CN100470223C - High-speed acceleration apparatus - Google Patents
High-speed acceleration apparatus Download PDFInfo
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- CN100470223C CN100470223C CNB2006101146010A CN200610114601A CN100470223C CN 100470223 C CN100470223 C CN 100470223C CN B2006101146010 A CNB2006101146010 A CN B2006101146010A CN 200610114601 A CN200610114601 A CN 200610114601A CN 100470223 C CN100470223 C CN 100470223C
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- reel
- high speed
- rope
- taper
- test specimen
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Abstract
The invention relates to a high speed hasten device, which is a hasten device to accelerate the object to the high speed status in the high speed impact experimentation. It uses the electric energy of the common use electromotor to replace rocket or high pressure gas in the traditional method; in the meantime bobbin with special design keeping the object invariable acceleration in the accelerate process, consequently, keeping cord and bracket equipment endure the equal stress, eliminating the impact function; the harmony work of the whole device can guarantee the equal accelerate experimental effect with the traditional method. Compared with the existing technology, its advantages are that it is simple in structure and easy to implement, low cost, safety and reliability, while the low price of experiment, can save a lot of energy consumption, and can be more controllable and stable acceleration, reduces the restrictions of the corresponding performance requirements, making more extensive equipment selection. In short, this device has high controllable, fully meet the requirements of impact test, and save a lot of manpower, material and financial resources.
Description
Technical field
The present invention relates to a kind of accelerator that in the high speed impact test, object is accelerated to fast state, belong to aeronautical engineering and correlative technology field thereof.
Background technology
In a lot of applications, all need to study motion and the impact characteristics of object under high-speed motion.For example in aircraft industry, the research high speed impact has crucial meaning.Aircraft and flying bird are bumped against the incident that causes aircraft damage or fatal crass aloft, and be of common occurrence at home and abroad.According to analysis of statistical data, generally about 150m/s, only several milliseconds of duration, so study high speed impact to aircraft windscreen performance study, engine blade intensive analysis design is significant for bird collisions speed.In recent years, flight recorder (FDR, custom one-tenth " black box ") effect is obvious day by day, not only in moment that grasp is broken down and in advance on the flight situation of a period of time aircraft, working condition such as equipment and member all must have FDR, and along with new technology application aboard such as Flight By Wire and integrated flight display systems, FDR is in crash analysis and provide reference data as the test flight training quality in actual applications, for setting up the flight archives, realize the unit status monitoring, the effect of determining unit life-span aspect is more outstanding, and therefore FDR has been listed in the airborne equipment that must adorn abroad.Also the unit of being used and airplane design unit pay attention to just gradually at China FDR.And FDR is in design process, and impact test is a most critical and a most difficult test in the test of FDR crashworthiness.According to existing European Civil Aviation electrotechnics can the requirement of minimum serviceability standard (MOPR) of flight data recorder, impact acceleration will reach 3400g, 6.5 milliseconds of action times, it is quite high to the test unit requirement therefore to finish this test.For reaching above-mentioned standard, how as seen FDR must adopt simple effective, reliable acceleration equipment with the speed motion of 138.6m/s, object accelerated to fast state, and then study its performance, has a very important role in aeronautical engineering and association area.
In order in the high speed impact test object to be accelerated to very high speed, at present, accelerator commonly used generally adopts warbird car or air bubble.
The warbird car is a kind of rocket assist of utilizing, make triers such as vehicle, aircraft reach the purpose of high-speed motion in orbit, under the aircraft high-speed case, launch performance as needs simulations ejector seat, just must accelerate to very high flying speed to aircraft, this method needs a large amount of fuel consumption and setting up expenses, and application is very limited.Air bubble is the accelerator of another kind of equipment complexity, and it mainly is an impulsive force of utilizing pressure gas, and the object in gun tube accelerates to higher speed at short notice.For example: Fig. 1 is exactly a kind of pressurized air big gun, is about 50 feet, and by gas tank, gun tube and auxiliary device are formed.Gas tank earlier is inflated to preset air pressure by air compressor during test, snap-out release air-flow then, and air-flow is released test specimen along gun tube and is made its high-speed motion.This device structure is very complicated, and operation controllability is relatively poor.
Although above-mentioned two kinds of devices can reach testing requirements, Design of device complexity, testing expenses are high, and dangerous big, common laboratory does not possess this condition.At this situation, this patent has designed a kind of simple in structure, cheap device, can satisfy the impulse test requirement fully.Adopt this device to experimentize, simple, can reach the accelerated tests effect identical with classic method, compare classic method and can save great amount of manpower and material resources and financial resource.In a word, this device simple possible, controllability is good, and up to the present, in high speed acceleration field, we also do not see similar accelerator or technology.
