|
The Sea Pole (Hai Ji, or 海极) class bathyscaphe is a class of bathyscaphe of the People's Republic of China (PRC). They are capable of diving up to 7,000 meters, covering 99.8% of the oceanic floor of the world. Two units of this class are planned, with derivatives to follow and are used by both the civilian and military establishments in China. ==Design== Sea Pole class bathyscaphe is designed by the (702nd Research Institute ) of China Shipbuilding Industry Corporation. The general designer is Mr. Xu Huangnan (徐芑南), a professor of (School of Naval Architecture, Ocean and Civil Engineering )(船舶与海洋工程学院) of Shanghai Jiao Tong University (SHJTU), who also designed many other Chinese submersibles and unmanned underwater vehicles. The first deputy general designer is Mr. Cui Weicheng (崔维成), and the deputy general designer was Mr. Zhu Weiqing (朱维庆), all of the three are academicians of the Chinese Academy of Sciences. There are two mechanical arms with associated tools that enable the bathyscaphe to perform a various tasks at its maximum operational depth, and this pair of mechanical arms with 7 degrees of freedom (7-DOF) are mounted on the right and left sides of the vehicle, which is powered by 110 kWh (110 V, 800 Ah) silver oxide – zinc batteries. The Sea Pole bathyscaphe is equipped with various communication systems, but the data transfer rate remains a bottleneck, with the transmission rate only being 80 kbit/s, compared to 100 Mbit/s in the usual internet transmissions. As a result, the transmission of an ordinary color image from the bathyscaphe to the mothership takes approximately half a minute. The pressure hull is built of titanium alloy, and the manufacturing method for the pressure hull involves producing two hemispherical parts by tungsten inert gas welding (TIGW) six-side plates to a top plate, followed by heat treatments and polishing by machining; the two halves are then joined by TIGW to form a complete sphere. The plate thickness is 76 – 78 mm, with deviations of ±4 mm in the completed radius, and sphericity is 0.4% or less. Pressure testing of the pressure hull was performed in Russia, and included a one-hour test at a water pressure equivalent to 7,700 meters, or a 10% greater depth than the vessel's, 7,000 m maximum operational depth, a continuous hour-long test at water pressure equivalent to 7,000 m, and a test simulating 0 to 7,000 m ascent/descent of the submersible, which was repeated six times. There were no problems reported in any of these tests, and the pressure hull passed with flying colors. All viewports of Sea Pole class bathyscaphe have a circular truncated cone shape. There is a large viewport with diameter of 20 cm mounted in the bow, and this central view port is the same type of that of Russian Mir class bathyscaphe. The two additional smaller side viewports of 12 cm diameter are mounted on portside and starboard side, closer to the front than other bathyscaphes. The advantage of this arrangement is that it enables navigation while both the pilot and the scientists simultaneously observe an objective in front of the vehicle. However, the side views have limited field of vision. There are two onboard life supporting system based on that of Shenzhou 6 spacecraft, and additionally, there are two onboard oxygen generating systems independent of life supporting system for additional safety. The pressure hull is built of titanium. Sea Pole class bathyscaphe has a teardrop shape tapering toward the stern and four tail fins which form an X shape. The main thruster system is based on the same design principle as that of the Russian Mir class bathyscaphe. Four main thrusters inclined in a narrowing shape are mounted in the spaces between the four fins. One horizontal thruster is mounted on the top of the bow, and thrusters for vertical / horizontal turning and auxiliary propulsion are provided on the two sides of the hull. Parallel movement in the horizontal direction is achieved by using a combination of the horizontal thruster on the bow and the right and left stern thrusters, while vertical movement uses a combination of the bow side thrusters and the top and bottom stern thrusters. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sea Pole-class bathyscaphe」の詳細全文を読む スポンサード リンク
|