A bearing bush magnetic circuit integrated structure with radial and axial composite vortex suppression slots

Abstract

This invention belongs to the field of rotating machinery bearing engineering and magnetic circuit design, and discloses an integrated magnetic circuit structure for a bearing bush with radial and axial composite vortex suppression slots. The partitioned magnetic permeable blocks are embedded in the bearing bush body in a ring-shaped multi-sector array, symmetrically arranged axially between the left and right end faces of the bearing bush body; the vortex suppression slots are arranged at equal intervals along the circumference of the bearing bush body; partitioned water channels are respectively set on the back side of each partitioned magnetic permeable block; the compliant thin-walled region is a liquid film region set between the bearing bush body and the partitioned magnetic permeable blocks; the magnetic flux converging window is a magnetic passage region with low magnetic resistance inside the bearing bush body, and each partitioned magnetic permeable block forms a corresponding magnetic flux converging window, distributed inside the bearing bush body on the back side of the partitioned magnetic permeable blocks; the adjustable shielding plate is arranged parallel to the surface of the bearing bush body in the axial central region of the bearing bush body.

Description

Technical Field

[0001] This invention belongs to the field of rotating machinery bearing engineering and magnetic circuit design, and relates to an integrated magnetic circuit structure for bearing bushes with radial and axial composite vortex suppression slots. Background Technology

[0002] Bearings are core supporting components of various marine facilities and ship equipment. Their lubrication characteristics, service life, and dynamic stability directly affect the safety and reliability of the equipment. Among them, water-lubricated and magnetic-water composite bearings are widely used in ship propulsion, pumping, and clean energy equipment due to their advantages of superior environmental friendliness and low maintenance costs. The bearing shells of these bearings can form a hydrostatic or hydrodynamic water lubrication film with the liquid environment to transfer loads by utilizing their own structural and material properties. Combined with built-in or external magnetic fields to provide preload and stiffness compensation, they effectively reduce frictional losses between the journal and the bearing shell, ensuring efficient and stable operation of the system. Therefore, the rational design of the bearing shells is crucial.

[0003] However, traditional bearing structures have several key problems affecting bearing performance: First, they are mostly homogeneous substrates or simply embedded magnetic components, and the magnetic circuit design cannot precisely control the magnetic flux distribution in the bearing air gap, resulting in significant local saturation and edge effects. Second, the bearing body is prone to generating strong circumferential or axial eddy currents under the action of time-varying and rotating magnetic fields, leading to eddy current losses and temperature rise, exacerbating thermal instability, and potentially inducing magnet demagnetization and aging failure of the bearing surface material, significantly shortening bearing life. Third, the magnetic-fluid-structure interaction effect is not fully considered, resulting in uneven liquid film thickness distribution, increased vibration, and damage to load-bearing stability. Fourth, the cooling circuit and the arrangement of the magnetic inserts are mutually isolated, resulting in long heat transfer paths and delayed heat dissipation, further worsening the frictional state between the journal and the bearing.

[0004] Therefore, the bearing design industry urgently needs an integrated bearing magnetic circuit design solution: This solution must be based on ensuring the core performance of the magnetic field, and under the premise of ensuring stable magnetic flux focusing effect and magnetic stiffness meeting the usage requirements, effectively cut off the closed eddy current loop formed inside the equipment by optimizing the structural layout, designing a near-source heat dissipation scheme so that the heat generated by the eddy current can be quickly removed near the generation area, and also integrate the conformal structure and working surface microstructure design to achieve uniform distribution of lubricating film thickness and significantly reduce the vibration amplitude during equipment operation, improve overall operational stability, and ultimately achieve the core goal of efficient, reliable and long-life operation of the equipment. Summary of the Invention

[0005] This invention aims to provide an integrated magnetic circuit structure for bearing bushes with radial and axial composite eddy current suppression slots. Through the integrated magnetic circuit structure design, the designable distribution of the magnetic flux density B(θ,z) inside the bearing bush and the effective compression of the peak-valley difference can be achieved. By cutting off the circumferential and axial eddy current loops through radial through slots and axial semi-through or through slots, eddy current losses and local heat generation are significantly reduced. By adjusting the liquid film thickness according to the thin wall layer, the bearing pressure bearing stability is improved. At the same time, relying on the partitioned water channels and the partitioned magnetic permeable block embedding structure including dovetail grooves and micro preload springs, the comprehensive performance goals of efficient cooling, low pressure drop water channel design and maintainable assembly are taken into account.

