CN104235096B - Hydraulic-control main valve for energy recycling - Google Patents
Hydraulic-control main valve for energy recycling Download PDFInfo
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- CN104235096B CN104235096B CN201310363059.2A CN201310363059A CN104235096B CN 104235096 B CN104235096 B CN 104235096B CN 201310363059 A CN201310363059 A CN 201310363059A CN 104235096 B CN104235096 B CN 104235096B
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Abstract
The invention relates to a hydraulic-control main valve for energy recycling. The hydraulic-control main valve comprises end caps, a valve spool, a left check valve and a right check valve, one end cap is arranged at each end of the valve spool, and a left oil port T, an oil port A, an oil port I/L, an oil port I/M, an oil port I/R, an oil port B, a right oil port T and an oil port P are arranged on the valve spool; a spring and a spring seat are arranged between each end cap and the valve spool; the left check valve and the right check valve are embedded in the left and right ends of the valve spool respectively; the left check valve is composed of a left valve seat, a left cone valve spool and a left spring seat; the conical surface of the left cone valve spool clings to the left conical surface of the valve spool under the action of the left spring; the right check valve is composed of a right valve seat, a right cone valve spool and a right spring; the conical surface of the right cone valve spool clings to the right conical surface of the valve spool under the action of the right spring. By the hydraulic-control main valve, dropping speed of a piston can be limited, potential energy on the piston under the gravity action of a mechanism and materials is utilized, and energy recycling is realized.
Description
Technical field
The present invention relates to a kind of hydraulic control main valve, particularly to a kind of hydraulic control main valve of energy recycling.
Background technology
During hydraulic control main valve of the prior art uses, when valve element commutates to R position：The mistake that piston moves downward
Cheng Zhong, piston is subject to mechanism and material gravity to act on, and can accelerate to move downward, on the one hand, the fluid of plunger shaft is quickly discharged,
On the other hand, when accelerating to move downward, the flow that p flows to rodless cavity but can not meet in time, and this will result under piston stall
Fall and the not enough unfavorable phenomenon forming vacuum of cylinder rod chamber repairing.
Content of the invention
The purpose of the present invention is the defect overcoming prior art to exist, and provides one kind can limit piston falling speed, alive
The hydraulic control main valve of the energy recycling that the potential energy that plug is acted on by mechanism and material gravity uses.
The technical scheme realizing the object of the invention is：A kind of hydraulic control main valve of energy recycling, has end cap, valve
Core, left check valve and right check valve；The two ends of described valve element are equipped with an end cap, and valve element has left oil port T, hydraulic fluid port A, oil
Mouth I/L, hydraulic fluid port I/M, hydraulic fluid port I/R, hydraulic fluid port B, right oil port T and hydraulic fluid port P；It is equipped with spring and spring between described end cap and valve element
Seat；The left and right two ends of described valve element are embedded with left check valve and right check valve respectively；Described left check valve is by left valve seat, left poppet valve core
With left spring composition；The conical surface of described left poppet valve core is close on the left conical surface of valve element by the effect of left spring；Described right list
It is made up of to valve right valve seat, right poppet valve core and right spring；The conical surface of described right poppet valve core is close to valve by the effect of right spring
On the right conical surface of core.
Thick centre bore is had on the centrage of valve element described in technique scheme；By thin between the thick centre bore in described left and right
Centre bore connects, and thick centre bore has cone machine hole with the junction in small center hole；It is provided with a left side between described hydraulic fluid port P and hydraulic fluid port I/M
Meter in groove and right meter in groove；It is provided with left throttling channel between described hydraulic fluid port A and hydraulic fluid port I/L；Described left oil port T and hydraulic fluid port
It is provided with the left spill port group being made up of left first segment discharge orifice, left second throttle orifice and left 3rd throttle orifice between I/L；Described left
Two throttle orifices are communicated with hydraulic fluid port A；It is provided with right throttling channel between described hydraulic fluid port B and hydraulic fluid port I/R；Described right oil port T and hydraulic fluid port I/R it
Between be provided with the right spill port group of right first segment discharge orifice, right second throttle orifice and right 3rd throttle orifice composition；Described right second throttling
Hole and right 3rd throttle orifice are all communicated with hydraulic fluid port B.
The circumference of left valve seat described in technique scheme is provided with left first annular groove, left second annular groove, left first close
Sealing groove and left second seal groove, the centrage of left valve seat is provided with left valve base center hole；Described left first annular groove passes through radially
The left valve seat radial hole of setting is connected with left valve base center hole；Described left first seal groove and left second seal groove are equipped with left close
Seal；
The circumference of described right valve seat is provided with right first annular groove, right second annular groove, right first seal groove and right second
Seal groove, the centrage of right valve seat is provided with right valve base center hole；Described right first annular groove passes through the right valve seat being radially arranged
Radial hole is connected with right valve base center hole；It is equipped with right sealing ring in described right first seal groove and right second seal groove.
The left spring hole being communicated with the centrage of left poppet valve core described in technique scheme and left cone valve core bore, left cone
The right-hand member of valve element is provided with the left shoulder of a radial direction anchor ring；Described left shoulder be radially provided with left shoulder radial hole, left shoulder
Right-hand member there is a left shoulder conical surface；Described left shoulder radial hole is connected with left cone valve core bore；The angle of the described left shoulder conical surface
Degree is less than the angle of cone machine hole；
The right spring eye being communicated with the centrage of described right poppet valve core and right cone valve core bore, the right-hand member of right poppet valve core sets
There is the right shoulder of a radial direction anchor ring；Described right shoulder be radially provided with right shoulder radial hole, the right-hand member of right shoulder has the right side
The shoulder conical surface；Described right shoulder radial hole is connected with right cone valve core bore；The angle of the described right shoulder conical surface is less than the angle of cone machine hole
Degree.
At nearly left oil port T described in technique scheme, there is left pressure release inclined hole；At described nearly right oil port T, there is right pressure release oblique
Hole.
After technique scheme, the present invention has following positive effect：
The present invention can apply in loading machine movable arm cylinder, excavator swing arm, bucket arm cylinder etc., the mistake that piston moves downward
Cheng Zhong, can limit piston falling speed, and the potential energy that piston is acted on by mechanism and material gravity uses, and realizes the energy
Regeneration.
Brief description
In order that present disclosure is easier to be clearly understood, below according to specific embodiment and combine accompanying drawing, right
The present invention is described in further detail, wherein
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the valve element of the present invention；
Fig. 3 is the structural representation of the left valve seat of the present invention；
Fig. 4 is the structural representation of the left poppet valve core of the present invention；
Fig. 5 is the structural representation of the right valve seat of the present invention；
Fig. 6 is the structural representation of the right poppet valve core of the present invention；
Fig. 7 is the structure principle chart of the present invention；
Drawing reference numeral is：End cap 1, valve element 2, thick centre bore 2-1, small center hole 2-2, cone machine hole 2-3, left meter in groove
2-4, right meter in groove 2-5, left throttling channel 2-6, left first segment discharge orifice 2-7, left second throttle orifice 2-8, left 3rd throttle orifice
2-9, right throttling channel 2-10, right first segment discharge orifice 2-11, right second throttle orifice 2-12, right 3rd throttle orifice 2-13, left check valve
3rd, left valve seat 3-1, left first annular groove 3-1-1, left second annular groove 3-1-2, left first seal groove 3-1-3, left second sealing
Groove 3-1-4, left valve base center hole 3-1-5, left valve seat radial hole 3-1-6, left sealing ring 3-1-7, left poppet valve core 3-2, left spring
Hole 3-2-1, left cone valve core bore 3-2-2, left shoulder 3-2-3, left shoulder radial hole 3-2-4, left spring 3-3, right check valve 4, the right side
Valve seat 4-1, right first annular groove 4-1-1, right second annular groove 4-1-2, right first seal groove 4-1-3, right second seal groove 4-
1-4, right valve base center hole 4-1-5, right valve seat radial hole 4-1-6, right sealing ring 4-1-7, right poppet valve core 4-2, right spring eye 4-
2-1, right cone valve core bore 4-2-2, right shoulder 4-2-3, right shoulder radial hole 4-2-4, right spring 4-3, spring 5, spring base 6, a left side
Pressure release inclined hole 7, right pressure release inclined hole 8.
Specific embodiment
（Embodiment 1）
See Fig. 1, a kind of hydraulic control main valve of energy recycling, there is end cap 1, valve element 2, left check valve 3 and right list
To valve 4；The two ends of valve element 2 are equipped with an end cap 1, and valve element 2 has left oil port T, hydraulic fluid port A, hydraulic fluid port I/L, hydraulic fluid port I/M, oil
Mouth I/R, hydraulic fluid port B, right oil port T and hydraulic fluid port P；It is equipped with spring 5 and spring base 6 between end cap 1 and valve element 2；The left and right two of valve element 2
End is embedded with left check valve 3 and right check valve 4 respectively；Left check valve 3 is by left valve seat 3-1, left poppet valve core 3-2 and left spring 3-3 group
Become；The conical surface of left poppet valve core 3-2 is close on the left conical surface of valve element 2 by the effect of left spring 3-3；Right check valve 4 is by right valve
Seat 4-1, right poppet valve core 4-2 and right spring 4-3 composition；The conical surface of right poppet valve core 4-2 is close to valve by the effect of right spring 4-3
On the right conical surface of core 2.There is at nearly left oil port T the left pressure release inclined hole 7 of two settings symmetrical above and below；Two are had at nearly right oil port T
The right pressure release inclined hole 8 of individual setting symmetrical above and below；
See Fig. 2, the centrage of valve element 2 has the thick centre bore 2-1 being symmetrical set；Left and right two thick centre bore 2-1
Between connected by small center hole 2-2, the junction of thick centre bore 2-1 and small center hole 2-2 has cone machine hole 2-3；Hydraulic fluid port P and
It is provided with left meter in groove 2-4 and right meter in groove 2-5 between hydraulic fluid port I/M；It is provided with left throttling between hydraulic fluid port A and hydraulic fluid port I/L
Groove 2-6；It is provided between left oil port T and hydraulic fluid port I/L by left first segment discharge orifice 2-7, left second throttle orifice 2-8 and left 3rd throttle orifice
The left spill port group of 2-9 composition；Left second throttle orifice 2-8 is communicated with hydraulic fluid port A；It is provided with right throttling channel between hydraulic fluid port B and hydraulic fluid port I/R
2-10；It is provided with right first segment discharge orifice 2-11, right second throttle orifice 2-12 and right 3rd throttle orifice between right oil port T and hydraulic fluid port I/R
The right spill port group of 2-13 composition；Right second throttle orifice 2-12 and right 3rd throttle orifice 2-13 is all communicated with hydraulic fluid port B.
See Fig. 3, the circumference of left valve seat 3-1 is provided with left first annular groove 3-1-1, left second annular groove 3-1-2, a left side first
Seal groove 3-1-3 and left second seal groove 3-1-4, the centrage of left valve seat 3-1 is provided with left valve base center hole 3-1-5；Left the
Two left valve seat radial hole 3-1-6 that one annular groove 3-1-1 passes through to be radially arranged are connected with left valve base center hole 3-1-5；Left the
It is equipped with sealing ring 3-1-7 in one seal groove 3-1-3 and left second seal groove 3-1-4；
See Fig. 5, the circumference of right valve seat 4-1 is provided with right first annular groove 4-1-1, right second annular groove 4-1-2, the right side first
Seal groove 4-1-3 and right second seal groove 4-1-4, the centrage of right valve seat 4-1 is provided with right valve base center hole 4-1-5；Right the
The right valve seat radial hole 4-1-6 that one annular groove 4-1-1 passes through to be radially arranged is connected with right valve base center hole 4-1-5；Right the
It is equipped with sealing ring 4-1-7 in one seal groove 4-1-3 and right second seal groove 4-1-4.
See Fig. 4, the left spring hole 3-2-1 that the centrage of left poppet valve core 3-2 is communicated with and left cone valve core bore 3-2-2,
The right-hand member of left poppet valve core 3-2 is provided with the left shoulder 3-2-3 of a radial direction anchor ring；Left shoulder 3-2-3 is radially provided with Yi Zuotai
Shoulder radial hole 3-2-4, the right-hand member of left shoulder 3-2-3 has a left shoulder conical surface；Left shoulder radial hole 3-2-4 and left poppet valve core
Hole 3-2-2 connects；The angle of the left shoulder conical surface is less than the angle of cone machine hole；
See Fig. 6, the right spring eye 4-2-1 that the centrage of right poppet valve core 4-2 is communicated with and right cone valve core bore 4-2-2,
The right-hand member of right poppet valve core 4-2 is provided with the right shoulder 4-2-3 of a radial direction anchor ring；Right shoulder 4-2-3 is radially provided with two right sides
The right-hand member of shoulder radial hole 4-2-4, right shoulder 4-2-3 has a right shoulder conical surface；Right shoulder radial hole 4-2-4 and right cone valve
Core bore 4-2-2 connects；The angle of the right shoulder conical surface is less than the angle of cone machine hole.
After in valve core 2, left check valve 3 and right check valve 4 are respectively installed in both sides, two left sealing ring 3-1-7 are respectively left first
Annular groove 3-1-1 and left second annular groove 3-1-2 isolation, left second annular groove 3-1-2 and left throttling channel 2-6 isolation；Two right sides
Sealing ring 4-1-7 respectively right first annular groove 4-1-1 and right second annular groove 4-1-2 isolation, right second annular groove 4-1-2 and
Right throttling channel 2-10 isolation；Left 3rd throttle orifice 2-9 is L2 with the plus lap amount of valve body, and left pressure release inclined hole 7 is just heavy with valve body
Folded amount is L1；Left 3rd throttle orifice 2-9, left throttling channel 2-6, left cone valve core bore 3-2-2, left shoulder radial hole 3-2-4, left valve seat
Centre bore 3-1-5, two left valve seat radial hole 3-1-6, left pressure release inclined hole 7 leads to into a passage；Right first segment discharge orifice 2-11, right throttling
Groove 2-10, right shoulder radial hole 4-2-4, right cone valve core bore 4-2-2, right valve base center hole 4-1-5, right valve seat radial hole 4-1-6,
Right pressure release inclined hole 8 also leads to into a passage.
The operation principle of the present invention is：
When valve element 2 commutates to L position：Operation principle is as follows：Hydraulic fluid port P passes through meter in groove 2-4, flows at hydraulic fluid port I/L, then
Flow into hydraulic fluid port A through throttling channel 2-6, a part of fluid can be flowed at hydraulic fluid port I/L by left 3rd throttle orifice 2-9 simultaneously
At left throttling channel 2-6, fluid connects left cone valve core bore 3-2-2, left valve base center hole 3-1-5, a left side by left shoulder radial hole 3-2-4
Valve seat radial hole 3-1-6, left first annular groove 3-1-1, left pressure release inclined hole 7, and blocked, oblique to left pressure release at hydraulic fluid port I/L
Hole 7 pressure size is equal, because left poppet valve core 3-2 circular section r3 is more much bigger than anchor ring r1, so the cone on left poppet valve core 3-2
Face is tightly pushed to and is close on the conical surface of valve element 2, is reliably applied to oil cylinder rodless cavity from hydraulic fluid port P, shifts oil cylinder onto and lives
Plug moves upwards；The fluid of oil cylinder piston rod cavity is back to hydraulic fluid port B, flows into right second throttle orifice 2-12, right first annular groove 4-
1-1, flows to hydraulic fluid port T by right 3rd throttle orifice 2-13, and another part fluid can be flowed from hydraulic fluid port B by right first segment discharge orifice 2-11
To right throttling channel 2-10, right shoulder radial hole 4-2-4, right cone valve core bore 4-2-2, right valve base center hole 4-1-5, finally by the right side
Pressure release inclined hole 8 flows to hydraulic fluid port T, this process, and the conical surface on right poppet valve core 4-2 is close on the conical surface of valve element 2.
When valve element 2 commutates to R position：Hydraulic fluid port P, by right meter in groove 2-5, flows at hydraulic fluid port I/R, then through right throttling
Groove 2-10 flows into hydraulic fluid port B, and a part of fluid can pass through right first segment discharge orifice 2-11 simultaneously, is flowed into right throttling at hydraulic fluid port I/R
At groove 2-10, fluid connects right cone valve core bore 4-2-2, right valve base center hole 4-1-5, the right side by two right shoulder radial hole 4-2-4 again
Valve seat radial hole 4-1-6, right second annular groove 4-1-2, right pressure release inclined hole 8, eventually flow into fuel tank, due to two right shoulder radial holes
4-2-4 area is bigger than right valve seat radial hole 4-1-6, and basic of this part of fluid is in the front end of right valve seat radial hole 4-1-6
Produce identical pressure, due to acting on the circular section r4 of right poppet valve core 4-2, act on the anchor ring r2 of right poppet valve core 4-2
Hydraulic pressure force direction and right spring 4-3 be all the conical surface P2 on right poppet valve core 4-2 tightly to be pushed to and is close to the conical surface of valve element 2
On P4.So that the fluid of hydraulic fluid port P is only applied in cylinder piston rod rod cavity, promote oil cylinder piston to move downward；
The fluid in oil cylinder piston chamber is back to A hydraulic fluid port, flows into left second throttle orifice 2-8, left second annular groove 3-1-2, leads to
Cross left first segment discharge orifice 2-7 and flow to hydraulic fluid port T, by limiting left first segment discharge orifice 2-7 area of passage, make oil return in left first throttle
Hole 2-7 produces back pressure p1, prevents piston stall from falling, and another part fluid can be by left throttling channel 2-6 from hydraulic fluid port A simultaneously
Place flows to left throttling channel 2-6, right valve seat radial hole 4-1-6, right shoulder radial hole 4-2-4, left valve base center hole 3-1-5, and left the
One annular groove 3-1-1 flows to hydraulic fluid port T finally by right pressure release inclined hole 8, this process, due to right shoulder radial hole 4-2-4 area
Smaller, make oil return produce back pressure p2 in right shoulder radial hole 4-2-4, by the fluid of right shoulder radial hole 4-2-4
Smaller, and left cone valve core bore 3-2-2 hereafter, left valve base center hole 3-1-5, left first annular groove 3-1-1 is finally by the right side
Pressure release inclined hole 8 area right shoulder radial hole 4-2-4 of ratio, fluid so, can act on a left side with zero pressure stream oil return inlet T substantially
On poppet valve core 3-2, anchor ring r1, in the presence of p2, just can overcome left spring 3-3, so that the conical surface P2 on left poppet valve core 3-2 is divided
From the conical surface P1 of valve element 2, the fluid of left throttling channel 2-6 just can flow to small center hole 2-2 with the pressure of p1, and p1 acts on right cone
Right spring 4-3 is overcome to make the conical surface P4 on right poppet valve core 4-2 separate the conical surface P3 on valve element 2, small center on valve element 4-2 left side
Fluid in the 2-2 of hole also just can pass through right throttling channel 2-10, right first segment discharge orifice 2-11, flows ultimately into hydraulic fluid port B, with hydraulic fluid port
The fluid of P promotes piston to move downward it is achieved that energy regeneration together, reduces engine power.When decrease speed is slow
When, p1 just cannot promote and overcome right spring 4-3 so that the conical surface P4 on right poppet valve core 4-2 is separated on right poppet valve core 4-2 left side
Conical surface P3 on valve element 2, does not affect the micromotion of oil cylinder.
