CN112161013A - Creeping expansion ring type energy dissipation and shock absorption device - Google Patents
Creeping expansion ring type energy dissipation and shock absorption device Download PDFInfo
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- CN112161013A CN112161013A CN202010976068.9A CN202010976068A CN112161013A CN 112161013 A CN112161013 A CN 112161013A CN 202010976068 A CN202010976068 A CN 202010976068A CN 112161013 A CN112161013 A CN 112161013A
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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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
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Abstract
The invention discloses a peristaltic expansion ring type energy dissipation and shock absorption device, which comprises variable cross-section expansion rings with circular ring connectors arranged at two ends and a plurality of variable cross-section expansion rings which are arranged in the middle and are separated from each other and symmetrically distributed, wherein a layer of polytetrafluoroethylene cushion is wrapped on an inner facing surface of each expansion ring, self-resetting hydraulic pumps are arranged at two sides in each expansion ring, a double-cone symmetrical cone is arranged in the middle of each adjacent expansion ring, the expansion rings are connected together through cones and connecting rods and are provided with corresponding limiting rods and limiting grooves, so that the peristaltic force transmission of the whole device under the action of earthquake and wind is ensured. The device controls the deformation of the expansion ring in the elastic range, ensures the sustainable utilization of the expansion ring, reduces the material consumption, has a corresponding self-resetting mechanism, and can effectively resist wind acting force and large, medium and small earthquakes.
Description
Technical Field
The invention relates to a peristaltic expansion ring type energy dissipation and shock absorption device, and belongs to the field of energy dissipation and shock absorption in the field of machinery and buildings.
Background
The return and landing are key technologies of manned space flight and are final signs of the success or failure of manned space flight tasks. When the re-entry capsule lands on land, the stable descending speed of the parachute is generally 6m/s-8 m/s. If the returning capsule directly lands at the stable speed reduced by the parachute, larger impact overload is still generated, and the astronaut is damaged. In order to ensure the safety of astronauts under various emergency return and landing conditions of the re-entry capsule, various landing buffer devices are required to be comprehensively adopted on the re-entry capsule according to a redundancy design concept, so that the whole system is ensured to have high safety under partial fault working conditions. The reverse-thrust engine is a commonly used active buffer device, the seat buffer is a typical passive in-cabin buffer device, and for example, expansion ring type seat buffers are used for buffering landing impact overload of an alliance TM airship and a China 'Shenzhou' airship.
The expansion ring type buffer utilizes expansion deformation of the metal thin-walled tube to buffer and absorb energy, and has the advantages of easy processing, convenient adjustment, stable work, wide application range and the like compared with other types of buffers.
The main parts of the expanding ring type buffer comprise a plurality of expanding rings and a conical ring. The expansion ring is connected with the seat framework through a movable sleeve, a connecting slide block and the like, and the conical ring is connected with the cabin body through a rod column and the like. The inner diameter of each section of the expander is the same, and different buffering forces are provided by changing the wall thickness. When the external input impact load exceeds the starting threshold force of the expansion ring, the buffer starts to generate a stroke, the expansion ring sequentially generates expanding deformation through the conical ring, and the external impact energy is converted into the deformation energy of the expansion ring material and the friction heat energy between the expansion ring and the conical ring.
Disclosure of Invention
The invention aims to provide a creeping expansion ring type energy dissipation and shock absorption device which can be self-repaired and can be continuously utilized.
According to the invention, the creeping expansion ring type energy dissipation and shock absorption device mainly absorbs impact energy by means of elastic deformation of a metal material under the action of an external force and friction energy dissipation between a cone and an expansion ring. The energy absorption component is formed by connecting the cones in series with the variable cross-section expansion rings connected with the cones, the cones enter the expansion rings in the buffering process, the expansion rings are expanded and deformed, and rub and absorb energy with the expansion rings, so that the energy is absorbed, and the device can be restored by the hydraulic pump after extrusion deformation to meet the characteristics of self repair, sustainable utilization, cost saving and the like.
The invention provides a peristaltic expansion ring type energy dissipation and shock absorption device, which comprises variable cross-section expansion rings with circular ring connectors arranged at two ends and a plurality of variable cross-section expansion rings which are arranged in the middle and are separated from each other and symmetrically distributed, wherein a layer of polytetrafluoroethylene pad is wrapped on an inner facing surface of each expansion ring, reset hydraulic pumps are arranged at the left side and the right side in each expansion ring, a double-head symmetrical cone is arranged in the middle of each adjacent expansion ring, and the expansion rings are connected together through the double-head symmetrical cones and a connecting body and are provided with corresponding limiting rods and limiting grooves, so that the peristaltic force transmission of the whole device under the action of earthquake and wind is ensured.
The above technical solution is further explained as follows:
in the creeping expansion ring type energy dissipation and shock absorption device, two ends are respectively provided with a circular ring, the circular rings are used for being connected with other components, the circular rings are respectively connected with the expansion rings, and a hydraulic pump is arranged in the expansion rings.
In the device, the expansion ring comprises a plurality of expansion rings, the expansion rings and the double conical heads are symmetrically arranged in a fit manner, the upper side and the lower side of the middle part are respectively provided with the limiting grooves or the fixing grooves, and the depth of the fixing grooves, the depth of the limiting grooves and the length of the fixing grooves are determined to be within a reasonable limit value according to the tensile compression test result, the length of the conical bodies and the movable range, so that the conical heads can be prevented from being separated from the expansion rings, and the creeping of energy consumption and force transmission can be ensured.
Among the above-mentioned device, the connector is the loop configuration, comprises dead lever, crooked connecting rod, horizontal connecting rod, gag lever post, and in the dead lever of connector inserted the fixed slot of expander, the gag lever post inserted the spacing inslot of expander, the stiff end is because inserting the fixed slot and being linked into whole unable removal with the expander, and the sliding end is at the spacing inslot, because the restriction of spacing groove can only remove in the spacing inslot.
In the device, the connecting body is arranged between the adjacent expansion rings, the expansion rings are made of aluminum or super-elastic steel and have corresponding rigidity, the deformation of the expansion rings is controlled within the elastic deformation range, the connecting rod is made of aluminum or the like with enough rigidity, the depth and the length of the limiting groove are determined within a reasonable limit value according to a test result, so that the conical head can be prevented from being separated from the expansion rings, and the creeping of energy consumption and force transmission can be ensured.
In the above device, the pressure of the contact surface is large when the expander and the cone move relatively, in this case, if dry friction is adopted on the contact surface of the expander and the cone, phenomena such as adhesion, scratch and the like are easy to occur, so that the frictional resistance is further increased, and fluctuation of buffering is caused. Therefore, lubrication measures must be taken to ensure stability of the friction coefficient. Analysis and experiments confirm that the problem is solved by attaching and wrapping a polytetrafluoroethylene pad on the inner surface of the expansion ring. After the expansion ring lubrication mode is determined, the combined buffer force of the expansion ring and the cone angle can be calculated according to a theoretical formula, and the cone angle of the cone is selected to be a proper angle within the range of 7-15 degrees in combination with the limitations of processing manufacturability and assembly space. In the device, the hydraulic pump supplies oil through the oil pump to move the piston, so that the reset operation of the device is realized.
In the device, a sensor is arranged at the variable cross section of the expansion ring, and when the conical head is in contact with the sensor, an induction signal is generated to reset the device. Make expander and cone reset through the hydraulic pump, guarantee need not replace the expander, paste the sensor in variable cross section department, indicate promptly when the cone touches the sensor that the work that resets should carry out, accomplish sustainable utilization through resetting.
The invention has the beneficial effects that:
the device controls the deformation of the expansion ring in the elastic range, ensures the sustainable utilization of the expansion ring, reduces the material consumption, has a corresponding self-resetting mechanism, and can effectively resist wind acting force and large, medium and small earthquakes.
Drawings
FIG. 1: the overall structure schematic diagram of the peristaltic expansion ring type energy dissipation and shock absorption device is shown;
FIG. 2: fig. 1 is a schematic view of the overall structure of the peristaltic expansion ring type energy dissipation and shock absorption device after deformation;
FIG. 3: enlarging the single expansion ring unit before and after elastic deformation;
FIG. 4: the structure schematic diagram of the connecting rod;
FIG. 5: the structure of the hydraulic pump is shown schematically.
In the figure: 1-expansion ring, 2-cone, 3-fixed groove, 4-limiting groove, 5-connector, 5-1-fixed rod, 5-2-bending connecting rod, 5-3-horizontal connecting rod, 5-4-limiting rod, 6-ring, 7-hydraulic pump, 7-1-piston, 7-2-oil cylinder, 7-3-oil pipe, 7-4-oil pump, 8-polytetrafluoroethylene pad, and 9-variable cross section.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1:
the embodiment provides a creeping expansion ring type energy dissipation and shock absorption device which comprises variable cross-section expansion rings 1 with circular ring connectors arranged at two ends and a plurality of variable cross-section expansion rings which are arranged in the middle and are separated from each other and symmetrically distributed, wherein a layer of polytetrafluoroethylene pad 8 is wrapped on an inner facing surface of each expansion ring 1, reset hydraulic pumps 7 are arranged on the left side and the right side in each expansion ring, a double-cone symmetrical cone 2 is arranged in the middle of each adjacent expansion ring, and the expansion rings 1 are connected together through the double-cone symmetrical cone 2 and a connecting body 5 and are provided with corresponding limiting rods 5-4 and limiting grooves 4, so that creeping force transmission of the whole device under the action of earthquake and wind is guaranteed.
The above technical solution is further explained as follows:
in the peristaltic expansion ring type energy dissipation and shock absorption device, two ends are respectively provided with a circular ring 6, the circular rings 6 are used for being connected with other components, the circular rings 6 are respectively connected with the expansion rings, and a hydraulic pump 7 is arranged in the expansion ring 1.
In the device, the expansion ring 1 comprises a plurality of expansion rings, the expansion rings are attached to the double-cone symmetrical cone 2 in the middle of the expansion ring 1 and are arranged, the upper side and the lower side of the middle of the expansion ring 1 are respectively provided with the limiting grooves 4 or the fixing grooves 3, the depth of the limiting grooves 4 and the length of the fixing grooves are determined to be within a reasonable limit value according to the tensile compression test result, the length of the cone and the movable range, and therefore the expansion ring 1 can be prevented from being separated from the cone 2, and the creeping of energy consumption and force transmission.
In the device, the connector 5 is of an annular structure and comprises a fixed rod 5-1, a bent connecting rod 5-2, a horizontal connecting rod 5-3 and a limiting rod 5-4, the fixed rod 5-1 of the connector is inserted into the fixed groove 3 of the expansion ring, the limiting rod 5-4 is inserted into the limiting groove 4 of the expansion ring, the fixed end cannot move as the fixed end is connected with the expansion ring 1 into a whole by inserting the fixed groove 3, and the sliding end is in the limiting groove 4 and can only move in the limiting groove 4 due to the limitation of the limiting groove 4.
In the device, the connecting body is arranged between the adjacent expansion rings, the expansion rings 1 are made of aluminum or super-elastic steel and have corresponding rigidity, the deformation of the expansion rings is controlled within the elastic deformation range, the connecting rod is made of aluminum or the like with enough rigidity, the depth and the length of the limiting groove are determined within a reasonable limit value according to a test result, so that the conical head can be prevented from being separated from the expansion rings, and the creeping of energy consumption and force transmission can be ensured.
In the above-described apparatus, the unit pressure of the contact surface is large when the expander 1 and the cone 2 move relatively, and in this case, if dry friction is adopted for the contact surface of the expander and the cone, the phenomena such as adhesion and scratch are likely to occur, so that the frictional resistance is further increased, and fluctuation of the cushion is caused. Therefore, lubrication measures must be taken to ensure stability of the friction coefficient. Analysis and testing have confirmed that this problem is solved by attaching a layer of teflon pad 8 to the inner facing of the expander. After the expansion ring lubrication mode is determined, the combined buffer force of the expansion ring and the cone angle can be calculated according to a theoretical formula, and the cone angle of the cone is selected within the range of a proper angle of 7-15 degrees in combination with the limitations of processing manufacturability and assembly space.
In the device, the hydraulic pump 7 supplies oil through the oil pump 7-4 to move the piston 7-1, so that the resetting operation of the device is realized. Fig. 5 shows the structure of the hydraulic pump.
In the device, a strain gauge is arranged at the variable cross section 9 of the expansion ring, and when the conical head 2 is in contact with the strain gauge, an induction signal is generated to reset the device. Make the expander 1 and the cone 2 reset through hydraulic pump 7, guarantee not need to replace expander 1, paste the foil gage in variable cross section department 9, indicate promptly when cone 1 touches the foil gage that should reset work, accomplish sustainable utilization through reseing.
The operating state of the peristaltic expansion ring type energy dissipation and shock absorption device provided by the invention is as follows:
when earthquake occurs to exert pressure, the whole device is symmetrical, half of the device is taken for explanation, firstly, the expansion ring 1 moves towards the cone 2 due to earthquake force, two kinds of energy consumption (the friction energy consumption between the cone head and the polytetrafluoroethylene cushion is realized, and the expansion deformation energy consumption in the expansion ring elastic range of the contact surface is realized), along with the continuous increase of the moving distance of the expansion ring 1 towards the cone 2, the expansion ring does not generate relative displacement until the expansion ring moves to the variable cross section 9, at the moment, the expansion ring 1 can push the expansion ring 1 to continuously move through the connecting body 5 due to enough rigidity of the connecting rod, at the moment, the expansion ring 1 and the cone 2 generate relative displacement, simultaneously, the same two kinds of energy consumption are realized on the contact surface, when the pushing reaches the limit value of the next limit groove 4, the expansion ring 1 can continuously push the expansion ring 1 through the connecting body 5, and the analogy is carried out, if bidirectional pressure is generated on the device in the earthquake occurring process, the device can generate a wave-wave energy dissipation mechanism similar to the creeping of earthworms from two ends, plays the role of energy dissipation and shock absorption, and can control the size of the limiting hole and the number of the expansion rings through a standard displacement limit value, so that the device can always be in an energy dissipation stage.
When the earthquake takes place the pulling force effect and does the time, at first the expander 1 can be because earthquake power removes to the direction of keeping away from cone 2, and until removing the limit value that reaches the spacing groove, expander 1 can take place to remove to cone 2 direction through 5 pulling second section expanders of connector, and second section expander this moment can take place relative displacement with cone 2, leads to second section expander and cone 2 contact surface to have taken place two kinds of power consumptions: firstly, the friction between the cone head and the polytetrafluoroethylene pad consumes energy, secondly, the expansion deformation energy consumption of the contact surface in the expansion ring elastic range is increased along with the distance of the expansion ring 1 departing from the cone 2, because of the limitation of the next limiting groove and the influence of the variable cross section in the figure, the relative displacement between the second expansion ring and the cone 2 can not occur any more, at the moment, the second expansion ring can pull the third expansion ring to move continuously through the connecting body, at the moment, the third expansion ring can generate relative displacement with the second cone, and simultaneously, the contact surface generates the same two energy consumptions, if bidirectional tension is generated on the device in the earthquake occurrence process, the device can generate a wave-wave energy dissipation mechanism from two ends, which is similar to the creeping of earthworms, thereby playing the roles of energy dissipation and shock absorption, the size of the limiting hole and the number of the expansion rings can be controlled through a standard displacement limiting value, so that the device can always be in an energy consumption stage.
The reset mechanism is as follows:
the hydraulic pump 7 works by adopting a double-acting cylinder, and pumps oil into the cylinder by using an oil pump according to the Pascal law so as to push the piston to move, the left side and the right side are both closed cavities, the oil is pumped to the left side, the piston moves to the right side, the oil is pumped to the right side, and the piston moves to the left side, so that the reciprocating motion of the piston is realized. A strain gauge is arranged at the variable cross section of the expansion ring, when a conical head is contacted with the strain gauge, an induction signal is generated, namely, the device needs to be reset, if the device is in a normal condition or a slight shock condition, the device is reset periodically, and the device can be reset once every half year; if the earthquake of medium or large size occurs, the resetting is carried out in time. Through the reciprocating motion of the hydraulic pump piston, the hydraulic pumps on the two sides in the expansion ring can realize resetting by pushing the cone through the piston.
Claims (9)
1. The utility model provides a wriggling type expander formula energy dissipation damping device which characterized in that: the device comprises variable cross-section expansion rings with circular ring interfaces and a plurality of variable cross-section expansion rings which are arranged at two ends and are separated from each other and symmetrically distributed in the middle, wherein a layer of polytetrafluoroethylene pad is arranged in each expansion ring, reset hydraulic pumps are arranged at the left side and the right side in each expansion ring, a double-cone symmetrical cone is arranged in the middle of each adjacent expansion ring, the expansion rings are connected with a connector through the double-cone symmetrical cones and are provided with corresponding limiting rods and limiting grooves, and accordingly the creeping force transfer of the whole device under the action of earthquake and wind is guaranteed.
2. The peristaltic-type expanding ring-type energy-dissipating and shock-absorbing device as claimed in claim 1, wherein: the two ends of the expansion ring are respectively provided with a circular ring for connecting other parts, the circular rings are respectively connected with the expansion ring, and a hydraulic cylinder is arranged in the expansion ring.
3. The peristaltic-type expanding ring-type energy-dissipating and shock-absorbing device as claimed in claim 1, wherein: the expansion ring comprises a plurality of expansion rings, the middle part of each expansion ring is attached to the symmetrical cone of the double-cone head, and the upper side and the lower side of the middle part of each expansion ring are respectively provided with a limiting groove or a fixing groove.
4. The peristaltic-type expanding ring-type energy-dissipating and shock-absorbing device as claimed in claim 1, wherein: the connector is the loop configuration, comprises dead lever, crooked connecting rod, horizontal connecting rod, gag lever post, and in the dead lever of connector inserted the fixed slot of expander, the gag lever post of connector inserted the spacing inslot of expander, and the stiff end is because inserting the fixed slot and the expander is linked into whole unable removal, and the slip end is at spacing inslot, and the restriction in restricted position groove can only remove in the spacing inslot.
5. The peristaltic-type expanding ring-type energy-dissipating and shock-absorbing device as claimed in claim 1, wherein: the expansion ring is made of aluminum or super-elastic steel, has rigidity and ensures that the deformation of the expansion ring is controlled within an elastic deformation range; the connecting rod is made of rigid aluminum.
6. The peristaltic-type expanding ring-type energy-dissipating and shock-absorbing device as claimed in claim 1, wherein: a layer of polytetrafluoroethylene pad is attached and wrapped on the inner surface of the expansion ring.
7. The peristaltic-type expanding ring-type energy-dissipating and shock-absorbing device as claimed in claim 1, wherein: the taper angle of the double-taper-head symmetrical cone is in the range of 7-15 degrees.
8. The peristaltic-type expanding ring-type energy-dissipating and shock-absorbing device as claimed in claim 1, wherein: the hydraulic pump supplies oil through the oil pump to move the piston, so that the resetting operation of the device is realized.
9. The peristaltic-type expanding ring-type energy-dissipating and shock-absorbing device as claimed in claim 1, wherein: the strain gauge is arranged at the variable cross section of the expansion ring, and when the conical head is in contact with the strain gauge, a sensing signal is generated to reset the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976068.9A CN112161013B (en) | 2020-09-16 | 2020-09-16 | Creeping expansion ring type energy dissipation and shock absorption device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976068.9A CN112161013B (en) | 2020-09-16 | 2020-09-16 | Creeping expansion ring type energy dissipation and shock absorption device |
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| Publication Number | Publication Date |
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| CN112161013A true CN112161013A (en) | 2021-01-01 |
| CN112161013B CN112161013B (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010976068.9A Active CN112161013B (en) | 2020-09-16 | 2020-09-16 | Creeping expansion ring type energy dissipation and shock absorption device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647610A (en) * | 2021-01-21 | 2021-04-13 | 太原理工大学 | Assembled bamboo joint type energy dissipation and shock absorption device and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3103416A1 (en) * | 1981-02-02 | 1982-09-02 | Ringfeder Gmbh, 4150 Krefeld | Device for the resilient absorption of forces, in particular for a central buffer coupling of rail vehicles |
| CN101280973A (en) * | 2008-04-21 | 2008-10-08 | 西安交通大学 | Gaseous supersonic speed heating device and heating method thereof |
| FR2951029A1 (en) * | 2009-10-01 | 2011-04-08 | Peugeot Citroen Automobiles Sa | Electric energy storage module e.g. lithium-ion battery module, for electric/hybrid vehicle, has case including upper surface or lower surface supporting face of storage element and forming recess with respect to thickness of case |
| CN103291797A (en) * | 2013-03-15 | 2013-09-11 | 尹学军 | Friction damper |
| CN211285977U (en) * | 2019-10-16 | 2020-08-18 | 西安理工大学 | Tapered weakening beam column joint for high-strength steel beam flange |
-
2020
- 2020-09-16 CN CN202010976068.9A patent/CN112161013B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3103416A1 (en) * | 1981-02-02 | 1982-09-02 | Ringfeder Gmbh, 4150 Krefeld | Device for the resilient absorption of forces, in particular for a central buffer coupling of rail vehicles |
| CN101280973A (en) * | 2008-04-21 | 2008-10-08 | 西安交通大学 | Gaseous supersonic speed heating device and heating method thereof |
| FR2951029A1 (en) * | 2009-10-01 | 2011-04-08 | Peugeot Citroen Automobiles Sa | Electric energy storage module e.g. lithium-ion battery module, for electric/hybrid vehicle, has case including upper surface or lower surface supporting face of storage element and forming recess with respect to thickness of case |
| CN103291797A (en) * | 2013-03-15 | 2013-09-11 | 尹学军 | Friction damper |
| CN211285977U (en) * | 2019-10-16 | 2020-08-18 | 西安理工大学 | Tapered weakening beam column joint for high-strength steel beam flange |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647610A (en) * | 2021-01-21 | 2021-04-13 | 太原理工大学 | Assembled bamboo joint type energy dissipation and shock absorption device and using method thereof |
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| CN112161013B (en) | 2022-04-12 |
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