Power system: around the chimney of destroyer 170, you can see the large air filter window unique to gas turbine warships. The main engine is DA/DN80, 1995 made in Ukraine. This is the most advanced mainframe of its kind in the world except WR-2 1 of the United States, but its service life and maintenance time remain to be seen. The main engine of DA/DN80 is 4.6m long, weighs16t, rotates at 3000-3600rpm, and the maximum power can reach 26680.5kW, with a thermal efficiency of 36.5%. Its performance is quite advanced. But China MTU20V956TB90 is still the main auxiliary engine.
Stealth: In 2 1 century, navies all over the world began to pursue stealth requirements in warship design. Because of the previous design experience of 167, the China navy adopted a further improved method on 170, changed the semi-closed design method of 167 in appearance, and adopted a fully closed shape design for the first time. A curved panel is used instead of a flat panel, the inclination angle of the side wall is larger, and a round surface and edges are used at the corners to avoid strong specular reflection. And all kinds of exposed weapons and equipment are also secretly modified as much as possible; For example, the main gun adopts stealth design, the anti-ship missile is equipped with a double-sided baffle, and the air defense missile adopts a vertical launcher, so that the whole mechanism is buried deep inside the hull. For surface ships, infrared radiation has obvious detectable characteristics. Its infrared radiation sources are mainly chimneys, main engine room and its exhaust gas and hot water, lights, thermal radiation on the hull surface, etc. On 170, aiming at the chimney with strong infrared characteristics, many methods were adopted to suppress infrared radiation, such as cold water cooling, heat insulation baffle, coating heat insulation layer, heat insulation pad, and exhaust gas generated by diesel engine being discharged into water through internal pipelines. In the aspect of acoustic stealth, the hull surface of 170 adopts anechoic tile, anechoic coating and efficient five-blade paddle to prevent underwater sonar detection. The combination of the above protective measures makes the stealth ability of 170 outstanding. It is said that the signal on the display screen of the 170 radar with a full displacement of more than 7,000 tons is only equivalent to the size of a ship of several hundred tons.
Weapons and equipment: the 12 anti-torpedo depth charge at the bow, and the FQF-2500/ 12 anti-submarine/anti-torpedo depth charge launcher which was originally considered to have been eliminated appeared on 170. The depth bomb has a range of about 2500 meters and is mainly used for close-range anti-submarine. At present, China Navy still has a large number of ships equipped with this old but practical equipment. However, it is a bit impossible to deal with those high-performance submarines with deep bombs with a range of 2500 meters; Therefore, in terms of use, the author thinks it is more likely to be used to counter incoming torpedoes, which is by no means nonsense, because Russian naval vessels are generally equipped with similar anti-torpedo facilities. Except for the number of bombs, everything is almost the same, such as the overall structure, launcher and system ammunition. Although this system has a simple structure and no guidance and electronic jamming equipment, compared with other commonly used anti-torpedo equipment, it is a drop in the bucket, but it is powerful, fast to launch and dense in firepower, and can form a tight underwater barrier during volley. As long as we cooperate with reliable testing equipment, we can still achieve certain results.
Naval gun: Single-tube 100mm compact naval gun developed by Creusot Loire Company of France, installed at the rear of 12 anti-torpedo deep-water bomb launcher, which is mainly used for attacking maritime targets and air defense, as well as anti-missile and carrying out offshore bombing missions. The shell adopts stealth design, with an initial velocity of 870 m/s, a barrel length of 5500 mm and a firing rate of 10 ~ 90 rounds/min. For maritime targets, the maximum range is17500m and the effective range is12000m; for air targets, the maximum range is 8000m and the effective range is 6000m; The gun weighs 17000 kg and has the advantages of compact structure, light weight, high firing rate and short reaction time. At a distance of 20000 meters, the probability of a single shot hitting the target can reach 0.7 ~ 0.8. This kind of gun is probably made in China after importing French patent. As early as the mid-1980s, China purchased two sets of this device from France, of which 1 set was randomly used on the anti-submarine enhanced Jianghu class frigate 544. According to the application effect, China Navy was very satisfied with the performance of the gun, and then signed an import production line with France, which provided technical support to further improve the gun to equip newly designed large surface ships. Because 170 will be mainly used to patrol the South China Sea in China in the future, it can still complete the combat mission well with the advantages of fast firing rate, high hit accuracy and great power in the face of the weakness of the navies of Southeast Asian countries. After all, sometimes shells are more useful than missiles.
Anti-aircraft missile: As a first-class destroyer with air defense as its main function, 170 is equipped with the first long-range ship-borne anti-aircraft missile in China, the model of which is "HHQ-9", which was developed from land-based HQ-9A. The missile is wingless, with a minimum operational altitude of 0.5 km, a maximum operational altitude of 30 km, a minimum operational distance of 6 km, a maximum operational distance of 120 km and a maximum flight speed of over Mach 4.2. The missile has a total length of 6.8m, a diameter of 0.47m, a missile weight of1300kg and a warhead weight of over180kg. The missiles were launched in vertical cold launch mode, divided into six packages, with a total of 48 HHQ-9A missiles. The launcher is similar to the revolver used by the Russian navy, but the launching system of SA-N-6 uses one launcher for eight missiles, while China's Haihong -9 uses a separate launcher for each missile. Comparatively speaking, the launch mode of Haihong -9 is more reliable, the launch speed is faster and the safety rate is higher. However, because the minimum shooting height of the missile is only 500 meters, it is obviously unable to meet the requirements of fleet air defense, so the close cooperation of other ships is needed when performing formation air defense.