CN100352563C - Compound vibration unit and method - Google Patents
Compound vibration unit and method Download PDFInfo
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- CN100352563C CN100352563C CNB2005100426024A CN200510042602A CN100352563C CN 100352563 C CN100352563 C CN 100352563C CN B2005100426024 A CNB2005100426024 A CN B2005100426024A CN 200510042602 A CN200510042602 A CN 200510042602A CN 100352563 C CN100352563 C CN 100352563C
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- oil pocket
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- resonance
- pressure
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Abstract
The present invention discloses a compound vibration unit and a vibration method thereof, which aims to overcome the influence of the inertial force of vibration components on vibration processes. The present invention is characterized in that resonant oil cavities A (10) and B (11) which form a compound oil cylinder (8) are respectively arranged on both sides of force-applying oil cavities A (5) and B (6) of a force-applying oil cylinder (2); a partition board (9) arranged on the center of the compound oil cylinder (8) divides the compound oil cylinder (8) into two parts; a piston rod (3) is connected with pistons (4-1) and (4-2), and the partition board (9) and the pistons (4-1) and (4-2) divide the compound oil cylinder (8) into four oil cavities. Under the condition that an energy accumulator is connected, the compound vibration forms two symmetrical atmospheric and hydraulic spring structures so as to change the resonance frequency of a vibration system and raise systematical vibration amplitude and output force by utilizing resonance effect; under the same condition, the systematical vibration amplitude A is increased to 0.09mm from 0.03mm, namely that the systematical vibration amplitude is raised by two times.
Description
Technical field
The present invention relates to a kind of complex vibration device, also relate to the method for oscillating of this complex vibration device, can be used for vibration experiment table or linear friction welding machine hydraulic vibrating system.
Background technology
With reference to Fig. 1, existing hydraulic vibrating system is by the application of force oil pocket A5 on the servo valve 1 control application of force oil cylinder 2, the oil pressure of application of force oil pocket B6, thereby the motion of control piston 4 drives the vibration of workpiece 7.When the quality of vibrating mass such as workpiece 7 and piston 4 bigger, when vibration acceleration is higher, the hydraulic-driven power overwhelming majority that application of force oil pocket A5 and application of force oil pocket B6 pressure reduction produce consumes and is overcoming on the inertia force of vibrating mass, and the amplitude of exporting when making high frequency is very little, and the efficient of vibrational system is low.
Summary of the invention
The technical problem that solves: in order to overcome of the influence of vibrating mass inertia force to vibration processes, the invention provides a kind of resonance oil pocket, under the situation that connects accumulator, form the gas-liquid pressing spring structure of two symmetries, to change the vibrational system resonant frequency, make it approaching, utilize resonance effect to reach the purpose of raising system amplitude and power output with operating frequency.
The present invention also provides the method for oscillating of this resonance oil pocket.
Technical scheme: a kind of complex vibration device, comprise application of force oil cylinder 2 and servo valve 1, it is characterized in that: application of force oil pocket A5 and application of force oil pocket B6 both sides at application of force oil cylinder 2 are provided with resonance oil pocket A10 and resonance oil pocket B11 composition composite oil cylinder 8 respectively, the dividing plate 9 at composite oil cylinder 8 centers is divided into two composite oil cylinder 8, be connected with two piston 4-1 on the piston rod 3,4-2, dividing plate 9, two piston 4-1,4-2 is divided into four oil pockets with composite oil cylinder 8, be application of force oil pocket A5, application of force oil pocket B6, resonance oil pocket A10 and resonance oil pocket B11, application of force oil pocket A5 communicates with the A chamber of servo valve 1, application of force oil pocket B6 communicates with the B chamber of servo valve 1, and resonance oil pocket A10 links to each other with accumulator B13 with accumulator A12 respectively with resonance oil pocket B11.
A kind of method for oscillating of above-mentioned complex vibration device is characterized in that following step:
1) by oil pump 17, pressure-reducing valve 23,2/2-way reversal valve B25,2/2-way reversal valve A24, give resonance oil pocket A10 and resonance oil pocket B11 pressurising respectively, and give accumulator A12 and accumulator B13 pressurising respectively by two-bit triplet reversal valve A27, two-bit triplet reversal valve B28;
2) after resonance oil pocket and accumulator group pressure reach setting value, disconnect 2/2-way reversal valve A24 and 2/2-way reversal valve B25;
3) pass through the pressure that servo valve 1 is controlled application of force oil pocket A5 and application of force oil pocket B6, piston rod 3 and workpiece 7 vibrations, pressure rising as servo valve 1 control application of force oil pocket A5, when the pressure of application of force oil pocket B6 reduces, piston rod 3 rises, the pressure of fluid increases among the resonance oil pocket A10, and the pressure of fluid reduces among the resonance oil pocket B11, and piston 3 is subjected to a downward restoring force;
When the pressure reduction of servo valve 1 control application of force oil pocket A5, when the pressure of application of force oil pocket B6 raise, piston rod 3 descended, and the pressure of fluid reduces among the resonance oil pocket A10, and the pressure of fluid increases among the resonance oil pocket B11, and piston 3 is subjected to a restoring force that makes progress.
The present invention's advantage compared to existing technology is: owing to adopted the complex vibration device, under identical hydraulic-driven power, can improve the amplitude of system vibration.
Oil cylinder piston sectional area A=0.01m
2, oil chamber volume V
t=0.005m
3, hydraulic cylinder leadage coefficient c
=8.5 * 10
-6m
3Pa/s, piston and load gross mass M=50kg, liquid volume coefficient of elasticity β=7 * 10
4MPa adopts MOOG D792S80 servo valve, system pressure P=30MPa, flow Q=800l/min, hydraulic spring grease cup coefficient of elasticity k
h=1 * 10
8N/m, under resonant frequency H=193Hz, amplitude A=0.09mm; And under the same terms, the amplitude A of prior art has only 0.03mm, and amplitude has improved twice.
Description of drawings
Fig. 1 is the vibrational system schematic diagram, is prior art figure
Fig. 2 is the embodiment of the invention one schematic diagram
Fig. 3 is the embodiment of the invention two schematic diagrames
Fig. 4 is the present invention's schematic diagram in vibrational system
Among the figure, 1-servo valve, 2-application of force oil cylinder, the 3-piston rod, 4-piston, 5-application of force oil pocket A, 6-application of force oil pocket B, 7-workpiece, 8-composite oil cylinder, the 9-dividing plate, 10-resonance oil pocket A, 11-resonance oil pocket B, 12-accumulator A, 13-accumulator B, 14-resonance oil cylinder, the 15-fuel tank, 16-oil suction filter, 17-oil pump, the 18-motor, 19-high pressure filter, 20-2/2-way magnetic valve, the 21-overflow valve, 22-accumulator, 23-pressure-reducing valve, 24-2/2-way magnetic valve A, 25-2/2-way magnetic valve B, 26-Pressure gauge, 27-two-bit triplet reversal valve A, 28-two-bit triplet reversal valve B.
The specific embodiment
Embodiment 1: with reference to Fig. 2, increase resonance oil pocket A10 and resonance oil pocket B11 in the application of force oil pocket A5 and the application of force oil pocket B6 both sides of application of force oil cylinder 2, form composite oil cylinder 8 jointly, there is dividing plate 9 at its center, is connected with two pistons on the piston rod 3.Dividing plate 9 and two pistons are divided into four oil pockets with composite oil cylinder 8, i.e. application of force oil pocket A5, application of force oil pocket B6, resonance oil pocket A10 and resonance oil pocket B11.Application of force oil pocket A5 communicates with the A chamber of servo valve 1, and application of force oil pocket B6 communicates with the B chamber of servo valve 1, by the pressure of servo valve 1 control application of force oil pocket A5 and application of force oil pocket B6.Resonance oil pocket A10 links to each other with accumulator B13 with accumulator A12 respectively with resonance oil pocket B11.Before the vibration,, make resonance oil pocket A10 and resonance oil pocket B11 reach the accumulator A12 and the accumulator B13 internal pressure that link to each other earlier and be elevated to setting value according to the vibration frequency needs.When the pressure rising of servo valve 1 control application of force oil pocket A5, when the pressure of application of force oil pocket B6 reduced, piston was moved to the left.Because liquid has compressibility with gas in resonance oil pocket and the accumulator, so the pressure of fluid increase among the resonance oil pocket A10, the pressure of fluid reduces among the resonance oil pocket B11, makes piston be subjected to a restoring force to the right after acting on the piston.This restoring force tries hard to make piston to return to the equilbrium position.Otherwise still.This mechanism is similar to the effect of spring, so be referred to as the gas-liquid pressing spring.By regulating oil pressure in accumulator volume and the resonance oil pocket, can change the restoring force size, the resonant frequency of system is changed.When resonant frequency equated with operating frequency, the gas-liquid pressing spring can be offset The Effect of Inertia Force fully, made hydraulic-driven power be converted to output drive strength fully.Under the effect of identical hydraulic-driven power, when frequency is identical, the amplitude maximum of generation.Under the identical condition of system vibration frequency, amplitude, the thrust minimum that the drive system vibration is required, most effective.So claim that the present invention is a resonant vibration.Therefore, as long as by regulating the coefficient of elasticity of gas-liquid pressing spring, the regulating system resonant frequency is identical or close with required operating frequency, just can realize high frequency, significantly vibration.
Embodiment 2: with reference to Fig. 3, be the another kind of connected mode of resonance oil pocket.Resonance oil cylinder 14 separates with application of force oil cylinder 2, and application of force oil pocket A5 communicates with the A chamber of servo valve 1, and application of force oil pocket B6 communicates with the B chamber of servo valve 1, by the pressure of servo valve 1 control application of force oil pocket A5 and application of force oil pocket B6, output drive strength.Resonance oil pocket A10 links to each other with accumulator B13 with accumulator A12 respectively with resonance oil pocket B11, forms the gas-liquid pressing spring.
According to the size of required gas-liquid pressing spring coefficient of elasticity, accumulator can adopt pure fluid pressure type, also can adopt gasbag-type.When required gas-liquid pressing spring coefficient of elasticity was big, accumulator adopted pure fluid pressure type.The size of the elastic coefficient is relevant with accumulator volume and fluid pressure.Required gas-liquid pressing spring coefficient of elasticity hour, accumulator adopts gasbag-type.The size of the elastic coefficient and accumulator gas pressure, volume are relevant.Accumulator can also can be used one group with one.
Application Example: with reference to Fig. 4,
The first step: actuating motor 18 drives oil pump 17 to system's fuel feeding.
Second step: connect the 2/2-way reversal valve A24, the 2/2-way reversal valve B25 that link to each other with pressure-reducing valve 23, and two-bit triplet reversal valve A27, two-bit triplet reversal valve B28.
The 3rd step: by oil pump 17, pressure-reducing valve 23,2/2-way reversal valve B25, give resonance oil pocket A10 pressurising, and give accumulator A12 pressurising by two-bit triplet reversal valve A27.Pressurising pressure is set according to operating frequency and required gas-liquid pressing spring coefficient of elasticity.
The 4th step: by oil pump 17, pressure-reducing valve 23,2/2-way reversal valve A24, give resonance oil pocket B11 pressurising, and give accumulator B13 pressurising by two-bit triplet reversal valve B28.Pressurising pressure is set according to operating frequency and required gas-liquid pressing spring coefficient of elasticity.
The 5th step: after resonance oil pocket and accumulator group pressure reach setting value, disconnect 2/2-way reversal valve A24,2/2-way reversal valve B25.
The 6th step: after beginning vibration, by the pressure of servo valve 1 control application of force oil pocket A5 and application of force oil pocket B6, piston rod 3 and workpiece 7 vibrations.When the pressure rising of servo valve control application of force oil pocket A5, when the pressure of application of force oil pocket B6 reduced, piston moved up.Because liquid has compressibility with gas in resonance oil pocket and the accumulator, so the pressure of fluid increase among the resonance oil pocket A10, the pressure of fluid reduces among the resonance oil pocket B11, makes piston be subjected to a downward restoring force after acting on the piston.When the pressure reduction of servo valve 1 control application of force oil pocket A5, when the pressure of application of force oil pocket B6 raise, piston rod 3 moved down, and the pressure of fluid reduces among the resonance oil pocket A10, and the pressure of fluid increases among the resonance oil pocket B11, and piston 3 is subjected to a restoring force that makes progress.This restoring force tries hard to make piston to return to the equilbrium position.The piston move distance is big more, and restoring force is big more.Restoring force is directly proportional with the piston move distance.
The 7th step: vibration finishes, and disconnects two-bit triplet reversal valve A27 and two-bit triplet reversal valve 28, and resonance oil pocket A10 and resonance oil pocket B11 and accumulator A12 and accumulator B13 are disconnected.
Claims (2)
1, a kind of complex vibration device, comprise application of force oil cylinder (2) and servo valve (1), it is characterized in that: application of force oil pocket A (5) and application of force oil pocket B (6) both sides at application of force oil cylinder (2) are provided with resonance oil pocket A (10) and resonance oil pocket B (11) composition composite oil cylinder (8) respectively, the dividing plate (9) at composite oil cylinder (8) center is divided into two composite oil cylinder (8), be connected with two piston (4-1 on the piston rod (3), 4-2), dividing plate (9), two piston (4-1,4-2) composite oil cylinder (8) is divided into four oil pockets, be application of force oil pocket A (5), application of force oil pocket B (6), resonance oil pocket A (10) and resonance oil pocket B (11), application of force oil pocket A (5) communicates with the A chamber of servo valve (1), application of force oil pocket B (6) communicates with the B chamber of servo valve (1), and resonance oil pocket A (10) links to each other with accumulator B (13) with accumulator A (12) respectively with resonance oil pocket B (11).
2, a kind of method for oscillating according to the described complex vibration device of claim 1 is characterized in that following step:
1) by oil pump (17), pressure-reducing valve (23), 2/2-way reversal valve B (25), 2/2-way reversal valve A (24), give resonance oil pocket A (10) and resonance oil pocket B (11) pressurising respectively, and give accumulator A (12) and accumulator B (13) pressurising respectively by two-bit triplet reversal valve A (27), two-bit triplet reversal valve B (28);
2) after resonance oil pocket and accumulator group pressure reach setting value, disconnect 2/2-way reversal valve A (24) and 2/2-way reversal valve B (25);
3) pass through the pressure that servo valve (1) is controlled application of force oil pocket A (5) and application of force oil pocket B (6), piston rod (3) and workpiece (7) vibration, pressure rising as servo valve 1 control application of force oil pocket A (5), when the pressure of application of force oil pocket B (6) reduces, piston rod (3) rises, the pressure of fluid increases among the resonance oil pocket A (10), and the pressure of fluid reduces among the resonance oil pocket B (11), and piston (3) is subjected to a downward restoring force;
Pressure reduction as servo valve 1 control application of force oil pocket A (5), when the pressure of application of force oil pocket B (6) raise, piston rod (3) descended, and the pressure of fluid reduces among the resonance oil pocket A (10), the pressure of fluid increases among the resonance oil pocket B (11), and piston (3) is subjected to a restoring force that makes progress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100426024A CN100352563C (en) | 2005-04-27 | 2005-04-27 | Compound vibration unit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100426024A CN100352563C (en) | 2005-04-27 | 2005-04-27 | Compound vibration unit and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1672811A CN1672811A (en) | 2005-09-28 |
| CN100352563C true CN100352563C (en) | 2007-12-05 |
Family
ID=35045733
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100426024A Expired - Fee Related CN100352563C (en) | 2005-04-27 | 2005-04-27 | Compound vibration unit and method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103712787B (en) * | 2013-12-27 | 2016-12-07 | 天津航天瑞莱科技有限公司苏州分公司 | Pressures cycle service life experiment system and method |
| CN105149238A (en) * | 2015-05-18 | 2015-12-16 | 刘影 | Strong vibration pipe of potato weight grader |
| CN108645731B (en) * | 2018-07-24 | 2024-02-13 | 山河智能装备股份有限公司 | High-voltage pulse fatigue test method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105899A (en) * | 1986-09-09 | 1987-06-17 | 国家地震局工程力学研究所 | Electrohydraulic servo vibration exciting installation |
| CN1040159A (en) * | 1988-08-10 | 1990-03-07 | 浙江大学 | Can eliminate the hydraulic vibration device of piston skew automatically |
| DE4221486A1 (en) * | 1991-07-01 | 1993-02-04 | Netter Vibrationstechnik Gmbh | Portable pneumatic vibrator with vacuum cup clamping - generated by venturi nozzle supplied with air through throttle or through freeze flow by-pass for max. clamping force |
| DE4325983A1 (en) * | 1993-08-03 | 1995-02-09 | Wilhelm Steinhoff Nachf Gmbh | Servohydraulic oscillation exciter |
-
2005
- 2005-04-27 CN CNB2005100426024A patent/CN100352563C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105899A (en) * | 1986-09-09 | 1987-06-17 | 国家地震局工程力学研究所 | Electrohydraulic servo vibration exciting installation |
| CN1040159A (en) * | 1988-08-10 | 1990-03-07 | 浙江大学 | Can eliminate the hydraulic vibration device of piston skew automatically |
| DE4221486A1 (en) * | 1991-07-01 | 1993-02-04 | Netter Vibrationstechnik Gmbh | Portable pneumatic vibrator with vacuum cup clamping - generated by venturi nozzle supplied with air through throttle or through freeze flow by-pass for max. clamping force |
| DE4325983A1 (en) * | 1993-08-03 | 1995-02-09 | Wilhelm Steinhoff Nachf Gmbh | Servohydraulic oscillation exciter |
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|---|---|
| CN1672811A (en) | 2005-09-28 |
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Granted publication date: 20071205 Termination date: 20110427 |