CN110360174A - Valve body, valve rod assembly, balanced valve and the flexible control loop of hydraulic cylinder of balanced valve - Google Patents
Valve body, valve rod assembly, balanced valve and the flexible control loop of hydraulic cylinder of balanced valve Download PDFInfo
- Publication number
- CN110360174A CN110360174A CN201910517221.9A CN201910517221A CN110360174A CN 110360174 A CN110360174 A CN 110360174A CN 201910517221 A CN201910517221 A CN 201910517221A CN 110360174 A CN110360174 A CN 110360174A
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- valve
- shaft part
- valve rod
- oil
- valve body
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/82—Luffing gear
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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
- F15B13/026—Pressure compensating valves
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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
- F15B13/16—Special measures for feedback, e.g. by a follow-up device
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The present invention relates to balanced valve fields, disclose valve body, valve rod assembly, balanced valve and the flexible control loop of hydraulic cylinder of a kind of balanced valve, valve body (100) includes the control port (X) and hollow cavity (110) for valve rod assembly to be arranged and communicates with each other, hollow cavity includes that the second oil pocket forming portion of the second oil pocket (400) is used to form when valve rod assembly is assembled in hollow cavity, and load pressure feedback oil duct (L is equipped in valve bodyS), the Single port of load pressure feedback oil duct is connected to the second oil pocket forming portion, the another port of load pressure feedback oil duct is used to be connected to the load pressure feedback chamber (500) that the internal capacity for the valve rod assembly being arranged in hollow cavity can be changed, and valve body is equipped with the reverse port (B) being connected to the second oil pocket forming portion.The present invention realizes the flow-compensated of in decentralization process balanced valve, to make luffing at the uniform velocity or slow down, the more comfortable safety of luffing operation by load pressure feedback oil duct.
Description
Technical field
The present invention relates to balanced valve technical field, more particularly to the valve body of balanced valve, valve rod assembly, balanced valve and hydraulic
Cylinder expansion control loop.
Background technique
Variable amplitude hydraulic system is an important component in crane, and balanced valve is crane amplitude variation hydraulic pressure system
A core component in system, it to the decline of hanging object, fall arm and contracting arm plays the role of speed limit, be mainly used for effectivelying prevent transferring
The movement speed of boom is out of control when weight, while weight and boom being made to be maintained at a certain position in space to fulfil assignment.It is existing
Variable amplitude hydraulic system in operation process, when boom decline when, as load is gradually increased, derricking speed can gradually be accelerated,
Even occur boom directly falls with crane body hit the problem of, either boom decentralization act uniformity, go back
It is that the fine motion that boom acts in operation process is all poor.
Summary of the invention
When the purpose of the invention is to overcome luffing of the existing technology to decline, big angle spends that slow, low-angle is too fast
The problem of, a kind of valve body of balanced valve is provided, the flow of the balanced valve in decentralization process is realized by load pressure feedback oil duct
Compensation, thus make luffing at the uniform velocity or slow down, the more comfortable safety of luffing operation.
To achieve the goals above, one aspect of the present invention provides a kind of valve body of balanced valve, including valve body, the valve body packet
The control port and hollow cavity for valve rod assembly to be arranged and communicates with each other are included, the hollow cavity is included in valve rod assembly and is assembled to
It is used to form the second oil pocket forming portion of the second oil pocket when in the hollow cavity, load pressure feedback oil is equipped in the valve body
Road, the Single port of the load pressure feedback oil duct are connected to the second oil pocket forming portion, the load pressure feedback oil duct
Another port be used for the internal capacity for the valve rod assembly being arranged in hollow cavity can be changed load pressure feedback chamber be connected to, institute
It states valve body and is equipped with the reverse port being connected to the second oil pocket forming portion.
Preferably, be formed in the valve body be connected to the hollow cavity be used for and in the valve rod assembly first oil
The positive port of chamber connection.
Preferably, be formed with rodless cavity oil suction chamber in the valve body, the rodless cavity oil suction chamber respectively with the forward end
Mouth is connected to the reverse port, is equipped in the rodless cavity oil suction chamber for preventing oil liquid from described in reverse port flow direction
The check valve of positive port.
