CN111322344A - Gradual change throttle formula buffer suitable for direction drop test - Google Patents
Gradual change throttle formula buffer suitable for direction drop test Download PDFInfo
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- CN111322344A CN111322344A CN202010339612.9A CN202010339612A CN111322344A CN 111322344 A CN111322344 A CN 111322344A CN 202010339612 A CN202010339612 A CN 202010339612A CN 111322344 A CN111322344 A CN 111322344A
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 230000008859 change Effects 0.000 title claims abstract description 20
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- 230000003139 buffering effect Effects 0.000 abstract description 34
- 238000000034 method Methods 0.000 abstract description 23
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- 230000001133 acceleration Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
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- 238000002474 experimental method Methods 0.000 description 5
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- 238000012986 modification Methods 0.000 description 3
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
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- 239000004411 aluminium Substances 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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- 235000020679 tap water Nutrition 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Classifications
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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
- F16F9/3207—Constructional features
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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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
-
- 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
- F16F9/18—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 with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—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 with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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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
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
- F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
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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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the field of hydraulic buffering devices, and particularly discloses a gradual-change throttling type buffering device suitable for a guided drop test. The hydraulic buffer device has the advantages that the buffering process of the hydraulic buffer device is stable, and the damage of the hydraulic cylinder structure caused by the sudden change of the acceleration at the buffering starting point and the buffering end point of the traditional buffer device is avoided.
Description
Technical Field
The invention relates to the field of hydraulic buffer devices, in particular to a gradual throttling buffer device suitable for a guide drop test.
Background
The guiding drop test is to control the posture of a test product before the target collision in the test process so as to ensure that the final target collision posture of the product meets the test requirements. The variable-throttle hydraulic buffer device is an important component of a drop test system, and has the function of buffering a guide steel frame so as to ensure that the structure of the device is intact and the device can be used repeatedly. The traditional variable-throttle hydraulic buffer device is mainly used for buffering a moving piston in a hydraulic cylinder, is arranged at the bottom of the hydraulic cylinder as shown in figures 1 and 2 according to the structural principle, has short buffer stroke and small buffer energy, and is not suitable for buffering objects with long stroke and large impulse in a drop test. Meanwhile, the traditional variable-throttle buffering device has no speed sudden change for equal-speed buffering, namely no hard impact exists, but acceleration sudden change exists at the buffering starting point and the buffering end point, as shown in fig. 3, namely the problem of soft impact exists, and the hydraulic cylinder structure is easily damaged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a gradual-change throttling type buffer device suitable for a guide drop test.
The purpose of the invention is realized by the following technical scheme: the utility model provides a gradual change throttle formula buffer suitable for direction drop test, buffer include the mounting base, the top of mounting base is provided with the pneumatic cylinder, the pneumatic cylinder endotheca is equipped with a piston section of thick bamboo, be provided with the off-load awl along the axle center axial in the pneumatic cylinder, be provided with the support in the pneumatic cylinder, the middle part of support is provided with the orifice, there is the overflow clearance on the off-load awl and between the orifice cover is established, the bottom and the support of a piston section of thick bamboo are connected.
Specifically, the top of off-load awl is provided with the supporting seat, be provided with the boss on the supporting seat, the array is provided with the overflow hole on the supporting seat, the cover is equipped with reset spring on the boss, the top of piston cylinder be provided with the closing cap, the bottom of closing cap is provided with the cylinder platform, reset spring's a pot head is established on the cylinder platform.
Specifically, a sacrificial body is arranged on the top of the sealing cover.
Specifically, the upper end of the piston cylinder is circumferentially provided with a plurality of spray holes in an array mode, and the bottom of the hydraulic cylinder is provided with a valve communicated with the inside of the hydraulic cylinder.
Specifically, the lower extreme of piston cylinder is provided with two at least spacing bosss of annular, is provided with the annular seal groove on the spacing boss of annular, be provided with the sealing rubber ring in the annular seal groove and realize the sealed of piston cylinder and pneumatic cylinder, the top of pneumatic cylinder is provided with spacing lid and is used for restricting the removal extreme position of piston cylinder.
Specifically, the unloading cone is of a parabolic curved surface structure.
Specifically, the bottom of mounting base is provided with first direction rope spliced pole, all be provided with the centre bore on mounting base, pneumatic cylinder bottom, off-load awl, supporting seat, closing cap and the sacrificial body, be connected with the direction rope on the first direction rope spliced pole, the centre bore connection that the direction rope other end set up on passing mounting base, pneumatic cylinder, off-load awl, supporting seat and the closing cap in proper order falls the frame and connects.
The invention has the following advantages:
1. because the invention adopts the gradual change throttling type buffer device, the working principle is that the area of the throttling hole is changed from large to small according to a certain rule along with the change of the stroke: when the impact starts, the buffer speed is high, and the area of the throttling hole is large in matching; at the end of the damping, the speed is lower, matching a smaller orifice area, so that the amount of variation in damping force and damping speed remains substantially constant. The flow rate through the orifice is determined by the mass and velocity of the impinging moving body, and most of the impinging energy becomes heat as the liquid flows through the orifice, warming the damping medium water and then dissipating it into the air.
2. Honeycomb aluminium or foamed aluminum structure have been installed at this gradual change throttle formula hydraulic buffer device top to the impact peak value in the twinkling of an eye is contacted with hydraulic buffer device to the direction steelframe when cutting down the experiment increases the impact action time simultaneously, has reduced the mutual impact between the two, has prolonged part and hydraulic buffer device's life.
3. This gradual change throttle formula hydraulic buffer's off-load awl has adopted the circular cone curved surface of approximate parabola curved surface shape promptly the buffering head, simple structure, and easy processing enables the pressure variation in the buffer chamber very little moreover, and the buffering process is more steady, has avoided the acceleration sudden change that traditional buffer exists at buffering starting point and terminal point, leads to pneumatic cylinder structure to damage.
4. A large number of small holes are formed in the upper portion of a piston cylinder of the gradual-change throttling hydraulic buffer device, impact kinetic energy is taken away by spraying water flow through the spray holes when the device works, impact of a buffer medium on the inner wall of the piston cylinder is reduced, and meanwhile buffer efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a conventional gap throttling principle;
FIG. 2 is a schematic view of a conventional orifice throttling principle;
FIG. 3 is a speed and acceleration curve of a conventional throttling buffer device during buffering;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is an enlarged view of the structure at A in FIG. 4;
FIG. 6 is a damping force versus displacement curve for a 45m drop draft gear;
in the figure: 1-mounting base, 2-hydraulic cylinder, 3-piston cylinder, 4-unloading cone, 5-support, 6-throttling hole, 7-supporting seat, 8-reset spring, 9-limiting cover, 10-overflow hole, 11-annular limiting boss, 12-sacrificial body, 13-spraying hole, 14-sealing cover, 15-guide rope connecting column, 16-valve and 17-guide rope.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in fig. 4 to 6, a gradual change throttling type buffer device suitable for a guided drop test, the buffer device comprises a mounting base 1, a hydraulic cylinder 2 is arranged at the top of the mounting base 1, a piston cylinder 3 is sleeved in the hydraulic cylinder 2, an unloading cone 4 is axially arranged in the hydraulic cylinder 2 along the axis, a support 5 is arranged in the hydraulic cylinder 2, a throttling hole 6 is arranged in the middle of the support 5, the throttling hole 6 is sleeved on the unloading cone 4, an overflow gap exists between the throttling hole 6 and the unloading cone 4, and the bottom of the piston cylinder 3 is connected with the support 5. The buffer device of the embodiment is used for a drop experiment with a height of more than nine meters and is used for providing buffer for a component of the drop experiment, when the component drops to a height contacting with the buffer device from about 20 meters, the component has large weight and high speed, and the buffer effect can be achieved only by a mechanism with strong buffer capacity, the scheme preferably adopts a hydraulic buffer mode for buffering, the hydraulic cylinder 2 is filled with buffer medium before the experiment, the bottom of the unloading cone 4 is fixed at the bottom of the hydraulic cylinder 2, the unloading cone 4 adopts a parabolic curved surface structure, the diameter of the upper end of the unloading cone is smaller than that of the lower end, the side wall of the support 5 is tightly contacted with the inner side wall of the hydraulic cylinder 2, the upper end of the unloading cone 4 passes through the throttling hole 6 arranged in the middle of the support 5, when the component drops to contact with the buffer device and downwards press the piston cylinder 3, the piston cylinder 3 transmits, further, the support 5 is pressed downwards, when the support 5 is pressed downwards, the buffer medium is squeezed into the piston cylinder 3 through the throttle hole 6 when the support 5 is pressed downwards due to the gap for the buffer medium to overflow between the throttle hole 6 and the unloading cone 4, the buffer purpose is achieved, the piston cylinder 3 and the components continue to fall under the action of the buffer device until the speed is reduced to zero, because the unloading cone 4 of the buffer device adopts a parabolic curved surface structure which is a gradually-changed throttling buffer structure, the buffer device has the advantages that the pressure p in the buffer cavity is approximately constant in the whole buffer process, the motion of the piston cylinder 3 and the components in the buffer process is approximately uniform deceleration motion, the speed change and the energy consumption are uniform, the mutual impact between the piston cylinder and the components is reduced, the buffer process is stable, and the acceleration sudden change of the traditional buffer device at the buffer starting point and the end point is avoided, the hydraulic cylinder structure is damaged, and the working principle of the invention is that the area of the throttling hole 6 is changed from large to small according to a certain rule along with the change of the stroke because the gradual change throttling type buffer device is adopted: when the impact starts, the buffer speed is high and is matched with the area of the throttle hole 6; when the buffering is finished, the speed is lower and is matched with the area of the smaller throttle hole 6, so that the buffering force and the variation of the buffering speed are kept approximately unchanged, the flow rate flowing through the throttle hole 6 is determined by the mass and the speed of the impact moving body, most of impact energy is changed into heat when liquid flows through the throttle hole 6, the buffering medium water is heated and then is dissipated into air, and the buffering force changes along with displacement in the buffering process as shown in FIG. 6; the traditional variable-throttling hydraulic buffer device is mainly used for buffering a moving piston in a hydraulic cylinder, the structural principle is shown in figures 1 and 2, the buffer device is installed at the bottom of the hydraulic cylinder 2, the buffer stroke is short, the buffer energy is small, and the buffer device is not suitable for buffering objects with long stroke and large impulse in a drop test, meanwhile, the traditional variable-throttling buffer device is used for buffering at equal speed, no speed mutation exists, namely no hard impulse exists, but acceleration mutation exists at the buffer starting point and the buffer finishing point, as shown in figure 3, the problem of soft impulse exists, and the hydraulic cylinder structure is easily damaged.
Further, a supporting seat 7 is arranged at the top of the unloading cone 4, a boss is arranged on the supporting seat 7, overflow holes 10 are arranged on the supporting seat 7 in an array manner, a return spring 8 is sleeved on the boss, a sealing cover 14 is arranged at the top of the piston cylinder 3, the sealing cover 14 is fixed on the piston cylinder 3 through bolts, a cylindrical table is arranged at the bottom of the sealing cover 14, one end of the return spring 8 is sleeved on the cylindrical table, the supporting seat 7 is arranged at the top of the unloading cone 4, the unloading cone 4 is kept in a static state in the process of pressing down the piston cylinder 3, so the supporting seat 7 is also a static device, the return spring 8 is arranged between the sealing cover 14 and the supporting seat 7, the return spring 8 can be compressed in the process of pressing down the piston cylinder 3, a certain buffering effect is achieved, the piston cylinder 3 is mainly used for resetting, and when a component is separated from the buffering device after a test is completed, the piston cylinder 3 can automatically reset under the action of the reset spring 8, and is prepared for the next experiment.
Furthermore, a sacrificial body 12 is arranged at the top of the sealing cover 14, the sacrificial body 12 is of a rubber block or foamed aluminum structure and is used for reducing instant impact at the moment when the component is contacted with the buffer device in a test, so that mutual impact between the component and the buffer device is reduced, the service lives of the component and the buffer device are prolonged, and the component cannot rebound due to the adoption of foamed aluminum.
Furthermore, the upper end of the piston cylinder 3 is circumferentially provided with a plurality of spray holes 13 in an array mode, in the process that the piston cylinder 3 is pressed down, a buffer medium in the cylinder body of the hydraulic cylinder 2 is squeezed into the piston cylinder 3 through the orifice 6 and then is sprayed out from a large number of spray holes 13 in the wall of the piston cylinder 3, impact kinetic energy is taken away, impact of the buffer medium on the inner wall of the piston cylinder 3 is reduced, and meanwhile, the buffer efficiency is improved.
Furthermore, a valve 16 communicated with the inside of the hydraulic cylinder 2 is arranged at the bottom of the hydraulic cylinder 2, the valve 16 comprises a water inlet valve and a water outlet valve, before a test, the water outlet valve is closed firstly, then a buffer medium can be injected into the hydraulic cylinder 2 through the water inlet valve, the buffer medium can be water until the water overflows from the upper part of the hydraulic cylinder 2, the water inlet valve is closed, the buffer medium is tap water, the requirement on the sealing performance of a moving part of the device is lowered, the sealing structure is simplified, the development and use cost is saved, and meanwhile, the pollution to the environment is reduced.
Further, the lower extreme of piston cylinder 3 is provided with two at least annular spacing bosss 11, is provided with the annular seal groove on the annular spacing boss 11, be provided with the sealed rubber ring in the annular seal groove and realize piston cylinder 3 and pneumatic cylinder 2's sealed, the top of pneumatic cylinder 2 is provided with spacing lid 9 and is used for restricting the removal extreme position of piston cylinder 3.
Further, the unloading cone 4 is of a parabolic curved surface structure.
Further, the bottom of mounting base 1 is provided with direction rope spliced pole 15, all be provided with the centre bore on mounting base 1, 2 bottoms of pneumatic cylinder, off-load awl 4, supporting seat 7, closing cap 14 and the sacrificial body 12, be connected with direction rope 17 on the direction rope spliced pole 15, the centre bore that the direction rope 17 other end set up on passing mounting base 1, pneumatic cylinder 2, off-load awl 4, supporting seat 7 and the closing cap 14 in proper order is connected on the frame that falls, fixes direction rope 17 on buffer through foretell scheme, and its work can not receive the influence of part and buffer contact buffering.
The working process of the invention is as follows: before the test, the water outlet valve is closed, water is injected into the hydraulic cylinder 2 through the water inlet valve until the water overflows from the upper part of the hydraulic cylinder 2, and the water inlet valve is closed. Meanwhile, in the water injection process, under the action of water, the piston cylinder 3 moves upwards to the top, and at the moment, the hydraulic buffer device is in a working state. During the test, the part takes the test product to slide downwards along the guide rope 17 from the initial test height, and when the part falls to the low height, the part is separated from the test product and then continuously falls until the part acts on the buffer device under the control of the automatic control system. In the initial stage of action, the sacrifice body 12 deforms and absorbs energy, so that the peak value of collision impact between the part and the buffer device is reduced, and the duration time of the impact action is prolonged; in the later stage of action, the piston cylinder 3 and the components continue to fall under the action of the buffer until the speed is reduced to zero, and during the falling process, water in the cylinder body of the hydraulic cylinder 2 is squeezed into the piston cylinder 3 through the throttle hole 6 and then is sprayed out from a large number of spray holes 13 on the piston cylinder 3. Because this hydraulic buffer has adopted gradual change throttle formula buffer structure, its characteristics are that the pressure p in the buffer chamber is approximate unchangeable in whole buffering process for the motion of piston cylinder and direction steel frame at buffering process is approximate to even deceleration motion, and its velocity variation and energy consumption are more even, have reduced the mutual impact between the two, make buffering process steady, buffering process buffering power as the displacement change calculation result that fig. 5 demonstrates, its state whereabouts at the uniform velocity of keeping in earlier stage, the experimental condition who adopts in the picture is part weight: 2100kg, buffer height: 5m, effective height of part falling, distance from the upper surface of the sacrifice body: 45 m.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (8)
1. The utility model provides a gradual change throttle formula buffer suitable for direction drop test which characterized in that: buffer include mounting base (1), the top of mounting base (1) is provided with pneumatic cylinder (2), pneumatic cylinder (2) endotheca is equipped with piston cylinder (3), be provided with off-load awl (4) along the axle center axial in pneumatic cylinder (2), be provided with support (5) in pneumatic cylinder (2), the middle part of supporting (5) is provided with orifice (6), there is the overflow clearance orifice (6) cover establish on off-load awl (4) and between, the bottom and the support (5) of piston cylinder (3) are connected.
2. The gradual throttling cushioning device suitable for the guided drop test of claim 1, wherein: the unloading cone is characterized in that a supporting seat (7) is arranged at the top of the unloading cone (4), a boss is arranged on the supporting seat (7), overflow holes (10) are formed in the supporting seat (7) in an array mode, a reset spring (8) is sleeved on the boss, a sealing cover (14) is arranged at the top of the piston cylinder (3), a cylindrical table is arranged at the bottom of the sealing cover (14), and a sleeve of the reset spring (8) is arranged on the cylindrical table.
3. The gradual throttling cushioning device suitable for the guided drop test of claim 2, wherein: the top of the cover (14) is provided with a sacrificial body (12).
4. The gradual throttling cushioning device suitable for the guided drop test of claim 2, wherein: the upper end of the piston cylinder (3) is circumferentially provided with a plurality of spray holes (13).
5. The gradual throttling cushioning device suitable for the guided drop test of claim 2, wherein: and a valve (16) communicated with the interior of the hydraulic cylinder (2) is arranged at the bottom of the hydraulic cylinder (2).
6. The gradual throttling cushioning device suitable for the guided drop test of claim 2, wherein: the lower extreme of piston cylinder (3) is provided with two at least annular spacing bosss (11), is provided with the annular seal groove on the annular spacing boss (11), be provided with the sealed rubber ring in the annular seal groove and realize the sealed of piston cylinder (3) and pneumatic cylinder (2), the top of pneumatic cylinder (2) is provided with the removal extreme position that spacing lid (9) are used for restricting piston cylinder (3).
7. The gradual throttling cushioning device suitable for the guided drop test of claim 2, wherein: the unloading cone (4) is of a parabolic curved surface structure.
8. The gradual throttling cushioning device suitable for the guided drop test of claim 3, wherein: the bottom of mounting base (1) is provided with direction rope spliced pole (15), all be provided with the centre bore on mounting base (1), pneumatic cylinder (2) bottom, off-load awl (4), supporting seat (7), closing cap (14) and sacrificial body (12), be connected with direction rope (17) on direction rope spliced pole (15), the centre bore that sets up on mounting base (1), pneumatic cylinder (2), off-load awl (4), supporting seat (7) and closing cap (14) is passed in proper order to direction rope (17) other end is connected on the frame that falls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010339612.9A CN111322344A (en) | 2020-04-26 | 2020-04-26 | Gradual change throttle formula buffer suitable for direction drop test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010339612.9A CN111322344A (en) | 2020-04-26 | 2020-04-26 | Gradual change throttle formula buffer suitable for direction drop test |
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| CN111322344A true CN111322344A (en) | 2020-06-23 |
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| CN202010339612.9A Pending CN111322344A (en) | 2020-04-26 | 2020-04-26 | Gradual change throttle formula buffer suitable for direction drop test |
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Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3508255A1 (en) * | 1985-03-08 | 1986-09-25 | Horst Dipl.-Ing. 4005 Meerbusch Knäbel | Method and device for functional, performance and/or resistance testing of delay elements, for example shock absorbers, springs or the like |
| DE19736141A1 (en) * | 1997-08-20 | 1999-03-04 | Hydraulik Liftsysteme Walter M | Hydraulic cylinder stable against bending |
| JP2003146554A (en) * | 2001-11-05 | 2003-05-21 | Mitsubishi Electric Corp | Multi-stage hydraulic shock absorber |
| CN1613741A (en) * | 2004-12-02 | 2005-05-11 | 上海交通大学 | Small-size hydraulic buffer for elevator |
| DE102005049852A1 (en) * | 2005-05-03 | 2006-11-09 | Liebherr-Aerospace Lindenberg Gmbh | End position damper for hydraulic cylinder has plate which is movably installed on piston in such way that it is in advance of piston movement, and when lying against bottom of cylinder at least partially covers drain openings |
| CN201121618Y (en) * | 2007-03-21 | 2008-09-24 | 北京航天发射技术研究所 | Normal and inverse cavity throttling buffering multilevel hydraulic cylinder |
| CN201217591Y (en) * | 2008-05-08 | 2009-04-08 | 河北东方富达机械有限公司 | Oil hydraulic buffer |
| JP2011047728A (en) * | 2009-08-26 | 2011-03-10 | Kayaba System Machinery Kk | Drop testing device |
| CN201885863U (en) * | 2010-11-19 | 2011-06-29 | 锦州锦恒汽车安全***有限公司 | Drop impact tester for supplementary restraint systems |
| CN202164000U (en) * | 2011-07-04 | 2012-03-14 | 河北东方富达机械有限公司 | Oil buffer |
| CN202936056U (en) * | 2012-11-01 | 2013-05-15 | 河北东方富达机械有限公司 | Oil pressure buffer |
| CN104315066A (en) * | 2010-03-02 | 2015-01-28 | 日立汽车***株式会社 | Shock absorber |
| KR101514931B1 (en) * | 2014-12-10 | 2015-04-23 | 서울대학교산학협력단 | Drop Test Device for Sloshing Impact on LNG CCS |
| CN105840585A (en) * | 2016-05-24 | 2016-08-10 | 中国工程物理研究院总体工程研究所 | Oil supply hydraulic adjusting device for piston cooling nozzle performance experiment bench |
| RU165842U1 (en) * | 2015-12-22 | 2016-11-10 | Общество С Ограниченной Ответственностью "Научно-Производственное Объединение "Ростар" | HYDRAULIC SHOCK ABSORBER |
| CN207330037U (en) * | 2017-09-26 | 2018-05-08 | 河北东方富达机械有限公司 | A kind of buffer of elevator |
| CN208000187U (en) * | 2018-04-09 | 2018-10-23 | 北京市环境卫生设计科学研究所 | Dustbin drop shutter test detection device |
| CN109506870A (en) * | 2018-11-06 | 2019-03-22 | 西南交通大学 | A kind of cable type guiding orientation percussion mechanism for rock-fall protection system sinker dynamic test |
| CN209705158U (en) * | 2019-03-29 | 2019-11-29 | 宁波金恒汽车零部件有限公司 | Multi-runner type guider |
| CN111397827A (en) * | 2020-04-26 | 2020-07-10 | 中国工程物理研究院总体工程研究所 | Guide drop test system and method |
| CN212080015U (en) * | 2020-04-26 | 2020-12-04 | 中国工程物理研究院总体工程研究所 | Gradual change throttle formula buffer suitable for direction drop test |
-
2020
- 2020-04-26 CN CN202010339612.9A patent/CN111322344A/en active Pending
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3508255A1 (en) * | 1985-03-08 | 1986-09-25 | Horst Dipl.-Ing. 4005 Meerbusch Knäbel | Method and device for functional, performance and/or resistance testing of delay elements, for example shock absorbers, springs or the like |
| DE19736141A1 (en) * | 1997-08-20 | 1999-03-04 | Hydraulik Liftsysteme Walter M | Hydraulic cylinder stable against bending |
| JP2003146554A (en) * | 2001-11-05 | 2003-05-21 | Mitsubishi Electric Corp | Multi-stage hydraulic shock absorber |
| CN1613741A (en) * | 2004-12-02 | 2005-05-11 | 上海交通大学 | Small-size hydraulic buffer for elevator |
| DE102005049852A1 (en) * | 2005-05-03 | 2006-11-09 | Liebherr-Aerospace Lindenberg Gmbh | End position damper for hydraulic cylinder has plate which is movably installed on piston in such way that it is in advance of piston movement, and when lying against bottom of cylinder at least partially covers drain openings |
| CN201121618Y (en) * | 2007-03-21 | 2008-09-24 | 北京航天发射技术研究所 | Normal and inverse cavity throttling buffering multilevel hydraulic cylinder |
| CN201217591Y (en) * | 2008-05-08 | 2009-04-08 | 河北东方富达机械有限公司 | Oil hydraulic buffer |
| JP2011047728A (en) * | 2009-08-26 | 2011-03-10 | Kayaba System Machinery Kk | Drop testing device |
| CN104315066A (en) * | 2010-03-02 | 2015-01-28 | 日立汽车***株式会社 | Shock absorber |
| CN201885863U (en) * | 2010-11-19 | 2011-06-29 | 锦州锦恒汽车安全***有限公司 | Drop impact tester for supplementary restraint systems |
| CN202164000U (en) * | 2011-07-04 | 2012-03-14 | 河北东方富达机械有限公司 | Oil buffer |
| CN202936056U (en) * | 2012-11-01 | 2013-05-15 | 河北东方富达机械有限公司 | Oil pressure buffer |
| KR101514931B1 (en) * | 2014-12-10 | 2015-04-23 | 서울대학교산학협력단 | Drop Test Device for Sloshing Impact on LNG CCS |
| RU165842U1 (en) * | 2015-12-22 | 2016-11-10 | Общество С Ограниченной Ответственностью "Научно-Производственное Объединение "Ростар" | HYDRAULIC SHOCK ABSORBER |
| CN105840585A (en) * | 2016-05-24 | 2016-08-10 | 中国工程物理研究院总体工程研究所 | Oil supply hydraulic adjusting device for piston cooling nozzle performance experiment bench |
| CN207330037U (en) * | 2017-09-26 | 2018-05-08 | 河北东方富达机械有限公司 | A kind of buffer of elevator |
| CN208000187U (en) * | 2018-04-09 | 2018-10-23 | 北京市环境卫生设计科学研究所 | Dustbin drop shutter test detection device |
| CN109506870A (en) * | 2018-11-06 | 2019-03-22 | 西南交通大学 | A kind of cable type guiding orientation percussion mechanism for rock-fall protection system sinker dynamic test |
| CN209705158U (en) * | 2019-03-29 | 2019-11-29 | 宁波金恒汽车零部件有限公司 | Multi-runner type guider |
| CN111397827A (en) * | 2020-04-26 | 2020-07-10 | 中国工程物理研究院总体工程研究所 | Guide drop test system and method |
| CN212080015U (en) * | 2020-04-26 | 2020-12-04 | 中国工程物理研究院总体工程研究所 | Gradual change throttle formula buffer suitable for direction drop test |
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