CN103158850A

CN103158850A - Ring drive thruster provided with propeller drive module

Info

Publication number: CN103158850A
Application number: CN 201110408322
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 propeller drive module, in particular to the ring drive thruster comprising a ring-shaped shell body, a thruster assembly, a magnetic rotor assembly and a 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 stator assembly comprises a plurality of spaced propeller drive modules. The spaced propeller drive modules are installed on the surface of the inner circumference of the ring-shaped shell body. The propeller drive modules are arranged for providing electromagnetic torque for the magnetic rotor assembly.

Description

Looped drive thruster with screw propeller driver module

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 screw propeller driver module.Described looped drive thruster comprises annular casing, propulsion component, magnet rotor assembly and 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 stator module comprises the screw propeller driver module at a plurality of intervals, and the screw propeller driver module at described interval is installed to the inner circumferential surface of described annular casing.Described screw propeller driver module is configured to provide 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 the screw propeller driver module that comprises a plurality of electromagnetic stator bolts.

Fig. 3 is the sectional view of the looped drive thruster of Fig. 2 of dissecing at section 3-3, shows stator core and the rotor core of a plurality of electromagnetic stator bolts.

Fig. 4 is the substituting stern view of the looped drive thruster of Fig. 1 of dissecing at section 2-2, shows the screw propeller driver module that comprises a plurality of linear drive actuators.

Fig. 5 is the sectional view of the looped drive thruster of Fig. 4 of dissecing at section 5-5, shows rotor core and the stator core of linear drive actuator.

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 center of the flow path from be arranged on housing 20.Like this, hub 24 is minimized for the impact of the hydrodynamic drag in housing 20.Also wish to reduce the hydrodynamic drag of housing 20.RDT 10 of the present invention has adopted the screw propeller driver module in the stator core, and its sub-core interval of rotating between ring 26 and housing 20 is to reduce the cross section of stator core.The screw propeller driver module at interval has formed passage, and it has reduced the hydrodynamic drag that RDT 10 produces.

Fig. 2 is the stern view of the looped drive thruster (RDT) 10 of Fig. 1 of dissecing at section 2-2, shows the stator module and the rotor assembly 32 that comprise screw propeller driver module 30A-30D.Fig. 2 is removed view in situation corresponding to RDT 10 at tail cup 28B.In the embodiment of Fig. 2, screw propeller driver module 30A-30D comprises the electromagnetic stator post.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 and Fig. 5.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.Screw propeller driver module 30A-30D is installed to the inner radial surface of housing 20 and comprises separately ferromagnetic core and coil winding.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.In other embodiments of the invention, four screw propeller driver module 30A-30D shown in replacement can use the screw propeller driver module of other quantity.

Housing 20 around restrict rotor assembly 32 to form clearance G.Clearance G comprises the flowing space, and the water of 10 submergences of RDT or fluid can flow by this flowing space.Like this, in other embodiments, front fairing 28A and tail cup 28B can be omitted in the operating period of RDT 10.The thickness of clearance G, and the thickness of ring 26, rotor assembly 32, screw propeller driver module 30A-30D and housing 20 is not drawn in Fig. 2 in proportion.Thereby screw propeller driver module 30A-30D is installed to the part that the inner circumferential surface of housing 20 occupies the flowing space.Screw propeller driver module 30A-30D is disperseed intermittently or flowing in passage 33A-33D between module with permission water in the flowing space in the interval.As reference Fig. 3 in greater detail, the existence of passage 33A-33D has reduced hydrodynamic drag.

Fig. 3 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, screw propeller driver module 30A, screw propeller driver module 30C, rotor assembly 32 and propulsion component 36A.Propulsion component 36A comprises screw propeller 22, hub 24, ring 26, bearing assembly 34A and 34B, Support bracket 38A-38D, axle 39 and support ring 40A and 40B.Rotor assembly 32 comprises rotor core 42 and permanent magnet 44.Screw

propeller driver module

30A and 30C comprise respectively stator core 50A and 50C and coil winding 52A 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 is coaxially extended the ring 26 that makes propulsion component 36A and is supported on one heart in housing 20 by bearing assembly 34A and 34B along centre line C L.

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.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 screw

propeller driver module

30A and 30C and rotor assembly 32 from housing 20.But, in other embodiments, if can be other local approaching, tail cup 28A can with housing 20 over all Integrations.

Housing 20 is spaced a distance to form clearance G with ring 26, and clearance G has formed flow path, and fluid can flow in this flow path.As Fig. 1 and shown in Figure 5, tail cup 28B can be configured to coverage gap G.Yet, as shown in Figure 3, can flow through formed passage 33A-33D(Fig. 2 between screw propeller driver module 30A-30D thereby tail cup 28B can be configured to allow fluid to flow into clearance G).Water flowing in clearance G provides cooling and reduced hydrodynamic losses to screw propeller driver module 30A-30D.

Support bracket 38A and 38B extend radially inwardly from tail cup 28B, as the crow flies towards support ring 40A and cross clearance G.Support bracket 38A and 38B are included in two (the 3rd invisible in the section of Fig. 3) in three Support brackets that in tail cup 28B, interval 120 is spent.Support bracket 38C and 38D extend radially inwardly from front fairing 28A, as the crow flies towards support ring 40B and cross clearance G.Support bracket 38C and 38D are included in two (the 3rd invisible in the section of Fig. 3) in three Support brackets that in front fairing 28A, interval 120 is spent.In other embodiments, Support bracket 38A-38D is directly from housing 20 rather than fairing 28A and 28B extension.Support bracket 38A-38D is provided for coming with support ring 40A and 40B the structure of pivot shaft 39.Bearing assembly 34A and 34B are assemblied in respectively in support ring 40A and 40B.The relative end of bearing assembly 34A and 34B receiving axes 39.Axle 39 extends from bearing assembly 34A, passes hub 24 and enters bearing assembly 34B.Hub 24 for example assembles around axle 39 with force fit, makes hub 24 and axle 39 as one man rotate.Like this, when screw

propeller driver module

30A and 30C applied moment of torsion to rotor assembly 32, screw propeller 22 was allowed to along with axle 39 rotates in bearing assembly 34A and 34B and rotates around centre line C L.

Screw

propeller driver module

30A and 30C are installed to the surface of radially inwardly facing of housing 20.Particularly, stator core 50A and 50C are attached to housing 20 by any appropriate device.Stator core 50A and 50C comprise ferromagnetic material, and it is made into the form of post or piece, and be outstanding from housing 20.Tangential or circumferentially, stator core 50A and 50C by interval equably, are provided with open space to form passage 33A-33D(Fig. 2 along housing 20 between them).In other embodiments, stator core 50A and 50C distribute unevenly along housing 20.Coil winding 52A and 52C are wound around around the post of stator core 50A and 50C, make described winding form the coil with wire loop, and it extends vertically and tangentially.Coil winding 52A and 52C comprise any suitable conductive material, for example copper.

Rotor assembly 32 is installed to the surface of radially outward facing of ring 26.Particularly, rotor core 42 is attached to ring 26 by any appropriate device.Rotor core 42 comprises ferromagnetic material, and it is made into the form of annular ring, and described annular ring limits ring 26 around.Rotor core 42 is positioned on ring 26 to aim at stator core 50A and 50C.Permanent magnet 44 is installed to the radially-outer surface of rotor core 42 with surperficial installation constitution.In yet another embodiment, ring 26 is omitted from propulsion component 36A, and rotor core 42 is directly mounted to the tip of screw propeller 22.The orientation of the magnetic pole of permanent magnet is along circumferential.

Be so disposed in RDT 10, screw

propeller driver module

30A and 30C and rotor assembly 32 have formed the magnetoelectricity motor.Alternating current is by for example from ship 12(Fig. 1) power supply directly be fed to coil winding 52A and 52C.Electric current in coil winding 52A and 52C causes magnetic flow to flow by stator core 50A and 50C.The magnetic pole of the relative orientation of permanent magnet 44 causes magnetic flow to be advanced by rotor assembly 32, and it is advanced by rotor core 42.The magnetic flow of the magnetic flow of screw

propeller driver module

30A and 30C and permanent magnet 44 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.Discuss as reference Fig. 4 and Fig. 5, RDT 10 can use the screw propeller driver module that is arranged on other structures in housing 20 by other bearing constructions.

Fig. 4 is the substituting stern view of the looped drive thruster (RDT) 10 of Fig. 1 of dissecing at section 2-2, shows the stator module and the rotor assembly 32 that comprise screw propeller driver module 54A and 54B.In the embodiment of Fig. 2, screw

propeller driver module

54A and 54B comprise the linear drive actuator stator.As the situation of the embodiment of Fig. 2, RDT 10 also comprises housing 20, screw propeller 22, hub 24, ring 26,

fairing

28A and 28B(Fig. 1) and rotor assembly 32.Screw

propeller driver module

54A and 54B are installed to the inner radial surface of housing 20 and comprise paired ferromagnetic core and coil winding.Housing 20 around restrict rotor assembly 32 to form clearance G.Clearance G comprises the flowing space, and the water of 10 submergences of RDT or fluid can flow by this flowing space.The thickness of clearance G, and the thickness of ring 26, rotor assembly 32, screw

propeller driver module

54A and 54B and housing 20 is not drawn in Fig. 4 in proportion.Thereby screw

propeller driver module

54A and 54B are installed to the part that the inner circumferential surface of housing 20 occupies the flowing space.Screw

propeller driver module

54A and 54B are disperseed intermittently or flowing in

passage

56A and 56B between module with permission water in the flowing space in the interval.As reference Fig. 5 in greater detail, the existence of

passage

56A and 56B has reduced hydrodynamic drag.In an illustrated embodiment, screw

propeller driver module

54A and 54B are configured to be similar to the primary unit of arc linear motor, and be as be known in the art.

Fig. 5 is the sectional view of the looped drive thruster 10 of Fig. 4 of dissecing at section 5-5, shows bearing assembly 34C and 34D, and it supports the propulsion component 36B at ring 26 places.RDT 10 comprises housing 20, front fairing 28A, tail cup 28B, screw propeller driver module 54A, rotor assembly 32 and propulsion component 36B.Propulsion component 36B comprises screw propeller 22, hub 24, ring 26, bearing assembly 34C and 34D, bearing

gasket

58A and 58B and bearing ring 60A and 60B.Rotor assembly 32 comprises rotor core 42 and permanent magnet 44, and it comprises the described same structure with reference Fig. 3.Like this, for brevity, omit with reference to the discussion of Fig. 5 for rotor assembly 32.Screw propeller driver module 54A comprises stator core 62A and coil winding 64A.

Front fairing 28A comprises the bearing gasket 58B that is positioned at tail end, thereby is positioned near ring 60B.Tail cup 28B comprises the bearing gasket 58A that is positioned at front end, thereby is positioned near ring 60A.Tail cup 28B also comprises guard shield 66, and it extends radially inwardly through bearing assembly 34C and along depending on bearing ring 60A.Guard shield 66 is protected bearing assembly 34C and is provided fluid dynamics surperficial.In other embodiments, guard shield 66 can omit from tail cup 28B, as shown in Figure 3, thereby allow water directly to enter bearing assembly 34C and 34D, screw

propeller driver module

54A and 54B and rotor assembly 32 for use in cooling, and

access passage

56A and 56B are for use in reducing resistance.

Ring 26 is supported by bearing assembly 34C and 34D at

bearing ring

60A and 60B

place.Bearing ring

60A and 60B comprise that respectively front the and tailing axle of ring 26 is to

extension.Bearing ring

60A and 60B can with ring 26 over all Integrations, perhaps bearing ring 60A can be the parts that separate that are secured to ring 26 with

60B.Bearing ring

60A and 60B have increased the usable surface that is not used for support rotor assembly 32 of ring 26.

Bearing ring

60A and 60B axially extend beyond screw propeller driver module 54A, make radially-outer surface respectively facing to front fairing 28A and tail cup 28B.Therefore,

bearing ring

60A and 60B comprise annular ring, and bearing assembly 34C and 34D engage against this annular ring.

Front fairing 28A comprises bearing gasket 58B, and tail cup 28B comprises bearing gasket 58A.Bearing gasket 58B integrally is formed with front fairing 28A, and bearing gasket 58A integrally is formed with tail cup 28B.In other embodiments, bearing gasket 58A can comprise with 58B the parts that separate, and perhaps can form the part of housing 20.In any embodiment, bearing

gasket

58A and 58B comprise annular surface or platform, and bearing assembly 34C and 34D engage against this annular surface or platform.Therefore, bearing assembly 34C and 34D are concentrically positioned between

ring

60A and 60B and

pad

58A and 58B, to allow propulsion component 36B rotation in housing 20 when screw propeller driver module 54A is activated by rotor assembly 32.Particularly, screw propeller driver module 54A applies electromagnetic force to produce screw propeller 22 around the rotation of centre line C L to rotor assembly 32.

The stator core 62A of screw propeller driver module 54A comprises ferromagnetic pellet, and it comprises the arcuate surfaces in the face of rotor assembly 32.A plurality of axial grooves extend to be provided for the space of coil winding along arcuate surfaces.For example, coil winding 64A axially extends along stator core 62A.Therefore, the screw propeller driver module comprises the groove of a plurality of circle spacings and the coil winding that is associated, as shown in Figure 4.Like this, screw propeller driver module 54A and rotor assembly 32 play the function of conventional linear drive actuator, and be as be known in the art.Yet, in the present invention, screw propeller driver module 54A and rotor assembly 32 be crooked or arc to follow the roughly cylindrical profile of housing 20.

Be so disposed in RDT 10, screw propeller driver module 54A and rotor assembly 32 have formed the magnetoelectricity motor of linear actuators form.Alternating current is by for example from ship 12(Fig. 1) power supply directly be fed to coil winding 64A.Electric current in coil winding 64A causes magnetic flow to flow by stator core 62A.The magnetic pole of the relative orientation of permanent magnet 44 causes magnetic flow to be advanced by rotor assembly 32, and it is advanced by rotor core 42.The magnetic flow of screw propeller driver module 54A and the magnetic flow of permanent magnet 44 interact to apply moment of torsion to ring 26.In other embodiments, stator core 62A is non-ferromagnetic, and the interaction of the magnetic flow of the displacement flux of coil winding 64A and rotor assembly 32, and is as be known in the art.Bearing assembly 34C and 34D allow ring 26 and rotor assembly 36B to rotate smoothly around centre line C L.

The structure of RDT 10 and performance benefits are in screw propeller driver module 30A-30D(Fig. 2) and screw

propeller driver module

54A and 54B(Fig. 4).Screw propeller driver module 30A-30D and 54A-54B are easily mounted to housing 20 with the structure of the operation that is conducive to RDT 10.For example, screw propeller driver module 30A-30D and 54A-54B can be manufactured into independent unit or module, and it can be attached to housing 20 subsequently.Each module is identical, has reduced the quantity of parts and the manufacturing cost that is associated.Modular has produced passage 33A-33D(Fig. 2) and

passage

56A and 56B(Fig. 4), it provides the improvement of flow dynamics.For example, screw propeller driver module 30A-30D jointly occupy the flowing space that formed by clearance G less than 50 percent.In the situation that this space does not get clogged, fluid can freely flow between ring 26 and housing 20.In the situation that module 30A-30D and module 54A-54B are installed to housing 20 outsides rather than housing 20 inside, the thickness of housing 20 can be lowered to very thin size, and this has also reduced the flowed friction that is produced by RDT 10.In addition, clearance G is fully large, to such an extent as to can provide corrosion protective layers to module 30A-30D and module 54A-54B in the situation that do not sacrifice magnetic electricity performance.

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

Stator module, described stator module comprise the screw propeller driver module at a plurality of intervals, and the screw propeller driver module at described interval is installed to the inner circumferential surface of described annular casing and is configured to provides electromagnetic torque to described magnet rotor assembly.

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

Described magnet rotor assembly and described annular casing limit the flowing space in described looped drive thruster; And

The screw propeller driver module at described interval forms a plurality of passages in the described flowing space.

3. looped drive thruster as claimed in claim 2, wherein, the screw propeller driver module at described interval occupy the described flowing space less than half.

4. looped drive thruster as claimed in claim 1, wherein, the screw propeller driver module at described interval is around the described inner periphery of described annular casing interval equably.

5. looped drive thruster as claimed in claim 1, wherein, the screw propeller driver module at described interval is around the described inner periphery of described annular casing interval unevenly.

6. looped drive thruster as claimed in claim 1, wherein, the screw propeller driver module at described interval comprises:

A plurality of electromagnets, described a plurality of electromagnets are around the circle spacing of described stator module.

7. looped drive thruster as claimed in claim 2, wherein, each of described electromagnet comprises:

Ferromagnetic stem stem, described ferromagnetic stem stem is outstanding from described annular casing; With

Coil winding, thus described coil winding is wound around vertically and tangential the extension around described ferromagnetic stem stem.

8. looped drive thruster as claimed in claim 1, wherein, the screw propeller driver module at described interval comprises:

A plurality of arc linear actuatorss, described a plurality of arc linear actuatorss are around the circle spacing of described stator module.

9. looped drive thruster as claimed in claim 8, wherein, each of described a plurality of arc linear actuatorss comprises:

Ferromagnetic pellet, described ferromagnetic pellet comprises:

Arcuate surfaces in the face of described rotor assembly; With

Be disposed in a plurality of grooves that extend axially in described arcuate surfaces; With

A plurality of coils that extend axially, described a plurality of coils that extend axially are disposed in described a plurality of extending axially in groove.

10. 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.

11. 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.

12. 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, and wherein, described ring-shaped rotor core and described annular casing limit flow path; With

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

Stator module, described stator module comprises:

The first screw propeller driver module, described the first screw propeller driver module is connected to described annular casing in described flow path; With

The second screw propeller driver module, described the second screw propeller driver module is connected to described annular casing in described flow path, to limit passage between described rear the first and second screw propeller driver modules.

13. looped drive thruster as claimed in claim 12, wherein, the screw propeller driver module at described interval comprises:

14. looped drive thruster as claimed in claim 13, wherein, each of described electromagnet comprises:

15. looped drive thruster as claimed in claim 12, wherein, the screw propeller driver module at described interval comprises:

A plurality of arc linear motors, described a plurality of arc linear motors are around the circle spacing of described stator module.

16. looped drive thruster as claimed in claim 15, wherein, each of described a plurality of arc linear motors comprises:

Ferromagnetic pellet, described ferromagnetic pellet comprises:

Arcuate surfaces in the face of described rotor assembly; With

17. looped drive thruster as claimed in claim 12, wherein, the screw propeller driver module at described interval interval equably in described flow path.

18. looped drive thruster as claimed in claim 12, wherein, the screw propeller driver module at described interval interval unevenly in described flow path.

19. looped drive thruster as claimed in claim 12, wherein, described propulsion component also comprises:

Axle, described axle extends through described hub;

20. looped drive thruster as claimed in claim 12, wherein, described propulsion component also comprises: