CN104564885B - A kind of highly integrated Double-directional back rotary valve for pilot control pattern - Google Patents
A kind of highly integrated Double-directional back rotary valve for pilot control pattern Download PDFInfo
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- CN104564885B CN104564885B CN201510008502.3A CN201510008502A CN104564885B CN 104564885 B CN104564885 B CN 104564885B CN 201510008502 A CN201510008502 A CN 201510008502A CN 104564885 B CN104564885 B CN 104564885B
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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
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Abstract
The invention discloses a kind of highly integrated Double-directional back rotary valve for pilot control pattern, including being integrated with trimmer valve, first shuttle valve, main overflow valve, reversal valve, first repairing check valve, the rotary valve body of the second repairing check valve and 2/2-way electromagnetic valve, rotary valve body is provided with the hydraulic fluid port A and hydraulic fluid port B and oil inlet P of connection hydraulic motor M, oil return inlet T, drain tap L and guide hydraulic fluid port a, guide hydraulic fluid port b, rotary valve body is also integrated with brake control module, brake control module is by the second shuttle valve being engaged, pilot operated directional control valve, 3rd shuttle valve, two-position three way magnetic valve and the first adjustable one-way throttle valve composition；Rotary valve body is provided with Y mouths and P1 mouths；Rotary valve body is built-in with and coordinates 2/2-way electromagnetic valve to constitute sequence valve, the second adjustable one-way throttle valve and the adjustable counterbalance valve for possessing automatic free rotary function；The oil outlet end of 2/2-way electromagnetic valve is connected with check valve, and the oil outlet end of the check valve is connected with oil inlet P.
Description
Technical field
The present invention relates to a kind of revolution in engineering machinery field, more particularly to excavator or crane hydraulic system is slow
Valve is rushed, specifically a kind of highly integrated Double-directional back rotary valve for pilot control pattern.
Background technology
Traditional vehicle crane gyration mechanism typically has following characteristics according to actual operation requirements, quickly can start,
Quickly can stop again, start/stop impact is little, steady；Cable wire can be made to keep lead weight and the accurately revolution etc. of arm support precise synchronization, made
Lifting function is safety quick, easily lifting cargo.Double-directional back rotary valve generally all has free rotary function, to ensure that machinery is returned
When turning revolution can steadily stopped, traditional Double-directional back rotary valve can make the skidding distance of revolution long and brake is unanimously in and holds
State is opened, thus safety is relatively poor.Simultaneously traditional Double-directional back rotary valve and the discrete setting of brake control module, also cause
Complete machine structure is extremely complex, and connecting line is more, easy oil leak, is also inconvenient to install and use, and this structure also accounts for each valve
Space is big, and volume is big, so fault rate is high, potential safety hazard is more, and service life is not also long.
The content of the invention
The technical problem to be solved is, for above-mentioned state of the art, and to provide that integrated level is high, structure is tight
Gather, small volume and a kind of highly integrated Double-directional back rotary valve for pilot control pattern of automatic free rotary function can be realized.
The present invention solve the technical scheme that adopted of above-mentioned technical problem for：It is a kind of highly integrated for pilot control pattern
Double-directional back rotary valve, including being integrated with trimmer valve, the first shuttle valve, main overflow valve, reversal valve, the first repairing check valve, the second repairing
Check valve and the rotary valve body for freely turning round 2/2-way electromagnetic valve, are formed with the rotary valve body for connecting in each respective valve
Portion's runner, and rotary valve body is provided with the hydraulic fluid port A and hydraulic fluid port B and oil inlet P, oil return inlet T, drain tap L of connection hydraulic motor M
With guide hydraulic fluid port a, guide hydraulic fluid port b, rotary valve body is also integrated with can make brake reach the brake control for changing down pass effect soon
Module, brake control module is by the second shuttle valve, pilot operated directional control valve, the 3rd shuttle valve, two-position three way magnetic valve being engaged and
One adjustable one-way throttle valve composition；Rotary valve body be provided with for connect brake and first can one-way throttle valve front end Y mouths with
And the P1 mouths of pilot control are provided for pilot operated directional control valve and two-position three way magnetic valve；Rotary valve body is built-in with cooperation 2/2-way electricity
Magnet valve constitutes sequence valve, the second adjustable one-way throttle valve and the adjustable counterbalance valve for possessing automatic free rotary function；2/2-way
The oil outlet end of electromagnetic valve is connected with the check valve that Opening pressure mental retardation realizes free rotary under low-load operating mode, and the check valve goes out
Oily end is connected with oil inlet P.
To optimize above-mentioned technical proposal, the measure taken also includes：
Two oil inlet end one end of the second above-mentioned shuttle valve are communicated with guide hydraulic fluid port a, and the other end is connected with guide hydraulic fluid port b,
The oil outlet end of second shuttle valve promotes oily end one end of two comparisons of liquid controlled reversing valve events, the 3rd shuttle valve to connect pilot operated directional control valve,
The other end connects two-position three way magnetic valve, and the middle oil end of the 3rd shuttle valve is connected with the rear end of the first adjustable one-way throttle valve
It is logical.
The oil return opening of the oil return opening and two-position three way magnetic valve of above-mentioned pilot operated directional control valve is connected with drain tap L.
Under normal conditions, the 3rd shuttle valve connects one end Jing pilot operated directional control valves of pilot operated directional control valve and lets out above-mentioned pilot operated directional control valve
Hydraulic fluid port L is connected, and under normal conditions, the 3rd shuttle valve connects one end Jing two-position three ways of two-position three way magnetic valve to two-position three way magnetic valve
Electromagnetic valve is connected with drain tap L.
The second above-mentioned adjustable one-way throttle valve oil inlet end is connected with oil inlet P, the second adjustable one-way throttle valve
Under the pressure of oil inlet P sequence valve can open automatically into free rotary armed state oil outlet end.
Oil-in of the oil-in connection of above-mentioned sequence valve in 2/2-way electromagnetic valve, the oil inlet end of adjustable counterbalance valve connect
The oil-out of sequence valve is connected on, the oil outlet end of this is adjustable counterbalance valve is connected with oil inlet P.
Above-mentioned trimmer valve is arranged on the inner flow passage between hydraulic fluid port A and hydraulic fluid port B, and the bypass of the first shuttle valve is connected on trimmer valve
On, the oil outlet end of first shuttle valve is connected with the oil-in of 2/2-way electromagnetic valve and is formed with secondary nodal point, secondary nodal point
The first damping is had additional between the oil outlet end of the first shuttle valve.
Above-mentioned main overflow valve oil inlet end Jing second damping be connected with secondary nodal point, the oil return opening of the main overflow valve and
Drain tap L is connected.
Above-mentioned reversal valve is three six-way transfer valves, and hydraulic fluid port A and hydraulic fluid port B and oil inlet P and oil return inlet T are connected to
The valve port of three six-way transfer valves, and the valve element of reversal valve be in interposition when, between hydraulic fluid port A and oil inlet P, hydraulic fluid port B with enter
Off-state is between hydraulic fluid port P, oil inlet P Jing reversal valve is connected with oil return inlet T.
Two ends one end of above-mentioned reversal valve is connected with guide hydraulic fluid port a, the other end and guide's hydraulic fluid port b phases of the reversal valve
Connection, and the valve element of the reversal valve, when being in interposition, oil inlet P energy Jing reversal valves and the first repairing check valve are hydraulic fluid port A
Repairing or Jing reversal valves and the second repairing check valve are hydraulic fluid port B repairings.
Compared with prior art, the present invention is integrated with the basis of traditional routine rotary buffering valve reaches can brake
The brake control module for closing effect is changed down soon, while automatic free rotary function is additionally arranged, and 2/2-way electromagnetic valve
Oil outlet end is connected with check valve, because unidirectional valve opening pressure it is low, therefore free rotary only need to the external loading of very little can be real
It is existing.Increase has automatic free rotary function, enables the invention to when when manipulation reversal valve i.e. automatically into free rotary state.Stop
When non-return turns operation, can automatic slowly close free rotary function, therefore the impact of the whole stopped process of system can be made little to several
Do not have.Present configuration is compact, integrated level is high, revolution registration, and impulsive force is little, stops steadily, and easy to operate, can be full
The use requirement of sufficient engineering machinery hydraulic revolution.
Description of the drawings
Fig. 1 is the hydraulic principle schematic of the present invention.
Specific embodiment
Embodiments of the invention are described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the hydraulic principle schematic of the present invention.
