CN105439018B - Revolution hydraulic control system and crane with sectional control function - Google Patents
Revolution hydraulic control system and crane with sectional control function Download PDFInfo
- Publication number
- CN105439018B CN105439018B CN201410693450.3A CN201410693450A CN105439018B CN 105439018 B CN105439018 B CN 105439018B CN 201410693450 A CN201410693450 A CN 201410693450A CN 105439018 B CN105439018 B CN 105439018B
- Authority
- CN
- China
- Prior art keywords
- fluid port
- hydraulic fluid
- reversal valve
- valve
- rotary motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to a kind of revolution hydraulic control system and crane with sectional control function, wherein, revolution hydraulic control system with sectional control function includes rotary motor, for the trainstop braked to rotary motor, for the brake control valve for controlling trainstop whether to brake, and revolving valve, revolving valve include the first reversal valve and the second reversal valve；In turning course, the oil circuit where the first reversal valve is used for the first hydraulic fluid port oil-feed or the second hydraulic fluid port oil-feed for controlling rotary motor, realizes the right-hand rotation or left-hand rotation of rotary motor；The first hydraulic fluid port and the second hydraulic fluid port of rotary motor are connected by the second reversal valve；In stopped process is turned round, the first reversal valve is closed, and the first hydraulic fluid port and the second hydraulic fluid port of rotary motor are connected by the second reversal valve；After revolution stops, the second reversal valve is closed, and the first hydraulic fluid port of rotary motor and the second hydraulic fluid port disconnect.The present invention can ensure that revolution is steady, prevent automatic capturing after revolution stopping, improving security reliability.
Description
Technical field
The present invention relates to engineering machinery field, more particularly to a kind of revolution hydraulic control system with sectional control function and rise
Heavy-duty machine.
Background technology
Rough terrain wheeled crane is to inherit the advantages that autocrane maneuverability travels with crawler crane lift heavy
A kind of Function Extension wheel-mounted crane, there are three kinds of working conditions, respectively supporting leg working condition, Tire support operation work
Condition and lift heavy driving cycle, wherein supporting leg working condition and Tire support working condition can carry out operation of getting on the bus.
With the exploitation of rough terrain wheeled crane, the requirement more and more higher of security reliability is turned round to it.The medium and small ton of tradition
The rotary system of position rough terrain wheeled crane typically uses hydraulic control mode, in stopped process is turned round, pass through rotary motor A, B mouth
Pass to that realization revolution is steady to be stopped, after stopping system by the complete locking of trainstop, its feature for control is stable, cost compared with
It is low.But when traditional revolution hydraulic control system can not avoid other systems work, trainstop is opened, now, if vehicle goes out
Existing injustice, by automatic rotary centering, (because vehicle supports injustice, outside counterweight oblique pull turns round rotary motor to counterweight, drives whole
It is individual to get on the bus in center position), the security reliability of vehicle is influenceed, particularly in Tire support lift heavy working condition, is turned round
Automatic capturing will likely overturn, and have a strong impact on vehicle security.
The content of the invention
The purpose of the present invention is to propose to a kind of revolution hydraulic control system and crane with sectional control function, it can either
Guarantee revolution is steady to be stopped, and and can enough prevents the generation of automatic capturing phenomenon after revolution stopping, effectively increasing the safety of vehicle
Reliability.
To achieve the above object, the invention provides a kind of revolution hydraulic control system with sectional control function, it includes
Rotary motor, for the trainstop braked to the rotary motor, for controlling whether the trainstop is made
Dynamic brake control valve, and revolving valve, the revolving valve include the first reversal valve and the second reversal valve；
In turning course, the oil circuit where first reversal valve is used to control the first hydraulic fluid port of the rotary motor to enter
Oil or the second hydraulic fluid port oil-feed, realize the right-hand rotation or left-hand rotation of the rotary motor；First hydraulic fluid port of the rotary motor and the second oil
Mouth passes through second reversal valve and connected；
In stopped process is turned round, first reversal valve is closed, the first hydraulic fluid port and the second hydraulic fluid port of the rotary motor
Connected by second reversal valve；
After revolution stops, second reversal valve is closed, and the first hydraulic fluid port of the rotary motor and the second hydraulic fluid port disconnect.
