CN110159697B - Gas-liquid buffer damper for initiating explosive device - Google Patents
Gas-liquid buffer damper for initiating explosive device Download PDFInfo
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- CN110159697B CN110159697B CN201910084815.5A CN201910084815A CN110159697B CN 110159697 B CN110159697 B CN 110159697B CN 201910084815 A CN201910084815 A CN 201910084815A CN 110159697 B CN110159697 B CN 110159697B
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- piston rod
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/56—Means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention provides an initiating explosive device gas-liquid buffering damper, which comprises a first shell, an initiating explosive device, a floating piston piece, a first one-way valve, buffering liquid and a piston rod assembly, wherein the first shell is provided with a first accommodating cavity and a second accommodating cavity, the initiating explosive device is arranged at one end of the first shell and used for generating buffering gas, the floating piston piece is movably arranged in the first shell, the first one-way valve is arranged on the floating piston piece and used for preventing the buffering gas from moving from the second accommodating cavity to the first accommodating cavity, the buffering liquid is arranged in the second accommodating cavity, the piston rod assembly is movably arranged in the second accommodating cavity, the piston rod assembly is provided with a first through hole, and the buffering damper provides liquid buffering damping force by enabling the buffering liquid to flow through the first through hole. By applying the technical scheme of the invention, the technical problems of high buffering damping performance and locking cost of the buffer and difficult ground operation and maintenance in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of buffers for aircrafts, in particular to an initiating explosive gas-liquid buffer damper.
Background
At present, buffer buffers for aircrafts mainly have two main types: the solid spring buffer damper comprises a solid spring buffer damper core element which is a spring or rubber, and a fluid spring buffer damper core element which is generally gas, liquid or gas-liquid mixture. The solid spring buffer belongs to the working principle of energy storage and post-release, has the advantages of simple structure, reliable work and convenient maintenance, and is mainly used for small aircrafts and small-magnitude buffer damping, such as the landing gear buffer damping of small unmanned aerial vehicles. The liquid spring buffer belongs to the working principle of air compression and small hole throttling energy consumption, in particular to a gas-liquid buffer damper which has the best efficiency and work absorption capacity, so that the existing aircraft, particularly large-scale and large-scale buffer dampers, mostly adopt the gas-liquid buffer damper, such as an aircraft recovery buffer device.
With the development of the overall technology of the aircraft, new configurations, layouts and functions begin to emerge and are continuously developed, and the requirements on the buffer damper are higher and higher, which are mainly represented as follows: a high degree of integration of the functions of the cushion damper is required; the buffer mechanism system is locked by self-locking of the buffer damper, and a buffer mechanism system locking mechanism is not separately arranged; the large-magnitude buffer damping has higher and higher pressure on gas filled in the damper, the larger the gas pressure is, the higher the locking requirement on the initial state of the buffer system is, the more difficult the buffer mechanism system is operated or maintained on the ground, even a special operation tool needs to be designed and produced, the contradiction between the high buffer damping performance and the locking cost is large, and the maintenance difficulty is prominent, so that the requirements of realizing the large-magnitude buffer damping can be met, the functions of small locking cost, convenience in maintenance and the like can be realized, the problems of strong working state capacity and large initial state force of the buffer damping of the damper need to be solved, and the traditional buffer damper is difficult to meet the requirements.
Disclosure of Invention
The invention provides an initiating explosive device gas-liquid buffer damper which can solve the technical problems that a buffer in the prior art is high in buffer damping performance, high in locking cost and difficult in ground operation and maintenance.
The invention provides an initiating explosive device gas-liquid buffer damper, which comprises: a first housing having a first accommodating chamber and a second accommodating chamber; the initiating gas device is arranged at one end of the first shell and is used for generating buffer gas; the floating piston piece is movably arranged in the first shell, a first accommodating cavity is formed between the floating piston piece and the initiating gas device, and a second accommodating cavity is formed between the floating piston piece and the other end of the first shell; a first check valve provided on the floating piston member for preventing the buffer gas from moving from the second accommodating chamber to the first accommodating chamber; the buffer liquid is arranged in the second accommodating cavity; and the piston rod assembly is movably arranged in the second accommodating cavity and is provided with a first through hole, and the buffer damper provides liquid buffer damping force by enabling buffer fluid to flow through the first through hole.
Further, the piston rod assembly has a locking hole provided on an outer wall surface thereof; the initiating explosive gas-liquid buffer damper also comprises a second shell, an elastic piece, a step locking piece, a communication pipeline and an overflow valve assembly, wherein the second shell is communicated with the first shell, the second shell is provided with a shell accommodating cavity, the elastic piece is arranged in the second shell, the step locking piece is movably arranged in the second shell and is positioned between the elastic piece and the first shell, the step locking piece is provided with a matching end and a locking end, the matching end is abutted against the elastic piece, and the locking end is used for being matched with the locking hole to fix the piston rod assembly at a set position; the first chamber that holds includes first cavity and second cavity, and first cavity setting is between firer gas device and overflow valve subassembly, and the second cavity setting is between overflow valve subassembly and floating piston spare, and the intercommunication pipeline holds the chamber with first cavity and casing respectively and is connected, and the overflow valve subassembly is used for making buffer gas to get into the casing through the intercommunication pipeline and holds the chamber and hold in order to realize locking end and locking hole separation when pressure in first cavity does not reach the settlement pressure threshold value.
Further, the product of the relief pressure of the relief valve assembly and the end surface area of the locking end of the stepped locking member is greater than 1.5 times the ultimate elastic force value of the elastic member.
The piston rod assembly comprises a piston rod and a piston ring, the piston ring is fixedly arranged at one end of the piston rod, the first through hole is formed in the piston ring, the piston rod is provided with a liquid accommodating cavity and a second through hole, the piston rod comprises a partition plate, the partition plate is arranged in the liquid accommodating cavity, and the second through hole is formed in the partition plate; the initiating explosive device gas-liquid buffering damper further comprises a buffering oil needle which is fixedly arranged on the floating piston piece and used for being matched with the second through hole to change the flow area of the buffering liquid.
Further, the buffering oil needle is provided with a gas flowing hole, the gas flowing hole is formed in one end, close to the floating piston piece, of the buffering oil needle, the other end of the buffering oil needle is of a conical structure, and the conical structure is matched with the second through hole to change the flow area of the buffering liquid.
Further, gas-liquid buffering attenuator still includes filtering component, and filtering component sets up at first holding the intracavity, and filtering component is close to the setting of firer gas device, and filtering component is arranged in filtering the solid particle among the buffer gas.
Further, gas-liquid buffering attenuator still includes the second check valve group, and the second check valve group sets up at the first intracavity that holds, and overflow valve subassembly sets up between filtering component and second check valve group, and the second check valve group is used for preventing that buffer gas from holding the chamber by the second and holding the removal in chamber to the first chamber that holds.
Further, the second check valve group is provided with a plurality of check overflowing channels which are uniformly arranged at intervals.
Furthermore, the area of the one-way overflowing channel of the first one-way valve is smaller than or equal to the area of any one-way overflowing channel of the second one-way valve group.
Furthermore, the first shell is provided with a limiting conical surface, the limiting conical surface is arranged on the surface of the cavity of the first accommodating cavity, the floating piston piece is provided with a conical positioning surface, and the conical positioning surface is matched with the limiting conical surface to realize the positioning of the floating piston piece in the first shell.
By applying the technical scheme provided by the invention, the initiating gas-liquid buffer damper solves the problems of large initial state force and difficult ground maintenance of the buffer damper by utilizing the characteristics of the initiating gas device, namely the characteristics of no gas and resistance generated in a non-working mode. Under the working state, buffer gas is generated by the initiating explosive gas device and works together with the throttling effect of the buffer liquid to realize the large-magnitude buffer damping under the working state, the comprehensive performance of the buffer damping of the buffer damper can be greatly improved under the same condition, and the structural design complexity of the buffer damper is favorably reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 illustrates a cross-sectional view of a pyrotechnic gas liquid damper in an initial state in accordance with an embodiment of the present invention;
fig. 2 is a sectional view showing a hydraulic buffer damper for an initiating explosive device according to an embodiment of the invention in a buffer damping state.
Wherein the figures include the following reference numerals:
10. a first housing; 10a, a first accommodating cavity; 101a, a first cavity; 102a, a second cavity; 10b, a second accommodating cavity; 20. a pyrotechnic gas device; 21. a buffer gas; 30. a floating piston member; 40. a first check valve; 50. a buffer liquid; 60. a piston rod assembly; 60a, a first through hole; 60b, locking holes; 61. a piston rod; 61a, a liquid containing chamber; 61b, a second through hole; 611. a partition plate; 62. a piston ring; 70. a second housing; 70a, a housing accommodating chamber; 80. an elastic member; 90. a step locking member; 90a, a mating end; 90b, a locking end; 100. a communicating pipe; 110. an overflow valve assembly; 120. a buffer oil needle; 120a, gas flow holes; 130. a filter assembly; 140. a second check valve group; 150. an oil filling port; 160. plugging a ring; 170. a first seal ring; 180. a second seal ring; 190. a third seal ring; 200. and (6) supporting the ear.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 and 2, according to an embodiment of the present invention, there is provided an initiating explosive gas-liquid damper including a first housing 10, an initiating explosive gas device 20, a floating piston member 30, a first check valve 40, a buffer liquid 50 and a piston rod assembly 60, the first housing 10 having a first receiving chamber 10a and a second receiving chamber 10b, the initiating explosive gas device 20 being disposed at one end of the first housing 10, the initiating explosive gas device 20 being for generating a buffer gas 21, the floating piston member 30 being movably disposed in the first housing 10, the floating piston member 30 and the initiating explosive gas device 20 forming the first receiving chamber 10a therebetween, the floating piston member 30 and the other end of the first housing 10 forming the second receiving chamber 10b therebetween, a first check valve 40 being disposed on the floating piston member 30, the first check valve 40 being for preventing the buffer gas 21 from moving from the second receiving chamber 10b to the first receiving chamber 10a, the damping liquid 50 is disposed in the second receiving chamber 10b, the piston rod assembly 60 is movably disposed in the second receiving chamber 10b, the piston rod assembly 60 has a first through-hole 60a, and the damping damper provides a liquid damping force by flowing the damping liquid 50 through the first through-hole 60 a.
By applying the configuration mode, the initiating explosive gas-liquid buffering damper is provided, and the problems of large initial state force and difficult ground maintenance of the buffering damper are solved by utilizing the characteristics of the initiating explosive gas device, namely the characteristics that gas and resistance are not generated in a non-working mode. Under the working state, buffer gas is generated by the initiating explosive gas device and works together with the throttling effect of the buffer liquid to realize the large-magnitude buffer damping under the working state, the comprehensive performance of the buffer damping of the buffer damper can be greatly improved under the same condition, and the structural design complexity of the buffer damper is favorably reduced.
As a specific embodiment of the invention, the gas production, the working pressure and the normal temperature pressure after the completion of the work of the initiating explosive gas device can directly select mature products or develop new products by special manufacturers according to the performance requirements of the damper. In view of the relatively low requirement of the buffer damper on the pushing-out performance, the main fuel with low burning speed and clean burning is adopted in combination with the one-time quick working characteristic of the initiating explosive device, and the burning surface control measure is adopted to reduce the speed of gas generation. When a mature product is selected and the initiating explosive device is specially customized, the gas quantity is directly related to the normal temperature pressure in the cavity after the work is finished, and the upper limit of the buffer damping is determined, so that the gas quantity of the initiating explosive device is required to be important. In this embodiment, a floating piston ring may be used as the floating piston member, the main function of the floating piston ring is to implement two-stage damping, and to increase the coverage width and amplitude of the damping, the first check valve 40 is disposed in the middle of the floating piston member 30, and the floating piston ring is made of high-strength alloy steel.
Further, in the present invention, in order to accomplish the automatic switching of the locking and unlocking states of the piston rod assembly between the operating state and the non-operating state to fully exert the damping action of the high-pressure buffer gas 21, the piston rod assembly 60 may be configured to have a locking hole 60b, the locking hole 60b being provided on the outer wall surface of the piston rod assembly 60; the initiating explosive gas-liquid buffer damper further comprises a second shell 70, an elastic piece 80, a step locking piece 90, a communication pipeline 100 and an overflow valve assembly 110, wherein the second shell 70 is communicated with the first shell 10, the second shell 70 is provided with a shell accommodating cavity 70a, the elastic piece 80 is arranged in the second shell 70, the step locking piece 90 is movably arranged in the second shell 70 and is positioned between the elastic piece 80 and the first shell 10, the step locking piece 90 is provided with a matching end 90a and a locking end 90b, the matching end 90a is abutted against the elastic piece 80, and the locking end 90b is used for being matched with the locking hole 60b to fix the piston rod assembly 60 at a set position; the first accommodating cavity 10a comprises a first cavity 101a and a second cavity 102a, the first cavity 101a is arranged between the initiating gas device 20 and the relief valve assembly 110, the second cavity 102a is arranged between the relief valve assembly 110 and the floating piston member 30, the communication pipeline 100 is respectively connected with the first cavity 101a and the housing accommodating cavity 70a, and the relief valve assembly 110 is used for enabling the buffer gas 21 to enter the housing accommodating cavity 70a through the communication pipeline 100 to separate the locking end 90b from the locking hole 60b when the pressure in the first cavity 101a does not reach a set pressure threshold value.
By applying the configuration mode, in the ground maintenance stage, the stepped locking piece is abutted to the piston rod assembly, at the moment, the stepped locking piece bears the shear, the piston rod assembly is fixedly connected with the first shell, and the buffering damper is in a locking state. In the working phase, send ignition signal to the firer gas device, the firer gas device works in order to produce high pressure high temperature gas, when pressure in the first cavity does not reach the set pressure threshold value, buffer gas 21 flows to the casing of second casing through the intercommunication pipeline and holds the chamber, the ladder locking piece receives buffer gas 21 compression, overcome the elastic force of elastic component in order to realize the locking hole separation of locking end and piston rod assembly, when pressure in the first cavity reaches the set pressure threshold value, buffer gas 21 gets into second cavity and second in proper order through the overflow valve subassembly and holds the chamber this moment, buffer gas 21 overcomes the throttle effect that the buffer liquid flows, promote floating piston spare and piston rod assembly to move in place in step, possess the damped condition of buffering promptly. In the mode, the step locking piece is automatically unlocked through the acting force of gas generated by the working of the initiating explosive gas device on the step locking piece, so that the automatic switching of the locking and unlocking states of the piston rod assembly in the working state and the non-working state is completed, and the buffering and damping effects of the high-pressure buffer gas 21 are fully exerted.
Further, in the present invention, in order to enable quick unlocking of the stepped lock, the product of the relief pressure of the relief valve assembly 110 and the end surface area of the lock end 90b of the stepped lock 90 may be configured to be greater than 1.5 times the limit elastic force value of the elastic member 80. As an embodiment of the present invention, a locking pin may be used as the step locking member, and a spring may be used as the elastic member, the locking pin mainly functions to lock the piston rod assembly and the first housing, and the locking pin is made of high-strength alloy steel. The main function of the spring is to achieve that the locking pin is maintained in the locking position, the material of the spring being 60Si2 Mn. The main function of the relief valve assembly 110 is to unlock the locking pin by gas before the high-pressure buffer gas 21 flows to the second receiving chamber, and to conduct to the second chamber when the set pressure threshold is reached, so that the relief valve assembly 110 can directly select a mature product or be newly developed for a target purpose. The main function of the communicating pipeline is to transmit a power source for unlocking the locking pin, namely high-pressure buffer gas, and the communicating pipeline is made of stainless steel.
Further, in the present invention, in order to improve the damping action of the buffer liquid to accomplish the balance and thin relief of the large impact overload, the piston rod assembly 60 may be configured to include a piston rod 61 and a piston ring 62, the piston ring 62 is fixedly disposed at one end of the piston rod 61, a first through hole 60a is disposed on the piston ring 62, the piston rod 61 has a liquid accommodating chamber 61a and a second through hole 61b, the piston rod 61 includes a partition 611, the partition 611 is disposed in the liquid accommodating chamber 61a, and the second through hole 61b is disposed on the partition 611; the initiating explosive device gas-liquid buffering damper further comprises a buffering oil needle 120, the buffering oil needle 120 is fixedly arranged on the floating piston member 30, and the buffering oil needle 120 is used for being matched with the second through hole 61b to change the flow area of the buffering liquid 50.
By applying the configuration mode, after the fire gas-liquid buffer damper is overloaded by large impact, the impact force is transmitted to the piston rod assembly of the damper, the piston rod is retracted quickly, and the buffer liquid flows through the first through hole on the edge of the end face of the piston ring quickly to generate the throttling and energy-consuming effects. When the first containing cavity and the second containing cavity compress and consume energy, the cavity pressure is gradually increased, the gap between the buffer oil needle and the second through hole of the piston rod is gradually reduced, and oil is throttled from the first through hole and the second through hole on the partition plate to consume energy and is gradually increased until balance and thin discharge of large impact overload are completed. As an embodiment of the present invention, as shown in fig. 2, two first through holes are provided at intervals on the piston ring.
As a specific embodiment of the invention, the main function of the piston rod assembly is to transmit external impact overload, hydraulic oil and a second through hole for throttling are arranged in the piston rod, and the piston rod assembly is made of high-strength alloy steel. In this embodiment, hydraulic oil can be used as the buffer liquid, and the hydraulic oil is a fluid medium with small hole flow effect, specifically No. 15 aviation oil, which can be directly purchased or customized.
Further, in the present invention, in order to realize smooth flow of the buffer gas 21 in the first receiving chamber to the second receiving chamber, the buffer oil needle 120 may be configured to have a gas flow hole 120a, the gas flow hole 120a is disposed at one end of the buffer oil needle 120 close to the floating piston member 30, and the other end of the buffer oil needle 120 is a tapered structure, and the tapered structure is matched with the second through hole 61b to change the flow area of the buffer liquid 50. As a specific embodiment of the present invention, the main function of the buffer oil needle 120 is to control the throttle area to improve the energy consumption efficiency of throttling, and the material is high-strength alloy steel.
In addition, in the present invention, in order to ensure the smoothness of the flow of the buffer gas 21, the gas-liquid damper may be configured to further include a filter assembly 130, the filter assembly 130 is disposed in the first receiving chamber 10a, the filter assembly 130 is disposed near the pyrotechnic gas device 20, and the filter assembly 130 is used for filtering solid particles in the buffer gas 21.
As an embodiment of the present invention, the filter element 130 directly faces the high temperature buffer gas 21, the main function of the filter element 130 is to filter solid particles in the high temperature buffer gas 21 and ensure the smoothness of other subsequent flows, the main material of the filter element 130 is stainless steel 2Cr13, the diameter of the particles in the filtered buffer gas 21 is not more than 0.05mm, and mature products can be directly selected or newly developed with pertinence. In order to avoid the impact of the high-temperature and high-pressure buffer gas 21 on the filter assembly, an inlet shielding component is required when a mature product is selected or customized.
Further, in the present invention, in order to avoid the backflow of the buffer gas from the second accommodating chamber to the first accommodating chamber, the gas-liquid buffer damper may be configured to further include a second check valve group 140, the second check valve group 140 is disposed in the first accommodating chamber 10a, the relief valve assembly 110 is disposed between the filter assembly 130 and the second check valve group 140, and the second check valve group 140 is configured to prevent the buffer gas 21 from moving from the second accommodating chamber 10b to the first accommodating chamber 10 a.
As an embodiment of the present invention, the second check valve group 140 has a plurality of uniformly spaced one-way bypass passages. Specifically, as shown in fig. 1 and 2, the second check valve set 140 mainly functions to deliver high-pressure gas to the second cavity and prevent the gas from flowing back from the second cavity, and has a one-way flow channel not smaller than 3, so as to concentrate the high-pressure gas in the second cavity, which can be directly used for selecting mature products or for targeted research. Further, in the present invention, the area of the one-way spill passage of the first check valve 40 is smaller than or equal to the area of any one of the one-way spill passages of the second check valve group 140. In the mode, in the extension stage of the damper, gas with a certain volume is ensured to enter the second accommodating cavity under the condition of ensuring the gas pressure of the first accommodating cavity on the left side, so that oil liquid buffering in the initial stage of the subsequent buffering and recycling stroke is realized. After the buffer recovery is formed, the piston rod at the initial section moves to be gas-liquid buffer, and after the piston rod moves for a certain distance, the piston rod assembly and the floating piston piece move towards the left side together.
Further, in the present invention, in order to achieve the positioning of the floating piston member during the ground maintenance stage, as shown in fig. 2, the first housing 10 may be configured to have a limiting conical surface provided on the cavity surface of the first receiving cavity 10a, and the floating piston member 30 has a tapered positioning surface which cooperates with the limiting conical surface to achieve the positioning of the floating piston member 30 within the first housing 10. As another embodiment of the present invention, the floating piston 30 may not have a tapered positioning surface, and the floating piston is limited only by the limiting tapered surface of the first housing 10.
In addition, in the invention, the initiating explosive gas-liquid buffer damper further comprises an oil filling port 150, a blocking ring 160, a first sealing ring 170, a second sealing ring 180, a third sealing ring 190 and a support lug 200, wherein the oil filling port 150 is arranged on the first shell 10, the oil filling port 150 is an interface for filling hydraulic oil into the second accommodating cavity, and the oil filling port 150 can be directly purchased with standard parts or customized, but needs to meet the characteristics of a one-way valve. The blocking ring 160 is disposed at the other end of the first housing 10, the blocking ring 160 mainly functions to guide and support the piston rod and facilitate installation of the damping damper, and the blocking ring 160 is made of high-strength alloy steel. The primary function of the first housing 10 is to integrate the components of the cushion damper and withstand the gas and liquid pressures, and the material of the first housing 10 is a high strength alloy steel. The support lug 200 is arranged on the first shell 10, the main function of the support lug 200 is to connect the cushion damper with the aircraft base body, and the material of the support lug 200 is high-strength alloy steel. The floating piston member is sealed with the first housing 10 by a first seal ring 170, the piston rod assembly is sealed with the first housing 10 by a second seal ring 180, and the piston rod is sealed with the stopper ring 160 by a third seal ring 190.
In order to further understand the present invention, the hydraulic buffer damper for initiating explosive devices according to the present invention will be described in detail.
As shown in fig. 1 and 2, according to an embodiment of the present invention, there is provided a fire gas-liquid damper, which includes a first housing 10, a fire gas device 20, a floating piston member 30, a first check valve 40, a buffer liquid 50, a piston rod assembly 60, a second housing 70, an elastic member 80, a step locking member 90, a communication pipe 100, an overflow valve assembly 110, a buffer oil needle 120, a filter assembly 130, a second check valve set 140, an oil filling port 150, a blocking ring 160, a first sealing ring 170, a second sealing ring 180, a third sealing ring 190, and a support lug 200, wherein a locking pin is used as the step locking member, a spring is used as the elastic member, hydraulic oil is used as the buffer liquid, a floating piston ring is used as the floating piston member, the fire gas device 20, the filter assembly 130, the overflow valve assembly 110, the second check valve set 140, the support lug 200, and the oil filling port 150 are adopted, The blocking ring 160 and the communication pipe 100 are fixedly connected to the first housing 10, respectively, the second housing 70 is communicated with the first housing 10, the second housing 70 has a housing accommodating chamber 70a, the elastic member 80 is disposed in the second housing 70, and the stepped locking member 90 is movably disposed in the second housing 70 between the elastic member 80 and the first housing 10.
The buffer oil needle 120 and the first check valve 40 are respectively fixedly connected with the floating piston member 30, the piston rod assembly is in small clearance fit with the first shell 10 and the blocking ring 160, the floating piston member 30 is in small clearance fit with the first shell 10, the locking pin is in small clearance fit with the first shell 10, the piston rod is sealed with the blocking ring 160 through the third sealing ring 190, the piston rod assembly is sealed with the first shell 10 through the second sealing ring 180, the floating piston member is sealed with the first shell 10 through the first sealing ring 170, the blocking ring 160 is sealed with the first shell 10 through a sealant or a rubber ring, and the locking pin is sealed with the first shell 10 through a rubber ring.
The working principle of the initiating explosive gas-liquid buffer damper provided by the invention is as follows.
(1) During the ground maintenance phase. When the locking pin is in a locking state, the locking pin bears the scissors, the piston rod assembly 60 is fixedly connected with the first shell 10, the buffer mechanism system can be locked through self-locking of the buffer damper, and at the moment, the floating piston ring is positioned under the action of the limiting conical surface and compressed air in the assembling process. When the locking pin is in a locking and unlocking state, the locking pin is locked and unlocked by manually overcoming the spring force, the piston rod is pulled to overcome the slow throttling effect resistance of the hydraulic oil, the piston rod can be pulled out with smaller force, and the piston rod only needs to be pushed in place at a slow speed when being pushed in (the slower the speed is, the smaller the force is).
(2) And pushing out the piston rod of the damper in a working stage. The ignition signal is sent to the initiating explosive gas device 20, the initiating explosive gas device 20 works to generate high-temperature and high-pressure gas, when the gas passes through the filtering component, solid particles with the diameter larger than 0.05mm are filtered, the gas flows to the annular end face of the locking pin through the communicating pipeline 100, and the locking and unlocking of the locking pin are realized by overcoming the spring force; meanwhile, when the gas pressure reaches the working pressure of the overflow valve assembly 110, the gas flows to the second cavity through the second check valve set 140 (at least 3 channels), the gas in the second cavity flows to the second accommodating cavity (hydraulic oil cavity) through the first check valve on the floating piston ring, thrust is generated on the floating piston ring, the throttling effect of liquid flow of the hydraulic oil cavity is overcome under the gas action of the first accommodating cavity and the second accommodating cavity, the floating piston ring and the piston rod are synchronously pushed to move in place, and the condition of buffering and damping is achieved.
(3) And a retraction working stage (a buffer damping stage) of the damper piston rod. After the corresponding assembly of the buffer damping system is overloaded by large impact, the damping system is transferred to the piston rod of the damper through mechanism conversion, the piston rod retracts rapidly, and hydraulic oil flows through the two first through holes on the edge of the end face of the piston rod rapidly, so that the throttling and energy consumption effects are generated. When the first containing cavity and the second containing cavity compress energy consumption, the cavity pressure is gradually increased (the movement energy consumption is gradually increased under the same condition), the gap between the buffer oil needle and the piston rod is gradually decreased, and the oil is throttled from two first through holes at the edge and a middle gap to consume energy and be gradually increased until the balance and the dilution of large impact overload are completed.
(4) And pushing the damper piston rod out again in the working stage. Under the action of high-pressure gas in the first accommodating cavity and the second accommodating cavity, the piston rod overcomes the throttling effect of hydraulic oil and is pushed out until the piston rod moves to a buffering damping position, and next large overload impact buffering damping is carried out.
In conclusion, the invention provides an initiating explosive gas-liquid buffer damper, which realizes locking and unlocking of a locking pin through acting force of gas generated by the operation of an initiating explosive gas device on the annular end surface of a stepped locking pin; through the matching design of the filtering component, the overflow valve component and the check valve component, the problem that the gas-liquid buffer damper has no locking and unlocking functions and the contradiction between high inflation pressure and complicated ground maintenance after inflation are solved, the comprehensive performance of the buffer damper can be greatly improved under the same condition, the function integration level is high, the design complexity of a buffer mechanism is favorably reduced, and the use requirement of an aircraft can be met; the high-magnitude buffer damping is realized by the compression of high-pressure gas and the throttling energy consumption of liquid generated by the one-time operation of the initiating explosive gas device; the problems of large initial state force and difficult ground maintenance of the buffer damper are solved by utilizing the characteristics of the initiating explosive gas device, namely the characteristics that no gas and resistance are generated in a non-working mode. Compared with the prior art, the initiating explosive gas-liquid buffer damper provided by the invention has the following advantages.
Firstly, the initiating explosive device gas-liquid buffer damper solves the technical problem of integrated locking and unlocking of the buffer damper, can reduce the complexity of a buffer damping system mechanism, and overcomes the defect that the locking and unlocking mechanism needs to be arranged independently in the prior art.
Secondly, the initiating explosive device buffer damper provided by the invention has good buffer damping performance and convenient ground operation and maintenance, solves the contradiction between the large buffer damping performance and the ground maintenance difficulty, and can be widely applied to the aspect of aircraft buffer damping system mechanisms.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an initiating explosive device gas-liquid buffering attenuator which characterized in that, initiating explosive device gas-liquid buffering attenuator includes:
a first housing (10), the first housing (10) having a first accommodation chamber (10a) and a second accommodation chamber (10 b);
the initiating gas device (20), the initiating gas device (20) is arranged at one end of the first shell (10), and the initiating gas device (20) is used for generating buffer gas;
a floating piston member (30), the floating piston member (30) being movably disposed within the first housing (10), the floating piston member (30) and the pyrotechnic gas device (20) forming the first accommodation chamber (10a) therebetween, the floating piston member (30) and the other end of the first housing (10) forming the second accommodation chamber (10b) therebetween;
a first check valve (40), the first check valve (40) being provided on the floating piston member (30), the first check valve (40) being for preventing movement of buffer gas from the second accommodating chamber (10b) to the first accommodating chamber (10 a);
a buffer liquid (50), the buffer liquid (50) being provided in the second accommodation chamber (10 b);
a piston rod assembly (60), the piston rod assembly (60) being movably disposed within the second receiving chamber (10b), the piston rod assembly (60) having a first through-hole (60a), the cushion damper providing a liquid cushion damping force by flowing the cushion liquid (50) through the first through-hole (60 a);
the piston rod assembly (60) has a locking hole (60b), the locking hole (60b) being provided on an outer wall surface of the piston rod assembly (60); the initiating explosive gas-liquid buffer damper also comprises a second shell (70), an elastic piece (80), a step locking piece (90), a communicating pipeline (100) and an overflow valve component (110), the second housing (70) communicating with the first housing (10), the second housing (70) having a housing accommodating chamber (70a), the elastic member (80) is disposed in the second housing (70), the stepped lock member (90) is movably disposed in the second housing (70) between the elastic member (80) and the first housing (10), the stepped locking member (90) having a mating end (90a) and a locking end (90b), the mating end (90a) abuts against the elastic piece (80), and the locking end (90b) is used for being matched with the locking hole (60b) to fix the piston rod assembly (60) at a set position; the first accommodating cavity (10a) comprises a first cavity (101a) and a second cavity (102a), the first cavity (101a) is arranged between the fire gas device (20) and the overflow valve assembly (110), the second cavity (102a) is arranged between the overflow valve assembly (110) and the floating piston member (30), the communication pipeline (100) is respectively connected with the first cavity (101a) and the shell accommodating cavity (70a), and the overflow valve assembly (110) is used for enabling buffer gas to enter the shell accommodating cavity (70a) through the communication pipeline (100) to separate the locking end (90b) from the locking hole (60b) when the pressure in the first cavity (101a) does not reach a set pressure threshold value.
2. The pyrotechnic gas liquid damper as claimed in claim 1 wherein the product of the relief pressure of the relief valve assembly (110) and the end surface area of the locking end (90b) of the stepped lock (90) is greater than 1.5 times the ultimate elastic force value of the elastic member (80).
3. The pyrotechnic gas-liquid damper as claimed in claim 1 wherein the piston rod assembly (60) comprises a piston rod (61) and a piston ring (62), the piston ring (62) is fixedly arranged at one end of the piston rod (61), the first through hole (60a) is arranged on the piston ring (62), the piston rod (61) has a liquid containing chamber (61a) and a second through hole (61b), the piston rod (61) comprises a partition plate (611), the partition plate (611) is arranged in the liquid containing chamber (61a), and the second through hole (61b) is arranged on the partition plate (611); the initiating explosive device gas-liquid buffering damper further comprises a buffering oil needle (120), the buffering oil needle (120) is fixedly arranged on the floating piston piece (30), and the buffering oil needle (120) is used for being matched with the second through hole (61b) to change the flow area of the buffering liquid (50).
4. The pyrotechnic gas-liquid damper as claimed in claim 3 wherein the buffer oil needle (120) has a gas flow hole (120a), the gas flow hole (120a) is provided at one end of the buffer oil needle (120) close to the floating piston member (30), and the other end of the buffer oil needle (120) has a tapered structure, and the tapered structure cooperates with the second through hole (61b) to change an overflowing area of the buffer liquid (50).
5. The pyrotechnic gas liquid damper according to any one of claims 1 to 4, further comprising a filter assembly (130), wherein the filter assembly (130) is arranged in the first accommodating chamber (10a), the filter assembly (130) is arranged close to the pyrotechnic gas device (20), and the filter assembly (130) is used for filtering solid particles in the buffer gas.
6. The pyrotechnic gas liquid cushion damper as claimed in claim 5, further comprising a second check valve group (140), wherein the second check valve group (140) is disposed in the first accommodation chamber (10a), the relief valve assembly (110) is disposed between the filter assembly (130) and the second check valve group (140), and the second check valve group (140) is used for preventing buffer gas from moving from the second accommodation chamber (10b) to the first accommodation chamber (10 a).
7. The pyrotechnic gas liquid damper as claimed in claim 6 wherein the second check valve group (140) has a plurality of evenly spaced one-way flow passages.
8. The pyrotechnic gas-liquid cushion damper as claimed in claim 7 wherein the area of the one-way flow passage of the first check valve (40) is smaller than or equal to the area of any one-way flow passage of the second check valve group (140).
9. The pyrotechnic gas liquid damper as claimed in claim 6 wherein the first housing (10) has a limit taper provided at a cavity surface of the first accommodation chamber (10a), the floating piston member (30) has a tapered locating surface which cooperates with the limit taper to effect location of the floating piston member (30) within the first housing (10).
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| CN201910084815.5A CN110159697B (en) | 2019-01-29 | 2019-01-29 | Gas-liquid buffer damper for initiating explosive device |
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| CN111119033B (en) * | 2020-02-11 | 2021-07-30 | 山东卫安震控金属科技有限公司 | Novel anti-seismic damper for bridge safety and implementation method |
| CN113944716B (en) * | 2021-10-18 | 2023-08-22 | 湖南闽湘消防设备有限公司 | High-temperature-resistant self-extinguishing shock absorber |
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