CN109931304A - Hydraulic system and its control system and method, engineering machinery - Google Patents
Hydraulic system and its control system and method, engineering machinery Download PDFInfo
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- CN109931304A CN109931304A CN201910310714.5A CN201910310714A CN109931304A CN 109931304 A CN109931304 A CN 109931304A CN 201910310714 A CN201910310714 A CN 201910310714A CN 109931304 A CN109931304 A CN 109931304A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004891 communication Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 description 86
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000002828 fuel tank Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
Present disclose provides a kind of hydraulic system and its control systems and method, engineering machinery, are related to technical field of engineering machinery.The hydraulic system includes: leveling cyclinder, is leveled for the workbench to engineering machinery；Automatic leveling reversal valve, comprising: the first actuator port being connected to the rodless cavity of the leveling cyclinder, the second actuator port, the first oil return opening and the first oil inlet by the first branch's oil inlet oil circuit and main oil inlet oil communication that are connected to the rod chamber of the leveling cyclinder；Manual leveling reversal valve, comprising: the third actuator port being connected to the rodless cavity of the leveling cyclinder, the 4th actuator port, the second oil return opening and the second oil inlet by second branch's oil inlet oil circuit and the main oil inlet oil communication that are connected to the rod chamber of the leveling cyclinder；With the first cutting control valve, it is arranged on the first branch oil inlet oil circuit.
Description
Technical field
This disclosure relates to technical field of engineering machinery more particularly to a kind of hydraulic system and its control system and method, work
Journey is mechanical.
Background technique
Fire fighting truck is widely used in the enterprise that fire brigade, petroleum chemical enterprise etc. need self-built fire-fighting equipment.Truck
The automatic horizontal control system and manual leveling system of workbench must be equipped with.When truck carries out operation, automatic leveling system
System must workbench can be leveled automatically, the moment guarantee workbench relative level tilt angle at 0 degree or so, with
Guarantee the personal safety of fire fighter.
When the tilt angle of workbench is more than preset range, automatic horizontal control system must be controlled at once and stopped working, with
Prevent workbench from tumbling.
Summary of the invention
Inventors noted that the automatic leveling in automatic horizontal control system changes when control automatic horizontal control system stops working
To valve it is possible that clamping stagnation problem, that is, not can guarantee automatic leveling reversal valve power-off back valve core it is just placed in the middle so that oil circuit is complete
It is complete to disconnect, it is moved upwardly or downwardly always so as to cause workbench.
If force start manual leveling system carries out hand in the case where the clamping stagnation problem of automatic leveling reversal valve is not repaired
Dynamic Levelling operation, then automatic leveling reversal valve will drive workbench under the pressure-driven of hydraulic system and continue to tumble, harm
The personal safety of fire fighter.
To solve the above-mentioned problems, the embodiment of the present disclosure provides a kind of hydraulic system.
According to the one side of the embodiment of the present disclosure, a kind of hydraulic system is provided, comprising: leveling cyclinder, for engineering machine
The workbench of tool is leveled；Automatic leveling reversal valve, comprising: the first work being connected to the rodless cavity of the leveling cyclinder
Hydraulic fluid port, the second actuator port being connected to the rod chamber of the leveling cyclinder, the first oil return opening and by the oil inlet of the first branch oil
First oil inlet of Lu Yuzhu oil inlet oil communication；Manual leveling reversal valve, comprising: be connected to the rodless cavity of the leveling cyclinder
Third actuator port, the 4th actuator port, the second oil return opening and by second that are connected to the rod chamber of the leveling cyclinder
Second oil inlet of branch's oil inlet oil circuit and the main oil inlet oil communication；With the first cutting control valve, it is arranged described first
On branch's oil inlet oil circuit.
In some embodiments, first actuator port passes through the rodless cavity of the first working oil path and the leveling cyclinder
Connection, second actuator port are connected to by the second working oil path with the rod chamber of the leveling cyclinder；The third work
Hydraulic fluid port be connected to by third working oil path with first working oil path, the 4th actuator port pass through the 4th working oil path and
The second working oil path connection.
