Chinese marine crankshafts are localized and enter the Korean market
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If the diesel engine is likened to the "heart" of the power of a large ship, the crankshaft is the "big artery" that transmits power to large ships. The "large arteries" of large ships in China used to rely entirely on imports, which were not only expensive, but often "one axis is hard to find." Today, the "big artery" of Chinese ships has not only achieved localized production, but also entered the Korean market.
In 2002, Shanghai Marine Crankshaft Co., Ltd. began to develop marine crankshafts independently; in 2005, there was good news here: it achieved zero breakthrough in the production of marine crankshafts in China. Since the mid-1990s, China's shipbuilding industry has developed into an export-oriented industry, which has always occupied the third place in the world. However, the semi-combined crankshaft of large-scale marine diesel engines has always relied on imports. At that time, only a few countries such as Japan, South Korea, the Czech Republic, Spain, and Poland had the ability to manufacture crankshafts, and the international marine crankshaft market was highly monopolized. Liu Chaoming, general manager of Shanghai Marine Crankshaft Co., Ltd. said that China had previously wanted to introduce crankshaft manufacturing technology from these countries, but most countries are reluctant to export technology to China. Only a Czech company is willing to transfer technology, and the price is extremely high. "This situation has prompted us to establish China's own crankshaft production base." In 2001, the relevant state departments approved the “joint venture to build a marine semi-combined crankshaft localization projectâ€. In April 2002, Shanghai Electric (Group) Corporation and Hudong Zhonghua Shipbuilding (Group) Co., Ltd. invested nearly 200 million yuan. , Shanghai Ship Crankshaft Co., Ltd. was established, and the road to localization of marine crankshafts in China began.
Lin Yiwu, senior engineer of Shanghai Marine Crankshaft Co., Ltd., said that the crankshaft technology requires very high precision and is very difficult. For example, the red-sleeve technology of the crankshaft requires no more than 8 wires, or 0.08 mm, in the manufacturing process. To this end, the company has cooperated with a number of universities and research institutes such as East China University of Science and Technology, Institute of Microsystems and Information Technology of the Chinese Academy of Sciences, etc. on the basis of collecting and analyzing domestic and foreign materials and experience, and has completed 6 joint research projects. The research of the subject has a crankshaft making technology with completely independent intellectual property rights. At present, it has applied for 10 national patents, of which 7 are invention patents. Through scientific research and the use of technology with independent intellectual property rights, in early 2005, China's first domestically produced crankshaft was successfully launched, and all the indicators met the design requirements. In 2006, China produced 15 crankshafts. In 2007, it plans to manufacture 50 crankshafts, and 10 have been completed.
It is understood that the variety of crankshafts that can be manufactured in China is relatively complete, and it has covered 90% of the crankshaft types required for low-speed diesel engines. Liu Chaoming said that the crankshaft produced in China has not only been fully localized, but also exported to South Korea. It is estimated that the production capacity of China's crankshaft will reach 240 next year and about 80 exports. Liu Chaoming said that because 10% of the cost of a large ship is in diesel engines, and 10% of the cost of diesel engines is occupied by crankshafts, the domestic production of Chinese marine crankshafts not only breaks the monopoly of foreign crankshaft technology, but also has a major economy. significance.