CN103195856A - Parameter variable hydro-pneumatic spring - Google Patents
Parameter variable hydro-pneumatic spring Download PDFInfo
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- CN103195856A CN103195856A CN2013101169366A CN201310116936A CN103195856A CN 103195856 A CN103195856 A CN 103195856A CN 2013101169366 A CN2013101169366 A CN 2013101169366A CN 201310116936 A CN201310116936 A CN 201310116936A CN 103195856 A CN103195856 A CN 103195856A
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Abstract
A parameter variable hydro-pneumatic spring comprises a hydraulic cylinder and an energy storage device. The interior of the hydraulic cylinder is divided into a rod liquid cavity and a rodless liquid cavity through a piston, and the two cavities are communicated through a damping hole disposed on the piston. The interior of the energy storage device is divided into an air cavity and a liquid cavity through an elastic diaphragm, and the two liquid cavities arranged in the hydraulic cylinder are respectively communicated with the liquid cavity arranged in the energy storage device through pipes and valves such as a circulation area regulation valve. The parameter variable hydro-pneumatic spring further comprises an additional air chamber communicated with the air cavity arranged in the energy storage device, the air circulation area of the additional air chamber can be adjusted, air charging and discharging can be achieved through air holes arranged on the additional air chamber or the energy storage device, and accordingly adjustment of rigidity, damping and height of the hydro-pneumatic spring can be achieved. The parameter variable hydro-pneumatic spring is simple in structure, low in manufacture difficulty and flexible to arrange during installation.
Description
Technical field
The present invention relates to a kind of carrying vibration damping components and parts, particularly a kind of variable element hydro-pneumatic spring can be used for suspending of vehicle body or operator cabin etc. and play the effect of spring and damper, its rigidity, damping and highly all can regulate.
Background technique
Hydro-pneumatic spring is the core component of hydro pneumatic suspension, is to utilize the compression of gas to come the elastic element of stored energy, and be to come out in the development of the basis of diaphragm typeair spring.Its adopts canister as air chamber, as elastic element, and fluid is arranged as intermediate medium with the nitrogen of inertia between piston and gas.Hydro-pneumatic spring is divided into integral type and split type according to the position of the relative oil hydraulic cylinder of accumulator, whether separate according to gas-liquid in the accumulator and to be divided into not separated type and with the separated Oil-gas Separation formula of a flexible sheet of oil gas, be divided into single air chamber, two air chamber, two stage atmospheric pressure formula according to the accumulator form.Single chamber hydragas spring has only an air chamber, piston is reciprocating in oil hydraulic cylinder, thereby cause gas compression or expansion in the air chamber, hydraulic oil inflow and outflow in each chamber, the damping function that the elastic force that the gas distortion produces and fluid produce has realized elasticity and the damping function of hydro-pneumatic spring respectively.Double chamber hydragas spring is the hydro-pneumatic spring that the back pressure air chamber is arranged, and Duos a back-pressure air chamber than single chamber hydragas spring, and this air chamber also claims the back pressure chamber.Characteristics have been that the air chamber of elastic buffer effect is made up of two air chambers of positive and negative pressure, when hydro-pneumatic spring is in compression stroke, main piston inwardly moves, and fluid flows into accumulator, and the indoor gas of positive pressure gas is compressed, meanwhile the volume of annular chamber increases, the volume of back-pressure air chamber is also along with increase, and air pressure is corresponding to be reduced, namely during compression stroke, positive pressure chamber gas pressure increases, and back pressure chamber gas pressure reduces; Vice versa, and when namely reducing stroke, positive pressure chamber gas pressure reduces, and back pressure chamber gas pressure increases.Two-stage pressure type hydro-pneumatic spring also has two air chambers, and one is low-pressure chamber, and another is plenum chamber, and two air chambers are not communicated with, when piston stroke is little, and the oil liquid pressure in each chamber of oil hydraulic cylinder little (being low pressure stage), only low-pressure chamber's work this moment.When piston stroke increased, the oil pressure of hydraulic pressure cavity increased (high pressure phase), at this moment low-pressure chamber and plenum chamber co-operation.
Can guarantee that clearance does not change with the variation of load because the automobile of hydro pneumatic suspension is installed, the vibration frequency under the different loads is constant and can reduce characteristics such as pitch vibration and roll vibration to a certain extent.Exploitation and research work that hydro-pneumatic spring is relevant more and more come into one's own.
ZL201110314016.6 discloses and a kind ofly can realize all adjustable hydro-pneumatic springs of damping and rigidity, and can change the height of vehicle body, but owing in its clutch release slave cylinder pressurized gas and floating piston are arranged, certainly will cause its required setting height(from bottom) much bigger, and this cause practical application on vehicle; Fluid directly contacts at two places with pressurized gas, has increased the possibility of fluid emulsification; Cavity is more, complex structure; The scope that damping is regulated is also limited.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, a kind of damping of mainly being made up of 3 cylinder bodies, rigidity and highly equal controllable hydro-pneumatic springs are provided, its mounting arrangements in suspension is more flexible, the novel hydro-pneumatic spring of fluid emulsion can not take place again, and damp adjustable range is bigger.
In order to achieve the above object, the present invention adopts following technological scheme:
Variable element hydro-pneumatic spring of the present invention, comprise oil hydraulic cylinder, accumulator, it is characterized in that oil hydraulic cylinder inside is divided into by piston bar liquid container and no bar liquid container are arranged, and these two cavitys are connected by the damping hole on the piston, accumulator inside is divided into air chamber and liquid container by elastic diaphragm, and two liquid container are communicated with liquid container in the accumulator by pipeline and valve respectively in the oil hydraulic cylinder, also comprises an auxiliary chamber that is connected with air chamber in the accumulator by pipeline and valve.
The volume of described auxiliary chamber is not more than 2 times of air chamber maximum volume in the accumulator.
Described auxiliary chamber can be the sealed cavity of arbitrary shape.
Gas in described auxiliary chamber and the accumulator air chamber is inert gas, as nitrogen.
Described auxiliary chamber or accumulator air chamber wall are provided with a pore, can connect air inflation discharging control device and realize filling, exitting.
Described cylinder wall is provided with an oilhole, can replenish hydraulic oil by this oilhole.
The valve that arranges in no bar liquid container and the accumulator path in the described oil hydraulic cylinder comprises an one-way valve and a circulation area modulating valve, and one-way valve is only opened when fluid flows into accumulator by no bar liquid container.It is a circulation area modulating valve that the valve that arranges in bar liquid container and the accumulator path is arranged.
The valve that arranges in described auxiliary chamber and the accumulator path is a circulation area modulating valve.
The invention has the beneficial effects as follows:
1. adopt accumulator to be connected with oil hydraulic cylinder, auxiliary chamber respectively by pipeline, reduced required height is installed, increased flexibility and the Applicable scope of arranging.
2. the employing diaphragm accumulator has prevented the emulsification of fluid.
3. increased auxiliary chamber, strengthened the volume of pressurized gas, can further reduce the rigidity of spring, and along with the path size adjustment, rigidity can be adjustable continuously within the specific limits, and supervene certain air damping, is more conducive to attenuation vibration.
4. regulate vehicle body height and soil rigidity by charging and discharging gas.
5. the size by fluid path between valve regulated oil hydraulic cylinder and the accumulator liquid container realizes the damping size adjustment.
Description of drawings
Fig. 1 is structural principle schematic representation of the present invention.
In the accompanying drawing: 1, oil hydraulic cylinder, 2, piston, 3, control valve, 4, oil pipe, 5, control valve, 6, one-way valve, 7, accumulator, 8, pore, 9, tracheae, 10, control valve, 11, auxiliary chamber, 12, oilhole.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, the present invention is by oil hydraulic cylinder 1, piston 2, control valve 3, oil pipe 4, control valve 5, one-way valve 6, accumulator 7, pore 8, tracheae 9, control valve 10, compositions such as auxiliary chamber 11 and oilhole 12.Oil hydraulic cylinder inside is divided into no bar liquid container A and bar liquid container B is arranged by piston, and these two cavitys are connected by the damping hole on the piston.Accumulator inside is divided into air chamber C and liquid container D by elastic diaphragm.In A chamber and the accumulator D chamber path one-way valve 6 and circulation area modulating valve 5 are set in the oil hydraulic cylinder, 6 on one-way valve is opened when fluid flows into the D chamber from the A chamber, the size of path when circulation area modulating valve 5 is used for changing fluid from inflow D chamber, A chamber.The circulation of B chamber and accumulator D chamber arranges circulation area modulating valve 3 in the pipeline in the oil hydraulic cylinder, the size of path when being used for control B chamber and D chamber fluid and circulating mutually.In accumulator C chamber and the auxiliary chamber connecting pipeline circulation area modulating valve 10 is set, the size of path when being used for control C chamber and auxiliary chamber gas and circulating mutually.Auxiliary chamber or accumulator air chamber wall are provided with pore 8, can connect air inflation discharging control device and realize filling, exitting.Cylinder wall is provided with oilhole 12, can replenish hydraulic oil by this oilhole.
Working principle of the present invention is as follows:
Piston 2 lower ends of hydro-pneumatic spring shown in Figure 1 are connected with vehicle bridge, oil hydraulic cylinder 1 connects with vehicle body, be fixed to chassis or vehicle body somewhere accumulator 7 and auxiliary chamber 11 visible seam contact pins, vehicle is under the excitation of uneven road surface, vehicle frame and vehicle bridge produce relative movement, and the cylinder barrel of the relative oil hydraulic cylinder of piston is reciprocating.In vehicle travels, when projection on the cartwheel roll or when rolling out pit, vehicle bridge is near vehicle frame, suspension is in compression stroke, the fluid in A chamber is compressed, force fluid to move to two orientation: the one, along with the increase of oil liquid pressure, flow through one-way valve 6 of fluid enters accumulator D chamber with circulation area modulating valve 5, gas volume in further compress energy storage device C chamber and the auxiliary chamber 11, the aperture size of at this moment regulating circulation area modulating valve 10 can change the compressed complexity of gas, namely be presented as the variation that rigidity is wider, while gas flows through circulation area modulating valve 10 and is subjected to certain resistance, namely is presented as to have produced certain damping; The 2nd, along with the motion of piston, the volume in B chamber increases, and fluid flows into the B chamber through the damping hole on the piston 2; Simultaneously the flow through liquid of one-way valve 6 of part flows into the B chambeies by circulation area modulating valve 3, until each cavity pressure balance.In this course owing to damping hole and circulation area modulating valve 3 on one-way valve 6, the piston 2 make 1 chamber be communicated with 2 chambeies simultaneously, the flow velocity of fluid is lower, the fluid damping force that produces is smaller, mainly is compressed by the gas in accumulator 7 and the auxiliary chamber 11 and produces the motion that elastic reaction suppresses piston 2.
When the cartwheel roll lower convexity or when rolling into pit, vehicle bridge is away from vehicle frame, and suspension is in the recovery stroke, and the oil liquid pressure in A chamber reduces, and the fluid in B chamber flows to the A chamber by damping hole, and this moment, one-way valve 6 was in closed condition.Along with the motion of piston 2, the volume that the volume that the A chamber increases reduces greater than the B chamber, at this moment the part fluid in the accumulator 7D chamber flows into the B chamber under gas pressure effect by compression, until each cavity pressure balance.Because one-way valve 6 is in closed condition in restoring stroke, so fluid has only through damping hole on the piston 2 and circulation area modulating valve 3 and flows, and flow velocity is higher, certainly leads to bigger damping force, thereby has suppressed the motion of piston 2, and attenuation vibration rapidly.
Have the fluid of pressure reduction and gas when flowing through damping hole and circulation area modulating valve, produce the energy that damping consumes and be converted into heat, oil liquid temperature is increased, and then be dissipated in the environment by oil hydraulic cylinder outer wall, pipeline outer wall and accumulator outer wall etc. and go.
From principle analysis as can be seen: hydro pneumatic suspension is compression stroke, the damping force that oil hydraulic cylinder produces is smaller, give full play to the elastic reaction of gas in accumulator 7 and the auxiliary chamber 11, be equivalent to the spring action of traditional suspension, and with the aperture size variation of circulation area modulating valve 10, the rigidity of spring changes in a wider context, reduces or keep the natural frequency of vibration of system, simultaneously with certain air damping effect, the decay that can accelerate to vibrate; And in restoring stroke, the damping force of generation is bigger, so that attenuation vibration rapidly, this process is equivalent to the damper effect of traditional suspension.
Because the C chamber of auxiliary chamber 11 and accumulator 7 is communicated with, therefore can charge into or discharge nitrogen by the pore 8 on auxiliary chamber 11 or the accumulator 7 and change the height adjusting that gas gross is realized spring, the adjusting of vehicle body height when realizing vehicle body operating mode being travelled on different loads and different road surfaces etc., strengthen passing ability and the run smoothness of automobile, also can realize the adjusting of hydro-pneumatic spring soil rigidity simultaneously.
Oil hydraulic cylinder 1 wall is provided with oilhole 12, can replenish hydraulic oil by this oilhole, equally also can regulate the soil rigidity of hydro-pneumatic spring thus.
Above-mentioned embodiment is used for the present invention that explains; rather than limit the invention; in the protection domain of spirit of the present invention and claim, all the present invention is taked to be equal to replace or technological scheme that equivalent transformation obtains, all fall into protection scope of the present invention.
Claims (8)
1. variable element hydro-pneumatic spring, comprise oil hydraulic cylinder, accumulator, it is characterized in that oil hydraulic cylinder inside is divided into by piston bar liquid container and no bar liquid container are arranged, and these two cavitys are connected by the damping hole on the piston, accumulator inside is divided into air chamber and liquid container by elastic diaphragm, and two liquid container are communicated with liquid container in the accumulator by pipeline and valve respectively in the oil hydraulic cylinder, also comprises an auxiliary chamber that is connected with air chamber in the accumulator by pipeline and valve.
2. according to the described variable element hydro-pneumatic spring of claim (1), the volume that it is characterized in that auxiliary chamber is not more than 2 times of air chamber maximum volume in the accumulator.
3. according to the described variable element hydro-pneumatic spring of claim (1), it is characterized in that auxiliary chamber can be the sealed cavity of arbitrary shape.
4. according to the described variable element hydro-pneumatic spring of claim (1), it is characterized in that the gas in auxiliary chamber and the accumulator air chamber is inert gas, as nitrogen.
5. according to the described variable element hydro-pneumatic spring of claim (1), it is characterized in that auxiliary chamber or accumulator air chamber wall are provided with a pore, can connect air inflation discharging control device and realize filling, exitting.
6. according to the described variable element hydro-pneumatic spring of claim (1), it is characterized in that cylinder wall is provided with an oilhole, can replenish hydraulic oil by this oilhole.
7. according to the described variable element hydro-pneumatic spring of claim (1), it is characterized in that the valve that arranges in the no bar liquid container and accumulator path in the oil hydraulic cylinder comprises an one-way valve and a circulation area modulating valve, one-way valve is only opened during by no bar liquid container inflow accumulator at fluid.It is a circulation area modulating valve that the valve that arranges in bar liquid container and the accumulator path is arranged.
8. according to the described variable element hydro-pneumatic spring of claim (1), it is characterized in that the valve that arranges in auxiliary chamber and the accumulator path is a circulation area modulating valve.
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| CN2013101169366A CN103195856A (en) | 2013-04-07 | 2013-04-07 | Parameter variable hydro-pneumatic spring |
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| CN2013101169366A CN103195856A (en) | 2013-04-07 | 2013-04-07 | Parameter variable hydro-pneumatic spring |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103863050A (en) * | 2014-03-31 | 2014-06-18 | 常州万安汽车部件科技有限公司 | Vehicle suspension system and motor vehicle |
| CN103895468A (en) * | 2014-03-31 | 2014-07-02 | 常州万安汽车部件科技有限公司 | Vehicle suspension system and motor vehicle |
| CN104552841A (en) * | 2014-12-30 | 2015-04-29 | 北京理工大学 | Volume supplementary type mold locking device adopting equivalent volume replacement |
| CN105401607A (en) * | 2015-12-15 | 2016-03-16 | 福建工程学院 | Balanced type movable arm energy-saving system with variable-area hydraulic energy accumulator |
| CN105421510A (en) * | 2015-12-14 | 2016-03-23 | 福建工程学院 | Movable arm energy-saving system adopting variable-diameter balanced hydraulic cylinder |
| CN106481728A (en) * | 2015-08-31 | 2017-03-08 | 南京英剑机电科技有限公司 | A kind of passive hydraulic type inertia force generating meanss |
| CN107007381A (en) * | 2017-04-14 | 2017-08-04 | 张策 | Artificial limb |
| CN107448682A (en) * | 2017-09-21 | 2017-12-08 | 江苏大力城电气有限公司 | A kind of constant supporting spring hanger of load adjustable |
| CN110195759A (en) * | 2019-07-11 | 2019-09-03 | 海南大学 | A kind of air spring automatic inflatable device of air |
| CN111891248A (en) * | 2020-06-19 | 2020-11-06 | 浙江大学 | Multi-foot walking robot and control method thereof and foot end mechanism with improved structure |
| CN112682451A (en) * | 2020-12-22 | 2021-04-20 | 东风越野车有限公司 | Damping continuously adjustable hydro-pneumatic spring |
| CN113124085A (en) * | 2020-01-14 | 2021-07-16 | 深圳市固胜智能科技有限公司 | Hydraulic system of active shock absorber |
| CN113147298A (en) * | 2021-03-24 | 2021-07-23 | 江苏大学 | Multi-mode double-air-chamber oil-gas ISD suspension and working method thereof |
| CN113324816A (en) * | 2021-06-30 | 2021-08-31 | 上海西邦电气有限公司 | Online monitoring device and method for dissolved gas in transformer oil |
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| CN203297461U (en) * | 2013-04-07 | 2013-11-20 | 南京农业大学 | Hydro-pneumatic spring with variable parameters |
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| CN1246416A (en) * | 1998-09-03 | 2000-03-08 | 南京建筑工程学院 | Vibration damper with oil-gas spring for vehicles |
| CN101349316A (en) * | 2008-07-29 | 2009-01-21 | 郭孔辉 | Sensing load damp-changing or controllable sensing load damp-changing shock mitigation system |
| RU2465495C1 (en) * | 2011-04-25 | 2012-10-27 | Государственное образовательное учреждение высшего профессионального образования Балтийский государственный технический университет "ВОЕНМЕХ" им. Д.Ф. Устинова (БГТУ "ВОЕНМЕХ") | Shock absorber for shock protection systems |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103863050A (en) * | 2014-03-31 | 2014-06-18 | 常州万安汽车部件科技有限公司 | Vehicle suspension system and motor vehicle |
| CN103895468A (en) * | 2014-03-31 | 2014-07-02 | 常州万安汽车部件科技有限公司 | Vehicle suspension system and motor vehicle |
| CN104552841A (en) * | 2014-12-30 | 2015-04-29 | 北京理工大学 | Volume supplementary type mold locking device adopting equivalent volume replacement |
| CN106481728A (en) * | 2015-08-31 | 2017-03-08 | 南京英剑机电科技有限公司 | A kind of passive hydraulic type inertia force generating meanss |
| CN105421510A (en) * | 2015-12-14 | 2016-03-23 | 福建工程学院 | Movable arm energy-saving system adopting variable-diameter balanced hydraulic cylinder |
| CN105401607A (en) * | 2015-12-15 | 2016-03-16 | 福建工程学院 | Balanced type movable arm energy-saving system with variable-area hydraulic energy accumulator |
| CN107007381B (en) * | 2017-04-14 | 2018-11-20 | 东阳市东狮卫浴有限公司 | Artificial limb |
| CN107007381A (en) * | 2017-04-14 | 2017-08-04 | 张策 | Artificial limb |
| CN107448682A (en) * | 2017-09-21 | 2017-12-08 | 江苏大力城电气有限公司 | A kind of constant supporting spring hanger of load adjustable |
| CN110195759A (en) * | 2019-07-11 | 2019-09-03 | 海南大学 | A kind of air spring automatic inflatable device of air |
| CN113124085A (en) * | 2020-01-14 | 2021-07-16 | 深圳市固胜智能科技有限公司 | Hydraulic system of active shock absorber |
| CN111891248A (en) * | 2020-06-19 | 2020-11-06 | 浙江大学 | Multi-foot walking robot and control method thereof and foot end mechanism with improved structure |
| CN111891248B (en) * | 2020-06-19 | 2021-10-29 | 浙江大学 | Multi-foot walking robot and control method thereof and foot end mechanism with improved structure |
| CN112682451A (en) * | 2020-12-22 | 2021-04-20 | 东风越野车有限公司 | Damping continuously adjustable hydro-pneumatic spring |
| CN113147298A (en) * | 2021-03-24 | 2021-07-23 | 江苏大学 | Multi-mode double-air-chamber oil-gas ISD suspension and working method thereof |
| CN113147298B (en) * | 2021-03-24 | 2024-01-05 | 江苏大学 | Multi-mode double-air-chamber oil-gas ISD suspension and working method thereof |
| CN113324816A (en) * | 2021-06-30 | 2021-08-31 | 上海西邦电气有限公司 | Online monitoring device and method for dissolved gas in transformer oil |
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Application publication date: 20130710 |