CN107477130A - A kind of vibration absorber and its oscillation damping method for marine shafting - Google Patents
A kind of vibration absorber and its oscillation damping method for marine shafting Download PDFInfo
- Publication number
- CN107477130A CN107477130A CN201710568394.4A CN201710568394A CN107477130A CN 107477130 A CN107477130 A CN 107477130A CN 201710568394 A CN201710568394 A CN 201710568394A CN 107477130 A CN107477130 A CN 107477130A
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- vibration
- damping
- vibration damping
- axle
- cover
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention discloses a kind of vibration absorber for marine shafting, bulkhead including axle and support shaft, 2 axle sleeves of axial isolation are housed between the axle and bulkhead from the cylindrical outside fixed cover successively of axle, 2 bearings, 1 tubular Base body and vibration damping cover, wherein described vibration damping cover is tightly connected to form sealing ring cavity body with the Base body, the disconnected section of the ring cavity body is circular arc taper, the circular arc conical top is provided with flange, flange one end, which is fixed to be embedded with, is provided with some through holes and the circular ring type vibration damping thin slice stretched into the ring cavity body, the other end is mutually fixedly connected with the bulkhead；The oiling valve and deflation valve connected in the ring cavity body is provided with the cover of the vibration damping cover, damping oil is filled with the ring cavity body.The present invention is combined using vibration damping thin slice and porous plate, and vibration damping is realized by the damping of damping oil, simple in construction, convenient disassembly, by changing vibration damping thin slice, is applicable different vibration operating modes, service life length.
Description
Technical field
The present invention relates to a kind of vibration absorber for marine shafting, is specifically related to a kind of pulsed for marine shafting and subtracts
Shake pedestal and its oscillation damping method, belongs to marine shafting antivibration area.
Background technology
Marine shafting vibration is one of main source of ship noise excitation, and it is to cause ship to move that shafting vibration is excessive
One of the main reason for power shortened equipment life.In mechanical transmission course, marine shafting is a kind of important in plant equipment
Parts.The engine of ship can produce the vibration of different frequency under different rotating speeds, and vibration is delivered to hull by shafting
Structure, because traditional shafting vibration damping frequency range is narrower, it is impossible to effectively absorb vibrational energy, vibrate the safety to ship equipment
Serious potential safety hazard is constituted, and low-frequency vibration can penetrate cabin, influence the comfortableness of ship's staff's Working Life, axle
Ship Structure noise caused by system's vibration can also weaken the hidden ability of military naval vessel, submarine.Meanwhile ship is in the process of running
Also a little vibrations can be produced, are delivered to by bulkhead on power transmission shaft, the operation to engine impacts.
At present, marine shafting vibration damping has a variety of methods, but all various degrees the defects of.Patent CN105840729A
One kind is disclosed with shafting bearing snubber base is taken into account, it includes four bearing block, vibration damping cover, bearing, dust ring main portions
Point.Snubber base is arranged on power transmission shaft, vibration damping cover woven wire block is caused when being driven shaft vibration under load effect, silk
Between dry-friction damping produced due to sliding, so as to absorb the vibrational energy with dissipative system, play a part of buffering and vibration isolation.
But the device must reach high frequency in vibration so that the contact surface positive pressure of silk screen reaches a certain amount, woven wire
Block sliding phenomenon could occur, and frictional damping could consume vibrational energy.If positive pressure is inadequate, woven wire can only produce quiet
Frictional force, sliding phenomenon are not in that device does not just have effectiveness in vibration suppression.And the device cannot change parts and deacclimatize difference
Vibration damping operating mode.Therefore, the vibration absorber sensitivity of the patent is relatively low and the different operating mode abilities of adaptation are weaker, can only centering high frequency vibrating
Dynamic frequency has absorption, and for low-frequency vibration without what effect, and have inside the vibration damping cover of the device very big by one
Segment space fails to utilize well, occupies the confined space of enging cabin.
It is red according to Institutes Of Technology Of Changsha He Shang《Combined pressure pulsation dampening attenuation characteristic》Article understand, thin slice with
The attenuator structure of porous plate composition can effectively absorb the pulsating force as caused by liquid vibration, combined pressure pulsation dampening
Structure is in the range of the pulsation of 0-100Hz frequencies, and insertion loss average is in 5dB or so；In 230-460Hz and 600-1000Hz frequencies
In the range of rate, decay average is in more than 15dB.So thin slice can effectively absorb vibration force with perforated plate construction.
The content of the invention
The invention aims to solve technical problem existing for prior art and defect, there is provided a kind of vibration damping bandwidth
Be used for marine shafting vibration absorber.
To reach above-mentioned purpose, the present invention realizes that purpose is adopted the technical scheme that：
A kind of vibration absorber for marine shafting, include axle 18 and support the bulkhead 10 of the axle 18, the axle 18 with
1,2,2 axle sleeves, 17,1, the bearing cylinder of axial isolation is housed between the bulkhead 10 from the cylindrical outside fixed cover successively of axle 18
Shape shape Base body 2 and vibration damping cover 3, wherein the vibration damping cover 3 is tightly connected with the Base body 2 forms sealing ring cavity
Body, the disconnected section of the ring cavity body is circular arc taper, and the circular arc conical top is provided with flange, and flange end fixes setting-in
Some through holes and the circular ring type vibration damping thin slice 4 stretched into the ring cavity body are provided with, the other end is fixed with the phase of bulkhead 10
Connection；The oiling valve 5 and deflation valve 13 connected in the ring cavity body, institute are provided with the cover of the vibration damping cover 3
State and damping oil 19 is filled with ring cavity body.
The vibration damping cover 3 by two hemispherical mirrors for being provided with centre bore as pairing is formed, wherein, the centre bore is to peripheral hardware
Outer convex shoulder is equipped with, is fixedly connected by bottom bolts 15 and sealing ring C16 with Base body 2, on the end face of the pairing outwards
Outer convex shoulder is provided with, is fixedly connected by fixing bolt A6, sealing ring A8 and fixing nut A12, wherein vibration damping cover 3 is right
Hemispherical evagination shoulder height passes through fixing bolt B7, sealing ring B9 and fixing nut B11 and cabin in the outer convex shoulder in left hemisphere face
Wall 10 is fixedly connected.
The vibration damping cover 3 is formed by inside and outside two layers, and thickness 3-5mm, wherein outer layer are stainless steel, and internal layer is galvanized steel
The porous plate 14 of matter.
The percent opening of the porous plate 14 is 5%-10%, aperture 1-1.5mm.
The through-hole aperture that the vibration damping thin slice 4 is provided with is 3-4mm, and the spacing of adjacent holes is 5 times of aperture, and percent opening is
5%-10%, thickness 0.05-0.1mm.
The material of the vibration damping thin slice 4 is manganese alloy steel.
The damping oil 19 is with wear-resistant, antioxygen, antirust and preferable to the compatibility of sealed elastic thing, and with good
Good low temperature flow and outstanding viscous warm nature, can choose 32#, 46# or the damping oil of other suitable types.
The filling rate of the damping oil 19 is 75%-80%.
To reach above-mentioned purpose, the present invention realizes that another technical scheme that purpose is taken is：
A kind of oscillation damping method of vibration absorber for marine shafting, concrete mode are as follows：
(A) when the axle 18 operates, the vibration of axle 18 is delivered on axle sleeve 1, causes the damping oil 19 inside vibration damping cover 3 to shake
Dynamic, damping oil 19 causes the forced vibration of vibration damping thin slice 4, and vibration damping thin slice 4 produces vibration and deformation under fluid pulsation pressure, when it
Damping force F is directly proportional to the first power of speed, i.e.,:F=- γ ν, the power of damping force F is P=F ν=- γ ν2＜ 0, damping
Power is doing negative work always, so as to which the mechanical energy on vibration damping thin slice 4 is constantly converted into heat energy, realizes vibration damping；
(B) axle 18 vibrates the resonance for causing liquid, and damping oil 19 is ceaselessly being pulsed, and damping oil 19 can be porous
Flowing is passed in and out in plate 14, that is, is similar to and is doing piston movement so that the hole wall of damping oil 19 and porous plate 14 produces friction, so as to
The mechanical energy of pulsation is converted into interior energy, realizes vibration damping.
Compared with prior art, possessed advantage and beneficial effect essentially consist in the present invention：
1st, vibration absorber of the invention has used vibration damping thin slice and perforated plate construction to carry out vibration damping, and vibration absorber is in low frequency
Vibration damping amount can reach 8dB or so, can reach 12dB or so in medium-high frequency vibration damping amount, pass through vibration damping thin slice and porous plate vibration damping group
Close, the vibration damping frequency band of acquisition is wider, takes into account senior middle school's low-frequency vibration of shafting well, is adapted to the vibration operating mode for applying to complexity
Under；
2nd, the adaptivity of vibration absorber of the invention is preferable, in the case of other parameter constants, by changing vibration damping
The thickness of thin slice can obtain broader vibration damping frequency range,
3rd, vibration damping thin slice and porous plate material damping property be reliable and long working life；
4th, damping device structure of the invention is simple, convenient disassembly, is easily changed parts.
Brief description of the drawings
Fig. 1 is the assembling section of the embodiment of the present invention；
Fig. 2 is the partial enlarged drawing of the embodiment of the present invention；
Fig. 3 is the profile of vibration damping cover of the embodiment of the present invention；
Fig. 4 is the top view of vibration damping cover of the embodiment of the present invention；
Fig. 5 is axle sleeve schematic diagram of the embodiment of the present invention；
Fig. 6 is oiling valve schematic diagram of the embodiment of the present invention；
Fig. 7 is vibration damping thin slice schematic diagram of the embodiment of the present invention；
In figure：1st, axle sleeve；2nd, Base body；3rd, vibration damping cover；4th, vibration damping thin slice；5th, oiling valve；6th, fixing bolt A；7、
Fixing bolt B；8th, sealing ring A；9th, sealing ring B；10th, bulkhead；11st, fixing nut B；12nd, fixed spiral shell nut A；13rd, vent valve
Door；14th, porous plate；15th, bottom bolts；16th, sealing ring C；17th, bearing；18th, axle；19th, damping oil.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail, the present invention is furture elucidated, it should be understood that these realities
Example is applied to be only illustrative of the invention and is not intended to limit the scope of the invention, after the present invention has been read, people in the art
Modification of the member to the various equivalent form of values of the present invention falls within the application appended claims limited range.
As shown in Figures 1 to 7：For a kind of vibration absorber for marine shafting of the embodiment of the present invention, including the He of axle 18
The bulkhead 10 of the axle 18 is supported, a pair of tops are set with the axle 18 and set threaded axle sleeve 1, interior mounting surface is thread conical
The bearing 17 of shape is arranged on axle sleeve 1, and the outer sheath of bearing 17 is equipped with cylindric Base body 2, the inner wall thickness of Base body 2
Difference, to hinder bearing 17 to be slided on axle 18, a pair of bottoms of vibration damping cover 3 are sleeved on the outside of Base body 2, vibration damping cover 3 bottom of to
One layer of porous plate 14 is pasted on inwall, vibration damping cover 3 is fixed on the Base body 2 by bottom bolts 15 and sealing ring C16
External cylindrical surface on so that vibration damping cover 3 and snubber base 2 form a seal cavity, and the He of oiling valve 5 is provided with vibration damping cover 3
Deflation valve 13, by oiling valve 5 toward filling damping oil 19 in seal cavity and by deflation valve 13 by the sky in cavity
Gas is discharged, and has an annulus being fixed by fixing bolt A6, sealing ring A8 and fixing nut A12 between vibration damping cover 3
Type vibration damping thin slice 4, circular ring type vibration damping thin slice 4 are placed in seal cavity, need to be integrally immersed in damping oil 19, vibration damping cover 3 right half
While it is fixed on by fixing bolt B7 and sealing ring B9 and fixing nut B11 above bulkhead 10.
The thickness of vibration damping thin slice 4 in the vibration damping cover 3 takes 0.05-0.1mm, and the diameter of the oilhole of design should be less than resonance wave
Long λr/ 12, diameter d are generally 3-4mm, and adjacent pitch of holes typically takes 5 times of bore dia, and the punching rate of oilhole is 5%-10%.
The diameter of porous plate 15 equally should be less than resonant wavelength λr/ 12, aperture D are 1-1.5mm, and punching rate is about 5%-10%.
The damping oil 19 injects the seal cavity being made up of vibration damping cover 3 and snubber base 2, vibration damping by oiling valve 5
Oily 19 wear-resistant, anti-oxidant, antirusts and preferable to the compatibility of sealed elastic thing, and require that damping oil 19 has good low temperature stream
Dynamic property and outstanding viscous warm nature.
Wherein, the thickness of vibration damping cover 3 is 3-5mm, and internal layer has pasted porous plate 15, and the diameter D in hole is 1-1.5mm.
The material of the Base body 2 is cast iron.
It is used for each preferably 6 of two row's screwed holes for fixing two vibration damping covers 3 on the external cylindrical surface of Base body 2.
The vibration damping cover 3 is stainless steel, and the right half of fixing end of vibration damping cover 3 is longer than left half of fixing end.
The right half of top of vibration damping cover 3 and bottom fixing end are provided with screwed hole, its aperture respectively at fixing bolt B7 with
And fixing bolt A6 diameters are identical, the left half of fixing end of vibration damping cover 3 opens screwed hole, and its aperture is identical with fixing bolt A6 diameters.
The bottom fixing end of vibration damping cover 3 answers preferred bolt hole count, and its aperture matches with the bolt aperture of Base body 2
Close.
The material of the vibration damping thin slice 4 is manganese alloy steel, and vibration damping thin slice 4 fixes bore dia should be with fixing bolt A6 diameter phases
Coordinate.
The material of the porous plate 15 is galvanized steel.
The damping oil 19 injects cavity by oiling valve 5, and injection rate is about the 75%-80% of cavity volume.
Operation principle：
1st, when axle 18 operates, the vibration of axle 18 is delivered on axle sleeve 1, is caused the damping oil 19 inside vibration damping cover 3 to rock, is subtracted
Shake oil 19 cause the forced vibration of vibration damping thin slice 4, vibration damping thin slice 4 is produced under fluid pulsation pressure vibration and deformation, damping force F and
The first power of speed is directly proportional then:F=- γ ν, the power of damping force is P=F ν=- γ ν2＜ 0, it is known that damping force exists always
Negative work is done, the mechanical energy on vibration damping thin slice 4 is constantly converted into heat energy.
2nd, axle 18 vibrates the resonance for causing liquid, and damping oil 19 is ceaselessly being pulsed, and damping oil 19 can be in porous plate 15
Middle disengaging, which is similar to, is doing piston movement so that the hole wall of damping oil 19 and porous plate 14 produces friction, by the mechanical energy of pulsation
Be converted to interior energy.The fluctuation of the low frequency of liquid can be made reduce using the structure of itself simultaneously, whole snubber base structure has
Wider filtered band, shafting vibration can be effectively reduced.
3rd, the design for the shafting bearing snubber base parameter of ship bulkhead should meet structural strength and pressure-bearing stability
Requirement.When mounted, vibration damping thin slice 4 described in reasonable selection, and is 3-4mm's stamping aperture d on vibration damping thin slice 4
Hole.Porous plate 14 will select resistant material, and punching rate will determine according to the volume of the cavity of reality, the diameter in each hole
D is about 1-1.5mm.
The Base body size can be determined according to the diameter of vibration frequency and axle on actual axle in specific implementation, with
And the volume of vibration damping cover 3.
The intercalation of vibration damping thin slice 4 enters the junction of vibration damping cover 3 and with fixing bolt A6, sealing ring A8 and fixation in specific implementation
Nut A12 is fastened, and avoids the vibration performance of vibration damping thin slice 4 from weakening.
In addition to the implementation, the present invention can also have other embodiment, all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (9)
1. a kind of vibration absorber for marine shafting, including axle (18) and the bulkhead (10) of the support axle (18), the axle
(18) between the bulkhead (10) from axle (18) it is cylindrical outwards successively fixed cover equipped with axial isolation 2 axle sleeves (1), 2
Bearing (17), 1 tubular shape Base body (2) and vibration damping cover (3), it is characterised in that：The vibration damping cover (3) and the pedestal master
Body (2) is tightly connected and forms sealing ring cavity body, and the disconnected section of the ring cavity body is circular arc taper, the circular arc taper
Top is provided with flange, and it is thin that flange end fixes the circular ring type vibration damping that setting-in is provided with some through holes and stretched into the ring cavity body
Piece (4), the other end are mutually fixedly connected with the bulkhead (10)；The connection ring-type is provided with the cover of the vibration damping cover (3)
Oiling valve (5) and deflation valve (13) in cavity body, damping oil (19) is filled with the ring cavity body.
2. the vibration absorber according to claim 1 for marine shafting, it is characterised in that：The vibration damping cover (3) is by two
The individual hemispherical mirror for being provided with centre bore is formed as pairing, wherein, the centre bore is outwards provided with outer convex shoulder, passes through bottom bolts
(15) it is fixedly connected with sealing ring C (16) with Base body (2), outer convex shoulder is outwards provided with the end face of the pairing, is passed through
Fixing bolt A (6), sealing ring A (8) and fixing nut A (12) are fixedly connected, and wherein vibration damping cover (3) is right hemispherical
Evagination shoulder height passes through fixing bolt B (7), sealing ring B (9) and fixing nut B (11) and bulkhead in the outer convex shoulder in left hemisphere face
(10) it is fixedly connected.
3. the vibration absorber according to claim 1 or 2 for marine shafting, it is characterised in that：The vibration damping cover (3) by
Inside and outside two layers of composition, wherein thickness 3-5mm, outer layer are stainless steel, and internal layer is the porous plate (14) of galvanized steel material.
4. the vibration absorber according to claim 3 for marine shafting, it is characterised in that：Porous plate (14) are opened
Porosity is 5%-10%, aperture 1-1.5mm.
5. the vibration absorber according to claim 1 for marine shafting, it is characterised in that：The vibration damping thin slice (4) is opened
Some through-hole apertures are 3-4mm, and the spacing of adjacent holes is 5 times, percent opening 5%-10%, thickness 0.05- of aperture
0.1mm。
6. it is used for the vibration absorber of marine shafting according to claim 1 or 5, it is characterised in that：The vibration damping thin slice (4)
Material be manganese alloy steel.
7. the vibration absorber according to claim 1 for marine shafting, it is characterised in that：The damping oil (19) is
32# or 46# damping oils.
8. the vibration absorber for marine shafting according to claim 1 or 7, it is characterised in that：The damping oil (19)
Filling rate be 75%-80%.
9. a kind of oscillation damping method of vibration absorber for marine shafting according to claim any one of 1-8, its feature
It is that concrete mode is as follows：
(A) during axle (18) operating, the vibration of axle (18) is delivered on axle sleeve (1), causes the internal damping oil of vibration damping cover (3)
(19) rock, damping oil (19) causes vibration damping thin slice (4) forced vibration, and vibration damping thin slice (4) produces under fluid pulsation pressure to shake
Dynamic and deformation, when its damping force F is directly proportional to the first power of speed, i.e.,:F=- γ ν, the power of damping force F for P=F ν=-
γν2＜ 0, damping force is doing negative work always, and so as to which the mechanical energy on vibration damping thin slice (4) is constantly converted into heat energy, realization subtracts
Shake；
(B) axle (18) vibration causes the resonance of liquid, and damping oil (19) is ceaselessly being pulsed, and damping oil (19) can be more
Disengaging flowing in orifice plate (14), that is, it is similar to and is doing piston movement so that the hole wall of damping oil (19) and porous plate (14) produces
Friction, so as to which the mechanical energy of pulsation is converted into interior energy, realize vibration damping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710568394.4A CN107477130B (en) | 2017-07-13 | 2017-07-13 | A kind of vibration absorber and its oscillation damping method for marine shafting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710568394.4A CN107477130B (en) | 2017-07-13 | 2017-07-13 | A kind of vibration absorber and its oscillation damping method for marine shafting |
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| Publication Number | Publication Date |
|---|---|
| CN107477130A true CN107477130A (en) | 2017-12-15 |
| CN107477130B CN107477130B (en) | 2019-06-21 |
Family
ID=60596471
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710568394.4A Active CN107477130B (en) | 2017-07-13 | 2017-07-13 | A kind of vibration absorber and its oscillation damping method for marine shafting |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109159881A (en) * | 2018-10-29 | 2019-01-08 | 集美大学 | A kind of ship thrust bearing device with low frequency vibration isolation effect |
| CN110043596A (en) * | 2019-04-03 | 2019-07-23 | 江苏科技大学 | A kind of thrust bearing energy-consumption damper peculiar to vessel and its assembly method |
| CN114962538A (en) * | 2022-06-22 | 2022-08-30 | 招商局金陵船舶(江苏)有限公司 | Shaft system vibration damping structure and vibration damping method for roll-on-roll-off ship |
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| CN105570375A (en) * | 2015-12-24 | 2016-05-11 | 北汽福田汽车股份有限公司 | Axle sleeve shock absorber and vehicle |
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| CN105840729A (en) * | 2016-04-11 | 2016-08-10 | 江苏科技大学 | Shafting bearing vibration-reducing base for ship bulkhead |
| CN105972145A (en) * | 2016-05-11 | 2016-09-28 | 北汽福田汽车股份有限公司 | Shaft sleeve shock absorber and vehicle |
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| US4469316A (en) * | 1978-01-24 | 1984-09-04 | Audi Nsu Auto Union Ag | Elastomeric mount with hydraulic damping |
| CN1033208A (en) * | 1987-11-17 | 1989-05-31 | 清水建设株式会社 | Effectively suppress the building method and the equipment thereof of disturbance response to external world |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109159881A (en) * | 2018-10-29 | 2019-01-08 | 集美大学 | A kind of ship thrust bearing device with low frequency vibration isolation effect |
| CN110043596A (en) * | 2019-04-03 | 2019-07-23 | 江苏科技大学 | A kind of thrust bearing energy-consumption damper peculiar to vessel and its assembly method |
| CN114962538A (en) * | 2022-06-22 | 2022-08-30 | 招商局金陵船舶(江苏)有限公司 | Shaft system vibration damping structure and vibration damping method for roll-on-roll-off ship |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107477130B (en) | 2019-06-21 |
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Application publication date: 20171215 Assignee: Jiangsu University of Science and Technology Technology Transfer Center Co.,Ltd. Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980022975 Denomination of invention: A damping device for ship shafting and its damping method Granted publication date: 20190621 License type: Common License Record date: 20221128 |
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Assignee: Jiangsu University of Science and Technology Technology Transfer Center Co.,Ltd. Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980022975 Date of cancellation: 20230310 |