High-pressure-resistant multi-stage magnetic medium sealing pressurizing device

Abstract

The invention discloses a high-pressure-resistant multi-stage magnetic medium sealing and pressurizing device which comprises a shell, a rotating shaft, a sealing assembly and a pressurizing assembly, two pole shoes are arranged at intervals in the axial direction of the rotating shaft, and a permanent magnet is clamped between the two pole shoes to form a first pressure cavity; the side, facing the sealed equipment, of the sealing assembly adjacent to the sealed equipment is a second pressure cavity, the pressurizing assembly comprises an air storage tank, a pressure feedback module, a pressurizing pipe and a pressure sensor, and the pressurizing pipe communicates with the air storage tank and comprises a first branch and a second branch which communicate with the first pressure cavity and the second pressure cavity; the pressure sensor comprises a first sensor and a second sensor which are used for detecting the first pressure cavity and the second pressure cavity; and the pressure feedback module is used for controlling the on-off of the branch. The high-pressure-resistant multi-stage magnetic medium sealing pressurizing device can ensure that the pressed value of the magnetic medium under each pole shoe is always smaller than the pressure-resistant value of the magnetic medium, and the loss of the magnetic medium in the pressurizing process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic medium sealing, in particular to a high-pressure-resistant multi-stage magnetic medium sealing and pressurizing device. Background Art

[0002] Magnetic media sealing technology utilizes a specific spatial distribution of magnetic induction intensity differences to confine the magnetic media within the sealing gap, effectively preventing leakage and flow of the sealed fluid, thereby achieving a seal. The development of high-end equipment is placing higher demands on the pressure resistance of magnetic media seals. The most common method for increasing this capability is to increase the number of pole pieces. To prevent the magnetic media from being swept away by high-energy airflow, higher pressure conditions inevitably increase the pressurization time. However, during prolonged pressurization, the magnetic media beneath the pole pieces on the high-pressure side is continuously breached and swept away by the airflow. This also results in a loss of magnetic media beneath the pole pieces on the high-pressure side, rendering this area incapable of performing its intended sealing function. This situation directly results in a significant lack of actual pressure resistance for the magnetic media seal, making it unable to meet the demands of demanding operating environments. Therefore, there is an urgent need to develop an effective and feasible high-pressure multi-stage magnetic media seal pressurization device to implement this technology and meet the high-pressure requirements of high-end equipment development.

[0003] No publicly available information exists regarding the technology behind high-pressure, multi-stage magnetic media seals and pressurization devices. However, the development of many high-end equipment places higher demands on the pressure resistance of magnetic media seals, making conventional magnetic media seal pressurization methods inadequate. Therefore, the development of a high-pressure, multi-stage magnetic media seal and pressurization device is urgently needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that, in response to the defects and shortcomings of the existing technology, a high-pressure-resistant multi-stage magnetic medium sealing and charging device is proposed. The high-pressure-resistant multi-stage magnetic medium sealing and charging device can construct an intelligent feedback system for pressure and charging in the pressure-resistant side space of any pole shoe. When the pressure value on the pressure side reaches the pressure resistance value of the magnetic medium, the feedback system can close the charging branch in time to ensure that the pressure value of the magnetic medium under each pole shoe is always less than its pressure resistance value, so that the magnetic medium under each pole shoe is not completely broken, thereby greatly reducing the loss of magnetic medium and improving the pressure resistance and reliability of the magnetic medium seal.

[0005] The high-pressure-resistant multi-stage magnetic medium sealing and charging device of the embodiment of the present invention comprises: an outer shell and a rotating shaft, the shell having an installation cavity, one end of the installation cavity is a sealing side connected to the sealed device, and the other end is an end cover side where a cover plate is provided, the rotating shaft extends into the installation cavity along the sealing side and is passed through the cover plate; a sealing component, the sealing component comprises two pole shoes and a permanent magnet, the two pole shoes are arranged on the outer periphery of the rotating shaft at intervals along the axial direction of the rotating shaft and are sealed with the inner peripheral surface of the shell, a sealing gap is formed between the inner peripheral surface of the pole shoe and the rotating shaft, the permanent magnet is clamped between the two pole shoes and is sealed with the inner peripheral surface of the shell, the permanent magnet and the two pole shoes constitute a first pressure chamber, and the side of the sealing component adjacent to the sealed device facing the sealed device is a second pressure chamber; a charging component, the charging component comprises an air storage tank, a pressure A force feedback module, a charging tube and a pressure sensor, one end of the charging tube is connected to the air storage tank, and the other end includes a first branch and a second branch respectively connected to the first pressure chamber and the second pressure chamber, the pressure sensor includes a first sensor and a second sensor respectively detecting the first pressure chamber and the second pressure chamber, the pressure feedback module is connected to the first branch, the second branch, the first sensor and the second sensor; the two pole shoes that enclose the first pressure chamber include a first proximal pole shoe adjacent to the sealed device and a first distal pole shoe relatively far away from the sealed device, when the detection value of the first sensor reaches the pressure resistance value of the sealing medium under the first distal pole shoe, the pressure feedback module controls the first branch to be disconnected; when the detection value of the second sensor reaches the pressure resistance value of the sealing medium under the adjacent pole shoe, the pressure feedback module controls the second branch to be disconnected.

[0006] The embodiment of the present invention provides a high-pressure multi-stage magnetic medium sealing and charging device, wherein the sealing component includes two pole shoes and a permanent magnet, the permanent magnet is sandwiched between the two pole shoes and forms a first pressure chamber with the two pole shoes, the side of the sealing component adjacent to the sealed device facing the sealed device is a second pressure chamber, the charging component includes an air storage tank, a pressure feedback module, a charging pipe and a pressure sensor, one end of the charging pipe is connected to the air storage tank, and the other end includes a first branch and a second branch respectively connected to the first pressure chamber and the second pressure chamber, the pressure sensor includes a first sensor and a second sensor respectively detecting the first pressure chamber and the second pressure chamber, the pressure feedback module is connected to the first branch, the second branch, the first sensor and the second sensor, the two pole shoes surrounding the first pressure chamber include a first proximal pole adjacent to the sealed device The shoe and the first distal pole shoe which is relatively far away from the sealed device, when the detection value of the first sensor reaches the withstand pressure value of the sealing medium under the first distal pole shoe, the pressure feedback module controls the first branch to be disconnected, and when the detection value of the second sensor reaches the withstand pressure value of the sealing medium under the adjacent pole shoe, the pressure feedback module controls the second branch to be disconnected. Thus, the charging component can construct an intelligent feedback system for pressure and charging in the pressure-bearing side space of any pole shoe. When the pressure value on the pressure-bearing side reaches the theoretical pressure value of the magnetic medium, the feedback system can close the charging branch in time to ensure that the actual pressure value of the magnetic medium under each pole shoe is always less than its theoretical pressure value, so that the magnetic medium under each pole shoe is not completely broken, which greatly reduces the loss of the magnetic medium and improves the pressure resistance and reliability of the magnetic medium seal.

[0007] In some embodiments, the sealing assemblies are multiple and spaced apart in the axial direction of the rotating shaft, and magnetic isolation rings are provided between adjacent sealing assemblies. The magnetic isolation rings and the two adjacent pole shoes constitute a third pressure chamber.

[0008] In some embodiments, the charging tube also includes a third branch connected to the third pressure chamber, the pressure sensor includes a third sensor for detecting the third pressure chamber, and the two pole shoes that surround the third pressure chamber include a second proximal pole shoe adjacent to the sealed device and a second distal pole shoe relatively far away from the sealed device. When the detection value of the third sensor reaches the pressure resistance value of the sealing medium under the second distal pole shoe, the pressure feedback module controls the third branch to disconnect.

