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CN-122007836-A - Double-spiral gear set spline clearance eliminating tool and assembling method

CN122007836ACN 122007836 ACN122007836 ACN 122007836ACN-122007836-A

Abstract

The invention discloses a double-spiral gear set spline clearance elimination tool and an assembly method, wherein the double-spiral gear set adopts a parallel shaft two-stage two-way split double-spiral gear transmission mode, the double-spiral gear set comprises a primary driving gear, a primary driven gear and a torsion measurement film disc arranged on the primary driven gear, the torsion measurement film disc is matched with the primary driven gear through a spline, the spline clearance elimination tool comprises a mounting structure, a positioning structure, an anti-rotation structure and a load applying mechanism, the mounting structure is used for being connected with the primary driving gear and the torsion measurement film disc as structural supports, the positioning structure is axially limited and radially limited and connected with the mounting structure, the positioning structure is used for being connected with the torsion measurement film disc, the anti-rotation structure is arranged on the mounting structure and used for limiting circumferential rotation of the primary driving gear and/or the primary driven gear, and the load applying mechanism is arranged on the mounting structure and used for applying preset tangential load to the positioning structure to act on the torsion measurement film disc through the positioning structure so as to eliminate spline fit clearance between the primary driven gear and the torsion measurement film disc.

Inventors

  • CHENG BIYU
  • YAN CHENG
  • FANG HUI
  • ZHOU DAN
  • ZHU BIN
  • TANG HONGDI

Assignees

  • 中国航发南方工业有限公司

Dates

Publication Date
20260512
Application Date
20260202

Claims (10)

  1. 1. Double helix gear train spline (131) clearance elimination frock, double helix gear train adopts parallel shaft two-stage double-circuit reposition of redundant personnel double helix gear transmission form, double helix gear train include one-level driving gear (110), respectively in one-level driven gear (120) that the both sides of one-level driving gear (110) set up and set up in survey on one-level driven gear (120) turn round membrane dish (130), survey turn round membrane dish (130) with one-level driven gear (120) pass through spline (131) cooperation, its characterized in that, spline (131) clearance elimination frock includes: a mounting structure (2) for connection with the primary drive gear (110), the mounting structure (2) being for structural support; The positioning structure (3) is connected with the mounting structure (2) in an axial limiting manner and a radial limiting manner, and the positioning structure (3) is used for being connected with the torsion measuring membrane disc (130); an anti-rotation structure (4) arranged on the mounting structure (2) and used for limiting the circumferential rotation of the primary driving gear (110) and/or the primary driven gear (120); the load applying mechanism (5) is arranged on the mounting structure (2) and is used for applying a preset tangential load to the positioning structure (3) so as to act on the torsion measuring membrane disc (130) through the positioning structure (3) and further eliminate the matching clearance of the first-stage driven gear (120) and the spline (131) of the torsion measuring membrane disc (130).
  2. 2. The double-spiral gear set spline (131) clearance elimination tool according to claim 1, wherein the positioning structure (3) comprises a positioning sleeve (310) matched with the outer diameter size of the torque measurement membrane disc (130), the mounting structure (2) is provided with a mounting hole (201) matched with the radial size of the positioning sleeve (310), the positioning sleeve (310) is circumferentially protruded to form an annular convex ring (311) for being axially matched with the end face of the mounting structure (2), and the positioning sleeve (310) is provided with a connecting structure, and the position of the connecting structure is matched with the position of a through hole circumferentially distributed on the torque measurement membrane disc (130).
  3. 3. The tool for eliminating the clearance of the spline (131) of the double-spiral gear set according to claim 2, wherein the connecting structure comprises a connecting hole (312) arranged on the positioning sleeve (310), the connecting hole (312) is matched with the circumferential distribution position of the through hole of the torsion measuring membrane disc (130), and the connecting structure further comprises a bolt assembly (320) used for penetrating through the connecting hole (312) and the through hole.
  4. 4. The double helical gear set spline (131) clearance elimination tooling of claim 2, wherein said load applying mechanism (5) comprises a mounting bracket (510) provided to said mounting structure (2), said mounting bracket (510) having a threaded bore provided tangentially to said primary driven gear (120), said threaded bore being threadably connected with a load applying screw (520), said positioning sleeve (310) being provided with a load applying stop (313) for abutting engagement with an end of said load applying screw (520).
  5. 5. The double helical gearset spline (131) clearance elimination tooling of claim 4, wherein said predetermined tangential load is applied based on the equation T = kFd, where T is applied torque, k is tightening torque coefficient, F is thread preload, and d is the nominal diameter of the load applying screw (520).
  6. 6. The double helical gear set spline (131) clearance elimination tooling of claim 2, wherein said load applying mechanism (5) comprises a hydraulic loading mechanism disposed to said mounting structure (2) tangentially to said primary driven gear (120), said positioning sleeve (310) being provided with a load applying stop (313) for abutting engagement with an end of an output of said hydraulic loading mechanism.
  7. 7. The double-helical gear set spline (131) clearance elimination tooling of claim 1, further comprising a lifting structure (6) provided to the mounting structure (2) for integrally lifting the double-helical gear set mounted to the spline (131) clearance elimination tooling and applied with a tangential load into a casing.
  8. 8. The tool for eliminating the clearance between the spline (131) of the double-spiral gear set according to claim 7, wherein the hoisting structure (6) comprises boom arms (610) symmetrically distributed and arranged on the mounting structure (2), cross rods (620) respectively penetrating through the two boom arms (610), a limiting mechanism for fixing the cross rods (620), a sliding block (640) slidingly connected to the cross rods (620) and a hanging ring (650) fixedly arranged on the sliding block (640).
  9. 9. The double helical gear set spline (131) clearance elimination tooling of any one of claims 1-8, wherein said anti-rotation structure (4) comprises an anti-rotation seat (410) provided to said mounting structure (2) and a spindle (420) provided to said anti-rotation seat (410), said spindle (420) being connected to a gear shaft of said primary drive gear (110).
  10. 10. A double helical gear assembly method, characterized in that it is applied to the double helical gear set spline clearance elimination tooling of any one of claims 1 to 9, said assembly method comprising: S1, arranging a mounting structure on a double-spiral gear set, connecting a positioning structure with a torsion measuring film disc, and arranging an anti-rotation structure to limit the circumferential rotation of the primary driving gear and/or the primary driven gear; S2, applying a preset tangential load to the positioning structure through a load applying mechanism; s3, integrally hoisting the double-spiral gear set into the casing based on the double-spiral gear set spline clearance elimination tool.

