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| lcs不是全电推进的，不能这么灌迷魂汤 |
| 送交者: 古宇庙 2013月10月12日02:01:40 于 [世界军事论坛] |
| 回 答:陈虎点兵：从福特号航母看中国军工现代化建设任重道远 zt 由 eastwest 于2013-10-11 05:02:21 |
主推进仍然是燃气轮机。另外有专门柴油机用于发电。部分电力用来侧推以改善lcs的转弯能力。 Propulsion plants USS Independence has nine engines: two General Electric LM 2500 gas turbines, two MTU 8000 diesel engines, four electrical generators, and one dedicated diesel engine about the size of an electric generator to power the hydraulic pump for the retractable Azi thruster.Located towards the bow of the ship, the Azi thruster is similar to a 600-kilowatt outboard motor that is able to drop below the ship’s keel and rotate 360 degrees, explained Miller. It acts like a steerable bow thruster and provides sailors with precision maneuvering capabilities. It also can function as a survivable, take-home power method. “If you lost all four primary shaft lines, you could operate the ship at about 5 knots on the thruster and be able get out of harm’s way,” he said. The engines power four water jets in the stern of the main hull — two Wartsila 160 gas turbine water jets, and two Wartsila 150 diesel water jets. Each is steerable and together they offer a great deal of maneuverability, even in primary propulsion, Miller said. They are all reversible to stop the ship quickly, he added. Sailors who have driven the ship say that she handles like a jet ski. Independence’s hull design is fuel efficient, and the ship can travel 4,500 nautical miles — the distance from Norfolk, Va. to Lisbon, Portugal — on a single tank, depending on the speed, said Miller. USS Freedom has eight engines: two gas turbines, two diesel engines and four diesel generators. She may not have a bow thruster, said Lemmo, but she boasts a large machinery space to house the two Rolls-Royce MT30 gas turbine engines — the largest marine gas turbines in any navy. Producing 36 megawatts each, they are the most powerful gas turbines ever installed on a Navy ship. Along with the two Fairbanks Morse diesel engines, the combined diesel and gas turbine system provides sailors options for cruising efficiently at low speeds and for sprinting at high speeds. Freedom’s range is greater than 3,500 nautical miles at cruise speed. “At low speed, less than 18 knots, you want to run on diesel engines because they’re economical. They don’t waste a lot of fuel,” explained Lemmo. “Ninety percent of the operation of the ship is going to be at lower speeds. You run on diesels. When we want to go fast is when we kick in the gas turbines. And when we run all four engines together in that combined mode, we can do well over 40 knots.” The four 750-kilowatt Fincantieri Isotta Fraschini diesel generators run a three-megawatt electrical power plant. All that engine power drives four Rolls-Royce Kamewa water jets. The two outerboard water jets are fixed in pla |
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