CN103122894A - Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment - Google Patents
Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment Download PDFInfo
- Publication number
- CN103122894A CN103122894A CN2012104182067A CN201210418206A CN103122894A CN 103122894 A CN103122894 A CN 103122894A CN 2012104182067 A CN2012104182067 A CN 2012104182067A CN 201210418206 A CN201210418206 A CN 201210418206A CN 103122894 A CN103122894 A CN 103122894A
- Authority
- CN
- China
- Prior art keywords
- oil circuit
- oil
- main valve
- communicated
- hydraulic 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.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
- F15B2211/50527—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves using cross-pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7058—Rotary output members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/85—Control during special operating conditions
- F15B2211/853—Control during special operating conditions during stopping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8606—Control during or prevention of abnormal conditions the abnormal condition being a shock
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic system for controlling rotation of a boom and a control method thereof. The hydraulic system comprises a hydraulic motor, a main valve, a hydraulic pump and an oil tank. When the main valve controls the hydraulic motor to rotate, an oil inlet passage of the hydraulic motor is communicated with the hydraulic pump, and an oil return passage is communicated with the oil tank. After the main valve controls the hydraulic motor to stop rotating, the oil inlet passage and the oil return passage are both locked. The hydraulic system comprises a controller and a detection device. After the main valve controls the hydraulic motor to stop rotating, the detection device is capable of detecting pressure value of the oil return passage, and the controller controls the degree of opening of the main valve based on the pressure value so as to enable the oil return passage to be communicated with the oil tank. Therefore, when the boom starts to stop rotating and the oil inlet passage and the oil return passage are locked, the degree of opening of the main valve is controlled based on the pressure changes of the oil return passage so that the oil return passage can be communicated with the oil tank again, pressure cannot be accumulated in the oil return passage, and thus rebounding occurring after the boom stops rotating is avoided. The invention further discloses concrete pumping equipment provided with the hydraulic system for controlling rotation of the boom.
Description
Technical field
The present invention relates to the rotating hydraulic control of jib field, particularly, relate to a kind of concrete pumping equipment of controlling the rotating hydraulic system of jib, controlling method and this hydraulic system of use.
Background technique
In various engineering machinery, how can use the jib Turning course, for example the concrete mixer in concrete pumping equipment, perhaps rubber tired crane etc.Wherein, concrete mixer is a kind of modern architecture equipment for the continuous concreting construction.It has the advantages such as maneuverability, efficiency of construction is high, construction quality good, environmental pollution is little and is widely used in the modern architecture construction.In concrete mixer, can change easily the cloth point by luffing or the revolution of jib, wherein the revolution of its jib is usually by fluid motor-driven.Large and the arm of force is very long due to concrete pump truck arm weight, therefore accurately controlling to the jib revolution, very large this of its rotary inertia bring larger difficulty.Especially in concrete pump truck arm revolution course of action, the stability of its rotary braking directly affects location and the handling safety of cloth point.
Particularly, because the rotary inertia of pumping vehicle arm rack is very large, even the stall of HYDRAULIC CONTROL SYSTEM oil hydraulic motor, and jib is also still in revolution.This can cause the pressure of hydraulic rotary motor in-line to reduce and the increase of oil circuit pressure, and this kind variation tendency continues for some time the clockwise revolution of rear jib and stops.This moment, the oil circuit of hydraulic rotary motor can not flow out and the compressed elevated pressures of having put aside due to the locked fluid that makes, for example this pressure can make oil hydraulic motor round about namely rotate counterclockwise along cursor backward after stopping at jib, thereby oil hydraulic motor can drive jib and rotates counterclockwise.Rotating counterclockwise of jib equally can be through " turning anticlockwise-stopping-revolution clockwise " process at this moment.And so forth until the rotary kinetic energy of the concrete arm form with heat is exhausted.Concrete pump truck arm is just similar in this in the turning anticlockwise situation.
Therefore, this mode of the prior art can make concrete pump truck arm revolution can produce reversal phenomenon when stopping, i.e. rebound phenomena, and can follow repeatedly reciprocally swinging.This brings larger hidden danger for location and the handling safety of concrete mixer cloth point.
Summary of the invention
An object of the present invention is to provide the rotating hydraulic system of a kind of control jib, this hydraulic system can not produce rebound phenomena after jib begins stall, thus the accurate positioning of jib and safe.
Another object of the present invention is to provide a kind of concrete pumping equipment, and this concrete pumping equipment uses the revolution of the rotating HYDRAULIC CONTROL SYSTEM jib of control jib provided by the invention.
Another purpose of body of the present invention is to provide a kind of controlling method of controlling the rotating hydraulic system of jib, and this controlling method can make jib not produce rebound phenomena in beginning after stall, thereby makes the accurate positioning of jib and safe.
to achieve these goals, the invention provides the rotating hydraulic system of a kind of control jib, comprise and drive the rotating oil hydraulic motor of jib, controlling oil hydraulic motor rotates and the main valve of stall and oil hydraulic pump and the fuel tank that is communicated with this main valve, when described main valve is controlled described oil hydraulic motor rotation, the in-line of described oil hydraulic motor is communicated with described oil hydraulic pump, oil circuit is communicated with described fuel tank, after the described oil hydraulic motor of described main valve control begins stall, described in-line and oil circuit are all locked, wherein, described hydraulic system comprises controller and the detection device of mutual electrical connection, after the described oil hydraulic motor of described main valve control begins stall, described detection device can detect the force value of the oil circuit of described oil hydraulic motor, described controller is controlled the aperture of described main valve according to this force value, so that described oil circuit and described fuel tank are communicated with.
