CN109883681A - The soft or hard double structure overspeed test safety collar of steel - Google Patents
The soft or hard double structure overspeed test safety collar of steel Download PDFInfo
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- CN109883681A CN109883681A CN201910246627.8A CN201910246627A CN109883681A CN 109883681 A CN109883681 A CN 109883681A CN 201910246627 A CN201910246627 A CN 201910246627A CN 109883681 A CN109883681 A CN 109883681A
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- retaining ring
- hard
- rotor
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- steel
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Abstract
The present invention provides a kind of soft or hard double structure overspeed test safety collars of steel, it is made of internal layer cushion course (4) and the hard retaining ring of outer layer (5), internal layer cushion course is formed in short transverse by 3-5 sections, six segmental arcs are divided into circumferencial direction, it is formed by stacking in thickness direction by 6-10 layers of multi-layer thin steel plate, the hard retaining ring of outer layer is welded by the curling of 1-2 thickness steel plate, and short transverse is single type.Two flanges up and down are welded on the inside of the hard retaining ring of outer layer, the embedding block of cushion course segmental arc is therebetween.There are radial clearances between outer layer retaining ring and cabin, and retaining ring is allowed to be deformed and move when containing rotor or rotor fragment.It is not fixed, can move freely between retaining ring and the bilge.The present invention has fully considered the safety requirements under overspeed test environment, for containing rotor when rotor burst or accident fall off, absorbs rotor kinetic energy, protects equipment and personnel safety.
Description
Technical field
The present invention relates to rotation overspeed test fields, specifically, being a kind of soft or hard double structure overspeed test safety of steel
Ring, main function is during the test, when accident occurs for high-speed rotating rotor, contains the huge kinetic energy of rotor, with
Guarantee the safety of equipment and personnel.
Background technique
The function of overspeed test bench configuration safety collar is during the test, when accident occurs for high-speed rotating rotor
When, contain the huge kinetic energy of rotor, to guarantee the safety of equipment and personnel.Mainly for two kinds of most dangerous situations:
1, rotor burst.Different according to the specific structure of rotor, rotor has different explosion forms, wherein four-piece type rotor burst
It is most dangerous, because the rotation function of rotor is largely converted to the translational kinetic energy of fragment, there is maximum penetrate to safety collar
Ability.For such situation, safety collar will design calculating by containing ability is penetrated.The main theoretical basis of the reform of Chinese economic structure of calculating is Haag/
The energy method that Sanky is proposed；
2, rotor falls off.Whole kinetic energy all still exist in a manner of rotation function after rotor falls off, and rotation function pacifies on-fixed
The safety collar of dress does not have damage capability, but to be changed into translation dynamic for part rotation function during with safety collar rotary collision
Can, rotor does plane motion in cabin.With the increase of collision frequency, the ratio for being changed into translational kinetic energy is also bigger, due to
Rotor hits safety collar with the translational kinetic energy that it integrally has, and the containing ability of safety collar is no longer just penetration ability, but
Impact resistant ability.The design of safety collar will be such that kinetic energy as much as possible consumes in a rotating manner, be changed into the dynamic of translation
It can be contained completely by safety collar, and be unlikely to be transmitted on vacuum bulkhead and ground, to protect machine and surrounding people and facility
Safety.
Safety collar should also have some design features preferably to meet use in addition to meeting above-mentioned main security and containing function
The test mission demand and protection equipment itself function at family, mainly there is aspects several in this way:
1, the lighter the secondary destruction occurred when rotor burst fragment shock safety collar the better, to keep initial explosion fracture shape
Looks, convenient for further analysis Decrepitation Phenomena；
2, the lighter rebound after rotor flakes hit safety collar the better, reduces set in rebound fragment shock hatchcover or other cabins as far as possible
Danger caused by applying or loss；
3, safety collar has clearly foundation after containing destruction, judges whether to be replaced, replacement cost is cheap as far as possible.
There are mainly two types of structure types for the safety collar that current device producer provides, and one is steel thickness to contain in ring leading brick
Lining, another kind is multilayer steel ring structure.Both forms all have some disadvantages, and mainly have:
1, the shortcomings that thick steel loop leading brick lining structure:
1) lead is a heavy metal species, is harmful to the human body, Ying Jinliang avoid using, after especially each rotor burst, damage lead brick
Founding again is needed, unavoidably and human contact；
2) rotor fragment can penetrate lead brick and hit thick steel loop and still has secondary destruction after rotor burst, and fragment can be mingled in lead brick,
Easily collecting is not complete；
2, the shortcomings that composite steel ring structure:
1) steel loop bending stiffness is too big, and the fragment secondary damage for the rotor that not only bursts is serious, but also fragment rebound direction changes, and holds
The weak part for easily injuring cabin, such as facility in the bilge and hatchcover and other cabins；
2) rotor burst will injure multilayer steel loop, it is difficult to clearly judged whether to need replacing new safety collar according to damaged condition,
And the several layers of steel loops of replacement, it causes or safety collar impaired operation, reduction safety assurance or replacement cost is too high；
3) single-piece steel loop weight is larger, and testpieces need to be equipped with larger specification crane for replacing steel loop, and investment cost is high；
4) gap is too small between outermost layer steel loop and vacuum bulkhead, is actually unable in and is considered as effectively containing ring, because of once quilt
Impact force will be transmitted on bulkhead on ground by collision deformation, cause seriously to damage to machine；
5) it falls off this accident to rotor, it cannot effectively consume rotation function, cause to be converted to the ratio of translational kinetic energy too
Height, containment properties are poor, and test risk increases.
Summary of the invention
In order to overcome the shortage of prior art, the present invention proposes a kind of soft or hard double structure overspeed test bench safety collar of steel,
Main feature is as follows:
1, a whole set of safety collar is made of Low rigidity internal layer cushion course and the hard retaining ring of high-rigidity/high-strength outer layer.Internal layer cushion course is by one
Group sheet metal (thickness depends on machine specifications size less than 10 millimeters) roll bending is made；The hard retaining ring of outer layer is by single-layer or multi-layer thickness
Steel plate (thickness is related with machine specifications size greater than 40 millimeters) roll bending welding is made；
2, design gaps between the hard retaining ring of outermost layer and vacuum bulkhead, width are greater than the thickness of steel plate；Using small between hard ring
Gap (less than 15 millimeters) design；
3, internal layer cushion course is divided into multistage (related to machine specifications size, 3-5 sections settable) in the height direction, in circumference
Six segmental arcs are divided on direction；
4, two sections are welded with flange on the inside of hard retaining ring, and the embedding block of internal layer cushion course segmental arc is therebetween.
The technical characteristic of new type of safe ring is exactly to separately design entire safety collar for the inner ring characterized by soft and with strong
The double-layer structure for the outer ring being characterized, to realize best buffering and contain function.
Contain the containing that capacity calculation is theoretical, for the rotor fragment that bursts, packet according to the energy method that Haag and Sanky is proposed
The face region only hit by fragment on Rong Huan and contiguous zone absorb energy and participate in containing, and the width of contiguous zone is proportional to
Contain the thickness of ring, so the containing ability of monocycle is greater than the equal polycyclic containing ability of overall thickness.Therefore in the design,
Internal layer cushion course is made of multi-layer thin steel plate, is easy breakdown interaction force when main function is reduction collision, is avoided broken
Piece rebound, and the thick ring of outer layer plays containment role, and maximum containing ability is realized in limited radial space.
It since internal layer cushion course is easy breakdown, must just be replaced after breakdown, criterion is simply clear, is unlikely to because damaging journey
Degree difference is difficult to judge whether that this is changed, and avoids the retaining ring for reducing containing ability because of damage still in the unsafe condition used.
Due to usually breakdown area very little, internal layer cushion course is designed to that on height and circumferencial direction be more
Segment structure, each burst test only needs to change a few breakdown segmental arc, to reduce cost.
For the accident that rotor integrally falls off, initial high-speed rotating rotor can be contacted with internal layer cushion course, such as milling cutter
Bed course is equally cut, cutting force will push inner ring rotary motion and gradually accelerate, and it is fixed that rotary collision process follows conservation of angular momentum
The moment of momentum is passed to the course under internal layer bed course and cutting by rule, rotor, and the revolving speed of itself reduces, while tangential force can push away
Turn is translatable forward, and patch inner ring revolution as feed, is gradually cut forward.Since bed course is by multiple arcs section group
At the rotary inertia very little of each segmental arc is easy to be rotated and accelerated by pushing, thus significantly reduces the strong of rotary collision
Degree, so that rotary collision process is continued, to more rotation functions be consumed, with continuing for rotary collision, no
Occurs radial force avoidablely, so that the revolution for being close to inner ring becomes polygonal motion track, in radial impact, due to inner ring
Segmental arc quality is smaller, is easy to be hit and generate radial displacement, to reduce collision earthquake intensity, every time collision have some kinetic energy with
The mode of rotation consumes (cutting and inner ring rotation), and the part for being finally translated into translational kinetic energy is smaller, after colliding with memory ring
It bumps against big quality outer ring and is blocked containing.
Inner ring is done with the general structural steel of low cost, that is, can avoid lead contamination, experimentation cost can also be reduced.
Detailed description of the invention
Fig. 1 is the schematic diagram that the soft or hard double structure overspeed test safety collar of steel of the present invention is used for overspeed test；
(1) it is flexible drive shaft, hangs and drive test rotor (2), formed by (3) hatchcover, (6) cabin and (7) bilge
Rotation test is carried out in vacuum chamber, is placed in cabin by (4) internal layer cushion course and the hard retaining ring of (5) outer layer, i.e., steel of the present invention is soft
Hard double structure overspeed test safety collar absorbs rotor kinetic energy, protection is set for containing rotor when rotor burst or accident fall off
Standby and personnel safety.
Specific embodiment
Basic ideas of the invention are as follows: by entire overspeed test safety collar separately design for characterized by soft inner cushion layer and
Outer retaining ring dual structure characterized by by force, to realize best buffering and contain function.
Internal layer cushion course (4) is formed by 3-5 sections in the height direction, six segmental arcs is divided into circumferencial direction, in thickness
Degree is formed by stacking on direction by 6-10 layers of multi-layer thin steel plate；The hard retaining ring of outer layer (5) is welded by the curling of 1-2 thickness steel plate,
Short transverse is single type.Flange is welded on the inside of the hard retaining ring of internal layer, the embedding block of internal layer cushion course is therebetween.The hard retaining ring of outer layer (5) and
There are radial clearances between cabin (6), and retaining ring is allowed to be deformed and move when containing rotor or rotor fragment.Inside and outside retaining ring
It is not fixed, can move freely between the bilge (7).
A whole set of safety collar is made of Low rigidity internal layer cushion course and the hard retaining ring of high-rigidity/high-strength outer layer.Internal layer cushion course
(4) it is formed by stacking by one group of sheet metal (thickness depends on machine specifications size less than 10 millimeters)；The hard retaining ring of outer layer (5) is by list
Layer or multilayer thick steel plate (thickness is related with machine specifications size greater than 40 millimeters) roll bending welding are made.Ectonexine retaining ring is adopted
With this low cost of mild steel, the material of high-elongation and good welds.
Design has radial clearance between the hard retaining ring of outermost layer (5) and vacuum cabin (6) bulkhead, and width is greater than the thickness of steel plate
Degree；It is designed between the hard retaining ring of multilayer using small―gap suture (less than 15 millimeters).
Internal layer cushion course (4) is divided into multistage (related to machine specifications size, 3-5 sections settable) in the height direction,
Circumferencial direction is divided into six segmental arcs.All embedding blocks of segmental arc are between two flanges up and down of the hard ring of internal layer.
Claims (4)
1. a kind of soft or hard double structure overspeed test safety collar of steel, it is characterised in that including internal layer steel cushion course (4) and outer layer
The hard retaining ring of steel (5), internal layer cushion course are formed by 3-5 sections in the height direction, divide six segmental arcs in a circumferential direction, in thickness
It spends to be crimped on direction by 6-10 layers of multi-layer thin steel plate and integrate, the hard retaining ring of outer layer is welded by the curling of 1-2 thickness steel plate, height
Direction is single type；The hard retaining ring of outer layer weld flange up and down, between the embedding block of cushion course segmental arc；The hard retaining ring of outer layer and cabin it
Between there are radial clearance, allow retaining ring to be deformed and move when containing rotor or rotor fragment；Between retaining ring and the bilge not
It is fixed, it can move freely.
2. the soft or hard double structure overspeed test safety collar of a kind of steel according to claim 1, which is characterized in that a whole set of safety
Ring is made of Low rigidity internal layer cushion course and the hard retaining ring of high-rigidity/high-strength outer layer；Internal layer cushion course is by one group of sheet metal (thickness
Less than 10 millimeters, machine specifications size is depended on) it crimps fastening and is cut into segmental arc and is made；The hard retaining ring of outer layer by single layer or
Multilayer thick steel plate (thickness is related with machine specifications size greater than 40 millimeters) roll bending welding is made.
3. the soft or hard double structure overspeed test safety collar of a kind of steel according to claim 1 or 2, which is characterized in that outermost
Radial clearance is designed between the hard retaining ring of layer and vacuum bulkhead, width is greater than the thickness of steel plate.
4. the soft or hard double structure overspeed test safety collar of a kind of steel according to claim 1 or 2, which is characterized in that internal layer
Cushion course is folded to fall together in the height direction by multistage composition (related to machine specifications size, 3-5 sections settable), and each section
Between be not fixed connection；Six segmental arcs are divided into circumferencial direction, are also not fixed between segmental arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910246627.8A CN109883681B (en) | 2019-03-29 | 2019-03-29 | Steel soft and hard double-structure overspeed test safety ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910246627.8A CN109883681B (en) | 2019-03-29 | 2019-03-29 | Steel soft and hard double-structure overspeed test safety ring |
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| Publication Number | Publication Date |
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| CN109883681A true CN109883681A (en) | 2019-06-14 |
| CN109883681B CN109883681B (en) | 2020-06-30 |
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| CN109883681B (en) | 2020-06-30 |
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