A thrust foil bearing

Abstract

The utility model belongs to bearing technical field relates to a thrust foil bearing. The utility model, including the bearing seat, the bearing seat inside is sequentially equipped with rotary thrust disc and top foil, be equipped with assembled wave foil spare and auxiliary elastic pad between top foil and bearing seat, one side of assembled wave foil spare is pasted with auxiliary elastic pad, the other side is pasted with top foil, the both ends of bearing seat are equipped with detachable wave foil positioning spare and top foil flow guide alignment spare, detachable wave foil positioning spare is in abutment with assembled wave foil spare and auxiliary elastic pad, top foil flow guide alignment spare is in abutment with top foil, and the flow guide heat dissipation portion is seted up in top foil. The utility model in the use process, adopts three arc wave foils to be surrounded by jointing with alignment strip and alignment clamping groove, replaces traditional integral wave foil, can be replaced individually when partial damage, need not integral dismounting bearing seat, and maintenance efficiency is improved, and use cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology and relates to a thrust foil bearing. Background Technology

[0002] Thrust foil bearings, as a type of sliding bearing that relies on an air film formed between elastic foils and rotating components for support, possess advantages such as oil-free lubrication, strong high-speed adaptability, and low friction loss, and are widely used in high-end equipment fields such as aerospace, high-speed motors, and turbomachinery. However, existing thrust foil bearings suffer from several technical challenges in practical applications: First, traditional corrugated foils often employ an integral ring structure, requiring precise alignment with the bearing housing during assembly, making disassembly and assembly cumbersome, and necessitating replacement of the entire bearing when partial damage occurs, resulting in high maintenance costs; Second, the positioning structure design between the corrugated foil, bearing housing, and top foil is unreasonable, easily leading to circumferential offset or radial movement during high-speed operation, resulting in decreased foil bonding accuracy and affecting bearing load stability; Third, the heat dissipation structure is singular, making it difficult to quickly dissipate heat generated by friction, which can easily lead to degradation of foil material properties and shorten service life over long-term operation; Fourth, the elastic support components are mostly single metal corrugated foils, with limited buffering performance, unable to adapt to the elastic bonding requirements under different loads, and prone to localized stress concentration. Therefore, there is an urgent need to design a bearing that can overcome these shortcomings.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses a thrust foil bearing [application number: 202080009356.5]. This thrust foil bearing has a base plate with an insertion hole for shaft insertion and a top foil disposed around the insertion hole. The top foil has: a slit that divides the insertion hole into an inner region and an outer region in the radial direction; a clamping portion disposed in the outer region; an extension portion extending from the clamping portion to the inner region; and an inclined portion that, in the inner region, connects the end edge of the insertion hole on one side in the circumferential direction to the extension portion and extends from the extension portion to the other side in the circumferential direction, and is inclined relative to the flat surface of the base plate that expands in a direction orthogonal to the axial direction of the insertion hole. However, this solution still has the drawbacks of cumbersome disassembly and assembly process, generally poor bearing load stability, and a simple heat dissipation structure during use. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a thrust foil bearing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A thrust foil bearing includes a bearing housing, in which a rotating thrust disk and a top foil are sequentially mounted. An assembled corrugated foil component and an auxiliary elastic pad are provided between the top foil and the bearing housing. One side of the assembled corrugated foil component is in contact with the auxiliary elastic pad, and the other side is in contact with the top foil. Detachable corrugated foil positioning components and top foil flow guiding alignment components are provided at both ends of the bearing housing. The detachable corrugated foil positioning components abut against the assembled corrugated foil component and the auxiliary elastic pad, and the top foil flow guiding alignment components abut against the top foil. A flow guiding and heat dissipation section is provided inside the top foil.

[0006] In the aforementioned thrust foil bearing, the assembled corrugated foil component consists of three arc-shaped corrugated foils. The ends of the arc-shaped corrugated foils are respectively provided with alignment strips and alignment slots. The three arc-shaped corrugated foils surround each other to form a complete annular corrugated foil, and the alignment strips of the arc-shaped corrugated foils are inserted into the alignment slots of the adjacent arc-shaped corrugated foils to form a snap-fit ​​structure.