Preferably, described hydraulic system comprises the database that is electrically connected to controller, records the main valve opening value corresponding with described force value in this database, and described controller is according to controlling the aperture of described main valve with the main valve opening value of described force value coupling.
Preferably, be provided with equilibrium valve between described oil hydraulic motor and described main valve, after described oil hydraulic motor stall, the locked described in-line of described equilibrium valve and described oil circuit.
Preferably, described main valve is electro-hydraulic proportion reversing valve
preferably, described oil hydraulic motor comprises the first oil circuit and the second oil circuit that is communicated with the actuator port of described main valve, described main valve is the three-position electromagnetic selector valve, meta at this three-position electromagnetic selector valve, described oil hydraulic motor stall, described the first oil circuit and described the second oil circuit are all locked, right position at this three-position electromagnetic selector valve, described oil hydraulic motor forward, described the first oil circuit is described in-line, described the second oil circuit is described oil circuit, left position at this three-position electromagnetic selector valve, described oil hydraulic motor counter-rotating, described the first oil circuit is described oil circuit, described the second oil circuit is described in-line.
preferably, described equilibrium valve comprises the first balance module and the second balance module, this first balance module is serially connected on described the first oil circuit, and comprise the first sequence valve parallel with one another and the first one-way valve, described the second balance module is serially connected on described the second oil circuit, and comprise the second sequence valve parallel with one another and the second one-way valve, described the first one-way valve and described the second one-way valve all only allow fluid to flow to described oil hydraulic motor, the control port of described the first sequence valve is communicated with described the first oil circuit, the control port of described the second sequence valve is communicated with described the second hydraulic fluid port.
Preferably, described detection device comprises the first pressure transducer and the second pressure transducer, and described the first pressure transducer is for detection of the force value of described the first oil circuit, and described the second pressure transducer is for detection of the force value of described the second oil circuit.
preferably, described main valve is three six energising liquid proportional selector valves, and comprise the first filler opening, the second filler opening, oil outlet, the first actuator port, the second actuator port and the 3rd actuator port, described the first filler opening and the second filler opening all are communicated with oil hydraulic pump, described return opening is communicated with described fuel tank, described the first actuator port is communicated with described fuel tank, described the second actuator port is communicated with described the first oil circuit, described the 3rd actuator port is communicated with described the second oil circuit, meta at described main valve, described the first filler opening is communicated with described the first actuator port, described the second filler opening cut-off, described return opening all is communicated with the second actuator port and the 3rd actuator port, in the right position of described main valve, described the first filler opening and described the first actuator port all end, and described the second filler opening is communicated with described the second actuator port, and described return opening is communicated with described the 3rd actuator port, in the left position of described main valve, described the first filler opening and described the first actuator port all end, and described the second filler opening is communicated with described the 3rd actuator port, and described return opening is communicated with described the second actuator port.
According to a further aspect in the invention, also provide a kind of concrete pumping equipment, this concrete pumping equipment comprises the jib by HYDRAULIC CONTROL SYSTEM, and described hydraulic system is the rotating hydraulic system of control jib provided by the invention.
Preferably, described concrete pumping equipment is concrete mixer.
In accordance with a further aspect of the present invention, provide a kind of controlling method of controlling the rotating hydraulic system of jib, wherein, described hydraulic system is hydraulic system provided by the invention, and wherein, described controlling method comprises stall step, detecting step and control step; In described stall step, control described main valve with locked described in-line and described oil circuit, begin stall thereby control described oil hydraulic motor; In described detecting step, after described oil hydraulic motor begins stall, use described detection device to detect the force value of described oil circuit; In described control step, described controller is controlled the aperture of described main valve according to described force value, to open described oil circuit, described oil circuit and described fuel tank is communicated with; Repeat described detecting step and described control step, until the complete stall of described oil hydraulic motor.
Preferably, described main valve is the three-position electromagnetic selector valve, at the meta of this main valve, described in-line and oil circuit are locked, in the right position of described main valve, described oil hydraulic motor forward, left position at described main valve, the counter-rotating of described oil hydraulic motor, when the described oil hydraulic motor of needs when just changing stall into, in described stall step, described main valve correspondingly switches to meta from right position, in described control step, according to the force value of described oil circuit, control described main valve and keep correspondingly aperture in right position; When the described oil hydraulic motor of needs became stall from counter-rotating, in described stall step, described main valve correspondingly switched to meta from left position, in described control step, according to the force value of described oil circuit, controls described main valve and keeps correspondingly aperture at Zuo Weizhong.
Pass through technique scheme, in hydraulic system provided by the invention and controlling method thereof, after the needs jib begins stall, at first by can locked in-line and oil return after, then the pressure according to oil circuit changes the aperture of controlling main valve, so that oil circuit can be communicated with again with fuel tank, so that oil circuit can not put aside pressure, thereby avoid after the jib stall, rebound phenomena occuring, Location accuracy and the Security of jib are provided.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of the hydraulic system that provides of the preferred embodiment for the present invention, and wherein main valve is positioned at meta;
Fig. 2 is the structural representation of the hydraulic system that provides of the preferred embodiment for the present invention, and wherein main valve is positioned at right position;
Fig. 3 is the structural representation of the hydraulic system that provides of the preferred embodiment for the present invention, and wherein main valve is positioned at left position.
Description of reference numerals
1 oil hydraulic motor 2 main valves
3 oil hydraulic pump 4 fuel tanks
5 controller 6 detection devices
7 equilibrium valve 8 databases
71 first balance module 72 second balance modules
71a first sequence valve 72a the second sequence valve
71b first one-way valve 72b the second one-way valve
A first oil circuit b the second oil circuit
P1 the first oil inlet P 2 second filler openings
T return opening A the first actuator port
B the second actuator port C the 3rd actuator port
Embodiment
In the present invention; will be take the concrete mixer in concrete pumping equipment provided by the invention as example; introduce the rotating hydraulic system of control jib provided by the invention; need to prove; concrete mixer is only a preferred embodiment of the present invention, and other can use the field that the jib revolution is controlled, and for example hoist can be applicable to hydraulic system provided by the invention too; the present invention does not limit for the distortion of this type of application, and it also should fall into protection scope of the present invention.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
as shown in Figure 1 to Figure 3, the invention provides the rotating hydraulic system of a kind of control jib, comprise and drive the rotating oil hydraulic motor 1 of jib, controlling oil hydraulic motor 1 rotates and the main valve 2 of stall and oil hydraulic pump 3 and the fuel tank 4 that is communicated with this main valve 2, when main valve 2 is controlled oil hydraulic motor 1 rotation, the in-line of oil hydraulic motor 1 is communicated with oil hydraulic pump 3, oil circuit is communicated with fuel tank 4, after main valve 2 control oil hydraulic motors begin 1 stall, in-line and oil circuit are all locked, wherein, the mode of locked in-line and oil circuit has multiple, for example can be by having the locked oil circuit of O type M type Median Function selector valve of pressure holding function, usually when controlling the relatively large object such as jib in order to prevent unexpected the generation, can be aided with equilibrium valve in the field and realize the locked of oil circuit, being aided with equally 7 pairs of oil circuits of equilibrium valve in optimal way of the present invention carries out locked, following meeting describes the locked principle of equilibrium valve by reference to the accompanying drawings.
Due to after oil hydraulic motor 1 stall, oil circuit is by locked, therefore as saying in background technique, because the inertia of jib is larger, can make the oil circuit build pressure of oil hydraulic motor 1, thereby cause the jib bounce-back even to come and go vibration, thereby make Security and the jib location accuracy of the engineering machinery such as concrete mixer of using this oil system be interfered.In order to address this problem, hydraulic system provided by the invention comprises controller 5 and the detection device 6 of mutual electrical connection, wherein, after main valve 2 is controlled oil hydraulic motor 1 beginning stall, namely before the complete stall of oil hydraulic motor 1, detection device 6 can detect the force value of the oil circuit b of oil hydraulic motor 1, and controller 5 is controlled the aperture of main valve 2 according to this force value.Thereby can make locked oil circuit again be communicated with fuel tank according to the force value situation of change of oil circuit b, thereby make oil circuit can not put aside pressure, that is, can make the inertia of jib be discharged, thereby effectively solve the problem of jib resilience.
In addition, the present invention also provides a kind of controlling method of using hydraulic system provided by the invention, and wherein, this controlling method comprises stall step, detecting step and control step; In the stall step, control main valve with locked described in-line and described oil circuit, begin stall thereby control oil hydraulic motor, just main valve switches to off-position from the working position particularly, thus make the in-line that is communicated with oil hydraulic pump 3 and the oil circuit that is communicated with fuel tank 4 locked.This moment, oil hydraulic motor began to stop, and still due to the effect of inertia of jib, can accumulate pressure on oil circuit, if do not process this moment, can cause the to-and-fro motion of jib, the problems of the prior art namely occurred.
Therefore in the detecting step in controlling method provided by the invention, after oil hydraulic motor begins stall, can use detection device to detect the force value of oil circuit; And in controlling step, controller can be controlled the aperture of main valve according to this force value, to open oil circuit, oil circuit and fuel tank 4 are communicated with again; This moment is in the stalling of oil hydraulic motor, can not accumulate pressure in oil circuit, therefore the pressure of oil circuit can diminish, repeat above-mentioned detecting step and control step, be controller to control main valve 2 apertures with the opening value of the new force value that diminishes coupling, along with the stall of oil hydraulic motor is completed, that the force value of oil circuit gradually becomes is little, the aperture of main valve is also along with diminishing gradually, when thereby the opening value of final main valve is zero, make the complete stall of oil hydraulic motor.
Therefore in above-mentioned controlling method provided by the invention, can guarantee oil hydraulic motor from the beginning stall to the process of complete stall, can not accumulate pressure.Therefore can make the Location accuracy of jib and safe.
Need to prove, the mode of execution that can realize technique scheme has multiple, the structure of main valve for example, with and control the concrete mode etc. of oil hydraulic motor, for convenience of description, in this introduction preferred implementation wherein, this preferred implementation only is used for explanation the present invention, is not limited to the present invention.
As shown in Figure 1 to Figure 3, in the preferred embodiment of the present invention, hydraulic system comprises the database 8 that is electrically connected to controller 5, records the main valve opening value corresponding with force value in this database 8, and controller 5 is according to controlling the aperture of main valve 2 with the main valve opening value of force value coupling.That is, need to carry out test of many times for the jib of different model, find in the situation that can solve the technology of the present invention problem, the main valve opening value that can be complementary most with the oil circuit force value.Particularly, detection device 6 can detect in real time the force value of oil circuit and the oil circuit force value is fed back to controller 5, controller 5 can arrange different force value and extract frequency, and it is more that principle should be extracted the higher main valve opening value that arranges of frequency, thereby make control accuracy higher.This mode can be obtained by test of many times and operating experience by those skilled in the art, and the present invention does not do too much at this and gives unnecessary details.In addition, in order to realize that the aperture of main valve 2 is accurately controlled, main valve 2 is preferably the electro-hydraulic proportional valve selector valve, and namely controller 5 can pass through the size of current of the proportion electro-magnet of control main valve 2, to realize the proportional control to main valve 2.Certainly in other NM mode of executions; also can adopt general solenoid valve to realize; but the length that needs frequent this general solenoid valve of control to open and close and accurately control opening/closing time realizes purpose of the present invention, should fall into protection scope of the present invention equally for this type of distortion.
As described above, in the preferred embodiment of the present invention, adopt 7 pairs of in-lines of equilibrium valve and oil circuit to lock, namely preferably, be provided with equilibrium valve 7 between oil hydraulic motor 1 and main valve 2, after oil hydraulic motor 1 stall, the locked in-line of equilibrium valve 7 and oil circuit.Wherein, equilibrium valve can be the equilibrium valve of arbitrary form in related domain, and the present invention does not limit its structure and principle, and the use of various equilibrium valves all should drop in protection scope of the present invention.
In the preferred embodiment of the present invention, hydraulic system provided by the invention can be controlled oil hydraulic motor and realize rotating and reverse, direction by reference to the accompanying drawings, said forward refers to that oil hydraulic motor 1 turns clockwise herein, counter-rotating refers to that oil hydraulic motor 1 is rotated counterclockwise.Particularly, can switch by main valve the function realization of in-line and oil circuit.Wherein, oil hydraulic motor 1 comprises the first oil circuit a and the second oil circuit b that is communicated with the actuator port of main valve 3, main valve 2 is the three-position electromagnetic selector valve, at the meta of this three-position electromagnetic selector valve, oil hydraulic motor 1 stall, the first oil circuit a and the second oil circuit b are all locked, right position at this three-position electromagnetic selector valve, oil hydraulic motor 1 forward, the first oil circuit a is in-line, the second oil circuit b is oil circuit; In the left position of this three-position electromagnetic selector valve, oil hydraulic motor 1 counter-rotating, the first oil circuit a is oil circuit, the second oil circuit b is in-line.In this embodiment, working procedure is: when the needs oil hydraulic motor when just changing stall into, in the stall step, main valve correspondingly switches to meta from right position, controlling step, according to the force value of oil circuit, control main valve and keep correspondingly aperture in right position, to be communicated with oil circuit and fuel tank; When the needs oil hydraulic motor became stall from counter-rotating, in the stall step, main valve correspondingly switched to meta from left position, controlling step, according to the force value of oil circuit, controlled main valve and kept correspondingly aperture at Zuo Weizhong, with same connection oil circuit and fuel tank.
Based on this, equilibrium valve 7 can comprise two balance modules that are serially connected in respectively on the first oil circuit a and the second oil circuit b, these two corresponding oil circuits of the equal lockable of balance module, what it should be noted that employing in the present invention is integrated in an equilibrium valve in valve member with two balance modules, in other NM modes, these two balance modules independently can also be arranged as valve member.Can drop in protection scope of the present invention equally for this type of distortion.particularly, equilibrium valve 7 provided by the invention comprises the first balance module 71 and the second balance module 72, this first balance module 71 is serially connected on the first oil circuit a, and comprise the first sequence valve 71a parallel with one another and the first one-way valve 71b, the second balance module 72 is serially connected on the second oil circuit b, and comprise the second sequence valve 72a parallel with one another and the second one-way valve 71b, the first one-way valve 71b and the second one-way valve 72b all only allow fluid to flow to oil hydraulic motor, the control port of the first sequence valve 71a is communicated with the first oil circuit a, the control port of the second sequence valve 72a is communicated with the second hydraulic fluid port b.
Therefore, when wherein in-line has pressure oil, the sequence valve that can control oil circuit is opened, thereby make oil circuit to be communicated with fuel tank 4, make the oil hydraulic motor rotation, and when main valve 2 is positioned at meta, after being the oil hydraulic motor stall, when in-line did not have pressure oil, the sequence valve of oil circuit was not opened, by the locked oil circuit of one-way valve.Owing to being provided with balance module at the first oil circuit a and the second oil circuit b, no matter oil hydraulic motor 1 is got back to stop state from forward state or inverted status, all can be locked by equilibrium valve 7.In addition, in order to realize all realizing purpose of the present invention when rotating and reverse state, when namely the first oil circuit a and the second oil circuit b are respectively as oil circuit, can detect its force value, in the preferred embodiment of the present invention, detection device 6 comprises the first pressure transducer 61 and the second pressure transducer 62, the first pressure transducers 61 for detection of the force value of the first oil circuit a, and the second pressure transducer 62 is for detection of the force value of the second oil circuit b.Working state below in conjunction with accompanying drawing and main valve describes concrete working procedure.
Wherein, preferably, main valve 2 is three six energising liquid proportional selector valves, and comprise the first oil inlet P 1, the second oil inlet P 2, oil outlet T, the first actuator port A, the second actuator port B and the 3rd actuator port C, the first oil inlet P 1 and the second oil inlet P 2 all are communicated with oil hydraulic pump 3, and oil return inlet T is communicated with fuel tank 4, and the first actuator port A is communicated with fuel tank 4, the second actuator port B is communicated with the first oil circuit a, and the 3rd actuator port C is communicated with the second oil circuit b.
As shown in Figure 1, at the meta of main valve 2, the first oil inlet P 1 is communicated with the first actuator port A, the second oil inlet P 2 cut-offs, and oil return inlet T all is communicated with the second actuator port B and the 3rd actuator port C; That is, this moment, oil hydraulic pump 3 and fuel tank 4 were communicated with, therefore, the first oil circuit a and the second oil circuit b all do not have pressure oil to flow into, and this moment, the first oil circuit a and the second oil circuit b were all locked under the effect of equilibrium valve 7, namely can realize the locking of oil hydraulic motor, prevent that the perils such as free rotary from appearring in oil hydraulic motor.
And as shown in Figure 2, in the right position of main valve 2, the first oil inlet P 1 and the first actuator port all end, and the second oil inlet P 2 is communicated with the second actuator port B, and oil return inlet T is communicated with the 3rd actuator port C; The working oil that is oil hydraulic pump 3 can supply in the first oil circuit a by the second oil inlet P 2 and the second actuator port B, this moment, working oil flowed in oil hydraulic motor 1 by the first one-way valve 71b of the first balance module 71 of equilibrium valve 7, this moment, the first oil circuit a was as in-line, and the second oil circuit b is as oil circuit, therefore the second sequence valve 72a of the second balance module 72 can open, and realizes that namely the second oil circuit b is communicated with fuel tank 4 by the 3rd actuator port C and oil return inlet T.Can realize turning clockwise of oil hydraulic motor 1, i.e. forward this moment.
If need the forward of stop solution pressure motor 1 this moment, after the second oil circuit b is locked, beginning to detect the second oil circuit by the second pressure transducer 62 is the pressure of oil circuit, thereby control the aperture of main valve 2 according to the force value of this second oil circuit b, make the second oil circuit b again be communicated with fuel tank 4, until the complete stall of oil hydraulic motor 1.Thereby can not put aside pressure in the second oil circuit b, to prevent that jib rebounds after the oil hydraulic motor stall.
In like manner, in the left position of main valve 2, the first oil inlet P 1 and the first actuator port A all end as shown in Figure 3, and the second oil inlet P 2 is communicated with the 3rd actuator port C, and oil return inlet T is communicated with the second actuator port B.The working oil that is oil hydraulic pump 3 can supply in the second oil circuit b by the second oil inlet P 2 and the 3rd actuator port C, this moment, working oil flowed in oil hydraulic motor 1 by the first one-way valve 72b of the second balance module 72 of equilibrium valve 7, this moment, the second oil circuit b was as in-line, and the first oil circuit a is as oil circuit, therefore the first sequence valve 71a of the first balance module 71 can open, and realizes that namely the first oil circuit a is communicated with fuel tank 4 by the second actuator port B and oil return inlet T.Can realize being rotated counterclockwise of oil hydraulic motor 1 this moment, i.e. counter-rotating.If need the counter-rotating of stop solution pressure motor 1 this moment, after the first oil circuit a is locked, detecting the first oil circuit a by the first pressure transducer 61 is the pressure of oil circuit, thereby control the aperture of main valve 2 according to the force value of this first oil circuit a, make the first oil circuit a again be communicated with fuel tank 4, until the complete stall of oil hydraulic motor 1.Thereby can not put aside pressure in the first oil circuit a, to prevent that jib rebounds after the oil hydraulic motor stall.
Above-mentioned working procedure is only the working procedure in the preferred implementation methods of the present invention as shown in the figure; wherein; the kind of main valve 3 can also have other all kinds; the form that can also use those skilled in the art such as three position four-way directional control valve of M or Y type Median Function to expect; as long as can realize above-mentioned purpose of the present invention and above-mentioned working procedure, all should drop in protection scope of the present invention.
In sum, hydraulic system provided by the invention can be controlled the main valve aperture according to the force value of oil circuit, make oil circuit again to be communicated with fuel tank after locked, thereby can not put aside pressure in oil circuit at oil hydraulic motor 1 after the beginning stall, overcome the problem of jib bounce-back.And particularly the jib cloth precision of concrete mixer is high to make concrete pumping equipment provided by the invention, and Security is good.Therefore, the rotating hydraulic system of control jib provided by the invention and controlling method and use the concrete pumping equipment of this hydraulic system all to have higher practicability and promotional value.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned mode of execution; in technical conceive scope of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition, each concrete technical characteristics described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (12)
1. rotating hydraulic system of control jib, comprise and drive the rotating oil hydraulic motor of jib (1), control main valve (2) and the oil hydraulic pump (3) that is communicated with this main valve (2) and the fuel tank (4) of oil hydraulic motor (1) rotation and stall, when described main valve (2) is controlled described oil hydraulic motor (1) rotation, the in-line of described oil hydraulic motor (1) is communicated with described oil hydraulic pump (3), oil circuit is communicated with described fuel tank (4), after described main valve (2) is controlled described oil hydraulic motor (1) beginning stall, described in-line and oil circuit are all locked, it is characterized in that,
Described hydraulic system comprises controller (5) and the detection device (6) of mutual electrical connection, after described main valve (3) is controlled described oil hydraulic motor (4) beginning stall, described detection device (6) can detect the force value of the oil circuit of described oil hydraulic motor (4), described controller (5) is controlled the aperture of described main valve (3) according to this force value, so that described oil circuit and described fuel tank are communicated with.
2. hydraulic system according to claim 1, it is characterized in that, described hydraulic system comprises the database (8) that is electrically connected to controller (5), record the main valve opening value corresponding with described force value in this database (8), described controller (5) is according to controlling the aperture of described main valve (3) with the main valve opening value of described force value coupling.
3. hydraulic system according to claim 1 and 2, it is characterized in that, be provided with equilibrium valve (7) between described oil hydraulic motor (1) and described main valve (2), after described oil hydraulic motor (1) stall, the locked described in-line of described equilibrium valve (7) and described oil circuit.
4. hydraulic system according to claim 1, is characterized in that, described main valve (2) is electro-hydraulic proportion reversing valve.
5. hydraulic system according to claim 3, it is characterized in that, described oil hydraulic motor (1) comprises the first oil circuit (a) and the second oil circuit (b) that is communicated with the actuator port of described main valve (3), described main valve (2) is the three-position electromagnetic selector valve, meta at this three-position electromagnetic selector valve, described oil hydraulic motor (1) stall, described the first oil circuit (a) and described the second oil circuit (b) are all locked, right position at this three-position electromagnetic selector valve, described oil hydraulic motor (1) forward, described the first oil circuit (a) is described in-line, described the second oil circuit (b) is described oil circuit, left position at this three-position electromagnetic selector valve, described oil hydraulic motor (1) counter-rotating, described the first oil circuit (a) is described oil circuit, described the second oil circuit (b) is described in-line.
6. hydraulic system according to claim 5, it is characterized in that, described equilibrium valve (7) comprises the first balance module (71) and the second balance module (72), this first balance module (71) is serially connected on described the first oil circuit (a), and comprise the first sequence valve (71a) parallel with one another and the first one-way valve (71b), described the second balance module (72) is serially connected on described the second oil circuit (b), and comprise the second sequence valve (72a) parallel with one another and the second one-way valve (71b), described the first one-way valve (71b) and described the second one-way valve (72b) all only allow fluid to flow to described oil hydraulic motor, the control port of described the first sequence valve (71a) is communicated with described the first oil circuit (a), the control port of described the second sequence valve (72a) is communicated with described the second hydraulic fluid port (b).
7. hydraulic system according to claim 5, it is characterized in that, described detection device (6) comprises the first pressure transducer (61) and the second pressure transducer (62), described the first pressure transducer (61) is for detection of the force value of described the first oil circuit (a), and described the second pressure transducer (62) is for detection of the force value of described the second oil circuit (b).
8. hydraulic system according to claim 3, it is characterized in that, described main valve (2) is three six energising liquid proportional selector valves, and comprise the first filler opening (P1), the second filler opening (P2), oil outlet (T), the first actuator port (A), the second actuator port (B) and the 3rd actuator port (C), described the first filler opening (P1) and the second filler opening (P2) all are communicated with oil hydraulic pump (3), described return opening (T) is communicated with described fuel tank (4), described the first actuator port (A) is communicated with described fuel tank (4), described the second actuator port (B) is communicated with described the first oil circuit (a), described the 3rd actuator port (C) is communicated with described the second oil circuit (a),
Meta in described main valve (2), described the first filler opening (P1) is communicated with described the first actuator port (A), described the second filler opening (P2) cut-off, described return opening (T) all is communicated with the second actuator port (B) and the 3rd actuator port (C);
In the right position of described main valve (2), described the first filler opening (P1) and described the first actuator port all end, and described the second filler opening (P2) is communicated with described the second actuator port (B), and described return opening (T) is communicated with described the 3rd actuator port (C);
In the left position of described main valve (2), described the first filler opening (P1) and described the first actuator port all end, and described the second filler opening (P2) is communicated with described the 3rd actuator port (C), and described return opening (T) is communicated with described the second actuator port (B).
9. concrete pumping equipment, this concrete pumping equipment comprises by the jib of HYDRAULIC CONTROL SYSTEM, it is characterized in that, described hydraulic system is the rotating hydraulic system of the described control jib of any one in claim 1-8.
10. concrete pumping equipment according to claim 9, is characterized in that, described concrete pumping equipment is concrete mixer.
11. a controlling method of controlling the rotating hydraulic system of jib is characterized in that, described hydraulic system is the described hydraulic system of any one in claim 1-4, and wherein, described controlling method comprises stall step, detecting step and control step;
In described stall step, control described main valve with locked described in-line and described oil circuit, begin stall thereby control described oil hydraulic motor;
In described detecting step, after described oil hydraulic motor begins stall, use described detection device to detect the force value of described oil circuit;
In described control step, described controller is controlled the aperture of described main valve according to described force value, to open described oil circuit, described oil circuit and described fuel tank is communicated with;
Repeat described detecting step and described control step, until the complete stall of described oil hydraulic motor.
12. controlling method according to claim 11 is characterized in that, described main valve is the three-position electromagnetic selector valve, at the meta of this main valve, described in-line and oil circuit are locked, in the right position of described main valve, described oil hydraulic motor forward, in the left position of described main valve, described oil hydraulic motor counter-rotating
When the described oil hydraulic motor of needs when just changing stall into,
In described stall step, described main valve correspondingly switches to meta from right position, in described control step, according to the force value of described oil circuit, controls described main valve and keep correspondingly aperture in right position;
When the described oil hydraulic motor of needs becomes stall from counter-rotating,
In described stall step, described main valve correspondingly switches to meta from left position, in described control step, according to the force value of described oil circuit, controls described main valve and keeps correspondingly aperture at Zuo Weizhong.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210418206.7A CN103122894B (en) | 2012-10-26 | 2012-10-26 | Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment |
| PCT/CN2013/076467 WO2014063490A1 (en) | 2012-10-26 | 2013-05-30 | Hydraulic system for controlling boom to rotate and control method therefor and concrete pumping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210418206.7A CN103122894B (en) | 2012-10-26 | 2012-10-26 | Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103122894A true CN103122894A (en) | 2013-05-29 |
| CN103122894B CN103122894B (en) | 2015-04-15 |
Family
ID=48453984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210418206.7A Active CN103122894B (en) | 2012-10-26 | 2012-10-26 | Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103122894B (en) |
| WO (1) | WO2014063490A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644171A (en) * | 2013-12-09 | 2014-03-19 | 中联重科股份有限公司 | Hydraulic motor locked-rotor prevention control system and method and engineering machine |
| WO2014063490A1 (en) * | 2012-10-26 | 2014-05-01 | 中联重科股份有限公司 | Hydraulic system for controlling boom to rotate and control method therefor and concrete pumping equipment |
| CN104863366A (en) * | 2014-12-04 | 2015-08-26 | 北汽福田汽车股份有限公司 | Arm frame control system of concrete pumping device |
| WO2015165344A1 (en) * | 2014-04-29 | 2015-11-05 | 三一汽车制造有限公司 | Rotary hydraulic system and concrete conveying pump apparatus |
| CN105485076A (en) * | 2014-11-07 | 2016-04-13 | 芜湖新兴铸管有限责任公司 | Hydraulic transmission system of centrifugal lining coating machine |
| CN107061390A (en) * | 2017-04-12 | 2017-08-18 | 长沙学院 | Antisway Control System and method during a kind of engineering machinery rotary braking |
| CN107061389A (en) * | 2017-04-11 | 2017-08-18 | 长沙学院 | The Antisway Control System and method of engineering machinery rotary braking |
| CN109249848A (en) * | 2018-09-05 | 2019-01-22 | 上海中荷环保有限公司 | Transport vehicle hydraulic system and transport vehicle |
| CN113586557A (en) * | 2021-07-23 | 2021-11-02 | 三一汽车制造有限公司 | Arm support control method, device and system of pumping vehicle and pumping vehicle |
| CN114753993A (en) * | 2022-03-25 | 2022-07-15 | 江铃汽车股份有限公司 | Noise reduction method and system for automobile oil pump |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351276B (en) * | 2015-12-03 | 2017-09-19 | 徐州重型机械有限公司 | Turn round hydraulic control system, method and crane |
| CN107399684A (en) * | 2016-05-21 | 2017-11-28 | 中船绿洲镇江船舶辅机有限公司 | A kind of hydraulic operation interlock control |
| EP3290386A1 (en) * | 2016-08-30 | 2018-03-07 | Putzmeister Engineering GmbH | Hydraulic slewing gear drive |
| CN108118743B (en) * | 2018-01-16 | 2023-07-18 | 浙江大学 | Hydraulic excavator self-adaptive neural network moment control device and method |
| CN109516419B (en) * | 2018-12-08 | 2024-01-30 | 安徽柳工起重机有限公司 | Safety redundant control device for overhead working truck |
| CN112798251B (en) * | 2021-01-04 | 2022-12-02 | 浙江三一装备有限公司 | Method and system for diagnosing health of boom of dynamic compactor and dynamic compactor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5486077A (en) * | 1977-12-20 | 1979-07-09 | Nippon Air Brake Co Ltd | Actuator brake circuit |
| JPS59155604A (en) * | 1983-02-22 | 1984-09-04 | Daikin Ind Ltd | Brake circuit |
| CN1173219A (en) * | 1994-12-08 | 1998-02-11 | 株式会社小松制作所 | Device for preventing the reversal of a hydraulic actuator |
| EP1403438A1 (en) * | 2002-09-25 | 2004-03-31 | Husco International, Inc. | Method for preventing bounce oscillations of inertial masses caused by accelerations in hydraulically powered equipment |
| CN201884349U (en) * | 2010-09-15 | 2011-06-29 | 杭州骐瑞机电设备有限公司 | Cushioning device of revolving arm support |
| CN202492341U (en) * | 2012-02-21 | 2012-10-17 | 徐州海伦哲专用车辆股份有限公司 | Descend arm protection system of arm support |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4855852B2 (en) * | 2006-07-04 | 2012-01-18 | 日立建機株式会社 | Motor controller for construction machinery |
| DE102008034028A1 (en) * | 2007-11-14 | 2009-05-28 | Terex-Demag Gmbh | Hydraulic control circuit for overriding a slewing gear drive |
| CN101451548B (en) * | 2007-12-04 | 2010-10-13 | 中南大学 | Hydraulic transmission system implementing rapid starting/stopping and stable steering for large inertia load |
| CN102155447B (en) * | 2011-03-15 | 2013-06-05 | 徐州重型机械有限公司 | Rotating hydraulic system of crane and rotating buffer valve thereof |
| CN102278338B (en) * | 2011-08-02 | 2014-03-19 | 上海三一科技有限公司 | Control system capable of preventing startup reversion, engineering machine and using method for control system |
| CN102312872A (en) * | 2011-08-19 | 2012-01-11 | 陈海波 | Hydraulic balance speed limit control device of concrete pump truck |
| CN102493967A (en) * | 2011-11-21 | 2012-06-13 | 三一汽车起重机械有限公司 | Crane, rotation control system thereof and rotation buffering valve of crane |
| CN103122894B (en) * | 2012-10-26 | 2015-04-15 | 中联重科股份有限公司 | Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment |
-
2012
- 2012-10-26 CN CN201210418206.7A patent/CN103122894B/en active Active
-
2013
- 2013-05-30 WO PCT/CN2013/076467 patent/WO2014063490A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5486077A (en) * | 1977-12-20 | 1979-07-09 | Nippon Air Brake Co Ltd | Actuator brake circuit |
| JPS59155604A (en) * | 1983-02-22 | 1984-09-04 | Daikin Ind Ltd | Brake circuit |
| CN1173219A (en) * | 1994-12-08 | 1998-02-11 | 株式会社小松制作所 | Device for preventing the reversal of a hydraulic actuator |
| EP1403438A1 (en) * | 2002-09-25 | 2004-03-31 | Husco International, Inc. | Method for preventing bounce oscillations of inertial masses caused by accelerations in hydraulically powered equipment |
| CN201884349U (en) * | 2010-09-15 | 2011-06-29 | 杭州骐瑞机电设备有限公司 | Cushioning device of revolving arm support |
| CN202492341U (en) * | 2012-02-21 | 2012-10-17 | 徐州海伦哲专用车辆股份有限公司 | Descend arm protection system of arm support |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014063490A1 (en) * | 2012-10-26 | 2014-05-01 | 中联重科股份有限公司 | Hydraulic system for controlling boom to rotate and control method therefor and concrete pumping equipment |
| CN103644171B (en) * | 2013-12-09 | 2016-08-17 | 中联重科股份有限公司 | Hydraulic motor blocking rotation control system and blocking rotation method, engineering machinery |
| CN103644171A (en) * | 2013-12-09 | 2014-03-19 | 中联重科股份有限公司 | Hydraulic motor locked-rotor prevention control system and method and engineering machine |
| WO2015165344A1 (en) * | 2014-04-29 | 2015-11-05 | 三一汽车制造有限公司 | Rotary hydraulic system and concrete conveying pump apparatus |
| CN105485076A (en) * | 2014-11-07 | 2016-04-13 | 芜湖新兴铸管有限责任公司 | Hydraulic transmission system of centrifugal lining coating machine |
| CN104863366A (en) * | 2014-12-04 | 2015-08-26 | 北汽福田汽车股份有限公司 | Arm frame control system of concrete pumping device |
| CN107061389A (en) * | 2017-04-11 | 2017-08-18 | 长沙学院 | The Antisway Control System and method of engineering machinery rotary braking |
| CN107061390A (en) * | 2017-04-12 | 2017-08-18 | 长沙学院 | Antisway Control System and method during a kind of engineering machinery rotary braking |
| CN109249848A (en) * | 2018-09-05 | 2019-01-22 | 上海中荷环保有限公司 | Transport vehicle hydraulic system and transport vehicle |
| CN109249848B (en) * | 2018-09-05 | 2024-02-27 | 上海中荷环保有限公司 | Transport vehicle hydraulic system and transport vehicle |
| CN113586557A (en) * | 2021-07-23 | 2021-11-02 | 三一汽车制造有限公司 | Arm support control method, device and system of pumping vehicle and pumping vehicle |
| CN113586557B (en) * | 2021-07-23 | 2023-11-17 | 三一汽车制造有限公司 | Arm support control method, device and system of pumping vehicle and pumping vehicle |
| CN114753993A (en) * | 2022-03-25 | 2022-07-15 | 江铃汽车股份有限公司 | Noise reduction method and system for automobile oil pump |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014063490A1 (en) | 2014-05-01 |
| CN103122894B (en) | 2015-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103122894B (en) | Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment | |
| CN203879825U (en) | Cantilever crane rotation hydraulic system and concrete conveying pump device | |
| CN102874697B (en) | Hydraulic system for controlling amplitude variation of arm support and crane | |
| CN204341185U (en) | Four-mode steering hydraulic control system and there is its vehicle | |
| CN102733442A (en) | Gyration energy recycling system of hydraulic excavator | |
| CN104061199B (en) | Hoist, single-cylinder bolt type telescopic boom and bolt mechanism hydraulic system thereof | |
| CN103015725B (en) | Boom hydraulic system, control method thereof, boom system and concrete pumping equipment | |
| CN203161689U (en) | Supporting leg and hydraulic system thereof and engineering machinery | |
| CN103397677B (en) | Based on hydraulic excavator movable arm loop and the control method thereof of hydraulic transformer | |
| CN102877783A (en) | Rotary drilling rig and hydraulic rotation system thereof | |
| CN103669462A (en) | Mixed-type hydraulic device | |
| CN101962068B (en) | Hydraulic control system for fin stabilizer | |
| CN202967952U (en) | Rotary control hydraulic system and crane | |
| CN202937011U (en) | Arm support hydraulic system and arm support system and concrete pumping equipment | |
| CN202280674U (en) | Crane control chamber swing hydraulic system and crane | |
| CN204003694U (en) | A kind of hydraulic system of hoist and pilot-operated type control valve thereof | |
| CN208778368U (en) | A kind of Direct Travel double acting hydraulic actuating mechanism | |
| CN202937013U (en) | Cantilever crane hydraulic system, cantilever crane system and concrete pumping equipment | |
| CN204003684U (en) | Hoist, single-cylinder bolt type telescopic boom and bolt mechanism hydraulic system thereof | |
| CN105604109A (en) | Hydraulic regeneration system of movable arm of excavator | |
| CN202988589U (en) | Closed type hydraulic system using changeover valve set | |
| CN203641144U (en) | Double-pump bidirectional confluence valve group for concrete arm support pump truck | |
| CN202789786U (en) | Hydraulic system and concrete pump truck and engineering machine with same | |
| CN201538425U (en) | Hydraulic control system for stabilizing fin | |
| CN204284053U (en) | For guide's oil circuit relief arrangement and the pilot hydraulic control system of virtual wall function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |