CN108843645A - A kind of balanced valve - Google Patents
A kind of balanced valve Download PDFInfo
- Publication number
- CN108843645A CN108843645A CN201810806737.0A CN201810806737A CN108843645A CN 108843645 A CN108843645 A CN 108843645A CN 201810806737 A CN201810806737 A CN 201810806737A CN 108843645 A CN108843645 A CN 108843645A
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- Prior art keywords
- valve
- hole
- valve core
- balance
- spring
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Classifications
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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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/355—Pilot pressure control
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The present invention proposes a kind of balanced valve, including：Valve seat, valve casing, valve pocket, balance valve core, nonreturn valve core, baffle ring, the first spring compensate plunger, second spring, inverse proportion overflow valve.Balanced valve according to an embodiment of the present invention, the processing is simple, area of passage without mutation, can quickly play safety protection function and energy conservation.
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 technique
In the mechanical equipments such as modern engineering machinery, building machinery, raising hydraulic circuit is widely applied, wherein balanced valve
It is the key that hydraulic cylinder work Hydraulic Elements, the superiority and inferiority for balancing valve performance directly affect the property of host in control hoisting circuit
Energy.
The existing generally existing such a disadvantage of hydraulically balanced valve：When loading decentralization, due to hydraulically balanced valve valve port
The phenomenon that area of passage can generate the characteristics of mutation, and load can be made to generate low-frequency jitter and impact, causes system unstable, influences
The security reliability of complete machine；And during cylinder efficient, since balanced valve timely cannot impact the pressure generated by buffer load
Power peak value, also causes great harm hydraulic device.Patent No. CN201310462178.3, the hair of entitled " balanced valve "
Bright patent provides a kind of balanced valve of area of passage gradual change, by milled out on poppet valve core the different groove of multiple width,
Aperture and inclined hole combination, achieve the purpose that flow gradual change.But there is also following disadvantages for this design：
(1) what is passed through when load decentralization and load rise is same valve port, can all generate restriction effect, and is loaded in practice
Throttling action is not needed when rising, seriously affects the efficiency of operation；A check valve in parallel, nothing are also needed in order to solve this problem
Expense is increased in shape.
(2) groove milling on poppet valve core, processing complexity, low efficiency, therefore cost of manufacture is high.
(3) load pressure acts on difference in areas S, and spool overall movement is pushed to overcome spring force, and valve port opening is played
Safe valve action.Because spool matable assembly is more in practical application, and tail portion is equipped with sealing ring, and overall friction is big, spool
Unlatching has certain delay, thus causes the setting pressure that actual pressure peak in system is greater than spring.For example,
The maximum pressure of spring setting is 20MPa, is postponed in practical application because spool is opened, surge pressure can achieve 35-
40MPa produces certain harm to the safety of hydraulic device in this way.
(4) what is passed through when loading up and down, safety overflow is all same valve port, that is, forms the spool of this valve port
And valve seat, in up and down each time, safety overflow will either on or off it is primary, in this case cause spool or valve seat
Frequency of use is high, to shorten service life.
(5) the spring setting pressure of balanced valve is constant, reversed for different load behavior balanced valves unlatching pressure
Power is all fixed and invariable, and needs to open the control pressure and the higher work of load of balanced valve for loading lower operating condition in this way
Condition be it is the same, very big capacity loss can be generated in this way, it is not energy-efficient.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the processing is simple an object of the present invention is to provide a kind of, area of passage without mutation, can quickly play
Safety protection function and energy-efficient balanced valve.
Balanced valve according to an embodiment of the present invention, including：
Valve seat, has the valve seat through-hole for penetrating through the valve seat in left-right direction on the valve seat, and the valve seat through-hole includes
Valve seat connection hole, valve seat connection hole section, valve seat transition hole section and valve seat from left to right slides hole section, the valve seat connecting hole
The aperture of section is greater than the aperture of valve seat connection hole section, and the aperture of the valve seat connection hole section is greater than the valve seat and slides hole section
Aperture, the aperture of the valve seat transition hole section is connected to hole section from the valve seat and is sequentially reduced to valve seat sliding hole section, institute
Stating has the first hydraulic fluid port for being connected to the Connectivity Section on the side wall of valve seat, the right end of the valve seat through-hole is configured to the second hydraulic fluid port；
Valve casing has the valve casing blind hole of opening to the right on the valve casing, and it is blind that the left end of the valve seat is plugged on the valve casing
In the right end in hole, the right side of the valve casing is located at the left side of first hydraulic fluid port, has third oil on the side wall of the valve casing
Mouth and the 4th hydraulic fluid port positioned at the third hydraulic fluid port right side；
Valve pocket, the valve pocket is located in the valve casing blind hole and the right end of the valve pocket is plugged on the valve seat connection hole
It is interior, there is the valve pocket through-hole for penetrating through the valve pocket in left-right direction, the valve pocket through-hole includes valve pocket main hole on the valve pocket
The aperture of section and the valve pocket undergauge hole section positioned at the valve pocket main body hole section right side, the valve pocket undergauge hole section is greater than the valve seat
It slides the aperture of hole section and is less than the aperture of valve seat connection hole section, have and the 4th hydraulic fluid port on the outer wall of the valve pocket
The valve pocket of connection is through-flow slot；
Balance valve core, the balance valve core include the spool master that can movably cooperate in the valve pocket main body hole section
Body section can movably cooperate the first spool undergauge section in the valve pocket undergauge hole section and can movably cooperate
The second spool undergauge section in valve seat sliding hole section, the left side of the second spool undergauge section have for opening and closing
Dashing forward for the valve seat transition hole section is stupefied, has between the right side of the spool main paragraph and the left side of the valve pocket main body hole section
There is gap to be configured to the first control chamber, first control chamber passes through the flowing hole and the valve that are located in the sleeve side wall
Through-flow slot connection is covered, there is the balance valve core through-hole for penetrating through the balance valve core in left-right direction on the balance valve core, it is described
Balance valve core through-hole includes that the balance valve core first being distributed from left to right slides hole section, balance valve core spring hole section, balance valve core
Second sliding hole section, balance valve core connection hole section peace weighing apparatus spool connection hole, the balance valve core first slide the hole of hole section
Diameter is greater than the aperture of the balance valve core spring hole section, and the aperture of the balance valve core spring hole section is greater than the balance valve core the
The aperture of two sliding hole sections, the aperture of the balance valve core spring hole section are equal to the aperture of the balance valve core connection hole, institute
It is slided between the aperture of the balance valve core connection hole and the balance valve core second in the aperture for stating balance valve core connection hole section
Between the aperture of hole section, has on the side wall of the balance valve core and be connected to the first hydraulic fluid port V and the balance valve core intercommunicating pore
First through flow hole of section has the throttle orifice positioned at the stupefied right side of dashing forward on the side wall of the balance valve core；
Nonreturn valve core, the nonreturn valve core can movably be located at the balance valve core second and slide in hole section, described
The right end of nonreturn valve core cooperates in the balance valve core connection hole and the balanced valve is protruded into the left end of the nonreturn valve core
In core spring hole section, there is the through-flow slot of nonreturn valve core compatible with first through flow hole on the peripheral wall of the nonreturn valve core,
There is the first damping hole for penetrating through the nonreturn valve core in left-right direction on the nonreturn valve core；
Baffle ring, the baffle ring are fixedly attached to the left end of the nonreturn valve core；
First spring, first spring are set on the nonreturn valve core, and the left end of first spring is against described
The right end of baffle ring and first spring against the balance valve core second sliding hole section left end, first spring be used for
A left side often pulls the nonreturn valve core so that the right end of the nonreturn valve core often closes the left opening of the balance valve core connection hole；
Plunger is compensated, the plunger rod of the compensation plunger is inserted into the valve pocket through-hole from left to right and the compensation plunger
Plunger rod right end cooperation in the balance valve core first sliding hole section, the right side of stopper head of the compensation plunger is supported
By the left side of the valve pocket and the stopper head of the compensation plunger against the valve casing, in the valve pocket through-hole, the benefit
It repays plunger and the balance valve core defines the second control chamber, in the valve casing blind hole, the compensation plunger and the valve casing
Third control chamber is defined, the third control chamber is connected to the third hydraulic fluid port, is had on the stopper head of the compensation plunger
It is connected to the second through flow hole of second control chamber Yu the third control chamber, has on the compensation plunger and passes through in left-right direction
Lead to the second damping hole of the compensation plunger；
Second spring, the second spring are socketed on the plunger rod of the compensation plunger, the left end of the second spring
Against the stopper head of the compensation plunger and the right end of the second spring is against the balance valve core, and the second spring is used for
The balance valve core is often pushed to the right；
Inverse proportion overflow valve, the inverse proportion overflow valve include relief valve seat, overflow spool, flux sleeve, push rod, armature,
Third spring, coil and quiet iron, the magnetic conduction is set in the valve casing 1 and the right end of the flux sleeve protrudes into the right the valve casing
Interior, the relief valve seat is located in the valve casing, and the left end of the relief valve seat is located in the flux sleeve and the overflow valve
The right end of seat is located in the stopper head of the compensation plunger, and the relief valve seat has the through-hole of left and right perforation, the through-hole
Right end has stage portion, and the aperture of the stage portion is less than the aperture of the through-hole, has position on the side wall of the relief valve seat
The connecting hole being connected on the left of the stage portion and with the third control chamber, a left side for the stage portion and second damping hole
End connection, the overflow spool can be movably fitted in the through hole, and the right end of the overflow spool has described
The stopper section of stage portion institute backstop has the relief portion for avoiding the connecting hole, the overflow on the side wall of the overflow spool
The left end of the relief valve seat is stretched out in the left end of spool to the left, and the push rod can be movably located in the flux sleeve, institute
The right end of push rod is stated against the left end of the overflow spool, the armature can be movably located in the flux sleeve, described
The right end of armature is socketed on the flux sleeve against the left end of the push rod, the coil, and the quiet iron is located at the magnetic conduction
It puts on, the third spring is located in the flux sleeve, and the left end of the third spring is against the quiet iron and the third bullet
The right end of spring is against the armature.
Advantageously, when the coil losing electricity, the third spring push the armature to the right so that the armature to the right
The push rod is pushed, and then so that the push rod is pushed the overflow spool to the right so that the stopper section is against the stage portion,
The right end of the through-hole is closed with this.
Advantageously, when the coil obtains electric, it is described to be shifted left close to that the armature overcomes the elastic force of the third spring
Quiet iron, the push rod and overflow spool can be moved to the left so that the stage portion is left towards a left side in the stopper section, with this
To open the left end of the through-hole.
Advantageously, the third control chamber is connected to the logical runner being located on the valve casing 1 of the third hydraulic fluid port.
Advantageously, the throttle orifice is arranged to multi-turn along the axial direction of the balance valve core, and every circle throttle orifice includes
It is arranged along the circumferential uniform intervals of the balance valve core multiple.
Advantageously, the throttle orifice of two adjacent rings is mutually staggered.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the schematic diagram of balanced valve according to an embodiment of the invention；
Fig. 2 is the schematic diagram of the inverse proportion overflow valve of balanced valve according to an embodiment of the invention；
Fig. 3 is the hydraulic schematic diagram of balanced valve according to an embodiment of the invention；
Fig. 4 is the hydraulic schematic diagram of one application scenarios of balanced valve according to an embodiment of the invention.
Specific embodiment
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 is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is described in detail balanced valve according to an embodiment of the present invention.
As shown in Figures 1 to 4, balanced valve according to an embodiment of the present invention, including：Valve seat 6, valve casing 1, valve pocket 3, balanced valve
Core 5, nonreturn valve core 7, baffle ring 9, the first spring 8 compensate plunger 2, second spring 4, inverse proportion overflow valve 10.
Specifically, having the valve seat through-hole for penetrating through valve seat 6 in left-right direction on valve seat 6, the valve seat through-hole includes certainly
Valve seat connection hole, valve seat connection hole section, valve seat transition hole section and the valve seat of from left to right slide hole section, the valve seat connection hole
Aperture be greater than the aperture of valve seat connection hole section, the aperture of valve seat connection hole section is greater than valve seat sliding hole section
Aperture, the aperture of the valve seat transition hole section are connected to hole section from the valve seat and are sequentially reduced (i.e. institute to valve seat sliding hole section
Stating valve seat transition hole section is the taper hole section that left end opening is big, right-end openings are small), have on the side wall of valve seat 6 and is connected to the company
First hydraulic fluid port V of logical section, the right end of the valve seat through-hole are configured to the second hydraulic fluid port C.
There is the valve casing blind hole of opening to the right on valve casing 1, the left end of valve seat 6 is plugged in the right end of the valve casing blind hole,
The right side of valve casing 1 is located at the left side of the first hydraulic fluid port V, has third hydraulic fluid port Y on the side wall of valve casing 1 and is located at the right side third hydraulic fluid port Y
The 4th hydraulic fluid port X in face.
Valve pocket 3 is located in the valve casing blind hole and the right end of valve pocket 3 is plugged in the valve seat connection hole, on valve pocket 3
With in left-right direction penetrate through valve pocket 3 valve pocket through-hole, the valve pocket through-hole include valve pocket main body hole section and be located at the valve pocket
The valve pocket undergauge hole section on the main body hole section right side, the aperture of the valve pocket undergauge hole section be greater than the aperture of valve seat sliding hole section and
Less than the aperture of valve seat connection hole section, there is the through-flow slot 31 of valve pocket being connected to the 4th hydraulic fluid port X on the outer wall of valve pocket 3.
Balance valve core 5 includes the spool main paragraph that can movably cooperate in the valve pocket main body hole section, can control
Movably cooperate the first spool undergauge section in the valve pocket undergauge hole section and can movably cooperate sliding in the valve seat
The left side of the second spool undergauge section in dynamic hole section, the second spool undergauge section has for opening and closing the valve seat mistake
That crosses hole section dashes forward stupefied 51, have between the right side of the spool main paragraph and the left side of the valve pocket main body hole section gap with
The first control chamber 1b, the first control chamber 1b is configured to connect by the through-flow slot 31 of flowing hole 32 and valve pocket being located in sleeve side wall
It is logical, there is the balance valve core through-hole for penetrating through balance valve core 5 in left-right direction, the balance valve core through-hole includes on balance valve core 5
The balance valve core first being distributed from left to right slides hole section, balance valve core spring hole section, balance valve core second and slides hole section, balance
Spool is connected to hole section peace weighing apparatus spool connection hole, and the aperture that the balance valve core first slides hole section is greater than the balance valve core
The aperture of spring hole section, the aperture of the balance valve core spring hole section are greater than the aperture of the balance valve core second sliding hole section,
The aperture of the balance valve core spring hole section is equal to the aperture of the balance valve core connection hole, and the balance valve core is connected to hole section
Aperture between the aperture that the aperture of the balance valve core connection hole and the balance valve core second slide hole section, balance
There is the first hydraulic fluid port V of connection the first through flow hole 52 of hole section, balance valve core 5 are connected to the balance valve core on the side wall of spool 5
Side wall on have and be located at the throttle orifice 53 on stupefied 51 right side of dashing forward.Advantageously, throttle orifice 53 is arranged to more along the axial direction of balance valve core 5
Circle, every circle throttle orifice 53 include the multiple of the circumferential uniform intervals arrangement along balance valve core 5.Further, two adjacent rings
Throttle orifice 53 is mutually staggered.
Nonreturn valve core 7 can movably be located at the balance valve core second and slide in hole section, and the right end of nonreturn valve core 7 is matched
It closes in the balance valve core connection hole and the left end of nonreturn valve core 7 is protruded into the balance valve core spring hole section, check valve
There is the through-flow slot 71 of nonreturn valve core compatible with the first through flow hole 52 on the peripheral wall of core 7, have on nonreturn valve core 7 along right and left
To the first damping hole 7a of perforation nonreturn valve core 7.
Baffle ring 9 is fixedly attached to the left end of nonreturn valve core 7.
First spring 8 is set on nonreturn valve core 7, and the left end of the first spring 8 is against baffle ring 9 and the right end of the first spring 8
Against the left end of the balance valve core second sliding hole section, the first spring 8 for often pulling nonreturn valve core 7 so that check valve to the left
The right end of core 7 often closes the left opening of the balance valve core connection hole.
The plunger rod of compensation plunger 2 is inserted into the right end in the valve pocket through-hole and compensating the plunger rod of plunger 2 from left to right
Cooperation compensates the right side of the stopper head of plunger 2 against valve pocket 3 and compensation plunger in the balance valve core first sliding hole section
The left side of 2 stopper head is against valve casing 1, and in the valve pocket through-hole, compensation plunger 2 and balance valve core 5 define the second control
Chamber 1a processed, in the valve casing blind hole, compensation plunger 2 and valve casing 1 define third control chamber 1c, third control chamber 1c and third
Hydraulic fluid port Y connection compensates second through flow hole on the stopper head of plunger 2 with connection the second control chamber 1a and third control chamber 1c
21, compensate second damping hole 22 on plunger 2 with perforation compensation plunger 2 in left-right direction.Advantageously, third control chamber 1c with
The logical runner 1d connection being located on valve casing 1 of third hydraulic fluid port Y.What needs to be explained here is that compensation plunger 2 described herein,
The periphery wall of plunger rod is smooth, is not provided with external screw thread.
Second spring 4 is socketed on the plunger rod of compensation plunger 2, and the left end of second spring 4 is against the plunger for compensating plunger 2
The head and right end of second spring 4 is against balance valve core 5, second spring 4 is for often pushing to the right balance valve core 5.
Inverse proportion overflow valve 10 include relief valve seat 101, overflow spool 102, flux sleeve 103, push rod 104, armature 105,
Third spring 106, coil 107 and quiet iron 108.Flux sleeve 103 is located at valve casing 1 and the right end of flux sleeve 103 protrudes into the right valve casing 1
Interior, relief valve seat 101 is located in valve casing 1, and the right end of relief valve seat 101 is located in flux sleeve 103 and the left end of relief valve seat 101
It is located in the stopper head of compensation plunger 2, relief valve seat 101 has the through-hole of left and right perforation, and the right end of the through-hole has step
Portion, the aperture of the stage portion are less than the aperture of the through-hole, have on the side wall of relief valve seat 101 and are located at the stage portion left side
Side and the connecting hole being connected to third control chamber 1c, the stage portion are connected to the left end of the second damping hole 22, overflow spool 102
It can movably be fitted in the through hole, the right end of overflow spool 102 has by the stopper section of stage portion institute backstop,
There is the relief portion for avoiding the connecting hole, overflow valve is stretched out in the left end of overflow spool 102 to the left on the side wall of overflow spool 102
The left end of seat 101, push rod 104 can be movably located in flux sleeve 103, and the right end of push rod 104 is against overflow spool 102
Left end, armature 105 can be movably located in flux sleeve 103, and the right end of armature 105 is against the left end of push rod 104, coil
107 are socketed on flux sleeve 103, and quiet iron 108 is located on flux sleeve 103, and third spring 106 is located in flux sleeve 103, third bullet
The left end of spring 106 is against the right end of quiet iron 108 and third spring 106 against armature 105.
When 107 power loss of coil, third spring 106 pushes armature 105 to the right so that armature 105 pushes to the right push rod 104,
And then so that push rod 104 is pushed overflow spool 102 to the right so that the stopper section is against the stage portion, described lead to is closed with this
The right end in hole.
When coil 107 must be electric, armature 105 overcomes the elastic force of third spring 106 to be shifted left close to quiet iron 108, push rod 104
And overflow spool 102 can be moved to the left so that the stage portion is left towards a left side in the stopper section, opens the through-hole with this
Left end.
Balanced valve according to an embodiment of the present invention is divided into rising at work, stops, declining three processes.
(1) uphill process：The pressure oil that the pressure oil of reversal valve 11 reaches the first hydraulic fluid port V, the first hydraulic fluid port V pushes check valve
Core 7 overcomes the elastic force of the first spring 8 to move right, and pressure oil flows into the nothing that the second hydraulic fluid port C reaches hydraulic cylinder 12 through the first hydraulic fluid port V
Rod cavity pushes 12 uplink of hydraulic cylinder.This staged pressure oil flows into the second hydraulic fluid port C by the first hydraulic fluid port V and does not have throttling action.
(2) during declining, the scheduled voltage signal of inverse proportion overflow valve 10 is given so that the 4th hydraulic fluid port X control pressure is enough
Small, the pressure oil of the 4th hydraulic fluid port X enters the first control chamber 1b and is applied on balance valve core 5, overcomes the preload of second spring 4
Power, balance valve core 5 move to left, and first open the valve seat transition hole section.4th hydraulic fluid port X pressure increase, balance valve core 5 are just further left
It moves, each radial throttle orifice 53 covered in front of gradually exposing, such area of passage is that mitigation is increased, loads lowering velocity
Available accurate control.The gradual change of area of passage can gradually be connected to realize by throttle orifice 53, the low appearance of processing cost
It is easy to control.
(3) stopped process, the 4th hydraulic fluid port X pressure reduction, second spring 4 push balance valve core 5 to move to right, and area of passage is gradually
It reduces, valve port is shut.
