CN219948534U - Shaftless propeller driven by intermediate rotor axial flux motor - Google Patents

Abstract

The utility model belongs to the technical field of propellers, and particularly relates to a shaftless propeller driven by an intermediate rotor axial flux motor. The shaftless propeller comprises an outer shell, an axial flux motor and a propeller, wherein the outer shell is arranged on the outer side of the axial flux motor, a through hole extending along the axial direction of the axial flux motor is formed in the axial flux motor, and the propeller is arranged in the through hole. The axial flux motor comprises a rotor assembly, two wear-resistant water lubrication bearings and two stator assemblies, wherein the stator assemblies are positioned on two sides of the rotor assembly along the axial direction of the rotor assembly and are fixedly connected with the outer shell, the wear-resistant water lubrication bearings are positioned between the rotor assembly and the stator assemblies and are fixedly connected with the stator assemblies, and the screw is fixedly connected in a through hole of the rotor assembly. The wear-resistant water-lubricated bearing is made of a high-molecular water-lubricated bearing material, and the material has good wear resistance, corrosion resistance and self-lubricating property, replaces the traditional bearing and other structures, simplifies the structure and the size, saves the cost and reduces the energy consumption.

Description

Shaftless propeller driven by intermediate rotor axial flux motor

Technical Field

The utility model belongs to the technical field of propellers, and particularly relates to a shaftless propeller driven by an intermediate rotor axial flux motor.

Background

With the rapid development of ocean engineering, the performance of the propeller is required to be higher and higher. The existing radial shaft-driven propeller has the defects of multiple parts, complex structure, high energy consumption and difficult construction.

On one hand, the central shaft system of the existing radial magnetic flux axial propeller adopts a rolling bearing, and has strict requirements on bearing selection, and the bearings of the existing radial magnetic flux axial propeller are mostly ceramic bearings, so that the defects of high manufacturing cost and low bearing capacity are overcome; on the one hand, in the marine environment, in order to ensure the sealing type of the rolling bearing, the assembly structure of the rolling bearing is complex; on the other hand, the radial magnetic flux stator component and the rotor component have larger volume, which is not beneficial to the miniaturization development of the propeller.

Disclosure of Invention

The utility model aims to provide a shaftless propeller driven by an axial flux motor of an intermediate rotor, which aims to solve the problems of large volume, complex structure and high energy consumption of the existing radial flux propeller.

The embodiment of the utility model can be realized by the following technical scheme:

the shaftless propeller driven by the middle rotor axial flux motor comprises an outer shell, an axial flux motor and a propeller, wherein the outer shell is arranged on the outer side of the axial flux motor, the axial flux motor is provided with a through hole extending along the axial direction of the axial flux motor, and the propeller is arranged in the through hole;

the axial flux motor comprises a rotor assembly, two wear-resistant water lubrication bearings and two stator assemblies, wherein the stator assemblies are positioned on two sides of the rotor assembly along the axial direction of the rotor assembly and are fixedly connected with the outer shell, the wear-resistant water lubrication bearings are positioned between the rotor assembly and the stator assemblies and are fixedly connected with the stator assemblies, and the screw is fixedly connected in a through hole of the rotor assembly.

Preferably, the wear-resistant water-lubricated bearing is made of a high molecular water-lubricated bearing material.

Further, the wear-resistant water-lubricated bearing is of a circular ring structure, and a plurality of grooves which extend along the radial direction and are uniformly distributed in the circumferential direction are formed in the end face of the rotor assembly.

Further, the shaftless propeller further comprises two limiting sleeves, wherein the limiting sleeves are of cylindrical structures, and the limiting sleeves are positioned at two sides of the axial direction of the propeller and are abutted with two sides of the axial direction of the propeller;

the limiting sleeve is fixedly connected in the through hole of the stator assembly, or is fixedly connected to two sides of the through hole of the rotor assembly in the axial direction, or is integrally formed with the outer shell.

