CN110594336A - Electroless driving frequency adjustable pressure pulsation attenuator - Google Patents
Electroless driving frequency adjustable pressure pulsation attenuator Download PDFInfo
- Publication number
- CN110594336A CN110594336A CN201910972673.6A CN201910972673A CN110594336A CN 110594336 A CN110594336 A CN 110594336A CN 201910972673 A CN201910972673 A CN 201910972673A CN 110594336 A CN110594336 A CN 110594336A
- Authority
- CN
- China
- Prior art keywords
- helmholtz
- frequency
- spring
- end cover
- energy harvesting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000010349 pulsation Effects 0.000 title claims abstract description 37
- 238000003306 harvesting Methods 0.000 claims abstract description 34
- 238000013016 damping Methods 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 239000000919 ceramic Substances 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
-
- 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
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
-
- 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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnets (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses an electroless driving frequency-adjustable pressure pulsation attenuator which comprises a proportional electromagnet, a frequency adjusting end cover, a Helmholtz cavity, a shell, a frequency adjusting damper, a piezoelectric energy harvesting component, a frequency control unit, a capacitor, an energy harvesting control unit and the like. The shell is provided with an inlet and an outlet at two sides, and the middle part is a main channel; a Helmholtz damping hole is formed above the main channel, can be adjusted by a frequency adjusting damper and is connected with the Helmholtz accommodating cavity; the lower part of the main channel is connected with the piezoelectric energy harvesting inlet and the piezoelectric energy harvesting component, the generated electric energy is connected to the frequency control unit through a lead and stored in the capacitor, and then the electromagnet is powered by the energy harvesting control unit. The invention recovers the pressure pulsation to be electric energy, is used for driving the proportional electromagnet, further adjusts the diameter of the Helmholtz damping hole to seek the maximum attenuation of the pressure pulsation, and can be applied to the driving of low-electric-power-consumption elements on occasions such as underwater vehicles, aerospace and the like.
Description
Technical Field
The invention relates to a pressure pulsation attenuator, in particular to a pressure pulsation attenuator with adjustable electroless driving frequency.
Background
Flow pulsation is an inherent property of hydraulic pumps and produces pressure pulsation when fluid encounters loads such as valve ports, elbows, and the like. On one hand, the pressure pulsation can cause pipeline vibration, on the other hand, the pressure pulsation can excite the pipeline to generate fluid noise, and the working quality and the service life of the hydraulic system are seriously influenced. The helmholtz attenuator is a commonly used resonance type resistance pressure pulsation attenuator, the attenuation has strong frequency selectivity, a good attenuation effect for medium-high frequency pressure pulsation above 300Hz, and an optimal attenuation effect for a certain fixed frequency, and pressure pulsation in a pipeline of an actual hydraulic system presents a broadband characteristic, i.e., low, medium and high frequencies exist at the same time, so that the design of the broadband pressure pulsation attenuator is urgently needed.
The pulsation attenuation frequency of the Helmholtz attenuator can be adjusted by changing the diameter of the damping hole of the Helmholtz attenuator, but the adjustment of the process is usually combined with other hydraulic elements (such as a proportional valve, a servo valve, a throttle valve and the like), and the adjustment elements need additional driving, such as the proportional valve and the servo valve need to be driven by external voltage, and the throttle valve needs to be driven manually. In recent years, with the development of new energy and the improvement of energy-saving requirements, flow-induced vibration gradually becomes an important energy source, and the flow-induced vibration piezoelectric energy harvesting technology is also widely researched. The piezoelectric energy harvesting technology using piezoelectric materials is a hot spot of research on energy collection technologies at home and abroad at present, the technology utilizes voltage change caused by deformation of the piezoelectric materials in the flow blocking process to draw energy, and the piezoelectric energy harvesting technology has the advantages of simple structure, no electromagnetic interference, no pollution, no heat generation, easiness in miniaturization and integration and the like. The pressure pulsation can be captured, electric energy is generated, and the pressure pulsation is used for driving pressure pulsation frequency adjustment, so that the pressure pulsation frequency adjusting device has important practical significance.
Disclosure of Invention
The method is characterized in that a piezoelectric material is arranged in a hydraulic system pipeline system in combination with the characteristics of a Helmholtz attenuator aiming at pressure pulsation in a hydraulic system, the piezoelectric material deforms and generates electric energy under the excitation of pulsating pressure, and then the electric energy is utilized to drive a proportional electromagnet for adjusting the diameter of a damping hole of a frequency adjusting damper so as to seek an optimal pressure pulsation attenuation working point.
An electroless-driven frequency-adjustable pressure pulsation attenuator comprises a proportional electromagnet, a push rod, a frequency adjusting end cover, a Helmholtz accommodating cavity, a shell, a frequency adjusting damper, an O-shaped ring, a spring, a lower end cover, a piezoelectric energy harvesting component, a frequency control unit, a capacitor, an energy harvesting control unit and the like. The shell is provided with an inlet and an outlet at two sides, is provided with a blind hole, is provided with a main channel in the middle and is connected with a pipeline system through a bolt. A Helmholtz damping hole is formed above the main channel and is connected with the Helmholtz containing cavity, the Helmholtz containing cavity is connected with the shell in welding, threads, bolts and other modes, the size of the Helmholtz damping hole can be adjusted through the frequency adjusting damper, and the axis directions of the Helmholtz damping hole and the Helmholtz containing cavity are vertical; the lower part of the main channel is connected with the piezoelectric energy harvesting inlet and is used for connecting the piezoelectric energy harvesting assembly to recover pressure pulse energy, convert the pressure pulse energy into electric energy and provide the electric energy for adjusting the frequency adjusting damper.
Furthermore, the left side and the right side of the frequency adjustment damper push a push rod through a proportional electromagnet to perform motion control, a spring is arranged between the left side and the right side to perform positioning, the left spring and the right spring are initially in a compression state, and the rigidity and the compression amount of the left spring and the right spring are the same. One side of the spring is in contact with a spring positioning hole in the frequency adjusting damper, the other side of the spring is in contact with a frequency adjusting end cover, a countersunk groove is formed in the frequency adjusting end cover and used for positioning a guide locking screw and a spring gasket, the frequency adjusting end cover and the spring gasket can be used for fixing the frequency adjusting end cover on the shell and sealing the frequency adjusting end cover by virtue of an O-shaped ring; the proportional electromagnet is connected with the frequency adjusting end cover through an inner hexagon screw, and the end face sealing is carried out by means of an O-shaped ring. The end faces of two sides of the frequency adjusting damper are circular spring positioning openings used for guiding the springs, a circular frequency adjusting control opening and a triangular groove combined form are arranged in the middle of the frequency adjusting damper, and when the push rod moves left and right, the changing area of the triangular groove is smaller than that of the circular frequency adjusting control opening. The pressure equalizing grooves are formed in the periphery of the frequency adjusting damper, so that liquid can enter the pressure equalizing grooves in the frequency adjusting process, the pressure equalizing grooves and the mounting holes in the shell are coaxial, and friction force is reduced.
Further, the piezoelectric energy harvesting component comprises a disc spring, a guide piston, a stet seal ring and piezoelectric ceramics. The disc spring is in a compressed state initially, so that the guide piston and the piezoelectric ceramic are tightly attached to a spigot of the lower end cover, and the lower end cover is connected to the shell through the inner hexagon screw. The guide piston is provided with a circular groove for arranging a Stirling seal ring. The axial direction of the piezoelectric ceramics can adopt a form of stacking a plurality of pieces of piezoelectric ceramics, a plurality of groups can be arranged in the circumferential direction for increasing the electric energy generation amount, and the specific installation layout is related to the power required by the proportion electromagnet and the size of the shell.
Furthermore, the electric energy generated by the piezoelectric ceramics is connected to the frequency control unit through a lead and is stored in a capacitor, and the capacitor is connected with the energy harvesting control unit and is used for supplying power to the proportional electromagnet. The frequency control unit, the capacitor and the energy harvesting control unit are respectively 1 on the left side and the right side of the shell.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention recovers the pressure pulsation energy in the hydraulic system by adopting the piezoelectric energy harvesting technology to be electric energy for driving the proportional electromagnet, thereby realizing the non-electric driving of low-electric power consumption elements of the hydraulic system.
(2) The diameter of a damping hole of the Helmholtz attenuator is changed by adjusting the size of an electric signal input by the proportional electromagnet, and the Helmholtz attenuator can be subjected to feedback adjustment according to the characteristics of pressure pulsation, so that the maximum degree attenuation of the pressure pulsation is realized.
(3) The structure integration level is high, and the pressure pulsation attenuation device can be applied to the pressure pulsation attenuation in the power supply tension occasions of underwater vehicles, aerospace and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic diagram of a frequency tuned damper;
FIG. 4 is a schematic structural diagram of a piezoelectric energy harvesting assembly;
FIG. 5 is an operational view of an attenuator;
the above figures are labeled as: 1. a proportional electromagnet; 2. a socket head cap screw; 3. a push rod; 4. a frequency adjustment end cap; 5. a Helmholtz volume; 6. a housing; 7. locking the screw; 8. a spring washer; 9. a frequency-adjusting damper; 10. an O-shaped ring; 11. a spring; 12. a frequency control unit; 13. a capacitor; 14. an energy harvesting control unit; 15. a lower end cover; 16. a piezoelectric energy harvesting assembly; 6.1, a piezoelectric energy harvesting inlet; 6.2, an inlet; 6.3, an outlet; 6.4, Helmholtz damping holes; 6.5, a main channel; 9.1, a spring positioning opening; 9.2, equalizing the pressure groove; 9.3, a frequency regulation control port; 16.1, a disc spring; 16.2, a guide piston; 16.3, a stet seal ring; 16.4, piezoelectric ceramics.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Fig. 1 and 2 show an embodiment of the present invention, which includes a proportional electromagnet 1, an inner hexagon screw 2, a push rod 3, a frequency adjustment end cap 4, a helmholtz chamber 5, a housing 6, a locking screw 7, a spring washer 8, a frequency adjustment damper 9, an O-ring 10, a spring 11, a frequency control unit 12, a capacitor 13, an energy harvesting control unit 14, a lower end cap 15, and a piezoelectric energy harvesting component 16. The two sides of the shell 6 are provided with an inlet 6.2 and an outlet 6.3, and are provided with blind holes, the middle part is provided with a main channel 6.5, and the shell is connected with a pipeline system through bolts. A Helmholtz damping hole 6.4 is arranged above the main channel 6.5 and is connected with a Helmholtz accommodating cavity 5, the volume of the accommodating cavity is designed according to the actual working condition, the accommodating cavity and the shell 6 can be connected in a welding mode, a thread mode, a bolt mode and the like, the size of the Helmholtz damping hole 6.4 can be adjusted through the frequency adjusting damper 9, and the axial directions of the Helmholtz damping hole and the Helmholtz accommodating cavity are vertical; the lower part of the main channel 6.5 is connected with the piezoelectric energy capturing inlet 6.1 and is used for connecting the piezoelectric energy capturing component 12 to recover pressure pulse energy, convert the pressure pulse energy into electric energy and provide the electric energy for the adjustment of the frequency adjusting damper 9.
The left side and the right side of the frequency adjustment damper 9 push the push rod 3 to perform motion control through the proportional electromagnet 1, the springs 11 are arranged between the left side and the right side to perform positioning, the left spring 11 and the right spring 11 are initially in a compression state, the rigidity and the compression amount are the same, therefore, the frequency adjustment damper 9 is located in the middle of the shell 6 when the frequency adjustment damper is in a non-working state, and the opening degree of the Helmholtz damping hole 6.4 is the largest at the moment. One side of the spring 11 is in contact with a spring positioning hole 9.1 in the frequency adjusting damper 9, the other side of the spring is in contact with the frequency adjusting end cover 4, a countersunk groove is formed in the frequency adjusting end cover 4 and used for positioning the guide locking screw 7 and the spring washer 8, the frequency adjusting end cover 4 can be fixed on the shell 6 through the countersunk groove and the spring washer, and the O-shaped ring 10 is used for sealing; the proportional electromagnet 1 is connected with the frequency adjusting end cover 4 through an inner hexagon screw 2, and the end face sealing is carried out by means of an O-shaped ring 10. As shown in fig. 3, the both sides terminal surface of frequency adjustment attenuator 9 is circular spring location mouth 9.1 for guide spring 11, there is circular and triangular groove combination form's frequency adjustment control mouth 9.3 in the centre, when push rod 3 controlled left and right, the area of the change of triangular groove will be less than circular area of changing, helmholtz damping hole 6.4's size can change by big to little when can be time on the one hand, on the other hand guarantees that helmholtz damping hole 6.4 is by big when diminishing, can present gradual change trend, and change greatly in the twinkling not, thereby reduce the pressure impact when liquid gets into helmholtz and holds chamber 5 and strike. The pressure equalizing grooves 9.2 are formed in the periphery of the frequency adjusting damper 9, so that liquid can enter the pressure equalizing grooves 9.2 in the frequency adjusting process, the pressure equalizing grooves and the mounting holes in the shell 6 are coaxial, and friction force between the frequency adjusting damper 9 and the mounting holes is reduced.
The piezoelectric energy harvesting component 16 is shown in fig. 4 and comprises a disc spring 16.1, a guide piston 16.2, a stet seal ring 16.3 and piezoelectric ceramics 16.4. The disc spring 16.1 is initially in a compressed state, so that the guide piston 16.2 and the piezoelectric ceramic 16.4 are tightly attached to the spigot of the lower end cover 15, and the lower end cover 15 is connected to the shell 6 through the socket head cap screws. The guide piston 16.2 is provided with a circular groove for accommodating a stet seal ring 16.3, which on the one hand prevents the liquid in the housing 6 from flowing out and on the other hand serves to reduce friction. The piezoelectric ceramics 16.4 can adopt a stacking mode of a plurality of pieces of piezoelectric ceramics in the axial direction, a plurality of groups can be arranged in the circumferential direction for increasing the electric energy generation amount, and the specific installation layout is related to the power required by the proportion electromagnet 1, the size of the shell and the like.
The electric energy generated by the piezoelectric ceramics 16.4 is connected to the frequency control unit 12 through a lead and is stored in the capacitor 13, and the capacitor 13 is connected with the energy harvesting control unit 14 and is used for supplying power to the proportional electromagnet 1. The frequency control unit 12, the capacitor 13 and the energy harvesting control unit 14 are respectively 1 on the left and right sides of the housing.
After the liquid enters from the inlet 6.2 of the attenuator, most of the liquid flows into the outlet 6.3 through the main channel 6.5; a part of the liquid can flow into the helmholtz damper through the helmholtz damper orifice 6.4, and due to the resistant damping effect of the helmholtz damper, the pressure pulsation is damped but not completely eliminated; at this time, part of the pulsation fluid which is not attenuated enters the piezoelectric energy capturing assembly 16 from the pressure energy capturing inlet 6.1, and the guide piston 16.2 reciprocates up and down under the action of pressure pulsation, so that the piezoelectric ceramic 16.4 is driven to generate axial deformation and generate electric energy.
Initially, the helmholtz damper orifice 6.4 has the largest opening and is not necessarily at the optimal damping action point, the proportional electromagnet 1 is not powered, and both push rods 3 cannot move. At this time, the piezoelectric energy harvesting component 16 starts to generate electric energy, and the electric energy is stored in the two capacitors 13 through the processes of rectification, amplification and the like in the energy harvesting control unit 14. The pressure signal is detected by the pressure sensor, the frequency control unit 12 controls the current input into one (for example, right) proportional electromagnet 1, the position of the push rod 3 is further controlled, the size of the helmholtz damping hole 6.4 is changed, the optimal attenuation point is reached, the right capacitor is in a discharge state in the process, the left capacitor can be continuously charged, and the left proportional electromagnet is in a non-working state through the frequency control unit, which is shown in fig. 5. If the electric energy of the right capacitor is insufficient, the right proportional electromagnet can be powered off, the right capacitor is charged, the left proportional electromagnet is powered on, and the left capacitor is in a discharging state. So constantly relapse, the electric energy constantly generates, fills in certain electric capacity, and another electric capacity is discharging, gives the power supply of proportion electro-magnet, can guarantee the electric energy enough like this, realizes all adjustable helmholtz attenuator damping hole size at any moment, reaches the purpose of the optimal decay of pressure pulsation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. An electroless driving frequency adjustable pressure pulsation attenuator, characterized in that: the device comprises a proportional electromagnet, a push rod, a frequency adjusting end cover, a Helmholtz accommodating cavity, a shell, a frequency adjusting damper, an O-shaped ring, a spring, a lower end cover, a piezoelectric energy harvesting component, a frequency control unit, a capacitor, an energy harvesting control unit and the like. The shell is provided with an inlet and an outlet at two sides, is provided with a blind hole, is provided with a main channel in the middle and is connected with a pipeline system through a bolt. A Helmholtz damping hole is formed above the main channel and is connected with the Helmholtz containing cavity, the Helmholtz containing cavity is connected with the shell in welding, threads, bolts and other modes, the size of the Helmholtz damping hole can be adjusted through the frequency adjusting damper, and the axis directions of the Helmholtz damping hole and the Helmholtz containing cavity are vertical; the lower part of the main channel is connected with the piezoelectric energy harvesting inlet and is used for connecting the piezoelectric energy harvesting assembly.
2. An electrically-driven frequency-tunable pressure pulsation attenuator according to claim 1, wherein: the left side and the right side of the Helmholtz attenuator push the push rod to perform motion control through the proportional electromagnet, a spring is arranged between the Helmholtz attenuator and the push rod for positioning, the left spring and the right spring are initially in a compression state, and the rigidity is the same as the compression amount. The end surfaces of two sides of the Helmholtz attenuator are circular spring positioning openings used for guiding the springs, a frequency adjusting control opening in a circular and triangular groove combination form is arranged in the middle of the Helmholtz attenuator, and when the push rod moves left and right, the area of the change of the triangular groove is smaller than the area of the circular change. Pressure equalizing grooves are formed around the Helmholtz attenuator.
3. An electrically-driven frequency-tunable pressure pulsation attenuator according to claim 1 or 2, wherein: one side of the spring is in contact with a spring positioning hole in the Helmholtz attenuator, the other side of the spring is in contact with a frequency adjusting end cover, a countersunk groove is formed in the frequency adjusting end cover and used for positioning a guide locking screw and a spring gasket, and the frequency adjusting end cover and the spring gasket can be used for fixing the frequency adjusting end cover on the shell and sealing the frequency adjusting end cover by virtue of an O-shaped ring; the proportional electromagnet is connected with the frequency adjusting end cover through an inner hexagon screw, and the end face sealing is carried out by means of an O-shaped ring.
4. An electrically-driven frequency-tunable pressure pulsation attenuator according to claim 1, wherein: the piezoelectric energy harvesting component comprises a disc spring, a guide piston, a St sealing ring and piezoelectric ceramics. The disc spring is in a compressed state initially, so that the guide piston and the piezoelectric ceramic are tightly attached to a spigot of the lower end cover, and the lower end cover is connected to the shell through the inner hexagon screw. The guide piston is provided with a circular groove for arranging a Stirling seal ring. The axial direction of the piezoelectric ceramics can adopt a form of stacking a plurality of pieces of piezoelectric ceramics, a plurality of groups can be arranged in the circumferential direction for increasing the electric energy generation amount, and the specific installation layout is related to the power required by the proportion electromagnet, the size of the shell and the like.
5. An electrically-driven frequency-tunable pressure pulsation attenuator according to claim 1 or 4, wherein: the electric energy generated by the piezoelectric ceramic is connected to the frequency control unit through a lead and is stored in a capacitor, and the capacitor is connected with the energy harvesting control unit and is used for supplying power to the proportional electromagnet. The frequency control unit, the capacitor and the energy harvesting control unit are respectively 1 on the left side and the right side of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910972673.6A CN110594336B (en) | 2019-10-14 | 2019-10-14 | Pressure pulsation attenuator with adjustable electroless driving frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910972673.6A CN110594336B (en) | 2019-10-14 | 2019-10-14 | Pressure pulsation attenuator with adjustable electroless driving frequency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110594336A true CN110594336A (en) | 2019-12-20 |
| CN110594336B CN110594336B (en) | 2024-04-30 |
Family
ID=68867073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910972673.6A Active CN110594336B (en) | 2019-10-14 | 2019-10-14 | Pressure pulsation attenuator with adjustable electroless driving frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110594336B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111739500A (en) * | 2020-06-01 | 2020-10-02 | 南京航空航天大学 | Underwater broadband sound absorption structure of perforated sandwich plate modified by damping layer |
| CN114922884A (en) * | 2022-05-06 | 2022-08-19 | 燕山大学 | Broadband pressure pulsation attenuator for hydraulic pipeline and working process thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050172620A1 (en) * | 2002-05-14 | 2005-08-11 | Michael Zimpfer | Hydraulic system comprising pressure-controlled damping means |
| CN102345702A (en) * | 2011-09-18 | 2012-02-08 | 浙江师范大学 | Piezoelectric stacking type self-energy supply hydraulic buffer |
| CN103016599A (en) * | 2012-12-13 | 2013-04-03 | 浙江师范大学 | Integrated type self-powered hydraulic damper |
| CN103016597A (en) * | 2012-12-13 | 2013-04-03 | 浙江师范大学 | Self-powered damper based on vibration energy recovery |
| CN104578912A (en) * | 2015-02-02 | 2015-04-29 | 张文明 | Piezoelectric energy harvesting and active vibration reduction integrated set |
| CN107740903A (en) * | 2017-10-10 | 2018-02-27 | 吉林大学 | Liquid-filling pipe piezoelectricity liquid hinders energy accumulator |
| CN207647725U (en) * | 2017-12-15 | 2018-07-24 | 西安交通大学 | A kind of adjustable multi-cavity Helmholtz resonator of resonant frequency |
| CN209142407U (en) * | 2018-09-11 | 2019-07-23 | 长春工业大学 | It is a kind of based on magnetorheological second level vibration isolation holder |
| CN211343839U (en) * | 2019-10-14 | 2020-08-25 | 青岛科技大学 | Electroless driving frequency adjustable pressure pulsation attenuator |
-
2019
- 2019-10-14 CN CN201910972673.6A patent/CN110594336B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050172620A1 (en) * | 2002-05-14 | 2005-08-11 | Michael Zimpfer | Hydraulic system comprising pressure-controlled damping means |
| CN102345702A (en) * | 2011-09-18 | 2012-02-08 | 浙江师范大学 | Piezoelectric stacking type self-energy supply hydraulic buffer |
| CN103016599A (en) * | 2012-12-13 | 2013-04-03 | 浙江师范大学 | Integrated type self-powered hydraulic damper |
| CN103016597A (en) * | 2012-12-13 | 2013-04-03 | 浙江师范大学 | Self-powered damper based on vibration energy recovery |
| CN104578912A (en) * | 2015-02-02 | 2015-04-29 | 张文明 | Piezoelectric energy harvesting and active vibration reduction integrated set |
| CN107740903A (en) * | 2017-10-10 | 2018-02-27 | 吉林大学 | Liquid-filling pipe piezoelectricity liquid hinders energy accumulator |
| CN207647725U (en) * | 2017-12-15 | 2018-07-24 | 西安交通大学 | A kind of adjustable multi-cavity Helmholtz resonator of resonant frequency |
| CN209142407U (en) * | 2018-09-11 | 2019-07-23 | 长春工业大学 | It is a kind of based on magnetorheological second level vibration isolation holder |
| CN211343839U (en) * | 2019-10-14 | 2020-08-25 | 青岛科技大学 | Electroless driving frequency adjustable pressure pulsation attenuator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111739500A (en) * | 2020-06-01 | 2020-10-02 | 南京航空航天大学 | Underwater broadband sound absorption structure of perforated sandwich plate modified by damping layer |
| CN111739500B (en) * | 2020-06-01 | 2023-07-25 | 南京航空航天大学 | Perforated sandwich plate underwater broadband sound absorption structure decorated by damping layer |
| CN114922884A (en) * | 2022-05-06 | 2022-08-19 | 燕山大学 | Broadband pressure pulsation attenuator for hydraulic pipeline and working process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110594336B (en) | 2024-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211343839U (en) | Electroless driving frequency adjustable pressure pulsation attenuator | |
| CN110594336A (en) | Electroless driving frequency adjustable pressure pulsation attenuator | |
| CN108612711B (en) | Vibration damping device for hydraulic pipeline system | |
| CN108506403B (en) | Large-scale hydraulic damper | |
| CN109307041B (en) | Semi-active control hydraulic suspension based on air spring | |
| CN110056737A (en) | A kind of honeycomb rubber lining formula pressure fluctuation attenuator | |
| CN108385854A (en) | A kind of intelligence pressure adjustable type fluid linking damper | |
| CN208668660U (en) | A kind of intelligence pressure adjustable type fluid linking damper | |
| CN114458718B (en) | Anti-settling magneto-rheological shock absorber for high-pressure hydraulic pipeline system and working process of shock absorber | |
| CN110107765B (en) | Self-adaptive compound pressure pulsation attenuator | |
| CN210069241U (en) | Self-adaptive compound pressure pulsation attenuator | |
| CN111102155B (en) | Reciprocating linear double-cylinder hydraulic pump | |
| CN111550378A (en) | Plunger metering pump with buffer device and back pressure device | |
| CN103334741A (en) | Minor-diameter pulse generating device | |
| CN212360077U (en) | Vibration-damping noise-reducing electromagnetic pump | |
| CN110549156B (en) | Sucker type magnetorheological damping system and method | |
| CN107940158A (en) | Fluid filter and its system | |
| CN210422908U (en) | Water-cooled motor type four-plunger pump | |
| CN104235987B (en) | Air conditioner system and vehicle comprising same | |
| CN212656940U (en) | Plunger metering pump with buffer device and back pressure device | |
| CN100507330C (en) | High volume gas pressure regulating valve | |
| CN211344213U (en) | Built-in piezoelectricity energy harvesting subassembly water pressure choke valve | |
| CN110259767B (en) | Low-frequency broadband hydraulic pulsating pressure attenuator | |
| CN110617364A (en) | Built-in piezoelectricity energy harvesting subassembly water pressure choke valve | |
| CN114278527B (en) | Hydraulic pump outlet pressure pulsation damping device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |