CN109882520A - A kind of fail safe structure on diaphragm coupling - Google Patents
A kind of fail safe structure on diaphragm coupling Download PDFInfo
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- CN109882520A CN109882520A CN201811623100.4A CN201811623100A CN109882520A CN 109882520 A CN109882520 A CN 109882520A CN 201811623100 A CN201811623100 A CN 201811623100A CN 109882520 A CN109882520 A CN 109882520A
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- membranous disc
- external splines
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- internal spline
- short
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Abstract
The invention belongs to diaphragm coupling technical fields, disclose the fail safe structure on a kind of diaphragm coupling, wherein, the inner wall of short membranous disc is equipped with inner sleeve, inner sleeve one end extends to inside long membranous disc, and its outer wall is provided with external splines, the inner wall of long membranous disc is provided with internal spline compatible with external splines, and there are gaps between external splines and internal spline；Present invention exterior space that is light-weight and being not take up shaft coupling；And the torque of super operating condition can be shared, when torque is more than maximum allowable value, external splines and internal spline start to contact on circumferential direction, participate in transmitting torque, limit axial displacement and angular displacement is more than maximum duty；Simultaneously when membranous disc breakage, when maximum angular displacement transfinites, the edge of external splines can be with internal spline dieback, generating a counter-force resistance prevents angular displacement from further increasing, torque is transmitted in a short time by spline, operator's having time is made to take safety measures, and prevents the generation of bigger disaster.
Description
Technical field
The invention belongs to diaphragm coupling technical fields, and in particular to the fail safety knot on a kind of diaphragm coupling
Structure.
Background technique
In rotating machinery field, between two spindle nose of prime mover and working machine due to static installation error and work when due to
The reasons such as hot and cold, vibration will cause spindle nose and inevitably there is radial error, angular error and axial error.These errors
It will lead to shafting abnormal vibrations, bearing load increase, or even equipment caused to damage, cause serious safety accident.It is mounted on shaft part
Between diaphragm coupling can be absorbed to greatest extent while transmitting torque each to error, keep axis especially high speed shafting steady
Operation.Metallic flex shaft coupling of the diaphragm coupling as latest generation, is widely used in chemical machinery, gyroplane, fixed-wing
The fields such as aircraft, naval vessel, high-precision numerical control machine and various high-speed test (HST) platforms.During equipment operation, diaphragm coupling
As a fatigue component, inevitably will appear damage, Wear cause is as follows: have reached its service life cause damage,
Super operating condition operation causes damage, self-defect (fault in material, manufacturing deficiency etc.) to cause its damage.Diaphragm coupling is as shafting
In key components and parts, destruction will cause two big consequences, and one, working machine are shut down, and can not work normally；Secondly, damage
Shaft part flies out among shaft coupling, causes secondary injury to equipment.As being used as line shaft diaphragm coupling on gyroplane, once damage
Engine can not just pass to power main paddle, and aircraft will run out of steam, and will cause fatal crass, gyroplane tailing axle when serious
Once damaging, tail-rotor will run out of steam upper diaphragm coupling, may also equally cause fatal crass.
Currently used shaft coupling is also without truly fail safe structure, in civil field frequently in shaft coupling
The very bulky protective cover of outer surface cover one, effect are only that membranous disc after preventing breakage throws away and causes secondary injury；In army
It with field, is limited by weight, protective cover is also cancelled, this there is great security risk.
Summary of the invention
Of the existing technology in order to solve the problems, such as, the present invention provides a kind of membranous disc of light-weight, not additional occupied space
Fail safe structure on shaft coupling, technical solution are as follows:
A kind of fail safe structure on diaphragm coupling, the structure includes short membranous disc, inner sleeve and long membranous disc, short film
Disk, inner sleeve, long membranous disc are coaxially disposed with the jackshaft of shaft coupling, and the end of short membranous disc and long membranous disc is respectively arranged with membranous disc
Portion is fixedly connected between the membranous disc portion of short membranous disc and the membranous disc portion of long membranous disc, and two membranous disc portions are fixedly connected with composition membranous disc, short film
The inner wall of disk is equipped with inner sleeve, and inner sleeve one end extends to inside long membranous disc, and its outer wall is provided with external splines, the inner wall of long membranous disc
It is provided with internal spline compatible with external splines, there are gaps between external splines and internal spline.
Defining the radial clearance between external splines and internal spline is δ1, the radial clearance between external splines and internal spline is δ2,
Axial gap between external splines and internal spline is δ3；
δ1=θmax× r=Tmax/CT；
Wherein, wherein θmaxRelative rotation when occurring for peak torque between two membranous discs, r are the radius at spline occlusion,
TmaxFor maximum allowable torque value, CTFor the torsion stiffness of membranous disc；
δ2=βmax× Δ l=Mmax/Cw；
Wherein, wherein βmaxFor maximum allowable angular error, when Δ l is that angle error occurs, outside center of rotation to external splines
The distance of edge, MmaxFor maximum allowable moment, CwFor the bending stiffness of membranous disc；
δ3=Fnmax/Ca；
Wherein FnmaxFor maximum allowable axial force, CaFor the axis rigidity of membranous disc.
It is interference fitted between the outer wall of the inner sleeve and the inner wall of short membranous disc, the requirement of magnitude of interference is, after membranous disc is damaged
When transmitting torque by spline, not opposite sliding between short membranous disc and inner sleeve.
Compared with prior art, the beneficial effects of the present invention are:
1, present invention exterior space that is light-weight and being not take up shaft coupling；
2, structure of the invention can share the torque of super operating condition, when torque is more than maximum allowable value, external splines and interior flower
Key starts to contact on circumferential direction, participates in transmitting torque, limits axial displacement and angular displacement is more than maximum duty；
3, when membranous disc breakage, when maximum angular displacement transfinites, the edge of external splines can generate one instead with internal spline dieback
Mechanical resistance prevents angular displacement from further increasing, and transmits torque in a short time by spline, makes operator's having time that safety be taken to arrange
It applies, prevents the generation of bigger disaster.
4, when membranous disc axially loaded be more than maximum allowable value when, inner sleeve will dieback on the jackshaft of long membranous disc, prevent
Axial displacement further increases, and long membranous disc and short membranous disc are when membranous disc portion is broken, the internal spline of the external splines of inner sleeve and long membranous disc
It will contact, continue to transmit power, and effectively prevent jackshaft from throwing away.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of the short membranous disc of the present invention；
Fig. 3 is the structural schematic diagram of inner sleeve of the present invention；
Fig. 4 is the structural schematic diagram of the long membranous disc of the present invention；
Fig. 5 is the cooperation schematic diagram of internal spline of the present invention and external splines；
Fig. 6 is the partial enlargement diagram of Fig. 5；
The axial cross-sectional views that Fig. 7 cooperates for the short membranous disc of the present invention, inner sleeve, long membranous disc；
Fig. 8 is the structural schematic diagram using the diaphragm coupling of fail safe structure.
Wherein: short membranous disc 1；Inner sleeve 2；External splines 21；Long membranous disc 3；Internal spline 31；The membranous disc portion 4 of short membranous disc；Long membranous disc
Membranous disc portion 5；Jackshaft 6.
Specific embodiment
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
As shown in Figures 1 to 8, the present invention provides the fail safe structure on a kind of diaphragm coupling, the structures
Including short membranous disc 1, inner sleeve 2 and long membranous disc 3, short membranous disc 1, inner sleeve 2, long membranous disc 3 are coaxially disposed with the jackshaft of shaft coupling 6,
The end of short membranous disc 1 and long membranous disc 3 is respectively arranged with membranous disc portion, 5 band of membranous disc portion in the membranous disc portion 4 of short membranous disc 1 and long membranous disc 3
Along being oppositely arranged on one side for side, and integral using vacuum electron beam welding, to further increase the structural strength of membranous disc, two
Membranous disc portion is fixedly connected with composition membranous disc, and the inner wall of short membranous disc 1 is equipped with inner sleeve 2, and the outer wall of the inner sleeve 2 is interior with short membranous disc 1
Be interference fitted between wall, the requirement of magnitude of interference is, when transmitting torque by spline after membranous disc is damaged, short membranous disc 1 and inner sleeve 2 it
Between not opposite sliding, 2 one end of inner sleeve extends to inside long membranous disc 3, and its outer wall is provided with external splines 21, the inner wall of long membranous disc 3
It is provided with internal spline 31 compatible with external splines 21, there are gaps between external splines 21 and internal spline 31.
Defining the radial clearance between external splines 21 and internal spline 31 is δ1, radial direction between external splines 21 and internal spline 31
Gap is δ2, the axial gap between external splines 21 and internal spline 31 is δ3；
δ1=θmax× r=Tmax/CT；
Wherein, wherein θmaxRelative rotation when occurring for peak torque between two membranous discs, r are the radius at spline occlusion,
TmaxFor maximum allowable torque value, CTFor the torsion stiffness of membranous disc；
δ2=βmax× Δ l=Mmax/Cw；
Wherein, wherein βmaxFor maximum allowable angular error, when Δ l is that angle error occurs, center of rotation to external splines 21
The distance of outer rim, MmaxFor maximum allowable moment, CwFor the bending stiffness of membranous disc；
δ3=Fnmax/Ca；
Wherein FnmaxFor maximum allowable axial force, CaFor the axis rigidity of membranous disc.
The present invention is applied to a kind of diaphragm coupling, and using fail safe structure above-mentioned, the shaft coupling includes centre
The both ends of axis 6, the jackshaft 6 are symmetrical arranged the fail safe structure.
Working principle of the present invention is as follows:
External splines 21 and internal spline 31 are respectively kept with radial clearance δ1, radial clearance δ2With axial gap δ3；δ1And δ2It can also
It is directly calculated by finite element.By δ1Meaning can be seen that when torque is more than maximum allowable value, external splines 21 and internal spline
31 start to contact on circumferential direction, participate in transmitting torque, and at this moment total torque just has membranous disc to be fixedly connected with spline to undertake.By δ2's
Meaning can be seen that when maximum angular displacement transfinites, and the outer rim of external splines 21 can generate a counter-force resistance with 31 dieback of internal spline
Only angular displacement further increases.δ3For axial gap, value is that long 21 tooth of external splines that subtracts of 31 tooth of internal spline is long, is deformed from membranous disc
From the perspective of δ3=Fnmax/Ca, wherein FnmaxFor maximum allowable axial force, CaFor the axis rigidity of membranous disc.When axial force exceeds
FnmaxWhen, inner sleeve 2 will dieback (δ on the jackshaft 6 of long membranous disc 32< δ4), prevent axial displacement from further increasing.Long membranous disc
3 or short membranous disc 1 in membranous disc portion fractures, the external splines 21 of inner sleeve 2 and the internal spline 31 of long membranous disc 3 will contact, after resuming
Graduating power, and effectively prevent jackshaft 6 and throw away.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, and the those of ordinary skill in field is it is understood that still can be to specific embodiment party of the invention
Formula is modified or replaced equivalently, and without departing from any modification of spirit and scope of the invention or equivalent replacement, it should all
Cover in present claims range.
Claims (3)
1. the fail safe structure on a kind of diaphragm coupling, which is characterized in that the structure includes short membranous disc, inner sleeve and length
Membranous disc, short membranous disc, inner sleeve, long membranous disc are coaxially disposed with the jackshaft of shaft coupling, and the end of short membranous disc and long membranous disc is set respectively
It is equipped with membranous disc portion, is fixedly connected between the membranous disc portion of short membranous disc and the membranous disc portion of long membranous disc, two membranous disc portions are fixedly connected with composition
Membranous disc, the inner wall of short membranous disc are equipped with inner sleeve, and inner sleeve one end extends to inside long membranous disc, and its outer wall is provided with external splines, long
The inner wall of membranous disc is provided with internal spline compatible with external splines, and there are gaps between external splines and internal spline.
2. the fail safe structure on a kind of diaphragm coupling according to claim 1, which is characterized in that the outer flower of definition
Radial clearance between key and internal spline is δ1, the radial clearance between external splines and internal spline is δ2, external splines and internal spline it
Between axial gap be δ3；
δ1=θmax× r=Tmax/CT；
Wherein, wherein θmaxRelative rotation when occurring for peak torque between two membranous discs, r are the radius at spline occlusion, Tmax
For maximum allowable torque value, CTFor the torsion stiffness of membranous disc；
δ2=βmax× Δ l=Mmax/Cw；
Wherein, wherein βmaxFor maximum allowable angular error, when Δ l is that angle error occurs, center of rotation to external splines outer rim
Distance, MmaxFor maximum allowable moment, CwFor the bending stiffness of membranous disc；
δ3=Fnmax/Ca；
Wherein FnmaxFor maximum allowable axial force, CaFor the axis rigidity of membranous disc.
3. the fail safe structure on a kind of diaphragm coupling according to claim 1, which is characterized in that the inner sleeve
Outer wall and short membranous disc inner wall between be interference fitted, the requirement of magnitude of interference is, when transmitting torque by spline after membranous disc is damaged,
Not opposite sliding between short membranous disc and inner sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811623100.4A CN109882520A (en) | 2018-12-28 | 2018-12-28 | A kind of fail safe structure on diaphragm coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811623100.4A CN109882520A (en) | 2018-12-28 | 2018-12-28 | A kind of fail safe structure on diaphragm coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109882520A true CN109882520A (en) | 2019-06-14 |
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ID=66925294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811623100.4A Pending CN109882520A (en) | 2018-12-28 | 2018-12-28 | A kind of fail safe structure on diaphragm coupling |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU616467A1 (en) * | 1976-05-10 | 1978-07-25 | Отраслевое Специализированное Конструкторско-Технолгическое Бюро По Цепным Передачам Сельскохозяйственных Машин | Elastic slip coupling |
| CN203308957U (en) * | 2013-06-04 | 2013-11-27 | 中国航空动力机械研究所 | Membrane disc coupler |
| CN205001403U (en) * | 2015-10-12 | 2016-01-27 | 沧州天硕联轴器有限公司 | High -elastic overload protection shaft coupling |
| CN206036049U (en) * | 2016-08-31 | 2017-03-22 | 沈阳华科技贸有限责任公司 | Vice metal membranous disc flexible coupling mechanism of dual drive |
-
2018
- 2018-12-28 CN CN201811623100.4A patent/CN109882520A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU616467A1 (en) * | 1976-05-10 | 1978-07-25 | Отраслевое Специализированное Конструкторско-Технолгическое Бюро По Цепным Передачам Сельскохозяйственных Машин | Elastic slip coupling |
| CN203308957U (en) * | 2013-06-04 | 2013-11-27 | 中国航空动力机械研究所 | Membrane disc coupler |
| CN205001403U (en) * | 2015-10-12 | 2016-01-27 | 沧州天硕联轴器有限公司 | High -elastic overload protection shaft coupling |
| CN206036049U (en) * | 2016-08-31 | 2017-03-22 | 沈阳华科技贸有限责任公司 | Vice metal membranous disc flexible coupling mechanism of dual drive |
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Application publication date: 20190614 |