CN110219922B - A high static and low dynamic vibration isolator for marine diesel engines - Google Patents
A high static and low dynamic vibration isolator for marine diesel engines Download PDFInfo
- Publication number
- CN110219922B CN110219922B CN201910590741.2A CN201910590741A CN110219922B CN 110219922 B CN110219922 B CN 110219922B CN 201910590741 A CN201910590741 A CN 201910590741A CN 110219922 B CN110219922 B CN 110219922B
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- vibration isolator
- rod
- dynamic vibration
- bearing plate
- bottom shell
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- 230000003068 static effect Effects 0.000 title claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 238000002955 isolation Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- 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
- F16F7/00—Vibration-dampers; Shock-absorbers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
本发明公开了一种船舶柴油机高静低动隔振器，涉及隔振器领域，包括底壳，所述底壳安装在船舶主机底部的安装块上，所述底壳的内部顶侧滑动安装有承载板，所述承载板的顶部固定连接有对称布置的导杆，所述承载板通过导杆滑动安装在固定块，所述固定块设置为两个，所述安装块固定在两个固定块之间，所述固定块上插接有螺杆，所述底壳的底壁开设有对称布置的导槽。本发明采用多组弹簧配合，提高隔振效率，在承受较高的负载的同时可以有效的防止隔振器静变形过大，隔振效果好，使船舶柴油机隔振器的共振频率减小，同时可以保证船舶主机稳定性，有效改善低频隔振效果。
The present invention discloses a high static and low dynamic vibration isolator for a ship diesel engine, which relates to the field of vibration isolators, and comprises a bottom shell, the bottom shell is mounted on a mounting block at the bottom of a ship main engine, a bearing plate is slidably mounted on the inner top side of the bottom shell, the top of the bearing plate is fixedly connected with symmetrically arranged guide rods, the bearing plate is slidably mounted on a fixed block through the guide rods, the fixed blocks are provided with two, the mounting block is fixed between the two fixed blocks, a screw is inserted on the fixed block, and a symmetrically arranged guide groove is provided on the bottom wall of the bottom shell. The present invention adopts multiple groups of springs to improve the vibration isolation efficiency, and can effectively prevent the vibration isolator from being too statically deformed while bearing a higher load, and has a good vibration isolation effect, so that the resonance frequency of the ship diesel engine vibration isolator is reduced, and at the same time, the stability of the ship main engine can be ensured, and the low-frequency vibration isolation effect can be effectively improved.
Description
Technical Field
The invention relates to the field of vibration isolators, in particular to a high-static low-dynamic vibration isolator for a marine diesel engine.
Background
When the marine diesel engine runs under a certain working condition, the piston makes reciprocating motion, the crankshaft makes rotary motion, the small end of the connecting rod makes reciprocating motion along with the piston, the large end of the connecting rod makes rotary motion along with the crank pin, the rod body swings around the pin or the cross pin, and the complex motion of the crank-connecting rod mechanism inevitably generates unbalanced force and moment which change periodically. The unbalanced forces and moments are transmitted to the ship body to easily cause vibration of other equipment, and simultaneously act on the ship body to enable the ship body to generate vibration noise, so that the ship body is easy to fatigue and damage, further underwater noise is generated, and the sound recession of the ship is affected. Therefore, the vibration isolator is arranged at the bottom of the ship main engine to isolate the exciting force generated by the vibration of the ship main engine, and the exciting force of the ship diesel engine at the normal running rotating speed is a low-frequency disturbing force, so that the rigidity of the conventional vibration isolator is soft to isolate the low-frequency vibration, and the vibration isolator meets the vibration isolation requirement, but generates larger static deformation, so that the shaking of the diesel engine is larger and the normal running of the diesel engine is not facilitated, and the problem can be effectively solved by designing the high-static low-dynamic vibration isolator. The high-static low-dynamic vibration isolator is a nonlinear vibration isolator, and in addition, when the weight of a diesel engine exceeds the design load of the high-static low-dynamic vibration isolator, the vibration isolator deviates from the static balance position of the high-static low-dynamic vibration isolator, so that the vibration isolation effect is poor.
Disclosure of Invention
The invention aims to provide a high-static low-dynamic vibration isolator for a marine diesel engine, which aims to solve the problems in the background technology.
The high-static low-dynamic vibration isolator for the marine diesel engine comprises a bottom shell, wherein the bottom shell is arranged on a mounting block at the bottom of a marine main engine, a bearing plate is arranged on the inner top side of the bottom shell in a sliding mode, guide rods which are symmetrically arranged are fixedly connected to the top of the bearing plate, the bearing plate is slidably arranged on fixing blocks through the guide rods, the two fixing blocks are arranged, the mounting block is fixed between the two fixing blocks, a screw rod is inserted into the fixing blocks, symmetrically arranged guide grooves are formed in the bottom wall of the bottom shell, a first reinforcing rod and a limiting rod are respectively fixedly arranged on the inner top side and the bottom side of the guide groove, a sliding seat is slidably arranged in the guide groove, a first auxiliary spring is sleeved on the first reinforcing rod, a movable cavity is arranged in a bottom wall protruding portion of the bottom shell, a central shaft is fixedly connected to the middle of the bottom of the bearing plate, the bottom end of the central shaft penetrates through the top wall of the movable cavity and is fixedly connected with a baffle plate, and a main spring is sleeved on the outer surface of the central shaft;
The inside fixed mounting in activity chamber has the second stiffener, baffle and second stiffener sliding connection, the spacing groove has been seted up to one side that the fixed block is close to the guide arm terminal surface, the right-hand member fixedly connected with limiting plate of guide arm.
Optionally, the mounting block is T-shaped;
The fixed block is L-shaped.
Optionally, the screw rod runs through the inside of installation piece, the nut is all installed to the both ends screw thread of screw rod.
Optionally, the first reinforcing rod and the limiting rod both slide through the interior of the sliding seat;
the number of the second reinforcing rods is two.
Optionally, a connecting rod is hinged between the top of the sliding seat and the bottom of the bearing plate.
Optionally, a second auxiliary spring is sleeved on the outer side of the second reinforcing rod.
Optionally, the limiting plate is located the spacing inslot, the surface and the spacing groove laminating of limiting plate.
The invention has the technical effects and advantages that:
1. the invention adopts the cooperation of a plurality of groups of springs, improves the vibration isolation efficiency by utilizing the characteristics of high static and low dynamic stiffness, can effectively prevent the vibration isolator from excessively deforming while bearing higher load, and has the advantages of noise reduction and good vibration isolation effect.
2. The invention can reduce the resonance frequency of the vibration isolator of the ship main engine, reduce the static displacement of the ship main engine when the weight of the diesel engine exceeds the rated load, ensure the stability of the vibration isolator and effectively improve the low-frequency vibration isolation effect.
Drawings
Fig. 1 is a schematic view of the mounting structure of the vibration isolator of the present invention.
FIG. 2 shows the present invention the bottom shell is schematically shown in cross section.
Fig. 3 is an enlarged schematic view of the structure a in fig. 2 according to the present invention.
Fig. 4 is an enlarged schematic view of the structure at B in fig. 2 according to the present invention.
In the figure, a bottom shell 1, a ship main machine 2, an installation block 3, a bearing plate 4, a guide rod 5, a fixed block 6, a screw rod 7, a nut 8, a guide groove 9, a first reinforcing rod 10, a limiting rod 11, a sliding seat 12, a connecting rod 13, a first auxiliary spring 14, a movable cavity 15, a central shaft 16, a baffle 17, a main spring 18, a second reinforcing rod 19, a second auxiliary spring 20, a limiting groove 21 and a limiting plate 22 are shown.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured" and the like are to be construed broadly as being, for example, fixedly connected or detachably connected, mechanically connected or indirectly connected via an intermediary. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The invention provides a high-static low-dynamic vibration isolator of a marine diesel engine as shown in figures 1-4, which comprises a bottom shell 1, wherein the bottom shell 1 is arranged on a mounting block 3 at the bottom of a marine main engine 2, the top of the inside of the bottom shell 1 is laterally provided with a bearing plate 4, the top of the bearing plate 4 is fixedly connected with symmetrically arranged guide rods 5, the bearing plate 4 is slidably arranged on a fixed block 6 through the guide rods 5, the fixed block 6 is arranged into two, the mounting block 3 is fixed between the two fixed blocks 6, the mounting block 3 is T-shaped, the fixed block 6 is L-shaped, a screw 7 is inserted on the fixed block 6, the screw 7 penetrates through the inside of the mounting block 3, two ends of the screw 7 are respectively provided with nuts 8 in a threaded manner, through the arrangement, the vibration isolator can be arranged on the mounting block 3 of the marine main engine 2, the fixing effect is good, the bottom wall 9 of the symmetrically arranged guide grooves 9 is fixedly provided with a first reinforcing rod 10 and a limiting rod 11 respectively, the inside of the guide grooves 9 is slidably provided with a sliding seat 12, the first reinforcing rod 10 and the sliding seat 12 penetrates through the central shaft 12 and a second reinforcing rod 12, the central shaft 12 penetrates through the inside the sliding seat 12 and a first spring 16 and penetrates through the bottom wall 16 and is provided with an auxiliary spring 16, the bottom wall 16 is fixedly connected with the bottom wall 16, and is provided with a compression baffle 16, and the side wall 16 is fixedly connected with the bottom wall 16, and the side wall 16 is provided with a compression baffle 16, and the side wall 16 is connected with the side wall 16, and the side wall 16 is provided with the auxiliary spring 16;
As shown in fig. 3 and 4, the second reinforcing rods 19 are fixedly installed in the movable cavity 15, the two second reinforcing rods 19 are arranged, the baffle 17 is slidably connected with the second reinforcing rods 19, the second auxiliary springs 20 are sleeved on the outer sides of the second reinforcing rods 19, the baffle 17 can downwardly slide along the second reinforcing rods 19 to compress the second auxiliary springs 20, a limit groove 21 is formed in one side, close to the end face of the guide rod 5, of the fixed block 6, a limit plate 22 is fixedly connected to the right end of the guide rod 5, the limit plate 22 is located in the limit groove 21, and the surface of the limit plate 22 is attached to the limit groove 21.
Working principle:
When the marine diesel engine is used, when the bearing capacity is smaller than the rated load, the second auxiliary spring 20 does not work, the main spring 18 in the central shaft 16 deforms to bear the gravity load function of the marine diesel engine, and meanwhile, the first auxiliary spring 14 is compressed by the sliding seat 12 to form a high-static low-dynamic vibration isolator with the first auxiliary spring 14, so that the low-frequency vibration isolation function of the marine diesel engine is realized. When the load bearing exceeds the rated load, the bearing plate 4 drives the central shaft 16 to move downwards, so that the main spring 18 is further compressed, the central shaft 16 moves downwards further, the second auxiliary spring 20 is compressed by the baffle 17, the second auxiliary spring 20 starts to act, so that the main spring 18 and the second auxiliary spring 20 bear the gravity load action of the marine diesel engine together, the static stiffness is enhanced, the stiffness ratio of the high-static low-dynamic vibration isolator is reduced, the bearing capacity is improved, the static deformation is not excessive, and the static balance of the system is kept near the design position point. Meanwhile, the first auxiliary spring 14 is compressed by the sliding seat 12, and forms a high-static low-dynamic vibration isolator together with the main spring 18 and the second auxiliary spring 20, so that the bearing capacity of the vibration isolator is ensured, and meanwhile, the system has a good vibration isolation effect.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590741.2A CN110219922B (en) | 2019-07-02 | 2019-07-02 | A high static and low dynamic vibration isolator for marine diesel engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590741.2A CN110219922B (en) | 2019-07-02 | 2019-07-02 | A high static and low dynamic vibration isolator for marine diesel engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110219922A CN110219922A (en) | 2019-09-10 |
| CN110219922B true CN110219922B (en) | 2025-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910590741.2A Active CN110219922B (en) | 2019-07-02 | 2019-07-02 | A high static and low dynamic vibration isolator for marine diesel engines |
Country Status (1)
| Country | Link |
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| CN (1) | CN110219922B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678269A (en) * | 2017-01-19 | 2017-05-17 | 中国船舶重工集团公司第七研究所 | Vibration and noise reduction device of thrust power module of marine diesel engine |
| CN106801716A (en) * | 2017-04-05 | 2017-06-06 | 陈前 | A kind of Mechanical molecular spring vibration isolation buffer unit |
| CN207438043U (en) * | 2017-10-26 | 2018-06-01 | 邬林洁 | A kind of medical digital image documentation equipment |
-
2019
- 2019-07-02 CN CN201910590741.2A patent/CN110219922B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678269A (en) * | 2017-01-19 | 2017-05-17 | 中国船舶重工集团公司第七研究所 | Vibration and noise reduction device of thrust power module of marine diesel engine |
| CN106801716A (en) * | 2017-04-05 | 2017-06-06 | 陈前 | A kind of Mechanical molecular spring vibration isolation buffer unit |
| CN207438043U (en) * | 2017-10-26 | 2018-06-01 | 邬林洁 | A kind of medical digital image documentation equipment |
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| Publication number | Publication date |
|---|---|
| CN110219922A (en) | 2019-09-10 |
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