Rotary valve pulse generating device

Abstract

The invention provides a rotary valve pulse generating device which comprises a driving module and a transmission module connected with the driving module. The magnetic gear reducer comprises an input shaft, a rotating permanent magnet unit arranged on the input shaft in a sleeving mode, a transmission permanent magnet unit arranged on the periphery of the rotating permanent magnet unit in a sleeving mode, a transmission magnetism adjusting unit arranged on the periphery of the transmission permanent magnet unit in a sleeving mode and a fixed permanent magnet unit arranged on the periphery of the transmission magnetism adjusting unit in a sleeving mode. The input shaft further drives the rotating permanent magnet unit to rotate, the rotating permanent magnet unit drives the transmission permanent magnet unit to rotate under the action of magnetic force, the fixed permanent magnet unit is fixed, and the transmission magnetism adjusting unit rotates under the action of magnetic force jointly applied by the transmission permanent magnet unit and the fixed permanent magnet unit. According to the rotary valve pulse generating device, torque transmission in the magnetic gear reducer can be more stable, and the service life of the rotary valve pulse generating device is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of measurement and control while drilling, and in particular to a rotary valve pulse generating device. Background Art

[0002] The rotary valve pulse generator generates pulse signals through the reciprocating rotation and swing of the rotor. It can be used in muds of different densities and under different well conditions. It is suitable for a wide range of mud densities and working conditions, and also has good adaptability to drilling fluid systems and bottom hole conditions. Therefore, the scale of use of rotary valve pulse generators is gradually increasing.

[0003] Due to the strong demand for improving quality, speed, efficiency and production in drilling construction, the rotary valve pulse generator adopts high displacement, high pump pressure and high speed configuration accordingly, which leads to serious mechanical wear between the mechanical transmission gears of the mechanical interlocking gear reducer of the traditional rotary valve pulse generator, which in turn leads to a serious reduction in the stability of the rotary valve pulser under the construction environment, and is prone to failures such as the reduction gear box getting stuck, thereby reducing the reliability of the rotary valve pulser. Summary of the invention

[0004] One object of the present invention is to propose a rotary valve pulse generating device so that there is no mechanical wear between the rotating permanent magnet unit and the transmission permanent magnet unit, between the transmission magnetic adjustment unit and the transmission permanent magnet unit, and between the fixed permanent magnet unit, thereby making the torque transmission inside the magnetic gear reducer smoother, effectively ensuring the safety of the magnetic gear reducer, avoiding the magnetic gear reducer from getting stuck, and increasing the service life of the rotary valve pulse generating device.

[0005] According to the present invention, a rotary valve pulse generating device is provided, comprising: a driving module and a transmission module connected to the driving module, the transmission module comprising a magnetic gear reducer, the magnetic gear reducer comprising an input shaft, a rotating permanent magnet unit sleeved on the input shaft, a transmission permanent magnet unit sleeved on the outer periphery of the rotating permanent magnet unit, a transmission magnetic adjustment unit sleeved on the outer periphery of the transmission permanent magnet unit, and a fixed permanent magnet unit sleeved on the outer periphery of the transmission magnetic adjustment unit, the driving module can drive the input shaft to rotate, the input shaft in turn drives the rotating permanent magnet unit to rotate, the rotating permanent magnet unit drives the transmission permanent magnet unit to rotate through the action of magnetic force, the fixed permanent magnet unit is fixed, and the transmission magnetic adjustment unit rotates under the action of the magnetic force jointly applied by the transmission permanent magnet unit and the fixed permanent magnet unit.

[0006] In a preferred embodiment, the rotating permanent magnet unit includes an inner rotor yoke sleeved on the input shaft and an inner permanent magnet ring sleeved on the outer periphery of the inner rotor yoke.

[0007] In a preferred embodiment, the transmission permanent magnet unit includes the middle inner permanent magnet ring sleeved on the outer circumference of the inner permanent magnet ring, the middle rotor yoke sleeved on the outer circumference of the middle inner permanent magnet ring, and the middle outer permanent magnet ring sleeved on the outer circumference of the middle rotor yoke.

[0008] In a preferred embodiment, the magnetic gear reducer also includes a first end cover, a casing and a second end cover, and the two ends of the casing are respectively connected to the first end cover and the second end cover to form an accommodating space, and the rotating permanent magnet unit, the transmission permanent magnet unit, the transmission magnetic adjustment unit, the fixed permanent magnet unit, and part of the input shaft are all located in the accommodating space, and the fixed permanent magnet unit is fixedly connected to the casing.

[0009] In a preferred embodiment, the magnetic gear reducer also includes an internal magnetic adjustment unit arranged between the middle inner permanent magnetic ring and the inner permanent magnetic ring, the internal magnetic adjustment unit includes a first tray frame sleeved on the outer periphery of the inner permanent magnetic ring and a plurality of first magnetic conductive blocks arranged at intervals along the outer periphery of the first tray frame, and the magnetism of the first magnetic conductive blocks is alternately distributed.

[0010] In a preferred embodiment, the transmission magnetic tuning unit includes a second tray skeleton sleeved on the outer circumference of the middle outer permanent magnet ring and a plurality of second magnetic conductive blocks spaced apart along the outer circumference of the second tray skeleton, and the magnetism of the second magnetic conductive blocks is alternately distributed.

[0011] In a preferred embodiment, the transmission module also includes a magnetic coupling connected to the magnetic gear reducer and a transmission main shaft connected to the magnetic coupling, the magnetic coupling includes an outer magnetic disk and an inner magnetic ring, the outer magnetic disk is connected to the second pallet frame through a connecting rod, the connecting rod drives the outer magnetic disk to rotate together with the transmission magnetic adjustment unit, the outer magnetic disk and the inner magnetic ring can achieve non-contact transmission through magnetic force, and the inner magnetic ring is connected to the transmission main shaft to drive the transmission main shaft to rotate.

[0012] In a preferred embodiment, the transmission main shaft includes a transmission input shaft, an elastic torque limiter and a transmission output shaft, the transmission input shaft is connected to the transmission output shaft through the elastic torque limiter, and the transmission input shaft is connected to the inner magnetic ring.

[0013] In a preferred embodiment, the elastic torque limiter includes a cam body, a groove seat cooperating with the cam body, and a transmission base, the cam body is connected to the transmission input shaft, the transmission base is connected to the transmission output shaft, the cam body and the groove seat are both arranged inside the transmission base, the cam body has a plurality of arc cams along the circumferential direction, and a plane groove is arranged between adjacent arc cams, the groove seat has a plurality of arc grooves along the circumferential direction, and a plane tooth is arranged between adjacent arc grooves, the arc cam is placed in the arc groove, and the plane tooth is placed in the plane groove.

[0014] In a preferred embodiment, the elastic torque limiter also includes a transmission rod and an elastic member arranged inside the transmission base, the transmission base has a transmission groove and a step surface inside, the first end of the transmission rod is fixed on the end surface of the groove seat away from the cam body, the second end of the transmission rod is arranged in the transmission groove, the end surface of the groove seat away from the cam body, the transmission base and the transmission rod form an accommodating space, the elastic member is arranged in the accommodating space, and the first end is connected to the end surface of the groove seat away from the cam body, and the second end is connected to the step surface.

[0015] In a preferred embodiment, a pulse generating module is also included, which includes a stator, a rotor and an auxiliary spring assembly. The transmission output shaft is connected to the rotor to drive the rotor to rotate. The rotor is connected to the auxiliary spring assembly through a crank-connecting rod mechanism. The rotor cooperates with the stator to generate pulses.

[0016] In a preferred embodiment, the auxiliary spring assembly includes a piston cylinder, a bottom elastic part, a top elastic part and a piston, wherein the bottom elastic part, the top elastic part and the piston are all arranged in the piston cylinder, and the piston is connected to the crank-connecting rod mechanism, and the crank-connecting rod mechanism can drive the piston to move in the piston cylinder, and in the movement direction of the piston, the bottom elastic part and the top elastic part are respectively arranged between the piston and the piston cylinder.

[0017] The present invention includes a magnetic gear reducer through a transmission module, the magnetic gear reducer includes an input shaft, a rotating permanent magnet unit sleeved on the input shaft, a transmission permanent magnet unit sleeved on the outer periphery of the rotating permanent magnet unit, a transmission magnetic adjustment unit sleeved on the outer periphery of the transmission permanent magnet unit, and a fixed permanent magnet unit sleeved on the outer periphery of the transmission magnetic adjustment unit, and the driving module can drive the input shaft to rotate, the input shaft further drives the rotating permanent magnet unit to rotate, and the rotating permanent magnet unit drives the transmission permanent magnet unit to rotate through the magnetic force, and the fixed permanent magnet unit is fixed, the transmission magnetic adjustment unit rotates under the magnetic force jointly applied by the transmission permanent magnet unit and the fixed permanent magnet unit, and because the rotating permanent magnet unit is driven by the magnetic force, the rotation of the permanent magnet unit is achieved. The transmission permanent magnet unit is driven by magnetic force, and the transmission magnetic adjustment unit rotates under the magnetic force jointly applied by the transmission permanent magnet unit and the fixed permanent magnet unit. There is no need for physical contact between the rotating permanent magnet unit and the transmission permanent magnet unit, and there is no need for physical contact between the transmission magnetic adjustment unit and the transmission permanent magnet unit and the fixed permanent magnet unit. Therefore, there is no mechanical wear between the rotating permanent magnet unit and the transmission permanent magnet unit, and between the transmission magnetic adjustment unit and the transmission permanent magnet unit and the fixed permanent magnet unit, thereby making the torque transmission inside the magnetic gear reducer more stable, effectively ensuring the safety of the magnetic gear reducer, avoiding the magnetic gear reducer from getting stuck, and increasing the service life of the rotary valve pulse generating device.

[0018] The present invention also includes a transmission rod and an elastic member arranged inside a transmission base through an elastic torque limiter, the transmission base has a transmission groove and a step surface inside, the first end of the transmission rod is fixed on the end surface of the groove seat away from the cam body, the second end of the transmission rod is arranged in the transmission groove, the end surface of the groove seat away from the cam body, the transmission base and the transmission rod form an accommodating space, the elastic member is arranged in the accommodating space and the first end is connected to the end surface of the groove seat away from the cam body, and the second end is connected to the step surface. When the torque transmitted by the input shaft exceeds the set value, the cam body can apply a force in a compression direction to the spring through the groove seat, so that the elastic member is compressed, and the groove seat moves in the compression direction of the elastic member, thereby transferring the fatigue damage of the torque exceeding the set value on the transmission main shaft to the elastic torque limiter, which can reduce the fatigue accumulation of the input shaft and the output shaft, and improve the service life and reliability of the input shaft and the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the rotary valve pulse generating device according to the present invention is schematically shown;

[0020] Figure 2 A schematic diagram of the structure of a transmission module according to the present invention is shown schematically;

[0021] Figure 3 It is a schematic diagram of the axial cross-section structure of the magnetic gear reducer of the present invention;

[0022] Figure 4It is a schematic diagram of the vertical axial cross-section structure of the magnetic gear reducer of the present invention;

[0023] Figure 5 It is a schematic diagram of the axial cross-sectional structure of the outer magnetic disk of the magnetic coupling of the present invention;

[0024] Figure 6 It is a schematic diagram of the outer magnetic disk end surface structure of the magnetic coupling of the present invention;

[0025] Figure 7 It is a schematic diagram of the axial cross-sectional structure of the inner magnetic ring of the magnetic coupling of the present invention;

[0026] Figure 8 It is a schematic diagram of the permanent magnet structure of the outer magnetic disk of the magnetic coupling of the present invention;

[0027] Fig. 9 It is a schematic diagram of the permanent magnet structure of the inner magnetic ring of the magnetic coupling of the present invention;

[0028] Fig.10 is a schematic diagram of the axial cross-sectional structure of the elastic torque limiter of the present invention in a normal state;

[0029] Fig.11 is a schematic diagram of the axial cross-sectional structure of the elastic torque limiter of the present invention in a failed state;

[0030] Fig.12 It is a schematic diagram of the matching structure of the cam body and the groove seat of the elastic torque limiter of the present invention;

[0031] Fig.13 It is a structural schematic diagram of the end surface of the groove seat of the elastic torque limiter of the present invention;

[0032] Fig.14 It is a structural schematic diagram of the end surface of the transmission base of the elastic torque limiter of the present invention;

[0033] Fig.15 It is a structural schematic diagram of the matching end surface of the cam body of the elastic torque limiter of the present invention;

[0034] Fig.16 It is a schematic diagram of the end surface structure of the groove seat matching of the elastic torque limiter of the present invention;

[0035] Fig.17 is a structural schematic diagram of a pulse generating module of the present invention;

[0036] Fig.18 is a schematic structural diagram of the auxiliary spring assembly of the present invention in the initial state of the rotor;

[0037] Fig.19 It is a schematic structural diagram of the auxiliary spring assembly of the present invention when the rotor is in a closed state.

[0038] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn according to the actual scale. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0040] like Figures 1 to 4 As shown, the rotary valve pulse generating device 100 described in the present invention includes: a driving module 1, a transmission module 2 connected to the driving module 1 and a pulse generating module 3 connected to the transmission module 2, the driving module 1 is used to drive the transmission module 2 to move, and the transmission module 2 is used to drive the pulse generating module 3 to move to generate a pressure pulse.

[0041] The transmission module 2 includes a magnetic gear reducer 8, which is used to reduce the rotation speed and increase the torque. The magnetic gear reducer 8 includes an input shaft 13, a rotating permanent magnet unit 24 sleeved on the input shaft 13, a transmission permanent magnet unit 25 sleeved on the outer periphery of the rotating permanent magnet unit 24, a transmission magnetic adjustment unit 20 sleeved on the outer periphery of the transmission permanent magnet unit 25, and a fixed permanent magnet unit 21 sleeved on the outer periphery of the transmission magnetic adjustment unit 20, wherein the rotating permanent magnet unit 24, the transmission permanent magnet unit 25 and the fixed permanent magnet unit 21 can all apply magnetic force, and the transmission magnetic adjustment unit 20 located between the fixed permanent magnet unit 21 and the transmission permanent magnet unit 25 is used to modulate the transmission permanent magnet unit 25 to transmit torque along the rotation direction according to the set transmission ratio.

[0042] The driving module 1 can drive the input shaft 13 to rotate, and the input shaft 13 in turn drives the rotating permanent magnet unit 24 to rotate. The rotating permanent magnet unit 24 drives the transmission permanent magnet unit 25 to rotate through the magnetic force. The fixed permanent magnet unit 21 is fixed, and the transmission magnetic adjustment unit 20 rotates under the magnetic force jointly applied by the transmission permanent magnet unit 25 and the fixed permanent magnet unit 21.

[0043] The present invention includes a magnetic gear reducer 8 through a transmission module 2, the magnetic gear reducer 8 includes an input shaft 13, a rotating permanent magnet unit 24 sleeved on the input shaft 13, a transmission permanent magnet unit 25 sleeved on the outer periphery of the rotating permanent magnet unit 24, a transmission magnetic adjustment unit 20 sleeved on the outer periphery of the transmission permanent magnet unit 25, and a fixed permanent magnet unit 21 sleeved on the outer periphery of the transmission magnetic adjustment unit 20, and a driving module 1 can drive the input shaft to rotate 13, the input shaft 13 drives the rotating permanent magnet unit 24 to rotate, and the rotating permanent magnet unit 24 drives the transmission permanent magnet unit 25 to rotate through the magnetic force, and the fixed permanent magnet unit 21 is fixed, the transmission magnetic adjustment unit 20 rotates under the magnetic force jointly applied by the transmission permanent magnet unit 25 and the fixed permanent magnet unit 21, and due to the rotating permanent magnet unit Element 24 drives the transmission permanent magnet unit 25 through magnetic force, and the transmission magnetic adjustment unit 20 rotates under the magnetic force jointly applied by the transmission permanent magnet unit 25 and the fixed permanent magnet unit 21. There is no need for physical contact between the rotating permanent magnet unit 24 and the transmission permanent magnet unit 25, and there is no need for physical contact between the transmission magnetic adjustment unit 20 and the transmission permanent magnet unit 25 and the fixed permanent magnet unit 21. Therefore, there is no mechanical wear between the rotating permanent magnet unit 24 and the transmission permanent magnet unit 25, and between the transmission magnetic adjustment unit 20 and the transmission permanent magnet unit 25 and the fixed permanent magnet unit 21, so that the torque transmission inside the magnetic gear reducer 8 is smoother, effectively ensuring the safety of the magnetic gear reducer 8, avoiding the magnetic gear reducer 8 from getting stuck, and improving the service life of the rotary valve pulse generating device 100.

[0044] In addition, the rotating permanent magnet unit 24 drives the transmission permanent magnet unit 25 through magnetic force, thereby realizing the first level of torque transmission. The transmission magnetic adjustment unit 20 rotates under the magnetic force jointly applied by the transmission permanent magnet unit 25 and the fixed permanent magnet unit 21, thereby realizing the second level of torque transmission. The present invention can further increase the torque output by the magnetic gear reducer 8 through two-stage torque transmission.

[0045] In one or more embodiments, the rotating permanent magnet unit 24 includes an inner rotor yoke 14 sleeved on the input shaft 13 and an inner permanent magnet ring 15 sleeved on the outer periphery of the inner rotor yoke 14. The inner permanent magnet ring 15 is composed of a pair of "N / S" first permanent magnets 27, and the polarities of adjacent first permanent magnets 27 are opposite, and the first permanent magnets 27 are arranged in an "N / S" alternating array. The inner rotor yoke 14 is made of ferromagnetic material to increase the magnetism of the inner permanent magnet ring 15. Optionally, the inner rotor yoke 14 is configured in a ring shape.

[0046] In one or more embodiments, the transmission permanent magnet unit 25 includes an intermediate inner permanent magnet ring 17 sleeved on the outer periphery of the inner permanent magnet ring 15, an intermediate rotor yoke 18 sleeved on the outer periphery of the intermediate inner permanent magnet ring 17, and an intermediate outer permanent magnet ring 19 sleeved on the outer periphery of the intermediate rotor yoke 18. The intermediate inner permanent magnet ring 17 is composed of a pair of "N / S" second permanent magnets 28, and the polarities of adjacent second permanent magnets 28 are opposite, and the second permanent magnets 28 are arranged in an "N / S" alternating array, and the number of pole pairs of the second permanent magnets 28 of the intermediate inner permanent magnet ring 17 is greater than the number of pole pairs of the first permanent magnets 27 of the inner permanent magnet ring 15. The intermediate outer permanent magnet ring 19 is composed of a pair of "N / S" third permanent magnets 29, and the polarities of adjacent third permanent magnets 29 are opposite, and the third permanent magnets 29 are arranged in an "N / S" alternating array. The intermediate outer permanent magnet ring 19 rotates integrally with the intermediate inner permanent magnet ring 17, and the angular velocities of the two are the same. The intermediate rotor yoke 18 is made of ferromagnetic material and is used to increase the magnetism of the intermediate inner permanent magnet ring 17. Optionally, the intermediate rotor yoke 18 is configured in a ring shape.

[0047] In one or more embodiments, the magnetic gear reducer 8 also includes a first end cover 12, a casing 22 and a second end cover 23. The two ends of the casing 22 are respectively connected to the first end cover 12 and the second end cover 23 to form an accommodating space. The rotating permanent magnet unit 24, the transmission permanent magnet unit 25, the transmission magnetic adjustment unit 20, the fixed permanent magnet unit 21, and part of the input shaft 13 are all located in the accommodating space, and the fixed permanent magnet unit 21 is fixedly connected to the casing 22.

[0048] The fixed permanent magnet unit 21 includes an outer permanent magnet ring, which is composed of paired "N / S" fourth permanent magnets 30, and the polarities of adjacent fourth permanent magnets 30 are opposite. The fourth permanent magnets 30 are arranged in an "N / S" alternating array, and the number of pole pairs of the fourth permanent magnets 30 of the outer permanent magnet ring is greater than the number of pole pairs of the third permanent magnets 29 of the middle outer permanent magnet ring 19.

[0049] In one or more embodiments, the magnetic gear reducer 8 also includes an internal magnetic adjustment unit 16 arranged between the middle inner permanent magnetic ring 17 and the inner permanent magnetic ring 15, which is used to modulate the middle inner permanent magnetic ring 17 to transmit torque according to a set transmission ratio along the rotation direction to improve the transmission efficiency of the middle inner permanent magnetic ring 17. The internal magnetic adjustment unit 16 includes a first tray frame 32 sleeved on the outer periphery of the inner permanent magnetic ring 17 and a plurality of first magnetic conductive blocks 31 spaced along the outer periphery of the first tray frame 32. The magnetism of the first magnetic conductive blocks 31 is alternately distributed, and the first tray frame 32 is made of non-magnetic material. The internal magnetic adjustment unit 16 is constructed in a ring shape, and the internal magnetic adjustment unit 16 is fixedly installed and cannot rotate, so that the middle inner permanent magnetic ring 17 can rotate through the action of magnetic force.

[0050] In one or more embodiments, the transmission magnetic adjustment unit 20 includes a second pallet skeleton 34 sleeved on the outer periphery of the middle outer permanent magnet ring 19 and a plurality of second magnetic conductive blocks 33 spaced along the outer periphery of the second pallet skeleton 34, and the magnetism of the second magnetic conductive blocks 33 is alternately distributed. The second pallet skeleton 34 is made of non-magnetic material. In the present invention, the transmission magnetic adjustment unit 20 rotates under the action of the magnetic force jointly applied by the transmission permanent magnet unit 25 and the fixed permanent magnet unit 21, and the transmission magnetic adjustment unit 20 is made of the second pallet skeleton 34 and the plurality of second magnetic conductive blocks 33 spaced along the outer periphery of the second pallet skeleton 34, so as to facilitate the rotation of the second pallet skeleton 34 to output torque to the outside.

[0051] like Figures 5 to 9 As shown, in one or more embodiments, the transmission module 2 also includes a magnetic coupling 9 connected to the magnetic gear reducer 8 and a transmission main shaft 11 connected to the magnetic coupling 9, and the magnetic coupling 9 includes an outer magnetic disk 35 and an inner magnetic ring 36. The outer magnetic disk 35 is connected to the second tray skeleton 34 through a connecting rod 37, and the connecting rod 37 is arranged at intervals along the outer periphery of the outer magnetic disk 35. Optionally, the connecting rod 37 is perpendicular to the surface of the outer magnetic disk 35. The connecting rod 37 drives the outer magnetic disk 35 and the transmission magnetic adjustment unit 20 to rotate together. The outer magnetic disk 35 and the inner magnetic ring 36 can realize non-contact transmission through magnetic force. The inner magnetic ring 36 is connected to the transmission main shaft 11 to drive the transmission main shaft 11 to rotate, and the inner magnetic ring 36 is encapsulated in the lubricating oil chamber 38. The outer magnetic disk 35 is coaxially arranged with the inner magnetic ring 36 and can drive the inner magnetic ring 36 to rotate at the same speed, and the outer magnetic disk 35 and the inner magnetic ring 36 both adopt a disc structure, which is convenient for axial installation.

[0052] like Figures 10 to 16 As shown, in one or more embodiments, the transmission main shaft 11 includes a transmission input shaft 41, an elastic torque limiter 10 and a transmission output shaft 42, the transmission input shaft 41 is connected to the transmission output shaft 42 through the elastic torque limiter 10, and the transmission input shaft 41 is connected to the inner magnetic ring 36.

[0053] In one or more embodiments, the elastic torque limiter 10 includes a cam body 43, a groove seat 44 cooperating with the cam body 43, and a transmission base 47. The cam body 43 is connected to the transmission input shaft 41, and the transmission base 47 is connected to the transmission output shaft 42. The cam body 43 and the groove seat 44 are both arranged inside the transmission base 47. The cam body 43 has a plurality of arc cams 48 along its circumference, and a plane groove 49 is arranged between adjacent arc cams 48. The groove seat 44 has a plurality of arc grooves 50 along its circumference, and a plane tooth 51 is arranged between adjacent arc grooves 50. The arc cam 48 is arranged in the arc groove 50, and the plane tooth 51 is placed in the plane groove 49. The contact surface cooperation between the arc cam 48 and the arc groove 50 can realize the transmission of bidirectional reciprocating rotation, and the transmission input shaft 41 can realize the transmission of torque when it is in forward or reverse rotation.

[0054] The elastic torque limiter 10 further includes a transmission rod 45 and an elastic member 46 disposed inside a transmission base 47. The transmission base 47 has a transmission groove 52 inside. The first end of the transmission rod 45 is fixed on the end face of the groove seat 44 away from the cam body 43. The second end of the transmission rod 45 is disposed in the transmission groove 52. The cross section of the transmission rod 45 is configured as a hexagon, so that the torque can be smoothly transmitted to the transmission base 47. The transmission base 47 has a step surface inside. The end face of the groove seat 44 away from the cam body 43, the transmission base 47 and the transmission rod 45 form an accommodation space. The elastic member 46 is disposed in the accommodation space. The first end of the elastic member 46 is connected to the end face of the groove seat 44 away from the cam body 43, and the second end of the elastic member 46 is connected to the step face of the transmission base 47. The elastic member 46 may be a spring.

[0055] When the torque transmitted by the input shaft 41 exceeds the set value, the arc cam 48 can apply a compression force to the elastic member 46 through the arc groove 50, so that the elastic member 46 is compressed and the groove seat 44 moves in the compression direction of the elastic member 46, thereby transferring the fatigue damage of the torque exceeding the set value on the transmission main shaft 11 to the elastic torque limiter 10, which can reduce the fatigue accumulation of the input shaft 41 and the output shaft 42 and improve the service life and reliability of the input shaft 41 and the output shaft 42. When the torque transmitted by the input shaft 41 greatly exceeds the set value, the cam body 43 can be disengaged from the groove seat 44, thereby making the torque transmission invalid, thereby avoiding the torque exceeding the set value being directly applied to the transmission main shaft 11, causing the transmission main shaft 11 to be mechanically damaged.

[0056] like Fig.17 As shown, in one or more embodiments, the pulse generating module 3 includes a stator 53, a rotor 54 and an auxiliary spring assembly 55, the transmission output shaft 42 is connected to the rotor 54 to drive the rotor 54 to rotate, the rotor 54 is connected to the auxiliary spring assembly 55 through a crank connecting rod mechanism 61, and the rotor 54 cooperates with the stator 53 to generate pulses. The crank connecting rod mechanism 61 includes a plurality of connecting rods with hinged ends and angled.

[0057] In one or more embodiments, the pulse generating module 3 further includes a valve body housing 56 .

[0058] like Figure 18 to Figure 19As shown, in one or more embodiments, the auxiliary spring assembly 55 includes a piston cylinder 57, a bottom elastic member 58, a top elastic member 59 and a piston 60, wherein the bottom elastic member 58, the top elastic member 59 and the piston 60 are all arranged in the piston cylinder 57, and the piston 60 is connected to a crank connecting rod mechanism 61, and the crank connecting rod mechanism 61 can drive the piston 60 to move in the piston cylinder 57. In the movement direction of the piston 60, the bottom elastic member 58 and the top elastic member 59 are respectively arranged between the piston 60 and the piston cylinder 57, and the piston 60 can compress the bottom elastic member 58 or the top elastic member 59 during the movement in the piston cylinder 57. Both the bottom elastic member 58 and the top elastic member 59 can be springs.

[0059] like Fig.18 As shown, the auxiliary spring assembly 55 is in the initial state of the rotor, the top elastic member 59 is in a compressed state, and the bottom elastic member 58 is in a stretched state. When the rotor 54 starts and begins to rotate toward the rotor closed position, the rotation of the rotor 54 drives the crank-connecting rod mechanism 61 to move, and the piston rod 62 makes a linear motion in the piston cylinder 57. The bottom elastic member 58 gradually changes from a stretched state to a compressed state, and the top elastic member 59 gradually changes from a compressed state to a stretched state. During the resetting process of the rotor 54, that is, during the process of the rotor returning from the closed position to the initial state, the rotation of the rotor 54 drives the crank-connecting rod mechanism 61 to move, and the piston rod 62 makes a linear motion in the piston cylinder 57. The bottom elastic member 58 gradually recovers from a compressed state to a stretched state, and the top elastic member 59 gradually recovers from a stretched state to a compressed state, thereby realizing the auxiliary action of the auxiliary spring assembly 55 during the starting and resetting process of the rotor 54. Specifically, the auxiliary spring assembly 55 can provide the rotor 54 with an auxiliary force to assist its rotation along the rotation direction when the rotor 54 starts, thereby reducing the starting resistance and avoiding excessive starting current caused by excessive starting resistance. At the same time, the auxiliary spring assembly 55 can provide the rotor 54 with an auxiliary force in the opposite direction of its rotation direction before the rotor 54 is completely closed, thereby reducing the impact of the rotor 54 closing in place and improving the stability of the rotor 54 closing. The auxiliary spring assembly 55 can provide the rotor 54 with an auxiliary force to assist its rotation along the rotation direction when the rotor 54 is reset, thereby reducing the starting resistance and avoiding excessive starting current caused by excessive starting resistance. At the same time, the auxiliary spring assembly 55 can provide the rotor 54 with an auxiliary force in the opposite direction of its rotation direction before the rotor 54 is completely reset, thereby reducing the impact of the rotor 54 returning in place and improving the stability of the rotor 54 returning.

[0060] like Figure 1As shown, in one or more embodiments, the driving module 1 includes a driving circuit 4 and a downhole servo motor 5. The driving circuit 4 is connected to the aviation plug 6 at the tail end by a short-section installation method. The aviation plug 6 is used to power the driving unit 1 and transmit the driving signal. The output end of the downhole servo motor 5 is connected to the transmission unit 2 through an elastic coupling 7, thereby being able to drive the transmission unit 2 to move.

[0061] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rotary valve pulse generating device, comprising: A driving module and a transmission module connected to the driving module, The transmission module includes a magnetic gear reducer, which includes an input shaft, a rotating permanent magnet unit sleeved on the input shaft, a transmission permanent magnet unit sleeved on the outer periphery of the rotating permanent magnet unit, a transmission magnetic adjustment unit sleeved on the outer periphery of the transmission permanent magnet unit, and a fixed permanent magnet unit sleeved on the outer periphery of the transmission magnetic adjustment unit. The driving module can drive the input shaft to rotate, and the input shaft in turn drives the rotating permanent magnet unit to rotate. The rotating permanent magnet unit drives the transmission permanent magnet unit to rotate through magnetic force, and the fixed permanent magnet unit is fixed. The transmission magnetic adjustment unit rotates under the action of the magnetic force jointly applied by the transmission permanent magnet unit and the fixed permanent magnet unit.

2. The rotary valve pulse generator according to claim 1, characterized in that: The rotating permanent magnet unit includes an inner rotor yoke sleeved on the input shaft and an inner permanent magnet ring sleeved on the outer periphery of the inner rotor yoke.

