WO2022067911A1 - 径向气体箔片轴承 - Google Patents

径向气体箔片轴承 Download PDF

Info

Publication number
WO2022067911A1
WO2022067911A1 PCT/CN2020/123075 CN2020123075W WO2022067911A1 WO 2022067911 A1 WO2022067911 A1 WO 2022067911A1 CN 2020123075 W CN2020123075 W CN 2020123075W WO 2022067911 A1 WO2022067911 A1 WO 2022067911A1
Authority
WO
WIPO (PCT)
Prior art keywords
foil
elastic
support
circumferential direction
bearing
Prior art date
Application number
PCT/CN2020/123075
Other languages
English (en)
French (fr)
Inventor
赵雪源
张云
余睿
李子君
熊振宇
李超智
Original Assignee
中车株洲电机有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中车株洲电机有限公司 filed Critical 中车株洲电机有限公司
Publication of WO2022067911A1 publication Critical patent/WO2022067911A1/zh

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F16C17/024—Sliding-contact bearings for exclusively rotary movement for radial load only with flexible leaves to create hydrodynamic wedge, e.g. radial foil bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/02—Sliding-contact bearings

Definitions

  • the invention relates to the technical field of gas bearings, in particular to a radial gas foil bearing.
  • the gas foil bearing is a self-acting elastically supported gas dynamic pressure bearing. It consists of components such as bearing sleeves, elastic support foils and top foils. Compared with traditional rolling and sliding bearings, it has a series of advantages such as high speed, good precision, high reliability, oil-free lubrication, low friction loss and can work in high temperature environment. and other fields have broad application prospects.
  • the elastic support structure is the key component, which should have a certain structural rigidity and structural damping, so that the bearing can generate enough bearing capacity and the ability to buffer shock vibration during operation.
  • the top foil is formed by rolling a single flat foil to form a smooth and flexible inner surface of the bearing; the corrugated foil is processed from a flat foil to have axial extension and circumferential The distributed arc-shaped corrugations protrude and are crimped into a circular arc shape; the corrugated foil is located between the bearing sleeve and the top foil to provide flexible support for the top foil.
  • One end of the top foil and the corrugated foil is fixed on the inner surface of the bearing sleeve, and the other end is free and unconstrained.
  • the purpose of the present invention is to provide a radial gas foil bearing, which is beneficial to reduce the processing difficulty and prolong the service life of the gas foil bearing.
  • the present invention provides the following technical solutions:
  • a radial gas foil bearing comprising: a bearing sleeve and a foil assembly arranged inside the bearing sleeve; one end of the foil assembly in the circumferential direction is fixed to the bearing sleeve and the other end is free
  • the foil assembly includes an elastic support unit and a top foil arranged inside the elastic support unit.
  • the elastic support unit includes a first elastic foil and a second elastic foil arranged in sequence from the inside to the outside.
  • the first elastic foil is sequentially spaced along the circumferential direction with a number of first support bars that fit with the top foil
  • the third elastic foil is sequentially spaced along the circumferential direction with a number of first support strips a third support strip that fits with the second elastic foil
  • the first support strip and the third support strip are arranged staggered in the circumferential direction, so that the first support strip is pressed Part of the structure of the second elastic foil can be pressed into the gap between the two adjacent third support bars in the circumferential direction.
  • a part of the first elastic foil located between two adjacent first support bars is provided with through holes in the radial direction.
  • a portion of the third elastic foil located between two adjacent third support bars is provided with a through hole in the radial direction.
  • the second elastic foil is a complete sheet without a hollow structure.
  • At least two of the foil assemblies are arranged in sequence in the bearing sleeve in the circumferential direction.
  • one end of the foil assembly in the circumferential direction is inserted and fixed in the slot of the bearing sleeve.
  • the first support strips are arranged at equal intervals on the first elastic foil
  • the third support strips are arranged at equal intervals on the third elastic foil
  • the first support strips and the The circumferential lengths of the third support bars are the same.
  • the center line of the first support bar in the circumferential direction is aligned with the center line of the gap between the two third support bars in the circumferential direction.
  • the radial gas foil bearing provided by the present invention includes: a bearing sleeve and a foil assembly arranged inside the bearing sleeve; one end of the foil assembly in the circumferential direction is fixed to the bearing sleeve and the other end is a free end, and the foil assembly is a free end.
  • the assembly includes an elastic support unit and a top foil arranged on the inner side of the elastic support unit.
  • the elastic support unit includes a first elastic foil, a second elastic foil and a third elastic foil arranged in sequence from the inside to the outside; the first elastic foil The foil is arranged with a plurality of first support bars that fit with the top foil at intervals along the circumferential direction, and the third elastic foil is arranged with a plurality of third support bars that fit with the second elastic foil at intervals along the circumferential direction; The first support strip and the third support strip are staggered in the circumferential direction, so that the first support strip can press the partial structure of the second elastic foil to the space between the two adjacent third support strips in the circumferential direction after being pressed. in the gap between.
  • the bearing air film pressure is exerted on the top foil and transmitted to the elastic support unit through the top foil.
  • the first support strip on the first elastic foil exerts pressure on the second elastic foil, and the third elastic foil
