阅读说明：本技术 一种航空传动系统高速细长轴辅助支撑装置 (A kind of aviation transmission system high speed elongated shaft auxiliary support apparatus ) 是由 刘显双 杨光荣 田茂全 韩念龙 马绍兴 于 2019-08-13 设计创作，主要内容包括：本发明公开了一种航空传动系统高速细长轴辅助支撑装置,包括壳体、上轴承衬套、下轴承衬套、内花键套筒、上轴承、下轴承、上密封圈、下密封圈、调整垫圈,壳体上下端面分别设置有胶圈槽,上密封圈、下密封圈分别设置在胶圈槽内,上轴承衬套、下轴承衬套分别设置在壳体的上下端面,上轴承、下轴承分别设置在上轴承衬套、下轴承衬套内部,内花键套筒设置在上轴承、下轴承内,调整垫圈设置在上轴承衬套与上轴承之间,本发明是在发动机空间受限、高速传动、重量严苛的情况下产生,结构简单、独立可拆,安装方便；且便于后续设计系列发展、实用性强。(The invention discloses a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus, including shell, upper bearing (metal) bushing, lower bearing bushing, inner spline sleeve, upper bearing (metal), lower bearing, upper seal, lower seal, adjusting washer, shell upper and lower end face is respectively arranged with aprons slot, upper seal, lower seal is separately positioned in aprons slot, upper bearing (metal) bushing, lower bearing bushing is separately positioned on the upper and lower end face of shell, upper bearing (metal), lower bearing is separately positioned on upper bearing (metal) bushing, lower bearing bush inside, inner spline sleeve is arranged in upper bearing (metal), in lower bearing, adjusting washer is arranged between upper bearing (metal) bushing and upper bearing (metal), the present invention is in engine limited space, high-speed drive, it is generated in the case that weight is harsh, structure is simple, it is independent removable, it is easy for installation；And convenient for subsequent design series development, practical.)

1. a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus, it is characterised in that: served as a contrast including shell (1), upper bearing (metal) Cover (2), lower bearing bushing (3), inner spline sleeve (4), upper bearing (metal) (5), lower bearing (6), upper seal (7), lower seal (8), adjusting washer (9), the shell (1) upper and lower end face are respectively arranged with aprons slot, upper seal (7), lower seal (8) It is separately positioned in aprons slot, the upper bearing (metal) bushing (2), lower bearing bushing (3) are separately positioned on the upper and lower side of shell (1) Face, the upper bearing (metal) (5), lower bearing (6) are separately positioned on upper bearing (metal) bushing (2), lower bearing bushing (3) inside, described In upper bearing (metal) (5), lower bearing (6), the adjusting washer (9) is arranged in upper bearing (metal) bushing (2) for inner spline sleeve (4) setting Between upper bearing (metal) (5).

2. a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus according to claim 1, it is characterised in that: institute Upper bearing (metal) bushing (2), the lower bearing bushing (3) stated are separately fixed at the upper and lower end face of shell (1) by stud (10), described Locking plate (11) and nut (12) are additionally provided on stud (10).

3. a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus according to claim 1, it is characterised in that: institute The shaft shoulder is provided in the inner spline sleeve (4) stated, the shaft shoulder is located between upper bearing (metal) (5), lower bearing (6).

4. a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus according to claim 1, it is characterised in that: institute Through-hole is provided on the shell (1) stated, the upper bearing (metal) bushing (2), lower bearing bushing (3) lower part are inserted respectively into shell (1) in through-hole, and there is a gap in upper bearing (metal) bushing (2), lower bearing bushing (3) lower part outside wall surface and through-hole wall face, realize Clearance fit between upper bearing (metal) bushing (2), lower bearing bushing (3) and shell (3).

5. a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus according to claim 1, it is characterised in that: institute The inner spline sleeve (4) stated and upper bearing (metal) (5), lower bearing (6) are transition fit.

6. a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus according to claim 1, it is characterised in that: institute Several installation through-holes (14) are additionally provided on the shell (1) stated.

7. a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus according to claim 1, it is characterised in that: institute Shell (1) material stated is aluminium.

8. a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus according to claim 1, it is characterised in that: institute Shell (1) one end stated is provided with lightening hole (13).

Technical field

The invention belongs to aero-engine art drive systems field more particularly to a kind of aviation transmission system high speed are elongated Axis auxiliary support apparatus.

Background technique

Vertical drive shaft between aero-engine-accessory drive is important the zero of aero-engine transmission system Part, function are the power transmissions ensured between aero-engine-accessory drive, and vertical drive shaft both ends are equipped with and gradually open Line spline only transmits torque or bears the moment of flexure of very little, is generally designed to elongated shaft form, this vertical drive shaft is related to The complete machine job stability of engine, and can not back up.In ground handling, this transmission shaft is once broken or destroys engine, Engine can not then transmit power to accessory drive, the attachmentes such as fuel pump and scavenge oil pump on accessory drive then without Method work, lubricating system and the fuel system paralysis of engine, engine stop occurring and can not restart.Engine exists When working on aircraft, once being broken or destroying, engine can not then transmit power to accessory drive, start this transmission shaft Machine then causes to stop and can not start；Accessory drive also can not by power transmission to aircraft accessory casing, cause motor and The attachmentes such as hydraulic pump can not work, and the control system on aircraft then runs out of steam input.So either on ground still in height Sky, the job stability of vertical drive shaft are directly related to the service performance and flight safety of engine and aircraft.

In recent years, the big bypass ratio direction of engine towards consumption reduction synergy is developed, the increase of bypass ratio, so that engine wind It fans diameter to increase, transmission shaft is elongated to cause big draw ratio, amount of deflection increase, critical speed to reduce, and under the limitation of engine space, passes The moving axis diameter of axle can not increase.If upper based on the vertical drive shaft that fan increases front engine lengthen transmission shaft, in engine In the course of work, the inertia force that when transmission shaft self gravity and high speed rotation generates is turned round so that transmission shaft is transmitted in high speed rotation The problems such as a series of harmonic vibration can be generated when square, influences transmission shaft driven stability, and the generation vibrated can be to engine Bearing at drive bevel gear in central transmission bevel gear and accessory drive generates very big active force, and bearing again can be anti- Gear and transmission shaft are acted on, this can accelerate the abrasion of bearing, gear and splined driveshaft, influence the stabilization of transmission shaft work Property.Serious situation will lead to transmission shaft and contact with fancase hole, generate failure, stability and service life to engine are very not Benefit.Therefore, it under the harsh environment of the limitation of engine space, quality, to improve vertical-transmission critical speed of shaft, designs Without resonance point in engine operating speed range, and nargin is up to 15% or more transmission shaft, is to guarantee that engine stabilizer works It is crucial.

Summary of the invention

The purpose of the present invention: in order to solve to increase in engine fan case, the limitation of transmission shaft installation space, weight are harsh In the case where obtain high transmission shaft precision, so that the working characteristics such as critical speed of drive shaft, reliability is met engine calls, mention A kind of aviation transmission system high speed elongated shaft auxiliary support apparatus out.

Technical solution of the present invention:

A kind of aviation transmission system high speed elongated shaft auxiliary support apparatus, including shell, upper bearing (metal) bushing, lower bearing lining Set, inner spline sleeve, upper bearing (metal), lower bearing, upper seal, lower seal, adjusting washer, the shell upper and lower end face difference It is provided with aprons slot, upper seal, lower seal are separately positioned in aprons slot, the upper bearing (metal) bushing, lower bearing bushing It is separately positioned on the upper and lower end face of shell, the upper bearing (metal), lower bearing are separately positioned on upper bearing (metal) bushing, in lower bearing bushing Portion, the inner spline sleeve are arranged in upper bearing (metal), lower bearing, and the adjusting washer is arranged in upper bearing (metal) bushing and upper axis Between holding.

The upper bearing (metal) bushing, lower bearing bushing are separately fixed at the upper and lower end face of shell, the spiral shell by stud Locking plate and nut are additionally provided in stake.

The shaft shoulder is provided in the inner spline sleeve, the shaft shoulder is between upper bearing (metal), lower bearing.

Through-hole is provided on the shell, the upper bearing (metal) bushing, lower bearing bushing lower part are inserted respectively into shell Through-hole in, and there is a gap in upper bearing (metal) bushing, lower bearing bushing lower part outside wall surface and through-hole wall face, realize upper bearing (metal) lining Clearance fit between set, lower bearing bushing and shell.

The inner spline sleeve is transition fit with upper bearing (metal), lower bearing.

Several installation through-holes are additionally provided on the shell.

The case material is aluminium.

Described shell one end is provided with lightening hole.

Beneficial effects of the present invention: providing a kind of aviation transmission system high speed elongated shaft auxiliary support apparatus, and the present invention is It is generated in the case where engine limited space, high-speed drive, weight are harsh, structure is simple, independent removable, easy for installation；And Convenient for subsequent design series development, practical.

Detailed description of the invention

Attached drawing 1 is the schematic diagram of the section structure of auxiliary support apparatus of the present invention；

Attached drawing 2 is auxiliary support apparatus elongated shaft of the present invention installation support schematic diagram；

Attached drawing 3 is auxiliary support apparatus top view of the present invention；

Identified in figure: 1, shell, 2, upper bearing (metal) bushing, 3, lower bearing bushing, 4, inner spline sleeve, 5, upper bearing (metal), 6, under Bearing, 7, upper seal, 8, lower seal, 9, adjusting washer, 10, stud, 11, locking plate, 12, nut, 13, lightening hole, 14, peace Fill through-hole.

Specific embodiment

The present invention is further introduced with reference to the accompanying drawing, as shown in Figure 1, a kind of aviation transmission system high speed is elongated Axis auxiliary support apparatus, including shell 1, upper bearing (metal) bushing 2, lower bearing bushing 3, inner spline sleeve 4, upper bearing (metal) 5, lower bearing 6, Upper seal 7, lower seal 8, adjusting washer 9,1 upper and lower end face of shell are respectively arranged with aprons slot, upper seal 7, Lower seal 8 is separately positioned in aprons slot, and the upper bearing (metal) bushing 2, lower bearing bushing 3 are separately positioned on the upper of shell 1 Lower end surface, the upper bearing (metal) 5, lower bearing 6 are separately positioned on upper bearing (metal) bushing 2, inside lower bearing bushing 3, the interior flower Key covers 4 and is arranged 6 in upper bearing (metal) 5, lower bearing, and the adjusting washer 9 is arranged between upper bearing (metal) bushing 2 and upper bearing (metal) 5, By measurement upper bearing (metal) 5, lower bearing 6, the axial dimensions such as inner spline sleeve 4, calculate adjusting washer 9 thickness value, selection closes Suitable adjusting washer 9 is packed between upper bearing (metal) bushing 2 and upper bearing (metal) 5.

Wherein, auxiliary support apparatus shell 1 is the basis of elongated shaft support, and shell 1 is equipped with fixed metal (upper bushing Stud 10；Inner spline sleeve 4 is the critical component of elongated shaft support connection, plays a part of connecting input shaft and output shaft, Its circumferential position is limited by the metal (upper inside shell 1, and axial position is by adjusting the adjustment of washer 9；Metal (upper bushing Using O-ring seal end face seal, the present invention is generated in the case where engine limited space, high-speed drive, weight are harsh, Structure is simple, independent removable, easy for installation；And convenient for subsequent design series development, practical.

The upper bearing (metal) bushing 2, lower bearing bushing 3 are separately fixed at the upper and lower end face of shell 1 by stud 10, described Stud 10 on be additionally provided with locking plate 11 and nut 12.

The shaft shoulder is provided in the inner spline sleeve 4, the shaft shoulder is between upper bearing (metal) 5, lower bearing 6, interior flower Key sleeve 4 carries out axially position by the shaft shoulder at both ends.

Through-hole is provided on the shell 1, the upper bearing (metal) bushing 2,3 lower part of lower bearing bushing are inserted respectively into shell In the through-hole of body 1, and there are a gap, axis in realization in upper bearing (metal) bushing 2,3 lower part outside wall surface of lower bearing bushing and through-hole wall face Hold the clearance fit between bushing 2, lower bearing bushing 3 and shell 1.

The inner spline sleeve 4 is transition fit with upper bearing (metal) 5, lower bearing 6, can be convenient disassembly.

It is additionally provided with several installation through-holes 14, preferably four on the shell 1, device of the present invention is installed When, it is positioned by abutment sleeve and engine, and four screws are passed through into four installation through-holes on support device shell 1 14, accessory drive gearbox, auxiliary support apparatus are connected with engine, auxiliary support apparatus and accessory drive is fixed on and starts On machine.

1 material of shell is aluminium, and 1 one end of shell is provided with lightening hole 13, plays the role of mitigating weight.

When using the device of the invention, as shown in Fig. 2, needing that elongated shaft input terminal upper end is first packed into engine central Transmission shaft is bevel gear internal splined, and lower end and Auxiliary support internal spline cooperate, and elongated shaft lower end is further packed into accessory drive dress Set bevel gear internal splined, upper end is connect with Auxiliary support.Auxiliary support apparatus by the abutment sleeve of 1 upper surface of shell with start Location hole positioning on machine body fancase bracket, auxiliary support apparatus by the installation through-hole 14 of 1 lower end surface of shell with it is attached Abutment sleeve positioning on part casing, when machine assembly, first by auxiliary support apparatus, accessory drive, engine body wind It fans casing bracket rigging position to determine by location hole, four stay bolts is then passed through into entire accessory drive gearbox and Auxiliary support fills It sets, bolt is screwed into blower tray threaded hole and is tightened, at this time accessory drive gearbox, auxiliary support apparatus and fancase bracket one It rises and has been fixed on engine, accessory drive gearbox, auxiliary support apparatus weight are all born by four bolts.

The working principle of the invention: in the process of work, the transmission shaft close to engine one end passes torque to elongated shaft Inner spline sleeve 4 is passed, makes inner spline sleeve 4 that there is the revolving speed as engine end transmission shaft, then inner spline sleeve 4 will Revolving speed torque passes to the transmission shaft of accessory drive one end, and driving accessory drive works.It is transmitted in transmission shaft In the course of work of torque, the internal spline of Auxiliary support is lubricated by the lubricating oil that transmission shaft is brought into, and bearing is by starting Lubricating oil inside machine flow to upper bearing (metal) 5 along lubricating oil oil inlet, is lubricated to upper bearing (metal) 5, the lubricating oil after lubricating upper bearing (metal) 5 Lower bearing 6 is lubricated into lubricating cavity, the lubricating oil after lubricating lower bearing 6 is fuel-displaced along 3 inner wall lubricating oil of lower bearing bushing Mouth flows into accessory drive.

To sum up, the invention auxiliary support apparatus can be solved effectively under engine fan case increasing, space limitation The stability for entreating the vertical drive shaft transmission between transmission-accessory drive, guarantees that engine passes in entire working range The normal work of dynamic system.

It should be noted that the above content is in conjunction with specific preferred embodiment to further explaining where the present invention It states, and it cannot be said that a specific embodiment of the invention is only limitted to this, for general technical staff of the technical field of the invention For, without departing from the inventive concept of the premise, several simple deduction or replace can also be made, should be regarded as belonging to this hair Specify fixed protection scope.