(4) in stopped process, when so that load pressure is generated impact due to external force, hydraulic oil passes through overflow spool
102 overcome the pretightning force of third spring 106, quickly open, and compression shock buffering is fallen.Oil pressure relief size can pass through application
Voltage swing on to coil 107 is set up.
Balanced valve according to an embodiment of the present invention has the advantages that：
(1) balance valve core 5 is provided with throttle orifice 53 axially and circumferentially, when the valve seat transition hole section of balance valve core 5 is beaten
When opening, these throttle orifices 53 can be successively opened, is configured, can accurately be controlled by reasonable pore size and axially spaced-apart
Flow area variation, thus accurate flow control.
(2) the first damping hole 7a is provided among nonreturn valve core 7, when the impact of the second hydraulic fluid port C load pressure, if percussive pressure
Power is more than the setting pressure of third spring 106, and pressure oil is by being applied to inverse proportion after the first damping hole 7a, the second damping hole 22
On the overflow spool 102 of overflow valve 10, overflow spool 102 is quickly opened, and surge is discharged.Because of overflow spool 102
No sealing ring cooperation without other frictional resistance, therefore responds rapidly, no lag.
(3) what is passed through when load rises is the valve port between nonreturn valve core 7 and balance valve core 5；Pass through when load decline
It is the valve port of balance valve core 7, the formation of valve seat 6；What hydraulic oil passed through when compensator or trimmer pressure impacts is overflow spool 102 and overflow
The valve port that valve seat 101 is formed；The unlatching of valve port each in this way, frequency reduce, and can prolong the service life.
(4) voltage swing on the coil 107 by changing inverse proportion overflow valve 10 can change opening for overflow spool 102
Pressure is opened, when coil 107 must not be electric, the cracking pressure of overflow spool 102 is maximum, increases the voltage of coil 107, then armature
105 generate certain suction to the left goes to overcome the active force of third spring 106, to reduce the unlatching pressure of overflow spool 102
Power.The advantage that be, for loading lesser operating condition, by the pressure sensor senses in hydraulic system, and then pass through
Controller gives the control voltage of any to inverse proportion overflow valve 10, and the second hydraulic fluid port C passes through inverse ratio when opening balanced valve reversely
Example overflow valve 10 flow back into third hydraulic fluid port Y, in this case due to the presence of the first damping hole 7a, makes balance valve core 5 and compensation column
Pressure difference is produced between region and the second hydraulic fluid port C between plug 2, this pressure difference produces thrust to the left for balance valve core 5, because
This can reduce the control pressure of the 4th hydraulic fluid port X in the case where second spring 4 is constant, have energy-efficient effect.
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 the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting 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 of the features.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；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
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 in the second feature " on " or " down " can be with
It is that the first and second features directly 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
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height 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 embodiment or examples.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 be changed, modify, replacement and variant, each fall within protection scope of the present invention.
Claims (6)
1. a kind of balanced valve, which is characterized in that including：
Valve seat, has the valve seat through-hole for penetrating through the valve seat in left-right direction on the valve seat, and the valve seat through-hole includes from left
Valve seat connection hole, valve seat connection hole section, valve seat transition hole section and valve seat to the right slides hole section, the valve seat connection hole
Aperture is greater than the aperture of valve seat connection hole section, and the aperture of the valve seat connection hole section is greater than the hole of valve seat sliding hole section
Diameter, the aperture of the valve seat transition hole section are connected to hole section from the valve seat and are sequentially reduced to valve seat sliding hole section, the valve
There is the first hydraulic fluid port for being connected to the Connectivity Section, the right end of the valve seat through-hole is configured to the second hydraulic fluid port on the side wall of seat；
Valve casing has the valve casing blind hole of opening to the right on the valve casing, and the left end of the valve seat is plugged on the valve casing blind hole
In right end, the right side of the valve casing is located at the left side of first hydraulic fluid port, have on the side wall of the valve casing third hydraulic fluid port and
The 4th hydraulic fluid port positioned at the third hydraulic fluid port right side；
Valve pocket, the valve pocket is located in the valve casing blind hole and the right end of the valve pocket is plugged in the valve seat connection hole,
Have on the valve pocket and penetrate through the valve pocket through-hole of the valve pocket in left-right direction, the valve pocket through-hole include valve pocket main body hole section and
It is slided greater than the valve seat in the aperture of valve pocket undergauge hole section positioned at the valve pocket main body hole section right side, the valve pocket undergauge hole section
The aperture of hole section and the aperture for being less than valve seat connection hole section, have on the outer wall of the valve pocket and are connected to the 4th hydraulic fluid port
The through-flow slot of valve pocket；
Balance valve core, the balance valve core include the spool main body that can movably cooperate in the valve pocket main body hole section
Section can movably cooperate the first spool undergauge section in the valve pocket undergauge hole section and can movably cooperate in institute
