CN106763343A - A kind of aviation spring shell type automatic gap adjusting piston component - Google Patents
A kind of aviation spring shell type automatic gap adjusting piston component Download PDFInfo
- Publication number
- CN106763343A CN106763343A CN201710086989.6A CN201710086989A CN106763343A CN 106763343 A CN106763343 A CN 106763343A CN 201710086989 A CN201710086989 A CN 201710086989A CN 106763343 A CN106763343 A CN 106763343A
- Authority
- CN
- China
- Prior art keywords
- piston
- spring
- gap
- pull bar
- sleeve
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/72—Slack adjusters hydraulic
- F16D65/74—Slack adjusters hydraulic self-acting in one direction
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/04—Cylinders
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/06—Pistons
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a kind of aircraft brake system, more particularly to a kind of aviation spring shell type automatic gap adjusting piston component, it is possible to increase piston component performance, the probability of piston not return is reduced, it is ensured that airplane wheel brake performance.A kind of aviation spring shell type piston assembly structure that the present invention is provided, is made up of bushing, piston, blind nut, pull bar, sleeve, support bushing, sealing ring, heat insulating mattress, jump ring, guard circle, spring, spring housing guard circle and pad.The power ratio of spring housing chucking power and return spring elastic force uses 2.3 ratios, improves spring housing and accommodates power, it is ensured that accommodates the stability of power using rear spring housing for a long time；A groove is opened in internal piston bottom surface, and groove import cuts with guiding chamfering, and external bottom end is a U-shaped protrusion, and chimb has the rounding more than R3；Pull bar extended length, extends to piston base groove floor, and there is chamfering on pull bar top, corresponding with groove import chamfering to prevent from colliding with；Sleeve bottom has small―gap suture with piston base, is used to eliminate hydraulic coupling.
Description
Technical field
The present invention relates to aircraft brake field, more particularly to a kind of aviation spring shell type automatic gap adjusting piston component knot
Structure.
Background technology
The spring shell type automatic gap adjusting piston component used in service aircraft brake machine wheel, collection applies brake and piston return
Function can in time stretch out in one when aircraft applies brake pressure, compress brake disc and produce braking, be lived during revocation brake pressure
Timely automated retraction is filled in, and as brake disc is increased using abrasion, braking gap can be automatically adjusted.
Spring shell type automatic gap adjusting piston component, by bushing 1, piston, blind nut, pull bar 6, sleeve 10, support bushing 7, close
Seal 12, heat insulating mattress 4, jump ring 3, guard circle, spring, the guard circle of spring housing 9 and pad composition.Blind nut passes through screw thread with piston 2
Connection, and support spring one end；The large end face support spring other end of sleeve 10, small end face is supported by spring housing 9, and with blind nut it
Between formed and adjust gap gap；Spring housing 9 wraps the chucking power of the formation of pull bar 6 more than spring full compression elastic force, makes each parts relative
Piston 2 is static；When piston 2 is moved under action of hydraulic force, if displacement is no more than gap gap is adjusted, spring force is not enough to
Push the spring set 9 is moved；With brake wear and tear, the overhang of piston 2 increase and more than adjust gap gap when, action of hydraulic force is in piston
On 2, cover 9 by the blind nut push the spring for fastening and move, generation is approximately equal to the movement of brake disc wear extent, so as to realize automatic tune
Gap, and remain certain braking gap.
The spring shell type automatic gap adjusting piston component of many types of aircraft utilization of active service, is designed, its bullet according to HB/Z126
Spring covers 9 chucking powers should be not less than 2 with spring force ratio, but many types of power ratio is about 2 brake machine wheel, in use also
Be not used to the longevity or reach reprocess the phase when, gradually relatively frequently occur piston not return phenomenon.The not piston component of return
Braking state can be caused cannot be released completely, all the time with certain braking effect, if excluding not in time, can hold brake disc temperature
Height of continuing rising, causes fire damage, even results in aircraft yaw, brings potential safety hazard.
