CN101601181A

CN101601181A - Oil immersion line motor

Info

Publication number: CN101601181A
Application number: CNA2008800003638A
Authority: CN
Inventors: 王新忠; 高云峰; 付晓辉; 王光能; 王国元
Original assignee: Shenzhen Han's Precision Mechatronics Co ltd
Current assignee: Shenzhen Han's Precision Mechatronics Co ltd; Shenzhen Hans Precision Mechatronics Co Ltd
Priority date: 2008-10-30
Filing date: 2008-10-30
Publication date: 2009-12-09
Anticipated expiration: 2028-10-30
Also published as: WO2010048756A1; CN101601181B

Abstract

A kind of oil immersion line motor, a kind of oil immersion line motor comprises that stator (1) reaches the mover (2) of moving linearly in this stator (1), described stator (1) comprises pipe (11) in the stator, be set in the outer stator outer tube (9) of pipe (11) in the described stator and be arranged at described stator outer tube (9) and described stator in save silicon steel ring (15) and coil (14) between the pipe (11) and along the plural number of its axial arranging, it is characterized in that, be filled with solid insulating material between the pipe (11) in described stator outer tube (9) and the described stator.Adopt oil immersion line motor of the present invention, can realize good sealing of stator internal and high-insulativity are guaranteed submersible electric machine with oil normal operation under oil well.

Description

Oil immersion line motor

The present invention relates to a kind of oil immersion line motor for oil immersion line motor technical field, and in particular to a kind of to be used for the oil immersion line motor of oily underground work.Pumping unit known to background technology is mainly girder-like oil pump-oil-well pump device, and complete equipment is divided into the center section on ground, underground and contact ground and underground, but it is all mechanical oil recovery.Because oil mining complicated condition is changeable, with being continuously increased for well depth and yield, this oil pumper weight is big, the shortcoming more than accident becomes apparent from, and its shortcoming is specific as follows：

1st, highly energy-consuming：Tradition machinery is recovered the oil because mechanical structure is very complicated, and motor power factor is very low, general to want between 20%-50%；Again due to there is long sucker rod, every about 1000 meters of sucker rod there are about 2 meters of 0. 6-1. elastic deformation, badly influence system effectiveness when twitching.

2nd, eccentric wear is easily produced：Because the well depth in most oil field is all more than km, generation when sucker rod is rubbed has had a strong impact on the reliability of system.

3rd, not environmentally, noise is big；Because crude oil leaks when at sea recovering the oil, pollution of the crude oil to ocean can be caused.

4th, system complex：System main modular is individually separated, and system coordination is very poor, and inconvenience is controlled together.Because electric energy can be converted into straight reciprocating motion without intermediate transmission structure by oil immersion line motor, either still underground is transformed oil pumper on well, transmission mechanism bulk is advantageously reduced, raising machine adopts efficiency, and its advantage is specific as follows：

1st, few energy is saved：Oil immersion line motor is mainly that mover is for linear motion in stator, and its structure is very simple, and the relatively conventional system of system effectiveness is high, therefore energy-conservation；Because without long sucker rod, The gear deceleration and walking beam etc., system effectiveness is greatly enhanced；Averagely save up to 50%, save mass energy.

2nd, eccentric wear free：Because without long sucker rod, also just without eccentric wear problem, the reliability of system is greatly enhanced.

3rd, because motor is in underground, so noise is small；Due to not leaking outside when at sea recovering the oil, crude oil pair is not resulted in The pollution of ocean.

4th, simple system, system main modular latent oil oil immersion line motor dresses up one with oil-immersed pump, and system coordination very well, is easy to implement intelligent control.But oil is exploited using oil immersion line motor, there are many requirements to the stator of oil immersion line motor：It is to need to take seal approach, such as the latent oil oil immersion line motor in oily underground work first, its stator interior is unable to the debris such as water leaking-in, oil, the coil component being otherwise powered in stator normal work or even can not make motor damage.Therefore for oil immersion line motor, the sealing property for optimizing its stator is even more important.The content of the invention main object of the present invention is just to provide a kind of good seal performance, avoids there is a possibility that the high oil immersion line motor of leakage, operating efficiency when recovering the oil.To achieve the above object, the present invention uses following technical scheme：A kind of oil immersion line motor, the mover for linear motion including stator and in the stator, the stator includes stator inner tube, the stator outer tube being set in outside the stator inner tube and is arranged between the stator outer tube and the stator inner tube and saves silicon steel ring and coil along the plural number of its axial arranging, characterized in that, being filled with solid insulating material between the stator outer tube and the stator inner tube.Preferably：The insulating materials is epoxy resin.The coil has insulation crust.Also include being arranged at least joint of the stator outer tube and stator inner pipe end, the joint and the stator outer tube and stator inner tube tight fit between three to form annular seal space.Sealing ring is equipped with joint of the joint respectively with stator outer tube and stator inner tube.Annular groove is offered at least one of the side face connected respectively with the stator inner tube and stator outer tube in the joint, the sealing ring is located in the annular groove.The end face of the stator outer tube offers the first screw, and the sidepiece of the joint, which is offered, to be offered corresponding with first screw and connect the first through hole of the deep gouge in deep gouge, the deep gouge. The pad of glue class is provided between the stator outer tube and joint.The connecting part of the connecting part of the outer peripheral face of the joint and stator outer tube and the joint and the inner peripheral surface of stator inner tube at least one be welded into seamless state.Preferably, in addition to the first spacing ring for being arranged between the stator outer tube and stator inner tube, first spacing ring is securedly mounted in the stator inner tube, spacing for being carried out to the silicon steel ring and coil.Preferably, first spacing ring includes the first hoop arc and the second hoop arc that radian sum is slightly less than full circle radian, and the first and second hoop arc fixed engagement is with lock ring in the stator inner tube.Preferably, the sidepiece of the first hoop arc offers the second through hole for connecting its end, the respective end of the second hoop arc offers the second screw, and the second screw paid through second through hole and lock on second screw is affixed by the described first hoop arc and the second hoop arc.Preferably, the mover includes axle, permanent-magnetic clamp, magnetic guiding loop and the second spacing ring, and permanent-magnetic clamp and the magnetic guiding loop array arrangement is on axle, and second spacing ring is fastened and is mounted on an axle, for carrying out axial limiting to the permanent-magnetic clamp on axle and magnetic guiding loop.Preferably, second spacing ring includes the 3rd hoop arc, the 4th hoop arc, the radian of the 3rd hoop arc and the 4th hoop arc and is slightly less than full circle radian, the 3rd hoop arc and the 4th hoop arc fixed engagement with lock ring on the shaft.Preferably, the fourth hole of outside portion and end is communicated with the 3rd hoop arc, the respective end of the 4th hoop arc is provided with the 4th screw, the described 3rd will bind round arc and the 4th through the fourth hole and the 4th screw that is locked on the 4th screw and bind round arc fixed engagement.Preferably, the mover also includes bearing, and the bearing holder (housing, cover) is on axle, and the external diameter of the bearing is bigger than the external diameter of permanent-magnetic clamp, magnetic guiding loop, the second spacing ring.Preferably, the bearing includes plastic bearing and magnetic conduction bearing, and the plastic bearing is enclosed on magnetic conduction bearing outer ring.Preferably, the external diameter of at least one of the magnetic guiding loop, second spacing ring is bigger than the external diameter of permanent-magnetic clamp.Preferably, in addition to clamp nut, the end of the axle is provided with screw thread, and the clamp nut is locked on the screw thread.Preferably, the axle is hollow type. The present invention is beneficial to be had the technical effect that:The oil immersion line motor of the present invention is in oily underground work, and be connected with oil well pump, because the oil immersion line motor of the present invention is filled with solid insulating material between stator outer tube and stator inner tube, ensure that the high-insulativity and sealing effectiveness of stator interior coil component, the entrance of outside oil, water etc. is obstructed, more ensure that positioned at the mover of stator interior make in unobstructive condition above and below move along a straight line, it is ensured that the work of the normal table of oil immersion line motor.Because the oil immersion line motor of the present invention by the positioning inner tube in its stator, position outer tube end is provided with joint, the joint is merged by sealing ring with stator inner tube, stator outer tube close-fitting is collectively forming an airtight chamber with stator inner and outer pipe, further ensure that the sealing property of the element to being arranged between stator inner tube, stator outer tube.Stator produces primary travelling-magnetic-field by silicon steel ring and coil, electromagnetic push is produced with mover interaction, mover moves along a straight line above and below making in stator, and then act on oil well pump, underground crude oil can be continually extracted into oil pick-up tube by oil well pump, and be transported to from oil pick-up tube in ground installation；The stator of this oil immersion line motor is in the case where being fully sealed, the entrance of outside oil, water etc. is obstructed, so as to ensure that the mover positioned at stator interior moves up and down under the conditions of unobstructive, due to the sucker rod without traditional length, system operating efficiency is substantially increased.Illustrate structural representations of the Fig. 1 for the oil immersion line motor of the specific embodiment of the invention；Fig. 2 is the structural representation of the stator of the oil immersion line motor of the specific embodiment of the invention；Fig. 3 is the perspective representation of Fig. 2 center taps part；Fig. 4 is the partial enlargement diagram that Fig. 2 center taps are assembled with stator inner and outer pipe；Fig. 5 is the partial enlargement diagram of one end of stator extraction motor lines in Fig. 2；Fig. 6 is the perspective representation of the first spacing ring in Fig. 2；Fig. 7 is the first of the first spacing ring perspective representation for binding round arc；Fig. 8 is the second of the first spacing ring perspective representation for binding round arc；Fig. 9 is the structural representation of the mover of the specific embodiment of the invention；Figure 10 be Fig. 9 in bearing structural representation. Embodiment to the present invention is described in further details below by specific embodiment and with reference to accompanying drawing.As shown in Figure 1, 2, it is used for the oil immersion line motor of oily underground work the invention mainly relates to a kind of, can be by positioned at the crude oil pump of subsurface to ground, it is (generally primary that this linear electric motors includes stator 1）With make in the stator 1 above and below move along a straight line mover 2 (- as be secondary）.The stator 1 includes stator outer tube 9, stator inner tube 11, multiple silicon steel rings 15 of array arrangement and multiple coils 14 and two ring joints 10, wherein, stator outer tube 9 and stator inner tube 11 can use steel pipe, and the coil 14 is annular.The more piece silicon steel ring 15 and multiple coils 14 of array arrangement are axially set between stator outer tube 9 and the body of stator inner tube 11, and ring set is in stator inner tube 11, and each silicon steel ring 15 and coil 14 are arranged in interlaced form vertically.The coil 14 of array arrangement is arranged in star by three-phase or triangle connects coil.As in Figure 2-4, each joint 10 is arranged at stator outer tube 9, an end of stator inner tube 11, the joint 10 and stator outer tube 9, the tight fit of stator inner tube 11, annular groove 103 is offered on the outer peripheral face that the inner peripheral surface and joint 10 connected in joint 10 with stator inner tube 11 connects with stator outer tube 9, sealing ring 12 is equipped with groove 103, in the present embodiment, the sealing ring 12 is 0 type ring.Due to sealing ring 12 is equipped between stator outer tube 9 and stator inner tube 11 respectively in joint 10, so as to the joint 10 and the stator outer tube 9 and the tight fit of stator inner tube 11 to form annular seal space between three, to obstruct the entrance of the impurity such as outside oil, water, it is ensured that silicon steel ring 15 and the working environment of loop coil 14 in cavity.As shown in figure 4, in a further preferred embodiment, the annular gasket 17 of such as glue class is also equipped between stator outer tube 9 and joint 10, the annular gasket 17 can be by the 3rd screw（It is not shown）Through and be clamped at stator outer tube 9 and joint 10, further ensure that the sealing effectiveness of annular seal space.As shown in Figure 1, in preferred embodiment, by the connecting part 22 of joint 10 and the outer peripheral face of stator outer tube 9, and the connecting part 23 of joint 10 and the outer peripheral face of stator inner tube 11 is welded, become seamless state, it can be using the splendid Laser Welding of weldability or argon arc welding, it would however also be possible to employ other welding manners, also ensure that stator 1 in sealed environment.As Figure 1-5, in preferred embodiment, joint 10 includes different two sections of external diameter, form step, the top 10a of the step, i.e. between the small partial insertion stator inner tube 11 of external diameter and the respective end of stator outer tube 9, the bottom 10b of the step is the respective end of the big part contact stator outer tube 9 of external diameter.It is preferred that being pushed up in stator outer tube 9 by joint 10 The end face supported offers the first screw 91, and the sidepiece of joint 10 offers deep gouge 101, the bottom 10b of the step of joint 10 to should the first screw 91 offer and connect the first through hole 105 of the deep gouge 101, the first screw（It is not shown）Through the first through hole 105 and lock on first screw 91, make to be tightly engaged between stator outer tube 9 and joint 10 by screwed lock clamp force, it is ensured that the sealing property of chamber.As shown in Fig. 2 being reinforced insulation performance and intensity, coil 14 is solidified with high insulating cement class or Plastic, forms the shell of high intensity and high insulating property.Such as high insulating cement of filling or plastics solid insulating material 29 are filled out between stator outer tube 9 and stator inner tube 11, the insulating materials 29 is epoxy resin, and it covers coil 14 and silicon steel ring 15 after shaping.To the schematic indication indicated only a position of insulating materials 29 in figure, actually insulating materials is filled between stator outer tube 9 and stator inner tube 11 everywhere.Because the oil immersion line motor of the present invention is filled with solid insulating material 29 between stator outer tube 9 and stator inner tube 11, the schematic diagram of insulating materials 29 is simply simply illustrated in Fig. 2, insulating materials is filled between stator outer tube 9 and stator inner tube 11 in fact, it is merely not only a part for Fig. 2 signals, ensure that the high-insulativity and sealing effectiveness of stator interior coil component, outside oil is further obstructed, the entrance of water etc., more ensure that positioned at the mover of stator interior make in unobstructive condition above and below move along a straight line, ensure the normal table work of oil immersion line motor.As shown in Fig. 2 in order that outside control system（It is not shown）It can be moved by the controlled motor of extraction cable 20 of this oil immersion line motor, wire hole 106 is provided with a joint 10, motor spiral lead-out wire 18 is drawn from the wire hole 106.The wire hole 106 can be opened up vertically.The connection end 21 of motor spiral lead-out wire 18 and motor extraction cable 20 is arranged in wire hole 106, preferably by the connection end screw or adhesive curing in wire hole 106, so that it is guaranteed that the sealing of terminal strength and junction.As shown in Fig. 2 the connection control system of connector portions 201 of motor extraction cable 20.Also line outlet groove can be provided with a joint 10, motor spiral lead-out wire 18 is drawn from the line outlet groove.As shown in Fig. 2 the internal thread 102 set in ring joint 10, locked screw 13, can so strengthen motor body intensity thereon.As shown in Figure 1, in preferred embodiment, in foregoing airtight chamber in addition to silicon steel ring 15 and coil 14, also include multiple first spacing rings 16 being securedly mounted in stator inner tube 11, first spacing ring 16 plays the role of positioning to the arrangement of silicon steel ring 15 and coil 14 on the axial direction of stator inner tube 11, ensure the arrangement requirement of stator excitation element, while can ensure that every section of slot pitch, namely the silicon steel ring 15 of stator 1 spacing.First spacing ring 16 can use steel loop, and in such cases, the first spacing ring 16 also assists in the magnetic circuit of stator.Preferably, the first spacing ring 16 is respectively provided with every predetermined distance, and first spacing ring 16, each side of first spacing ring 16 is also respectively set in the position close to two joints 10 Immediately silicon steel ring 15 or coil 14 are movable to limit its in portion.As shown in figs 6-8, further, the first spacing ring 16 is the crimp being made up of the first hoop arc 16a and the second hoop arc 16b, and the first hoop arc 16a and the second radian sum for binding round arc 16b are slightly less than the radian of full circle.It is preferred that the first hoop arc 16a and the second hoop arc 16b are generally in semi-annular shape.Wherein, the second through hole 162 of its outside portion and end is communicated with the first hoop arc 16a, second hoop arc 16b respective end offers the second screw 163, second screw is through the second through hole 162 and is locked on the second screw 163, to be fixedly connected with the hoop arcs of the first hoop arc 16a and second 16b.So, i.e., the first hoop arc 16a, second are bound round in stator inner tube 11 by arc 16b lock rings by screwed lock clamp force.In a further embodiment, the first spacing ring 16 can also be other structures, be such as made up of the round projection in stator inner tube 11.To ensure mechanical strength, stator inner tube 11 uses thin wall-type steel pipe.Constituted in addition, stator inner tube 11 both can be the long tube of integration or connected by the segmentation of many short tubes.As shown in figure 9, the mover 2, including axle 25, permanent-magnetic clamp 4, magnetic guiding loop 5, the second spacing ring 7.Permanent-magnetic clamp 4 and magnetic guiding loop 5 array is arranged on axle 25.Second spacing ring 7 is fixed on axle 25, for carrying out axial limiting to the permanent-magnetic clamp 4 on axle 25 and magnetic guiding loop 5.Second spacing ring 7 can be such that permanent-magnetic clamp 4 and magnetic guiding loop 5 is maintained on original design position, it is to avoid permanent-magnetic clamp 4 and magnetic guiding loop 5 move the polar moment change caused, so as to ensure the normal work of mover.And then maintenance to mover, detection are avoided, save expense.The axle 25 can be steel pipe, and the magnetic guiding loop 5 can be steel loop, and the material of second spacing ring 7 is alternatively steel.The number of the permanent-magnetic clamp 4 and magnetic guiding loop 5 determines typically have multiple according to the width of the length of axle 25, permanent-magnetic clamp 4 and magnetic guiding loop 5.As shown in Fig. 9,10, in one embodiment, the mover 2 also includes bearing 6, and the bearing 6 is enclosed on axle 25.The external diameter of the bearing 6 is bigger than the external diameter of permanent-magnetic clamp 4, magnetic guiding loop 5, the second spacing ring 7, plays a part of protection permanent-magnetic clamp 4, magnetic guiding loop 5, the second spacing ring 7.As shown in Fig. 2 the bearing 6 includes plastic bearing 61 and magnetic conduction bearing 62, the plastic bearing 61 is enclosed on the outer ring of magnetic conduction bearing 62.The plastic bearing 61 is made up of high molecular abrasion-proof material, to reduce coefficient of friction.The magnetic conduction bearing 62 can hold for steel shaft.(structure of the second spacing ring 7 is identical with the structure of the first spacing ring 16 for second spacing ring 7, refer to Fig. 6-8) include binding round the crimp that arc 72 is constituted by the 3rd hoop arc the 71, the 4th, the 3rd hoop arc 71 and the 4th binds round the radian of arc 72 and is slightly less than full circle radian, and the 3rd hoop arc 71 and the 4th hoop fixed engagement of arc 72 is with lock ring on the axle 25.In one embodiment, the 3rd hoop hoop of arc the 71, the 4th arc 72 is generally in semi-annular shape.The fourth hole 73 of outside portion and end is communicated with the 3rd hoop arc 71, the respective end of the 4th hoop arc 72 is provided with the 4th screw 74, the 4th screw（It is not shown）Through the fourth hole 73 and it is locked at the 4th screw 73 On with by the described 3rd hoop arc 71 and the 4th hoop the fixed engagement of arc 72.Certainly, as needed, user can be designed that three or more hoop arcs constitute a complete spacing ring.As long as these bind round the radian of arcs and are slightly less than full circle radian.In a further embodiment, second spacing ring 7 can also be other structures, be such as made up of the round projection on moving axis.As shown in figure 9, in one embodiment, the external diameter of at least one of the magnetic guiding loop 5, second spacing ring 7 is more bigger than the external diameter of permanent-magnetic clamp 4.So; after the abrasion of bearing 6; it is as shown in Figure 9 that at least one of spacing ring 7 of magnetic guiding loop 5 and second can provide protection for permanent-magnetic clamp 4; in certain embodiments; the mover 2 also includes clamp nut 8; the moving axis end is provided with screw thread 3, and the clamp nut is locked on the screw thread 3.Clamp nut can guarantee that the coupling mechanism force of permanent-magnetic clamp 4 on axle 25, magnetic guiding loop 5, the second spacing ring 7 and bearing 6.If as shown in figure 9, the number of permanent-magnetic clamp 4 and magnetic guiding loop 5 is a lot, then second spacing ring 7 can be set multiple, and each second spacing ring 7 is uniformly discretely fixed on axle 25.I.e. on the axle 25, one the second spacing ring 7 is just set every predetermined distance, and axial limiting to permanent-magnetic clamp 4 and magnetic guiding loop 5 is further enhanced being also provided with the first spacing ring 16 at clamp nut 8.As shown in figure 9, the moving axis is hollow type, so as to play a part of enhancing intensity, latent oil breathing or directly as a part for oil circuit.The screw thread 3 can be additionally used in the assembly for plunger for linking oil well pump.Internal thread 102 on the joint 10 can be additionally used in the pump barrel assembly for linking oil well pump.As shown in figure 1, the operation principle of above-mentioned oil immersion line motor is as follows：Because the oil immersion line motor of the present invention is connected in oily underground work, and with oil well pump.The present invention is provided with joint by the positioning inner tube in its stator, position outer tube end, the joint is merged by sealing ring with stator inner tube, stator outer tube close-fitting is collectively forming an airtight chamber with stator inner and outer pipe, it is ensured that to the silicon steel ring and the sealing property of coil being arranged between stator inner tube, stator outer tube.After the coil 14 of coil 14 of stator 1 leads to three-phase electricity, coil 14, silicon steel annulus 15 of arrangement is coordinated with it to produce stator travelling-magnetic-field, mechanical energy is converted electromagnetic energy into the interaction of mover 2, producing thrust makes mover 2 be moved up and down in stator 1.So as to drive oil well pump to move up and down, underground crude oil can be continually extracted into oil pick-up tube by oil well pump, and be transported to from oil pick-up tube in ground installation.The present invention Oil immersion line motor can make stator keep be fully sealed, the entrance of outside oil, water etc. is obstructed, so as to ensure that the mover positioned at stator interior moves up and down under the conditions of unobstructive, due to the sucker rod without traditional length, system operating efficiency is substantially increased.The oil immersion line motor of the present invention is filled with solid insulating material between stator outer tube and stator inner tube, ensures that the high-insulativity of stator interior coil component, it is ensured that the normal table work of oil immersion line motor.Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert that the specific implementation of the present invention is confined to these explanations.For example, the stator of the present invention not only can as oil immersion line motor stator, can also be that what other any required coiler parts in stator carried out sealed linear electric motors is filled with insulating materials stator.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, protection scope of the present invention should be all considered as belonging to.

Claims

Claims

1. a kind of oil immersion line motor, including stator（1) and in the stator（1) mover for linear motion in（2), the stator（1) stator inner tube is included（11), it is set in the stator inner tube（11) stator outer tube outside（9) and it is arranged at the stator outer tube（9) with the stator inner tube（11) silicon steel ring is saved between and along the plural number of its axial arranging（And coil 15)（14), it is characterised in that the stator outer tube（9) with the stator inner tube（11) solid insulating material is filled between.

2. oil immersion line motor as claimed in claim 1, it is characterised in that the insulating materials is epoxy resin.

3. oil immersion line motor as claimed in claim 1, it is characterised in that the coil（14) there is insulation crust.

4. oil immersion line motor as claimed in claim 1, it is characterised in that also including being arranged at the stator outer tube (9) and stator inner tube（11) an at least joint for end（10), the joint（10) with the stator outer tube（9) with stator inner tube（11) tight fit between three to form annular seal space.

5. oil immersion line motor as claimed in claim 4, it is characterised in that in the joint（10) respectively with stator outer tube（9) with stator inner tube（11) joint is equipped with sealing ring（12).

6. oil immersion line motor as claimed in claim 5, it is characterised in that in the joint（10) respectively with the stator inner tube（And stator outer tube 11)（9) annular groove is offered at least one of the side face connected（103), the sealing ring（12) it is located at the annular groove（103) in.

7. oil immersion line motor as claimed in claim 4, it is characterised in that the end face of the stator outer tube offers the first screw（91), the joint（10) sidepiece offers deep gouge（101), offered in the deep gouge and first screw（91) correspond to and connect the deep gouge（101) first through hole（105).

8. oil immersion line motor as claimed in claim 4, it is characterised in that the stator outer tube（9) pad of glue class is provided between joint（17).

9. oil immersion line motor as claimed in claim 4, it is characterised in that the joint（10) with the connecting part of the outer peripheral face of stator outer tube (9)（And the joint 22)（10) with stator inner tube（11) connecting part of inner peripheral surface（23) at least one is welded into seamless state.

10. oil immersion line motor according to claim 1, it is characterised in that：Also include being arranged at the stator outer tube（9) with stator inner tube（11) the first spacing ring between（16), first spacing ring（16) fastening peace Mounted in the stator inner tube（11) on, for the silicon steel ring（And coil 15)（14) carry out spacing.

11. oil immersion line motor according to claim 10, it is characterised in that：First spacing ring（16) the first hoop arc that radian sum is slightly less than full circle radian is included（16a) with the second hoop arc（16b), the first and second hoop arc（16a, 16b) fixed engagement with lock ring in the stator inner tube（11) on.

12. oil immersion line motor according to claim 9, it is characterised in that：The first hoop arc（Sidepiece 16a) offers the second through hole for connecting its end（162), the second hoop arc（Respective end 16b) offers the second screw（163), through second through hole（162) and lock pay in second screw（163) the second screw on binds round arc by described first（16a) with the second hoop arc（It is 16b) affixed.

13. according to any described oil immersion line motors of claim 1-12, the mover（2) axle is included（25), permanent-magnetic clamp（4), magnetic guiding loop（5) with the second spacing ring（7), the permanent-magnetic clamp（And magnetic guiding loop 4)（5) array arrangement is in axle（25) on, second spacing ring（7) fasten and be arranged on axle（25) on, for axle（25) permanent-magnetic clamp on（And magnetic guiding loop 4)（5) axial limiting is carried out.

14. oil immersion line motor according to claim 12, it is characterised in that：Second spacing ring（7) the 3rd hoop arc is included（71), the 4th hoop arc（72), the 3rd hoop arc（71) with the 4th hoop arc（72) radian and it is slightly less than full circle radian, the 3rd hoop arc（71) with the 4th hoop arc（72) fixed engagement with lock ring in the axle

(25) on.

15. oil immersion line motor according to claim 14, it is characterised in that：The 3rd hoop arc（71) fourth hole of outside portion and end is communicated with（73), the 4th hoop arc（72) respective end is provided with the 4th screw（74), through the fourth hole（73) and it is locked at the 4th screw（74) the 4th screw on binds round arc by the described 3rd（71) with the 4th hoop arc（72) fixed engagement.

16. oil immersion line motor according to claim 14, it is characterised in that：The mover（2) bearing is also included（6), the bearing（6) it is enclosed on axle（25) on, the bearing（6) external diameter compares permanent-magnetic clamp（4), magnetic guiding loop（5), the second spacing ring（7) external diameter is big.

17. oil immersion line motor according to claim 14, it is characterised in that：The bearing（6) plastic bearing is included（61) with magnetic conduction bearing（62), the plastic bearing（61) it is enclosed on magnetic conduction bearing（62) outer ring.

18. oil immersion line motor according to claim 14, it is characterised in that：The magnetic guiding loop（5), the second spacing ring（At least one of 7) external diameter compares permanent-magnetic clamp（4) external diameter is big.

19. oil immersion line motor according to claim 14, it is characterised in that：Also include clamp nut（8), the axle（25) end is provided with screw thread（3), the clamp nut（8) it is locked at the screw thread（3) on.

20. oil immersion line motor according to claim 14, it is characterised in that：The axle（25) it is hollow type.