CN114050663B - Design method of underground rotary steering energy signal synchronous transmission coupling mechanism - Google Patents
Design method of underground rotary steering energy signal synchronous transmission coupling mechanism Download PDFInfo
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- CN114050663B CN114050663B CN202111274249.8A CN202111274249A CN114050663B CN 114050663 B CN114050663 B CN 114050663B CN 202111274249 A CN202111274249 A CN 202111274249A CN 114050663 B CN114050663 B CN 114050663B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 55
- 230000008878 coupling Effects 0.000 title claims abstract description 40
- 238000010168 coupling process Methods 0.000 title claims abstract description 40
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 24
- 238000013461 design Methods 0.000 title claims abstract description 23
- 238000004804 winding Methods 0.000 claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 abstract description 17
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000004088 simulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
- H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
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- H04B5/263—
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- H04B5/79—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a design method of an energy signal synchronous transmission coupling mechanism for underground rotary steering, and relates to the technical field of electric energy transmission devices for underground rotary steering of oil drilling. According to the invention, the energy coil and the signal coil are connected in series in the same area, so that the problems of large occupied space and high cost of the system can be solved. In order to solve the problem of interference of energy to signals, the invention designs an energy coil and a signal coil, wherein compared with the energy coil, the signal coil has a smaller winding inductance value and is used for signal transmission, and the energy coil has a larger winding inductance value and is used for energy transmission. Under high frequency, the equivalent impedance of the signal transmitting coil is small, the power level is low, the influence on energy transmission can be ignored, and because the signal coil is sparsely wound, the mutual inductance between the energy coil and the signal coil is small, the influence of energy on signal transmission is small, and therefore the interference of energy on signals in the wireless electric energy transmission process can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of electric energy transmission devices for underground rotary steering of oil drilling, in particular to an energy signal synchronous transmission coupling mechanism for underground rotary steering.
Background
The Inductive Coupled Power Transfer (ICPT) technology is a novel energy access technology, and has the characteristics of flexibility, reliability, safety and the like, so that the technology has many successful cases in the industrial field and shows a wide application prospect. However, in many special situations, such as detection control of downhole devices, communication among devices, etc., not only non-contact transmission of electric energy is required, but also real-time transmission of signals is required, which puts great demands on energy and signal transmission devices.
In the process of synchronous transmission of energy and signals in the traditional wireless power transmission, two sets of coils with independent energy and signals are adopted, as shown in fig. 1, but an energy transmission channel and a signal channel of the system respectively occupy one area, so that the system occupies a large space, is high in cost and increases the maintenance difficulty. In order to reduce the interference between the energy transmission channel and the signal transmission channel, an isolation layer needs to be added between the energy transmission channel and the signal transmission channel, so that the size of the coupling mechanism is lengthened, and the system cost is further increased. In addition, the independent dual channels may reduce the flexibility of the system to some extent.
The existing underground wireless power transmission system has a transmission structure adopting the same coil for wireless energy and signal transmission, and as shown in fig. 2, the channel is used as a shared channel, so that certain volume and cost can be saved. However, when energy and signals are transmitted through a shared channel, a problem exists in that the energy interferes with the transmission of the signals in the transmission process, so that the interference of signal transmission is caused, the signal transmission is caused to be problematic, and the normal operation of the device is seriously influenced.
Disclosure of Invention
The invention aims to solve the problems of long coupling mechanism size, increased system cost and reduced system flexibility caused by adopting two sets of independent coils for energy and signals in the prior art, and the problem that the normal operation of the device is seriously influenced because the signal transmission is easily interfered by adopting a transmission structure of the same coil. The coupling mechanism designed by the invention can connect the energy coil and the signal coil in series in the same area, and can solve the problems of large occupied space and high cost of the system. In order to solve the problem of interference of energy on signals, the invention designs an energy coil and a signal coil, wherein compared with the energy coil, the signal coil has a smaller winding inductance value and is used for signal transmission, and the energy coil has a larger winding inductance value and is used for energy transmission. Under high frequency, the equivalent impedance of the signal transmitting coil is small, the power level is low, the influence on energy transmission can be ignored, the signal coil is sparsely wound, the mutual inductance between the energy coil and the signal coil is small, the influence of energy on signal transmission is small, and therefore the interference of energy on signals in the wireless electric energy transmission process can be effectively reduced.
In order to solve the problems in the prior art, the invention is realized by the following technical scheme:
the method comprises the steps that a coupling mechanism designed by the method comprises a transmitting end and a receiving end, wherein the transmitting end comprises an outer cylinder magnetic core, a primary side energy transmitting coil and a primary side signal transmitting coil, and the receiving end comprises an inner cylinder magnetic core, a secondary side energy receiving coil and a secondary side signal receiving coil; the design method specifically comprises the following steps:
sleeving an inner cylinder magnetic core in an outer cylinder magnetic core, and coaxially arranging the inner cylinder magnetic core and the outer cylinder magnetic core;
the primary side signal transmitting coil and the primary side energy transmitting coil are connected in series, and the primary side signal transmitting coil and the primary side energy transmitting coil are wound on the inner wall of the outer cylinder magnetic core along the axial direction of the outer cylinder magnetic core;
the secondary side signal receiving coil and the secondary side energy receiving coil are axially distributed along the inner barrel magnetic core and are wound on the outer wall of the inner barrel magnetic core;
during winding, the primary side signal transmitting coil and the secondary side signal receiving coil are wound by adopting the same structure, and the primary side energy transmitting coil and the secondary side energy receiving coil are wound by adopting the same structure;
when the inner cylinder magnetic core is assembled in the outer cylinder magnetic core, a secondary side signal receiving coil and a secondary side energy receiving coil on the inner cylinder magnetic core are respectively opposite to a primary side signal receiving coil and a primary side energy receiving coil on the outer cylinder magnetic core;
the number of turns of the primary side signal transmitting coil and the secondary side signal receiving coil is reduced or the turn pitch of the primary side signal transmitting coil and the secondary side signal receiving coil is increased, so that energy loss and signal interference caused by energy are reduced.
Furthermore, the primary side signal transmitting coil and the secondary side signal receiving coil are wound by adopting a Q-shaped coil structure.
And winding the primary side energy emission coil and the secondary side energy emission coil by adopting a Q-shaped coil structure.
A groove I for winding a primary side signal transmitting coil and a groove II for winding a primary side energy transmitting coil are formed in the inner wall of the outer cylinder magnetic core; when the primary side signal transmitting coil is wound in the groove I, the outer circumferential surface of the primary side signal transmitting coil does not protrude out of the notch of the groove I; when the primary side energy emitting coil is wound in the groove II, the outer circumferential surface of the primary side energy emitting coil does not protrude out of the notch of the groove II.
A groove III for winding a secondary side signal receiving coil and a groove IV for winding a secondary side energy receiving coil are formed in the outer wall of the inner barrel magnetic core; when the secondary side signal receiving coil is wound in the groove III, the outer circumferential surface of the secondary side signal receiving coil does not protrude out of the notch of the groove III; when the secondary energy receiving coil is wound in the groove IV, the outer circumferential surface of the secondary energy receiving coil does not protrude out of the notch of the groove IV.
Furthermore, when the inner cylinder magnetic core is assembled in the outer cylinder magnetic core, the groove I and the groove III are oppositely arranged, the widths of the groove openings are the same, and the depths of the groove openings are the same; the groove II and the groove IV are oppositely arranged, the widths of the notches of the groove II and the groove IV are the same, and the depth of the groove is the same.
The depths of the groove I, the groove II, the groove III and the groove IV are respectively 5 mm.
The coupling mechanism adopts a coupling topological structure of an SS structure.
Furthermore, an emission shielding layer is arranged at the emission end, and an aluminum shell with the thickness of 10mm is used as the emission shielding layer, namely the aluminum shell of the outer barrel; and ferrite is arranged between the primary side signal transmitting coil and the primary side energy transmitting coil to be used as an isolation shield.
Furthermore, a receiving shielding layer is arranged at the receiving end, namely the receiving shielding layer is an aluminum shell of the inner barrel, and the thickness of the receiving shielding layer is 10 mm; and ferrite is arranged between the secondary side signal receiving coil and the secondary side energy receiving coil to be used as an isolation shield.
The magnetic core is formed by splicing a plurality of magnetic core blocks together.
The winding directions of the primary side energy transmitting coil and the primary side signal transmitting coil are consistent, and whether the current directions are consistent or not is judged.
The primary side energy transmitting coil is wound by litz wires; a primary side signal transmitting coil is wound by litz wires; the secondary side energy receiving coil is wound by a litz wire; and the secondary side signal receiving coil is wound by litz wires.
The number of winding turns of the primary side energy transmitting coil is 15; the number of winding turns of the primary side signal transmitting coil is 5; the number of winding turns of the secondary side energy receiving coil is 15; the winding number of the secondary side signal receiving coil is 5.
The air gap between the inner cylinder magnetic core and the outer cylinder magnetic core is controlled within the range of 20 mm.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the main effect of the invention is twofold. In a first aspect: the invention adopts a wireless power transmission mode to transmit power, greatly reduces equipment damage caused by device abrasion, ignition and the like in an underground drilling environment, and reduces the maintenance cost of the system. In a second aspect: the invention adopts the coupling model of winding double coils on the transmitting side to transmit energy and signals respectively, and connects the energy coil and the signal coil in series in the same block area, thus solving the problems of large occupied space, high cost and interference of energy to signals in the transmission process.
2. Energy and signals are synchronously transmitted in series, so that the system volume and the cost are reduced, but the transmission of the energy can influence the transmission of the signals, and in order to solve the problem of interference of the energy on the signals, an energy coil and a signal coil are designed, compared with the energy coil, the signal coil is slightly smaller in winding inductance value and is used for signal transmission, and compared with the signal coil, the signal coil is larger in winding inductance value and is used for energy transmission. Under high frequency, the equivalent impedance of the signal transmitting coil is small, the power level is low, the influence on energy transmission can be ignored, the signal coil is sparsely wound, the mutual inductance between the energy coil and the signal coil is small, the influence of energy on signal transmission is small, and therefore the interference of energy on signals in the wireless electric energy transmission process can be effectively reduced.
3. The energy coil and the signal coil are connected in series in the same area, so that the problems of large occupied space and high cost of the system can be solved.
Drawings
FIG. 1 is a block diagram of a two-set coil energy signal transmission system in the prior art;
FIG. 2 is a block diagram of a prior art system for transmitting energy signals by using a common set of coils;
FIG. 3 is a block diagram of a synchronous transmission coupling structure of energy signals with two coils connected in series according to the present invention;
FIG. 4 is a circuit diagram of the synchronous transmission device for energy signals according to the present invention;
FIG. 5 is a schematic structural diagram of an inner barrel core according to the present invention;
FIG. 6 is a schematic structural diagram of the outer cylinder magnetic core according to the present invention;
FIG. 7 is a schematic top view of a coupling mechanism according to the present invention;
FIG. 8 is a diagram of a simulation model of a coupling mechanism designed in accordance with the present invention;
reference numerals: 1. the device comprises an outer cylinder magnetic core, a primary side signal transmitting coil 2, a primary side energy transmitting coil 3, an inner cylinder magnetic core 4, an auxiliary side signal receiving coil 5 and an auxiliary side energy receiving coil 6.
Detailed Description
The technical scheme of the invention is further elaborated in the following by combining the drawings in the specification. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
As a preferred embodiment of the present invention, referring to the accompanying drawings of the specification, fig. 3, fig. 5, fig. 6, and fig. 7, the present embodiment discloses a method for designing a downhole rotation-oriented energy signal synchronous transmission coupling mechanism, the coupling mechanism designed by the method includes a transmitting end and a receiving end, the transmitting end includes an outer cylinder magnetic core, a primary side energy transmitting coil, and a primary side signal transmitting coil, and the receiving end includes an inner cylinder magnetic core, a secondary side energy receiving coil, and a secondary side signal receiving coil; the design method specifically comprises the following steps: sleeving an inner cylinder magnetic core in an outer cylinder magnetic core, and coaxially arranging the inner cylinder magnetic core and the outer cylinder magnetic core; the primary side signal transmitting coil and the primary side energy transmitting coil are connected in series, and the primary side signal transmitting coil and the primary side energy transmitting coil are wound on the inner wall of the outer cylinder magnetic core along the axial direction of the outer cylinder magnetic core; distributing the secondary side signal receiving coil and the secondary side energy receiving coil along the axial direction of the inner cylinder magnetic core and winding the secondary side signal receiving coil and the secondary side energy receiving coil on the outer wall of the inner cylinder magnetic core; during winding, the primary side signal transmitting coil and the secondary side signal receiving coil are wound by adopting the same structure, and the primary side energy transmitting coil and the secondary side energy receiving coil are wound by adopting the same structure; when the inner cylinder magnetic core is assembled in the outer cylinder magnetic core, a secondary side signal receiving coil and a secondary side energy receiving coil on the inner cylinder magnetic core are respectively opposite to a primary side signal receiving coil and a primary side energy receiving coil on the outer cylinder magnetic core; the number of turns of the primary side signal transmitting coil and the secondary side signal receiving coil is reduced or the turn pitch of the primary side signal transmitting coil and the secondary side signal receiving coil is increased, so that energy loss and signal interference caused by energy are reduced.
In this embodiment, as shown in fig. 3, the secondary energy-receiving coil is connected to an independent energy-receiving circuit, and the secondary signal-receiving coil is connected to an independent signal-receiving circuit.
Example 2
Referring to fig. 3 and 4 for the description of the preferred embodiment of the present invention, as shown in fig. 4, a specific circuit block diagram of energy transmission is disclosed, which mainly comprises an input power source, an inverter circuit, a coupling mechanism, a compensation network, a rectifying and filtering circuit, and a load.
In FIG. 4 Uin is the DC power input, MOSFET S 1 ~S 4 Form a full bridge inverter circuit, C P And L P Compensating the network for the transmitting end, C S And L S Compensating the network for the receiving end, where L P And L S Respectively a primary side energy transmitting coil and a secondary side energy receiving coil, M is mutual inductance between the coils, L 1 And L 2 A primary side signal transmitting coil, a secondary side signal receiving coil and a diode D 1 ~D 4 Forming a rectifying circuit, C is a filter capacitor, R L Is a load. The coil receiving and transmitting winding structure is shown in fig. 5 and 6, wherein the signal coil and the energy coil are coaxially wound, and the assembly diagram is shown in fig. 7.
The improved single-coil energy signal simultaneous transmission device of the embodiment connects the energy coil and the signal coil in series in the same area, so that the problems of large occupied space and high cost of the system can be solved. In order to reduce the interference of energy to signals in the synchronous transmission process of energy signals, a coupling model with a transmitting side wound with double coils connected in series is provided, as shown in fig. 3.
Energy and signals are synchronously transmitted in series, so that the system volume and the cost are reduced, but the transmission of the energy can influence the transmission of the signals, and in order to solve the problem of interference of the energy on the signals, an energy coil and a signal coil are designed, compared with the energy coil, the signal coil is smaller in wound inductance value and is used for signal transmission, and the energy coil is larger in wound inductance value than the signal coil and is used for energy transmission. Under high frequency, the equivalent impedance of the signal transmitting coil is small, the power level is low, the influence on energy transmission can be ignored, and because the signal coil is sparsely wound, the mutual inductance between the energy coil and the signal coil is small, the influence of energy on signal transmission is small, and therefore the interference of energy on signals in the wireless electric energy transmission process can be effectively reduced.
Example 3
As another preferred embodiment of the present invention, referring to the accompanying drawings of the specification 5, 6 and 7, this embodiment discloses a method for designing a downhole rotation-oriented energy signal synchronous transmission coupling mechanism, the coupling mechanism designed by the method includes a transmitting end and a receiving end, the transmitting end includes an outer cylinder magnetic core, a primary side energy transmitting coil and a primary side signal transmitting coil, and the receiving end includes an inner cylinder magnetic core, a secondary side energy receiving coil and a secondary side signal receiving coil; the design method specifically comprises the following steps:
sleeving an inner cylinder magnetic core in an outer cylinder magnetic core, and coaxially arranging the inner cylinder magnetic core and the outer cylinder magnetic core;
the primary side signal emission coil and the primary side energy emission coil are connected in series, and the primary side signal emission coil and the primary side energy emission coil are axially distributed and wound on the inner wall of the outer cylinder magnetic core along the outer cylinder magnetic core;
distributing the secondary side signal receiving coil and the secondary side energy receiving coil along the axial direction of the inner cylinder magnetic core and winding the secondary side signal receiving coil and the secondary side energy receiving coil on the outer wall of the inner cylinder magnetic core;
during winding, the primary side signal transmitting coil and the secondary side signal receiving coil are wound by adopting the same structure, and the primary side energy transmitting coil and the secondary side energy receiving coil are wound by adopting the same structure;
when the inner cylinder magnetic core is assembled in the outer cylinder magnetic core, a secondary side signal receiving coil and a secondary side energy receiving coil on the inner cylinder magnetic core are respectively opposite to a primary side signal receiving coil and a primary side energy receiving coil on the outer cylinder magnetic core;
the number of turns of the primary side signal transmitting coil and the secondary side signal receiving coil is reduced or the turn pitch of the primary side signal transmitting coil and the secondary side signal receiving coil is increased, so that energy loss and signal interference caused by energy are reduced.
Furthermore, the primary side signal transmitting coil and the secondary side signal receiving coil are wound by adopting a Q-shaped coil structure.
And winding the primary side energy transmitting coil and the secondary side energy transmitting coil by adopting a Q-shaped coil structure.
A groove I for winding a primary side signal transmitting coil and a groove II for winding a primary side energy transmitting coil are formed in the inner wall of the outer cylinder magnetic core; when the primary side signal transmitting coil is wound in the groove I, the outer circumferential surface of the primary side signal transmitting coil does not protrude out of the notch of the groove I; when the primary side energy emitting coil is wound in the groove II, the outer circumferential surface of the primary side energy emitting coil does not protrude out of the notch of the groove II.
A groove III for winding a secondary side signal receiving coil and a groove IV for winding a secondary side energy receiving coil are formed in the outer wall of the inner barrel magnetic core; when the secondary side signal receiving coil is wound in the groove III, the outer circumferential surface of the secondary side signal receiving coil does not protrude out of the notch of the groove III; when the secondary energy receiving coil is wound in the groove IV, the outer circumferential surface of the secondary energy receiving coil does not protrude out of the notch of the groove IV.
Furthermore, when the inner cylinder magnetic core is assembled in the outer cylinder magnetic core, the groove I and the groove III are oppositely arranged, the widths of the groove openings are the same, and the depths of the groove openings are the same; the groove II and the groove IV are oppositely arranged, the widths of the notches of the groove II and the groove IV are the same, and the depth of the groove is the same.
The depths of the groove I, the groove II, the groove III and the groove IV are respectively 5 mm.
The coupling mechanism adopts a coupling topological structure of an SS structure.
Furthermore, an emission shielding layer is arranged at the emission end, and an aluminum shell with the thickness of 10mm is used as the emission shielding layer, namely the aluminum shell of the outer barrel; and ferrite is arranged between the primary side signal transmitting coil and the primary side energy transmitting coil to be used as an isolation shield.
Furthermore, a receiving shielding layer is arranged at the receiving end, the receiving shielding layer is an aluminum shell of the inner barrel, and the thickness of the receiving shielding layer is 10 mm; and ferrite is arranged between the secondary side signal receiving coil and the secondary side energy receiving coil to be used as an isolation shield.
The magnetic core structure is characterized in that a hollow cylindrical outer barrel magnetic core and a hollow cylindrical inner barrel magnetic core are adopted, and the outer barrel magnetic core and the inner barrel magnetic core are formed by splicing a plurality of magnetic core blocks.
The winding directions of the primary side energy transmitting coil and the primary side signal transmitting coil are consistent, and whether the current directions are consistent or not is judged.
The primary side energy transmitting coil is wound by litz wires; a primary side signal transmitting coil is wound by a litz wire; the secondary side energy receiving coil is wound by a litz wire; and the secondary side signal receiving coil is wound by litz wires.
The number of winding turns of the primary side energy transmitting coil is 15; the number of winding turns of the primary side signal transmitting coil is 5; the number of winding turns of the secondary side energy receiving coil is 15; the winding number of the secondary side signal receiving coil is 5.
The air gap between the inner cylinder magnetic core and the outer cylinder magnetic core is controlled within the range of 20 mm.
Example 4
As another preferred embodiment of the present invention, referring to fig. 8 in the specification, this embodiment is a simulation model diagram of a coupling mechanism designed by using the design method of embodiment 3, and mainly includes an inner cylinder magnetic core, an outer cylinder magnetic core, a primary side signal transmitting coil, a primary side energy transmitting coil, a secondary side signal receiving coil, and a secondary side energy receiving coil.
The model is built in the multi-physics simulation software comsol, and the simulation data and structure are shown in the following table 1.
Table 1 shows simulation data
Through software simulation, the excitation current of the energy transmitting coil is set to be 1A, and the magnetic flux condition of the energy transmitting end can be obtained. As shown in fig. 8, when energy is transferred from the energy emitting side, due to the constraint of the magnetic core, the winding size of the coil, and the shielding effect of the shielding body, the magnetic flux on the energy emitting side is constrained in the energy emitting area and does not affect signal emission.
Claims (15)
1. The method comprises the steps that a coupling mechanism designed by the method comprises a transmitting end and a receiving end, wherein the transmitting end comprises an outer cylinder magnetic core, a primary side energy transmitting coil and a primary side signal transmitting coil, and the receiving end comprises an inner cylinder magnetic core, a secondary side energy receiving coil and a secondary side signal receiving coil; the method is characterized by comprising the following steps:
sleeving an inner cylinder magnetic core in an outer cylinder magnetic core, and coaxially arranging the inner cylinder magnetic core and the outer cylinder magnetic core;
the primary side signal emission coil and the primary side energy emission coil are connected in series, and the primary side signal emission coil and the primary side energy emission coil are axially distributed and wound on the inner wall of the outer cylinder magnetic core along the outer cylinder magnetic core;
distributing the secondary side signal receiving coil and the secondary side energy receiving coil along the axial direction of the inner cylinder magnetic core and winding the secondary side signal receiving coil and the secondary side energy receiving coil on the outer wall of the inner cylinder magnetic core;
during winding, the primary side signal transmitting coil and the secondary side signal receiving coil are wound by adopting the same structure, and the primary side energy transmitting coil and the secondary side energy receiving coil are wound by adopting the same structure;
when the inner cylinder magnetic core is assembled in the outer cylinder magnetic core, a secondary side signal receiving coil and a secondary side energy receiving coil on the inner cylinder magnetic core are respectively opposite to a primary side signal receiving coil and a primary side energy receiving coil on the outer cylinder magnetic core;
the number of turns of the primary side signal transmitting coil and the secondary side signal receiving coil is reduced or the turn pitch of the primary side signal transmitting coil and the secondary side signal receiving coil is increased, so that energy loss and signal interference caused by energy are reduced.
2. The design method of the downhole rotationally-steered energy signal synchronous transmission coupling mechanism as claimed in claim 1, wherein: and winding the primary side signal transmitting coil and the secondary side signal receiving coil by adopting a Q-type coil structure.
3. The design method of the downhole rotation-oriented energy signal synchronous transmission coupling mechanism as claimed in claim 1 or 2, characterized in that: and winding the primary side energy emission coil and the secondary side energy emission coil by adopting a Q-shaped coil structure.
4. The design method of the downhole rotary steerable energy signal synchronous transmission coupling mechanism according to claim 1, characterized in that: a groove I for winding a primary side signal transmitting coil and a groove II for winding a primary side energy transmitting coil are formed in the inner wall of the outer cylinder magnetic core; when the primary side signal transmitting coil is wound in the groove I, the outer circumferential surface of the primary side signal transmitting coil does not protrude out of the notch of the groove I; when the primary side energy emitting coil is wound in the groove II, the outer circumferential surface of the primary side energy emitting coil does not protrude out of the notch of the groove II.
5. The design method of the downhole rotary steerable energy signal synchronous transmission coupling mechanism according to claim 4, characterized in that: a groove III for winding a secondary side signal receiving coil and a groove IV for winding a secondary side energy receiving coil are formed in the outer wall of the inner barrel magnetic core; when the secondary side signal receiving coil is wound in the groove III, the outer circumferential surface of the secondary side signal receiving coil does not protrude out of the notch of the groove III; when the secondary energy receiving coil is wound in the groove IV, the outer circumferential surface of the secondary energy receiving coil does not protrude out of the notch of the groove IV.
6. The design method of the downhole rotary steerable energy signal synchronous transmission coupling mechanism of claim 5, characterized in that: when the inner cylinder magnetic core is assembled in the outer cylinder magnetic core, the groove I and the groove III are oppositely arranged, the widths of the groove openings are the same, and the groove depths are the same; the groove II and the groove IV are oppositely arranged, the widths of the notches of the groove II and the groove IV are the same, and the groove depths are the same.
7. The design method of the downhole rotationally-steered energy signal synchronous transmission coupling mechanism as claimed in claim 5 or 6, wherein: the depths of the groove I, the groove II, the groove III and the groove IV are respectively 5 mm.
8. The design method of the downhole rotationally-steered energy signal synchronous transmission coupling mechanism as claimed in claim 1, 2, 4, 5 or 6, wherein: the coupling mechanism adopts a coupling topological structure of an SS structure.
9. The design method of the downhole rotation-oriented energy signal synchronous transmission coupling mechanism as claimed in claim 1, 2, 4, 5 or 6, characterized in that: arranging an emission shielding layer at an emission end, and taking an aluminum shell with the thickness of 10mm as the emission shielding layer, namely the aluminum shell of the outer barrel; and ferrite is arranged between the primary side signal transmitting coil and the primary side energy transmitting coil to be used as an isolation shield.
10. The design method of the downhole rotationally-steered energy signal synchronous transmission coupling mechanism as claimed in claim 9, wherein: a receiving shielding layer is arranged at a receiving end, the receiving shielding layer is an aluminum shell of the inner barrel, and the thickness of the receiving shielding layer is 10 mm; and ferrite is arranged between the secondary side signal receiving coil and the secondary side energy receiving coil to be used as an isolation shield.
11. The design method of the downhole rotationally-steered energy signal synchronous transmission coupling mechanism as claimed in claim 1, 2, 4, 5, 6 or 10, wherein: the magnetic core is formed by splicing a plurality of magnetic core blocks together.
12. The design method of the downhole rotation-oriented energy signal synchronous transmission coupling mechanism according to claim 1, 2, 4, 5, 6 or 10, characterized in that: the winding directions of the primary side energy transmitting coil and the primary side signal transmitting coil are consistent, and whether the current directions are consistent or not is judged.
13. The design method of the downhole rotationally-steered energy signal synchronous transmission coupling mechanism as claimed in claim 1, 2, 4, 5, 6 or 10, wherein: the primary side energy transmitting coil is wound by litz wires; a primary side signal transmitting coil is wound by a litz wire; the secondary side energy receiving coil is wound by a litz wire; and the secondary side signal receiving coil is wound by a litz wire.
14. The design method of the downhole rotation-oriented energy signal synchronous transmission coupling mechanism according to claim 1, 2, 4, 5, 6 or 10, characterized in that: the number of winding turns of the primary side energy transmitting coil is 15; the number of winding turns of the primary side signal transmitting coil is 5; the number of winding turns of the secondary side energy receiving coil is 15; the winding number of the secondary side signal receiving coil is 5.
15. The design method of the downhole rotationally-steered energy signal synchronous transmission coupling mechanism as claimed in claim 1, 2, 4, 5, 6 or 10, wherein: the air gap between the inner cylinder magnetic core and the outer cylinder magnetic core is controlled within the range of 20 mm.
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