The electrical control system of the bridge crane is an electrical control product. Generally used under special working conditions, most of the installation positions vibrate greatly. During the operation of the bridge crane, not only the rotating parts rotate, but the track is not smooth, but the joints will also vibrate, as well as emergency stop, reversing, lifting, multi-mechanism linkage and other actions. This can shake the bridge. The electrical control products of the bridge crane shall meet the following requirements: the incoming line voltage fluctuation shall not exceed 10% of the rated voltage, the electrical components shall be installed vertically, the inclination angle shall not exceed 5 degrees, the original installation shall be firm, and there shall be no horizontal or vertical movement relative to the main engine during the working process. beat.
With the development of frequency conversion speed regulation technology for bridge cranes, bridge crane frequency converters can efficiently and stably drive almost all motors, including zdy motors, YZR motors, etc. It can be seen that the choice of variable speed bridge cranes is not to spend money, but to drive almost all motors, including zdy motors, YZR motors, etc. In order to reduce the cost of bridge cranes. For example, professional gearbox cranes can be maintained without maintenance for three to five years. As we all know, traditional cranes cannot be achieved.
In view of the special circumstances of the bridge crane and its high safety, the electronic control system of the bridge crane must not only meet the general technical requirements specified by the electronic control product standard, but also meet some special requirements. The transmission control scheme of the bridge crane should have at least one level of short circuit protection, loss of voltage protection, emergency stop switch or device, and necessary limit protection. The electrical components should be able to withstand the vibration of the installation position of the lifting electronic control product. The selection should be made according to actual environmental conditions or other special electrical appliances, and necessary auxiliary protective measures should be taken.
The bridge crane is driven by frequency, that is, variable speed operation. General bridge crane equipment requires frequent replacement of the transmission mechanism. In the later stage of the vehicle driving, almost all failures are caused by the driving of the vehicle. For example, due to engine combustion, damage to the deceleration device, abrasion of the beams, electrical failure, etc., the start and stop inertia shocks are caused. In fact, many users believe that there is no need to change the crane speed. Now, I tell you, if the lifting valve or other equipment of the hydraulic station does not use a variable speed crane, then every few months, it is not needed.
According to the relevant installation procedures, all electrical components, accessories and wires must be firmly installed. After the bridge crane is vibrated, there must be no loosening, twisting, shifting, falling, etc., which will affect the normal operation of electrical components and control equipment. The main circuit and control circuit should be connected to the panel as much as possible. Try to use insulated or terminal insulated cable terminals. For outer conductors that need to be welded with multiple parts, measures should be taken to ensure that no welding accident occurs when the bridge crane is working.
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