Return reason is not more for piston, and main cause is that the chucking power itself of spring housing 9 produces fluctuation, decay, or damping
It is larger.The structure of a kind of fastening cluster spring set that Patents are proposed, it is possible to decrease the fluctuation of spring housing chucking power is so as to improve
Its stability, but support bushing 7 is larger with space needed for the screw threads for fastening of sleeve 10, it is impossible to adapt to that diameter is smaller, structure space is tight
The spring shell type automatic gap adjusting piston component for gathering.
The content of the invention
Goal of the invention
It is to provide a kind of aviation spring shell type automatic gap adjusting piston component that the purpose of the present invention is, can significantly improve boat
The sky functional reliability of spring shell type piston component, and the less piston component of applicable diameter.
Technical scheme content
A kind of aviation spring shell type automatic gap adjusting piston component, it includes bushing 1, piston 2, blind nut 8, pull bar 6, sleeve
10th, support bushing 7, sealing ring 12, heat insulating mattress 4, jump ring 3, guard circle 13, spring 5, spring housing 9 and packing ring 11, bushing 1 pass through
It is threadably secured on brake gear cylinder seat, pull bar 6 is concentric with bushing 1 to be installed, and by bushing 1 and the large end face axial direction of pull bar 6
It is spacing；Piston 2 is coaxial with bushing 1, can move axially；Blind nut 8 is connected through a screw thread with piston 2, and support spring 5 one
End；The other end of 10 large end face support spring of sleeve 5, small end face is supported by spring housing 9, and tune gap gap is formed between blind nut 8；
Support bushing 171 is arranged in sleeve 10, the structure space for filling spring housing 9 and the small end face side bottom surface of piston 2；Packing ring
11 are arranged between the large end face of sleeve 10 and spring 5, for increasing the decrement of spring 5；Heat insulating mattress 4 is arranged on the bottom surface of piston 2, leads to
Jump ring 3 is crossed to be connected with piston 2；Sealing ring 12, guard circle 13 are used to seal；When piston 2 is moved under action of hydraulic force, if moving
No more than gap gap is adjusted, the elastic force of spring 5 is not enough to push the spring set 9 and moves dynamic distance；As brake is worn and torn, the overhang of piston 2
Increase and more than adjust gap gap when, action of hydraulic force on the piston 2, by fasten the push the spring of blind nut 8 cover 9 move, produce
It is approximately equal to the movement of brake disc wear extent, so as to realize automatic gap adjusting, and remains certain braking gap.
Preferably, spring housing 9 wrap the chucking power of the formation of pull bar 6 more than 2.3 times of springs 5 full compression elastic force, and be higher than
2 times of requirements of HB/Z126 standards regulation, can make each parts keep geo-stationary, and working condition keeps stabilization.
Preferably, the bottom of piston 2 uses groove structure, and its groove diameter of bore is slightly larger than the diameter of pull bar 6, and depth is according to bullet
Spring covers 9 installing space demands and accordingly increases, and to be applicable the installation of bigger specification, greater number spring housing 9, clamps spring housing 9
Power is not less than 2.3 with the elastic force power ratio of spring 5.
Preferably, groove inner port edge uses 30 ° of chamferings, pull bar 6 is formed guiding with the groove of piston 2, it is to avoid damage of colliding with
Wound, while ensureing that support bushing 7 has enough contact surfaces with the bottom surface of piston 2；
Preferably, the gap not less than 0.5mm is arranged at the bottom of sleeve 10 and the bottom of piston 2, for eliminating the large end face of sleeve 10
The hydraulic pressure tension force formed with the bottom surface of piston 2.
Preferably, the fillet of groove topography top margin A is not less than R3, is easy to the installation of heat insulating mattress 4 and piston 2, while ensureing
The bottom surface intensity of piston 2.
