CN108252789A - Vibration damping cooling fan mounting bracket and apply its cooling system, automobile - Google Patents
Vibration damping cooling fan mounting bracket and apply its cooling system, automobile Download PDFInfo
- Publication number
- CN108252789A CN108252789A CN201711160521.3A CN201711160521A CN108252789A CN 108252789 A CN108252789 A CN 108252789A CN 201711160521 A CN201711160521 A CN 201711160521A CN 108252789 A CN108252789 A CN 108252789A
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- Prior art keywords
- fan
- installing plate
- cooling fan
- mounting bracket
- vibration damping
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- 238000001816 cooling Methods 0.000 title claims abstract description 120
- 238000013016 damping Methods 0.000 title claims abstract description 49
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 45
- 239000003351 stiffener Substances 0.000 claims description 18
- 210000003205 muscle Anatomy 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention provides a kind of vibration damping cooling fan mounting bracket and apply its cooling system, automobile, the vibration damping cooling fan mounting bracket, including fan installing plate, wide plate, narrow boards and two side plates, the centre of the fan installing plate is equipped with fan accommodating space, two side plates are located at the both sides of the fan installing plate respectively, the wide plate is located at the top of the fan installing plate, the narrow boards is located at the lower section of the fan installing plate, the surface of the narrow boards is equipped with narrow boards reinforcing rib, the fan installing plate, side plate, wide plate, narrow boards and narrow boards reinforcing rib are integrally formed.The vibration damping cooling fan mounting bracket and apply its cooling system, automobile, change effective rigidity, the effective mass of cooling fan mounting bracket first-order modal, change the first-order modal intrinsic frequency of cooling fan mounting bracket, single order driving frequency of the cooling fan in high-speed cruising is avoided, finally 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 mounting bracket and apply its cooling system, automobile.
Background technology
Under the main trend of current automotive light weight technology, during a large amount of composite materials are applied to automotive development and produce.It is compound
The material mechanical performance variation with temperature of material tends to be ignored early period in exploitation, and late design is caused to be needed when changing
A large amount of expense is wanted, automotive development progress has been seriously affected 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 cooling
Fan-mounting support is made of composite material, the mode of the cooling system that cooling fan and mounting bracket form under the high temperature conditions
Intrinsic frequency will be different from the Modal frequency under normal temperature condition.The cooling system of cooling fan and mounting bracket composition,
The difference of (21 degree) and the Modal frequency of (60 degree) under hot conditions is as shown in Figure 1 under normal temperature condition.Wherein, dotted line generation
Transfer curve under table normal temperature condition, first natural frequency 49Hz；Solid line represents the transmission function under hot conditions
Curve, first natural frequency 43.7Hz.Single order driving frequency of the cooling fan in high-speed cruising is 43-45Hz.Thus
It is found that when cooling fan mounting bracket temperature increases, the single order driving frequency of cooling fan and the mode of cooling system are intrinsic
Frequency couples, and generates resonance.
Therefore, in setting early period mode requirement, mode requirement of the cooling system under normal temperature condition is not only considered,
It is contemplated that mode requirement under the high temperature conditions.
Invention content
The technical problems to be solved by the invention are in order to which cooling fan and mounting bracket of the prior art is overcome to form
Cooling system Modal frequency under the high temperature conditions coupled with single order driving frequency during cooling fan high-speed cruising, produce
Raw resonance, makes steering wheel shake the defects of violent, and provides a kind of vibration damping cooling fan mounting bracket and apply its cooling system
System, automobile.
The present invention solves above-mentioned technical problem by the following technical programs：
The present invention provides a kind of vibration damping cooling fan mounting bracket, including fan installing plate, wide plate, narrow boards and two sides
Plate, the centre of the fan installing plate are equipped with fan accommodating space, and two side plates are respectively positioned at the fan installing plate
Both sides, the wide plate are located at the top of the fan installing plate, and the narrow boards is located at the lower section of the fan installing plate, described narrow
The surface of plate is equipped with narrow boards reinforcing rib, and the fan installing plate, side plate, wide plate, narrow boards and narrow boards reinforcing rib are integrally formed.
Preferably, the narrow boards reinforcing rib includes crisscross narrow boards stiffener, the narrow boards stiffener is integrally formed
In on the narrow boards.
Preferably, the front of the fan installing plate is equipped with front reinforcing rib, the front reinforcing rib includes crisscross
Front stiffener, the front stiffener is shaped on the fan installing plate.
Preferably, the back side of the fan installing plate is equipped with back side reinforcing rib, the back side reinforcing rib includes crisscross
Back side stiffener, the back side stiffener is shaped on the fan installing plate.
Preferably, being additionally provided with fan speed adjusting resistance putting hole on the fan installing plate, the fan speed adjusting resistance is placed
Hole is used to accommodate the speed adjusting resistance of cooling fan.
Preferably, the fan installing plate is equipped with arc reinforcing rib, the arc reinforcing rib and the fan installing plate
It is integrally formed, the arc reinforcing rib is between the fan accommodating space, fan speed adjusting resistance putting hole.
Preferably, the arc reinforcing rib is set around the edge of the fan accommodating space.
The present invention also provides a kind of cooling systems, it includes cooling fan and above-mentioned vibration damping cooling fan mounting bracket,
The cooling fan is located in the fan accommodating space, and the cooling fan is fixed on the vibration damping cooling fan mounting bracket
On.
Preferably, the fan installing plate is equipped with multiple fan mounting holes, multiple fan mounting holes are along the wind
The circumferentially disposed of accommodating space is fanned, the cooling fan is by passing through the fixing bolt of the cooling fan, fan mounting holes to consolidate
It is scheduled on the fan installing plate.
The present invention also provides a kind of automobiles, it includes above-mentioned cooling system.
On the basis of common knowledge of the art, above-mentioned each optimum condition can be combined arbitrarily to get each preferable reality of the present invention
Example.
The positive effect of the present invention is：
The vibration damping cooling fan mounting bracket and apply its cooling system, automobile, in the situation for not changing other component
Under, the structure of cooling fan mounting bracket is changed, changes the effective firm of cooling fan mounting bracket first-order modal
Degree, effective mass, change the first-order modal intrinsic frequency of cooling fan mounting bracket, avoid 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.
Description of the drawings
Fig. 1 is the cooling system of cooling fan mounting bracket in the prior art and cooling fan composition in normal temperature condition and height
The test data figure of Modal frequency under the conditions of temperature.
Fig. 2 is the schematic diagram of the mechanical model of viscous damping system.
Fig. 3 is the positive schematic diagram of one embodiment of the invention vibration damping cooling fan mounting bracket.
Fig. 4 is the schematic diagram at the back side of vibration damping cooling fan mounting bracket shown in Fig. 3.
Fig. 5 is the structure diagram of one embodiment of the invention cooling system.
Fig. 6 is the cooling fan mounting bracket of the prior art and the vibration damping cooling fan mounting bracket of the present embodiment in room temperature
The comparison diagram of Modal frequency and fan installation point origin dynamic stiffness under state.
Fig. 7 is the comparison diagram of the vibration values of the vehicle steering wheel of the prior art and the vehicle steering wheel of the present embodiment.
Reference sign
Cooling system 100
Vibration damping cooling fan mounting bracket 1
Fan installing plate 11
Fan accommodating space 12
Side plate 13
Wide plate 14
Narrow boards 15
Narrow boards reinforcing rib 16
Front reinforcing rib 17
Back side reinforcing rib 18
Fan speed adjusting resistance putting hole 19
Arc reinforcing rib 110
Fan mounting holes 111
Cooling fan 2
Specific 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 attached drawing is only to facilitate illustrate each reality of the present invention
Example is applied, is not intended to carry out the present invention exhaustive explanation, nor limiting the scope of the present invention.
Under normal circumstances, when driving force frequency is equal or close with system frequency, the amplitude of forced vibration reaches
It is maximum.This phenomenon is known 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 2.Its vibration motion equation is：
In formula：X and f is the function of time t.
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 for not depending on 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 the Laplace transformation of x (t), and f (s) is then the Laplace transformation of f (t).
For free vibration, it can obtain
ms2+ cs+k=0 (1-6)
Two roots of s can be solved by above formula,
In formula,Undamped natural frequency of a mechanical system for system；ζ is damping ratio.
ζ is dimensionless factor.General steel construction belongs to small damping, and ζ=0.01~0.1 is known as owing resistance to the damping of ζ ＜ 1
Buddhist nun.
The derivation of multiple degrees of freedom intrinsic frequency is similar with above-mentioned derivation, how many degree of freedom is with regard to how many rank mode.In short,
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 related, 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, vibration damping cooling fan mounting bracket 1 as shown in Figure 3 to Figure 4, including fan installing plate
11st, wide plate 14, narrow boards 15 and two side plates 13, the centre of fan installing plate 11 are equipped with fan accommodating space 12；Two side plates 13
It is located at the both sides of fan installing plate 11 respectively；Wide plate 14 is located at the top of fan installing plate 11；Narrow boards 15 is located at fan installing plate
11 lower section, fan installing plate 11, side plate 13, wide plate 14, narrow boards 15 are integrally formed.Cooling fan 2 is installed cold to the vibration damping
But on fan-mounting support 1 after, form cooling system 100 as shown in Figure 5.Wherein, cooling fan 2 is located at fan accommodating space
In 12, cooling fan 2 is fixed on vibration damping cooling fan mounting bracket 1.Specifically, fan installing plate 11 is equipped with multiple wind
Mounting hole 111 is fanned, multiple fan mounting holes 111 are along the circumferentially disposed of fan accommodating space 12, and cooling fan 2 is by passing through cooling
Fan 2, fan mounting holes 111 fixing bolt be fixed on fan installing plate 11.
It, can be by changing cooling fan mounting bracket to change the first-order modal intrinsic frequency of cooling system 100
Structure, so as to which the mode for changing the effective rigidity of cooling fan mounting bracket, effective mass is realized.In other words, cooling fan
The effective rigidity of mounting bracket, the change of effective mass can finally change the first-order modal intrinsic frequency of cooling system 100, into
Work(avoids the single order driving frequency of cooling fan 2, finally solves direction during 2 high-speed cruising of cooling fan under hot conditions
The problem of disk is shaken.
Specifically, as shown in Figure 3 to Figure 4, vibration damping cooling fan mounting bracket 1 can by increase narrow boards reinforcing rib 16,
The mode of front reinforcing rib 17, back side reinforcing rib 18 and arc reinforcing rib 110, to increase vibration damping cooling fan mounting bracket 1
Effective rigidity changes its effective mass.
Wherein, narrow boards reinforcing rib 16 is set to the surface of narrow boards 15.Narrow boards reinforcing rib 16 specifically includes crisscross narrow
Plate stiffener, narrow boards stiffener are shaped on narrow boards 15.Narrow boards 15 is that 1 rigidity of vibration damping cooling fan mounting bracket is most weak
Region increases narrow boards reinforcing rib 16 in narrow boards 15, can greatly improve the rigidity of vibration damping cooling fan mounting bracket 1, especially
There is good castering action to the rigidity of the bottom of fan installation point origin dynamic stiffness and vibration damping cooling fan mounting bracket 1.
In addition, front reinforcing rib 17 is set to the front of fan installing plate 11, front reinforcing rib 17 include it is crisscross just
Face stiffener, front stiffener are shaped on fan installing plate 11.Front reinforcing rib 17 increases vibration damping cooling fan peace
The whole rigidity of stent 1 is filled, the especially top to vibration damping cooling fan mounting bracket 1 and fan installation point origin dynamic stiffness has very
Good castering action.
In addition, back side reinforcing rib 18 is set to the back side of fan installing plate 11, back side reinforcing rib 18 includes the crisscross back of the body
Face stiffener, back side stiffener are shaped on fan installing plate 11.Back side reinforcing rib 18 increases vibration damping cooling fan peace
The whole rigidity of stent 1 is filled, the especially top to vibration damping cooling fan mounting bracket 1 and fan installation point origin dynamic stiffness has very
Good castering action.
In addition, being additionally provided with fan speed adjusting resistance putting hole 19 on fan installing plate 11, fan speed adjusting resistance putting hole 19 is used for
Accommodate the speed adjusting resistance of cooling fan 2.Arc reinforcing rib 110 is located at fan accommodating space 12, fan speed adjusting resistance putting hole 19
Between, arc reinforcing rib 110 is integrally formed with fan installing plate 11, improves fan accommodating space 12, fan speed adjusting resistance is put
Put the rigidity in the region between hole 19 and the rigidity of fan installation point.Arc reinforcing rib 110 is preferably around fan accommodating space 12
Edge setting, rigidity can be effectively improved in this way.
Targetedly increase reinforcing rib in the weaker key area of the rigidity of vibration damping cooling fan mounting bracket 1, it can be with
Effective rigidity is effectively improved, so as to improve first-order modal intrinsic frequency.Meanwhile increase reinforcing rib and be conducive to improve fan installation
Point origin dynamic stiffness is conducive to weaken transmission of the vibration of cooling fan 2 to vibration damping cooling fan mounting bracket 1.
It is illustrated in figure 6 the cooling fan mounting bracket of the prior art and the vibration damping cooling fan mounting bracket of the present embodiment
The comparison diagram of Modal frequency and fan installation point origin dynamic stiffness under normal temperature state, wherein, dotted line is existing skill
The Modal frequency of the cooling fan mounting bracket of art, mode of the solid line for the vibration damping cooling fan mounting bracket of the present embodiment
Intrinsic frequency.The Modal frequency of cooling fan mounting bracket has been increased to 65Hz from 53Hz as can be seen from Figure 6.According to survey
Examination and sunykatuib analysis, temperature raising and the connection of cooling fan and cooling fan mounting bracket can bring the reduction of 10Hz,
Therefore the vibration damping cooling fan mounting bracket of the present embodiment is plus after cooling fan, and the cooling system of composition is under the high temperature conditions
Mode is 55Hz, much avoids the single order driving frequency of the cooling fan of 43-45Hz.It is in addition, corresponding in 43-45Hz frequency ranges
Fan installation point origin dynamic stiffness, the vibration damping cooling fan mounting bracket of the present embodiment install branch than the cooling fan of the prior art
Frame is much higher.
After above-mentioned cooling system 100 is applied to automobile, and tested.Under hot conditions, the automobile side of the prior art
It is as shown in Figure 7 to the vibration values comparison diagram of disk and the vehicle steering wheel of the present embodiment.As it can be seen that the cooling system using the present embodiment
Afterwards, the vibration values of vehicle steering wheel substantially reduce, and solve steering wheel shake during cooling fan high-speed cruising under hot conditions
The problem of.
The present invention is not limited to the above-described embodiments, no matter making any variation 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
Under the premise of without departing substantially from the principle and substance of the present invention, many changes and modifications may be made, but these
Change and modification each fall within protection scope of the present invention.
Claims (10)
1. a kind of vibration damping cooling fan mounting bracket, which is characterized in that including：
Fan installing plate, the centre of the fan installing plate are equipped with fan accommodating space；
Two side plates, respectively positioned at the both sides of the fan installing plate；
Wide plate, the wide plate are located at the top of the fan installing plate；
Narrow boards, the narrow boards are located at the lower section of the fan installing plate, and the surface of the narrow boards is equipped with narrow boards reinforcing rib；
The fan installing plate, side plate, wide plate, narrow boards and narrow boards reinforcing rib are integrally formed.
2. vibration damping cooling fan mounting bracket as described in claim 1, wherein, the narrow boards reinforcing rib includes crisscross
Narrow boards stiffener, the narrow boards stiffener are shaped on the narrow boards.
3. vibration damping cooling fan mounting bracket as described in claim 1, wherein, the front of the fan installing plate is equipped with front
Reinforcing rib, the front reinforcing rib include crisscross front stiffener, and the front stiffener is shaped in the wind
It fans on installing plate.
4. vibration damping cooling fan mounting bracket as described in claim 1, wherein, the back side of the fan installing plate is equipped with the back side
Reinforcing rib, the back side reinforcing rib include crisscross back side stiffener, and the back side stiffener is shaped in the wind
It fans on installing plate.
5. vibration damping cooling fan mounting bracket as described in claim 1, wherein, it is additionally provided with fan tune on the fan installing plate
Fast resistance putting hole, the fan speed adjusting resistance putting hole are used to accommodate the speed adjusting resistance of cooling fan.
6. vibration damping cooling fan mounting bracket as claimed in claim 5, wherein, the fan installing plate is strengthened equipped with arc
Muscle, the arc reinforcing rib and the fan installing plate are integrally formed, the arc reinforcing rib be located at the fan accommodating space,
Between fan speed adjusting resistance putting hole.
7. vibration damping cooling fan mounting bracket as claimed in claim 6, wherein, the arc reinforcing rib is housed around the fan
The edge setting in space.
8. a kind of cooling system, which is characterized in that it includes cooling fan and claim 1~7 any one of them vibration damping is cold
But fan-mounting support, the cooling fan are located in the fan accommodating space, and the cooling fan is fixed on the vibration damping
On cooling fan mounting bracket.
9. cooling system as claimed in claim 8, wherein, the fan installing plate is equipped with multiple fan mounting holes, multiple
The fan mounting holes are circumferentially disposed along the fan accommodating space, the cooling fan by pass through the cooling fan,
The fixing bolt of fan mounting holes is fixed on the fan installing plate.
10. a kind of automobile, which is characterized in that it includes the cooling system described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711160521.3A CN108252789A (en) | 2017-11-20 | 2017-11-20 | Vibration damping cooling fan mounting bracket and apply its cooling system, automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711160521.3A CN108252789A (en) | 2017-11-20 | 2017-11-20 | Vibration damping cooling fan mounting bracket and apply its cooling system, automobile |
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| Publication Number | Publication Date |
|---|---|
| CN108252789A true CN108252789A (en) | 2018-07-06 |
Family
ID=62722137
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711160521.3A Pending CN108252789A (en) | 2017-11-20 | 2017-11-20 | Vibration damping cooling fan mounting bracket and apply its cooling system, automobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631247A (en) * | 2018-11-13 | 2019-04-16 | 青岛海尔空调电子有限公司 | Design method is evaded in air conditioner and its resonance |
| CN112360637A (en) * | 2020-10-23 | 2021-02-12 | 安徽江淮汽车集团股份有限公司 | Method for solving intermittent jitter in idling vehicle |
| CN113252259A (en) * | 2021-05-21 | 2021-08-13 | 江铃汽车股份有限公司 | Rigid body modal prediction method based on cooling module shock pad compression model |
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|---|---|---|---|---|
| CN109631247A (en) * | 2018-11-13 | 2019-04-16 | 青岛海尔空调电子有限公司 | Design method is evaded in air conditioner and its resonance |
| CN112360637A (en) * | 2020-10-23 | 2021-02-12 | 安徽江淮汽车集团股份有限公司 | Method for solving intermittent jitter in idling vehicle |
| CN113252259A (en) * | 2021-05-21 | 2021-08-13 | 江铃汽车股份有限公司 | Rigid body modal prediction method based on cooling module shock pad compression model |
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Application publication date: 20180706 |