Dynamic air pressure thrust bearing, high speed motor and blower

Abstract

The utility model discloses a kind of dynamic pressure air thrust bearing, high-speed motor and air blower, it is related to air bearing technical field, wherein, this kind of dynamic pressure air thrust bearing includes bottom plate and supporting assembly, supporting assembly includes top layer foil and elastic support unit, top layer foil has the first area and second area being set along first direction, top layer foil first area is connected with bottom plate away from second area side, top layer foil is in use, the plane of first area and the plane of second area are set with angle of inclination;Elastic support unit includes wave foil and rigid support flat plate, wave foil is located on bottom plate and is below top layer foil, rigid support flat plate is clamped between wave foil and the second area of top layer foil, the thickness of rigid support flat plate is greater than the thickness of top layer foil;The technical scheme provided by the utility model can make dynamic pressure air thrust bearing more balanced when load, so that the supporting effect of dynamic pressure air thrust bearing is more stable.

Description

Technical Field

[0001] This utility model relates to the field of air bearing technology, and in particular to a dynamic pressure air thrust bearing, a high-speed motor, and a blower. Background Technology

[0002] Dynamic air thrust bearings are non-contact sliding bearings that use gas as the lubricating medium. They offer advantages such as oil-free lubrication, low friction, low wear, low noise, and easy maintenance. The principle involves a high-speed rotating rotor drawing lubricating gas into a wedge-shaped gap between the rotor and the bearing surface. Under the influence of geometric compression and viscous resistance, the fluid's kinetic energy is converted into pressure potential energy, pushing open the thrust disc and forming a lubricating gas film, thus achieving non-contact gas film bearing.

[0003] Existing hydrodynamic air thrust bearings are prone to problems such as poor lubrication, localized uneven wear, and insufficient load-bearing capacity under high loads or load fluctuations due to insufficient overall support stiffness. Utility Model Content

[0004] The main purpose of this invention is to propose a dynamic air thrust bearing, a high-speed motor, and a blower, which aims to solve the problem that existing dynamic air thrust bearings are prone to localized depressions under load.

[0005] To achieve the above objectives, this utility model proposes a hydrodynamic air thrust bearing, comprising: Base plate; A support assembly is disposed on the base plate. The support assembly includes a top foil and an elastic support unit. The top foil has a first region and a second region arranged side by side along a first direction. The side of the first region of the top foil away from the second region is connected to the base plate. The top foil is configured such that when it is put into use, the plane where the first region is located is set at an angle to the plane where the second region is located. The elastic support unit includes a corrugated foil and a rigid support plate. The corrugated foil is disposed on the base plate and located below the top foil. The rigid support plate is sandwiched between the corrugated foil and the second region of the top foil. The thickness of the rigid support plate is greater than the thickness of the top foil.

[0006] In one embodiment, the corrugated foil includes a first connecting segment, a second connecting segment, and a plurality of corrugated arch segments. The plurality of corrugated arch segments, the second connecting segment, and the first connecting segment are arranged sequentially along the first direction. The first connecting segment is connected to the base plate, the second connecting segment is connected to the rigid support plate, the arch tops of the plurality of corrugated arch segments abut against the rigid support plate, and the arch feet of the plurality of corrugated arch segments abut against the base plate.

[0007] In one embodiment, the second connecting segment includes a first sidewall, a top wall, and a second sidewall connected in sequence. The top wall is spaced apart from the bottom plate. The first sidewall and the second sidewall are located on both sides of the top wall. The first sidewall, the top wall, and the second sidewall together form a supporting arch with an opening facing the bottom plate. The side of the first sidewall away from the top wall is connected to the first connecting segment, and the side of the second sidewall away from the top wall is connected to the corrugated arch segment. The rigid support plate has a connecting part and an abutting part. The connecting part is fixedly connected to the surface of the top wall away from the bottom plate, and the abutting part covers a plurality of the corrugated sections.

[0008] In one embodiment, the straight-line distance between the top wall and the bottom plate is equal to the straight-line distance between the arch crowns of the plurality of wave arch segments and the bottom plate; And / or, the spacing between the first sidewall and the second sidewall along the first direction gradually decreases from the bottom plate to the top wall.

[0009] In one embodiment, the rigid support plate is provided with at least one first dividing groove, the first dividing groove passing through both sides of the rigid support plate in the thickness direction, the first dividing groove passing through the abutment portion from one end away from the connecting portion along the first direction, the first dividing groove being used to divide the rigid support plate into at least two sub-rigid support plates.

[0010] In one embodiment, the corrugated foil is provided with at least one second dividing groove, the second dividing groove corresponding to the first dividing groove along the thickness direction of the elastic support unit; And / or, the width of the first dividing groove is 0.3mm~0.8mm; And / or, the width of the second dividing groove is 0.3mm~0.8mm.

