CN111692258A - Shock-resistant rubber shock absorber - Google Patents
Shock-resistant rubber shock absorber Download PDFInfo
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- CN111692258A CN111692258A CN202010416484.3A CN202010416484A CN111692258A CN 111692258 A CN111692258 A CN 111692258A CN 202010416484 A CN202010416484 A CN 202010416484A CN 111692258 A CN111692258 A CN 111692258A
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- impact
- resistant rubber
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- rubber body
- mounting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
- F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
- F16F3/087—Units comprising several springs made of plastics or the like material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/371—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by inserts or auxiliary extension or exterior elements, e.g. for rigidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
- F16F1/376—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape having projections, studs, serrations or the like on at least one surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
- F16F1/377—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape having holes or openings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
Abstract
An impact-resistant rubber shock absorber belongs to the field of shock absorption. The invention comprises a component I: the mounting core and the inner layer vibration damping rubber body are integrally bonded; and a second component: the mounting base and the outer layer impact-resistant rubber are bonded and integrally formed; the two components are in interference fit; the lower opening of the inner layer vibration damping rubber body is in a round table cavity form; a design form of an impact displacement stroke is reserved between the inner diameter of the upper opening of the outer-layer impact-resistant rubber body and the outer diameter of the mounting core; the diameter of the bottom plate of the installation core is larger than the inner diameter of the upper mouth of the anti-impact rubber body. The invention combines a plurality of rubbers with different moduli, and a plurality of rubbers with different hardness are combined in series into a single vibration damping system, thereby integrating vibration damping and impact resistance and simultaneously reducing the space occupied by the vibration damping system. The invention can buffer high-level impact load to about 60 percent, and simultaneously, the rubber materials with high and low elastic moduli are combined in series, thereby limiting the problem of overlarge impact deformation and greatly protecting the safety of the damped equipment.
Description
Technical Field
The invention belongs to the field of vibration reduction.
Background
Inertial navigation system (hereinafter referred to as inertial navigation): a navigation parameter resolving system which is a gyroscope and an accelerometer as sensitive devices;
laser gyroscope: the inertial navigation instrument is an instrument capable of accurately determining the direction of a moving object, is widely used in modern aviation, navigation, aerospace and national defense industries, and has the accuracy limited by many aspects;
resonance magnification: when the natural frequency of the structure is consistent with the external excitation frequency, the whole system is in a resonance state; the ratio of the vibration magnitude and the excitation magnitude of the structural response is the resonance amplification factor;
buffering efficiency: after the total kinetic energy of the impact passes through the buffer device, the attenuated energy accounts for the proportion of the total kinetic energy of the impact; the shock resistance of the reaction buffer device;
inertial navigation is a very important precision instrument, and equipment for loading inertial navigation is as follows: the missile and the artillery have the characteristics of harsh environment, random broadband and multidirectional vibration; the dynamic environment of complex random vibration excitation such as missile launching accompanied with engine pulse thrust, jet noise and the like; instantaneous high-level impact interference and the like generated at the moment of cannon launching; the air in the optical path of the gyroscope fluctuates, and the position of the reflecting mirror and the beam splitter is dislocated, so that the measurement is unstable; high magnitude shocks even directly cause an overall failure of inertial navigation.
The interference of high-magnitude vibration, especially the impact influence, can not compensate the potential risk of system by relying on the scheme of reinforcing the gyroscope alone, so need supplementary damping system, isolate the potential risk outside the system, protect the security of inertial navigation and the accuracy of aiming. The rubber shock absorber is used as an elastic element which can stably bear load and has an excellent damping function, and is the optimal choice of the inertial navigation shock absorption system.
The existing impact-resistant rubber shock absorber mostly adopts single-layer rubber shock absorption, only one of vibration control and impact resistance can be considered, when the shock absorber works in an environment with vibration and impact effects, the vibration control effect is poor, the buffering efficiency is lower than 30 percent, the shock absorber cannot bear high-magnitude impact, and rubber tearing or debonding damage is caused by frequent impact; or two sets of devices for vibration control and impact control are adopted simultaneously, so that the installation is complicated, the occupied space is large, and the two sets of devices are coupled to influence the dynamic control function.
Disclosure of Invention
The shock-resistant rubber shock absorber provided by the patent integrates vibration control and impact control; at the vibration level, 80% of the vibration magnitude can be isolated outside the system to be damped, and the resonance amplification is about 3; when the impact is in high magnitude (such as 500g/5ms), the buffering efficiency reaches more than 60 percent; the protection of the inertial navigation and other core precision equipment is realized, and the installation space of the vibration reduction system is greatly saved due to the design of integrating two functions of vibration and buffering.
The patent refers to the field of 'shock absorbers'.
1) The shock-resistant assembly is formed by combining a shock-resistant rubber body (1) and a mounting base (3);
2) the mounting base comprises a cylindrical thin wall and two mounting holes (8);
the height of the mounting base is h1,h1Not less than 6 mm; thickness of the cylindrical thin wall is d1，d1Not less than 2 mm; the distance between the two mounting holes and the hole depth are determined according to actual mounting requirements;
3) the cylindrical inner wall of the mounting base and the anti-impact rubber are integrally formed (7) through bonding;
4) the whole impact-resistant rubber is in a thin-wall cylindrical shape, and the thickness of the thin wall is more than or equal to 2 mm;
the thin wall height of the impact-resistant rubber is h4Inner diameter of phi1The internal diameter of the upper die is phi2Wherein phi1-Ф2≥4mm；
The outer wall of the shock-resistant rubber body cylinder comprises a circular boss (9), and the height of the boss is h3The height of the boss from the lower surface of the impact-resistant rubber body is h1The lower surface of the boss is attached to the upper surface of the thin wall of the mounting base; height h of boss3Not less than 2mm, width d1≥2mm；
5) The inner wall of the shock-resistant rubber is in frictional contact (10) with the outer surface of the vibration-damping rubber (2);
6) the vibration damping rubber body is cylindrical in shape, and the outer diameter is equal to 1.05 × phi1And the interference magnitude of 5 percent is designed on the inner wall of the anti-impact rubber; the height of the vibration damping rubber body is h4，h2-h4≥2mm；
The lower opening of the vibration damping rubber body is designed into a circular truncated cone-shaped cavity, wherein the diameter of the upper surface of the circular truncated cone is phi5The lower surface has a diameter of phi6，Ф6≥1/4×Ф5(ii) a The height of the circular truncated cone is h5,h5＝1/2×h4；
7) The vibration damping rubber body and the mounting core (4) are integrally formed (6) through bonding;
8) the vibration damping component consists of a mounting core and a vibration damping rubber body;
9) the mounting core comprises a bottom plate (5) and a mounting hole (12);
the diameter of the negative plate is phi4Wherein phi4＞Ф2(ii) a The thickness of the film is d2Wherein d is2≥1.5mm；
The inner diameter of the mounting hole and the depth of the hole are designed according to actual mounting requirements; outer diameter of phi3Wherein phi2-Ф3≥6mm；
The distance between the bottom surface of the mounting core and the upper surface of the vibration damping rubber is more than 1/2 × (h)4-h5) (ii) a The distance between the mounting core and the upper surface of the shock-resistant rubber is h6，h6≥3mm；
10) The patent refers to an impact-resistant rubber damper consisting of two rubber bodies of different hardness, the Shore HA of the impact-resistant rubber bodies1And Shore hardness HA of the vibration damping rubber body2HAs the relationship of HA1≥3.2 HA2；
11) The annular boss is added on the periphery of the impact-resistant rubber to increase the bonding area between the impact-resistant rubber and the mounting base and improve the reliability of the bonding surface between the impact-resistant rubber and the mounting base;
12) diameter of core plate4Greater than the inner diameter phi of the upper die of the impact-resistant rubber body2Endowing the structure with the capability of failure prevention;
13) outer diameter phi of mounting core mounting hole3Smaller than the inner diameter phi of the upper die of the impact-resistant rubber body2Reserving enough displacement space for the impact process;
14) the distance between the mounting core and the upper surface of the shock-resistant rubber is h6In order to avoid abrasion damage to the outer surface of the rubber during vibration;
the vibration absorber is respectively combined with the vibration-damped equipment and the cabin body through the mounting core and the mounting base, the dynamic displacement of the vibration absorber is very small under the action of low-magnitude excitation, and the vibration-damping function can be realized only through the vibration of the inner-layer colloid. When the external excitation magnitude is increased, the stroke of the shock absorber is increased, and at the moment, the impact-resistant rubber with higher modulus starts to play a role; the shock absorber has the advantages that the shock absorber can bear partial buffer effect of the inner layer of damping rubber, the outer layer of shock-resistant rubber reduces shock magnitude by means of self buffer capacity, shock deformation is restrained by means of high elastic modulus, and working space of the shock absorber is saved.
Through the combined action of the inner layer rubber material and the outer layer rubber material, high-magnitude impact load can be buffered to about 60%, and meanwhile, the rubber materials with high elastic modulus and low elastic modulus are combined in series, so that the problem of overlarge impact deformation is limited, and the safety of the damped equipment is greatly protected.
The invention has the following advantages:
(1) the structural form of the shock absorber with two or more rubber materials with different hardness is combined;
(2) the structural form of the shock absorber is as follows: through the structural form of serial combination of two or more components. The method comprises the following steps: the mounting core and the inner layer vibration damping rubber body are integrally bonded; and a second component: the mounting base and the outer layer impact-resistant rubber are bonded and integrally formed; the two components are in interference fit;
(3) the lower opening of the inner layer vibration damping rubber body is in a round table cavity form;
(4) a design form of an impact displacement stroke is reserved between the inner diameter of the upper opening of the outer-layer impact-resistant rubber body and the outer diameter of the mounting core;
(5) the diameter of the bottom plate of the installation core is larger than the inner diameter of the upper mouth of the anti-impact rubber body.
Drawings
FIG. 1 is a structural view of an anti-shock absorber
An impact resistant rubber body; 2-a vibration damping rubber body; 3-mounting a base; 4, installing a core; 5-installing a core bottom sheet; 6-gluing the vibration-damping rubber and the mounting core; 7-gluing the impact-resistant rubber and the mounting base; 8-base mounting holes; 9-impact resistant rubber body boss; 10-frictional contact between the vibration damping rubber body and the impact resistant rubber body; 11-installing a core and a displacement gap of the anti-impact rubber body; 12-mounting core mounting hole
FIG. 2 is an engineering drawing of an anti-shock absorber
FIG. 3 engineering drawing of the application example of shock-resistant rubber shock absorber
13-rubber vibration damper; 14-damped device (inertial navigation system); 15-a cabin body; 16-mounting screw
Detailed Description
(1) Flow chart or System diagram of example 1
(2) The detailed implementation process of the technical scheme of the embodiment 1 is described by combining the figures
The patent provides a three-way equal-rigidity shock-resistant rubber shock absorber, which comprises a rubber shock absorber (13), a damped assembly inertial navigation system (14), a certain cabin body (15) and mounting screws (16);
firstly, the method comprises the following steps: the shock absorber is used as an elastic support for connecting the inertial navigation system and the cabin body, wherein the mounting core is connected with the shock-absorbing inertial navigation system through 1 mounting hole; the mounting base is connected with the cabin body through 2 mounting holes;
secondly, the method comprises the following steps: the three-direction equal rigidity of the vibration damping system;
thirdly, the method comprises the following steps: 8 points of the shock absorber are installed, and the gravity center of the shock absorption system is superposed with the geometric center and the gravity center position of the inertial navigation system;
fourthly: shock absorberThe deformation needs to be smaller than the design space between the cabin and the inertial navigation system: lateral deformation of the damper is less than d3Vertical deformation less than d4；
Fifth, the method comprises the following steps: the whole system is mostly in a low-magnitude vibration stage, the vibration amplitude is less than 0.5mm, and the outer-layer impact-resistant rubber body is not involved at this time; the system occasionally has high-level impact action, the level can reach 500g/5ms, the stroke of the damping system along the impact direction is increased, the damage caused by excessive deformation of the inner layer rubber can be inhibited by the high-hardness impact-resistant rubber body, and the peak value of the impact level actually applied to the inertial navigation system is 187 g; the impulse response pulse width is 12 ms. And the buffer efficiency of more than 60 percent is realized.
The utility model provides an anti-impact rubber shock absorber relies on the advantage of structure and the high damping characteristic of material, solves the several problems that inertial navigation system faces: (1) the high-magnitude impact generated when the artillery and the like are launched avoids the risk of impact damage through the buffer efficiency of the shock absorber by about 60 percent, and obviously prolongs the service life of the inertial navigation system; (2) the influence of vibration generated by engine and jet noise on the inertial navigation stable aiming function is very obvious, and the vibration absorber can isolate more than 80% of the interference outside the system, so that the accuracy of the aiming function is ensured; (3) the rubber with various different moduli is combined, and the rubber with various different hardnesses is combined into a single vibration damping system in a series connection mode, so that vibration damping and impact resistance are integrated, and the space occupied by the vibration damping system is reduced.
Claims (5)
1. An impact-resistant rubber damper comprising an impact-resistant assembly and a damping assembly: the shock-resistant assembly consists of a shock-resistant rubber body (1) and a mounting base (3), and the vibration-damping assembly consists of a vibration-damping rubber body (2) and a mounting core (4);
shore hardness HA of impact-resistant rubber body1And Shore hardness HA of the vibration damping rubber body2HAs the relationship of HA1≥3.2HA2；
The mounting base and the anti-impact rubber are bonded into a whole (7); the vibration damping rubber body and the mounting core are bonded into a whole (6); the shock-resistant rubber is in frictional contact with the vibration-damping rubber body (10);
the inner diameter of the impact-resistant rubber body (1) is phi1Height of h2The outer diameter of the damping rubber body is equal to 1.05 × phi1Height h 4;
the cylindrical outer wall of the anti-impact rubber body is provided with a circular boss (9);
the lower opening of the vibration damping rubber body is designed into a circular truncated cone-shaped cavity, wherein the diameter of the upper surface of the circular truncated cone is phi5The diameter of the lower surface is phi6，Ф6≥1/4×Ф5(ii) a The height of the circular truncated cone is h5,h5＝1/2×h4；
The mounting core comprises a bottom plate (5) and a mounting hole (12);
the diameter of the negative plate is phi4(ii) a The outer diameter of the ring in which the displacement gap between the mounting core and the impact-resistant rubber body is positioned is phi2Wherein phi4＞Ф2；
The mounting core has an outer diameter of phi3Wherein phi2-Ф3≥6mm；
The distance between the mounting core and the upper surface of the shock-resistant rubber is h6，h6≥3mm。
2. An impact-resistant rubber damper according to claim 1,
the mounting base comprises a cylindrical thin wall and two mounting holes;
the height of the mounting base is h1,h1Not less than 6 mm; thickness of the cylindrical thin wall is d1，d1≥2mm。
3. An impact-resistant rubber damper according to claim 1,
the whole impact-resistant rubber is in a thin-wall cylindrical shape, and the thickness of the thin wall is more than or equal to 2 mm;
the thin wall height of the impact-resistant rubber is h1Inner diameter of phi2The internal diameter of the upper die is phi2Wherein phi1-Ф2≥4mm。
4. An impact-resistant rubber damper according to claim 1,
the height of the circular boss (9) is h3(ii) a The lower surface of the boss is attached to the upper surface of the thin wall of the mounting base; height h of boss3Not less than 2mm, width d1≥2mm。
5. An impact-resistant rubber damper according to claim 1,
the thickness of the bottom sheet of the mounting core is d2Wherein d is2≥1.5mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010416484.3A CN111692258B (en) | 2020-05-18 | 2020-05-18 | Shock-resistant rubber shock absorber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010416484.3A CN111692258B (en) | 2020-05-18 | 2020-05-18 | Shock-resistant rubber shock absorber |
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| CN111692258A true CN111692258A (en) | 2020-09-22 |
| CN111692258B CN111692258B (en) | 2021-12-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377568A (en) * | 2020-11-23 | 2021-02-19 | 西安中科华芯测控有限公司 | Limiting and buffering device for inertial navigation |
| CN112668191A (en) * | 2020-12-31 | 2021-04-16 | 北京航空航天大学 | Analytic dynamic model construction method of buffer base based on rubber shock absorber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377568A (en) * | 2020-11-23 | 2021-02-19 | 西安中科华芯测控有限公司 | Limiting and buffering device for inertial navigation |
| CN112668191A (en) * | 2020-12-31 | 2021-04-16 | 北京航空航天大学 | Analytic dynamic model construction method of buffer base based on rubber shock absorber |
| CN112668191B (en) * | 2020-12-31 | 2023-10-31 | 北京航空航天大学 | Analytical kinetic model construction method of buffer base based on rubber shock absorber |
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| CN111692258B (en) | 2021-12-03 |
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