CN105840722A - Shock isolator used for precision equipment and simulation method thereof - Google Patents
Shock isolator used for precision equipment and simulation method thereof Download PDFInfo
- Publication number
- CN105840722A CN105840722A CN201610164300.2A CN201610164300A CN105840722A CN 105840722 A CN105840722 A CN 105840722A CN 201610164300 A CN201610164300 A CN 201610164300A CN 105840722 A CN105840722 A CN 105840722A
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- China
- Prior art keywords
- guide rail
- hole
- inner sleeve
- spring
- isolator
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- 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.)
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
- F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
Abstract
The invention provides a shock isolator used for precision equipment. The shock isolator comprises an outer sleeve, an inner sleeve, a spring, a pushing plate, a sliding pin and a guide rail. The shock isolator used for the precision equipment aims at meeting the shock isolation requirements of the existing ship equipment of which the requirement for the position precision is very high and achieving the shock-resistant purpose of the equipment.
Description
Technical field: the invention belongs to impact isolating technical field, relates to a kind of shock resistance isolator, particularly to one
Shock resistance isolator and emulation mode for precision equipment.
Background technology: naval vessel is inevitably attacked by all kinds of weapon such as submarine mine, torpedo in operation, thus produces
Although the raw Explosive Shock Loading of noncontact under water will not directly contribute the destruction of warship structure, but warship equipment can be caused to send out
Raw extensive damage, and then cause naval vessel to lose fighting capacity and vitality.For improving the impact resistance of warship equipment, develop
Go out the multiple elastic shock resistance isolator installed such as gasbag-type, rubber type, steel wire rope, rely on the big displacement deformation energy of its elastomer
Power, the major part such as electromotor, gas turbine has obtained effective surge guard to the equipment that required precision is the highest.But on naval vessels
There is the measurement such as compass, fire control radar, detecting devices, it is the highest to position accuracy demand simultaneously, even if the least disturbance is also
Cisco unity malfunction in the one section time can be caused.For the shock resistance isolator of this kind equipment, need the holding equipment can
Install with warship body approximation rigidity, for realizing this function, a certain amount of prefastening load can be set inside isolator so that it is can
The extraneous less disturbance of opposing, and when shock loading is more than prefastening load, relies on the deformation of internal elastomeric to reduce and be transferred to
The shock loading of equipment.Therefore, it is necessary to invent a kind of shock isolator with prefastening load in naval vessel to position essence
Degree requires the highest equipment.
Summary of the invention:
Goal of the invention: the present invention provides a kind of precision equipment shock isolator and emulation mode thereof, its objective is to solve
The most existing problem.
Technical scheme: the present invention is achieved by the following technical solutions.
A kind of precision equipment shock isolator, it is characterised in that: equipment outer sleeve, inner sleeve, spring, push pedal, sliding pin
And guide rail；
Guide rail includes main guide rail, the shaft shoulder and base；
Outer sleeve includes upper cavity and lower chamber, the partition wall between upper cavity and lower chamber is provided with and wears for main guide rail
The guide rail hole crossed and main guide rail constitute sliding pair, are provided with the pin hole for installing sliding pin on the outer wall of lower chamber bottom；
Inner sleeve includes guide rail hole, chute and inner chamber body, the guide rail hole passed for main guide rail be positioned at inner sleeve top and
Main guide rail constitutes sliding pair；
Outer sleeve, inner sleeve, spring and push pedal are all set on the main guide rail of guide rail, and inner sleeve is set under outer sleeve
Inside cavity；The guide rail hole of inner sleeve overlaps with the guide rail hole of outer sleeve, and main guide rail is through inner sleeve, inner sleeve guide rail hole and outer
In upper end puts in the upper cavity of outer sleeve after sleeve guide rail hole, in upper cavity, it is provided with the upper end with main guide rail is connected linkage
Spacing ring；
Spring is arranged in inner sleeve and is enclosed within main guide rail, and push pedal is positioned at the lower end of spring, outside sliding pin one end is fixed on
On the pin hole that sleeve is corresponding, the other end through inner sleeve chute after be close to push pedal downside install.