One preferably or in alternative embodiment, first reversal valve comprises at least middle position, the first working position and the second work
Make position, in the middle position, the first hydraulic fluid port and the second hydraulic fluid port of the rotary motor enter first reversal valve without hydraulic oil
Enter, first reversal valve is in first working position, the first hydraulic fluid port oil-feed of the rotary motor, the rotary motor
Second hydraulic fluid port oil return, first reversal valve is in second working position, and the second hydraulic fluid port oil-feed of the rotary motor is described
First hydraulic fluid port oil return of rotary motor.
One preferably or in alternative embodiment, first reversal valve is pilot operated directional control valve, the of first reversal valve
One hydraulic control end connects with the first pilot control opening of the revolving valve, the second hydraulic control end and the revolution of first reversal valve
The second pilot control opening connection of valve.
One preferably or in alternative embodiment, second reversal valve, which comprises at least, ends position and working position, and described second
Reversal valve is in the cut-off position, and the first hydraulic fluid port of the rotary motor and the second hydraulic fluid port are disconnected, and second reversal valve is in
The working position, the first hydraulic fluid port and the second hydraulic fluid port of the rotary motor are connected by second reversal valve.
One preferably or in alternative embodiment, the first hydraulic fluid port and the second hydraulic fluid port of the rotary motor change by described second
Damping is provided with the oil circuit connected to valve.
One preferably or in alternative embodiment, second reversal valve is pilot operated directional control valve, the liquid of second reversal valve
Control end is communicated with the oil-out of shuttle valve, and two oil inlets of the shuttle valve correspond to the first pilot control with the revolving valve respectively
Mouth connects with the second pilot control opening.
One preferably or in alternative embodiment, the hydraulic control Opening pressure of second reversal valve is less than first reversal valve
Hydraulic control Opening pressure.
To achieve the above object, the invention provides a kind of crane, it includes having in any of the above-described embodiment and divided
The revolution hydraulic control system of section control function.
Based on above-mentioned technical proposal, the present invention at least has the advantages that：
The present invention is realized and turned round by the Discrete control being opened and closed to the first reversal valve in revolving valve and the second reversal valve
End the second reversal valve after the insertion of the first hydraulic fluid port and the second hydraulic fluid port of rotary motor in journey, and revolution stopping, turning round horse
The disconnection of the first hydraulic fluid port and the second hydraulic fluid port that reach, therefore, open trainstop even if brake control valve is powered, vehicle is deposited
In the case of uneven oblique pull counterweight, rotary system also will not realize automatic capturing under uncontrolled, ensure that revolution steadily stops
Only, the security reliability of system is effectively increased.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the principle schematic of the revolution hydraulic control system provided by the invention with sectional control function.
Label in accompanying drawing：
1- rotary motors；2- trainstops；3- brake control valves；4- revolving valves；5- shuttle valves；The reversal valves of 6- first；
The reversal valves of 7- second.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in embodiment is clearly and completely retouched
State.Obviously, described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.Based on this hair
Bright embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, it is for only for ease of the description present invention and simplifies description, rather than instruction or the dress for implying meaning
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the present invention is protected
The limitation of scope.
As shown in figure 1, be the illustrative examples of the revolution hydraulic control system provided by the invention with sectional control function,
In the illustrative examples, the revolution hydraulic control system with sectional control function includes rotary motor 1, for rotary motor
1 trainstop 2 braked, for the brake control for controlling trainstop 2 whether to be braked to rotary motor 1
Valve 3, and for controlling rotary motor 1 whether to turn round the revolving valve 4 of work, revolving valve 4 comprise at least the first reversal valve 6 and the
Two reversal valves 7.
Turned round in rotary motor 1 in the course of work, the oil circuit where the first reversal valve 6 is used to controlling the of rotary motor 1
One hydraulic fluid port A oil-feeds or the second hydraulic fluid port B oil-feeds, realize the right-hand rotation or left-hand rotation of rotary motor 1；First hydraulic fluid port A of rotary motor 1 and
Two hydraulic fluid port B are connected by the second reversal valve 7；Impulsive force in the revolution course of work can pass through the first hydraulic fluid port A of rotary motor 1
And the second connection power consumption between hydraulic fluid port B eliminates, steady revolution is realized.
Rotary motor 1 turn round work stopped process in, the first reversal valve 6 is closed, rotary system under effect of inertia after
Continuous revolution, the first hydraulic fluid port A and the second hydraulic fluid port B of rotary motor 1 are connected by the second reversal valve 7, and inertia force passes through rotary motor 1
The first hydraulic fluid port A and the second hydraulic fluid port B between connection power consumption eliminate, realize steady stop.
After rotary motor 1 stops revolution work, the second reversal valve 7 is closed, the first hydraulic fluid port A of rotary motor 1 and second
Hydraulic fluid port B disconnects.Trainstop 2 is opened even if brake control valve 3 is powered, in the case of uneven oblique pull counterweight being present in vehicle,
Rotary system also will not realize automatic capturing under uncontrolled, improve the security reliability of vehicle.
In the illustrative examples of the revolution hydraulic control system provided by the invention with sectional control function, the first commutation
The oil inlet of valve 6 connects with the oil inlet P of revolving valve 4, and the oil return opening of the first reversal valve 6 connects with the oil return inlet T of revolving valve 4,
First actuator port of the first reversal valve 6 can connect with the first hydraulic fluid port A of rotary motor 1, the second work of the first reversal valve 6
Hydraulic fluid port can connect with the second hydraulic fluid port B of rotary motor 1.
In the illustrative examples of the revolution hydraulic control system provided by the invention with sectional control function, the first commutation
Valve 6 can at least include middle position, the first working position and the second working position, and the first reversal valve 6 is in middle position, and the of rotary motor 1
One hydraulic fluid port A and the second hydraulic fluid port B enters without hydraulic oil, and the first reversal valve 6 is in the first working position, the first oil of rotary motor 1
Mouth A oil-feeds, the second hydraulic fluid port B oil returns of rotary motor 1, the first reversal valve 6 is in the second working position, the second oil of rotary motor 1
Mouth B oil-feeds, the first hydraulic fluid port A oil returns of rotary motor 1.
In the illustrative examples of the revolution hydraulic control system provided by the invention with sectional control function, the first commutation
Valve 6 is pilot operated directional control valve, and the first hydraulic control end of the first reversal valve 6 can connect with the first pilot control opening a of revolving valve 4, the
Second hydraulic control end of one reversal valve 6 can connect with the second pilot control opening b of revolving valve 4.Pass through the first guide of revolving valve 4
Control mouth a or the second pilot control opening b pressure oil enter the first hydraulic control end or the second hydraulic control end of the first reversal valve 6, open
First reversal valve 6, the first reversal valve 6 is in the first working position or the second working position, realize right-hand rotation or the left side of rotary motor 1
Turn.
In the illustrative examples of the revolution hydraulic control system provided by the invention with sectional control function, the second commutation
Valve 7 can at least include cut-off position and working position, and the second reversal valve 7 is in cut-off position, the first hydraulic fluid port A of rotary motor 1 and the
Two hydraulic fluid port B disconnect, and the second reversal valve 7 is in working position, and the first hydraulic fluid port A and the second hydraulic fluid port B of rotary motor 1 pass through the second commutation
Valve 7 connects.
In above-mentioned illustrative examples, the first hydraulic fluid port A and the second hydraulic fluid port B of rotary motor 1 are connected by the second reversal valve 7
Oil circuit on can be provided with damping.Impulsive force in start-up course is turned round can by the first hydraulic fluid port A of rotary motor 1 and
The damping throttling power consumption connected between second hydraulic fluid port B eliminates, and realizes smooth starting.Impulsive force in turning course can pass through
The damping throttling power consumption connected between the first hydraulic fluid port A and the second hydraulic fluid port B of rotary motor 1 eliminates, and realizes steady revolution.Turning round
Inertia force in stopped process can be throttled by the damping connected between the first hydraulic fluid port A and the second hydraulic fluid port B of rotary motor 1 to be consumed
It can eliminate, realize steady stop.
In the illustrative examples of the revolution hydraulic control system provided by the invention with sectional control function, the second commutation
Valve 7 can be electric control reversing valve or pilot operated directional control valve, when the second reversal valve 7 is pilot operated directional control valve, the hydraulic control of the second reversal valve 7
End is communicated with the oil-out of shuttle valve 5, and two oil inlets of shuttle valve 5 correspond to and the first pilot control opening a of revolving valve 4 and the respectively
Two pilot control opening b are connected.Shuttle is entered by the first pilot control opening a or the second pilot control opening b of revolving valve 4 pressure oil
A wherein oil inlet for valve 5, the second reversal valve 7 is opened, the second reversal valve 7 is in working position, realizes the first of rotary motor 1
Hydraulic fluid port A and the second hydraulic fluid port B connection.
In above-mentioned illustrative examples, the hydraulic control Opening pressure of the second reversal valve 7 is less than the hydraulic control unlatching of the first reversal valve 6
Pressure.In start-up course is turned round, the first pilot control opening a or the second pilot control opening b of revolving valve 4 pressure gradually increase
Greatly, the second reversal valve 7 is opened by shuttle valve 5 first, realizes the first hydraulic fluid port A and the second hydraulic fluid port B of rotary motor 1 insertion, then
The first reversal valve 6 is opened, realizes the first hydraulic fluid port A or the second hydraulic fluid port B oil-feeds of rotary motor 1, driving rotary motor 1 is turned right or a left side
Turn.
A specific embodiment of the revolution hydraulic control system provided by the invention with sectional control function is set forth below, at this
In specific embodiment, the first reversal valve 6 and the second reversal valve 7 are pilot operated directional control valve, the hydraulic control Opening pressure of the second reversal valve 7
Less than the hydraulic control Opening pressure of the first reversal valve 6, the control oil sources of the first reversal valve 6 and the commutation of the second reversal valve 7 is taken at back
The the first pilot control opening a and the second pilot control opening b of rotary valve 4, by being opened relative to the first reversal valve 6 the second reversal valve 7
The control of sequential is closed, realizes that the first hydraulic fluid port A and the second hydraulic fluid port B of rotary motor 1 in turning course insertion, revolution make after stopping
The first hydraulic fluid port A and the second hydraulic fluid port B cut-off of rotary motor 1, it ensure that revolution is steady and stop, preventing that revolution is uncontrolled after stopping
Automatic capturing, is effectively improved the security reliability of system, and the detailed operation of the specific embodiment is as follows：
In start-up course is turned round, revolution hydraulic control handle, the first pilot control opening a of revolving valve 4 or the second guide are manipulated
Control mouth b pressure gradually increases, first by shuttle valve 5 open the second reversal valve 7, realize rotary motor 1 the first hydraulic fluid port A and
Second hydraulic fluid port B insertion, then the first reversal valve 6 is opened, the first hydraulic fluid port A or the second hydraulic fluid port B oil-feeds of rotary motor 1 are realized, is driven
Dynamic rotary motor 1 is turned right or turned left, and the impulsive force in start-up course can pass through the hydraulic fluid port A of rotary motor 1 first and the second hydraulic fluid port B
Between connect damping throttling power consumption eliminate, realize smooth starting；
In turning course, the second reversal valve 7 is constantly in commutation states (working position), realizes the first of rotary motor 1
Hydraulic fluid port A and the second hydraulic fluid port B insertion, the impulsive force in turning course can pass through the oil of the first hydraulic fluid port A of rotary motor 1 and second
The damping throttling power consumption connected between mouth B eliminates, and realizes steadily revolution；
In stopped process is turned round, revolution hydraulic control handle, the first pilot control opening a of revolving valve 4 or the second guide are manipulated
Control mouth b pressure is gradually reduced, and first closes the first reversal valve 6, and the second reversal valve 7 is not turned off, and makes rotary motor 1
First hydraulic fluid port A and the second hydraulic fluid port B continue to turn round still in connected state, rotary system under effect of inertia, and inertia force is by returning
The damping throttling power consumption for turning to connect between the first hydraulic fluid port A of motor 1 and the second hydraulic fluid port B eliminates, and realizes steady stop；
After revolution stops, the second reversal valve 7 ends, and disconnects the first hydraulic fluid port A and the second hydraulic fluid port B of rotary motor 1, this
When, open trainstop 2 even if brake control valve 3 is powered, in the case of uneven oblique pull counterweight being present in vehicle, rotary system
Also automatic capturing will not be realized under uncontrolled, avoids the occurrence of rollover phenomenon, improve the security reliability of vehicle.
By the description of above-mentioned each embodiment, it can derive that the present invention at least has advantages below：
1) control performance is high：Pilot control pressure realizes the opening and closing sequential control of the first reversal valve 6 and the second reversal valve 7
System, ensure that revolution stationarity, it is therefore prevented that rotary system automatic rotary centering.
2) security reliability of vehicle is improved：Second reversal valve 7 keeps cut-off state after revolution stops, even if braking
Device control valve 3, which is powered, opens trainstop 2, and in the case of vehicle has uneven oblique pull counterweight, rotary system also will not be automatic
Centering, improve the security reliability of vehicle.
Revolution hydraulic control system provided by the invention with sectional control function can be applied on crane.
In the illustrative examples of crane provided by the invention, crane includes having in any of the above-described embodiment
The revolution hydraulic control system of sectional control function.
Crane provided by the invention possesses the revolution hydraulic control system provided by the invention with sectional control function accordingly
The beneficial effect of system.
Revolution hydraulic control system provided by the invention with sectional control function includes the first reversal valve 6 and the second commutation
Valve 7, the first reversal valve 6 and the second reversal valve 7 are pilot operated directional control valve, and it controls oil sources to be taken at the pilot control opening of revolving valve 4, are led to
The control for being opened and closed sequential relative to the first reversal valve 6 to the second reversal valve 7 is crossed, realizes first of rotary motor 1 in turning course
Hydraulic fluid port A and the second hydraulic fluid port B connection, revolution end the second reversal valve 7 after stopping, the first hydraulic fluid port A of rotary motor 1 and second
Hydraulic fluid port B disconnections, it ensure that revolution is steady and stop, preventing uncontrolled automatic capturing after revolution stopping, being effectively improved system
Security reliability.
In the description of the invention, it is to be understood that limit parts using the word such as " first ", " second ", only
It is for only for ease of and above-mentioned parts is distinguished, does not such as have Stated otherwise, above-mentioned word does not have particular meaning, therefore not
It is understood that as limiting the scope of the invention.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (6)
1. a kind of revolution hydraulic control system with sectional control function, including rotary motor (1), for the rotary motor
(1) trainstop (2) braked, for the brake control valve for controlling the trainstop (2) whether to brake
, and revolving valve (4) (3), it is characterised in that：The revolving valve (4) includes the first reversal valve (6) and the second reversal valve (7), institute
It is pilot operated directional control valve to state the first reversal valve (6) and the second reversal valve (7), the hydraulic control Opening pressure of second reversal valve (7)
Less than the hydraulic control Opening pressure of first reversal valve (6)；
In turning course, the oil circuit where first reversal valve (6) is used for the first hydraulic fluid port for controlling the rotary motor (1)
Oil-feed or the second hydraulic fluid port oil-feed, realize the right-hand rotation or left-hand rotation of the rotary motor (1)；By to the second reversal valve (7) phase
Control for the first reversal valve (6) opening and closing sequential, realize the first hydraulic fluid port and second of rotary motor described in turning course (1)
Hydraulic fluid port is connected by second reversal valve (7), and the first hydraulic fluid port of the rotary motor (1) and the second hydraulic fluid port pass through described
Damping is provided with the oil circuit of two reversal valves (7) connection；
In stopped process is turned round, first reversal valve (6) is closed, the first hydraulic fluid port of the rotary motor (1) and the second oil
Mouth passes through second reversal valve (7) and connected；
After revolution stops, second reversal valve (7) is closed, and the first hydraulic fluid port and the second hydraulic fluid port of the rotary motor (1) break
Open.
2. there is the revolution hydraulic control system of sectional control function as claimed in claim 1, it is characterised in that：First commutation
Valve (6) comprises at least middle position, the first working position and the second working position, and first reversal valve (6) is in the middle position, described time
The first hydraulic fluid port and the second hydraulic fluid port for turning motor (1) enter without hydraulic oil, and first reversal valve (6) is in first working position
When, the first hydraulic fluid port oil-feed of the rotary motor (1), the second hydraulic fluid port oil return of the rotary motor (1), first reversal valve
(6) in second working position, the second hydraulic fluid port oil-feed of the rotary motor (1), the first hydraulic fluid port of the rotary motor (1)
Oil return.
3. there is the revolution hydraulic control system of sectional control function as claimed in claim 2, it is characterised in that：First commutation
First hydraulic control end of valve (6) connects with the first pilot control opening of the revolving valve (4), and the second of first reversal valve (6)
Hydraulic control end connects with the second pilot control opening of the revolving valve (4).
4. the revolution hydraulic control system with sectional control function as described in claim any one of 1-3, it is characterised in that：It is described
Second reversal valve (7) comprises at least cut-off position and working position, second reversal valve (7) are in the cut-off position, the revolution
First hydraulic fluid port of motor (1) and the second hydraulic fluid port disconnect, and second reversal valve (7) is in the working position, the rotary motor
(1) the first hydraulic fluid port and the second hydraulic fluid port is connected by second reversal valve (7).
5. there is the revolution hydraulic control system of sectional control function as claimed in claim 1, it is characterised in that：Second commutation
The hydraulic control end of valve (7) is communicated with the oil-out of shuttle valve (5), and two oil inlets of the shuttle valve (5) correspond to and the revolution respectively
First pilot control opening of valve (4) connects with the second pilot control opening.
A kind of 6. crane, it is characterised in that：Including there is returning for sectional control function as described in claim any one of 1-5
Turn hydraulic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410693450.3A CN105439018B (en) | 2014-11-26 | 2014-11-26 | Revolution hydraulic control system and crane with sectional control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410693450.3A CN105439018B (en) | 2014-11-26 | 2014-11-26 | Revolution hydraulic control system and crane with sectional control function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105439018A CN105439018A (en) | 2016-03-30 |
| CN105439018B true CN105439018B (en) | 2018-02-16 |
Family
ID=55549743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410693450.3A Active CN105439018B (en) | 2014-11-26 | 2014-11-26 | Revolution hydraulic control system and crane with sectional control function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105439018B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061389B (en) * | 2017-04-11 | 2018-12-14 | 长沙学院 | The Antisway Control System and method of engineering machinery rotary braking |
| CN113202829A (en) * | 2021-05-25 | 2021-08-03 | 三一重机有限公司 | Motor assembly, traveling drive system and working machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09156875A (en) * | 1995-12-12 | 1997-06-17 | Hitachi Constr Mach Co Ltd | Hydraulic control device for construction machine |
| CN102022393A (en) * | 2010-12-30 | 2011-04-20 | 常德中联重科液压有限公司 | Rotary valve and rotary control loop using same |
| CN102229416A (en) * | 2011-06-29 | 2011-11-02 | 三一汽车起重机械有限公司 | Closed-type rotary hydraulic system for crane and crane |
| CN103225634A (en) * | 2013-05-10 | 2013-07-31 | 中联重科股份有限公司 | Pilot control module, pilot brake control system and engineering machinery |
| CN103541944A (en) * | 2013-11-06 | 2014-01-29 | 徐州重型机械有限公司 | Rotation buffer valve, rotation buffer control device and crane rotation hydraulic system |
| CN103754781A (en) * | 2013-12-31 | 2014-04-30 | 浙江三一装备有限公司 | Hydraulic system and crane |
| CN204324770U (en) * | 2014-11-26 | 2015-05-13 | 徐州重型机械有限公司 | There is revolution hydraulic control system and the hoisting crane of sectional control function |
-
2014
- 2014-11-26 CN CN201410693450.3A patent/CN105439018B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09156875A (en) * | 1995-12-12 | 1997-06-17 | Hitachi Constr Mach Co Ltd | Hydraulic control device for construction machine |
| CN102022393A (en) * | 2010-12-30 | 2011-04-20 | 常德中联重科液压有限公司 | Rotary valve and rotary control loop using same |
| CN102229416A (en) * | 2011-06-29 | 2011-11-02 | 三一汽车起重机械有限公司 | Closed-type rotary hydraulic system for crane and crane |
| CN103225634A (en) * | 2013-05-10 | 2013-07-31 | 中联重科股份有限公司 | Pilot control module, pilot brake control system and engineering machinery |
| CN103541944A (en) * | 2013-11-06 | 2014-01-29 | 徐州重型机械有限公司 | Rotation buffer valve, rotation buffer control device and crane rotation hydraulic system |
| CN103754781A (en) * | 2013-12-31 | 2014-04-30 | 浙江三一装备有限公司 | Hydraulic system and crane |
| CN204324770U (en) * | 2014-11-26 | 2015-05-13 | 徐州重型机械有限公司 | There is revolution hydraulic control system and the hoisting crane of sectional control function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105439018A (en) | 2016-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2015117338A1 (en) | Single-hydraulic motor double-loop control system | |
| US10822211B2 (en) | Crane hydraulic control system and crane | |
| CN102229328B (en) | Vehicle mechanical energy-saving hydraulic system with multi-pump confluence | |
| WO2012150652A1 (en) | Rotation-type working machine | |
| CN105539132B (en) | Dual power drive system, engineering machinery vehicle and control method | |
| CN108087356B (en) | Front wheel drive control valve of land leveler and hydraulic system | |
| JP6089665B2 (en) | Hydraulic control equipment for construction machinery | |
| CN105776046B (en) | A kind of hybrid hoisting hydraulic system and the crane using the system | |
| JP6013503B2 (en) | Construction machinery | |
| CN105439018B (en) | Revolution hydraulic control system and crane with sectional control function | |
| CN104372823A (en) | Recovering system for slewing and braking energy of excavator | |
| CN102395505B (en) | Transport vehicle | |
| CN109955895B (en) | Multi-mode steering control hydraulic system for special vehicle | |
| CN204324770U (en) | There is revolution hydraulic control system and the hoisting crane of sectional control function | |
| JP2015229880A (en) | Hybrid construction machine | |
| CN109017981B (en) | Walking machine and hydraulic steering system thereof | |
| CN105253792B (en) | Rotation control system for crane | |
| JP5823932B2 (en) | Hydraulic drive unit for construction machinery | |
| CN106314137B (en) | A kind of walking control for brake hydraulic system and scissor aerial work platform | |
| CN111120437B (en) | Multimode steering traveling system of engineering machinery | |
| CN203062948U (en) | Hydraulic pilot control system of oil-liquid hybrid power concrete mixer truck | |
| CN105604109B (en) | A kind of hydraulic regeneration system of excavator swing arm | |
| CN205168620U (en) | Quiet hydrostatic steering system of tractor | |
| CN203890013U (en) | Double-pump oil supply and energy recovery type forklift hydraulic system | |
| CN216111499U (en) | Hydraulic system of concrete mixer truck |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |