CN103158847A

CN103158847A - Ring drive thruster provided with transverse flux motor

Info

Publication number: CN103158847A
Application number: CN 201110408207
Authority: CN
Inventors: J.F.吉拉斯; G.I.罗斯曼
Original assignee: Hamilton Sundstrand Corp
Current assignee: Hamilton Sundstrand Corp
Priority date: 2011-12-09
Filing date: 2011-12-09
Publication date: 2013-06-19

Abstract

The invention relates to a ring drive thruster provided with a transverse flux motor, in particular to the ring drive thruster comprising a ring-shaped shell body, a thruster assembly, a magnetic rotor assembly and a transverse flux stator assembly, wherein the ring-shaped shell body limits a flowing route extending along the axis, the thruster assembly is supported in the ring-shaped shell body and comprises a plurality of propeller vanes radially extending from the axis of the flowing route, and the propeller vanes are arranged to revolve around the axis. The magnetic rotor assembly is installed at the radial outer ends of the propeller vanes. The transverse flux stator assembly is installed in the ring-shaped shell body and arranged for providing electromagnetic torque for the magnetic rotor assembly.

Description

Looped drive thruster with cross flux motor

Technical field

Relate generally to of the present invention is used for the looped drive thruster (RDT) of the propulsion system of ship etc.More specifically, the present invention relates to permanent magnet brushless motor for RDT.

Background technology

In the looped drive thruster, the electromagnetic motor over all Integration has the propeller blade propelling unit.In typical RDT, rotor assembly is by the outer diameter end place of over all Integration at propeller blade, and stator module by over all Integration in the static annular casing of propeller blade.Stator module causes the rotor assembly rotation and produces propelling property thrust with propeller blade with electromagnetic mode.Housing is connected to ship by pylon (pylon), and this pylon rotates around vertical axis and makes RDT propelling can be provided in the mode of individual unit and turn to.

RDT is favourable for the submergence operation, because electromagnetic motor is removed from angle of rake center.In this structure, thereby the electric activating part of stator module is positioned in housing and is easily insulated.And motor is positioned to make and minimizes flowed friction.Particularly, stator module is positioned in annular casing, and rotor assembly is positioned next-door neighbour's housing, is positioned at the overall diameter place of blade.Yet stator and rotor assembly still are exposed to flowed friction when being submerged.Therefore, wish to reduce the thickness of rotor and stator module with the loss of further minimum stream body dynamics.

Typical RDT adopts conventional trough of belt stator core in stator module.Yet, in these designs, being difficult to a plurality of windings are contained in narrow and shallow groove, described narrow and shallow groove is required to realize favourable gauge.Propose to comprise the good spiral winding stator of use non-groove stator winding core laminations for reducing the another kind of stator core thickness.This stator module design is expensive, is difficult to make and be only applicable to miniature motor.Therefore, need a kind of permanent magnet motor structure, it can easily and in the cheap structure of making be had favourable flowed friction character.

Summary of the invention

The present invention relates to have the looped drive thruster of cross flux motor.Described looped drive thruster comprises annular casing, propulsion component, magnet rotor assembly and cross flux stator module.Described annular casing limits the flow path along Axis Extension.Described propulsion component is supported in described annular casing and comprises a plurality of propeller blades that radially extend from the described axis of described flow path, and described propeller blade is configured to around described axis rotation.Described magnet rotor assembly is installed to the radial outer end of described propeller blade.Described cross flux stator module is installed to described annular casing and is configured to provides electromagnetic torque to described magnet rotor assembly.

Description of drawings

Fig. 1 is the transparent view of looped drive thruster (RDT) that is connected to the hull of waterborne vessel.

Fig. 2 is the stern view of the looped drive thruster of Fig. 1 of dissecing at section 2-2, shows rotor core and stator core.

Fig. 3 A is the sectional view of the looped drive thruster of Fig. 2 of dissecing at section 3-3, shows by the propulsion component of ring bearings.

Fig. 3 B is the substituting sectional view of the looped drive thruster of Fig. 2 of dissecing at section 3-3, shows the propulsion component that is supported by axle bearing.

Fig. 4 is the fragmentary, perspective view of rotor assembly and the stator module of Fig. 1-3B.

Fig. 5 A is the sectional view of the first embodiment of the stator module of Fig. 4 of dissecing at section 5-5, shows the stator core, and this stator core comprises the U-shaped core that is formed by lamination and yoke.