The equipment mounting seat needing to carry out the precision equipment of impact isolating for installation it is provided with on the top of sleeve.
Being provided with bottom end cover in the lower end of inner sleeve, bottom end cover is positioned at the lower end of sliding pin.
Sliding pin is can be with outer sleeve along the structure of the slide of inner sleeve.
Movable sealing between main guide rail and outer sleeve guide rail hole and inner sleeve guide rail hole.
It is filled with damping fluid in upper cavity, spacing ring is provided with damping hole and for being arranged on the peace of main guide rail upper end
Dress hole.
The circumference of spacing ring it is distributed in for exchanging the damping hole of damping fluid；Mounting hole site, in the middle part of spacing ring, is used
In assembling with guide rail.
Chute is distributed on the wall of inner sleeve bottom, additionally, pin hole is corresponding with the position of chute, pin hole, sliding pin with
The quantity of chute is consistent.
The axial length of the upper cavity of outer sleeve is consistent with the maximum relative displacement needing the equipment carrying out isolating to be allowed.
The method that the isolator model emulation utilizing above-mentioned precision equipment shock isolator to be implemented is analyzed, its feature
It is:
Realize step as follows:
Step (1): set up in Ansys software the spring unit and being used for for analog isolation device simulate needs impact every
From the mass unit of equipment, one end B of spring unit is connected with mass unit, and the other end A of spring unit is used for applying impact
Load；
Step (2): power-deflection characteristic curve parameter is given spring unit, and give spring unit and damp accordingly
Parameter, encloses qualitative attribute to mass unit simultaneously；
Step (3): to arrange analysis type be transient state to the module that solves in Ansys software, and inside solves integral algorithm and is
Newmark time integration method；
Step (4): apply shock loading at spring A end and carry out simulation calculation, shock loading be sinusoidal unicast or sine just
Negative double wave, triangular wave unicast or positive and negative combined triangular ripple or the vibration signal of loop cycle；
Step (5): after having calculated, the time post-processing module at Ansys carries out checking of simulation result；It it is quality list
Acceleration responsive, relative displacement response or the speed responsive of unit；Wherein: the displacement d of the displacement D of load(ing) point A, mass unit B point,
The difference between the two Δ d=| D-d |, Δ d are the practical distortion amount of isolator, are also that simulator is relative in impact process simultaneously
The position range of pedestal.
Advantage and effect: the present invention provides a kind of precision equipment shock isolator and emulation mode thereof, and it is mainly pin
To equipment the highest to position accuracy demand in existing naval vessel every the demand of rushing, be used for meeting this type of equipment anti-shock purpose.
The invention has the beneficial effects as follows:
(1) for function, this isolator is in addition to shock resistance, vibration isolation, when suffering the impact shock load of small magnitude
(small magnitude here refers to that load is less than the pretightning force of spring), spring is indeformable, by precision instrument and the naval vessels of insulation blocking
There is no relative motion, be particular enable to ensure the precision of navigator.
(2) method for simplifying that it is emulated is proposed, it is simple to be simulated analyzing, experimentation cost can be greatly saved.
Accompanying drawing illustrates:
Fig. 1 is the overall schematic of spacer structures；
Fig. 2 is the sectional structure schematic diagram of spacer structures；
Fig. 3 is spacing ring structure schematic diagram；
Fig. 4 is the structural representation of outer sleeve；
Fig. 5 is the sectional structure chart of outer sleeve；
Fig. 6 is the structural representation of inner sleeve；
Fig. 7 is the sectional structure schematic diagram of inner sleeve；
Fig. 8 is the structural representation of guide rail；
Fig. 9 is the structural representation of bottom end cover
Figure 10 is the scheme of installation of sliding pin；
Figure 11 is the simplification figure of isolator；
Figure 12 is the real work power-deflection characteristic curve of isolator；
Figure 13 is the theoretical simulation power-deflection characteristic curve of isolator；
Figure 14 is the actual emulation power-deflection characteristic curve of isolator；
Wherein: equipment 1, equipment mounting seat 2, spacing ring 3, outer sleeve 4, inner sleeve 5, spring 6, push pedal 7, sliding pin 8, lower end
Lid 9, guide rail 10, installation foundation 11.
Detailed description of the invention: the present invention is described further below in conjunction with the accompanying drawings:
As it is shown in figure 1, a kind of precision equipment shock isolator, this isolator includes: equipment outer sleeve 4, inner sleeve 5,
Spring 6, push pedal 7, sliding pin 8 and guide rail 10；
Guide rail 10 includes main guide rail 10-1, shaft shoulder 10-2 and base 10-3；
Outer sleeve 4 includes upper cavity 4-1 and lower chamber 4-2, and the partition wall between upper cavity 4-1 and lower chamber 4-2 sets
It is equipped with the guide rail hole 4-4 passed for main guide rail 10-1 and main guide rail 10-1 and constitutes sliding pair, on the outer wall of lower chamber 4-2 bottom
It is provided with the pin hole 4-3 for installing sliding pin 8；
Inner sleeve 5 includes guide rail hole 5-1, chute 5-2 and inner chamber body 5-3, the guide rail hole 5-1 position passed for main guide rail 10-1
Sliding pair is constituted in the top of inner sleeve 5 and main guide rail 10-1；
Outer sleeve 4, inner sleeve 5, spring 6 and push pedal 7 are all set on the main guide rail 10-1 of guide rail 10, and inner sleeve 5 is set with
Inside the lower chamber 4-2 of outer sleeve 4；The guide rail hole 5-1 of inner sleeve 5 overlaps with the guide rail hole 4-4 of outer sleeve 4, main guide rail 10-
1 puts in the upper cavity 4-1 of outer sleeve 4 through upper end after inner sleeve 5, inner sleeve guide rail hole 5-1 and outer sleeve guide rail hole 4-4,
In upper cavity 4-1, it is provided with the upper end with main guide rail 10-1 is connected the spacing ring 3 of linkage；The guide rail hole 4-4 of outer sleeve 4 makes
Outer sleeve translates along guide rail 10；
In spring 6 is arranged on inner sleeve 5 and be enclosed within main guide rail 10-1, push pedal 7 is positioned at the lower end of spring 6, sliding pin 8 one end
Be fixed on the pin hole 4-3 of outer sleeve 4 correspondence, the other end through inner sleeve 5 chute 5-2 after be close to push pedal 7 downside peace
Dress.
The equipment mounting seat for installing the precision equipment 1 needing to carry out impact isolating it is provided with on the top of outer sleeve 4
2。
Be provided with bottom end cover 9 in the lower end of inner sleeve 5, bottom end cover 9 is positioned at the lower end of sliding pin 8.
Sliding pin 8 be can with outer sleeve 4 along inner sleeve 5 chute 5-2 slide structure.
Movable sealing between guide rail hole 4-4 on main guide rail 10-1 and outer sleeve 4 and the guide rail hole 5-1 on inner sleeve 5.
It is filled with damping fluid in upper cavity 4-1, spacing ring 3 is provided with damping hole 3-1 and for being arranged on main guide rail
The installing hole 3-2 of 10-1 upper end.
The circumference of spacing ring 3 it is distributed in for exchanging the damping hole 3-1 of damping fluid；Installing hole 3-2 is positioned at spacing ring 3
Middle part, for assembling with guide rail 10.
Chute 5-2 is distributed on the wall of inner sleeve 5 bottom, additionally, pin hole 4-3 is corresponding with the position of chute 5-2, and pin
Hole 4-3, sliding pin 8 are consistent with the quantity of chute 5-2.
The axial length of the upper cavity 4-1 of outer sleeve 4 and the maximum relative displacement needing the equipment 1 carrying out isolating to be allowed
Unanimously.
The side that the isolator model emulation utilizing the precision equipment shock isolator described in claim 1 to be implemented is analyzed
Method, it is characterised in that:
Realize step as follows:
Step (1): set up in Ansys software the spring unit and being used for for analog isolation device simulate needs impact every
From the mass unit of equipment, one end B of spring unit is connected with mass unit, and the other end A of spring unit is used for applying impact
Load；
Step (2): as it is shown in figure 9, power-deflection characteristic curve parameter gives spring unit, and spring unit will be given
Corresponding damping parameter, encloses qualitative attribute to mass unit simultaneously；
Step (3): to arrange analysis type be transient state to the module that solves in Ansys software, and inside solves integral algorithm and is
Newmark time integration method；
Step (4): apply shock loading at spring A end and carry out simulation calculation, shock loading be sinusoidal unicast or sine just
Negative double wave, triangular wave unicast or positive and negative combined triangular ripple or the vibration signal of loop cycle；
Step (5): after having calculated, the time post-processing module at Ansys carries out checking of simulation result；It it is quality list
Acceleration responsive, relative displacement response or the speed responsive of unit；Wherein: the displacement d of the displacement D of load(ing) point A, mass unit B point,
The difference between the two Δ d=| D-d |, Δ d are the practical distortion amount of isolator, are also that simulator is relative in impact process simultaneously
The position range of pedestal.
The spring 6 of isolator can only compress, and its work response presents two feature stage, and a feature stage is to work as equipment
When inertia force suffered by 1 is more than the pretightning force of isolator, spring 6 starts compression；Another feature stage is when suffered by equipment 1
When inertia force is less than or equal to the pretightning force of isolator, spring 6 keeps original state.
The power of spring 6 reality of isolator-deflection characteristic curve a: slope is spring rate K, starting point be A (0,
F0), terminal is B (x1, F1) curve 1.
In isolator simplified model, spring 6 can stretch or compress, and its work process presents three phases: the first stage,
During equipment 1 relative hull installation foundation positive movement, spring unit stretches；Second stage, the relative hull installation foundation of equipment 1 without
During motion, spring unit is without decrement；Phase III, during equipment 1 relative hull installation foundation negative movement, spring unit pressure
Contracting.
Power-deflection characteristic curve a that the spring of isolator is actual is changed into spring in isolator simplified model composed
The power given-deflection characteristic curve b, its characteristic curve b include: one is in slope is K, and starting point is C (0, F0), terminal is D
(x1, F1) curve 2；Article one, slope is K, and starting point is A (x2, F2), terminal is B (0 ,-F0) curve 3.
The power being given spring in isolator simplified model-deflection characteristic curve b is optimized and is processed as curve c,
Described curve c includes: a slope being in coordinate axes first quartile is K, and starting point is C (x3, F0), terminal is D (x1,
F1) curve 3；Article one, slope is KACX is met at x-axis3Point, starting point is B (0 ,-F0), terminal is C (x3, F0) curve 4；Article one,
Slope is K, and starting point is A (x2, F2), terminal is B (0 ,-F0) curve 6.
The lower end of guide rail 10 is for the installation foundation 11 being fixed on naval vessel or miscellaneous equipment by isolator.
Inner sleeve 5 is internal is inner chamber body 5-3, is mainly used in installing spring 6；
The bottom of guide rail 10 is base 10-3, base 10-3 is provided with installing hole 10-4, guide rail 10 is provided with the shaft shoulder
10-2, it is positioned at the main guide rail 10-1 position below of guide rail 10 as shown in Figure 2；Bottom end cover 9 is positioned at below shaft shoulder 10-2.
Base 10-3 is positioned at the foot of guide rail 10, and isolator is installed to be correlated with by its effect by installing hole 10-4
On installation foundation.Additionally, guide rail 10 is monolithic construction, main guide rail 10-1, shaft shoulder 10-2, base 10-3 and installing hole 10-4 by
Same blank processes.
As in figure 2 it is shown, upper cavity 4-1 and lower chamber 4-2 lays respectively at the both sides up and down of guide rail hole 4-4；In upper cavity 4-1
Full damping fluid, predominantly isolator provide damping and effective cushion space；In impact process, spacing ring 3 can be at cavity 4-
Motion reciprocal in 1, the damping fluid of intracavity can be circulated by the damping hole 3-1 on spacing ring 3, and then plays certain resistance
Buddhist nun acts on.Lower chamber 4-2 is mainly used in installing inner sleeve 5；Pin hole 4-3 is distributed on the outer wall in lower chamber 4-2 portion, mainly uses
In installing sliding pin 8.
Bottom end cover 9 includes faying face 9-1 and trimming 9-2.Wherein: guide rail hole 9-1 is used for installing guide rail 10；Trimming 9-2 is altogether
Count 4 surroundings being distributed in bottom end cover 9, for facilitating the dismounting of bottom end cover 9.
Additionally, spring 6 can be realized in inner sleeve by pin hole 4-3 position of opening vertically on regulation outer sleeve 4
Pre compressed magnitudes different in cylinder 5, to adapt to asking every strategically important place of different shock environment.
Isolator operation principle is as follows:
When Ship Structure is impacted by small magnitude, owing to the spring 6 in isolator has certain pre compressed magnitude, impact carries
Lotus is less than the pretightning force of spring, and spring is indeformable, is not had relative motion by equipment 1 and the hull installation foundation 11 of insulation blocking,
Enable in particular to ensure the detection accuracy of this precision equipment of navigator.
When Ship Structure is impacted by amplitude, shock loading is more than the pretightning force of spring, and spring can produce compression and become
Shape.Different according to the compression mechanism of spring in motor process, isolator operation principle presents following four feature stage:
The fisrt feature stage: hull installation foundation 11 is under the impact loading of forward, and hull installation foundation 11 promotes
Guide rail 10 moves upward, and shaft shoulder 10-2 disengages with bottom end cover 9, and the shaft shoulder 10-2 of guide rail 10 heads on push pedal 77 compression spring 6,
The relative inner sleeve 5 of guide rail 10, outer sleeve 4, bottom end cover 9 and sliding pin 8 move upward, and spring 6 is in the first compression stage.
The second feature stage: when the impact loading of forward stops, spring 6 by compression is in self-recovery power effect
Under, the spring 6 of compression heads on inner sleeve 5, outer sleeve 4, bottom end cover 9, equipment mounting seat 2 and equipment 1 the most successively and moves upward,
Inner sleeve 5 now moves together with outer sleeve 4, and spring 6 is in and once recovers the former long stage；
In the third feature stage: after spring 6 recovers former length, due to the effect of inertia of equipment 1, the relative hull of equipment 1 is installed
Pedestal 11 and guide rail 10 move upward, and coupled equipment mounting seat 2 and outer sleeve 4 also opposite rail move upward, overcoat
Cylinder 4 moves upward along chute 5-2 with sliding pin 8, heads on push pedal 7 compression spring 6, and now the shaft shoulder 10-2 of guide rail 10 pushes up downwards
Bottom end cover 9 and inner sleeve 5.And then make that inner sleeve 5 is relative with outer sleeve 4 to slide, now, spring 6 is in second-compressed rank
Section.
The fourth feature stage: spring 6 is under self-recovery power effect, and the lower end of spring 6 heads on push pedal 7 and moves downward, and pushes away
Plate 7 heads on sliding pin 8, and sliding pin 8 moves downward with outer sleeve 4, equipment mounting seat 2 and equipment 1, and spring is in secondary and recovers former length
Stage.In whole impact process, spring is in compressive state all the time, is absorbed by the deformation of spring and releases energy.In impact
During spacing ring 3 can motion reciprocal in cavity 4-1, the damping fluid in cavity 4-1 can be by the damping hole on spacing ring 3
3-1 is circulated, and then makes damping fluid that equipment is produced damping.
Additionally, the axial length of the upper cavity 4-1 of outer sleeve 4 and the maximum phase needing the equipment 1 carrying out isolating to be allowed
Consistent to displacement, when spacing ring 3 moves to topmost and the foot of upper cavity 4-1, spring 6 will not continue deformation, this
Time be isolated relative distance between equipment 1 and installation foundation 11 and will not continue to occur, and then ensure that the precision of equipment 1.
The invention will be further described below in conjunction with the accompanying drawings:
As depicted in figs. 1 and 2, a kind of shock isolator of the present invention, for carrier-borne precision equipment, outside schematic diagram such as figure
Shown in A, internal structure is as shown in panelb.
As it is shown on figure 3, be provided with damping hole 3-1 on spacing ring 3 and for being arranged on the installing hole of main guide rail 10-1 upper end
3-2。
As shown in Figure 4 and Figure 5, pin hole 4-3 is distributed on the outer wall of lower chamber 4-2 bottom, is mainly used in installing sliding pin
8。
As shown in Figure 6 and Figure 7, chute 5-2 is distributed on the outer wall of inner chamber body 5-3 bottom, and sliding pin 8 can be along chute 5-2
Mobile.Additionally, pin hole 4-3, sliding pin 8 are consistent with the quantity of chute 5-2.
As shown in Figure 8, main guide rail 10-1 is positioned at the top of guide rail 10, and the upper end of main guide rail 10-1 is used for installing spacing ring 3,
Shaft shoulder 10-2 is positioned at the centre position of guide rail 10；Base 10-3 is positioned at the foot of guide rail 10, and its effect is by installing hole 10-
Isolator is installed on the installation foundation be correlated with by 4.
As it is shown in figure 9, bottom end cover 9 includes: faying face 9-1 and trimming 9-2.Wherein: faying face 9-1 is for joining with push pedal 7
Close the compression realized spring 6；Trimming 9-2 4 surroundings being distributed in bottom end cover 9 altogether, for the dismounting of bottom end cover 9.
As shown in Figure 10, for the scheme of installation of sliding pin 8, additionally, by pin hole 4-3 on regulation outer sleeve 4 vertically
On position of opening can realize the pre compressed magnitude that spring 6 is different in inner sleeve 5, with adapt to different shock environment every strategically important place
Ask.So having the isolator of pretightning force, shock loading is less when, isolator can't occur relative motion；Only
When shock loading reaches certain value, isolator just can occur relative motion, is carried out the suction of impact energy by compression spring 6
Receive the isolation to impact with release and then realization；Isolator is all realized by compression spring 6 during punching in realization,
During impact isolating, spring 6 is constantly in compressive state.
As shown in figure 11, simplifying figure for isolator, isolator is reduced to spring-damper system.
As shown in figure 12, wherein coordinate F represents the restoring force of spring；Abscissa x represents the relative displacement Δ x, Δ x of spring
Pretension deflection is deducted equal to spring total deformation.As shown in figure 12, its curve a is isolator precision equipment shock isolator
Power in practical work process-deflection characteristic curve a, described curve a include: a slope is spring rate K, and starting point is
A (0, F0), terminal is B (x1, F1) curve 1.
Shown in Figure 13, its curve b be after the power in isolator practical work process-deflection characteristic curve a changes every
Power-deflection characteristic curve b during device simplifies spring works, described curve b includes: one is in slope is K, rises
Point is C (0, F0), terminal is D (x1, F1) curve 2；Article one, slope is K, and starting point is A (x2, F2), terminal is B B (0 ,-F0)
Curve 3.
As shown in figure 14, its curve c is assignment and the power-deflection characteristic curve c of spring unit, institute after curve b optimizes
The curve c stated includes: a slope being in coordinate axes first quartile is K, and starting point is C (x3, F0), terminal is D (x1,
F1) curve 3；Article one, slope is KACX is met at x-axis3Point, starting point is B (0 ,-F0), terminal is C (x3, F0) curve 4；Article one,
Slope is K, and starting point is A (x2, F2), terminal is B (0 ,-F0) curve 6.
Claims (10)
1. a precision equipment shock isolator, it is characterised in that: include outer sleeve (4), inner sleeve (5), spring (6), push away
Plate (7), sliding pin (8) and guide rail (10)；
Guide rail (10) includes main guide rail (10-1), the shaft shoulder (10-2) and base (10-3)；
Outer sleeve (4) includes upper cavity (4-1) and lower chamber (4-2), the separation between upper cavity (4-1) and lower chamber (4-2)
It is provided with the guide rail hole (4-4) passed for main guide rail (10-1) on wall and main guide rail (10-1) constitutes sliding pair, at lower chamber
(4-2) pin hole (4-3) for installing sliding pin (8) it is provided with on the outer wall of bottom；
Inner sleeve (5) includes guide rail hole (5-1), chute (5-2) and inner chamber body (5-3), the guide rail passed for main guide rail (10-1)
Hole (5-1) is positioned at top and main guide rail (10-1) the composition sliding pair of inner sleeve (5)；
Outer sleeve (4), inner sleeve (5), spring (6) and push pedal (7) are all set on the main guide rail (10-1) of guide rail (10), inner sleeve
The lower chamber (4-2) that cylinder (5) is set in outer sleeve (4) is internal；The guide rail hole (5-1) of inner sleeve (5) and the guide rail of outer sleeve (4)
Hole (4-4) overlaps, after main guide rail (10-1) passes inner sleeve (5), inner sleeve guide rail hole (5-1) and outer sleeve guide rail hole (4-4)
Upper end puts in the upper cavity (4-1) of outer sleeve (4), is provided with the upper end with main guide rail (10-1) even in upper cavity (4-1)
Connect the spacing ring (3) of linkage；
Spring (6) is arranged in inner sleeve (5) and is enclosed within main guide rail (10-1), and push pedal (7) is positioned at the lower end of spring (6), sliding
Pin (8) one end is fixed on the pin hole (4-3) that outer sleeve (4) is corresponding, after the other end passes the chute (5-2) of inner sleeve (5)
The downside being close to push pedal (7) is installed.
Precision equipment shock isolator the most according to claim 1, it is characterised in that: arrange on the top of sleeve (4)
There is the equipment mounting seat (2) for installing the precision equipment (1) needing to carry out impact isolating.
Precision equipment shock isolator the most according to claim 1, it is characterised in that: pacify in the lower end of inner sleeve (5)
Equipped with bottom end cover (9), bottom end cover (9) is positioned at the lower end of sliding pin (8).
Precision equipment shock isolator the most according to claim 1, it is characterised in that: sliding pin (8) is can be with overcoat
The structure that cylinder (4) slides along the chute (5-2) of inner sleeve (5).
Precision equipment shock isolator the most according to claim 1, it is characterised in that: main guide rail (10-1) and outer sleeve
Movable sealing between guide rail hole (4-4) and inner sleeve guide rail hole (5-1).
Precision equipment shock isolator the most according to claim 5, it is characterised in that: it is filled with in upper cavity (4-1)
Damping fluid, is provided with damping hole (3-1) on spacing ring (3) and is used for being arranged on the installing hole (3-of main guide rail (10-1) upper end
2)。
Precision equipment shock isolator the most according to claim 6, it is characterised in that: for exchanging the damping of damping fluid
(3-1) is distributed on the circumference of spacing ring (3) in hole；Installing hole (3-2) is positioned at the middle part of spacing ring (3), is used for and guide rail (10)
Assemble.
Precision equipment shock isolator the most according to claim 1, it is characterised in that: chute (5-2) is distributed in inner sleeve
On the wall of cylinder (5) bottom, additionally, pin hole (4-3) is corresponding with the position of chute (5-2), pin hole (4-3), sliding pin (8) are with sliding
The quantity of groove (5-2) is consistent.
Precision equipment shock isolator the most according to claim 1, it is characterised in that: the upper cavity (4-of outer sleeve (4)
1) axial length is consistent with the maximum relative displacement needing the equipment (1) carrying out isolating to be allowed.
10. the side that the isolator model emulation utilizing the precision equipment shock isolator described in claim 1 to be implemented is analyzed
Method, it is characterised in that:
Realize step as follows:
Step (1): set up in Ansys software for the spring unit of analog isolation device and need impact isolating to set for simulation
Standby mass unit, one end B of spring unit is connected with mass unit, and the other end A of spring unit is used for applying shock loading；
Step (2): give spring unit by power-deflection characteristic curve parameter, and give spring unit corresponding damping parameter,
Enclose qualitative attribute to mass unit simultaneously；
Step (3): to arrange analysis type be transient state to the module that solves in Ansys software, and inside solves integral algorithm and is
Newmark time integration method；
Step (4): apply shock loading at spring A end and carry out simulation calculation, shock loading is sinusoidal unicast or sinusoidal positive and negative double
Ripple, triangular wave unicast or positive and negative combined triangular ripple or the vibration signal of loop cycle；
Step (5): after having calculated, the time post-processing module at Ansys carries out checking of simulation result；It it is mass unit
Acceleration responsive, relative displacement response or speed responsive；Wherein: the displacement d of the displacement D of load(ing) point A, mass unit B point, the two
Difference △ d=| D-d |, △ d be the practical distortion amount of isolator, be also simulator opposite base in impact process simultaneously
Position range.
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| CN201610164300.2A CN105840722B (en) | 2016-03-19 | 2016-03-19 | Precision equipment shock isolator and its emulation mode |
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|---|---|---|---|
| CN201610164300.2A CN105840722B (en) | 2016-03-19 | 2016-03-19 | Precision equipment shock isolator and its emulation mode |
Publications (2)
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| CN105840722A true CN105840722A (en) | 2016-08-10 |
| CN105840722B CN105840722B (en) | 2018-04-13 |
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| CN106768781A (en) * | 2017-01-10 | 2017-05-31 | 北京强度环境研究所 | A kind of waveform generator for blocking impact test |
| CN107808047A (en) * | 2017-10-25 | 2018-03-16 | 厦门大学 | A kind of design method of the unimolecule electrical measurement device of vibration isolation configuration |
| CN111625982A (en) * | 2020-05-29 | 2020-09-04 | 成都赫尔墨斯科技股份有限公司 | Impact and crash analysis method of portable navigation equipment based on Ansys |
| CN106768781B (en) * | 2017-01-10 | 2024-05-10 | 北京强度环境研究所 | Waveform generator for blocking impact test |
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| CN107808047A (en) * | 2017-10-25 | 2018-03-16 | 厦门大学 | A kind of design method of the unimolecule electrical measurement device of vibration isolation configuration |
| CN107808047B (en) * | 2017-10-25 | 2020-10-09 | 厦门大学 | Design method of monomolecular electrical measuring device with vibration isolation structure |
| CN111625982A (en) * | 2020-05-29 | 2020-09-04 | 成都赫尔墨斯科技股份有限公司 | Impact and crash analysis method of portable navigation equipment based on Ansys |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105840722B (en) | 2018-04-13 |
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