CN114476006A

CN114476006A - Rim propeller structure

Info

Publication number: CN114476006A
Application number: CN202210086318.0A
Authority: CN
Inventors: 代潞; 陈炼; 王雅楠; 周源; 熊用
Original assignee: Wuhan Institute of Marine Electric Propulsion China Shipbuilding Industry Corp No 712 Institute CSIC
Current assignee: Wuhan Institute of Marine Electric Propulsion China Shipbuilding Industry Corp No 712 Institute CSIC
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-05-13

Abstract

The invention discloses a rim propeller structure, which comprises a stator and a rotor, wherein the stator comprises a stator shell, a stator armature and a water lubrication bearing, the stator armature and the water lubrication bearing are arranged in a sealed space of the stator shell, one or more stator end surface convex edges are arranged on the inner side end surface of an opening at the front end of the stator shell, the rotor comprises a rotor outer ring positioned at the opening at the front end of the stator shell, a permanent magnet arranged in the rotor outer ring and a propeller connected to the rotor outer ring, an axial gap exists between the rotor outer ring and the stator shell, and the rotor end surface convex edges distributed at the axial gap in a staggered manner with the stator end surface convex edges are arranged on the outer edge surface of the rotor outer ring. The invention arranges the stator end surface convex edge and the rotor end surface convex edge at the axial gap between the stator and the rotor, reduces the flowing speed of fluid in the gap, further reduces the viscous friction loss of the rotor of the rim propeller, and can improve the overall efficiency of the rim propeller.

Description

Rim propeller structure

Technical Field

The invention belongs to the technical field of ship propulsion, and particularly relates to a rim propeller structure.

Background

As a highly integrated propeller device, the rim propeller cancels shafting driving of a traditional propulsion mode, and realizes the integrated integration of a motor and a propeller, so that the device has simple and compact integral structure, small volume and flexible installation.

The rotor of the rim propeller is usually immersed in water (or other fluid medium), when the rim propeller works, the fluid flows in the gap between the stator and the rotor under the action of centrifugal force and pressure difference between the front and the rear axial directions of the rotor, and all wall surfaces of the rotor, which are in contact with the fluid medium, generate power loss due to viscous friction of the fluid, and the power loss greatly influences the overall efficiency of the rim propeller.

At present, the surfaces of a stator and a rotor of the conventional rim propeller are designed into flat wall surfaces at the gap between the stator and the rotor, the design structure is simple, the processing difficulty is low, but when the rotor adopting the conventional structure works, the flow speed of fluid at the gap between the rotor and the stator is higher, the corresponding fluid viscosity friction loss is higher, and the system efficiency of the rim propeller is low.

Disclosure of Invention

In order to solve the above problems in the prior art, the present invention provides a rim propeller structure, which is optimized for the gap structure between the stator and the rotor.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a rim propeller structure, includes stator and rotor, the stator include stator housing and set up stator armature and the water lubricated bearing in stator housing's sealed space, stator housing front end open-ended medial extremity face is provided with one or more stator terminal surface protruding arriss, the rotor including the rotor outer loop that is located stator housing front end opening part, set up at the intra-annular permanent magnet of rotor outer loop and connect the screw on the rotor outer loop, rotor outer loop and stator housing between have the clearance, rotor outer loop outer fringe face be provided with the protruding arris of rotor terminal surface crisscross distribution at axial gap department of protruding arris of stator terminal surface.

According to the rim propeller structure, the convex edges on the end face of the stator and the convex edges on the end face of the rotor can be collectively called as the convex edges, and the radial interval between every two adjacent convex edges is not less than the maximum radial play distance of the rotor.

The flange propeller structure is characterized in that the protruding heights of the stator end face protruding edges and the rotor end face protruding edges are not more than the difference between the maximum axial moving distance of the rotor and the stator axial gap at the position.

According to the rim propeller structure, the stator shell is further connected with the propeller hub through the guide vanes, the guide vanes connect the stator shell with the propeller hub and play a supporting role, the tail end of the propeller is connected with the rotor inner ring, and the rotor inner ring is connected with the propeller hub through the water-lubricated bearing.

The section shapes of the stator end face convex edge and the rotor end face convex edge of the rim propeller structure are rectangular, V-shaped or other similar shapes.

The invention has the beneficial effects that: the stator end surface convex edges and the rotor end surface convex edges are arranged at the gaps of the stator and the rotor, so that the flowing speed of fluid in the gaps is reduced, the viscous friction loss of the rotor of the rim propeller is further reduced, and the system efficiency of the rim propeller is improved.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a stator according to a second embodiment of the present invention;

fig. 4 is a schematic structural view of a rotor according to a second embodiment of the present invention.

The figures are numbered: 1-stator, 11-stator housing, 12-stator armature, 13-stator end-face raised edge, 14-guide vane, 15-water-lubricated bearing, 16-propeller hub, 2-rotor, 21-rotor end-face raised edge, 22-permanent magnet, 23-rotor outer ring, 24-propeller, 25-rotor inner ring.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the various components in the drawings are drawn to a particular scale, these scaling relationships are exemplary only, and may be adjusted as needed by one skilled in the art to suit a particular application.

It should be noted that in the description of the present invention, the terms "axial", "inner", "outer", etc. indicate directions or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed or operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The rim propeller of the present invention comprises a stator 1 and a rotor 2, one embodiment of which is shown in fig. 1. When the rim propeller works, the stator armature 12 connected with an external power supply generates a rotating magnetic field to drive the rotor 2 to rotate, and the propeller 24 on the rotor 2 rotates to generate thrust. Thrust and radial load of the rotor 2 are transmitted to a hub 16 through a water lubricated bearing 15, and then the load is transmitted to a stator casing 11 through a guide vane 14, so that a navigation vehicle is pushed to advance, the water lubricated bearing 15 is contained in the stator 1, and a rotor end surface convex ridge 21 and a stator end surface convex ridge 13 are respectively arranged at an axial gap formed by the end surface of the rotor 2 at a low radius part and the end surface of the stator 1 corresponding to the rotor 2 in the axial direction, so that the effects of reducing viscous friction loss of the rotor 2 and improving the overall efficiency of the rim propeller can be realized.

Fig. 2 shows another embodiment of the rim propeller of the present invention with a hub 16 and guide vanes 14, in which the stator housing 11 is further connected with the hub 16 through the guide vanes 14, the guide vanes 14 connect the stator housing 11 with the hub 16 and serve as a support, and the end of the propeller 24 is connected with the hub 16 through a water lubricated bearing 15.

As shown in fig. 3, the stator 1 includes a stator housing 11, a stator armature 12, a stator end surface protruding rib 13, and a water lubricated bearing 15. The stator armature 12 is contained in a sealed space inside the stator housing 11, the water lubricated bearing 15 is fixedly connected with the hub 16, the guide vanes 14 connect and support the stator housing 11 and the hub 16, and the stator end surface convex ribs 13 are positioned on the inner end surface of the stator housing 11.

As shown in fig. 4, the rotor 2 includes a rotor end surface convex edge 21, a permanent magnet 22, a rotor outer ring 23, a propeller 24, and a rotor inner ring 25. The permanent magnet 22 is positioned in the rotor outer ring 23, the rotor end surface convex ribs 21 are positioned on the left and right end surfaces of the rotor outer ring 23, and the propeller 24 is connected with the rotor outer ring 23 and the rotor inner ring 25.

In this embodiment, the stator end raised ribs 13 and the rotor end raised ribs 21, which may be collectively referred to as raised ribs, are distributed in a staggered manner in the radial direction at the axial gap, each number is not less than 1, the radial interval between adjacent raised ribs is not less than the maximum radial play distance of the rotor 2, the height of the protruding surface of each raised rib does not exceed the difference between the axial gap of the stator and the rotor (the gap between the stator and the rotor) and the maximum axial play distance of the rotor 2, and the shape of each raised rib is rectangular, V-shaped or the like.

In the gap between the stator 1 and the rotor 2, the fluid flows in the axial direction under the influence of the pressure difference between the front and rear sides of the rotor 2, and the viscous friction loss of the wall surface of the rotor 1 increases as the flow velocity increases. According to the invention, the clearance between the stator 1 and the rotor 2 of the rim propeller is provided with a series of rotary convex ribs which are distributed in a staggered mode, namely the rotor end face convex rib 21 and the stator end face convex rib 13, so that the fluid in the clearance is enabled to achieve the effect of sudden shrinkage and sudden expansion in the flowing process, the flowing resistance is obviously increased, and the flowing speed of the fluid is slowed down.

When the rim propeller works, the fluid pressure difference between the front and the rear of the rotor can promote the fluid in the air gap to generate axial flow, the larger the axial flow speed is, the larger the viscous friction loss of the rotor is, the gap structure design of the rim propeller between the stator and the rotor can reduce the axial flow speed of the fluid in the gap at the moment, although the contact area of the rotor and the fluid is increased, the total viscous friction loss of the rotor is reduced comprehensively, and therefore the efficiency of the rim propeller is improved.

The above-described embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the inventive concept of the present invention, and these embodiments are within the scope of the present invention.

Claims

1. A rim propeller structure, includes stator (1) and rotor (2), its characterized in that: stator (1) including stator housing (11) and stator armature (12) and the water lubricated bearing (15) of setting in stator housing (11), stator housing (11) front end open-ended medial extremity face be provided with one or more stator terminal surface protruding arriss (13), rotor (2) including rotor outer loop (23) that are located stator housing (11) front end opening part, set up permanent magnet (22) in rotor outer loop (23) and screw (24) of connection on rotor outer loop (23), rotor outer loop (23) outer fringe face be provided with rotor terminal surface protruding arris (21) with stator terminal surface protruding arris (13) crisscross distribution.

2. A rim propeller arrangement according to claim 1, wherein adjacent stator end faces (13) and rotor end faces (21) are spaced apart by no less than the maximum radial play distance of the rotor (2).

3. A rim propeller arrangement according to claim 1, wherein the height of the stator end surface ridges (13) and the rotor end surface ridges (21) does not exceed the difference between the axial clearance of the stator and rotor (2) and the maximum axial play distance of the rotor (2).

4. A rim propeller arrangement according to claim 1, 2 or 3, c h a r a c t e r i z e d in that the stator housing (11) is further connected to a hub (16) via guide vanes (14), that the end of the propeller (24) is connected to a rotor inner ring (25), and that the rotor inner ring (25) is connected to the hub (16) via a water-lubricated bearing (15).

5. A rim propeller arrangement according to claim 1, 2 or 3, wherein the cross-sectional shape of the stator end-face projecting ribs (13) and the rotor end-face projecting ribs (21) is rectangular or V-shaped.