CN110185870B - Vibration damper and vehicle pipeline vibration damping system - Google Patents
Vibration damper and vehicle pipeline vibration damping system Download PDFInfo
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- CN110185870B CN110185870B CN201910437546.6A CN201910437546A CN110185870B CN 110185870 B CN110185870 B CN 110185870B CN 201910437546 A CN201910437546 A CN 201910437546A CN 110185870 B CN110185870 B CN 110185870B
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- piston
- vibration
- connecting rod
- vibration damping
- vibrating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
Abstract
The invention discloses a vibration damping device and a vehicle pipeline vibration damping system, wherein the vibration damping device is used for connecting a fixing part and a vibrating part and comprises a main body and a connecting rod, the main body comprises a fixing part connected with the fixing part and a connecting part connected with the vibrating part, the connecting part is provided with a plurality of positions for connecting the vibrating part, at least one of the connecting parts is connected with the connecting rod for connecting the vibrating part through the connecting rod, a damping mechanism is arranged between the connecting part and the connecting rod and used for providing damping force for the connecting rod, and the vibration of the vibrating part can be transmitted to the damping mechanism along the axial direction of the connecting rod, so that the vibration energy of the vibrating part can be gradually absorbed by the damping mechanism through the matching of the connecting rod and the damping mechanism, and the vibration damping effect. The vehicle pipeline vibration damping system comprises the vibration damping device, the vibration damping device is arranged on a vehicle pipeline, and the vehicle pipeline forms a vibration piece, so that the NVH performance of a vehicle can be improved.
Description
Technical Field
The invention belongs to the technical field of vibration reduction, and particularly relates to a vibration reduction device and a vehicle pipeline vibration reduction system.
Background
The vibration reduction device is a common means for reducing vibration and noise, and in the existing vibration reduction device, only one fixed point is usually arranged on the vibration piece, and when the vibration piece is longer, the vibration piece still easily generates larger vibration, so that the vibration reduction device cannot achieve the expected effect.
For an engine, a pipeline part of the engine has a large thin-wall cavity part, the modal frequency is generally low, the pipeline part is easy to excite to generate noise, and the NVH performance of the engine and the whole vehicle is directly influenced, so that the vibration of the pipeline part of the engine is extremely necessary to be reduced through a vibration damping device.
Disclosure of Invention
The invention mainly aims to provide a vibration damping device and a vehicle pipeline vibration damping system, which optimize the vibration energy absorption process of a vibrating piece and improve the NVH (noise vibration and harshness) performance of an engine.
The invention provides a vibration damping device for connecting a fixed part and a vibrating part, comprising:
the main body comprises a fixing part connected with the fixing part and a connecting part connected with the vibrating part, and the connecting parts are provided with a plurality of positions for connecting the vibrating part; and the number of the first and second groups,
a connecting rod connected to at least one of the plurality of connecting parts to connect the vibrating member through the connecting rod;
and a damping mechanism is arranged between the connecting part and the connecting rod and used for providing damping force for the connecting rod.
Optionally, the damping mechanism comprises:
the piston cylinder is internally provided with a piston cavity, and a pressure transmission medium is filled in the piston cavity and has compressibility and fluidity; and the number of the first and second groups,
the piston is movably arranged in the piston cavity;
the piston cylinder is provided with a mounting hole communicated with the piston cavity, one end of the connecting rod is hermetically and movably mounted at the mounting hole, and the connecting rod extends into the piston cavity from the mounting hole and is connected with the piston so as to drive the piston to move in the piston cavity.
Optionally, the piston divides the piston chamber into a rod chamber and a rodless chamber containing the connecting rod;
and a gap is formed between the peripheral side surface of the piston and the inner side wall of the piston cavity and used for communicating the rod cavity with the rodless cavity, and the piston cylinder is provided with an oil outlet communicated with the rodless cavity.
Optionally, the damping mechanism further comprises a regulation unit, the regulation unit comprising:
the conveying pipe is connected with the oil outlet;
the pressure pump is connected with the conveying pipe and used for conveying the pressure transmission medium to the rod cavity through the conveying pipe;
the control valve is arranged at the oil outlet and used for controlling the opening and closing of the oil outlet; and the number of the first and second groups,
the controller is electrically connected with the vibration detector, the control valve and the pressure pump, and the controller acquires the vibration characteristic of the vibrating piece through the vibration detector and is used for correspondingly controlling the control valve and the pressure pump according to the vibration characteristic.
Optionally, the pressure transmission medium is oil.
Optionally, the circumferential side surface of the piston is sleeved with a plurality of piston rings.
Optionally, the link has a rotating end for rotatably mounting to the vibrating member.
Optionally, the rotating end of the connecting rod is provided with a mounting member for mounting to the vibrating member, and the rotating end of the connecting rod is rotatably mounted to the mounting member.
The invention further provides a vehicle pipeline vibration damping system which comprises a vehicle pipeline and the vibration damping device, wherein the vibration damping device is arranged on the vehicle pipeline, and the vehicle pipeline forms the vibrating piece.
Optionally, the vibration damping device includes the regulation and control unit, and the controller of the regulation and control unit is electrically connected to an electronic control unit of the vehicle, and is configured to obtain an engine speed of the vehicle through the electronic control unit, and correspondingly control the control valve and the pressure pump according to the engine speed.
In the technical scheme provided by the invention, the vibrating piece is connected with the fixed piece through the fixed part of the main body, the rigidity of the vibrating piece is improved, the vibrating piece is prevented from vibrating under smaller excitation, the main body also comprises a plurality of connecting parts connected with the vibrating piece, the vibrating piece is enabled to conduct the vibration of the vibrating piece in a larger range, in other embodiments, the fixed part can be connected with a plurality of or one of the connecting parts to form a whole, the rigidity of the vibrating piece is further improved, the connecting parts are connected with the vibrating piece through the damping mechanism and the connecting rod, therefore, the vibrating piece is flexibly connected with the main body, the vibration of the vibrating piece can be transmitted to the damping mechanism through the connecting rod along the axial direction of the vibrating piece, specifically, the damping mechanism is provided with a damping vibration system, the damping vibration system belongs to a dissipation system, is a vibration process with continuously reduced energy, the amplitude of the vibration process is reduced along, the vibration energy of vibrating piece can be absorbed by damping mechanism gradually to reach the effect of damping, in this embodiment, vibration damper has promoted the bulk rigidity of vibrating piece, and damping mechanism has promoted the bulk compliance of vibrating piece, has optimized the damping process of vibrating piece.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic perspective view of a vibration damping device according to an embodiment of the present invention;
fig. 2 is a partial structural schematic diagram of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Vibrating |
320 | Connecting |
| 110 | |
321 | Ball head |
| 111 | |
330 | |
| 120 | |
340 | |
| 121 | Ball head seat | 341 | |
| 210 | Connecting |
350 | Cavity with |
| 220 | |
360 | Piston |
| 300 | |
361 | Piston |
| 310 | Piston |
370 | |
| 311 | |
380 | |
| 312 | Back cover |
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1-2, an embodiment of a vibration damping device according to the present invention is used for connecting a fixed member and a vibrating member 100, and includes a main body and a connecting rod 320, wherein the main body includes a fixed portion 220 connected to the fixed member and a connecting portion 210 connected to the vibrating member 100, the connecting portion 210 is provided with a plurality of connecting portions for connecting a plurality of positions of the vibrating member 100, at least one of the connecting portions 210 is connected to the connecting rod 320 for connecting the vibrating member 100 through the connecting rod 320, a damping mechanism 300 is disposed between the connecting portion 210 and the connecting rod 320, and the damping mechanism 300 is configured to provide a damping force to the connecting rod 320. In this embodiment, the vibrating member 100 is connected to the fixing member through the fixing portion 220 of the main body, so that the rigidity of the vibrating member 100 is improved, and the vibrating member 100 is prevented from vibrating under a small excitation, the main body further includes a plurality of connecting portions 210 connected to the vibrating member 100, so that the vibrating member 100 conducts the vibration of the vibrating member 100 in a larger range, in other embodiments, the fixing portion 220 may be connected to a plurality of or one of the connecting portions 210 to form a whole, so as to further improve the rigidity of the vibrating member 100, and the connecting portions 210 are connected to the vibrating member 100 through the damping mechanism 300 and the connecting rod 320, so that the vibrating member 100 and the main body form a flexible connection, so that the vibration of the vibrating member 100 can be transmitted to the damping mechanism 300 through the connecting rod 320 along the axial direction thereof, specifically, the damping mechanism 300 is formed with a damping vibration system, which belongs to a dissipation system, and is a, therefore, through the cooperation of the connecting rod 320 and the damping mechanism 300, the vibration energy of the vibrating element 100 can be gradually absorbed by the damping mechanism 300, so as to achieve the vibration damping effect.
Further, damping mechanism 300 includes piston cylinder 310 and piston 360, piston cylinder 310 is fixed to be located connecting portion 210, the inside piston chamber that is equipped with of piston cylinder 310, the piston intracavity is filled with pressure medium, pressure medium has compressibility and mobility, piston 360 movably installs in the piston chamber, piston cylinder 310 sets up the mounting hole with piston chamber intercommunication, the one end of connecting rod 320 is sealed and movably installs in mounting hole department, connecting rod 320 stretches into the piston chamber from mounting hole department and is connected with piston 360, in order to drive piston 360 the activity in the piston chamber, and convert the vibration of vibrating part 100 into the slip of piston 360, make the vibration energy of vibrating part 100 change into thermal motion energy gradually.
The piston 360 divides the piston cavity into a rod cavity 350 and a rodless cavity 340 which contain the connecting rod 320, a gap is arranged between the peripheral side surface of the piston 360 and the inner side wall of the piston cavity and is used for communicating the rod cavity 350 and the rodless cavity 340, the piston cylinder 310 is provided with an oil outlet 341 communicated with the rodless cavity 340, and a pressure transfer medium can flow back and forth between the rodless cavity 340 and the rod cavity 350 through the sliding of the piston 360, wherein the extending direction of the piston cavity and the sliding direction of the piston 360 are arranged along the axial direction of the connecting rod 320, so that the vibration of the vibrating piece 100 is transmitted to the piston 360 along the axial direction of the connecting rod 320 as much as possible.
The rodless cavity 340 and the rod cavity 350 are filled with pressure transmission medium, when the connecting rod 320 transmits the vibration of the vibrating element 100 to the piston 360, the piston 360 slides back and forth in the piston cavity, and meanwhile, the pressure transmission medium in the rodless cavity 340 and the rod cavity 350 is repeatedly extruded, because the pressure transmission medium has compressibility and fluidity, the connecting rod 320, the piston 360 and the pressure transmission medium form a damping vibration system, the vibration energy of the vibrating element 100 is gradually converted into thermal motion energy through friction between the piston 360 and the inner wall of the piston cylinder 310 and viscous resistance between the piston 360 and the pressure transmission medium, in addition, when the piston 360 slides, the pressure transmission medium in the rodless cavity 340 and the rod cavity 350 flows back and forth through a gap between the piston 360 and the inner wall of the piston cylinder 310, and the damping effect is enhanced.
Further, in this embodiment, the pressure medium is oil, which has a lubricating effect, the piston 360 is sleeved with a plurality of piston rings 361 on its sliding surface, and since the clearance between the piston 360 and the inner wall of the piston cylinder 310 is very small, the piston rings 361 can enhance the fluidity of the oil in the rod-less chamber 340 and the rod-containing chamber 350 when the piston 360 slides back and forth.
In this embodiment, the piston cylinder 310 is sleeved with a sealing ring 311 at the mounting hole, so that the sealing performance of the piston cylinder 310 is enhanced, and the piston cylinder 310 is further provided with a detachable rear cover 312, so that the installation and the maintenance are convenient.
Further, the damping mechanism 300 further includes a regulation unit including a delivery pipe 370, a pressure pump 380, a control valve 330, and a controller (not shown in the drawings), the delivery pipe 370 being connected to the oil outlet 341, the pressure pump 380 being connected to the delivery pipe 370, for delivering a pressure medium to the rodless chamber 340 through the delivery pipe 370, a control valve 330 is provided at the oil outlet 341 for controlling the opening and closing of the oil outlet 341, or the opening and closing of the delivery pipe 370 may be controlled, the controller is electrically connected to the vibration detector (not shown in the figure), the control valve 330 and the pressure pump 380, the controller obtains the vibration characteristics of the vibrating member 100 through the vibration detector, for controlling the control valve 330 and the pressure pump 380 according to the vibration characteristics, the vibration detector can obtain the vibration characteristics of the vibrating member 100, such as amplitude, frequency, etc., for controlling the control valve 330 and the pressure pump 380 according to the vibration characteristics.
Specifically, when the vibration energy of the vibrating element 100 changes, the damping effect of the damping mechanism 300 may be correspondingly changed by the adjusting and controlling unit, for example, the damping coefficient is adjusted, the adjusting process may be that when the vibration energy becomes larger, the pressure pump 380 pumps a pressure medium into the rodless cavity 340, so as to increase the pressure in the piston cavity, the control valve 330 may keep the interior of the rodless cavity 340 closed, so as to keep the pressure medium at the pressure, thereby achieving the effect of absorbing the vibration more effectively, when the vibration energy becomes smaller, the control valve 330 may make the pressure medium in the rodless cavity 340 flow back a small amount, so as to balance the pressures in the rodless cavity 340 and the rod cavity 350, in this embodiment, the control valve 330 may be a one-way valve having a reverse flow function.
In other embodiments, the pressure pump 380 can be used to input or suck the pressure medium into or out of the rod cavity 350 through the delivery pipe 370 by matching the pressure pump 380 with the control valve 330.
Referring to fig. 1, the connecting rod 320 has a rotating end for rotatably mounting to the vibrating element 100, so as to realize flexible connection between the vibrating element 100 and the connecting rod 320.
Accordingly, the rotating end of the connecting rod 320 is provided with the mounting member 120 for mounting to the vibrating member 100, the rotating end of the connecting rod 320 is rotatably mounted to the mounting member 120, so as to avoid damaging or changing the surface structure of the vibrating member 100, and the mounting member 120 may be a thin plate fixed to the surface of the vibrating member 100 by welding.
More specifically, in the present embodiment, the rotation end of the link 320 is provided with a ball 321, the mounting member 120 is provided with a ball 321 seat 121 corresponding to the ball 321, and the ball 321 is rotatably mounted on the ball 321 seat 121.
In this embodiment, the surface of the vibrating element 100 is fixedly provided with the bracket 110, the bracket 110 is detachably mounted on the bracket 110 through the bolt 111, and the bracket 110 is fixed on the surface of the vibrating element 100 by welding, so as to avoid damaging or changing the surface structure of the vibrating element 100.
The invention also provides a vehicle pipeline vibration damping system which comprises a vehicle pipeline and the vibration damping device, wherein the vibration damping device is arranged on the vehicle pipeline, and the vehicle pipeline forms a vibrating piece.
Further, the vibration damping device further includes the regulation and control unit, a controller in the regulation and control unit is electrically connected to an electronic control unit of the vehicle, and is configured to obtain a vibration characteristic of the vehicle pipeline through the electronic control unit, and correspondingly control the control valve 330 and the pressure pump 380 according to the vibration characteristic.
Further, in this embodiment, when the vibration damping device is installed in an engine pipeline, the controller obtains the engine speed, and since the engine speed is different, vibration energy excited in the engine pipeline by the crankshaft rotation of the engine, the reciprocating motion of the piston 360, combustion noise of the combustion chamber, and the like is also different, so that the vibration damping device is controlled correspondingly according to the engine speed in a manner of effectively improving the NVH performance of the vehicle, specifically, the control process may be controlling the valve 330 and the pressure pump 380 according to the engine speed, when the engine speed does not exceed 3000rpm, the controller adjusts the pressure of the pressure medium in the damping mechanism 300 to 0.5-0.8Mpa, and when the engine speed exceeds 3000rpm, the controller adjusts the pressure of the pressure medium in the damping mechanism 300 to 1.0-1.5 Mpa.
The manner of acquiring the rotation speed by the controller is not limited, and in other embodiments, the controller may be directly electrically connected to the rotation speed sensor to acquire the rotation speed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A vibration damping device for connecting a fixed member and a vibrating member, comprising:
the main body comprises a fixing part connected with the fixing part and a connecting part connected with the vibrating part, and the connecting parts are provided with a plurality of positions for connecting the vibrating part; and the number of the first and second groups,
a connecting rod connected to at least one of the plurality of connecting parts to connect the vibrating member through the connecting rod; the connecting rod is provided with a ball head and is rotatably arranged on the vibrating piece through the ball head;
wherein, connecting portion with be equipped with damping mechanism between the connecting rod, damping mechanism is used for providing right the damping force of connecting rod, damping mechanism includes:
the piston cylinder is internally provided with a piston cavity, and a pressure transmission medium is filled in the piston cavity and has compressibility and fluidity; and the number of the first and second groups,
the piston is movably arranged in the piston cavity;
the piston cylinder is provided with a mounting hole communicated with the piston cavity, one end of the connecting rod is hermetically and movably mounted at the mounting hole, and the connecting rod extends into the piston cavity from the mounting hole and is connected with the piston so as to drive the piston to move in the piston cavity.
2. The vibration damping device according to claim 1 wherein said piston divides said piston chamber into a rod chamber and a rodless chamber containing said connecting rod;
and a gap is formed between the peripheral side surface of the piston and the inner side wall of the piston cavity and used for communicating the rod cavity with the rodless cavity, and the piston cylinder is provided with an oil outlet communicated with the rodless cavity.
3. The vibration damping device according to claim 2, wherein the damping mechanism further comprises a regulation unit that includes:
the conveying pipe is connected with the oil outlet;
the pressure pump is connected with the conveying pipe and used for conveying the pressure transmission medium to the rod cavity through the conveying pipe;
the control valve is arranged at the oil outlet and used for controlling the opening and closing of the oil outlet; and the number of the first and second groups,
the controller is electrically connected with the vibration detector, the control valve and the pressure pump, and the controller acquires the vibration characteristic of the vibrating piece through the vibration detector and is used for correspondingly controlling the control valve and the pressure pump according to the vibration characteristic.
4. Damping device according to claim 1, characterized in that the pressure medium is oil.
5. The vibration damping device as set forth in claim 1, wherein the circumferential side surface of the piston is provided with a plurality of piston rings.
6. The vibration damping device according to claim 1, wherein the rotating end of the link is provided with a mounting member for mounting to the vibrating member, and the rotating end of the link is rotatably mounted to the mounting member.
7. A vehicle pipe vibration damping system comprising a vehicle pipe and a vibration damping device according to any one of claims 1 to 6 provided in the vehicle pipe, the vehicle pipe constituting the vibrating member.
8. The vehicle pipe vibration damping system according to claim 7, comprising the vibration damping device according to claim 3, wherein the vibration damping device comprises the control unit, and the controller of the control unit is electrically connected with an electronic control unit of a vehicle, and is used for acquiring the engine speed of the vehicle through the electronic control unit and correspondingly controlling the control valve and the pressure pump according to the engine speed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910437546.6A CN110185870B (en) | 2019-05-23 | 2019-05-23 | Vibration damper and vehicle pipeline vibration damping system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910437546.6A CN110185870B (en) | 2019-05-23 | 2019-05-23 | Vibration damper and vehicle pipeline vibration damping system |
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| CN110185870A CN110185870A (en) | 2019-08-30 |
| CN110185870B true CN110185870B (en) | 2020-11-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461359B (en) * | 2020-12-17 | 2022-02-01 | 安徽江淮汽车集团股份有限公司 | Mounting structure and noise testing device |
| CN113864564A (en) * | 2021-09-22 | 2021-12-31 | 浙江零跑科技股份有限公司 | Multiple damping intercooling pipeline |
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| CN102320337A (en) * | 2011-06-30 | 2012-01-18 | 三一重工股份有限公司 | A kind of automobile cab front hung holder and heavy motor vehicle |
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| CN110185870A (en) | 2019-08-30 |
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