Corrosion-resistant high-pressure-resistant high-sealing magnetic powder brake and preparation method thereof

Abstract

The invention discloses a corrosion-resistant high-pressure-resistant high-sealing magnetic powder brake and a preparation method thereof, and relates to the technical field of magnetic powder brakes, the corrosion-resistant high-pressure-resistant high-sealing magnetic powder brake comprises a left end cover and a right end cover, through pipes are mounted in the middle of one side of the left end cover and the middle of the other side of the right end cover, and arc grooves are formed in the inner walls of the through pipes; first bearings are installed on the inner walls of the arc grooves, and rotor assemblies are installed on the inner walls of the first bearings and comprise output shafts and rotor bodies. Through the combination of the first rubber sealing ring, the second rubber sealing ring and the first sealing ring and the arrangement of the first rubber circular ring and the second rubber circular ring, multiple sealing design is formed, medium leakage and invasion of corrosive impurities can be effectively prevented, and through the arrangement of the first bearing, the first sealing ring and the second bearing, the sealing performance is improved. The use effect of the brake in a high-pressure environment is improved, it is guaranteed that the brake is stable and free of leakage, and then the safety and efficiency of the device during use are improved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic powder brakes, in particular to a corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake and a preparation method thereof. Background Art

[0002] The magnetic powder brake is based on the electromagnetic principle and uses magnetic powder to transmit torque. It has the characteristic that the excitation current and the transmitted torque are basically in a linear relationship. It can transmit a certain torque regardless of the slip. It has the advantages of fast response speed, simple structure, no pollution, no noise, no impact vibration, and energy saving. It is a multi-purpose, high-performance automatic control component.

[0003] The defects of the existing corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake are: 1. Patent document US09163679B1 discloses a magnetic powder brake device for a motor used in oil production. However, the magnetic powder brake device in the above document will have a technical problem of leakage when used in a high-pressure environment. 2. Patent document JP2016507040A discloses a magnetic powder brake, but the cooling effect of the magnetic powder brake in the above document is poor. After long-term use, it will cause technical problems such as braking errors due to high temperature; 3. Patent document JPH0962361A discloses a processing force feedback device, but the magnetic powder brake in the above document is noisy during use and cannot be used in a low-noise environment; 4. Patent document CN115875384A discloses a magnetic powder brake. However, the magnetic powder brake in the above document only adopts a single-layer sealing structure, which is difficult to block the invasion of external media for a long time and has a technical problem of low service life. Summary of the invention

[0004] The object of the present invention is to provide a corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake and a preparation method thereof, so as to solve the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake, comprising a left end cover and a right end cover, a through pipe is installed in the middle of one side of the left end cover and the middle of the other side of the right end cover, an arc groove is opened on the inner wall of the through pipe, a first bearing is installed on the inner wall of the arc groove, a rotor assembly is installed on the inner wall of the first bearing, and the rotor assembly includes an output shaft and a rotor body; A dynamic sealing assembly is installed at the other end of the inner wall of the through pipe, and the dynamic sealing assembly includes a first rubber sealing ring and a second rubber sealing ring, and the first sealing ring is installed on one side of the first rubber sealing ring and the other side of the second rubber sealing ring, and the outer wall of the first sealing ring is installed on the inner wall of the through pipe, and the second bearing is installed on the inner wall of the first sealing ring, and the outer side of the outer wall of the second bearing is installed on one side of the first rubber sealing ring and the other side of the second rubber sealing ring; A left protective ring is installed on the other side of the left end cover by bolts, and a right protective ring is installed on one side of the right end cover by bolts, and the left protective ring and the right protective ring are connected by bolts, and a first annular groove is provided on the periphery of one side of the left protective ring and the periphery of the other side of the right protective ring, and a first rubber ring is installed on the inner wall of the first annular groove, and one side of a group of the first rubber rings are squeezed and sealed with each other, and a group of second annular grooves are provided on the periphery of the other side of the left protective ring and the periphery of one side of the right protective ring, and a second rubber ring is installed on the inner wall of the second annular groove, and the other side of the second rubber ring on the periphery of the other side of the left protective ring is installed on the periphery of the other side of the left end cover, and one side of the second rubber ring on the periphery of one side of the right protective ring is installed on the periphery of one side of the right end cover.

[0006] Preferably, a plurality of first heat dissipation fins are installed on the periphery of one side of the left end cover and the periphery of the other side of the right end cover, and second heat dissipation fins are installed on the outer walls of the left protective ring and the right protective ring.

[0007] Preferably, a fixing ring groove is provided on one side of the inner wall of the left protective ring and the other side of the inner wall of the right protective ring, a sealing end cover is installed on the inner wall of the fixing ring groove by bolts, and a first rubber sealing pad is installed between the fixing ring groove and the sealing end cover, a fixing ring is installed in the middle of one side of the sealing end cover, a second sealing ring is installed on one end of the inner wall of the fixing ring, and the inner wall of the second sealing ring is installed on the outer wall of the output shaft.

[0008] Preferably, a powder isolation plate is installed on the other side of the sealing end cover, and the inner wall of the powder isolation plate is installed on the other side of the outer wall of the fixed ring. A first cavity is opened between the sealing end cover, the powder isolation plate and the fixed ring. A water inlet pipe and a drain pipe are respectively installed at both ends of one side of the sealing end cover, and solenoid valves are installed on the outer walls of the water inlet pipe and the drain pipe.

[0009] Preferably, a connecting ring is installed on one side of the sealing end cover, and the inner wall of the connecting ring is installed on the outer wall of the through pipe, and a second rubber sealing cushion is installed between the connecting ring and the through pipe.

[0010] Preferably, a second cavity is respectively opened inside the left end cover and the right end cover, and the interior of the second cavity is filled with sound insulation cotton. A group of through holes are opened on one side of the left end cover and the other side of the right end cover, and the other end of the through hole is opened on the inner wall of the second cavity, and the inner walls of a group of through holes are respectively installed on the outer walls of the water inlet pipe and the drain pipe.

[0011] Preferably, a left mounting groove is opened on one side of the left protective ring, and a right mounting groove is opened on the other side of the right protective ring, coils are installed on the inner walls of the left mounting groove and the right mounting groove, a wire is installed on the outer wall of the coil, and the other end of the wire passes through the left protective ring and the left end cover to install a power supply device.

[0012] Preferably, the inner walls of the left protective ring and the right protective ring are provided with magnetic powder cavities through the rotor body and the powder isolation plate, and magnetic powder is installed on the inner walls of the magnetic powder cavities.

[0013] Preferably, the preparation steps of the corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake are as follows: S1. Use corrosion-resistant and high-pressure-resistant stainless steel or alloy steel materials to prepare various metal parts in magnetic powder brakes, and use rubber materials as sealing materials; S2. According to the design drawings, use CNC machine tools to accurately process metal materials, obtain various metal parts in the magnetic powder brake, and ensure the surface finish and flatness of the metal parts; S3. Assemble all parts together according to the design requirements to ensure that the parts fit tightly and correctly; S4. Perform performance tests on the assembled magnetic powder brake, including sealing performance, corrosion resistance, pressure resistance and torque control accuracy.

[0014] Preferably, the step S3 further includes the following steps: S31, respectively completing the installation of the first bearing, the second bearing, the first rubber sealing ring, the second rubber sealing ring and the first sealing ring in the through pipe; S32, installing sealing end covers in the fixing ring grooves of the left protective ring and the right protective ring, adding a first rubber sealing cushion, and installing the left protective ring and the right protective ring on the left end cover and the right end cover respectively, and connecting the two; S33, opening a magnetic powder cavity on the inner wall of the left protective ring and the right protective ring through the rotor body and the powder isolation plate, and evenly filling the magnetic powder into the magnetic powder cavity, and installing the coil in the left installation groove and the right installation groove, and connecting the wire to the power supply device; S34, filling the second cavity with sound insulation cotton to reduce the noise during operation of the equipment; The step S4 also includes the following steps: S41. The test results show that the shell of the magnetic powder brake has no yield deformation or damage under a pressure of 20Mpa, the output shaft rotates flexibly, and there is no leakage at the sealing part; It can work continuously at 11Kw rated load in 2-5℃ environment, and the braking torque response time is ≤6s when the excitation current changes step by step.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention forms a multiple sealing design through the combination of the first rubber sealing ring, the second rubber sealing ring and the first sealing ring, and the arrangement of the first rubber ring and the second rubber ring, which can effectively prevent the leakage of the medium and the invasion of corrosive impurities. The arrangement of the first bearing, the first sealing ring and the second bearing is conducive to improving the use effect of the brake under high pressure environment, ensuring its stability without leakage, thereby improving the safety and efficiency of the device when in use; 2. The present invention is beneficial to improving the high-pressure protection effect and heat dissipation efficiency of the equipment by installing the first heat dissipation fins on the periphery of the left end cover and the right end cover, and the second heat dissipation fins on the outer wall of the left protective ring and the right protective ring. Then, by setting the powder isolation plate, the first cavity, the water inlet pipe, the drain pipe and the solenoid valve, cooling water is added to the first cavity through the water inlet pipe and then discharged through the drain pipe, thereby further improving the cooling effect, thereby ensuring that a stable operating state can be maintained even in a high-temperature working environment; 3. The second cavity provided in the present invention is conducive to further strengthening the sealing performance, achieving the effect of preventing the mutual interference between the internal and external environments, and the second cavity is filled with sound insulation cotton material, which is conducive to enhancing the sound insulation performance of the magnetic powder brake, and is conducive to the application scenario of low-noise environment, reducing the noise propagation effect when the equipment is running; 4. The modular design of the present invention is conducive to maintenance and replacement of parts, and the joints between the parts are respectively provided with multiple sealing structures, such as rubber sealing pads, sealing rings and powder isolation plates, which are conducive to blocking the intrusion of external media and also prevent the leakage of magnetic powder during the transmission process, thereby achieving the effect of extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the structure of the magnetic powder brake of the present invention; Figure 2 It is a front structural schematic diagram of the magnetic powder brake of the present invention; Figure 3 It is a schematic diagram of the appearance structure of the magnetic powder brake of the present invention; Figure 4 It is a schematic diagram of a cross-sectional view of the magnetic powder brake of the present invention from above; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at A in the middle; Figure 6 For the present invention Figure 4 Schematic diagram of the structure at B in the middle; Figure 7 It is a schematic diagram of the preparation process of the present invention.

[0017] In the figure: 1, left end cover; 2, right end cover; 3, through pipe; 4, arc groove; 5, first bearing; 8, first rubber sealing ring; 9, second rubber sealing ring; 10, first sealing ring; 11, second bearing; 12, left protective ring; 13, right protective ring; 14, first annular groove; 15, first rubber ring; 16, second annular groove; 17, second rubber ring; 18, first cooling fin; 19, second cooling fin; 20, fixed ring groove; 21, sealing end cover ; 22. First rubber sealing pad; 23. Fixed ring; 24. Powder isolation plate; 25. First cavity; 26. Water inlet pipe; 27. Drain pipe; 28. Solenoid valve; 29. ​​Connecting ring; 30. Second rubber sealing pad; 31. Through hole; 32. Left mounting groove; 33. Right mounting groove; 34. Coil; 35. Wire; 36. Output shaft; 37. Rotor body; 38. Magnetic powder cavity; 39. Magnetic powder; 40. Second sealing ring; 41. Sound insulation cotton; 42. Second cavity. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example 1: Please refer to Figure 1 , Figure 3 and Figure 4 , an embodiment of the present invention: a corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake, comprising a left end cover 1 and a right end cover 2, a through pipe 3 is installed in the middle of one side of the left end cover 1 and the middle of the other side of the right end cover 2, an inner wall of the through pipe 3 is provided with an arc groove 4, an inner wall of the arc groove 4 is installed with a first bearing 5, an inner wall of the first bearing 5 is installed with a rotor assembly, and the rotor assembly includes an output shaft 36 and a rotor body 37; A dynamic sealing assembly is installed at the other end of the inner wall of the through pipe 3, and the dynamic sealing assembly includes a first rubber sealing ring 8 and a second rubber sealing ring 9, and a first sealing ring 10 is installed on one side of the first rubber sealing ring 8 and the other side of the second rubber sealing ring 9, and the outer wall of the first sealing ring 10 is installed on the inner wall of the through pipe 3, and a second bearing 11 is installed on the inner wall of the first sealing ring 10, and the outer side of the outer wall of the second bearing 11 is installed on one side of the first rubber sealing ring 8 and the other side of the second rubber sealing ring 9; A left protective ring 12 is installed on the other side of the left end cover 1 by bolts, and a right protective ring 13 is installed on one side of the right end cover 2 by bolts, and the left protective ring 12 and the right protective ring 13 are connected by bolts, and a first annular groove 14 is provided on the periphery of one side of the left protective ring 12 and the periphery of the other side of the right protective ring 13, and a first rubber ring 15 is installed on the inner wall of the first annular groove 14, and one side of a group of first rubber rings 15 are mutually squeezed and sealed, and a group of second annular grooves 16 are provided on the periphery of the other side of the left protective ring 12 and the periphery of one side of the right protective ring 13, and a second rubber ring 17 is installed on the inner wall of the second annular groove 16, and the other side of the second rubber ring 17 on the periphery of the other side of the left protective ring 12 is installed on the periphery of the other side of the left end cover 1, and one side of the second rubber ring 17 on the periphery of one side of the right protective ring 13 is installed on the periphery of one side of the right end cover 2; Furthermore, through the combination of the first rubber sealing ring 8, the second rubber sealing ring 9 and the first sealing ring 10, and the arrangement of the first rubber ring 15 and the second rubber ring 17, a multiple sealing design is formed, which can effectively prevent medium leakage and the intrusion of corrosive impurities. The arrangement of the first bearing 5, the first sealing ring 10 and the second bearing 11 is conducive to improving the use effect of the brake under high-pressure environment, ensuring its stability and no leakage, thereby improving the safety and efficiency of the device when in use.

[0022] Example 2: Please refer to Figure 1 , Figure 2 and Figure 4 , an embodiment provided by the present invention: a plurality of first heat dissipation fins 18 are installed on the periphery of one side of the left end cover 1 and the periphery of the other side of the right end cover 2, and a second heat dissipation fin 19 is installed on the outer wall of the left protective ring 12 and the outer wall of the right protective ring 13; A powder isolation plate 24 is installed on the other side of the sealing end cover 21, and the inner wall of the powder isolation plate 24 is installed on the other side of the outer wall of the fixed ring 23. A first cavity 25 is opened between the sealing end cover 21, the powder isolation plate 24 and the fixed ring 23. An inlet pipe 26 and a drain pipe 27 are respectively installed at both ends of one side of the sealing end cover 21, and an electromagnetic valve 28 is installed on the outer wall of the inlet pipe 26 and the drain pipe 27. Furthermore, by installing a first cooling fin 18 on the periphery of the left end cover 1 and the right end cover 2, and a second cooling fin 19 on the outer wall of the left protective ring 12 and the right protective ring 13, it is beneficial to improve the high-pressure protection effect and heat dissipation efficiency of the equipment. By setting the powder isolation plate 24, the first cavity 25, the water inlet pipe 26, the drain pipe 27 and the solenoid valve 28, cooling water is added to the first cavity 25 through the water inlet pipe 26 and then discharged through the drain pipe 27, thereby further improving the cooling effect, thereby ensuring that a stable operating state can be maintained even in a high-temperature working environment.

[0023] Example 3: Please refer to Figure 4 and Figure 6 The present invention provides an embodiment in which a connecting ring 29 is installed on one side of the sealing end cover 21, and the inner wall of the connecting ring 29 is installed on the outer wall of the through pipe 3, and a second rubber sealing cushion 30 is installed between the connecting ring 29 and the through pipe 3; A second cavity 42 is respectively formed inside the left end cover 1 and the right end cover 2, and the interior of the second cavity 42 is filled with sound insulation cotton 41. A group of through holes 31 are formed on one side of the left end cover 1 and the other side of the right end cover 2, and the other ends of the through holes 31 are formed on the inner wall of the second cavity 42, and the inner walls of the group of through holes 31 are respectively mounted on the outer walls of the water inlet pipe 26 and the drain pipe 27; Furthermore, by opening the second cavity 42, the sealing performance is further enhanced, thereby preventing the internal and external environments from interfering with each other. The interior of the second cavity 42 is filled with sound insulation cotton 41 material, which is beneficial to enhancing the sound insulation performance of the magnetic powder brake and is beneficial for application scenarios in low-noise environments, thereby reducing the noise propagation effect during equipment operation.

[0024] Example 4: Please refer to Figure 4 and Figure 5 , an embodiment provided by the present invention: a fixed ring groove 20 is provided on one side of the inner wall of the left protective ring 12 and the other side of the inner wall of the right protective ring 13, a sealing end cover 21 is installed on the inner wall of the fixed ring groove 20 by bolts, and a first rubber sealing cushion 22 is installed between the fixed ring groove 20 and the sealing end cover 21, a fixed ring 23 is installed in the middle of one side of the sealing end cover 21, a second sealing ring 40 is installed at one end of the inner wall of the fixed ring 23, and the inner wall of the second sealing ring 40 is installed on the outer wall of the output shaft 36; A left mounting groove 32 is formed on one side of the left protective ring 12, and a right mounting groove 33 is formed on the other side of the right protective ring 13. Coils 34 are installed on the inner walls of the left mounting groove 32 and the right mounting groove 33, and a wire 35 is installed on the outer wall of the coil 34. The other end of the wire 35 passes through the left protective ring 12 and the left end cover 1 to install a power supply device. The inner walls of the left protective ring 12 and the right protective ring 13 are provided with a magnetic powder cavity 38 through the rotor body 37 and the powder isolation plate 24, and the inner wall of the magnetic powder cavity 38 is installed with magnetic powder 39; Furthermore, modular design facilitates maintenance and replacement of parts, and the joints between the parts are provided with multiple sealing structures, such as rubber sealing pads, sealing rings and powder isolation plates 24, which are helpful in blocking the intrusion of external media and preventing the leakage of magnetic powder 39 during the transmission process, thereby achieving the effect of extending the service life.

[0025] Example 5: Please refer to Figure 7 The present invention provides an embodiment: the preparation steps of the corrosion-resistant, high-pressure, and high-sealing magnetic powder brake are as follows: S1. Use corrosion-resistant and high-pressure-resistant stainless steel or alloy steel materials to prepare various metal parts in magnetic powder brakes, and use rubber materials as sealing materials; S2. According to the design drawings, use CNC machine tools to accurately process metal materials, obtain various metal parts in the magnetic powder brake, and ensure the surface finish and flatness of the metal parts; S3. Assemble all parts together according to the design requirements to ensure that the parts fit tightly and correctly; S4. Perform performance tests on the assembled magnetic powder brake, including sealing performance, corrosion resistance, pressure resistance and torque control accuracy; S3 also includes the following steps: S31, respectively completing the installation of the first bearing 5, the second bearing 11, the first rubber sealing ring 8, the second rubber sealing ring 9 and the first sealing ring 10 in the through pipe 3; S32, install the sealing end cover 21 in the fixing ring groove 20 of the left protective ring 12 and the right protective ring 13, add the first rubber sealing cushion 22, and install the left protective ring 12 and the right protective ring 13 on the left end cover 1 and the right end cover 2 respectively, and connect the two; S33, a magnetic powder cavity 38 is opened on the inner wall of the left protective ring 12 and the right protective ring 13 through the rotor body 37 and the powder isolation plate 24, and magnetic powder 39 is evenly filled into the magnetic powder cavity 38, and the coil 34 is installed in the left installation groove 32 and the right installation groove 33, and the wire 35 is connected to the power supply device; S34, filling the second cavity 42 with sound insulation cotton 41 to reduce the noise during operation of the device; S4 also includes the following steps: S41. The test results show that the shell of the magnetic powder brake has no yield deformation or damage under a pressure of 20 MPa, the output shaft 36 rotates flexibly, and there is no leakage at the sealing part; It can work continuously at 11Kw rated load in 2-5℃ environment, and the braking torque response time is ≤6s when the excitation current changes step by step.

[0026] Working principle: through the combination of the first rubber sealing ring 8, the second rubber sealing ring 9 and the first sealing ring 10, and the arrangement of the first rubber ring 15 and the second rubber ring 17, a multiple sealing design is formed, which can effectively prevent the leakage of the medium and the invasion of corrosive impurities. Then, through the arrangement of the first bearing 5, the first sealing ring 10 and the second bearing 11, it is beneficial to improve the use effect of the brake in a high-pressure environment, ensure the stability of the device without leakage, and thus improve the safety and efficiency of the device when in use. By installing the first heat dissipation fins 18 on the periphery of the left end cover 1 and the right end cover 2, and the second heat dissipation fins 19 on the outer wall of the left protective ring 12 and the right protective ring 13, it is beneficial to improve the high-pressure protection effect and heat dissipation efficiency of the equipment. Then, through the arrangement of the powder isolation plate 24, the first cavity 25, the water inlet pipe 26, the drain pipe 27 and the solenoid valve 28, the water is discharged to the first Cooling water is added to the cavity 25 and then discharged through the drain pipe 27, which further improves the cooling effect and ensures that a stable operating state can be maintained even in a high-temperature working environment. The second cavity 42 is opened to further enhance the sealing performance and prevent the internal and external environments from interfering with each other. The second cavity 42 is filled with sound insulation cotton 41 material, which is beneficial to enhance the sound insulation performance of the magnetic powder brake and is beneficial for low-noise environment application scenarios. It can reduce the noise propagation effect of the equipment during operation. The modular design is beneficial for maintenance and replacement of parts, and the joints between the parts are respectively provided with multiple sealing structures, such as rubber sealing pads, sealing rings and powder isolation plates 24, which are beneficial to block the intrusion of external media and prevent the leakage of magnetic powder 39 during transmission, thereby extending the service life.

[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake, comprising a left end cover (1) and a right end cover (2), characterized in that: A through pipe (3) is installed in the middle of one side of the left end cover (1) and in the middle of the other side of the right end cover (2); an arc groove (4) is provided on the inner wall of the through pipe (3); a first bearing (5) is installed on the inner wall of the arc groove (4); a rotor assembly is installed on the inner wall of the first bearing (5); the rotor assembly comprises an output shaft (36) and a rotor body (37); A dynamic sealing assembly is installed at the other end of the inner wall of the through pipe (3), the dynamic sealing assembly comprising a first rubber sealing ring (8) and a second rubber sealing ring (9), and a first sealing ring (10) is installed on one side of the first rubber sealing ring (8) and on the other side of the second rubber sealing ring (9), and the outer wall of the first sealing ring (10) is installed on the inner wall of the through pipe (3), a second bearing (11) is installed on the inner wall of the first sealing ring (10), and the outer side of the outer wall of the second bearing (11) is installed on one side of the first rubber sealing ring (8) and on the other side of the second rubber sealing ring (9); A left protective ring (12) is installed on the other side of the left end cover (1) by means of bolts, and a right protective ring (13) is installed on one side of the right end cover (2) by means of bolts, and the left protective ring (12) and the right protective ring (13) are connected by means of bolts, and a first annular groove (14) is provided on the periphery of one side of the left protective ring (12) and on the periphery of the other side of the right protective ring (13), and a first rubber ring (15) is installed on the inner wall of the first annular groove (14), and a group of the first rubber rings (15) are connected to each other. 5) are mutually squeezed and sealed, a group of second annular grooves (16) are formed on the periphery of the other side of the left protective ring (12) and the periphery of one side of the right protective ring (13), and a second rubber ring (17) is installed on the inner wall of the second annular groove (16), and the other side of the second rubber ring (17) on the periphery of the other side of the left protective ring (12) is installed on the periphery of the other side of the left end cover (1), and one side of the second rubber ring (17) on the periphery of one side of the right protective ring (13) is installed on the periphery of one side of the right end cover (1).

2. The corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake according to claim 1 is characterized in that: A plurality of first heat dissipation fins (18) are installed on the periphery of one side of the left end cover (1) and the periphery of the other side of the right end cover (2), and second heat dissipation fins (19) are installed on the outer walls of the left protective ring (12) and the right protective ring (13).

3. The corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake according to claim 1 is characterized in that: A fixing ring groove (20) is provided on one side of the inner wall of the left protective ring (12) and on the other side of the inner wall of the right protective ring (13); a sealing end cover (21) is mounted on the inner wall of the fixing ring groove (20) by means of bolts; a first rubber sealing cushion (22) is mounted between the fixing ring groove (20) and the sealing end cover (21); a fixing ring (23) is mounted in the middle of one side of the sealing end cover (21); a second sealing ring (40) is mounted on one end of the inner wall of the fixing ring (23); and the inner wall of the second sealing ring (40) is mounted on the outer wall of the output shaft (36).

4. The corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake according to claim 3 is characterized in that: A powder isolation plate (24) is installed on the other side of the sealing end cover (21), and the inner wall of the powder isolation plate (24) is installed on the other side of the outer wall of the fixed circular ring (23). A first cavity (25) is provided between the sealing end cover (21), the powder isolation plate (24) and the fixed circular ring (23). A water inlet pipe (26) and a drain pipe (27) are respectively installed through the two ends of one side of the sealing end cover (21), and a solenoid valve (28) is installed on the outer walls of the water inlet pipe (26) and the drain pipe (27).

5. The corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake according to claim 3 is characterized in that: A connecting ring (29) is installed on one side of the sealing end cover (21), and the inner wall of the connecting ring (29) is installed on the outer wall of the through pipe (3), and a second rubber sealing cushion (30) is installed between the connecting ring (29) and the through pipe (3).

6. The corrosion-resistant, high-pressure-resistant and highly sealed magnetic powder brake according to claim 1, characterized in that: A second cavity (42) is respectively provided inside the left end cover (1) and the right end cover (2), and the interior of the second cavity (42) is filled with sound insulation cotton (41). A group of through holes (31) is provided on one side of the left end cover (1) and the other side of the right end cover (2), and the other ends of the through holes (31) are provided on the inner wall of the second cavity (42), and the inner walls of the group of through holes (31) are respectively mounted on the outer walls of the water inlet pipe (26) and the drain pipe (27).

7. The corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake according to claim 1 is characterized in that: A left mounting groove (32) is formed on one side of the left protective ring (12), and a right mounting groove (33) is formed on the other side of the right protective ring (13). Coils (34) are mounted on the inner walls of the left mounting groove (32) and the right mounting groove (33). A wire (35) is mounted on the outer wall of the coil (34), and the other end of the wire (35) passes through the left protective ring (12) and the left end cover (1) to mount a power supply device.

8. The corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake according to claim 1 is characterized in that: The inner walls of the left protective ring (12) and the right protective ring (13) are provided with a magnetic powder cavity (38) through the rotor body (37) and the powder isolation plate (24), and magnetic powder (39) is installed on the inner wall of the magnetic powder cavity (38).

9. The method for preparing a corrosion-resistant, high-pressure, and high-sealing magnetic powder brake according to any one of claims 1 to 8, characterized in that: The preparation steps of the corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake are as follows: S1. Use corrosion-resistant and high-pressure-resistant stainless steel or alloy steel materials to prepare various metal parts in magnetic powder brakes, and use rubber materials as sealing materials; S2. According to the design drawings, use CNC machine tools to accurately process metal materials, obtain various metal parts in the magnetic powder brake, and ensure the surface finish and flatness of the metal parts; S3. Assemble all parts together according to the design requirements to ensure that the parts fit tightly and correctly; S4. Perform performance tests on the assembled magnetic powder brake, including sealing performance, corrosion resistance, pressure resistance and torque control accuracy.

10. The method for preparing a corrosion-resistant, high-pressure-resistant and high-sealing magnetic powder brake according to claim 9, characterized in that: The S3 also includes the following steps: S31, completing the installation of the first bearing (5), the second bearing (11), the first rubber sealing ring (8), the second rubber sealing ring (9) and the first sealing ring (10) in the through pipe (3); S32, installing a sealing end cover (21) in the fixing ring groove (20) of the left protective ring (12) and the right protective ring (13), adding a first rubber sealing cushion (22), and installing the left protective ring (12) and the right protective ring (13) on the left end cover (1) and the right end cover (2), respectively, and connecting the two; S33, a magnetic powder cavity (38) is opened on the inner wall of the left protective ring (12) and the right protective ring (13) through the rotor body (37) and the powder isolation plate (24), and magnetic powder (39) is evenly filled into the magnetic powder cavity (38), and a coil (34) is installed in the left installation groove (32) and the right installation groove (33), and a wire (35) is connected to a power supply device; S34, filling the second cavity (42) with sound insulation cotton (41) to reduce noise during operation of the device; The step S4 also includes the following steps: S41. The test results show that the shell of the magnetic powder brake has no yield deformation or damage under a pressure of 20 MPa, the output shaft (36) rotates flexibly, and there is no leakage at the sealing part; It can work continuously at 11Kw rated load in 2-5℃ environment, and the braking torque response time is ≤6s when the excitation current changes step by step.

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