Description

Double-spiral gear set spline clearance eliminating tool and assembling method Technical Field The invention relates to the technical field of aero-engine gear assembly, in particular to a double-spiral gear set spline clearance elimination tool. In addition, the invention also relates to a double-spiral gear set spline clearance elimination method comprising the double-spiral gear set spline clearance elimination tool. Background The vortex propeller engine speed reducer is in a transmission mode of a two-stage double-path split double-helical gear, the double-helical gear has the core advantages of strong bearing capacity, stable transmission and small impact vibration, and is widely applied to heavy-load and high-speed transmission scenes, and the assembly precision of the vortex propeller engine speed reducer directly determines the stability and the service life of a transmission system. The double-spiral gear set comprises a primary driving gear, primary driven gears arranged on two sides of the primary driving gear and a torsion measuring film disc arranged on the primary driven gears, wherein the torsion measuring film disc is matched with the primary driven gears through splines, a gap for matching the splines exists after the primary driven gears and the torsion measuring film disc are assembled in place, if the two spline matching side gaps are inconsistent, a side gear with smaller side gaps is driven to move when a spline sleeve axially floats, the gear movement of the other side is relatively delayed, the meshing tooth gaps of the primary driven gears on two sides are always different, the load cannot be balanced automatically, the stress of one side gear is larger, the wear of the gears and bearings with larger stress is aggravated due to load unbalance, fatigue failure occurs in advance, the service life of the whole transmission system is shortened, and in addition, extra vibration and noise are also caused by the floating asynchronization caused by the side gap difference, and the running stability of the system is affected. Disclosure of Invention The invention provides a tool and an assembly method for eliminating spline gaps of a double-spiral gear set, and aims to solve the technical problem that floating is asynchronous, load is unbalanced and fatigue is aggravated due to the fact that the double-spiral gear torque measuring film disc is in spline fit with gaps. According to one aspect of the present invention, there is provided a fixture for eliminating spline clearance of a double-helical gear set, wherein the double-helical gear set adopts a parallel shaft two-stage two-way split double-helical gear transmission form, the double-helical gear set includes a primary driving gear, primary driven gears respectively disposed on two sides of the primary driving gear, and a torsion measuring film disc disposed on the primary driven gear, the torsion measuring film disc is in spline fit with the primary driven gear, and the spline clearance eliminating fixture includes: the mounting structure is used for being connected with the primary driving gear and used as a structural support; The positioning structure is connected with the mounting structure in an axial limiting manner and a radial limiting manner, and is used for being connected with the torsion measuring film disc; the anti-rotation structure is arranged on the mounting structure and used for limiting the circumferential rotation of the primary driving gear and/or the primary driven gear; The load applying mechanism is arranged on the mounting structure and is used for applying a preset tangential load to the positioning structure so as to act on the torsion measuring membrane disc through the positioning structure and further eliminate spline fit gaps of the primary driven gear and the torsion measuring membrane disc. As a further improvement of the technical scheme, the positioning structure comprises a positioning sleeve matched with the outer diameter of the torsion measuring film disc, the mounting structure is provided with a mounting hole matched with the radial dimension of the positioning sleeve, the positioning sleeve is circumferentially protruded to form an annular convex ring axially matched with the end face of the mounting structure, the positioning sleeve is provided with a connecting structure, and the position of the connecting structure is matched with the position of the through holes circumferentially distributed on the torsion measuring film disc. As a further improvement of the technical scheme, the connecting structure comprises connecting holes arranged on the positioning sleeve, the connecting holes are matched with the circumferential distribution positions of the through holes of the torsion measuring film disc, and the connecting structure further comprises bolt assemblies used for penetrating through the connecting holes and the through holes. As a further improvement of the above technical solution,