[0007] In the aforementioned thrust foil bearing, the auxiliary elastic pad is made of fluororubber, and the auxiliary elastic pad is bonded to the bearing housing with high-temperature resistant silicone adhesive.

[0008] In the aforementioned thrust foil bearing, the auxiliary elastic pad has several elastic pad heat dissipation slots, and the detachable corrugated foil positioning component and the top foil flow guiding alignment component are respectively staggered with the elastic pad heat dissipation slots.

[0009] In the aforementioned thrust foil bearing, the detachable corrugated foil positioning component includes three corrugated foil positioning bosses located at both ends of the bearing housing. The bottom of each corrugated foil positioning boss is provided with two corrugated foil positioning plates, which abut against the arc-shaped corrugated foil.

[0010] In the aforementioned thrust foil bearing, a boss mounting groove is provided in the bearing housing for accommodating the corrugated foil positioning boss, and the corrugated foil positioning boss is fixed to the bearing housing by bolts.

[0011] In the aforementioned thrust foil bearing, the two corrugated foil positioning plates at the bottom of the corrugated foil positioning boss are located on the left and right sides of the snap-fit ​​structure formed by the insertion of the alignment strip of the arc-shaped corrugated foil into the alignment slot of the adjacent arc-shaped corrugated foil.

[0012] In the aforementioned thrust foil bearing, the top foil guide alignment component includes a plurality of top foil alignment mounting seats disposed at both ends of the bearing housing, wherein the top foil alignment mounting seats abut against the top foil.

[0013] In the aforementioned thrust foil bearing, a groove is provided in the bearing housing for accommodating the top foil alignment mounting seat, and the top foil alignment mounting seat is fixed to the bearing housing by bolts.

[0014] In the aforementioned thrust foil bearing, the heat dissipation section includes a corrugated foil contact surface guide groove and a central guide groove disposed within the top foil. The corrugated foil contact surface guide groove corresponds to the arc-shaped corrugated foil. A plurality of ventilation holes are provided in the top foil alignment mounting seat. The corrugated foil contact surface guide groove and the arc-shaped corrugated foil are connected to the ventilation holes.

[0015] Compared with existing technologies, the advantages of this utility model are: 1. In the process of use, this utility model adopts three arc-shaped corrugated foils that are engaged with the alignment strip and the alignment slot to replace the traditional integral corrugated foil. When a part is damaged, it can be replaced individually without disassembling the bearing seat as a whole, thus improving maintenance efficiency and reducing usage costs.

[0016] 2. The detachable corrugated foil positioning component in this utility model precisely limits the positioning of the arc-shaped corrugated foil snap-fit ​​structure, and the top foil guide alignment component simultaneously fixes the top foil. The dual positioning effectively suppresses circumferential offset and radial movement during high-speed operation, improves positioning accuracy, and ensures consistent foil bonding.

[0017] 3. In this utility model, the auxiliary elastic pad and the assembled corrugated foil form a layered elastic support. The auxiliary elastic pad made of fluororubber has both buffering and heat conduction functions. Combined with the elastic deformation of the corrugated foil, it can adapt to the contact pressure requirements under different loads, reduce local stress concentration, and improve load-bearing stability.

[0018] 4. The double guide grooves built into the top foil in this utility model form a through heat dissipation path with the ventilation holes of the top foil mounting base. The centrifugal force of the rotating thrust disk guides the airflow to flow quickly, which improves the heat dissipation efficiency compared with the traditional structure, effectively controls the friction temperature rise, and extends the service life of the foil.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is an assembly diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of an arc-shaped corrugated foil.

[0022] Figure 3 This is a schematic diagram of the top foil structure.

[0023] Figure 4 This is a schematic diagram of the top foil alignment mounting base.

