CN104595290A - Hydraulic inerter with initiative and controllable inert coefficient - Google Patents
Hydraulic inerter with initiative and controllable inert coefficient Download PDFInfo
- Publication number
- CN104595290A CN104595290A CN201410835474.8A CN201410835474A CN104595290A CN 104595290 A CN104595290 A CN 104595290A CN 201410835474 A CN201410835474 A CN 201410835474A CN 104595290 A CN104595290 A CN 104595290A
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- oil
- hydraulic
- hydraulic cylinder
- controlled
- constant displacement
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Classifications
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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
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
- F16F9/5126—Piston, or piston-like valve elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/06—Characteristics of dampers, e.g. mechanical dampers
- B60G17/08—Characteristics of fluid dampers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a hydraulic inerter with the initiative and controllable inert coefficient. The hydraulic inerter comprises a dual-ejector-rod hydraulic cylinder. Two oil inlets/outlets of the hydraulic cylinder are access to a rectifying loop, two parallel connection branches are arranged on the rectifying loop, a first hydraulic one-way valve and a second hydraulic one-way valve which are arranged face to face are in serial connection to the first branch, and a third hydraulic one-way valve and a fourth hydraulic one-way valve which are arranged back to back are in serial connection to the second branch. The middle end of the second branch is connected with an inlet of a one-way quantitative hydraulic motor and an inlet of a proportional flow valve through pipelines, an outlet of the one-way quantitative hydraulic motor and an outlet of the proportional flow valve are connected with the middle end of the first branch through pipelines, and the shaft end of the one-way quantitative hydraulic motor is connected with a fly wheel. The initiative adjustable inerter can change self parameters at any time according to vehicle driving situations and road situations to adapt to the optimal driving state of a vehicle.
Description
Technical field
The present invention relates to a kind of used container, be specifically related to the controlled hydraulic pressure of a kind of used appearance coefficient active and be used to container.
Background technique
Used container has the function similar to electric capacity, namely can block the transmission of low frequency signal, and this characteristic makes it on automotive suspension, have important using value.Existing used structure of container is the used capacitance device being surely used to hold coefficient, and this quantitatively used container can only be applied in the middle of the passive suspension of automobile, and its used appearance coefficient that initiatively cannot change self according to road conditions, does not have good road worthiness.
Adopt the reason of the unidirectional bridge commutating circuit of hydraulic pressure, be used to container due to existing hydraulic pressure generally to adopt two-way quantitative motor, and automobile is generally in more stable running condition, power F and the piston displacement of now oil hydraulic cylinder generation are less, and generally there is friction torque in oil hydraulic motor, when oil hydraulic cylinder vibrates back and forth near equinoctial point, the flow of oil hydraulic motor will be caused to occur minor fluctuations, and motor is in forward and reversely frequently to slowly run, motor will produce viscous, the phenomenon such as to creep, make the response lag of used container, desirable used appearance effect can not be reached.
Summary of the invention
Technical problem to be solved by this invention is to provide the controlled hydraulic pressure of a kind of used appearance coefficient active and is used to container, and it can be applied in active or semi-active suspension.
For solving the problems of the technologies described above, the present invention is used to hold the coefficient technical solution that initiatively controlled hydraulic pressure is used to container and is:
Comprise two outlet-rod hydraulic cylinder, cylinder body 2 upper end of oil hydraulic cylinder is provided with oil hydraulic cylinder case 3, and the piston rod of oil hydraulic cylinder connects wheel contact 1, and oil hydraulic cylinder case 3 connects vehicle body contact 4; The oil inlet and outlet port of oil hydraulic cylinder accesses commutating circuit respectively, commutating circuit is provided with two branch roads parallel with one another, first branch road is in series with the 3rd hydraulically-controlled one-way valve 6 and the 4th hydraulically-controlled one-way valve 8 that two the first hydraulically-controlled one-way valves 5 and the second hydraulically-controlled one-way valve 7, second branch road installed face-to-face are in series with two back-to-back installations; The middle-end of the second branch road connects the entrance of unidirectional constant displacement hydraulic motor 10 and proportional flow control valve 9 through pipeline, the outlet of unidirectional constant displacement hydraulic motor 10 and proportional flow control valve 9 is connected the middle-end of the first branch road through pipeline; The axle head of unidirectional constant displacement hydraulic motor 10 connects flywheel 11.
Described proportional flow control valve 9 is solenoid-operated proportional Flow valve.
When described oil hydraulic cylinder is in compression stroke, hydraulic oil flows into unidirectional bridge group by oil hydraulic cylinder upper end-hole, and hydraulic oil to be punished with the parallel branch of unidirectional constant displacement hydraulic motor 10 at proportional flow control valve 9 and flowed after the 3rd hydraulically-controlled one-way valve 6; Hydraulic oil through proportional flow control valve 9 and unidirectional constant displacement hydraulic motor 10 enters unidirectional bridge group again, and hydraulic oil passes back into oil hydraulic cylinder by the second hydraulically-controlled one-way valve 7 through oil hydraulic cylinder lower end mouth; When described oil hydraulic cylinder is in stretching travel, hydraulic oil flows into unidirectional bridge group by oil hydraulic cylinder lower end mouth, and hydraulic oil to be punished with the parallel branch of unidirectional constant displacement hydraulic motor 10 at proportional flow control valve 9 and flowed after the 4th hydraulically-controlled one-way valve 8; Hydraulic oil through proportional flow control valve 9 and unidirectional constant displacement hydraulic motor 10 enters unidirectional bridge group again, and hydraulic oil passes back into oil hydraulic cylinder by the first hydraulically-controlled one-way valve 5 through oil hydraulic cylinder upper end-hole.
Change the flow of described proportional flow control valve 9 place branch road, to change the flow of unidirectional constant displacement hydraulic motor 10 place branch road, thus initiatively change used appearance coefficient.
The change method of described used appearance coefficient is: the flow reducing proportional flow control valve 9 place branch road, to increase the flow of unidirectional constant displacement hydraulic motor 10 place branch road, thus increases used container used appearance coefficient; The flow of scaling up Flow valve 9 place branch road, to reduce the flow of unidirectional constant displacement hydraulic motor 10 place branch road, thus reduces used container used appearance coefficient.
Following formula is followed in the change of described used appearance coefficient:
Wherein, b holds coefficient for used,
J is the rotary inertia of flywheel 11,
The ratio of a% oil hydraulic cylinder total discharge shared by the flow of proportional flow control valve 9 branch road,
for the volumetric efficiency of unidirectional constant displacement hydraulic motor 10,
for mechanical efficiency,
A is the lifting surface area of hydraulic cylinder piston,
V is the discharge capacity of unidirectional constant displacement hydraulic motor 10.
The technique effect that the present invention can reach is:
The adjustable used container of active provided by the present invention, according to the traveling of automobile and condition of road surface, can change the parameter of self at any time, to adapt to the optimum drive state of automobile.
The present invention has the unidirectional bridge group of rectification function by arranging, oil hydraulic motor can be made to keep the rotation of fixed-direction, avoid motor positive and negative rotation continually, thus reach good used appearance effect.
The present invention, by adjusting the flow of the Proportional valve in parallel with oil hydraulic motor, to change used appearance coefficient, thus can be applied in active or semi-active suspension.
The present invention controls simply, is easy to realize.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 be the present invention be used to hold coefficient initiatively controlled hydraulic pressure be used to the schematic diagram of container.
Description of reference numerals in figure:
1 is wheel contact, and 2 is two outlet-rod hydraulic cylinder cylinder bodies,
3 is oil hydraulic cylinder case, and 4 is vehicle body contact,
5 is the first hydraulically-controlled one-way valve, and 6 is the 3rd hydraulically-controlled one-way valve,
7 is the second hydraulically-controlled one-way valve, and 8 is the 4th hydraulically-controlled one-way valve,
9 is solenoid-operated proportional Flow valve, and 10 is unidirectional constant displacement hydraulic motor,
11 is flywheel.
Embodiment
As shown in Figure 1, the present invention is used to hold the controlled hydraulic pressure of coefficient active and is used to container, and comprise two outlet-rod hydraulic cylinder, the upper end of the cylinder body 2 of oil hydraulic cylinder is provided with oil hydraulic cylinder case 3, and the piston rod of oil hydraulic cylinder connects wheel contact 1, and oil hydraulic cylinder case 3 connects vehicle body contact 4;
The oil inlet and outlet port of oil hydraulic cylinder accesses commutating circuit respectively, commutating circuit is provided with two branch roads parallel with one another, the first hydraulically-controlled one-way valves 5 and the second hydraulically-controlled one-way valve 7(i.e. circulating direction of the first hydraulically-controlled one-way valve 5 that first branch road are in series with two face-to-face installations are from the bottom to top, the circulating direction of the second hydraulically-controlled one-way valve 7 is from top to bottom), the 3rd hydraulically-controlled one-way valve 6 and the 4th hydraulically-controlled one-way valve 8(i.e. circulating direction of the 3rd hydraulically-controlled one-way valve 6 that second branch road are in series with two back-to-back installations are from top to bottom, the circulating direction of the 4th hydraulically-controlled one-way valve 8 is from the bottom to top),
The middle-end (namely between the 3rd hydraulically-controlled one-way valve 6 with the 4th hydraulically-controlled one-way valve 8) of the second branch road is connected the entrance of unidirectional constant displacement hydraulic motor 10 and solenoid-operated proportional Flow valve 9 through pipeline, the outlet of unidirectional constant displacement hydraulic motor 10 and solenoid-operated proportional Flow valve 9 connects the middle-end (namely between the first hydraulically-controlled one-way valve 5 and the second hydraulically-controlled one-way valve 7) of the first branch road through pipeline;
The axle head of unidirectional constant displacement hydraulic motor 10 connects flywheel 11.
The present invention be used to hold coefficient initiatively controlled hydraulic pressure to be used to the working principle of container as follows:
In vehicle traveling process, along with the vibration of automobile, the two ends (i.e. wheel contact 1 and vehicle body contact 4) of used container will produce directed force F, and this directed force F causes the piston two ends of oil hydraulic cylinder to produce pressure reduction
, make the fluid in oil hydraulic cylinder flow in commutating circuit;
Ignore hydraulic cylinder piston frictional force, the pressure loss and piston rod quality, then have:
Hydraulic cylinder force:
formula 1
The fuel-displaced flow of oil hydraulic cylinder:
formula 2
Wherein, A is the lifting surface area of hydraulic cylinder piston,
for the pressure reduction at piston two ends,
for the movement velocity of hydraulic cylinder piston;
When oil hydraulic cylinder is in compression stroke, hydraulic oil flows into unidirectional bridge group by oil hydraulic cylinder upper end-hole, now the first hydraulically-controlled one-way valve 5 is in cut-off state, 3rd hydraulically-controlled one-way valve 6 is in circulation status, 4th hydraulically-controlled one-way valve 8 is in closed condition, and hydraulic oil to be punished with the parallel branch of unidirectional constant displacement hydraulic motor 10 at solenoid-operated proportional Flow valve 9 and flowed after the 3rd hydraulically-controlled one-way valve 6; Now by changing the flow of solenoid-operated proportional Flow valve 9 place branch road, the flow of unidirectional constant displacement hydraulic motor 10 place branch road can be changed, thus reach and initiatively changes oil hydraulic motor and be used to appearance coefficient object;
Hydraulic oil through solenoid-operated proportional Flow valve 9 and unidirectional constant displacement hydraulic motor 10 enters unidirectional bridge group again, now due to the back pressure effect of the first hydraulically-controlled one-way valve 5, first hydraulically-controlled one-way valve 5 is in cut-off state, and hydraulic oil will pass back into oil hydraulic cylinder by the second hydraulically-controlled one-way valve 7 through oil hydraulic cylinder lower end mouth;
When oil hydraulic cylinder is in stretching travel, hydraulic oil is then according to path backflow one circle of " oil hydraulic cylinder lower end mouth à the 4th hydraulically-controlled one-way valve 8 à solenoid-operated proportional Flow valve 9 and unidirectional constant displacement hydraulic motor 10 upper end à solenoid-operated proportional Flow valve 9 and unidirectional constant displacement hydraulic motor 10 lower end à first hydraulically-controlled one-way valve 5 à oil hydraulic cylinder upper end-hole ".
No matter oil hydraulic cylinder of the present invention is in compression or stretching travel, and under the rectified action of unidirectional bridge group, hydraulic oil is flowed to the lower end of motor all the time by the upper end of motor, thus the Double-directional rotary of the oil hydraulic motor be used in container by hydraulic pressure becomes unidirectional movement.
The principle being changed used appearance coefficient by the flow changing solenoid-operated proportional Flow valve 9 place branch road is as follows:
The flow of unidirectional constant displacement hydraulic motor 10:
formula 3
Wherein,
for the flow of solenoid-operated proportional Flow valve 9,
for the flow of unidirectional constant displacement hydraulic motor 10,
V is the discharge capacity of unidirectional constant displacement hydraulic motor 10,
N is the rotating speed of unidirectional constant displacement hydraulic motor 10,
for the volumetric efficiency of unidirectional constant displacement hydraulic motor 10;
The torque of unidirectional constant displacement hydraulic motor 10:
formula 4
Wherein,
for the pressure reduction (i.e. unidirectional constant displacement hydraulic motor 10 two ends pressure reduction) at piston two ends,
for mechanical efficiency,
V is the discharge capacity of unidirectional constant displacement hydraulic motor 10;
Regulate the flow of solenoid-operated proportional Flow valve 9 place branch road, when
for
's
times time, had by formula 2, formula 3:
formula 5
Then flywheel:
formula 6
Wherein, m is flywheel mass,
R is flywheel radius,
for flywheel angular acceleration;
Then have:
formula 7
Then hydraulic pressure is used to the used appearance coefficient of container and is:
Wherein, b holds coefficient for used,
J is the rotary inertia of flywheel 11,
for the volumetric efficiency of unidirectional constant displacement hydraulic motor 10;
for mechanical efficiency,
A is the lifting surface area of hydraulic cylinder piston,
V is the discharge capacity of unidirectional constant displacement hydraulic motor 10;
Can find out, change the uninterrupted of solenoid-operated proportional Flow valve 9, the size of a% can be changed, thus can realize changing the used object holding coefficient b, realize the active adjustable control to used container.
When road conditions are severe, automotive body vibration will obviously aggravate, now, when oil hydraulic cylinder fuel-displaced flow Q is certain, by controller control ratio Flow valve amplifier, reduce the control electric current of solenoid-operated proportional Flow valve 9, then reduce the flow of solenoid-operated proportional Flow valve 9 place branch road, to increase the flow of unidirectional constant displacement hydraulic motor 10 place branch road, can realize initiatively controllably increasing the object of being used to container and being used to hold coefficient, make the used appearance power that used container can provide larger, reduce the vibration of vehicle body; On the contrary, under the situation that road conditions are level and smooth, increase the flow of solenoid-operated proportional Flow valve 9 place branch road, to reduce the flow of unidirectional constant displacement hydraulic motor 10 place branch road, used container and suspension rate, resistance of shock absorber are matched, make whole suspension work under the situation of optimum, reach good riding comfort and driving stability.
Claims (6)
1. the used controlled hydraulic pressure of coefficient active that holds is used to container, it is characterized in that: comprise two outlet-rod hydraulic cylinder, cylinder body (2) upper end of oil hydraulic cylinder is provided with oil hydraulic cylinder case (3), and the piston rod of oil hydraulic cylinder connects wheel contact (1), and oil hydraulic cylinder case (3) connects vehicle body contact (4);
The oil inlet and outlet port of oil hydraulic cylinder accesses commutating circuit respectively, commutating circuit is provided with two branch roads parallel with one another, first branch road is in series with two the first hydraulically-controlled one-way valves (5) and the second hydraulically-controlled one-way valve (7) installed face-to-face, the second branch road is in series with the 3rd hydraulically-controlled one-way valve (6) and the 4th hydraulically-controlled one-way valve (8) of two back-to-back installations;
The middle-end of the second branch road connects the entrance of unidirectional constant displacement hydraulic motor (10) and proportional flow control valve (9) through pipeline, the outlet of unidirectional constant displacement hydraulic motor (10) and proportional flow control valve (9) is connected the middle-end of the first branch road through pipeline;
The axle head of unidirectional constant displacement hydraulic motor (10) connects flywheel (11).
2. the controlled hydraulic pressure of used appearance coefficient active according to claim 1 is used to container, it is characterized in that: when described oil hydraulic cylinder is in compression stroke, hydraulic oil flows into unidirectional bridge group by oil hydraulic cylinder upper end-hole, and hydraulic oil is punished in the parallel branch of proportional flow control valve (9) and unidirectional constant displacement hydraulic motor (10) and flowed after the 3rd hydraulically-controlled one-way valve (6); Hydraulic oil through proportional flow control valve (9) and unidirectional constant displacement hydraulic motor (10) enters unidirectional bridge group again, and hydraulic oil passes back into oil hydraulic cylinder by the second hydraulically-controlled one-way valve (7) through oil hydraulic cylinder lower end mouth;
When described oil hydraulic cylinder is in stretching travel, hydraulic oil flows into unidirectional bridge group by oil hydraulic cylinder lower end mouth, and hydraulic oil is punished in the parallel branch of proportional flow control valve (9) and unidirectional constant displacement hydraulic motor (10) and flowed after the 4th hydraulically-controlled one-way valve (8); Hydraulic oil through proportional flow control valve (9) and unidirectional constant displacement hydraulic motor (10) enters unidirectional bridge group again, and hydraulic oil passes back into oil hydraulic cylinder by the first hydraulically-controlled one-way valve (5) through oil hydraulic cylinder upper end-hole.
3. the controlled hydraulic pressure of used appearance coefficient active according to claim 1 is used to container, it is characterized in that: the flow changing described proportional flow control valve (9) place branch road, to change the flow of unidirectional constant displacement hydraulic motor (10) place branch road, thus initiatively change used appearance coefficient.
4. the controlled hydraulic pressure of used appearance coefficient active according to claim 3 is used to container, it is characterized in that: the change method of described used appearance coefficient is: the flow reducing proportional flow control valve (9) place branch road, to increase the flow of unidirectional constant displacement hydraulic motor (10) place branch road, thus increase used container used appearance coefficient; The flow of scaling up Flow valve (9) place branch road, to reduce the flow of unidirectional constant displacement hydraulic motor (10) place branch road, thus reduces used container used appearance coefficient.
5. used appearance coefficient adjustable hydraulic according to claim 3 is used to container, it is characterized in that: following formula is followed in the change of described used appearance coefficient:
Wherein, b holds coefficient for used,
J is the rotary inertia of flywheel (11),
The ratio of a% oil hydraulic cylinder total discharge shared by the flow of proportional flow control valve (9) branch road,
for the volumetric efficiency of unidirectional constant displacement hydraulic motor (10),
for mechanical efficiency,
A is the lifting surface area of hydraulic cylinder piston,
V is the discharge capacity of unidirectional constant displacement hydraulic motor (10).
6. used appearance coefficient adjustable hydraulic according to claim 1 is used to container, it is characterized in that: described proportional flow control valve (9) is solenoid-operated proportional Flow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410835474.8A CN104595290A (en) | 2014-12-30 | 2014-12-30 | Hydraulic inerter with initiative and controllable inert coefficient |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410835474.8A CN104595290A (en) | 2014-12-30 | 2014-12-30 | Hydraulic inerter with initiative and controllable inert coefficient |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546037A (en) * | 2016-02-24 | 2016-05-04 | 浙江大学台州研究院 | Active control type inerter |
| CN110962520A (en) * | 2019-11-28 | 2020-04-07 | 江苏大学 | Inertia mass coefficient multi-stage adjustable inertia volume device and control method thereof |
| CN111137095A (en) * | 2020-01-17 | 2020-05-12 | 江苏大学 | Rigidity and damping multistage adjustable hydro-pneumatic suspension and control method |
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| US3784228A (en) * | 1971-10-22 | 1974-01-08 | Hoesch Ag | Regulating apparatus for a fluid controlled car suspension |
| US20070132197A1 (en) * | 2005-12-10 | 2007-06-14 | Zf Friedrichshafen Ag | Actuator for an active chassis of a motor vehicle |
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| CN111137095A (en) * | 2020-01-17 | 2020-05-12 | 江苏大学 | Rigidity and damping multistage adjustable hydro-pneumatic suspension and control method |
| CN111137095B (en) * | 2020-01-17 | 2022-12-16 | 江苏大学 | Rigidity and damping multistage adjustable hydro-pneumatic suspension and control method |
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Inventor after: Ge Zheng Inventor after: Wang Weirui Inventor after: Yu Peng Inventor after: Shi Haoran Inventor before: Wang Weirui Inventor before: Ge Zheng Inventor before: Yu Peng Inventor before: Shi Haoran |
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Free format text: CORRECT: INVENTOR; FROM: WANG WEIRUI GE ZHENG YU PENG SHI HAORAN TO: GE ZHENG WANG WEIRUI YU PENG SHI HAORAN |
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Application publication date: 20150506 |
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