Preferably, it is formed on the inner peripheral surface of the hollow cavity and is respectively formed with the first annular groove and the second annular groove；Described first
Annular groove with first oil pocket for being connected to；Second annular groove with the load pressure feedback chamber for being connected to.
Second aspect of the present invention provides a kind of valve rod assembly, and the valve rod assembly is for being assembled to balanced valve as described above
Valve body control port and hollow cavity in, the valve rod assembly includes valve rod, valve pocket and the wedge angle being set on the valve rod
Valve seat, the valve rod can be axially movably arranged in the valve pocket, and variable volume is formed between the valve rod and valve pocket
Load pressure feedback chamber is formed with the oilhole being connected to the load pressure feedback chamber on the valve pocket；The load pressure is anti-
Feedback chamber is connected to by the oilhole with the another port of the load pressure feedback oil duct of the valve body of balanced valve as described above.
Preferably, the valve rod includes the first shaft part and the second shaft part, and the diameter of first shaft part is greater than described second
The diameter of shaft part includes preceding shaft part and rear shaft part in second shaft part, and the preceding shaft part and rear shaft part are separately positioned on described
The arranged on left and right sides of first shaft part, both the preceding shaft part and the rear shaft part are isometrical.
Preferably, the setting position of first oil pocket, the second oil pocket and load pressure feedback chamber respectively with the valve rod
First shaft part, the setting position of preceding shaft part and rear shaft part it is corresponding.
Preferably, along the junction of the preceding shaft part and first shaft part, the edge on the outer peripheral surface of first shaft part
Circumferentially-spaced to be provided with multiple throttling channels, the throttling channel is axially extending along first shaft part, and depth is from the front axle
Section gradually becomes smaller to first shaft part direction.
Third aspect present invention provides a kind of balanced valve, and including valve body as described above, the valve body side is arranged in
Piston component, valve rod assembly as described above and main spring chamber component；The valve is set on the wedge angle valve seat and the master
Between spring cavity component；The piston component includes end cap, and the cavity for accommodating piston mechanism is equipped in the end cap, described
Piston mechanism is slidably fixed in the cavity, and the top of the valve rod is protruded into the cavity by the control port；
The other side of the valve body and the main spring chamber component are tightly connected, and the main spring chamber component is protruded into the end of the valve rod
Inside cavity and with the main spring chamber component slidable connection.
Preferably, the wedge angle valve seat is set on the valve rod is correspondingly arranged with the throttling channel, the valve rod edge
Axial left and right sliding, realizes second oil pocket and first by the throttling channel between the valve rod and the wedge angle valve seat
The flow of barrier, connection and oil liquid between oil pocket adjusts.
Preferably, the main spring chamber component includes swivel nut, and main spring chamber, the main spring are formed with inside the swivel nut
Main spring seat and locking assembly are equipped in chamber, main spring is set on the main spring seat and supports with the locking assembly, institute
The end and the main spring seat for stating valve rod are supported.
Fourth aspect present invention provides a kind of flexible control loop of hydraulic cylinder, and the hydraulic cylinder includes rod chamber and without bar
Chamber, the rod chamber and rodless cavity pass through the first working oil path respectively and the second working oil path is connected to reversal valve, the commutation
Valve is connected to oil inlet circuit and oil return circuit, and second working oil path is equipped with balanced valve, and the balanced valve is as described above
Balanced valve, the positive port of the balanced valve is connected to the reversal valve, and the reverse port is connected to described hydraulic
The rodless cavity of cylinder, the control port pass through a piston component and pilot control oil circuit connection.
Through the above technical solutions, the present invention is realized by the way that load pressure feedback oil duct is arranged on the valve body of balanced valve
Balanced valve is flow-compensated in decentralization process, thus make luffing at the uniform velocity or slow down, the more comfortable safety of luffing operation.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of balanced valve of the present invention；
Fig. 2 is that the oil circuit of balanced valve of the present invention flows to schematic diagram；
Fig. 3 is the schematic cross-sectional view of valve rod of the present invention.