[0024] In the diagram: 1. Bearing housing; 2. Rotary thrust disk; 3. Top foil; 4. Assembled corrugated foil component; 5. Auxiliary elastic pad; 6. Detachable corrugated foil positioning component; 7. Top foil flow guide alignment component; 8. Flow guide heat dissipation part; 9. Arc-shaped corrugated foil; 10. Alignment strip; 11. Alignment slot; 12. Elastic pad heat dissipation slot; 13. Corrugated foil positioning boss; 14. Corrugated foil positioning plate; 15. Top foil alignment mounting seat; 16. Corrugated foil contact surface flow guide groove; 17. Middle flow guide groove; 18. Ventilation hole. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a thrust foil bearing includes a bearing housing 1. A rotating thrust disk 2 and a top foil 3 are sequentially installed inside the bearing housing 1. An assembled corrugated foil component 4 and an auxiliary elastic pad 5 are provided between the top foil 3 and the bearing housing 1. One side of the assembled corrugated foil component 4 is in contact with the auxiliary elastic pad 5, and the other side is in contact with the top foil 3. The bearing housing 1 has detachable corrugated foil positioning components 6 and top foil flow guiding alignment components 7 at both ends. The detachable corrugated foil positioning components 6 abut against the assembled corrugated foil component 4 and the auxiliary elastic pad 5. The top foil flow guiding alignment component 7 abuts against the top foil 3. A flow guiding and heat dissipation part 8 is provided inside the top foil 3.

[0027] In this embodiment, the bearing housing 1 serves as the overall mounting reference, and a stepped mounting cavity is formed inside it. The rotating thrust disk 2, top foil 3, assembled corrugated foil 4, and auxiliary elastic pad 5 are arranged sequentially from top to bottom along the axial direction. The detachable corrugated foil positioning component 6 and the top foil guide alignment component 7 are respectively installed on the inner sides of both ends of the bearing housing 1 to form a bidirectional positioning structure. The inner ring of the rotating thrust disk 2 is interference-fitted with the outer rotating shaft, and its lower end face forms a sliding fit surface with the upper end face of the top foil 3. The lower end face of the top foil 3 is tightly fitted with the upper crest of the assembled corrugated foil 4, and the lower end face of the assembled corrugated foil 4 is in full contact with the auxiliary elastic pad 5. The auxiliary elastic pad 5 is fixed to the bottom of the mounting cavity of the bearing housing 1; the detachable corrugated foil positioning component 6 abuts against the edge of the assembled corrugated foil component 4 and the auxiliary elastic pad 5 from the radial direction, and the top foil guide alignment component 7 abuts against the outer ring of the top foil 3 from the radial direction, thereby realizing the axial positioning of each component. Through the composite support of "assembled corrugated foil + auxiliary elastic pad" and the coordinated positioning of "dual positioning components", the pain points of poor elastic fit and inaccurate positioning of traditional bearings are solved. At the same time, the heat dissipation part 8 built into the top foil 3 forms a functional integration with the positioning component, realizing the dual functions of heat dissipation and positioning without increasing extra space. The structure is compact and highly practical.

[0028] Combination Figure 1-4As shown, the assembled corrugated foil 4 is composed of three arc-shaped corrugated foils 9. The ends of the arc-shaped corrugated foils 9 are respectively provided with alignment strips 10 and alignment slots 11. The three arc-shaped corrugated foils 9 surround each other to form a complete annular corrugated foil, and the alignment strips 10 of the arc-shaped corrugated foils 9 are inserted into the alignment slots 11 of the adjacent arc-shaped corrugated foils 9 to form a snap-fit ​​structure.

[0029] Specifically, three arc-shaped corrugated foils 9 are evenly distributed around the bearing housing 1. The alignment strip 10 of the first arc-shaped corrugated foil 9 is inserted into the alignment slot 11 of the second arc-shaped corrugated foil 9, the alignment strip 10 of the second arc-shaped corrugated foil 9 is inserted into the alignment slot 11 of the third arc-shaped corrugated foil 9, and the alignment strip 10 of the third arc-shaped corrugated foil 9 is inserted into the alignment slot 11 of the first arc-shaped corrugated foil 9, thus forming a complete annular corrugated foil structure. The inner diameter of the annular corrugated foil is consistent with the inner diameter of the top foil 3, and the outer diameter is adapted to the outer diameter of the auxiliary elastic pad 5. The integral corrugated foil is disassembled into a three-section assembly structure. The quick enclosure is achieved by the snap-fit ​​of the alignment strip 10 and the alignment slot 11, which solves the problems of difficult disassembly and assembly and high maintenance costs of traditional integral corrugated foils. At the same time, the three-section structure allows for the replacement of arc-shaped corrugated foils 9 with different stiffnesses according to actual load requirements, making it more adaptable. When a single arc-shaped corrugated foil 9 is damaged, it only needs to be replaced individually, without the need for the whole structure to be scrapped, which significantly reduces the cost of use.

[0030] The auxiliary elastic pad 5 is made of fluororubber and is bonded to the bearing seat 1 with high-temperature resistant silicone adhesive.

[0031] In this embodiment, the auxiliary elastic pad 5 is made of fluororubber with a Shore hardness of 55HA. This material has both good elastic cushioning performance and high temperature resistance (long-term operating temperature ≤200℃). The thickness of the auxiliary elastic pad 5 is 3mm. Its outer diameter is consistent with the inner diameter of the bearing housing 1 mounting cavity, and its inner diameter is adapted to the inner diameter of the top foil 3. The lower end face of the auxiliary elastic pad 5 is bonded and fixed to the bottom support surface of the bearing housing 1 mounting cavity with high temperature resistant silicone adhesive. When bonding, ensure that the auxiliary elastic pad 5 completely covers the bottom of the mounting cavity (avoiding the position of the elastic pad heat dissipation slot 12 to be opened later). The flatness error of the bonding surface is ≤0.01mm, ensuring that the auxiliary elastic pad 5 is firmly connected to the bearing housing 1 and deforms uniformly when subjected to force.

[0032] Combination Figure 1 As shown, the auxiliary elastic pad 5 has several elastic pad heat dissipation slots 12, and the detachable corrugated foil positioning component 6 and the top foil flow guiding alignment component 7 are respectively staggered with the elastic pad heat dissipation slots 12.

[0033] In this embodiment, the elastic pad heat dissipation slots 12, the detachable corrugated foil positioning component 6, and the top foil flow guiding alignment component 7 are staggered. That is, the area between two adjacent elastic pad heat dissipation slots 12 corresponds to one detachable corrugated foil positioning component 6 or one top foil flow guiding alignment component 7, ensuring that the positioning component and the heat dissipation slot do not interfere with each other, so as not to affect the installation and limiting function of each positioning component, and to maximize the heat dissipation area.

[0034] The detachable corrugated foil positioning component 6 includes three corrugated foil positioning bosses 13 disposed at both ends of the bearing seat 1. The bottom of each corrugated foil positioning boss 13 is provided with two corrugated foil positioning plates 14, which abut against the arc-shaped corrugated foil 9.

[0035] In this embodiment, the lower end face of the corrugated foil positioning plate 14 abuts against the edge of the upper end face of the assembled corrugated foil 4, with the abutment pressure controlled at 5-8N. This ensures that the axial movement of the assembled corrugated foil 4 is restricted without affecting its elastic deformation. The two corrugated foil positioning plates 14 respectively fit against the two end faces of the arc-shaped corrugated foil 9, forming a lateral limit to prevent the arc-shaped corrugated foil 9 from shifting circumferentially. Through the structural design of "boss + double positioning plate", the axial and circumferential dual limit of the assembled corrugated foil 4 is achieved, solving the problem that the traditional positioning structure can only limit in one direction and has insufficient positioning accuracy. The three corrugated foil positioning bosses 13 are evenly distributed to ensure that the assembled corrugated foil 4 is subjected to balanced force, avoiding deformation obstruction caused by excessive local positioning. At the same time, the lateral limit method of the double positioning plate does not damage the snap-fit ​​structure of the arc-shaped corrugated foil 9, ensuring the stability of the assembled design.

[0036] Combination Figure 1 As shown, the bearing housing 1 has a boss mounting groove for accommodating the corrugated foil positioning boss 13, and the corrugated foil positioning boss 13 is fixed to the bearing housing 1 by bolts.

