CN106114797A - A kind of full-rotating rudder paddle double-layer vibration damping device and method for designing thereof - Google Patents
A kind of full-rotating rudder paddle double-layer vibration damping device and method for designing thereof Download PDFInfo
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- CN106114797A CN106114797A CN201610482689.5A CN201610482689A CN106114797A CN 106114797 A CN106114797 A CN 106114797A CN 201610482689 A CN201610482689 A CN 201610482689A CN 106114797 A CN106114797 A CN 106114797A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/30—Mounting of propulsion plant or unit, e.g. for anti-vibration purposes
- B63H21/305—Mounting of propulsion plant or unit, e.g. for anti-vibration purposes with passive vibration damping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
- B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of full-rotating rudder paddle double-layer vibration damping device, including full-rotating rudder screw stand is installed, multiple along installing the damping block with three-way rigidity that stand upper and lower panel surrounding is evenly arranged, fixing damping block and full-rotating rudder screw being risen the damping block case of position-limiting action, and the base construction etc. of damping block case is installed.This vibration absorber vertical, horizontal, longitudinal direction, torsional direction and coupled vibrations thereof to full-rotating rudder screw can carry out effective vibration damping simultaneously, owing to multiple damping blocks are along installing stand surrounding and dividing a upper and lower two-layer to be evenly arranged, can the most effectively control the damping block deformation caused under input shaft torque and propeller propulsive force effect, both the dynamic deformation problem of rudder oar device power shaft had been reduced, reduce again rudder oar device and be delivered to the vibration of ship stern structure, thus improve operation stability, shipbuilding cost and time can be saved simultaneously.The invention also discloses the method for designing of a kind of full-rotating rudder paddle double-layer vibration damping device.
Description
Technical field
The present invention relates to a kind of full-rotating rudder paddle double-layer vibration damping device and method for designing thereof, particularly relate to a kind of full-rotating rudder
Vertical, horizontal, longitudinal direction, the torsional direction of oar device and the damping technology of coupled vibrations thereof, belong to ship equipment damping technology neck
Territory.
Background technology
Z-propeller tug refers to can be with 360 ° of tugboats rotated freely in original place, and turning to of this boats and ships is flexible, convolution half
Footpath is little, can spin in original place, flexible to operation, and control performance is good, can within a short period of time ship be stopped, and is suitably restricting water supply
Territory is handled.Under normal circumstances, such boats and ships are without the double oar of rudder, at berthing manoeuver, assist big ship by the operations such as pool, can pass through
The angle and the rotating speed that adjust two oars make tugboat make the motion of any direction.Can be traversing in the case of unhurried current is without ship's speed, to this ship
By particularly useful from pool.As long as adjustable screw oar direction during reversing, more more flexible than advancing.Its stern shape is relatively simple, suffered stream
Body resistance is less, and can be hung out without lying up from cabin by complete machine when its propeller breaks down, and makes maintenance mans
It is greatly simplified, adds the service life of boat diesel engine.
Z-propeller tug just develops towards high-power, high-performance direction.Manufacture and design and adapt to modern large ship requirement
High-power, high-performance Z-propeller tug, is the main development direction of Z-propeller tug.Due to Z-propeller tug work mission and
Functional requirement, proposes the highest requirement to the power performance of cabin power set, reliability, maneuverability.Z-propeller tug
Power-equipment kind and large number of, power is big, and at engine room inside characteristics of compact layout, cabin vibration noise problem is the most prominent,
During full load mode, main frame interior noise reaches 110dB (A) left and right.Due to the particularity of ship type, accommodation distance is mainly shaken
Cabin, moving noise source and steering gear flat close together, the vibration noise of cabin and steering gear flat is easy to be delivered to Z-propeller tug
Each main accommodation, its vibration noise, often beyond standard allowable value both domestic and external, has a strong impact on the orthobiosis of crewman.
Main frame, axle system and the full-rotating rudder screw of steering gear flat in cabin, is the primary oscillation source of Z-propeller tug.Entirely
The mode that revolution rudder oar device often uses rigidity to install is directly installed on steering gear flat hull pedestal.On the one hand, return due to complete
The parts such as the internally installed reduction gearing of oar device of coming about, reversing arrangement, hydraulic motor during motion inevitably
Produce vibration exciting force, be then delivered to each cabin of steering gear flat and tugboat by installing pedestal；On the other hand, cabin master
The vibration of machine, axle system and various subsidiary engine also can be delivered to full-rotating rudder screw by Ship Structure, and affect rudder oar device can
By running.
Application No. CN201210154326.0, the patent of invention of entitled " rudder oar noise-and-vibration-reduction mounting structure ", open
A kind of rudder oar noise-and-vibration-reduction mounting structure, the installed surface that rudder oar coordinates with hull well seat is provided with vibration isolator, and vibration isolator is supported in
Coupling on hull well seat and with hull well seat, being connected between rudder oar with hull well seat has sealing gasket.This mounting structure can be well
Weaken and absorb the vibration of rudder oar and noise, improving comfortableness during ship's navigation, be especially suitable for vibration during navigation and
Noise has the boats and ships of particular requirement.Although mounting dampers between the installed surface of full-rotating rudder screw and steering gear flat pedestal,
The vibration transmission between rudder oar device can be reduced in theory.But, even if to a main engine power 680kW, rotating speed
The axle system of 1000r/min, due to during ship's navigation current to propeller produce 100kN magnitude thrust (counteracting force is spiral
The thrust that oar produces), this thrust, at the shaft core position of propeller, is installed with steering gear flat pedestal less than full-rotating rudder screw
The distance of the 1.5 meters of magnitudes in face, the moment of torsion of formation can cause vibroshock to produce the deformation of about 10mm magnitude；Meanwhile, at rudder oar device
Under the moment of torsion of power shaft and the moment of torsion effect of propeller shaft, vibroshock can be caused to produce bigger deformation.This deformation can cause
Produce between the power shaft of line shaft system and rudder oar device and misalign, thus affect the normal fortune of the main Propulsion Systems of boats and ships
OK.Under this mounting means, in order to reduce the deformation of vibroshock, it has to select the vibroshock that rigidity is the biggest, as in order to make
The deformation amount controlling of vibroshock is within 4mm, and the rigidity of vibroshock, by being more than 5 times during conventional type selecting, causes rudder oar device
Vertical natural frequency at more than 20Hz, understands its only perturbed force to 1.4 times of frequencies above according to theory of vibration isolation and just has and subtract
Shaking effect, and the natural frequency of the roll and pitch of rudder oar device vibrating isolation system reaches more than 60Hz especially, vibrating isolation system is such
High natural frequency, drastically influence the effectiveness in vibration suppression of rudder oar device vibrating isolation system.
Therefore, the quiet deflection of vibration isolator in minimizing rudder oar device vibrating isolation system, and reduce the natural frequency of vibrating isolation system,
Become a difficult problem for rudder oar device Vibration Absorbing System Design.Owing to rudder oar device is acted on by while multiple exciting forces, use traditional list
The vibration isolation way (during tradition Vibration Absorption Designing, multiple vibroshocks being arranged in single plane) of layer vibrating isolation system, it is difficult to simultaneously control
Rudder oar device vibroshock deflection and control vibrating isolation system natural frequency.
Summary of the invention
Present invention aim to overcome that and be difficult to simultaneously control flaps oar device vibroshock deflection and to control vibrating isolation system intrinsic
The contradiction of frequency, for realizing improving the effectiveness in vibration suppression of vibrating isolation system, the one invented while controlling vibroshock deflection
Full-rotating rudder paddle double-layer vibration damping device.
For reaching above-mentioned purpose, the present invention realizes purpose and is adopted the technical scheme that: a kind of full-rotating rudder paddle bilayer subtracts
Vibrating device, including base construction 1, installs stand 5 and damping assembly；It is characterized in that: described base construction 1 and installation stand 5
It is upper and lower two ends and connects the cylinder body having centre bore cover plate, and the diameter of described cover plate is more than the diameter of drum, Qi Zhongsuo
State base construction 1 to be provided with on the external diameter being sleeved on described installation stand 5 in gap by the centre bore of upper and lower two end cover plate, described
On base construction about 1 two end cover plate circumferentially face, symmetrical equalization offers several bolts hole, described installation stand about 5 two
End casing circumferentially symmetrical equalization is provided with several flanges, and described damping assembly includes damping block case 3 and damping block 4, wherein
The longitudinal section of described damping block case 3 is inverse-T-shaped, and little fan annular one end, bottom is provided with counterbore, and big fan annular one end is along arc
Length direction is laid with the fan loop configuration body in several holes；Described damping block 4 is that longitudinal section is L-shaped and upper down cross-sectional is equal
In the structure of fan annular, the inner diameter wall Middle face of the most orthogonal upper fan ring block offers and described installation stand 5
The fan loop configuration body of the vertical groove that the flange that two ends panel is provided with up and down matches；The lower fan ring of described damping block 4
Shape block embeds in the counterbore of described damping block case 3, and the bolt hole that is provided with by damping block case 3 and bolt 2 are with described
Stand 5 is installed be connected.
Further, the central angle θ of fan annular described above is 15～30 °.
Further, big fan annular one end longitudinally height d1 of damping block case 3 described above is 20～40mm, and damping block
Counterbore degree of depth d2 that little fan annular one end, bottom of case 3 is provided with is 15～30mm.
Further, the height L1 that damping block 4 described above is fanned ring block is 20～50mm, its internal diameter wall and outside diameter wall
Wall thickness (R1-R2) between face is 20～50mm, and the height L2 of lower fan ring block is 40～80mm.
Further, the material of damping block 4 described above is viscoelasticity macromolecular material, with natural rubber or other macromolecule
Material is that main raw material(s) forms through certain formula and technique sulfuration, and shore hardness is 45 °～75 °.
Further, vertical groove cross section described above is rectangle or fans annular or swallow-tail form.
Further, damping assembly described above is that damping block 4 utilizes damping block case 3 vulcanization forming and with some strength
It is pasted onto in its groove the structure formed, the height L2 of the lower fan ring block of damping block 4 and counterbore degree of depth d2 of damping block case 3
Ratio be 1:(1.5～4).
Further, the quantity that the upper and lower two-layer of damping assembly described above is installed is 8, upper and lower just to installing or dislocation
Described damping assembly is installed.
Further, the quantity having several flange peripheral to be distributed in the installation upper and lower end face of stand 5 described above is 8.
Further, several hole number described above are 3.
Further, several numbers of bolt hole described above are 24, every 3 as 1 group.
For reaching above-mentioned purpose, what the present invention realized that purpose taked another solution is that
The method for designing of a kind of full-rotating rudder paddle double-layer vibration damping device, comprises the following steps:
S1: according to the parameter of dispatching from the factory of full-rotating rudder screw, find its quality be m, rotary inertia I, primary Calculation obtains
The global stiffness of damping block 4Z is frequency ratio (the general span of Z is 2～4), and n is oar rotating speed.
S2: calculate the natural frequency of full-rotating rudder screw six-degree-of-freedom vibration isolation system: solid on Ux, Uy and Uz degree of freedom
The frequency is had to beNatural frequency on Rx, Ry and Rz degree of freedom isFor reversing just
Degree.Judge the vibration isolating effect of vibrating isolation system(as △ > 0 time, there is vibration isolation
Effect)；Wherein, ζ is damping ratio.
S3: the effectiveness in vibration suppression reached according to the global stiffness calculated and needs, calculate damping block 4 parallel connection quantity N and
The rigidity of single damping block 4
S4: according to base construction 1 and the size of installation stand 5 and gap length between the two, determine the tool of damping block 4
Body size and dimension, according to the single calculated rigidity of damping block 4, by looking into Materials Handbook, determines material hardness characteristic.
The full-rotating rudder paddle double-layer vibration damping device of the present invention and method for designing thereof, mainly have prominent in the following aspects
Advantage:
1. by dividing upper and lower two-layer along installing stand 5 lower panel with installation stand 5 top panel circumference by multiple damping blocks 4
The design being evenly arranged, can reduce rudder oar device vibroshock deflection simultaneously and reduce the natural frequency of vibrating isolation system；
2. owing to reducing rudder oar device vibroshock deflection and reducing the natural frequency of vibrating isolation system simultaneously, can be simultaneously to entirely
Vertical, horizontal, longitudinal direction, torsion and the effective vibration damping of coupled vibrations thereof of revolution rudder oar device；
3., after the deformation of damping block 4 is reduced, both improve the stability that full-rotating rudder screw runs, and also extended and subtract
Shake service life of block 4；
4. this vibration absorber can be installed in workshop so that shipbuilding period reduces by 30%, cost savings 30%.
Accompanying drawing explanation
Fig. 1 is full-rotating rudder paddle double-layer vibration damping device top view；
Fig. 2 is that full-rotating rudder paddle double-layer vibration damping device A is to profile；
Fig. 3 is damping block axonometric chart；
Fig. 4 is damping block top view；
Fig. 5 is that damping block B is to sectional view；
Fig. 6 is damping block case axonometric chart；
Fig. 7 is damping block case top view；
Fig. 8 is that damping block case C is to sectional view；
Fig. 9 is damping block case and damping block combination stereogram；
Figure 10 is erecting bed frame axonometric chart；
Figure 11 is for installing stand top view；
Figure 12 is for installing stand D to sectional view；
Figure 13 is base construction top view；
Figure 14 is that base construction E is to sectional view；
Figure 15 is full-rotating rudder screw damping assembly single layer designs Force principle figure；
Figure 16 is full-rotating rudder screw damping assembly double layer design Force principle figure；
In figure: 1 base construction, 2 bolts, 3 damping block cases, 4 damping blocks, 5 installation stands.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, and combine accompanying drawing and case study on implementation,
The present invention is described in further detail.Should be appreciated that the case that is embodied as described herein is used only for explaining this
Invention, is not intended to limit the present invention.
As shown in Figure 1 and Figure 2, a kind of full-rotating rudder paddle double-layer vibration damping device, including base construction 1 (see Figure 13, Figure 14),
Stand 5 (see Figure 10, Figure 11, Figure 12) and damping assembly (see Fig. 9) are installed；It is characterized in that: described base construction 1 and erecting bed
Frame 5 is upper and lower two ends and connects the cylinder body having centre bore cover plate, and the diameter of described cover plate is more than the diameter of drum, wherein
Described base construction 1 is provided with on the external diameter being sleeved on described installation stand 5 in gap by the centre bore of upper and lower two end cover plate, institute
State symmetrical equalization on base construction about 1 two end cover plate circumferentially face and offer several bolts hole, described installation stand about 5
Two end cover plate circumferentially symmetrical equalization is provided with several flanges, and described damping assembly includes that damping block case 3 is (see Fig. 6, Fig. 7, figure
8) and damping block 4 (see Fig. 3, Fig. 4, Fig. 5), the longitudinal section of wherein said damping block case 3 is inverse-T-shaped, and bottom little fan ring
Shape one end is provided with counterbore, and big fan annular one end is laid with the fan loop configuration body in several holes along arc length direction；Described vibration damping
Block 4 is that longitudinal section is L-shaped and upper down cross-sectional is all in the structure of fan annular, the most orthogonal upper fan ring block interior
The fan of the vertical groove that the flange being provided with described installation stand about 5 two ends panel matches is offered in the middle part of the wall of footpath
Loop configuration body；The lower fan ring block of described damping block 4 embeds in the counterbore of described damping block case 3, and by damping block cover
The bolt hole that shell 3 is provided with is connected with described installation stand 5 with bolt 2.
As shown in Fig. 4, Fig. 7, the central angle θ of described fan annular is 15～30 °.
As shown in Figure 8, big fan annular one end longitudinally height d1 of described damping block case 3 is 20～40mm, and damping block
Counterbore degree of depth d2 that little fan annular one end, bottom of case 3 is provided with is 15～30mm.
As shown in Figure 4, Figure 5, the height L1 that described damping block 4 is fanned ring block is 20～50mm, and its internal diameter wall is with outer
Wall thickness (R1-R2) between the wall of footpath is 20～50mm, and the height L2 of lower fan ring block is 40～80mm.
The material of described damping block 4 is viscoelasticity macromolecular material, is main with natural rubber or other macromolecular material
Raw material forms through certain formula and technique sulfuration, and shore hardness is 45 °～75 °.
As shown in Figure 3, Figure 4, described vertical groove cross section is fan annular.
As it is shown in figure 9, described damping assembly is damping block 4 utilizes damping block case 3 vulcanization forming and with some strength
It is pasted onto in its groove the structure formed, the height L2 of the lower fan ring block of damping block 4 and counterbore degree of depth d2 of damping block case 3
Ratio be 1:(1.5～4).
As it is shown in figure 1, the upper and lower two-layer of described damping assembly install quantity be 8, upper and lower just to install described in subtract
Shake assembly.
As shown in Figure 10, Figure 11, have described in several flange peripheral be distributed in install the upper and lower end face of stand 5 quantity equal
It it is 8.
As it is shown in fig. 7, several hole number described are 3.
As shown in figure 13, several numbers of bolt hole described are 24, every 3 as 1 group.
The method for designing of a kind of full-rotating rudder paddle double-layer vibration damping device, comprises the following steps:
S1: according to the parameter of dispatching from the factory of full-rotating rudder screw, find its quality be m, rotary inertia I, primary Calculation obtains
The global stiffness of damping block 4Z is frequency ratio (the general span of Z is 2～4), and n is oar rotating speed.
S2: calculate the natural frequency of full-rotating rudder screw six-degree-of-freedom vibration isolation system: solid on Ux, Uy and Uz degree of freedom
The frequency is had to beNatural frequency on Rx, Ry and Rz degree of freedom isFor reversing just
Degree.Judge the vibration isolating effect of vibrating isolation system(as △ > 0 time, there is vibration isolation
Effect)；Wherein, ζ is damping ratio.
S3: the effectiveness in vibration suppression reached according to the global stiffness calculated and needs, calculate damping block 4 parallel connection quantity N and
The rigidity of single damping block 4
S4: according to base construction 1 and the size of installation stand 5 and gap length between the two, determine the tool of damping block 4
Body size and dimension, according to the single calculated rigidity of damping block 4, by looking into Materials Handbook, determines material hardness characteristic
Assembly technology: a kind of full-rotating rudder paddle double-layer vibration damping device of the present invention, when mounted can be first by full-rotating rudder paddle
It is welded and fixed between device and installation stand 5；Again all damping blocks 4 of lower floor are passed sequentially through spiral shell with damping block case 3 assembly
Bolt 2 is fixed on base construction 1；Subsequently that full-rotating rudder screw is recessed with damping block 4 by installing stand 5 panel boss
Groove is installed behind location, and makes damping block 4 pressurized and keep certain prestressing force；The most again by the damping block 4 on upper strata with subtract
Block case 3 assembly that shakes is in turn mounted to position by bolt 2, and makes damping block 4 pressurized and keep certain prestressing force；Finally by base
The outer of holder structure 1 top panel and base construction 1 lower panel is welded and fixed as entirety respectively with steering gear flat double bottom structure, thus
Achieve the installation of full-rotating rudder paddle vibration absorber.
In a kind of full-rotating rudder paddle double-layer vibration damping device installation process of the present invention, upper strata damping block 4 and lower floor should be made
The uniform force both horizontally and vertically of damping block 4, and guarantee on external arc outer wall and the base construction 1 of damping block case 3
Suitable gap is left, to realize full-rotating rudder screw in extreme forces situation between panel, base construction 1 lower panel
Under spacing and protect damping block 4 not to be destroyed.
Figure 15 is full-rotating rudder screw damping assembly single layer designs Force principle figure, and wherein, H1 is for installing stand 5 lower end
Face, face is to the vertical dimension in propeller axle center, and H2 is the vertical dimension installing stand 5 upper surface to propeller axle center, and R is for installing
Stand 5 drum inside radius.Convenient contrast, if full-rotating rudder screw both sides are respectively symmetrically two damping blocks 4 of installation, at spiral
Under the thrust F effect that oar produces, relative to the stress balance position under action of gravity, the damping block of full-rotating rudder screw both sides
4 respectively by active force both horizontally and vertically, the wherein directed force F of vertical directionV0Size is identical, in opposite direction；Level
The directed force F in directionH0Size is identical with direction, and F=FH0+FH0；Torque equilibrium equation around left side damping block 4 is F H2=
2·FV0·R；Combine and solve above equation group and can try to achieve damping block 4 stress size both horizontally and vertically,.
Figure 16 is full-rotating rudder screw damping assembly double layer design Force principle figure, and wherein, H1 is for installing stand 5 lower end
Face, face is to the vertical dimension in propeller axle center, and H2 is the vertical dimension installing stand 5 upper surface to propeller axle center, and R is for installing
Stand 5 drum inside radius.For convenience of contrast, if full-rotating rudder screw both sides are respectively symmetrically 4 damping blocks of installation up and down,
Under the thrust F effect that propeller produces, relative to the stress balance position under action of gravity, subtracting of full-rotating rudder screw both sides
The block 4 that shakes is subject to active force both horizontally and vertically, the wherein directed force F of left side damping block 4 vertical direction respectivelyV1Size phase
With, direction is upwards；Above Zuo Ce, the active force of damping block 4 horizontal direction is FH1, the effect of damping block 4 horizontal direction below left side
Power is FH2, direction and FH1On the contrary；The directed force F of right side damping block 4 vertical directionV2Size is identical, and direction is downward；Above You Ce
The active force of damping block 4 horizontal direction is FH1, the active force of lower right-hand side damping block 4 horizontal direction is FH2, direction and FH1Phase
Instead；Thus obtain the stress balance equation F+F of horizontal directionH1+FH1=FH2+FH2；The stress balance equation F of vertical directionV1+FV1
=FV2+FV2；Below left side, the torque equilibrium equation of damping block 4 is F H1=2 FV2·2R+2·FH1·(H2-H1)；Around a left side
Above side, the torque equilibrium equation of damping block 4 is F H2=2 FV2·2R+2·FH2·(H2-H1).Combine and solve above equation
Group can try to achieve damping block 4 stress size both horizontally and vertically.Contrast full-rotating rudder screw damping assembly single layer designs and
The Force principle figure of double layer design, it appeared that: under propeller produces identical thrust F effect, with full-rotating rudder screw
The traditional single layer designs scheme of damping assembly is compared, the full-rotating rudder screw damping assembly double layer design side that the present invention proposes
Case, the stress of damping block 4 significantly reduces, and installs the design height H between stand 5 top panel and installation stand 5 lower panel more
Greatly, the stress of damping block 4 is the least.
Claims (9)
1. a full-rotating rudder paddle double-layer vibration damping device, including base construction (1), installs stand (5) and damping assembly；Its feature
It is: described base construction (1) and installation stand (5) are upper and lower two ends and connect the cylinder body having centre bore cover plate, and institute
State the diameter of the cover plate diameter more than drum, between wherein said base construction (1) is provided with by the centre bore of upper and lower two end cover plate
On the external diameter being sleeved on described installation stand (5) of gap, symmetrical equal on described base construction (1) two end cover plate circumferentially face up and down
Etc. offering several bolts hole, described installation stand (5) two end cover plate up and down circumferentially symmetrical equalization is provided with several flanges,
Described damping assembly includes damping block case (3) and damping block (4), and the longitudinal section of wherein said damping block case (3) is inverted " t "
Shape, and little fan annular one end, bottom is provided with counterbore, big fan annular one end is laid with the fan annular in several holes along arc length direction
Structure；Described damping block (4) is that longitudinal section is L-shaped and upper down cross-sectional is all in the structure of fan annular, the most vertical
The inner diameter wall Middle face of straight upper fan ring block offers and described installation stand (5) flange that two ends panel is provided with up and down
The fan loop configuration body of the vertical groove matched；The lower fan ring block of described damping block (4) embeds described damping block case (3)
Counterbore in, and the bolt hole being provided with by damping block case (3) is connected with described installation stand (5) with bolt (2).
A kind of full-rotating rudder paddle double-layer vibration damping device the most according to claim 1, it is characterised in that: the circle of described fan annular
Heart angle θ is 15～30 °.
A kind of full-rotating rudder paddle double-layer vibration damping device the most according to claim 1, it is characterised in that: described damping block case
(3) big fan annular one end longitudinally height d1 is 20～40mm, and little fan annular one end, bottom of damping block case (3) is provided with
Counterbore degree of depth d2 is 15～30mm.
A kind of full-rotating rudder paddle double-layer vibration damping device the most according to claim 1, it is characterised in that: described damping block (4)
The height L1 of upper fan ring block is 20～50mm, and the wall thickness (R1-R2) between its internal diameter wall and external diameter wall is 20～50mm,
The height L2 of lower fan ring block is 40～80mm.
A kind of full-rotating rudder paddle double-layer vibration damping device the most according to claim 1, it is characterised in that: described damping block (4)
Material be viscoelasticity macromolecular material, be main raw material(s) through certain formula with natural rubber or other macromolecular material and
Technique sulfuration forms, and shore hardness is 45 °～75 °.
A kind of full-rotating rudder paddle double-layer vibration damping device the most according to claim 1, it is characterised in that: described vertical groove is horizontal
Cross section is rectangle or fans annular or swallow-tail form.
A kind of full-rotating rudder paddle double-layer vibration damping device the most according to claim 1, it is characterised in that: described damping assembly is
Damping block (4) utilizes damping block case (3) vulcanization forming and is pasted onto in its groove the structure formed, vibration damping with some strength
The height L2 of the lower fan ring block of block (4) is 1:(1.5～4 with the ratio of counterbore degree of depth d2 of damping block case (3)).
A kind of full-rotating rudder paddle double-layer vibration damping device the most according to claim 1, it is characterised in that: described damping assembly
The quantity that upper and lower two-layer is installed is 8, upper and lower just to installing or damping assembly described in arranged in dislocation；Described have several convex
Edge circumference is distributed in the quantity of installation stand (5) upper and lower end face and is 8；Several hole number described are 3；Described some
Individual number of bolt hole is 24, every 3 as 1 group.
The method for designing of a kind of full-rotating rudder paddle double-layer vibration damping device the most according to claim 1, it is characterised in that include
Following steps:
S1: according to the parameter of dispatching from the factory of full-rotating rudder screw, find its quality be m, rotary inertia I, primary Calculation obtains vibration damping
The global stiffness of block (4)Wherein Z is frequency ratio, and the span of Z is 2～4, and n is oar rotating speed；
S2: the natural frequency of calculating full-rotating rudder screw six-degree-of-freedom vibration isolation system: intrinsic frequency on Ux, Uy and Uz degree of freedom
Rate isNatural frequency on Rx, Ry and Rz degree of freedom isFor torsional rigidity,
Judge the vibration isolating effect of vibrating isolation systemWherein when Δ > 0 time, there is vibration isolation
Effect；ζ is damping ratio；
S3: the effectiveness in vibration suppression reached according to the global stiffness calculated and needs, calculates damping block (4) quantity N in parallel and list
The rigidity of individual damping block (4)
S4: according to base construction (1) and the size of installation stand (5) and gap length between the two, determine damping block (4)
Concrete size and dimension, according to single damping block (4) calculated rigidity, by looking into Materials Handbook, determines that material hardness is special
Property.
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| WO2021099478A1 (en) * | 2019-11-19 | 2021-05-27 | Seadrive As | Vibration dampening device for interconnecting an electric propulsion device for a vessel and a hull portion |
| CN117131609A (en) * | 2023-10-24 | 2023-11-28 | 成都思越智能装备股份有限公司 | Dual vibration reduction design method and equipment for AGV body |
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| CN106114797B (en) | 2018-01-30 |
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