CN108775431A - Balanced valve - Google Patents
Balanced valve Download PDFInfo
- Publication number
- CN108775431A CN108775431A CN201810963247.1A CN201810963247A CN108775431A CN 108775431 A CN108775431 A CN 108775431A CN 201810963247 A CN201810963247 A CN 201810963247A CN 108775431 A CN108775431 A CN 108775431A
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- China
- Prior art keywords
- hole
- section
- valve pocket
- valve
- valve core
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
- F16K17/065—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure with differential piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
The present invention proposes a kind of balanced valve, including：Valve pocket, end plug, balance valve core, plunger, piston, the first spring, the first baffle ring, spring base, nonreturn valve core, second spring.Balanced valve according to the ... of the embodiment of the present invention, processing is simple, and area of passage is without mutation, energy saving.
Description
Technical field
The present invention relates to a kind of valve modules of hydraulic device, relate in particular to a kind of balanced valve.
Background technology
In the mechanical equipments such as modern engineering machinery, building machinery, raising hydraulic circuit, wherein balanced valve have been widely applied
It is the key that hydraulic cylinder work Hydraulic Elements, the quality for balancing valve performance directly affect the property of host in control hoisting circuit
Energy.Existing such a disadvantage of hydraulically balanced valve generally existing：When loading decentralization, due to hydraulically balanced valve valve port flow-passing surface
The characteristics of product will produce mutation can make load generate the phenomenon that low-frequency jitter is with impact, cause system unstable, influence complete machine
Security reliability.When load decentralization and load rise by be same valve port, can all generate restriction effect, and load in practice
Throttling action is not needed when rising, seriously affects the efficiency of operation；A check valve in parallel, nothing are needed in order to solve the problems, such as this also
Expense is increased in shape.The spring setting pressure of balanced valve is constant, is opened for different load behavior balanced valves is reversed
It is changeless to open pressure all, needs the control pressure of opening balanced valve and load higher for loading lower operating mode in this way
Operating mode be the same, will produce prodigious energy loss in this way, it is not energy-efficient.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of processing is simple, area of passage is without mutation, energy-efficient balance
Valve.
Balanced valve according to the ... of the embodiment of the present invention, including：
Valve pocket, it includes the first valve pocket from top to bottom that the valve pocket, which has valve pocket through-hole up and down, the valve pocket through-hole,
Through hole section, the second valve pocket through hole section, third valve pocket through hole section and the 4th valve pocket through hole section, the hole of the first valve pocket through hole section
Diameter is more than the aperture of the 4th valve pocket through hole section, and the aperture of the 4th valve pocket through hole section is more than the second valve pocket through hole section
Aperture, the aperture of the second valve pocket through hole section is more than the aperture of the third valve pocket through hole section, has on the valve pocket outer
Opening is respectively positioned on first flow, throttle orifice and through flow hole on the periphery wall of the valve pocket, the inner opening position of the first flow
In on the internal perisporium of the second valve pocket through hole section and the terrace of appearing on the stage of the neighbouring third valve pocket through hole section, the throttle orifice
Inner opening is located on the internal perisporium of the third valve pocket through hole section, and the inner opening of the through flow hole is located at the 4th valve pocket through-hole
Leave from office terrace on the internal perisporium of section and adjacent to the third valve pocket through hole section, wherein the outward opening of the first flow is constituted
The outward opening of first hydraulic fluid port, the outward opening of the throttle orifice and the through flow hole constitutes the second hydraulic fluid port；
End plug, the end plug are located at the upper opening for closing the valve pocket through-hole on the valve pocket；
Balance valve core, the balance valve core include the first balance compatible with the first valve pocket through hole section from top to bottom
It spool section, the second balance valve core section compatible with the second valve pocket through hole section and is mutually fitted with the third valve pocket through hole section
The third balance valve core section matched, the first balance valve core section can coordinate up or down in the first valve pocket through-hole, institute
Cooperation can be slided up and down in the second valve pocket through-hole by stating the second balance valve core section, and the third balance valve core section can be upper and lower
It is fitted slidably in the third valve pocket through hole section, the balance valve core has balance valve core through-hole up and down, described
Balance valve core through-hole include be located at the first balance valve core section on and the second balance valve core section on upper through hole section and
The aperture of lower through-hole section in the third balance valve core section, the upper through hole section is less than the third valve pocket through hole section
Aperture, the aperture of the lower through-hole section is less than the aperture of the upper through hole section, on the periphery wall of the second balance valve core section
It is formed with the first control chamber compatible with the inner opening of the first flow；
Plunger, the plunger is fixedly linked with the end plug and the lower end of the plunger extends downwardly into the valve pocket through-hole simultaneously
It is plugged in the upper through hole section so that the balance valve core can be slided up and down relative to the plunger, has on the plunger and open
The downward plunger blind hole of mouth, the bottom surface of the plunger blind hole are located on the upper surface of the end plug, and the plunger blind hole is opened
Mouth end has damping hole；
Piston, the piston include the glissile segment being socketed on the plunger and the backstop on the glissile segment
Section, the internal perisporium of the glissile segment can slide up and down to be connected and the periphery wall of the glissile segment can with the periphery wall of the plunger
Slide up and down to and be connected with the internal perisporium of the first valve hole section, the internal diameter of the backstop section is more than the outer diameter of the plunger
And the outer diameter of the backstop section is less than the internal diameter of the first valve hole section, has described in connection on the side wall of the backstop section
The periphery wall of backstop section and the piston through flow hole of internal perisporium, have on the side wall of the plunger be connected to the periphery wall of the plunger with
The plunger through flow hole of the plunger blind hole, the plunger through flow hole are located at the upper surface of described glissile segment；
First spring, first spring are socketed on the plunger, and the upper end of first spring is against the sliding
Section lower face and first spring lower end against the upper surface of the first balance valve core section, first spring is upward
The piston is often pushed so that the upper surface of the backstop section is against the lower face of the end plug, first spring often pushes away downwards
Move the balance valve core so that the second balance valve core section lower face against the third valve pocket through hole section terrace of appearing on the stage,
At this point, the lower end of the third balance valve core section extends downwardly into the 4th valve pocket through hole section, in the first valve pocket through hole section
It is interior, it is limited between the upper surface of the periphery wall of the plunger, the lower face of the main paragraph and the first balance valve core section
There is the second control chamber, on the side wall of the valve pocket there is second flow channel, the outward opening of the second flow channel to be located at the valve pocket
On periphery wall and the inner opening of the second flow channel is connected to second control chamber, and the outward opening of the second flow channel constitutes third
Hydraulic fluid port；
First baffle ring, first baffle ring are fixedly attached on the plunger and below the pistons；
Spring base, the spring base fixation are located in the 4th valve pocket through hole section；
Nonreturn valve core, the nonreturn valve core include the main body that can slide up and down to cooperation in the 4th valve pocket through hole section
Section and below the main paragraph and undergauge section of the cooperation in the spring base, the nonreturn valve core can be slided up and down to
The upper nonreturn valve core through-hole having up and down, the aperture of the nonreturn valve core through-hole are less than the hole of the third valve pocket through hole section
The lower end in diameter and the aperture for being more than the upper through hole section, the nonreturn valve core through-hole constitutes the 4th hydraulic fluid port；
Second spring, the second spring are socketed in the undergauge section, and the upper end of the second spring is against the master
The lower face of the body section and lower end of the second spring is against the spring base, the second spring often push described unidirectional upwards
Spool is so that the through flow hole is closed in the upper surface of the nonreturn valve core against the lower face of the third balance valve core section；
It is S1 to enable the axial cross section of the nonreturn valve core through-hole accumulate, the axial cross section of upper through hole section product is S2, described
The axis sectional area of first valve pocket through hole section is S3, the axial cross section of the second valve pocket through hole section product is S4, then S1, S2, S3
Meet (S3-S2)/(S1-S2)=1.3, and (S4-S1)/(S1-S2) > 3 between S4.
Advantageously, the balanced valve further includes the second baffle ring, and second baffle ring is embedded in the 4th valve pocket through-hole
With the fixation spring base on the inner wall of section.
Advantageously, the throttle orifice has multi-turn along the axial arranged of the third valve pocket through hole section, often has along institute on circle
State multiple throttle orifices of the circumferential uniform intervals arrangement of third valve pocket through hole section.
Advantageously, the end plug is connect with the threaded upper ends of the valve pocket through-hole.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Fig. 1 is the structural schematic diagram of balanced valve according to an embodiment of the invention；
Fig. 2 is the hydraulic schematic diagram of balanced valve according to an embodiment of the invention；
Fig. 3 is a kind of hydraulic schematic diagram of application scenarios of balanced valve according to an embodiment of the invention.
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, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is described in detail a kind of balanced valve according to the ... of the embodiment of the present invention.
As shown in Figure 1 to Figure 3, balanced valve according to the ... of the embodiment of the present invention, including：Valve pocket 1, end plug 2, balance valve core 3, column
Plug 4, piston 5, the first spring 6, the first baffle ring 7, spring base 8, nonreturn valve core 9, second spring 10.
Valve pocket 1 has a valve pocket through-hole up and down, and the valve pocket through-hole includes the first valve pocket through hole section, the from top to bottom
Two valve pocket through hole sections, third valve pocket through hole section and the 4th valve pocket through hole section.The aperture of the first valve pocket through hole section is more than institute
The aperture of the 4th valve pocket through hole section is stated, the aperture of the 4th valve pocket through hole section is more than the aperture of the second valve pocket through hole section,
The aperture of the second valve pocket through hole section is more than the aperture of the third valve pocket through hole section.It is respectively positioned on outward opening on valve pocket 1
First flow 101, throttle orifice 102 on the periphery wall of the valve pocket and through flow hole 103.The inner opening of first flow 101 is located at
On the internal perisporium of the second valve pocket through hole section and the terrace of appearing on the stage of the neighbouring third valve pocket through hole section, throttle orifice 102 it is interior
For opening on the internal perisporium of the third valve pocket through hole section, the inner opening of through flow hole 103 is located at the 4th valve pocket through hole section
Internal perisporium on and the neighbouring third valve pocket through hole section leave from office terrace.Wherein, the outward opening of first flow 101 constitutes first
Hydraulic fluid port X, the outward opening of throttle orifice 102 and the outward opening of through flow hole 103 constitute the second hydraulic fluid port V.Advantageously, throttle orifice 102 is along institute
Stating the axial arranged of third valve pocket through hole section has multi-turn, often has the circumferential uniform intervals along the third valve pocket through hole section on circle
Multiple throttle orifices 102 of arrangement.
End plug 2 is located at the upper opening for closing the valve pocket through-hole on valve pocket 1.Advantageously, end plug 2 and the valve pocket are logical
The threaded upper ends in hole connect.
Balance valve core 3 includes the first balance valve core section compatible with the first valve pocket through hole section and institute from top to bottom
It states the compatible second balance valve core section of the second valve pocket through hole section and third compatible with the third valve pocket through hole section is flat
Weigh spool section.The first balance valve core section can coordinate up or down (to be moved up and down in the first valve pocket through-hole and refers to
Do not contacted between relevant two components, similarly hereinafter), the second balance valve core section can slide up and down to cooperation in second valve
It covers in through-hole (it refers to that relevant two components are in contact to slide up and down, similarly hereinafter), the third balance valve core section can slide up and down
Ground coordinates in the third valve pocket through hole section.The balance valve core has balance valve core through-hole 301 up and down, balanced valve
Core through-hole 301 includes the upper through hole section being located in the first balance valve core section and in the second balance valve core section and is located at
Lower through-hole section in the third balance valve core section, the aperture of the upper through hole section are less than the hole of the third valve pocket through hole section
Diameter, the aperture of the lower through-hole section are less than the aperture of the upper through hole section.The shape on the periphery wall of the second balance valve core section
The compatible first control chamber 1a of inner opening of Cheng Youyu first flows 101.
Plunger 4 is fixedly linked with end plug 2 and the lower end of plunger 2 extends downwardly into the valve pocket through-hole and is plugged on described logical
So that balance valve core 3 can be slided up and down relative to plunger 2 in hole section.There is the plunger blind hole 401 that Open Side Down, column on plunger 4
The bottom surface of plug blind hole 401 is located on the upper surface of end plug 2, and the open end of plunger blind hole 401 has damping hole 402.
Piston 5 includes being socketed in the glissile segment on plunger 4 and the backstop section on the glissile segment.The sliding
The internal perisporium of section can slide up and down to be connected and the periphery wall of the glissile segment can slide up and down to and institute with the periphery wall of plunger 4
The internal perisporium for stating the first valve hole section is connected.The internal diameter of the backstop section is more than the outer of the outer diameter of plunger 4 and the backstop section
Diameter is less than the internal diameter of the first valve hole section.Have on the side wall of the backstop section be connected to the periphery wall of the backstop section with
The piston through flow hole 501 of internal perisporium, the periphery wall on the side wall of plunger 4 with connection plunger 4 and the plunger of plunger blind hole 401 are logical
Discharge orifice 403, plunger through flow hole 403 are located at the upper surface of described glissile segment.
First spring 6 is socketed on plunger 4, and the upper end of the first spring 6 is against the lower face of the glissile segment and the first bullet
The lower end of spring 6 is against the upper surface of the first balance valve core section.First spring 6 often pushes piston 5 so that the backstop upwards
The upper surface of section is against the lower face of end plug 2.First spring 6 often pushes balance valve core 3 so that second balance valve core downwards
Appear on the stage terrace of the lower face of section against the third valve pocket through hole section.At this point, the lower end of the third balance valve core section is downward
Stretch into the 4th valve pocket through hole section.In the first valve pocket through hole section, the periphery wall of plunger 4, the main paragraph lower end
The second control chamber 1b is defined between face and the upper surface of the first balance valve core section, has second on the side wall of valve pocket 1
The outward opening of runner 104, second flow channel 104 is located on the periphery wall of valve pocket 1 and the first control of the inner opening of second flow channel 104 connection
The outward opening of chamber 1b processed, second flow channel 104 constitute third hydraulic fluid port T.
First baffle ring 7 is fixedly attached on plunger 4 and below piston 5, to be limited to moving down for piston 5.
The fixation of spring base 8 is located in the 4th valve pocket through hole section.Advantageously, the balanced valve further includes the second baffle ring
11, the second baffle ring is embedded on the inner wall of the 4th valve pocket through hole section with fixed spring seat 8.
Nonreturn valve core 9 includes that can slide up and down to main paragraph of the cooperation in the 4th valve pocket through hole section and be located at institute
It states below main paragraph and undergauge section of the cooperation in the spring base can be slided up and down to.Have up and down on nonreturn valve core 9
Nonreturn valve core through-hole 901, the aperture of nonreturn valve core through-hole 901 is less than the aperture of the third valve pocket through hole section and more than described
The lower end in the aperture of upper through hole section, nonreturn valve core through-hole 901 constitutes the 4th hydraulic fluid port C.
Second spring 10 is socketed in the undergauge section, the upper end of second spring 10 against the lower face of the main paragraph and
The lower end of second spring 10 against spring base 8, second spring 10 often push nonreturn valve core 9 upwards so that nonreturn valve core 9 upper end
Through flow hole 103 is closed against the lower face of the third balance valve core section in face.
It is S1 to enable the axial cross section of the nonreturn valve core through-hole accumulate, the axial cross section of upper through hole section product is S2, described
The axis sectional area of first valve pocket through hole section is S3, the axial cross section of the second valve pocket through hole section product is S4, then S1, S2, S3
Meet (S3-S2)/(S1-S2)=1.3, and (S4-S1)/(S1-S2) > 3 between S4.
The unlatching setting pressure of balance valve core 3 is set automatically by the pressure of the 4th hydraulic fluid port C, in Maximum safe pressure model
In enclosing, the Opening pressure of balance valve core 3 is 1.3 times of the 4th hydraulic fluid port C pressure always.This is because the 4th hydraulic fluid port C pressure is made
It is S1-S2 with upward force action area on balance valve core 3, and the 4th hydraulic fluid port C is acted on piston 5 to the first spring 6
The active area of the resultant force of generation is S3-S2, and (S3-S2)/(S1-S2)=1.3, thus the first spring 6 set pressure as
1.3 times of 4th hydraulic fluid port C pressure, while when the 4th hydraulic fluid port C is more than certain pressure, piston 5 can move to lower end and first gear
7 contact of circle, reaches maximum set pressure, that is, Maximum safe pressure at this time.Such benefit is, when the 4th hydraulic fluid port C pressure
When relatively low, such as the 4th hydraulic fluid port C pressure is 5MPA, then the unlatching pressure of compression the first spring 6 setting is moved downward by piston 5
Power is 6.5MPA, and the pressure of the first hydraulic fluid port X needs to reach 6.5MPA/ hydraulic control ratios at this time, you can balance valve core 3 is upwardly opened,
The ratio of hydraulic control herein is constant=(S4-S1)/(S1-S2) > 3；It is when the 4th hydraulic fluid port C pressure is 20MPA, then downward by piston 3
As 26MPA, the pressure of the first hydraulic fluid port X needs to reach 26MPA/ hydraulic control ratios the Opening pressure that the first spring of motion compresses 5 is set, can
Balance valve core 3 to be upwardly opened.As can be seen from the above when loading smaller, the present invention can reduce the pressure of the first hydraulic fluid port X
Power, no matter load Opening pressure is fixed unlike the prior art, can reach energy-efficient effect in this way.
It following is a brief introduction of the course of work of balanced valve according to the ... of the embodiment of the present invention.
As shown in figure 3, in application, the second hydraulic fluid port V is connected with an actuator port A of reversal valve 12, by the first hydraulic fluid port X
It is connected with another actuator port B of reversal valve 12 with the rod chamber of hydraulic cylinder 13, by the nothing of the 4th hydraulic fluid port C and hydraulic cylinder 13
Rod cavity is connected, and third hydraulic fluid port T is connected with fuel tank 14.
(1) uphill process, the pressure oil that the pressure oil of reversal valve 12 reaches the second hydraulic fluid port V, the second hydraulic fluid port V of balanced valve are logical
Crossing through flow hole 103 pushes nonreturn valve core 9 to move downward the active force opening valve port for overcoming second spring 10, and oil is through the second hydraulic fluid port V
It flows into the 4th hydraulic fluid port C and reaches 13 rodless cavity of hydraulic cylinder, push 13 uplink of hydraulic cylinder.This stage fluid flows into the by the second hydraulic fluid port V
Four hydraulic fluid port C do not have throttling action.
(2) during declining, reversal valve 12 commutates, and the pressure oil of the first hydraulic fluid port X enters control chamber 1a and is applied to balance
On spool 3, the active force of the first spring 6, balance valve core 3 is overcome to move up, first opens conical surface seal face, at the same nonreturn valve core 9 to
It is upper to move the leave from office terrace for arriving to the third valve pocket through hole section, separate through flow hole 103 and the 4th hydraulic fluid port C.First hydraulic fluid port X pressure
Increasing, balance valve core 3 just moves up further, each throttle orifice 102 covered in by third balance valve core section before gradually exposing,
Area of passage is that mitigation is increased in this way, and load lowering velocity can be precisely controlled.The gradual change of area of passage is to pass through brill
Hole is gradually linked up to realize, processing cost is low to be easy to control.
(3) stopped process, the first hydraulic fluid port X pressure reductions, the first spring 6 push balance valve core 3 to move down, and area of passage is gradual
It reduces, valve port is shut.
(4) in stopped process, since when outer force effect, which makes load pressure generate, impacts larger, piston 5 has moved
To most descending place to be limited by the first baffle ring 7, the first spring 6 reaches maximum set pressure, and the 4th hydraulic fluid port C pressure hydraulic oil is applied to flat
It weighs on the annular active area (S1-S2) of spool 3, if surge is more than the active force of the first spring 6, balance valve core 3 will
Throttle orifice 102 is quickly opened, compression shock buffering is fallen.
That is, (1) throttle orifice 102 has multi-turn along the axial arranged of the third valve pocket through hole section, often have on circle
The multiple throttle orifices 102 arranged along the circumferential uniform intervals of the third valve pocket through hole section, when balance valve core 3 is moved upwards valve
When mouth is opened, these throttle orifices 102 can be opened successively, configured by rational pore size and axially spaced-apart, it can be accurate
Area of passage variation is controlled, to accurate flow control.(2) load rise when by be through flow hole 102,9 and of nonreturn valve core
Valve port between balance valve core 3；Load decline when by be balance valve core 3, throttle orifice 102；Speed when load rises in this way
Degree is unaffected, and can control decrease speed by throttling when declining.
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, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is two or more, unless separately
There is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are within the scope of the invention to above-mentioned implementation
Example is changed, changes, replacing and modification, each falls within protection scope of the present invention.
Claims (4)
1. a kind of balanced valve, which is characterized in that including：
Valve pocket, it includes the first valve pocket through-hole from top to bottom that the valve pocket, which has valve pocket through-hole up and down, the valve pocket through-hole,
Section, the second valve pocket through hole section, third valve pocket through hole section and the 4th valve pocket through hole section, the aperture of the first valve pocket through hole section are big
In the aperture of the 4th valve pocket through hole section, the aperture of the 4th valve pocket through hole section is more than the hole of the second valve pocket through hole section
Diameter, the aperture of the second valve pocket through hole section are more than the aperture of the third valve pocket through hole section, have outward opening on the valve pocket
The inner opening of first flow, throttle orifice and the through flow hole being respectively positioned on the periphery wall of the valve pocket, the first flow is located at institute
It states on the internal perisporium of the second valve pocket through hole section and the terrace of appearing on the stage of the neighbouring third valve pocket through hole section, the interior of the throttle orifice is opened
Mouth is located on the internal perisporium of the third valve pocket through hole section, and the inner opening of the through flow hole is located at the 4th valve pocket through hole section
Leave from office terrace on internal perisporium and adjacent to the third valve pocket through hole section, wherein the outward opening of the first flow constitutes first
The outward opening of hydraulic fluid port, the outward opening of the throttle orifice and the through flow hole constitutes the second hydraulic fluid port；
End plug, the end plug are located at the upper opening for closing the valve pocket through-hole on the valve pocket；
Balance valve core, the balance valve core include the first balance valve core compatible with the first valve pocket through hole section from top to bottom
Section, the second balance valve core section compatible with the second valve pocket through hole section and compatible with the third valve pocket through hole section
Third balance valve core section, the first balance valve core section can coordinate up or down in the first valve pocket through-hole, and described
Two balance valve core sections can slide up and down to cooperation in the second valve pocket through-hole, and the third balance valve core section can slide up and down
Ground coordinates in the third valve pocket through hole section, and the balance valve core has balance valve core through-hole up and down, the balance
Valve core through hole includes the upper through hole section being located in the first balance valve core section and in the second balance valve core section and is located at
Lower through-hole section in the third balance valve core section, the aperture of the upper through hole section are less than the hole of the third valve pocket through hole section
Diameter, the aperture of the lower through-hole section are less than the aperture of the upper through hole section, the shape on the periphery wall of the second balance valve core section
Compatible first control chamber of inner opening of first flow described in Cheng Youyu；
Plunger, the plunger is fixedly linked with the end plug and the lower end of the plunger extends downwardly into the valve pocket through-hole and grafting
So that the balance valve core can be slided up and down relative to the plunger in the upper through hole section, on the plunger have opening to
Under plunger blind hole, the bottom surface of the plunger blind hole is located on the upper surface of the end plug, the open end of the plunger blind hole
With damping hole；
Piston, the piston include the glissile segment being socketed on the plunger and the backstop section on the glissile segment,
The internal perisporium of the glissile segment can slide up and down to be connected with the periphery wall of the plunger and the periphery wall of the glissile segment can on
Be connected with the internal perisporium of the first valve hole section to lower slider, the internal diameter of the backstop section be more than the outer diameter of the plunger and
The outer diameter of the backstop section is less than the internal diameter of the first valve hole section, has connection described only on the side wall of the backstop section
The piston through flow hole of the periphery wall and internal perisporium of section is kept off, there is the periphery wall for being connected to the plunger and institute on the side wall of the plunger
The plunger through flow hole of plunger blind hole is stated, the plunger through flow hole is located at the upper surface of described glissile segment；
First spring, first spring are socketed on the plunger, and the upper end of first spring is against the glissile segment
The lower face and lower end of first spring is against the upper surface of the first balance valve core section, first spring often pushes away upwards
The piston is moved so that the upper surface of the backstop section is against the lower face of the end plug, first spring often pushes downwards institute
State balance valve core so that the second balance valve core section lower face against the third valve pocket through hole section terrace of appearing on the stage, this
When, the lower end of the third balance valve core section extends downwardly into the 4th valve pocket through hole section, in the first valve pocket through hole section,
Is defined between the upper surface of the periphery wall of the plunger, the lower face of the main paragraph and the first balance valve core section
There is on the side wall of the valve pocket two control chambers second flow channel, the outward opening of the second flow channel to be located at the periphery of the valve pocket
On wall and the inner opening of the second flow channel is connected to second control chamber, and the outward opening of the second flow channel constitutes third oil
Mouthful；
First baffle ring, first baffle ring are fixedly attached on the plunger and below the pistons；
Spring base, the spring base fixation are located in the 4th valve pocket through hole section；
Nonreturn valve core, the nonreturn valve core include can slide up and down to main paragraph of the cooperation in the 4th valve pocket through hole section with
And below the main paragraph and undergauge section of the cooperation in the spring base can be slided up and down to, have on the nonreturn valve core
Have a nonreturn valve core through-hole up and down, the aperture of the nonreturn valve core through-hole be less than the aperture of the third valve pocket through hole section and
More than the aperture of the upper through hole section, the lower end of the nonreturn valve core through-hole constitutes the 4th hydraulic fluid port；
Second spring, the second spring are socketed in the undergauge section, and the upper end of the second spring is against the main paragraph
Lower face and the second spring lower end against the spring base, the second spring often pushes the nonreturn valve core upwards
So that the through flow hole is closed in the upper surface of the nonreturn valve core against the lower face of the third balance valve core section；
It is S1 to enable the axial cross section of the nonreturn valve core through-hole accumulate, the axial cross section of upper through hole section product is S2, described first
The axial cross section product of valve pocket through hole section is S3, the axial cross section of the second valve pocket through hole section product is S4, then S1, S2, S3 and S4
Between meet (S3-S2)/(S1-S2)=1.3, and (S4-S1)/(S1-S2) > 3.
2. balanced valve according to claim 1, which is characterized in that further include the second baffle ring, second baffle ring is embedded
With the fixation spring base on the inner wall of the 4th valve pocket through hole section.
3. balanced valve according to claim 1 or 2, which is characterized in that the throttle orifice is along the third valve pocket through hole section
It is axial arranged have multi-turn, often circle on have along the third valve pocket through hole section circumferential uniform intervals arrange multiple sections
Discharge orifice.
4. balanced valve according to claim 1 or 2, which is characterized in that the upper end spiral shell of the end plug and the valve pocket through-hole
Line connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810963247.1A CN108775431A (en) | 2018-08-22 | 2018-08-22 | Balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810963247.1A CN108775431A (en) | 2018-08-22 | 2018-08-22 | Balanced valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108775431A true CN108775431A (en) | 2018-11-09 |
Family
ID=64028737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810963247.1A Pending CN108775431A (en) | 2018-08-22 | 2018-08-22 | Balanced valve |
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| Country | Link |
|---|---|
| CN (1) | CN108775431A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538564A (en) * | 2018-11-23 | 2019-03-29 | 宁波真格液压科技有限公司 | A kind of proportional balancing valve |
| CN109538563A (en) * | 2018-11-23 | 2019-03-29 | 李军 | A kind of balanced valve |
| CN110748518A (en) * | 2019-11-05 | 2020-02-04 | 武芳 | Excavator load keeps valve |
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| CN105971963A (en) * | 2016-07-19 | 2016-09-28 | 宁波文泽机电技术开发有限公司 | Flow type balancing valve |
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| CN101634317A (en) * | 2009-08-21 | 2010-01-27 | 宁波汉商液压有限公司 | Plug-in type balance valve |
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| CN109538564A (en) * | 2018-11-23 | 2019-03-29 | 宁波真格液压科技有限公司 | A kind of proportional balancing valve |
| CN109538563A (en) * | 2018-11-23 | 2019-03-29 | 李军 | A kind of balanced valve |
| CN110748518A (en) * | 2019-11-05 | 2020-02-04 | 武芳 | Excavator load keeps valve |
| CN110748518B (en) * | 2019-11-05 | 2021-04-06 | 山东金利液压科技有限公司 | Excavator load keeps valve |
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