英文翻译答案.docVIP

英文原文 1. General description of the SIEMAG disc brake unit This brake unit is the electro-hydraulic control system of a gearless disc brake for winders. The brake unit operates on the exhaust principle, i.e. the braking force is generated by sets of disc springs and released by hydraulic pressure. The braking force generators with the brake shoes directly act axially on the brake disc. The braking force is generated by sets of disc springs and transmitted onto the brake shoes. The number of brake elements determines the respective braking force required. As soon as the brakes are being released, the brake shoes are lifted form the brake disc with the aid of pressure oil. During the braking, the oil flows back into the tank and the brake shoes are being pressed against the brake disc. The braking force generators type BSFG 408 are s series product supplied by the Swedish firm ASEA-Hagglunds. They have a maximum press-down force of　2X7906 kN. For reasons of better system availability, the hydraulic pressure is generated by two regulating pumps that are each driven by an electric motor. Both pumps are started when the system is being switched on. Any failure of a pump will be signaled. The oil filtration is undertaken by a pressure filter?6.2?provided in front of the braking force generators. Furthermore, two gear pumps that are directly coupled with the regulating pumps, maintain a permanent oil cooling and filtering circuit during system operation (filter?6.1?and cooler?14?). Both filters have an electrical contamination control. The mesh size of the filters is specified by the supplier to be 10μm (see TAS No.3.9.6.4). The equipment includes a controlled electrical tank heating. The fluid level in the tank is monitored as well. The service braking is done with the aid of two electrically controlled proportional pressure relief valves‘43.1’and‘43.2’that are hydraulically connected in series. The safety braking is done with the aid of position-controlled 4/2-way elec