CN108590995A - variable pump and hydraulic system - Google Patents

variable pump and hydraulic system Download PDF

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Publication number
CN108590995A
CN108590995A CN201810324716.5A CN201810324716A CN108590995A CN 108590995 A CN108590995 A CN 108590995A CN 201810324716 A CN201810324716 A CN 201810324716A CN 108590995 A CN108590995 A CN 108590995A
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CN
China
Prior art keywords
driving
stator sleeve
direction
shell
variable pump
Prior art date
Application number
CN201810324716.5A
Other languages
Chinese (zh)
Inventor
王长健
Original Assignee
王长健
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 王长健 filed Critical 王长健
Priority to CN201810324716.5A priority Critical patent/CN108590995A/en
Publication of CN108590995A publication Critical patent/CN108590995A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/047Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/0474Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders with two or more serially arranged radial piston-cylinder units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06Control
    • F04B1/07Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft

Abstract

The invention discloses a kind of variable pump and hydraulic system, variable pump includes:Shell, it is interior that there is accommodating cavity;Stator sleeve is set in accommodating cavity and can be moved in accommodating cavity;Rotor core is set in stator sleeve and can be rotated in stator sleeve under the driving of external impetus;Multiple plungers, circumferential is arranged on rotor core;Driving mechanism comprising:First driving portion is used to drive stator sleeve to move linearly towards first direction;Second driving portion is used for after the first driving portion completes the driving to stator sleeve in a first direction, and driving stator sleeve is moved towards second direction.Institute's second direction is different from second direction, and first direction and second direction are the direction of the axis perpendicular to rotor core.The variable pump of the present invention drives stator sleeve to move in two directions by two driving portions so that the adjusting of eccentricity, which can meet, adjusts sensitive requirement and the requirement of degree of regulation.

Description

Variable pump and hydraulic system

Technical field

The present invention relates to technical field of engineering machinery, more particularly to the hydraulic system at a kind of variable pump and its place.

Background technology

Engineering machinery would generally be using hydraulic system as apparatus for work power, for example, the pivot large arm of excavator, paves Running gear of machine etc. provides power by hydraulic system.

It is known to, hydraulic system would generally include dynamical element (such as hydraulic pump), (such as reversal valve overflows control element Flow valve etc.) and executive component (such as hydraulic cylinder, motor).Dynamical element is for providing hydraulic oil, and control element is for controlling The pressure of hydraulic oil and the flow direction of hydraulic oil etc., executive component are used to convert the kinetic energy of hydraulic oil to mechanical kinetic energy to drive Apparatus for work.

To meet operating mode needs, technical staff will be arranged to as the hydraulic pump of dynamical element can be with the knot of Displacement Regulation Structure, changes the flow of the hydraulic oil of supply executive component by Displacement Regulation, and the change of the flow can also influence entirely indirectly The pressure of hydraulic system.

Hydraulic pump would generally include shell, the stator sleeve being set in shell and be located in stator sleeve and inclined with stator sleeve The rotor core of heart setting, circumferentially multiple plungers on rotor core, when rotor core rotates, multiple plunger pumps are by stator sleeve Internal alternation squeezes, and to make plunger realize, oil suction and oil extraction effect, the oil extraction act as whole system and provide hydraulic oil.It is corresponding Ground, variable pump in the prior art usually using the eccentricity for changing stator sleeve and rotor core change hydraulic pump discharge capacity (that is, The oil drain quantity of plunger).

Changing the method for the discharge capacity of hydraulic pump in the prior art is:

The flow of the hydraulic oil in the exit of hydraulic pump is obtained using flowmeter, then, is utilized according to the flow of hydraulic pump Driving part adjusts the eccentricity in hydraulic pump between stator sleeve and rotor core, and the specific adjusting method of eccentricity is: Straight-line displacement is generated in one direction using driving part driving stator sleeve, that is, the motion process of stator sleeve is always a straight line It is mobile.

There are following defects for the adjusting method of hydraulic system in the prior art, variable pump and variable pump:

1, variable pump in the prior art is according to the flow-rate adjustment eccentricity and discharge capacity in its exit so that the change after adjusting Amount pump can not provide accurate flow for hydraulic system.

2, displacement caused by stator sleeve contributes to eccentricity, that is to say, that the displacement variable of stator sleeve is equal to inclined The heart away from variation variable quantity, accordingly, if driving part driven by being contacted between stator sleeve stator sleeve generate displacement, drive (it is specified that so-called drive displacement actually refers to that driving part can be such that stator sleeve is moved to the driving force and drive displacement of dynamic component The variable for the displacement and eccentricity that the displacement of position, drive displacement and stator sleeve production generate is equal) need accurate ability accurate True adjusting eccentricity, however, driving part in the prior art is mostly drive cylinder or driving piston 42, the driving part Dynamic accuracy and displacement accuracy are inaccurate, so that variable pump can not essence using above-mentioned adjusting method and driving part True adjusting eccentricity.

3, service life of the above-mentioned discharge capacity adjusting method of variable pump in the prior art for the control element of such as overflow valve And hydraulic system reliability and noise control it is unfavorable.

Invention content

For the above-mentioned technical problems in the prior art, the embodiment provides a kind of variable pump and hydraulic pressure System.

In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that:

A kind of variable pump, the variable pump include:

Shell, it is interior that there is accommodating cavity;

Stator sleeve is set in the accommodating cavity and can be moved in the accommodating cavity;

Rotor core, is set in the stator sleeve and can be under the driving of external impetus in the stator sleeve transfer It is dynamic;

Multiple plungers, circumferential is arranged on the rotor core;

Driving mechanism comprising:

First driving portion is used to drive the stator sleeve to move linearly towards first direction;

Second driving portion is used to complete the driving to the stator sleeve in the first direction when first driving portion Afterwards, the stator sleeve is driven to be moved towards second direction.Institute's second direction be different from the second direction, and the first direction and Second direction is perpendicular to the direction of the axis of the rotor core.

