CN110425368A - A kind of flexible collar based on visco-elasticity polyurethane layer - Google Patents
A kind of flexible collar based on visco-elasticity polyurethane layer Download PDFInfo
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- CN110425368A CN110425368A CN201910756217.8A CN201910756217A CN110425368A CN 110425368 A CN110425368 A CN 110425368A CN 201910756217 A CN201910756217 A CN 201910756217A CN 110425368 A CN110425368 A CN 110425368A
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- Prior art keywords
- visco
- polyurethane layer
- plunger
- elasticity polyurethane
- elasticity
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
- F16L55/035—Noise absorbers in the form of specially adapted hangers or supports
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
A kind of flexible collar based on visco-elasticity polyurethane layer, the encircling type metallic framework are an integral structure, and are machined with the first plunger hole and the second plunger hole at encircling type metallic framework both ends；The both ends of visco-elasticity polyurethane layer liner are machined with the first plunger and the first plunger of protrusion；The first plunger and the first plunger such as mushroom of its protrusion；The first plunger hole and the second plunger hole of the first plunger and the first plunger and encircling type metallic framework that visco-elasticity polyurethane layer pads both ends protrusion cooperate, visco-elasticity polyurethane layer liner is installed on to the inside of encircling type metallic framework, encircling type metallic framework is elongated metal plate, and encircling type metallic framework is process by elongated metal plate.The invention high temperature resistant, corrosion-resistant, oil resistant characteristic, have good wear-resisting property and damping behavior, and structure is simple, handling ease, rigidity easy for installation with elasticity is good, liner replacement is convenient, applied in the fixed support device technical field of aeroengine pipeline system.
Description
Technical field
The present invention is to be related to one of fixed support device technical field of aeroengine pipeline system to be based on viscoelastic
The flexible collar of property layer of polyurethane.
Background technique
Currently, clip is the fixed support for playing enhancing pipeline rigidity, fastening conduit positions in aeroengine pipeline system
Device.For a long time, the failure of the pipe-line system as caused by the vibration of aero-engine always influence aero-engine complete machine can
By one of the major issue of property.The structure of clip and the inner lining material of clip are the main of the vibration characteristics of influence pipe-line system
One of factor.Clip will not only meet fixed pipeline, reduce the conditions such as vibration transmissibility, also meet high temperature resistant, corrosion-resistant etc.
Rugged environment requirement.
Traditional clip is divided into rigid clip according to structure difference and rigid clip adds two kinds of flexible liner material.Rigidity card
Hoop directly and pipeline contact, mainly plays fixed function, can not carry out effective vibration damping to pipeline vibration, rigid clip performance can not expire
Sufficient Aeronautics and Astronautics relevant criterion.Currently, most of clips select rigid clip to add polymer rubber in Aeronautics and Astronautics field
Material or metal rubber material are as inner lining structure.The high temperature resistant of High-molecular rubber material, corrosion-resistant and oil resistance are poor, In
Service life is limited under particular surroundings.Metal rubber material is to be coiled into the superposition of helical metal wire random coil by several
The fenestral fabric body being squeezed into overcomes the deficiency of High-molecular rubber material, but processing technology is complicated, finished weight compared with
Greatly, price is higher, since usage quantity is more in aero-engine for clip, is not able to satisfy using the clip of metal rubber material
The design requirement of aero-engine light-weight design.In addition, metal-rubber damping behavior is not obvious enough, optimize its stiffness characteristics and
Damping characteristic is more difficult.
The patent No. 200920007331.2 discloses a kind of no bracket plastic external protecting tube polyurethane foam heat-insulation tube two step method
Foaming bench, the patent the problem is that, good viscoelastic layer can not be formed using polyurethane foam, due to aeroplane engine
The vibration of machine is strong, which can not carry out the vibration damping of aeroengine pipeline and fix to support.
The patent No. 201120209014.6 discloses the adhesive connecting process personality card of inner pipe of casting polyurethane conveying pipe
Hoop, the patent the problem is that, clamp special only serves fixation in the bonding connection of inner pipe of casting polyurethane conveying pipe
Effect, can not provide vibration damping, and clamp special is fitted without viscoelastic lining material.
The patent No. 201520287960.0 discloses a kind of clamping hoop type pull-off protective device, the patent the problem is that,
Polyurethane material is wrapped on the periphery of stainless steel lathe dog, only serves protective action.Polyurethane material and stainless steel lathe dog
Combination can not provide vibration damping and fixed support.
Yoke configurations in the prior art, traditional aero-engine clip split-type structure, processing is complicated, and installation is inconvenient；It passes
The high temperature resistant for High-molecular rubber material of uniting, corrosion-resistant and oil resistance are poor, can not adapt to severe aero-engine building ring
Border；Traditional metal rubber material processing technology is complicated, and finished weight is larger, and price is higher, and damping behavior is not obvious enough, changes
Its stiffness characteristics and damping characteristic are more difficult；High-molecular rubber material and metal rubber material wearability and elasticity are poor, make
With longevity, can not be used in extreme environment.For technical problem present in above-mentioned yoke configurations, researching and designing
A kind of flexible collar structure based on novel viscoelastic layer of polyurethane, so that overcoming the problems of prior art is very must
It wants.Therefore, developing a kind of flexible collar based on visco-elasticity polyurethane layer is always new issue anxious to be resolved.
Summary of the invention
The purpose of the present invention is to provide a kind of flexible collars based on visco-elasticity polyurethane layer, for solving existing structure
Present in technical problem, the inventive structure is reliable, the processing is simple, it is easy for installation, make suitable for severe Aeronautics and Astronautics equipment
With environment, can be widely applied in pipeline fixation and pipeline vibration and noise reducing in all kinds of civil equipments.
The object of the present invention is achieved like this: a kind of flexible collar based on visco-elasticity polyurethane layer, including encircling type
Metallic framework, visco-elasticity polyurethane layer liner, the encircling type metallic framework is an integral structure, in encircling type metallic framework
Both ends are machined with the first plunger hole and the second plunger hole；The both ends of visco-elasticity polyurethane layer liner are machined with the first plunger of protrusion
With the second plunger；The first plunger and the second plunger such as mushroom of its protrusion；Visco-elasticity polyurethane layer pads the of both ends protrusion
The first plunger hole and the second plunger hole of one plunger and the second plunger and encircling type metallic framework cooperate, by visco-elasticity polyurethane layer
Liner is installed on the inside of encircling type metallic framework；
The encircling type metallic framework is elongated metal plate, and encircling type metallic framework is process by elongated metal plate,
According to different pipeline diameters, it is processed as meeting the circular arc of pipeline diameter, and be machined with inside circular arc for installing viscoplasticity
The first plunger hole and the second plunger hole of layer of polyurethane；Terminal in encircling type metallic framework two sides, has first straight line to prolong respectively
Long section and second straight line extension, first straight line extension and second straight line extension overlap, encircling type metallic framework
The end cooperation of the first straight line extension and second straight line extension of two sides is machined with the first fixed mounting hole and second and fixes
Mounting hole in processing and guarantees that the first fixed mounting hole and the second fixed mounting hole are concentric；
The visco-elasticity polyurethane layer liner is the layer of polyurethane of strip, has protrusion at visco-elasticity polyurethane layer liner both ends
Such as mushroom first plunger and the second plunger, two have protrusion as mushroom first plunger and the second plunger spacing with
First plunger hole at encircling type metallic framework both ends and the spacing dimension of the second plunger hole are consistent；
The material of the encircling type metallic framework is made of 0Cr18Ni9 stainless steel；
The material of the visco-elasticity polyurethane layer liner is visco-elasticity polyurethane material；
Described its surface density of visco-elasticity polyurethane material is typically about 0.464kg/m2, tensile strength 37Mpa, elasticity modulus
For 23GPa, heatproof reaches -80-50 DEG C；
A kind of flexible collar based on visco-elasticity polyurethane layer and common clip carry out damping property pair on a vibration table
Than being obtained by experimental test, the flexible collar vibration transmissibility decline up to 80% based on visco-elasticity polyurethane layer is whole to shake
Dynamic horizontal 5 decibels of decline or more；
A kind of working principle of flexible collar based on visco-elasticity polyurethane layer is the visco-elasticity polyurethane layer of the invention
Gasket material has high temperature resistant, corrosion-resistant, oil resistant characteristic, has good wear-resisting property and damping behavior, can be at 300 DEG C
At a temperature of long-term work, long service life, handling ease, replacement is convenient, the working environment severe suitable for aero-engine；One
The metallic framework of flexible collar of the kind based on visco-elasticity polyurethane layer is designed to circumferential type structure, has structure simple, and processing is held
Easily, the features such as easy for installation；It is more preferable with the compactness of pipeline after visco-elasticity polyurethane layer is installed；One kind being based on the poly- ammonia of viscoplasticity
The integral strength of clip, the more traditional card of the thickness of encircling type metallic framework can be improved in the circumferential type structure of the flexible collar of ester layer
Hoop metallic framework greatly reduces；In addition visco-elasticity polyurethane layer inner lining material is used, weight greatly subtracts compared with conventional metals rubber
Gently, therefore the flexible collar overall weight based on visco-elasticity polyurethane layer is lighter, is suitable for sending out using a fairly large number of aviation of clip
The installation of motivation pipe-line system is fixed；A kind of structure of the flexible collar based on visco-elasticity polyurethane layer is simple, installs viscoplasticity
After layer of polyurethane liner, there is good rigidity and elasticity, and the separate installment structure of metallic framework and interior village, guarantee liner
Replacement is convenient；A kind of flexible collar based on visco-elasticity polyurethane layer is due to passing through adjusting there are visco-elasticity polyurethane layer liner
The screw-down torque of bolt in clip fixed mounting hole can significantly modify the support stiffness of clip, and then changes clip and support pipeline
The intrinsic frequency of system can easily change the vibration characteristics of pipe-line system, guarantee the vibration reliability of pipe-line system, reduce
Clip, which bears aircraft and the vibration of aero-engine, to be influenced；
A kind of use of flexible collar based on visco-elasticity polyurethane layer and installation method are, a kind of poly- based on viscoplasticity
The flexible collar of urethane layer when in use, opens the straight line extension of encircling type metallic framework two sides, is sleeved on pipeline outer wall,
Closure is held tightly, passes through fixed mounting hole with bolt, a kind of flexible collar based on visco-elasticity polyurethane layer is fixed on the machine body,
The installation of the flexible collar based on visco-elasticity polyurethane layer can be completed.
The structure and working principle of the invention for being characterized by it and use operating method.
A kind of flexible collar based on visco-elasticity polyurethane layer compared with prior art, has the following beneficial effects:
(1) visco-elasticity polyurethane layer gasket material of the invention has high temperature resistant, corrosion-resistant, oil resistant characteristic, has good
Wear-resisting property and damping behavior, can long-term work at a temperature of 300 DEG C, long service life, handling ease, replacement is convenient, is applicable in
In the severe working environment of aero-engine.
(2) metallic framework of clip of the present invention is designed to circumferential type structure, has structure simple, handling ease, installation side
Just the features such as.It is more preferable with the compactness of pipeline after novel viscoelastic layer of polyurethane is installed.
(3) integral strength of clip can be improved in the circumferential type structure of clip of the present invention, and the thickness of metallic framework is more traditional
Clip metallic framework greatly reduces.In addition novel viscoelastic layer of polyurethane inner lining material is used, weight is compared with conventional metals rubber
Considerably reduce, therefore the flexible collar overall weight based on novel viscoelastic layer of polyurethane is lighter, be suitable for using clip quantity compared with
The installation of more aeroengine pipeline systems is fixed.
(4) structure of clip of the present invention is simple, installation novel viscoelastic layer of polyurethane liner after, have good rigidity with
Elasticity, and the separate installment structure of metallic framework and interior village guarantee that liner replacement is convenient.
(5) present invention is since there are novel viscoelastic layer of polyurethane liners, by adjusting bolt in clip fixed mounting hole
Screw-down torque, can significantly modify the support stiffness of clip, and then change the intrinsic frequency of clip support pipe-line system, Ji Kefang
Just the vibration characteristics of change pipe-line system guarantees the vibration reliability of pipe-line system, reduces clip and bears aircraft and aviation hair
The vibration of motivation influences.
It will be widely used in the fixed support device technical field of aeroengine pipeline system.
Detailed description of the invention
The following describes the present invention in detail with reference to the accompanying drawings and embodiments.
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is encircling type metallic framework partial structure diagram of the invention.
Fig. 3 is visco-elasticity polyurethane layer liner part structural schematic diagram of the invention.
Fig. 4 is the present invention and common clip damping capacity contrast curve chart.
Specific embodiment
Referring to attached drawing, a kind of flexible collar based on visco-elasticity polyurethane layer, including encircling type metallic framework 1, viscoplasticity
Layer of polyurethane liner 2, the encircling type metallic framework 1 is an integral structure, and is machined with the at 1 both ends of encircling type metallic framework
One plunger hole A and the second plunger hole B；The both ends of visco-elasticity polyurethane layer liner 2 are machined with the first plunger C and the second column of protrusion
Fill in D；The the first plunger C and the second plunger D such as mushroom of its protrusion；First column of visco-elasticity polyurethane layer liner 2 both ends protrusion
The the first plunger hole A and the second plunger hole B for filling in C and the second plunger D and encircling type metallic framework 1 cooperate, by visco-elasticity polyurethane
Layer liner 2 is installed on the inside of encircling type metallic framework 1.
The encircling type metallic framework 1 is elongated metal plate, and encircling type metallic framework 1 is processed by elongated metal plate
It forms, according to different pipeline diameters, is processed as meeting the circular arc E of pipeline diameter, and be machined with inside circular arc E for installing
The the first plunger hole A and the second plunger hole B of visco-elasticity polyurethane layer；Terminal in 1 two sides of encircling type metallic framework has respectively
One straight line extension F and second straight line extension G, first straight line extension F and second straight line extension G overlap, ring
The end cooperation for embracing the first straight line extension F and second straight line extension G of 1 two sides of formula metallic framework is machined with the first fixed peace
Hole H and the second fixed mounting hole I is filled, in processing and guarantees that the first fixed mounting hole H and the second fixed mounting hole I is concentric.
The visco-elasticity polyurethane layer liner 2 is the layer of polyurethane of strip, pads 2 both ends in visco-elasticity polyurethane layer
Have protrusion such as mushroom first plunger C and the second plunger D, two have protrusion such as mushroom first plunger C and second
Plunger D spacing is consistent with the spacing dimension of the first plunger hole A at 1 both ends of encircling type metallic framework and the second plunger hole B.
The material of the encircling type metallic framework 1 is made of 0Cr18Ni9 stainless steel.
The material of the visco-elasticity polyurethane layer liner 2 is visco-elasticity polyurethane material.
Described its surface density of visco-elasticity polyurethane material is typically about 0.464kg/m2, tensile strength 37Mpa, elasticity
Modulus is 23GPa, and heatproof reaches -80-50 DEG C.
A kind of flexible collar based on visco-elasticity polyurethane layer carries out damping on a vibration table with common clip
It can compare, as shown in Fig. 4, be obtained by experimental test, under the flexible collar vibration transmissibility based on visco-elasticity polyurethane layer
Drop up to 80%, body vibration level declines 5 decibels or more.
A kind of working principle of flexible collar based on visco-elasticity polyurethane layer is the poly- ammonia of the viscoplasticity of the invention
Ester layer pads 2 materials, has high temperature resistant, corrosion-resistant, oil resistant characteristic, has good wear-resisting property and damping behavior, can be
Long-term work at a temperature of 300 DEG C, long service life, handling ease, replacement is convenient, the building ring severe suitable for aero-engine
Border；A kind of metallic framework of the flexible collar based on visco-elasticity polyurethane layer is designed to circumferential type structure, has structure simple, adds
The features such as work is easy, easy for installation；It is more preferable with the compactness of pipeline after visco-elasticity polyurethane layer is installed；One kind being based on viscoplasticity
The integral strength of clip can be improved in the circumferential type structure of the flexible collar of layer of polyurethane, and the thickness of encircling type metallic framework 1 relatively passes
The clip metallic framework of system greatly reduces；In addition visco-elasticity polyurethane layer inner lining material is used, weight is compared with conventional metals rubber
It considerably reduces, therefore the flexible collar overall weight based on visco-elasticity polyurethane layer is lighter, is suitable for a fairly large number of using clip
The installation of aeroengine pipeline system is fixed；A kind of structure of the flexible collar based on visco-elasticity polyurethane layer is simple, installation
After visco-elasticity polyurethane layer liner 2, there is good rigidity and elasticity, and the separate installment structure of metallic framework and interior village,
Guarantee that liner replacement is convenient；A kind of flexible collar based on visco-elasticity polyurethane layer due to there are visco-elasticity polyurethane layer liner,
By adjusting the screw-down torque of bolt in clip fixed mounting hole, the support stiffness of clip can significantly modify, and then change clip
The intrinsic frequency for supporting pipe-line system, can easily change the vibration characteristics of pipe-line system, guarantee that the vibration of pipe-line system can
By property, the vibration influence that clip bears aircraft and aero-engine is reduced.
A kind of use of flexible collar based on visco-elasticity polyurethane layer and installation method are that one kind is based on viscoelastic
Property layer of polyurethane flexible collar when in use, open 1 two sides of encircling type metallic framework straight line extension, be sleeved on pipeline
Outer wall, closure are held tightly, pass through fixed mounting hole with bolt, a kind of flexible collar based on visco-elasticity polyurethane layer is fixed on machine
On body, the installation of the flexible collar based on visco-elasticity polyurethane layer can be completed.
P indicates curve of the invention in Fig. 4；The curve of the Q expression prior art.
Claims (9)
1. a kind of flexible collar based on visco-elasticity polyurethane layer, including encircling type metallic framework, visco-elasticity polyurethane layer liner,
It is characterized by: the encircling type metallic framework is an integral structure, the first column is machined at encircling type metallic framework both ends
Consent and the second plunger hole；The both ends of visco-elasticity polyurethane layer liner are machined with the first plunger and the second plunger of protrusion；Its is convex
The first plunger and the second plunger such as mushroom risen；The first plunger and the second plunger of visco-elasticity polyurethane layer liner both ends protrusion
Cooperate with the first plunger hole of encircling type metallic framework and the second plunger hole, visco-elasticity polyurethane layer liner is installed on encircling type
The inside of metallic framework.
2. a kind of flexible collar based on visco-elasticity polyurethane layer according to claim 1, it is characterised in that: the ring
Embracing formula metallic framework is elongated metal plate, and encircling type metallic framework is process by elongated metal plate, according to different pipes
Road diameter is processed as meeting the circular arc of pipeline diameter, and be machined with inside circular arc for installing visco-elasticity polyurethane layer
One plunger hole and the second plunger hole；Terminal in encircling type metallic framework two sides has first straight line extension and second directly respectively
Line extension, first straight line extension and second straight line extension overlap, and the first of encircling type metallic framework two sides is straight
The cooperation of the end of line extension and second straight line extension is machined with the first fixed mounting hole and the second fixed mounting hole, is processing
When and guarantee the first fixed mounting hole and the second fixed mounting hole it is concentric.
3. a kind of flexible collar based on visco-elasticity polyurethane layer according to claim 1, it is characterised in that: described is viscous
Elastomeric polyurethane layer liner is the layer of polyurethane of strip, visco-elasticity polyurethane layer liner both ends have protrusion as mushroom
First plunger and the second plunger, two have protrusion such as mushroom first plunger and the second plunger spacing and encircling type metal bone
First plunger hole at frame both ends and the spacing dimension of the second plunger hole are consistent.
4. a kind of flexible collar based on visco-elasticity polyurethane layer according to claim 1, it is characterised in that: the ring
The material for embracing formula metallic framework is made of 0Cr18Ni9 stainless steel.
5. a kind of flexible collar based on visco-elasticity polyurethane layer according to claim 1, it is characterised in that: described is viscous
The material of elastomeric polyurethane layer liner is visco-elasticity polyurethane material.
6. a kind of flexible collar based on visco-elasticity polyurethane layer according to claim 5, it is characterised in that: described is viscous
Its surface density of elastane is typically about 0.464kg/m2, tensile strength 37Mpa, elasticity modulus 23GPa, heatproof
Reach -80-50 DEG C.
7. a kind of flexible collar based on visco-elasticity polyurethane layer according to claim 1, it is characterised in that: described one
Flexible collar and common clip of the kind based on visco-elasticity polyurethane layer carry out damping property comparison on a vibration table, pass through test and survey
Examination obtains, and the flexible collar vibration transmissibility decline up to 80% based on visco-elasticity polyurethane layer, body vibration level declines 5 points
It is more than shellfish.
8. a kind of flexible collar based on visco-elasticity polyurethane layer according to claim 1, it is characterised in that: described one
The working principle of flexible collar of the kind based on visco-elasticity polyurethane layer is the visco-elasticity polyurethane layer gasket material of the invention, tool
Have high temperature resistant, corrosion-resistant, oil resistant characteristic, have good wear-resisting property and damping behavior, can at a temperature of 300 DEG C permanent worker
Make, long service life, handling ease, replacement is convenient, the working environment severe suitable for aero-engine；One kind being based on viscoplasticity
The metallic framework of the flexible collar of layer of polyurethane is designed to circumferential type structure, has structure simple, handling ease is easy for installation etc.
Feature；It is more preferable with the compactness of pipeline after visco-elasticity polyurethane layer is installed；A kind of flexible collar based on visco-elasticity polyurethane layer
Circumferential type structure the integral strength of clip can be improved, the more traditional clip metallic framework of the thickness of encircling type metallic framework is greatly
Reduce；In addition visco-elasticity polyurethane layer inner lining material is used, weight is considerably reduced compared with conventional metals rubber, therefore is based on viscoplasticity
The flexible collar overall weight of layer of polyurethane is lighter, suitable for using the peace of a fairly large number of aeroengine pipeline system of clip
Dress is fixed；A kind of structure of the flexible collar based on visco-elasticity polyurethane layer is simple, after installation visco-elasticity polyurethane layer liner, tool
There are good rigidity and elasticity, and the separate installment structure of metallic framework and interior village, guarantees that liner replacement is convenient；One kind is based on
The flexible collar of visco-elasticity polyurethane layer is since there are visco-elasticity polyurethane layer liners, by adjusting spiral shell in clip fixed mounting hole
The screw-down torque of bolt can significantly modify the support stiffness of clip, and then change the intrinsic frequency of clip support pipe-line system
The convenient vibration characteristics for changing pipe-line system, guarantees the vibration reliability of pipe-line system, reduces clip and bears aircraft and aviation
The vibration of engine influences.
9. a kind of flexible collar based on visco-elasticity polyurethane layer according to claim 1, it is characterised in that: described one
The use of flexible collar of the kind based on visco-elasticity polyurethane layer and installation method are a kind of elasticity based on visco-elasticity polyurethane layer
Clip when in use, opens the straight line extension of encircling type metallic framework two sides, is sleeved on pipeline outer wall, and closure is held tightly, uses
Bolt passes through fixed mounting hole, and a kind of flexible collar based on visco-elasticity polyurethane layer is fixed on the machine body, base can be completed
In the installation of the flexible collar of visco-elasticity polyurethane layer.
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| CN112460368A (en) * | 2020-12-09 | 2021-03-09 | 武汉佳福节能环保高科股份有限公司 | Pipeline noise reduction system |
| CN113309901A (en) * | 2021-06-21 | 2021-08-27 | 中铁建工集团有限公司 | Pipeline mounting bracket with novel structure |
| CN113669543A (en) * | 2021-07-19 | 2021-11-19 | 东北大学 | Aero-engine duplex clamp with vibration-damping temperature-resistant function |
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|---|---|---|---|---|
| CN112460368A (en) * | 2020-12-09 | 2021-03-09 | 武汉佳福节能环保高科股份有限公司 | Pipeline noise reduction system |
| CN113309901A (en) * | 2021-06-21 | 2021-08-27 | 中铁建工集团有限公司 | Pipeline mounting bracket with novel structure |
| CN113669543A (en) * | 2021-07-19 | 2021-11-19 | 东北大学 | Aero-engine duplex clamp with vibration-damping temperature-resistant function |
| CN113669543B (en) * | 2021-07-19 | 2022-09-06 | 东北大学 | Aero-engine duplex clamp with vibration-damping temperature-resistant function |
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Application publication date: 20191108 |