The advantage of invention
To verify effect of the present invention, the brake machine wheel of the spring shell type automatic gap adjusting piston component used certain type, application
Piston return effect before and after the present invention is verified that simulation line situation is impacted by applying brake pressure, accelerated
Working cycles, are operated cyclic test under the environment such as room temperature, 150 DEG C of high temperature, -55 DEG C of low temperature respectively.
By checking, not return phenomenon is not occurred in that using piston component of the invention, and apply piston group of the invention
There is not the not return phenomenon of piston 2, and super about 2 times of the application secondary piston component operation cycle-index of working cycles number of times in part.According to
The type product outfield occur piston not return phenomenon when life situations estimation, surpassed using piston component working cycles of the invention
Cross product to reprocess the phase, or even beyond product entire life, can effectively solve aviation spring shell type automatic gap adjusting piston component and not return
Position phenomenon, improves functional reliability.
Brief description of the drawings
Accompanying drawing 1 is piston assembly structure schematic diagram of the invention；
Accompanying drawing 2 is active service piston assembly structure schematic diagram；
Accompanying drawing 3 is piston structure schematic diagram of the invention；
Specific embodiment
The present embodiment is the piston component in a kind of brake machine wheel casing top half holder assembly for aircraft.
As shown in figure 1, the present embodiment is for the piston component in aircraft brake machine wheel casing top half holder assembly.It is described
Piston component includes bushing 1, piston 2, jump ring 3, heat insulating mattress 4, spring, pull bar 6, support bushing 7, blind nut, spring housing 9, sleeve
10th, packing ring 11, sealing ring 12 and guard circle.Piston component is arranged in the plunger shaft of cylinder seat.
During brake, brake-fluid force feed enters plunger shaft, piston 2 under brake oil pressure effect, along pull bar together with blind nut 8
6 move forward, compression spring 5, and piston 2 drives heat insulating mattress 4 to promote compression plate to be axially moveable, and compression plate compresses quiet disk, pressure-bearing
Disk and Moving plate produce moment of friction, brake wheel；When getting off the brakes, the pressure releases in the chamber of piston 2, piston 2 and blind nut 8 are received
Acted on to the spring 5 for being compressed, return to origin-location, unclamp carbon brake disc, release brake.
Carbon brake disc can wear and tear in use, and the impulse stroke of piston 2 can gradually increase.When the stroke of piston 2 is more than
During tune gap gap between blind nut and sleeve 10, under hydraulic pressure effect, piston 2 is moved forward, and drives blind nut to be pressed in sleeve
On 10, sleeve 10 is driven spring housing 9, support bushing 7, the frictional force between pull bar 6 and spring housing 9 is overcome, before pull bar 6
" △ " distance is moved, now, total distance of the movement of piston 2 is L=X+ △.Releasing of brake, spring 5 restPoses, but by
Frictional force between pull bar 6 and spring housing 9 is bigger than the active force of spring, and piston 2 can only return X mm under the action of the spring, now
Piston 2 compared to before brake more has stretched out " △ " value.Braking gap can be thus set to remain at the scope being pre-designed
It is interior, so as to control the stroke of piston 2, improve the sensitivity of brake.
Claims (6)
1. a kind of aviation spring shell type automatic gap adjusting piston component, it includes bushing (1), piston (2), blind nut (8), pull bar
(6), sleeve (10), support bushing (7), sealing ring (12), heat insulating mattress (4), jump ring (3), guard circle (13), spring (5), spring
Set (9) and packing ring (11), it is characterised in that：Bushing (1) is threadably secured on brake gear cylinder seat, pull bar (6) with lining
Set (1) is installed with one heart, and by bushing (1) and pull bar (6) large end face axial limiting；Piston (2) is coaxial with bushing (1), can
Move axially；Blind nut (8) is connected through a screw thread with piston (2), and support spring (5) one end；Sleeve (10) large end face is supported
Spring (5) other end, small end face is supported by spring housing (9), and tune gap gap is formed between blind nut (8)；Support bushing (1) 71
In sleeve (10), the structure space for filling spring housing (9) and piston (2) small end face side bottom surface；Packing ring (11)
Between sleeve (10) large end face and spring (5), for increasing spring (5) decrement；Heat insulating mattress (4) is installed in piston
(2) bottom surface, is connected by jump ring (3) with piston (2)；Sealing ring (12), guard circle (13) are for sealing；When piston (2) is in liquid
When pressure effect is lower mobile, if displacement is no more than gap gap is adjusted, it is mobile that spring (5) elastic force is not enough to push the spring set (9)；
With brake wear and tear, piston (2) overhang increase and more than adjust gap gap when, action of hydraulic force on piston (2), by fastening
Blind nut (8) push the spring set (9) it is mobile, generation is approximately equal to the movement of brake disc wear extent, so as to realize automatic gap adjusting, and begins
Certain braking gap is kept eventually.
2. piston component as claimed in claim 1, it is characterised in that：The chucking power that spring housing (9) wraps pull bar (6) formation is big
Full compression elastic force is obtained in 2.3 times of springs (5), and higher than 2 times of requirements that HB/Z126 standards specify, can keep each parts
Geo-stationary, and working condition keeps stabilization.
3. piston component as claimed in claim 1, is further characterized in that：Piston (2) bottom uses groove structure, in its groove
Bore dia is slightly larger than pull bar (6) diameter, and depth accordingly increases according to spring housing (9) installing space demand, be applicable bigger specification,
The installation of greater number spring housing (9), makes spring housing (9) chucking power be not less than 2.3 with spring (5) elastic force power ratio.
4. piston component as claimed in claim 1, is further characterized in that：Groove inner port edge uses 30 ° of chamferings, makes pull bar
(6) guiding is formed with piston (2) groove, it is to avoid damage of colliding with, while ensureing that support bushing (7) has enough with piston (2) bottom surface
Contact surface.
5. piston component as claimed in claim 1, is further characterized in that：Sleeve (10) bottom has not small with piston (2) bottom
In the gap of 0.5mm, for eliminating the hydraulic pressure tension force that sleeve (10) large end face is formed with piston (2) bottom surface.
6. piston component as claimed in claim 1, is further characterized in that：The fillet of groove topography top margin A is not less than R3, is easy to
The installation of heat insulating mattress (4) and piston (2), while ensureing piston (2) bottom surface intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086989.6A CN106763343A (en) | 2017-02-17 | 2017-02-17 | A kind of aviation spring shell type automatic gap adjusting piston component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086989.6A CN106763343A (en) | 2017-02-17 | 2017-02-17 | A kind of aviation spring shell type automatic gap adjusting piston component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106763343A true CN106763343A (en) | 2017-05-31 |
Family
