CN202228583U - Piezo-stack type self-energized adjustable hydraulic damper - Google Patents
Piezo-stack type self-energized adjustable hydraulic damper Download PDFInfo
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- CN202228583U CN202228583U CN201120348599XU CN201120348599U CN202228583U CN 202228583 U CN202228583 U CN 202228583U CN 201120348599X U CN201120348599X U CN 201120348599XU CN 201120348599 U CN201120348599 U CN 201120348599U CN 202228583 U CN202228583 U CN 202228583U
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- 239000012530 fluid Substances 0.000 claims abstract description 18
- 230000005611 electricity Effects 0.000 claims description 21
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- 238000000034 method Methods 0.000 abstract description 4
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- 239000007788 liquid Substances 0.000 description 2
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- 238000010248 power generation Methods 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
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Abstract
The utility model relates to a piezo-stack type self-energized adjustable hydraulic damper and belongs to the field of hydraulic dampers. A hydraulic cylinder is installed on a main body through screws and the main body is installed on a pedestal; a hydraulic cylinder piston is installed inside a cylinder body; an upper cavity of the cylinder body is communicated with a group of pipelines on the main body through a pipe joint and a lower cavity of the cylinder body is communicated with another group of pipelines on the body; the two groups of the pipelines on the main body are communicated with annular grooves in a damping control valve core respectively; one group of the pipelines on the main body is connected with an accumulator; and the two groups of the pipelines on the main body are communicated with fluid cavities of two sets of generating devices respectively. The piezo-stack type self-energized adjustable hydraulic damper requires no external energy supply and additional peripheral equipment such as a sensor, a motor and a hydraulic pump, realizes automatic damping control according to environmental vibration conditions, and is characterized by strong environmental suitability, simple control method, simple structure, small volume and high integration level.
Description
Technical field
The utility model belongs to antivibration area, relates to a kind of hydraulic damper, is specifically related to a kind of hydraulic damper that generates electricity, supplies power and carry out the damping adjusting based on the piezoelectric stack transducer, is applicable to the vibration suppression and the elimination of the traffic tool, machinery etc.
Background technique
Hydraulic damper is widely used in the vibration control field of the traffic tool, machinery etc.Early stage passive type hydraulic damper is simple in structure, cost is low, technology is ripe; But because of damping non-adjustable; The adaptability of its effectiveness in vibration suppression and environment is relatively poor; Be inappropriate for some and require vibration control effect occasion preferably, as motor car engine and vehicle frame suspend, Large-Scale Precision Instrument and Equipment vibration damping etc.Therefore; People have proposed active, semi-active type adjustable hydraulic damper; The active adjustable damper that promptly utilizes motor-driven hydraulic pumps power to be provided and to be controlled by electromagnetic switch/overflow/reduction valve (or a plurality of one-way valve) is like Chinese invention patent CN1367328A, CN101392809A etc.Compare in the non-adjustable hydraulic damper of passive type, the control of active adjustable hydraulic damper is effective, the adaptive capacity of vibration environment is strong, succeed to use at aspects such as automobile active engine mounts; But existing active hydraulic damping regulation technology also comes with some shortcomings, as: need 1. that bigger pumping plant drives, a plurality of solenoid valve jointly controls, 2. need sensor to carry out the detection of vibrational state, the external energy supply that 3. need continue.It is thus clear that the systems bulky of existing active adjustable hydraulic damper, connection and control are complicated, reliability is lower, on using, have certain narrow limitation.
Summary of the invention
For solving the problems referred to above of existing hydraulic damping damping technology; The utility model proposes a kind of hydraulic damper that utilizes the generating of piezoelectric stack transducer, supplies power and carry out the damping adjusting; The mechanical energy that promptly will vibrate main body through the coupling of piezoelectric stack and hydraulic fluid converts electric energy to; The voltage signal that is generated is (function of sensor) except that directly being used to the vibrational state testing signal, after conversion treatment, also is used to the status adjustment of orifice valve.
The technological scheme that the utility model is taked is, hydraulic cylinder is installed on the main body through screw, and said main body is installed on the base through screw; Said hydraulic cylinder piston is installed on cylinder interior and said cylinder body is separated into cylinder body epicoele and cylinder body cavity of resorption, and said cylinder body epicoele is communicated with one group of pipeline on the said main body through pipe joint, and another on said cylinder body cavity of resorption and the main body organized pipeline and be communicated with; Two groups of pipelines on the said main body respectively with the damping regulating spool on annular groove be communicated with; One group of pipeline on the said main body also links to each other with accumulator; Two groups of pipelines on the said main body also communicate with the fluid chamber of two groups of electricity generating devices respectively, and described electricity generating device is connected with ECU through lead respectively with the damping modulating valve.
The said electricity generating device of the utility model is made up of with piezoelectric stack the fluid chamber that places body interior, belleville spring one, generating chamber piston and generating, and said belleville spring one, generating chamber piston, generating are crimped in the main body through base with piezoelectric stack;
The said damping modulating valve of the utility model is made up of with piezoelectric stack spool, belleville spring two and driving, and said spool, belleville spring two, driving are crimped in the integrated package through base with piezoelectric stack, and said spool is provided with circular groove.
The said ECU of the utility model comprises rectifier bridge, cymoscope, comparator, reaches one group of control switch formation, and its function is to carry out energy recovery and the control of orifice valve switch.
Under the vibration damper off working state, two cavitys of oil hydraulic cylinder and all ducted hydrodynamic pressures equate, are the set pressure of accumulator, and generating is with piezoelectric stack preloading power, and the piezoelectric stack of valve control does not receive the external force effect and makes spool be in normally open.After getting into steady operation, moving up and down of hydraulic cylinder piston changes system fluid pressure (the piezoelectric stack stress is used in two groups of generatings), thereby can convert the pressure of fluid to electric energy.The electric energy that is generated is through further being used to control the damping modulating valve after the conversion treatment, and the motion state of damping modulating valve is confirmed by the size and the waveform of institute's formation voltage.
The advantage of the utility model is: 1. need not extraneous energy supply, reliability height, can not influence the control effect because of energy shortage; 2. need not extra sensor, environmental suitability is strong, controlling method is simple, is that voltage signal is adjusted damping automatically according to the vibration situation; 3. simple in structure, volume is little, level of integration is high, good airproof performance, need not peripheral unit such as motor, pump, solenoid valve; 4. do not produce/do not receive electromagnetic interference, more be applicable to the environment of high magnetic fields, intense radiation.Therefore, the piezoelectric stack formula self energizing adjustable hydraulic damper of the utility model also is suitable for microsystem and tele-control systems such as Aero-Space, intelligence structure except being applicable to the large-scale traffic tool and machine tool.
Description of drawings
Fig. 1 is the structure and the generalized section thereof of a preferred embodiment of the utility model;
Fig. 2 is the A-A sectional view of preferred embodiment Fig. 1 of the utility model;
Fig. 3 (a) is that preferred embodiment generating of the utility model is with piezoelectric stack 5a3 output voltage waveform;
Fig. 3 (b) is that preferred embodiment generating of the utility model is with piezoelectric stack 5b3 output voltage waveform;
Fig. 3 (c) is the generating voltage oscillogram after preferred embodiment rectification of the utility model;
Fig. 3 (d) is that preferred embodiment of the utility model drives with piezoelectric stack 63 power supply voltage oscillograms;
Fig. 3 (e) is the displacement diagram figure of a preferred embodiment damping of the utility model spool 62;
Fig. 4 (a) is the preceding damping valve opening aperture figure of power supply in preferred embodiment of the utility model;
Fig. 4 (b) is power supply back damping valve opening aperture figure in preferred embodiment of the utility model;
Fig. 5 is the ECU circuit theory diagrams of a preferred embodiment of the utility model.
Embodiment
The said electricity generating device of the utility model is made up of with piezoelectric stack the fluid chamber that places body interior, belleville spring one, generating chamber piston and generating, and said belleville spring, generating chamber piston, generating are crimped in the main body through base with piezoelectric stack;
The said damping modulating valve of the utility model is made up of with piezoelectric stack spool, belleville spring and driving, and said spool, belleville spring, driving are crimped in the main body through base with piezoelectric stack, and said spool is provided with circular groove.
The said ECU of the utility model mainly comprises rectifier bridge, cymoscope, comparator, reaches one group of control switch formation, and its function is to carry out energy recovery and the control of orifice valve switch.
Like Fig. 1, shown in Figure 2, constitute by hydraulic cylinder 1, hydraulic cylinder piston 2, pipe joint 3, main body 4, base 7, ECU 8, accumulator 9 that electricity generating device 5a and electricity generating device 5b and damping modulating valve 6 be installed; Said electricity generating device 5a is by placing main body 4 inner belleville spring one 5a1, generating chamber piston 5a2 and generatings to constitute with piezoelectric stack 5a3 and fluid chamber 5a4; Said electricity generating device 5b is by placing main body 4 inner belleville spring 5b1, generating chamber piston 5b2 and generatings to constitute with piezoelectric stack 5b3 and fluid chamber 5b4; Said damping modulating valve 6 is made up of with piezoelectric stack 63 belleville spring 2 61, spool 62 and driving; Said cylinder body 1 is installed on the main body 4 through screw, and said main body 4 is installed on the base 7 through screw; Said piston 2 is installed on cylinder body 1 inside and said cylinder body 1 is separated into cylinder body epicoele C1 and cylinder body cavity of resorption C2; Said cylinder body epicoele C1 is communicated with pipeline 42a and 41a on the said main body 4 through pipe joint 3, said cylinder body cavity of resorption C2 successively with main body 4 on pipeline 40,41b, 42b and accumulator 9 be communicated with; Said pipeline 42a and 42b respectively with spool 62 on annular groove be communicated with; Belleville spring one 5a1 of said electricity generating device 5a, piston 5a2, generating are crimped in the main body 4 through base 7 with piezoelectric stack 5a3; Belleville spring one 5b1 of said electricity generating device 5b, piston 5b2, generating are crimped in the main body 4 through base 7 with piezoelectric stack 5b3; The belleville spring 2 61 of said damping modulating valve 6, spool 62, driving are crimped in the main body 4 through base 7 with piezoelectric stack 63; Described model utility electricity is connected with ECU 8 through lead respectively with 63 with piezoelectric stack 5a3,5b3 and driving.
As shown in Figure 1; Under the damper off working state; Hydrodynamic pressure in all pipelines on cylinder body epicoele C1, cylinder body cavity of resorption C2 and the main body 4 equates, is the set pressure of accumulator 9, and model utility is with piezoelectric stack 5a3 and 5b3 preloading power; Drive and do not receive fluid pressure action with piezoelectric stack 63, spool 62 is in normally open.After damper regulator got into steady operation, hydraulic cylinder piston 2 moved up and down with the vibration main body, and then intrasystem hydrodynamic pressure and generating are changed with piezoelectric stack 5a3 and 5b3 stress, thereby can convert the pressure of fluid to electric energy.Said generating flows to ECU 8 with the electric energy that piezoelectric stack 5a3 and 5b3 generate through lead; Again through further flowing to driving with piezoelectric stack 63 after the conversion treatment; Driving is extended by the voltage effect with piezoelectric stack 63, thereby reduces aperture, the increase damping force of damping hole.Especially, the motion state of damping spool 62 is directly controlled with piezoelectric stack 5a3 and 5b3 institute formation voltage by generating.
Like Fig. 1, shown in Figure 2; When steady operation; When hydraulic cylinder piston 2 is moved upward by the external force effect; Hydrodynamic pressure in the cylinder body epicoele C1 raises, the hydrodynamic pressure of cylinder body cavity of resorption C2 reduces, pipeline 42a, fluid chamber 5a4 and pipeline 41a that the liquid in the cylinder body epicoele C1 gets on the main body 4 through pipe joint 3, and pipeline 42b gets into cylinder body cavity of resorption C2 on the annular groove on the spool 62, main body 4 again; Simultaneously, the liquid in the accumulator 9 also gets into cylinder body cavity of resorption C2 through pipeline 42b; Because pipeline 41a, 42a and fluid chamber 5a4 fluid pressure raise; The hydrodynamic pressure of pipeline 41b, 42b and fluid chamber 5b4 reduces; Generating with piezoelectric stack 5a3 be compressed, piezoelectric stack 5b3 the effect of self elastic force down answer be out of shape, the voltage waveform that it generated is shown in Fig. 3 (a), 3 (b); When hydraulic cylinder piston 2 moved downward, power generation process was similar, and only the voltage waveform phase place of piezoelectric stack 5a3 and 5b3 output changes.
Shown in Fig. 1, Fig. 4 (a), Fig. 4 (b), the driving piezoelectric stack 63 of damping modulating valve 6 powers on, and extend the back, 62 motions of promotion spool, thereby effective flow area of said valve is reduced, and plays the effect that increases damping; The contrast that forward and backward spool 62 damping hole apertures change that powers on of said piezoelectric stack 63 is as shown in Figure 4.
Fig. 3 (a) ~ Fig. 3 (e) be send out among the utility model embodiment/power supply voltage waveform and spool travel concern comparison diagram;
Voltage waveform shown in Fig. 3 (a), 3 (b) has directly reflected the vibration situation of hydraulic piston 1 (promptly vibrating main body), and therefore generating also has the function of vibration detecting sensor with piezoelectric stack 5a3 or 5b3.Increasing damping with vibration main body (piston 2) when leaving the equilibrium position is purpose; The control principle of the utility model ECU 8 is as shown in Figure 5, comprises that mainly rectifier bridge 81 and 85, extreme value cymoscope 82, zero point cymoscope 83, comparator 84, interlock power switch k1 and discharge switch k2 constitute.Be to improve power supply capacity, the electricity generating device 5a of the utility model and 5b all comprise at least one pair of identical generating with piezoelectric stack 5a3 and 5b3, and the employing parallel way connection when being a plurality of of said piezoelectric stack.Through rectifier bridge 81 and rectifier bridge 85 rectifications, the voltage waveform after the rectification is identical, shown in Fig. 3 (c) respectively for the voltage that electricity generating device 5a and 5b produce.The voltage of electricity generating device 5a output is exported to cymoscope 82 and 83 and is carried out the voltage waveform detection after rectification, comparator 83 carries out the testing result contrast, again according to the comparing result control switch k1 of comparator 83 and the break-make of k2.
Power switch k1 connects during original state; Generate electricity with piezoelectric stack 5a3,5b3 and driving with piezoelectric stack 63 parallel connections; The voltage
that said generating produces with piezoelectric stack 5a3,5b3 is applied directly to and drives with piezoelectric stack 63 two ends (
), moves on the spool 62 and makes that the damping hole flow area reduces, the damping increase; As
when reaching extreme value; Power switch k1 breaks off, discharge switch k2 connects; Drive with piezoelectric stack 63 voltage
and reduce to zero; Said driving is shortened (restore nature length) with piezoelectric stack 63 under the effect of self elastic force, spool 62 moves down under the belleville spring effect and makes that the damping hole aperture increases, deattenuation; Simultaneously;
reduces rapidly; Power switch k1 connected when
reduced to for zero (being equivalent to original state), discharge switch k2 breaks off, and drove with power on once more elongation and make the damping increase of piezoelectric stack 63; According to generating with the variation of piezoelectric stack voltage waveform, alternately connecting and disconnecting of switch k1 and k2, thus realized the automatic regulatory function of damping.Drive displacement diagram with the power supply voltage of piezoelectric stack 63 and spool 62 shown in Fig. 3 (d) and Fig. 3 (e).
According to the principle that overall charge amount before and after each piezoelectric stack parallel connection equates, the power supply voltage of piezoelectric stack 63 is:
, wherein,
Be the output voltage of piezoelectric stack 5a3 and 5b3,
For the electric capacity of piezoelectric stack 63,
Be the electric capacity of piezoelectric stack 5a3 and 5b3,
nQuantity for piezoelectric stack 5a3 and piezoelectric stack 5b3.
Claims (3)
1. a piezoelectric stack formula self energizing adjustable hydraulic damper is characterized in that hydraulic cylinder is installed on the main body through screw, and said main body is installed on the base through screw; Said hydraulic cylinder piston is installed on cylinder interior and said cylinder body is separated into cylinder body epicoele and cylinder body cavity of resorption, and said cylinder body epicoele is communicated with one group of pipeline on the said main body through pipe joint, and another on said cylinder body cavity of resorption and the main body organized pipeline and be communicated with; Two groups of pipelines on the said main body respectively with the damping regulating spool on annular groove be communicated with; One group of pipeline on the said main body also links to each other with accumulator; Two groups of pipelines on the said main body also communicate with the fluid chamber of two groups of electricity generating devices respectively, and described electricity generating device is connected with ECU through lead respectively with orifice valve.
2. piezoelectric stack formula self energizing adjustable hydraulic damper according to claim 1 is characterized in that, said electricity generating device is made up of with piezoelectric stack the fluid chamber that places body interior, belleville spring one, generating chamber piston and generating; Said belleville spring one, generating chamber piston, generating are crimped in the main body through base with piezoelectric stack.
3. piezoelectric stack formula self energizing adjustable hydraulic damper according to claim 1; It is characterized in that; Said damping modulating valve is made up of with piezoelectric stack spool, belleville spring two and driving; Said spool, belleville spring two, driving are crimped in the main body through base with piezoelectric stack, and said spool is provided with circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120348599XU CN202228583U (en) | 2011-09-18 | 2011-09-18 | Piezo-stack type self-energized adjustable hydraulic damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120348599XU CN202228583U (en) | 2011-09-18 | 2011-09-18 | Piezo-stack type self-energized adjustable hydraulic damper |
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| Publication Number | Publication Date |
|---|---|
| CN202228583U true CN202228583U (en) | 2012-05-23 |
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| CN201120348599XU Expired - Lifetime CN202228583U (en) | 2011-09-18 | 2011-09-18 | Piezo-stack type self-energized adjustable hydraulic damper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359533A (en) * | 2011-09-18 | 2012-02-22 | 浙江师范大学 | Piezoelectric stack type self-energized adjustable hydraulic damper |
| CN106018724A (en) * | 2016-06-15 | 2016-10-12 | 浙江师范大学 | River monitoring device based on piezoelectric stacks |
-
2011
- 2011-09-18 CN CN201120348599XU patent/CN202228583U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359533A (en) * | 2011-09-18 | 2012-02-22 | 浙江师范大学 | Piezoelectric stack type self-energized adjustable hydraulic damper |
| CN102359533B (en) * | 2011-09-18 | 2013-01-02 | 浙江师范大学 | Piezoelectric stack type self-energized adjustable hydraulic damper |
| CN106018724A (en) * | 2016-06-15 | 2016-10-12 | 浙江师范大学 | River monitoring device based on piezoelectric stacks |
| CN106018724B (en) * | 2016-06-15 | 2018-03-09 | 浙江师范大学 | A kind of river monitoring device based on piezoelectric stack |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120523 Effective date of abandoning: 20130306 |
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| RGAV | Abandon patent right to avoid regrant |