Preferably, the first direction is the line direction in the center of circle of the stator sleeve and the center of circle of the rotor core.

Preferably, the stator sleeve is directly rotatably or is indirectly connected in the shell, the second direction For the rotation direction rotated around the junction of the stator sleeve and the shell.

Preferably, first driving portion includes the first driving group and the first balance group;Second driving portion includes the Two driving groups and the second balance group;Wherein:

First driving group is symmetrically installed in the first balance group in the shell;

Second driving group is symmetrically installed in the second balance group in the shell;

The circumferentially position of first driving group and the circumferentially position of second driving group are in 90 °.

Preferably, which is characterized in that

The arranged on left and right sides of the shell is respectively formed with left directed cavity and right directed cavity of the perforation to the accommodating cavity;

First driving group includes being set in the left directed cavity and capable of being slided along the left directed cavity to push against The driving piston of the stator sleeve, the first spring for being set in the left directed cavity and being abutted with the driving piston;

The first balance group includes being set in the right directed cavity and capable of being slided along the right directed cavity to push against First dummy piston of the stator sleeve, the buckle closure being fixed on the shell, be set to first dummy piston with it is described Second spring between buckle closure wears the buckle closure and for pushing against the second spring to adjust the adjustment spiral shell of its compression degree Nail;

Preferably,

Articulated section is provided on the left of the stator sleeve, the articulated section is rotationally articulated in the driving by axis pin Piston.

The upper and lower both sides of the shell are respectively formed with the upper straight slot for penetrating through the accommodating cavity and lower straight slot;

Second driving group includes lower holding shell, fixing body, electromagnet, deformable body, the first piston shoes, driving body;

The lower downside for keeping shell to be fixed on the shell;The fixing body is fixed in the lower holding shell, described The guide groove that fixing body has mounting groove and penetrates through vertically;The electromagnet includes iron filings and is wound on the iron core Coil, the electromagnet are installed in the mounting groove with the magnetic induction line of formation level;The deformable body is imitated for columned magnetic Memory metal, the deformable body is vertical to be set in the guide groove, and the magnetic induction line can pass through the deformable body;It is described Driving body is set to the top in the guide groove and positioned at the deformable body, described after working as the deformable body by magnetic strength Deformable body increases to drive the driving body to move straight up vertically;The tail portion of first piston shoes is upper with the driving body End is hinged, head be arranged to the matched cylinder in the periphery of the stator sleeve and across the lower straight slot and with the stator sleeve It attaches;

The second balance group includes upper holding shell, third spring, head cover, the second dummy piston and the second piston shoes;

The upper upside for keeping shell to be fixed on the shell, second dummy piston are set to the upper holding shell In, the third spring is set in the upper holding shell and pushes against second dummy piston, the tail portion of second piston shoes It is articulated on second dummy piston, head is arranged to the matched cylinder in the periphery of the stator sleeve and on described Straight slot and with the stator sleeve attach.

Preferably, the peripheral surface of the articulated section at least with part cylindrical surface, and the diameter on the cylindrical surface with it is described Drive the peripheral surface diameter of piston 42 identical, wherein:

When first driving group moves linearly in a first direction, the articulated section is moved initial in a first direction It is at least part of in trip segment to be located in the left guiding chamber.

The invention also discloses a kind of hydraulic systems, including executive component, control element, system pipeline, which is characterized in that It further include above-mentioned variable pump.

Preferably, device for pressure measurement is provided on the system pipeline, the variable pump is filled according to the pressure measurement Measured pressure value is set to drive the stator sleeve to be moved towards first direction and/or second direction to change the variable pump Discharge capacity.

Compared with prior art, the advantageous effect of variable pump disclosed by the invention and hydraulic system is:

1, it is fixed by two driving portion drivings when variable pump of the invention is in applied to the larger hydraulic system of pressure oscillation Sub-set moves in two directions so that the adjusting of eccentricity, which can meet, adjusts sensitive require and degree of regulation It is required that.

2, hydraulic system disclosed in this invention, because of the discharge capacity according to the pressure change variable pump of system pipeline, to Under the premise of disclosure satisfy that executive component to the demand of hydraulic oil so that hydraulic system pressure it is more stable, and hydraulic system is to holding Units and control element have better protective effect.

Description of the drawings

Fig. 1 is the topology view of variable pump provided by the present invention (variable pump is in the state that eccentricity is 0).

Fig. 2 is the partial enlarged view of the A of Fig. 1.

Fig. 3 is the partial enlarged view of the B of Fig. 1.

Fig. 4 is the topology view of variable pump provided by the present invention (variable pump is in the state that eccentricity is e0).

Fig. 5 is the partial enlarged view of the C of Fig. 4.

Fig. 6 is the partial enlarged view of the D of Fig. 4.

Fig. 7 is the topology view of variable pump provided by the present invention (variable pump is in the state that eccentricity is es).

Fig. 8 is the partial enlarged view of the E of Fig. 7.

Fig. 9 is the partial enlarged view of the F of Fig. 7.

Figure 10 is the topology view of variable pump provided by the present invention (variable pump is in the state that eccentricity is en).

Figure 11 is the partial enlarged view of the G of Figure 10.

Figure 12 is the partial enlarged view of the H of Figure 10.

Figure 13 is the partial enlarged view of the G of Figure 10.