ID=58957341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710086989.6A Pending CN106763343A (en) | 2017-02-17 | 2017-02-17 | A kind of aviation spring shell type automatic gap adjusting piston component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106763343A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242679A (en) * | 2019-05-31 | 2019-09-17 | 陕西法士特齿轮有限责任公司 | A kind of automatic transmission transmission device |
| CN111503191A (en) * | 2020-04-22 | 2020-08-07 | 西安航空制动科技有限公司 | Piston gap adjusting device and aviation brake device piston |
| CN111824399A (en) * | 2020-06-05 | 2020-10-27 | 贵州新安航空机械有限责任公司 | Synchronous locking mechanism about aircraft is with wheel |
| CN112696446A (en) * | 2020-12-30 | 2021-04-23 | 贵州新安航空机械有限责任公司 | Automatic clearance mechanism of transferring of expansion sleeve formula |
| CN113944708A (en) * | 2021-10-17 | 2022-01-18 | 西安航空制动科技有限公司 | Expanding tube type automatic gap-adjusting piston mechanism |
| CN116292690A (en) * | 2023-05-19 | 2023-06-23 | 临工重机股份有限公司 | Brake with self-adjusting brake clearance and self-adjusting method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4180147A (en) * | 1978-04-03 | 1979-12-25 | The Bendix Corporation | Integral piston and adjuster for a brake |
| FR2503283A1 (en) * | 1981-04-02 | 1982-10-08 | Messier Hispano Sa | Actuator for disc brake - has piston travel limited by combination of three stops on piston, rod and sleeve |
| US4529068A (en) * | 1983-06-28 | 1985-07-16 | Goodyear Aerospace Corporation | Integral disk brake actuator and adjuster |
| CN104061261A (en) * | 2014-05-27 | 2014-09-24 | 西安航空制动科技有限公司 | Automatic interval-adjusting force-restoring mechanism |
| CN104976255A (en) * | 2014-04-01 | 2015-10-14 | 梅西耶-布加蒂-道提公司 | Brake actuator for an aircraft wheel hydraulic brake |
| CN105156516A (en) * | 2015-09-29 | 2015-12-16 | 西安航空制动科技有限公司 | Steel pressure-bearing disc assembly for brake device |
-
2017
- 2017-02-17 CN CN201710086989.6A patent/CN106763343A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4180147A (en) * | 1978-04-03 | 1979-12-25 | The Bendix Corporation | Integral piston and adjuster for a brake |
| FR2503283A1 (en) * | 1981-04-02 | 1982-10-08 | Messier Hispano Sa | Actuator for disc brake - has piston travel limited by combination of three stops on piston, rod and sleeve |
| US4529068A (en) * | 1983-06-28 | 1985-07-16 | Goodyear Aerospace Corporation | Integral disk brake actuator and adjuster |
| CN104976255A (en) * | 2014-04-01 | 2015-10-14 | 梅西耶-布加蒂-道提公司 | Brake actuator for an aircraft wheel hydraulic brake |
| CN104061261A (en) * | 2014-05-27 | 2014-09-24 | 西安航空制动科技有限公司 | Automatic interval-adjusting force-restoring mechanism |
| CN105156516A (en) * | 2015-09-29 | 2015-12-16 | 西安航空制动科技有限公司 | Steel pressure-bearing disc assembly for brake device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242679A (en) * | 2019-05-31 | 2019-09-17 | 陕西法士特齿轮有限责任公司 | A kind of automatic transmission transmission device |
| CN110242679B (en) * | 2019-05-31 | 2024-01-02 | 陕西法士特齿轮有限责任公司 | Transmission device for automatic transmission |
| CN111503191A (en) * | 2020-04-22 | 2020-08-07 | 西安航空制动科技有限公司 | Piston gap adjusting device and aviation brake device piston |
| CN111824399A (en) * | 2020-06-05 | 2020-10-27 | 贵州新安航空机械有限责任公司 | Synchronous locking mechanism about aircraft is with wheel |
| CN112696446A (en) * | 2020-12-30 | 2021-04-23 | 贵州新安航空机械有限责任公司 | Automatic clearance mechanism of transferring of expansion sleeve formula |
| CN113944708A (en) * | 2021-10-17 | 2022-01-18 | 西安航空制动科技有限公司 | Expanding tube type automatic gap-adjusting piston mechanism |
| CN113944708B (en) * | 2021-10-17 | 2023-08-18 | 西安航空制动科技有限公司 | Automatic gap adjusting piston mechanism of expansion pipe type |
| CN116292690A (en) * | 2023-05-19 | 2023-06-23 | 临工重机股份有限公司 | Brake with self-adjusting brake clearance and self-adjusting method thereof |
| CN116292690B (en) * | 2023-05-19 | 2023-07-25 | 临工重机股份有限公司 | Brake with self-adjusting brake clearance and self-adjusting method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |