CN107781024A - Vibration damping cooling fan system and apply its automobile - Google Patents
Vibration damping cooling fan system and apply its automobile Download PDFInfo
- Publication number
- CN107781024A CN107781024A CN201711160883.2A CN201711160883A CN107781024A CN 107781024 A CN107781024 A CN 107781024A CN 201711160883 A CN201711160883 A CN 201711160883A CN 107781024 A CN107781024 A CN 107781024A
- Authority
- CN
- China
- Prior art keywords
- cooling fan
- locating part
- blower tray
- vibration damping
- fan system
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2050/00—Applications
- F01P2050/22—Motor-cars
Abstract
The invention provides a kind of vibration damping cooling fan system and its automobile is applied, the vibration damping cooling fan system includes blower tray, cooling fan and multiple installation mounting assemblies, and installation mounting assembly includes locating part, and locating part is circumferentially arranged with stopper slot；Cooling fan is provided with multiple fixing legs, and the quantity of fixing leg, position are corresponding with installation mounting assembly, and fixing leg is provided with the position-limited edge that can be caught in stopper slot；The position-limited edge of fixing leg is caught in the stopper slot of locating part, and locating part is fixed on blower tray, and fixing leg is pressed on blower tray, and the fan edge of cooling fan and the bracket edge of blower tray are in close contact.Mounting assembly is installed, make to be formed between cooling fan and blower tray and be effectively rigidly connected, change the Modal frequency of cooling fan system under the high temperature conditions, single order driving frequency of the cooling fan in high-speed cruising is avoided, solves the problems, such as steering wheel shake during cooling fan high-speed cruising under hot conditions.
Description
Technical field
The present invention relates to a kind of vibration damping cooling fan system and apply its automobile.
Background technology
Under the main trend of current automotive light weight technology, during a large amount of composites are applied to automotive development and produced.It is compound
The material mechanical performance variation with temperature of material, tend to be ignored early stage in exploitation, cause late design to be needed when changing
Substantial amounts of expense is wanted, automotive development progress has been had a strong impact on while increasing development cost.
For example, the fan of two grades of settings can switch to high-grade high-speed cruising in the case where environment temperature is higher.If fan
Support is made up of composite, and the system Modal frequency under the high temperature conditions of cooling fan and blower tray composition will
It is different from the Modal frequency under normal temperature condition.Cooling fan system, under normal temperature condition (21 degree) and under hot conditions (60
Degree) Modal frequency difference it is as shown in Figure 1.Wherein, dotted line represents the transfer curve under normal temperature condition, its single order
Intrinsic frequency is 49Hz；Solid line represents the transfer curve under hot conditions, and its first natural frequency is 43.7Hz.Cool down wind
The single order driving frequency fanned in high-speed cruising is 43-45Hz.It follows that when blower tray temperature raises, cooling fan
Single order driving frequency coupled with the Modal frequency of cooling fan system, produce resonance.
Therefore, in setting early stage mode requirement, mode of the cooling fan system under normal temperature condition is not only considered
It is required that it is contemplated that mode under the high temperature conditions requires.
The content of the invention
The technical problems to be solved by the invention are to overcome cooling fan system of the prior art in hot conditions
Under Modal frequency coupled with single order driving frequency during cooling fan high-speed cruising, produce resonance, shake steering wheel
The defects of violent, and a kind of vibration damping cooling fan system is provided and applies its automobile.
The present invention solves above-mentioned technical problem by the following technical programs：
The invention provides a kind of vibration damping cooling fan system, including blower tray, cooling fan and multiple installation suspensions
Component, the installation mounting assembly include locating part, and the locating part is circumferentially arranged with stopper slot；The cooling fan is provided with more
Individual fixing leg, the quantity of the fixing leg, position are corresponding with the installation mounting assembly, and the fixing leg is provided with energy
The position-limited edge being caught in the stopper slot；The position-limited edge of the fixing leg is caught in the stopper slot of the locating part, the limit
Position part is fixed on the blower tray, and the fixing leg is pressed on the blower tray, the fan side of the cooling fan
The bracket edge of edge and the blower tray is in close contact.
It is preferred that the blower tray has multiple putting holes, quantity, position and the locating part phase of the putting hole
Corresponding, the locating part is positioned in the putting hole.
It is preferred that the installation mounting assembly also includes fixing bolt, the locating part, which is additionally provided with, to be axially extended
Heart hole；The fixing bolt is fixed after passing through the centre bore of the locating part with the blower tray.
It is preferred that the installation mounting assembly also includes bushing, the bushing be located at the fixing bolt with it is described spacing
Between part.
It is preferred that the bushing includes sleeve and is fixed on the annular flange of the end of the sleeve, the sleeve insertion
In the centre bore, the annular flange is in contact with distal face of the locating part away from the blower tray, the fixation
Bolt is inserted in the centre bore, and the head of the fixing bolt is against in the annular flange.
It is preferred that the stopper slot is to the locating part towards the distance between proximal end face of the blower tray
The distance between 3.45mm, the stopper slot to distal face of the locating part away from the blower tray is 8.45mm.
It is preferred that the locating part is made up of elastomeric material.
It is preferred that the locating part is made up of rubber.
The invention provides a kind of automobile, the automobile includes above-mentioned vibration damping cooling fan system.
It on the basis of common sense in the field is met, above-mentioned each optimum condition, can be combined, it is each preferably real to produce the present invention
Example.
The positive effect of the present invention is：
The vibration damping cooling fan system and apply its automobile, in the case where not changing miscellaneous part, by installation
The structure design of mounting assembly, enables fixing leg to be effectively pressed on blower tray, at the same the fan edge of cooling fan with
The bracket edge of blower tray is in close contact, and is formed between cooling fan and blower tray and is effectively rigidly connected, extremely successful
Ground changes the Modal frequency of vibration damping cooling fan system under the high temperature conditions, avoids cooling fan in high-speed cruising
When single order driving frequency, steering wheel shake when finally solving the problems, such as cooling fan high-speed cruising under hot conditions.
Brief description of the drawings
Fig. 1 is the test of Modal frequency of the existing vibration damping cooling fan system under normal temperature condition and hot conditions
Datagram.
Fig. 2 is the structural representation of one embodiment of the invention vibration damping cooling fan system.
Fig. 3 is the partial enlarged drawing of the a-quadrant of the vibration damping cooling fan system shown in Fig. 2.
Fig. 4 is the partial enlarged drawing of the B area of the vibration damping cooling fan system shown in Fig. 2.
Fig. 5 is the front view of the vibration damping cooling fan system shown in Fig. 2.
Fig. 6 is the sectional view of the vibration damping cooling fan system shown in Fig. 5.
Fig. 7 is the partial enlarged drawing of the vibration damping cooling fan system shown in Fig. 6.
Fig. 8 is the relative position schematic diagram of the blower tray and fixing leg shown in Fig. 2.
Fig. 9 is locating part, the structural representation of bushing in the installation mounting assembly shown in Fig. 2.
Figure 10 is locating part, the front view of bushing shown in Fig. 9.
Figure 11 is locating part, the sectional view of bushing shown in Figure 10.
Figure 12 is the structural representation of the fixing bolt in the installation mounting assembly shown in Fig. 2.
Figure 13 is the installation mounting assembly and blower tray, the connection diagram of fixing leg shown in Fig. 2.
Figure 14 is the schematic diagram of the mechanical model of viscous damping system.
Figure 15 is the interior mechanics relation of cooling fan system of the prior art and the vibration damping cooling fan of the present embodiment
The comparison diagram of the interior mechanics relation of system.
Figure 16 be prior art vehicle steering and the present embodiment vehicle steering vibration comparison diagram.
Description of reference numerals
Blower tray 1
Putting hole 11
Connecting hole 12
Bracket edge 13
Cooling fan 2
Fixing leg 21
Position-limited edge 22
Fan edge 23
Mounting assembly 3 is installed
Locating part 31
Stopper slot 311
Centre bore 312
Proximal end face 313
Distal face 314
Fixing bolt 32
Head 321
Bushing 33
Sleeve 331
Annular flange 332
Embodiment
Various embodiments of the present invention will be described with reference to the drawings.In Figure of description, there is similar structures or work(
The element of energy will be represented with identical component symbol.It is to be appreciated that accompanying drawing is only to facilitate each reality of the explanation present invention
Example is applied, is not intended to carry out the present invention explanation of exhaustive, nor limiting the scope of the present invention.
The one of vibration damping cooling fan system of the present invention implements for example shown in Fig. 2 to Figure 13.The vibration damping cooling fan system bag
Include blower tray 1, cooling fan 2 and four installation mounting assemblies 3 (as shown in Figure 2 and Figure 5).As shown in Fig. 3 to Figure 13, installation
Mounting assembly 3 includes locating part 31, and locating part 31 is circumferentially arranged with stopper slot 311；Cooling fan 2 is provided with four fixing legs
21, each fixing leg 21 is fixed on blower tray 1 by an installation mounting assembly 3, and fixing leg 21 is provided with and can be caught in
Position-limited edge 22 in stopper slot 311, the position-limited edge 22 of fixing leg 21 are caught in the stopper slot 311 of locating part 31, locating part 31
It is fixed on blower tray 1, fixing leg 21 is pressed on blower tray 1, fan edge 23 and the blower tray 1 of cooling fan 2
Bracket edge 13 be in close contact.The quantity of the fixing leg 21 of the present embodiment is four, the actually quantity of fixing leg 21
It can be adjusted according to the actual requirements.
Generally, when driving force frequency is equal or close with system frequency, the amplitude of forced vibration reaches
It is maximum.This phenomenon is referred to as resonating.
Single-mode system is most basic vibrational system.Although practical structures are many-degrees of freedom system, single-degree-of-freedom
The analysis of system can disclose many basic characteristics of vibrational system.
For viscous damping system, it is assumed that its damping force is directly proportional to vibration velocity, and direction is with speed on the contrary, i.e.
The mechanical model of viscous damping system is as shown in figure 14.Its oscillating movement equation is：
In formula：X and f is time t function.
For free vibration (f=0), above formula can be written as：
Its solve form be：X=Xest (1-4)
In formula：S is plural number；X is the amount independent of the time.
Laplace transform is carried out to (1-2) formula both sides, and assumes that initial value is 0, can be obtained
(ms2+ cs+k) x (s)=f (s) (1-5)
In formula：S is the Laplace transformation factor；X (s) is x (t) Laplace transformation, and f (s) is then f (t) Laplace transformation.
For free vibration, it can obtain
ms2+ cs+k=0 (1-6)
S two roots can be solved by above formula,
In formula,For the undamped natural frequency of a mechanical system of system；ζ is damping ratio.
ζ is dimensionless factor.General steel construction belongs to small damping, ζ=0.01~0.1, and the damping to ζ ＜ 1 is referred to as owing resistance
Buddhist nun.
The derivation of multiple degrees of freedom intrinsic frequency is similar with above-mentioned derivation, and how many free degree is with regard to how many rank mode.In a word,
Mode is the build-in attribute of system.Wherein, the effective rigidity of the intrinsic frequency under certain first-order modal and the rank mode, effective mass
It is relevant, by changing the effective rigidity of system, effective mass with regard to the intrinsic frequency of certain first-order modal can be changed.
Specific to the present embodiment, by changing the structure of installation mounting assembly 3, so as to change cooling fan 2 and fan branch
The annexation of frame 1, the interior mechanics relation of whole system is just changed, so as to change the intrinsic frequency of the first-order modal of whole system
Rate.
It is further elucidated above as shown in figure 15, wherein, M1 is the quality of cooling fan 2, and M2 is the quality of blower tray 1,
K1 is the rigidity of installation mounting assembly 3, and K2 is the coupling stiffness of blower tray 1 and vehicle body.
Figure shown on the left of Figure 15 is the interior mechanics relation of the cooling fan system of prior art, it is known that, existing peace
After cooling fan 2 is connected by dress mounting assembly 3 with blower tray 1, not it is rigidly connected between cooling fan 2 and blower tray 1,
With stiffness K 1.And the present embodiment is improved installation mounting assembly 3, by installing mounting assembly 3 by fixing leg 21
It is pressed on blower tray 1, the fan edge 23 of cooling fan 2 is in close contact with the bracket edge 13 of blower tray 1, makes cooling wind
Formed and be rigidly connected between fan 2 and blower tray 1, as shown in the figure on the right side of Figure 15.
By improvement of the present embodiment to installation mounting assembly 3, the effective rigidity of whole cooling fan system and effective matter
Amount changes, and the Modal frequency of the system under the high temperature conditions is reduced to below 40Hz, successfully avoid 43~
45Hz single order driving frequency, finally solves the problems, such as steering wheel shake during 2 high-speed cruising of cooling fan under hot conditions.
As shown in figure 8 and 13, blower tray 1 has multiple putting holes 11, quantity, position and the locating part of putting hole 11
31 is corresponding, and locating part 31 is positioned in putting hole 11.Putting hole 11 is used to accommodate locating part 31, is limited and limited by putting hole 11
The position of position part 31, further ensure formation between cooling fan 2 and blower tray 1 and be rigidly connected.
A kind of preferable structure of installation mounting assembly 3 of the present embodiment is as shown in Fig. 9 to Figure 12.Wherein, Fig. 9 to Figure 11 is
The structural representation of locating part 31 and bushing 33, Figure 12 are the structural representation of fixing bolt 32.
The connection of the installation mounting assembly 3 and blower tray 1, fixing leg 21 is as shown in figure 13, and locating part 31 is to pass through
Fixing bolt 32 is fixed on blower tray 1.Its concrete structure is：Locating part 31 is additionally provided with the centre bore axially extended
312；Fixing bolt 32 is fixed after passing through the centre bore 312 of locating part 31 with blower tray 1.Wherein, blower tray 1 (is placed
The bottom surface in hole 11) on can also be provided with connecting hole 12, fixing bolt 32 is inserted in the connecting hole 12 and connected with the screw thread of connecting hole 12
Connect, or through again being fixed fixing bolt 32 by other fixtures after the connecting hole 12.
In order to increase the intensity of locating part 31, ensure that fixing bolt 32 can be stably fixed in locating part 31, fixed spiral shell
Bushing 33 is additionally provided between bolt 32 and locating part 31.Specifically, as shown in Figures 9 to 11, bushing 33 includes sleeve 331 and consolidated
Due to the annular flange 332 of the end of sleeve 331, sleeve 331 is inserted in centre bore 312, and annular flange 332 and locating part 31 are remote
Distal face 314 from blower tray 1 is in contact, and fixing bolt 32 is inserted in centre bore 312, and the head 321 of fixing bolt 32 is supported
In annular flange 332.By setting above-mentioned bushing 33, it is ensured that the intensity and fixing bolt 32 of locating part 31 are in locating part 31
In position, so as to ensure that being rigidly connected between cooling fan 2 and blower tray 1.
As shown in Figure 10, by data analysis and test, near-end of the stopper slot 311 to locating part 31 towards blower tray 1
The distance between face 313 L1Preferably 3.45mm, between distal face 314 of the stopper slot 311 to locating part 31 away from blower tray 1
Distance L2Preferably 8.45mm.Using the locating part 31 of the size, to changing the intrinsic frequency of mode of system under the high temperature conditions
Rate is highly effective, can successfully avoid single order driving frequency during cooling fan high-speed cruising.
Above-mentioned locating part 31 is preferably made up of elastomeric material, is further preferably made up of rubber.Use elastomer
Locating part 31 made of material, it fixing leg 21 is pressed on blower tray 1, make cooling fan 2 and fan branch
Formed between frame 1 and be effectively rigidly connected.Rubber has especially excellent cold resistance, wearability and elasticity, also has preferable
Ageing-resistant performance, therefore locating part 31 is preferably made up of rubber.
By the above-mentioned structure design to installing mounting assembly 3, fixing leg 21 is set effectively to be pressed in blower tray 1
On, the fan edge 23 of cooling fan 2 is in close contact with the bracket edge 13 of blower tray 1, cooling fan 2 and blower tray 1
Between formed and be effectively rigidly connected.The structure design of above-mentioned vibration damping cooling fan system, changes the system very successfully
Modal frequency under the high temperature conditions, avoid single order driving frequency of the cooling fan in high-speed cruising.
The vibration damping cooling fan system of above-described embodiment is installed on automobile, and tested.It is existing under hot conditions
The vibration comparison diagram of the vehicle steering of technology and the vehicle steering of the present embodiment is as shown in figure 16.It is existing skill on the left of Figure 16
The vibration acceleration of the vehicle steering of art, Figure 16 right sides are the vibration acceleration of the vehicle steering of the present embodiment.It can be seen that adopt
After the vibration damping cooling fan system of the present embodiment, the vibration amplitude of vehicle steering substantially reduces, and solves under hot conditions
The problem of steering wheel during cooling fan high-speed cruising is shaken.
The present invention is not limited to the above-described embodiments, no matter making any change in its shape or structure, all falls within this hair
Within bright protection domain.Protection scope of the present invention is defined by the appended claims, and those skilled in the art exists
On the premise of without departing substantially from principle and essence of the invention, various changes or modifications, but these can be made to these embodiments
Change and modification each fall within protection scope of the present invention.
Claims (9)
- A kind of 1. vibration damping cooling fan system, it is characterised in that including：Blower tray；Multiple installation mounting assemblies, the installation mounting assembly include locating part, and the locating part is circumferentially arranged with stopper slot；Cooling fan, the cooling fan are provided with multiple fixing legs, and the quantity of the fixing leg, position hang with the installation Put that component is corresponding, the fixing leg is provided with the position-limited edge that can be caught in the stopper slot；The position-limited edge of the fixing leg is caught in the stopper slot of the locating part, and the locating part is fixed on the blower tray On, the fixing leg is pressed on the blower tray, the fan edge of the cooling fan and the support of the blower tray Edge is in close contact.
- 2. vibration damping cooling fan system as claimed in claim 1, wherein, the blower tray has multiple putting holes, described The quantity of putting hole, position are corresponding with the locating part, and the locating part is positioned in the putting hole.
- 3. vibration damping cooling fan system as claimed in claim 1, wherein, the installation mounting assembly also includes fixing bolt, The locating part is additionally provided with the centre bore axially extended；The fixing bolt through the locating part centre bore after with it is described Blower tray is fixed.
- 4. vibration damping cooling fan system as claimed in claim 3, wherein, the installation mounting assembly also includes bushing, described Bushing is between the fixing bolt and the locating part.
- 5. vibration damping cooling fan system as claimed in claim 4, wherein, the bushing includes sleeve and is fixed on the sleeve End annular flange, the sleeve inserted in the centre bore, and the annular flange is with the locating part away from the wind The distal face of fan support is in contact, and the fixing bolt is inserted in the centre bore, and the head of the fixing bolt is against described In annular flange.
- 6. vibration damping cooling fan system as claimed in claim 1, wherein, the stopper slot to the locating part is towards the wind The distance between the proximal end face for fanning support is 3.45mm, the stopper slot to distal end of the locating part away from the blower tray The distance between face is 8.45mm.
- 7. vibration damping cooling fan system as claimed in claim 1, wherein, the locating part is made up of elastomeric material.
- 8. vibration damping cooling fan system as claimed in claim 1, wherein, the locating part is made up of rubber.
- A kind of 9. automobile, it is characterised in that：The automobile includes the vibration damping cooling fan system described in any one of claim 1 to 8 System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711160883.2A CN107781024A (en) | 2017-11-20 | 2017-11-20 | Vibration damping cooling fan system and apply its automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711160883.2A CN107781024A (en) | 2017-11-20 | 2017-11-20 | Vibration damping cooling fan system and apply its automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107781024A true CN107781024A (en) | 2018-03-09 |
Family
ID=61429649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711160883.2A Pending CN107781024A (en) | 2017-11-20 | 2017-11-20 | Vibration damping cooling fan system and apply its automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107781024A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113722840A (en) * | 2021-11-03 | 2021-11-30 | 江铃汽车股份有限公司 | Predictive analysis method for transverse jitter in acceleration process of new energy vehicle |
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| CN113722840B (en) * | 2021-11-03 | 2022-02-08 | 江铃汽车股份有限公司 | Predictive analysis method for transverse jitter in acceleration process of new energy vehicle |
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