WO2022101945A1 - Device for the insulation of industrial equipment, structures and civil infrastructures based on reticular truss modules - Google Patents
Device for the insulation of industrial equipment, structures and civil infrastructures based on reticular truss modules Download PDFInfo
- Publication number
- WO2022101945A1 WO2022101945A1 PCT/IT2021/050360 IT2021050360W WO2022101945A1 WO 2022101945 A1 WO2022101945 A1 WO 2022101945A1 IT 2021050360 W IT2021050360 W IT 2021050360W WO 2022101945 A1 WO2022101945 A1 WO 2022101945A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- damping
- connecting rods
- isolating
- plate
- mass
- Prior art date
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 7
- 238000013016 damping Methods 0.000 claims abstract description 32
- 239000013536 elastomeric material Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 230000036316 preload Effects 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 239000012212 insulator Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
Definitions
- the dissipative capacity is delegated to metal alloy elements (for example steel, lead, etc.) immersed within neoprene blocks.
- the metal element through a shear deformation of the insulator mostly consisting of said neoprene, is able to dissipate energy through its own yield, giving the insulator the dissipative capacity.
- the method provides for obtaining said insulation and damping by means of hysteresis cycles resulting from deformation of elements in elastomeric material interposed between the supported mass and the support , and is characteri zed by the fact of isolating and damping the vibrations that cause reciprocal sliding between said mass supported and said support through axial deformations of said elements in elastomeric material , said damping and insulation being obtained by means of the device according to the invention .
- the connecting rods constitute pyramid-shaped trusses , in which the connecting rods themselves are positioned along the lateral edges of said pyramid .
- the trellis is characteri zed by its initial height .
- FIGS. 5 and 6 show two possible embodiments of the elastic damper element.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combustion & Propulsion (AREA)
- Vibration Prevention Devices (AREA)
- Road Paving Structures (AREA)
- Revetment (AREA)
- Sewage (AREA)
Abstract
A device (1) and a method for isolating and damping a supported mass (3b), from vibrations deriving from the support (2b) or from the mass itself, are described; the device (1) comprises: a lower plate (2) integral with a support (2b); an upper plate (3) integral with a mass (3b) to be insulated and damped; damping and insulating means (4, 5, 20) interposed between said lower plate (2) and upper plate (3); in which said damping and insulating means (4, 5, 20) comprise elements made of elastomeric material, able to perform the function of insulation and damping through repeated deformations and consequent hysteresis.
Description
DEVICE FOR THE INSULATION OF INDUSTRIAL EQUIPMENT , STRUCTURES AND CIVIL INFRASTRUCTURES BASED ON RETICULAR TRUSS MODULES
The present invention refers to a device suitable for isolating and damping a supported mass , from vibrations deriving from the support ( in the event of a seismic event ) or from the mass itsel f ( in the case of industrial equipment ) .
Damping devices are known, placed under the foundations of buildings , having the purpose of dampening the vibrations of the ground as much as possible in the event of a seismic event .
Even in the case of industrial machines and equipment which, with their operation, generate vibrations , damping devices are used to reduce the stresses on the support structures .
In the case of a seismic event , the dissipation of vibrations and the consequent isolation are obtained by means of hysteresis cycles with shear deformation of blocks in elastomeric material and yielding of metal
materials .
The dissipative capacity is delegated to metal alloy elements (for example steel, lead, etc.) immersed within neoprene blocks. The metal element, through a shear deformation of the insulator mostly consisting of said neoprene, is able to dissipate energy through its own yield, giving the insulator the dissipative capacity.
This type of deformation (shear for polymeric materials and flexural for metallic ones) leads to a more or less rapid deterioration of the materials themselves, with the need to replace the damping devices. In the case of industrial machines or equipment, this drawback is a source of costs for the replacement of the devices and for the downtime of the machines. In the case of structural and infrastructural foundations isolated at the base, action is taken on the deterioration state of the insulator by replacing the entire insulator.
It is known that elastomers, subjected to uniaxial hysteresis loops, exhibit a unique behavior known as the Mullin Effect. This effect is induced by the micro-structure typical of polymeric materials which, subject to loading and unloading cycles, tend to align their monomers, exhibiting an
increase m the hardening and dissipative capacity of the material .
The purpose of the present invention is to provide a dissipating device suitable for isolating and damping a supported mass , from vibrations deriving from the support ( in the event of a seismic event ) or from the mass itsel f ( in the case of industrial equipment ) , subj ect to a lower state of degradation of elastomeric materials and contemplating the simple replacement of the polymeric material , present in less quantity than existing products .
The aforementioned and other purposes and advantages of the invention, which will emerge from the following description, are achieved with a device and a method such as those described in claims 1 and 11 respectively .
The device uses elastomers as damping elements and has a geometry capable of trans forming the tangential stresses in said damping elements into axial stresses .
The device is of the type comprising :
- a lower plate integral with a support ;
- an upper plate integral with a mass to be isolated and damped;
means interposed between said first and second plates ; wherein said means comprise elements in elastomeric material , suitable to perform the function of isolation and damping through repeated deformations inducing hysteretic cycles in said elements in elastomeric material and is characteri zed in that said means interposed between the first and second plate comprise a plurality of connecting rods , each of which is connected with a lower end with said lower plate by means of first spherical hinges and with an upper end, with said upper plate , by means of second spherical hinges .
The method provides for obtaining said insulation and damping by means of hysteresis cycles resulting from deformation of elements in elastomeric material interposed between the supported mass and the support , and is characteri zed by the fact of isolating and damping the vibrations that cause reciprocal sliding between said mass supported and said support through axial deformations of said elements in elastomeric material , said damping and insulation being obtained by means of the device according to the invention .
According to a preferred embodiment , the connecting rods constitute pyramid-shaped trusses , in which the connecting rods themselves are positioned along the lateral edges of said pyramid . The trellis is characteri zed by its initial height . Following the application of the mass to be insulated ( loading the insulator ) , the apex of the pylons is lowered, arranging itsel f on an intermediate plane and parallel to the two plates (medium work plane of the insulator ) . The trellis is trans formed into a flat structure working in the intermediate plane and parallel to the two plates . The relative motion between the plates is opposed by the trusses working through the axial regime of the truss connecting rods .
In the device according to the invention, the dissipating element is a prism of elastomeric material , subj ect to hysteresis cycles in the compression regime . Said dissipating element will always be compressed, and at the end of its li fe cycle it can be replaced by simply opening the insulator .
The main advantages resulting from the use of the invention are the following .
A first advantage consists in increasing the
useful life of the product since, at the end of the elastomer life cycle, the replacement of the entire device is not required but only of said elastomer.
A second advantage consists in adaptability and design: an appropriate choice of the characteristics of the connecting rods and the geometry of the truss allows to cover a wide range of stiffnesses (0.01 a 10 kN / mm) .
A third advantage consists in the possibility of fully exploiting the axial deformation regime, which is more efficient than a cutting or bending regime; this allows, with the same volumes and dimensions, to reduce the amount of the most expensive material, namely the elastomer. Thinking of a commercial product in neoprene with horizontal and vertical stiffnesses, respectively, Ko = 7 kN / mm and Kv = 5000 kN / mm, the analogue product according to the invention maintains the same volume and the same weight but allows to reduce by an order of magnitude the amount of elastomeric material to the detriment of the increase in steel (the first four times more expensive than the second) .
Preferred embodiments and non-trivial variants of the present invention form the subject of the
dependent claims.
It is understood that all the attached claims form an integral part of the present description.
It will be immediately obvious that innumerable variations and modifications (for example relating to shape, dimensions, arrangements and parts with equivalent functionality) can be made to what has been described without departing from the scope of the invention, as appears from the attached claims.
The present invention will be better described by some preferred embodiments, provided by way of non-limiting example, with reference to the attached drawings, in which:
- FIGS. 1 and 2 are two views of the damper device according to the present invention;
FIG. 3 shows the damper device under the effect of the applied vertical load;
FIG. 4 shows the basic structure of the device according to the invention;
- FIGS. 5 and 6 show two possible embodiments of the elastic damper element.
Referring to FIGS. 1, 2 and 3, with (1) a damper device according to the present invention is indicated .
According to a preferred embodiment of the invention, said device (1) comprises: a lower plate (2) which, with the interposition of a sheet of elastomeric material (2a) rests on a support (2b) ; an upper plate (3) which, with the interposition of a sheet of elastomeric material (3a) acts as a support to a mass (3b) ;
- at least three trusses (4) , each consisting of at least three axially deformable connecting rods (5) , each of which is connected with its lower end (5a) with said lower plate (2) by means of first spherical hinges (6) and with its upper end (5b) , with said upper plate (3) , by means of second spherical hinges (7) .
According to a preferred embodiment, illustrated in the attached figures, said trusses (4) are four in number for each damper, and each of said truss (4) comprises four connecting rods (5) . In FIG. 2, the connecting rods (5) are indicated through their axis, so as not to excessively complicate the drawing.
Furthermore, there is preferably a plurality of spacing balls or linear guides (8) , housed in corresponding seats (8a) , the function of which
will be described below.
According to a preferred embodiment, shown in the attached figures, said trusses are four in number for each damping device (1) and the connecting rods (5) are four in number for each trellis ( 4 ) .
The connecting rods (5) of the trusses (4) are arranged along the edges of a pyramid with the base resting on the lower plate (2) .
When the mass to be supported is not resting on the damper device (1) , the connecting rods (5) are inclined with respect to the plates (2, 3) by an angle > between 0 and 60 ° . When the load is applied, that is when the supported mass (3a) is placed on the upper plate (3) , the connecting rods (5) , due to the inclination, are subjected to compression and, being axially deformable, they shorten, allowing the upper plate (3) , and then the supported mass (3a) to descend, until the spacing balls (8) rest against the upper plate (3) (FIG. 3) .
Said spacer balls or linear guides (8) are of such dimensions that, following the lowering of the upper plate (3) , the connecting rods (5) are placed in a position substantially parallel to said plates
(2) and (3) . In this way, reciprocal sliding between said plates (2) and (3) gives rise to variations in the length of the connecting rods (5) , thus excluding shear stresses in the elastomeric elements.
In FIG. 4 shows one of said pylons (4) . According to a preferred embodiment, said lower spherical hinges (6) comprise a steel ball (6a) housed in a seat (6b) connected to said lower plate (2) , while said upper spherical hinges (7) comprise a ball in steel (7a) housed in a seat (7b) connected to said upper plate (3) .
The connecting rods (5) are, in turn, connected with said lower (6) and upper (7) spherical hinges by means of threaded pins (10) which are screwed to said balls (6a) and (7a) and to a first and a second head (11) and (12) of said connecting rods (5) , as shown in the enlarged details of FIG. 4.
FIG 5 shows a first embodiment of the connecting rod (5) . Said connecting rod (5) includes :
- said first head (11) ; at least two sleeves (Ila) integral with said first head (11) ;
- said second head (12) ;
- at least two bars (13) which are inserted with a first end in said sleeves (Ila) and are connected with a second end with said second head
(12) ; at least one stabilizing jacket (14) , sliding on said bars (13) ; an elastomeric element with a prismatic shape ( 15) .
Two threaded holes are made on said heads (11) and (12) , respectively (11b) and (12a) , in which said threaded pins (10) are screwed, which have the function of connecting with the spherical hinges (6) and ( 7) .
Said prismatic elastomeric element (15) connects the two heads (11) and (12) together and reacts by shortening to the compressive stresses resulting from the shortening due to the application of the load.
When the compression load is applied, due to the high slenderness of said elastomeric component
(13) , it tends to skid laterally. This drawback is eliminated by the anti-skid liners (14) , sliding on said bars (13) , which surround said prismatic elastomeric element (15) and prevent lateral
skidding thereof. The number of skid pads (14) is calculated in such a way as to reduce the free deflection length of the elastomeric prism below the critical values.
In FIG. 6 shows a connecting rod (20) , conceptually similar to the connecting rod (5) , as it is made up of the same components. Said connecting rod (20) is less slender than the connecting rod (5) , so as to give the device (1) greater horizontal stiffness. The number of antiskid liners of the connecting rod (5) and connecting rod (20) depends on the horizontal load levels provided on the insulator.
According to a preferred embodiment (not shown) , said connecting rods (5, 20) are already mounted in the position they would have after applying the load. Obviously it is advisable to carry out the assembly by applying an appropriate preload, so that the stress is always compressive, in any case of calculation and load of the insulator .
Claims
1. Device (1) for isolating and damping a supported mass (3b) , from vibrations deriving from the support (2b) or from the mass itself, of the type comprising :
- a lower plate (2) integral with a support (2b) ;
- an upper plate (3) integral with a mass (3b) to be insulated and damped; damping and insulating means (4, 5, 20) interposed between said lower plate (2) and upper plate ( 3 ) ; in which said damping and insulating means (4, 5, 20) comprise elements in elastomeric material, suitable to perform the function of insulation and damping through repeated deformations and consequent hysteresis, said damping and insulating means (4, 5, 20) interposed between said lower plate (2) and upper plate (3) comprising a plurality of connecting rods (5, 20) , each of which is connected with a lower end (5a, 20a) with said lower plate (2) , by means of first spherical hinges (6) and with an upper end (5b, 20b) , with said upper plate (3) , by means of second spherical hinges (7) , said connecting rods (5, 20) being inclined at an angle > with respect to said lower
plate ( 2) and upper (3) , so that, by applying the load to the upper plate (3) , said connecting rods (5, 20) rotate and shorten until they are substantially parallel to the plane of said lower plate (2) and above (3) ; characterized in that said connecting rods (5, 20) include :
- a first head (11) ;
- at least two sleeves (Ila) integral with said first head (11) ;
- a second head (12) ;
- at least two bars (13) which are inserted with a first end in said sleeves (Ila) and are connected with a second end with said second head (12) ;
- at least one stabilizing jacket (14) , sliding on said bars ( 13 ) ;
- an elastic element of prismatic shape (15) which is interposed between said first head (11) and second head (12) , reacting to compression when, due to the application of the load, said connecting rods (5, 20) are shortened.
2. Device (1) for isolating and damping a supported mass according to claim 1, characterized in that it provides means (8) , interposed between said lower (2) and upper (3) plates, adapted to limit the
lowering of the plate upper (3) upon application of the load, so that the rotation of said connecting rods (5, 20) stops when said position is reached substantially parallel to the plane of said lower
(2) and upper (3) plates.
3. Device (1) for isolating and damping a supported mass according to claim 1, characterized in that said connecting rods (5, 20) are positioned so as to configure three or more trusses (4) .
4. Device (1) for isolating and damping a supported mass according to claim 3, characterized in that said trusses (4) have a pyramidal shape and said connecting rods (5, 20) are arranged along the lateral edges of said pyramid.
5. Device (1) for isolating and damping a supported mass according to claims 1 to 4, characterized in that said connecting rods (5, 20) are connected with said lower plate (2) and with said upper plate
(3) respectively with first spherical hinges (6) and second spherical hinges (7) .
6. Device (1) for isolating and damping a supported mass according to claim 1 or 5, characterized in that said connecting rods (5, 20) are connected with said spherical hinges (6, 7) by means of a pin (10) which screws on said heads (11, 12) and on the
balls (6a, 7a) of said spherical hinges (6, 7) .
7. Device (1) for isolating and damping a supported mass according to claims 1 to 6, characterized in that it provides:
- the interposition of a first plate of elastomeric material (2a) between said lower plate (2) and said support (2b) ; the interposition of a second plate of elastomeric material (3a) between said upper plate (3) and said mass to be damped (3b) ; said sheets of elastomeric material (2a, 3a) having the function of damping and isolating from vertical vibrations .
8. Device (1) for isolating and damping a supported mass according to claims 1 to 7, characterized in that said connecting rods (5, 20) are already mounted in the position they would have after applying the load, said assembly being carried out applying an appropriate preload, so that the stress is always compressive, in any working situation due to vibrations.
9. Method for isolating and damping a supported mass (3b) , from vibrations deriving from the support (2b) or from the mass itself, said isolation and damping being obtained by means of
16
hysteresis cycles resulting from deformation of elements in elastomeric material interposed between the supported mass (3b) and the support (3b) , characterized in that it isolates and dampens the vibrations that cause reciprocal sliding between said supported mass (3b) and said support (2b) through axial deformations of said elements in elastomeric material, said damping and insulation being obtained by means of a device according to claims 1 to 8.
17
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102020000027026A IT202000027026A1 (en) | 2020-11-11 | 2020-11-11 | Device for the isolation of industrial equipment, civil structures and infrastructures based on lattice lattice modules |
| IT102020000027026 | 2020-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022101945A1 true WO2022101945A1 (en) | 2022-05-19 |
Family
ID=74669241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT2021/050360 WO2022101945A1 (en) | 2020-11-11 | 2021-11-04 | Device for the insulation of industrial equipment, structures and civil infrastructures based on reticular truss modules |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | IT202000027026A1 (en) |
| WO (1) | WO2022101945A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100032876A1 (en) * | 2008-08-07 | 2010-02-11 | Drs Sensors & Targeting Systems, Inc. | Vibration isolator system |
| CN106368328A (en) * | 2016-10-17 | 2017-02-01 | 安徽信泽科技有限公司 | Pull rod type composite spring three-dimensional shock isolation support |
| CN105937577B (en) * | 2016-06-23 | 2017-12-22 | 亳州沃野知识产权服务有限公司 | A kind of intelligent electric power power distribution cabinet multidimensional shock mount |
| CN208668624U (en) * | 2018-08-01 | 2019-03-29 | 西南林业大学 | A kind of structures with interlayer seismic isolation shock isolating pedestal limiting device |
-
2020
- 2020-11-11 IT IT102020000027026A patent/IT202000027026A1/en unknown
-
2021
- 2021-11-04 WO PCT/IT2021/050360 patent/WO2022101945A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100032876A1 (en) * | 2008-08-07 | 2010-02-11 | Drs Sensors & Targeting Systems, Inc. | Vibration isolator system |
| CN105937577B (en) * | 2016-06-23 | 2017-12-22 | 亳州沃野知识产权服务有限公司 | A kind of intelligent electric power power distribution cabinet multidimensional shock mount |
| CN106368328A (en) * | 2016-10-17 | 2017-02-01 | 安徽信泽科技有限公司 | Pull rod type composite spring three-dimensional shock isolation support |
| CN208668624U (en) * | 2018-08-01 | 2019-03-29 | 西南林业大学 | A kind of structures with interlayer seismic isolation shock isolating pedestal limiting device |
Also Published As
| Publication number | Publication date |
|---|---|
| IT202000027026A1 (en) | 2021-02-11 |
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