Fig. 5 B is the sectional view of the second embodiment of the stator module of Fig. 4 of dissecing at section 5-5, shows the stator core, and this stator core comprises the U-shaped core.

Fig. 5 C is the cutaway view of Fig. 5 B of dissecing at section 5B-5B, shows the lamination layer of U-shaped core.

The specific embodiment

Fig. 1 is the transparent view of looped drive thruster (RDT) 10 that is connected to the stern of waterborne vessel 12.Waterborne vessel 12 can comprise the ship of any routine, for example Floating boat or underwater submarine.In an illustrated embodiment, ship 12 comprises hull, and this hull has transom 14 and keel 16.In operation, ship 12 is located so that keel 16 are submerged and transom 14 partly is immersed in water or in any other fluid, thus submergence RDT 10 fully.RDT 10 by pylon 18 on the quarter the afterbody of the following and keel 16 of floor 14 be installed to the hull of ship 12.RDT 10 comprises housing 20, screw propeller 22, hub 24, ring 26 and front, tail cup 28A and 28B.The motor screw propeller (IMP) that RDT 10 also can be known as integrated.

RDT 10 provides propelling property power by the rotation of screw propeller 22 to ship 12.RDT 10 in keel 16 back around pylon 18 rotations so that ship 12 turn to.RDT 10 under the effect of the external power supply that for example provides in the ship 12 in pylon 18 rotations.Over all Integration makes screw propeller 22 rotations to the electromagnetic motor in ring 26 and housing 20.The stator core is installed in housing 20 and by pylon 18 and receives electric power from ship 12.Magnetive attraction from the stator core is passed to the rotor core that is arranged on ring 26.Ring 26 drives rotation on the hub 24 of screw propeller in housing 20.Front fairing 28A and tail cup 28B provide the fluid dynamics protection for housing 20, ring 26, stator core and rotor core.

RDT 10 provides the fluid dynamics advantage for ship 12, because electromagnetic motor is removed by the flow path from be arranged on housing 20.Like this, hub 24 is minimized for the impact of hydrodynamic drag, and the length of screw propeller 22 increased, and improves thus thrust and generates.The operating characteristic of RDT 10 depends on the electromagnetic performance of motor structure.For example, need large a. g. between stator and rotor core in order to corrosion guard is provided.In any case, also wish to have large diameter of motor with respect to the radial wall thickness of stator core so that better electromagnetic torque transmission to be provided, for example by increasing the quantity of rotor magnetic pole.In addition, wish to have radially thin stator and rotor core to reduce the flowed friction of RDT 10.RDT 10 of the present invention has adopted the cross flux permanent magnet motor to realize thin stator core, and it is easy to make and transmits the essence moment of torsion to the stator core on large gap.

Fig. 2 is the stern view of the looped drive thruster (RDT) 10 of Fig. 1 of dissecing at section 2-2, shows stator module 30 and rotor assembly 32.Fig. 2 is removed view in situation corresponding to RDT 10 at tail cup 28B.RDT 10 also comprises housing 20, screw propeller 22, hub 24 and ring 26.Housing 20 axially extends to be formed for the flow path of the water that driven by screw propeller 22 along centre line C L.Ring 26 is supported in housing 20 with various structures by bearing, discusses as reference Fig. 3 A and Fig. 3 B.Thereby hub 24 is supported in ring 26 coaxial with centre line C L by screw propeller 22.Screw propeller 22 radially extends across flow path from hub 24 and arrives ring 26.Screw propeller 22 comprises hydrofoil or blade, and it is shaped as water is accelerated, and is as be known in the art.Ring 26 comprises continuous support ring, and this continuous support ring integrally is installed to the most advanced and sophisticated of screw propeller 22 or outermost portion radially.Rotor assembly 32 is attached to the radially-outer surface of ring 26 and comprises array and the ferromagnetic core that permanent magnet pole is right.Stator module 30 is installed to the inner radial surface of housing 20 and comprises array and the coil winding of ferromagnetic core.Front fairing 28A and fairing 28B(Fig. 1) be connected respectively to front end and the tail end of housing 20, to cover housing 20, stator module 30, rotor assembly 32 and ring 26.

Stator module 30 is installed into to make and leaves the little distance of rotor assembly 32 so that clearance G to be provided.The thickness of clearance G, and the thickness of ring 26, rotor assembly 32, stator module 30 and housing 20 is not drawn in Fig. 2 in proportion.Particularly, wish to make clearance G minimize to improve electromagnetic performance.Yet, must provide clearance G to allow the encapsulation of stator module 30 and rotor assembly 32, so that anticorrosive and waterproof.As reference Fig. 3 A-5 in greater detail, stator module 30 of the present invention and rotor assembly 32 are configured to brushless permanent magnet cross flux motor.

Fig. 3 A is the sectional view of the looped drive thruster 10 of Fig. 2 of dissecing at section 3-3, shows

bearing assembly

34A and 34B, and it supports the propulsion component 36A at ring 26 places.RDT 10 comprises pylon 18, housing 20, front fairing 28A, tail cup 28B,

stator module

30A, 30B and 30C,

rotor assembly

32A, 32B and 32C and propulsion component 36A.Propulsion component 36A comprises screw propeller 22, hub 24, ring 26,

bearing assembly

34A and 34B, bearing

gasket

38A and 38B and bearing ring 40A and

40B.Rotor assembly

32A, 32B and 32C comprise respectively

rotor core

42A, 42B and 42C,

permanent magnet

44A, 44B and 44C,

permanent magnet

46A, 46B and 46C and

space

48A, 48B and

48C.Stator module

30A, 30B and 30C comprise respectively

stator core

50A, 50B and 50C and coil winding 52A, 52B and 52C.

Annular casing 20 is connected to ship 12(Fig. 1 by pylon 18).Pylon 18 is around vertical axis VA rotation, and this causes RDT 10 to adjust the yaw angle of ship 12 when screw propeller 22 rotation.Annular casing 20 defines the cylindricality flow path, and centre line C L is extended to ground by the mobile approach axes of this cylindricality.Screw propeller 22 radially extends between hub 24 and ring 26 about centre line C L.The center of hub 24 coaxially extend along centre line C L the ring 26 that makes propulsion component 36A by

bearing assembly

34A and 34B(when being mounted respectively on bearing

gasket

38A and 38B) be supported on one heart in housing 20.

Front fairing 28A and tail cup 28B are connected to housing 20 to provide fluid dynamics surperficial to RDT 10.Front fairing 28A uses any suitable attachment arrangement (for example fastener) to be connected to housing 20 at front end.Alternatively, front fairing 28A can with housing 20 over all Integrations.Front fairing 28A is shaped as and guides smoothly water to flow on RDT 10, and allows simultaneously water to enter housing 20 to engage propulsion component 36A.Front fairing 28A comprises the bearing gasket 38B that is positioned at tail end, thereby is positioned near ring 26.Tail cup 28A uses any suitable attachment arrangement (for example fastener) to be connected to housing 20 at tail end.Tail cup 28A can remove so that can be near stator module 30A-30C and rotor assembly 32A-32C from housing 20.But, in other embodiments, if can be other local approaching, tail cup 28A can with housing 20 over all Integrations.Tail cup 28B comprises the bearing gasket 38A that is positioned at front end, thereby is positioned near ring 26.Tail cup 28B also comprises guard shield 54, and it extends radially inwardly through bearing assembly 34A and along depending on bearing ring 40A.Guard shield 54 is protected bearing assembly 34A and is provided fluid dynamics surperficial.In other embodiments, guard shield 54 can omit from tail cup 28B, and (this will be discussed below) as shown in Figure 3 directly enters

bearing assembly

34A and 34B, stator module 30A-30C and rotor assembly 32A-32C for use in cooling to allow water.

Ring 26 is supported by

bearing assembly

34A and 34B at

bearing ring

40A and 40B

place.Bearing ring

40A and 40B comprise that respectively front the and tailing axle of ring 26 is to extension.Bearing ring 40A and 4B can with ring 26 over all Integrations, perhaps bearing ring 40A can be the parts that separate that are secured to ring 26 with

40B.Bearing ring

40A and 40B have increased the usable surface that is not used for support rotor assembly 32A-32C of ring 26.

Bearing ring

40A and 40B axially extend beyond respectively

stator module

30C and 30A, make radially-outer surface respectively facing to front fairing 28A and tail cup 28B.Therefore,

bearing ring

40A and 40B comprise annular ring, and

bearing assembly

34A and 34B engage against this annular ring.

Front fairing 28A comprises bearing gasket 38B, and tail cup 28B comprises bearing gasket 38A.Bearing gasket 38B integrally is formed with front fairing 28A, and bearing gasket 38A integrally is formed with tail cup 28B.In other embodiments, bearing gasket 38A can comprise with 38B the parts that separate, and perhaps can form the part of housing 20.In any embodiment, bearing

gasket

38A and 38B comprise annular surface or platform, and

bearing assembly

34A and 34B engage against this annular surface or platform.Therefore,

bearing assembly

34A and 34B are concentrically positioned between

ring

40A and 40B and

pad

38A and 38B, to allow propulsion component 36A rotation in housing 20 when rotor assembly 32A-32C is activated by stator module 30A-30C.Particularly, stator module 30A-30C applies electromagnetic force to produce screw propeller 22 around the rotation of centre line C L to rotor assembly 32A-32C.

Stator module 30A-30C is installed to the surface of radially inwardly facing of housing 20.Particularly, stator core 50A-50C is attached to housing 20 by any appropriate device.Stator core 50A-50C comprises ferromagnetic material, and it is made into the form of U-shaped body, and this U-shaped body opening is towards ring 26.Stator core 50A-50C comprises separately with a plurality of U-shaped bodies of atoll texture around the centre line C L interval, as being shown in further detail in Fig. 4.Axially, stator core 50A-50C by interval equably, is equipped with

distance piece

56A and 56B along housing 20 between them.

Distance piece

56A and 56B comprise non-conductive and ring non-magnetic material, and it keeps space 57.Coil winding 52A-52C is arranged in the U-shaped body that is formed by stator core 50A-50C.Coil winding 52A-52C comprises single toroid winding, and it forms a plurality of continuous loops of conductive material.

Rotor assembly 32A-32C is installed to the surface of radially outward facing of ring 26.Particularly, rotor core 42A-42C is attached to ring 26 by any appropriate device.Rotor core 42A-42C comprises ferromagnetic material, and it is made into the form of annular ring, and described annular ring limits ring 26 around.Rotor core 42A-42C along ring 26 equably the interval to aim at stator core 50A-50C.Permanent magnet 44A-44C, permanent magnet 46A-46C and distance piece 48A-48C are respectively installed to the radially-outer surface of rotor core 42A-42C with surperficial installation constitution.In other embodiments, permanent magnet 44A-44C, permanent magnet 46A-46C and distance piece 48A-48C can be installed to bury structure.In yet another embodiment, ring 26 is omitted from propulsion component 36A, and rotor core 42A-42C is directly mounted to the tip of screw propeller 22.As shown in the cutaway view of Fig. 3 A, permanent magnet 44A-44C is installed to the axial forward end of rotor core 42A-42C, and permanent magnet 46A-46C is installed to the axial tail end of rotor core 42A-42C.Yet as shown in Figure 4, permanent magnet 44A-44C has relative magnetic pole orientation and alternately is positioned at its front end and tail end of rotor core 42A-42C separately with permanent magnet 46A-46C.Distance piece 48A-48C comprises non-magnetic material and is arranged in rotor core 42A-42C upper between permanent magnet 44A-44C and permanent magnet 46A-46C, is isolated from each other magnetically to make rotor core 32A-32C.

Rotor assembly 32A-32C and stator module 30A-30C are easily installed with the structure of the operation that is conducive to RDT 10.For example, compare the conventional magnetoelectricity motor with parallel line of flux, in the cross flux motor, the axial length of stator module 30A-30C is shortened.The size of the shortening of stator module 30A-30C allows easily over all

Integration distance piece

56A and 56B, and it scatters stator module 30A-30C along housing 20, to produce space 57.Space 57 allows water or other fluids to come cooling stator module 30A-30C, and RDT 10 is immersed in described water or other fluids.And rotor assembly 32A-32C is maintained at and leaves respectively stator module 32A-32C clearance distance.This clearance distance is suitable for allowing propulsion component 36A rotation and allows to add corrosion protective coating on stator module 30A-30C and rotor assembly 32A-32C.For example, rotor assembly 32A-32C and stator module 30A-30C can be encapsulated in the material of other nonisulated and waterproof of epoxy resin or some.In other embodiments, rotor assembly 32A-32C and stator module 30A-30C can incorporate in constructive elements.For example, stator module 30A-30C can be arranged in housing 20 so that environmental protection to be provided.Clearance distance between rotor assembly 32A-32C and stator module 30A-30C is maintained in as far as possible little, also allows simultaneously rotor core 32A-32C to keep with the high-efficiency electromagnetic of stator core 30A-30C to adapt to encapsulation and interacts.

Be so disposed in RDT 10, stator module 30A-30C and rotor assembly 32A-32C have formed three-phase, unilateral magnetic electric notor.In three-phase motor, alternating current is applied to stator core 52A-52C 120 degree out-phase, and is as be known in the art.In other embodiments, can use other heterogeneous structures, rather than three-phase.In one-sided motor, be applied to each rotor core from the electric current of single stator core.In other embodiments, can use the bilateral motor, wherein, be applied to each rotor core from the electric current of a pair of stator core, one from the outside, and one from the inboard.Alternating current is by for example from ship 12(Fig. 1) power supply directly be fed to coil winding 52A-52C.Can use conventional solid-state, three-phase current converter.Electric current in coil winding 52A-52C causes magnetic flow to flow by stator core 50A-50C.The magnetic pole of the relative orientation of permanent magnet 44A-44C and permanent magnet 46A-46C causes magnetic flow to be advanced by rotor assembly 32A-

32C.Distance piece

56A and 56B isolate respectively the magnetic flow in every couple of permanent magnet 44A-44C and 46A-46C, cause the flux path in rotor core 32A-32C to be advanced by rotor core 42A-42C.The magnetic flow of the magnetic flow of stator core 30A-30C and permanent magnet 44A-44C and permanent magnet 46A-46C interacts to apply moment of torsion to ring 26.

Bearing assembly

34A and 34B allow ring 26 and rotor assembly 36A to rotate smoothly around centre line C L.

Fig. 3 B is the substituting sectional view of the looped drive thruster 10 of Fig. 2 of dissecing at section 3-3, shows bearing

assembly

34C and 34D at the axle 58 thruster for supporting assembly 36B of place.RDT 10 comprises stator module 30A-30C and rotor assembly 32A-32C, and it comprises the described identical structure with reference Fig. 3 A.Like this, for brevity, omit with reference to the discussion of Fig. 3 B for stator module 30A-30C and rotor assembly 32A-32C.RDT 10 also comprises pylon 18, housing 20, screw propeller 22, hub 24, ring 26, front fairing 28A and tail cup 28B, discusses as the propulsion component 36A of reference Fig. 3 A.Propulsion component 36B comprises

Support bracket

60A, 60B, 60C and

60D.Support bracket

60A and 60B extend radially inwardly from tail cup 28B, as the crow flies towards support ring

62A.Support bracket

60A and 60B are included in two (the 3rd invisible in the section of Fig. 3 B) in three Support brackets that in tail cup 28B, interval 120 is spent.Support bracket 60C and 60D extend radially inwardly from front fairing 28A, as the crow flies towards support ring 62B.Support bracket 60C and 60D are included in two (the 3rd invisible in the section of Fig. 3 B) in three Support brackets that in front fairing 28A, interval 120 is spent.In other embodiments, Support bracket 60A-60D is directly from housing 20 rather than fairing 28A and 28B extension.Support bracket 60A-60D is provided for coming with

support ring

62A and 62B the structure of pivot shaft 58.

Bearing assembly

34C and 34D are assemblied in respectively in support ring 62A and 62B.The relative end of

bearing assembly

34C and 34D receiving axes 58.Axle 58 extends from bearing assembly 34C, passes hub 24 and enters bearing assembly 34D.Hub 24 for example assembles around axle 58 with force fit, makes hub 24 and axle 58 as one man rotate.Like this, when stator module 30A-30C applied moment of torsion to rotor assembly 32A-32C, screw propeller 22 was allowed to along with axle 58 rotates in

bearing assembly

34C and 34D and rotates around centre line C L.

Fig. 4 is the fragmentary, perspective view of stator module 30A and the rotor assembly 32A of Fig. 1-3B.Stator module 30A comprises stator core 50A and coil winding 52A.Stator core 50A comprises U-shaped core 64.In the embodiment shown, stator core 50A is comprised of 28 U-shaped cores 64, and four/part of stator module 30A is shown as Fig. 4.Rotor assembly 30A comprises rotor core 42A, distance piece 48A and a plurality of permanent magnet 44A and 46A.As shown in Figure 4, permanent magnet 44A is configured with the magnetic pole orientation that extends radially outwardly, and permanent magnet 46A is configured with the magnetic pole orientation that extends radially inwardly.Permanent magnet 44A and permanent magnet 46A arrange along the front and tail surface of distance piece 48A with the form that replaces, makes the permanent magnet 44A at front surface place and the permanent magnet 46A of tail surface axially align.

When being operable to electrical motor, stator core 30A and rotor core 32A magnetically interact, and cause rotor assembly 30A to rotate around centre line C L.Alternating current is applied to coil winding 52A, and it causes magnetic flow MF to flow through U-shaped core 64.Magnetic flow MF is reverse directions when the electric current alternation that applies.The plane that magnetic flow MF advances and forms by by each U-shaped core 64, and electric current is advanced perpendicular to this plane in coil winding 52A.The magnetic flow MF that inducts in U-shaped core 64 and the magnetic pole orientation of

permanent magnet

44A and 46A interact, thereby produce force vector F.Force vector F is aligned at the direction that is tangential to rotor assembly 32A.Particularly, force vector F is perpendicular to the plane of magnetic flow MF, and this causes moment of torsion to be applied to the remainder of rotor core 42A and

propulsion component

36A or 36B.

The performance benefits of RDT 10 is in the structure of stator module 30A and rotor assembly 32A.The single coil that stator module 30A only need to be provided by coil winding 52A.And the size of stator module 30A can in axial increase, make height to reduce.These structures allow stator module 30A thin diametrically.The thin structure of stator module 30A makes the diameter of RDT 10 increase, and this allows rotor core 42A diameter to increase to comprise permanent magnet 44A and the 46A of greater number.The magnetic pole of the increase quantity that

permanent magnet

44A and 46A bring allows better moment of torsion transmission and other benefits.

Fig. 5 is the sectional view of the second embodiment of the stator module 30A of Fig. 4 of dissecing at section 5-5, shows stator core 50A, and this stator core 50A comprises the U-shaped core 64 that is formed by lamination 66A lamination 66B and yoke 68.Coil winding 52A extends through U-shaped core 64 between lamination 66A and 66B.Yoke 68 is attached to housing 20(Fig. 2) inside face, make U-shaped core 64 openings towards rotor assembly 32A(Fig. 4).Yoke 68 axially extends to the second end from first end, and lamination 66A is attached to the first end place, and lamination 66B is attached to the second

end place.Lamination

66A and 66B radially extend from yoke 68.Lamination 66A has formed arm 70A together, and lamination 66B has formed arm 70B together.Yoke 68, lamination 66A and lamination 66B have formed the U-shaped passage, and this U-shaped passage has formed magnetic-path.U-shaped passage formation planar magnetic loop, when electric current was applied to coil winding 52A, magnetic flow was by this planar magnetic loop flow.Arm 70A, arm 70B and yoke 68 are assembled into together with any suitable method.Encapsulated layer 72 is avoided corroding with protection arm 70A, arm 70B and yoke 68 around the exposed surface of stator core 50A and the impact of the operating environment of RDT 10.

Lamination

66A and 66B radially extend from yoke 68, make them be parallel to magnetic flow MF(Fig. 4 in U-shaped core 64), this has kept cross flux essence of stator

module 30A.Lamination

66A and 66B and yoke 68 are made of ferromagnetic material, for example cobalt alloy, silicon steel, nickel, iron or other

similar materials.Lamination

66A and 66B comprise the thin plate of solid ferromagnetic material, and it can be by easily from the raw MAT'L punching press or cut out, and are easy to make being conducive to.Yoke 68 is made of the solid piece that is machined to suitable shape.Yoke 68 also can by extending vertically (between the first arm 70A and the second arm 70B) and forming at tangential (in the paper plane at Fig. 5) stacking lamination, extend perpendicular to the magnetic flow MF in yoke 68 to avoid lamination.Yoke 68 also can be made of sintered powder.Similarly, in not using the embodiment of lamination,

arm

70A and 70B can be made of sintered powder.Described in more detail in authorizing Giera and transferring U.S. Patent application 2010/0052467 A1 of Hamilton Sundstrand company of Illinois Rockford and be suitable for U-shaped core used in this invention, this patent application is incorporated herein by reference.

Fig. 5 B is the sectional view of the second embodiment of the stator module 30A of Fig. 4 of dissecing at section 5-5, shows stator core 50A, and this stator core 50A comprises U-shaped core 64.Fig. 5 C is the cutaway view of Fig. 5 B of dissecing at section 5B-5B, shows the lamination layer 72A-72F of U-shaped core 64, and Fig. 5 C and Fig. 5 B discuss simultaneously.Stator module 30A also comprises the coil winding 52A that discusses as reference Fig. 5 A.Lamination 72A-72F comprises the U-shaped lamination, and it is installed to housing 20.Lamination 72A-72F comprises a pair of longitudinal extension part separately, and this a pair of longitudinal extension partly connects the horizontal expansion part.Vertical and horizontal part tangentially (in the paper plane of Fig. 5 B) is stacking to form magnetic flux path, and it is similar to arm 70A, the 70B of Fig. 5 A and the magnetic flux path of yoke 68.As previously described embodiment, lamination 72A-72F is made of the ferromagnetic pieces that is easy to be shaped, for example cobalt alloy, silicon steel, nickel, iron or other similar materials.

The cross flux motor provides advantage to the motor screw propeller of looped drive thruster and over all Integration.Particularly, the cross flux motor provides the progressively attenuating of built-in electromagnetic transfer, for example makes and can be converted into by the high frequency received current that gas-turbine engine provides low axle speed.The upper frequency received current allows less motor to have higher power density.Further realize higher power density by the quantity that the permanent magnet pole that is provided by the cross flux machine is provided.The cross flux machine is permissible clearance G(Fig. 2 also) size increase, this allows better sealing and the encapsulation of stator and rotor assembly.The structure of described cross flux machine is simple, only comprises single stator winding and simple rotor core lamination.In addition, each stator and rotor assembly in heterogeneous structure are identical, thus the manufacturing cost that has reduced number of components and be associated.Use the looped drive thruster of cross flux machine can provide from a kilowatt high power stage to the megawatt scope.

Although described the present invention with reference to (one or more) exemplary embodiment, it will be understood to those of skill in the art that in the situation that do not depart from that the scope of the invention can be made various variations and available equivalents substitutes its element.In addition, in the situation that do not depart from essential scope of the present invention, can carry out many modifications to adapt to concrete situation or material under instruction of the present invention.Therefore, the invention is intended to be to be not limited to disclosed (one or more) specific embodiment, the present invention but will comprise falls into all embodiment in the claims scope.

Claims

1. looped drive thruster comprises:

Annular casing, described annular casing limits the flow path along Axis Extension;

Propulsion component, described propulsion component are supported in described annular casing, and described propulsion component comprises a plurality of propeller blades, and described propeller blade radially extends and is configured to around described axis rotation from the described axis of described flow path;

The first magnet rotor assembly, described the first magnet rotor assembly is installed to the radial outer end of described propeller blade; With

The first cross flux stator module, described the first cross flux stator module are installed to described annular casing and are configured to provides electromagnetic torque to described the first magnet rotor assembly.

2. looped drive thruster as claimed in claim 1, wherein:

Described the first cross flux stator module comprises the core assembly with magnetic-path, makes magnetic flow from described axis and along entering described the first cross flux stator module and advance to described the first magnet rotor assembly from described the first cross flux stator module from described the first magnet rotor component rows the plane that described axis radially extends; And

From the electromagnetic force vector of described the first cross flux assembly along perpendicular to the directive effect on described plane on described the first magnet rotor assembly.

3. looped drive thruster as claimed in claim 2, wherein, described core assembly comprises:

A plurality of U-iron magnetic core section, it forms radially to the passage of inner opening to described the first magnet rotor assembly; With

The single coil winding, it extends through described passage and limits around described the first magnet rotor assembly.

4. looped drive thruster as claimed in claim 3, wherein, each of described U-iron magnetic core section comprises:

The yoke of elongation, it is connected to described annular casing and extends to the second end along the direction of described axis from first end;

The first arm, it extends radially inwardly from described first end; With

The second arm, it extends radially inwardly from described the second end.

5. looped drive thruster as claimed in claim 4, wherein, described yoke, described the first arm and described the second arm comprise the assembly of separating component, it is bonded to form the magnetic circuit by described U-iron magnetic core section.

6. looped drive thruster as claimed in claim 4, wherein, described yoke, described the first arm and described the second arm are made of the sintered powder ferromagnetic material.

7. looped drive thruster as claimed in claim 4, wherein, described yoke, described the first arm and described the second arm are made of ferromagnetic laminates.

8. looped drive thruster as claimed in claim 4, wherein, described the first magnet rotor assembly comprises:

The ferromagnetic core of annular, it is connected to described propeller blade; With

A plurality of magnet rotor pole pairs, its outer diameter surface that is installed to the ferromagnetic core of described annular is to face described single coil winding.

9. looped drive thruster as claimed in claim 8, wherein, described a plurality of magnet rotor pole pairs comprise:

The first permanent magnet, it is connected to the ferromagnetic core of described annular, and is relative with the first arm of U-iron magnetic core section and have a magnetic pole orientation that extends radially outwardly;

The second permanent magnet, it is connected to the ferromagnetic core of described annular, and is relative with the second arm of U-iron magnetic core section and have a magnetic pole orientation that extends radially inwardly; With

Distance piece, it is positioned between described the first permanent magnet and described the second permanent magnet.

10. looped drive thruster as claimed in claim 1, wherein, described propulsion component also comprises:

Hub, described propeller blade extends from described hub;

Support ring, described support ring in described annular casing around described propeller blade; With

A plurality of bearings, described bearing support described propulsion component between described support ring and described annular casing.

11. looped drive thruster as claimed in claim 1, wherein, described propulsion component also comprises:

Hub, described propeller blade extends from described hub;

Axle, described axle extends through described hub;

A plurality of Support brackets, described Support bracket extends towards described axle to support described propulsion component from described annular casing; With

A plurality of bearings, described bearing are positioned between described axle and described Support bracket.

12. looped drive thruster as claimed in claim 1 also comprises:

The second and the 3rd magnet rotor assembly, it is installed to the radial outer end of described propeller blade; With

The second and the 3rd cross flux stator module, it is installed to described annular casing;

Wherein, described first, second, and third magnet rotor assembly is aimed at described first, second, and third cross flux stator module respectively, is configured to three cores pair of three-phase electromagnetic motor with formation.

13. looped drive thruster as claimed in claim 12, also comprise be positioned at described core between distance piece to form groove.

14. looped drive thruster as claimed in claim 1 also comprises the first and second corrosion protective coatings, it covers respectively described the first magnet rotor assembly and described the first cross flux stator module.

15. a looped drive thruster comprises:

Annular casing, described annular casing limits axial flow path;

Propulsion component, described propulsion component comprises:

Hub, described hub coaxially is arranged in described annular casing; With

A plurality of propeller blades, described a plurality of propeller blades are from described hub diameter to stretching out;

Rotor assembly, described rotor assembly comprises:

The ring-shaped rotor core, described ring-shaped rotor core is connected to described a plurality of propeller blade; With

A plurality of permanent magnets, described a plurality of permanent magnets are around described ring-shaped rotor core arrangement; With

Stator module, described stator module comprises:

A plurality of ferromagnetic cores, described a plurality of ferromagnetic cores are installed to described annular casing, and described a plurality of permanent magnets have the magnetic flux path that radially extends; With

Single coil winding, described single coil winding tangentially extend through described a plurality of ferromagnetic core perpendicular to described magnetic flux path.

16. looped drive thruster as claimed in claim 15, wherein, each of described ferromagnetic core comprises:

The yoke of elongation, it is connected to described annular casing and axially extends to the second end from first end;

The first arm, it extends radially inwardly from described first end; With

The second arm, it extends radially inwardly from described the second end;

Wherein, the yoke of described elongation, described the first arm and described the second arm form radially to the U-shaped passage of inner opening to described the first magnet rotor assembly, and described magnetic flux path extends along the planar radial that is formed by described the first arm, the second arm and yoke.

17. looped drive thruster as claimed in claim 16, wherein, each of described a plurality of permanent magnets comprises:

The first permanent magnet, it is connected to described ring-shaped rotor core, and is relative with the first arm of ferromagnetic core and have a magnetic pole orientation that extends radially outwardly;

The second permanent magnet, it is connected to described ring-shaped rotor core, and is relative with the second arm of ferromagnetic core and have a magnetic pole orientation that extends radially inwardly; With

18. looped drive thruster as claimed in claim 16, wherein, described yoke, described the first arm and described the second arm are made of the sintered powder ferromagnetic material.

19. looped drive thruster as claimed in claim 16, wherein, described yoke, described the first arm and described the second arm are made of ferromagnetic laminates.

20. looped drive thruster as claimed in claim 15, wherein, described propulsion component also comprises:

21. looped drive thruster as claimed in claim 15, wherein, described propulsion component also comprises:

Axle, described axle extends through described hub;