Reference therein is：Guide hydraulic fluid port a, guide hydraulic fluid port b, hydraulic fluid port A, hydraulic fluid port B, oil inlet P, oil return inlet T, draining
Mouth L, Y mouth, P1 mouths, standby hydraulic fluid port K, hydraulic motor M, trimmer valve 1, the first shuttle valve 2, first damp 21, main overflow valve 3, second
Damping 31, reversal valve 4, the first repairing check valve 51, the second repairing check valve 52,2/2-way electromagnetic valve 6, check valve 61, the
Two shuttle valves 71, pilot operated directional control valve 72, the 3rd shuttle valve 73, two-position three way magnetic valve 74, the first adjustable one-way throttle valve 75, sequence valve
81st, the second adjustable one-way throttle valve 82, adjustable counterbalance valve 83, primary nodal point 91, secondary nodal point 92.
If Fig. 1 is hydraulic schematic diagram of the invention, as illustrated, the present invention's is a kind of highly integrated for pilot control pattern
Double-directional back rotary valve, including be integrated with trimmer valve 1, the first shuttle valve 2, main overflow valve 3, reversal valve 4, the first repairing check valve 51,
Second repairing check valve 52 and the rotary valve body for freely turning round 2/2-way electromagnetic valve 6, are formed with the rotary valve body for connecting
The inner flow passage of each respective valve, and rotary valve body be provided with connection hydraulic motor M hydraulic fluid port A and hydraulic fluid port B and oil inlet P, return
Hydraulic fluid port T, drain tap L and guide hydraulic fluid port a, guide's hydraulic fluid port b and standby hydraulic fluid port K, rotary valve body is also integrated with reaches can brake
Change down soon close effect brake control module, brake control module by the second shuttle valve 71, pilot operated directional control valve 72 being engaged,
3rd shuttle valve 73, two-position three way magnetic valve 74 and the first adjustable one-way throttle valve 75 are constituted；Rotary valve body is provided with for connecting system
Dynamic device and first can 75 front end of one-way throttle valve Y mouths and be that pilot operated directional control valve 72 and two-position three way magnetic valve 74 provide guide
The P1 mouths of oil sources；Rotary valve body is built-in with and coordinates 2/2-way electromagnetic valve 6 to constitute the sequence valve for possessing automatic free rotary function
81st, the second adjustable one-way throttle valve 82 and adjustable counterbalance valve 83；It is low that the oil outlet end of 2/2-way electromagnetic valve 6 is connected with Opening pressure
The check valve 61 of free rotary under low-load operating mode can be realized, the oil outlet end of the check valve 61 is connected with oil inlet P.The present invention
Being integrated with the basis of traditional routine rotary buffering valve to make brake reach the brake control module for changing down pass effect soon,
The highly integrated of this kind of valve is realized, and is provided by sequence valve 81 and the second adjustable one-way throttle valve 82, be increased certainly
Dynamic free rotary function, enabling the invention to can be automatically into free rotary state when when manipulation reversal valve 4.Stop revolution behaviour
When making, automatic slowly closes free rotary function.Big because turning round the moment of inertia, turning round the driven process for accomplishing stopping can be long,
Therefore the present invention also increases an adjustable counterbalance valve 83, and auxiliary revolution stops, and the impact energy of so whole stopped process is little to several
Do not have.In traditional revolving valve 2/2-way electromagnetic valve 6 oil outlet end connection adjustable counterbalance valve, the present invention by tradition herein
Adjustable counterbalance valve made check valve 61 into, so 2/2-way electromagnetic valve 6 it is electric after, because 61 Opening pressure of check valve it is low,
So the external loading that free rotary only needs to very little is achieved that.
Further to optimize above-mentioned technical proposal, two oil inlet end one end and the guide hydraulic fluid port a of second shuttle valve 71 of the present invention
Communicate, the other end is connected with guide hydraulic fluid port b, the oil outlet end of second shuttle valve 71 promotes 72 action of pilot operated directional control valve, Rhizoma Sparganii
Oily end one end of two comparisons of valve 73 connects pilot operated directional control valve 72, other end connection two-position three way magnetic valve 74, the 3rd shuttle valve 73
Middle oil end be connected with the rear end of the first adjustable one-way throttle valve 75.
In embodiment, the oil return opening of the oil return opening and two-position three way magnetic valve 74 of pilot operated directional control valve 72 with drain tap L phases
Connection.
In embodiment, it will be seen from figure 1 that pilot operated directional control valve 72 is under normal conditions, the connection pilot operated directional control valve of the 3rd shuttle valve 73
72 one end Jing pilot operated directional control valve 72 is connected with drain tap L, and when the guide oil of the second shuttle valve 71 promotes pilot operated directional control valve 72
During action, now the pressure oil of P1 mouths just can enter the 3rd shuttle valve 73 with Jing pilot operated directional control valves 72.Two-position three way magnetic valve 74 exists
Under normality, one end Jing two-position three way magnetic valve 74 of the connection two-position three way magnetic valve 74 of the 3rd shuttle valve 73 is connected with drain tap L,
And after working as the telegram in reply of two-position three way magnetic valve 74, now the pressure oil of P1 mouths just can enter Rhizoma Sparganii with Jing two-position three way magnetic valves 74
Valve 73.
In embodiment, 82 oil inlet end of the second adjustable one-way throttle valve is connected with oil inlet P, the second adjustable one-way throttle
Under the pressure of oil inlet P sequence valve 81 can open automatically into free rotary armed state the oil outlet end of valve 82.
In embodiment, the oil-in of sequence valve 81 connects the oil-in in 2/2-way electromagnetic valve 6, adjustable counterbalance valve 83
Oil inlet end is connected to the oil-out of sequence valve 81, and the oil outlet end of this is adjustable counterbalance valve 83 is connected with oil inlet P.
In embodiment, trimmer valve 1 is arranged on the inner flow passage between hydraulic fluid port A and hydraulic fluid port B, and the bypass of the first shuttle valve 2 is connected on slow
Rush on valve 1, the oil outlet end of first shuttle valve 2 is connected with the oil-in of 2/2-way electromagnetic valve 6 and is formed with secondary nodal point 92,
The first damping 21 is had additional between the oil outlet end of secondary nodal point 92 and the first shuttle valve 2.
In embodiment, the dampings of oil inlet end Jing second 31 of main overflow valve 3 are connected with secondary nodal point 92, the main overflow valve 3
Oil return opening be connected with drain tap L.
In embodiment, reversal valve 4 is three six-way transfer valves, and hydraulic fluid port A and hydraulic fluid port B and oil inlet P and oil return inlet T connect
It is connected to the valve port of three six-way transfer valves 4, and the valve element of reversal valve 4 is when being in interposition, between hydraulic fluid port A and oil inlet P, hydraulic fluid port
Off-state is between B and oil inlet P, oil inlet P Jing reversal valve 4 is connected with oil return inlet T.
In embodiment, two ends one end of reversal valve 4 is connected with guide hydraulic fluid port a, the other end and guide oil of the reversal valve 4
Mouthful b is connected, and the valve element of the reversal valve 4 is when being in interposition, oil inlet P energy Jing reversal valves 4 and the first repairing check valve
51 are hydraulic fluid port A repairings or Jing reversal valves 4 and the second repairing check valve 52 is hydraulic fluid port B repairings.
As shown in figure 1, the built-in brake control module of the present invention, P1 mouths connect pilot control, in the ban oil diverting port a or guide
When hydraulic fluid port b enters control pressure, reversal valve 4 is promoted all the way, lead up to the second shuttle valve 71 in addition and promote pilot operated directional control valve 72, at this moment
The guide oil of P1 mouths enters braking by pilot operated directional control valve 72, then through the 3rd shuttle valve 73 and the first adjustable one-way throttle valve 75
Device, realizes that brake is opened soon.
In the ban during the control oil revocation of oil diverting port a or guide hydraulic fluid port b, pilot operated directional control valve 72 resets, and P1 mouths are blocked, braking
The oil of device is slowly back to L mouths to fuel tank through the damping port of the first adjustable one-way throttle valve 75, realizes that brake is closed slowly.
In addition 2/2-way electromagnetic valve 6 and two-position three way magnetic valve 74 is needed all to obtain electric during free rotary, now P1 mouths
Guide oil is by two-position three way magnetic valve 74, then enters brake through the 3rd shuttle valve 73 and the first adjustable one-way throttle valve 75,
Realize that brake is opened soon, electromagnetic valve is closed soon and realizes that brake is closed slowly in the same manner.
The unidirectional Opening pressure of the present invention is low, is capable of achieving free rotary low-load operating mode, and free rotary refers to reversal valve 4
It is motionless in middle position, the operator scheme that 2/2-way electromagnetic valve 6 and two-position three way magnetic valve 74 are switched on, it needs to meet four
Condition：
Condition 1, brake needs to open.The condition two-bit triplet electromagnetic valve 74 it is electric after can meet.
There is external loading in condition 2, hydraulic fluid port A or hydraulic fluid port B.The condition is necessarily satisfying for because be ability when there is external loading
Free rotary is done, simply external loading is not of uniform size, the more big easier realization of external loading it requires little load
Free rotary can be realized.
Condition 3, trimmer valve 1 are opened.The premise that condition 3 meets is secondary nodal point 92 to primary nodal point 91 is unimpeded and pressure
It is little.
4th, require repairing check valve.Condition 4 meets, because existing first repairing check valve 51 and the second repairing check valve 52
Two repairing check valves.
In sum, need the Opening pressure of check valve 61 little, original product is adjustable direct-acting overflow valve, open
Pressure is big, and the free rotary operating mode of low-load can be met after changing check valve 61 into.
Automatically free rotary function of the invention is rapidly pilot handle to reset in order to meet operator, causes reversal valve 4
In multiple immediately during this non-standard operation, revolution can also steadily stopped, rather than violent severe impact.It is different from tradition certainly
By trackslipping, although also steadily can stop during free rotary, but skidding distance is long and brake is unanimously in opening, uneasy
Entirely.
The mechanism of free rotary automatically of the invention is as follows：
Guide oil enters guide's hydraulic fluid port a or guide hydraulic fluid port b, promotes reversal valve 4, oil inlet P to build pressure, start revolution action,
Oil inlet P pressure opens sequence valve 81 by the second adjustable one-way throttle valve 82, and freedom of entry is trackslipped armed state, but due to
The presence of adjustable counterbalance valve 83, P mouth pressure highest principles when adding normal revolution, causes secondary nodal point 92 and primary nodal point 91
Between it is obstructed, when the pilot pressure of oil diverting port a or guide hydraulic fluid port b is withdrawn in the ban, reversal valve 4 resets, oil inlet P oil directly return
To oil return inlet T, and the inertia of turntable continues to drive hydraulic motor M rotations, but now hydraulic fluid port A and hydraulic fluid port B are blocked up by reversal valve 4
Firmly, moment generation high pressure, this high pressure is transferred to secondary nodal point 92 by the first shuttle valve 2, if no automatic free rotary work(
Can, the just meeting off-load only when this high pressure reaches the pressure of the setting of main overflow valve 3, but pressure unloading is very high, can produce violent
Strong impact.And the new departure for possessing automatic free rotary function has been enter into the armed state of free rotary, this high pressure is through
Two nodes 92, sequence valve 81 and adjustable counterbalance valve 83 return to oil return inlet T, the compression shock of hydraulic fluid port A or hydraulic fluid port B are eliminated, in addition
The distance of sliding can be adjusted by the pressure of adjustable counterbalance valve 83, because the inertia of turntable is big and inconsistent, need one conjunction of setting
The Opening pressure of reason, this Opening pressure are more much higher than the Opening pressure of check valve 61, and skidding distance not so can be caused long,
Second adjustable one-way throttle valve 82 can make 81 slowly closing of sequence valve so as to cut off free rotary function.
Claims (6)
1. a kind of highly integrated Double-directional back rotary valve for pilot control pattern, including be integrated with trimmer valve (1), the first shuttle valve (2),
Main overflow valve (3), reversal valve (4), the first repairing check valve (51), the second repairing check valve (52) and freely turn round 2/2-way
The rotary valve body of electromagnetic valve (6), is formed with the rotary valve body for connecting the inner flow passage of each respective valve, and rotary valve body is opened
There are hydraulic fluid port A and hydraulic fluid port B and oil inlet P, oil return inlet T, drain tap L and guide hydraulic fluid port a, the guide oil of connection hydraulic motor (M)
Mouth b, the oil outlet end of described 2/2-way electromagnetic valve (6) are connected with Opening pressure mental retardation and realize free rotary under low-load operating mode
Check valve (61), the oil outlet end of the check valve (61) is connected with oil inlet P；Described trimmer valve (1) installed in hydraulic fluid port A and
On inner flow passage between hydraulic fluid port B, described first shuttle valve (2) bypass is connected on trimmer valve (1), first shuttle valve (2) it is fuel-displaced
End is connected with the oil-in of 2/2-way electromagnetic valve (6) and is formed with secondary nodal point (92), described secondary nodal point (92) and
The first damping (21) is had additional between the oil outlet end of the first shuttle valve (2)；It is characterized in that：Described rotary valve body is also integrated with can make system
Dynamic device reaches and changes down the brake control module for closing effect soon, and described brake control module is by the second shuttle valve being engaged
(71), pilot operated directional control valve (72), the 3rd shuttle valve (73), two-position three way magnetic valve (74) and the first adjustable one-way throttle valve (75) group
Into；Described rotary valve body is provided with for connecting the Y mouths of brake and the first adjustable one-way throttle valve (75) front end and being liquid
Control reversal valve (72) and two-position three way magnetic valve (74) provide the P1 mouths of pilot control；Described rotary valve body is built-in with cooperation two
Two three-way electromagnetic valves of position (6) constitute possess the sequence valve (81) of automatic free rotary function, the second adjustable one-way throttle valve (82) and
Adjustable counterbalance valve (83)；The second described adjustable one-way throttle valve (82) oil inlet end is connected with oil inlet P, the second adjustable list
Under the pressure of oil inlet P sequence valve (81) can open to the oil outlet end of choke valve (82) to await orders shape automatically into free rotary
State；Oil-in of the oil-in connection of described sequence valve (81) in 2/2-way electromagnetic valve (6), described adjustable counterbalance valve
(83) oil inlet end is connected to the oil-out of sequence valve (81), and the oil outlet end of this is adjustable counterbalance valve (83) is connected with oil inlet P；
The oil inlet end Jing second of described main overflow valve (3) is damped (31) and is connected with secondary nodal point (92), the main overflow valve (3) return
Hydraulic fluid port is connected with drain tap L；The mechanism of the automatic free rotary of Double-directional back rotary valve is：Guide oil enters guide's hydraulic fluid port a or guide oil
Mouth b, promotes reversal valve (4), oil inlet P to build pressure, starts revolution action, and oil inlet P pressure passes through the second adjustable one-way throttle valve
(82) open sequence valve (81), freedom of entry is trackslipped armed state, but due to the presence of adjustable counterbalance valve (83), add normal
Oil inlet P pressure highest principle during revolution, causes obstructed between secondary nodal point (92) and primary nodal point (91), oil diverting port in the ban
When the pilot pressure of a or guide hydraulic fluid port b is withdrawn, reversal valve (4) resets, and the oil of oil inlet P is returned directly to oil return inlet T, and turntable
Inertia continue to drive hydraulic motor (M) rotation, but now hydraulic fluid port A and hydraulic fluid port B are blocked by reversal valve (4), and moment produces high
Pressure, this high pressure is transferred to secondary nodal point (92) by the first shuttle valve (2), if no automatic free rotary function, only when
When this high pressure reaches the pressure that main overflow valve (3) sets just can off-load, but pressure unloading is very high, can produce fierce impact；
And possess the armed state for then having been enter into free rotary of automatic free rotary function, this high pressure through secondary nodal point (92),
Sequence valve (81) and adjustable counterbalance valve (83) return to oil return inlet T, the compression shock of hydraulic fluid port A or hydraulic fluid port B is eliminated, in addition sliding
Distance is adjusted by the pressure of adjustable counterbalance valve (83), because the inertia of turntable is big and inconsistent, needs setting one reasonably to open
Pressure is opened, this Opening pressure is more much higher than the Opening pressure of check valve (61), skidding distance not so can be caused long, second
Adjustable one-way throttle valve (82) can make sequence valve (81) slowly closing so as to cut off free rotary function.
2. a kind of highly integrated Double-directional back rotary valve for pilot control pattern according to claim 1, is characterized in that：It is described
Two oil inlet end one end of the second shuttle valve (71) communicate with guide hydraulic fluid port a, the other end is connected with guide hydraulic fluid port b, second shuttle
The oil outlet end of valve (71) promotes the two of pilot operated directional control valve (72) action, the 3rd described shuttle valve (73) to compare oily end one end connection liquids
Control reversal valve (72), other end connection two-position three way magnetic valve (74), the middle oil end of the 3rd shuttle valve (73) is adjustable with first
The rear end of one-way throttle valve (75) is connected.
3. a kind of highly integrated Double-directional back rotary valve for pilot control pattern according to claim 2, is characterized in that：It is described
The oil return opening of pilot operated directional control valve (72) and the oil return opening of two-position three way magnetic valve (74) be connected with drain tap L.
4. a kind of highly integrated Double-directional back rotary valve for pilot control pattern according to claim 3, is characterized in that：It is described
Pilot operated directional control valve (72) under normal conditions, the 3rd shuttle valve (73) connection pilot operated directional control valve (72) one end Jing pilot operated directional control valves (72)
It is connected with drain tap L, under normal conditions, the 3rd shuttle valve (73) connects two-position three-way electromagnetic to described two-position three way magnetic valve (74)
One end Jing two-position three way magnetic valves (74) of valve (74) is connected with drain tap L.
5. a kind of highly integrated Double-directional back rotary valve for pilot control pattern according to claim 4, is characterized in that：It is described
Reversal valve (4) be three six-way transfer valves, described hydraulic fluid port A and hydraulic fluid port B and oil inlet P and oil return inlet T are connected to three
The valve port of position six-way transfer valve (4), and the valve element of described reversal valve (4) is when being in interposition, described hydraulic fluid port A and oil-feed
Between mouth P, off-state between hydraulic fluid port B and oil inlet P, is, described oil inlet P Jing reversal valve (4) is connected with oil return inlet T.
6. a kind of highly integrated Double-directional back rotary valve for pilot control pattern according to claim 5, is characterized in that：It is described
Two ends one end of reversal valve (4) be connected with guide hydraulic fluid port a, the other end of the reversal valve (4) is connected with guide hydraulic fluid port b,
And when the valve element of the reversal valve (4) is in interposition, described oil inlet P energy Jing reversal valves (4) and the first repairing check valve
(51) it is hydraulic fluid port A repairings or Jing reversal valves (4) and the second repairing check valve (52) is hydraulic fluid port B repairings.
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| CN109973452B (en) * | 2017-12-28 | 2024-01-23 | 中国铁建高新装备股份有限公司 | Reverse braking control valve for hydraulic traveling system |
| CN108317117B (en) * | 2018-04-02 | 2024-01-05 | 中国船舶重工集团公司第七一九研究所 | Double-margin servo control valve group with low throttle noise |
| CN108757613B (en) * | 2018-06-20 | 2019-12-20 | 徐州重型机械有限公司 | Rotary control valve group, rotary control system and crane |
| CN111439691B (en) * | 2020-04-17 | 2022-03-01 | 浙江三一装备有限公司 | Slewing device hydraulic control system and engineering machinery |
| CN116733794B (en) * | 2023-06-09 | 2024-06-14 | 江苏汇智高端工程机械创新中心有限公司 | Load self-adaptive rotary buffer valve and hydraulic system |
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| CN1175190C (en) * | 2001-12-10 | 2004-11-10 | 卢永松 | Rotary buffering valve |
| JP3923956B2 (en) * | 2004-04-27 | 2007-06-06 | 株式会社▲高▼梨油気圧 | Rotary switching valve for hydraulic equipment |
| CN101598152A (en) * | 2009-06-18 | 2009-12-09 | 卢宇 | Large-flow compact type bi-directional rotary control valve |
| CN201525714U (en) * | 2009-11-05 | 2010-07-14 | 卢宇 | Electric-liquid combination operation rotation control valve for upper machine of hydraulic control crane |
| CN201944026U (en) * | 2010-12-30 | 2011-08-24 | 常德中联重科液压有限公司 | Rotary valve and rotary control loop applying same |
| CN204403021U (en) * | 2015-01-08 | 2015-06-17 | 宁波宇洲液压科技有限公司 | A kind of high integrated Double-directional back rotary valve for pilot control pattern |
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2015
- 2015-01-08 CN CN201510008502.3A patent/CN104564885B/en active Active
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| CN104564885A (en) | 2015-04-29 |
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