[0006] The technical solution of this invention:

[0007] An integrated magnetic circuit structure for a bearing bush with radial and axial composite vortex suppression slots includes a bearing bush body, partitioned magnetic permeable blocks, vortex suppression slots, partitioned water channels, compliant thin-walled regions, magnetic flux convergence windows, and adjustable shielding sheets.

[0008] The partitioned magnetic permeable blocks are embedded in the bearing body in a ring-shaped multi-sector array and are symmetrically arranged between the left and right end faces of the bearing body along the axial direction.

[0009] The vortex-suppressing slots include two types: radial through slots and axial semi-through slots or axial through slots, arranged at equal intervals of 4 to 24 along the circumference of the bearing body; the radial projections of the two types of vortex-suppressing slots do not overlap, and the circumferential interval angle between adjacent vortex-suppressing slots of the same type is 25% to 75% of the corresponding vortex-suppressing slot pitch;

[0010] The partitioned water channels are respectively set on the back side of each partition magnetic permeable block and are arranged in an arc shape or curve. Each partitioned water channel has an independent fluid outlet and fluid inlet interface, or the partitioned water channels are connected in series to form a whole. According to the actual heating conditions of the bearing, the partitioned water channels are separated along the axial direction and arranged in parallel. The shortest thermal path L between the center of the partitioned water channel and the back side of the partition magnetic permeable block is no more than 3mm, and the Reynolds number Re of the fluid in the partitioned water channel is controlled within the range of 200 to 1500.

[0011] The compliant thin-walled region is a liquid film region located between the bearing body and the partitioned magnetic permeable block. Its circumferential thickness is distributed as a quadratic function or a piecewise linear distribution with respect to the circumferential deflection angle θ of the liquid film from the central axis of the partitioned magnetic permeable block. The compliant thin-walled region meets the compliance characteristic requirement: for every 1 kPa change in liquid film pressure, the absolute value of the deformation generated by the compliant thin-walled region is not less than 0.05 μm.

[0012] The magnetic flux converging window is a magnetic passage area inside the bearing body. Each partition magnetic permeable block forms a corresponding magnetic flux converging window, which is mainly distributed inside the bearing body on the back side of the partition magnetic permeable block.

[0013] The adjustable shield is arranged parallel to the surface of the bearing body and in the axial center region of the bearing body. Its installation position is adjusted by a spiral fine adjuster set in the middle of the adjustable shield to achieve radial offset adjustment within the range of 0 to 1.0 mm, which is used to fine adjust the peak value and peak-valley difference of the circumferential-axial magnetic flux density distribution. The specific structure of the spiral fine adjuster is flexibly determined according to the actual working conditions.

[0014] The bearing body has a dovetail groove machined inside, and the partitioned magnetic guide block is fitted into the dovetail groove and radially fixed. A micro preload spring is provided between the mating surfaces of the dovetail groove and the partitioned magnetic guide block. The micro preload spring applies a continuous radial and circumferential preload force to the partitioned magnetic guide block to achieve precise positioning and anti-loosening fixation of the partitioned magnetic guide block, while meeting its replaceable assembly requirements.

[0015] The bearing body is made of composite materials such as PEEK, PI, ceramic, stainless steel, or the above; the zoned magnetic permeability inserts are made of soft magnetic composite powder cores, electrical steel laminations, or pure iron, with a relative permeability μ. r The range is 200 to 6000.

[0016] The inner working surface of the bearing body is provided with microstructured grooves and a micropore hydrostatic array; wherein the depth of the microstructured grooves is 5-40 μm, and the included angle between the two walls of the microstructured grooves is 20-45°; the pore diameter of the micropores is 0.08-0.30 mm, and the pore density of the micropores is 5-25 pores / cm². 2 It adopts an independent throttling layout in zones 2 to 8.

[0017] The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots can be used in conjunction with an external permanent magnet ring or electromagnetic coil. After the magnetic flux density distribution is calibrated on site, it can be quickly fine-tuned by adjusting the bias of the adjustable shielding sheet.

[0018] The beneficial effects of this invention are:

[0019] 1. The present invention adopts a vortex-suppressing slot structure that combines radial through slots and axial semi-through slots or through slots, combined with a circumferential interval angle misalignment design with a pitch ratio of 25%~75%, and in conjunction with the partitioned magnetic permeable blocks embedded in the ring array, which can effectively cut off the circumferential and axial vortex loops, reducing vortex loss by more than 30% compared with the non-composite slot structure, and significantly suppressing the temperature rise problem caused by vortex.

[0020] 2. This invention optimizes the magnetic circuit design by using partitioned magnetic permeable blocks and correspondingly set magnetic flux converging windows. Combined with an adjustable shielding sheet that can achieve radial offset adjustment from 0 to 1.0 mm, it can precisely control the air gap magnetic flux density distribution, effectively compress the magnetic flux peak-valley difference, and suppress the magnetic circuit saturation effect. At the same time, by adapting to the adaptive characteristics of the thin-walled region, and in conjunction with the microstructured grooves and microporous hydrostatic array on the inner circular working surface of the bearing bush, it can effectively homogenize the liquid film thickness, significantly reduce bearing operating vibration, and greatly improve the bearing load stability and operational reliability.

[0021] 3. This invention constructs a magnetic-thermal-fluid synergistic control system by setting partitioned water channels adjacent to the back side of each partitioned magnetic permeable block; the shortest thermal path L between the partitioned water channel and the heat source of the magnetic permeable block is no more than 3mm, and the Reynolds number Re of the fluid in the water channel can be controlled within the range of 200 to 1500. It can achieve near-source efficient heat dissipation while taking into account the low pressure drop of the flow channel, thereby reducing the bearing operating temperature rise by ≥10%, and thus significantly reducing the risk of magnet demagnetization and bearing material aging, effectively extending the service life of the equipment.

[0022] 4. The present invention adopts a modular assembly structure with dovetail groove fitting and micro pre-tightening spring pre-tightening. The partitioned magnetic guide block can achieve precise positioning, anti-loosening fixation and convenient replacement. It has excellent manufacturability, assembly flexibility and maintenance convenience, and can be adapted to the design and processing needs of multi-specification bearing products. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure and coordinate system (including the air gap (g));

[0024] Figure 2 This is a schematic diagram of the cross-section of the waterway in the zone;

[0025] Figure 3 It conforms to the circumferential thickness distribution curve of the thin-walled region;

[0026] Figure 4 This is a diagram of the adjustable shielding plate and the spiral fine-tuning mechanism;

[0027] Figure 5 This is a diagram showing the dovetail tenon + micro-preload spring limiting structure and its replacement process;

[0028] In the figure: 1-Bearing body; 2-Divided magnetic permeable insert; 3-Radial through-slot; 4-Axial semi-through or through-slot; 5-Divided water channel; 6-Compliant thin-walled area; 7-Magnetic flux convergence window; 8-Adjustable shield; 9-Screw fine adjuster; 10-Dovetail tenon; 11-Micro preload spring; 12-Microstructure groove; 13-Microporous hydrostatic array; 14-Fluid interface; 15-Working air gap. Detailed Implementation

[0029] The specific embodiments of the present invention are further described below with reference to the accompanying drawings and technical solutions.

[0030] An integrated magnetic circuit structure for a bearing bush with radial and axial composite vortex-suppressing slots includes a bearing bush body 1, partitioned magnetic permeable blocks 2, vortex-suppressing slots, partitioned water channels 5, compliant thin-walled regions 6, magnetic flux converging windows 7, and adjustable shielding sheets 8. The inner circular working surface of the bearing bush body 1 is also provided with microstructured grooves 12 and microporous hydrostatic arrays 13. The structural design and material selection of each part are detailed as follows:

[0031] The bearing body 1 is made of PEEK, PI, ceramic, stainless steel or composite materials of the above materials, with stainless steel or PEEK-metal composite materials preferred. The inner cavity of the bearing body 1 needs to be machined with a mounting surface and a dovetail groove 10. The mounting surface is used to achieve precise positioning and assembly of each component, and the dovetail groove 10 provides a reliable mounting connection base for the partitioned magnetic guide block 2, ensuring the radial stability of the partitioned magnetic guide block 2 after assembly.

[0032] The partitioned magnetic permeability block 2 uses a soft magnetic composite powder core, electrical steel laminations, or pure iron, with a relative permeability μ r The value ranges from 200 to 6000, and it can be used in conjunction with vortex-suppressing slots to suppress vortex losses.

[0033] The vortex suppression slots include two types: radial through slots 3 and axial semi-through slots or through slots. 4 to 24 slots are evenly spaced along the circumference of the bearing body 1. In a preferred embodiment, the width of the radial through slot 3 is 0.2 to 1.2 mm, and the depth of the axial semi-through slot is 0.3 to 1.5 mm. Taking n=12 as an example, the radial projections of the two types of vortex suppression slots do not overlap. The circumferential interval angle between adjacent vortex suppression slots of the same type is 25% to 75% of the corresponding vortex suppression slot pitch, preferably set to 50% (which can be optimized within a limited range as needed). This staggered design can synergistically cut off the circumferential and axial vortex loops, maximizing the vortex suppression effect.

[0034] The partitioned water channels 5 are respectively set on the back side of each partitioned magnetic guide block 2, in an arc shape or an arc shape, and can be arranged in a ring or arc series-parallel layout. Each partitioned water channel 5 can be set with an independent fluid outlet and fluid inlet, or can be connected in series as a whole, which can realize the uniform distribution of cooling fluid and ensure that all heat-generating areas are fully covered by cooling. The shortest thermal path L between the center of the partitioned water channel 5 and the back side of the partitioned magnetic guide block 2 is no more than 3mm. The Reynolds number of the fluid in the partitioned water channel 5 is controlled within the range of 200 to 1500. While ensuring heat exchange efficiency, pressure drop control is also taken into account, which can quickly remove the heat generated during operation and ensure the thermal stability of the equipment.

[0035] The compliant thin-walled region 6 is a liquid film region located between the bearing body 1 and the partitioned magnetic permeable block 2. Its circumferential thickness follows a quadratic function distribution or a piecewise linear distribution with respect to the circumferential deflection angle θ of the liquid film from the central axis of the partitioned magnetic permeable block 2. It must meet the compliance characteristic requirement: for every 1 kPa change in liquid film pressure, the absolute value of the deformation generated by the compliant thin-walled region 6 is not less than 0.05 μm. In a preferred embodiment, the thickness t of the compliant thin-walled region 6 is... s =0.3~2.0mm, axial width w s =3~15mm, adopting a quadratic distribution design, the thickness distribution satisfies the formula t s (θ)=t0+a (θ-θ0) 2 , where t s (θ) is the actual thickness of the conforming thin-walled region 6 at the circumferential deflection angle θ, t0 and θ0 are the reference thickness and reference angle of the conforming thin-walled region 6 at the center position, and a is a constant coefficient; this structure gives the conforming thin-walled region 6 good flexible adjustment capability, which can adaptively adjust the liquid film thickness and improve load-bearing stability.

[0036] The magnetic flux converging window 7 is the magnetic passage area inside the bearing body 1. Each partition magnetic permeable block 2 forms a corresponding magnetic flux converging window 7, which is distributed inside the bearing body 1 on the back side of the partition magnetic permeable block 2. In a preferred embodiment, the magnetic flux converging window 7 and the partition magnetic permeable block 2 are aligned and can effectively converge the magnetic flux, so as to achieve a designable distribution of the air gap magnetic flux density.

[0037] The adjustable shield 8 is arranged parallel to the surface of the bearing body 1 in the axial center area of ​​the bearing body 1. Its installation position is adjusted by the centrally located spiral fine adjuster 9, which can achieve radial offset adjustment within the range of 0 to 1.0 mm. The adjustable shield 8 is preferably made of non-magnetic stainless steel or polymer composite material with a thickness of 0.1 to 0.8 mm. The spiral fine adjuster 9 preferably has a step accuracy of ≤0.05 mm and a hysteresis of ≤0.2°. By finely adjusting the position of the adjustable shield 8, the peak value of magnetic induction intensity can be precisely controlled, and the magnetic flux distribution can be further optimized.

[0038] The inner working surface of the bearing body 1 is provided with microstructured grooves 12 and micropore hydrostatic array 13; wherein the depth of the microstructured grooves 12 is 5-40μm, the included angle between the two walls is 20-45°, and spiral grooves, herringbone grooves or composite groove structures are preferred, with a depth of 10-30μm and an included angle of 25°-35°. The microstructured grooves 12 can guide the flow of lubricating water and improve the film-forming ability and stability of the water lubrication film; the pore diameter of the micropores is 0.08-0.30mm, and the pore density is 5-25 pores / cm². 2 It adopts an independent throttling arrangement of 2 to 8 zones, and preferably has a micropore diameter of 0.10 to 0.20 mm and a pore density of 8 to 12 pores / cm². 2It adopts a 6-zone independent throttling design. The independent throttling structure can achieve precise control of static pressure in each zone, improve the uniformity of liquid film thickness, and adapt to different working conditions and load requirements.

[0039] A bearing magnetic circuit integrated structure with radial and axial composite vortex suppression slots adopts modular manufacturing and precision assembly technology, the specific process of which is as follows:

[0040] S1. Pre-machining of bearing body 1: The inner cavity of bearing body 1 is machined by turning and milling to ensure the dimensional accuracy and surface roughness of the inner cavity; then the dovetail tenon 10 and the vortex-suppressing slot blank are machined by wire cutting process to lay the foundation for subsequent assembly and vortex-suppressing structure forming.

[0041] S2. Preparation of partitioned magnetic permeable insert 2: Select the corresponding process according to the material type. After the electrical steel lamination is laminated and insulated, it is pressed into shape. The soft magnetic powder core is formed by powder core sintering process. After forming, the end face of the partitioned magnetic permeable insert 2 is ground to ensure the parallelism and flatness of the end face and improve the magnetic permeability.

[0042] S3, Partitioned Water Channel 5 Manufacturing: CNC machining, laser processing or additive manufacturing process is used to precisely align with the back or sides of the partitioned magnetic inductance block 2 to ensure that the shortest heat path L from the heating center is ≤3mm; after forming, the interface is sealed by cap welding or screwing to ensure that the circuit is leak-free and the water flow is uniform, which is suitable for Re=200~1500 working conditions.

[0043] S4. Microstructure and hydrostatic hole processing on the working surface: Laser processing, micro-milling or electrical discharge machining is used to process the pre-set microstructure grooves 12 (spiral grooves, fishbone grooves, etc.) and micro-hole hydrostatic array 13 on the working surface of the bearing body 1 to ensure the dimensional accuracy of the microstructure and the conductivity of the microhole.

[0044] S5. Assembly of the spiral fine-tuning mechanism and the adjustable shield 8: Assemble the fine-tooth screw and the anti-rotation structure to form the spiral fine-tuning mechanism, and then install the adjustable shield 8; After assembly, check the stepping accuracy and backlash of the spiral fine-tuning mechanism to ensure that the design requirements are met.

[0045] S6. Overall Assembly: First, install the partitioned magnetic guide block 2 using the dovetail groove 10 and the micro pre-tightening spring 11 to ensure that the partitioned magnetic guide block 2 is firm and accurately positioned; then install the adjustable shielding plate 8 and adjust it to the initial offset position; then install the cooling and water supply connectors to ensure that the pipeline is unobstructed; finally, perform whole-machine sealing treatment to prevent leakage of working medium.

[0046] S7. Fine-tuning and Inspection: Perform geometric accuracy inspection on the assembled bearing body 1 to ensure that the positional and dimensional tolerances of each component meet the standards; perform insulation withstand voltage test (with withstand voltage ≥1kV required); test the withstand voltage performance and leakage of the cooling circuit to ensure the normal operation of the cooling system; and complete the flow resistance calibration to provide data support for working condition matching.

[0047] Calibration and debugging:

[0048] To ensure the bearing performance meets the standards, it is necessary to calibrate the magnetic field, film thickness / vibration, and temperature rise / eddy current, and optimize the parameters through fine-tuning. The specific operations are as follows:

[0049] Magnetic field calibration: Hall array sensors were used for detection. The sensor arrangement met the requirements of ≥12 points in the circumference and 3 layers in the axis. The distribution of air gap magnetic flux density B(θ,z) was measured, and the peak value and peak-valley difference of magnetic induction intensity were recorded to provide data basis for subsequent fine adjustment.

[0050] Film thickness / vibration calibration: The distribution data of liquid film thickness h(θ) is collected using capacitive or eddy current sensors; the root mean square value (RMS) of the vibration is measured by a triaxial accelerometer to evaluate the operational stability.

[0051] Temperature rise / eddy current calibration: Thermocouples and thermal imagers are used to measure the temperature change ΔT during operation to evaluate the heat dissipation effect; eddy current loss P is estimated using the equivalent method. e To verify the effectiveness of the vortex suppression structure.

[0052] Fine-tuning process: First, set the adjustable shielding plate 8 to the initial bias of 0.3mm; then, with the goal of "minimizing the difference between magnetic flux peak and valley", adjust the position of the adjustable shielding plate 8 through the spiral fine-tuning mechanism; after the adjustment is completed, lock and position it to ensure the stability of the optimized magnetic field distribution.

[0053] Testing and Acceptance (Example Limits, subject to adjustment based on operating conditions):

[0054] The bearing body 1 of this invention needs to pass the following tests to verify its performance before it can be accepted:

[0055] Magnetic field performance: Target magnetic flux density peak value 0.10~0.30T; circumferential fluctuation coefficient ≤±15% to ensure uniform magnetic flux distribution.

[0056] Eddy current suppression and heat dissipation performance: Eddy current loss was reduced by ≥30% compared with the control sample without composite slots; the operating temperature rise ΔT was reduced by ≥10%, verifying the synergistic effect of eddy current suppression and cooling system.

[0057] Liquid film and vibration performance: The root mean square value of liquid film thickness is reduced by ≥20%; the root mean square value of equipment vibration during operation meets the standard, improving load-bearing stability.

[0058] Positioning and adjustment performance: Repeat positioning accuracy ≤ ±0.05mm; fine adjustment mechanism stepping accuracy ≤ 0.05mm, ensuring accurate and reliable adjustment.

[0059] Durability: Meets the test requirements of ≥5000 start-stop cycles and >100h of operation in particulate media, and has no structural abnormalities, leaks, performance degradation or other problems, ensuring long-term stable operation.

[0060] Example 1: Suitable for radial load-bearing applications, shaft diameter Φ120mm; using relative permeability μ r Electrical steel laminations approximately 3000mm thick; circumferential vortex suppressor slots number n=12; radial through slot 3 width 0.6mm, axial semi-through slot depth 0.8mm, circumferential phase difference of vortex suppressor slots = pitch 50%; adjustable shielding plate 8 initial offset 0.3mm; conforming to the thickness t of thin-walled region 6. s =0.6mm, axial width w s =8mm; Shortest thermal path in the cooling circuit L2.5mm, fluid Reynolds number Re≈900. Experimental comparison: Compared with the sample without eddy current suppression slot, eddy current loss P e The temperature rise ΔT decreased by 17%, the peak-valley difference of magnetic flux density B decreased by 28%, and the liquid film thickness RMS decreased by 31%.

[0061] Example 2: Applicable to axial thrust bearing, employing a 12-sector × 2 radial layer structure; the circumferential phase difference of the vortex-suppressing slot is 75% of the pitch; the adjustable shielding plate 8 has a step accuracy of 0.05mm; the compliant thin-walled region 6 adopts a secondary distribution design. Experimental comparison: The thinnest liquid film thickness increased by 22%, the vibration RMS decreased by 27%, and the load-bearing stability was significantly improved.

[0062] Example 3: Suitable for sandy water environments with sand particle size ≤30μm and volume fraction 0.05%; employs a 6-zone independent throttling microporous static pressure array 13; combined with a labyrinth end-sealing structure. Experimental comparison: Liquid film thickness RMS reduced by 25%, wear volume reduced by 41%, demonstrating excellent resistance to harsh working conditions.

[0063] As described above, those skilled in the art can make various other corresponding changes and modifications based on the technical solutions and concepts of this invention, and all such changes and modifications should fall within the protection scope of the claims of this invention.

Claims

1. A bearing bush magnetic circuit integrated structure with radial and axial compound vortex suppression slits, characterized in that, The integrated magnetic circuit structure of the bearing includes the bearing body, zoned magnetic permeable blocks, vortex suppression slots, zoned water channels, compliant thin-walled areas, magnetic flux convergence windows, and adjustable shielding sheets. The partitioned magnetic permeable blocks are embedded in the bearing body in a ring-shaped multi-sector array and are symmetrically arranged between the left and right end faces of the bearing body along the axial direction. The vortex-suppressing slots include two types: radial through slots and axial semi-through slots or axial through slots. The vortex-suppressing slots are arranged at equal intervals of 4 to 24 along the circumference of the bearing body. The partitioned water channels are respectively set on the back side of the magnetic permeable inserts of each partition; The compliant thin-walled region is a liquid film region disposed between the bearing body and the partitioned magnetic permeable insert; The magnetic flux converging window is a magnetic passage area inside the bearing body. Each partition magnetic permeable block forms a corresponding magnetic flux converging window, which is distributed inside the bearing body on the back side of the partition magnetic permeable block. The adjustable shield is arranged parallel to the surface of the bearing body in the axial center region of the bearing body. The installation position of the adjustable shield is adjusted by a spiral fine adjuster set in the middle of the adjustable shield to achieve radial offset adjustment within the range of 0 to 1.0 mm.

2. The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots according to claim 1, characterized in that, The radial projections of the two types of vortex suppressor slots do not overlap, and the circumferential interval angle between adjacent vortex suppressor slots of the same type is 25% to 75% of the corresponding vortex suppressor slot pitch.

3. The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots according to claim 1, characterized in that, The partitioned waterways are arranged in a bow-shaped or arc-shaped configuration, with each partitioned waterway having an independent fluid outlet and fluid inlet interface, or the partitioned waterways being connected in series to form a whole. The shortest thermal path between the center of the partitioned water channel and the back side of the partitioned magnetic permeable block is no more than 3 mm, and the Reynolds number Re of the fluid in the partitioned water channel is controlled within the range of 200 to 1500.

4. The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots according to claim 1, characterized in that, The circumferential thickness of the compliant thin-walled region exhibits a quadratic function distribution or a piecewise linear distribution as the circumferential deflection angle θ between the liquid film and the central axis of the partitioned magnetic permeable block changes. The compliant thin-walled region meets the compliance characteristic requirement: for every 1 kPa change in liquid film pressure, the absolute value of the deformation generated by the compliant thin-walled region is not less than 0.05 μm.

5. The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots according to claim 1, characterized in that, The bearing body has a dovetail groove machined inside, and the partitioned magnetic guide block is fitted into the dovetail groove to achieve radial fixation.

6. The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots according to claim 5, characterized in that, A micro-preload spring is provided between the dovetail tenon and the mating surface of the partitioned magnetic inductance block, which applies a continuous radial and circumferential preload force to the partitioned magnetic inductance block.

7. The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots according to claim 1, characterized in that, The bearing body is made of PEEK, PI, ceramic, stainless steel or a composite material of the above materials; The partition magnetic guide insert uses soft magnetic composite powder core, electrical steel sheet or pure iron, and its relative magnetic permeability μ r is 200-6000.

8. The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots according to claim 1, characterized in that, The inner working surface of the bearing body is provided with microstructured grooves and a micropore hydrostatic array; wherein the depth of the microstructured grooves is 5-40 μm, and the included angle between the two walls of the microstructured grooves is 20-45°; the pore diameter of the micropores is 0.08-0.30 mm, and the pore density of the micropores is 5-25 pores / cm². 2 It adopts an independent throttling layout in zones 2 to 8.

9. The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots according to claim 1, characterized in that, The integrated magnetic circuit structure of the bearing bush with radial and axial composite vortex suppression slots is used in conjunction with an external permanent magnet ring or electromagnetic coil. After the magnetic flux density distribution is calibrated on site, it can be quickly fine-tuned by adjusting the bias of the adjustable shielding sheet.

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