  • the third support strip exerts a supporting force on the second elastic foil, and since the third support strip and the first support strip are staggered in the circumferential direction, the first support strip can press the second elastic foil to two adjacent first support strips. In the gap between the three support bars, the second elastic foil is elastically deformed.
  • a laminated elastic support unit is used as the bearing elastic support structure, and the second elastic foil can be deformed by the staggered arrangement of the first support bar and the third support bar, so that elasticity can be realized.
  • Support no need to process arc-shaped corrugated protrusions, easy to process, can meet high precision requirements, change the thickness of the first elastic foil, the second elastic foil, the third elastic foil, the first elastic foil and the third elastic foil
  • the width of the gap between the foil strips can change the elastic support capacity of the bearing, which can meet the needs of mass production in engineering. Gas foil bearings have a long service life.
  • FIG. 1 is an exploded view of a specific embodiment 1 of the radial gas foil bearing provided by the present invention
  • FIG. 2 is an axial cross-sectional view of a specific embodiment 1 of the radial gas foil bearing provided by the present invention
  • Fig. 3 is the sectional partial enlarged view of the specific embodiment 1 of the radial gas foil bearing provided by the present invention
  • FIG. 4 is a schematic structural diagram of the connection position between the foil assembly and the bearing sleeve in the specific embodiment 1 of the radial gas foil bearing provided by the present invention
  • FIG. 5 is a schematic diagram of the elastic support unit in the specific embodiment 1 of the radial gas foil bearing provided by the present invention.
  • FIG. 6 is a force diagram of the second elastic foil before being compressed and deformed in the specific embodiment 1 of the radial gas foil bearing provided by the present invention
  • FIG. 7 is a force diagram of the second elastic foil after being compressed and deformed in the specific embodiment 1 of the radial gas foil bearing provided by the present invention.
  • FIG. 8 is a schematic structural diagram of a bearing sleeve in Embodiment 1 of the radial gas foil bearing provided by the present invention.
  • Embodiment 9 is a schematic structural diagram of the top foil in Embodiment 1 of the radial gas foil bearing provided by the present invention.
  • FIG. 10 is a schematic structural diagram of the first elastic foil in Embodiment 1 of the radial gas foil bearing provided by the present invention.
  • FIG. 11 is a schematic structural diagram of the second elastic foil in Embodiment 1 of the radial gas foil bearing provided by the present invention.
  • FIG. 12 is a schematic structural diagram of a third elastic foil in Embodiment 1 of the radial gas foil bearing provided by the present invention.
  • FIG. 13 is a schematic diagram of the elastic support unit in the second embodiment of the radial gas foil bearing provided by the present invention.
  • FIG. 14 is a schematic diagram of the elastic support unit in the third embodiment of the radial gas foil bearing provided by the present invention.
  • the core of the present invention is to provide a radial gas foil bearing, which is beneficial to reduce the processing difficulty and prolong the service life of the gas foil bearing.
  • a specific embodiment of the radial gas foil bearing provided by the present invention includes a bearing sleeve 1 and a foil assembly 2 arranged inside the bearing sleeve 1 .
  • the bearing sleeve 1 is cylindrical, and its inner wall is a finished surface to meet the design requirements of gas foil bearings.
  • one end of the foil assembly 2 in the circumferential direction is fixed on the bearing sleeve 1, and the other end is a free end, and the foil assembly 2 is curled in an arc shape as a whole.
  • only one foil assembly 2 is provided in the bearing sleeve 1 .
  • the foil assembly 2 includes an elastic support unit and a top foil 24 arranged inside the elastic support unit.
  • the top foil 24 is a complete monolithic structure, forming the flexible inner surface of the bearing.
  • the elastic support unit mainly plays the role of elastic deformation and support. As shown in FIG. 3 and FIG. 4 , the elastic support unit includes a first elastic foil 21 , a second elastic foil 22 and a third elastic foil which are sequentially arranged from the inside to the outside.
  • the foil 23 may only include the above three layers of elastic foil, and the third elastic foil 23 is in close contact with the inner peripheral surface of the bearing sleeve 1 .
  • the second elastic foil 22 is a complete sheet structure without a hollow structure.
  • the first elastic foil 21 is provided with a plurality of first support strips 211 that fit with the top foil 24 at intervals along the circumferential direction.
  • the first elastic foil 21 is located on the two first supports The portion between the strips 211 is radially spaced from the top foil 24 .
  • the third elastic foil 23 is provided with a plurality of third support bars 231 that fit with the second elastic foil 22 at intervals along the circumferential direction.
  • the third elastic foil 23 is located on two The portion between the third support bars 231 is radially spaced from the second elastic foil 22 .
  • the first support bar 211 and the third support bar 231 are staggered in the circumferential direction, so that the first support bar 211 can press the partial structure of the second elastic foil 22 to be adjacent in the circumferential direction after being pressed in the gap between the two third support bars 231.
  • the space in the bearing sleeve 1 is divided along the circumferential direction with the center line of the bearing sleeve 1 as the center, specifically the space divided between the adjacent dotted lines in FIG. 2 and FIG. 3 , each divided space
  • the first support bar 211 and the third support bar 231 are used to provide structural rigidity and structural damping to the bearing.
  • the first elastic foil 21 is mainly used to transmit the force of the top foil 24 to the second elastic foil 22 , so that the second elastic foil 22 is elastically deformed in the circumferential direction.
  • the second elastic foil 22 is a complete structure and mainly plays the role of circumferential elastic deformation.
  • the third elastic foil 23 is in contact with the inner surface of the bearing sleeve 1 , and mainly plays the role of supporting and leaving a deformation space for the second elastic foil 22 .
  • the bearing air film pressure P is exerted on the top foil 24 and transmitted to the elastic support unit through the top foil 24 , the first support bar on the first elastic foil 21 211 exerts a pressure F1 on the second elastic foil 22, and the third support bar 231 on the third elastic foil 23 exerts a support force F2 on the second elastic foil 22, because the third support bar 231 and the first support bar 211 Offset in the circumferential direction, so that the first support strip 211 can press the second elastic foil 22 into the gap between two adjacent third support strips 231, and the second elastic foil 22 is elastically deformed.
  • a laminated elastic support unit is used as the bearing elastic support structure, and the second elastic foil 22
  • the elastic support can be achieved by deformation, without the need to process arc-shaped corrugated protrusions, which is convenient for processing and can meet the requirements of high precision, changing the thickness of the first elastic foil 21, the second elastic foil 22, the third elastic foil 23
  • the width of the gap between the first elastic foil 21 and the third elastic foil 23 can change the elastic supporting capacity of the bearing and meet the needs of engineering mass production.
  • Arc-shaped corrugated protrusions, the radial gas foil bearing in this embodiment has a longer service life.
  • the portion of the first elastic foil 21 located between the two adjacent first support bars 211 is provided with through holes in the radial direction.
  • both ends in the axial direction are connected to each other, and a through hole is formed in the middle part in the axial direction to realize separation from the top foil 24 .
  • the part of the third elastic foil 23 located between two adjacent third support bars 231 is provided with through holes in the radial direction.
  • the two ends in the axial direction are connected to each other, and the middle part in the axial direction forms a through hole, so as to realize the connection with the second elastic foil. 22 separators.
  • the performance parameters of the bearing can be changed.
  • first elastic foil 21 , the second elastic foil 22 , the third elastic foil 23 and the top foil 24 can be directly formed by one-time stamping of a mold, which can further facilitate processing.
  • one end of the foil assembly 2 in the circumferential direction is inserted and fixed in the slot 11 of the bearing sleeve 1 .
  • a slot 11 is machined on the inner peripheral surface of the bearing sleeve 1 .
  • the top foil 24 and each elastic foil at the same circumferential end are inserted into the slot 11 to complete the installation.
  • the foil assembly 2 is installed on the bearing sleeve 1 by the positioning pin type positioning and installation method.
  • the foil assembly 2 is convenient to install, disassemble and replace, which can ensure the assembly accuracy and can improve the bearing assembly yield.
  • the foil assembly 2 can also be installed on the bearing sleeve 1 by means of bolt-pressed installation, spot-welded fixed installation, or the like.
  • the first support bars 211 are arranged at equal intervals on the first elastic foil 21
  • the third support bars 231 are arranged at equal intervals on the third elastic foil 23
  • the first support bars 211 are arranged at equal intervals on the third elastic foil 23 .
  • the circumferential length of the third support bar 231 is the same, so that the foil assembly 2 can always provide a relatively uniform elastic force to the rotor during the rotation of the rotor.
  • the center line of the first support bar 211 in the circumferential direction is aligned with the center line of the gap between the two third support bars 231 in the circumferential direction, which can further provide uniform force on the rotor. sex.
  • a compact elastic support unit is formed by stacking multiple layers of foils with staggered slots, which can significantly improve the bearing machining accuracy, simplify the machining process, and reduce the production cost.
  • it has the characteristics of multiple rigidity, high load force, strong ability to mitigate shock and vibration, and high bearing yield.
  • the foil assembly 2 is not limited to only one, and optionally, at least two foil assemblies 2 are sequentially arranged in the bearing sleeve 1 along the circumferential direction.
  • through holes may not be provided between adjacent first support bars 211 on the first elastic foil 21 and between adjacent third support bars 231 on the third elastic foil 23, for example, as shown in FIG.
  • a first groove 212 is provided between the adjacent first support bars 211 on the first elastic foil 21, and the groove bottom of the first groove 212 has a gap between the top foil 24 in the radial direction.
  • a third groove 232 is provided between the adjacent third support bars 231 on the elastic foil 23, and the groove bottom of the third groove 232 has a gap between the second elastic foil 22 and the second elastic foil 22 in the radial direction.
  • the grooves realize radial separation of the first elastic foil 21 and the third elastic foil 23 from adjacent components.
  • the elastic foils are not limited to three layers.
  • a fourth elastic foil 25 and a fifth elastic foil 26 can also be arranged on the outside of the third elastic foil 23 in sequence.
  • the fourth elastic foil The sheet 25 has the same structure as the second elastic foil 22
  • the fifth elastic foil 26 has the same structure as the third elastic foil 23
  • the fifth supporting strips 261 on the fifth elastic foil 26 and the third supporting strips 231 are on the circumference.
  • the upward staggering can also provide elastic support.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Support Of The Bearing (AREA)

Abstract

一种径向气体箔片轴承，包括轴承套筒（1）和箔片组件（2）；箔片组件（2）在周向上的一端固定于轴承套筒（1）且另一端为自由端，箔片组件（2）包括弹性支承单元和设于弹性支承单元内侧的顶箔（24），弹性支承单元中，包括由内至外依次设置的第一弹性箔片（21）、第二弹性箔片（22）和第三弹性箔片（23）；第一弹性箔片（21）沿周向依次间隔置若干个与顶箔（24）相贴合的第一支承条（211），第三弹性箔片（23）沿周向依次间隔设置若干个与第二弹性箔片（22）相贴合的第三支承条（231）；第一支承条（211）与第三支承条（231）在周向上相错开设置，以使第一支承条（211）在受压后能够将第二弹性箔片（22）的部分结构压至周向上相邻的两个第三支承条（231）之间的间隙中。相比具有圆弧状波纹凸起的弹性支承单元，该轴承便于加工且使用寿命较长。

Description

径向气体箔片轴承
本申请要求于2020年9月30日提交中国专利局、申请号为202011058371.7、发明名称为“径向气体箔片轴承”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及气体轴承技术领域，特别涉及一种径向气体箔片轴承。
背景技术
气体箔片轴承是一种自作用弹性支承气体动压轴承。它由轴承套筒、弹性支承箔片和顶层箔片等零部件构成。与传统滚动和滑动轴承相比，它具有转速高、精度好、可靠性高、无油润滑、摩擦损耗小和能在高温环境下工作等一系列优点，在航空航天、国防军工和民用流体机械等领域具有广阔的应用前景。
在气体箔片轴承中，弹性支承结构是关键部件，其应具有一定的结构刚度和结构阻尼，使轴承运行时产生足够的承载能力和缓冲冲击振动的能力。
目前一种广泛使用的气体箔片轴承中，顶箔由单片平整的箔片卷曲而成，形成轴承光滑的柔性内表面；波箔由平箔片加工成具有沿轴向延伸并沿周向分布的圆弧状波纹凸起，并被卷曲成型为圆弧状；波箔位于轴承套筒和顶箔之间，为顶箔提供柔性支承。顶箔和波箔的一端固定在轴承套筒的内表面，另一端自由无约束。
然而，由于需要加工出圆弧状波纹凸起，使得气体箔片轴承的加工相对较为复杂，另外，圆弧状波纹凸起在长时间使用后容易变形失效。
因此，如何降低气体箔片轴承的加工难度、延长轴承使用寿命，是本领域技术人员目前需要解决的技术问题。
发明内容
有鉴于此，本发明的目的是提供一种径向气体箔片轴承，有利于降低气体箔片轴承的加工难度、延长使用寿命。
为实现上述目的，本发明提供如下技术方案：
一种径向气体箔片轴承，包括：轴承套筒、设于所述轴承套筒内侧的箔片组件；所述箔片组件在周向上的一端固定于所述轴承套筒且另一端为自由端，所述箔片组件包括弹性支承单元和设于所述弹性支承单元内侧的顶箔，所述弹性支承单元中，包括由内至外依次设置的第一弹性箔片、第二弹性箔片和第三弹性箔片；所述第一弹性箔片沿周向依次间隔置若干个与所述顶箔相贴合的第一支承条，所述第三弹性箔片沿周向依次间隔设置若干个与所述第二弹性箔片相贴合的第三支承条；所述第一支承条与所述第三支承条在周向上相错开设置，以使所述第一支承条在受压后能够将所述第二弹性箔片的部分结构压至周向上相邻的两个所述第三支承条之间的间隙中。
优选地，所述第一弹性箔片上位于相邻两个所述第一支承条之间的部分沿径向贯穿设置通孔。
优选地，所述第三弹性箔片上位于相邻两个所述第三支承条之间的部分沿径向贯穿设置通孔。
优选地，所述第二弹性箔片为不具有镂空结构的完整片体。
优选地，至少两个所述箔片组件沿周向依次设于所述轴承套筒中。
优选地，所述箔片组件在周向上的一端插接固定于所述轴承套筒的插槽中。
优选地，所述第一支承条在所述第一弹性箔片上等间距排布，所述第三支承条在所述第三弹性箔片上等间距排布，且所述第一支承条与所述第三支承条的周向长度相同。
优选地，所述第一支承条在周向上的中心线与两个所述第三支承条之间的间隙在周向上的中心线对齐。
本发明提供的径向气体箔片轴承，包括：轴承套筒、设于轴承套筒内侧的箔片组件；箔片组件在周向上的一端固定于轴承套筒且另一端为自由 端，箔片组件包括弹性支承单元和设于弹性支承单元内侧的顶箔，弹性支承单元中，包括由内至外依次设置的第一弹性箔片、第二弹性箔片和第三弹性箔片；第一弹性箔片沿周向依次间隔置若干个与顶箔相贴合的第一支承条，第三弹性箔片沿周向依次间隔设置若干个与第二弹性箔片相贴合的第三支承条；第一支承条与第三支承条在周向上相错开设置，以使第一支承条在受压后能够将第二弹性箔片的部分结构压至周向上相邻的两个第三支承条之间的间隙中。
当轴承工作时，轴承气膜压力施加在顶箔上，并通过顶箔传递到弹性支承单元上，第一弹性箔片上的第一支承条对第二弹性箔片施加压力，第三弹性箔片上的第三支承条对第二弹性箔片施加支撑力，由于第三支承条与第一支承条在周向上相错开，使得第一支承条能够将第二弹性箔片压到两个相邻第三支承条之间的间隙中，第二弹性箔片发生弹性变形。
该径向气体箔片轴承中，利用叠片式的弹性支承单元作为轴承弹性支承结构，通过第一支承条和第三支承条的交错排布以使第二弹性箔片形变，即可实现弹性支承，无需加工出圆弧状波纹凸起，便于加工，能满足高精度要求，改变第一弹性箔片、第二弹性箔片、第三弹性箔片厚度、第一弹性箔片和第三弹性箔片承条之间的间隙宽度，即可改变轴承弹性支承能力，可实现工程化大批量生产需要，另外，相比于长时间使用可能会变形失效的圆弧状波纹凸起，该径向气体箔片轴承使用寿命较长。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本发明所提供式径向气体箔片轴承的具体实施例一的爆炸图；
图2为本发明所提供式径向气体箔片轴承的具体实施例一的轴向剖视图；
图3为本发明所提供式径向气体箔片轴承的具体实施例一的剖视局部 放大图；
图4为本发明所提供式径向气体箔片轴承的具体实施例一中箔片组件与轴承套筒连接位置的结构示意图；
图5为本发明所提供式径向气体箔片轴承的具体实施例一中弹性支承单元的示意图；
图6为本发明所提供式径向气体箔片轴承的具体实施例一中第二弹性箔片受压形变前的受力图；
图7为本发明所提供式径向气体箔片轴承的具体实施例一中第二弹性箔片受压形变后的受力图；
图8为本发明所提供式径向气体箔片轴承的具体实施例一中轴承套筒的结构示意图；
图9为本发明所提供式径向气体箔片轴承的具体实施例一中顶箔的结构示意图；
图10为本发明所提供式径向气体箔片轴承的具体实施例一中第一弹性箔片的结构示意图；
图11为本发明所提供式径向气体箔片轴承的具体实施例一中第二弹性箔片的结构示意图；
图12为本发明所提供式径向气体箔片轴承的具体实施例一中第三弹性箔片的结构示意图；
图13为本发明所提供式径向气体箔片轴承的具体实施例二中弹性支承单元的示意图；
图14为本发明所提供式径向气体箔片轴承的具体实施例三中弹性支承单元的示意图。
附图标记说明：
轴承套筒1，插槽11，箔片组件2，第一弹性箔片21，第一支承条211，第一凹槽212，第二弹性箔片22，第三弹性箔片23，第三支承条231，第三凹槽232，顶箔24，第四弹性箔片25，第五弹性箔片26，第五支承条261。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的核心是提供一种径向气体箔片轴承，有利于降低气体箔片轴承的加工难度、延长使用寿命。
需要说明的是，当元件被称为“固定”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”、“第四”、“第五”仅用于描述目的，而不能理解为指示或暗示相对重要性。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。
本发明所提供径向气体箔片轴承的一种具体实施例中，包括轴承套筒1和设置在轴承套筒1内侧的箔片组件2。轴承套筒1为圆柱形，其内壁为精加工表面，以满足气体箔片轴承的设计要求。其中，箔片组件2在周向上的一端固定在轴承套筒1上，另一端为自由端，箔片组件2整体呈圆弧状卷曲。可选地，如图2所示，轴承套筒1中仅设置一个箔片组件2。
箔片组件2包括弹性支承单元和设置在弹性支承单元内侧的顶箔24。顶箔24为完整的单片结构，形成轴承的柔性内表面。弹性支承单元主要起弹性变形和支承作用，如图3和图4所示，弹性支承单元中，包括由内至外依次设置的第一弹性箔片21、第二弹性箔片22和第三弹性箔片23，具体可以仅包括以上三层弹性箔片，第三弹性箔片23紧贴轴承套筒1的内周 面。
如图11所示，第二弹性箔片22为完整的不具有镂空结构的片体结构。如图5和图10所示，第一弹性箔片21沿周向依次间隔设置若干个与顶箔24相贴合的第一支承条211，第一弹性箔片21上位于两个第一支承条211之间的部分与顶箔24在径向上相分隔开。如图5和图12所示，第三弹性箔片23沿周向依次间隔设置若干个与第二弹性箔片22相贴合的第三支承条231，第三弹性箔片23上位于两个第三支承条231之间的部分与第二弹性箔片22在径向上相分隔开。
如图5所示，第一支承条211与第三支承条231在周向上相错开，使得第一支承条211在受压后能够将第二弹性箔片22的部分结构压至周向上相邻的两个第三支承条231之间的间隙中。具体地，以轴承套筒1的中心线为中心沿周向划分轴承套筒1中的空间，具体如图2和图3中相邻虚线之间被划分出的空间，每个被划分出的空间中只有第一支承条211、第三支承条231中的一者。第一支承条211和第三支承条231用于为轴承提供结构刚度和结构阻尼。
第一弹性箔片21主要作用为将顶箔24的力传递到第二弹性箔片22上，使第二弹性箔片22产生周向弹性变形。第二弹性箔片22为完整结构，主要起周向弹性变形作用。第三弹性箔片23与轴承套筒1的内表面贴合，主要起支承和给第二弹性箔片22留出变形空间的作用。
如图6和图7所示，当轴承工作时，轴承气膜压力P施加在顶箔24上，并通过顶箔24传递到弹性支承单元上，第一弹性箔片21上的第一支承条211对第二弹性箔片22施加压力F1，第三弹性箔片23上的第三支承条231对第二弹性箔片22施加支撑力F2，由于第三支承条231与第一支承条211在周向上相错开，使得第一支承条211能够将第二弹性箔片22压到两个相邻第三支承条231之间的间隙中，第二弹性箔片22发生弹性变形。
本实施例提供的径向气体箔片轴承，利用叠片式的弹性支承单元作为轴承弹性支承结构，通过第一支承条211和第三支承条231的交错排布以使第二弹性箔片22形变，即可实现弹性支承，无需加工出圆弧状波纹凸起，便于加工，能满足高精度要求，改变第一弹性箔片21、第二弹性箔片22、 第三弹性箔片23厚度、第一弹性箔片21和第三弹性箔片23承条之间的间隙宽度，即可改变轴承弹性支承能力，实现工程化大批量生产需要，另外，相比于长时间使用可能会变形失效的圆弧状波纹凸起，本实施例中的径向气体箔片轴承使用寿命较长。
进一步地，请参考图10和图12，第一弹性箔片21上位于相邻两个第一支承条211之间的部分沿径向贯穿设置通孔。具体地，在第一弹性箔片21上位于相邻第一支承条211之间的部分，在轴向上的两端互相连接，轴向上中部构成通孔，以实现与顶箔24的分隔。第三弹性箔片23上位于相邻两个第三支承条231之间的部分沿径向贯穿设置通孔。具体地，在第三弹性箔片23上位于相邻第三支承条231之间的部分，在轴向上的两端互相连接，轴向上中部构成通孔，以实现与第二弹性箔片22的分隔。另外，通过设置支承条的周向长度、相邻支承条的周向间距、以及不同弹性箔片上支承条的位置关系，可以实现对轴承性能参数的改变。
由于第一弹性箔片21上相邻第一支承条211之间、第三弹性箔片23上相邻第三支承条231之间均直接加工出通孔以实现与相邻部件的径向分隔，在加工时，第一弹性箔片21、第二弹性箔片22、第三弹性箔片23以及顶箔24均可以直接采用模具一次冲压即可成型，可进一步便于加工。
进一步地，如图4所示，箔片组件2在周向上的一端插接固定于轴承套筒1的插槽11中。加工时，在轴承套筒1内周面上加工出插槽11，箔片组件2中，顶箔24和各弹性箔片在周向上的同一端均插入该插槽11中即完成安装。采用定位销式定位安装的方式将箔片组件2安装轴承套筒1上，箔片组件2安装、拆卸和更换方便，可保证装配精度，且能够提高轴承装配成品率。当然，在其他实施例中，箔片组件2也可以采用螺栓压紧式安装、点焊固定式安装等方式安装于轴承套筒1上。
进一步地，请参考图5，第一支承条211在第一弹性箔片21上等间距排布，第三支承条231在第三弹性箔片23上等间距排布，且第一支承条211与第三支承条231的周向长度相同，使得转子转动过程中，箔片组件2能够始终为转子提供较为均匀的弹力。
进一步地，请参考图5中的虚线，第一支承条211在周向上的中心线 与两个第三支承条231之间的间隙在周向上的中心线对齐，可进一步提供转子受力的均匀性。
本实施例提供的径向气体箔片轴承，采用具有交错开槽的多层箔片相互叠加的方式组成结构紧凑的弹性支承单元，能够显著的提高轴承加工精度，简化加工流程，降低生产成本，提高轴承的性能，具有多重刚度、载荷力较高、缓和冲击振动的能力较强、轴承成品率高等特点，可广泛应用于轴承领域，可适用于高速轻载转子支撑工作。
当然，在其他实施例中，箔片组件2不限于只设置一个，可选地，至少两个箔片组件2沿周向依次设于轴承套筒1中。
显然，在其他实施例中，第一弹性箔片21上相邻第一支承条211之间、第三弹性箔片23上相邻第三支承条231之间也可以不设置通孔，例如图13所示，第一弹性箔片21上相邻第一支承条211之间设有第一凹槽212，第一凹槽212的槽底在径向上与顶箔24之间具有间隙，第三弹性箔片23上相邻第三支承条231之间设有第三凹槽232，第三凹槽232的槽底在径向上与第二弹性箔片22之间具有间隙，通过不径向贯穿的凹槽实现第一弹性箔片21、第三弹性箔片23与相邻部件的径向分隔。
此外，弹性支承单元中，弹性箔片不限于设置三层，例如图14，在第三弹性箔片23外侧还可以依次设置第四弹性箔片25和第五弹性箔片26，第四弹性箔片25与第二弹性箔片22结构相同，第五弹性箔片26与第三弹性箔片23结构相同且第五弹性箔片26上的第五支承条261与各第三支承条231在周向上相错开，也能够提供弹性支承作用。本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
以上对本发明所提供的径向气体箔片轴承进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (8)

  1. 一种径向气体箔片轴承，包括：轴承套筒(1)、设于所述轴承套筒(1)内侧的箔片组件(2)；所述箔片组件(2)在周向上的一端固定于所述轴承套筒(1)且另一端为自由端，所述箔片组件(2)包括弹性支承单元和设于所述弹性支承单元内侧的顶箔(24)，其特征在于，所述弹性支承单元中，包括由内至外依次设置的第一弹性箔片(21)、第二弹性箔片(22)和第三弹性箔片(23)；所述第一弹性箔片(21)沿周向依次间隔置若干个与所述顶箔(24)相贴合的第一支承条(211)，所述第三弹性箔片(23)沿周向依次间隔设置若干个与所述第二弹性箔片(22)相贴合的第三支承条(231)；所述第一支承条(211)与所述第三支承条(231)在周向上相错开设置，以使所述第一支承条(211)在受压后能够将所述第二弹性箔片(22)的部分结构压至周向上相邻的两个所述第三支承条(231)之间的间隙中。
  2. 根据权利要求1所述的径向气体箔片轴承，其特征在于，所述第一弹性箔片(21)上位于相邻两个所述第一支承条(211)之间的部分沿径向贯穿设置通孔。
  3. 根据权利要求1所述的径向气体箔片轴承，其特征在于，所述第三弹性箔片(23)上位于相邻两个所述第三支承条(231)之间的部分沿径向贯穿设置通孔。
  4. 根据权利要求1所述的径向气体箔片轴承，其特征在于，所述第二弹性箔片(22)为不具有镂空结构的完整片体。
  5. 根据权利要求1所述的径向气体箔片轴承，其特征在于，至少两个所述箔片组件(2)沿周向依次设于所述轴承套筒(1)中。
  6. 根据权利要求1至5任一项所述的径向气体箔片轴承，其特征在于，所述箔片组件(2)在周向上的一端插接固定于所述轴承套筒(1)的插槽(11)中。
  7. 根据权利要求1至5任一项所述的径向气体箔片轴承，其特征在于，所述第一支承条(211)在所述第一弹性箔片(21)上等间距排布，所述第三支承条(231)在所述第三弹性箔片(23)上等间距排布，且所述第一支 承条(211)与所述第三支承条(231)的周向长度相同。
  8. 根据权利要求1至5任一项所述的径向气体箔片轴承，其特征在于，所述第一支承条(211)在周向上的中心线与两个所述第三支承条(231)之间的间隙在周向上的中心线对齐。
PCT/CN2020/123075 2020-09-30 2020-10-23 径向气体箔片轴承 WO2022067911A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011058371.7 2020-09-30
CN202011058371.7A CN112081817A (zh) 2020-09-30 2020-09-30 径向气体箔片轴承

Publications (1)

Publication Number Publication Date
WO2022067911A1 true WO2022067911A1 (zh) 2022-04-07

Family

ID=73730031

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/123075 WO2022067911A1 (zh) 2020-09-30 2020-10-23 径向气体箔片轴承

Country Status (2)

Country Link
CN (1) CN112081817A (zh)
WO (1) WO2022067911A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116658516B (zh) * 2023-06-01 2024-02-23 南华大学 一种叶脉型双旋向箔片气体动压轴承

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315660A (en) * 1979-03-14 1982-02-16 Tmaschinen Forschungsvereinigung Verbrennungskra Maschinen Aerodynamic multiple-wedge resilient bearing
JPS6262018A (ja) * 1985-09-06 1987-03-18 Ishikawajima Harima Heavy Ind Co Ltd 流体軸受構造
CN102927124A (zh) * 2012-10-10 2013-02-13 西安交通大学 一种多层鼓泡箔片径向动压气体轴承
CN109854612A (zh) * 2019-02-01 2019-06-07 西安交通大学 一种弹性支撑组件及动压气体径向轴承
CN211398264U (zh) * 2020-01-09 2020-09-01 珠海格力电器股份有限公司 动压气体径向轴承、压缩机及空调
CN111664169A (zh) * 2020-06-22 2020-09-15 珠海格力电器股份有限公司 一种弹性支撑组件及采用其的径向轴承

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130062757A (ko) * 2011-12-05 2013-06-13 국방과학연구소 주름이 없는 범프 포일을 포함하는 저널 포일 베어링 및 이를 포함하는 모터
US8920032B2 (en) * 2013-03-15 2014-12-30 Hamilton Sundstrand Corporation Bearing sleeve
EP3096027B1 (en) * 2013-12-12 2018-11-14 NTN Corporation Foil bearing and method for manufacturing thereof
WO2016114418A1 (ko) * 2015-01-13 2016-07-21 주식회사 부강테크 압전 소자를 이용한 감지 장치가 구비된 에어 포일 베어링
CN108730330B (zh) * 2018-08-09 2023-08-08 北京瑞深航空科技有限公司 弹性箔片空气轴承以及其刚度和阻尼的调整方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315660A (en) * 1979-03-14 1982-02-16 Tmaschinen Forschungsvereinigung Verbrennungskra Maschinen Aerodynamic multiple-wedge resilient bearing
JPS6262018A (ja) * 1985-09-06 1987-03-18 Ishikawajima Harima Heavy Ind Co Ltd 流体軸受構造
CN102927124A (zh) * 2012-10-10 2013-02-13 西安交通大学 一种多层鼓泡箔片径向动压气体轴承
CN109854612A (zh) * 2019-02-01 2019-06-07 西安交通大学 一种弹性支撑组件及动压气体径向轴承
CN211398264U (zh) * 2020-01-09 2020-09-01 珠海格力电器股份有限公司 动压气体径向轴承、压缩机及空调
CN111664169A (zh) * 2020-06-22 2020-09-15 珠海格力电器股份有限公司 一种弹性支撑组件及采用其的径向轴承

Also Published As

Publication number Publication date
CN112081817A (zh) 2020-12-15

Similar Documents

Publication Publication Date Title
JP5915701B2 (ja) ラジアルフォイル軸受
US20070047858A1 (en) Foil journal bearing with bilinear stiffness spring
CN108730330B (zh) 弹性箔片空气轴承以及其刚度和阻尼的调整方法
CN106594059B (zh) 三瓣式气体箔片径向轴承
CN108730331B (zh) 轴向动压空气轴承以及其刚度和阻尼的调整方法
WO2022067911A1 (zh) 径向气体箔片轴承
CN112762091A (zh) 网状径向气体箔片轴承
CN111503134B (zh) 一种空气压缩机、电机及气体动压径向轴承
CN103703261A (zh) 径向箔轴承
CN110594286B (zh) 箔片气体动压轴承和高速电机
CN212297250U (zh) 气体轴承
CN112648379A (zh) 一种弹性波箔型柱面气膜柔性支撑结构
JPS6215540Y2 (zh)
CN114198391B (zh) 一种气浮径向轴承
CN115628264A (zh) 一种箔片式动压空气轴承及旋转机械轴系
JP2006177542A (ja) スプリングフォイル軸受
KR102265256B1 (ko) 구조 개선된 이중 범프포일이 구비된 에어포일 레이디얼 베어링
CN214007792U (zh) 气体轴承组件及压缩机
CN212672222U (zh) 一种箔片轴承
CN113685433A (zh) 气体止推轴承、转轴和压缩机
CN116498646A (zh) 一种具有翅片型支承箔片的气体动压轴承
CN213511662U (zh) 一种径向气体箔片轴承
CN214578299U (zh) 螺旋弹簧基底的径向空气轴承
CN214247994U (zh) 网状径向气体箔片轴承
CN113833746A (zh) 一种径向气体悬浮轴承

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20955931

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20955931

Country of ref document: EP

Kind code of ref document: A1