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CN-122014357-A - Extrusion oil film damper and rotating shaft mounting assembly and aero-engine rotor

CN122014357ACN 122014357 ACN122014357 ACN 122014357ACN-122014357-A

Abstract

The invention relates to the technical field of aeroengines, and discloses an extrusion oil film damper, a rotating shaft mounting assembly and an aeroengine rotor. The extrusion oil film damper is used for a multi-pivot rotor with a centering function, and the extrusion oil film damper and rotating shaft mounting assembly comprises a rotating shaft, a bearing mounting assembly, a sealing ring, an oil film gap and an oil film passage, wherein the oil film gap is formed by surrounding the bearing outer ring, the bearing mounting assembly and the sealing ring, the oil film passage communicated with the outside and the oil film gap is formed by the bearing mounting assembly, and external oil can enter the oil film gap through the oil film passage to form an extrusion oil film. The extrusion oil film damper and the rotating shaft mounting assembly abandon centering elastic support, simplify the structure, reduce the weight and facilitate the disassembly and assembly, integrate the oil film gap into a surrounding structure of the bearing mounting assembly, the bearing outer ring and the sealing ring of the bearing, cancel redundant parts, further simplify the whole structure and reduce the space occupied by the mounting.

Inventors

  • Nie Weijian
  • LIU FEICHUN
  • HU JIANHUI
  • TANG GUANG
  • LI JIAN
  • WANG SHUAI
  • ZHOU QIER
  • YUAN WEI
  • Tong ya

Assignees

  • 中国航发湖南动力机械研究所

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. The utility model provides an extrusion oil film attenuator and pivot installation component, its characterized in that, extrusion oil film attenuator is used for possessing the many fulcra rotors of centering function, extrusion oil film attenuator and pivot installation component includes: A rotating shaft (1); The bearing (2) comprises a bearing inner ring (201) and a bearing outer ring (202), wherein the bearing inner ring (201) is fixedly arranged on the periphery of the rotating shaft (1); The bearing mounting assembly (3) is arranged on the periphery of the bearing (2), and the bearing outer ring (202) is fixedly arranged on the inner periphery of the bearing mounting assembly (3); the sealing ring (4) is arranged between the bearing mounting assembly (3) and the bearing outer ring (202) in a abutting manner; The bearing outer ring (202), the bearing mounting assembly (3) and the sealing ring (4) are surrounded to form an oil film gap (5), the bearing mounting assembly (3) is provided with an oil film passage (6) communicated with the outside and the oil film gap (5), and external oil can enter the oil film gap (5) through the oil film passage (6) to form an extrusion oil film.
  2. 2. The squeeze film damper and spindle mounting assembly of claim 1, wherein at least two seal rings (4) are provided, the two seal rings (4) being separated on both sides of the oil passage (6) to form an oil film gap (5) of annular configuration between the bearing outer ring (202) and the bearing mounting assembly (3).
  3. 3. The squeeze film damper and spindle mounting assembly of claim 2, wherein an annular groove (2021) is provided in the outer periphery of the bearing outer ring (202), and at least a portion of the seal ring (4) is disposed in the annular groove (2021).
  4. 4. The squeeze film damper and spindle mounting assembly of claim 1, wherein a first recess (3021) is provided in the inner periphery of the bearing mounting assembly (3), the first recess (3021) being located at the distal outlet of the oil passage (6); And/or the outer side of the bearing outer ring (202) is provided with a second concave position (2022), and the second concave position (2022) is arranged corresponding to the tail end outlet position of the lubricating oil passage (6).
  5. 5. The squeeze film damper and spindle mounting assembly of any one of claims 1,2, 4, wherein the bearing mounting assembly (3) comprises: A bearing block (301); A bearing housing (302) mounted on the bearing housing (301) and located at the outer periphery of the bearing outer ring (202); The oil passage (6) has a first section (601) extending through the bearing housing (301) and a second section (602) extending through the bearing sleeve (302), the end of the oil passage (6) being located at the second section (602).
  6. 6. The squeeze film damper and spindle mounting assembly of claim 1, wherein the spindle (1) is a hollow structure, the squeeze film damper and spindle mounting assembly further comprising: The balancing device (7) is fixedly arranged in the inner cavity of the rotating shaft (1), and the peripheral outline of the balancing device (7) and the inner cavity outline of the rotating shaft (1) are in profiling arrangement.
  7. 7. The squeeze film damper and spindle mounting assembly of claim 6, wherein the balancing device (7) comprises: A fixing part (701) positioned at one end of the balancing device (7), wherein the fixing part (701) is used for fixedly arranging the balancing device (7) in the inner cavity of the rotating shaft (1); the balance weights (702) are integrally formed on the fixing part (701) and extend along the axial direction of the rotating shaft (1), and the balance weights (702) are arranged at intervals along the inner circumference of the rotating shaft (1).
  8. 8. The extrusion oil film damper and rotating shaft mounting assembly according to claim 7, wherein the rotating shaft (1) is provided with a first connecting hole (101), the fixing part (701) is provided with a second connecting hole (7011) arranged corresponding to the first connecting hole (101), and the first connecting hole (101) and the second connecting hole (7011) are connected through a connecting piece (8) so as to fix the balancing device (7) in an inner cavity of the rotating shaft (1) by using the fixing part (701); And/or the fixing part (701) is provided with a pulling and detaching claw (7012), and the pulling and detaching claw (7012) can be driven to drive the balancing device (7) to be installed in the inner cavity of the rotating shaft (1) or detached from the inner cavity of the rotating shaft (1).
  9. 9. The extrusion oil film damper and rotating shaft mounting assembly according to claim 8, wherein a positioning boss (102) is arranged on the outer side of the rotating shaft (1), and the positioning boss (102) is located at the opening of the first connecting hole (101).
  10. 10. An aircraft engine rotor comprising the squeeze film damper and shaft mounting assembly of any one of claims 1-9.