Further, the rotor assembly includes a rotor housing and a plurality of permanent magnets mounted inside the rotor housing;

the rotor shell comprises a rotor shell and a rotor end cover, the rotor shell and the rotor end cover form a cavity for accommodating the permanent magnet, the rotor shell is of a cylindrical structure with one end open, and the rotor end cover is fixedly connected with the open end of the rotor shell;

the gap between the rotor shell and the permanent magnet is filled with glue solution for sealing the permanent magnet.

Further, square grooves corresponding to the permanent magnets one by one are formed in the rotor shell, and the permanent magnets are in interference fit with the square grooves;

the permanent magnets are uniformly distributed along the radial extension and the circumferential direction of the rotor shell.

Further, the stator assembly comprises a stator shell, a stator winding and a stator core, wherein the stator winding and the stator core are installed inside the stator shell, and the stator winding is wound on the stator core;

the stator shell comprises a stator shell and a stator end cover, the stator shell is fixedly connected with the shell, a cavity for accommodating the stator core is formed by the stator shell and the stator end cover, the stator shell is of a cylindrical structure with one end open, and the stator end cover is fixedly connected with the open end of the stator shell;

and the gap between the stator shell and the stator core and between the stator shell and the stator winding is filled with glue solution for sealing the stator core and the stator winding.

Further, the stator core is of a circular ring structure, and a plurality of protrusions for winding the stator winding are convexly arranged at one end of the stator core, which faces the rotor assembly.

Further, the shaftless propeller further comprises a circuit board shell positioned outside the shell, and the circuit board shell is fixedly connected with the shell;

the circuit board housing is internally packaged with a driving circuit board, and the circuits of the stator windings are uniformly output into the circuit board housing and welded with the driving circuit board;

and the side wall of the circuit board shell is provided with an outlet sleeve for an external circuit to enter, and the external circuit enters the circuit board shell from the outlet sleeve and is welded with the driving circuit board.

Further, the propeller comprises a circular ring and blades, wherein the blades are fixedly connected to the inner side of the circular ring and form an integrated structure with the circular ring.

The shaftless propeller driven by the intermediate rotor axial flux motor provided by the embodiment of the utility model has at least the following beneficial effects:

(1) The shaftless propeller adopts the axial flux motor, the permanent magnet of the axial flux motor is flat, and compared with the strip magnet of the radial flux motor, the axial distance of the propeller is shortened, so that the axial length of the whole structure of the propeller is shortened, and the volume of the propeller is further shortened;

(2) The wear-resistant water lubrication bearing is arranged between the stator component and the rotor component of the axial flux motor, and is made of a polymer water lubrication bearing material, so that the wear-resistant water lubrication bearing replaces the traditional bearing and other structures, and on one hand, the material has good wear resistance and self-lubrication performance, the structure and the size of the propeller are simplified, and the overall structure of the propeller is simpler and more compact; on the other hand, the material has good corrosion resistance, can resist chloride ion corrosion in seawater, so that the propeller still has good application prospect in marine environment, and the sealing structure is not required to be designed to independently protect the wear-resistant water lubrication bearing, thereby saving cost, reducing energy consumption and further reducing the volume of the propeller.

Drawings

FIG. 1 is a block diagram of an overall configuration of a midrotor axial flux motor driven shaftless propeller of the present utility model;

FIG. 2 is an overall block diagram of another angle of a midrotor axial flux motor driven shaftless propeller of the present utility model;

FIG. 3 is an exploded view of a non-shaft propeller driven by an intermediate rotor axial flux motor according to the present utility model;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 5 is an overall structure diagram of the connection of the stator winding and the stator core in the present utility model;

FIG. 6 is an overall block diagram of the rotor housing and permanent magnet connection of the present utility model;

fig. 7 is an overall structure diagram of the connection of the stator housing with the stator winding and the stator core in the present utility model.

Reference numerals: 1. the rotor comprises an outer shell, 2, a rotor assembly, 21, a rotor shell, 23, a permanent magnet, 3, a wear-resistant water lubrication bearing, 41, a stator winding, 42, a stator core, 43, a stator shell, 44, a stator end cover, 5, a propeller, 6, a driving circuit board, 7, a wire outlet sleeve, 8, a circuit board shell, 9 and a limiting sleeve.

Detailed Description

The present utility model will be further described below based on preferred embodiments with reference to the accompanying drawings.

The terminology used in the description presented herein is for the purpose of describing embodiments of the utility model and is not intended to be limiting of the utility model. Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, as if they were fixedly connected, detachably connected, or integrally connected, for example; the two components can be connected mechanically, directly or indirectly through an intermediate medium, and can be communicated internally. The specific meaning of the above terms in the present utility model will be specifically understood by those skilled in the art.

In addition, in the description of the embodiments of the present utility model, various components on the drawings are enlarged or reduced for the convenience of understanding, but this is not intended to limit the scope of the present utility model.

Fig. 1 to 4 show respectively an overall construction view, an exploded view and a sectional view of different angles of a shaftless propeller driven by an axial flux motor of an intermediate rotor according to the present utility model, which shaftless propeller comprises an outer casing 1, an axial flux motor and a propeller 5, as shown in fig. 1 to 4, wherein the outer casing 1 is mounted on the outside of the axial flux motor; the axial flux motor is provided with a through hole extending in its axial direction, in which through hole the propeller 5 is mounted.

Further, as shown in fig. 3, the shaftless propeller further comprises two limiting sleeves 9, wherein the limiting sleeves 9 are of cylindrical structures, and the limiting sleeves 9 are located at two sides of the axial direction of the propeller 5 and are abutted with two sides of the axial direction of the propeller 5, so that the axial limiting of the propeller 5 is realized, and the propeller 5 is prevented from falling off along the axial direction of the shaftless propeller.

Specifically, as shown in fig. 3, the axial flux motor comprises a rotor assembly 2 and two stator assemblies, a propeller 5 is fixedly connected in a through hole of the rotor assembly 2, and the propeller 5 and the rotor assembly 2 can synchronously rotate circumferentially; the stator assembly is arranged on two sides of the rotor assembly 2 along the axial direction of the stator assembly, and the limit sleeve 9 is fixedly connected in a through hole of the stator assembly, or is fixedly connected on two sides of the through hole of the rotor assembly 2 along the axial direction, or is integrally formed with the outer shell 1.

Further, when the limit sleeve 9 is fixedly connected in the through hole of the stator assembly, the rotor assembly 2 and the propeller 5 can rotate circumferentially relative to the stator assembly and the limit sleeve 9; when the limit sleeve 9 is fixedly connected to two sides of the through hole of the rotor assembly 2 in the axial direction, the rotor assembly 2, the limit sleeve 9 and the propeller 5 can rotate circumferentially relative to the stator assembly; when the limit sleeve 9 and the outer shell 1 are integrally formed, the rotor assembly 2 and the propeller 5 can rotate circumferentially relative to the stator assembly and the limit sleeve 9.

It is conceivable that the propeller 5 may be fixedly connected to the rotor assembly 2 by means of adhesive, welding, screw connection, etc. For ease of processing, the propeller 5 of the present utility model is bonded to the interior of the rotor assembly 2.

It is conceivable that the stop collar 9 may be fixedly connected to the stator assembly by means of bonding, welding, screw connection, etc. For convenience in processing, the limit sleeve 9 is adhered to the inside of the stator assembly.

Further, the propeller 5 in the present utility model includes a ring and blades, and the blades are connected to the inner side of the ring and form an integrated structure with the ring.

It is conceivable that the blades may be formed as an integrated structure with the ring by means of welding, gluing or screwing.

Further, since the rotor assembly 2 can rotate circumferentially relative to the stator assembly, the existing propeller generally realizes the relative rotation of the rotor assembly 2 and the stator assembly through a bearing and other structures, the axial flux motor further comprises two wear-resistant water lubrication bearings 3, the wear-resistant water lubrication bearings 3 are of a circular ring structure, are positioned between the rotor assembly 2 and the stator assembly and are fixedly connected with the stator assembly, and replace the traditional bearing and other structures, so that the propeller does not need to be provided with bearings, and the bearing selection is not required to be considered.

Specifically, the wear-resistant water-lubricated bearing 3 is fixedly connected with the stator assembly in an adhesive manner, and the wear-resistant water-lubricated bearing 3 is adhered to one side of the stator assembly facing the rotor assembly 2.

Further, the wear-resistant water lubricated bearing 3 is made of a high molecular water lubricated bearing material. On one hand, the material has excellent wear resistance and self-lubricating performance, so that the wear-resistant water-lubricated bearing 3 can replace the traditional bearing and other structures, the structure and the size of the propeller are simplified, and the overall structure of the propeller is simpler and more compact; on the other hand, the material has good corrosion resistance, can resist chloride ion corrosion in seawater, so that the propeller still has good application prospect in marine environment, and the wear-resistant water lubrication bearing 3 is not required to be independently protected by a sealing structure, thereby saving cost, reducing energy consumption and further reducing the volume of the propeller.

As shown in fig. 3, in some preferred embodiments of the present utility model, the end surface of the wear-resistant water lubricated bearing 3 facing the rotor assembly 2 is provided with a plurality of grooves extending radially and uniformly distributed circumferentially, and the grooves can discharge the foreign matters such as silt on the contact end surface of the rotor assembly 2 and the stator assembly, so as to prevent the foreign matters such as silt from wearing the stator assembly and the rotor assembly 2 during the running process of the propeller, and further prolong the service lives of the stator assembly and the rotor assembly 2.

Further, the wear-resistant water lubricated bearing 3 is fixedly connected with the stator assembly in an adhesive manner. On the one hand, this mode has the advantage of processing convenience, with low costs, and on the other hand, this mode makes between wear-resisting water lubricated bearing 3 and the stator module need not to set up adaptive structure such as through-hole, reduces the wearing and tearing to the rotor module.

The specific structure of the rotor assembly 2 of the present utility model will be described in detail below, and as shown in fig. 3 and 6, the rotor assembly 2 includes a rotor housing and a plurality of permanent magnets 23 mounted inside the rotor housing, specifically, the rotor housing includes a rotor case 21 and a rotor end cover, the rotor case 21 and the rotor end cover form a cavity for accommodating the permanent magnets 23, the rotor case 21 is a cylindrical structure with one end opened, and the rotor end cover is fixedly connected with the open end of the rotor case 21.

Further, as shown in fig. 6, the permanent magnets 23 are uniformly distributed along the radial extension and the circumferential direction of the rotor housing 21, and the rotor housing 21 is provided with square grooves corresponding to the permanent magnets 23 one by one, and the permanent magnets 23 are in interference fit with the square grooves.

Further, after the permanent magnet 23 is mounted in the rotor housing, stable connection between the permanent magnet 23 and the rotor housing can be further realized through a glue filling and sealing mode, and glue liquid for sealing the permanent magnet 23 is filled in a gap between the rotor housing and the permanent magnet 23, so that a good sealing environment can be provided for the rotor assembly 2, and the permanent magnet 23 is prevented from being damaged due to the fact that liquid enters the rotor assembly 2.

The specific structure of the stator assembly according to the present utility model will be described in detail, and as shown in fig. 3, 5 and 7, the stator assembly includes a stator housing, and a stator winding 41 and a stator core 42 mounted inside the stator housing, the stator winding 41 being wound around the stator core 42.

Specifically, the stator housing includes a stator housing 43 and a stator end cover 44, the stator housing 43 is fixedly connected with the housing 1, the stator housing 43 and the stator end cover 44 form a cavity for accommodating the stator core 42, the stator housing 43 is a cylindrical structure with one end open, and the stator end cover 44 is fixedly connected with the open end of the stator housing 43.

Further, as shown in fig. 3 and 5, the stator core 42 is of a circular ring-like structure, and a plurality of protrusions around which the stator winding 41 is wound are provided protruding toward one end of the rotor assembly 2.

In some preferred embodiments of the present utility model, stator core 42 is integrally formed instead of the conventional silicon steel sheet lamination process. On one hand, during the advancing process of the propeller, the energy loss caused by vortex can be reduced; on the other hand, the working time can be greatly saved, and the working efficiency is improved.

Specifically, the present utility model realizes the integral molding of the stator core 42 by the iron powder die casting process.

In some preferred embodiments of the utility model, for ease of assembly, the open end of the stator assembly is disposed away from the rotor assembly 2, and a stator end cap 44 is attached to the end of the stator housing 43 remote from the rotor assembly.

It is conceivable that the stator end cover 44 and the stator housing 43 may be fixedly connected by means of gluing, welding, screw connection, etc., and in the present utility model, the stator end cover 44 and the stator housing 43 are fixedly connected by means of glue filling and sealing, i.e. the gaps between the stator housing and the stator core 42, the stator winding 41 are filled with glue for sealing the stator core 42, the stator winding 41. On one hand, the glue solution encapsulation has the advantages of simple process, convenient manufacture and shortened manufacturing period; on the other hand, the glue potting provides a good sealing environment within the stator assembly, preventing liquids from entering the stator assembly and damaging the stator core 42 and stator windings 41.

It is conceivable that the stator housing 43 may be fixedly connected to the outer housing 1 by means of gluing, welding, screwing, integrally forming, etc. In the present utility model, for convenience of assembly, one stator housing 43 is fixedly connected with the outer housing 1 by means of cementing, and the other stator housing 43 is fixedly connected with the outer housing 1 by means of integral molding.

In some preferred embodiments of the present utility model, the propeller further comprises a circuit board housing 8 located outside the outer casing 1, the circuit board housing 8 is fixedly connected with the outer casing 1, the driving circuit board 6 is encapsulated in the circuit board housing 8, and the wires of the stator windings 41 are uniformly output to the circuit board housing 8 and welded with the driving circuit board 6.

Further, the side wall of the circuit board shell 8 is provided with an outlet sleeve 7 into which an external circuit enters, and the external circuit can enter the circuit board shell 8 from the outlet sleeve 7 and be welded with the driving circuit board 6, so that the electrical communication between external equipment and the propeller is realized.

Further, after the external wiring and the wiring of the stator winding 41 are connected to the drive wiring board 6, the inside of the wiring board case 8 is encapsulated with a glue solution. On the one hand, the stable connection of the external circuit, the circuit of the stator winding 41 and the driving circuit board 6 can be realized, and the problem of unstable electrical connection caused by shaking of the propeller is prevented; on the other hand, the sealing of the inside of the circuit board housing 8 can be realized, preventing the problem of circuit damage caused by liquid entering the inside of the circuit board housing 8.

It is conceivable that the circuit board housing 8 may be fixedly connected to the outer housing 1 by means of gluing, welding, screwing, integrally forming, etc. The circuit board shell 8 is fixedly connected with the shell body 1 in an integrated mode, and the mode has the characteristics of convenience in assembly, cost saving and stable connection.

While the foregoing is directed to embodiments of the present utility model, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (10)

1. An intermediate rotor axial flux motor driven shaftless propeller, characterized by:

the shaftless propeller comprises an outer shell (1), an axial flux motor and a propeller (5), wherein the outer shell (1) is arranged on the outer side of the axial flux motor, a through hole extending along the axial direction of the axial flux motor is formed in the axial flux motor, and the propeller (5) is arranged in the through hole;

the axial flux motor comprises a rotor assembly (2), two wear-resistant water lubrication bearings (3) and two stator assemblies, wherein the stator assemblies are positioned on two sides of the rotor assembly (2) along the axial direction of the rotor assembly and are fixedly connected with the outer shell (1), the wear-resistant water lubrication bearings (3) are positioned between the rotor assembly (2) and the stator assemblies and are fixedly connected with the stator assemblies, and the screw propeller (5) is fixedly connected in a through hole of the rotor assembly (2).

2. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 1, wherein:

the wear-resistant water-lubricated bearing (3) is made of a high-molecular water-lubricated bearing material.

3. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 1, wherein:

the wear-resistant water lubrication bearing (3) is of a circular ring structure, and a plurality of grooves which extend along the radial direction and are uniformly distributed in the circumferential direction are formed in the end face of the rotor assembly (2).

4. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 1, wherein:

the shaftless propeller further comprises two limiting sleeves (9), wherein the limiting sleeves (9) are of cylindrical structures, and the limiting sleeves (9) are positioned on two sides of the propeller (5) in the axial direction and are abutted with two sides of the propeller (5) in the axial direction;

the limiting sleeve (9) is fixedly connected in the through hole of the stator assembly, or is fixedly connected to two sides of the through hole of the rotor assembly (2) in the axial direction, or is integrally formed with the outer shell (1).

5. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 1, wherein:

the rotor assembly (2) comprises a rotor housing and a plurality of permanent magnets (23) mounted inside the rotor housing;

the rotor shell comprises a rotor shell (21) and a rotor end cover, wherein the rotor shell (21) and the rotor end cover form a cavity for accommodating the permanent magnet (23), the rotor shell (21) is of a cylindrical structure with one end open, and the rotor end cover is fixedly connected with the open end of the rotor shell (21);

the gap between the rotor shell and the permanent magnet (23) is filled with glue solution for sealing the permanent magnet (23).

6. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 5, wherein:

square grooves corresponding to the permanent magnets (23) one by one are formed in the rotor shell (21), and the permanent magnets (23) are in interference fit with the square grooves;

the permanent magnets (23) are uniformly distributed along the radial extension and circumferential direction of the rotor housing (21).

7. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 1, wherein:

the stator assembly comprises a stator shell, a stator winding (41) and a stator core (42) which are arranged in the stator shell, wherein the stator winding (41) is wound on the stator core (42);

the stator shell comprises a stator shell (43) and a stator end cover (44), the stator shell (43) is fixedly connected with the shell (1), the stator shell (43) and the stator end cover (44) form a cavity for accommodating a stator core (42), the stator shell (43) is of a cylindrical structure with one end open, and the stator end cover (44) is fixedly connected with the open end of the stator shell (43);

and the gaps between the stator shell and the stator iron core (42) and between the stator shell and the stator winding (41) are filled with glue liquid for sealing the stator iron core (42) and the stator winding (41).

8. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 7, wherein:

the stator core (42) is of a circular ring structure, and a plurality of protrusions which are wound around the stator winding (41) are convexly arranged at one end of the stator core, which faces the rotor assembly (2).

9. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 7, wherein:

the shaftless propeller further comprises a circuit board shell (8) positioned outside the outer shell (1), and the circuit board shell (8) is fixedly connected with the outer shell (1);

a driving circuit board (6) is packaged in the circuit board shell (8), and the circuits of the stator windings (41) are uniformly output into the circuit board shell (8) and welded with the driving circuit board (6);

an outlet sleeve (7) for entering an external circuit is arranged on the side wall of the circuit board shell (8), and the external circuit enters the circuit board shell (8) from the outlet sleeve (7) and is welded with the driving circuit board (6).

10. An intermediate rotor axial flux motor driven shaftless propeller as defined in claim 1, wherein:

the propeller (5) comprises a circular ring and blades, wherein the blades are fixedly connected to the inner side of the circular ring and form an integrated structure with the circular ring.