CN113529639A - Vertical pipe vibration suppression device and method for combined rotation of strake and impeller in mesh enclosure - Google Patents
Vertical pipe vibration suppression device and method for combined rotation of strake and impeller in mesh enclosure Download PDFInfo
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- CN113529639A CN113529639A CN202110828219.0A CN202110828219A CN113529639A CN 113529639 A CN113529639 A CN 113529639A CN 202110828219 A CN202110828219 A CN 202110828219A CN 113529639 A CN113529639 A CN 113529639A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/002—Influencing flow of fluids by influencing the boundary layer
- F15D1/0025—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply
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Abstract
The invention discloses a vertical pipe vibration suppression device and a method for combined rotation of a strake and an impeller in a mesh enclosure, which comprises a vertical beam and a vertical pipe, wherein the top of the vertical beam is welded with a cross beam, the bottom of the vertical beam is welded with a transverse plate, the front of the vertical beam is welded with a connecting plate, the inner wall of the connecting plate is rotatably connected with a rotating shaft, one end of the rotating shaft penetrates through the outside of the connecting plate, one end of the rotating shaft is fixedly provided with a propeller, the device provides kinetic energy through the propeller, and the rotation of the propeller is driven through water flow, so the device has the great advantage of energy saving, meanwhile, the kinetic energy generated by the propeller can be finally transmitted to a rotating rod through the transmission of a series of structures such as the rotating shaft and the like, when the rotating rod rotates, a first auger and a second auger can be driven to rotate, and the water flow at two sides behind the vertical pipe can be disturbed through the rotating action of the first auger and the second auger, thereby avoiding the occurrence of vortex vibration.
Description
Technical Field
The invention relates to the technical field of vortex-induced vibration suppression, in particular to a vertical pipe vibration suppression device and method for combined rotation of a strake and an impeller in a net cover.
Background
For the cylindrical cross-section structure commonly adopted in ocean engineering, the alternately-distributed vortex shedding can generate pulsating pressure which periodically changes along the flow direction and along the flow direction on the cylinder. If the column is now resiliently supported, or if the flexible riser allows elastic deformation, the pulsating fluid forces will induce periodic oscillations of the column (riser), which in turn will alter the vortex shedding pattern of its wake. This problem of fluid-structure interaction is known as "vortex induced vibration".
If the natural vibration frequency of the member is close to the release frequency of the vortex, the structure is subjected to resonance destruction, which is easily caused on a high-rise structure, so that the vortex-induced vibration is extremely harmful, measures are taken to prevent the vortex-induced vibration, and therefore, if the vortex-induced vibration is to be eliminated, the wake vortex of the member needs to be destroyed, so that the generation of regular vibration is avoided.
Disclosure of Invention
In order to solve the problems, the invention provides a vertical pipe vibration suppression device and a method for combined rotation of a strake and an impeller in a mesh enclosure.
A vertical pipe vibration suppression device with a guard inner strake and an impeller rotating in a combined mode comprises a vertical beam and a vertical pipe, wherein a cross beam is welded at the top of the vertical beam, a transverse plate is welded at the bottom of the vertical beam, a connecting plate is welded on the front side of the vertical beam, a rotating shaft is rotatably connected to the inner wall of the connecting plate, one end of the rotating shaft penetrates through the outside of the connecting plate, and a propeller is fixedly mounted at one end of the rotating shaft;
the other end of the rotating shaft penetrates through the inside of the vertical beam, a first helical gear is fixedly mounted at the other end of the rotating shaft, a second helical gear is meshed with the back face of the first helical gear, a connecting rod is fixedly mounted on the inner wall of the second helical gear, the bottom of the connecting rod is rotatably connected with the inner wall of the vertical beam, the top of the connecting rod penetrates through the inside of the cross beam, the top of the connecting rod is rotatably connected with the inner wall of the cross beam, a first driving tooth is fixedly mounted at the upper end of the surface of the connecting rod, and transmission assemblies are arranged on two sides of the first driving tooth;
the both sides at crossbeam inner chamber top all rotate and are connected with the bull stick, the outside of crossbeam is run through to the bottom of bull stick, the bottom fixed mounting of bull stick has first auger, the bottom fixed mounting of first auger has the second auger, the spiral direction of first auger and second auger sets up for opposite.
Further, the back of crossbeam and diaphragm all welds the collar, the inner wall fixed mounting of collar has waterproof bearing, waterproof bearing's inner circle fixed mounting is on the surface of riser.
Further, the transmission assembly comprises a transmission rod, the two ends of the transmission rod are rotatably connected with the inner wall of the cross beam, the surface of the transmission rod is respectively and fixedly provided with a driving wheel, a first driven tooth and a second driving tooth, the first driven tooth is meshed with the first driving tooth, the surface of the driving wheel is wound with a steel belt, the driving wheel is connected with a driven wheel through steel belt transmission, and the driven wheel is fixedly arranged on the surface of the rotating rod.
Furthermore, the top of diaphragm rotates and is connected with the commentaries on classics bucket, the hole has been seted up on the surface of commentaries on classics bucket, the bottom of second auger rotates with the inner wall of changeing the bucket and is connected, the top fixed mounting of changeing the bucket has the commentaries on classics pipe, the inner chamber of crossbeam is run through to the top of commentaries on classics pipe, the fixed surface of commentaries on classics pipe installs the driven tooth of second, the driven tooth of second meshes with the second initiative tooth.
Furthermore, the rotating rod is located inside the rotating pipe, a first rotating shaft sealing element is sleeved on the surface of the rotating rod, and the surface of the first rotating shaft sealing element is fixedly installed on the inner wall of the rotating pipe.
Furthermore, a second rotating shaft sealing element is sleeved on the surface of the rotating pipe, and the surface of the second rotating shaft sealing element is fixedly installed on the inner wall of the cross beam.
Furthermore, a third rotating shaft sealing element is sleeved on the surface of the rotating shaft, and the surface of the third rotating shaft sealing element is fixedly installed on the inner wall of the connecting plate.
Further, a protective cover is fixedly mounted on the right side of the connecting plate, and the propeller is located inside the protective cover.
Furthermore, the top of the cross beam is communicated with an oil filling pipe, and the top of the oil filling pipe is in threaded connection with a pipe cover.
A vertical pipe vibration suppression device with a screen panel and an impeller rotating in a combined mode comprises a using method of the vertical pipe vibration suppression device
The method comprises the following steps:
s1: when water flows, the propeller can be driven to rotate, the rotating shaft can be driven to rotate when the propeller rotates, the rotating shaft can drive the first helical gear to rotate when rotating, the first helical gear drives the second helical gear to rotate, and the second helical gear drives the connecting rod to rotate;
s2: the connecting rod drives the first driving tooth to rotate, the first driving tooth drives the first driven tooth to rotate, the first driven tooth drives the transmission rod to rotate, the transmission rod can synchronously drive the driving wheel and the second driving tooth to rotate during rotation, and the driving wheel can drive the driven wheel to rotate through the steel belt;
s3: the driven wheel drives the rotating rod to rotate, the rotating rod drives the first auger to rotate, the first auger drives the second auger to rotate, and the vortexes of the wakes at the two sides of the vertical pipe can be destroyed through the action of the first auger and the second auger, so that the vortex vibration phenomenon is avoided.
The invention has the advantages that the device provides kinetic energy through the propeller, and the rotation of the propeller is driven by water flow, so the device has a great advantage of saving energy, meanwhile, the kinetic energy generated by the propeller can be transmitted to the rotating rod through a series of structures such as a rotating shaft, and the like, and finally transmitted to the rotating rod, when the rotating rod rotates, the first auger and the second auger can be driven to rotate, the water flow at two sides behind the vertical pipe can be disturbed through the rotating action of the first auger and the second auger, thereby avoiding the vortex vibration phenomenon, and because the device is connected with the vertical pipe through the bearing, no matter what kind of change occurs in the direction of the water flow, the first auger and the second auger can be always positioned at the vortex position behind the vertical pipe, thereby destroying the tail flow vortex of the vertical pipe, avoiding the vortex vibration phenomenon from the root source, the device simple structure, and need not to connect the electricity, the energy of using nature completely then can drive the device operation, very be worth promoting.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
FIG. 1: the invention discloses a perspective view of the whole device;
FIG. 2: the invention relates to a front sectional view of a cross beam and a vertical beam;
FIG. 3: the invention relates to a left view section of a vertical beam and a connecting plate;
FIG. 4: the cross beam is partially in a sectional top view;
FIG. 5: the mounting ring of the invention is in a left side sectional view;
FIG. 6: the invention is illustrated in the enlarged detail at a in fig. 2.
The reference numbers are as follows:
1. erecting a beam; 2. a riser; 3. a cross beam; 4. a transverse plate; 5. a connecting plate; 6. a rotating shaft; 7. a propeller; 8. a first helical gear; 9. a second helical gear; 10. a connecting rod; 11. a first driving tooth; 12. a transmission assembly; 121. a transmission rod; 122. a driving wheel; 123. a first driven tooth; 124. a second driving tooth; 125. a driven wheel; 13. a rotating rod; 14. an oil filling pipe; 15. a first auger; 16. a second auger; 17. a mounting ring; 18. a waterproof bearing; 19. rotating the barrel; 20. pipe rotation; 21. a second driven tooth; 22. a first rotary shaft seal; 23. a second rotary shaft seal; 24. a third rotary shaft seal member; 25. a shield.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-6, a vertical pipe vibration suppression device with a guard inner strake and impeller combined to rotate comprises a vertical beam 1 and a vertical pipe 2, wherein a cross beam 3 is welded at the top of the vertical beam 1, a transverse plate 4 is welded at the bottom of the vertical beam 1, a connecting plate 5 is welded at the front of the vertical beam 1, the inner wall of the connecting plate 5 is rotatably connected with a rotating shaft 6, one end of the rotating shaft 6 penetrates through the outside of the connecting plate 5, and one end of the rotating shaft 6 is fixedly provided with a propeller 7;
the other end of the rotating shaft 6 penetrates into the vertical beam 1, a first helical gear 8 is fixedly mounted at the other end of the rotating shaft 6, a second helical gear 9 is meshed with the back surface of the first helical gear 8, a connecting rod 10 is fixedly mounted on the inner wall of the second helical gear 9, the bottom of the connecting rod 10 is rotatably connected with the inner wall of the vertical beam 1, the top of the connecting rod 10 penetrates into the cross beam 3, the top of the connecting rod 10 is rotatably connected with the inner wall of the cross beam 3, a first driving tooth 11 is fixedly mounted at the upper end of the surface of the connecting rod 10, and transmission assemblies 12 are arranged on two sides of the first driving tooth 11;
the both sides at 3 inner chambers tops of crossbeam all rotate and are connected with bull stick 13, the outside of crossbeam 3 is run through to the bottom of bull stick 13, the bottom fixed mounting of bull stick 13 has first hank dragon 15, the bottom fixed mounting of first hank dragon 15 has second auger 16, the spiral direction of first hank dragon 15 and second auger 16 sets up for opposite, stability when this kind of design can increase equipment operation, because can produce reaction force at the in-process of first hank dragon 15 and the 16 drainage of second auger, consequently, the spiral direction of first hank dragon 15 and second auger 16 sets up for opposite, can offset the reaction force that produces.
Preferably, the collar 17 has all been welded to the back of crossbeam 3 and diaphragm 4, the inner wall fixed mounting of collar 17 has waterproof bearing 18, waterproof bearing 18's inner circle fixed mounting is on the surface of riser 2, through collar 17 and waterproof bearing 18's setting, no matter what kind of change takes place for the direction of rivers, first auger 15 and second auger 16 can be located the swirl department at riser 2 rear all the time, thereby destroy the wake vortex of riser 2, avoid the emergence of vortex phenomenon from root cause department.
Preferably, the transmission assembly 12 includes a transmission rod 121, both ends of the transmission rod 121 are rotatably connected with the inner wall of the cross beam 3, a driving wheel 122, a first driven tooth 123 and a second driving tooth 124 are respectively and fixedly mounted on the surface of the transmission rod 121, the first driven tooth 123 is engaged with the first driving tooth 11, a steel belt is wound on the surface of the driving wheel 122, the driving wheel 122 is connected with a driven wheel 125 through the steel belt, and the driven wheel 125 is fixedly mounted on the surface of the rotating rod 13.
Preferably, the rotating rod 13 is located inside the rotating pipe 20, the surface of the rotating rod 13 is sleeved with a first rotating shaft sealing element 22, the surface of the first rotating shaft sealing element 22 is fixedly installed on the inner wall of the rotating pipe 20, and the sealing performance between the rotating rod 13 and the rotating pipe 20 can be improved and lubricating oil leakage can be prevented through the arrangement of the first rotating shaft sealing element 22.
Preferably, the second rotary shaft sealing member 23 is fitted over the surface of the rotary pipe 20, the surface of the second rotary shaft sealing member 23 is fixedly attached to the inner wall of the cross member 3, and the second rotary shaft sealing member 23 is provided to increase the sealing performance between the rotary pipe 20 and the cross member 3 and prevent the leakage of the lubricant.
Preferably, the third rotary shaft sealing member 24 is fitted around the surface of the rotary shaft 6, the surface of the third rotary shaft sealing member 24 is fixedly attached to the inner wall of the connecting plate 5, and the third rotary shaft sealing member 24 is provided to provide sealing between the rotary shaft 6 and the connecting plate 5, thereby preventing leakage of the lubricant.
Preferably, the right side fixed mounting of connecting plate 5 has protection casing 25, and screw 7 is located the inside of protection casing 25, through the setting of protection casing 25, can protect screw 7, avoids winding such as pasture and water on screw 7 to can also avoid screw 7 to cause the injury to fish.
Preferably, the top of crossbeam 3 communicates has oiling pipe 14, and the top threaded connection of oiling pipe 14 has the tube cap, and the setting of oiling pipe 14 can conveniently pour into lubricating oil into the device inside to lifting means's life.
A vertical pipe vibration suppression device with a screen panel and an impeller rotating in a combined mode comprises a using method of the vertical pipe vibration suppression device
The method comprises the following steps:
s1: when water flows, the propeller 7 can be driven to rotate, when the propeller 7 rotates, the rotating shaft 6 can be driven to rotate, when the rotating shaft 6 rotates, the first helical gear 8 can be driven to rotate, the first helical gear 8 drives the second helical gear 9 to rotate, and the second helical gear 9 drives the connecting rod 10 to rotate;
s2: the connecting rod 10 drives the first driving tooth 11 to rotate, the first driving tooth 11 drives the first driven tooth 123 to rotate, the first driven tooth 123 drives the transmission rod 121 to rotate, the transmission rod 121 can synchronously drive the driving wheel 122 and the second driving tooth 124 to rotate when rotating, and the driving wheel 122 can drive the driven wheel 125 to rotate through the steel belt;
s3: driven wheel 125 drives bull stick 13 rotatory, and bull stick 13 drives first auger 15 rotatory, and first auger 15 drives second auger 16 rotatory, can form the vortex of riser 2 both sides wake through the effect of first auger 15 and second auger 16 and destroy to avoid the emergence of vortex phenomenon of shaking.
One embodiment of the present invention is:
referring to the attached drawings 1-2, the top of the transverse plate 4 is rotatably connected with a rotary barrel 19, a hole is formed in the surface of the rotary barrel 19, the bottom of the second packing auger 16 is rotatably connected with the inner wall of the rotary barrel 19, a rotary pipe 20 is fixedly installed at the top of the rotary barrel 19, the top of the rotary pipe 20 penetrates through the inner cavity of the transverse beam 3, a second driven tooth 21 is fixedly installed on the surface of the rotary pipe 20, the second driven tooth 21 is meshed with a second driving tooth 124, the rotary barrel 19 is arranged in the device in a matching manner, the purpose of the device is not only to prevent aquatic weeds from being wound on the first packing auger 15 and the second packing auger 16, but also to drive the second driven tooth 21 to rotate when the second driving tooth 124 rotates, the second driven tooth 21 drives the rotary pipe 20 to rotate, the rotary barrel 20 drives the rotary barrel 19 to rotate, and when the second driving tooth 124 is in forward rotation, the second driven tooth 21 is in reverse rotation, but when the second driving tooth 124 is in forward rotation, the driving wheel 122 is also in a forward rotation state, because the two components are installed on the transmission rod 121 together, when the driving wheel 122 rotates forward, the driven wheel 125 can be driven to rotate forward synchronously, and the driven wheel 125 drives the first auger 15 and the second auger 16 to rotate forward, so that the conclusion can be drawn that the rotation directions of the first auger 15 and the rotating barrel 19 are opposite, and by adopting the design mode, the water flow behind the vertical pipe 2 can be further disturbed, so that the vortex vibration can be eliminated by the first auger 15 and the second auger 16.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A vertical pipe vibration suppression device and method for combined rotation of a strake and an impeller in a mesh enclosure are characterized in that: the novel vertical beam structure comprises a vertical beam (1) and a vertical tube (2), wherein a cross beam (3) is welded at the top of the vertical beam (1), a transverse plate (4) is welded at the bottom of the vertical beam (1), a connecting plate (5) is welded at the front of the vertical beam (1), the inner wall of the connecting plate (5) is rotatably connected with a rotating shaft (6), one end of the rotating shaft (6) penetrates through the outer part of the connecting plate (5), and a propeller (7) is fixedly mounted at one end of the rotating shaft (6);
the other end of the rotating shaft (6) penetrates through the inside of the vertical beam (1), a first helical gear (8) is fixedly mounted at the other end of the rotating shaft (6), a second helical gear (9) is meshed with the back face of the first helical gear (8), a connecting rod (10) is fixedly mounted on the inner wall of the second helical gear (9), the bottom of the connecting rod (10) is rotatably connected with the inner wall of the vertical beam (1), the top of the connecting rod (10) penetrates through the inside of the cross beam (3), the top of the connecting rod (10) is rotatably connected with the inner wall of the cross beam (3), a first driving tooth (11) is fixedly mounted at the upper end of the surface of the connecting rod (10), and transmission assemblies (12) are arranged on two sides of the first driving tooth (11);
crossbeam (3) inner chamber top both sides all rotate and are connected with bull stick (13), the outside of crossbeam (3) is run through to the bottom of bull stick (13), the bottom fixed mounting of bull stick (13) has first auger (15), the bottom fixed mounting of first auger (15) has second auger (16), the spiral direction of first auger (15) and second auger (16) sets up for opposite.
2. The device and method of claim 1 for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller, wherein: the back of crossbeam (3) and diaphragm (4) all welds there is collar (17), the inner wall fixed mounting of collar (17) has waterproof bearing (18), the inner circle fixed mounting of waterproof bearing (18) is on the surface of riser (2).
3. The device and method of claim 1 for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller, wherein: drive assembly (12) are including transfer line (121), the both ends of transfer line (121) all rotate with the inner wall of crossbeam (3) and are connected, the surface of transfer line (121) fixed mounting respectively has action wheel (122), first driven tooth (123) and second drive tooth (124), first driven tooth (123) and first drive tooth (11) meshing, the surface of action wheel (122) is around being equipped with the steel band, action wheel (122) are connected with from driving wheel (125) through the steel band transmission, from driving wheel (125) fixed mounting on the surface of bull stick (13).
4. The device and method of claim 3 for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller, wherein: the top of diaphragm (4) is rotated and is connected with and changes bucket (19), the hole has been seted up on the surface of changeing bucket (19), the bottom of second auger (16) is rotated with the inner wall of changeing bucket (19) and is connected, the top fixed mounting who changes bucket (19) has commentaries on classics pipe (20), the inner chamber of crossbeam (3) is run through to the top of commentaries on classics pipe (20), the fixed surface of commentaries on classics pipe (20) installs the driven tooth of second (21), the driven tooth of second (21) and the meshing of second initiative tooth (124).
5. The device and method of claim 4 for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller, wherein: the rotating rod (13) is located inside the rotating pipe (20), a first rotating shaft sealing element (22) is sleeved on the surface of the rotating rod (13), and the surface of the first rotating shaft sealing element (22) is fixedly installed on the inner wall of the rotating pipe (20).
6. The device and method of claim 4 for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller, wherein: the surface of the rotating pipe (20) is sleeved with a second rotating shaft sealing element (23), and the surface of the second rotating shaft sealing element (23) is fixedly installed on the inner wall of the cross beam (3).
7. The device and method of claim 1 for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller, wherein: and a third rotating shaft sealing element (24) is sleeved on the surface of the rotating shaft (6), and the surface of the third rotating shaft sealing element (24) is fixedly installed on the inner wall of the connecting plate (5).
8. The device and method of claim 1 for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller, wherein: the right side fixed mounting of connecting plate (5) has protection casing (25), screw (7) are located the inside of protection casing (25).
9. The device and method of claim 1 for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller, wherein: the top of the cross beam (3) is communicated with an oil filling pipe (14), and the top of the oil filling pipe (14) is in threaded connection with a pipe cover.
10. The apparatus and method for damping vibration of a vertical pipe rotating with a combination of a meshed enclosure inner strake and an impeller according to any one of claims 1 to 9, wherein: the using method comprises the following steps:
s1: when water flows, the propeller (7) can be driven to rotate, the rotating shaft (6) can be driven to rotate when the propeller (7) rotates, the rotating shaft (6) can drive the first helical gear (8) to rotate when rotating, the first helical gear (8) drives the second helical gear (9) to rotate, and the second helical gear (9) drives the connecting rod (10) to rotate;
s2: the connecting rod (10) drives the first driving tooth (11) to rotate, the first driving tooth (11) drives the first driven tooth (123) to rotate, the first driven tooth (123) drives the transmission rod (121) to rotate, the transmission rod (121) can synchronously drive the driving wheel (122) and the second driving tooth (124) to rotate when rotating, and the driving wheel (122) can drive the driven wheel (125) to rotate through the steel belt;
s3: the driven wheel (125) drives the rotating rod (13) to rotate, the rotating rod (13) drives the first packing auger (15) to rotate, the first packing auger (15) drives the second packing auger (16) to rotate, and the vortexes of the wake flows on the two sides of the vertical pipe (2) can be destroyed through the action of the first packing auger (15) and the second packing auger (16), so that the vortex vibration phenomenon is avoided.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828219.0A CN113529639B (en) | 2021-07-22 | 2021-07-22 | Vertical pipe vibration suppression device and method for combined rotation of strake and impeller in mesh enclosure |
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| CN202110828219.0A CN113529639B (en) | 2021-07-22 | 2021-07-22 | Vertical pipe vibration suppression device and method for combined rotation of strake and impeller in mesh enclosure |
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