Main functions of high voltage connectors

The main function of the high voltage connector is to automatically connect the 25kV high voltage circuits on the roofs of the two locomotives when they are connected. The high voltage connector is mounted on the roof at the rear of each car, while docking with the hooks through the hook strength of the locomotive and trailer. When separated, it is automatically separated from the hook of the random car. The mechanical transmission mechanism of the high-voltage connector consists of a tension spring, a rubber bellows, a transverse axle support device, a stopper, a spherical stopper, a support cylinder, and a support insulator. The support insulator fixes the main body of the high-voltage connector to the roof and electrically insulates it from the roof. The support cylinder is mounted on the support insulator 1 and is positioned by a cylinder locating pin.

The tension spring is installed in the rubber bellows. When the connector head is not subjected to compression force, the connector is in a state of large expansion in preparation for docking; when docking, the two high-pressure connectors squeeze each other. When compressed to a certain amount, the half ring of the connector head and the fork connection mechanism tighten each other and the connection process is completed. When the distance between the two high-voltage connectors changes with the vehicle, the two high-voltage connector tension spring to ensure that the electrical connection mechanism of its head is always in a tight state, the conductive half-ring and the contact pressure between the fork remains unchanged, and thus has excellent electrical conductivity. The permissible movement distance of the high-voltage connectors is 160 mm. The cross-shaft support body comprises a cross-joint mounting and a cross-shaft support mounting. The cross-joint mounting consists of a cross-joint and a shaft sleeve. The cross joint 1 is fixedly connected to the shaft sleeve 2 by means of three countersunk head screws 3. The shaft sleeve is made of copper tubing and has a rectangular keyway. High pressure connector. The up and down swing control of the head of the high pressure connector is balanced by a leaf spring and a coil spring. The leaf spring is screwed to the swivel plate, and then the left and right crosshead bearing bodies are secured to the inside of the swivel plate with three screws to support the mounting of the crosshead connector. The coil springs are wound by spring steel bands which are placed over the ends of the crosshead mounting cross shafts and then mounted inside the left and right crosshead bearing bodies. At rest, the force of the leaf spring and the gravity of the head form a moment equal to the moment of the coil spring, thus keeping the conductive rod level. When the head oscillates up and down due to an external force, static equilibrium is restored due to the action of the coil spring and the leaf spring. Since the tension of the coil spring can be adjusted by the adjusting screw, it is easy to bring the conductive rod to a horizontal state when the high voltage connector is stationary. In addition, when docking locomotives with different tire wear conditions, the mounting height of the high-voltage connector can be adjusted in advance so that the front and rear high-voltage connectors are basically on the same level.

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