CN108331743A - Hydraulic plunger pumpage and alternating power control mechanism - Google Patents
Hydraulic plunger pumpage and alternating power control mechanism Download PDFInfo
- Publication number
- CN108331743A CN108331743A CN201810219199.5A CN201810219199A CN108331743A CN 108331743 A CN108331743 A CN 108331743A CN 201810219199 A CN201810219199 A CN 201810219199A CN 108331743 A CN108331743 A CN 108331743A
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- hole
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- 230000007246 mechanism Effects 0.000 title claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims description 51
- 230000033001 locomotion Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008713 feedback mechanism Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
Abstract
A kind of hydraulic plunger pumpage of present invention offer and alternating power control mechanism are equipped with hydraulic fluid port Ps, high-pressure mouth P and oil return inlet T, including：Main valve body, main valve body be equipped with along its axially through through-hole, the side of main valve body is equipped with the mounting hole being connected to through-hole；Main valve core retainer plate, main valve core retainer plate are formed as the column being coaxially disposed with through-hole and are movably located in through-hole along the axial direction of through-hole, and the side of main valve core retainer plate is equipped with connecting hole corresponding with mounting hole；Main valve plug, main valve plug are movably located at along the axial direction of through-hole in main valve core retainer plate；Shift fork, shift fork are movably located in mounting hole, and one end of shift fork is connected across mounting hole with connecting hole；Power control pilot valve, power control pilot valve are located at one end in through-hole and positioned at main valve core retainer plate, and one end of power control pilot valve is connected with one end of main valve plug to transmit power to main valve plug.The control accuracy of control mechanism according to the ... of the embodiment of the present invention, hydraulic pump variable is high, and parts are few, and difficulty of processing is low.
Description
Technical field
The present invention relates to plunger pump technique fields, more particularly, to a kind of hydraulic plunger pumpage and alternating power control
Mechanism processed.
Background technology
Displacement control and (intersection) power control are a kind of common combination control modes of hydraulic pump, and hydraulic pump can pass through
Hydraulic pilot Signal Regulation pump discharge capacity, also can restrictive pump input power.The combination control mode mainly by control into
Enter the pressure of the big servo piston chamber of plunger pump to control the variation of swashplate angle to control the discharge capacity of hydraulic pump, big servo is lived
Change in displacement is fed back to control valve by the movement of plug further through feedback mechanism, to make the oil circuit of control valve close, is reached new
Equalization point completes displacement control and power control.Existing control mechanism is complicated, is easy to happen catching phenomenon, adjusts not
It is sensitive.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art.
For this purpose, a kind of hydraulic plunger pumpage of present invention proposition and alternating power control mechanism, the hydraulic plunger pumpage
And alternating power control mechanism parts are few, difficulty of processing is low, and service life is long.
Hydraulic plunger pumpage and alternating power control mechanism according to the ... of the embodiment of the present invention, the hydraulic plunger pumpage
And alternating power control mechanism is equipped with hydraulic fluid port Ps, high-pressure mouth P and oil return inlet T, the hydraulic plunger pumpage and alternating power control
Mechanism processed includes：Main valve body, the main valve body be equipped with along its axially through through-hole, the side of the main valve body be equipped with it is described
The mounting hole of through-hole connection；Main valve core retainer plate, the main valve core retainer plate are formed as the column being coaxially disposed with the through-hole and along described
The axial direction of through-hole is movably located in the through-hole, and the side of the main valve core retainer plate is equipped with connection corresponding with the mounting hole
Hole；Main valve plug, the main valve plug are movably located at along the axial direction of the through-hole in the main valve core retainer plate；Shift fork, the shift fork
It is movably located in the mounting hole, one end of the shift fork is connected across the mounting hole with the connecting hole；Power control
Pilot valve processed, the power control pilot valve are located at one end in the through-hole and positioned at the main valve core retainer plate, the power control
One end of pilot valve processed is connected with one end of the main valve plug to transmit power to the main valve plug, and the power control pilot valve is logical
Cross drive main valve plug move left and right make to be connected to or close between the hydraulic fluid port Ps and the high-pressure mouth P and the oil return inlet T with
Displacement Regulation.
Hydraulic plunger pumpage and alternating power control mechanism according to the ... of the embodiment of the present invention, by by shift fork and main valve plug
Set is directly connected to, and main valve plug puts on not additional active force, and the movement of main valve core retainer plate and the movement of servo piston are servo-actuated close
System, had both substantially reduced the stress of shift fork, and had increased substantially the service life of shift fork in this way, also ensured the control essence of hydraulic pump variable
Degree, and the hydraulic plunger pumpage and alternating power control mechanism parts are few, and difficulty of processing is low.
Hydraulic plunger pumpage and alternating power control mechanism according to the above embodiment of the present invention can also have as follows
Additional technical characteristic：
According to one embodiment of present invention, the hydraulic plunger pumpage and alternating power control mechanism further include：The
One end cap and second end cover, the first end cover and the second end cover are respectively provided at the both ends of the main valve body；First elasticity
Part, first elastic component are located between one end of the main valve body and the first end cover, one end of first elastic component
Apply active force to the power control pilot valve；First adjusting rod, first adjusting rod coordinate with first elastic component
To adjust the telescopic level of first elastic component；Second elastic component, second elastic component are located at the another of the main valve body
Between end and the second end cover, one end of second elastic component applies active force to the main valve plug；Second adjusting rod, institute
The second adjusting rod is stated with second elastic component cooperation to adjust the telescopic level of second elastic component.
According to one embodiment of present invention, the hydraulic plunger pumpage and alternating power control mechanism further include：Bullet
Spring abutment, the spring base are movably located at along the axial direction of the through-hole in the through-hole, and institute is only supported in one end of the spring base
Main valve plug is stated, one end of second elastic component only supports the spring base and the other end only supports second adjusting rod.
According to one embodiment of present invention, second elastic component is formed as spring, one end of second elastic component
It is set on the spring base.
According to one embodiment of present invention, the spring base be equipped with first step and second step, described second
Rank is located on one end of the first step and the radial dimension of the first step is more than the radial dimension of the second step,
One end of second elastic component is set on the first step.
According to one embodiment of present invention, the hydraulic plunger pumpage and alternating power control mechanism further include：The
Three elastic components, the third elastic component are located in second elastic component, and one end of the third elastic component only supports described second
Step to the second step to apply active force；The third bullet is only supported in one end of third adjusting rod, the third adjusting rod
The other end of property part is to adjust the telescopic level of the third elastic component.
According to one embodiment of present invention, the third elastic component is formed as spring, and the third elastic component is set in
On the second step, second adjusting rod is formed as hollow columnar, and the third adjusting rod can along the axial direction of the through-hole
It is actively located in second adjusting rod.
According to one embodiment of present invention, the hydraulic plunger pumpage and alternating power control mechanism further include：Row
Control valve, the displacement control valve are located between the power control pilot valve and the first end cover, the displacement control
One end of valve is connected with the other end of the power control pilot valve to transmit power to the main valve plug, and the displacement control valve is logical
It crosses and drives the main valve plug to move left and right to make to be connected to or close between the hydraulic fluid port Ps and the high-pressure mouth P and the oil return inlet T
It closes with Displacement Regulation.
According to one embodiment of present invention, the power control pilot valve includes：Power control guide's valve pocket, the work(
Rate control pilot valve is set in the main valve body and is coaxially disposed with the through-hole；Power control pilot valve, the power
Control pilot valve is located in the power control guide valve pocket and, institute movable along the axial direction of the power control guide valve pocket
The one end for stating power control pilot valve is connected with one end of the main valve plug.
According to one embodiment of present invention, the displacement control valve includes：Displacement control valve body, the displacement control valve
Body is located between the first end cover and the main valve body；Displacement control guide sleeve, the displacement control guide sleeve are located at the discharge capacity
In application valve body, first elastic component is located in the displacement control guide sleeve.
According to one embodiment of present invention, the shift fork is rotatably provided in by fulcrum post in the mounting hole, institute
Stating shift fork can drive the main valve core retainer plate to move left and right.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of hydraulic plunger pumpage and alternating power control mechanism according to the ... of the embodiment of the present invention；
Fig. 2 is the Partial controll principle of hydraulic plunger pumpage and alternating power control mechanism according to the ... of the embodiment of the present invention
Figure；
Fig. 3 is the double pump control principle of hydraulic plunger pumpage and alternating power control mechanism according to the ... of the embodiment of the present invention
Figure.
Reference numeral：
Hydraulic plunger pumpage and alternating power control mechanism 100；
Main valve body 10；Main valve core retainer plate 20；Main valve plug 30；Shift fork 40；Fulcrum post 41；
Power control pilot valve 50；Power control guide valve pocket 51；Power control pilot valve 52；
First end cover 60；Second end cover 61；First elastic component 62；First adjusting rod 63；Second elastic component 64；Second is adjusted
Bar 65；Spring base 66；First step 661；Second step 662；Third elastic component 67；Third adjusting rod 68；
Displacement control valve 70；Displacement control valve body 71；Displacement control guide sleeve 72.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, limit
There is the feature of " first ", " second " to can explicitly or implicitly include one or more this feature surely.The present invention's
In description, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
First below hydraulic plunger pumpage according to the ... of the embodiment of the present invention and alternating power control are specifically described in conjunction with attached drawing
Mechanism 100 processed.
As shown in Figure 1, hydraulic plunger pumpage according to the ... of the embodiment of the present invention and alternating power control mechanism 100 are equipped with oil
Mouth Ps, high-pressure mouth P and oil return inlet T, wherein hydraulic plunger pumpage and alternating power control mechanism 100 include main valve body 10, master
Valve core housing 20, main valve plug 30, shift fork 40 and power control pilot valve 50.
Specifically, main valve body 10 be equipped with along its axially through through-hole, the side of main valve body 10 is equipped with and is connected to through-hole
Mounting hole, main valve core retainer plate 20 is formed as the column being coaxially disposed with through-hole and is movably located at through-hole along the axial direction of through-hole
Interior, the side of main valve core retainer plate 20 is equipped with connecting hole corresponding with mounting hole, and main valve plug 30 is movably located at along the axial direction of through-hole
In main valve core retainer plate 20, shift fork 40 is movably located in mounting hole, and one end of shift fork 40 is connected across mounting hole with connecting hole, work(
Rate control pilot valve 50 is located at one end in through-hole and positioned at main valve core retainer plate 20, one end of power control pilot valve 50 and main valve plug
30 one end is connected to transmit power to main valve plug 30, and power control pilot valve 50 makes hydraulic fluid port by driving main valve plug 30 to move left and right
It is connected to or is closed with Displacement Regulation between Ps and high-pressure mouth P and oil return inlet T.
Hydraulic plunger pumpage and alternating power control mechanism 100 according to the ... of the embodiment of the present invention as a result, by by shift fork
40 are directly connected to main valve core retainer plate 20, do not have additional active force, movement and the servo of main valve core retainer plate 20 to live on main valve core retainer plate 20
The movement of plug is relation of following up, had both substantially reduced the stress of shift fork 40 in this way, and had increased substantially the service life of shift fork 40, also ensure
The control accuracy of hydraulic pump variable, and the hydraulic plunger pumpage and 100 parts of alternating power control mechanism are few, processing
Difficulty is low.
According to one embodiment of present invention, hydraulic plunger pumpage and alternating power control mechanism 100 further include first
End cap 60 and second end cover 61, the first elastic component 62, the first adjusting rod 63, the second elastic component 64 and the second adjusting rod 65.
Specifically, first end cover 60 and second end cover 61 are respectively provided at the both ends of main valve body 10, and the first elastic component 62 is located at
Between one end and first end cover 60 of main valve body 10, one end of the first elastic component 62 is acted on to 50 application of power control pilot valve
To adjust the telescopic level of the first elastic component 62, the second elastic component 64 is set for power, the first adjusting rod 63 and the cooperation of the first elastic component 62
Between the other end and second end cover 61 of main valve body 10, one end of the second elastic component 64 applies active force to main valve plug 30, the
Two adjusting rods 65 and the cooperation of the second elastic component 64 are to adjust the telescopic level of the second elastic component 64.
As a result, by be arranged the first elastic component 62, the second elastic component 64 and respectively with the first elastic component 62 and the second bullet
Property part 64 cooperation to adjust the first adjusting rod 63 and the second adjusting rod 65 of each self extending telescopic level, can adjust as needed
Displacement control and the variable characteristics of alternating power control.
In certain specific embodiments of the invention, hydraulic plunger pumpage and alternating power control mechanism 100 also wrap
Spring base 66 is included, spring base 66 is movably located in through-hole along the axial direction of through-hole, and main valve plug 30 is only supported in one end of spring base 66,
Spring base 66 is only supported in one end of second elastic component 64 and the other end only supports the second adjusting rod 65.Preferably, 64 shape of the second elastic component
As spring, one end of the second elastic component 64 is set on spring base 66.The adjustment structure parts are few as a result, difficulty of processing
It is small and easy to assembly, reduce cost.
Preferably, according to some embodiments of the present invention, spring base 66 is equipped with first step 661 and second step 662,
Second step 662 is located on one end of first step 661 and the radial dimension of first step 661 is more than the diameter of second step 662
To size, one end of the second elastic component 64 is set on first step 661.
Further, hydraulic plunger pumpage and alternating power control mechanism 100 further include third elastic component 67 and third
Adjusting rod 68.
Specifically, third elastic component 67 is located in the second elastic component 64, and second step is only supported in one end of third elastic component 67
662 to second step 662 to apply active force, and the other end to third elastic component 67 is stopped to adjust in one end of third adjusting rod 68
The telescopic level of third elastic component 67.
It is special come the variable for adjusting displacement control and alternating power control as needed by the cooperation of three elastic components as a result,
Property, control accuracy can be further increased.
In certain specific embodiments of the invention, third elastic component 67 is formed as spring, and third elastic component 67 is arranged
On second step 662, the second adjusting rod 65 is formed as hollow columnar, and third adjusting rod 68 is movably set along the axial direction of through-hole
In the second adjusting rod 65.The adjustment structure can rationally control parts on the basis of improving control accuracy as a result,
Number, effective control cost.
According to one embodiment of present invention, hydraulic plunger pumpage and alternating power control mechanism 100 further include discharge capacity
Control valve 70, displacement control valve 70 are located between power control pilot valve 50 and first end cover 60, one end of displacement control valve 70
It is connected with the other end of power control pilot valve 50 to transmit power to main valve plug 30, displacement control valve 70 is by driving main valve plug 30
Moving left and right makes to be connected to or closed with Displacement Regulation between hydraulic fluid port Ps and high-pressure mouth P and oil return inlet T.
Specifically, power control pilot valve 50 includes power control guide valve pocket 51 and power control pilot valve 52,
In, power control guide valve pocket 51 is located in main valve body 10 and is coaxially disposed with through-hole, and power control pilot valve 52 is located at work(
Rate controls in guide's valve pocket 51 and, one end of power control pilot valve 52 movable along the axial direction of power control guide valve pocket 51
It is connected with one end of main valve plug 30.
Further, displacement control valve 70 includes displacement control valve body 71 and displacement control guide sleeve 72.Wherein, displacement control
Valve body 71 is located between first end cover 60 and main valve body 10, and displacement control guide sleeve 72 is located in displacement control valve body 71, the first bullet
Property part 62 is located in displacement control guide sleeve 72.
Hydraulic plunger pumpage and alternating power control mechanism 100 according to the ... of the embodiment of the present invention as a result, displacement control with
Power control is controlled by the same main valve plug 30, and the complexity of control valve arrangement is enormously simplified, and installation is simple, adjusts
Examination is safeguarded simple.And the control mechanism can use on singly pump, can also be used on double pump, have friendship when being used on double pump
Pitch the function of power control.
Optionally, according to another embodiment of the invention, shift fork 40 is rotatably provided in mounting hole by fulcrum post 41
Interior, shift fork 40 can drive main valve core retainer plate 20 to move left and right.
Hydraulic plunger pumpage according to the ... of the embodiment of the present invention and alternating power control are specifically described with reference to Fig. 2 and Fig. 3
The operation principle of mechanism 100 processed：
When hydraulic plunger pumpage according to the ... of the embodiment of the present invention and alternating power control mechanism 100 are located at original state
When：The main valve plug 30 of control valve is in displacement control guide sleeve 72, the first elastic component 62, power control guide valve pocket 51, power control
Initial equilibrium conditions are under the action of pilot valve 52, the second elastic component 64, big servo piston cavity pressure Ps passes through control at this time
The opening of valve core processed is connected with T mouthfuls (drain tap), and the swashplate angle pumped after pump startup is in maximum pump discharge state (at this time without row
Measure pilot control signal).
Reduce discharge capacity to adjust：When there is discharge capacity pilot control pressure, with the increase of pressure, hydraulic action overcomes first
The spring force of elastic component 62 pushes displacement control guide sleeve 72 to move right, can lead to while displacement control guide sleeve 72 moves right
Overpower controls guide's valve pocket 51, power control pilot valve 52, passes motion to main valve plug 30, at this time big servo piston chamber
It is gradually turned on P mouthfuls of (pump discharge) oil circuits, big servo piston chamber is gradually switched off with oil return opening oil circuit, and big servo piston cavity pressure is opened
Begin to increase, swashplate angle is made to reduce, big servo piston can drive main valve core retainer plate 20 to move right by shift fork, to make big servo
Piston cavity pressure Ps is cut off with P mouthfuls of oil circuits, reaches new equilibrium state, is reduced discharge capacity and is adjusted completion.
Increase discharge capacity to adjust；When pump is in a certain displacement condition, with the reduction of displacement control pilot control pressure, liquid
Press active force less than the resultant force of the first elastic component 62, the spring force of the second elastic component 64, displacement control guide sleeve 72 moves downward, and arranges
Amount control guide sleeve 72 can be passed movement by power control guide valve pocket 51, power control pilot valve 52 while moving downward
Main valve plug 30 is passed, big servo piston chamber is gradually cut off with P mouthfuls of (pump discharge) oil circuits at this time, and big servo piston chamber (is let out with T mouthfuls
Hydraulic fluid port) oil circuit is gradually connected, and big servo piston cavity pressure starts to reduce, and swashplate angle is made to increase, and big servo piston can be by dialling
Fork pushes main valve core retainer plate 20 to move downward, and to make big servo piston cavity pressure Ps be cut off with T mouthfuls of (drain tap) oil circuits, reaches new
Equilibrium state, discharge capacity increase adjust complete.
Power control is adjusted：With the increase of pump discharge pressure, the hydraulic action of power control pilot valve 52 is acted on
Power gradually increases, and hydraulic action overcomes the spring force of the second elastic component 64 that main valve plug 30 is pushed to move right, at this time big servo
Plunger shaft is gradually cut off with T mouthfuls of (oil return opening) oil circuits, and big servo piston chamber is gradually connected with P mouthfuls of (pump discharge) oil circuits, watches greatly
It takes piston cavity pressure to start to increase, swashplate angle is made to reduce, big servo piston can drive main valve core retainer plate 20 to transport to the right by shift fork
It is dynamic, to make big servo piston cavity pressure Ps gradually be cut off with pump discharge pressure, reach new equilibrium state, with the liter of pressure
The discharge capacity of height, pump is gradually reduced, to keep the power of pump constant.Conversely, when the outlet pressure of pump declines, then power control
The meeting left-hand movement of pilot valve 52, to make main valve core retainer plate 20, also left-hand moves, and increases the discharge capacity of pump so that the power of pump is kept
It is constant.
Alternating power controls to adjust and automatically controlled power regulation：As shown in Figures 2 and 3, when liquid according to the ... of the embodiment of the present invention
When hydraulic plunger pump discharge capacity and alternating power control mechanism 100 are applied to double pump, wherein to pump 1 shown in the left side in Fig. 3, the right
Shown in for pump 2, have three-level effect step A1, A2, A3 in power control pilot valve 52, first step A1 is 1 outlet pressure of pump
The effect step of power, second step A2 are the effect step for pumping 2 outlet pressures, and third step A3 is the effect of pilot control pressure
Step.The hydraulic action for acting on power valve pilot valve is the resultant force of the hydraulic action on these three steps.Pump 1 goes out
Mouth pressure can influence the power of pump 2, pump 2 outlet pressure and can also influence to pump 1 power, as alternating power controls.With work
Hydraulic action for power valve pilot valve 52 increases, and hydraulic action overcomes the spring force of the second elastic component 64 to push master
Spool 30 moves right, and big servo piston chamber is gradually cut off with T mouthfuls of (oil return opening) oil circuits at this time, big servo piston chamber with P mouthfuls
(pump discharge) oil circuit is gradually connected, and big servo piston cavity pressure starts to increase, and swashplate angle is made to reduce, and big servo piston can pass through
Shift fork drives main valve core retainer plate 20 to move right, and to make big servo piston cavity pressure Ps gradually be cut off with pump discharge pressure, reaches
New equilibrium state, with the raising of pressure, the discharge capacity of pump is gradually reduced, to keep the power of pump constant.Conversely, when pump
When outlet pressure declines, then the meeting of power control pilot valve 52 left-hand movement, to make main valve core retainer plate 20, also left-hand moves, and increases
The discharge capacity of pump so that the power of pump remains unchanged.When solenoid valve obtains it is electric when, the hydraulic pressure for acting on power valve pilot valve can be changed
Active force, to change set value of the power.
To sum up, hydraulic plunger pumpage according to the ... of the embodiment of the present invention and alternating power control mechanism 100, part
Few, difficulty of processing is low；Big servo piston is connect by shift fork 40 with main valve core retainer plate 20, and displacement feedback mechanism is simple, the reality of pump
Displacement feedback precision is higher；There are three adjustable springs on control valve, can Displacement Regulation control according to actual needs variable it is special
Property, the control characteristic of power.Shift fork 40 is directly connected to main valve core retainer plate 20, without additional active force, the movement of valve pocket on valve pocket
Movement with servo piston is relation of following up, had both substantially reduced the stress of shift fork in this way, and had increased substantially the service life of shift fork,
It ensure that the control accuracy of hydraulic pump variable.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (11)
1. a kind of hydraulic plunger pumpage and alternating power control mechanism, the hydraulic plunger pumpage and alternating power control machine
Structure is equipped with hydraulic fluid port Ps, high-pressure mouth P and oil return inlet T, which is characterized in that the hydraulic plunger pumpage and alternating power control mechanism
Including：
Main valve body, the main valve body be equipped with along its axially through through-hole, the side of the main valve body is equipped with and the through-hole connects
Logical mounting hole；
Main valve core retainer plate, the main valve core retainer plate are formed as the column being coaxially disposed with the through-hole and can live along the axial direction of the through-hole
It is located at dynamicly in the through-hole, the side of the main valve core retainer plate is equipped with connecting hole corresponding with the mounting hole；
Main valve plug, the main valve plug are movably located at along the axial direction of the through-hole in the main valve core retainer plate；
Shift fork, the shift fork are movably located in the mounting hole, one end of the shift fork pass through the mounting hole with it is described
Connecting hole is connected；
Power control pilot valve, the power control pilot valve are located at one end in the through-hole and positioned at the main valve core retainer plate,
One end of the power control pilot valve is connected with one end of the main valve plug to transmit power, the power control to the main valve plug
Pilot valve processed is made by driving the main valve plug to move left and right between the hydraulic fluid port Ps and the high-pressure mouth P and the oil return inlet T
Connection is closed with Displacement Regulation.
2. hydraulic plunger pumpage according to claim 1 and alternating power control mechanism, which is characterized in that further include：
First end cover and second end cover, the first end cover and the second end cover are respectively provided at the both ends of the main valve body；
First elastic component, first elastic component are located between one end of the main valve body and the first end cover, and described first
One end of elastic component applies active force to the power control pilot valve；
First adjusting rod, first adjusting rod coordinate with first elastic component to adjust the flexible journey of first elastic component
Degree；
Second elastic component, second elastic component are located between the other end of the main valve body and the second end cover, and described
One end of two elastic components applies active force to the main valve plug；
Second adjusting rod, second adjusting rod coordinate with second elastic component to adjust the flexible journey of second elastic component
Degree.
3. hydraulic plunger pumpage according to claim 2 and alternating power control mechanism, which is characterized in that further include：
Spring base, the spring base are movably located at along the axial direction of the through-hole in the through-hole, one end of the spring base
The main valve plug is only supported, one end of second elastic component only supports the spring base and the other end only supports second adjusting rod.
4. hydraulic plunger pumpage according to claim 3 and alternating power control mechanism, which is characterized in that described second
Elastic component is formed as spring, and one end of second elastic component is set on the spring base.
5. hydraulic plunger pumpage according to claim 4 and alternating power control mechanism, which is characterized in that the spring
Seat is equipped with first step and second step, and the second step is located on one end of the first step and the first step
Radial dimension be more than the second step radial dimension, one end of second elastic component is set in the first step
On.
6. hydraulic plunger pumpage according to claim 5 and alternating power control mechanism, which is characterized in that further include：
Third elastic component, the third elastic component are located in second elastic component, and institute is only supported in one end of the third elastic component
Second step is stated to apply active force to the second step；
Stop the other end to the third elastic component to adjust the third bullet in one end of third adjusting rod, the third adjusting rod
The telescopic level of property part.
7. hydraulic plunger pumpage according to claim 6 and alternating power control mechanism, which is characterized in that the third
Elastic component is formed as spring, and the third elastic component is set on the second step, and second adjusting rod is formed as hollow
Column, the third adjusting rod are movably located at along the axial direction of the through-hole in second adjusting rod.
8. hydraulic plunger pumpage according to claim 2 and alternating power control mechanism, which is characterized in that further include：
Displacement control valve, the displacement control valve are located between the power control pilot valve and the first end cover, the row
One end of control valve is connected with the other end of the power control pilot valve to transmit power, the discharge capacity control to the main valve plug
Valve processed makes to be connected between the hydraulic fluid port Ps and the high-pressure mouth P and the oil return inlet T by driving the main valve plug to move left and right
Or it closes with Displacement Regulation.
9. hydraulic plunger pumpage according to claim 8 and alternating power control mechanism, which is characterized in that the power
Controlling pilot valve includes：
Power control guide's valve pocket, the power control pilot valve are set in the main valve body and are coaxially set with the through-hole
It sets；
Power control pilot valve, the power control pilot valve are located in the power control guide valve pocket and along the work(
The axial direction that rate controls guide's valve pocket is movable, and one end of the power control pilot valve is connected with one end of the main valve plug.
10. hydraulic plunger pumpage according to claim 8 and alternating power control mechanism, which is characterized in that the row
Control valve includes：
Displacement control valve body, the displacement control valve body are located between the first end cover and the main valve body；
Displacement control guide sleeve, the displacement control guide sleeve are located in the displacement control valve body, and first elastic component is located at institute
It states in displacement control guide sleeve.
11. hydraulic plunger pumpage according to claim 1 and alternating power control mechanism, which is characterized in that described group
Fork is rotatably provided in by fulcrum post in the mounting hole, and the shift fork can drive the main valve core retainer plate to move left and right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219199.5A CN108331743A (en) | 2018-03-16 | 2018-03-16 | Hydraulic plunger pumpage and alternating power control mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219199.5A CN108331743A (en) | 2018-03-16 | 2018-03-16 | Hydraulic plunger pumpage and alternating power control mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108331743A true CN108331743A (en) | 2018-07-27 |
Family
ID=62931163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810219199.5A Pending CN108331743A (en) | 2018-03-16 | 2018-03-16 | Hydraulic plunger pumpage and alternating power control mechanism |
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| Country | Link |
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| CN (1) | CN108331743A (en) |
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| CN109779871A (en) * | 2019-02-28 | 2019-05-21 | 王湫锂 | A kind of fluid power injection device and application thereof |
| CN110307143A (en) * | 2019-06-21 | 2019-10-08 | 江苏恒立液压科技有限公司 | A kind of variable servo valve, power servo valve and variable pump |
| CN113757099A (en) * | 2021-09-07 | 2021-12-07 | 江苏汇智高端工程机械创新中心有限公司 | Control valve for electric control plunger pump |
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