[0037] In this embodiment, the corrugated foil positioning boss 13 is embedded in the boss mounting groove. After the mounting hole and the threaded hole are aligned, the corrugated foil positioning boss 13 is fixedly connected to the bearing seat 1 by M4 hexagon socket bolts. The bolt tightening torque is controlled at 8-10 N·m to ensure that the corrugated foil positioning boss 13 is firmly fixed and does not loosen during high-speed operation. The bolt-fixed detachable design replaces the traditional welding or one-piece molding positioning structure, which is convenient for disassembly and maintenance.

[0038] The two corrugated foil positioning plates 14 at the bottom of the corrugated foil positioning boss 13 are located on the left and right sides of the snap-fit ​​structure formed by the insertion of the alignment strip 10 of the arc-shaped corrugated foil 9 into the alignment slot 11 of the adjacent arc-shaped corrugated foil 9.

[0039] In this embodiment, two corrugated foil positioning plates 14 are located on the left and right sides of the snap-fit ​​structure, respectively. The inner end face of the positioning plate is attached to the side of the snap-fit ​​structure with a fitting gap of ≤0.02mm. This does not affect the connection strength of the snap-fit ​​structure, but also restricts the lateral displacement of the snap-fit ​​structure through the positioning plate, preventing the alignment strip 10 from detaching from the alignment slot 11 during high-speed operation. This ensures precise alignment between the positioning plate and the snap-fit ​​structure, strengthening and limiting the weak link (snap-fit) of the assembled corrugated foil 4. This solves the problem that traditional positioning structures neglect the fixation of the snap-fit ​​and are prone to detachment failure. At the same time, the gap fit between the positioning plate and the snap-fit ​​structure ensures that the elastic deformation of the corrugated foil is not hindered. Under the premise of ensuring positioning stability, the elastic adaptation advantage of the assembled corrugated foil 4 is retained.

[0040] Combination Figure 1-4 As shown, the top foil guiding alignment component 7 includes a plurality of top foil alignment mounting seats 15 disposed at both ends of the bearing seat 1, and the top foil alignment mounting seats 15 abut against the top foil 3.

[0041] In this embodiment, the inner arc surface of the top foil alignment mounting seat 15 abuts against the outer ring end face of the top foil 3. The abutting surface is polished (roughness Ra≤0.8μm) to reduce frictional damage to the top foil 3. The abutting pressure is controlled at 3-5N to ensure that the radial movement of the top foil 3 is restricted while its axial elastic deformation is not affected. Multiple evenly distributed arc-shaped top foil alignment mounting seats 15 are used to replace the traditional annular retaining ring positioning structure, so as to achieve multi-point uniform positioning of the top foil 3 and avoid uneven deformation of the top foil 3 caused by excessive local positioning. At the same time, the arc structure fits perfectly with the outer ring of the top foil 3, with a larger contact area and stronger positioning stability. Moreover, multi-point positioning can disperse the lateral force of the top foil 3 and reduce local wear.

[0042] Combination Figure 1-4 As shown, a groove is provided in the bearing housing 1 for accommodating the top foil alignment mounting seat 15, and the top foil alignment mounting seat 15 is fixed to the bearing housing 1 by bolts.

[0043] In this embodiment, the top foil alignment mounting seat 15 is embedded in the groove. After the mounting hole and the threaded hole are aligned, the top foil alignment mounting seat 15 is fixedly connected to the bearing seat 1 by an M3 hexagon socket bolt, ensuring that the top foil alignment mounting seat 15 is firmly fixed and that the inner arc surface is tightly fitted to the outer ring of the top foil 3.

[0044] Combination Figure 1-4 As shown, the heat dissipation section 8 includes a corrugated foil contact surface guide groove 16 and a middle guide groove 17 disposed in the top foil 3. The corrugated foil contact surface guide groove 16 corresponds to the arc-shaped corrugated foil 9. A plurality of ventilation holes 18 are provided in the top foil alignment mounting base 15. The corrugated foil contact surface guide groove 16 and the arc-shaped corrugated foil 9 are connected to the ventilation holes 18.

[0045] In this embodiment, the outer end of the corrugated foil contact surface guide groove 16 is connected to the ventilation hole 18 of the top foil alignment mounting seat 15 in a one-to-one correspondence, and the inner end is connected to the middle guide groove 17. The lower end of the ventilation hole 18 extends to the outside of the bearing seat 1, forming a through heat dissipation channel of "middle guide groove 17 → corrugated foil contact surface guide groove 16 → ventilation hole 18 → outside". At the same time, the corrugated foil contact surface guide groove 16 and the crest position of the arc-shaped corrugated foil 9 are staggered to avoid affecting the bonding effect between the top foil 3 and the corrugated foil. The design of the "annular + arc" combined guide groove and ventilation hole connection structure utilizes the centrifugal force generated by the rotation of the rotating thrust disk 2 to guide the outside cold air from the outside of the bearing seat 1 into the ventilation hole 18, flow into the middle guide groove 17 through the corrugated foil contact surface guide groove 16, and take away the heat generated by the contact between the top foil 3 and the assembled corrugated foil 4. Then, it is discharged from the ventilation hole 18 on the other side to achieve active heat dissipation.

[0046] The working principle of this utility model is as follows: First, the auxiliary elastic pad 5 is bonded to the bottom of the mounting cavity of the bearing housing 1 using high-temperature resistant silicone adhesive. Then, three arc-shaped corrugated foils 9 are engaged with the alignment strip 10 and the alignment slot 11 to form an assembled corrugated foil component 4, which is placed above the auxiliary elastic pad 5. Next, the corrugated foil positioning boss 13 is fixed to the boss mounting slot with bolts, so that the corrugated foil positioning plate 14 abuts against the snap-fit ​​structure and the edge of the assembled corrugated foil component 4, completing the corrugated foil positioning. Then, the top foil 3 is placed on top of the assembled corrugated foil component 4 and fixed with bolts on the top foil alignment mounting seat 15 to achieve the positioning of the top foil 3. Finally, the rotating thrust disk 2 is interference-fitted with the external rotating shaft, so that the lower end face of the rotating thrust disk 2 and the upper end face of the top foil 3 form a sliding fit surface, completing the overall assembly. An external rotating shaft drives the rotating thrust disk 2 to rotate at high speed. This generates aerodynamic pressure between the rotating thrust disk 2 and the top foil 3, forming an air film support that achieves contactless sliding friction and reduces wear. At this time, the assembled corrugated foil component 4 and the auxiliary elastic pad 5 undergo elastic deformation together, adjusting the contact pressure according to the axial load of the rotating thrust disk 2 to avoid localized stress concentration. The detachable corrugated foil positioning component 6 and the top foil guide alignment component 7 respectively limit the offset between the assembled corrugated foil component 4 and the top foil 3, ensuring uniform air film thickness and improving operational stability. The centrifugal force generated by the rotation of the rotary thrust disk 2 drives the airflow. Cold air from the outside enters the ventilation hole 18 of the top foil alignment mounting seat 15 from the outside of the bearing housing 1, flows into the central guide groove 17 through the corrugated foil contact surface guide groove 16, absorbs the frictional heat between the top foil 3 and the assembled corrugated foil 4 during the flow, and is then discharged to the outside through the ventilation hole 18 on the other side, forming a continuous heat dissipation circuit. At the same time, the elastic pad heat dissipation slot 12 of the auxiliary elastic pad 5 increases the heat dissipation area, accelerates heat transfer, and further reduces the overall temperature of the bearing. When the arc-shaped corrugated foil 9 or the top foil 3 is damaged, the fixing bolts of the corrugated foil positioning boss 13 and the top foil alignment mounting seat 15 can be unscrewed. After removing the positioning part, the damaged arc-shaped corrugated foil 9 or the top foil 3 can be directly replaced. There is no need to completely disassemble the bearing seat 1 and the rotating shaft. The maintenance operation is convenient and significantly reduces downtime and maintenance costs.

[0047] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0048] Although this document frequently uses terms such as bearing housing 1, rotating thrust disk 2, top foil 3, assembled corrugated foil component 4, auxiliary elastic pad 5, detachable corrugated foil positioning component 6, top foil flow guide alignment component 7, flow guide heat dissipation part 8, arc-shaped corrugated foil 9, alignment strip 10, alignment slot 11, elastic pad heat dissipation slot 12, corrugated foil positioning boss 13, corrugated foil positioning plate 14, top foil alignment mounting seat 15, corrugated foil contact surface flow guide groove 16, central flow guide groove 17, ventilation hole 18, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A thrust foil bearing, comprising a bearing housing (1), characterized in that, The bearing housing (1) is sequentially equipped with a rotating thrust disk (2) and a top foil (3). An assembled corrugated foil component (4) and an auxiliary elastic pad (5) are provided between the top foil (3) and the bearing housing (1). One side of the assembled corrugated foil component (4) is in contact with the auxiliary elastic pad (5), and the other side is in contact with the top foil (3). The bearing housing (1) is provided with a detachable corrugated foil positioning component (6) and a top foil flow guiding alignment component (7) at both ends. The detachable corrugated foil positioning component (6) abuts against the assembled corrugated foil component (4) and the auxiliary elastic pad (5). The top foil flow guiding alignment component (7) abuts against the top foil (3). A flow guiding heat dissipation part (8) is provided inside the top foil (3).

2. A thrust foil bearing according to claim 1, characterized in that The assembled corrugated foil component (4) consists of three arc-shaped corrugated foils (9). The ends of the arc-shaped corrugated foils (9) are respectively provided with alignment strips (10) and alignment slots (11). The three arc-shaped corrugated foils (9) surround each other to form a complete annular corrugated foil, and the alignment strips (10) of the arc-shaped corrugated foils (9) are inserted into the alignment slots (11) of the adjacent arc-shaped corrugated foils (9) to form a snap-fit ​​structure.

3. A thrust foil bearing according to claim 2, wherein, The auxiliary elastic pad (5) is made of fluororubber and is bonded to the bearing seat (1) with high-temperature resistant silicone adhesive.

4. A thrust foil bearing according to claim 3, wherein, The auxiliary elastic pad (5) has several elastic pad heat dissipation slots (12) inside, and the detachable corrugated foil positioning component (6) and the top foil flow guiding alignment component (7) are respectively staggered with the elastic pad heat dissipation slots (12).

5. A thrust foil bearing according to claim 4, wherein, The detachable corrugated foil positioning component (6) includes three corrugated foil positioning bosses (13) located at both ends of the bearing seat (1). The bottom of the corrugated foil positioning bosses (13) is provided with two corrugated foil positioning plates (14), which abut against the arc-shaped corrugated foil (9).

6. A thrust foil bearing according to claim 5, wherein, The bearing housing (1) has a boss mounting groove for accommodating the corrugated foil positioning boss (13), and the corrugated foil positioning boss (13) is fixed to the bearing housing (1) by bolts.

7. A thrust foil bearing according to claim 6, wherein, The two corrugated foil positioning plates (14) at the bottom of the corrugated foil positioning boss (13) are located on the left and right sides of the snap-fit ​​structure formed by the alignment strip (10) of the arc-shaped corrugated foil (9) being inserted into the alignment slot (11) of the adjacent arc-shaped corrugated foil (9).

8. A thrust foil bearing according to claim 2, wherein, The top foil guide alignment component (7) includes a plurality of top foil alignment mounting seats (15) disposed at both ends of the bearing seat (1), and the top foil alignment mounting seats (15) abut against the top foil (3).

9. A thrust foil bearing according to claim 8, wherein, The bearing housing (1) has a groove for accommodating the top foil alignment mounting seat (15), and the top foil alignment mounting seat (15) is fixed to the bearing housing (1) by bolts.

10. A thrust foil bearing according to claim 9, wherein, The heat dissipation section (8) includes a corrugated foil contact surface guide groove (16) and a middle guide groove (17) disposed in the top foil (3). The corrugated foil contact surface guide groove (16) corresponds to the arc-shaped corrugated foil (9). A plurality of ventilation holes (18) are provided in the top foil alignment mounting base (15). The corrugated foil contact surface guide groove (16) is connected to the arc-shaped corrugated foil (9) and the ventilation holes (18).

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