Pump-jet underwater propeller

Abstract

The invention relates to a pump-jet underwater propeller. The pump-jet underwater propeller comprises a U-shaped floating body, wherein a water inlet, a duct and a water jetting port are formed in each of two side walls; the water inlet is formed in the lower surface of the U-shaped floating body; a pump-jet propeller is arranged inside the duct; an electrical bin is formed in a connecting part; amotor and a power supply are arranged inside the electrical bin; the power supply is connected with the motor; the motor is enwrapped with a vibration-insulating pad; elbow supports are arranged on the upper surfaces of the two side walls of the U-shaped floating body; hand-holding parts are arranged on the upper surfaces of the U-shaped floating body; airbag sets are arranged on the hand-holdingparts; each elbow support comprises a first supporting surface and a second supporting surface connected with the first supporting surface; the sections of the first supporting surface and the secondsupporting surface are arc-shaped; the curvature radius of the first supporting surface is greater than that of the second supporting surface. The pump-jet underwater propeller has the advantages ofsufficient energy utilization, capabilities of reducing contact between two arms and water and effectively relieving fatigue of wrist joints and fingers of hands, small vibration, stable operation andguarantee of comfort and safety of a user.

Description

technical field [0001] The invention belongs to the field of swimming equipment, and relates to an underwater propulsion device, in particular to a pump jet water propulsion device for swimming and lifesaving in swimming pools and beach bathing beaches. Background technique [0002] Swimming equipment with underwater propulsion functions currently exist on the market, which can enable swimmers to navigate in water under electric drive. The equipment includes a water inlet, a water inlet and drainage channel, a pump jet propeller and a water outlet. The pump-jet propeller sucks the water in the water inlet and drainage channel from the water inlet and discharges it through the outlet, so as to realize the purpose of navigating in the water. Since the water inlet is set directly in front or on the side of the swimming equipment, when the swimming equipment is sailing on the water surface, it will not only contain water to be discharged but also a large amount of air when the ...

AI Technical Summary

Problems solved by technology

Since the water inlet is set directly in front or on the side of the swimming equipment, when the swimming equipment is sailing on the water surface, it will not only contain the water to be discharged but also a large amount of air when the swimming equipment sails on the water surface. It is unsaturated, the energy consumption of the pump-jet propeller is not directly proportional to the propulsion efficiency, and the energy utilization rate is low

In addition, long-term work will inevitably lead to large deviations in the rotating shaft of the pump jet propeller, and the service life of the rotating shaft will be low

Third, the water outlet is set directly behind or on the side wall of the swimming equipment. The water waves discharged from the water outlet have a great impact on the user, which invisibly increases the pressure on the user's chest. If it is used for a long time, it is easy to cause User fatigue or discomfort

Fourth, the motor used to drive the pump jet propeller will vibrate when it is working, which will cause the swimming equipment that can be propelled in the water to swing. If it is used for a long time, it will easily increase the fatigue of the user's hands or elbows. If the swimming circle is separated, the light ones will panic, and the severe ones may lead to drowning. The safety level is low and the navigation is unsafe.

Fifth, the user's arms are directly immersed in water or sea water, coupled with the friction between the arms and water or sea water, it is easy to cause the skin of the arms to turn white, and in severe cases, it is easy to cause dehydration of the user's body and bacterial infection and other symptoms

Relatively low customer satisfaction, gradually losing interest in water entertainment

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