CN-122009453-A - Drag-reducing underwater propeller

CN122009453ACN 122009453 ACN122009453 ACN 122009453ACN-122009453-A

Abstract

The invention relates to the technical field of underwater propulsion, in particular to a drag-reducing underwater propulsion, which comprises a rotor mounting seat, wherein the periphery of the rotor mounting seat is connected with an annular body through a plurality of ribs, a rotor coaxial with the annular body is arranged in the rotor mounting seat, and paddles are arranged on the rotor, and the drag-reducing underwater propulsion is characterized in that a vibration assembly is arranged in the annular body and comprises a radial resonance plate which is elastically connected close to the cavity wall of the annular body, one end of the radial resonance plate extends to one end of the annular body, the other end of the radial resonance plate is connected with the rotor mounting seat to realize resonance, a stepped groove is formed in the end of the annular body, cavitation bubbles generated when the blades rotate at high speed in the water area surrounded by the annular body are vibrated to be broken or diluted to be small, cavitation erosion damage degree of cavitation bubbles to the surfaces of the blades is avoided, service lives of the blades and the rotor where the blades are located are prolonged, and advancing resistance of the underwater propeller is reduced.

Inventors

FENG BAOLIN
HAN YE
WANG YONGQIANG
GUO HAIYAN
YUAN JIANBIN
WANG LEI
LI MINGMING
WEI WEI
WANG YING
WANG QING

Assignees

天津昊野科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260317

Claims (9)

1. The drag reduction underwater propeller comprises a rotor mounting seat (1), the periphery of the rotor mounting seat (1) is connected with an annular body (3) through a plurality of ribs (2), a rotor (4) which is coaxial with the annular body (3) is mounted in the rotor mounting seat (1), and a blade is mounted on the rotor (4), the drag reduction underwater propeller is characterized in that a vibration assembly (5) is arranged in the annular body (3), the vibration assembly (5) comprises a radial resonance plate (6) which is elastically connected with the cavity wall of the annular body (3) in a closing way, one end of the radial resonance plate (6) extends to one end of the annular body (3), the other end of the radial resonance plate (6) is connected with the rotor mounting seat (1) to realize resonance, a stepped groove (7) is formed in the end of the annular body (3), the vibration assembly (5) further comprises an elastic piece (8) which is inlaid in the stepped groove (7), the vibration assembly further comprises an axial vibration plate (9) which is connected with the elastic piece (8), a wavelength needle (10) is arranged on the axial vibration plate (9), one end of the radial resonance plate (6) extends to the wavelength needle (10) and extends towards the radial resonance plate (6) and the radial resonance plate (6) extends towards the radial resonance plate (4), but also to provide axial vibration to the blade.
2. The drag reducing underwater propeller of claim 1, wherein the radial resonance plate (6) is arcuate, and the curvature of the radial resonance plate (6) coincides with the curvature of the cavity wall of the annular body (3), and the extrados of the radial resonance plate (6) approximates the curvature of the cavity wall of the annular body (3).
3. Drag reducing underwater propeller according to claim 2, characterized in that the axial vibration plate (9) is annular with an inner ring diameter smaller than the cavity wall diameter of the annular body (3).
4. A drag reducing underwater propeller as claimed in claim 3, wherein the radial resonance plates (6) are a plurality of pieces in an annular array, gaps (13) are reserved between two adjacent radial resonance plates (6), two ends of each gap (13) are communicated with two ends of the annular body (3), radial vibration gaps (131) are reserved between the radial resonance plates (6) and the arc-shaped walls of the annular body (3), and two ends of each radial vibration gap (131) are communicated with two ends of the annular body (3).
5. The drag-reducing underwater propeller according to claim 4, wherein the stepped groove (7) is annular, the stepped groove (7) is at the same end as the extending end of the radial resonance plate (6), the elastic piece (8) is sponge, and the elastic piece (8) is annular and is inlaid in the annular stepped groove (7).
6. The drag-reducing underwater propeller according to claim 5, wherein a plurality of positioning grooves (11) are formed in the annular body (3), a spring (12) is installed in each positioning groove (11), and the springs (12) are connected to the arc-shaped outer wall surface of the radial resonance plate (6) after extending radially.
7. The drag reducing underwater propeller according to claim 6, wherein the wavelength extending needles (10) are a plurality of annular arrays, gaps are reserved between two adjacent wavelength extending needles (10), the extending length of each wavelength extending needle (10) is close to that of a blade, a first bending part (18) is arranged at one end of each wavelength extending needle (10) connected with the axial vibration plate (9), the first bending part (18) extends to the inner side of the radial resonance plate (6) from the outer side direction of the front end of the axial vibration plate (9), a second bending part (19) which is inclined and bent towards the blade direction is arranged, a first wavelength vibration space (20) is formed between the first bending part (18) and the same side end of the radial vibration gap (131), and a second wavelength vibration space (21) is formed between the second bending part (19) and the inner side of the radial vibration plate (6).
8. The drag reducing underwater propeller of claim 7, wherein the vibration assembly (5) further comprises a vibration motor (14) mounted on an outer end face of the axial vibration plate (9), and further comprises a control module disposed opposite to the vibration motor (14).
9. The drag reducing underwater propeller according to claim 8, wherein the rib (2) is provided with pressure relief grooves (15) along the length direction, the pressure relief grooves (15) penetrate through the front surface and the rear surface of the rib (2), the vibration assembly (5) further comprises flexible connecting rods (16) installed in the pressure relief grooves (15), free ends of the flexible connecting rods (16) radially extend and are connected with amplitude rods (17), and the amplitude rods (17) are connected to the inner arc surfaces of the radial resonance plates (6) after extending forwards along the inner arc surfaces of the radial resonance plates (6).

Description

Drag-reducing underwater propeller Technical Field The invention relates to the technical field of underwater propellers, in particular to a drag-reducing underwater propeller. Background The underwater propeller is an important component of an underwater vehicle, is an underwater boosting device utilizing a propeller propulsion principle, has a difference in the working principle of the same type of underwater propeller, and takes a common jet pump underwater propeller as an example, and comprises a water inlet, a guide cover, an impeller system, stator blades and a nozzle to form an integrated structure. When the underwater propeller blades rotate at high speed, the local pressure of the fluid is lower than the saturated vapor pressure, so that the liquid is vaporized to form cavitation bubbles. Cavitation bubbles generate micro-jet flow and shock waves when collapsing in a high-pressure area, so that the problems of cavitation erosion damage of the blade surface, aggravation of vibration of a mechanical life-span propeller and reduction of noise propulsion efficiency are caused, and therefore, how to solve cavitation bubbles and reduce the resistance of a horizontal propeller when traveling are solved. Disclosure of Invention In order to solve the problems, the invention provides a drag-reducing underwater propeller which comprises a rotor mounting seat, wherein the periphery of the rotor mounting seat is connected with an annular body through a plurality of ribs, a rotor coaxial with the annular body is mounted in the rotor mounting seat, a blade is mounted on the rotor, a vibration assembly is arranged in the annular body, the vibration assembly comprises a radial resonance plate which is elastically connected close to the cavity wall of the annular body, one end of the radial resonance plate extends to one end of the annular body, the other end of the radial resonance plate is connected with the rotor mounting seat to realize resonance, a stepped groove is formed in the end part of the annular body, the vibration assembly further comprises an elastic piece inlaid in the stepped groove, and further comprises an axial vibration plate connected to the elastic piece, a wavelength extending needle is arranged on the axial vibration plate, and the free end of the wavelength extending needle enters the inner side of the radial resonance plate and extends towards the axial direction of the rotor so as to amplify radial vibration of the radial resonance plate and simultaneously provide axial vibration for the blade. As a further preference, the radial resonator plate is arcuate and the curvature of the radial resonator plate coincides with the curvature of the cavity wall of the annular body and the extrados of the radial resonator plate approximates the curvature of the cavity wall of the annular body. As a further preferred feature, the axial vibration plate is annular with an inner ring diameter smaller than the cavity wall diameter of the annular body. As a further preferable mode, the radial resonance plates are a plurality of pieces of annular arrays, gaps are reserved between two adjacent radial resonance plates, two ends of each gap are communicated with two ends of the annular body, radial vibration gaps are reserved between the radial resonance plates and the arc-shaped wall of the annular body, and two ends of each radial vibration gap are communicated with two ends of the annular body. As a further preferable aspect, the step groove is annular, the step groove and the extending end of the radial resonance plate are at the same end, the elastic piece is sponge, and the elastic piece is annular and is inlaid in the annular step groove. As a further preferable mode, a plurality of positioning grooves are formed in the annular body, a spring is arranged in each positioning groove, and the spring is connected to the arc-shaped outer wall surface of the radial resonance plate after extending towards the radial direction. As a further preferable mode, the wavelength extending needles are a plurality of annular arrays, gaps are reserved between two adjacent wavelength extending needles, the extending length of each wavelength extending needle is close to that of a blade, one end of each extending needle connected with the axial vibrating plate is provided with a first bending part, the first bending part extends to the inner side of the radial vibrating plate from the outer side direction of the front end of the axial vibrating plate, the second bending part is obliquely bent towards the blade direction, a first wavelength vibrating space is formed between the first bending part and the same side end of the radial vibrating gap, and a second wavelength vibrating space is formed between the second bending part and the inner side of the radial vibrating plate. As a further preferred aspect, the vibration assembly further includes a vibration motor mounted on an outer end surface of the axial vibration plate,