Highly reliable DC contactor and contact assembly processing method applied thereto
A DC contactor and contactor technology, applied in relays, electrical components, electromagnetic relays, etc., can solve the problems of product life impact, poor waterproof and moisture-proof effect, and easy damage to the contactor's constant moving structure, achieving long service life, It is not easy to be damaged by moisture and oxidation, and it is not easy to be damaged by high temperature
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Embodiment 1
[0036] Highly reliable DC contactor, refer to figure 1 and Figure 5 , including a housing 1 , a contactor main body 2 arranged in the housing 1 , a coil 20 used as a starting power generator, and an energy-saving circuit board 4 . Among them, the energy-saving circuit board 4 is set to reduce the holding power waste of the contactor electromagnetic system. It is a circuit board integrated with an energy-saving circuit.
[0037] The casing 1 is made of plastic, and includes a square box body 11 and a cover plate 12 covering the opening of the inner cavity of the box body 11 . The housing 1 is filled with an inert gas as a protective gas, so that the contactor main body 2 and the energy-saving circuit board 4 can be protected, the oxidation probability of the two is reduced, the two are less likely to be damaged, and the service life of the product is extended.
[0038] refer to figure 1 and figure 2, in order to optimize the sealing of the product and improve the waterpro...
Embodiment 2
[0074] refer to Figure 7 , the difference from Embodiment 1 is that: a micro switch 7 is fixed on the outer wall of the arc chute 28; , or in other words, the arc chute 28 is provided with a passage for the paddle 231 to slide up and down; the paddle 231 is made of an insulating material, such as ceramics. The trigger end of the micro switch 7 is located above the plectrum 231 and on its moving line.
[0075] When the moving contact 22 abuts against the stationary contact 21 , the plectrum 231 touches the micro switch 7 . The wires of the microswitch 7 extend outside through the sealing plate 13 and the cover plate 12, and the staff can connect it to the load and power supply, and then observe the response of the load to judge the position of the moving contact 22, or use it as an input signal generator . The setting of the micro switch 7 enables the present invention to be detected by the staff in time when the contact fails, and it is convenient for the staff to judge th...
Embodiment 3
[0077] A contact assembly processing method applied to a highly reliable DC contactor, including:
[0078] Step 1, select a conductive material to make a suitable static contact 21 and moving contact 22, for example, select a nickel-based copper alloy;
[0079] Step 2: Select one of the opposing surfaces of the static contact 21 and the moving contact 22 to be coated with a copper coating, and then coat the copper coating with diffused oxygen-free copper to form a heat-resistant conductive layer 212; while the other is selected during processing Made of dispersed oxygen-free copper. In the present invention, the preferred moving contact 22 is to choose dispersed oxygen-free copper, because the moving contact 22 is generally in the shape of a long plate. It is easy to deform under high heat, so it needs better high heat resistance than the static contact 21 .
[0080] The reason why the copper coating needs to be coated first is to enhance the fixing effect between the heat-r...
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