CN108661111A - A kind of hydraulic control system and method - Google Patents
A kind of hydraulic control system and method Download PDFInfo
- Publication number
- CN108661111A CN108661111A CN201810681085.2A CN201810681085A CN108661111A CN 108661111 A CN108661111 A CN 108661111A CN 201810681085 A CN201810681085 A CN 201810681085A CN 108661111 A CN108661111 A CN 108661111A
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- China
- Prior art keywords
- hydraulic
- controller
- displaced position
- control
- guide oil
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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
-
- 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
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention provides a kind of hydraulic control system and methods, the system increases cylinder displacement sensor on the basis of excavator positive-flow hydraulic system, the displaced position of action tank can be monitored, in the case where displaced position is not in preset displacement position range, the output flow that controller controls hydraulic pressure main pump is zero.Once monitoring that action tank reaches the limit of position, so that it may which the flow to cut off liquid main pump in time exports, and avoids hydraulic pump from giving action tank fuel feeding with maximum stream flow, reduces energy expenditure.
Description
Technical field
The present invention relates to excavator hydraulic system development technique fields, more specifically to a kind of hydraulic control system
And method.
Background technology
During driver's practical operation excavator, being often used operation handle, to execute some dynamic to control excavator
Make, for example excavates handle control scraper bowl using scraper bowl and excavate.
But if the action tank of the action has arrived at extreme position, and driver is not in time by operation handle
Position in recurrence will make hydraulic fluid pressure in action tank increase and continue overflow rapidly, this is equivalent to hydraulic pressure main pump with most
Big flow is to action tank fuel feeding but not generates any useful work, to cause energy dissipation.
Invention content
To solve the above problems, the present invention provides a kind of hydraulic pump flow control method and device, technical solution is as follows：
A kind of hydraulic control system, including excavator positive-flow hydraulic system, the excavator positive-flow hydraulic system packet
Include operation handle, guide oil pressure sensor, hydraulic pressure main pump, hydraulic main valve, action tank and controller, the hydraulic control system
System further includes：The cylinder displacement sensor being set on the action tank, the cylinder displacement sensor and the controller
Communication connection；
The cylinder displacement sensor, the displaced position for monitoring the action tank, and institute's displacement position is sent out
It send to the controller；
The controller, for judging, whether displacement position allows in default within the scope of displaced position；If institute
For displacement position not within the scope of the default permission displaced position, the output flow for controlling the hydraulic pressure main pump is zero.
Preferably, the type of the hydraulic main valve is pilot-operated type or electronic control type.
Preferably, the controller, is additionally operable to：
The case where the type of the hydraulic main valve is electronic control type and the hydraulic main valve is communicated to connect with the controller
Under, if institute's displacement position not within the scope of the default permission displaced position, controls the liquid main valve and is in closing shape
State.
Preferably, the hydraulic control system further includes：It is set to the operation handle and the guide oil pressure sensing
Guide oil between device controls stop valve, and the guide oil control stop valve is communicated to connect with the controller；
The controller, if being additionally operable to institute's displacement position not within the scope of the default permission displaced position, control
The guide oil control stop valve is closed.
Preferably, the controller controls the hydraulic main valve corresponding with institute's displacement position or the guide oil
Control stop valve is closed.
Preferably, the guide oil control stop valve includes：Switch valve or proportioning valve.
Preferably, the controller, is additionally operable to：
The operating status of the cylinder displacement sensor is monitored, and normal condition is in the cylinder displacement sensor
In the case of, execution is described to judge whether institute's displacement position allows in default within the scope of displaced position.
Preferably, the controller, is additionally operable to：
If institute's displacement position is within the scope of the default permission displaced position, according to the guide oil pressure sensor
Transmitted guide oil pressure value calculates hydraulic pump flow value, and the output flow for controlling the hydraulic pressure main pump is the hydraulic pump
Flow value.
A kind of hydraulic control method, the control being applied in hydraulic control system described in above-mentioned technical proposal any one
Device processed, the hydraulic control method include：
Receive the displaced position transmitted by the cylinder displacement sensor；
Judge whether institute's displacement position allows in default within the scope of displaced position；
If institute's displacement position within the scope of the default permission displaced position, does not control the output of the hydraulic pressure main pump
Flow is zero.
