CN2206253Y

CN2206253Y - Airplane brake disc

Info

Publication number: CN2206253Y
Application number: CN 94222444
Authority: CN
Inventors: 缪兴起; 李东生; 刘峰; 张连荣; 宋名道
Original assignee: NO 621 INST CHINA AERONAUTICS
Current assignee: Beijing Baimu Aeronautic Material High-Technology Co., Ltd.
Priority date: 1994-09-30
Filing date: 1994-09-30
Publication date: 1995-08-30
Anticipated expiration: 2004-09-30

Abstract

The utility model relates to an airplane brake disc, which belongs to the field of aviation mechanical technique, and the utility model is respectively composed of a constriction ring, a constriction disc, a plurality of movable discs, a plurality of static discs, a bearing disc which are all mutually and tightly abutted. The movable disc is composed of a web structure framework and 15 couples of moving plates of each side, and the moving plates are respectively flanged with vertical compression in back to back by four half-hollow rivets. The static disc is assembled by and composed of a framework and 20 couples of static plates half-hollow rivets, the constriction disc, the bearing disc and the static disc are provided with the same structure, but the constriction disc and the bearing disc are provided with single friction surfaces. The utility model has the advantages of light weight, simple production process, low production cost, etc.

Description

Airplane brake disc

The utility model relates to a kind of aircraft brake disc, belongs to the aviation machine technical field.

In the prior art, Ilyushin-86 aircraft is the large-scale expanded letter visitor of civil aviaton (goods) machine of Russian Ilyushin airplane design office the seventies development, can hold 350 of passengers, and take-off weight reaches 215 tons, drops into the course line in 1980 and uses.Its main wheel brake gear adopts polydisc system (compression plate, six Moving plates, five quiet dishes and a bearing disc).Intrinsic compression plate skeleton is seen Fig. 1; The Moving plate skeleton is seen Fig. 2; Quiet dish skeleton is seen Fig. 3.In order to alleviate the deadweight of aircraft as much as possible, increase transport power, its all diskware skeletons are selected light titanium alloy (proportion is 4.526) material at all costs for use, the therefore inevitable technology difficulty that increases, its expensive raw MAT'L becomes tens extraordinarily big costs.Intrinsic in addition skeleton is a plank frame, and dynamic and static becomes rigid member with skeleton by the solid rivet riveting, and the contact coefficient of each key is low, and dynamically degree of freedom is poor, discontinuity, and problem such as thermal stress and distortion are big also is to produce the factor that other part lost efficacy.Secondly when changing compression plate, must extract complicated program such as torsion tube and piston room, bring many difficulties to maintenance.It is improper sometimes to operate, and very easily damages miscellaneous part, causes damage or brings hidden danger.If the airport does not have special tool and hydraulic efficiency equipment, just can't keep in repair.

The purpose of this utility model is the aircraft brake disc of a kind of novel structure of design, and each parts of prior art are carried out the improvement of shape, structure, so that the brake disc weight reduction is simplified production technology, reduces the productive costs of brake disc.

The later-model content of this reality is:

The aircraft brake disc comprises a compression plate, six Moving plates, five quiet dishes and a bearing disc.Hold-down ring is connected by the pull bar on the cylinder block in the internal key of the sole hole of garden Zhou Junbu and inside circumference and aircraft brake device.Moving plate is made up of Moving plate skeleton and moving plate.The Moving plate skeleton is an arachnoid, and each netted fin is provided with external key, and the corresponding keyway in this external key and the aircraft brake device on the wheel hub connects.Moving plate is sintered into one by friction lining and steel backing and forms, and steel backing is provided with rivet hole for four jiaos, and there is the aiding support boss centre.Per two moving plates lean against privately and are riveted on the fin of skeleton from skeleton two sides, and friction lining outwardly.Quiet dish is made up of quiet dish skeleton and still, and the circumference of quiet dish skeleton is provided with lightening hole, rivet hole and opening groove, and interior week is provided with internal key, and this internal key is connected with torsion tube in the aircraft brake device.Still is sintered into one by friction lining and steel backing and forms, and respectively has rivet hole on friction lining and the steel backing, and per two stills lean against privately from skeleton two sides, are riveted on the skeleton by rivet hole on the skeleton and opening groove, and friction lining outwardly.Compression plate and bearing disc all are made up of still skeleton and still, and single still is riveted on the skeleton from a side of skeleton.Brake disc is superimposed with each other by hold-down ring, compression plate, Moving plate, quiet dish and bearing disc successively and forms.

Description of drawings:

Fig. 1～Fig. 3 is compression plate skeleton in the prior art, Moving plate skeleton and quiet dish skeleton structure scheme drawing.

Fig. 4-the 1st, the Moving plate that has assembled, Fig. 4-the 2nd, Moving plate skeleton structure scheme drawing, Fig. 4-the 3rd, moving plate structural representation, Fig. 4-the 4th, the A-A section-drawing of Fig. 4-3, Fig. 4-the 5th, core rivet arrangement scheme drawing in midair.

Fig. 5-the 1st, the quiet dish that has assembled, Fig. 5-the 2nd, quiet dish skeleton structure scheme drawing, Fig. 5-the 3rd, still, Fig. 5-the 4th, the A-A section-drawing of Fig. 5-3.

Fig. 6-the 1st, compression plate that assembles or bearing disc, Fig. 6-the 2nd, the A-A section-drawing of Fig. 6-1.

Fig. 7 is the utility model design-calculated hold-down ring structural representation.

Fig. 8 is an application example scheme drawing of the present utility model.

Below in conjunction with accompanying drawing, introduce content of the present utility model in detail.

Among Fig. 4-1～Fig. 4-5, the 1st, the Moving plate that has assembled, the 2nd, the external key on the Moving plate skeleton, the 3rd, netted fin, the 4th, rivet hole, the 5th, steel backing, the 6th, core rivet in midair, the 7th, friction lining, the 8th, the rivet hole on the steel backing.

Among Fig. 5-1～Fig. 5-4, the 11st, the quiet dish that has assembled, the 12nd, the internal key of quiet dish skeleton, the 13rd, rivet hole, the 14th, lightening hole, the 15th, opening groove, the 16th, still, the 17th, steel backing, the 18th, friction lining, the 19th, the rivet hole on the steel backing.

Among Fig. 6-1～Fig. 6-2, the 21st, compression plate that has assembled or bearing disc, the 22nd, friction lining, the 23rd, skeleton, the 24th, steel backing.

Among Fig. 7, the 31st, hold-down ring, the 32nd, sole hole, the 33rd, internal key.

Among Fig. 8, the 41st, the piston room, the 42nd, piston, the 43rd, the torsion tube, the 44th, clearance adjuster, the 45th, return spring, the 46th, sleeve, the 47th, pull bar, the 48th, bearing ring, 49 is half snap rings, the 50th, wheel hub.

Moving plate leans against privately by 15 pairs of moving plates (Fig. 4-2) on an arachnoid skeleton (Fig. 4-1) and every limit, and each forms with 4 " core in midair " rivet vertical compression flange.Because the skeleton rivet hole is greater than rivet diameter 0.9mm, had necessarily from adjust the play, can eliminate partly thermal deformation and thermal stress.It connects by the corresponding keyway with wheel hub of 15 external keys such as branch such as grade on the skeleton, rotates one along with wheel and is referred to as Moving plate.

Three aiding support boss on the moving plate steel backing can strengthen the rigidity of moving plate, guarantee friction material blank and steel backing double burned location simultaneously.

Quiet dish is assembled (seeing Fig. 5-1) by one through strength checking attenuate 1mm and skeleton (Fig. 5-2) and every limit with lightening hole by " core in midair " rivet by 20 pairs of stills (Fig. 5-3).Be connected with the torsion tube by the grade of 16 on skeleton branch internal key, can not rotate one and be referred to as quiet dish.

The structure of compression plate and bearing disc is identical, is the quiet dish of single friction face.It assembles (see figure 6) by a skeleton and 20 stills by " core in midair " rivet.The improvement of compression plate maximum is the former skeleton thickness of attenuate, designs hold-down ring separately, (see figure 7).It is connected with pull bar on the cylinder block and needn't changes during to the limit in the friction lining abrasion, and cost saving also makes the work of loading and unloading compression plate become easy, only needs equally unload from torsion tube front with other dynamic and static dishes, is convenient to maintenance.

Cylinder one end of the above-mentioned used rivet of core in midair has aperture, hole depth be cylinder long 1/3rd.

The working process of the utility model design-calculated brake disc is as follows:

Brake gear is actually a secondary performance-oriented universe friction clutch, high-speed along with modern jetliner, large-tonnage requirement, the brake disc pair must have the braking efficiency height, and thermodynamic state is good, and the life-span is long, volume is little, in light weight, compact conformation, advantage such as safe and reliable.The present age, state-of-the-art aircraft brake all adopted polydisc system, and the brake gear numbering " CKT-171 " of Ilyushin-86 aircraft main wheel is exactly six moving plate types, and its structural representation is seen Fig. 8.

General multiple-disc brake device is made of three parts, i.e. brake disc pair (compression plate, Moving plate, quiet dish, bearing disc); Load-carrying construction spare (brake torsion tube and high strength bolt); The hydraulic efficiency pressure system carrier mainly contains the piston room, piston and clearance adjuster etc.

Aircraft is aviator's controlled hydraulic system switch when taking off, land, turning and stopping, 12 uniform pistons 42 in the piston room 41, outwards promote hold-down ring 31, force compression plate 21, Moving plate 1, quiet dish 11, and bearing disc 21, between fit tightly, be fixed in the torsion tube groove because of bearing ring 48 relies on half snap ring 49,, will produce damping moment as between each dynamic and static dish relative motion being arranged, wheel is slowed down, until stop.Spline and Moving plate suit are arranged on the wheel hub 50, and the spline on the torsion tube 43 cooperates with quiet dish female splines, constitutes the relative motion friction pair.If aircraft will slide or when quickening to take off, releasing of brake, the decompression of piston room, return spring 45 evenly retracts hold-down ring by 9 uniform pull bars 47, along with abrasion clearance adjuster 44 automatic compensations to certain position, remaining has enough gaps between each sheet, do not have and drag the phenomenon of stopping.

Claims

1, a kind of aircraft brake disc, comprise a compression plate, six Moving plates, five quiet dishes, a bearing disc, it is characterized in that also comprising a hold-down ring, described hold-down ring is connected by the pull bar on the cylinder block in the internal key of the sole hole of garden Zhou Junbu and inside circumference and aircraft brake device; Described Moving plate is made up of Moving plate skeleton and moving plate, the Moving plate skeleton is an arachnoid, each netted fin is provided with external key, corresponding keyway in this external key and the aircraft brake device on the wheel hub connects, moving plate is sintered into one by friction lining and steel backing and forms, and steel backing is provided with rivet hole for four jiaos, and there is the aiding support boss centre, per two moving plates lean against privately and are riveted on the fin of skeleton from skeleton two sides, and friction lining outwardly; Described quiet dish is made up of quiet dish skeleton and still, the circumference of quiet dish skeleton is provided with lightening hole, rivet hole and opening groove, interior week is provided with internal key, this internal key is connected with torsion tube in the aircraft brake device, still is sintered into one by friction lining and steel backing and forms, and respectively has rivet hole on friction lining and the steel backing, and per two stills lean against privately from skeleton two sides, be riveted on the skeleton by rivet hole on the skeleton and opening groove, friction lining outwardly; Described compression plate and bearing disc all are made up of quiet dish skeleton and still, and single still is riveted on the skeleton from a side of skeleton; Described brake disc is superimposed with each other by hold-down ring, compression plate, Moving plate, quiet dish and bearing disc successively and forms.

2, a kind of brake disc as claimed in claim 1 is characterized in that rivet that wherein said moving plate and the riveted joint mutually of Moving plate skeleton, still and quiet dish skeleton rivet usefulness mutually is core rivet in midair, and cylinder one end of rivet has aperture, hole depth be cylinder long 1/3.