[0011] In one embodiment, the thickness of the base plate is 2mm to 4mm; And / or, the thickness of the top foil is 0.1mm~0.2mm; And / or, the thickness of the corrugated foil is 0.1 mm to 0.2 mm; And / or, the thickness of the rigid support plate is 0.4mm to 1mm.

[0012] In one embodiment, the base plate is arranged in a ring shape, the base plate has an inner ring edge and an outer ring edge, and the base plate is provided with a plurality of partition grooves, the plurality of partition grooves are arranged at intervals along the circumferential direction of the inner ring edge, and each partition groove is opened from the inner ring edge toward the outer ring edge to divide the base plate into a plurality of mounting parts; The number of the support components is multiple, and the multiple support components are respectively disposed on the multiple mounting parts; And / or, the outer periphery of the base plate is provided with multiple mounting grooves.

[0013] In one embodiment, the support assembly further includes a connector, wherein the first region of the top foil, away from the second region, is welded to the base plate via the connector, and the connector is spaced apart from the elastic support unit along the first direction.

[0014] In one embodiment, the first region and the second region are formed by the elastic deformation of the top foil after being subjected to force; Alternatively, the first region and the second region are formed by pre-bending the top foil, and the first region and the second region constitute a wedge-shaped structure, with the bottom of the first region being hollowed out; And / or, the upper surface of the top foil is provided with a molybdenum disulfide or polytetrafluoroethylene wear-resistant coating, the thickness of which is 0.02mm~0.04mm.

[0015] This utility model also proposes a high-speed motor, including the dynamic pressure air thrust bearing as described in the above embodiments.

[0016] This utility model also proposes a blower, including the dynamic pressure air thrust bearing or the high-speed motor as described in the above embodiments.

[0017] The dynamic air thrust bearing of this utility model includes a base plate and a support assembly. The support assembly includes a top foil and an elastic support unit. The elastic support unit includes a corrugated foil and a rigid support plate. The rigid support plate is disposed between the corrugated foil and the top foil. The rigid support plate can change the original line support between the corrugated foil and the top foil to surface support, so that the corrugated foil can better achieve elastic support for the second area of ​​the top foil through the rigid support plate, thereby balancing the elastic force on the bearing surface of the dynamic air thrust bearing and making the support effect of the dynamic air thrust bearing more stable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a structural embodiment of the hydrodynamic air thrust bearing provided by this utility model; Figure 2 for Figure 1 Exploded view of the thickness-direction structure of the central support assembly; Figure 3 for Figure 1 Schematic diagram of the exploded disassembly of the middle support assembly and the base plate; Figure 4 for Figure 2 Schematic diagram of the split structure of the middle support component; Figure 5 A schematic diagram of the structure of the corrugated foil provided by this utility model; Figure 6 A schematic diagram of the structure of the elastic support unit provided by this utility model; Figure 7 Another structural schematic diagram of the elastic support unit provided by this utility model; Figure 8 A schematic diagram of the structure of the base plate provided by this utility model; Figure 9 This is a schematic diagram of another embodiment of the hydrodynamic air thrust bearing provided by this utility model.

[0020] Explanation of icon numbers: 1. Dynamic air thrust bearing; 10. Base plate; 11. Partition groove; 11a. Mounting part; 12. Mounting groove; 20. Support assembly; 21. Top layer foil; 211. First region; 212. Second region; 22. Elastic support unit; 221. Corrugated foil; 2211. First connecting section; 2212. Second connecting section; 2212a. First side wall; 2212b. Top wall; 2212c. Second side wall; 2212d. Support arch; 2213. Corrugated arch section; 2213a. Second partition groove; 222. Rigid support plate; 222a. First partition groove; 23. Connector; 2. Rotary shaft assembly; 2a. Rotary shaft; 2b. Thrust disc.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Dynamic air thrust bearings are non-contact sliding bearings that use gas as the lubricating medium. They offer advantages such as oil-free lubrication, low friction, low wear, low noise, and easy maintenance. The principle involves a high-speed rotating rotor drawing lubricating gas into a wedge-shaped gap formed between the rotor and the bearing surface. Under the influence of geometric compression and viscous resistance, the fluid's kinetic energy is converted into pressure potential energy, pushing open the thrust disc and forming a lubricating gas film, thus achieving non-contact gas film bearing.

[0026] A dynamic air thrust bearing is generally composed of a bearing base plate, a bottom corrugated foil, and a top flat foil. The corrugated foil provides elastic support for the bottom of the top flat foil, but only the crest of the corrugated foil has actual contact with the flat foil. This causes the top flat foil at the trough of the corrugated foil to easily dent under high load due to the lack of bottom support. As a result, the top flat foil dents and becomes wavy under pressure, resulting in uneven lubrication gaps and pressure distribution, leading to insufficient load-bearing capacity and unstable operation.

[0027] To address the above problems, this utility model proposes a dynamic pressure air thrust bearing 1.