Summary of the invention
The purpose of this invention is to provide a kind of easy high speed accelerator, it is simple in structure that it is had, cheap, the test characteristics that cost is little and controllability is high.
A kind of high speed accelerator is characterized in that: this device contains motor, rotor, rope and test specimen bracing or strutting arrangement; Described rotor is made up of the rotating shaft that is fixed together, flying wheel and taper reel, the two ends of described rotating shaft are installed on the bearing spider respectively, be provided with electromagnetic clutch at the small end of taper reel and the bound fraction of rotating shaft, between motor and rotating shaft, be provided with buncher; Described test specimen bracing or strutting arrangement is by slide rail, constitute along the carriage of slide rail moving linearly and the hook that is fixed on this carriage; One end of described rope is fixed on the electromagnetic clutch, the other end and hook cover connection; When the linear acceleration a of taper reel did not change in time, described taper reel should satisfy following relationship at the t radius that winds the line constantly:
r
θ＝Bωt+r
0＝Bθ+r
0
Wherein, r
0Be reel small end radius, B is a constant, and ω is the angular velocity of reel, and θ is θ for the angle that turns at t moment reel.
Technical characterictic of the present invention also is: described slide rail is positioned at the top of reel, and described hook adopts the broken line structure, and two broken line angles are between 70 °～80 °.
In the technique scheme, the radius of described flying wheel is 1/3～1/2 of the big end radius of reel.The material of rope of the present invention adopts aramid fiber-29.
Technical characterictic of the present invention also is: this high speed accelerator also comprises the safeguard that is arranged on test specimen motion the place ahead.
The present invention compared with prior art has the following advantages and the high-lighting effect: this device utilizes the electric energy of motor commonly used, has replaced rocket or the gases at high pressure boosting in the classic method, it is simple to draw materials, be easy to realize, safe and reliable, and the consumption of having saved a large amount of test energy.By the reel of particular design, feasible acceleration to object has more controllability, can realize the acceleration of arbitrary speed in a bigger scope; Simultaneously the reel of particular design makes object in the process of quickening, and rope and carrier machine stressed more even eliminated percussive action, reduced the restriction to the relevant device performance requirement, makes that choosing of equipment is more extensive.
In a word, high speed accelerator provided by the invention has simple in structure, cheap, and the test cost is little, and the characteristics that controllability is high can satisfy the requirement of impulse test fully, compare conventional apparatus and can save great amount of manpower and material resources and financial resource.
Description of drawings
The test unit synoptic diagram that Fig. 1 quickens for available technology adopting pressurized air big gun.
Fig. 2 is the general structure synoptic diagram (vertical view) of high speed accelerator provided by the invention.
Fig. 3 synoptic diagram that to be accelerator be connected by rope with the test specimen bracing or strutting arrangement.
Fig. 4 is the structural representation of rotor.
Fig. 5 is the winding mode synoptic diagram of reel and rope.
Fig. 6 is the left view of Fig. 5.
Fig. 7 is the structure of hook and the annexation synoptic diagram of hook and rope.
Among the figure: 1-safeguard; 2-bearing spider; 3-electromagnetic clutch; 4-reel; 5-flying wheel; 6-rotating shaft; 7-buncher; 8-motor; 9-rope; 10-slide rail; 11-hook; 12-carriage.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention, structure and preferred forms are further described.
Fig. 2 is the general structure synoptic diagram of high speed accelerator provided by the invention.This device contains motor 8, rotor, rope 9 and test specimen bracing or strutting arrangement; Described rotor is made up of the rotating shaft 6 that is fixed together, flying wheel 5 and taper reel 4, the two ends of rotating shaft 6 are installed on the bearing spider 2, be provided with electromagnetic clutch 3 at the small end of taper reel and the bound fraction of rotating shaft, between motor 8 and rotating shaft 6, be provided with buncher 7; Described test specimen bracing or strutting arrangement by slide rail 10, can be in the slide rail upper edge straight-line carriage 12 and the hook 11 that is fixed on this carriage constitute; One end of described rope 9 is fixed on the electromagnetic clutch 3, the other end and hook 11 cover connection.
The power that this device adopts flying wheel 5 to quicken as test, under the traction of rope, the test specimen that slides along guide rail is accelerated to about 150 meter per seconds by 0, its principle of work is as follows: motor 8 is the buncher 7 by being attached thereto at first, electric energy is passed to flying wheel 5, energy stores on flying wheel, when the reel 4 that is attached thereto reaches desired rotating speed, closure function by electromagnetic clutch 3, rope 9 beginnings are twined on reel, rope coupling hook 11, therefore drive carriage 12 with and on the test specimen setting in motion, accelerator is connected as shown in Figure 3 by rope with the test specimen bracing or strutting arrangement.When test specimen accelerates to predetermined speed, test specimen separates with rope, and travels forward at a predetermined velocity.A whole set of accelerator is fixed on the bearing spider, to reach the stable purpose of quickening.
The design proposal of reel: the effect of reel 4 is to twine rope, travels forward so that carriage is carrying test specimen.Excessive in order to prevent test specimen starting transient acceleration, the radius of reel must increase gradually, as shown in Figure 5.At its small end an electromagnetic clutch 3 is installed, is used for rope 9 is linked to each other with reel 4.Impacted and cause damaging for fear of reel, flying wheel, bearing, rope etc., just require in whole accelerator, regardless of the velocity magnitude of test specimen, it is constant that linear acceleration keeps substantially.
If rope is connected the starting point that be the time that time with reel, the angular velocity of reel is ω, and the angle that turns at t moment reel is θ, and the linear velocity at rope and place, reel point of contact is v, and linear acceleration is a, and the radius at place, point of contact is r
θIn order to simplify calculating, suppose that the angular velocity of reel in whole process is constant substantially, following relationship is then arranged:
r
θ＝Aθ
2+Bθ+r
0＝Aω
2t
2+Bωt+r
0
v＝Aω
3t
2+Bω
2t+ωr
0
a＝2Aω
3t+Bω
2
If linear acceleration a is not changed in time, then must A=0.Therefore the taper reel is in the t radius r that winds the line constantly
θWith the pass of the angle θ that turns over be:
r
θ＝Bωt+r
0＝Bθ+r
0
Wherein, r
0Be reel small end radius, the radius at place, point of contact when promptly rope begins to twine; B is a constant, determines by the peak acceleration that rope pulling carriage can bear, so when B determines, r
θJust be determined, that is to say, the drift angle of reel has just been determined, so the cone structure of reel must satisfy this coiling rule.
When, radius higher when rotating speed was big, the reel wheel rim may break because of centrifugal force is excessive.Rotating speed according to motor 2930r/s commonly used at present, reach the linear velocity of 150m/s, reel need be selected the material reel that density is little, intensity is big, can adopt the S glass fibre, after anhydrous fiber size for reinforcemeent (HTS) processing, its pulling strengrth reaches 4900Mpa, is more than 4 times of high-quality steel.Can meet the demands by the fiberglass of making after the S glass fibre HTS processing.
The design proposal of flying wheel: the effect of flying wheel is a storage power, and its kinetic energy is converted to the kinetic energy of test specimen, so wishes that its moment of inertia is big, so that just test specimen can be accelerated to predetermined speed under its rotating speed descends little situation.Because rotating speed is higher, radius can not be too big, generally should be 1/3～1/2 of the big end radius of reel, so want the material that selection intensity is big, density is big.
The design of carriage: carriage is used to lay test specimen and realizes being connected of rope and carriage, and requires its air resistance when high-speed motion less.One of them key is the design of hook, must guarantee that rope links to each other with carriage in accelerator, and rope will break away from carriage after acceleration is finished, and Fig. 7 is the embodiment of hook provided by the invention.Because slide rail is positioned at the top (Fig. 3) of reel, therefore hook being designed to an end links to each other with carriage, the broken line structure that one end is downward, when carriage and reel distance was far away, the pulling force basic horizontal was forward, rope on the hook can not come off with hook, when carriage travels forward gradually, behind reel, owing to there is the effect of downward power, rope then breaks away from hook, no longer draws carriage and travels forward.The test specimen fastening is positioned at the acceleration equipment top, is made of two slide rails, carriage and hooks.Article two, slide rail is parallel to each other, and level is installed; Be the carriage of placing test specimen on the slide rail, carriage can move along a straight line on slide rail; Hook is a kind of broken line structure, and an end and carriage are connected, and the other end and rope interlock, and two broken line angles are between 70 °～80 °, and rope can be from not linking up with landing when guaranteeing beginning, and when test specimen reaches required speed, can come off from hook smoothly.
Accelerate to V at test specimen from 0
0Process in, must impact to bearing and rope, consequent shock load has proposed very high requirement to rope, particularly in moment that rope is connected with reel.Therefore should meet the following requirements the rope that connects carriage and reel.Rope tensile strength is bigger, and density is little.Because the rope of this test is longer, have only intensity big, could reduce the diameter of rope, make it reduce quality, and density little also be in order to reduce the quality of rope, to reduce the idle work of system.According to above some requirement, particularly requirement of strength, up to tens kilograms, have a strong impact on the steady operation of flying wheel with common cable wire quality, and a big chunk energy of output is used for flogging a dead horse.Reel after twining for rope in addition can cause the quality redistribution, is unfavorable for the mobile equilibrium of flying wheel.This device adopts aramid fiber-29 as rope, through checking, can meet the demands.
For slide rail, its major function is the constraint carriage, and gives initial motion direction of test specimen.Requirement to slide rail is that rigidity will be got well, and friction factor is little.
For motor, it is used to drive the flying wheel rotation, is connected with buncher in the middle of them.Because the acceleration of flying wheel can be finished in a long time, so the power of motor do not require very greatly, and the high-efficient three-phase asynchronous motor of similar YX132S1-2 gets final product.
For clutch coupling, this device can adopt electromagnetic clutch, is characterized in that the torque range of control is big, is swift in motion (can near several milliseconds), and running steadily.The part magnetic blow out coating skids during overload, plays overload protective function.Good endurance, and be convenient to remote operation.
On equipment of testing the speed and protective device, the equipment that tests the speed is measured the rotating speed of reel on the one hand, and the movement velocity of test specimen is measured in order on the one hand, can select ripe product for use.If the speed with up to 150m/s of one 5 kilograms test specimen is moved, if it meets accident, its destruction is very big.Therefore, must carry out the design of protective device to whole experiment device.For preventing that test specimen from flying out from the dead ahead, should be on safe dam of design, the rear at test specimen bump place.The another one protective device is that a housing protective cover should be made in the outside of flying wheel, flies out when preventing the rope fracture.
Claims (5)
1, a kind of high speed accelerator is characterized in that: this device contains motor (8), rotor, rope (9) and test specimen bracing or strutting arrangement; Described rotor is made up of the rotating shaft that is fixed together (6), flying wheel (5) and taper reel (4); The two ends of rotating shaft (6) are installed on the bearing spider (2), are provided with electromagnetic clutch (3) at the small end of taper reel and the bound fraction of rotating shaft, are provided with buncher (7) between motor and rotating shaft; Described test specimen bracing or strutting arrangement by slide rail, can constitute at straight-line carriage in slide rail upper edge and the hook that is fixed on this carriage; One end of described rope is fixed on the electromagnetic clutch, the other end and hook cover connection; When the linear acceleration a of taper reel did not change in time, described taper reel should satisfy following relationship at the t radius that winds the line constantly:
r
θ＝Bωt+r
0＝Bθ+r
0
Wherein, r
0Be taper reel small end radius, B is a constant, and ω is the angular velocity of taper reel, the angle of θ for turning at t taper constantly reel.
2, according to the described high speed accelerator of claim 1, it is characterized in that: described slide rail is positioned at the top of taper reel, and described hook adopts the broken line structure, and two broken line angles are between 70 °-80 °.
3, according to claim 1 or 2 described a kind of high speed accelerators, it is characterized in that: the radius of described flying wheel is 1/3～1/2 of the big end radius of taper reel.
4, according to the described high speed accelerator of claim 1, it is characterized in that: described taper reel material is selected the S glass fibre through anhydrous fiber size for reinforcemeent processing.
5, according to the described high speed accelerator of claim 1, it is characterized in that: this high speed accelerator also comprises the safeguard (1) that is arranged on test specimen motion the place ahead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101146010A CN100470223C (en) | 2006-11-17 | 2006-11-17 | High-speed acceleration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101146010A CN100470223C (en) | 2006-11-17 | 2006-11-17 | High-speed acceleration apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101025381A CN101025381A (en) | 2007-08-29 |
| CN100470223C true CN100470223C (en) | 2009-03-18 |
Family
ID=38743873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101146010A Expired - Fee Related CN100470223C (en) | 2006-11-17 | 2006-11-17 | High-speed acceleration apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100470223C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048151A (en) * | 2012-11-29 | 2013-04-17 | 中北大学 | Aircraft large overload loading environmental simulation testing system |
| CN103048152A (en) * | 2012-11-29 | 2013-04-17 | 中北大学 | Momentarily-started launch flight two-dimensional overload environment simulation test system |
| KR20190123762A (en) * | 2017-02-28 | 2019-11-01 | 고쿠사이 게이소쿠키 가부시키가이샤 | Collision Simulation Device and Impact Test Device |
| CN109268329B (en) * | 2018-10-22 | 2021-08-17 | 清华大学 | Mixing valve for soft robot |
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2006
- 2006-11-17 CN CNB2006101146010A patent/CN100470223C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101025381A (en) | 2007-08-29 |
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Granted publication date: 20090318 Termination date: 20101117 |