CN111641308B - A ring-shaped electric propulsor driven by an axial flux motor - Google Patents

A ring-shaped electric propulsor driven by an axial flux motor Download PDF

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Publication number
CN111641308B
CN111641308B CN202010489204.1A CN202010489204A CN111641308B CN 111641308 B CN111641308 B CN 111641308B CN 202010489204 A CN202010489204 A CN 202010489204A CN 111641308 B CN111641308 B CN 111641308B
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Prior art keywords
propeller
wear
assembly
rotor
stator
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CN111641308A (en
Inventor
郑锐聪
邱湘瑶
刘福超
邵志江
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Guangdong Hantuda Technology Co ltd
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Guangdong Hantuda Technology Co ltd
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/04—Machines with one rotor and two stators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to an annular electric propeller driven by an axial flux motor. The annular electric propeller directly drives the propeller to rotate by adopting the axial magnetic flux motor arranged in water, so that intermediate transmission equipment is omitted, a rotor and propeller assembly is supported by a bearing arranged in water and transmits thrust to the motor and the ship body, intermediate transmission loss between the motor and the propeller is reduced, efficiency is improved, a propulsion system structure is simplified, noise and vibration are reduced, and the like.

Description

Annular electric propeller driven by axial flux motor
Technical Field
The invention belongs to the technical field of ship turbine propellers, and particularly relates to an annular electric propeller driven by an axial flux motor.
Background
With the development of electric propulsion technology, electric propulsion systems are increasingly applied to ships. The common electric propulsion system comprises a speed change gear box, a shaft system (comprising a shaft, a coupling, various bearings, a bearing seat, a stern tube seal), a propeller and the like, wherein the propulsion mode of the electric propulsion system is that after the speed change gear box is driven by a motor to reduce speed, the shaft system and the propeller are driven to rotate, and the forward or backward thrust of a ship is generated. The propulsion mode has the following problems of complex structure, numerous parts, high failure rate, large occupied space and heavy weight, low propulsion efficiency, energy loss generated by meshing of gears through the transmission of the components such as gears, shafting and the like, high friction force and high friction power consumption, and the transmission links generate intermediate transmission loss, reduce the propulsion efficiency of the system, vibrate and cause noise due to meshing of the transmission gears, and generate turbulence after water flows through the shafting and the underwater appendage, the propellers rotate in the turbulence to generate excitation and cavitation, and the cavitation bursts to generate noise.
Disclosure of Invention
In order to reduce the intermediate transmission loss between the motor and the propeller, the efficiency is improved, the structure of the propulsion system is simplified, and noise, vibration and the like are reduced. The invention provides an annular electric propeller driven by an axial flux motor, which directly drives a propeller to rotate by adopting the axial flux motor arranged in water, so that middle transmission equipment is omitted, and a rotor and propeller assembly is supported by a bearing arranged in water and transmits thrust to the motor and a ship body.
In order to solve at least one of the above technical problems, the technical scheme adopted by the invention is as follows:
An annular electric propeller driven by an axial flux motor comprises a shell, the axial flux motor, a propeller and a bearing assembly, wherein,
The axial flux motor comprises an end face flange, a rotor assembly and a stator assembly, wherein the end face flange is respectively arranged at two ends of the shell, the stator assembly is fixed on the end face flange, and the rotor assembly and the stator assembly are arranged in parallel and are axially in the direction of an air gap magnetic field generated by the stator assembly;
The propeller is connected with the rotor assembly through a blade tip flange, and the blade tip flange is positioned outside the end face flange;
The bearing assembly comprises a thrust disc and wear-resistant sleeves, wherein the thrust disc is respectively fixed at two ends of the blade tip flange, the thrust disc is positioned at the outer side of the end face flange, and the wear-resistant sleeves are respectively arranged between the thrust disc and the end face flange and between the blade tip flange and the end face flange.
Further, the rotor assembly comprises a permanent magnet and a support frame, wherein the permanent magnet is embedded in the support frame, the support frame is arranged in parallel with the stator assembly, and one end of the support frame is connected with the blade tip flange.
Further, a first axial wear-resistant sleeve is arranged on the outer wall of the end face flange, a second axial wear-resistant sleeve is arranged on the inner wall of the thrust disc, and the second axial wear-resistant sleeve and the first axial wear-resistant sleeve form a thrust bearing pair and are used for bearing forward and reverse thrust of the propeller.
Further, a radial wear-resistant sleeve is further arranged on the outer wall of the end face flange, and the radial wear-resistant sleeve and the outer circular surface of the blade tip flange form a radial bearing pair for bearing the weight of the rotor assembly and the propeller and the centrifugal force formed by eccentricity in the rotating process.
Furthermore, the surfaces of the radial bearing pair and the thrust bearing pair are provided with water tanks for accommodating sediment in water and cooling the radial bearing pair and the thrust bearing pair through water flow.
Furthermore, the wear-resistant sleeves of the thrust bearing pair and the radial bearing pair are made of corrosion-resistant and wear-resistant metal or nonmetal materials, or polymer materials, or hard wear-resistant coatings.
Furthermore, the thrust bearing pair adopts paired permanent magnets or electromagnetic coils with the same poles repulsed to form a magnetic thrust bearing pair.
Further, the propeller is an integral propeller or a split propeller.
Further, two ends of the shell are respectively provided with a protective cover for protecting the axial flux motor and the bearing assembly.
Further, the number of the stator assemblies is two, and the number of the rotor assemblies is one and is arranged between the two stator assemblies.
Further, the stator assembly and the rotor assembly are multiple, and the rotor assembly and the stator assembly are alternately inserted into the shell.
The beneficial effects of the invention at least comprise:
1) The invention adopts an axial flux permanent magnet brushless motor (disc motor) with a double-stator single-rotor structure, and has balanced axial force at two sides of a rotor, high motor efficiency and compact structure, adopts a permanent magnet to replace a coil, reduces current loss and further improves motor efficiency and power factor compared with a separately excited motor;
2) The invention adopts a double-stator single-rotor structure, magnetic fields at two sides of the rotor generate electromagnetic force to drive the rotor, and meanwhile, the output and the power density are high, or more stators and rotors are integrated, so that the power density is improved, and a single-stator single-rotor structure can be adopted, the power density is reduced, the structure is simplified, and the cost is saved;
3) Because the rotor directly drives the propeller, vibration and noise caused by meshing of gears of a gear box in the traditional propulsion type are eliminated;
4) The invention cancels the inherent intermediate transmission parts such as the shaft coupling, the gear box, the shafting, the sliding bearing, the bearing pedestal, the stern tube stern sealing system and the like of the traditional electric propulsion type, only the motor, the propeller and the bearing group are remained, the structure is simpler, the reliability is higher, the weight is greatly reduced, and in addition, the motor is placed under water, so the space in the cabin is saved.
Drawings
Fig. 1 is a schematic view of the annular electric propeller structure of the present invention.
Fig. 2 is a schematic view of the structure of the integral propeller of the present invention.
Fig. 3 is a schematic view of the structure of the split propeller of the present invention.
Fig. 4 is a C-C cross-sectional view of the first embodiment of fig. 1.
Fig. 5 is a partial enlarged view of fig. 4.
Fig. 6 is a C-C cross-sectional view of the second embodiment of fig. 1.
Fig. 7 is a partial enlarged view of fig. 6.
Fig. 8 is a C-C cross-sectional view of the third embodiment of fig. 1.
Fig. 9 is a partial enlarged view of fig. 8.
The rotor comprises a shell 1, a propeller 2, a blade 201, a blade tip flange 202, an end face flange 3, a rotor assembly 4, a permanent magnet 401, a support frame 402, a stator assembly 5, a thrust disc 6, a first axial wear sleeve 7, a second axial wear sleeve 8, a radial wear sleeve 9 and a protective cover 10.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Embodiment 1 As shown in figures 1, 4 and 5, the annular electric propulsion device of the embodiment is of a double-stator single-rotor assembly structure and mainly comprises a shell, an axial flux motor, a propeller and a bearing assembly.
The axial flux motor adopts an axial flux permanent magnet brushless motor (disc motor), and the axial flux motor is different from a common motor, wherein an air gap is planar, the direction of an air gap magnetic field is axial, a current-carrying guide system is radially arranged, and a stator and a rotor are of a disc structure. The motor consists of a stator assembly, a rotor assembly, a shell and an end face flange. The left stator component and the right stator component are respectively fixed on the left end face flange and the right end face flange of the motor, and the middle is a single rotor component. The motor stator assembly is composed of an axial iron core and a coil, and can also be designed into a coreless structure, and the whole stator assembly is filled with a plurality of layers of sealing insulating filling protection materials, isolated from water and insulated. The rotor assembly is sandwiched between two stator assemblies and is parallel to the stator assemblies, rather than being radially concentric with the stator as in a conventional motor. The rotor component comprises a permanent magnet and a supporting frame, the permanent magnet is embedded in the supporting frame, the support frame is internally filled with sealing filling materials to prevent water from entering the interior to corrode the permanent magnet. The shell is a propeller shell, and the left end and the right end of the shell are connected with end flanges and a protective cover of the motor.
The rotor internal diameter is big, can hold the screw, and the screw is fixed on the blade tip flange, and blade tip flange is connected with rotor support frame internal diameter, and the rotor directly drives the screw and rotates, and motor rotational speed is screw rotational speed, does not need intermediate transmission links such as gear. The left and right stator components of the motor generate a rotating magnetic field after being electrified by a three-phase power supply, the permanent magnet in the middle rotor component generates electromagnetic force under the action of the rotating magnetic field, and the rotor rotates and outputs moment to drive the propeller to rotate in water to generate thrust for pushing the ship.
The screw propeller is a metal screw propeller or a composite screw propeller. The number of propeller blades is determined from hydrodynamic performance calculations and the number of blades may be 2, 3, 4, 5, 6 or more.
As shown in fig. 2, the propeller may be integral, with each blade tip being integrally connected to a common blade tip flange, and then connected to the rotor support frame via the blade tip flange.
As shown in fig. 3, the propeller blades can be split, each blade is fixed on the inner circle of the rotor support frame through a blade tip flange and is supported by the rotor and directly driven, and meanwhile, the propeller is split, so that the disassembly and replacement are convenient.
It can be understood that no matter the integral propeller or the split propeller is a hub-less propeller, each blade is fixed on the rotor through the propeller flange and is directly driven by the rotor, the motor rotating speed is the propeller rotating speed, a shaft system and a hub for supporting and driving are not needed, and intermediate driving links such as a driving gear are not needed.
The bearing assembly of the invention is a water lubricated bearing. Bearing the weight of the rotor assembly and the propeller, and bearing the forward and reverse thrust of the propeller. The bearing assembly consists of a left thrust disk, a right thrust disk, a thrust bearing pair and a radial bearing pair.
The radial bearing pair is formed by the left radial wear-resistant sleeve and the outer circular surface of the blade tip flange, the left radial bearing pair is formed by the left radial wear-resistant sleeve and the outer circular surface of the left side of the propeller flange, the right radial bearing pair is formed by the right radial wear-resistant sleeve and the outer circular surface of the right side of the propeller flange, the left radial bearing pair and the right radial bearing pair are concentric, the weight of the rotor assembly and the propeller is supported together, and the centrifugal force formed by the eccentricity in the rotating process of the rotor assembly and the propeller is borne.
The left thrust disk and the right thrust disk are connected with the two ends of the blade tip flange, the second wear-resistant sleeve on the left thrust disk and the first wear-resistant sleeve arranged on the motor left end face flange form a left thrust bearing pair, and the second wear-resistant sleeve on the right thrust disk and the first wear-resistant sleeve arranged on the motor right end face flange form a right thrust bearing pair to respectively bear the forward and reverse thrust of the propeller.
The wear-resistant sleeves of the thrust bearing pair and the radial bearing pair are made of corrosion-resistant and wear-resistant metal or nonmetal materials, or polymer materials, or hard wear-resistant coatings and the like. The surfaces of the radial bearing pair and the thrust bearing pair can be provided with water tanks for accommodating sediment in water and cooling the bearing pair through water flow.
The front and rear protective covers are arranged at the front and rear ends of the motor shell and play a role in protecting the motor and the rotating thrust disk, and the shapes of the front and rear protective covers can be made into circular arc shapes or streamline shapes, so that the resistance is reduced, and the hydrodynamic performance is improved.
In many cases, the radial dimensions of the propeller and the propeller cannot be further increased due to limited draft of the vessel or limited stern space, and in order to increase the power in the case of limited radial dimensions, the number of stator and rotor assemblies may be increased. With limited radial dimensions, the number of impeller-integrated motor stator assemblies and rotor assemblies increases, and the power and power density increases, while the number of impeller-integrated motor stator assemblies and rotor assemblies decreases, and the power and power density decreases.
Embodiment 2 when the power density requirement is not high, the single-stator single-rotor type can be adopted to reduce the power and the power density, as shown in fig. 6 and 7, the annular electric propeller of the embodiment is of a single-stator single-rotor assembly structure, and the number of the stator assemblies is set as a group, the rotor assemblies are driven by only one single-stator assembly, and the single-stator and the single-rotor type electric propeller has the advantages of low power, low power density, simple structure, low cost and suitability for propellers with lower power and low power density requirement.
Example 3 when the power needs to be larger and the diameter is not changed, i.e. the power density needs to be increased, this can be achieved in such a way that the number of stator assemblies and rotor assemblies is increased, i.e. a plurality of stator assemblies drive a plurality of rotor assemblies simultaneously, and a plurality of rotor assemblies drive a propeller simultaneously. As shown in fig. 8 and 9, the annular electric propeller of this embodiment has a three-stator double-rotor assembly structure, unlike embodiments 1 and 2, three stator assemblies drive two rotor assemblies, which simultaneously drive one propeller.
The motor adopts a multi-disc structure with three stators and double rotors, a front stator assembly and a rear stator assembly are respectively fixed on flanges on the front end face and the rear end face of the motor, and a middle stator assembly is embedded in the shell. The middle of each two stator assemblies is a rotor assembly, the middle of the front stator assembly and the middle stator assembly is a front rotor assembly, and the middle stator assembly are rear rotor assemblies. The support frames of the two rotor assemblies are fastened with the propeller blade tip flange together to push the propeller to rotate, so that the motor power is higher, and the power density is improved.
Similarly, more stator assemblies and rotor assemblies can be integrated on the propeller, and a propeller is driven at the same time, so that the power and the power density of the propeller are continuously improved, and the propeller can send out larger thrust by improving the power density and the power under the condition of limited radial size.
Embodiment 4 unlike embodiments 1-3 above, the thrust bearing pair may even use paired permanent magnets or electromagnetic coils with the same poles repelling each other to form a magnetic thrust bearing pair, and the magnetic thrust formed by the repulsion bears the weight of the rotor assembly and the propeller, and bears the forward and reverse thrust of the propeller, so that the contact friction is reduced, the loss is reduced, and the service life is prolonged.
In summary, the invention eliminates each transmission link from the motor to the propeller in the electric propulsion system, the motor directly drives the propeller, and the axial flux motor with a double-stator single-rotor structure or a multi-stator multi-rotor structure is adopted, thereby improving the power density and the efficiency and reducing the operation noise. In addition, the elimination of the intermediate transmission link reduces the weight, improves the reliability, reduces the occupied space in the cabin and improves the utilization rate of the space in the cabin. Is suitable for various electric ships.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
While embodiments of the present application have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by those skilled in the art within the scope of the application, as well as variations in the detailed description and application of the application may occur to those skilled in the art in light of the teachings of the application.

Claims (5)

1.一种轴向磁通电机驱动的环形电力推进器，其特征在于，包括：壳体、轴向磁通电机、螺旋桨和轴承组件，其中，1. An annular electric propulsion device driven by an axial flux motor, characterized in that it comprises: a housing, an axial flux motor, a propeller and a bearing assembly, wherein: 所述轴向磁通电机包括：端面法兰、转子组件和定子组件，所述壳体的两端分别设有所述端面法兰，所述定子组件固定于所述端面法兰上，所述转子组件与所述定子组件并列设置且与所述定子组件产生的气隙磁场方向为轴向；The axial flux motor comprises: an end face flange, a rotor assembly and a stator assembly, the end face flanges are respectively provided at both ends of the housing, the stator assembly is fixed on the end face flanges, the rotor assembly and the stator assembly are arranged in parallel, and the air gap magnetic field direction generated by the rotor assembly and the stator assembly is axial; 所述螺旋桨通过叶梢法兰与所述转子组件相连，所述叶梢法兰位于所述端面法兰的外侧；The propeller is connected to the rotor assembly via a blade tip flange, and the blade tip flange is located outside the end face flange; 所述轴承组件包括：推力盘和耐磨套，所述叶梢法兰的两端分别固定有所述推力盘，且所述推力盘位于所述端面法兰的外侧，所述耐磨套分别设置于所述推力盘与端面法兰之间以及所述叶梢法兰与端面法兰之间；The bearing assembly comprises: a thrust plate and a wear-resistant sleeve, the thrust plates are respectively fixed at both ends of the blade tip flange, and the thrust plate is located outside the end face flange, and the wear-resistant sleeve is respectively arranged between the thrust plate and the end face flange and between the blade tip flange and the end face flange; 所述转子组件包括：永磁体和支撑架，所述永磁体嵌在所述支撑架内，所述支撑架与所述定子组件并列设置，且所述支撑架的一端与所述叶梢法兰相连；所述端面法兰的外壁上设有第一轴向耐磨套，所述推力盘的内壁上设有第二轴向耐磨套，所述第二轴向耐磨套与第一轴向耐磨套构成推力轴承副，用于承受螺旋桨的正倒车推力；所述端面法兰的外壁上还设有径向耐磨套，所述径向耐磨套与所述叶梢法兰外圆面构成径向轴承副，用于承受转子组件和螺旋桨的重量和在旋转过程中由于偏心形成的离心力；所述径向轴承副和推力轴承副的表面设有水槽，用于容纳水中泥沙，并通过水流冷却径向轴承副和推力轴承副；The rotor assembly comprises: a permanent magnet and a support frame, wherein the permanent magnet is embedded in the support frame, the support frame is arranged in parallel with the stator assembly, and one end of the support frame is connected to the blade tip flange; a first axial wear-resistant sleeve is provided on the outer wall of the end face flange, and a second axial wear-resistant sleeve is provided on the inner wall of the thrust plate, and the second axial wear-resistant sleeve and the first axial wear-resistant sleeve constitute a thrust bearing pair for bearing the forward and reverse thrust of the propeller; a radial wear-resistant sleeve is also provided on the outer wall of the end face flange, and the radial wear-resistant sleeve and the outer cylindrical surface of the blade tip flange constitute a radial bearing pair for bearing the weight of the rotor assembly and the propeller and the centrifugal force formed due to eccentricity during rotation; water grooves are provided on the surfaces of the radial bearing pair and the thrust bearing pair for accommodating mud and sand in the water, and cooling the radial bearing pair and the thrust bearing pair by water flow; 所述推力轴承副采用成对的、同极相斥的永磁体或电磁线圈，形成磁推力轴承副；所述定子组件为两个，所述转子组件为一个且设置于两个所述定子组件之间。The thrust bearing pair adopts paired permanent magnets or electromagnetic coils with the same polarities repelling each other to form a magnetic thrust bearing pair; there are two stator assemblies, and there is one rotor assembly which is arranged between the two stator assemblies. 2.根据权利要求1所述的环形电力推进器，其特征在于，所述推力轴承副和径向轴承副的耐磨套均为耐腐蚀耐磨损的金属或非金属材质，或高分子材质，或硬质耐磨涂层。2. The annular electric thruster according to claim 1 is characterized in that the wear-resistant sleeves of the thrust bearing pair and the radial bearing pair are made of corrosion-resistant and wear-resistant metal or non-metallic materials, or polymer materials, or hard wear-resistant coatings. 3.根据权利要求1所述的环形电力推进器，其特征在于，所述螺旋桨为整体式螺旋桨或分体式螺旋桨。3. The annular electric propulsion device according to claim 1 is characterized in that the propeller is an integral propeller or a split propeller. 4.根据权利要求1所述的环形电力推进器，其特征在于，所述壳体的两端还分别设有防护罩，用于保护轴向磁通电机和轴承组件。4. The annular electric thruster according to claim 1 is characterized in that protective covers are respectively provided at both ends of the shell to protect the axial flux motor and the bearing assembly. 5.根据权利要求1-4中任一项所述的环形电力推进器，其特征在于，所述定子组件和转子组件均为多个，所述转子组件和定子组件相互交替穿插于所述壳体内。5. The annular electric thruster according to any one of claims 1-4, characterized in that there are multiple stator assemblies and multiple rotor assemblies, and the rotor assemblies and the stator assemblies are alternately inserted into the shell.
CN202010489204.1A 2020-06-02 2020-06-02 A ring-shaped electric propulsor driven by an axial flux motor Active CN111641308B (en)

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CN111641308B true CN111641308B (en) 2025-02-18

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