The second spool undergauge section in valve seat sliding hole section is stated, the left side of the second spool undergauge section has for opening and closing institute
It states that dashing forward for valve seat transition hole section is stupefied, has between the right side of the spool main paragraph and the left side of the valve pocket main body hole section
To be configured to the first control chamber, first control chamber passes through the flowing hole and the valve pocket that are located in the sleeve side wall in gap
Through-flow slot is connected to, and has the balance valve core through-hole for penetrating through the balance valve core in left-right direction on the balance valve core, described flat
Weighing apparatus valve core through hole includes that the balance valve core first that is distributed from left to right slides hole section, balance valve core spring hole section, balance valve core the
Two sliding hole sections, balance valve core connection hole section peace weighing apparatus spool connection hole, the balance valve core first slide the aperture of hole section
Greater than the aperture of the balance valve core spring hole section, the aperture of the balance valve core spring hole section is greater than the balance valve core second
The aperture of hole section is slided, the aperture of the balance valve core spring hole section is equal to the aperture of the balance valve core connection hole, described
Balance valve core is connected to aperture and balance valve core second sliding eye of the aperture of hole section between the balance valve core connection hole
There is connection first hydraulic fluid port to be connected to hole section with the balance valve core between the aperture of section, on the side wall of the balance valve core
First through flow hole has the throttle orifice positioned at the stupefied right side of dashing forward on the side wall of the balance valve core；
Nonreturn valve core, the nonreturn valve core can movably be located at the balance valve core second and slide in hole section, described unidirectional
The right end of spool cooperates in the balance valve core connection hole and the balance valve core bullet is protruded into the left end of the nonreturn valve core
In spring hole section, there is the through-flow slot of nonreturn valve core compatible with first through flow hole on the peripheral wall of the nonreturn valve core, it is described
There is the first damping hole for penetrating through the nonreturn valve core in left-right direction on nonreturn valve core；
Baffle ring, the baffle ring are fixedly attached to the left end of the nonreturn valve core；
First spring, first spring are set on the nonreturn valve core, and the left end of first spring is against the baffle ring
And the right end of first spring, against the left end of the balance valve core second sliding hole section, first spring is for normal to the left
The nonreturn valve core is pulled so that the right end of the nonreturn valve core often closes the left opening of the balance valve core connection hole；
Plunger is compensated, the plunger rod of the compensation plunger is inserted into the valve pocket through-hole from left to right and the column of the compensation plunger
The right end cooperation of stopper rod is in the balance valve core first sliding hole section, and the right side of the stopper head of the compensation plunger is against institute
State valve pocket and it is described compensation plunger stopper head left side against the valve casing, in the valve pocket through-hole, the compensation column
Plug defines the second control chamber with the balance valve core, and in the valve casing blind hole, the compensation plunger and the valve casing are limited
There is third control chamber, the third control chamber is connected to the third hydraulic fluid port, has connection on the stopper head of the compensation plunger
Second through flow hole of second control chamber and the third control chamber has on the compensation plunger and penetrates through institute in left-right direction
State the second damping hole of compensation plunger；
Second spring, the second spring are socketed on the plunger rod of the compensation plunger, the left end of the second spring against
The stopper head of the compensation plunger and right end of the second spring is against the balance valve core, the second spring is for the right
Often push the balance valve core；
Inverse proportion overflow valve, the inverse proportion overflow valve include relief valve seat, overflow spool, flux sleeve, push rod, armature, third
Spring, coil and quiet iron, the magnetic conduction is set on the valve casing and the right end of the flux sleeve protrudes into the right in the valve casing,
The relief valve seat is located in the valve casing, and the left end of the relief valve seat is located in the flux sleeve and the relief valve seat
Right end is located in the stopper head of the compensation plunger, and the relief valve seat has the through-hole of left and right perforation, the right end of the through-hole
With stage portion, the aperture of the stage portion is less than the aperture of the through-hole, has on the side wall of the relief valve seat and is located at institute
State the connecting hole being connected on the left of stage portion and with the third control chamber, the left end company of the stage portion and second damping hole
Logical, the overflow spool can be movably fitted in the through hole, and the right end of the overflow spool has by the step
The stopper section of institute of portion backstop has the relief portion for avoiding the connecting hole, the overflow spool on the side wall of the overflow spool
Left end stretch out the left end of the relief valve seat to the left, the push rod can be movably located in the flux sleeve, described to push away
The right end of bar can be movably located in the flux sleeve against the left end of the overflow spool, the armature, the armature
Right end against the left end of the push rod, the coil is socketed on the flux sleeve, and the quiet iron is located on the flux sleeve,
The third spring is located in the flux sleeve, and the left end of the third spring is against the right side of the quiet iron and the third spring
End is against the armature.
2. balanced valve according to claim 1, which is characterized in that when the coil losing electricity, the third spring is to the right
The armature is pushed so that the armature pushes to the right the push rod, so make the push rod push to the right the overflow spool with
Make the stopper section against the stage portion, the right end of the through-hole is closed with this.
3. balanced valve according to claim 1, which is characterized in that when the coil obtains electric, the armature overcomes described
The elastic force of third spring is to be shifted left close to the quiet iron, and the push rod and the overflow spool can be moved to the left so that described stop
Stopper leaves the stage portion towards a left side, and the left end of the through-hole is opened with this.
4. balanced valve according to claim 1, which is characterized in that the third control chamber is led to the third hydraulic fluid port to be located at
Runner connection on the valve casing.
5. balanced valve according to claim 1, which is characterized in that axial direction arrangement of the throttle orifice along the balance valve core
At multi-turn, every circle throttle orifice includes the multiple of the circumferential uniform intervals arrangement along the balance valve core.
6. balanced valve according to claim 5, which is characterized in that the throttle orifice of two adjacent rings is mutually staggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810806737.0A CN108843645A (en) | 2018-07-20 | 2018-07-20 | A kind of balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810806737.0A CN108843645A (en) | 2018-07-20 | 2018-07-20 | A kind of balanced valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108843645A true CN108843645A (en) | 2018-11-20 |
Family
ID=64196709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810806737.0A Withdrawn CN108843645A (en) | 2018-07-20 | 2018-07-20 | A kind of balanced valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843645A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296527A (en) * | 2018-12-01 | 2019-02-01 | 李军 | A kind of reciprocating pump control valve |
| 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 |
| CN111271486A (en) * | 2020-03-01 | 2020-06-12 | 东莞海特帕沃液压科技有限公司 | Pressure reducing valve |
| US10683879B1 (en) | 2019-01-22 | 2020-06-16 | Sun Hydraulics, Llc | Two-port electrohydraulic counterbalance valve |
| CN111456977A (en) * | 2020-04-09 | 2020-07-28 | 上海诺玛液压系统有限公司 | High-pressure large-flow inverse proportion overflow valve |
| CN111664136A (en) * | 2020-05-25 | 2020-09-15 | 圣邦集团有限公司 | Load compensation balance valve |
-
2018
- 2018-07-20 CN CN201810806737.0A patent/CN108843645A/en not_active Withdrawn
Cited By (9)
| 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 |
| CN109296527A (en) * | 2018-12-01 | 2019-02-01 | 李军 | A kind of reciprocating pump control valve |
| US10683879B1 (en) | 2019-01-22 | 2020-06-16 | Sun Hydraulics, Llc | Two-port electrohydraulic counterbalance valve |
| WO2020154045A1 (en) * | 2019-01-22 | 2020-07-30 | Sun Hydraulics, Llc | Two-port electrohydraulic counterbalance valve |
| CN111271486A (en) * | 2020-03-01 | 2020-06-12 | 东莞海特帕沃液压科技有限公司 | Pressure reducing valve |
| CN111456977A (en) * | 2020-04-09 | 2020-07-28 | 上海诺玛液压系统有限公司 | High-pressure large-flow inverse proportion overflow valve |
| CN111664136A (en) * | 2020-05-25 | 2020-09-15 | 圣邦集团有限公司 | Load compensation balance valve |
| CN111664136B (en) * | 2020-05-25 | 2024-04-19 | 圣邦集团有限公司 | Load compensation balance valve |
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Application publication date: 20181120 |