[0028] Please see Figures 1 to 4In one embodiment of this utility model, the dynamic pressure air thrust bearing 1 is characterized by comprising a base plate 10 and a support assembly 20. The support assembly 20 is disposed on the base plate 10 and includes a top foil 21 and an elastic support unit 22. The top foil 21 has a first region 211 and a second region 212 arranged along a first direction. The top foil 21 is disposed on the base plate 10 and is configured such that, when put into use, there is a height difference between the first region 211 and the second region 212. The elastic support unit 22 includes a corrugated foil 221 and a rigid support plate 222. The corrugated foil 221 is disposed on the base plate 10 and located below the top foil 21. The rigid support plate 222 is sandwiched between the corrugated foil 221 and the second region 212 of the top foil 21, and the thickness of the rigid support plate 222 is greater than the thickness of the top foil 211.

[0029] The dynamic air thrust bearing 1 in the technical solution of this utility model includes a base plate 10 and a support assembly 20. The base plate 10 is used to be fixedly connected to an external mounting surface, while the support assembly 20 is mounted on the surface of the base plate 10 away from the mounting surface.

[0030] In the embodiments of this utility model, such as Figure 1 As shown, the support assembly includes a top foil 21 and an elastic support unit 22 stacked sequentially from top to bottom. The top foil 21 includes a first region 211 and a second region 212 along a first direction. The first direction refers to the direction in which external gas rotates and flows on the upper surface of the top foil 21 after entering.

[0031] In this embodiment of the present invention, when the top foil 21 is put into use, that is, when external gas enters the upper surface of the top foil 21, the plane where the first region 211 is located is set at an angle to the plane where the second region 212 is located. The plane where the second region 212 is located can be parallel to the plane where the bottom plate is located. The first region 211 is set at an inclination relative to the second region 212. That is, the first region 211 is set at an inclination relative to both the second region 212 and the bottom plate. Since the first region 211 and the second region 212 are set side by side along the first direction, the cross-sections of the planes where they are located along the thickness direction are set at an angle. The height of the inclined surface of the first region 211 gradually increases along the first direction. When the dynamic pressure air thrust bearing 1 is put into use, the external gas will enter the second region 212 through the first region 211 under the action of the rotating shaft 2a, and form a lubricating gas film on the second region 212, so that the rotating shaft 2a and the dynamic pressure air thrust bearing 1 can achieve oil-free lubrication and contactless transmission.

[0032] In this embodiment of the invention, the top foil 21 can be a pre-bent or unbent thin plate. The pre-bent thin plate includes a first region 211 and a second region 212 connected at an angle. The first region 211 is used for gas entry, and the second region 212 is used for gas support. The first region 211 and the second region 212 together form a wedge structure, which facilitates the entry of external gas into the upper surface of the second region 212. It should be noted that the first region 211 and the base plate 10 are hollowed out. In this embodiment, gas can flow more smoothly through the stamped first region 211 to the surface of the second region 212. In another embodiment, the top foil 21 can be an unbent thin plate that is flat and elastic. When the plate is loaded, the first region 211, which is not supported by the elastic support unit 22, undergoes elastic deformation, thus forming the same wedge structure as described above. This wedge structure also facilitates the entry of external gas into the upper surface of the second region 212.

[0033] In this embodiment of the utility model, the rigid support plate 222 can be made of a rigid material, such as metal or hard plastic, etc., and mainly plays a planar support role so that the corrugated foil 221 strengthens the support effect on the top foil 21 through the rigid support plate 222.

[0034] The rigid support plate 222 can be a plate-shaped structure. The thickness of the rigid support plate 222 can be greater than the thickness of the top foil 21. The thickness of the rigid support plate 222 can be 0.4mm to 1mm or thicker. The specific thickness can be determined according to the actual situation. This specification does not limit this aspect in the embodiments.

[0035] The bending stiffness of the sheet material is proportional to the cube of its thickness. The bending stiffness of the rigid support plate 222 is much greater than that of the top foil 21. By replacing the corrugated foil 221 with the elastic support unit 22 as the bottom support for the top foil 21, the problem of the top foil 21 being sunken due to the lack of support in the troughs of the corrugated foil 221 can be improved or even eliminated (the sunken top foil 21 can lead to uneven air film gaps and insufficient load-bearing capacity), resulting in greater load-bearing capacity. Compared to the flexible top foil, the rigid support plate 222 can distribute the end face load to all the corrugations in the bottom layer, thus achieving higher overall stiffness and greater load-bearing capacity.

[0036] The outer contour of the rigid support plate 222 can coincide with the second region 210 of the top foil 21, providing support only on the non-bending side. This transforms the bottom support of the non-bending side of the top foil 21 from line contact with the corrugated foil to surface contact with the rigid support plate 222, effectively improving the support stiffness in the non-corrugated contact area and reducing or even eliminating the uneven deformation of the top foil 21 under high loads. Furthermore, the Coulomb friction between the rigid support plate 222 and the top foil 21 and the corrugated foil 221 increases system damping, better absorbing the energy of sudden loads and vibrations.

[0037] In this embodiment of the utility model, the rigid support plate 222 can be fixedly connected to the corrugated foil 221. For example, the rigid support plate 222 can be welded and fixed to the corrugated arch contact surface in the corrugated foil 221, or it can be welded and fixed to one end of the corrugated foil 221. In some embodiments, it can also be fixedly connected to the top layer foil 21. The specific connection can be determined according to the actual situation. This specification does not limit this aspect.

[0038] In some embodiments, to reduce resistance and improve the flow of external gas on the top foil 21, a lubricating coating can be provided on the upper surface of the top foil 21. This lubricating coating can be made of molybdenum disulfide or polytetrafluoroethylene (PTFE) wear-resistant coating, and its thickness is preferably 0.02 mm to 0.04 mm, but can be thinner or thicker. It is understood that a lubricating coating may not be applied; the specific application can be determined based on actual conditions, and this specification does not limit this.

[0039] In this embodiment of the present invention, one side of the top foil 21 can be fixedly connected to the base plate 10, that is, the side of the first region 211 away from the second region 212 is fixedly connected to the base plate 10, while the second region 212 of the top foil 21 is movably supported on the base plate 10 by the elastic support unit 22.

[0040] In this embodiment of the utility model, the elastic support unit 22 may include a corrugated foil 221 and a rigid support plate 222. The corrugated foil 221 is fixed on the base plate 10. The corrugated foil 221 may be fixedly connected to the base plate 10 at the starting end along the first direction, or fixedly connected to the base plate 10 at the end along the first direction, or fixedly connected to the base plate 10 at the middle part along the first direction. This embodiment of the specification does not limit this.

[0041] To facilitate the installation of the corrugated foil 221 onto the base plate 10, in this embodiment of the invention, the end of the corrugated foil 221 along the first direction can be fixedly connected to the base plate 10. This avoids the corrugated foil 221 being affected by the top foil 21 when it is installed on the base plate 10, or prevents the top foil 21 from being affected during installation. It is understood that in some embodiments, the starting segment of the corrugated foil 221 along the first direction can also be fixedly connected to the base plate 10. In this case, the corrugated foil 221 needs to be installed first, and then the top foil 21 can be fixedly installed after the corrugated foil 221 is installed. Alternatively, the arch of the corrugated foil 221 can be fixedly connected to the base plate 10. The method of fixing can be welding, gluing, or screwing; no further limitations are imposed.

[0042] Existing technologies suggest using a thick top-layer flat foil instead of a thin top-layer flat foil, or using multiple layers of top-layer flat foil instead of a single thin top-layer flat foil. However, if a thick top-layer flat foil is used, its high bending stiffness prevents it from naturally bending to form an inclined surface for gas entry. If a wedge-shaped structure is provided by pre-bending, the stability and consistency of the bending are difficult to guarantee due to material springback, resulting in significant process difficulty and cost issues. If multiple layers of thin top-layer flat foil are used, although this method can improve stiffness, it presents the problem of cumbersome assembly procedures.

[0043] The following explanation focuses on the fixed connection between the end of the corrugated foil 221 along the first direction and the base plate 10.

[0044] In this embodiment of the present invention, the rigid support plate 222 can be disposed between the corrugated foil 221 and the second region 212 of the top foil 21. The end of the rigid support plate 222 along the first direction is fixedly connected to the corrugated foil 221, and the lower surface of the rigid support plate 222 along the thickness direction, except for the part fixedly connected to the corrugated foil 221, is in contact with the corrugated foil 221. The upper surface of the rigid support plate 222 along the thickness direction overlaps with the lower surface of the top foil 21, that is, it supports the second region 212 of the top foil 21.

[0045] In this embodiment of the utility model, since a rigid support plate 222 is added between the corrugated foil 221 and the top foil 21, the original line support between the corrugated foil 221 and the top foil 21 can be changed to surface support. This allows the corrugated foil 221 to better provide elastic support to the second region 212 of the top foil 21 through the rigid support plate 222. In other words, the surface with the function of regulating gas pressure can achieve more balanced elastic support, thereby making the lubrication gap and pressure distribution uniform, so as to improve the load-bearing capacity of the dynamic air thrust bearing 1 and make its operation more stable.

[0046] In this embodiment of the utility model, in order to enable the rigid support plate 222 to be conveniently and stably fixedly mounted on the corrugated foil 221, such as Figure 5 As shown, the corrugated foil 221 includes a first connecting section 2211, a second connecting section 2212, and a plurality of corrugated arch sections 2213. The plurality of corrugated arch sections 2213, the second connecting section 2212, and the first connecting section 2211 are arranged along a first direction. The first connecting section 2211 is flush with the upper surface of the base plate 10 and is fixedly connected to the upper surface of the base plate 10. The second connecting section 2212 is spaced apart from the base plate 10. The rigid support plate 222 is disposed on the upper surface of the second connecting section 2212.

[0047] The other parts of the rigid support plate 222 are supported on multiple corrugated sections 2213. The corrugated sections 2213 are wavy in cross-section along the thickness direction. Each corrugated section 2213 includes an arch and two arch feet. The arch abuts against the rigid support plate 222, and the arch feet are supported on the base plate 10. The multiple corrugated sections 2213 provide elastic support to the top foil 21 located on the rigid support plate 222 in a balanced manner through the rigid support plate 222. This ensures that when the top foil 21 is subjected to external pressure, the pressure is applied to all corrugated sections 2213 through the rigid support plate 222, thereby preventing the top foil 21 from being locally dented and making the operation of the hydrodynamic air thrust bearing 1 more stable.

[0048] For example, such as Figures 5 to 7 As shown, since the corrugated section 221 and the rigid support plate 222 only have line contact, the weld point cannot be accurately positioned, which will cause the corrugated section 221 to deform after welding. In order to improve the welding strength, the second connecting section 2212 may include a first side wall 2212a, a top wall 2212b, and a second side wall 2212c connected in sequence. One side of the first side wall 2212a is connected to the first connecting section 2211, and the other side is connected to one side of the top wall 2212b. The other side of the top wall 2212b is connected to the second side wall 2212c. One side of 12c is connected, and the other side of the second sidewall 2212c is connected to one side of the nearest corrugated section 2213. It should be noted that the top wall 2212b is spaced apart from the bottom plate 10. The top wall 2212b can be approximately parallel to the bottom plate 10, and the lower surface of the top wall 2212b opposite to the bottom plate 10 is approximately in the same horizontal plane as the crown of the multiple corrugated sections 2213. That is, the lower surface of the top wall 2212b can smoothly abut against the crown of each corrugated section 2213.

[0049] In this embodiment of the present invention, the first sidewall 2212a and the second sidewall 2212c can be provided on both sides of the top wall 2212b. The first sidewall 2212a, the top wall 2212b and the second sidewall 2212c enclose a supporting arch 2212d. The opening of the supporting arch 2212d faces the bottom plate 10. The formation of the supporting arch 2212d can not only improve the structural strength of the corrugated foil 221, but also reduce the manufacturing cost of the corrugated foil 221.

[0050] In this embodiment of the present invention, the rigid support plate 222 includes a connecting part and an abutting part, wherein the abutting part and the connecting part extend along a first direction. The rigid support plate 222 is disposed on the top wall 2212b of the second connecting section 2212 of the corrugated foil 221 through the connecting part, while the abutting part of the rigid support plate 222 abuts against the arch tops of multiple corrugated sections 2213. Since the top wall 2212b is planar, the rigid support plate 222 can be more conveniently and more firmly fixed on the corrugated top wall 2212b.

[0051] In this embodiment of the present invention, the connecting part of the rigid support plate 222 can be fixedly connected to the side surface of the top wall 2212b away from the bottom plate 10 by welding. Since the top wall 2212b is flat, it can increase the contact cross section with the connecting part of the rigid support plate 222 compared with the corrugated section 2213, thereby making it easier and more secure to fix the corrugated foil 221 and the rigid support plate 222 to be fixedly connected.

[0052] In this embodiment of the invention, in order to maintain good elasticity and strong structural strength of the corrugated foil 221 after the second connecting section 2212 is provided, for example, as follows: Figures 5 to 8 As shown, the supporting arch 2212d formed by the second connecting segment 2212 of the corrugated foil 221 has a trapezoidal cross-section along the thickness direction. That is, the first sidewall 2212a and the second sidewall 2212c of the second connecting segment 2212 are gradually reduced in distance from the bottom plate 10 to the top wall 2212b along the first direction. This arrangement makes the second connecting segment 2212 not only have strong elasticity, but also more robust structure. In other embodiments, the cross-section of the supporting arch 2212d along the thickness direction can be arched or triangular, without much limitation.

[0053] In this embodiment of the utility model, in order to ensure that the stress distribution of the rigid support plate 222 generated by stamping is uniform and the springback is consistent, for example, as follows: Figure 1 and Figure 4 As shown, at least one first dividing groove 222a can be formed on the rigid support plate 222. The first dividing groove 222a penetrates both sides of the rigid support plate 222 in the thickness direction, and the first dividing groove 222a penetrates the abutment portion from the end away from the connecting portion along a first direction. Assuming that only one first dividing groove 222a is provided, the first dividing groove 222a can divide the rigid support plate 222 into two sub-rigid support plates 222. The two sub-rigid support plates 222 can adapt to load changes through independent deformation, maintaining the stability of the air film pressure and lubrication gap. Of course, in other embodiments, there are two first dividing grooves 222a. The two first dividing grooves 222a are arranged at intervals along the direction from the center to the edge of the base plate 10. Of course, the number of first dividing grooves 222a can also be designed to be more, such as 3 or 4, depending on factors such as size and stress concentration. There is no further limitation on this.

[0054] In this embodiment of the invention, to ensure uniform stress distribution and consistent springback of the corrugated foil 221 during stamping, the corrugated foil 221 is provided with at least one second dividing groove 2213a. This second dividing groove 221a serves the same function as the first dividing groove 222a, dividing the corrugated foil 221 into multiple sub-corrugated foils 221. The arrangement of these multiple sub-corrugated foils 221 is consistent with the arrangement of the multiple sub-rigid support plates 222, both of which can adapt to load changes through independent deformation, maintaining the stability of the air film pressure and lubrication gap. Of course, in other embodiments, there are two second dividing grooves 2213a, which are spaced apart along the direction from the center to the edge of the base plate 10. The number of second dividing grooves 2213a can also be designed to be more, such as three or four, depending on factors such as size and stress concentration; no further limitation is imposed.

[0055] In one embodiment, the first dividing groove 222a and the second dividing groove 2213a described above can be provided simultaneously. In this embodiment, the second dividing groove 2213a corresponds to the first dividing groove 222a along the thickness direction of the elastic support unit 22. That is, when the connecting part of the rigid support plate 222 is fixedly connected to the top wall 2212b, the second dividing groove 2213a and the first dividing groove 222a are arranged to overlap along the thickness direction. This arrangement not only divides the corrugated foil 2211 into multiple sub-corrugated foils 221, but also allows the multiple sub-corrugated foils 221 to be arranged one-to-one with multiple sub-rigid support plates 222. This arrangement can improve the overall stress distribution of the elastic support unit 22 to be more uniform and the rebound to be consistent. In this embodiment, the number of first partition grooves 222a may be the same as or different from the number of second partition grooves 2213a. Specifically, the number of first partition grooves 222a may exceed the number of second partition grooves 2213a, or the number of second partition grooves 2213a may exceed the number of first partition grooves 222a. No further limitations are imposed on this.

[0056] In this embodiment, the width of the first dividing groove 222a is preferably 0.3mm to 0.8mm; and / or, the width of the second dividing groove 221a is preferably 0.3mm to 0.8mm. It should be noted that the groove width refers to the distance between opposite sidewalls in the direction from the center of the bottom plate 10 to the edge. In this embodiment, the width of the first dividing groove 222a is preferably 0.31mm, 0.5mm, or 0.8mm, or slightly less than 0.3mm, or slightly greater than 0.8mm. Similarly, the width of the second dividing groove 221a is preferably 0.31mm, 0.5mm, or 0.8mm, or slightly less than 0.3mm, or slightly greater than 0.8mm. The specific width can be set according to actual conditions, and no further limitations are imposed.

[0057] In this embodiment of the utility model, the rigid support plate 222 can be an integrally formed plate structure, or it can be a rigid support plate 222 formed by fixing multiple independent plates together in a certain way. The multiple independent plates can be multiple sub-rigid support plates 222 as described above. Multiple sub-rigid support plates 222 are spliced ​​together to form a complete rigid support plate 222. The specific form of the rigid support plate 222 is not limited in the embodiments of this specification.

[0058] In this embodiment of the utility model, the wave foil 221 can be a single integral structure, or it can be a wave foil 221 formed by fixing multiple independent plates together in a certain way. The multiple independent plates can be multiple sub-wave foils 221 as described above. Multiple sub-wave foils 221 are spliced ​​together to form a complete wave foil 221. The specific form of the wave foil 221 is not limited in the embodiments of this specification.

[0059] In this embodiment of the utility model, the thickness of the base plate 10 is preferably 2mm to 4mm; the thickness of the base plate 10 can be 2mm, 3mm, or 4mm, etc., and of course it can be designed to other possible thicknesses. No further limitations are imposed on this.

[0060] In this embodiment of the present invention, the thickness of the top foil 21 is preferably 0.1mm to 0.2mm; the thickness of the top foil 21 can be 0.1mm or 0.2mm, and of course it can be designed to be other possible thicknesses, which are not limited in any way.

[0061] In this embodiment of the utility model, the thickness of the corrugated foil 221 is preferably 0.1mm to 0.2mm. The thickness of the corrugated foil 221 can be 0.1mm or 0.2mm, and of course, it can be designed to be other possible thicknesses. The cross section of the corrugated foil 221 along the thickness direction can be wavy. The height of the corrugated arches in the corrugated foil 221 can be the same or different. For example, two corrugated arches of different heights can be provided and designed alternately. For example, the corrugated foil 221 includes a first connecting segment 2211, a second connecting segment 2212, and a plurality of corrugated arch segments 2213. The second connecting segment 2212 includes a first sidewall 2212a, a top wall 2212b, and a second sidewall 2212c connected sequentially. The first sidewall 2212a, top wall 2212b, and second sidewall 2212c together form a supporting arch 2212d. This supporting arch 2212d can be consistent with the plurality of corrugated arch segments 2213, forming an arch shape, or it can be trapezoidal. It should be noted that the straight-line height from the top wall 2212b to the bottom plate 10 can be the same as or different from the straight-line height from the plurality of corrugated arch segments 2213 to the bottom plate 10; this is not limited in any way. In other embodiments, the straight-line height from each corrugated arch segment 2213 to the bottom plate 10 can also be the same or different, specifically set according to actual elasticity requirements; this is not limited in any way.

[0062] In this embodiment of the present invention, the thickness of the rigid support plate 222 is preferably 0.4mm to 1mm. The thickness of the rigid support plate 222 can be 0.4mm, 0.6mm, 0.8mm, or 1mm, and of course, it can be designed to have other possible thicknesses. No further limitations are imposed on this.

[0063] In this embodiment of the utility model, for example, such as Figure 8 As shown, in this embodiment, the base plate 10 is annular, meaning that an annular hole is provided in the center of the base plate 10. The base plate 10 has an inner ring edge and an outer ring edge, and multiple partition grooves 11 can also be provided on the base plate 10. The multiple partition grooves 11 are spaced apart around the inner ring edge, and each partition groove 11 is opened from the inner ring edge to the outer ring edge but does not penetrate the outer ring edge. This arrangement can divide the base plate 10 into multiple mounting parts 11a. It should be noted that in this embodiment, the number of support components 20 can also be multiple, and the number of mounting parts 11a corresponds to the number of support components 20. Generally, if the number of support components is even, then the number of mounting parts 11a is also even. Multiple support components 20 are provided one-to-one on multiple mounting parts 11a. This arrangement can prevent the support stability from being affected by the overall deformation of the base plate 10 when multiple support components 20 are put into use.

[0064] In order to facilitate the fixed installation of the base plate 10 with the mounting surface, in this embodiment, a plurality of mounting grooves 12 can be provided on the outer periphery of the base plate 10, that is, a plurality of mounting grooves 12 are provided along the outer ring edge of the base plate 10 at intervals around the axial direction. The mounting grooves 12 are U-shaped. This arrangement facilitates the installation and fixing of the base plate 10.

[0065] In this embodiment of the utility model, the support assembly 20 may further include a connector 23, wherein the connector 23 is disposed on the base plate 10 and is located on the side of the first region 211 of the top foil 21 away from the second region 212, that is, the side of the top foil 21 located upstream in the first direction is fixedly connected to the base plate 10 by the connector 23. The connector 23 is fixed to the base plate 10 by welding, and the top foil 21 is also fixed to the connector 23 by welding. It should be noted that the connector 23 is arranged in a long strip shape, and the connector 23 is disposed on the base plate 10 along the direction from the center to the edge of the base plate 10. With this arrangement, it is convenient to install the top foil 21 on the base plate 10.

[0066] For example, in this embodiment, the connector 23 is spaced apart from the elastic support unit 22 along the first direction, that is, the two are separated. The sum of the thickness of the connector 23 and the thickness of the top foil 21 is less than the thickness of the elastic support unit 22 after being compressed under load. This arrangement allows part of the first region 211 to be suspended on the base plate 10. When the first region 211 is affected by external gas pressure, the first region 211 of the top foil 21 will deform due to the force, thereby forming an inclined surface, which allows gas to enter better. Therefore, when it is necessary to adjust the inclination angle of the inclined surface, connectors 23 of different thicknesses can be selected. This can be determined according to the actual situation and is not limited in too much.

[0067] This utility model also proposes a high-speed motor, which may include a dynamic pressure air thrust bearing 1. The specific structure of the dynamic pressure air thrust bearing 1 is as described in the above embodiments. Since this high-speed motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. It should be noted that the high-speed motor generally includes two sets of dynamic pressure air thrust bearings 1, which are respectively disposed at the two axial ends of the rotating shaft 2a assembly 2. The rotating shaft 2a assembly 2 includes a rotating shaft 2a and a thrust disk 2b (e.g., Figure 9As shown, when the shaft 2a rotates, the thrust disk 2b rotates synchronously. When the thrust disk 2b rotates to a certain speed, it drives the gas through the first region 211 of the dynamic pressure air thrust bearing 1 into the second region 212. The high-pressure gas in the second region 212 pushes the thrust disk 2b away, so that the shaft 2a assembly 2 is in a suspended state and does not contact the dynamic pressure air thrust bearings 1 at both ends. This achieves efficient non-contact air film bearing. This type of high-speed motor can be used in air blowers, centrifugal fans, or blowers, without further limitations.

[0068] This utility model also proposes a blower, which may include a dynamic pressure air thrust bearing 1 or a high-speed motor. The specific structure of the dynamic pressure air thrust bearing 1 or the high-speed motor is as described in the above embodiments. Since the high-speed motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0069] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A hydrodynamic air thrust bearing, characterized in that, include: Base plate; A support assembly is disposed on the base plate. The support assembly includes a top foil and an elastic support unit. The top foil has a first region and a second region arranged side by side along a first direction. The side of the first region of the top foil away from the second region is connected to the base plate. The top foil is configured such that when it is put into use, the plane where the first region is located is set at an angle to the plane where the second region is located. The elastic support unit includes a corrugated foil and a rigid support plate. The corrugated foil is disposed on the base plate and located below the top foil. The rigid support plate is sandwiched between the corrugated foil and the second region of the top foil. The thickness of the rigid support plate is greater than the thickness of the top foil.

2. The hydrodynamic air thrust bearing as described in claim 1, characterized in that, The corrugated foil includes a first connecting section, a second connecting section, and multiple corrugated arch sections. The multiple corrugated arch sections, the second connecting section, and the first connecting section are arranged sequentially along the first direction. The first connecting section is connected to the base plate, the second connecting section is connected to the rigid support plate, the arch tops of the multiple corrugated arch sections abut against the rigid support plate, and the arch feet of the multiple corrugated arch sections abut against the base plate.

3. The hydrodynamic air thrust bearing as described in claim 2, characterized in that, The second connecting section includes a first side wall, a top wall, and a second side wall connected in sequence. The top wall is spaced apart from the bottom plate. The first side wall and the second side wall are located on both sides of the top wall. The first side wall, the top wall, and the second side wall together form a supporting arch with an opening facing the bottom plate. The side of the first side wall away from the top wall is connected to the first connecting section, and the side of the second side wall away from the top wall is connected to the wave arch section. The rigid support plate has a connecting part and an abutting part. The connecting part is fixedly connected to the surface of the top wall away from the bottom plate, and the abutting part covers a plurality of the corrugated sections.

4. The hydrodynamic air thrust bearing as described in claim 3, characterized in that, The straight-line distance between the top wall and the bottom plate is equal to the straight-line distance between the arch tops of the plurality of wave arch segments and the bottom plate; And / or, the spacing between the first sidewall and the second sidewall along the first direction gradually decreases from the bottom plate to the top wall.

5. The hydrodynamic air thrust bearing as described in claim 3, characterized in that, The rigid support plate is provided with at least one first dividing groove, which penetrates both sides of the rigid support plate in the thickness direction. The first dividing groove passes through the abutment portion from one end away from the connecting portion along the first direction. The first dividing groove is used to divide the rigid support plate into at least two sub-rigid support plates.

6. The hydrodynamic air thrust bearing as described in claim 5, characterized in that, The corrugated foil is provided with at least one second dividing groove, and the second dividing groove corresponds to the first dividing groove along the thickness direction of the elastic support unit; And / or, the width of the first dividing groove is 0.3mm~0.8mm; And / or, the width of the second dividing groove is 0.3mm~0.8mm.

7. The hydrodynamic air thrust bearing as described in any one of claims 1 to 6, characterized in that, The thickness of the base plate is 2mm~4mm; And / or, the thickness of the top foil is 0.1mm~0.2mm; And / or, the thickness of the corrugated foil is 0.1 mm to 0.2 mm; And / or, the thickness of the rigid support plate is 0.4mm to 1mm.

8. The hydrodynamic air thrust bearing as described in any one of claims 1 to 6, characterized in that, The base plate is arranged in a ring shape, and the base plate has an inner ring edge and an outer ring edge. The base plate is provided with a plurality of partition grooves, which are arranged at intervals along the circumference of the inner ring edge. Each partition groove is opened from the inner ring edge toward the outer ring edge to divide the base plate into a plurality of mounting parts. The number of the support components is multiple, and the multiple support components are respectively disposed on the multiple mounting parts; And / or, the outer periphery of the base plate is provided with multiple mounting grooves.

9. The hydrodynamic air thrust bearing as described in any one of claims 1 to 6, characterized in that, The support assembly also includes a connector, wherein the first region of the top foil, away from the second region, is welded to the base plate via the connector; The connector is spaced apart from the elastic support unit along the first direction.

10. The hydrodynamic air thrust bearing as described in claim 9, characterized in that, The first region and the second region are formed by the elastic deformation of the top foil after being subjected to force; Alternatively, the first region and the second region are formed by pre-bending the top foil, and the first region and the second region constitute a wedge-shaped structure, with the bottom of the first region being hollowed out; And / or, the upper surface of the top foil is provided with a molybdenum disulfide or polytetrafluoroethylene wear-resistant coating, the thickness of which is 0.02mm~0.04mm.

11. A high-speed motor, characterized in that, Including the hydrodynamic air thrust bearing as described in any one of claims 1 to 10.

12. A blower, characterized in that, Includes a hydrodynamic air thrust bearing as described in any one of claims 1 to 10 or a high-speed motor as described in claim 11.

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