CN110985583B - Dynamic vibration absorber and processing technology thereof - Google Patents

Dynamic vibration absorber and processing technology thereof Download PDF

Info

Publication number
CN110985583B
CN110985583B CN201911336606.1A CN201911336606A CN110985583B CN 110985583 B CN110985583 B CN 110985583B CN 201911336606 A CN201911336606 A CN 201911336606A CN 110985583 B CN110985583 B CN 110985583B
Authority
CN
China
Prior art keywords
vibration absorber
dynamic vibration
holes
vulcanized rubber
bottom plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201911336606.1A
Other languages
Chinese (zh)
Other versions
CN110985583A (en
Inventor
田江
张玉辉
管超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jialang Industrial Nantong Intelligent Technology Co ltd
Shanghai Karlang Industrial Co ltd
Original Assignee
Shanghai Jialang Industrial Nantong Intelligent Technology Co ltd
Shanghai Karlang Industrial Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Jialang Industrial Nantong Intelligent Technology Co ltd, Shanghai Karlang Industrial Co ltd filed Critical Shanghai Jialang Industrial Nantong Intelligent Technology Co ltd
Priority to CN201911336606.1A priority Critical patent/CN110985583B/en
Publication of CN110985583A publication Critical patent/CN110985583A/en
Application granted granted Critical
Publication of CN110985583B publication Critical patent/CN110985583B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
    • F16F7/108—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted on plastics springs
    • 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
    • F16F2222/08—Inertia
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The invention provides a dynamic vibration absorber, which comprises a mass block, vulcanized rubber and a bottom plate, and is characterized in that: the mass block is connected with the bottom plate through vulcanized rubber, and the mass block and the vulcanized rubber and the bottom plate are vulcanized and molded through a vulcanization process. The invention solves the problem of how to effectively attenuate high-frequency squeal generated when an automobile runs at high speed in the prior art.

Description

Dynamic vibration absorber and processing technology thereof
Technical Field
The invention relates to the technical field of automobile parts, in particular to a dynamic vibration absorber and a processing technology thereof.
Background
With the energy requirement of automobile energy conservation, the automobile develops towards the direction of large torque and light weight, and the technical difficulty requirement of automobile NVH (vibration, noise and comfort) is technically increased. Meanwhile, the cognition of the consumer on the NVH performance of the automobile is continuously improved, the requirement of the consumer on the NVH characteristic of the subjective driving of the automobile is higher and higher, and therefore the NVH performance of the automobile becomes one of important characteristics of the automobile. From the condition analysis of present actual motion, novel energy automobile battery continuation of the journey technique remains to be improved, and at present the internal automobile power assembly is mainly given the internal-combustion engine, and the shock attenuation of car is fallen and is still far from wantonly. The automobile power assembly is one of main vibration excitation sources of an automobile, and has great influence on the riding comfort of the automobile.
When the existing engine NVH is adjusted, the dynamic characteristic requirement cannot meet the requirement of the working condition of an automobile, so that the root of abnormal sound cannot be found when the entire automobile NVH is adjusted, for example, when the automobile runs at 80-120 Km/h, obvious, fixed-frequency and repeated abnormal sound (high-frequency squeal) easily occurs in the traditional engine. In addition, the design and the manufacturing process of the domestic engine are different from those of the engines in developed countries, and especially the primary-order firing excitation amplitude is larger. Therefore, from the angle of adjustment and calibration of the NVH of the whole automobile, the NVH performance requirements of various working conditions of the domestic automobile (especially high-frequency squeal near the attenuation 413 hz) are improved, and the reasonable, economic, reliable and practical novel dynamic vibration absorber is designed to meet the requirements of various dynamic characteristics of the automobile.
Disclosure of Invention
The invention aims to provide a dynamic vibration absorber and a processing technology thereof, which mainly solve the problems in the prior art that: the problem of how to effectively attenuate the high-frequency squeal generated when the automobile runs at high speed.
The second problem is that: how to make the processing technology of dynamic vibration absorber, the processing degree of difficulty is low, and the precision is high, and the fault rate is low, and the problem of abnormal sound decay is avoidable on the structure.
In order to achieve the purpose, the invention adopts the technical scheme that: a dynamic vibration absorber comprises a mass block, vulcanized rubber and a bottom plate, and is characterized in that: the mass block is connected with the bottom plate through vulcanized rubber, and the mass block and the vulcanized rubber and the bottom plate are vulcanized and molded through a vulcanization process.
Furthermore, the dynamic vibration absorber is provided with at least one cylindrical first hole penetrating through the mass block and the vulcanized rubber and at least one cylindrical second hole penetrating through the bottom plate, the number of the first holes is equal to that of the second holes, the first holes and the second holes are in one-to-one correspondence, the axis of the corresponding first hole is superposed with the axis of the second hole, and the diameter of the cross section of the corresponding first hole is larger than that of the second hole.
Further, the dynamic vibration absorber is provided with at least one positioning groove.
Furthermore, the number of the first holes and the number of the second holes are two, and the number of the positioning grooves is one.
Furthermore, the positioning groove penetrates through the mass block, the vulcanized rubber and the bottom plate, and is arranged on one corner of the dynamic vibration absorber.
Furthermore, four corners of the dynamic vibration absorber are in a rounded structure.
A processing technology of a dynamic vibration absorber relates to the dynamic vibration absorber, and comprises the following specific steps:
(1) Selecting the hardness of the vulcanized rubber meeting the squealing frequency needing to be attenuated according to the squealing frequency needing to be attenuated;
(2) Determining the shape and density of the mass block and the shapes and sizes of vulcanized rubber and a bottom plate according to the size of a space for placing the dynamic vibration absorber in the engine, the quality requirement of the mass block and the hardness of the vulcanized rubber;
(3) Respectively vulcanizing and molding the selected vulcanized rubber, the mass block and the bottom plate to form a preliminary shape of the dynamic vibration absorber, namely the preliminary dynamic vibration absorber;
(4) And manufacturing two pairs of first holes and second holes on the preliminary dynamic vibration absorber, wherein the positions of each pair of first holes and second holes correspond to each other.
(5) And (3) mounting the preliminary dynamic vibration absorber on an engine support, and determining the final state of the dynamic vibration absorber after subjective evaluation and adjustment.
A processing technology of a dynamic vibration absorber relates to the dynamic vibration absorber, and comprises the following specific steps:
(1) Selecting the hardness of vulcanized rubber meeting the squeal frequency to be attenuated according to the squeal frequency to be attenuated;
(2) Determining the shape and density of the mass block and the shapes and sizes of vulcanized rubber and a bottom plate according to the size of a space for placing the dynamic vibration absorber in the engine, the quality requirement of the mass block and the hardness of the vulcanized rubber;
(3) Respectively vulcanizing and molding the selected vulcanized rubber, the mass block and the bottom plate to form a preliminary shape of the dynamic vibration absorber, namely the preliminary dynamic vibration absorber;
(4) Manufacturing two pairs of first holes and second holes on the preliminary dynamic vibration absorber, wherein the positions of each pair of first holes correspond to the positions of the second holes;
(5) And manufacturing a positioning groove on the primary dynamic vibration absorber.
(6) And (3) mounting the preliminary dynamic vibration absorber on an engine support, and determining the final state of the dynamic vibration absorber after subjective evaluation and adjustment.
A processing technology of a dynamic vibration absorber relates to the dynamic vibration absorber, and comprises the following specific steps:
(1) Selecting the hardness of vulcanized rubber meeting the squeal frequency to be attenuated according to the squeal frequency to be attenuated;
(2) Determining the shape and density of the mass block and the shapes and sizes of vulcanized rubber and a bottom plate according to the size of a space for placing the dynamic vibration absorber in the engine, the quality requirement of the mass block and the hardness of the vulcanized rubber;
(3) Respectively vulcanizing and molding the selected vulcanized rubber, the mass block and the bottom plate to form a preliminary shape of the dynamic vibration absorber, namely the preliminary dynamic vibration absorber;
(4) Manufacturing two pairs of first holes and second holes on the preliminary dynamic vibration absorber, wherein the positions of each pair of first holes correspond to the positions of the second holes;
(5) Manufacturing a positioning groove on the preliminary dynamic vibration absorber;
(6) Manufacturing rounding structures at four corners of the preliminary dynamic vibration absorber;
(7) And (3) mounting the preliminary dynamic vibration absorber on an engine support, and determining the final state of the dynamic vibration absorber after subjective evaluation and adjustment.
Further, the mass block is made of iron and is cast and formed by QT450; the bottom is made of iron and is stamped and formed by ST 12.
In view of the technical characteristics, the invention has the following beneficial effects:
1. the dynamic vibration absorber is low in cost, exquisite and simple in structure, reasonable and compact in layout, simple in production process, efficient in efficiency, easy to produce in batches, remarkable in high-frequency squeal vibration attenuation effect on the engine, capable of eliminating the defect of high-frequency abnormal sound of the traditional engine and capable of improving the durability of the engine.
2. According to the dynamic vibration absorber, the base plate and the mass block are simply and skillfully vulcanized into a whole, so that the production cost of force is controlled, and the batch flow production of the dynamic vibration absorber is realized.
3. Compared with the dynamic vibration absorber, the NVH performance of the whole automobile and the durability of the engine are improved by the automobile engine loaded with the dynamic vibration absorber, and the batch production between the dynamic vibration absorber and the engine is high in efficiency and low in risk of batch production and process control.
4. The dynamic vibration absorber has a remarkable effect of attenuating high-frequency squeal vibration of an engine. In contrast, the NVH effect of the whole vehicle is improved obviously.
5. The dynamic vibration absorber has almost zero installation clearance with the rigid bolt of the engine and strong reliability. And meanwhile, the vibration energy is absorbed to the maximum extent by the flexible deformation of the dynamic vibration absorber.
6. The dynamic vibration absorber has the advantages of stable characteristics, compact structure, exquisiteness, simple production and forming, reasonable assembly, error and neglected installation prevention function, easily controlled process control, easy batch and easy platform; the processing degree of difficulty is low, and the precision is high, and the fault rate is low, and structural rule avoids the abnormal sound decay, promotes engine life, can practice thrift production and manufacturing cost effectively, has made things convenient for later maintenance and maintenance again, and when the automobile maintenance, product interchangeability is convenient.
7. The dynamic vibration absorber and the processing technology thereof are particularly good in high-frequency squeal attenuation of an automobile engine and extend and expand the NVH adjustment and calibration technical scheme.
Drawings