[0009] In some embodiments, the first branch, the second branch and the third branch are respectively provided with a first electromagnetic throttle valve, a second electromagnetic throttle valve and a third electromagnetic throttle valve connected to the pressure feedback module; the outlet end of the gas storage tank is provided with a common throttle valve and a fourth pressure sensor.

[0010] In some embodiments, a first charging hole and a first detection hole are provided on radially opposite sides of the permanent magnet, the first charging hole is connected to the first branch, and the first sensor is provided at the first detection hole; and / or, a third charging hole and a third detection hole are provided on radially opposite sides of the magnetic isolation ring, the third charging hole is connected to the third branch, and the third sensor is provided at the third detection hole.

[0011] In some embodiments, a second charging hole and a second detection hole are provided on radially opposite sides of the housing of the sealed device, the second charging hole is connected to the second branch, and the second sensor is provided at the second detection hole.

[0012] In some embodiments, the shell includes an outer peripheral plate and a cover plate, the cover plate and the outer peripheral plate are sealed by a first sealing ring, and the rotating shaft is provided on the cover plate.

[0013] In some embodiments, the housing further includes an end plate opposite to the cover plate, and the end plate is sealed to the sealed device via a second sealing ring; the pole shoe is sealed to the housing via a third sealing ring.

[0014] In some embodiments, the rotating shaft is provided with bearings at both ends of its axial direction, and the magnetic isolation ring is provided between the bearing and the sealing assembly.

[0015] In some embodiments, a retaining spring is further sleeved on the outer periphery of the rotating shaft, and the mechanical bearing includes a proximal bearing adjacent to the sealed device and a distal bearing relatively far away from the sealing device, and the retaining spring is retained on the side of the distal bearing facing the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a high-pressure-resistant multi-stage magnetic medium sealing and pressing device according to an embodiment of the present invention.

[0017] Figure 2 yes Figure 1 Schematic diagram of the layout of the first electromagnetic throttle valve and the first sensor.

[0018] Figure 3 yes Figure 1 Schematic diagram of the layout of the third electromagnetic throttle valve and the third sensor.

[0019] Figure 4 This is a control flow chart of each throttle valve of the high-pressure multi-stage magnetic medium sealing and pressurizing device according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] Shell 1, peripheral plate 2, cover plate 3, rotating shaft 4, pole shoe 5, permanent magnet 6, magnetic isolation ring 7, mechanical bearing 8, sealed device 9, retaining ring 10, first branch 11, second branch 12, third branch 13, first electromagnetic throttle valve 14, second electromagnetic throttle valve 15, third electromagnetic throttle valve 16, first sensor 17, second sensor 18, third sensor 19, charging pipe 20, air storage tank 21, pressure feedback module 22, ordinary throttle valve 23, fourth pressure sensor 24, first sealing ring 25, second sealing ring 26, third sealing ring 27, first charging hole 28, first detection hole 29, third charging hole 30, third detection hole 31. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0023] like Figures 1-4 As shown, the high-pressure-resistant multi-stage magnetic medium sealing and pressing device according to an embodiment of the present invention includes a housing 1, a rotating shaft 4, a sealing component and a pressing component.

[0024] Specifically, the shell has an installation cavity, one end of the installation cavity is a sealing side connected to the sealed device 9, and the other end is an end cover side on which a cover plate 3 is provided. The rotating shaft 4 extends into the installation cavity along the sealing side and is passed through the cover plate 3. The sealing assembly includes two pole shoes 5 and a permanent magnet 6. The two pole shoes 5 are sleeved on the outer periphery of the rotating shaft 4 at an axial interval along the rotating shaft 4 and are sealed with the inner peripheral surface of the shell. A sealing gap is formed between the inner peripheral surface of the pole shoe 5 and the rotating shaft 4. The permanent magnet 6 is sandwiched between the two pole shoes 5 and is sealed with the inner peripheral surface of the shell. The permanent magnet 6 and the two pole shoes 5 form a first pressure chamber adjacent to the sealed The side of the sealing component of the device 9 facing the sealed device 9 is a second pressure chamber. The charging component includes an air storage tank 21, a pressure feedback module 22, a charging pipe 20 and a pressure sensor. One end of the charging pipe 20 is connected to the air storage tank 21, and the other end includes a first branch 11 and a second branch 12 respectively connected to the first pressure chamber and the second pressure chamber. The pressure sensor includes a first sensor 17 and a second sensor 18 for detecting the first pressure chamber and the second pressure chamber respectively. The pressure feedback module 22 is connected to the first branch 11, the second branch 12, the first sensor 17 and the second sensor 18.

[0025] Furthermore, the two pole shoes 5 that form the first pressure chamber include a first proximal pole shoe adjacent to the sealed device 9 and a first distal pole shoe relatively far away from the sealed device 9. When the detection value of the first sensor 17 reaches the pressure resistance value of the sealing medium under the first distal pole shoe, the pressure feedback module 22 controls the first branch 11 to disconnect. When the detection value of the second sensor 18 reaches the pressure resistance value of the sealing medium under the adjacent pole shoe 5, the pressure feedback module 22 controls the second branch 12 to disconnect.

[0026] It should be noted that the sealing assembly is not limited to a group. This embodiment takes a single group of sealing assemblies as an example to illustrate the technical solution. Specifically:

[0027] Before pressurization, the theoretical pressure value of the magnetic medium under each pole shoe is calculated according to the actual working conditions. When pressurization starts, the air storage tank 21 can inflate the first pressure chamber through the first branch 11, and the first sensor 17 can obtain the pressure value of the first pressure chamber in real time. Since the first pressure chamber is the pressure side space of the first distal pole shoe, the pressure value can be regarded as the pressure value of the magnetic medium under the first distal pole shoe. When the pressure value reaches the theoretical pressure value of the magnetic medium, the pressure feedback module 22 can close the first branch 11, thereby preventing the pressure from continuing to rise, so as to ensure that the pressure under the first distal pole shoe is within the range of 0.05. The actual air pressure that the magnetic medium is subjected to is always less than its theoretical pressure value, thereby preventing the magnetic sealing medium at the distal pole shoe from being completely broken. Similarly, the second pressure chamber is the pressure side space of the first proximal pole shoe, and the pressure value can be regarded as the pressure value of the magnetic medium under the first proximal pole shoe. When the pressure value reaches the theoretical pressure value of the magnetic medium, the pressure feedback module 22 can close the second branch 12, thereby preventing the pressure from continuing to rise, so as to ensure that the actual air pressure that the magnetic medium under the first proximal pole shoe is always less than its theoretical pressure value, thereby preventing the magnetic medium at the proximal pole shoe from being completely broken.

[0028] In other words, the pressurizing component of the present application can construct an intelligent feedback system of pressure and charging in the pressure side space of any pole shoe 5 to ensure that the actual pressure value of the magnetic medium under each pole shoe 5 is always less than its theoretical pressure value, thereby preventing the magnetic medium under each pole shoe 5 from being completely broken, greatly reducing the loss of the magnetic medium and improving the pressure resistance and reliability of the magnetic medium seal.

[0029] The high-pressure-resistant multi-stage magnetic medium sealing and charging device of the embodiment of the present invention, the sealing component includes two pole shoes 5 and a permanent magnet 6, the permanent magnet 6 is sandwiched between the two pole shoes 5 and forms a first pressure chamber with the two pole shoes 5, the side of the sealing component adjacent to the sealed device 9 facing the sealed device 9 is a second pressure chamber, the charging component includes an air storage tank 21, a pressure feedback module 22, a charging pipe 20 and a pressure sensor, one end of the charging pipe 20 is connected to the air storage tank 21, and the other end includes a first branch 11 and a second branch 12 respectively connected to the first pressure chamber and the second pressure chamber, and the pressure sensor includes a pressure sensor for detecting the pressure of the first pressure chamber and the second pressure chamber respectively. The first sensor 17 and the second sensor 18 of the pressure chamber, and the pressure feedback module 22 are connected to the first branch 11, the second branch 12, the first sensor 17 and the second sensor 18. The two pole shoes 5 that enclose the first pressure chamber include a first proximal pole shoe adjacent to the sealed device 9 and a first distal pole shoe relatively far away from the sealed device 9; when the detection value of the first sensor 17 reaches the pressure resistance value of the sealing medium under the first distal pole shoe, the pressure feedback module 22 controls the first branch 11 to disconnect, and when the detection value of the second sensor 18 reaches the pressure resistance value of the sealing medium under the adjacent pole shoe 5, the pressure feedback module 22 controls the second branch 12 to disconnect. Therefore, the charging component can construct an intelligent feedback system of pressure and charging in the pressure side space of any pole shoe 5. When the pressure value on the pressure side reaches the theoretical pressure value of the magnetic medium, the feedback system can close the charging branch in time to ensure that the actual pressure value of the magnetic medium under each pole shoe 5 is always less than its theoretical pressure value, thereby preventing the magnetic medium under each pole shoe 5 from being completely broken, greatly reducing the loss of the magnetic medium and improving the pressure resistance and reliability of the magnetic medium seal.

[0030] In addition, it can be understood that the present invention increases the pressure resistance of magnetic media sealing technology at the implementation level, reduces the error between the tested pressure resistance and the theoretical design pressure resistance, thereby reducing the design safety factor. The sealing performance does not need to rely on an increase in the number of pole shoes 5 designed, thereby reducing the volume and weight of the sealing structure.

[0031] Furthermore, there are multiple sealing assemblies arranged at intervals in the axial direction of the rotating shaft 4, and magnetic isolation rings 7 are provided between adjacent sealing assemblies. The magnetic isolation rings 7 and the two adjacent pole shoes 5 form a third pressure chamber.

[0032] It should be noted that multiple sealing components can form a multi-stage seal to further improve the sealing reliability, and the magnetic isolation ring 7 between two adjacent sealing components can play the role of assembly limit. Figure 1 As shown, two groups of sealing assemblies are arranged on the rotating shaft 4 at intervals.

[0033] Furthermore, if Figure 1 and Figure 3As shown, the charging tube 20 also includes a third branch 13 connected to the third pressure chamber. The pressure sensor includes a third sensor 19 for detecting the third pressure chamber. The two pole pieces 5 that enclose the third pressure chamber include a second proximal pole piece adjacent to the sealed device 9 and a second distal pole piece relatively far from the sealed device 9. When the detection value of the third sensor 19 reaches the pressure resistance value of the sealing medium under the second distal pole piece, the pressure feedback module 22 controls the third branch 13 to be disconnected. It can be understood that since the third pressure chamber is the pressure-bearing space on the second distal pole piece, this pressure value can be regarded as the pressure value of the magnetic medium under the second distal pole piece. When this pressure value reaches the theoretical pressure value of the magnetic medium, the pressure feedback module 22 can close the third branch 13, thereby preventing the pressure from continuing to rise. This ensures that the actual air pressure experienced by the magnetic medium under the second distal pole piece is always less than its theoretical pressure value, thereby preventing the magnetic sealing medium at the distal pole piece from being completely ruptured.

[0034] like Figure 1 As shown in the figure, the four pole shoes 5 are named as the first pole shoe, the second pole shoe, the third pole shoe and the fourth pole shoe in the direction gradually away from the sealed device 9, then the pressure side space of the first pole shoe is the second pressure chamber, and when the pressure value detected by the second sensor 18 reaches the theoretical pressure value of the magnetic medium under the first pole shoe, the pressure feedback module 22 controls the second branch 12 to be disconnected to ensure that the magnetic medium at this position is not completely broken; the pressure side space of the second pole shoe is the first pressure chamber in the lower end sealing assembly, and when the pressure value detected by the first sensor 17 reaches the theoretical pressure value of the magnetic medium under the second pole shoe, the pressure feedback module 22 controls the second branch 12 to be disconnected One branch 11 is disconnected to ensure that the magnetic medium at this position is not completely broken; the pressure side space of the third pole shoe is the third pressure chamber. When the pressure value detected by the third sensor 19 reaches the theoretical pressure value of the magnetic medium under the third pole shoe, the pressure feedback module 22 controls the third branch 13 to be disconnected to ensure that the magnetic medium at this position is not completely broken; the pressure side space of the fourth pole shoe is the first pressure chamber in the upper end sealing assembly. When the first sensor 17 detects that the pressure value reaches the theoretical pressure value of the magnetic medium under the fourth pole shoe, the pressure feedback module 22 controls the first branch 11 to be disconnected to ensure that the magnetic medium at this position is not completely broken.

[0035] It should be noted that the setting of the sealing components is not limited to two groups. The specific number can be determined according to actual needs. The charging feedback principle of multiple groups of sealing components remains unchanged and will not be repeated here.

[0036] In some embodiments, the first branch 11, the second branch 12 and the third branch 13 are respectively provided with a first electromagnetic throttle valve 14, a second electromagnetic throttle valve 15 and a third electromagnetic throttle valve 16 connected to the pressure feedback module 22; the outlet end of the gas storage tank 21 is provided with a common throttle valve 23 and a fourth pressure sensor 24. Figure 1For example, since two sets of sealing components are provided on the rotating shaft 4, the upper sealing component and the lower sealing component are each provided with a set of first electromagnetic throttle valve 14 and first sensor 17, which are sequentially arranged in the direction away from the sealed device as the second electromagnetic throttle valve 15 ( Figure 4 The fourth level electromagnetic throttle valve in the first electromagnetic throttle valve 14 ( Figure 2 The third electromagnetic throttle valve in the Figure 4 The second stage electromagnetic throttle valve) and the first electromagnetic throttle valve 14 ( Figure 4 The first-stage electromagnetic throttle valve in the

[0037] The theoretical pressure value of each pole shoe 5 is calculated according to the actual working conditions. If the actual working condition is 2np, the pressure resistance of the magnetic medium seal is designed to be 2anp, in which the safety factor a is taken into account, the number of sealing components is designed to be an, and the pressure resistance of one sealing component is 2p, then the pressure resistance of a pole shoe 5 can be obtained to be p. The number of pole shoes 5 is 2an, and the theoretical pressure of each pole shoe 5 is required to be p / a.

[0038] by Figure 1 As shown in the example of two sets of sealing components, at the beginning of charging, the first electromagnetic throttle valve 14, the second electromagnetic throttle valve 15 and the third electromagnetic throttle valve 16 are opened first, and finally the common throttle valve 23 is opened manually; when the first sensor 17 ( Figure 4 When the first-stage sensor in the pressure sensor detects that the pressure is p / a, the pressure feedback system controls the first electromagnetic throttle valve 14 ( Figure 4 The first-stage electromagnetic throttle valve in the Figure 4 When the second-stage sensor in the pressure sensor detects that the pressure is 2p / a, the pressure feedback system controls the third electromagnetic throttle valve 16 ( Figure 4 The second-stage electromagnetic throttle valve in the lower end is immediately closed; the first sensor 17 ( Figure 4 When the third-stage sensor in the pressure sensor detects that the pressure is 3p / a, the pressure feedback system controls the first electromagnetic throttle valve 14 ( Figure 4 The third-stage electromagnetic throttle valve in the Figure 4 When the fourth level sensor in the pressure sensor detects that the pressure is 4p / a, the pressure feedback system controls the second electromagnetic throttle valve 15 ( Figure 4 The fourth-stage electromagnetic throttle valve in the flowmeter is immediately closed; finally, the ordinary throttle valve 23 is manually closed to complete the pressurization.

[0039] It should be noted that the above embodiment has two sealing components, which is only for illustrating the pressurization method. For sealing magnetic media with higher pressure resistance, the commonly used means is to increase the number of sealing components, but the idea of ​​the pressurization method is the same. The pressurization method of the present invention is also applicable, and the more sealing components there are, the more significant the effect of the pressurization method of the present invention.

[0040] In some embodiments, as Figure 2 As shown, a first charging hole 28 and a first detection hole 29 are provided on opposite sides of the permanent magnet 6 in the radial direction. The first charging hole 28 is connected to the first branch 11 , and the first sensor 17 is provided at the first detection hole 29 .

[0041] Alternatively, as Figure 3 As shown, a third charging hole 30 and a third detection hole 31 are provided on radially opposite sides of the magnetic isolation ring 7 . The third charging hole 30 is connected to the third branch 13 , and the third sensor 19 is provided at the third detection hole 31 .

[0042] Optionally, a second pressure-charging hole and a second detection hole are provided on radially opposite sides of the housing 1 of the sealed device 9. The second pressure-charging hole communicates with the second branch 12, and the second sensor 18 is provided at the second detection hole. It will be appreciated that the inner cavity of the sealed device 9 is connected to the second pressure chamber, and that the second pressure-charging hole and the second detection hole are provided in the housing 1 of the sealed device 9 to enable charging and pressure detection of the second pressure chamber.

[0043] In some embodiments, as Figure 1 As shown, the housing includes an outer peripheral plate 2 and a cover plate 3 . The cover plate 3 and the outer peripheral plate 2 are sealed via a first sealing ring 25 , and the rotating shaft 4 is passed through the cover plate 3 .

[0044] Furthermore, the housing further includes an end plate opposite to the cover plate 3 , the end plate and the sealed device 9 are sealed via a second sealing ring 26 , and the pole shoe 5 and the housing are sealed via a third sealing ring 27 .

[0045] Furthermore, if Figure 1 As shown, the rotating shaft 4 is provided with bearings 8 at both ends of its axial direction, and a magnetic isolation ring 7 is provided between the bearing 8 and the sealing assembly.

[0046] Furthermore, if Figure 1 As shown, a retaining spring 10 is sleeved on the outer periphery of the rotating shaft 4 , and the mechanical bearing 8 includes a proximal bearing adjacent to the sealed device 9 and a distal bearing relatively far away from the sealing device. The retaining spring 10 is retained on the side of the distal bearing facing the cover plate 3 .

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0051] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0052] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high-pressure multi-stage magnetic medium sealing and pressurizing device, characterized in that: include: The housing and the rotating shaft are provided with an installation cavity, one end of the installation cavity is a sealing side connected to the sealed device, and the other end is an end cover side provided with a cover plate, and the rotating shaft extends into the installation cavity along the sealing side and is provided on the cover plate; A sealing assembly, the sealing assembly comprising two pole shoes and a permanent magnet, the two pole shoes being sleeved on the outer circumference of the rotating shaft at intervals along the axial direction of the rotating shaft and being sealed with the inner circumferential surface of the housing, a sealed gap being formed between the inner circumferential surface of the pole shoes and the rotating shaft, the permanent magnet being sandwiched between the two pole shoes and being sealed with the inner circumferential surface of the housing, the permanent magnet and the two pole shoes forming a first pressure chamber, and a side of the sealing assembly adjacent to the sealed device facing the sealed device being a second pressure chamber; a charging assembly, the charging assembly comprising an air storage tank, a pressure feedback module, a charging pipe, and a pressure sensor, one end of the charging pipe being connected to the air storage tank, and the other end comprising a first branch and a second branch respectively connected to the first pressure chamber and the second pressure chamber, the pressure sensor comprising a first sensor and a second sensor respectively detecting the first pressure chamber and the second pressure chamber, the pressure feedback module being connected to the first branch, the second branch, the first sensor, and the second sensor; The two pole shoes that enclose the first pressure chamber include a first proximal pole shoe adjacent to the sealed device and a first distal pole shoe relatively far from the sealed device. When the detection value of the first sensor reaches the withstand pressure value of the sealing medium under the first distal pole shoe, the pressure feedback module controls the first branch to be disconnected. When the detection value of the second sensor reaches the pressure resistance value of the sealing medium under the adjacent pole shoe, the pressure feedback module controls the second branch to be disconnected.

2. The high-pressure multi-stage magnetic medium sealing and pressurizing device according to claim 1 is characterized in that: The sealing components are multiple and spaced apart in the axial direction of the rotating shaft. A magnetic isolation ring is provided between adjacent sealing components. The magnetic isolation ring and the two adjacent pole shoes form a third pressure chamber.

3. The high-pressure multi-stage magnetic medium sealing and pressurizing device according to claim 2, characterized in that: The charging tube also includes a third branch connected to the third pressure chamber, the pressure sensor includes a third sensor for detecting the third pressure chamber, the two pole shoes surrounding the third pressure chamber include a second proximal pole shoe adjacent to the sealed device and a second distal pole shoe relatively far away from the sealed device, and when the detection value of the third sensor reaches the pressure resistance value of the sealing medium under the second distal pole shoe, the pressure feedback module controls the third branch to disconnect.

4. The high-pressure-resistant multi-stage magnetic medium sealing and pressurizing device according to claim 3, characterized in that: The first branch, the second branch and the third branch are respectively provided with a first electromagnetic throttle valve, a second electromagnetic throttle valve and a third electromagnetic throttle valve connected to the pressure feedback module; the outlet end of the gas storage tank is provided with a common throttle valve and a fourth pressure sensor.

5. The high-pressure multi-stage magnetic medium sealing and pressurizing device according to claim 3, characterized in that: A first charging hole and a first detection hole are provided on radially opposite sides of the permanent magnet, the first charging hole is connected to the first branch, and the first sensor is provided at the first detection hole; and / or a third charging hole and a third detection hole are provided on radially opposite sides of the magnetic isolation ring, the third charging hole is connected to the third branch, and the third sensor is provided at the third detection hole.

6. The high-pressure-resistant multi-stage magnetic medium sealing and pressurizing device according to claim 3, characterized in that: A second charging hole and a second detection hole are provided on radially opposite sides of the housing of the sealed device. The second charging hole is connected to the second branch, and the second sensor is provided at the second detection hole.

7. The high-pressure-resistant multi-stage magnetic medium sealing and pressurizing device according to claim 1, characterized in that: The shell includes an outer peripheral plate and a cover plate. The cover plate and the outer peripheral plate are sealed by a first sealing ring. The rotating shaft is arranged on the cover plate.

8. The high-pressure multi-stage magnetic medium sealing and pressurizing device according to claim 7, characterized in that: The housing further comprises an end plate opposite to the cover plate, and the end plate is sealedly connected to the sealed device via a second sealing ring; the pole shoe is sealedly connected to the housing via a third sealing ring.

9. The high-pressure multi-stage magnetic medium sealing and pressurizing device according to claim 1, characterized in that: The rotating shaft is provided with bearings at both ends of its axial direction, and the magnetic isolation ring is provided between the bearing and the sealing assembly.

10. The high-pressure multi-stage magnetic medium sealing and pressurizing device according to claim 9, characterized in that: A retaining spring is also sleeved on the outer periphery of the rotating shaft. The mechanical bearing includes a proximal bearing adjacent to the sealed device and a distal bearing relatively far away from the sealing device. The retaining spring is retained on the side of the distal bearing facing the cover plate.

Images