A foil type elastic support assembly

Abstract

The application discloses a foil type elastic supporting assembly, which comprises a base foil, a plurality of first supporting units (1) fixedly connected to a first side surface of the base foil, and a plurality of second supporting units (3) fixedly connected to a second side surface of the base foil. The first supporting units (1) and the second supporting units (3) are arranged at intervals in a distribution direction, so that each first supporting unit (1) is located in an interval region between two adjacent second supporting units (3) in the distribution direction; the first supporting units (1) and the second supporting units (3) form an integrated assembly through the base foil, and form an integrated bending force transmission structure. The application adopts the design of "one body and two sides" staggered arrangement, converts the pressure in the loaded state into elastic bending deformation inside the base foil, completely eliminates the relative sliding friction between traditional multiple assemblies, effectively protects the foil coating and prolongs the service life of the bearing, simultaneously greatly simplifies the assembly process, and realizes the high integration and modularization of the supporting structure.

Description

Technical Field

[0001] This invention belongs to the field of elastic support structure technology, and specifically relates to a foil-type elastic support assembly. Background Technology

[0002] In many mechanical systems, elastic support structures are widely used to provide flexible support, absorb vibration, and adjust system stiffness. Traditional elastic support elements mainly include corrugated foil, helical springs, rubber pads, and multi-layered springs. Among them, helical springs have a large axial dimension, making them difficult to apply in compact mechanical spaces; rubber pads have poor high-temperature resistance and cannot adapt to extreme temperature environments; and multi-layered springs have the disadvantages of complex structure and high assembly precision requirements.

[0003] Especially in fields with extremely high requirements for space and stability, such as hydrodynamic bearings and high-speed rotating machinery, traditional elastic support structures typically employ corrugated foil, which provides support through the elastic deformation of the crests and troughs. However, this traditional corrugated foil structure faces the following significant technical bottlenecks in practical engineering applications: Firstly, the processing technology of corrugated foil is complex, requiring the development of special high-precision stamping dies, which leads to high manufacturing costs. Moreover, once stamped, its mechanical stiffness characteristics are fixed, limiting the space for optimizing structural performance and making it difficult to flexibly adjust according to different working conditions.

[0004] Secondly, traditional corrugated foil and top working foil are usually two completely independent components. In actual assembly, precise spatial positioning and fixing of both are required, which not only significantly increases the difficulty and time of manual assembly, but also easily leads to stress concentration or relative sliding friction between multiple components under complex loads.

[0005] Therefore, there is an urgent need in this field for a new type of foil-type elastic support component that is compact, easy to process, requires no complex molding molds, and can highly integrate force transmission and support functions, so as to completely overcome the defects of traditional loose parts assembly difficulties and stiffness inaccurate control. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention aims to provide a foil-type elastic support assembly that is simple in structure, easy to process, and highly integrated. By fixing support units on the upper and lower surfaces of the base foil and arranging them in an alternating manner, the elastic deformation of the base foil is achieved in a "two-sided" manner. This forms a double-sided coupled support system on the basis of a single-piece structure, thereby overcoming the technical defects of traditional elastic support elements, such as mold processing, stress concentration leading to plastic deformation, and assembly difficulties.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a foil-type elastic support assembly, including a base foil, a plurality of first support units, and a plurality of second support units; the plurality of first support units are fixedly connected to a first side surface of the base foil; the plurality of second support units are fixedly connected to a second side surface of the base foil opposite to the first side; wherein the first support units and the second support units are spaced apart in a distribution direction, such that each first support unit is located in the interval region between adjacent second support units in this distribution direction; the first support units and the second support units are integrated into an integral assembly through the base foil, forming an integrated bending force transmission structure.

[0008] Furthermore, the first support unit and the second support unit can be selected from either strip foil or circumferential foil; specifically, strip foil 1 and strip foil 2, or specifically circumferential foil 1 and circumferential foil 2, with their extension direction perpendicular to the distribution direction. Alternatively, both the first support unit and the second support unit are composed of multiple pairs of inclined foils, wherein the inclined foils include inclined foil 1, inclined foil 2, inclined foil 3, and inclined foil 4, and the two inclined foils in the same pair are not parallel to each other.

[0009] Furthermore, the first support unit and the second support unit are arranged in at least one row in a direction perpendicular to the distribution direction, and each row includes a plurality of support units spaced apart along the distribution direction.

[0010] Furthermore, the base foil can be selected from any one of a flat foil, an integral foil 1, and an integral foil 2, and one end of the base foil is fixed while the other end is free. Alternatively, the base foil can be selected from any one of a fan-shaped foil and an integral fan-shaped foil, and multiple base foils are distributed circumferentially to form a ring support structure, with one end of each base foil fixed circumferentially and the other end free.

[0011] Furthermore, at least a portion of the surface of the base foil constitutes a hydrodynamic lubrication film support surface.

[0012] Furthermore, the foil-type elastic support assembly is configured as a multi-level elastic support system; the multi-level elastic support system includes at least two foil-type elastic support assemblies, which are stacked sequentially in the radial or axial direction; in two adjacent layers of foil-type elastic support assemblies, the first support unit of the upper layer assembly is in direct contact with the second support unit of the lower layer assembly, thereby forming an inter-level support structure.

[0013] Furthermore, the foil-type elastic support assembly is applied in a radial hydrodynamic bearing, which includes a bearing sleeve, and the foil-type elastic support assembly is disposed within the bearing sleeve; the base foil can be selected from either integral foil 1 or integral foil 2, and is used to provide the attachment substrate and lubricating film support surface of the support unit. When the base foil is an integral foil 1, its circumferential length is greater than the inner circumference of the bearing sleeve. The integral foil 1 has a radially inner and outer two-ring rolled structure. The upper and lower surfaces of its outer ring are fixed with a second support unit and a first support unit. Its inner ring surface has no support unit and overlaps with the second support unit on the outer ring. The inner surface of the inner ring forms a lubricating film support surface. When the base foil is an integral foil 2, its circumferential length is less than the inner circumference of the bearing sleeve. Multiple integral foils 2 are distributed circumferentially. The first support unit and the second support unit are only fixed to a part of the surface of the integral foil 2. The remaining surfaces have no support units. In two adjacent integral foils 2, the part without a support unit overlaps with the second support unit of the other. The inner surfaces of the parts without support units of each integral foil 2 together form a lubricating film support surface.

[0014] Furthermore, the foil-type elastic support assembly is applied to a thrust hydrodynamic bearing, which includes an annular base, and multiple foil-type elastic support assemblies are circumferentially distributed and fixed on the annular base; the base foil is an integral fan-shaped foil, and the first support unit and the second support unit are only fixed to a partial surface of the integral fan-shaped foil, with no support units on the remaining surfaces; in two adjacent integral fan-shaped foils, the unsupported unit portion of one integral fan-shaped foil overlaps the first support unit of the other integral fan-shaped foil, and the upper surfaces of the unsupported unit portions of each integral fan-shaped foil together constitute a lubricating film support surface.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) Simplified structure and highly integrated: The planar support unit and base foil can be made by simple stamping and cutting processes without the need for complex molds; a two-way coupled force system is formed by the double-sided staggered arrangement, and the bending deformation of the base foil itself realizes the load transfer. The functions that require multiple independent parts in the traditional solution are integrated into one component, reducing the number of parts. It can be welded into shape at one time, with a compact structure, which greatly reduces the difficulty of manufacturing and assembly. (2) Deformation optimization: The support units on both sides apply forces to the base foil in opposite directions, causing the base foil to undergo bending deformation rather than simple compression deformation, thus avoiding relative sliding and friction between multiple components; (3) The radial or axial stiffness of the system can be precisely controlled by adjusting the angle (such as tilted foil), spacing, and thickness of the support unit, or by using a multi-level stacked configuration. This component can be used independently as an elastic element, or it can be modularly combined for use in radial and thrust bearings, demonstrating strong industrial versatility. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0017] Figure 1 An exploded view of the foil-type elastic support assembly provided by the present invention.

[0018] Figure 2 Isometric view and right view of the foil-type elastic support assembly provided by the present invention.

[0019] Figure 3 An exploded view of the first improvement (strip foil structure) of the foil-type elastic support assembly provided by the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the present invention applied to a radial hydrodynamic bearing.

[0021] Figure 5 This is a schematic diagram of a second improvement (integrated foil 2 structure) of the foil-type elastic support component provided by the present invention.

[0022] Figure 6 This is a schematic diagram of an improved embodiment of the radial hydrodynamic bearing provided by the present invention.

[0023] Figure 7 This is an exploded structural diagram of the fan-shaped support assembly provided by the present invention.

[0024] Figure 8 This is a schematic diagram of the first improvement (strip foil structure) of the fan-shaped support component provided by the present invention.

[0025] Figure 9 This is a schematic diagram of the fan-shaped foil provided by the present invention.

[0026] Figure 10 This is a schematic diagram of a second improvement (circumferential foil structure) to the fan-shaped support component provided by the present invention.

[0027] Figure 11 This is a schematic diagram of a third improvement (integrated fan-shaped foil structure) to the fan-shaped support component provided by the present invention.

[0028] Figure 12 This is an exploded structural diagram of the present invention applied to a thrust hydrodynamic bearing.

[0029] In the figure: 1-First support unit, 2-Flat foil, 3-Second support unit, 4-Support assembly, 5-Bearing sleeve, 6-Fan-shaped support assembly, 7-Fan-shaped foil, 8-Annular base, 11-Inclined foil 1, 12-Inclined foil 2, 13-Strip foil 1, 14-Circumferential foil 1, 21-Integrated foil 1, 22-Integrated foil 2, 31-Inclined foil 3, 32-Inclined foil 4, 33-Strip foil 2, 34-Circumferential foil 2, 71-Independent fan-shaped foil, 72-Integrated fan-shaped foil. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will now be described in detail. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods that can be obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0031] In the description of this invention, it should be particularly noted that, unless otherwise stated, "a plurality of" refers to two or more; the directions or positional relationships indicated by the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., are based on the directions or positional relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of this invention and simplifying the explanation. They do not imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention. In the radial bearing embodiment, "inner surface" specifically refers to the side facing the rotor after being curled, and "outer surface" specifically refers to the side facing away from the rotor.

[0032] In the following embodiments, for ease of understanding and description, the foil-type elastic support assembly provided by the present invention is applied to a hydrodynamic bearing. However, those skilled in the art should understand that these embodiments are merely one specific application of the present invention, and the scope of protection of the present invention is not limited thereto.

[0033] In this invention, the “first support unit” and “second support unit” refer to components fixed to the surface of the base foil, which in specific embodiments are in the form of inclined foil, strip foil or circumferential foil, etc.; the “base foil” refers to the base component that is the only support unit in this invention and is the core support component of the component, which in specific embodiments is in the form of flat foil (2), integrated foil 1 (21), integrated foil 2 (22), fan-shaped foil (7) or integrated fan-shaped foil (72).

[0034] "One-piece two-sided bending deformation" means that when a load is applied to a support unit on one side of the base foil, the base foil bends and transmits the force to the support unit on the other side. The whole process occurs within the same base foil, rather than being transmitted between different components.

[0035] In this invention, "distribution direction" refers to the arrangement direction of the support units on the surface of the base foil. For radial bearings, this is usually the circumferential or axial direction, and for thrust bearings, it is usually the circumferential or radial direction. "Perpendicular direction of distribution direction" refers to the direction perpendicular to the distribution direction. For radial bearings, this is usually the axial or circumferential direction, and for thrust bearings, it is usually the radial or circumferential direction.

[0036] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the invention pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of the invention.

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1: Refer to Figures 1 to 2 As shown, the first support unit of this embodiment is provided with two rows of inclined foils along the axis, namely inclined foil 1 (11) and inclined foil 2 (12), and the second support unit is provided with two rows of inclined foils along the axis, namely inclined foil 3 (31) and inclined foil 4 (32). The support assembly (4) is rolled into a circle and consists of a base foil (2), inclined foils 1 (11) and 2 (12) fixed to one side of its surface, and inclined foils 3 (31) and 4 (32) fixed to the other side of its surface. The base foil itself is both a support base and a bearing surface.

[0039] Inclined foils 1 (11), 2 (12), 3 (31), and 4 (32) are distributed circumferentially. Inclined foils 1 (11) and 2 (12) are placed on both sides of the axial mid-surface of the support assembly (4). The axially adjacent inclined foils 1 (11) and 2 (12) do not contact each other and form acute angles with the axis of the support assembly (4), with opposite signs. This makes the same end of the two axially inclined foils close to each other and the other end far away from each other. Inclined foils 3 (31) and 4 (32) are structurally the same as the inclined foils mentioned above, except that they are fixed on opposite side surfaces of the support assembly (4). In the distribution direction, the circumferential length of the inclined foil 3 (31) is smaller than the interval between two adjacent inclined foils 1 (11) and is placed in this distance; the inclined foil 4 (32) is placed in the interval between two adjacent inclined foils 2 (12). This staggered arrangement makes the deformation of the support structure on both sides of the axial direction present an angle, increasing the deformation stiffness.

[0040] As an optional improved implementation, the axial length of the inclined foil 1 (11) is greater than the axial length of the inclined foil 2 (12), the axial length of the inclined foil 3 (31) is greater than the axial length of the inclined foil 4 (32), and the symmetrical planes of the inclined foils on the upper and lower surfaces are not in the middle position of the axial direction.

[0041] Example 2: Refer to Figure 3 As shown, in this embodiment, both the first support unit and the second support unit are strip foils. Strip foil 1 (13) and strip foil 2 (33) extend axially and are spaced apart in the circumferential direction. Strip foil 1 (13) is fixed to one side surface of flat foil (2), and strip foil 2 (33) is fixed to the other side surface of flat foil (2). Strip foil 1 (13) is located between two adjacent strip foils 2 (33), and the circumferential length of strip foil 1 (13) is less than the distance between two adjacent strip foils 2 (33), and is placed within this distance, that is, the projection of strip foil 1 (13) falls in the gap between two strip foils 2 (33). This spaced arrangement is achieved by adjusting the number, spacing and relative position of strip foil 1 (13) and strip foil 2 (33). The strip foil 1 (13) together with the flat foil (2) and the strip foil 2 (33) form an integrated force transmission structure. This modular design improves assembly flexibility.

[0042] During operation, when a load is applied to the strip foil 2 (33), the force is transmitted to the flat foil (2). Due to the misaligned arrangement of the strip foil 1 (13) and the strip foil 2 (33), the flat foil (2) will bend and deform, transmitting the force to the strip foil 1 (13) located on its opposite side surface, and then from the strip foil 1 (13) to the next level structure (such as the bearing sleeve). This forms a zigzag force transmission path of "strip foil 2 - flat foil - strip foil 1".

[0043] The advantages of this structure are: first, it realizes the bidirectional force transmission function that originally required multiple independent parts through a basic foil, and the structure is highly integrated; second, the staggered arrangement makes the support points of the strip foil 1 (13) and the strip foil 3 (33) staggered, avoiding stress concentration and improving fatigue life; third, by adjusting the number, spacing and size of the strip foils, the stiffness characteristics of the component can be precisely adjusted.

[0044] As an optional improved implementation, the strip foil 1 (13) and the strip foil 3 (33) extend circumferentially and are spaced apart in the axial direction, with the axial length of the strip foil 1 (13) being less than the distance between two adjacent strip foils 2 (33).

[0045] Example 3: As Figure 4 As shown, the present invention provides a radial hydrodynamic bearing, including a bearing sleeve (5) and a foil-type elastic support assembly. The foil-type elastic support assembly consists of an integral foil 1 (21) and a first support unit (1) and a second support unit (3) fixed on its surface. The first support unit (1) and the second support unit (3) are fixed only to a local surface of the integral foil 1 (21) (for example, half of the circumferential length).

[0046] The circumferential length of the integrated foil 1 (21) is greater than that of the bearing sleeve (5), and it is rolled into a radial two-ring structure, placed inside the bearing sleeve (5). There is no support unit on the inner ring surface, and the first support unit (1) and the second support unit (3) are fixed to the inner and outer surfaces of the outer ring, respectively. The inner ring is freely overlapped on the second support unit (3) of the outer ring, and the other end of the outer ring is fixed to the bearing sleeve. The integrated foil 1 (21) serves as the basis for elastic deformation of the bearing, and the inner surface of its inner ring provides a bearing surface for the lubricating film, thus achieving a higher degree of integration.

[0047] Example 4: Figure 5 and 6 As shown, the present invention provides another radial hydrodynamic bearing, including a bearing sleeve and at least two foil-type elastic support assemblies. The foil-type elastic support assembly consists of an integral foil 2 (22) and strip foils 1 (13) and 2 (33) fixed to a local surface, the local surface being half the circumferential length. The portion of the integral foil 2 (22) without strip foil overlaps with the strip foil 2 (33) of the adjacent integral foil 2 (22). The circumferentially distributed foil-type elastic support assemblies overlap to form the lubrication film bearing surface and the bearing elastic support structure of the radial bearing. Multiple base foils are circumferentially distributed and overlapped to form a full circumferential support. Each base foil itself is a complete "double-sided integrated" unit, its unsupported unit portion serving as the lubrication film bearing surface.

[0048] The present invention also provides a radial hydrodynamic bearing, comprising a bearing sleeve, an independent radial top foil, and a foil-type elastic support assembly as described in Example 1. The independent radial top foil is structurally identical to the flat foil (2), being a rectangular foil, and is disposed within the bearing sleeve (3) to form an air film with the rotor. The foil-type elastic support assembly is disposed between the bearing sleeve and the independent radial top foil. In this example, inclined foil 1 (11), inclined foil 2 (12), inclined foil 3 (31), and inclined foil 4 (32) are respectively fixed to the upper and lower surfaces of the base foil in the foil-type elastic support assembly. The foil-type elastic support assembly is assembled by welding in a planar state, and then rolled up together with the independent radial top foil and placed inside the bearing sleeve.

[0049] The radial deformation of the independent radial top foil between the circumferentially adjacent inclined foil 3 (31) or inclined foil 4 (32) is greater than that of the independent radial top foil above it, thus naturally forming a "groove" at an acute angle along the axis between the independent radial top foil and the rotor. During high-speed rotation, fluid is drawn into and accumulates in these "grooves", and converges from the axial ends of the independent radial top foil towards the center, generating higher lubricating film pressure, i.e., "aggregation effect", which can significantly improve the dynamic pressure bearing capacity of the bearing.

[0050] Example 5: Figure 7 As shown, the foil-type elastic support assembly is a fan-shaped structure, consisting of a fan-shaped foil (7) and circumferentially distributed inclined foils 1 (11) and 2 (12), 3 (31) and 4 (32). The inclined foils 1 (11) and 2 (12) are arranged radially in sequence and fixed on one side surface of the fan-shaped foil (7). The inclined foils 3 (31) and 4 (32) are arranged radially in sequence and fixed on the other side surface of the fan-shaped foil (7). The inclined foils 1 (11) of the fan-shaped foil (7) are placed within the distance between two circumferentially adjacent inclined foils 3 (31), and the inclined foils 2 (12) of the fan-shaped foil (7) are placed within the distance between two circumferentially adjacent inclined foils 4 (32).

[0051] Example 6: As Figure 8 As shown, in this case, the foil-type elastic support assembly is a fan-shaped support assembly (6), which consists of a fan-shaped foil (7), a strip foil 1 (13) fixed on one side of the fan-shaped foil (7), and a strip foil 2 (33) fixed on the other side of the fan-shaped foil (7). The strip foil 1 (13) and the strip foil 2 (33) extend radially and are distributed circumferentially, with the strip foil 1 (13) positioned within the distance between adjacent circumferential strip foils 2 (33). Multiple fan-shaped foils (7) are distributed circumferentially to form a ring support structure, with one end of each fan-shaped foil (7) fixed and the other end free.

[0052] Example 7: As Figure 10 As shown, in this case, the foil-type elastic support assembly consists of a circumferentially distributed fan-shaped foil (7), a circumferential foil 1 (14), and a circumferential foil 2 (34). The circumferential foil 1 (14) and the circumferential foil 2 (34) extend circumferentially and are radially distributed. The circumferential foil 1 (14) is placed within the interval between adjacent circumferential foils 2 (34).

[0053] Example 8: Refer to Figure 11 As shown, in this case, the foil-type elastic support assembly consists of an integral fan-shaped foil (72), strip foil 1 (13), and strip foil 2 (33). The circumferential distribution range of strip foil 1 (13) and strip foil 2 (33) occupies half of the circumferential length of the integral fan-shaped foil (72). The integral fan-shaped foil (72) is circumferentially distributed, and the unsupported unit portion of the integral fan-shaped foil (72) of one component overlaps with the strip foil 3 (33) in the adjacent component. The unsupported unit portion of the integral fan-shaped foil (72) is a free end, and the other end is a fixed end.

[0054] Example 9: Refer to Figure 12 As shown, this embodiment applies the sector support assembly of Embodiment 6 to a thrust hydrodynamic bearing. The bearing includes an annular base (8), individual sector foils (71), and a sector support assembly (6).

[0055] The independent fan-shaped foils (71) are fan-shaped and distributed circumferentially, and adjacent independent fan-shaped foils (71) do not contact each other.

[0056] The shape of the fan-shaped foil (7) is adapted to the shape of the independent fan-shaped foil (71), forming a fan shape. One end of the fan-shaped foil (7) and the independent fan-shaped foil (71) are welded and fixed to the annular base (8), while the rest are free. Multiple fan-shaped support components (6) are distributed circumferentially, and the fan-shaped support components (6) are disposed between the independent fan-shaped foil (71) and the annular base (8), with the strip foil 2 (33) in contact with the independent fan-shaped foil (71) and the strip foil 1 (13) in contact with the annular base (8).

[0057] During operation, the axial load is applied to the independent sector foil (71) and transmitted to the sector foil (7) through the strip foil 3 (33). Since the strip foil 1 (13) and the strip foil 2 (33) are arranged at intervals, the sector foil (7) undergoes bending deformation, which transmits the load to the strip foil 2 (33) and finally to the annular base (8).

[0058] The technical advantage of this embodiment is that by applying the foil-type elastic support assembly to the thrust bearing, the modularization and integration of the elastic support structure of the thrust bearing are realized. Each independent sector foil (71) corresponds to an independent sector support assembly (6), which can be designed and replaced independently, improving the flexibility of design and the convenience of maintenance. At the same time, since the strip foil 1 (13) and the strip foil 2 (33) are arranged at intervals, the sector foil (7) undergoes bending deformation, providing better elastic characteristics.

[0059] Manufacturing method description: 1) Prepare basic foil sheets and cut them into the required shapes and sizes according to design requirements; 2) Prepare multiple first support units (such as inclined foil, strip foil, circumferential foil) and multiple second support units, and make them into the required shapes by methods such as stamping, laser cutting or wire cutting; 3) Using methods such as laser welding, resistance welding, or brazing, the first support unit is welded to the first side surface of the base foil according to the designed distribution position; 4) Using the same method, weld the second support unit to the second side surface of the base foil according to the designed distribution position, and ensure that the first support unit and the second support unit are spaced apart in the distribution direction; 5) For applications requiring bending (such as radial bearings), the welded components are bent into the desired arc shape in a mold; 6) Perform necessary heat treatment and surface treatment to eliminate residual stress and improve fatigue performance.

[0060] By adjusting the positioning accuracy on the welding fixture, the spacing accuracy between the first support unit and the second support unit can be ensured to meet the design requirements.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, alterations, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A foil-type elastic support assembly, characterized in that, include: Basic foil; Multiple first support units are fixedly connected to the first side surface of the base foil; Multiple second support units are fixedly connected to the second side surface of the base foil opposite to the first side; The first support unit and the second support unit are spaced apart in their distribution direction, such that each first support unit is located in the interval area between two adjacent second support units in the distribution direction; the first support unit and the second support unit are integrated into an integral assembly through the base foil to form an integrated bending force transmission structure.

2. The foil-type elastic support assembly according to claim 1, characterized in that: The first support unit and the second support unit are selected from one of strip foil and circumferential foil; specifically, strip foil 1 (13) and strip foil 2 (33), or specifically, circumferential foil 1 (14) and circumferential foil 2 (34), the extension direction of which is perpendicular to the distribution direction.

3. The foil-type elastic support assembly according to claim 1, characterized in that, The first support unit and the second support unit are both composed of multiple pairs of inclined foils, including inclined foil 1 (11), inclined foil 2 (12), inclined foil 3 (31) and inclined foil 4 (32), and the two inclined foils in the same pair are not parallel to each other.

4. The foil-type elastic support assembly according to claim 1, characterized in that, The first support unit and the second support unit are arranged in at least one row in a direction perpendicular to the distribution direction, and each row includes a plurality of support units spaced apart along the distribution direction.

5. The foil-type elastic support assembly according to claim 1, characterized in that: The base foil is selected from one of flat foil (2), integral foil 1 (21) and integral foil 2 (22), and one end of the base foil is fixed while the other end is free.

6. The foil-type elastic support assembly according to claim 1, characterized in that: The base foil is selected from one of the fan-shaped foil (7) and the integral fan-shaped foil (72). The plurality of the base foils are configured to be distributed circumferentially to form an annular support structure. One end of each base foil is fixed in the circumferential direction and the other end is free.

7. The foil-type elastic support assembly according to claim 1, characterized in that: At least a portion of the surface of the base foil forms a hydrodynamic lubrication film support surface.

8. The foil-type elastic support assembly according to claim 1, characterized in that: The foil-type elastic support assembly is configured as a multi-stage elastic support system; the multi-stage elastic support system includes at least two of the foil-type elastic support assemblies, which are stacked sequentially in the radial or axial direction; In the two adjacent foil-type elastic support assemblies, the first support unit of the upper assembly and the second support unit of the lower assembly are in direct contact to form an interstage support structure.

9. The foil-type elastic support assembly according to claim 1, characterized in that: The foil-type elastic support assembly is applied to a radial hydrodynamic bearing, which includes a bearing sleeve (3) and at least one of the foil-type elastic support assemblies within the bearing sleeve. The base foil is selected from one of integral foil 1 (21) and integral foil 2 (22) to provide an attachment base for the support unit and a lubricating film support plane; When the base foil is the integral foil 1 (21), its circumferential length is greater than the inner circumferential length of the bearing sleeve (3). The integral foil 1 (21) is rolled into two radial inner and outer rings. The second support unit and the first support unit are fixed on the upper and lower surfaces of its outer ring. The inner ring surface has no support unit and overlaps with the second support unit of the outer ring. The inner surface of the inner ring constitutes the lubricating film support surface. When the base foil is the integral foil 2 (22), its circumferential length is less than the inner circumferential length of the bearing sleeve (3). Multiple integral foils 2 (22) are distributed circumferentially. The first support unit and the second support unit are only fixed to a part of the surface of the integral foil 2 (22), and the remaining surfaces have no support units. In two adjacent integral foils 2 (22), the unsupported part of one overlaps the second support unit of the other. The inner surfaces of the unsupported parts of each integral foil 2 (22) together constitute the lubricating film support surface.

10. The foil-type elastic support assembly according to claim 1, characterized in that: The foil-type elastic support assembly is applied to a thrust hydrodynamic bearing, which includes an annular base (8), and a plurality of the foil-type elastic support assemblies are distributed and fixed on the annular base (8) in a circumferential direction; The base foil is an integral fan-shaped foil (72). The first support unit and the second support unit are only fixed to a portion of the surface of the integral fan-shaped foil (72), and the remaining surfaces have no support units. In two adjacent integral fan-shaped foils (72), the unsupported portion of one integral fan-shaped foil (72) overlaps with the second support unit of the other integral fan-shaped foil (72). The upper surfaces of the unsupported portions of each integral fan-shaped foil (72) together constitute the lubricating film support surface.

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