3. The rotary valve pulse generator according to claim 2, characterized in that: The transmission permanent magnet unit includes the middle inner permanent magnet ring sleeved on the outer circumference of the inner permanent magnet ring, the middle rotor yoke sleeved on the outer circumference of the middle inner permanent magnet ring, and the middle outer permanent magnet ring sleeved on the outer circumference of the middle rotor yoke.

4. The rotary valve pulse generator according to claim 3, characterized in that: The magnetic gear reducer also includes a first end cover, a casing and a second end cover. The two ends of the casing are respectively connected to the first end cover and the second end cover to form a accommodating space. The rotating permanent magnet unit, the transmission permanent magnet unit, the transmission magnetic adjustment unit, the fixed permanent magnet unit, and part of the input shaft are all located in the accommodating space. The fixed permanent magnet unit is fixedly connected to the casing.

5. The rotary valve pulse generator according to claim 3, characterized in that: The magnetic gear reducer also includes an internal magnetic adjustment unit arranged between the middle inner permanent magnetic ring and the inner permanent magnetic ring, and the internal magnetic adjustment unit includes a first tray frame sleeved on the outer periphery of the inner permanent magnetic ring and a plurality of first magnetic conductive blocks arranged at intervals along the outer periphery of the first tray frame, and the magnetism of the first magnetic conductive blocks is alternately distributed.

6. The rotary valve pulse generator according to claim 3, characterized in that: The transmission magnetic tuning unit comprises a second tray frame sleeved on the outer periphery of the middle outer permanent magnet ring and a plurality of second magnetic conductive blocks spaced apart along the outer periphery of the second tray frame, wherein the magnetism of the second magnetic conductive blocks is alternately distributed.

7. The rotary valve pulse generator according to claim 6, characterized in that: The transmission module also includes a magnetic coupling connected to the magnetic gear reducer and a transmission main shaft connected to the magnetic coupling. The magnetic coupling includes an outer magnetic disk and an inner magnetic ring. The outer magnetic disk is connected to the second pallet frame through a connecting rod. The connecting rod drives the outer magnetic disk to rotate together with the transmission magnetic adjustment unit. The outer magnetic disk and the inner magnetic ring can achieve non-contact transmission through magnetic force. The inner magnetic ring is connected to the transmission main shaft to drive the transmission main shaft to rotate.

8. The rotary valve pulse generator according to claim 7, characterized in that: The transmission main shaft comprises a transmission input shaft, an elastic torque limiter and a transmission output shaft. The transmission input shaft is connected to the transmission output shaft through the elastic torque limiter, and the transmission input shaft is connected to the inner magnetic ring.

9. The rotary valve pulse generator according to claim 8, characterized in that: The elastic torque limiter includes a cam body, a groove seat matched with the cam body, and a transmission base. The cam body is connected to the transmission input shaft, and the transmission base is connected to the transmission output shaft. The cam body and the groove seat are both arranged inside the transmission base. The cam body has a plurality of arc cams along the circumferential direction, and a plane groove is arranged between adjacent arc cams. The groove seat has a plurality of arc grooves along the circumferential direction, and a plane tooth is arranged between adjacent arc grooves. The arc cam is placed in the arc groove, and the plane tooth is placed in the plane groove.

10. The rotary valve pulse generator according to claim 9, characterized in that: The elastic torque limiter also includes a transmission rod and an elastic member arranged inside the transmission base. The transmission base has a transmission groove and a step surface inside. The first end of the transmission rod is fixed to the end surface of the groove seat away from the cam body, and the second end of the transmission rod is arranged in the transmission groove. The end surface of the groove seat away from the cam body, the transmission base and the transmission rod form an accommodating space. The elastic member is arranged in the accommodating space, and the first end is connected to the end surface of the groove seat away from the cam body, and the second end is connected to the step surface.

11. The rotary valve pulse generator according to claim 8, characterized in that: It also includes a pulse generating module, which includes a stator, a rotor and an auxiliary spring assembly. The transmission output shaft is connected to the rotor to drive the rotor to rotate. The rotor is connected to the auxiliary spring assembly through a crank-connecting rod mechanism. The rotor cooperates with the stator to generate pulses.

12. The rotary valve pulse generator according to claim 11, characterized in that: The auxiliary spring assembly includes a piston cylinder, a bottom elastic part, a top elastic part and a piston, wherein the bottom elastic part, the top elastic part and the piston are all arranged in the piston cylinder, and the piston is connected to the crank-connecting rod mechanism, and the crank-connecting rod mechanism can drive the piston to move in the piston cylinder. In the movement direction of the piston, the bottom elastic part and the top elastic part are respectively arranged between the piston and the piston cylinder.

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