Particular embodiments described above, has carried out detailed further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, be should be understood that the specific embodiment that the foregoing is only the present invention, be not limited to the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement done etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (5)
1. a kind of energy recycling hydraulic control main valve it is characterised in that：There is end cap (1), valve element (2), left check valve
And right check valve (4) (3)；The two ends of described valve element (2) are equipped with an end cap (1), and valve element has left oil port T, hydraulic fluid port on (2)
A, hydraulic fluid port I/L, hydraulic fluid port I/M, hydraulic fluid port I/R, hydraulic fluid port B, right oil port T and hydraulic fluid port P；It is equipped between described end cap (1) and valve element (2)
Spring (5) and spring base (6)；The left and right two ends of described valve element (2) are embedded with left check valve (3) and right check valve (4) respectively；Described
Left check valve (3) is made up of left valve seat (3-1), left poppet valve core (3-2) and left spring (3-3)；The cone of described left poppet valve core (3-2)
Face is close on the left conical surface of valve element (2) by the effect of left spring (3-3)；Described right check valve (4) by right valve seat (4-1),
Right poppet valve core (4-2) and right spring (4-3) composition；The conical surface of described right poppet valve core (4-2) is tight by the effect of right spring (4-3)
It is attached on the right conical surface of valve element (2).
2. energy recycling according to claim 1 hydraulic control main valve it is characterised in that：Described valve element (2)
Thick centre bore (2-1) is had on centrage；Thick centre bore (2-1) is located at right position, logical between the thick centre bore in left and right (2-1)
Meticulous centre bore (2-2) connection, thick centre bore (2-1) has cone machine hole (2-3) with the junction in small center hole (2-2)；Described
It is provided with left meter in groove (2-4) and right meter in groove (2-5) between hydraulic fluid port P and hydraulic fluid port I/M；Described hydraulic fluid port A and hydraulic fluid port I/L
Between be provided with left throttling channel (2-6)；It is provided between described left oil port T and hydraulic fluid port I/L by left first segment discharge orifice (2-7), a left side second
The left spill port group that throttle orifice (2-8) and left 3rd throttle orifice (2-9) form；Described left second throttle orifice (2-8) and hydraulic fluid port A phase
Logical；It is provided with right throttling channel (2-10) between described hydraulic fluid port B and hydraulic fluid port I/R；It is provided with right the between described right oil port T and hydraulic fluid port I/R
The right spill port group that one throttle orifice (2-11), right second throttle orifice (2-12) and right 3rd throttle orifice (2-13) form；The described right side
Second throttle orifice (2-12) and right 3rd throttle orifice (2-13) are all communicated with hydraulic fluid port B.
3. energy recycling according to claim 2 hydraulic control main valve it is characterised in that：Described left valve seat (3-
1) circumference is provided with left first annular groove (3-1-1), left second annular groove (3-1-2), left first seal groove (3-1-3) and a left side
Second seal groove (3-1-4), the centrage of left valve seat (3-1) is provided with left valve base center hole (3-1-5)；Described left first annulus
Groove (3-1-1) is connected with left valve base center hole (3-1-5) by being radially arranged left valve seat radial hole (3-1-6)；Described left first
It is equipped with left sealing ring (3-1-7) in seal groove (3-1-3) and left second seal groove (3-1-4)；
The circumference of described right valve seat (4-1) is provided with right first annular groove (4-1-1), right second annular groove (4-1-2), the right side first
Seal groove (4-1-3) and right second seal groove (4-1-4), the centrage of right valve seat (4-1) is provided with right valve base center hole (4-1-
5)；Described right first annular groove (4-1-1) is by being radially arranged right valve seat radial hole (4-1-6) and right valve base center hole (4-1-
5) connect；It is equipped with right sealing ring (4-1-7) in described right first seal groove (4-1-3) and right second seal groove (4-1-4).
4. energy recycling according to claim 3 hydraulic control main valve it is characterised in that：Described left poppet valve core
(3-2) the left spring hole (3-2-1) being communicated with centrage and left cone valve core bore (3-2-2), the right side of left poppet valve core (3-2)
End is provided with the left shoulder (3-2-3) of a radial direction anchor ring；The radial direction of described left shoulder (3-2-3) sets left shoulder radial hole (3-
2-4), the right-hand member of left shoulder (3-2-3) has a left shoulder conical surface；Described left shoulder radial hole (3-2-4) and left poppet valve core
Hole (3-2-2) connects；The angle of the described left shoulder conical surface is less than the angle of cone machine hole；
The right spring eye (4-2-1) being communicated with the centrage of described right poppet valve core (4-2) and right cone valve core bore (4-2-2),
The right-hand member of right poppet valve core (4-2) is provided with the right shoulder (4-2-3) of a radial direction anchor ring；The radial direction of described right shoulder (4-2-3)
It is provided with right shoulder radial hole (4-2-4), the right-hand member of right shoulder (4-2-3) has the right shoulder conical surface；Described right shoulder radial hole (4-
2-4) connect with right cone valve core bore (4-2-2)；The angle of the described right shoulder conical surface is less than the angle of cone machine hole.
5. energy recycling according to claim 4 hydraulic control main valve it is characterised in that：At described left oil port T
There is left pressure release inclined hole (7)；There is at described right oil port T right pressure release inclined hole (8).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310363059.2A CN104235096B (en) | 2013-08-19 | 2013-08-19 | Hydraulic-control main valve for energy recycling |
| PCT/CN2013/001430 WO2015024152A1 (en) | 2013-08-19 | 2013-11-22 | Energy-recycling hydraulic control main valve |
| JP2015561877A JP6117385B2 (en) | 2013-08-19 | 2013-11-22 | Hydraulic control main valve used for energy reuse |
| EP13891811.5A EP2944828B1 (en) | 2013-08-19 | 2013-11-22 | Energy-recycling hydraulic control main valve |
| US14/818,331 US9791056B2 (en) | 2013-08-19 | 2015-08-05 | Energy-recycling hydraulic control main valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310363059.2A CN104235096B (en) | 2013-08-19 | 2013-08-19 | Hydraulic-control main valve for energy recycling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104235096A CN104235096A (en) | 2014-12-24 |
| CN104235096B true CN104235096B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310363059.2A Active CN104235096B (en) | 2013-08-19 | 2013-08-19 | Hydraulic-control main valve for energy recycling |
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| CN (1) | CN104235096B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6647826B2 (en) * | 2015-09-29 | 2020-02-14 | ナブテスコ株式会社 | Directional valve and hydraulic system |
| CN106873463B (en) * | 2017-03-21 | 2023-09-01 | 江苏恒立液压股份有限公司 | Proportional valve measurement and control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3411521A (en) * | 1966-07-14 | 1968-11-19 | Caterpillar Tractor Co | Hydraulically stabilized double-acting pilot-operated load check valves |
| DE4413216C2 (en) * | 1994-04-15 | 2003-02-06 | Bosch Gmbh Robert | Hydraulic directional valve |
| CN201281051Y (en) * | 2008-10-08 | 2009-07-29 | 贵州枫阳液压有限责任公司 | Speed governing change valve |
| CN201306326Y (en) * | 2008-11-17 | 2009-09-09 | 天津玖丰重工机械有限公司 | Hydraulic multichannel conversion valve |
| CN201636106U (en) * | 2010-04-16 | 2010-11-17 | 山东泰丰液压设备有限公司 | Oil returning and throttling multiple directional control valve with pressure compensation |
| CN203488465U (en) * | 2013-08-19 | 2014-03-19 | 江苏恒立液压有限公司 | Energy recycled hydraulic control main valve |
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2013
- 2013-08-19 CN CN201310363059.2A patent/CN104235096B/en active Active
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