Preferably, further include：
If institute's displacement position is within the scope of the default permission displaced position, according to the guide oil pressure sensor
Transmitted guide oil pressure value calculates hydraulic pump flow value, and the output flow for controlling the hydraulic pressure main pump is the hydraulic pump
Flow value.
Compared to the prior art, what the present invention realized has the beneficial effect that：
The above present invention provides a kind of hydraulic control system and method, base of the system in excavator positive-flow hydraulic system
Cylinder displacement sensor is increased on plinth, can monitor the displaced position of action tank, in displaced position not in preset displacement position
In the case of setting in range, the output flow that controller controls hydraulic pressure main pump is zero.Once monitoring that action tank reaches the limit of
Position, so that it may which the flow to cut off liquid main pump in time exports, and avoids hydraulic pump from giving action tank fuel feeding with maximum stream flow, reduces
Energy expenditure.
In addition, impact of the hydraulic oil to mechanical part can also be eliminated after the flow output of cut-out liquid main pump in time,
Reduce noise.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of excavator positive-flow hydraulic system；
Fig. 2 is the structural schematic diagram of hydraulic control system provided in an embodiment of the present invention；
Fig. 3 is another structural schematic diagram of hydraulic control system provided in an embodiment of the present invention；
Fig. 4 is the method flow diagram of hydraulic control method provided in an embodiment of the present invention；
Fig. 5 is the another method flow chart of hydraulic control method provided in an embodiment of the present invention；
Fig. 6 is the another method flow diagram of hydraulic control method provided in an embodiment of the present invention；
Fig. 7 is the another method flow chart of hydraulic control method provided in an embodiment of the present invention；
Fig. 8 is the another method flow chart of hydraulic control method provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Hydraulic main valve：The valve that the hydraulic oil that hydraulic pressure main pump pumps out is passed through to some action tank acted.The hydraulic pressure
The opening direction of main valve determines that the direction of motion of action tank, the aperture of hydraulic main valve determine that hydraulic oil reaches action tank
Speed, and then determine action execute speed.
Guide oil：Control the control hydraulic oil of hydraulic main valve aperture.The pressure of guide oil determines hydraulic main valve opening face
Product, and it is generally determined by the position of operation handle.
Fig. 1 is the structural schematic diagram of excavator positive-flow hydraulic system, and excavator positive-flow hydraulic system includes manipulator
Handle 10, guide oil pressure sensor 20, hydraulic pressure main pump 30, hydraulic main valve 40, action tank 50 and controller 60；Wherein, guide
Oil pressure force snesor 20 is used to monitor the pressure of guide oil in pilot control oil circuit, and when user uses operation handle, certain is all the way
Guide oil in pilot control oil circuit will send pressure change, and the opening of hydraulic main valve just corresponds to the road pilot control oil at this time
Road, and in the roads the aperture Ye Yugai pilot control oil circuit of hydraulic main valve guide oil pressure it is related.
The hydraulic control system that the present embodiment is provided, it is shown in Fig. 1 go out excavator positive-flow hydraulic system on the basis of,
Further include the cylinder displacement sensor 70 being set on action tank, cylinder displacement sensor is communicated to connect with controller, hydraulic pressure
The structural schematic diagram of system is as shown in Figure 2.
Cylinder displacement sensor 70, the displaced position for monitoring action tank, and displaced position is sent to controller.
Controller 60, for judging displaced position whether within the scope of default permission displaced position；If displaced position
Do not allow within the scope of displaced position default, the output flow of control hydraulic pressure main pump is zero.
In the present embodiment, the intermediate region of action tank both direction extreme position is default permission displaced position.Such as
Fruit displaced position does not allow default within the scope of displaced position, then it represents that action tank has arrived at the limit position of a direction
It sets, at this point, the output flow that controller directly controls hydraulic pressure main pump is zero.
And if displaced position allows default within the scope of displaced position, according to the elder generation transmitted by guide oil pressure sensor
Oil Guide pressure value calculates hydraulic pump flow value, and the output flow for controlling hydraulic pressure main pump is hydraulic pump flow value.And in controller
The process of hydraulic pump flow value is calculated, can be closed by corresponding between the guide's oil pressure and hydraulic pump flow that pre-establish
System, realizes calculating in a manner of looking into MAP tables.
At this stage, the excavator of prevalence is hydraulic main valve excavator in the market, i.e., above-mentioned control hydraulic main valve opening and side
It is controlled to by operation handle, the type of hydraulic main valve is pilot-operated type, and controller needs to detect guide's oil pressure to calculate hydraulic pump
Output flow.And the product trend of next-generation excavator is complete automatically controlled excavator, i.e. the also controlled device control of hydraulic main valve, liquid
It is electronic control type to press the type of main valve.
For the hydraulic main valve of electronic control type, to prevent due to gravity, the hydraulic oil in action tank is flow backwards, controller
60, it is additionally operable to：
In the case where the type of hydraulic main valve is electronic control type and hydraulic main valve is communicated to connect with controller, if bit shift
Setting does not allow default within the scope of displaced position, and control liquid main valve is closed.
For the hydraulic main valve of pilot-operated type, to prevent due to gravity, the hydraulic oil in action tank is flow backwards.In Fig. 2 institutes
Further include the guide being set between operation handle 10 and guide oil pressure sensor 20 on the basis of hydraulic control system is shown
Oil control stop valve 80, guide oil control stop valve 80 and are communicated to connect with controller 60, structural schematic diagram such as Fig. 3 of hydraulic system
It is shown.Controller 60, is additionally operable to：
If displaced position does not allow default within the scope of displaced position, control guide oil control stop valve, which is in, closes shape
State.
It should be noted that guide oil control stop valve can be switch valve, there can be switching function with proportioning valve
Valve, the present embodiment are not specifically limited this, can be selected according to actual needs.In addition, if guide oil controls
Stop valve is proportioning valve, then controller can control the closing velocity of guide oil control stop valve.
It should also be noted that, to ensure that system timely responds to the action request with oil cylinder opposite direction, controller control
Hydraulic main valve corresponding with displaced position or guide oil control stop valve are closed.
In some other embodiment, error control hydraulic pressure main pump the reason of to avoid cylinder displacement sensor failure,
In hydraulic control system shown by Fig. 2, controller is additionally operable to：
The operating status of cylinder displacement sensor is monitored, and the case where cylinder displacement sensor is in normal condition
Under, execution is described to judge whether displaced position allows in default within the scope of displaced position, the step for.
And the voltage, electric current that implement body can be based on cylinder displacement sensor or the displaced position fed back are controlled come really
It is normal or failure to determine cylinder displacement sensor, and the present embodiment does not limit this, can be selected according to actual needs.
Hydraulic control system provided in an embodiment of the present invention increases oil on the basis of excavator positive-flow hydraulic system
Cylinder displacement sensor can monitor the displaced position of action tank, in displaced position not feelings in preset displacement position range
Under condition, the output flow that controller controls hydraulic pressure main pump is zero.Once monitoring that action tank reaches the limit of position, so that it may and
When cut-out liquid main pump flow output, avoid hydraulic pump from giving action tank fuel feeding with maximum stream flow, reduce energy expenditure.
Based on the hydraulic control system that above-described embodiment provides, the embodiment of the present invention then provides a kind of hydraulic control method,
This method is applied to the controller in hydraulic control system, and method flow diagram such as Fig. 4 includes the following steps：
S10 receives the displaced position transmitted by cylinder displacement sensor.
S20, judges whether displaced position allows in default within the scope of displaced position；If displaced position is not permitted default
Perhaps within the scope of displaced position, S30 is thened follow the steps.
The output flow of S30, control hydraulic pressure main pump are zero.
In the present embodiment, the intermediate region of action tank both direction extreme position is default permission displaced position.Such as
Fruit displaced position does not allow default within the scope of displaced position, then it represents that action tank has arrived at the limit position of a direction
It sets, at this point, the output flow that controller directly controls hydraulic pressure main pump is zero.
For the normal use in the intermediate region of safety action oil cylinder both direction extreme position, it is shown in Fig. 4 go out hydraulic pressure
On the basis of control method, this method further includes following steps, and method flow diagram is as shown in Figure 5：
S40, if displaced position allows default within the scope of displaced position, transmitted by guide oil pressure sensor
Guide oil pressure value calculates hydraulic pump flow value, and the output flow for controlling hydraulic pressure main pump is hydraulic pump flow value.
At this stage, the excavator of prevalence is hydraulic main valve excavator in the market, i.e., above-mentioned control hydraulic main valve opening and side
It is controlled to by operation handle, the type of hydraulic main valve is pilot-operated type, and controller needs to detect guide's oil pressure to calculate hydraulic pump
Output flow.And the product trend of next-generation excavator is complete automatically controlled excavator, i.e. the also controlled device control of hydraulic main valve, liquid
It is electronic control type to press the type of main valve.
For the hydraulic main valve of electronic control type, to prevent due to gravity, the hydraulic oil in action tank is flow backwards, in Fig. 4 institutes
On the basis of showing hydraulic control method, this method further includes following steps, and method flow diagram is as shown in Figure 6：
S50, in the case where the type of hydraulic main valve is electronic control type and hydraulic main valve is communicated to connect with controller, if position
Pan position does not allow default within the scope of displaced position, and control liquid main valve is closed.
For the hydraulic main valve of pilot-operated type, to prevent due to gravity, the hydraulic oil in action tank is flow backwards.If hydraulic pressure
Control system includes that the guide oil being set between operation handle and guide oil pressure sensor controls stop valve, and guide oil
Stop valve 80 is controlled to communicate to connect with controller 60.Then it is shown in Fig. 4 go out hydraulic control method on the basis of, this method further includes
Following steps, method flow diagram are as shown in Figure 7：
S60, if displaced position does not allow default within the scope of displaced position, control guide oil control stop valve, which is in, to close
Closed state.
It should be noted that guide oil control stop valve can be switch valve, there can be switching function with proportioning valve
Valve, the present embodiment are not specifically limited this, can be selected according to actual needs.In addition, if guide oil controls
Stop valve is proportioning valve, then controller can control the closing velocity of guide oil control stop valve.
It should also be noted that, to ensure that system timely responds to the action request with oil cylinder opposite direction, controller control
Hydraulic main valve corresponding with displaced position or guide oil control stop valve are closed.
In some other embodiment, error control hydraulic pressure main pump the reason of to avoid cylinder displacement sensor failure.
On the basis of hydraulic control method shown by Fig. 4, this method further includes following steps, and method flow diagram is as shown in Figure 8：
S70 monitors the operating status of cylinder displacement sensor, and is in the feelings of normal condition in cylinder displacement sensor
Under condition, step S20 is executed.
And the voltage, electric current that implement body can be based on cylinder displacement sensor or the displaced position fed back are controlled come really
It is normal or failure to determine cylinder displacement sensor, and the present embodiment does not limit this, can be selected according to actual needs.
Hydraulic control method provided in an embodiment of the present invention can monitor the displaced position of action tank, in displaced position
In the case of not in preset displacement position range, the output flow that controller controls hydraulic pressure main pump is zero.Once monitoring to move
Position is reached the limit of as oil cylinder, so that it may which the flow to cut off liquid main pump in time exports, and avoids hydraulic pump with maximum stream flow to dynamic
Make oil cylinder fuel feeding, reduces energy expenditure.
A kind of hydraulic control system provided by the present invention and method are described in detail above, it is used herein
Principle and implementation of the present invention are described for specific case, and the explanation of above example is only intended to help to understand this
The method and its core concept of invention；Meanwhile for those of ordinary skill in the art, according to the thought of the present invention, specific
There will be changes in embodiment and application range, in conclusion the content of the present specification should not be construed as to the present invention's
Limitation.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment weight
Point explanation is all difference from other examples, and the same or similar parts between the embodiments can be referred to each other.
For the device disclosed in the embodiment, since it is corresponded to the methods disclosed in the examples, so fairly simple, the phase of description
Place is closed referring to method part illustration.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the element that the process, method, article or equipment including a series of elements is intrinsic,
Further include either the element intrinsic for these process, method, article or equipments.In the absence of more restrictions,
The element limited by sentence "including a ...", it is not excluded that in the process, method, article or equipment for including the element
In there is also other identical elements.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (10)
1. a kind of hydraulic control system, including excavator positive-flow hydraulic system, the excavator positive-flow hydraulic system include
Operation handle, guide oil pressure sensor, hydraulic pressure main pump, hydraulic main valve, action tank and controller, which is characterized in that described
Hydraulic control system further includes：The cylinder displacement sensor being set on the action tank, the cylinder displacement sensor with
The controller communication connection；
The cylinder displacement sensor, the displaced position for monitoring the action tank, and institute's displacement position is sent to
The controller；
The controller, for judging, whether displacement position allows in default within the scope of displaced position；If institute's rheme
For pan position not within the scope of the default permission displaced position, the output flow for controlling the hydraulic pressure main pump is zero.
2. system according to claim 1, which is characterized in that the type of the hydraulic main valve is pilot-operated type or automatically controlled
Type.
3. system according to claim 2, which is characterized in that the controller is additionally operable to：
In the case where the type of the hydraulic main valve is electronic control type and the hydraulic main valve is communicated to connect with the controller, such as
Fruit institute displacement position within the scope of the default permission displaced position, does not control the liquid main valve and is closed.
4. system according to claim 2, which is characterized in that the hydraulic control system further includes：It is set to the behaviour
Make the guide oil control stop valve between handle and the guide oil pressure sensor, guide oil control stop valve with it is described
Controller communicates to connect；
The controller, if being additionally operable to institute's displacement position not within the scope of the default permission displaced position, described in control
Guide oil control stop valve is closed.
5. system according to claim 3 or 4, which is characterized in that the controller control is opposite with institute's displacement position
The hydraulic main valve answered or guide oil control stop valve are closed.
6. system according to claim 4, which is characterized in that the guide oil controls stop valve and includes：Switch valve or
Proportioning valve.
7. system according to claim 1, which is characterized in that the controller is additionally operable to：
The operating status of the cylinder displacement sensor is monitored, and the feelings of normal condition are in the cylinder displacement sensor
Under condition, execution is described to judge whether institute's displacement position allows in default within the scope of displaced position.
8. system according to claim 1, which is characterized in that the controller is additionally operable to：
If institute's displacement position is sent out within the scope of the default permission displaced position according to the guide oil pressure sensor
The guide oil pressure value sent calculates hydraulic pump flow value, and the output flow for controlling the hydraulic pressure main pump is the hydraulic pump flow
Value.
9. a kind of hydraulic control method, which is characterized in that be applied to hydraulic control system described in claim 1~8 any one
In the controller, the hydraulic control method includes：
Receive the displaced position transmitted by the cylinder displacement sensor；
Judge whether institute's displacement position allows in default within the scope of displaced position；
If institute's displacement position within the scope of the default permission displaced position, does not control the output flow of the hydraulic pressure main pump
It is zero.
10. according to the method described in claim 9, it is characterized in that, further including：
If institute's displacement position is sent out within the scope of the default permission displaced position according to the guide oil pressure sensor
The guide oil pressure value sent calculates hydraulic pump flow value, and the output flow for controlling the hydraulic pressure main pump is the hydraulic pump flow
Value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810681085.2A CN108661111A (en) | 2018-06-27 | 2018-06-27 | A kind of hydraulic control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810681085.2A CN108661111A (en) | 2018-06-27 | 2018-06-27 | A kind of hydraulic control system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108661111A true CN108661111A (en) | 2018-10-16 |
Family
ID=63773371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810681085.2A Pending CN108661111A (en) | 2018-06-27 | 2018-06-27 | A kind of hydraulic control system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108661111A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331757A (en) * | 2019-07-18 | 2019-10-15 | 江苏徐工工程机械研究院有限公司 | Loading shovel lifts control method, system and controller |
| CN111042260A (en) * | 2019-12-18 | 2020-04-21 | 广西柳工机械股份有限公司 | System and method for controlling lifting of movable arm of loader |
| CN111691493A (en) * | 2020-07-16 | 2020-09-22 | 三一重机有限公司 | Hydraulic oil cylinder monitoring device, excavator and method |
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Application publication date: 20181016 |