A high-pressure sealed magnetic transmission device

Abstract

The present application discloses a high-pressure sealed magnetic transmission device, comprising an active rotor assembly, a sealed isolation assembly, and a driven rotor assembly, wherein the sealed isolation assembly comprises an isolation sleeve and a centering assembly, wherein a first sealed cavity is axially provided in the isolation sleeve, wherein the driven rotor assembly is disposed in the first sealed cavity, and wherein a receiving groove is circumferentially provided on the isolation sleeve, wherein the receiving groove is disposed around the outside of the first sealed cavity, and wherein the notch of the receiving groove faces upward, wherein the active rotor assembly is disposed in the receiving groove; wherein the active rotor assembly is axially slidably connected to the input shaft, wherein the centering assembly is sleeved on the outside of the isolation sleeve and fixed to the frame, and wherein the centering assembly can be locked or unlocked relative to the isolation sleeve. The purpose of the present application is to provide a high-pressure sealed magnetic transmission device that is easy to adjust torque, control eddy current loss, and reduce energy waste.

Description

Technical Field

[0001] The present application relates to the field of magnetic transmission, and in particular to a high-pressure sealed magnetic transmission device. Background Art

[0002] At present, sealed magnetic transmission devices are usually used in scenarios with high sealing requirements. General mechanical seals are difficult to avoid leakage due to the use of dynamic sealing methods, especially for high temperature and high pressure scenarios, the leakage is more serious; while sealed magnetic transmission adopts an active rotor assembly, a sealed isolation assembly and a driven rotor assembly to be nested with each other, so that the active rotor assembly connected to the input shaft and the driven rotor assembly connected to the output shaft are separated by the sealed isolation assembly and achieve relative independence, and the torque is transmitted through the interaction between the magnets on the active rotor assembly and the magnets on the driven rotor assembly; and the sealed isolation assembly can use a static sealing method to improve the sealing performance, so that the sealing effect is better and it is not easy to leak under high temperature and high pressure.

[0003] Sealed magnetic transmission usually has two schemes: planar magnetic transmission and coaxial magnetic transmission. The magnets of planar magnetic transmission are arranged along the circumferential direction, which is easier to install, but the transmitted torque is small. If the torque needs to be increased, the relative area of the active rotor assembly needs to be greatly increased; the magnets of coaxial magnetic transmission are arranged along the axial direction, and the transmitted torque is larger. It is mostly used in high temperature, high pressure and high torque conditions.

[0004] However, existing sealing isolation components have the following defects: eddy current loss is easily generated on the surface, energy is wasted, and the torque size cannot be changed as needed, resulting in misalignment of magnet coupling and a safety hazard. These are problems that technicians in this field need to solve. Summary of the Invention

[0005] One purpose of the present application is to provide a high-pressure sealed magnetic transmission device that can easily adjust torque, control eddy current loss, and reduce energy waste.

[0006] In order to achieve the above objectives, the technical solutions adopted in this application are:

[0007] A high-pressure sealed magnetic transmission device comprises an active rotor assembly, a sealed isolation assembly and a driven rotor assembly, wherein the active rotor assembly is connected to the input shaft, the sealed isolation assembly is sleeved on the outside of the driven rotor assembly, and the driven rotor assembly is connected to the output shaft, the sealed isolation assembly comprises an isolation sleeve and a centering assembly, a first sealed cavity is axially arranged in the isolation sleeve, the driven rotor assembly is arranged in the first sealed cavity, a receiving groove is circumferentially arranged on the isolation sleeve, the receiving groove is arranged around the outside of the first sealed cavity, and the notch of the receiving groove faces upward, and the active rotor assembly is arranged in the receiving groove; the active rotor assembly is slidably connected to the input shaft along the axial direction, the centering assembly is sleeved on the outside of the isolation sleeve and fixed to the machine The centering assembly is mounted on the frame, and the centering assembly can be locked or unlocked relative to the isolation sleeve. When the centering assembly is locked with the isolation sleeve, the centering assembly is suitable for contacting the outer wall of the isolation sleeve, limiting the axial and circumferential movement of the isolation sleeve, and controlling the coaxiality of the isolation sleeve with the active rotor assembly and the driven rotor assembly. When the centering assembly is unlocked with the isolation sleeve, the centering assembly is separated from the outer wall of the isolation sleeve, wherein the external force in the axial direction is suitable for driving the isolation sleeve to move axially upward and pass through the centering assembly, and the isolation sleeve is suitable for driving the active rotor assembly to move axially upward along the input shaft, thereby separating the isolation sleeve from the driven rotor assembly, and the external force in the radial outward direction is suitable for separating the isolation sleeve from the active rotor assembly.

[0008] The sealed magnetic transmission device includes an active rotor assembly, a sealed isolation assembly, and a driven rotor assembly. The active rotor assembly is connected to the input shaft and is provided with an active magnet, while the driven rotor assembly is provided with a driven magnet. The drive assembly generates power and drives the input shaft to rotate, thereby driving the active rotor assembly to rotate. The driven rotor assembly is connected to the output shaft. Due to the coupling effect between the active and driven rotor assemblies, the active rotor assembly drives the driven rotor assembly to rotate, thereby driving the output shaft to rotate. The sealed isolation assembly includes an isolation sleeve and a sealing flange. The inner wall of the isolation sleeve defines a first sealed chamber. The driven rotor assembly is disposed within the first sealed chamber. The isolation sleeve contacts the container opening through the sealing flange, achieving a better sealing effect through static sealing. The inner wall of the container defines a fourth sealed chamber. The first sealed chamber is connected to the fourth sealed chamber. The high temperature and high pressure within the container will act on the first sealed chamber.

[0009] Traditional sealed magnetic transmission devices are prone to eddy current losses, mainly because the isolation sleeve in the sealed isolation assembly is generally made of metal, and the isolation sleeve is fixed to the container surface by bolts or other fixing methods to achieve relative stillness with the sealing flange, container, etc., while the active magnet set on the active rotor assembly rotates circumferentially relative to the isolation sleeve, thus generating electromagnetic induction, thereby generating eddy current losses. The conventional practice is to use a metal with low conductivity to make the isolation sleeve (such as stainless steel), but the eddy current loss produced on its surface can still be as high as about 30%, and due to the eddy current effect, its surface will generate a lot of heat, requiring the introduction of cooling water, and the structure will also be more complicated; another conventional practice is to use non-metallic materials such as ceramics to manufacture the isolation sleeve to avoid the generation of eddy current effects, but in actual use, due to the high temperature and high pressure environment inside the container, non-metallic materials such as ceramics are relatively brittle and have a short service life, and the top-entry installation structure is used, which is limited by space. Once the isolation sleeve is damaged, it needs to be shut down and replaced for a long time, which is very inconvenient. In addition, the entire drive assembly needs to be removed during replacement to achieve the replacement of the isolation sleeve.

[0010] Therefore, the inventors of this application have developed a high-pressure sealed magnetic transmission device, which also adopts a top-entry installation structure, that is, the active rotor assembly, the sealed isolation assembly and the driven rotor assembly are all arranged on the top of the container, and are used in conjunction with a centering assembly and an isolation sleeve, and the active rotor assembly and the input shaft can slide axially. By unlocking and locking the centering assembly and the isolation sleeve, the replacement of the isolation sleeve becomes convenient. When the isolation sleeve made of ceramic is damaged, it can be easily replaced, reducing safety hazards and significantly reducing the downtime for maintenance.

[0011] What is more worth mentioning is that an active magnet is provided on the active rotor assembly, and the active magnet is detachably connected to the active rotor assembly; a driven magnet is provided on the driven rotor assembly, and the driven magnet is detachably connected to the driven rotor assembly. The sealed magnetic transmission device of the present application is adopted. Since the isolation sleeve adopts a double-layer structure, that is, a first sealed cavity is provided on the isolation sleeve, and its opening faces downward, and the driven rotor assembly is provided in the first sealed cavity; a receiving groove is provided around the outer side of the first sealed cavity, and the opening of the receiving groove faces upward, and the active rotor assembly is provided in the receiving groove; therefore, there is an interlayer between the first sealed cavity and the receiving groove. Therefore, by changing the thickness of the interlayer and the outer wall of the isolation sleeve, the volume of the first sealed cavity and the receiving groove can be changed to achieve the purpose of accommodating active magnets and driven magnets of different diameters and sizes, thereby achieving a change in torque and achieving the effect of adjusting the maximum output torque as needed. Of course, the isolation sleeve can also be made of metal. When the torque to be transmitted is small but the pressure in the container is high, the isolation sleeve made of metal can still be used to ensure the pressure-bearing requirements. However, the required torque is small, and a smaller active magnet can be used instead, thereby achieving the purpose of reducing eddy current loss and reducing energy consumption.

[0012] The centering assembly can be locked or unlocked relative to the isolation sleeve. When in the locked state, the centering assembly contacts the outer wall of the isolation sleeve and limits the circumferential and axial movement of the isolation sleeve, thereby achieving relative stillness of the isolation sleeve and the sealing flange, thereby achieving static sealing between the isolation sleeve and the sealing flange. The centering assembly can also control the coaxiality of the isolation sleeve and the active rotor assembly, and at the same time control the coaxiality of the isolation sleeve and the driven rotor assembly, so that after multiple disassembly and assembly, the relative position of the seal on the isolation sleeve will not change, thereby ensuring the sealing effect. If the centering assembly is not provided to control the coaxiality between the isolation sleeve and the active rotor assembly and the driven rotor assembly, after multiple disassembly and assembly, the isolation sleeve may be deflected to a large extent, causing a large degree of deformation and displacement of the seal, affecting the sealing effect under high temperature and high pressure conditions.

[0013] When in the unlocked state, an external force is first applied in the axial direction to drive the isolation sleeve to move axially upward and pass through the centering assembly. During this process, the bottom of the accommodating groove in the isolation sleeve contacts the bottom of the active rotor assembly, and the active rotor assembly is slidably connected to the input shaft in the axial direction. Therefore, the active rotor assembly is simultaneously driven to move axially upward. At this time, the isolation sleeve and the driven rotor assembly are separated in the axial direction. At this time, an external force is applied in the radial outward direction to separate the isolation sleeve and the active rotor assembly. Subsequently, different isolation sleeves can be replaced as needed to maximize torque utilization and reduce energy waste, and ceramic isolation sleeves that crack after being under pressure for a long time can be replaced to reduce safety hazards.

[0014] Further preferably, the centering assembly includes a shell, a support sleeve, a self-aligning drive assembly and a plurality of self-aligning balls, the shell being fixed to the frame, a receiving hole being axially penetrated on the shell, the support sleeve being axially arranged in the receiving hole, and the support sleeve being sleeved on the outside of the isolation sleeve, the isolation sleeve being slidable along the axial direction of the support sleeve, the self-aligning balls being circumferentially arranged on the top of the support sleeve, the self-aligning drive assembly being arranged on the inner wall of the receiving hole, and the self-aligning drive assembly being suitable for driving the self-aligning balls to move radially When the centering assembly is locked with the isolation sleeve, the center-aligning drive assembly drives the center-aligning ball to move inward, and the center-aligning ball contacts the outer wall of the isolation sleeve and limits the axial and circumferential movement of the isolation sleeve, and elastic deformation is generated between the isolation sleeve and the center-aligning ball; when the centering assembly is unlocked with the isolation sleeve, the isolation sleeve and the center-aligning ball restore the elastic deformation and drive the center-aligning ball to move radially outward, and the center-aligning ball is separated from the outer wall of the isolation sleeve, and the external force along the axial direction is suitable for driving the isolation sleeve to move axially.

[0015] There are many embodiments of the centering assembly, such as using a three-jaw chuck or a four-jaw chuck to achieve the centering effect. However, considering that in actual use, a top-entry installation structure is adopted, it is necessary to reduce the workload and difficulty of working at heights as much as possible. Therefore, in this preferred embodiment, a shell, a support sleeve, a centering drive assembly and a centering ball are used to achieve the centering and locking effects, and the centering drive assembly is used to achieve the radial inward movement or radial outward movement of the centering ball, so as to achieve the centering ball contacting the isolation sleeve or the centering ball is separated from the isolation sleeve. When the centering ball contacts the isolation sleeve, the centering assembly and the isolation sleeve are in a locked state; when the centering ball is separated from the isolation sleeve, the centering assembly and the isolation sleeve are in an unlocked state. The centering drive assembly can use a motor to control the push rod to control the radial movement of the centering ball.

[0016] The cam is secured to the bottom of the housing and has an axially extending edge that extends outwardly past the cam face of the second sealing member, the cam being secured to the bottom of the housing and circumferentially extending past the cam face of the second sealing member. The portion, the top of the yield portion and the inner wall of the accommodating hole jointly define a third sealing cavity, and the volumes of the second sealing cavity and the third sealing cavity are suitable for changing and limiting the axial position of the aligning sleeve. When the centering component is locked with the isolation sleeve, the volume of the second sealing cavity becomes smaller, and the volume of the third sealing cavity increases. The aligning sleeve moves axially upward along the support sleeve until the top of the aligning sleeve is higher than the top of the support sleeve. At this time, the inner wall of the aligning sleeve contacts the aligning ball and drives the aligning ball to move radially inward and undergo elastic deformation; when the centering component is unlocked with the isolation sleeve, the volume of the second sealing cavity increases, and the volume of the third sealing cavity becomes smaller. The aligning sleeve moves axially downward along the support sleeve until the top of the aligning sleeve is lower than the top of the support sleeve. At this time, the aligning ball moves radially outward until the inner wall of the aligning protrusion contacts the aligning ball, and the aligning ball is separated from the outer wall of the isolation sleeve.

[0017] By controlling the volume of the second and third sealing chambers, the aligning sleeve is able to move up and down, thereby causing the inner wall of the aligning sleeve to contact the aligning ball or the inner wall of the aligning protrusion to contact the aligning ball, thereby achieving radial movement of the aligning ball. When in the locked state, the inner wall of the aligning sleeve contacts the aligning ball, allowing the aligning ball to press against the isolation sleeve. When switching from the locked state to the unlocked state, the inner wall of the aligning sleeve separates from the aligning ball, and the pressure on the side of the aligning ball contacting the aligning sleeve suddenly disappears, while the pressure on the side of the aligning ball contacting the isolation sleeve is released outward, thereby driving the aligning ball to move radially outward until the aligning ball contacts the inner wall of the aligning protrusion, at which point the aligning ball separates from the isolation sleeve. The isolation sleeve can move freely in the axial direction, achieving the effect of replacing the isolation sleeve.

[0018] It is further preferred that a through port is provided at the top of the shell, which is connected to the second sealed chamber, and the gas or hydraulic oil is suitable for entering or exiting the second sealed chamber through the through port and changing the volume of the second sealed chamber; a plurality of springs are circumferentially arranged in the third sealed chamber, one end of the spring is connected to the top of the yield portion, and the other end of the spring is connected to the bottom of the self-aligning sleeve, when the gas or the hydraulic oil enters the second sealed chamber through the through port, the volume of the second sealed chamber increases and drives the self-aligning sleeve to move axially downward, wherein the spring is compressed and accumulates elastic potential energy; when the gas or the hydraulic oil exits the second sealed chamber through the through port, the volume of the second sealed chamber becomes smaller, and the spring is suitable for releasing elastic potential energy and pushing the self-aligning sleeve to move axially upward.

[0019] In another preferred embodiment, the top of the support sleeve is high in the middle and low at the edges.

[0020] Another preferred embodiment is that a self-aligning ball retainer is provided on the top of the support sleeve, and a plurality of self-aligning ball holes matching the self-aligning balls are radially provided on the inner wall of the self-aligning ball retainer, the diameter of the self-aligning ball hole is smaller than the diameter of the self-aligning ball, and the self-aligning ball hole is suitable for limiting the maximum displacement of the radial inward movement of the self-aligning ball.

[0021] Another preferred embodiment is that the sealing isolation assembly further comprises a mounting seat, which is fixedly connected to the frame, and a mounting through hole matching the shell is provided on the mounting seat, the inner wall of the mounting through hole abuts against the outer wall of the shell, the inner wall of the mounting through hole protrudes radially inwardly to provide a limiting portion, the top of the limiting portion abuts against the bottom of the shell, and the limiting portion is suitable for limiting the axial displacement of the shell.

[0022] Another preference is that a pressure-bearing cover plate is provided on the top of the isolation sleeve, the pressure-bearing cover plate is detachably connected to the centering assembly, the bottom of the pressure-bearing cover plate abuts against the top of the isolation sleeve, and the pressure-bearing cover plate is suitable for limiting the axial upward displacement of the isolation sleeve.

[0023] Another preferred embodiment is that a spline is provided on the outer wall of the active rotor assembly, and a spline groove matching the spline is provided on the input shaft. The active rotor assembly is suitable for cooperating with the spline groove and transmitting torque through the spline, and the active rotor assembly can slide axially along the spline groove.

[0024] In another embodiment, the sealing isolation assembly includes two centering assemblies, and the centering assemblies are respectively arranged at the upper and lower ends of the isolation sleeve.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] (1) Using an easily replaceable isolation sleeve to expand the selection of isolation sleeve materials, thereby achieving a ceramic isolation sleeve with a shorter service life but smaller eddy current loss. After being used several times, the isolation sleeve with cracks can be quickly replaced without the need for long-term downtime maintenance, and the difficulty of high-altitude operation is reduced, and the isolation sleeve can be quickly disassembled and replaced;

[0027] (2) By setting a first sealing cavity and a receiving groove, the purpose of replacing active magnets and driven magnets with different magnetic forces can be achieved by changing the volumes of the first sealing cavity and the receiving groove, thereby achieving adjustable torque, and the maximum output torque can be adjusted as needed to cope with complex working conditions and reduce energy consumption; and the coaxiality between the isolation sleeve and the active rotor assembly and the driven rotor assembly is controlled by the centering component, so that the relative position of the isolation sleeve is maintained after multiple replacements, thereby reducing the deformation and displacement of the seal therein, which affects its sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of an embodiment of a high-pressure sealed magnetic transmission device of the present application, showing the structure and position of each component;

[0029] Figure 2 This is an exploded view of an embodiment of the high-pressure sealed magnetic transmission device of the present application, showing the relative positional relationship of various components;

[0030] Figure 3 A schematic diagram of an embodiment of a high-pressure sealed magnetic transmission device of the present application, showing the separation of the isolation sleeve from the centering assembly;

[0031] Figure 4 This is a station diagram of the centering assembly of an embodiment of the high-pressure sealed magnetic transmission device of the present application, showing the housing, support sleeve, centering drive assembly, centering ball and other structures;

[0032] Figure 5a A schematic diagram of a centering assembly of an embodiment of a high-pressure sealed magnetic transmission device of the present application in an unlocked state;

[0033] Figure 5b This is a schematic diagram of a centering assembly of an embodiment of a high-pressure sealed magnetic transmission device of the present application in a locked state;

[0034] Figure 6 This is a partial enlarged view of position A of an embodiment of the high-pressure sealed magnetic transmission device of the present application, showing the second sealed cavity and the third sealed cavity, and the centering assembly is in the unlocked state at this time;

[0035] Figure 7 This is a partial enlarged view of position B of an embodiment of the high-pressure sealed magnetic transmission device of the present application, showing that the centering assembly is in a locked state;

[0036] Figure 8 A partial half-section view of a housing of an embodiment of a high-pressure sealed magnetic transmission device of the present application, showing a first sealing portion and a second sealing portion;

[0037] Figure 9 An axonometric view of a support sleeve of an embodiment of a high-pressure sealed magnetic transmission device of the present application, showing a relief portion;

[0038] Figure 10 An axonometric view of an aligning sleeve of an embodiment of a high-pressure sealed magnetic transmission device of the present application, showing the aligning sleeve and the aligning protrusion;

[0039] Figure 11 This is an axonometric view of the self-aligning balls and the self-aligning ball retainer of an embodiment of the high-pressure sealed magnetic transmission device of the present application, illustrating the structure of the self-aligning ball retainer;

[0040] Figure 12 This is a schematic diagram of an isolation sleeve of an embodiment of a high-pressure sealed magnetic transmission device of the present application, showing a first sealing cavity and a receiving groove.

[0041] In the figure: 1, active rotor assembly; 11, spline; 12, active magnet; 2, sealing isolation assembly; 21, isolation sleeve; 211, first sealing cavity; 212, receiving groove; 213, partition; 22, centering assembly; 221, housing; 2211, first sealing portion; 2212, second sealing portion; 2213, through port; 222, support sleeve; 2221, yield portion; 223, centering drive assembly; 2231, centering sleeve; 2232, centering protrusion; 2233, Spring; 224, self-aligning ball; 225, accommodating hole; 226, second sealed chamber; 227, third sealed chamber; 228, self-aligning ball retainer; 2281, self-aligning ball hole; 23, pressure-bearing cover plate; 24, mounting seat; 241, mounting through hole; 242, limiting portion; 25, sealing flange; 3, driven rotor assembly; 31, driven magnet; 100, container; 101, fourth sealed chamber; 200, input shaft; 201, spline groove; 300, output shaft; 400, frame. DETAILED DESCRIPTION

[0042] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0043] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0044] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0045] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0046] The sealed magnetic transmission device includes an active rotor assembly 1, a sealed isolation assembly 2 and a driven rotor assembly 3, wherein the active rotor assembly 1 is connected to the input shaft 200, and an active magnet 12 is provided on the active rotor assembly 1, and a driven magnet 31 is provided on the driven rotor assembly 3. The driving assembly generates power and drives the input shaft 200 to rotate, thereby driving the active rotor assembly 1 to rotate. The driven rotor assembly 3 is connected to the output shaft 300. Due to the coupling effect between the active rotor assembly 1 and the driven rotor assembly 3, the active rotor assembly 1 drives the driven rotor assembly 3 to rotate, thereby driving the output shaft 300 to rotate. The sealing isolation assembly 2 includes an isolation sleeve 21 and a sealing flange 25. The inner wall of the isolation sleeve 21 defines a first sealing chamber 211. The driven rotor assembly 3 is arranged in the first sealing chamber 211. The isolation sleeve 21 contacts the opening of the container 100 through the sealing flange 25, and a better sealing effect is achieved through static sealing. The inner wall of the container 100 defines a fourth sealing chamber 101. The first sealing chamber 211 is connected to the fourth sealing chamber 101. The high temperature and high pressure in the container 100 will act on the first sealing chamber 211.

[0047] Usually, the sealed magnetic transmission device is installed on the top of the container 100 in a top-entry manner. Due to space and position limitations, a coaxial magnetic transmission method is generally adopted to reduce space waste and reduce manufacturing costs.

[0048] However, the traditional sealed magnetic transmission device is prone to eddy current loss, mainly because the isolation sleeve 21 in the sealed isolation component 2 is generally made of metal, and the isolation sleeve 21 is fixedly connected to the surface of the container 100 by bolts or other fixing methods, so as to achieve relative stillness with the sealing flange 25, the container 100, etc., and the active magnet 12 provided on the active rotor component 1 rotates circumferentially relative to the isolation sleeve 21, thereby generating electromagnetic induction, thereby generating eddy current loss. The conventional practice is to use a metal with low conductivity to make the isolation sleeve 21 (such as stainless steel), but the eddy current loss produced on its surface can still be as high as about 30%, and due to Eddy current effect, its surface will generate a lot of heat, it is necessary to introduce cooling water, and the structure will be more complicated; another conventional practice is to use ceramics and other non-metallic materials to manufacture the isolation sleeve 21 to avoid the generation of eddy current effect, but in actual use, since the container 100 is mostly used in a high temperature and high pressure environment, ceramics and other non-metallic materials are relatively brittle and have a short service life, and the use of a top-entry installation structure is subject to space limitations. Once the isolation sleeve 21 is damaged, it needs to be shut down and replaced for a long time, which is very inconvenient. Once replacement is required, the drive assembly needs to be removed as a whole to replace the isolation sleeve 21. Therefore, the use of ceramics and other non-metallic materials to manufacture the isolation sleeve 21 and use it in high temperature and high pressure conditions is limited.

[0049] Based on this, the inventors of this application have developed a high-pressure sealed magnetic transmission device, one embodiment of which is as follows: Figures 1 to 12 As shown, it includes an active rotor assembly 1, a sealing isolation assembly 2 and a driven rotor assembly 3. The active rotor assembly 1 is connected to the input shaft 200, and the sealing isolation assembly 2 is sleeved on the outside of the driven rotor assembly 3. The driven rotor assembly 3 is connected to the output shaft 300. The sealing isolation assembly 2 includes an isolation sleeve 21 and a centering assembly 22. A first sealing cavity 211 is axially provided in the isolation sleeve 21. The driven rotor assembly 3 is arranged in the first sealing cavity 211. A receiving groove 212 is circumferentially provided on the isolation sleeve 21. The receiving groove 212 is arranged around the outside of the first sealing cavity 211, and the notch of the receiving groove 212 faces upward. The active rotor assembly 1 is arranged in the receiving groove 212; the active rotor assembly 1 is slidably connected to the input shaft 200 along the axial direction, and the centering assembly 22 is sleeved on the outside of the isolation sleeve 21. The centering assembly 22 is fixed to the frame 400. The centering assembly 22 can be locked or unlocked relative to the isolation sleeve 21. When the centering assembly 22 is locked with the isolation sleeve 21, the centering assembly 22 is suitable for contacting the outer wall of the isolation sleeve 21, limiting the axial and circumferential movement of the isolation sleeve 21, and controlling the coaxiality of the isolation sleeve 21 with the active rotor assembly 1 and the driven rotor assembly 3. When the centering assembly 22 is unlocked with the isolation sleeve 21, the centering assembly 22 is separated from the outer wall of the isolation sleeve 21, wherein an external force in the axial direction is suitable for driving the isolation sleeve 21 to move axially upward and pass through the centering assembly 22. The isolation sleeve 21 is suitable for driving the active rotor assembly 1 to move axially upward along the input shaft 200, thereby separating the isolation sleeve 21 from the driven rotor assembly 3, and an external force in the radial direction outward is suitable for separating the isolation sleeve 21 from the active rotor assembly 1. The frame 400 is usually fixed to the container 100. A drive assembly (such as a motor) can also be generally installed on the frame 400.

[0050] The inventors of this application have developed a high-pressure sealed magnetic transmission device, which also adopts a top-entry installation structure, that is, the active rotor assembly 1, the sealed isolation assembly 2 and the driven rotor assembly 3 are all arranged on the top of the container 100, and are used in conjunction with the centering assembly 22 and the isolation sleeve 21, and the active rotor assembly 1 and the input shaft 200 can slide axially. By unlocking and locking the centering assembly 22 and the isolation sleeve 21, the replacement of the isolation sleeve 21 becomes convenient. When the isolation sleeve 21 made of ceramic is damaged, by operating the isolation sleeve 21 to move upward along the axis and push the active rotor assembly 1 to move upward along the axial direction, a radially outward force is applied at this time, which can facilitate replacement, reduce safety hazards, and significantly reduce downtime and maintenance time.

[0051] What is more worth mentioning is that Figure 3As shown, the active rotor assembly 1 is provided with an active magnet 12, which is detachably connected to the active rotor assembly 1, and the driven rotor assembly 3 is provided with a driven magnet 31, which is detachably connected to the driven rotor assembly 3. The sealed magnetic transmission device of the present application is adopted. Since the isolation sleeve 21 adopts a double-layer structure, that is, a first sealed cavity 211 is provided on the isolation sleeve 21, whose opening faces downward, and the driven rotor assembly 3 is provided in the first sealed cavity 211; the outer side of the first sealed cavity 211 surrounds A receiving groove 212 is provided, and the opening of the receiving groove 212 is facing upward, and the active rotor assembly 1 is provided in the receiving groove 212; therefore, there is an interlayer 213 between the first sealed cavity 211 and the receiving groove 212. Therefore, by changing the thickness of the interlayer 213 and the outer wall of the isolation sleeve 21, the volume of the first sealed cavity 211 and the receiving groove 212 can be changed to accommodate active magnets 12 and driven magnets 31 of different diameters and sizes, thereby achieving a change in torque and achieving the effect of adjusting the maximum output torque as needed. Of course, the isolation sleeve 21 can also be made of metal. When the torque to be transmitted is small, but the pressure in the container 100 is high, the isolation sleeve 21 made of metal can still be used to ensure the pressure-bearing requirements. However, since the torque required is small, a smaller active magnet 12 or driven magnet 31 can be used instead, thereby achieving the purpose of reducing eddy current loss and reducing energy consumption.

[0052] The centering component 22 can be locked or unlocked relative to the isolation sleeve 21. When in the locked state, the centering component 22 contacts the outer wall of the isolation sleeve 21 and limits the circumferential and axial movement of the isolation sleeve 21, thereby achieving relative stillness of the isolation sleeve 21 and the sealing flange 25, thereby achieving static sealing between the isolation sleeve 21 and the sealing flange 25. The centering component 22 can also control the coaxiality of the isolation sleeve 21 and the active rotor assembly 1, and at the same time control the coaxiality of the isolation sleeve 21 and the driven rotor assembly 3, so that after multiple disassembly and assembly, the relative position of the seal on the isolation sleeve 21 will not change, thereby ensuring the sealing effect; if the centering component 22 is not set to control the coaxiality between the isolation sleeve 21 and the active rotor assembly 1 and the driven rotor assembly 3, after multiple disassembly and assembly, the isolation sleeve 21 may be deflected to a large extent, causing a large degree of deformation and displacement of the seal, affecting the sealing effect under high temperature and high pressure conditions.

[0053] like Figure 3As shown in FIG, when in the unlocked state, an external force F1 is first applied in the axial direction to drive the isolation sleeve 21 to move axially upward and pass through the centering assembly 22. In this process, the bottom of the accommodating groove 212 in the isolation sleeve 21 contacts the bottom of the active rotor assembly 1, and the active rotor assembly 1 is slidably connected to the input shaft 200 in the axial direction. Therefore, the active rotor assembly 1 is simultaneously driven to move axially upward. At this time, the isolation sleeve 21 is separated from the driven rotor assembly 3 in the axial direction. At this time, an external force F2 is applied in the radial direction outward to separate the isolation sleeve 21 and the active rotor assembly 1. The position of the isolation sleeve 21 is shown in FIG. Figure 3 As shown by the middle dotted line, different isolation sleeves 21 can then be replaced as needed to maximize torque utilization and reduce energy waste, and the ceramic isolation sleeves 21 that crack after being under pressure for a long time can be replaced to reduce safety hazards.

[0054] More preferably, Figure 4 and Figure 5a and Figure 5b As shown, the centering component 22 includes a shell 221, a support sleeve 222, a centering drive component 223 and a plurality of centering balls 224. The shell 221 is fixed on the frame 400. The shell 221 is provided with an accommodating hole 225 along the axial direction. The support sleeve 222 is axially arranged in the accommodating hole 225, and the support sleeve 222 is sleeved on the outside of the isolation sleeve 21. The isolation sleeve 21 can slide along the axial direction of the support sleeve 222. The top of the support sleeve 222 is circumferentially surrounded by the centering balls 224. The centering drive component 223 is arranged on the inner wall of the accommodating hole 225, and the centering drive component 223 is suitable for driving the centering The ball 224 moves radially. When the centering assembly 22 is locked with the isolation sleeve 21, the centering drive assembly 223 drives the centering ball 224 to move inward, and the centering ball 224 contacts the outer wall of the isolation sleeve 21, and limits the axial and circumferential movement of the isolation sleeve 21, and elastic deformation is generated between the isolation sleeve 21 and the centering ball 224; when the centering assembly 22 is unlocked with the isolation sleeve 21, the isolation sleeve 21 and the centering ball 224 restore the elastic deformation and drive the centering ball 224 to move radially outward, and the centering ball 224 is separated from the outer wall of the isolation sleeve 21, and the external force F1 along the axial direction is suitable for driving the isolation sleeve 21 to move axially.

[0055] It is worth mentioning that there are many embodiments of the centering component 22, such as using a three-jaw chuck or a four-jaw chuck to achieve the centering effect, but considering that in actual use, a top-entry installation structure is adopted, it is necessary to reduce the workload and difficulty of working at heights as much as possible. Therefore, in this preferred embodiment, a shell 221, a support sleeve 222, a centering drive component 223 and a centering ball 224 are used to achieve the centering and locking effects, and the centering drive component 223 is used to achieve the radial inward movement or radial outward movement of the centering ball 224, so that the centering ball 224 contacts the isolation sleeve 21 or the centering ball 224 is separated from the isolation sleeve 21. When the centering ball 224 contacts the isolation sleeve 21, the centering component 22 and the isolation sleeve 21 are in a locked state (such as Figure 1 When the self-aligning ball 224 is separated from the isolation sleeve 21, the centering assembly 22 and the isolation sleeve 21 are in an unlocked state (as shown); Figure 3 The aligning drive assembly 223 has various embodiments. For example, a motor can be used to control a push rod to control the radial movement of the aligning ball 224. When the aligning ball 224 moves radially inward, the aligning drive assembly 223 presses the aligning ball 224 and forces the aligning ball 224 to contact the outer wall of the isolation sleeve 21. When the aligning drive assembly 223 is switched to the unlocked state, the aligning drive assembly 223 removes the pressing force, and the pressure on the side of the aligning ball 224 in contact with the aligning drive assembly 223 suddenly disappears. The side of the aligning ball 224 in contact with the isolation sleeve 21 recovers its elastic deformation, and drives the aligning ball 224 to move radially outward, thereby separating the aligning ball 224 from the isolation sleeve 21.

[0056] More preferably, Figure 6 As shown, the top of the shell 221 protrudes into the accommodating hole 225 and is provided with a first sealing portion 2211. The inner wall of the first sealing portion 2211 is suitable for contacting the outer wall of the isolation sleeve 21. The bottom of the first sealing portion 2211 protrudes downward in the axial direction and is provided with a second sealing portion 2212. Figure 9As shown, the top of the support sleeve 222 contracts radially inward to form a yield portion 2221. The aligning drive assembly 223 includes an aligning sleeve 2231. The aligning sleeve 2231 is axially arranged above the yield portion 2221 and sleeved on the outside of the support sleeve 222. The aligning sleeve 2231 is suitable for sliding up and down along the axial direction of the support sleeve 222. The top of the aligning sleeve 2231 protrudes upward to be provided with an aligning protrusion 2232, and the aligning protrusion 2232 is circumferentially arranged around the top of the aligning sleeve 2231. The inner diameter D1 of the centering protrusion 2232 is larger than the inner diameter D2 of the centering sleeve 2231, and the outer wall of the centering protrusion 2232 contacts the inner wall of the second sealing portion 2212; the outer wall of the centering protrusion 2232, the inner wall of the accommodating hole 225, the bottom of the first sealing portion 2211 and the outer wall of the second sealing portion 2212 jointly define a second sealing cavity 226, the bottom of the centering sleeve 2231, the top of the yielding portion 2221 and the inner wall of the accommodating hole 225 jointly define a third sealing cavity 227, and the third sealing cavity 228. The volumes of the second sealing chamber 226 and the third sealing chamber 227 are adapted to change and limit the axial position of the aligning sleeve 2231. When the centering assembly 22 is locked with the isolation sleeve 21, the volume of the second sealing chamber 226 becomes smaller, and the volume of the third sealing chamber 227 increases. The aligning sleeve 2231 moves upward along the axial direction of the support sleeve 222 until the top of the aligning sleeve 2231 is higher than the top of the support sleeve 222. At this time, the inner wall of the aligning sleeve 2231 contacts the aligning ball 224 and drives the aligning ball 224 radially. When the centering assembly 22 is unlocked from the isolation sleeve 21, the volume of the second sealing chamber 226 increases, the volume of the third sealing chamber 227 decreases, and the aligning sleeve 2231 moves axially downward along the support sleeve 222 until the top of the aligning sleeve 2231 is lower than the top of the support sleeve 222. At this time, the aligning ball 224 recovers its elastic deformation and moves radially outward until the inner wall of the aligning protrusion 2232 contacts the aligning ball 224, and the aligning ball 224 is separated from the outer wall of the isolation sleeve 21. In this specific embodiment, the change in the volume of the second sealing chamber 226 and the third sealing chamber 227 is reflected in their height. When switching from the locked state to the unlocked state, the volume of the second sealing chamber 226 increases, the volume of the third sealing chamber 227 decreases, and the aligning sleeve 2231 moves downward. When switching from the unlocked state to the locked state, the volume of the second sealing chamber 226 decreases, the volume of the third sealing chamber 227 increases, and the aligning sleeve 2231 moves upward.

[0057] The volume of the second sealing cavity 226 and the third sealing cavity 227 is controlled to realize the up and down movement of the aligning sleeve 2231, so that the inner wall of the aligning sleeve 2231 is in contact with the aligning ball 224 or the inner wall of the aligning protrusion 2232 is in contact with the aligning ball 224, thereby realizing the radial movement of the aligning ball 224; when in the locked state, the inner wall of the aligning sleeve 2231 is in contact with the aligning ball 224, so that the aligning ball 224 can press the isolation sleeve 21 and produce Elastic deformation; when switching from the locked state to the unlocked state, the inner wall of the aligning sleeve 2231 separates from the aligning ball 224, and the pressure on the side where the aligning ball 224 contacts the aligning sleeve 2231 suddenly disappears, while the pressure on the side where the aligning ball 224 contacts the isolation sleeve 21 is released outward, thereby driving the aligning ball 224 to move radially outward until the aligning ball 224 contacts the inner wall of the aligning protrusion 2232, at which point the aligning ball 224 separates from the isolation sleeve 21. The isolation sleeve 21 can move freely in the axial direction, achieving the effect of replacing the isolation sleeve 21.

[0058] It should be noted that the volumes of the second sealed cavity 226 and the third sealed cavity 227 can be adjusted in a variety of ways, such as using air holes or hydraulic control, to achieve the purpose of adjusting the volumes of the second sealed cavity 226 and the third sealed cavity 227 as needed. Controlling the radial movement of the centering ball 224 in this manner can greatly simplify the switching between the locked and unlocked states of the centering assembly 22 and the isolation sleeve 21, reducing the intensity and difficulty of high-altitude operations.

[0059] More preferably, Figure 5a and Figure 5b As shown, a through port 2213 is provided at the top of the shell 221, and the through port 2213 is connected to the second sealed chamber 226. Gas or hydraulic oil is suitable for entering or exiting the second sealed chamber 226 through the through port 2213, and changing the volume of the second sealed chamber 226; a plurality of springs 2233 are circumferentially arranged in the third sealed chamber 227, one end of the spring 2233 is connected to the top of the yield portion 2221, and the other end of the spring 2233 is connected to the bottom of the aligning sleeve 2231. When gas or hydraulic oil enters the second sealed chamber 226 through the through port 2213, the volume of the second sealed chamber 226 increases and drives the aligning sleeve 2231 to move axially downward, wherein the spring 2233 is compressed and accumulates elastic potential energy; when gas or hydraulic oil exits the second sealed chamber 226 through the through port 2213, the volume of the second sealed chamber 226 becomes smaller, and the spring 2233 is suitable for releasing elastic potential energy and pushing the aligning sleeve 2231 to move axially upward.

[0060] The volume of the second sealing chamber 226 is controlled by gas or hydraulic oil, and a spring 2233 is provided in the third sealing chamber 227 to adaptively store elastic potential energy, which can further simplify the control of the axial movement of the aligning sleeve 2231. When gas or hydraulic oil enters the second sealing chamber 226 through the opening 2213, the volume of the second sealing chamber 226 increases, and the volume of the third sealing chamber 227 is compressed, and the spring 2233 accumulates elastic potential energy. At this time, the aligning sleeve 2231 moves downward, separating the aligning ball 224 from the isolation sleeve 21. When gas or hydraulic oil passes through the opening 2213, the aligning sleeve 2231 moves downward, separating the aligning ball 224 from the isolation sleeve 21. When the opening 2213 exits the second sealing chamber 226, the spring 2233 releases its elastic potential energy and drives the aligning sleeve 2231 to move upward, so that the inner wall of the aligning sleeve 2231 contacts the aligning ball 224, and forces the aligning ball 224 to press the outer wall of the isolation sleeve 21, and limit the circumferential and axial movement of the isolation sleeve 21. Moreover, due to the elastic force of the spring 2233, the inner wall of the aligning sleeve 2231 always presses the aligning ball 224, and can be adaptively adjusted according to the different outer diameters of the isolation sleeve 21, so as to conveniently accommodate isolation sleeves 21 with different outer diameters and meet the needs of more working conditions.

[0061] Another preferred embodiment is that the top of the support sleeve 222 is high in the middle and low at the edges. Figure 6 As shown, the top middle height of the support sleeve 222 is H1, and the edge height is H2, satisfying H1>H2.

[0062] When the inner wall of the aligning sleeve 2231 is separated from the aligning ball 224, the aligning ball 224, under the action of gravity, will roll from the center to the edge of the support sleeve 222 until the aligning ball 224 contacts the inner wall of the aligning protrusion 2232. Therefore, maintaining the top of the support sleeve 222 with a high center and low edges can better utilize gravity, so that the aligning ball 224 can be smoothly separated from the isolation sleeve 21 when in the unlocked state, preventing interference.

[0063] Another preferred option is Figure 11 As shown, a self-aligning ball retainer 228 is provided on the top of the support sleeve 222, and a plurality of self-aligning ball holes 2281 matching the self-aligning balls 224 are radially provided on the inner wall of the self-aligning ball retainer 228. The diameter D4 of the self-aligning ball hole 2281 is smaller than the diameter D3 of the self-aligning ball 224. The self-aligning ball hole 2281 is suitable for limiting the maximum displacement of the radial inward movement of the self-aligning ball 224.

[0064] Setting the diameter D4 of the centering ball hole 2281 to be smaller than the diameter D3 of the centering ball 224 can prevent the centering ball 224 from moving inward too much due to the outer diameter of the isolation sleeve 21 being too small when the centering assembly 22 and the isolation sleeve 21 are in a locked state, causing the centering ball 224 to detach from the centering assembly 22 and cause the centering assembly 22 to fail.

[0065] Another preferred option is Figure 2and Figure 3 As shown, the sealing isolation assembly 2 also includes a mounting base 24, which is fixedly connected to the frame 400. A mounting through hole 241 matching the shell 221 is provided on the mounting base 24. The inner wall of the mounting through hole 241 abuts against the outer wall of the shell 221. The inner wall of the mounting through hole 241 protrudes radially inward to provide a limiting portion 242. The top of the limiting portion 242 abuts against the bottom of the shell 221. The limiting portion 242 is suitable for limiting the axial displacement of the shell 221.

[0066] The limiting portion 242 is provided to fix the shell 221 to the mounting base 24 and to the frame 400 through the mounting base 24. The mounting base 24 and the shell 221 can be fixed by welding or by other means to prevent the centering assembly 22 from detaching from the mounting base 24 due to the high pressure inside the container 100.

[0067] Another preferred option is Figure 1 As shown, a pressure cover plate 23 is provided on the top of the isolation sleeve 21. The pressure cover plate 23 is detachably connected to the centering assembly 22. The bottom of the pressure cover plate 23 contacts the top of the isolation sleeve 21. The pressure cover plate 23 is suitable for limiting the axial upward displacement of the isolation sleeve 21.

[0068] The purpose of setting the pressure cover plate 23 is also to assist in compressing the isolation sleeve 21 to prevent the isolation sleeve 21 from being separated from the centering component 22 and being lifted up due to excessive pressure in the container 100, and to increase the locking force of the isolation sleeve 21 on the seal to enhance the sealing effect.

[0069] Another preferred option is Figure 2 As shown, a spline 11 is provided on the outer wall of the active rotor assembly 1, and a spline groove 201 matching the spline 11 is provided on the input shaft 200. The active rotor assembly 1 is suitable for cooperating with the spline groove 201 and transmitting torque through the spline 11, and the active rotor assembly 1 can slide axially along the spline groove 201.

[0070] The spline 11 and the spline groove 201 are used to achieve the effects of transmitting torque and axial relative sliding. The production method is relatively simple, and the torque transmission is better, and slippage is not likely to occur.

[0071] Another preferred option is Figure 2 As shown, the sealing isolation assembly 2 includes two centering assemblies 22 , which are respectively arranged at the upper and lower ends of the isolation sleeve 21 .

[0072] Providing two centering components 22 can increase the fixing effect of the isolation sleeve 21 , further optimize its locking force under high-pressure working conditions, and fully limit the axial and circumferential displacement of the isolation sleeve 21 .

[0073] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A high-pressure sealed magnetic transmission device, comprising a driving rotor assembly, a sealing isolation assembly, and a driven rotor assembly, wherein the driving rotor assembly is connected to an input shaft, the sealing isolation assembly is sleeved on the outside of the driven rotor assembly, and the driven rotor assembly is connected to an output shaft, characterized in that: The sealing isolation assembly includes an isolation sleeve and a centering assembly. A first sealing cavity is axially arranged in the isolation sleeve. The driven rotor assembly is arranged in the first sealing cavity. A receiving groove is circumferentially arranged on the isolation sleeve. The receiving groove is arranged around the outside of the first sealing cavity, and the notch of the receiving groove faces upward. The active rotor assembly is arranged in the receiving groove; the active rotor assembly is slidably connected to the input shaft along the axial direction, the centering assembly is sleeved on the outside of the isolation sleeve and fixed to the frame, and the centering assembly can be locked or unlocked relative to the isolation sleeve. When the centering assembly is locked with the isolation sleeve, the The centering assembly is suitable for contacting the outer wall of the isolation sleeve, limiting the axial and circumferential movement of the isolation sleeve, and controlling the coaxiality of the isolation sleeve with the active rotor assembly and the driven rotor assembly; when the centering assembly is unlocked from the isolation sleeve, the centering assembly is separated from the outer wall of the isolation sleeve, wherein an external force in the axial direction is suitable for driving the isolation sleeve to move axially upward and pass through the centering assembly, the isolation sleeve is suitable for driving the active rotor assembly to move axially upward along the input shaft, thereby separating the isolation sleeve from the driven rotor assembly, and a radially outward external force is suitable for separating the isolation sleeve from the active rotor assembly.

2. A high-pressure sealed magnetic transmission device according to claim 1, characterized in that: The centering assembly includes a shell, a support sleeve, a centering drive assembly and a plurality of centering balls. The shell is fixed on the frame, and an accommodating hole is axially penetrated on the shell. The support sleeve is axially arranged in the accommodating hole, and the support sleeve is sleeved on the outside of the isolation sleeve. The isolation sleeve can slide along the axial direction of the support sleeve, and the centering balls are circumferentially arranged around the top of the support sleeve. The centering drive assembly is arranged on the inner wall of the accommodating hole, and the centering drive assembly is suitable for driving the centering balls to move radially. When the centering assembly is locked with the isolation sleeve, the centering drive assembly drives the centering balls to move inward, and the centering balls contact the outer wall of the isolation sleeve and limit the axial and circumferential movement of the isolation sleeve, and the isolation sleeve and the centering balls produce elastic deformation; when the centering assembly is unlocked with the isolation sleeve, the isolation sleeve and the centering balls restore the elastic deformation and drive the centering balls to move radially outward, and the centering balls are separated from the outer wall of the isolation sleeve, and the external force along the axial direction is suitable for driving the isolation sleeve to move axially.

3. A high-pressure sealed magnetic transmission device according to claim 2, characterized in that: The top of the shell is provided with a first sealing portion protruding into the accommodating hole, and the inner wall of the first sealing portion is suitable for contacting the outer wall of the isolation sleeve. The bottom of the first sealing portion is provided with a second sealing portion protruding axially downward, and the top of the support sleeve is radially contracted inwardly to form a yield portion. The self-aligning drive assembly includes a self-aligning sleeve, which is axially arranged above the yield portion and sleeved on the outside of the support sleeve, and the self-aligning sleeve is suitable for sliding up and down along the axial direction of the support sleeve. The top of the self-aligning sleeve is provided with a self-aligning protrusion protruding upward, and the self-aligning protrusion is circumferentially arranged on the top of the self-aligning sleeve, wherein the inner diameter D1 of the self-aligning protrusion is larger than the inner diameter D2 of the self-aligning sleeve, and the outer wall of the self-aligning protrusion contacts the inner wall of the second sealing portion; the outer wall of the self-aligning protrusion, the inner wall of the accommodating hole, the bottom of the first sealing portion and the outer wall of the second sealing portion jointly define a second sealing cavity, and the bottom of the self-aligning sleeve, The top of the yield portion and the inner wall of the accommodating hole jointly define a third sealing chamber, and the volumes of the second sealing chamber and the third sealing chamber change and limit the axial position of the aligning sleeve. When the centering assembly is locked with the isolation sleeve, the volume of the second sealing chamber becomes smaller, and the volume of the third sealing chamber increases. The aligning sleeve moves axially upward along the support sleeve until the top of the aligning sleeve is higher than the top of the support sleeve. At this time, the inner wall of the aligning sleeve contacts the aligning ball and drives the aligning ball to move radially inward and undergo elastic deformation; when the centering assembly is unlocked with the isolation sleeve, the volume of the second sealing chamber increases, and the volume of the third sealing chamber becomes smaller. The aligning sleeve moves axially downward along the support sleeve until the top of the aligning sleeve is lower than the top of the support sleeve. At this time, the aligning ball moves radially outward until the inner wall of the aligning protrusion contacts the aligning ball, and the aligning ball is separated from the outer wall of the isolation sleeve.

4. A high-pressure sealed magnetic transmission device according to claim 3, characterized in that: A through port is provided on the top of the shell, which is connected to the second sealed chamber, and gas or hydraulic oil is suitable for entering or exiting the second sealed chamber through the through port, and changing the volume of the second sealed chamber; a plurality of springs are circumferentially arranged in the third sealed chamber, one end of the spring is connected to the top of the yield portion, and the other end of the spring is connected to the bottom of the self-aligning sleeve, when the gas or the hydraulic oil enters the second sealed chamber through the through port, the volume of the second sealed chamber increases and drives the self-aligning sleeve to move axially downward, wherein the spring is compressed and accumulates elastic potential energy; when the gas or the hydraulic oil exits the second sealed chamber through the through port, the volume of the second sealed chamber becomes smaller, the spring releases elastic potential energy, and pushes the self-aligning sleeve to move axially upward.

5. A high-pressure sealed magnetic transmission device according to claim 3, characterized in that: The top of the support sleeve is in a shape with a high middle and low edges.

6. A high-pressure sealed magnetic transmission device according to claim 3, characterized in that: A self-aligning ball retainer is provided on the top of the support sleeve, and a plurality of self-aligning ball holes matching the self-aligning balls are radially provided on the inner wall of the self-aligning ball retainer. The diameter of the self-aligning ball hole is smaller than the diameter of the self-aligning ball, and the self-aligning ball hole is suitable for limiting the maximum displacement of the self-aligning ball inward movement in the radial direction.

7. A high-pressure sealed magnetic transmission device according to claim 2, characterized in that: The sealing isolation assembly also includes a mounting seat, which is fixedly connected to the frame. A mounting through hole matching the shell is provided on the mounting seat. The inner wall of the mounting through hole abuts against the outer wall of the shell. The inner wall of the mounting through hole protrudes radially inward to provide a limiting portion. The top of the limiting portion abuts against the bottom of the shell. The limiting portion is suitable for limiting the axial displacement of the shell.

8. The high-pressure sealed magnetic transmission device according to claim 1, characterized in that: A pressure-bearing cover plate is provided on the top of the isolation sleeve. The pressure-bearing cover plate is detachably connected to the centering assembly. The bottom of the pressure-bearing cover plate contacts the top of the isolation sleeve. The pressure-bearing cover plate is suitable for limiting the axial upward displacement of the isolation sleeve.

9. The high-pressure sealed magnetic transmission device according to claim 1, characterized in that: The outer wall of the active rotor assembly is provided with a spline, and the input shaft is provided with a spline groove matching the spline. The active rotor assembly is suitable for cooperating with the spline groove and transmitting torque through the spline, and the active rotor assembly can slide axially along the spline groove.

10. The high-pressure sealed magnetic transmission device according to claim 1, characterized in that: The sealing isolation assembly includes two centering assemblies, which are respectively arranged at the upper and lower ends of the isolation sleeve.

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