A new type of pump-jet propeller with front side inclined guide vane and its design method

Abstract

The invention provides a novel front laterally-inclined guide vane type pump spraying propeller and a design method thereof. The novel front laterally-inclined guide vane type pump spraying propeller comprises front laterally-inclined guide vanes, a rear impeller, an annular guide pipe, a supporting bearing and a rotary shaft. A guide vane hub and the rear impeller are coaxially arranged in the annular guide pipe. The front laterally-inclined guide vanes are evenly and obliquely arranged on the outer wall of the guide vane hub and fixedly connected with the annular guide pipe. The rotary shaft sequentially and coaxially penetrates the guide vane hub and the rear impeller. A flow guide cap is arranged at the tail end of the rotary shaft. The rear impeller is located between the guide vane hub and the flow guide cap. The outer portion of the rotary shaft is fixedly sleeved with the rear impeller, and the rear impeller is driven by the rotary shaft to act. The rotary shaft is coaxially supported in the guide vane hub through the sliding supporting bearing. By the adoption of the novel front laterally-inclined guide vane type pump spraying propeller, the radiation noise is effectively lowered, the structural strength is improved, and the propeller is suitable for anti-impact and low-noise propelling of an underwater navigation body.

Description

technical field [0001] The invention belongs to the field of pump-jet propulsion, and in particular relates to a novel front side inclined guide vane type pump-jet propeller and a design method thereof. Background technique [0002] With the occurrence of the Malaysia Airlines MH370 disaster and the development of related search and rescue work, the American "Bluefin Tuna" autonomous aircraft has continuously come into people's sight, and the public has a further understanding of the importance of underwater detectors. Acoustic invisibility is one of the important performance indicators of underwater vehicles, and it is also an important guarantee for underwater vehicles to complete their missions. Probability of sonar detection. As the core component of the propulsion system of the underwater vehicle, the propeller plays a vital role in the acoustic stealth performance of the underwater vehicle. This is because: on the one hand, with the emergence of shock and noise reduc...

AI Technical Summary

Problems solved by technology

This is because: on the one hand, with the emergence of shock and noise reduction technologies such as cabins, floating rafts, vibration isolators, and flexible joints, the mechanical noise of underwater vehicles has gradually been effectively treated and controlled; on the other hand, the propulsion The direct radiated noise of the pump through the water inlet pipeline cannot be eliminated by vibration isolation equipment, and the reduction of its radiated noise can only be solved by the design of low-noise propellers

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