In figure:

10- shells;20- stator sleeves;21- the first sliding grooves;22- second sliding slots;The articulated sections 23-;24- third sliding slots;25- is recessed It falls into;30- rotor cores;31- plungers;32- piston shoes;The first driving portions of 40-;41- the first balance groups;The first dummy pistons of 411-; 4111- protrusions;412- second springs;413- buckle closures 413;414- adjusting screws;415- locknuts;42- drives piston;43- first Spring;44- axis pins;The second driving portions of 50-;51- the second balance groups;511- head covers;Shell is kept on 512-;513- third springs; The second bushings of 514-;The second dummy pistons of 515-;The second piston shoes of 516-;52- deformable bodys;53- electromagnets;54- driving bodies; The first glands of 541-;The first piston shoes of 55-;56- adjustment is female;57- fixing bodies;Shell is kept under 571-;The first bushings of 58-;59- the 4th Spring;60- controls valve member.

Specific implementation mode

To make those skilled in the art be better understood from technical scheme of the present invention, below in conjunction with the accompanying drawings and specific embodiment party Formula elaborates to the present invention.

As shown in Fig. 1 to 13, the invention also discloses a kind of variable pump, which includes shell 10, stator sleeve 20, turns Sub- core 30, multiple plungers 31, driving mechanism.Wherein, shell 10 is that detachably separate structure, shell 10 are interior with accommodating cavity; Stator sleeve 20 is set in accommodating cavity and can be moved in accommodating cavity, and the receiving space of accommodating cavity is more than stator sleeve 20, so that Certain movement surplus can be had in accommodating cavity by obtaining stator sleeve 20, and in the present embodiment, the inner wall of accommodating cavity is by two semicircles Wall and the planar wall for connecting two lunettes surround;Rotor core 30 is set in stator sleeve 20, which has axial One end of shell 10 is stretched out, which connect with external impetus component, for example, being directly connected to external drive motors, or pass through Gearbox is connect with external drive motors, and the power part is for driving rotor core 30 to rotate;The circumferential arrangement of multiple plungers 31 Around rotor core 30, one end of the plunger 31 is hinged with rotor core 30, and the inner wall of the other end and stator sleeve 20 is slidably connected, When rotor core 30 rotates, multiple plungers 31 are rotated with rotor core 30 simultaneously, when stator sleeve 20 and rotor core 30 have centainly partially The heart away from when (so-called eccentricity is the distance between the center of circle of stator sleeve 20 and rotor core 30), multiple plungers 31 are with 30 turns of rotor core It moves and carries out alternation stretching or compress to carry out oil suction and oil extraction (oil drain quantity of multiple plungers 31 is the discharge capacity of variable pump), The oil being discharged is used to supply the hydraulic system where variable pump, and changes the alternation that plunger 31 pumps by changing eccentricity and stretch Go out with decrement to change the discharge capacity of variable pump;Driving mechanism includes the first driving portion 40 and the second driving portion 50, the first driving Portion 40 generates drive displacement by itself component and stator sleeve 20 is driven to move linearly in a first direction;Second driving portion 50 is used In after the first driving portion 40 completes the driving to stator sleeve 20 in a first direction, which drives 20 court of stator sleeve Second direction moves, and second direction is different from first direction in the present embodiment, and first direction and second direction are vertical In the direction of the axis of rotor core 30.So-called second direction refers to that first direction has with second direction with first direction difference Certain angle, which is chosen as being less than 180 ° more than 0 °, also, before stator sleeve 20 is moved towards first direction, works as rotor When eccentricity between core 30 and stator sleeve 20 is 0, first direction is the arbitrary radial direction by the center of circle of rotor core 30; When the eccentricity between rotor core 30 and stator sleeve 20 is non-zero, first direction is the center of circle and the stator sleeve 20 of rotor core 30 Direction determined by the line in the center of circle.

Above-mentioned variable pump can adapt to the requirement of the regulated quantity of different discharge capacities, and with adjusting high sensitivity and adjust essence High advantage is spent, actual pressure of the variable pump where according to it in system pipeline of hydraulic system carries out the adjusting of discharge capacity When, adjust sensitivity and degree of regulation it is high advantage it is more obvious.

Above-mentioned variable pump is as follows according to the method and process of the different pressure Displacement Regulation of system pipeline:

When (actual pressure is obtained actual pressure by the device for pressure measurement being connected on system pipeline, the pressure measurement Device can be pressure sensor and pressure gauge) it is more than operating pressure (so that each control element, executive component are normal in hydraulic system The pressure of work) and the difference of actual pressure and operating pressure be less than preset pressure difference when, utilize the first driving portion 40 drive stator The first direction of set 20 towards the axis perpendicular to rotor core 30 moves linearly to reduce eccentricity;When actual pressure is less than work pressure When power and operating pressure and the difference of actual pressure are less than preset pressure difference, using the first driving portion 40 so that stator sleeve 20 is towards vertical It is moved linearly in the negative direction of the first direction of the axis of rotor core 30 to increase eccentricity;When actual pressure is less than operating pressure And the difference of operating pressure and actual pressure value be more than preset pressure difference when, as shown in fig. 7, utilize the first driving portion 40 drive stator After the first direction of set 20 towards the axis perpendicular to rotor core 30 moves linearly, as shown in Figure 10, the second driving portion 50 is utilized to drive Dynamic stator sleeve 20 is towards the second direction movement perpendicular to 30 axis of rotor core, finally to increase eccentricity;When actual pressure is more than When the difference of operating pressure and actual pressure and operating pressure is more than preset pressure difference, stator sleeve 20 is driven using the first driving portion 40 Towards after the negative direction linear movement of the first direction of the axis perpendicular to rotor core 30, driven using 50 mechanism of the second driving portion The negative direction of stator sleeve 20 towards second direction movement or second direction perpendicular to 30 axis of rotor core moves, finally to reduce Eccentricity (motion process and state that are not shown in the drawings the stator sleeve 20 of this kind of situation).

The mode and process of the variable pump Displacement Regulation of above-described embodiment can be regarded as:When actual pressure and operating pressure it Between pressure difference it is smaller when (size of pressure difference based on preset pressure difference judge), that is, actual pressure deviates the journey of operating pressure When degree is smaller, stator sleeve 20 need to be driven to move in a first direction using the first driving portion 40 and eccentricity is made to meet variable pump institute Need the discharge capacity adjusted;And when the pressure difference between actual pressure and operating pressure is larger, that is, actual pressure deviates work Make pressure degree it is larger when, as shown in fig. 7, driving stator sleeve 20 towards straight line on first direction first using the first driving portion 40 It is mobile, then, as shown in Figure 10, recycle the second driving portion 50 that stator sleeve 20 is driven to be moved towards second direction, it is final to make Eccentricity meet the discharge capacity adjusted required for variable pump.Wherein, preset pressure difference is set according to operating pressure, is generally worked / 10th or so of pressure.

The variable pump that above-described embodiment is provided possessed advantage in terms of Displacement Regulation is:

When the degree that actual pressure deviates operating pressure is smaller, the adjusting sensitivity of the discharge capacity of variable pump is key point, At this point, eccentricity can be made quickly to be adjusted to the row needed for variable pump by driving stator sleeve 20 to move in one direction Amount, to make actual pressure quickly be adjusted to operating pressure, to reach sensitive effect.

When the degree that actual pressure deviates operating pressure is larger, the degree of regulation of the discharge capacity of variable pump becomes key point, At this point, making eccentricity quickly be adjusted to one relatively finally by driving stator sleeve 20 to move linearly in a first direction The intermediate eccentricity of eccentricity carries out a coarse adjustment to realize to eccentricity, accordingly, the discharge capacity of variable pump also accordingly into Coarse adjustment is gone;After completing the coarse adjustment to eccentricity, by driving stator sleeve 20 to move in a second direction, make eccentricity Complete an accurate adjustment section after adjusting twice, makes the discharge capacity of variable pump accurately meet very much to obtain final eccentricity Demand of the system to flow.

When the degree that actual pressure deviates operating pressure is larger, the advantage for the displacement pump bigger that above-described embodiment is provided It is:When driving in a first direction, the drive displacement of the first driving portion 40 is completely used for contributing to eccentricity, how many driving Displacement just generates the variable quantity of how many eccentricity, has in this way using making eccentricity quickly be adjusted, and this drive displacement is complete Portion, which contributes to the characteristics of eccentricity but, can not be such that eccentricity realization accurately adjusts, and be merely able to carry out coarse adjustment to eccentricity, and After movement of the stator sleeve 20 on completing first direction, what drive displacement in a second direction only had part contributes to bias Away from, that is to say, that the variable quantity of eccentricity is less than drive displacement in a second direction, in this way, list in a second direction The variable quantity of the eccentricity of position drive displacement contribution is compared to the eccentricity that unit drive displacement in a first direction is contributed It is much smaller, therefore, drive stator sleeve 20 that eccentricity is enable to obtain higher degree of regulation in a second direction.

As described above, when the variable pump of above-described embodiment offer is in applied to the larger hydraulic system of pressure oscillation, Stator sleeve 20 is driven to move in two directions by two driving portions so that it is sensitive that the adjusting of eccentricity can meet adjusting It is required that and meeting the requirement of degree of regulation.

In a preferred embodiment of the invention, as shown in figure 1 to figure 13, the first driving portion 40 includes the first driving group With the first balance group 41;Second driving portion 50 includes the second driving group and the second balance group 51;Wherein:First driving group and first Balance group 41 is symmetrically installed in shell 10;Second driving group is symmetrically installed in the second balance group 51 in shell 10;The The circumferentially position of one driving group and the circumferentially position of the second driving group are in 90 °.In the present embodiment, the first driving portion 40 and second driving portion 50 by contacted with stator sleeve 20 pushing and pressing in a manner of drive stator sleeve 20 movement to change eccentricity.At this In embodiment, the arrangement of the first driving portion 40 and the second driving portion 50 shows in embodiment, what stator sleeve 20 moved First direction and second direction are perpendicular, and the first driving portion 40 and 50 advantage so arranged of the second driving portion are:So that fixed The drive displacement that sub-set 20 is obtained and the ratio of the correspondingly variable quantity of eccentricity are maximum, to improve to the greatest extent partially The heart away from final degree of regulation.

It should be noted that:First driving group drives the straight line in a first direction of stator sleeve 20 with the cooperation of the first balance group 41 Mobile, for example, when the force of the first driving group is more than the first balance group 41, stator sleeve 20 is driven by the first driving group towards the It moves linearly (as shown in Figure 7) on one direction, and when the first balance group 41 force is more than the first driving group, stator sleeve 20 is by the One balance drive and towards the negative direction of first direction move linearly (attached to be not shown in figure this kind of situation);For another example when the second drive When the force of dynamic group is more than the second balance group 51, stator sleeve 20 is driven towards second party by the second driving group and moves upwards (such as Figure 10 It is shown), and when the second balance group 51 force is more than the second driving group, stator sleeve 20 by the second balance group 51 drive and towards the The negative direction movement (attached to be not shown in figure this kind of situation) in two directions.

In a preferred embodiment of the invention, as shown in Fig. 1 to 13, the arranged on left and right sides of shell 10 is respectively formed with Penetrate through the left directed cavity to accommodating cavity and right directed cavity;First driving group includes being set in left directed cavity and can be along left guiding First spring of the chamber sliding to push against the driving piston 42 of stator sleeve 20, be set in left directed cavity and abutted with driving piston 42 43;First balance group 41 includes being set in right directed cavity and capable of being slided along right directed cavity flat to push against the first of stator sleeve 20 Weighing apparatus piston 411, the buckle closure 413 being fixed on shell 10, the second bullet being set between the first dummy piston 411 and buckle closure 413 Spring 412 wears buckle closure 413 and (has adjusted pressure for pushing against second spring 412 with the adjusting screw 414 for adjusting its compression degree It after contracting degree, is locked by locknut 415).In the present embodiment, in one control valve member of the external setting in the left side of shell 10 60, external control hydraulic oil (the control hydraulic oil may be from hydraulic system, or be provided by hydraulic oil) passes through control valve Part 60 enters left directed cavity, and the power that driving piston 42 drives stator sleeve 20 is controlled by controlling the pressure of hydraulic oil, so that Driving piston 42 can drive stator sleeve 20 to move in a first direction, when stator sleeve 20 is moved to the scheduled eccentricity of institute, First spring 43 and control hydraulic oil to pass through the first dummy piston with second spring 412 to the active force of stator sleeve 20 The force balance of 411 pairs of stator sleeves 20, at this point, before being not affected by otherwise active force, stator sleeve 20 is maintained at Position after the movement of one direction, corresponding eccentricity keep determining size.In the present embodiment, adjusting screw 414 is for adjusting Whole second spring 412, with when the pressure of the control hydraulic oil in left directed cavity is minimum or left directed cavity in do not feed control liquid Pressure oil and stator sleeve 20 be in so that eccentricity be 0 position when (as shown in Figure 1 to Figure 3), the first spring 43 and second spring 412 by driving piston 42 and dummy piston to reach balance (as shown in Figure 1) to the active force of stator sleeve 20.

In a preferred embodiment of the invention, the left side of stator sleeve 20 is provided with articulated section 23, and articulated section 23 passes through Axis pin 44 is rotationally articulated in driving piston 42.The upper and lower both sides of shell 10 are respectively formed with the upper straight slot of perforation accommodating cavity With lower straight slot.Second driving group includes lower holding shell 571, fixing body 57, electromagnet, deformable body 52, the first piston shoes 55, driving body 54;The lower downside for keeping shell 571 to be fixed on shell 10;Fixing body 57 is fixed in lower holding shell 571, and fixing body 57 has installation Slot and the guide groove penetrated through vertically;Electromagnet 53 is installed in including iron core and the coil being wound on iron core, electromagnet 53 Horizontal magnetic induction line is formed in mounting groove;Deformable body 52 is that columned magnetic imitates memory metal, the vertical setting of deformable body 52 In guide groove, magnetic induction line can pass through deformable body 52;Driving body 54 is set to the top in guide groove and positioned at deformable body 52, After working as deformable body 52 by magnetic strength, deformable body 52 increases to drive driving body 54 to move straight up vertically;First piston shoes 55 Tail portion and driving body 54 upper end it is hinged, head is arranged to and the matched cylinder in the periphery of stator sleeve 20 and passes through lower straight slot And it is attached with stator sleeve 20;Second balance group 51 includes upper holding shell 512, third spring 513, head cover 511, the second dummy piston 515 and second piston shoes 516;The upper upside for keeping shell 512 to be fixed on shell 10, the second dummy piston 515 are set to holding In shell 512, third spring 513, which is set to, to be kept in shell 512 and pushes against the second dummy piston 515, the tail portion of the second piston shoes 516 Be articulated on the second dummy piston 515, head be arranged to the matched cylinder in the periphery of stator sleeve 20 and across upper straight slot and It is attached with stator sleeve 20.Preferably, the lower section of deformable body 52 is provided with adjustment mother 56, and the top of deformable body 52 also sets up use In the 4th spring 59 of pushing and pressing deformable body 52, the 4th spring 59 is for after so that deformable body 52 is lost magnetic strength effect, removing itself The distortion allowance that can not restore.

As shown in Figs. 7-9, after the first driving portion 40 is completed to the driving in a first direction of stator sleeve 20, to electromagnetism Coil is powered, and electromagnet can generate the magnetic induction line that memory metal is imitated across magnetic so that magnetic imitates memory metal towards stator sleeve 20 Side is upwardly-deformed, and then drives driving body 54 towards moving on the direction of stator sleeve 20, and then passes through the first piston shoes 55 and push against stator Set 20 rotates in a second direction, until eccentricity is made to reach final adjusting position.

It should be noted that:As shown in Figure 10 to 13, while the first piston shoes 55 driving stator sleeve 20 rotates, stator sleeve 20 drive the second dummy piston 515 to be moved towards the direction far from stator sleeve 20 by the second piston shoes 516, so that third bullet Spring 513, it is final so that third spring 513 by the second dummy piston 515 and the second piston shoes 516 to the active force of stator sleeve 20 with First piston shoes 55 are to the force balance of stator sleeve 20, to make the suffered dynamic balance in a second direction of stator sleeve 20, with Eccentricity is set to keep stablizing, and when needing to make the direction counter motion in a second direction of stator sleeve 20, make to be passed through electromagnetic wire When the electric current of circle reduces, the deflection that magnetic imitates memory metal reduces, and third spring 513 passes through the second dummy piston 515 and second 516 reverse push of piston shoes supports stator sleeve 20, and stator sleeve 20 is made to move to the equilbrium position for making eccentricity reach expected size.

In the above-described embodiments, it is connected on driving piston 42 by rotatable mode due to stator sleeve 20, first After driving portion 40 makes stator sleeve 20 complete linear movement in a first direction, stator sleeve 20 is enable by the second driving portion 50 Realize rotation in a second direction.Above-described embodiment, which makes stator sleeve 20 be connected by the way of rotationally, makes stator sleeve 20 exist Movement in second direction is easier to realize, and movement is made more to stablize, improve designability, the machinability of variable pump with And assembling capacity.

The magnetic effect memory metal of above-described embodiment is advantageous in that as the power source of driving body 54:On the one hand, magnetic induction line The deflection function correspondence of intensity and magnetic effect metal be one-to-one relationship, and the electric current and electromagnet for passing through coil The relationship of magnetic induction line intensity produced by 53 is also one-to-one relationship, this makes electric current and the deflection of deformable body 52 have one by one Correspondence, so that displacement caused by driving body 54 is more accurate, so that driving body 54 passes through the first piston shoes 55 The position that the movement of driving stator sleeve 20 in a second direction can reach is more accurate, in a second direction to bias Away from adjusting it is more accurate;On the other hand, it after magnetic effect metal is influenced by magnetic induction line, deforms sensitivity and frequency is higher than Mechanical Driven displacement and hydraulic-driven displacement, this makes the adjusting sensitivity higher of eccentricity in a second direction.

Stator sleeve 20 is directly driven in above-described embodiment using the first piston shoes 55 and the second piston shoes 516 in a second direction to turn Dynamic advantage is:The head of first piston shoes 55 and the head of the second piston shoes 516 are matched with the peripheral surface of stator sleeve 20, and first Piston shoes 55 are that hinged mode connects with the tail portion of the second piston shoes 516, so that in stator sleeve 20 around junction rotation one After determining angle, as shown in Fig. 7,9,10,13, the first piston shoes 55 and the second piston shoes 516 still can closely be pasted with stator sleeve 20 It is attached, to improve the stability in the rotation process of stator sleeve 20 in a first direction and the stability after rotation.

In a preferred embodiment of the invention, as shown in figures 7 and 9, corresponding with the first piston shoes 55 in stator sleeve 20 Periphery on offer the first sliding groove 21, so that the slot bottom of the first sliding groove 21 is processed into the higher arcwall face of surface quality, first slides The head of boots 55 is attached at the slot bottom of the first sliding groove 21, to reduce the resistance of the first piston shoes 55 sliding;In stator sleeve 20 and second Piston shoes offer second sliding slot 22 on 516 corresponding periphery, and the slot bottom of second sliding slot 22 is made to be processed into the higher arc of surface accuracy The head in shape face, the second piston shoes 516 is attached at the slot bottom of second sliding slot 22, to reduce the resistance of the second piston shoes 516 sliding.

In a preferred embodiment of the invention, as shown in Figure 1, it is convex in the setting one of the head of the first dummy piston 411 4111 are played, offers third sliding slot 24 on the periphery of 411 corresponding stator sleeve 20 of the first dummy piston, and third sliding slot 24 Slot bottom opens up recess 25, and when the second driving portion 50 not yet drives stator sleeve 20, protrusion 4111 is embedded in recess 25, in this way, When the second driving portion 50 not yet drives stator sleeve 20, the 25 pairs of protrusions 4111 of being recessed have certain restriction effect, to the When one driving portion 40 drives stator sleeve 20, what stator sleeve 20 can be stablized moves without non-first in a first direction Play on direction.When stator sleeve 20 is driven by the second driving portion 50, as shown in Figure 13, protrusion 4111 is slided from recess 25 Go out, limitation of 25 contact of recess to protrusion 4111.

In a preferred embodiment of the invention, as shown in Figure 2 and Figure 5, the peripheral surface of articulated section 23 at least has portion The cylindrical surface divided, and the diameter on the cylindrical surface is identical as the driving peripheral surface diameter of piston 42, wherein:When the first driving group is It is at least part of in the priming stroke section that articulated section 23 is moved in a first direction to be located at left directed cavity when moving linearly on one direction In room.In the present embodiment, so-called priming stroke section is construed as, and the position that should be driven by the second driving portion 50 is having not yet been reached Before setting, the shift motion of stator sleeve 20 in a first direction.In this way, when only need to be by a first direction to the adjusting of eccentricity On when being adjusted, articulated section 23 is at least part of to be located in left directed cavity, to limit the rotation of stator sleeve 20 System carries out play to further effectively prevent stator sleeve 20 on non-first direction.

It should be noted that:As shown in Figure 1 and Figure 4, when variable pump starts from the state that eccentricity is 0 (at this point, variable Pump is used as slippage pump more), original eccentricity distance drives stator sleeve 20 that can obtain in a first direction using the first driving portion 40.

In a preferred embodiment of the invention, as depicted in figure 10 and figure 13, driving body 54 is set in the first bushing, Second dummy piston 515 is set in the second bushing 514, and the first bushing 514 and the second bushing 58 are larger by strength and stiffness Titanium alloy be made.The effect that the larger bushing of strength and stiffness is arranged is:It is driven in the first piston shoes 55 and the second piston shoes 516 For stator sleeve 20 when second direction rotates, the first piston shoes 55 and the second piston shoes 516 can generate larger component radially, and The bushing of the big rigidity of high intensity prevents the damage of the associated components of the component the second driving group of destruction and the second balance group 51.

In a preferred embodiment of the invention, as depicted in figure 10 and figure 13, the first piston shoes 55 and the second piston shoes 516 Tail portion is respectively provided with into ball head structure, and so that the first piston shoes 55 and the second piston shoes 516 is divided by the first gland and the second gland respectively It does not link together with driving body 54 and the second dummy piston 515.

The invention also discloses a kind of hydraulic system, which includes executive component, control element, above-mentioned variable Pump, system pipeline, device for pressure measurement, processor and controller.Wherein, device for pressure measurement be connected on system pipeline with For the pressure of the hydraulic oil in measuring system pipeline, processor and device for pressure measurement are pre-stored hydraulic pressure system in the processor The pressure value of the operating pressure of system, then, by processor to from the obtained actual pressure of device for pressure measurement pressure value with The pressure value of operating pressure is compared, and then, recycles the controller control driving mechanism being electrically connected with processor.Specifically Ground, when controller is used to control driving mechanism (including the first driving group in the first driving portion 40 disclosed in above-described embodiment With the second driving group in the second driving portion 50) when, specific control method is:When the obtained actual pressure of controller is more than work When the difference of pressure and actual pressure and operating pressure is less than preset pressure difference, processor only makes the first drive by controlling valve member 60 First direction of dynamic group (by the pressure and flow that increase hydraulic oil) the driving stator sleeve 20 towards the axis perpendicular to rotor core 30 Linear movement is to reduce eccentricity;When the actual pressure that controller is obtained is less than operating pressure and operating pressure and actual pressure Difference be less than preset pressure difference when, processor only by control valve member 60 make the first driving group ((by reduce hydraulic oil pressure And flow)) so that the negative direction of stator sleeve 20 towards the first direction of the axis perpendicular to rotor core 30 moves linearly to increase partially The heart away from;When the obtained actual pressure of controller is less than operating pressure and the difference of operating pressure and actual pressure value is more than preset pressure When poor, as shown in fig. 7, processor makes the first driving group drive stator sleeve 20 towards perpendicular to rotor core by controlling valve member 60 first After the first direction linear movement of 30 axis, as shown in Figure 10, the size that processor supplies electric current by control again makes second Driving group drives stator sleeve 20 towards the second direction movement perpendicular to 30 axis of rotor core, finally to increase eccentricity;Work as control When the actual pressure that device is obtained is more than operating pressure and the difference of actual pressure and operating pressure more than preset pressure difference, processor The negative side for making the first driving group drive stator sleeve 20 towards the first direction of the axis perpendicular to rotor core 30 by controlling valve member 60 To after linear movement, controller supplies electric current by increase or 50 mechanism of the second driving portion of smaller supply electric current drives stator sleeve 20 courts are perpendicular to the second direction movement of 30 axis of rotor core or the negative direction movement of second direction, finally to reduce bias Away from (motion process and state that are not shown in the drawings the stator sleeve 20 of this kind of situation).

The advantage of hydraulic system disclosed in this invention is:

The discharge capacity that presently disclosed hydraulic system is pumped according to actual pressure come regulated variable, so that discharge capacity after the adjustment It is attached that the hydraulic oil that variable pump afterwards is discharged can make the pressure of the hydraulic system where it maintain specified operating pressure Closely, this demand for not only meeting executive component to the flow of hydraulic oil, and make in executive component and hydraulic system Control element can work normally under operating pressure, so as to avoid the variable pump after Displacement Regulation discharge capacity because so that liquid The hypertonia of pressure system causes the damage to executive component and control element, and avoids cannot expire because pressure is low simultaneously The requirement of sufficient executive component realization action.

It should be noted that:It has been found that whether the discharge capacity of judgment variable pump meets the needs of hydraulic system, actually It is whether the discharge capacity of judgment variable pump meets the requirement of executive component movement speed, and whether the discharge capacity of judgment variable pump meets and holds The requirement of units movement speed can be known by the actual pressure of the hydraulic oil in measuring system pipeline, work as actual pressure Compared to operating pressure hour, the discharge capacity of explanatory variable pump is smaller to provide enough hydraulic oil for the action of executive component, because This needs the discharge capacity for increasing variable pump, and when actual pressure is more than working hydraulic pressure, explanatory variable pump is supplied to hydraulic system Oily excessive, executive component does not need to so many hydraulic oil.

The disclosed hydraulic system of the present invention and the corresponding adjusting method used compared with the prior art in pass through survey The flow for measuring the hydraulic oil of the outlet of variable pump, the actual needs flow for making the flow and being calculated are compared to adjust change (method in the prior art does not consider the pressure condition of entire hydraulic system to the method for the discharge capacity of amount pump, this can cause to work as Although the discharge capacity of variable pump meets the demand of executive component action, but entire hydraulic system pressure is excessively high, causes whole system It is unstable, and be easy to damage the control elements such as such as overflow valve), the pressure of hydraulic system of the invention has preferably surely It is qualitative, and there is protective effect to executive component and control element.

Above example is only exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.

Claims (9)

1. a kind of variable pump, which is characterized in that the variable pump includes:
Shell, it is interior that there is accommodating cavity;
Stator sleeve is set in the accommodating cavity and can be moved in the accommodating cavity;
Rotor core is set in the stator sleeve and can be rotated in the stator sleeve under the driving of external impetus;
Multiple plungers, circumferential is arranged on the rotor core;
Driving mechanism comprising:
First driving portion is used to drive the stator sleeve to move linearly towards first direction;
Second driving portion is used for after first driving portion is in driving of the first direction completion to the stator sleeve, The stator sleeve is driven to be moved towards second direction.Institute's second direction is different from the second direction, and the first direction and the Two directions are perpendicular to the direction of the axis of the rotor core.
2. variable pump according to claim 1, which is characterized in that the center of circle and institute of the first direction for the stator sleeve State the line direction in the center of circle of rotor core.
3. variable pump according to claim 1, which is characterized in that the stator sleeve is directly rotatably or indirectly connects It is connected in the shell, the second direction is the rotation direction rotated around the junction of the stator sleeve and the shell.
4. the adjusting of variable pump according to claim 4, which is characterized in that first driving portion includes the first driving group With the first balance group;Second driving portion includes the second driving group and the second balance group;Wherein:
First driving group is symmetrically installed in the first balance group in the shell;
Second driving group is symmetrically installed in the second balance group in the shell;
The circumferentially position of first driving group and the circumferentially position of second driving group are in 90 °.
5. variable pump according to claim 4, which is characterized in that
The arranged on left and right sides of the shell is respectively formed with left directed cavity and right directed cavity of the perforation to the accommodating cavity;
First driving group includes being set in the left directed cavity and capable of being slided along the left directed cavity described to push against The driving piston of stator sleeve, the first spring for being set in the left directed cavity and being abutted with the driving piston;
The first balance group includes being set in the right directed cavity and capable of being slided along the right directed cavity described to push against First dummy piston of stator sleeve, is set to first dummy piston and the buckle closure at the buckle closure being fixed on the shell Between second spring, wear the buckle closure and for pushing against the second spring to adjust the adjusting screw of its compression degree.
6. variable pump according to claim 5, which is characterized in that
Articulated section is provided on the left of the stator sleeve, the articulated section is rotationally articulated in the driving by axis pin and lived Plug.
The upper and lower both sides of the shell are respectively formed with the upper straight slot for penetrating through the accommodating cavity and lower straight slot;
Second driving group includes lower holding shell, fixing body, electromagnet, deformable body, the first piston shoes, driving body;
The lower downside for keeping shell to be fixed on the shell;The fixing body is fixed in the lower holding shell, the installation The guide groove that body has mounting groove and penetrates through vertically;The electromagnet includes iron filings and the line that is wound on the iron core Circle, the electromagnet are installed in the mounting groove with the magnetic induction line of formation level;The deformable body is columned magnetic effect note Recall metal, the deformable body is vertical to be set in the guide groove, and the magnetic induction line can pass through the deformable body;The drive Kinetoplast is set to the top in the guide groove and positioned at the deformable body, after working as the deformable body by magnetic strength, the change Body increases to drive the driving body to move straight up vertically;The upper end of the tail portion and the driving body of first piston shoes Hinged, head is arranged to paste with the stator sleeve with the matched cylinder in the periphery of the stator sleeve and across the lower straight slot It is attached;
The second balance group includes upper holding shell, third spring, head cover, the second dummy piston and the second piston shoes;
The upper upside for keeping shell to be fixed on the shell, second dummy piston are set in the upper holding shell, institute It states third spring to be set in the upper holding shell and push against second dummy piston, the tail portion of second piston shoes is articulated with On second dummy piston, head be arranged to the matched cylinder in the periphery of the stator sleeve and across the upper straight slot and It is attached with the stator sleeve.
7. variable pump according to claim 6, which is characterized in that the peripheral surface of the articulated section at least circle with part Cylinder, and the diameter on the cylindrical surface is identical as the driving peripheral surface diameter of piston 42, wherein:
When first driving group moves linearly in a first direction, priming stroke that the articulated section is moved in a first direction It is at least part of in section to be located in the left guiding chamber.
8. a kind of hydraulic system, including executive component, control element, system pipeline, which is characterized in that further include such as claim Variable pump described in any one of 1 to 7.
9. hydraulic system according to claim 7, which is characterized in that be provided with pressure measurement dress on the system pipeline Set, pressure value of the variable pump measured by the device for pressure measurement come drive the stator sleeve towards first direction and/ Or second direction movement is to change the discharge capacity of the variable pump.
CN201810324716.5A 2018-04-11 2018-04-11 variable pump and hydraulic system CN108590995A (en)

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Application Number Priority Date Filing Date Title
CN201810324716.5A CN108590995A (en) 2018-04-11 2018-04-11 variable pump and hydraulic system

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747477A (en) * 1969-05-28 1973-07-24 Bosch Gmbh Robert Variable volume hydraulic apparatus
JPS5718488A (en) * 1980-07-07 1982-01-30 Nippon Jiirootaa Kk Vane pump
JPS597791A (en) * 1982-07-05 1984-01-14 Toyoda Mach Works Ltd Variable displacement type vane pump
US4496288A (en) * 1981-12-22 1985-01-29 Toyoda Koki Kabushiki Kaisha Vane type pump with a variable capacity for power steering devices
GB2126657B (en) * 1982-09-04 1985-12-18 Teves Gmbh Alfred Hydrostatic drive
JPS62294790A (en) * 1986-06-16 1987-12-22 Nachi Fujikoshi Corp Variable discharge vane pump
CN1173912A (en) * 1995-02-09 1998-02-18 罗伯特·博施有限公司 Adjustable hydrostatic pump
CN101131152A (en) * 2007-10-16 2008-02-27 天津市泽华源泵业科技发展有限公司 Constant-pressure variable radial-plunger pump

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747477A (en) * 1969-05-28 1973-07-24 Bosch Gmbh Robert Variable volume hydraulic apparatus
JPS5718488A (en) * 1980-07-07 1982-01-30 Nippon Jiirootaa Kk Vane pump
US4496288A (en) * 1981-12-22 1985-01-29 Toyoda Koki Kabushiki Kaisha Vane type pump with a variable capacity for power steering devices
JPS597791A (en) * 1982-07-05 1984-01-14 Toyoda Mach Works Ltd Variable displacement type vane pump
GB2126657B (en) * 1982-09-04 1985-12-18 Teves Gmbh Alfred Hydrostatic drive
JPS62294790A (en) * 1986-06-16 1987-12-22 Nachi Fujikoshi Corp Variable discharge vane pump
CN1173912A (en) * 1995-02-09 1998-02-18 罗伯特·博施有限公司 Adjustable hydrostatic pump
CN101131152A (en) * 2007-10-16 2008-02-27 天津市泽华源泵业科技发展有限公司 Constant-pressure variable radial-plunger pump

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Application publication date: 20180928