Description of symbols
100 valve body, 110 hollow cavity, 111 first annular groove
112 second annular groove, 120 rodless cavity oil suction chamber, 210 wedge angle valve seat
201 valve rod, 202 valve pocket, 2,011 first shaft part
2014 throttling channel of shaft part after shaft part 2013 before 2012
2021 oilhole, 300 first oil pocket, 400 second oil pocket
500 load pressure feedback chamber, 600 check valve, 710 swivel nut
720 main spring seat, 730 locking assembly, 740 main spring
A forward direction port B reverse port X control port
LSLoad pressure feedback oil duct
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " typically refers to
With reference to upper and lower, left and right shown in the drawings；" inside and outside " typically refers to inside and outside the profile relative to each component itself；" remote, close "
Typically refer to the distance of the profile relative to each component itself.
Such as Fig. 1 and as shown in connection with fig. 2, one aspect of the present invention provides a kind of valve body of balanced valve, including valve body 100, described
Valve body 100 includes the control port X and hollow cavity 110 for valve rod assembly to be arranged and communicates with each other, and the hollow cavity 110 includes
The second oil pocket forming portion of the second oil pocket 400, the valve body are used to form when valve rod assembly is assembled in the hollow cavity 110
Load pressure feedback oil duct L is equipped in 100S, the load pressure feedback oil duct LSSingle port and the second oil pocket forming portion
Connection, the load pressure feedback oil duct LSAnother port for inside with the valve rod assembly being arranged in hollow cavity 110
The load pressure feedback chamber 500 of variable volume is connected to, and the valve body 100 is anti-equipped with being connected to the second oil pocket forming portion
To port B.Preferably, be formed in the valve body 100 be connected to the hollow cavity 110 for in the valve rod assembly
The positive port A of first oil pocket 300 connection.In addition, being formed with rodless cavity oil suction chamber 120, the rodless cavity in the valve body 100
Oil suction chamber 120 is connected to the forward direction port A and reverse port B respectively, is equipped with and is used in the rodless cavity oil suction chamber 120
Prevent oil liquid from flowing to the check valve 600 of the forward direction port A from the reverse port B.Divide on the inner peripheral surface of the hollow cavity 110
It is not formed with the first annular groove 111 and the second annular groove 112, first annular groove 111 with first oil pocket 300 for being connected to, institute
The second annular groove 112 is stated for being connected to the load pressure feedback chamber 500.In order to facilitate the setting of oil pocket and oil duct, it is preferable that
The hollow cavity 110 and the rodless cavity oil suction chamber 120 are arranged in parallel in the valve body 100.
As shown in Figure 1, Figure 2 and as shown in connection with fig. 3, second aspect of the present invention provides a kind of valve rod assembly, and the valve rod assembly is used
In in the control port X and hollow cavity 110 of valve body 100 for being assembled to balanced valve as described above, the valve rod assembly includes valve
Bar 201, valve pocket 202 and the wedge angle valve seat 210 being set on valve rod 201, the valve rod 201 can be axially movably arranged at institute
It states in valve pocket 202, forms the load pressure feedback chamber 500 of variable volume, the valve pocket between the valve rod 201 and valve pocket 202
The oilhole 2021 being connected to the load pressure feedback chamber 500 is formed on 202, the load pressure feedback chamber 500 passes through institute
State the load pressure feedback oil duct L of the valve body 100 of oilhole 2021 and balanced valve as described aboveSAnother port connection.
As shown in connection with fig. 3, the valve rod 201 includes the first shaft part 2011 and the second shaft part, first shaft part 2011
Diameter is greater than the diameter of second shaft part, includes preceding shaft part 2012 and rear shaft part 2013, the front axle in second shaft part
Section 2012 and rear shaft part 2013 are separately positioned on the arranged on left and right sides of first shaft part, the preceding shaft part 2012 and the rear axle
Both sections 2013 are isometrical.As shown in Figure 1, Figure 2, preferably, first oil pocket 300, the second oil pocket 400 and load pressure are anti-
Present chamber 500 setting position respectively with first shaft part 2011 of the valve rod 201, preceding shaft part 2012 and rear shaft part 2013
It is corresponding that position is set.As shown in connection with fig. 3, it is preferable that along the junction of the preceding shaft part 2012 and first shaft part 2011,
On the outer peripheral surface of first shaft part 2011 circumferentially on be arranged at intervals with multiple throttling channels 2014,2014 edge of throttling channel
First shaft part 2011 it is axially extending, depth gradually becomes from the preceding shaft part 2012 to 2011 direction of the first shaft part
It is small, it may be assumed that the depth of throttling channel 2014 from left to right gradually becomes shallower as on valve rod 201, orifice size or for cross-section flow area with
Be gradually reduced.
As shown in Figure 1, Figure 2, third aspect present invention provides a kind of balanced valve, including valve body as described above 100, set
Set the piston component, valve rod assembly as described above and main spring chamber component in 100 side of valve body.The valve pocket 202 is set
It sets between the wedge angle valve seat 210 and the main spring chamber component.The piston component includes end cap 810, the end cap 810
The interior cavity 830 being equipped with for accommodating piston mechanism 820, the piston mechanism 820 are slidably fixed in the cavity 830,
The top of the valve rod 201 is protruded into the cavity 830 by the control port X.The other side of the valve body 100 with it is described
Main spring chamber component be tightly connected, the end of the valve rod 201 protrude into the inside cavity of the main spring chamber component and with it is described
Main spring chamber component slidable connection.
The wedge angle valve seat 210 is set on the valve rod 201 and is correspondingly arranged with the position of the throttling channel 2014, institute
State valve rod 201 along axial left and right sliding, between the valve rod 201 and the wedge angle valve seat 210 in fact by the throttling channel 2014
The flow adjustment of barrier, connection and oil liquid between existing second oil pocket 400 and the first oil pocket 300.
Further, the main spring chamber component includes swivel nut 710, is formed with main spring chamber inside the swivel nut 710
750, main spring seat 720 and locking assembly 730 are equipped in the main spring chamber 750, main spring 740 is set in the main spring seat
It is supported on 720 and with the locking assembly 730, the end of the valve rod 201 is supported with the main spring seat 720.
Below in conjunction with above structure, several working conditions of balanced valve provided by the present invention are carried out in detail respectively
It is bright.
Boom lifts state
When boom needs to lift, oil liquid is out of, positive port A enters balanced valve valve body 100, and check valve 600 is single at this time
To conducting, oil liquid enters rodless cavity oil suction chamber 120, boom lifting by reverse port B, and valve rod 201 is engaged with wedge angle valve seat 210
Place is formed by conical surface wedge angle and keeps sealing state, in the first oil pocket 300, the second oil pocket 400 and load pressure feedback chamber 500
Oil liquid remain stationary state without flowing.Increase with the oil liquid inside the valve body 100 of balanced valve is entered from positive port A, hangs
Arm constantly lifts.
Load hold mode
When boom gives rise to predetermined altitude, it is no longer necessary to continue to lift, at this point, the oil inlet movement at forward direction port A stops
Only, the pressure of rodless cavity oil liquid acts on the throttling channel 2014 of check valve 600 and valve rod, and check valve 600 is reversely closed, effect
In throttling channel 2014 power less than the spring force of 740 main springs, valve rod 201 and 210 joint of wedge angle valve seat are formed by the conical surface
Wedge angle persistently keeps sealing state.
Boom falling state
When boom needs to decline from the predetermined altitude of lifting, after control oil enters end cap 810 by piston component, push
Piston mechanism 820 is in cavity 830 towards the direction of valve rod 201, it may be assumed that moves right.It is stretched by control port X on 201 top of valve rod
Enter in cavity 830, and keep certain distance between the top of valve rod 201, as piston mechanism 820 moves right and valve rod
201 tip contact simultaneously pushes valve rod 201 mobile to main spring chamber 750.At this point, close between valve rod 201 and wedge angle valve seat 210
Sealing-in touching is opened.When the luffing elevation angle increases, rodless cavity load pressure is lower, and the oil liquid in rodless cavity is through reverse port B, with valve
The mobile direction of bar 201 is finally back to fuel tank (not shown) by throttling channel 2014 through positive port A to reversal valve.
As shown in Fig. 2, the arrow direction in Fig. 2 is the flow direction of oil liquid.In the above-mentioned course of work, hydraulic cylinder exists
When retracting toward lower swing, with the reduction of change angle, load pressure is constantly increased, and the pressure at reverse port B increases,
Pressure difference between positive port A and reverse port B increases, and the pressure difference of increase pushes valve rod 201 to move to 750 direction of main spring chamber
It is dynamic.Due to being equipped with pressure feedback oil duct between the second oil pocket 400 and load pressure feedback chamber 500 of valve body 100 in the present invention
Ls, when 400 pressure of the second oil pocket increases, while pushing valve rod 201 to move right, the pressure oil warp of the second oil pocket 400
Load pressure feedback oil duct Ls, through oilhole 2021 enter load pressure feedback chamber 500, by pressure feedback valve rod 201 right end,
Valve rod 201 obtains the power closed to the left, and valve rod 201 is made to have the tendency that closing to the left, valve rod 201 and wedge angle valve seat 210 it
Between opening area reduce therewith, meanwhile, under the action of hydraulic power, the second oil pocket 400 passes through the oil liquid stream of throttling channel 2014
Amount reduces, and realizes the overcompensation discharge characteristic for the hour of falling change angle.As shown in connection with fig. 3, when the load pressure of the second oil pocket 400
When lower, the above structure setting based on throttling channel 2014 slows down the speed of flow rising to a certain extent；And when load
When pressure gradually rises, feedback pressure chamber is fed back to, valve rod 201 is moved to the left, at this point, orifice size is also gradually reduced.
Fourth aspect present invention provides a kind of flexible control loop of hydraulic cylinder, and the hydraulic cylinder includes rod chamber and without bar
Chamber, the rod chamber and rodless cavity pass through the first working oil path respectively and the second working oil path is connected to reversal valve, the commutation
Valve is connected to oil inlet circuit and oil return circuit, and second working oil path is equipped with balanced valve, and the balanced valve is as described above
Balanced valve, the forward direction port A of the balanced valve is connected to the reversal valve, and the reverse port B is connected to the liquid
The rodless cavity of cylinder pressure, the control port X pass through a piston component and pilot control oil circuit connection.
In conclusion the purpose of the present invention is spending slow, the too fast problem of low-angle to improve luffing decline big angle, in valve body
Rodless cavity load high pressure is directly fed back to pressure feedback chamber by middle setting pressure feedback oil duct, and feedback pressure makes valve rod tend to close
It closes, realizes flow compensation of the luffing balanced valve in decentralization process.To make luffing at the uniform velocity or slow down, luffing operation
More comfortable safety.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited thereto.At this
It, can be with various simple variants of the technical solution of the present invention are made, for example, the present invention is not only in the range of the technology design of invention
It may include the valve rod and pressure feedback oil duct of single form, other pressure feedback forms similar with this structure also belong to this hair
Bright protection scope.In order to avoid unnecessary repetition, the invention will not be further described in various possible combinations.But this
It should also be regarded as the disclosure of the present invention for a little simple variants and combination, all belongs to the scope of protection of the present invention.
Claims (12)
1. a kind of valve body of balanced valve, including valve body (100), the valve body (100) includes for valve rod assembly and each other to be arranged
The control port (X) and hollow cavity (110) of connection, which is characterized in that the hollow cavity (110) is included in valve rod assembly and is assembled to
The hollow cavity (110) is used to form the second oil pocket forming portion of the second oil pocket (400) when interior, is equipped in the valve body (100)
Load pressure feedback oil duct (LS), the load pressure feedback oil duct (LS) Single port be connected to the second oil pocket forming portion,
Load pressure feedback oil duct (the LS) another port be used for and be arranged the inside of valve rod assembly in hollow cavity (110) and hold
Variable load pressure feedback chamber (500) connection of product,
The valve body (100) is equipped with the reverse port (B) being connected to the second oil pocket forming portion.
2. the valve body of balanced valve according to claim 1, which is characterized in that be formed in the valve body (100) with it is described
The positive port (A) for being connected to the first oil pocket (300) in the valve rod assembly of hollow cavity (110) connection.
3. the valve body of balanced valve according to claim 1, which is characterized in that be formed with rodless cavity in the valve body (100)
Oil suction chamber (120), the rodless cavity oil suction chamber (120) are connected to the positive port (A) and the reverse port (B) respectively,
It is equipped in the rodless cavity oil suction chamber (120) for preventing oil liquid from flowing to the positive port (A) from the reverse port (B)
Check valve (600).
4. the valve body of balanced valve according to claim 2, which is characterized in that shape on the inner peripheral surface of the hollow cavity (110)
At being respectively formed with the first annular groove (111) and the second annular groove (112)；
First annular groove (111) with first oil pocket (300) for being connected to；
Second annular groove (112) with the load pressure feedback chamber (500) for being connected to.
5. a kind of valve rod assembly, which is characterized in that the valve rod assembly is for being assembled to as described in any one of claim 1-4
Balanced valve valve body control port (X) and hollow cavity (110) in,
The valve rod assembly includes valve rod (201), valve pocket (202) and the wedge angle valve seat being set on the valve rod (201)
(210), the valve rod (201) can be axially movably arranged in the valve pocket (202), the valve rod (201) and valve pocket
(202) the load pressure feedback chamber (500) of variable volume is formed between, is formed on the valve pocket (202) and is pressed with the load
The oilhole (2021) of force feedback chamber (500) connection；
The load pressure feedback chamber (500) is put down by the oilhole (2021) with as of any of claims 1-4
Load pressure feedback oil duct (the L of the valve body of weighing apparatus valveS) another port connection.
6. valve rod assembly according to claim 5, which is characterized in that the valve rod (201) includes the first shaft part (2011)
With the second shaft part, the diameter of first shaft part (2011) is greater than the diameter of second shaft part, includes in second shaft part
Preceding shaft part (2012) and rear shaft part (2013), the preceding shaft part (2012) and rear shaft part (2013) are separately positioned on the first axle
The arranged on left and right sides of section (2011), both the preceding shaft part (2012) and the rear shaft part (2013) are isometrical.
7. valve rod assembly according to claim 6, which is characterized in that first oil pocket (300), the second oil pocket (400)
With the setting position of load pressure feedback chamber (500) respectively with first shaft part (2011) of the valve rod (201), preceding shaft part
(2012) corresponding with the setting position of rear shaft part (2013).
8. valve rod assembly according to claim 6, which is characterized in that along the preceding shaft part (2012) and first shaft part
(2011) junction, on the outer peripheral surface of first shaft part (2011) circumferentially on be arranged at intervals with multiple throttling channels
(2014), the throttling channel (2014) is along the axially extending of first shaft part (2011), and depth is from the preceding shaft part (2012)
It is gradually become smaller to the first shaft part (2011) direction.
9. a kind of balanced valve, which is characterized in that including valve body according to any one of claims 1-4 (100), be arranged described
The piston component of valve body (100) side, such as described in any item valve rod assemblies of claim 5-8 and main spring chamber component；
The valve pocket (202) is arranged between the wedge angle valve seat (210) and the main spring chamber component；
The piston component includes end cap (810), and the cavity for accommodating piston mechanism (820) is equipped in the end cap (810)
(830), the piston mechanism (820) is slidably fixed in the cavity (830), and the top of the valve rod (201) passes through institute
Control port (X) is stated to protrude into the cavity (830)；
The other side of the valve body (100) and the main spring chamber component are tightly connected, and institute is protruded into the end of the valve rod (201)
State the inside cavity of main spring chamber component and with the main spring chamber component slidable connection.
10. balanced valve according to claim 9, which is characterized in that the wedge angle valve seat (210) is set in the valve rod
(201) it is correspondingly arranged on the throttling channel (2014), the valve rod (201) is along axial left and right sliding, the valve rod
(201) second oil pocket (400) and the first oil are realized by the throttling channel (2014) between the wedge angle valve seat (210)
The flow of barrier, connection and oil liquid between chamber (300) adjusts.
11. balanced valve according to claim 9, which is characterized in that the main spring chamber component includes swivel nut (710), institute
It states and is formed with main spring chamber (750) inside swivel nut (710), main spring seat (720) are equipped in the main spring chamber (750) and lock
Component (730), main spring (740) is set on the main spring seat (720) and supports with the locking assembly (730), described
It is supported with the main spring seat (720) end of valve rod (201).
12. a kind of flexible control loop of hydraulic cylinder, the hydraulic cylinder includes rod chamber and rodless cavity, the rod chamber and rodless cavity
Reversal valve is connected to by the first working oil path and the second working oil path respectively, the reversal valve is connected to oil inlet circuit and oil return
Circuit, second working oil path are equipped with balanced valve, which is characterized in that the balanced valve is such as any one of claim 9-11
The balanced valve, the positive port (A) of the balanced valve are connected to the reversal valve, reverse port (B) connection
In the rodless cavity of the hydraulic cylinder, the control port (X) passes through a piston component and pilot control oil circuit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910517221.9A CN110360174B (en) | 2019-06-14 | 2019-06-14 | Valve body, valve rod assembly, balance valve and hydraulic cylinder telescopic control loop of balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910517221.9A CN110360174B (en) | 2019-06-14 | 2019-06-14 | Valve body, valve rod assembly, balance valve and hydraulic cylinder telescopic control loop of balance valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110360174A true CN110360174A (en) | 2019-10-22 |
| CN110360174B CN110360174B (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910517221.9A Active CN110360174B (en) | 2019-06-14 | 2019-06-14 | Valve body, valve rod assembly, balance valve and hydraulic cylinder telescopic control loop of balance valve |
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| CN (1) | CN110360174B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173799A (en) * | 2019-12-30 | 2020-05-19 | 常德中联重科液压有限公司 | Balance valve, hydraulic cylinder control system, crane and lowering servo control method of crane |
| CN111891948A (en) * | 2020-05-27 | 2020-11-06 | 宁波江北宇洲液压设备厂 | Amplitude-variable balance valve with manual override mechanism |
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| CN203641148U (en) * | 2013-12-26 | 2014-06-11 | 中联重科股份有限公司 | Balance valve and hydraulic cylinder telescopic control loop |
| CN203856793U (en) * | 2014-05-27 | 2014-10-01 | 常德中联重科液压有限公司 | Balance valve and hydraulic cylinder telescoping control loop with same |
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| CN202176567U (en) * | 2011-08-17 | 2012-03-28 | 浙江圣邦机械有限公司 | Balance valve |
| CN102562699A (en) * | 2011-12-16 | 2012-07-11 | 中联重科股份有限公司 | Balanced valve, hydraulic cylinder expansion control loop and crane |
| CN202790565U (en) * | 2012-09-18 | 2013-03-13 | 中联重科股份有限公司 | Balance valve |
| CN103470815A (en) * | 2013-09-30 | 2013-12-25 | 常德中联重科液压有限公司 | Balance valve |
| CN203641148U (en) * | 2013-12-26 | 2014-06-11 | 中联重科股份有限公司 | Balance valve and hydraulic cylinder telescopic control loop |
| CN203856793U (en) * | 2014-05-27 | 2014-10-01 | 常德中联重科液压有限公司 | Balance valve and hydraulic cylinder telescoping control loop with same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173799A (en) * | 2019-12-30 | 2020-05-19 | 常德中联重科液压有限公司 | Balance valve, hydraulic cylinder control system, crane and lowering servo control method of crane |
| CN111891948A (en) * | 2020-05-27 | 2020-11-06 | 宁波江北宇洲液压设备厂 | Amplitude-variable balance valve with manual override mechanism |
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| Publication number | Publication date |
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| CN110360174B (en) | 2020-07-31 |
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