A cantilever twin-screw water jet propulsion pump

Abstract

The invention discloses a cantilever type double-screw water-jet propulsion pump. Besides the components of a common double-screw pump, the cantilever type double-screw water-jet propulsion pump comprises a water inlet, a double-bearing structure for balancing an axial force and a radial force, a double-screw structure and a jet nozzle, wherein a tooth type curve of the double-screw structure is an involute. According to the cantilever type double-screw water-jet propulsion pump, screws are rotated to push water flow, and a carrier in water is pushed forward by a reaction force of high-speed water flow jetted from the cantilever type double-screw water-jet propulsion pump. A cantilever type structure is simple and efficient, and can reduce hydraulic loss fully and generate sufficient thrust to improve the propulsion capability of the carrier in water. The double-screw structure has the characteristics of no stir, no pulsation, smooth output of various media, small mechanical vibration, low noise and the like. Since a pump body structure ensures that a pumping liquid always exists as a sealing liquid in a working element of the pump, the cantilever type double-screw water-jet propulsion pump has high self-suction capacity and is commonly used for multi-phase mixed transportation. For example, the cantilever type double-screw water-jet propulsion pump can be used for transporting oils, water, paste, milk-like substances, pitch and other chemical media.

Description

technical field [0001] The invention belongs to the field of machinery, in particular to a cantilever type twin-screw water jet propulsion pump which pushes water flow through screw rotation and utilizes the reaction force of the sprayed high-speed water flow to push a carrier in water forward. Background technique [0002] Water-jet propulsion is a special propulsion method that has been rapidly developed and matured in the past 20 years. It uses the reaction force of the high-speed water jetted by the water-jet propulsion pump in the water-jet propulsion device to push the carrier in the water forward, and through the steering and reversing mechanism Distributing and changing the direction of the jet stream achieves carrier manipulation. Waterjet propulsion has the characteristics of high propulsion efficiency, low noise and vibration, simple transmission structure, good maneuverability and maneuverability, shallow draft, and strong cavitation resistance. It is widely used...

AI Technical Summary

Problems solved by technology

Water-jet propulsion pumps are the core components of water-jet propulsion devices. In the early days, they were mainly vane pumps such as axial flow pumps and mixed flow pumps. They have the advantages of high propulsion efficiency, strong anti-cavitation ability, good maneuverability and positioning, and stable work. But at the same time, there are also shortcomings such as high noise, large power loss, complicated reversing, and inconvenient maintenance.

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