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Fault diagnosis of a case of unloading bridge

Ensure reliability. At the same time placed the control panel turned 90. Make contact with the direction of the contact with the trolley moves in the direction perpendicular to the plane of mutual reduce the contact of the jitter, to ensure reliable on-off circuit. c. Select starting torque M and the lower limit of switching torque M and configuration starting resistance for calculating the basis, and the removal of the principle of starting resistance control using the time to start the process to effectively prevent a large current surge d. Increase the softening resistance of the appropriate level to ensure that the motor speed change with load changes, the motor output power remained constant e. Increase in the control circuit relay 2KT and 3KT (see Figure 1). Reversing direction when the driver asked the direct operation of the most high-end conversion, by the 2KT and extension of cattle-l 3KT a 1XU ... 2. KA3K-A4, KA Blake KV - Fu-r \- _ _ 』』 Bucket. A l-M a _ 』【_/1K-M1 'U2KM: Second' JlJL,[link widoczny dla zalogowanych], fL_ [several sF. . j6KM Figure l caught 【. Schematic electrical control car, the motor stopped and then automatically transferred to the other direction of operation, thereby preventing the motor into reverse braking. Two-stage parking brake, the motor contactor control by the 5KM braking energy and self-motivation, the time delay after the relay 1KT control mechanical brake, so as to reduce the burden on the motor to ensure machine stability in the metal structure sex. f. Grab operations in order to ensure the synchronization of two motor 22 operation, the motor load distribution uniformity, we use the electric glazed synchronous way, the installation of two switches between the rotor circuit QK_. In lifting weights, will switch QK stage, two rotor resistance as a public resistance, the role played axis. The same model as the two motors, the load when they are equal, the same speed and slip, the rotor potential SE. No equal balance between the two rotor current, the motor rotor current to flow through public resistance. If one increases the load on the motor speed decreases, the slip increases, the result will be the rotor of the motor potential SE. Increases, so as to balance the current flowing through the other motor to ensure uniform load distribution of two motors,[link widoczny dla zalogowanych], relaying the same. I \I call ice MFI_j a ~ L a s plant - ~ Figure 2 Grab and enhance the motor swap the motor program g. The design of the electrical control circuit used to enhance the motor swap the motor and grab the program to prevent grab the motor due to overload and frequent damage in Figure 2. 1KMF and IKMR and 2KMF and 2KMR 1M and 2M were motors of reversing contactors, 4s to grab selector switch, s for the foot switch, 4K for the relay. When 4S 0 a l0-3 position, opening and closing motor IM as a fighting machine; when the switch 4s on 02, o-4 position, 2M as the opening and closing hopper motor, in order to achieve exchange of the two motors. . Ⅱ Coast port company under the proposed measures to bridge these two 5t overhaul unloading machine, and No. 2 Coal Unloader upgrading the original 37kw motor for back to 30kW. Put into operation more than two years, grab car drag Motor burned phenomenon. Enhance the motor burned phenomenon greatly reduced. Port of Vancouver to me purchasing a second container crane manufactured by the Shanghai Factory exports to Canada since the first alfalfa Panamax container cranes shore, was the end of 1992 machine with a fork on board ship to Vancouver, in A formal vote in early February of this year operation. This sets the shore container crane spreader download membership charge 50t,[link widoczny dla zalogowanych], outreach of 44m, lifting height of 33m, is currently one of the world's largest crane is equipped with the most advanced American GE company's digital SCR adjust the system's multi-functional Germany Rexroth hydraulic systems, and manufacture our own range of high-tech mechanical and electrical fittings. Operating normally after the operation, the user is satisfied,[link widoczny dla zalogowanych], praised it as \Canada, North America, containing the west coast of Vancouver port is one of the largest deepwater port in order to develop container transport, the port of Imperial has decided to purchase one I have the same type of crane. The contract signing ceremony at the February 18 Factory, held in Shanghai. Since the intention of purchasing the equipment as early as last 1o months already reached well prepared in advance at first glance, the machine will be delivered in October this year, the Port of Vancouver. In view of Shanghai's container depot business has been placed under local group of Shanghai Zhenhua Port Machinery Co., Ltd. Management (Shanghai Factory of China and Hong Kong jointly organized soil specializing in container machinery manufacturing foreign-funded enterprises), the equipment purchase contract implementation will be conducted mainly in Shanghai Zhenhua. (Zheng Huihua) 23
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