China began to apply and popularize low-speed water jet propulsion technology from 1956, and 1972 entered the research and development stage of high-speed water jet propulsion technology. In order to meet the needs of shallow river and border patrol, 708 Research Institute researched and designed a high-speed water jet propulsion patrol boat (code 982). The boat was built in1974+February and tested item by item in strict accordance with the trial outline. At the end of the same month, the sea trial was successful at one time, with a maximum speed of 56 km/h, which exceeded the original design requirement of 45 km/h. In order to reduce the weight of the boat and facilitate the maintenance of the hull by the border guards, the hull and superstructure were made of glass fiber reinforced plastic materials, which was the first time to build a high-speed speedboat with medium horsepower in China at that time. Strict strength calculation and process design were made in the design, and various sampling tests were made in the construction, which accumulated experience for China FRP shipbuilding. Jet pump is the most critical component of high-speed water jet propulsion ship. In order to design and develop high-quality jet pumps, scientists and technicians creatively applied the design method of propeller cycle theory to the design of pumps, and put forward a variable cycle design method that is more in line with the load distribution of pumps. At the same time, the relationship between the main parameters of the pump, such as flow Q, lift H and circulation γ distribution, is derived for the first time. The parameters of pump impeller are analyzed and demonstrated respectively. In addition, it breaks through the design method of not checking the cavitation performance of the impeller when designing the pump in the water pump industry, and applies the cavitation checking method of the propeller to check the blade section to ensure the good cavitation resistance of the pump. 1In July, 1975, the boat made an extended trial on the Songhua River in Harbin for10.5 months, which included shallow water sailing, rushing through rapids, sharp bend and narrow channel, rushing back to the beach, emergency reversing, avoiding floating objects, sailing in aquatic plants, sucking stones in pebbles, running pumps in muddy water, radio communication, long-distance sailing test with full load, etc. Many tests have confirmed the characteristics of the boat, such as shallow draft, fast speed and adapting to the needs of border defense. In order to improve the performance of the boat, new design modifications are put forward: canceling the clutch and replacing it with a ball valve; Single-board rudder is changed to three-blade rudder, equipped with butterfly bucket, and the bucket is changed from manual operation to hydraulic operation; Bar grille and mesh grille are installed according to different channel conditions. The modified boat is called 982B boat, and nearly 200 boats will be produced according to this drawing. The development of high horsepower (1200 HP) axial flow pump with water jet propulsion began at 1978. This research is difficult, because the high speed of the main engine leads to the high specific speed of the pump and the high specific speed of cavitation, and the technical indicators required by the pump are close to the advanced level abroad. The actual pump test of high horsepower pump was carried out for the first time in China. The flow rate Q of the pump reaches more than 7200 tons/hour, and 7 1 1 undertakes this test. 1May, 1980, 1200 HP water jet propulsion axial pump appraisal meeting was held in Shanghai. The appraisal meeting holds that 1200 HP water jet pump exceeds the domestic advanced level and is close to the international level. The successful development of 1200 HP water jet propulsion axial pump has laid a good technical foundation for the design of high-speed water jet propulsion patrol boat (982). From 65438 to 0985,708, 982 boats were successfully designed and developed, which exceeded the international level of similar products and provided advanced equipment for the troops. Since then, 708 Institute has designed a small 70 HP high-speed water jet propulsion planing boat, which integrates the latest research results of water jet propulsion technology and was built in 1984. The boat has a series of new functions, which are used for patrol, traffic, hydrological measurement and so on. , widely welcomed by the military and civilian circles. The transformation of high-speed water jet propulsion technology from military to civilian shows the vitality of water jet propulsion technology.
Type 982, there are many! 982EK water jet patrol boat?
Main scale l× b× h (m):11.50× 3.15×1.05?
Passenger: 7?
Equipped with power (HP): 450?
Speed (km/h): 57?
Navigation area: class B.