Liftable pump jet propulsion device

Abstract

The invention provides a liftable pump jet propulsion device which comprises a main body, a connecting device, a driving device, an obstacle removing device, a rotating shaft, a stator, a power device, a stabilizing device and a lifting device, wherein the obstacle removing device is arranged at the front end of the main body, the inner side of the obstacle removing device is fixedly connected with one end of the stator, the obstacle removing device is fixedly connected with one end of the stator, the other end is fixedly connected with a rotating shaft fixing shaft, the axis of the rotating shaft fixing shaft is axially connected with the rotating shaft, the rotating shaft penetrates through the interior of the main body, a water absorption fan is fixedly connected to the front end of the rotating shaft, a pressurizing fan is arranged on the rotating shaft behind the water absorption fan, and the pressurizing fan is cut into the inner wall of the main body. The invention provides a liftable pump jet propulsion device which aims to solve the problems that the device stops rotating and loses power due to the fact that the device is easily wound and blocked by aquatic plants during underwater operation, and the device can rise to avoid obstacles or the water bottom when encountering large obstacles or stranding, so that the device is prevented from being damaged or stranded and trapped.

Description

technical field [0001] The invention relates to the technical field of pump propulsion, in particular to a liftable pump jet propulsion device. Background technique [0002] At present, water ships and submarines mainly use propellers as mechanical propulsion devices. The propellers are used to convert the rotational power of the engine into propulsion by the rotation of the blades. The disadvantages are low propulsion efficiency and high noise. Although the performance of the water-jet propulsion pump is better than that of the propeller, the rotor of the pump-jet propeller will accelerate the water flow and pass it to the stator for rectification. After the water flow passes through the end of the transmission mechanism, the high-speed edge flow layer on the outside of the flow field will move closer to the center. A low-speed zone (low-pressure zone) is formed at the end of the transmission mechanism. No matter how high the velocity of the fluid is, this low-pressure are...

AI Technical Summary

Problems solved by technology

[0002] At present, water ships and submarines mainly use propellers as mechanical propulsion devices. The propellers are used to convert the rotational power of the engine into propulsion by the rotation of the blades. The disadvantages are low propulsion efficiency and high noise. As a new generation of propellers, pump jet propellers Although the performance of the water-jet propulsion pump is better than that of the propeller, the rotor of the pump-jet propeller will accelerate the water flow and pass it to the stator for rectification. After the water flow passes through the end of the transmission mechanism, the high-speed edge flow layer on the outside of the flow field will move closer to the center. A low speed zone (low pressure zone) is formed at the end of the transmission mechanism

No matter how high the velocity of the fluid is, this low-pressure area will exist. After a certain distance, the outer high-speed edge flow layer will move closer to this area. After moving closer, friction (wake vortex) will occur between the fluids, resulting in energy loss. Reduce the propulsion efficiency of the pump-jet propeller; the water-jet propulsion pump requires sufficient and relatively stable inflow

Also the water jet propulsion pump is less efficient at low speeds (less than 20 knots)

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