CN109083969A - A kind of Calculation of pressure loss method of string series connection R formula vehicle shock absorber - Google Patents
A kind of Calculation of pressure loss method of string series connection R formula vehicle shock absorber Download PDFInfo
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- CN109083969A CN109083969A CN201810998336.XA CN201810998336A CN109083969A CN 109083969 A CN109083969 A CN 109083969A CN 201810998336 A CN201810998336 A CN 201810998336A CN 109083969 A CN109083969 A CN 109083969A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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- Physics & Mathematics (AREA)
- Geometry (AREA)
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- Evolutionary Computation (AREA)
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- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of Calculation of pressure loss methods of string series connection R formula vehicle shock absorber.On pipeline between upper bunker and lower bunker oil transportation mouth, it is connected with capillary tandem resistance trimming section, capillary tandem frequency modulation section in turn from top to bottom.Capillary tandem resistance trimming section includes four capillaries being sequentially connected in series, and the both ends of every capillary are parallel with its work of solenoid valve control.Capillary tandem frequency modulation section includes concatenated four road capillary；This four roads capillary is parallel with its work of solenoid valve control.The diameter of frequency modulation section minimum capillary is much larger than the diameter of resistance trimming section capillary.The present invention provides the calculation methods of the R formula vehicle shock absorber pressure loss, have reached the probabilistic purpose of reduction Controlling model.Theoretical foundation is provided to improve damper Control platform.
Description
Technical field
The present invention relates to hydraulic type automobile damper field more particularly to a kind of pressure of string series connection R formula vehicle shock absorber
Loss calculation method.
Background technique
The damping mode of automobile mainly has fluid pressure type, vapour-pressure type, electromagnetic type.Fluid pressure type is to use to obtain widest automobile at present
Damping mode.
Fig. 1 is the structural schematic diagram of existing string series connection R formula vehicle shock absorber；The work of string series connection R formula vehicle shock absorber
Principle refers to Patent No. ZL 201621442510.5, patent name is that a kind of matrix string series connection capillary variable system is solid
There is the damper of frequency.
The vehicle shock absorber includes vehicle frame, spring, axle, hydraulic cylinder, upper bunker, piston, lower bunker, resistance trimming section, frequency modulation
Section.
Resistance trimming section by concatenated 4 road capillary, solenoid valve block at.This 4 road capillary all disk is at M type.This 4 road capillary
It is capillary R8, R4, R2, R1 respectively；Their difference solenoid valve V in parallelR8、VR4、VR2、VR1.Electromagnetic valve for adjusting VR8、VR4、VR2、
VR1Configuration SRnI.e. adjustable damping.
Frequency modulation section by concatenated 4 road capillary, solenoid valve block at.This 4 road capillary all disk is at M type.This 4 road capillary
It is capillary m8, m4, m2, m1 respectively；Their difference solenoid valve V in parallelm8、Vm4、Vm2、Vm1.Minimum capillary is straight in frequency modulation section
Diameter dmminGreater than the maximum capillary diameter d of resistance trimming sectionRmaxOne times or more.Electromagnetic valve for adjusting Vm8、Vm4、Vm2、Vm1Configuration SmnI.e.
Adjustable systems intrinsic frequency.
The vehicle shock absorber working principle is that, when generating relative motion between vehicle frame and axle, piston can produce accordingly
Raw or up or down movement, the oil-based liquid in hydraulic cylinder can be by the resistance trimming between upper bunker hydraulic fluid port, lower bunker hydraulic fluid port at this time
Section, frequency modulation section；And then lower bunker is flowed to from upper bunker, or flow to upper bunker from lower bunker.
Due to the viscous effect of the intracorporal oil-based liquid of cylinder, when oil-based liquid flows through resistance trimming section, work in resistance trimming section
Capillary can generate resistance to the flowing of oil-based liquid, to form the resistance mobile to piston；The size of the resistance is by capillary
Pipe control system passes through the configuration S of solenoid valveRnControl, and then realize the resistance trimming of resistance trimming section.
When oil-based liquid flows through frequency modulation section, change the configuration S of frequency modulation section solenoid valve by capillary control systemmn, then
Adjustable vibration-damper participates in the synthesis quality of the oil-based liquid of oscillation, and then realizes the frequency modulation of frequency modulation section.
When controlling damper resistance, because of the Calculation of pressure loss method of not relatively good damper, institute
With the Controlling model of control system, thus there is certain uncertainties.How the uncertainty of Controlling model is reduced, this is
Damper industry suffers from a problem that.
Summary of the invention
The shortcomings that it is an object of the invention to overcome the above-mentioned prior art and deficiency provide a kind of string series connection R formula automobile and subtract
The Calculation of pressure loss method of vibration device, reaches and reduces the probabilistic purpose of Controlling model.
The present invention is achieved through the following technical solutions:
A kind of Calculation of pressure loss method of string series connection R formula vehicle shock absorber, which includes vehicle frame 11, axle
17 and hydraulic cylinder 13；Spring 12 is equipped between the vehicle frame 11 and axle 17；
The upper end of the hydraulic cylinder 13 connects axle by its piston rod connecting vehicle frame 11, the lower end cylinder body of hydraulic cylinder 13
17；Piston 15 in hydraulic cylinder 13 divides hydraulic cylinder 13 for upper bunker 14 and lower bunker 16；
On pipeline between 16 oil transportation mouth of the upper bunker 14 and lower bunker, it is connected with resistance trimming section in turn from top to bottom, adjusts
Frequency range；That is, the F hydraulic fluid port of resistance trimming section connects the A hydraulic fluid port of upper bunker 14, the I hydraulic fluid port of the E hydraulic fluid port connection frequency modulation section of resistance trimming section, frequency modulation
The J hydraulic fluid port of section connects the B hydraulic fluid port of lower bunker 16；
The Calculation of pressure loss method of vehicle shock absorber includes the following steps:
(1) value range of i, j are determined；
(2) the flow resistance R of all resistance trimming section working capillaries is calculatedfRi:
(3) total flow resistance R of tandem working resistance trimming section is calculatedfRt:
RfRt=∑i RfRi；
(4) the flow resistance R of all frequency modulation section working capillaries is calculatedfmj:
(5) total flow resistance R of tandem working frequency modulation section is calculatedfmt:
Rfmt=∑j Rfmj；
(6) vehicle shock absorber loss of total pressure is calculated:
∑ Δ p=(RfRt+Rfmt)·qt。
The resistance trimming section includes four capillaries being sequentially connected in series.
The both ends of every capillary of the resistance trimming section are parallel with solenoid valve.
Two interface ends of the resistance trimming section are respectively E hydraulic fluid port, F hydraulic fluid port；Four capillary sectional area phases of the resistance trimming section
Deng their length ratio is 8:4:2:1；I.e. their length is arranged according to 8421 binary coding rule.
The frequency modulation section includes four capillaries being sequentially connected in series.
The both ends of every capillary of the frequency modulation section are parallel with solenoid valve.
Two interface ends of the frequency modulation section are respectively I hydraulic fluid port, J hydraulic fluid port；Four capillary sectional area phases of the frequency modulation section
Deng their length ratio is 8:4:2:1；I.e. their length is arranged according to 8421 binary coding rule.
In four capillaries of the frequency modulation section, the diameter d of minimum capillarymminThan the maximum capillary diameter of resistance trimming section
dRmaxIt is twice above.
Capillary in the resistance trimming section and frequency modulation section, disk are at " M " shape, serpentine shape or spiral-shaped.
Solenoid valve in the resistance trimming section and frequency modulation section is also connect with capillary control system；Capillary control system is used for
Control the on-off of each solenoid valve.
Vehicle shock absorber operation logic is described as follows below:
As shown in Figure 1.
Vehicle shock absorber resistance trimming section includes that four capillaries are R8, R4, R2, R1 respectively；Their difference solenoid valve V in parallelR8、
VR4、VR2、VR1Control its work.
Vehicle shock absorber frequency modulation section includes that four capillaries are m8, m4, m2, m1 respectively；Their difference solenoid valve V in parallelm8、
Vm4、Vm2、Vm1Control its work.
Vehicle shock absorber operation logic is that, when generating relative motion between vehicle frame and axle, piston can generate accordingly
Or the movement of up or down, the oil-based liquid in hydraulic cylinder 13 can pass through the resistance trimming section and frequency modulation section between A hydraulic fluid port, B hydraulic fluid port at this time,
And then lower bunker 16 is flowed to from upper bunker 14, or flow to upper bunker 14 from lower bunker 16；
Due to the viscous effect of the intracorporal oil-based liquid of cylinder, when oil-based liquid flows through resistance trimming section, work in resistance trimming section
Capillary can generate resistance to the flowing of oil-based liquid, to form the resistance mobile to piston；The size of the resistance is by capillary
The configuration S that pipe control system passes through change resistance trimming section solenoid valveRnControl, and then realize the resistance trimming of resistance trimming section；
When oil-based liquid flows through frequency modulation section, change the configuration S of frequency modulation section solenoid valve by capillary control systemmn, then
Adjustable vibration-damper participates in the synthesis quality of the oil-based liquid of oscillation, and then realizes the frequency modulation of frequency modulation section.
Because determining configuration SRnWhen, using the Calculation of pressure loss method of vehicle shock absorber, to reduce damper
The uncertainty of Controlling model.
The Calculation of pressure loss method of present invention series connection R formula vehicle shock absorber is described further below:
(1), the Calculation of pressure loss of single capillary
Such as Fig. 2, it is assumed that capillary is straight tube, length l, internal diameter are d (d=2R, R: radius), horizontal positioned；It is filled in pipe
The liquid that full dynamic viscosity is μ makees Laminar Flow, and the flow of the working fluid is q.
The cylindrical body for taking one section of its axis to be overlapped in pipe with pipe axis, radius r act on cylindrical body upstream end
Fluid pressure is P1, the fluid pressure for acting on cylindrical body downstream is P2.When steady flow, according to newton module, institute
Cylindrical body is taken to have following equilibrium equation:
In above formula, u is the speed of liquid.Because of (P1-P2) be capillary pressure loss Δ p, so by formula (1-1)
It can obtain:
Formula (1-2) integral can be obtained:
Formula (1-3) shows: when liquid makees laminar motion in straight tube, speed is symmetrical with round tube center line and parabolically advises
Rule distribution.
Such as Fig. 2, it is to take one at r with a thickness of micro- annulus area of dr in radius, passes through the flow dq of this micro- annulus area
Are as follows:
Dq=u2 π rdr (1-4)
Formula (1-4) integral can be obtained:
We define the flow resistance R of capillaryfAre as follows:
Flow resistance RfUnit are as follows: Pas/m3。
It can be obtained by formula (1-5), formula (1-6):
Δ p=Rf·q (1-7)
Similar to the Ohm's law for describing electric current, voltage, sensitivity, we can also be write as formula (1-7):
(2), the Calculation of pressure loss of the resistance trimming section of more capillary tandem workings
As shown in Figure 1；
If the value range of i is the entirety of the capillary label to work in resistance trimming section capillary R1, R2, R4, R8.For example,
When all working in capillary R1, R2, R4, R8, the value range of i is then { 1,2,4,8 }；When capillary R1, R2, R4,
When only R1, R8 work in R8, the value range of i is then { 1,8 }；Remaining and so on.If the length of resistance trimming section working capillary Ri
Degree and diameter are respectively lRiAnd dRi, according to formula (1-6), then the flow resistance R of capillary RifRiCalculating formula are as follows:
If the pressure loss at the resistance trimming section both ends that work is Δ pRtIf the flow for the resistance trimming section that works is qtIf working resistance trimming section
Total flow resistance be RfRt.According to formula (1-8), then have:
Herein, the pressure loss Δ p at work resistance trimming section both endsRtIt is also the pressure loss at resistance trimming section both ends, while can also claims
For the resistance trimming section pressure loss；The flow q for the resistance trimming section that workstIt is also the flow of resistance trimming section；And the total flow resistance R for the resistance trimming section that worksfRtThen
It is only merely to participate in total flow resistance of the resistance trimming section capillary of work, and be not necessarily exactly total flow resistance of entire resistance trimming section.
When the more capillary tandem workings of resistance trimming section, the flow of every capillary is identical, is the flow q of resistance trimming sectiont.Suddenly
The slightly local pressure loss of capillary, every capillary pressure loss is then the product of its flow Yu its flow resistance.The series connection of resistance trimming section
The total pressure loss of capillary (namely the pressure loss Δ p at work resistance trimming section both endsRt) be the tandem working of resistance trimming section each hair
The sum of pressure loss of tubule, it may be assumed that
ΔpRt=∑i RfRi·qt (2-3)
It can be obtained by formula (2-2), formula (2-3):
RfRt=∑i RfRi (2-4)
Similar to series resistance circuit relationships, formula (2-4) can also be stated are as follows: when resistance trimming section capillary tandem working, work
Make total flow resistance R of resistance trimming sectionfRtEqual to the sum of the flow resistance for the resistance trimming section capillary for participating in work.
It can be obtained by formula (2-2), the pressure loss of resistance trimming section are as follows:
ΔpRt=RfRt·qt (2-5)
(3), the Calculation of pressure loss of the frequency modulation section of more capillary tandem workings
As shown in Figure 1；
If the value range of j is the entirety of the capillary label to work in frequency modulation section capillary m1, m2, m4, m8.For example,
When all working in capillary m1, m2, m4, m8, the value range of j is then { 1,2,4,8 }；When capillary m1, m2, m4,
When only m1, m8 work in m8, the value range of j is then { 1,8 }；Remaining and so on.If the length of frequency modulation section working capillary mj
Degree and diameter are respectively lmjAnd dmj, according to formula (1-6), then the flow resistance R of capillary mjfmjCalculating formula are as follows:
Because resistance trimming section, frequency modulation section are tandem workings, their flow is identical；That is, the flow of work frequency modulation section
It also is qt.If the pressure loss at the frequency modulation section both ends that work is Δ pmtIf the total flow resistance for the frequency modulation section that works is Rfmt, according to formula (1-
8), then have:
Herein, the pressure loss Δ p at work frequency modulation section both endsmtIt is also the pressure loss at frequency modulation section both ends, while can also claims
For the frequency modulation section pressure loss；The flow q for the frequency modulation section that workstIt is also the flow of frequency modulation section；And the total flow resistance R for the frequency modulation section that worksfmtThen
It is only merely to participate in total flow resistance of the frequency modulation section capillary of work, and be not necessarily exactly total flow resistance of entire frequency modulation section.
When the more capillary tandem workings of frequency modulation section, the flow of every capillary is identical, is the flow q of frequency modulation sectiont.Suddenly
The slightly local pressure loss of capillary, every capillary pressure loss is then the product of its flow Yu its flow resistance.The series connection of frequency modulation section
The total pressure loss of capillary (namely the pressure loss Δ p at work frequency modulation section both endsmt) be the tandem working of frequency modulation section each hair
The sum of pressure loss of tubule, it may be assumed that
Δpmt=∑j Rfmj·qt (3-3)
It can be obtained by formula (3-2), formula (3-3):
Rfmt=∑j Rfmj (3-4)
Similar to series resistance circuit relationships, formula (3-4) can also be stated are as follows: when frequency modulation section capillary tandem working, work
Make total flow resistance R of frequency modulation sectionfmtEqual to the sum of the flow resistance for the frequency modulation section capillary for participating in work.
It can be obtained by formula (3-2), the pressure loss of frequency modulation section are as follows:
Δpmt=Rfmt·qt (3-5)
(4), damper loss of total pressure ∑ Δ p is calculated
As shown in Figure 1, ignoring the pressure loss of connecting line, damper loss of total pressure ∑ Δ p is then resistance trimming section, frequency modulation
The sum of section pressure loss.It can be obtained according to formula (2-5), formula (3-5):
∑ Δ p=(RfRt+Rfmt)·qt (4-1)
Herein, the pressure loss of the damper loss of total pressure ∑ Δ p between upper bunker A hydraulic fluid port, lower bunker B hydraulic fluid port；It should
The loss of total pressure ∑ Δ p of damper is also referred to as vehicle shock absorber loss of total pressure.
(5), calculation method step
Summarize above-mentioned (two), (three), (four) part, the step of Calculation of pressure loss method of vehicle shock absorber is as follows:
(1) value range of i, j are determined；
(2) the flow resistance R of all resistance trimming section working capillaries is calculatedfRi:
(3) total flow resistance R of tandem working resistance trimming section is calculatedfRt:
RfRt=∑i RfRi；
(4) the flow resistance R of all frequency modulation section working capillaries is calculatedfmj:
(5) total flow resistance R of tandem working frequency modulation section is calculatedfmt:
Rfmt=∑j Rfmj；
(6) vehicle shock absorber loss of total pressure is calculated:
∑ Δ p=(RfRt+Rfmt)·qt。
The present invention compared with the existing technology, have following advantages and effects
The present invention provides the calculation methods of the R formula vehicle shock absorber pressure loss, and it is uncertain to have reached reduction Controlling model
The purpose of property.Theoretical foundation is provided to improve damper Control platform.
The present invention also has big use to the design level of raising R formula vehicle shock absorber, reduction testing expenses；To Hyundai Motor
The development of damping technology has beneficial effect positive, outstanding.
Detailed description of the invention
Fig. 1 is existing string series connection R formula vehicle shock absorber structural schematic diagram.
Fig. 2 is the single capillary pressure damage in the Calculation of pressure loss method of present invention string series connection R formula vehicle shock absorber
Lose the calculating figure of Δ p.
Specific embodiment
The present invention is more specifically described in detail combined with specific embodiments below.
Embodiment
As shown in Figure 1；
Resistance trimming section of connecting includes that four capillaries are R8, R4, R2, R1 respectively；Their difference solenoid valve V in parallelR8、VR4、
VR2、VR1Control its work.The length of capillary R1 is LR1；The length ratio of capillary R8, R4, R2, R1 are 8:4:2:1；They
Diameter be dR。
Frequency modulation section of connecting includes that four capillaries are m8, m4, m2, m1 respectively；Their difference solenoid valve V in parallelm8、Vm4、
Vm2、Vm1Control its work.The length L of capillary m1m1The half of length equal to resistance trimming section longest capillary R8；Capillary m8,
The length ratio of m4, m2, m1 are 8:4:2:1；Their diameter is 4dR。
The flow q of the dynamic viscosity μ of known damper oil-based liquid, damper resistance trimming sectiont。
Condition according to the present embodiment, we can first find out the dimensional parameters of resistance trimming section, all capillaries of frequency modulation section.So
Afterwards, loss of total pressure ∑ Δ p of the damper under various operating conditions can be calculated according to following steps:
(1) value range of i, j are determined；
(2) the flow resistance R of all resistance trimming section working capillaries is calculatedfRi:
(3) total flow resistance R of tandem working resistance trimming section is calculatedfRt:
RfRt=∑i RfRi；
(4) the flow resistance R of all frequency modulation section working capillaries is calculatedfmj:
(5) total flow resistance R of tandem working frequency modulation section is calculatedfmt:
Rfmt=∑j Rfmj；
(6) vehicle shock absorber loss of total pressure is calculated:
∑ Δ p=(RfRt+Rfmt)·qt。
In this way, capillary control system uses the Calculation of pressure loss method of vehicle shock absorber, so that it may reduce Controlling model
Uncertainty improves damper Control platform.
It in the present embodiment, can be very easily to each because realizing the Calculation of pressure loss method of analytic expression
Kind operating condition (value ranges of various i, j) is calculated.To provide theoretical foundation for the uncertainty of reduction Controlling model.
Now the present embodiment is described further by following 5 points.
1, the solenoid valve about resistance trimming section, the order of connection of frequency modulation section and control capillary work
Resistance trimming section, the order of connection of frequency modulation section, can also be in another order other than the sequential connection according to such as Fig. 1
Connection.In Fig. 1, every capillary has solenoid valve control its work, can also be with for remaining the capillary of work
It is unworthy of solenoid valve；That is, the quantity of capillary and the quantity of solenoid valve are also not necessarily exactly essentially equal.
2, the title about " string series connection R formula vehicle shock absorber "
In the title of " string series connection R formula vehicle shock absorber ", first " string " expression resistance trimming section string in " string series connection "
Connection formula capillary is adjusted, second " string " expression frequency modulation section is adjusted with tandem capillary.The meaning that its " R formula " indicates is as follows:
In the resistance trimming section of capillary, with capillary R8, R4, R2, R1 and its corresponding solenoid valve control system control
Under mode that the resistance (Resistance) of damper is adjusted.Its main feature is that: other than hydraulic cylinder body, according to capillary
The multichannel of series connection (or in parallel) (can be four tunnels and is also possible to non-four tunnel) capillary by resistance (Resistance) characteristic of pipe
Pipe according to specific parameter (such as: liquid under the inverse or some operating condition of area or length or flow resistance or flow resistance
The flow resistance etc. of pressure oil) according to certain rules (such as: the binary coding rule of 8421 equal ratios or it is other it is equal compare or
Person is non-equal than rule) arrangement, control is carried out by solenoid valve of the control system to corresponding capillary and adjusts resistance to reach
Purpose.The above is exactly the meaning in " the R formula " of resistance trimming section.
In frequency modulation section because we by capillary adjust frequency structure and in the way of with above-mentioned capillary adjust damping
Structure and mode have many similarities, so we will be reached using capillary and solenoid valve adjusts the intrinsic frequency of damper system
The mode of rate is also referred to as " R formula ".It is as follows in the meaning specific explanations of frequency modulation section, " R formula ":
In the frequency modulation section of capillary, with capillary m8, m4, m2, m1 and its corresponding solenoid valve control system control
Under mode that damper system intrinsic frequency is adjusted.Its main feature is that: other than hydraulic cylinder body, utilize capillary caliber
Its resistance (Resistance) small characteristic when big, according to the capacity characteristic of capillary, the multichannel by series connection (or in parallel) (can
Tetra- tunnel Yi Shi is also possible to non-four tunnel) capillary presses according to specific parameter (such as: area or length or volume etc.)
It is arranged according to certain rule (such as: the binary coding rule of 8421 equal ratios or other equal ratios are non-equal than regular), it is logical
Control system is crossed to control the solenoid valve of corresponding capillary, realizes the tune of the synthesis quality to the hydraulic oil for participating in oscillation
Section, to achieve the purpose that adjust damper system intrinsic frequency.
As long as it is known as R formula by us when damper has any one meaning in above-mentioned two " R formula " meaning
Damper or R formula vehicle shock absorber.In R formula damper, when existing capillary resistance trimming section also has capillary frequency modulation section,
Resistance trimming section, the number of frequency modulation section capillary can be equal, can not also wait.
In R formula damper, how carefully capillary is not necessarily intended to, so-called carefully just to refer to meeting when hydraulic oil flows through capillary
Generate resistance；That is, the capillary described in us is exactly the oil pipe or oil circuit that can generate resistance when hydraulic oil flows through.
The capillary of R formula damper can also be processed in addition to being processed into " M " shape helically shaped, serpentine shape etc. other
Shape.These types of shape is only specific listed several shapes, and many shapes can also be set out in practical applications, can be according to tool
Depending on body requires flexibly.The material for making these capillary oil circuits can be steel, copper, various alloys, nonmetallic materials etc.；Production
The method that the method for capillary oil circuit can be method, the method for machining, the 3D printing manufacture using shaping pipe processing
Deng.
3, about the operation instruction of formula
For Newtonian fluid in stationary flow, laminar condition, it is assumed that capillary is horizontal positioned straight tube, is ignoring capillary
In the case where the local pressure loss of pipe, the pressure loss of connecting line, the present invention is deduced calculation formula above.If
Actual operating mode and above-mentioned condition, hypothesis difference are bigger, then formula has error.With in the past without these formula the case where
Compare, even if formula has error, System Discrimination for control system can also reduce control using calculation method of the invention
The uncertainty of model provides theoretical foundation to improve damper Control platform.Certainly, calculation method according to the present invention, then
In addition some tests, can also be modified this calculation method；To further improve damper Control platform.
4, about vehicle shock absorber spring
Spring in damper of the present invention, can be with using gas spring, hydro-pneumatic spring etc. other than using helical spring
Other springs.
5, about series connection resistance trimming section capillary pipe length, flow resistance, the linear relationship of the pressure loss
In the present embodiment, because the length ratio of capillary R8, R4, R2, R1 are 8:4:2:1, their diameter is dR；
So the ratio of the flow resistance of resistance trimming section capillary R8, R4, R2, R1 is also 8:4:2:1；Resistance trimming section capillary R8, R4, R2, R1's
The ratio of the pressure loss is also 8:4:2:1.It can be seen that in the present embodiment, length, flow resistance, the pressure of resistance trimming section capillary
There is linear relationship between loss.
As described above, the present invention can be better realized.
Embodiment of the present invention are not limited by the above embodiments, other are any without departing from Spirit Essence of the invention
With changes, modifications, substitutions, combinations, simplifications made under principle, equivalent substitute mode should be, be included in of the invention
Within protection scope.
Claims (10)
1. a kind of Calculation of pressure loss method of string series connection R formula vehicle shock absorber, which includes vehicle frame (11), axle
(17) and hydraulic cylinder (13)；Spring (12) are equipped between the vehicle frame (11) and axle (17)；
The upper end of the hydraulic cylinder (13) connects axle by its piston rod connecting vehicle frame (11), the lower end cylinder body of hydraulic cylinder (13)
(17)；Hydraulic cylinder (13) is divided into upper bunker (14) and lower bunker (16) by the piston (15) in hydraulic cylinder (13)；
On pipeline between the upper bunker (14) and lower bunker (16) oil transportation mouth, it is connected with resistance trimming section in turn from top to bottom, adjusts
Frequency range；That is, the F hydraulic fluid port of resistance trimming section connects the A hydraulic fluid port of upper bunker (14), the I hydraulic fluid port of the E hydraulic fluid port connection frequency modulation section of resistance trimming section is adjusted
The J hydraulic fluid port of frequency range connects the B hydraulic fluid port of lower bunker (16)；
It is characterized in that, the Calculation of pressure loss method of vehicle shock absorber includes the following steps:
(1) value range of i, j are determined；
(2) the flow resistance R of all resistance trimming section working capillaries is calculatedfRi:
(3) total flow resistance R of tandem working resistance trimming section is calculatedfRt:
RfRt=∑i RfRi；
(4) the flow resistance R of all frequency modulation section working capillaries is calculatedfmj:
(5) total flow resistance R of tandem working frequency modulation section is calculatedfmt:
Rfmt=∑j Rfmj；
(6) vehicle shock absorber loss of total pressure is calculated:
∑ Δ p=(RfRt+Rfmt)·qt。
2. the Calculation of pressure loss method of string series connection R formula vehicle shock absorber according to claim 1, it is characterised in that: described
Resistance trimming section includes four capillaries being sequentially connected in series.
3. the Calculation of pressure loss method of string series connection R formula vehicle shock absorber according to claim 2, it is characterised in that: described
The both ends of every capillary of resistance trimming section are parallel with solenoid valve.
4. the Calculation of pressure loss method of string series connection R formula vehicle shock absorber according to claim 3, it is characterised in that: described
Two interface ends of resistance trimming section are respectively E hydraulic fluid port, F hydraulic fluid port；Four capillary sectional areas of the resistance trimming section are equal, their length
The ratio between be 8:4:2:1；I.e. their length is arranged according to 8421 binary coding rule.
5. the Calculation of pressure loss method of string series connection R formula vehicle shock absorber according to claim 1, it is characterised in that: described
Frequency modulation section includes four capillaries being sequentially connected in series.
6. the Calculation of pressure loss method of string series connection R formula vehicle shock absorber according to claim 5, it is characterised in that: described
The both ends of every capillary of frequency modulation section are parallel with solenoid valve.
7. the Calculation of pressure loss method of string series connection R formula vehicle shock absorber according to claim 6, it is characterised in that: described
Two interface ends of frequency modulation section are respectively I hydraulic fluid port, J hydraulic fluid port；Four capillary sectional areas of the frequency modulation section are equal, their length
The ratio between be 8:4:2:1；I.e. their length is arranged according to 8421 binary coding rule.
8. the Calculation of pressure loss method of string series connection R formula vehicle shock absorber according to claim 5, it is characterised in that: described
In four capillaries of frequency modulation section, the diameter d of minimum capillarymminThan the maximum capillary diameter d of resistance trimming sectionRmaxBe twice with
On.
9. special according to claim 1 to the Calculation of pressure loss method of string series connection R formula vehicle shock absorber described in any one of 8
Sign is: the capillary in the resistance trimming section and frequency modulation section, disk are at " M " shape, serpentine shape or spiral-shaped.
10. the Calculation of pressure loss method of string series connection R formula vehicle shock absorber according to claim 9, it is characterised in that: described
Solenoid valve in resistance trimming section and frequency modulation section is also connect with capillary control system；Capillary control system is for controlling each solenoid valve
On-off.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576959A (en) * | 2016-02-25 | 2016-05-11 | 上海斐讯数据通信技术有限公司 | Dynamic voltage automatic adjustment circuit and method |
| CN106594155A (en) * | 2016-12-27 | 2017-04-26 | 华南理工大学 | Operation method of double-series capillary system-natural-frequency-variable automobile shock absorber |
| CN106678252A (en) * | 2016-12-27 | 2017-05-17 | 华南理工大学 | Operating method of automobile shock absorber with capillary tubes connected in series and in parallel and with variable system inherent frequency |
| CN106678253A (en) * | 2016-12-27 | 2017-05-17 | 华南理工大学 | Damper provided with matrix series capillary tubes and variable system natural frequency |
| CN108194565A (en) * | 2018-01-26 | 2018-06-22 | 华南理工大学 | The string series connection R formulas vehicle shock absorber and method that a kind of single turbine recovers energy |
-
2018
- 2018-08-29 CN CN201810998336.XA patent/CN109083969A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576959A (en) * | 2016-02-25 | 2016-05-11 | 上海斐讯数据通信技术有限公司 | Dynamic voltage automatic adjustment circuit and method |
| CN106594155A (en) * | 2016-12-27 | 2017-04-26 | 华南理工大学 | Operation method of double-series capillary system-natural-frequency-variable automobile shock absorber |
| CN106678252A (en) * | 2016-12-27 | 2017-05-17 | 华南理工大学 | Operating method of automobile shock absorber with capillary tubes connected in series and in parallel and with variable system inherent frequency |
| CN106678253A (en) * | 2016-12-27 | 2017-05-17 | 华南理工大学 | Damper provided with matrix series capillary tubes and variable system natural frequency |
| CN108194565A (en) * | 2018-01-26 | 2018-06-22 | 华南理工大学 | The string series connection R formulas vehicle shock absorber and method that a kind of single turbine recovers energy |
Non-Patent Citations (2)
| Title |
|---|
| 张碧栋: "《连续玻璃纤维成形原理译文集》", 30 November 1982 * |
| 罗志昌: "《流体网络理论》", 30 November 1988 * |
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