage, concentrated and stable pulse current. Through the contact points of the welded workpiece, resistance heat is generated to melt the metal.
The advantages of energy storage welding machines have been discussed extensively, mainly as follows:
1. Energy saving, compared to ordinary single-phase AC spot welding machines and secondary rectification type spot welding machines;
2. The low demand for the power grid is not only reflected in the fact that high-power welding machines only require low-power power grids, but also in the fact that fluctuations in the power grid have little impact on them;
3. The thermal impact of solder joints is small, and they do not change color or deform, which is too important for some appearance parts;
4. Strong standard welding is extremely suitable for convex welding, including multi-point convex welding, ring convex welding (sealing requirements), and welding high-strength steel is no problem.
Working principle of energy storage spot welding machine:
The inter electrode resistance includes the workpiece's own resistance Rw, the direct contact resistance Rc between the two workpieces of the welding machine, and the direct contact resistance Rew between the electrode and the workpiece, i.e. R=2Rw Rc 2Rew. When the workpiece and electrode are constant, the resistance of the workpiece depends on its resistivity. Therefore, resistivity is an important function of the welded material. Metals with high resistivity have poor conductivity (such as stainless steel), while metals with low resistivity have good conductivity (such as aluminum alloy). Therefore, when spot welding stainless steel with a touch welding machine, heat generation is easy but heat dissipation is difficult, and when spot welding aluminum alloy, heat generation is difficult but heat dissipation is easy. When spot welding, the former can use a smaller current (several thousand amperes), while the latter must use a larger current (tens of thousands of amperes). The resistivity not only depends on the type of metal, but also on the heat treatment form, processing method, and temperature of the metal.
1. The current is high. The instantaneous current of energy storage welding machines is very high, suitable for high current projection welding industry. Energy storage welding machines have been well applied in China because they have unparalleled advantages compared to other welding machines. Therefore, the welding process that can be completed is unique.
2. The discharge time is short and the thermal impact is minimal. The discharge capacity of an energy storage welding machine is its entire energy storage, and the time and resistance of the secondary circuit are closely related. The discharge time is short, which can ensure that the deformation degree of the welding point is small and the precision of the welded workpiece is guaranteed.
3. Time can be controlled by oneself. The energy storage welding machine adopts self energy welding method, and the equipment can set corresponding time and parameters according to the different welding materials to ensure good welding effect.
Capacitive energy storage spot welding machine uses capacitors to store energy. When the energy can melt a small area of solder joint, the capacitor discharges instantly. Compared with other welding methods such as AC machines, the instantaneous power drawn from the power grid is low, the load balance of each phase is high, the power factor is high, and concentrated energy can be provided to the welding area. It can obtain welded parts with good surface quality and small deformation, and can weld some difficult to weld non-ferrous metals with good thermal conductivity and conductivity. Suitable for welding aluminum, copper silver, nickel metal and alloy materials.
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