Description

Extrusion oil film damper and rotating shaft mounting assembly and aero-engine rotor Technical Field The invention relates to the technical field of aeroengines, in particular to an extrusion oil film damper and rotating shaft mounting assembly and an aeroengine rotor. Background In order to reduce vibration of a rotor system in the running process, an extrusion oil film damper is usually designed at a rotor support, and oil is extruded when the rotor rotates to form an extrusion oil film, so that vibration energy is absorbed, and the purpose of vibration reduction is achieved. The squeeze film damper is divided into a centering type and a non-centering type according to whether the elastic centering support is provided, and when the elastic centering support structure is assembled on a multi-pivot rotor, the elastic centering support structure increases weight, and the elastic centering support structure may cause over-centering for the multi-pivot rotor and has a complex structure and inconvenient disassembly. Disclosure of Invention In view of this, the present invention provides an assembly for mounting an extrusion oil film damper and a rotating shaft, so as to solve the problems that the centering elastic supporting structure of the existing extrusion oil film damper increases weight, may cause over centering for a multi-pivot rotor, and is complex in structure and inconvenient to assemble and disassemble. Meanwhile, the invention provides an aero-engine rotor. In a first aspect, the present invention provides an extrusion oil film damper and shaft mounting assembly for a multi-fulcrum rotor having a centering function, the extrusion oil film damper and shaft mounting assembly comprising: A rotating shaft; The bearing comprises a bearing inner ring and a bearing outer ring, and the bearing inner ring is fixedly arranged on the periphery of the rotating shaft; The bearing mounting assembly is arranged on the periphery of the bearing, and the bearing outer ring is fixedly arranged on the inner periphery of the bearing mounting assembly; The sealing ring is arranged between the bearing mounting assembly and the bearing outer ring in a butt joint manner; the bearing outer ring, the bearing mounting assembly and the sealing ring are surrounded to form an oil film gap, the bearing mounting assembly is provided with an oil passage communicated with the outside and the oil film gap, and external oil can enter the oil film gap through the oil passage to form an extrusion oil film. The invention has the beneficial effects that the novel extrusion oil film damper is formed by the bearing, the bearing mounting assembly, the sealing ring, the oil film gap and the lubricating oil passage, is used for a multi-pivot rotor with a centering function of a multi-pivot support system structure, eliminates centering elastic support, simplifies the structure, reduces the weight and is convenient to assemble and disassemble, ensures the tightness of the oil film gap through the flexible end sealing design of the sealing ring, ensures that lubricating oil can quickly form a stable extrusion oil film, utilizes the hydraulic pressure of the oil film to form passive radial constraint on the rotating shaft to replace part of the centering elastic support, integrates the oil film gap into a surrounding structure of the bearing mounting assembly, the bearing outer ring of the bearing and the sealing ring, eliminates redundant parts, further simplifies the whole structure and reduces the space occupied by installation. In an alternative embodiment, at least two sealing rings are provided, the two sealing rings being arranged separately on both sides of the oil passage to form an oil film gap of annular configuration between the bearing outer ring and the bearing mounting assembly. The oil film pressure maintaining device has the beneficial effects that the two sealing rings which are respectively arranged on the two sides of the oil sliding passage replace the end sealing structure of the traditional centering damper, are arranged on the two sides of the oil film gap to form flexible end seals, so that the oil sliding is effectively prevented from leaking, the continuous stability of the oil film pressure can be ensured, and the oil film pressure maintaining device has better oil film pressure maintaining effect compared with the traditional hard end sealing. In an alternative embodiment, the outer circumference of the bearing outer ring is provided with an annular groove, and at least part of the sealing ring is arranged in the annular groove. The annular groove provides an installation position for the sealing ring so as to facilitate stable installation of the sealing ring. In an alternative embodiment, a first concave position is arranged on the inner periphery of the bearing mounting assembly, and the first concave position is positioned at the tail end outlet of the lubricating oil passage; and/or the outer side of the bearing