Fig. 1 is a sectional view showing the structure of a dynamic vibration absorber according to embodiment 1.
Fig. 2 is a plan view of the dynamic vibration absorber of embodiment 1.
Fig. 3 is a cross-sectional view B-B of fig. 2.
Fig. 4 is a bottom view of the dynamic vibration absorber of embodiment 1.
Fig. 5 is a cross-sectional view of C-C in fig. 4.
Fig. 6 is data of a dynamic vibration absorber test (i.e., the number of actual tuning tests of the natural mode of the dynamic vibration absorber) in example 1.
FIG. 7 is a table of comparative NVH data for the test of working conditions wot of the North automotive vehicle 5363 in example 1.
Fig. 8 is a perspective view of a dynamic vibration absorber according to embodiment 1.
FIG. 9 is a cloud of design analysis of vulcanized rubber parameters in example 1.
Fig. 10 is a reference diagram corresponding to the calculation formula in the description of the dynamic vibration absorber in embodiment 1.
In the figure: 1 is a mass block; 2 is vulcanized rubber; 3 is a bottom plate; 4 is a first hole; 5 is a second hole; 6 is a positioning groove; 7 is a round structure.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Referring to fig. 1 to 8, an embodiment 1, the dynamic vibration absorber provided by the present invention includes a mass block 1, vulcanized rubber 2 and a base plate 3, and is characterized in that: the mass block 1 is connected with the bottom plate 3 through vulcanized rubber 2, and the mass block 1 and the vulcanized rubber 2, and the vulcanized rubber 2 and the bottom plate 3 are vulcanized and molded through a vulcanization process.
The bottom plate 3 and the mass block 1 are simply and ingeniously vulcanized into a whole, so that the force production cost is controlled, and the mass flow production of the dynamic vibration absorber is realized.
The mass block 1 is in flexible contact with the base plate 3 (namely, the vulcanized rubber 2 and the base plate 3 are vulcanized and formed through a vulcanization process), transient response during resonance between the mass block 1 and the base plate 3 in the working state of the dynamic vibration absorber is structurally avoided (squeal during high-speed running of an automobile is avoided), and therefore the durability of products is improved.
The dynamic vibration absorber is provided with at least one cylindrical first hole 4 penetrating through the mass block 1 and the vulcanized rubber 2 and at least one cylindrical second hole 5 penetrating through the bottom plate 3, the number of the first holes 4 is the same as that of the second holes 5, the first holes 4 correspond to the second holes 5 one by one, the axis of the corresponding first holes 4 is superposed with that of the second holes 5, and the diameter of the cross section of the corresponding first holes 4 is larger than that of the second holes 5. Each pair of first hole 4 and second hole 5 cooperate to form a bolt hole for mounting a bolt, through which a rigid bolted connection of the base plate 3 to the upper end face of the engine is achieved. The method is favorable for assembly batch production of a production line between the dynamic vibration absorber and the engine, the process production level between the dynamic vibration absorber and the engine is stable, the product performance reproducibility is good after the dynamic vibration absorber and the engine are installed, the installation process between the dynamic vibration absorber and the engine is convenient to control, and the installation production efficiency between the dynamic vibration absorber and the engine is high.
When the automobile runs at high speed, the power vibration absorber is excited by the Z direction (namely upwards) of the whole engine, the power vibration absorber moves upwards, and the engine applies load to the power vibration absorber, so that impact response under the engine is favorably attenuated to a certain degree, and the counter force of the engine is favorably attenuated, so that the subjective feeling of the whole automobile (namely effective attenuation of whistling and improvement of riding comfort of an owner) are improved.
The dynamic vibration absorber is provided with at least one positioning groove 6.
The number of the first holes 4 and the number of the second holes 5 are two, and the number of the positioning grooves 6 is one. The positioning groove 6 plays the role of preventing misloading and neglected loading, and the positioning groove 6 is matched with the positioning groove of the engine.
The positioning groove 6 penetrates through the mass block 1, the vulcanized rubber 2 and the bottom plate 3, and the positioning groove 6 is arranged on one corner of the dynamic vibration absorber.
Four corners of the dynamic vibration absorber are of a rounded structure 7 and are matched with the internal space of the engine.
A processing technology of a dynamic vibration absorber relates to the dynamic vibration absorber, and comprises the following specific steps:
(1) Selecting the hardness of the vulcanized rubber 2 meeting the squealing frequency required to be attenuated according to the squealing frequency required to be attenuated;
for example, in this embodiment 1, when it is found through customer feedback and inspection that the engine vibration frequency of a domestic automobile (bei qi shenbao 280) is around 413HZ (hertz: shown by solid line in fig. 7), the engine howling is obvious in a high-speed range, and the comfort of the owner of the automobile is low, at this time, the parameter of the vulcanized rubber 2 needs to be determined according to the internal space condition of the engine of the domestic automobile and the vibration frequency of the engine at 413HZ, at this time, the parameter of the vulcanized rubber 2 is detailed in fig. 9, that is, a design analysis cloud chart of the parameter of the vulcanized rubber.
(2) Determining the shape and density of the mass block 1, the shape and size of the vulcanized rubber 2 and the bottom plate 3 according to the size of a space for placing the dynamic vibration absorber in the engine, the quality requirement of the mass block 1 and the hardness of the vulcanized rubber 2;
in this embodiment 1, the size of the space for placing the dynamic vibration absorber assembly in the engine is as follows: 79.5x88x46mm, parameters of the mass 1: the material cast iron QT450; the size is 79.5x88x38mm, the weight is 1300 +/-20 g, and the mass of the resonance block is superior to the size. The external shapes of the mass block 1, the vulcanized rubber 2 and the bottom plate 3 are the same from top to bottom (the length is 79.5mm, the width is 88 mm), the thicknesses (namely the heights) are different, the thickness of the mass block 1 is 38 +/-0.3 mm, and the thickness of the bottom plate 3 is 4mm.
(3) Respectively vulcanizing and molding the selected vulcanized rubber 2, the mass block 1 and the bottom plate 3 to form a preliminary shape of the dynamic vibration absorber, namely the preliminary dynamic vibration absorber;
the vulcanized rubber 2 can be produced by a multi-cavity mold (more than two assemblies are vulcanized at one time), and has the advantages of high efficiency, mature process, convenient operation and less flash (the mold can be designed with a tearing groove, the subsequent rubber flash is less, and the redundant rubber flash is simply and quickly repaired).
(4) Two pairs of first holes 4 and second holes 5 are made on the preliminary dynamic vibration absorber, and each pair of first holes 4 and second holes 5 corresponds in position.
(5) Manufacturing a positioning groove 6 on the preliminary dynamic vibration absorber;
(6) And manufacturing rounding structures 7 at four corners of the primary dynamic vibration absorber.
(7) The natural frequency of the preliminary dynamic vibration absorber is verified, and the verification situation is shown in fig. 6, that is, the main natural mode =413HZ of the tested dynamic vibration absorber can be known through the feedback in fig. 6, that is, the dynamic vibrator in this embodiment 1 can meet the design purpose of effectively attenuating howling when the howling frequency is 413 HZ.
(8) And (3) mounting the preliminary dynamic vibration absorber on an engine support, and determining the final state of the dynamic vibration absorber after subjective evaluation and adjustment. Particularly, under the conditions of loading the dynamic vibration absorber and not loading the dynamic vibration absorber during high-speed operation, subjective data are quantized, and NVH data acquisition and comparison are carried out (the NVH data acquisition adopts a Siemens LMS (least mean Square) sound vibration test system).
The first hole 4 and the second hole 5 are combined to form a bolt hole for mounting the dynamic vibration absorber to an engine bracket by bolts (the design of the upper end surface of the engine is reserved with mounting threaded holes), and the bolt torque is referred to an automobile design manual.
Referring to fig. 7, namely, a comparison of front and rear NVH test data of the dynamic vibration absorber installed in the engine in this embodiment 1 shows that when the dynamic vibration absorber of this embodiment 1 is installed, under a working condition wot (i.e., a driving braking state), the right ear noise of the driver is significantly reduced or improved, that is, the dynamic vibration generator has an obvious effect on damping the howling, i.e., the vibration and noise reduction can be performed greatly. By contrast, the NVH performance of the whole automobile and the durability of the engine are improved by the automobile engine loaded with the dynamic vibration absorber, and batch production between the dynamic vibration absorber and the engine is high in efficiency and low in risk of batch production and process control. In addition, by adopting front and rear NVH data and subjective evaluation of the dynamic vibration absorber, the engine squeal is eliminated in a high-speed range after the dynamic vibration absorber is adopted. The engine squeal of the objective data at 413Hz is eliminated, and the rubber can also be used for platformization (the suspension with different rigidity can be realized only by preparing different rubber formulas). Therefore, the NVH adjusting period of the whole vehicle is shortened, and the synchronous matching research and development period of the suspension supplier is shortened. Is beneficial to improving the economic benefit of entity enterprises.
FIG. 7, the conclusion of the NVH test data graph is as follows:
1. when a dynamic vibration absorber is used, the noise curve is reduced significantly as a whole.
2. Especially at 413Hz, the noise optimization on the right ear side of the driver is obvious.
3. When the domestic automobile engine carries the dynamic vibration absorber with the design, the engine end is particularly in the Z direction in the main direction, the excitation of the engine at high rotating speed is avoided, and in principle: the dynamic vibration absorber and the high-frequency vibration energy of the engine are absorbed, and the resonance problem is structurally avoided, so that the dynamic vibration absorber and the high-frequency vibration energy absorption method are high in practicability, low in cost, easy to batch, stable in process, strong in controllability and operability and remarkable in NVH (noise vibration harshness) optimization effect. Particularly, the howling attenuation at 413Hz is obvious. Greatly improving the driving comfort performance of domestic national automobiles.
See table below for equipment used:
Figure GDA0003831611950000111
the dynamic vibration absorber in the embodiment 1 adopts the following principle: when the frequency of the simple resonance excitation force applied to the single-free system is the same as the natural frequency of the system, the system will resonate, and the natural frequency of the system can be changed by changing the mass or the spring stiffness of the system. In order to reduce vibration, a second mass and spring may be attached to change the system into a two degree of freedom system when the mass and stiffness of the system cannot be changed in some cases.
The formula is shown in the following chart:
introduction of dynamic vibration absorber (see the attached figure 10 for details)
Figure GDA0003831611950000112
Figure GDA0003831611950000113
The solution can be found as:
Figure GDA0003831611950000114
Figure GDA0003831611950000115
as can be seen from the above formula, when the excitation force frequency ω = ω a, the amplitude X1 of the primary system is zero, and the vibration absorber is capable of absorbing vibration.
The absorber spring has a force of k 1 x 1 (t)＝-F 1 sinωt
Figure GDA0003831611950000116
x 1 (t)＝X 1 sinωt，x 1 (t)＝X 1 sinωt
The mass 1 is vulcanized integrally with the sole plate 3 and the rubber. As long as the natural frequency of dynamic vibration absorption is the same as the vibration excitation frequency of the engine, any vibration absorber can play a vibration absorption role, when the high-frequency load of the engine is applied to the dynamic vibration absorber, the dynamic vibration absorber can generate vibration in the vertical direction, so that vibration energy of certain frequency is absorbed, the vibration energy of the engine is attenuated to the auxiliary frame, and the vibration transmission of the engine is attenuated to the maximum extent: (1) the damping effect on the high-frequency squeal vibration of the engine is particularly obvious. (2) In contrast, the entire vehicle NVH effect is improved remarkably. (3) The mounting clearance between the dynamic vibration absorber and the rigid bolt of the engine is almost zero, and the reliability is strong. And meanwhile, the vibration energy is absorbed to the maximum extent by the flexible deformation of the dynamic vibration absorber.
The mass block 1 is made of iron and is formed by casting QT450 (nodular cast iron with tensile strength of 450 MPa), and has the advantages that: the molding process is mature, the price is low, and the quality is reliable; the bottom is made of iron and is formed by punch forming by ST12 (Germany cold rolling carbon thin steel plate ST 12), and the bottom has the advantages that: the stamping process is mature, easy to process, high in efficiency, easy to control the size, economical and applicable.
In addition, before designing a specific dynamic vibration absorber, different rubber compound formulas (different hardness of rubber) can be firstly adjusted by a vulcanization process engineer. Then, trial-producing vulcanized parts of different rubber materials, mainly adopting a vulcanization process, debugging by a vulcanization process engineer, and recording process parameters of the vulcanized parts. Finally, the parameters of the vulcanized rubber 2, the press-fitting process parameters of the mass block 1 and the bottom plate 3 can be theoretically verified, namely different rubber material dynamic vibration absorbers are respectively assembled in a sedan NVH test of a country for comparison to obtain a comparison curve, so that the NVH performance of the automobile is further optimized, and reasonable press-fitting process parameters are set to complete data analysis, locking, storage, traceability and the like.
The vulcanized rubber 2 is selected because the formula adjustability of the vulcanized rubber 2 is good, different rubber formulas can be tempered by rubber material polymer engineers, the dynamic vibration absorbers with different natural frequencies can be adjusted, the subsequent adjustability is superior, the platform is wide, the operability is strong, and the vibration absorber is used as a novel damping piece to furthest attenuate the vibration excitation energy of an automobile power assembly, so that the NVH (noise, vibration and harshness) characteristic of the automobile is further improved, the service life of the automobile is prolonged, and the configuration gap between the automobile and a qualified automobile is greatly needed.
A dynamic vibration absorber suspension is characterized in that high-frequency vibration energy is absorbed. The subjective driving performance of the domestic national sedan is optimized, and the NVH performance of the domestic national sedan is improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (4)

1. The utility model provides a processing technology of dynamic vibration absorber, wherein dynamic vibration absorber includes quality piece, vulcanite and bottom plate, its characterized in that: the mass block is connected with the bottom plate through vulcanized rubber, and the mass block and the vulcanized rubber as well as the vulcanized rubber and the bottom plate are vulcanized and molded through a vulcanization process;
the dynamic vibration absorber is provided with at least one cylindrical first hole penetrating through the mass block and the vulcanized rubber and at least one cylindrical second hole penetrating through the bottom plate, the number of the first holes is the same as that of the second holes, the first holes correspond to the second holes one by one, the axis of the corresponding first hole is superposed with that of the second hole, and the diameter of the cross section of the corresponding first hole is larger than that of the second hole;
the dynamic vibration absorber is provided with at least one positioning groove;
the number of the first holes and the number of the second holes are two, and the number of the positioning grooves is one;
the processing technology comprises the following specific steps:
(1) Selecting the hardness of vulcanized rubber meeting the squeal frequency to be attenuated according to the squeal frequency to be attenuated;
(2) Determining the shape and density of the mass block and the shapes and sizes of vulcanized rubber and a bottom plate according to the size of a space for placing the dynamic vibration absorber in the engine, the quality requirement of the mass block and the hardness of the vulcanized rubber;
(3) Respectively vulcanizing and molding the selected vulcanized rubber, the mass block and the bottom plate to form a preliminary shape of the dynamic vibration absorber, namely the preliminary dynamic vibration absorber;
(4) Manufacturing two pairs of first holes and second holes on the preliminary dynamic vibration absorber, wherein the positions of each pair of first holes correspond to the positions of the second holes;
(5) And (3) mounting the preliminary dynamic vibration absorber on an engine support, and determining the final state of the dynamic vibration absorber after subjective evaluation and adjustment.
2. The utility model provides a processing technology of dynamic vibration absorber, wherein dynamic vibration absorber includes quality piece, vulcanite and bottom plate, its characterized in that: the mass block is connected with the bottom plate through vulcanized rubber, and the mass block and the vulcanized rubber as well as the vulcanized rubber and the bottom plate are vulcanized and molded through a vulcanization process;
the dynamic vibration absorber is provided with at least one cylindrical first hole penetrating through the mass block and the vulcanized rubber and at least one cylindrical second hole penetrating through the bottom plate, the number of the first holes is the same as that of the second holes, the first holes correspond to the second holes one by one, the axis of the corresponding first hole is superposed with that of the second hole, and the diameter of the cross section of the corresponding first hole is larger than that of the second hole;
the dynamic vibration absorber is provided with at least one positioning groove;
the number of the first holes and the number of the second holes are two, and the number of the positioning grooves is one;
the positioning groove penetrates through the mass block, the vulcanized rubber and the bottom plate, and is arranged on one corner of the dynamic vibration absorber;
the processing technology comprises the following specific steps:
(1) Selecting the hardness of vulcanized rubber meeting the squeal frequency to be attenuated according to the squeal frequency to be attenuated;
(2) Determining the shape and density of the mass block and the shapes and sizes of vulcanized rubber and a bottom plate according to the size of a space for placing the dynamic vibration absorber in the engine, the quality requirement of the mass block and the hardness of the vulcanized rubber;
(3) Respectively vulcanizing and molding the selected vulcanized rubber, the mass block and the bottom plate to form a preliminary shape of the dynamic vibration absorber, namely the preliminary dynamic vibration absorber;
(4) Manufacturing two pairs of first holes and second holes on the preliminary dynamic vibration absorber, wherein the positions of each pair of first holes correspond to the positions of the second holes;
(5) Manufacturing a positioning groove on the preliminary dynamic vibration absorber;
(6) And (3) mounting the preliminary dynamic vibration absorber on an engine support, and determining the final state of the dynamic vibration absorber after subjective evaluation and adjustment.
3. The utility model provides a processing technology of dynamic vibration absorber, wherein dynamic vibration absorber includes quality piece, vulcanite and bottom plate, its characterized in that: the mass block is connected with the bottom plate through vulcanized rubber, and the mass block and the vulcanized rubber as well as the vulcanized rubber and the bottom plate are vulcanized and molded through a vulcanization process;
the dynamic vibration absorber is provided with at least one cylindrical first hole penetrating through the mass block and the vulcanized rubber and at least one cylindrical second hole penetrating through the bottom plate, the number of the first holes is the same as that of the second holes, the first holes correspond to the second holes one by one, the axis of the corresponding first hole is superposed with that of the second hole, and the diameter of the cross section of the corresponding first hole is larger than that of the second hole;
the dynamic vibration absorber is provided with at least one positioning groove;
the number of the first holes and the number of the second holes are two, and the number of the positioning grooves is one;
the positioning groove penetrates through the mass block, the vulcanized rubber and the bottom plate, and is arranged on one corner of the dynamic vibration absorber;
four corners of the dynamic vibration absorber are in a rounded structure;
the processing technology comprises the following specific steps:
(1) Selecting the hardness of vulcanized rubber meeting the squeal frequency to be attenuated according to the squeal frequency to be attenuated;
(2) Determining the shape and density of the mass block and the shapes and sizes of vulcanized rubber and a bottom plate according to the size of a space for placing the dynamic vibration absorber in the engine, the quality requirement of the mass block and the hardness of the vulcanized rubber;
(3) Respectively vulcanizing and molding the selected vulcanized rubber, the mass block and the bottom plate to form a primary shape of the dynamic vibration absorber, namely a primary dynamic vibration absorber;
(4) Manufacturing two pairs of first holes and second holes on the preliminary dynamic vibration absorber, wherein the positions of each pair of first holes correspond to the positions of the second holes;
(5) Manufacturing a positioning groove on the preliminary dynamic vibration absorber;
(6) Manufacturing rounding structures at four corners of the preliminary dynamic vibration absorber;
(7) And (3) mounting the preliminary dynamic vibration absorber on an engine support, and determining the final state of the dynamic vibration absorber after subjective evaluation and adjustment.
4. The process for manufacturing a dynamic vibration absorber according to any one of claims 1 to 3, wherein: the mass block is made of iron and is cast and molded by QT450; the bottom plate is made of iron and is formed by ST12 punch forming.
CN201911336606.1A 2019-12-23 2019-12-23 Dynamic vibration absorber and processing technology thereof Active CN110985583B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911336606.1A CN110985583B (en) 2019-12-23 2019-12-23 Dynamic vibration absorber and processing technology thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911336606.1A CN110985583B (en) 2019-12-23 2019-12-23 Dynamic vibration absorber and processing technology thereof

Publications (2)

Publication Number Publication Date
CN110985583A CN110985583A (en) 2020-04-10
CN110985583B true CN110985583B (en) 2023-03-14

Family

ID=70074197

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911336606.1A Active CN110985583B (en) 2019-12-23 2019-12-23 Dynamic vibration absorber and processing technology thereof

Country Status (1)

Country Link
CN (1) CN110985583B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08193641A (en) * 1994-11-18 1996-07-30 Bridgestone Corp Dynamic damper
JP2009204123A (en) * 2008-02-28 2009-09-10 Tokai Rubber Ind Ltd Dynamic damper
CN101699098A (en) * 2009-10-30 2010-04-28 奇瑞汽车股份有限公司 Steering system dynamic vibration absorber and design method thereof
CN201757151U (en) * 2010-08-18 2011-03-09 亚新科噪声与振动技术（安徽）有限公司 Vehicle door power vibration absorber
CN102121506A (en) * 2011-03-28 2011-07-13 重庆长安汽车股份有限公司 Vibration absorber with adjustable frequency installed on suspended support of automobile
KR20130059645A (en) * 2011-11-29 2013-06-07 현대자동차주식회사 Hydro bushing
CN203161948U (en) * 2013-03-21 2013-08-28 洛阳双瑞橡塑科技有限公司 Multi-degree of freedom dynamic vibration absorber
CN205064666U (en) * 2015-09-29 2016-03-02 上海汽车集团股份有限公司 Tunable frequency's rubber bump leveller
CN206972812U (en) * 2017-07-12 2018-02-06 北京汽车研究总院有限公司 A kind of dynamic vibration absorber and automobile

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08193641A (en) * 1994-11-18 1996-07-30 Bridgestone Corp Dynamic damper
JP2009204123A (en) * 2008-02-28 2009-09-10 Tokai Rubber Ind Ltd Dynamic damper
CN101699098A (en) * 2009-10-30 2010-04-28 奇瑞汽车股份有限公司 Steering system dynamic vibration absorber and design method thereof
CN201757151U (en) * 2010-08-18 2011-03-09 亚新科噪声与振动技术（安徽）有限公司 Vehicle door power vibration absorber
CN102121506A (en) * 2011-03-28 2011-07-13 重庆长安汽车股份有限公司 Vibration absorber with adjustable frequency installed on suspended support of automobile
KR20130059645A (en) * 2011-11-29 2013-06-07 현대자동차주식회사 Hydro bushing
CN203161948U (en) * 2013-03-21 2013-08-28 洛阳双瑞橡塑科技有限公司 Multi-degree of freedom dynamic vibration absorber
CN205064666U (en) * 2015-09-29 2016-03-02 上海汽车集团股份有限公司 Tunable frequency's rubber bump leveller
CN206972812U (en) * 2017-07-12 2018-02-06 北京汽车研究总院有限公司 A kind of dynamic vibration absorber and automobile

Also Published As

Publication number Publication date
CN110985583A (en) 2020-04-10

Similar Documents

Publication Publication Date Title
CN201090655Y (en) Movable decoupling diaphragm type crash-proof hydraulic pressure damp mounts
CN101699098B (en) Steering system dynamic vibration absorber and design method thereof
CN112115619B (en) Method for calculating jolting characteristic of power assembly
CN212226389U (en) Novel three-way pipeline vibration absorber
CN101900179B (en) Automobile shock absorber
CN110985583B (en) Dynamic vibration absorber and processing technology thereof
CN107891737B (en) Suspension system and car
CN214578586U (en) Adjustable driving shaft vibration absorber structure
CN217683016U (en) Support integral type hydraulic pressure bush structure
CN105667290A (en) Front suspension assembly for power assembly
CN214138168U (en) Two-stage vibration damping system for use in a motor vehicle
CN207291647U (en) A kind of novel damping suspension
CN204692449U (en) Rear axle power bump leveller
CN210050252U (en) Vibration absorber for solving modal problem of acoustic cavity of automobile tire
CN203793107U (en) Suspension cushion assembly of longitudinal engine
CN217532530U (en) Novel two-dimensional adjustable suspension system for secondary vibration isolation of electric automobile
CN221137602U (en) Pull rod suspension structure and vehicle
CN217553629U (en) Automobile balance arm assembly and automobile
CN205736902U (en) The suspending apparatus of high-frequency vibration isolation and motor vehicles for motor vehicles
CN221054192U (en) Vibration absorber and air compressor comprising same
CN107618351A (en) A kind of novel damping suspension
CN216008815U (en) Vacuum pump for new energy electric automobile
CN219755223U (en) High-frequency vibration absorption module for automobile engine
CN212313668U (en) Steering wheel resonator for optimizing NVH performance
CN221113407U (en) Torsion beam suspension and automobile

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant