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The efficiency of the counter-rotating propeller designed by us is 10%-15% higher than that of a conventional single propeller. The average working time between failures is greater than 5000 hours
This product was first created by Changfeng Company in 1987 and won a national patent. It is ten years earlier than this type of rudder propeller of other companies and has a number of independent intellectual property rights. The shaft at both ends of the rudder propeller avoids the high-speed mutual rotation of the inner and outer shaft sleeves (unilateral) of the counter-rotating propeller, which greatly reduces the heating of the bearing and improves the safety and reliability of the rudder propeller. In addition, the load of a single gear is small, and the size of the box under the gear and rudder propeller is also small. The small box tends to be streamlined to reduce the water flow pressure. In addition, under the same design conditions, the efficiency of the counter-rotating propeller designed by us is 10%-15% higher than that of a conventional single propeller. There are more advantages in this respect. Our company's azimuth counter-rotating propeller occupies more than 90% of the domestic market.