In some embodiments, the hydraulic system further includes at least one of following: the second cutting control valve, setting
In first working oil path；Third cuts off control valve, is arranged in second working oil path.
In some embodiments, the hydraulic system further include: balanced valve, setting is in first working oil path and described
In second working oil path.
In some embodiments, first oil return opening is connected to by first branch's oil return circuit with main oil return circuit, institute
The second oil return opening is stated to be connected to by second branch's oil return circuit with the main oil return circuit.
According to the another aspect of the embodiment of the present disclosure, a kind of control system is provided, for controlling any one above-mentioned implementation
Hydraulic system described in example, the control system includes: angular transducer, for measuring the tilt angle of the workbench；
Flame-out relay starts mechatronics with the engineering machinery；And controller, with the angular transducer, it is described it is flame-out after
Electric appliance, the automatic leveling reversal valve, the manual leveling reversal valve and the first cutting control valve electrical connection, in institute
Tilt angle is stated beyond in the case where the preset range, the control flame-out relay power is so that the engine is put out
Fire, and control the automatic leveling reversal valve and the first cutting control valve power-off；Controlling the automatic leveling reversal valve
After the first cutting control valve power-off, controls the manual leveling reversal valve and be powered.
In some embodiments, the controller is also used to the case where the tilt angle is beyond the preset range
Under, the power-off of at least one of the second cutting control valve of control and third cutting control valve.
In some embodiments, the control system further include: proportional amplifier, with the angular transducer and it is described from
Dynamic leveling reversal valve electrical connection, it is described automatic for controlling in the case where the tilt angle is without departing from the preset range
Reversal valve is leveled so that the tilt angle is in the preset range；The angular transducer is also used at the inclination angle
For degree beyond in the case where the preset range, Xiang Suoshu controller sends switching signal；The controller is used in the inclination
In the case that angle is without departing from the preset range, controls the first cutting control valve and the proportional amplifier is powered；?
The flame-out relay power is controlled after receiving the switching signal so that the engine misses, and controls described first
Cutting control valve powers off and controls the proportional amplifier power-off to control the automatic leveling reversal valve power-off.
In some embodiments, the controller is also used to the case where the tilt angle is without departing from the preset range
Under, it controls the first cutting control valve and is powered, and control the automatic leveling reversal valve so that the tilt angle is in institute
It states in preset range.
According to the another aspect of the embodiment of the present disclosure, a kind of engineering machinery is provided, comprising: any one above-mentioned embodiment institute
The hydraulic system stated；With control system described in any one above-mentioned embodiment.
In some embodiments, the engineering machinery includes fire fighting truck.
According to the embodiment of the present disclosure in another aspect, a kind of control method is provided, for controlling any one above-mentioned implementation
Hydraulic system described in example, the control method includes: the tilt angle of the workbench of survey engineering machinery；In the inclination
In the case that angle exceeds preset range, the engine misses of the engineering machinery are controlled, and control the automatic leveling commutation
Valve and the first cutting control valve power-off；It is powered off in the control automatic leveling reversal valve and the first cutting control valve
Afterwards, the manual leveling reversal valve is controlled to be powered.
In some embodiments, the control method further include: exceed the feelings of the preset range in the tilt angle
Under condition, the power-off of at least one of the second cutting control valve of control and third cutting control valve.
In some embodiments, the control method further include: in the tilt angle without departing from the preset range
In the case of, it controls the first cutting control valve and is powered, and control the automatic leveling reversal valve so that the tilt angle
In the preset range.
In the hydraulic system that the embodiment of the present disclosure provides, the first cutting control is additionally provided on first branch's oil inlet oil circuit
Valve.First cutting control valve makes hydraulic oil not in a disconnected situation and can enter automatic leveling reversal valve.In this way, even if automatic
Leveling reversal valve there is clamping stagnation problem, self-leveling oil circuit can be also fully disconnected, avoid workbench always upwards or to
Lower movement, improves the safety of engineering machinery.
Pass through the detailed description referring to the drawings to the exemplary embodiment of the disclosure, the other feature of the disclosure, side
Face and its advantage will become apparent.
Detailed description of the invention
Attached drawing forms part of this specification, and which depict the exemplary embodiments of the disclosure, and together with specification
Together for explaining the principles of this disclosure, in the accompanying drawings:
Fig. 1 is the structural schematic diagram according to the hydraulic system of some embodiments of the disclosure；
Fig. 2 is the structural schematic diagram according to the control system of the disclosure other embodiments；
Fig. 3 is the flow diagram according to the control method of the other embodiment of the disclosure.
It should be understood that the size of various pieces shown in attached drawing is not to draw according to actual proportionate relationship.
In addition, same or similar reference label indicates same or similar component.
Specific embodiment
The various exemplary embodiments of the disclosure are described in detail now with reference to attached drawing.Description to exemplary embodiment
It is merely illustrative, never as to the disclosure and its application or any restrictions used.The disclosure can be with many differences
Form realize, be not limited to the embodiments described herein.These embodiments are provided so that the disclosure is thorough and complete, and
The scope of the present disclosure is given full expression to those skilled in the art.It should also be noted that unless specifically stated otherwise, otherwise in these implementations
Component described in example and positioned opposite, material component, numerical expression and the numerical value of step should be construed as merely and show
Example property, not as limitation.
" first ", " second " used in the disclosure and similar word are not offered as any sequence, quantity or again
The property wanted, and be used only to distinguish different parts.The similar word such as " comprising " or "comprising" means the element before the word
Cover the element enumerated after the word, it is not excluded that be also covered by the possibility of other element."upper", "lower" etc. are only used for indicating opposite
Positional relationship, after the absolute position for being described object changes, then the relative positional relationship may also correspondingly change.
In the disclosure, when being described to particular elements between the first component and second component, in the particular elements
May exist intervening elements between the first component or second component, intervening elements can also be not present.When being described to particular portion
When part connects other components, which can be directly connected to other components without intervening elements, can also be with
It is not directly connected to other components and there are intervening elements.
All terms (including technical term or scientific term) that the disclosure uses are common with disclosure fields
The meaning that technical staff understands is identical, unless otherwise specifically defined.It is also understood that in term such as defined in the general dictionary
The meaning consistent with their meanings in the context of the relevant technologies should be interpreted as having, without application idealization or
The meaning of extremely formalization explains, unless being clearly defined herein.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
Fig. 1 is the structural schematic diagram according to the hydraulic system of some embodiments of the disclosure.
As shown in Figure 1, hydraulic system may include leveling cyclinder 10, automatic leveling reversal valve 11 (such as servo valve), hand
Dynamic leveling reversal valve 12 and the first cutting control valve 13.
Leveling cyclinder 10 has rod chamber (chamber on right side) and rodless cavity (chamber in left side).Leveling cyclinder 10 is used for engineering
Mechanical workbench is leveled.For example, the cantilever crane of fire fighting truck includes principal arm, two arms and cranks arm, work for fire fighting truck
Make platform and connect with cranking arm, such as hingedly.
Automatic leveling reversal valve 11 includes the first actuator port A1, the second actuator port B1, the first oil return inlet T 1 and first
Oil inlet P 1.First actuator port A1 is connected to the rodless cavity of leveling cyclinder 10, the second actuator port B1 and leveling cyclinder 10
Rod chamber connection, the first oil inlet P 1 are connected to by first branch's oil inlet oil circuit 21 with main oil inlet oil circuit 20.By being adjusted to automatic
Flat reversal valve 11 is controlled, and the commutation of automatic leveling reversal valve 11 may be implemented, to change oil circuit in leveling cyclinder 10
Flow direction, to realize that the automatic leveling to workbench controls.
Manual leveling reversal valve 12 includes third actuator port A2, the 4th actuator port B2, the second oil return inlet T 2 and second
Oil inlet P 2.Third actuator port A2 is connected to the rodless cavity of leveling cyclinder 10, the 4th actuator port B2 and leveling cyclinder 10
Rod chamber connection, the second oil inlet P 2 are connected to by second branch's oil inlet oil circuit 22 with main oil inlet oil circuit 20.Manual leveling commutation
Valve 12 for example may include stopcock 122 under stopcock 121 and manual leveling in manual leveling.By to manual leveling reversal valve 11 into
Row control, for example, make in manual leveling under stopcock 121 and manual leveling stopcock 122 it is electric, can use and revolved in manual leveling
Stopcock 122 changes the flow direction of oil circuit in leveling cyclinder 10 under valve 121 or manual leveling, to realize the manual leveling to workbench
Control.
First cutting control valve 13 is arranged on first branch's oil inlet oil circuit 21.Here, the first cutting control valve 13 is non-
In the case where disconnection, the hydraulic oil of Lai Zizhu working oil path is able to enter automatic leveling reversal valve 11；And in a disconnected situation,
The hydraulic oil for carrying out autonomous working oil path not can enter automatic leveling reversal valve 11.
In above-described embodiment, the first cutting control valve 13 is additionally provided on first branch's oil inlet oil circuit 21.First cutting
Control valve 13 makes hydraulic oil not in a disconnected situation and can enter automatic leveling reversal valve 11.In this way, even if automatic leveling changes
There is clamping stagnation problem to valve 11, self-leveling oil circuit can be also fully disconnected, and avoid workbench always upward or downward
Movement, improves the safety of engineering machinery.
In some embodiments, the first actuator port A1 is connected to by balanced valve 14 with the rodless cavity of leveling cyclinder 10, the
Two actuator port B1 are connected to by balanced valve 14 with the rod chamber of leveling cyclinder 10.Balanced valve 14 can be to avoid from leveling cyclinder 10
Rod chamber or rodless cavity outflow hydraulic oil reflux, and can be to avoid the rod chamber or rodless cavity for flowing into leveling cyclinder 10
Hydraulic oil reflux, so as to more accurately be leveled to workbench.
First actuator port A1, the second actuator port B1, third actuator port A2 and the 4th actuator port B2 can pass through
Different modes is connected to leveling cyclinder 10.
In some embodiments, pass through the first working oil path 31 and leveling cyclinder 10 referring to Fig. 1, the first actuator port A1
Rodless cavity connection, the second actuator port B1 are connected to by the second working oil path 32 with the rod chamber of leveling cyclinder 10；Third work
Hydraulic fluid port A2 is connected to by third working oil path 33 with the first working oil path 31, and the 4th actuator port B2 passes through the 4th working oil path 34
It is connected to the second working oil path 32.In this case, third actuator port A2 is connected to the rodless cavity of leveling cyclinder 10 indirectly,
4th actuator port B2 is connected to the rod chamber of leveling cyclinder 10 indirectly.
The disclosure is not limited to upper type.For example, in further embodiments, third actuator port A2 can also be direct
Ground is connected to the rodless cavity of leveling cyclinder 10, and the 4th actuator port B2 can be directly connected to the rod chamber of leveling cyclinder 10.
In addition, balanced valve 14 can be set in the first working oil in the case where being provided with balanced valve 14 in hydraulic system
On road 31 and the second working oil path 32.
First oil return inlet T 1 and the second oil return inlet T 2 can be connected to fuel tank by different modes.
In some embodiments, referring to Fig. 1, the first oil return inlet T 1 passes through first branch's oil return circuit 41 and main oil return circuit
40 connections, the second oil return inlet T 2 are connected to by second branch's oil return circuit 42 with main oil return circuit 40.It should be understood that main oil return circuit
40 are connected to fuel tank.In this case, the first oil return inlet T 1 and the second oil return inlet T 2 may be coupled to same fuel tank.
The disclosure is not limited to upper type.For example, in further embodiments, the first oil return inlet T 1 and the second oil return opening
T2 also may be coupled to different fuel tanks.
In certain embodiments, hydraulic system further includes at least one in the second cutting control valve and third cutting control valve
A (not shown in figure 1).Second cutting control valve is arranged in the first working oil path 31, and third is cut off control valve and is arranged second
In working oil path 32.For example, first between the first actuator port A1 and balanced valve 14 can be set in the second cutting control valve
In working oil path 31, second working oil path between the second actuator port A2 and balanced valve 14 is can be set in third cutting control valve
On 32.It, can be in the case where one or all disconnection in the second cutting control valve and third stop valve under such mode
Ensure that self-leveling oil circuit can be fully disconnected, is moved upwardly or downwardly, further improves always to avoid workbench
The safety of engineering machinery.
Fig. 2 is the structural schematic diagram according to the control system of some embodiments of the disclosure.Control system is above-mentioned for controlling
The hydraulic system of any one embodiment.
As shown in Fig. 2, control system includes angular transducer 51, flame-out relay 52 and controller 53.Controller 53 divides
Not in angular transducer 51, flame-out relay 52 and Fig. 1 automatic leveling reversal valve 11, manual leveling reversal valve 12 and
First cutting control valve 13 is electrically connected.Controller 53 and angular transducer 51 may be coupled to power port, such as 24 volts of electricity
Source voltage port.
Tilt angle of the angular transducer 51 for the workbench of survey engineering machinery.Here tilt angle can manage
Solution is the angle between the surface and horizontal plane of workbench.
Flame-out relay 52 starts mechatronics with engineering machinery.
Controller 53 be used for tilt angle beyond preset range (such as the angle between horizontal plane be greater than 10 degree, example
As being tilted beyond 10 degree upwards or tilting down more than 10 degree) in the case where, it controls flame-out relay 52 and is powered so that engineering
Mechanical engine misses, and control automatic leveling reversal valve 11 and the first cutting power-off of control valve 13；In control automatic leveling
After reversal valve 11 and the first cutting control valve 13 power off, control manual leveling reversal valve 12 is powered.It should be understood that being adjusted manually in control
After flat reversal valve 12 is powered, user (such as fire fighter) can be with force start engine, and manual leveling commutation is manually operated
Valve is adjusted with the tilt angle to workbench.
In addition, controller 53 can control automatic leveling reversal valve 11 and the first cutting control after the completion of manual leveling
Valve 13 is powered, and is again introduced into automatic leveling mode.
Controller 53 can be realized in a manner of hardware, can also realize in the form of software.As with hardware
For mode come the example realized, controller 53 for example may include circuit board and relay.
In above-described embodiment, in the case where tilt angle exceeds preset range, controller controls automatic leveling reversal valve
11 and first cutting control valve 13 power off so that hydraulic oil not can enter automatic leveling reversal valve 11.In this way, even if certainly
There is clamping stagnation problem in dynamic leveling reversal valve 11, and self-leveling oil circuit can be also fully disconnected, avoid workbench always to
It above or moves downward, improves the safety of engineering machinery.
In some embodiments, in order to further increase the safety of engineering machinery, controller 53 is also used at inclination angle
Degree is cut off in control valve at least beyond the second cutting control valve and third in the case where preset range, controlled in hydraulic system
One power-off.Under such mode, in the case where the first cutting control valve 13 breaks down, remain to make self-leveling oil circuit
It is fully disconnected.
It can make the tilt angle of the workbench of engineering machinery by different modes within a preset range.It is situated between below
Continue two kinds of implementations.
In some implementations, referring to Fig. 1, control system can also include changing with angular transducer 51 and automatic leveling
The proportional amplifier 54 being electrically connected to valve 11.Proportional amplifier 54 is used for the tilt angle in workbench without departing from preset range
In the case where, control automatic leveling reversal valve 11 so that the tilt angle of workbench within a preset range.Correspondingly, it controls
Device 53 is used in the case where tilt angle is without departing from preset range, and the first cutting control valve 11 of control and proportional amplifier are powered
54.In addition, controller 53 can be also used in the case where the tilt angle of workbench is without departing from preset range, control is manual
It levels reversal valve 12 to power off, to avoid maloperation.
Angular transducer 52 is also used in the case where tilt angle is beyond preset range, sends switch letter to controller 53
Number.Correspondingly, controller 53 is powered for controlling flame-out relay 52 after receiving switching signal so that engineering machinery
Engine misses, and control the power-off of automatic leveling reversal valve 11.In addition, controller 53 controls the power-off of proportional amplifier 54 also to control
Automatic leveling reversal valve 11 processed powers off.
In some embodiments, angular transducer 52 can be obliquity sensor.Obliquity sensor can export two classes letter
Number, a kind of signal is the analog signal after the tilt angle conversion that will be measured, and another kind of signal is switching signal.
In other implementations, control system can not also include proportional amplifier 54.In such implementation,
Controller 53 can be used in the case where the tilt angle of workbench is without departing from preset range, control the first cutting control valve
11 be powered, and control automatic leveling reversal valve 11 so that the tilt angle of workbench within a preset range.
The embodiment of the present disclosure additionally provides a kind of engineering machinery, hydraulic system including any one above-mentioned embodiment and upper
State the control system of any one embodiment.In some embodiments, engineering machinery for example can be fire fighting truck, such as ascends a height and disappear
Anti- vehicle.
Fig. 3 is the flow diagram according to the control method of some embodiments of the disclosure.Control method is above-mentioned for controlling
The hydraulic system of any one embodiment.
In step 302, the tilt angle of the workbench of survey engineering machinery.For example, can use above-mentioned angle sensor
Device carrys out the tilt angle of the workbench of survey engineering machinery
In step 304, judge whether tilt angle is more than preset range.If so, thening follow the steps 306- step 308；If
It is no, then follow the steps 310.
In step 306, the engine misses of engineering machinery are controlled, and control automatic leveling reversal valve and the first cutting control
Valve power-off.
For example, can control flame-out relay power, to control the engine misses of engineering machinery.
In some embodiments, in the case where tilt angle exceeds preset range, the second cutting control can also be controlled
At least one of valve and third cutting control valve power-off, to further increase the safety of engineering machinery.
In step 308, after control automatic leveling reversal valve and the first cutting control valve power-off, control manual leveling commutation
Valve is powered.
After manual leveling reversal valve is powered, fire fighter can carry out manual leveling operation.
In step 310, control the first cutting control valve is powered, and controls automatic leveling reversal valve so that tilt angle exists
In preset range.
In above-described embodiment, in the case where tilt angle exceeds preset range, automatic leveling reversal valve and first is controlled
Cutting control valve powers off, so that hydraulic oil not can enter automatic leveling reversal valve.In this way, even if automatic leveling reversal valve
There is clamping stagnation problem, self-leveling oil circuit can be also fully disconnected, and workbench is avoided to be moved upwardly or downwardly always, be improved
The safety of engineering machinery.
So far, the presently disclosed embodiments is described in detail.In order to avoid covering the design of the disclosure, do not describe
Some details known in the field.Those skilled in the art as described above, completely it can be appreciated how implement here
Disclosed technical solution.
Although being described in detail by some specific embodiments of the example to the disclosure, the skill of this field
Art personnel it should be understood that above example merely to be illustrated, rather than in order to limit the scope of the present disclosure.The skill of this field
Art personnel it should be understood that can not depart from the scope of the present disclosure and spirit in the case where, modify to above embodiments or
Some technical features can be equivalently replaced.The scope of the present disclosure is defined by the following claims.
Claims (14)
1. a kind of hydraulic system, comprising:
Leveling cyclinder is leveled for the workbench to engineering machinery；
Automatic leveling reversal valve, comprising:
First actuator port is connected to the rodless cavity of the leveling cyclinder,
Second actuator port is connected to the rod chamber of the leveling cyclinder,
First oil return opening, and
First oil inlet passes through first branch's oil inlet oil circuit and main oil inlet oil communication；
Manual leveling reversal valve, comprising:
Third actuator port is connected to the rodless cavity of the leveling cyclinder,
4th actuator port is connected to the rod chamber of the leveling cyclinder,
Second oil return opening, and
Second oil inlet passes through second branch's oil inlet oil circuit and the main oil inlet oil communication；With
First cutting control valve, is arranged on the first branch oil inlet oil circuit.
2. hydraulic system according to claim 1, in which:
First actuator port is connected to by the first working oil path with the rodless cavity of the leveling cyclinder, second working oil
Mouth is connected to by the second working oil path with the rod chamber of the leveling cyclinder；
The third actuator port is connected to by third working oil path with first working oil path, and the 4th actuator port is logical
The 4th working oil path is crossed to be connected to second working oil path.
3. hydraulic system according to claim 2 further includes at least one of following:
Second cutting control valve, is arranged in first working oil path；
Third cuts off control valve, is arranged in second working oil path.
4. hydraulic system according to claim 2, further includes:
Balanced valve is arranged in first working oil path and second working oil path.
5. hydraulic system according to any one of claims 1-4, in which:
First oil return opening is connected to by first branch's oil return circuit with main oil return circuit, and second oil return opening passes through second
Branch's oil return circuit is connected to the main oil return circuit.
6. a kind of control system, for controlling the hydraulic system as described in claim 1-5 any one, the control system packet
It includes:
Angular transducer, for measuring the tilt angle of the workbench；
Flame-out relay starts mechatronics with the engineering machinery；With
Controller is changed with the angular transducer, the flame-out relay, the automatic leveling reversal valve, the manual leveling
To valve and the first cutting control valve electrical connection, for controlling in the case where the tilt angle exceeds the preset range
The flame-out relay power is made so that the engine misses, and controls the automatic leveling reversal valve and described first and cuts
Disconnected control valve power-off；After controlling the automatic leveling reversal valve and the first cutting control valve power-off, control described manual
Reversal valve is leveled to be powered.
7. control system according to claim 6, wherein the controller is also used in the tilt angle beyond described
In the case where preset range, the power-off of at least one of the second cutting control valve of control and third cutting control valve.
8. control system according to claim 6, further includes:
Proportional amplifier is electrically connected with the angular transducer and the automatic leveling reversal valve, in the tilt angle
In the case where without departing from the preset range, the automatic leveling reversal valve is controlled so that the tilt angle is described default
In range；
The angular transducer is also used in the case where the tilt angle is beyond the preset range, Xiang Suoshu controller hair
Send switching signal；
The controller is used in the case where the tilt angle is without departing from the preset range, controls the first cutting control
Valve processed and the proportional amplifier are powered；The flame-out relay power is controlled after receiving the switching signal so that institute
Engine misses are stated, and control the first cutting control valve power-off and to control proportional amplifier power-off described to control
The power-off of automatic leveling reversal valve.
9. control system according to claim 6, wherein the controller is also used in the tilt angle without departing from institute
In the case where stating preset range, control it is described first cutting control valve be powered, and control the automatic leveling reversal valve so that
The tilt angle is in the preset range.
10. a kind of engineering machinery, comprising:
Hydraulic system described in claim 1-5 any one；With
Control system described in claim 6-9 any one.
11. engineering machinery according to claim 10, wherein the engineering machinery includes fire fighting truck.
12. a kind of control method, for controlling hydraulic system described in claim 1-5 any one, the control method packet
It includes:
The tilt angle of the workbench of survey engineering machinery；
In the case where the tilt angle exceeds preset range, the engine misses of the engineering machinery are controlled, and control institute
State automatic leveling reversal valve and the first cutting control valve power-off；With
After controlling the automatic leveling reversal valve and the first cutting control valve power-off, the manual leveling reversal valve is controlled
It is powered.
13. control method according to claim 12, further includes:
In the case where the tilt angle exceeds the preset range, the second cutting control valve of control and third cut off control valve
At least one of power-off.
14. control method according to claim 12, further includes:
In the case where the tilt angle is without departing from the preset range, controls the first cutting control valve and be powered, and control
The automatic leveling reversal valve is made so that the tilt angle is in the preset range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910310714.5A CN109931304A (en) | 2019-04-18 | 2019-04-18 | Hydraulic system and its control system and method, engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910310714.5A CN109931304A (en) | 2019-04-18 | 2019-04-18 | Hydraulic system and its control system and method, engineering machinery |
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| CN109931304A true CN109931304A (en) | 2019-06-25 |
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| CN201910310714.5A Pending CN109931304A (en) | 2019-04-18 | 2019-04-18 | Hydraulic system and its control system and method, engineering machinery |
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| CN (1) | CN109931304A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030293A (en) * | 2010-12-10 | 2011-04-27 | 徐州重型机械有限公司 | Elevated operation vehicle and platform leveling hydraulic system thereof |
| CN202937011U (en) * | 2012-12-05 | 2013-05-15 | 中联重科股份有限公司 | Boom hydraulic system, boom system and concrete pumping equipment |
| US20130220110A1 (en) * | 2010-06-13 | 2013-08-29 | Zoomlion Heavy Industry Science And Technology Co., Ltd. | Vehicle body inclination-angle regulating uint, hydropneumatic suspension mechanism and mobile crane |
| CN103603841A (en) * | 2013-11-28 | 2014-02-26 | 长沙中联消防机械有限公司 | Leveling oil cylinder hydraulic control system and fire engine |
| CN103603836A (en) * | 2013-11-28 | 2014-02-26 | 长沙中联消防机械有限公司 | working bucket hydraulic control system and engineering vehicle |
| CN203948359U (en) * | 2014-06-27 | 2014-11-19 | 长沙中联消防机械有限公司 | Hydraulic system of engineering machinery and engineering machinery |
| CN105156380A (en) * | 2015-08-18 | 2015-12-16 | 北汽福田汽车股份有限公司 | Engineering machine leveling control device, system and method and engineering machine |
| CN107055418A (en) * | 2017-04-20 | 2017-08-18 | 湖南美奕机电科技有限公司 | A kind of high-altitude operation vehicle and its hydraulic leveling system |
| CN108278229A (en) * | 2018-03-19 | 2018-07-13 | 湖南星邦重工有限公司 | A kind of crank arm type high-altitude operation vehicle connector leveling hydraulic system |
| US20180319634A1 (en) * | 2014-10-30 | 2018-11-08 | Xuzhou Heavy Machinery Co., Ltd. | Crane hydraulic system and controlling method of the system |
| CN210033989U (en) * | 2019-04-18 | 2020-02-07 | 徐工消防安全装备有限公司 | Hydraulic system, control system thereof and engineering machinery |
-
2019
- 2019-04-18 CN CN201910310714.5A patent/CN109931304A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130220110A1 (en) * | 2010-06-13 | 2013-08-29 | Zoomlion Heavy Industry Science And Technology Co., Ltd. | Vehicle body inclination-angle regulating uint, hydropneumatic suspension mechanism and mobile crane |
| CN102030293A (en) * | 2010-12-10 | 2011-04-27 | 徐州重型机械有限公司 | Elevated operation vehicle and platform leveling hydraulic system thereof |
| CN202937011U (en) * | 2012-12-05 | 2013-05-15 | 中联重科股份有限公司 | Boom hydraulic system, boom system and concrete pumping equipment |
| CN103603841A (en) * | 2013-11-28 | 2014-02-26 | 长沙中联消防机械有限公司 | Leveling oil cylinder hydraulic control system and fire engine |
| CN103603836A (en) * | 2013-11-28 | 2014-02-26 | 长沙中联消防机械有限公司 | working bucket hydraulic control system and engineering vehicle |
| CN203948359U (en) * | 2014-06-27 | 2014-11-19 | 长沙中联消防机械有限公司 | Hydraulic system of engineering machinery and engineering machinery |
| US20180319634A1 (en) * | 2014-10-30 | 2018-11-08 | Xuzhou Heavy Machinery Co., Ltd. | Crane hydraulic system and controlling method of the system |
| CN105156380A (en) * | 2015-08-18 | 2015-12-16 | 北汽福田汽车股份有限公司 | Engineering machine leveling control device, system and method and engineering machine |
| CN107055418A (en) * | 2017-04-20 | 2017-08-18 | 湖南美奕机电科技有限公司 | A kind of high-altitude operation vehicle and its hydraulic leveling system |
| CN108278229A (en) * | 2018-03-19 | 2018-07-13 | 湖南星邦重工有限公司 | A kind of crank arm type high-altitude operation vehicle connector leveling hydraulic system |
| CN210033989U (en) * | 2019-04-18 | 2020-02-07 | 徐工消防安全装备有限公司 | Hydraulic system, control system thereof and engineering machinery |
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