CN104343673A - Low-pulsation pump source system based on odd number of plunger pumps - Google Patents
Low-pulsation pump source system based on odd number of plunger pumps Download PDFInfo
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- CN104343673A CN104343673A CN201410513561.1A CN201410513561A CN104343673A CN 104343673 A CN104343673 A CN 104343673A CN 201410513561 A CN201410513561 A CN 201410513561A CN 104343673 A CN104343673 A CN 104343673A
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Abstract
The invention relates to a low-pulsation pump source system based on an odd number of plunger pumps. The low-pulsation pump source system comprises an axial plunger pump and an attenuator, wherein the axial plunger pump comprises an oil inlet, an oil outlet, an odd number of hydraulic chambers and plungers, the hydraulic chambers are connected between the oil inlet and the oil outlet, and the plungers are matched with the hydraulic chambers; the axial plunger pump is used for generating kinetic energy output through the change of relative position of the plungers and the hydraulic chambers; the attenuator is connected between the oil inlet and the oil outlet of the axial plunger pump in parallel and used for at least partly eliminating liquid pulsation generated by the axial plunger pump during oil absorption and oil extraction. According to the low-pulsation pump source system, the attenuator can buffer the pulsation generated by the axial plunger pump during oil absorption and oil extraction, and therefore the whole hydraulic system is more stable and reliable in work.
Description
Technical field
The present invention relates to a kind of hydraulic system, particularly a kind of low pulse pump source system based on odd piston pump.
Background technique
The hydraulic system advantages such as large and anti-loading rigidity is large with its specific power, have obtained application widely in many essential industry departments such as Aeronautics and Astronautics, boats and ships.Along with hydraulic system is to high speed, high pressure, high-power future development, the vibration and noise problem of hydraulic energy source pipe-line system is on the rise, and has become the bottleneck of restriction hydraulic system to high pressure, low noise future development.
At present, hydraulic system adopts axial piston pump to provide hydraulic energy source mostly, because axial piston pump has, delivery pressure is high, working efficiency is high and high reliability.But axial piston pump will inevitably produce fluid pulsation due to himself structure and working principle.Because pump is inner and inevitably there is liquid resistance in pipe-line system, fluid pulsation can cause pressure pulsation again.Pressure pulsation, to the harm of hydraulic energy source pipe-line system, shows with the form of solid liquid interation usually, and namely pressure pulsation produces pipe vibration, and pipe vibration affects pressure pulsation again conversely.This pipe vibration due to fluid structurecoupling generation, is easy to make pipe-line system produce fatigue ruption and radiated noise.Therefore, hydraulic fluid pulsations is the basic origin cause of formation of the structural vibration of hydraulic energy source pipe-line system and radiated noise.
The pipeline vibration that hydraulic fluid pulsations causes and noise problem all bring adverse influence for the Performance And Reliability of the hydraulic energy source pipe-line system in various application, and main manifestations is as follows:
(1) the destructive severity of consequence that causes plane hydraulic system of hydraulic fluid pulsations is particularly outstanding.Because aircraft is very high to weight demands, hydraulic pressure tube wall is thinner, and pumping source rotating speed is high simultaneously, and vibration frequency is high, and aircaft configuration is relatively frivolous, and pipe clamp support stiffness is lower, and resonance is strong.According to ASSOCIATE STATISTICS, only about half of in the inefficacy of plane hydraulic system reported so far is be derived from the hydraulic pipe line that fluid pulsation causes to destroy.At the beginning of the eighties in last century, China destroys because fluid pulsation causes hydraulic output conduit rupture when-8I fighter is taken a flight test, and after taking off, whole airplane is burnt; The mid-90, when China's type fighter flies, because fluid pulsation causes pipeline resonance to make pipe-support and the fracture of oil filter dummy pipe, cause hydraulic system fails aloft; Also there is the accident of the inefficacy of hydraulic energy system pipe-support, pipe breakage in Su-27 fighter.
(2) for hydraulic system of ship, the vibration and noise not only influential system service behaviour that fluid pulsation produces, and for some ship of war, the noise that fluid pulsation produces has larger negative effect to its Sound stealth, directly have influence on decisive range and the stealth effect of sonar, be related to vitality and the fighting capacity of military boats and ships or submarine.
(3) for the electrohydraulic servo system of highi degree of accuracy, high frequency sound, the accurate control performance of the fluid pulsation in hydraulic pipe line to electrohydraulic servo system has a significant impact, as low-speed characteristic and flatness etc.
Due to inherent structure and the working principle of axial piston pump, its oil-absorbing process also exists discontinuity equally, also there is fluid pulsation in the fuel sucking pipe that this discontinuity just causes hydraulic energy source pipe-line system, pipeline vibration caused by it is same with radiated noise problem can not ignore.Therefore, the fluid pulsation in hydraulic system suction & delivery oil hose road is suppressed simultaneously, there is very important realistic meaning.But the fluid pulsation attenuator existed at present is all the Passive Control of carrying out fluid pulsation for a hydraulic pipe line (oil exit pipe or fuel sucking pipe) isolatedly.If want to suppress the fluid pulsation in fuel sucking pipe and oil exit pipe simultaneously, need to install fluid pulsation attenuator respectively on suction & delivery oil hose road, this adds the complexity of system undoubtedly.
Summary of the invention
Provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
A main purpose of the present invention is to provide a kind of low pulse pump source system based on odd piston pump, can eliminate fluid pulsation when axial piston pump oil suction and oil extraction.
According to an aspect of the present invention, a kind of low pulse pump source system based on odd piston pump, comprises axial piston pump and attenuator;
Wherein:
Described axial piston pump comprises filler opening, oil outlet, and the odd number hydraulic pressure cavity be connected between described filler opening and oil outlet and the plunger matched with each described hydraulic pressure cavity, export for producing kinetic energy by the relative position change of described plunger and described hydraulic pressure cavity;
Between the filler opening that described attenuator is connected in parallel on described axial piston pump and oil outlet, for eliminating the liquid pulsation that described axial piston pump produces when oil suction and oil extraction at least in part.
Adopt the low pulse pump source system based on odd piston pump of the present invention, can be cushioned the pulsation produced when axial piston pump oil suction and oil extraction by attenuator, thus make the work of whole hydraulic system more reliable and more stable.
Accompanying drawing explanation
Below with reference to the accompanying drawings illustrate embodiments of the invention, above and other objects, features and advantages of the present invention can be understood more easily.Parts in accompanying drawing are just in order to illustrate principle of the present invention.In the accompanying drawings, same or similar technical characteristics or parts will adopt same or similar reference character to represent.
Fig. 1 is the structural drawing of a kind of mode of execution of the low pulse pump source system based on odd piston pump of the present invention;
Fig. 2 is the structural drawing of a kind of mode of execution of axial piston pump of the present invention;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the structural drawing of a kind of mode of execution of attenuator of the present invention;
Fig. 5 a is the oil extraction flow pulsation-time plot of axial piston pump;
Fig. 5 b is the oil suction flow pulsation-time plot of axial piston pump.
Embodiment
With reference to the accompanying drawings embodiments of the invention are described.The element described in an accompanying drawing of the present invention or a kind of mode of execution and feature can combine with the element shown in one or more other accompanying drawing or mode of execution and feature.It should be noted that for purposes of clarity, accompanying drawing and eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process in illustrating.
Shown in Figure 1, be the structural drawing of a kind of mode of execution of the low pulse pump source system based on odd piston pump of the present invention.
In the present embodiment, the low pulse pump source system based on odd piston pump comprises axial piston pump 20 and attenuator 10.
Wherein, as shown in Figures 2 and 3, axial piston pump 20 comprises filler opening 28, oil outlet 29, and be connected to odd number hydraulic pressure cavity between filler opening 28 and oil outlet 29 (such as, nine hydraulic pressure cavity 1-9 as shown in Figure 3) and the plunger 22 that matches with each hydraulic pressure cavity, export for producing kinetic energy by the relative position change of plunger 22 and hydraulic pressure cavity 1-9.
Attenuator 10 is connected in parallel between the filler opening 28 of axial piston pump 20 and oil outlet 29, for eliminating the liquid pulsation that axial piston pump 20 produces when oil suction and oil extraction at least in part.
Axial piston pump 20 in present embodiment can adopt axial piston pump general in prior art.Such as, axial piston pump 20, except each parts described above, also comprises cylinder body 21, thrust plate 23, housing 24, piston shoes 25, swash plate 26 and live axle 27.
Because axial piston pump 20 comprises odd number hydraulic pressure cavity, this axial piston pump 20 oil suction flow in the course of the work and oil extraction flow reach maximum value and minimum value simultaneously.
Nine plunger 1-9 (the oil extraction flow pulsation-time plot see the oil suction flow pulsation-time plot of the axial piston pump of Fig. 5 a and the axial piston pump of Fig. 5 b) are had for axial piston pump 20.
According to the position distribution relation of plunger as shown in Figure 3 in thrust plate plane, when first plunger (plunger 1) in oil extraction district is positioned at tdc position, first plunger (plunger 6) in oil suction district have rotated 20 ° relative to BDC.Consider this geometric properties, the oil extraction flow pulsation of axial piston pump 20 and oil suction flow pulsation are plotted on same time shaft, as shown in Fig. 5 a, Fig. 5 b.
As can be seen from Fig. 5 a and Fig. 5 b, the oil extraction flow of closed-type axial plunger pump is because of when there is trough in downdraft dischage (T1 as shown in Figure 5 a), and oil suction flow is just in time in the trough place (T2 as shown in Figure 5 b) because geometry flow causes; And when the oil extraction flow of axial piston pump occurs crest because of geometry flow amount (P1 as shown in Figure 5 a), oil suction flow is just in time in the crest place (P2 as shown in Figure 5 b) because downdraft dischage causes.This is because the position relationship shown in Fig. 3 determines, because plunger pump turns over the half that 20 ° of needed times are plunger pump (9 plunger) flow pulsation cycles.Therefore, can think that the phase place of suction oil flow pulsation is identical.
When axial piston pump 20 works, also enter while liquid inlet and outlet axial piston pump 20 in attenuator 10 in parallel with it, and then a part of liquid can be shunted, thus reduce whole based on the fluid pulsation in the low pulse pump source system of odd piston pump.
As a kind of mode of execution, shown in Figure 4, attenuator 10 can comprise the first attenuation module 11 and the second attenuation module 12 of parallel placement.
First attenuation module 11 can comprise the first cavity 111 being provided with the first liquid entering hole and the first Buffer Unit being arranged in the first cavity 111, and the first liquid entering hole is connected to the filler opening 28 of axial piston pump 20.
Second attenuation module 12 can comprise the second cavity 121 being provided with the second liquid entering hole and the second Buffer Unit being arranged in the second cavity 121, and the second liquid entering hole is connected to the oil outlet 29 of axial piston pump 20.
In one embodiment, the first Buffer Unit comprises the first plate washer 1a, the first mass block 1b and the first elastomer 1c.
The first end of the first elastomer 1c is fixed to the other end relative with the first liquid entering hole on the first cavity 111, and second end of the first elastomer 1c and first side of the first mass block 1b are connected; The opposite side relative with the first side and the first plate washer 1a of the first mass block 1b are connected; First plate washer 1a perpendicular to the feed liquor direction of the first liquid entering hole, for moving under the force action of the fluid pressure and the first elastomer 1c elastic force that are entered the first cavity 111 by the first liquid entering hole.
Second Buffer Unit 122 comprises the second plate washer 2a, the second mass block 2b and the second elastomer 2c.
Second end of the second elastomer 2c is fixed to the other end relative with the second liquid entering hole of on the second cavity 121, and second end of the second elastomer 2c and first side of the second mass block 2b are connected; The opposite side relative with the first side and the second plate washer 2a of the second mass block 2b are connected.Second plate washer 2a perpendicular to the feed liquor direction of the second liquid entering hole, for moving under the force action of the fluid pressure and the second elastomer 2c elastic force that are entered the second cavity 121 by the second liquid entering hole.
Such as, when oil suction flow and oil extraction flow reach crest simultaneously, when liquid enters the first liquid entering hole be connected with axial piston pump 20 filler opening 28 and the second liquid entering hole be connected with axial piston pump 20 oil outlet 29 simultaneously, the the first mass block 1b before formed and the equilibrium position of the second mass block 2b are broken, first plate washer 1a the first elastomer 1c with enter the first liquid entering hole liquid pressure force action under, drive the first mass block 1b to move upward.Meanwhile, the second plate washer 2a the second elastomer 2c with enter the second liquid entering hole liquid pressure force action under, drive the second mass block 2b to move downward.So, can to the effect playing buffering based on the liquid pulsation in the low pulse pump source system of odd piston pump.
In a kind of optimal way, attenuator can also comprise synchronizer.Synchronizer is connected respectively with the first mass block 1b and the second mass block 2b, is provided for the first mass block 1b and changes relative to the second displacement synchronous of the second liquid entering hole relative to the first displacement of the first liquid entering hole and the second mass block 2b.
Due to of the present invention based in the low pulse pump source system of odd piston pump, the phase place of the suction of plunger pump oil flow pulsation is identical.When oil suction flow reaches peak value, oil extraction flow also synchronously reaches peak value.Therefore, synchronizer is set, the first mass block 1b can be made to change relative to the second displacement synchronous of the second liquid entering hole relative to the first displacement of the first liquid entering hole and the second mass block 2b, thus make the amount of liquid entering the first liquid entering hole equal with the amount of liquid entering the second liquid entering hole, and then sync buffering oil suction flow and oil extraction flow.
In one embodiment, synchronizer can comprise connecting rod 23 and hinge 24.The two ends of connecting rod 23 are connected with the second mass block 2b with the first mass block 1b respectively, and the center of connecting rod 23 and hinge are connected.
So, due to the limited length of connecting rod, position-limiting action can be played to the movement travel of the first mass block 1b and the second mass block 2b, to avoid in extreme circumstances, the first mass block 1b or the excessive damage that first attenuation module 11 or the second attenuation module 12 are caused of the second mass block 2b movement travel.
In one embodiment, the first cavity 111 is equal with the volume of the second cavity 121.First elastomer 1c and the second elastomer 2c can comprise spring or other can provide arbitrarily the device of elastic force.
The low pulse pump source system based on odd piston pump of present embodiment can also comprise hydraulic power Qcp, fuel sucking pipe 30 and oil exit pipe 40.
Fuel sucking pipe 30 is connected between the filler opening of hydraulic power Qcp and axial piston pump 20, for when axial piston pump 20 oil suction, the oil in hydraulic power is delivered in each hydraulic pressure cavity 1-9 of axial piston pump via fuel sucking pipe 30.
Oil exit pipe 40 is connected between the oil outlet of hydraulic power Qcp and axial piston pump 20, for when axial piston pump 20 oil extraction, the oil in each hydraulic pressure cavity 1-9 of axial piston pump 20 is back in hydraulic power Qcp via oil exit pipe.
Such as, when the low pulse pump source system work based on odd piston pump, under the drive of external motor M, the to-and-fro motion in hydraulic pressure cavity 1-9 of each piston 22, make liquid from hydraulic power, pump out the filler opening 28 entering axial piston pump through fuel sucking pipe 30, and then discharged through oil exit pipe 40 by oil outlet 29, thus the running of band dynamic load Ql.Be back to again in hydraulic power Qcp by the liquid after load Ql.
In one embodiment, the direction of arrow in Fig. 1 represents the flow direction of liquid in the low pulse pump source system based on odd piston pump.
As a kind of preferred version, the low pulse pump source system based on odd piston pump can also comprise relief valve 50.
Relief valve is connected with hydraulic power Qcp, for when exceeding predetermined value based on the hydraulic pressure in the low pulse pump source system pipeline of odd piston pump, is discharged to based on unnecessary liquid in the low pulse pump source system pipeline of odd piston pump in fuel tank 60.So, can ensure originally based on the Security of the low pulse pump source system of odd piston pump.
Adopt the low pulse pump source system based on odd piston pump of the present invention, due to attenuator 10 can the elimination axial piston pump 20 of part work time the flow pulsation that produces, make the whole low pulse pump source system work based on odd piston pump more reliable and more stable.
In equipment of the present invention and method, obviously, each parts or each step reconfigure after can decomposing, combine and/or decomposing.These decompose and/or reconfigure and should be considered as equivalents of the present invention.Also it is pointed out that the step performing above-mentioned series of processes can order naturally following the instructions perform in chronological order, but do not need necessarily to perform according to time sequencing.Some step can walk abreast or perform independently of one another.Simultaneously, above in the description of the specific embodiment of the invention, the feature described for a kind of mode of execution and/or illustrate can use in one or more other mode of execution in same or similar mode, combined with the feature in other mode of execution, or substitute the feature in other mode of execution.
Should emphasize, term " comprises/comprises " existence referring to feature, key element, step or assembly when using herein, but does not get rid of the existence or additional of one or more further feature, key element, step or assembly.
Although described the present invention and advantage thereof in detail, be to be understood that and can have carried out various change when not exceeding the spirit and scope of the present invention limited by appended claim, substituting and conversion.And the scope of the application is not limited only to the specific embodiment of process, equipment, means, method and step described by specification.One of ordinary skilled in the art will readily appreciate that from disclosure of the present invention, can use perform the function substantially identical with corresponding embodiment described herein or obtain and its substantially identical result, existing and that will be developed in the future process, equipment, means, method or step according to the present invention.Therefore, appended claim is intended to comprise such process, equipment, means, method or step in their scope.
Claims (9)
1. based on a low pulse pump source system for odd piston pump, it is characterized in that, comprise axial piston pump and attenuator;
Wherein:
Described axial piston pump comprises filler opening, oil outlet, and the odd number hydraulic pressure cavity be connected between described filler opening and oil outlet and the plunger matched with each described hydraulic pressure cavity, export for producing kinetic energy by the relative position change of described plunger and described hydraulic pressure cavity;
Between the filler opening that described attenuator is connected in parallel on described axial piston pump and oil outlet, for eliminating the liquid pulsation that described axial piston pump produces when oil suction and oil extraction at least in part.
2. the low pulse pump source system based on odd piston pump according to claim 1, is characterized in that, described attenuator comprises the first attenuation module and second attenuation module of parallel placement;
Described first attenuation module comprises the first cavity being provided with the first liquid entering hole and the first Buffer Unit being arranged in described first cavity, and described first liquid entering hole is connected to the filler opening of described axial piston pump;
Described second attenuation module comprises the second cavity being provided with the second liquid entering hole and the second Buffer Unit being arranged in described second cavity, and described second liquid entering hole is connected to the oil outlet of described axial piston pump.
3. the low pulse pump source system based on odd piston pump according to claim 2, is characterized in that:
Described first Buffer Unit comprises the first plate washer, the first mass block and the first elastomer;
Described first elastomeric first end is fixed to the other end relative with the first liquid entering hole on the first cavity, and the first side of described first elastomeric second end and described first mass block is connected; The opposite side relative with described first side and described first plate washer of described first mass block are connected; Described first plate washer perpendicular to the feed liquor direction of described first liquid entering hole, for moving under the force action of the fluid pressure and the first elastomer elastic force that are entered the first cavity by the first liquid entering hole;
Described second Buffer Unit comprises the second plate washer, the second mass block and the second elastomer;
Described second elastomeric second end is fixed to the other end relative with the second liquid entering hole on the second cavity, and the first side of described second elastomeric second end and described second mass block is connected; The opposite side relative with described first side and described second plate washer of described second mass block are connected; Described second plate washer perpendicular to the feed liquor direction of described second liquid entering hole, for moving under the force action of the fluid pressure and the second elastomer elastic force that are entered the second cavity by the second liquid entering hole.
4. the low pulse pump source system based on odd piston pump according to claim 3, is characterized in that, also comprise synchronizer;
Described synchronizer is connected respectively with described first mass block and described second mass block, is provided for described first mass block and changes relative to the second displacement synchronous of described second liquid entering hole relative to the first displacement of described first liquid entering hole and described second mass block.
5. the low pulse pump source system based on odd piston pump according to claim 4, is characterized in that:
Described synchronizer comprises connecting rod and hinge;
The two ends of described connecting rod are connected with described second mass block with described first mass block respectively, and the center of described connecting rod and described hinge are connected.
6. the low pulse pump source system based on odd piston pump according to claim 2, is characterized in that:
Described first cavity is equal with the volume of described second cavity.
7. the low pulse pump source system based on odd piston pump according to claim 2-6 any one, is characterized in that, described first elastomer and described second elastomer comprise spring.
8. the low pulse pump source system based on odd piston pump according to claim 7, is characterized in that, also comprise hydraulic power, fuel sucking pipe and oil exit pipe;
Described fuel sucking pipe is connected between the filler opening of described hydraulic power and described axial piston pump, for when described axial piston pump oil suction, makes the oil in hydraulic power be delivered in each hydraulic pressure cavity of described axial piston pump via described fuel sucking pipe;
Described oil exit pipe is connected between the oil outlet of described hydraulic power and described axial piston pump, for when described axial piston pump oil extraction, the oil in each hydraulic pressure cavity of described axial piston pump is back in described hydraulic power via described oil exit pipe.
9. the low pulse pump source system based on odd piston pump according to claim 8, is characterized in that:
Also comprise relief valve;
Described relief valve is connected with described hydraulic power, for described exceed predetermined value based on the hydraulic pressure in the low pulse pump source system pipeline of odd piston pump time, discharge described based on liquid unnecessary in the low pulse pump source system pipeline of odd piston pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410513561.1A CN104343673B (en) | 2014-09-29 | 2014-09-29 | Low pulse pump source system based on odd piston pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410513561.1A CN104343673B (en) | 2014-09-29 | 2014-09-29 | Low pulse pump source system based on odd piston pump |
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| CN104343673A true CN104343673A (en) | 2015-02-11 |
| CN104343673B CN104343673B (en) | 2016-08-24 |
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| CN201410513561.1A Active CN104343673B (en) | 2014-09-29 | 2014-09-29 | Low pulse pump source system based on odd piston pump |
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Cited By (1)
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| CN107100908A (en) * | 2017-05-23 | 2017-08-29 | 中国人民解放军海军工程大学 | A kind of fluid pulsation suppressing method based on auxiliary pumping source configuration |
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| CN104343673B (en) | 2016-08-24 |
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