CN106516986B - Hydraulic control equipment, method and system for lowering speed of crane winch and crane - Google Patents
Hydraulic control equipment, method and system for lowering speed of crane winch and crane Download PDFInfo
- Publication number
- CN106516986B CN106516986B CN201611154022.9A CN201611154022A CN106516986B CN 106516986 B CN106516986 B CN 106516986B CN 201611154022 A CN201611154022 A CN 201611154022A CN 106516986 B CN106516986 B CN 106516986B
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- load
- crane
- oil pressure
- pressure relief
- control
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000012530 fluid Substances 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 45
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
- B66C13/14—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices to load-engaging elements or motors associated therewith
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control And Safety Of Cranes (AREA)
- Elevator Control (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The invention discloses a hydraulic control device, a method and a system for lowering speed of a crane winch and a crane, wherein the hydraulic control device comprises: the receiving device is used for receiving the hook load of the crane and the opening degree of the electric control handle; and control means for performing the following operations: calculating the single-rope load of the winch according to the hook load; determining the opening of a main valve for controlling the flow of hydraulic oil to a winding motor according to the single rope load and the opening of the electric control handle; and controlling the main valve to the determined opening degree. Through the scheme, the contradiction between the working efficiency of the crane under the no-load or light-load working condition and the safety of the crane under the heavy-load working condition can be solved, on one hand, the running speed of the crane under the no-load or light-load working condition is ensured, and on the other hand, the lowering speed of the crane under the heavy-load working condition is ensured to be safe and controllable.
Description
Technical field
The present invention relates to engineering machinery field, and in particular, to a kind of crane hoisting lowering velocity hydraulic-pressure control apparatus,
Method, system and crane.
Background technology
The working condition requirement of crane hoisting is very stringent, often requires that possess very high operating rate in unloaded and light duty
And efficiency, while require possess low speed and high security in severe duty again.Height of the crane hoisting under severe duty
Speed movement easily causes security incident, and the hydraulic control of current crane is generally adopted to preferentially meet the needs of security
With Load sensing hydraulic+balanced valve control principle.
Fig. 1 shows the existing crane hoisting lowering velocity liquid using Load sensing hydraulic+balanced valve control principle
The structure diagram of pressure control system.As shown in Figure 1, the hydraulic oil of main pump 1 enters main valve 2 through P hydraulic fluid ports, and flowed via main valve 2
Enter hoist motor 4 and then drive the hoist motor 4 to move, the oil return of the hoist motor 4 is back to fuel tank through balanced valve 3, safety
Valve 5 can control the pressure of main pump 1 according to the load pressure that the LS mouths of main valve are fed back.Operator can be by operating electric control handle
The valve port opening and output flow of main valve 2 are directly controlled, and then controls the rotary speed and weight lowering velocity of hoist motor 4,
But in order to preferentially meet heavy-duty safety demand, often the aperture of the valve port flow of elevator decentralization and balanced valve is limited
System, causes the maximal rate that elevator is transferred relatively low, causes the work efficiency under unloaded and light duty relatively low.That is, it is
Preferential to meet the needs of heavy-duty safety, the elevator decentralization hydraulic control system of existing autocrane often sacrifices zero load
With underloading work efficiency and speed, make operation time long, cause the work efficiency under unloaded and light duty relatively low.
The content of the invention
The object of the present invention is to provide a kind of crane hoisting lowering velocity hydraulic-pressure control apparatus, method, system and lifting
Machine, it can solve the contradiction between the security under work efficiency and severe duty under the zero load of crane or light duty,
On the one hand ensure the speed of service under unloaded or light duty, on the other hand ensure that the lowering velocity under severe duty safely may be used
Control.
To achieve these goals, one embodiment of the invention provides a kind of crane hoisting lowering velocity hydraulic control and sets
Standby, which includes：Reception device, for receiving the hook load and electric control handle aperture of the crane；And control
Device, for performing following operation：According to the hook load, single rope load of the elevator is calculated；Carried according to single rope
Lotus and the electric control handle aperture, determine control to the aperture of the main valve of the hydraulic fluid flow rate of hoist motor；And described in control
Main valve is to identified aperture.
Optionally, in the case where the electric control handle aperture is certain, single rope load is bigger, the aperture of the main valve
It is smaller.
Optionally, the control device is always according to single rope load, elder generation of the control on elevator decentralization pressure oil circuit
The oil pressure relief of conduction proportional pressure control valve, so that in the case of load is less, the oil pressure relief is higher, larger in load
In the case of, the oil pressure relief is smaller.
Optionally, the control device is additionally operable to according to the oil pressure relief, and control is positioned at elevator decentralization pressure oil
The oil pressure relief of safety valve on road so that the oil pressure relief of the safety valve is more than the overflow pressure of the pilot-operated proportional relief valve
Power.
Optionally, the oil pressure relief of the safety valve is more than the oil pressure relief 1-2MPa of the pilot-operated proportional relief valve.
Correspondingly, one embodiment of the invention also provides a kind of crane hoisting lowering velocity hydraulic control method, this method
Including：Receive the hook load and electric control handle aperture of the crane；And according to the hook load, calculate the volume
The single rope load raised；According to single restrict load and the electric control handle aperture, determine control to the hydraulic pressure oil stream of hoist motor
The aperture of the main valve of amount；And the main valve is controlled to identified aperture.
Optionally, in the case where the electric control handle aperture is certain, single rope load is bigger, the aperture of the main valve
It is smaller.
Optionally, this method further includes：According to single load of restricting, guide of the control on elevator decentralization pressure oil circuit
The oil pressure relief of formula proportional pressure control valve, so that in the case of load is less, the oil pressure relief is higher, larger in load
In the case of, the oil pressure relief is smaller.
Optionally, this method further includes：According to the oil pressure relief, control is on elevator decentralization pressure oil circuit
The oil pressure relief of safety valve so that the oil pressure relief of the safety valve is more than the oil pressure relief of the pilot-operated proportional relief valve.
Optionally, the oil pressure relief of the safety valve is more than the oil pressure relief 1-2MPa of the pilot-operated proportional relief valve.
Correspondingly, one embodiment of the invention also provides a kind of crane hoisting lowering velocity hydraulic control system, the system
Comprising：Moment measuring device, for detecting the hook load of the crane；Electric control handle, for exporting and user's operation phase
The corresponding signal for representing electric control handle aperture；And above-mentioned crane hoisting lowering velocity hydraulic-pressure control apparatus.
Correspondingly, one embodiment of the invention also provides a kind of crane, which transfers comprising above-mentioned crane hoisting
Speed hydraulic control system.
Through the above technical solutions, control device according to the hook load, can calculate single rope load of the elevator, and
According to single restrict load and the electric control handle aperture, the aperture of control bound, so as to may be such that elevator lowering velocity can root
It is changed according to the zero load or severe duty of crane, on the one hand ensures the speed of service under unloaded or light duty, the opposing party
Face ensures that the lowering velocity under severe duty is safely controllable.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Attached drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 shows the existing crane hoisting lowering velocity liquid using Load sensing hydraulic+balanced valve control principle
The structure diagram of pressure control system；
Fig. 2 is the block diagram for the crane hoisting lowering velocity hydraulic control system that one embodiment of the invention provides；
Fig. 3 is the structure diagram for the crane hoisting lowering velocity hydraulic control system that one embodiment of the invention provides；
And
Fig. 4 is the flow chart for the crane hoisting lowering velocity hydraulic control method that one embodiment of the invention provides.
Description of reference numerals
1 main pump, 2 main valve
3 hoist motor, 4 balanced valve
5 safety valve, 6 guide proportion overflow valve
10 moment measuring device, 20 electric control handle
110 reception device, 120 control device
100 crane hoisting lowering velocity hydraulic-pressure control apparatus
Embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Fig. 2 is the block diagram for the crane hoisting lowering velocity hydraulic control system that one embodiment of the invention provides.Such as Fig. 2 institutes
Show, one embodiment of the invention provides a kind of crane hoisting lowering velocity hydraulic control system, which includes：Moment inspecting
Device 10, for detecting the hook load of the crane；Electric control handle 20, for exporting and the corresponding expression of user's operation
The signal of electric control handle aperture；And crane hoisting lowering velocity hydraulic-pressure control apparatus 100, the crane hoisting lowering velocity
Hydraulic-pressure control apparatus 100 includes：Reception device 110, for receiving the hook load and electric control handle aperture of the crane；
And control device 120, for performing following operation：According to the hook load, single rope load of the elevator is calculated；According to
Single rope load and the electric control handle aperture, determine control to the aperture of the main valve of the hydraulic fluid flow rate of hoist motor；With
And the main valve is controlled to identified aperture.
Specifically, the moment measuring device can be the limiter of moment on crane, and the control device 120 can root
The hook load (for example, load weight) that is detected according to the limiter of moment and the steel wire rope multiplying power for combining the crane hoisting,
Single rope load is calculated, which can be 0-Mmax (t).Electric control handle is operated in operator to be rolled up
When raising decentralization, the signal of the exportable reflection electric control handle aperture of the electric control handle is wished to the control device 120 in operator
When hoping that elevator lowering velocity is very fast, it may be such that the aperture of electric control handle is larger；When operator wishes that elevator lowering velocity is slower
When, it may be such that the aperture of electric control handle is smaller.
For the control device after single rope load and the electric control handle aperture is received, it can be according to depositing in advance
The operation control proportional curve of storage exports corresponding control signal to main valve, to control the aperture of the main valve.Specifically, it is described
Operation control proportional curve can represent the correspondence between electric control handle aperture, single rope load and main valve aperture three, its institute
Reflection is that single rope load is bigger, and main valve aperture is smaller, i.e., control device is inputted to the control signal of main valve and not merely simply examined
Electric control handle aperture is considered, it is also contemplated that single rope load condition, in the case where singly rope load is larger, may be such that input to main valve
The intensity of control signal inputted compared to only electric control handle aperture is considered to the intensity of the control signal of main valve
It is smaller, singly rope load it is smaller or in the case of unloaded, may be such that input to the control signal of main valve intensity compared to
Only the intensity for considering electric control handle aperture and inputting to the control signal of main valve is bigger.Input to the control of main valve and believe
Number intensity it is smaller, the aperture of the main valve is smaller, smaller by the hydraulic fluid flow rate of hoist motor, and elevator lowering velocity is slower；
Input is bigger to the intensity of the control signal of main valve, and the aperture of the main valve is bigger, bigger by the hydraulic fluid flow rate of hoist motor,
Elevator lowering velocity is faster.Elevator lowering velocity can be changed according to the zero load or severe duty of crane, and can be according to upper
State the electrodeless change that operation control proportional curve realizes elevator lowering velocity.
Fig. 3 is the structure diagram for the crane hoisting lowering velocity hydraulic control system that one embodiment of the invention provides.
As shown in figure 3, the hydraulic oil of main pump 1 enters main valve 2 through P hydraulic fluid ports, and flow into hoist motor 4 via main valve 2 and then drive the volume
Raise motor 4 to move, the oil return of the hoist motor 4 is back to fuel tank through balanced valve 3, and safety valve 5 can be anti-according to the LS mouths institute of main valve
The load pressure of feedback controls the pressure of main pump 1.Operator can directly control the valve port opening of main valve 2 by operating electric control handle
And output flow, and then control the rotary speed and weight lowering velocity of hoist motor 4.With the crane shown in existing Fig. 1
The structure of elevator lowering velocity hydraulic control system is different, the crane hoisting lowering velocity hydraulic control system shown in the Fig. 3
Pilot-operated proportional relief valve 6 is also included, its controllable elevator declines the pressure of chamber and balanced valve pilot port.The pilot proportional overflows
Stream valve may act as the function of secondary overflow valve, can basis after control device detection identifies single rope load of hoisting rope
The oil pressure relief of unloaded, underloading and heavy duty control pilot-operated proportional relief valve, and then control the maximum opening of balanced valve.
In idle condition, control device can set the oil pressure relief of the guide proportion overflow valve, make it higher, main valve
Flow is completely used for the decentralization campaign of hoist motor, and elevator decentralization is in decentralization state at full speed so that lowering velocity quickly, works
It is efficient.In severe duty, control device can set the oil pressure relief of the guide proportion overflow valve, make its relatively low, under elevator
Put and be in relatively low speed state, while caused by low oil pressure relief can filter the shake of the small opening stage of heavy-load lowering well
Pressure oscillation, lifts the speed stability of severe duty well.
Preferably, the control device can be also controlled positioned at elevator decentralization pressure oil circuit according to the oil pressure relief
On safety valve oil pressure relief so that the oil pressure relief of the safety valve be more than the pilot-operated proportional relief valve overflow pressure
Power, for example, the oil pressure relief of the safety valve can be more than the oil pressure relief 1-2MPa of the pilot-operated proportional relief valve.Thereby, exist
When guide proportion overflow valve fails because being stuck in enormous pressure value, the pressure of elevator decentralization intracavitary can be very high, causes lowering velocity
Hypervelocity, safety valve is actionable at this time, it is ensured that severe duty lowering velocity it is stably and controllable and safe.
Fig. 4 is the flow chart for the crane hoisting lowering velocity hydraulic control method that one embodiment of the invention provides.Such as Fig. 4
Shown, correspondingly, one embodiment of the invention also provides a kind of crane hoisting lowering velocity hydraulic control method, this method bag
Include：Receive the hook load and electric control handle aperture of the crane；And according to the hook load, calculate the elevator
Single rope load；According to single restrict load and the electric control handle aperture, determine control to the hydraulic fluid flow rate of hoist motor
Main valve aperture；And the main valve is controlled to identified aperture.
Wherein, in the case where the electric control handle aperture is certain, single rope load is bigger, and the aperture of the main valve is got over
It is small.
Wherein, this method further includes：According to single load of restricting, pilot-operated type of the control on elevator decentralization pressure oil circuit
The oil pressure relief of proportional pressure control valve, so that in the case of load is less, the oil pressure relief is higher, in the feelings that load is larger
Under condition, the oil pressure relief is smaller.
Wherein, this method further includes：According to the oil pressure relief, peace of the control on elevator decentralization pressure oil circuit
The oil pressure relief of full valve so that the oil pressure relief of the safety valve is more than the oil pressure relief of the pilot-operated proportional relief valve.
Wherein, the oil pressure relief of the safety valve is more than the oil pressure relief 1-2MPa of the pilot-operated proportional relief valve.
The detail and benefit of the crane hoisting lowering velocity hydraulic control method provided in relation to the embodiment, can join
The description of the above-mentioned crane hoisting lowering velocity hydraulic control system provided for embodiment is provided, is repeated no more in this.
Correspondingly, a kind of crane of the offer of the invention, the crane include above-mentioned crane hoisting lowering velocity hydraulic pressure
Control system.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (12)
1. a kind of crane hoisting lowering velocity hydraulic-pressure control apparatus, it is characterised in that the equipment includes：
Reception device, for receiving the hook load and electric control handle aperture of the crane；And
Control device, for performing following operation：
According to the hook load, single rope load of the elevator is calculated；
According to single restrict load and the electric control handle aperture, determine to control to the main valve of the hydraulic fluid flow rate of hoist motor
Aperture；And
The main valve is controlled to identified aperture.
2. crane hoisting lowering velocity hydraulic-pressure control apparatus according to claim 1, it is characterised in that described automatically controlled
In the case that handle aperture is certain, single rope load is bigger, and the aperture of the main valve is smaller.
3. crane hoisting lowering velocity hydraulic-pressure control apparatus according to claim 1 or 2, it is characterised in that the control
Device processed is always according to single rope load, the overflow pressure of pilot-operated proportional relief valve of the control on elevator decentralization pressure oil circuit
Power, so that in the case of load is less, the oil pressure relief is higher, in the case where load is larger, the oil pressure relief
It is smaller.
4. crane hoisting lowering velocity hydraulic-pressure control apparatus according to claim 3, it is characterised in that the control dress
Put and be additionally operable to according to the oil pressure relief, the oil pressure relief of safety valve of the control on elevator decentralization pressure oil circuit, makes
The oil pressure relief for obtaining the safety valve is more than the oil pressure relief of the pilot-operated proportional relief valve.
5. crane hoisting lowering velocity hydraulic-pressure control apparatus according to claim 4, it is characterised in that the safety valve
Oil pressure relief is more than the oil pressure relief 1-2MPa of the pilot-operated proportional relief valve.
6. a kind of crane hoisting lowering velocity hydraulic control method, it is characterised in that this method includes：
Receive the hook load and electric control handle aperture of the crane；And
According to the hook load, single rope load of the elevator is calculated；
According to single restrict load and the electric control handle aperture, determine to control to the main valve of the hydraulic fluid flow rate of hoist motor
Aperture；And
The main valve is controlled to identified aperture.
7. crane hoisting lowering velocity hydraulic control method according to claim 6, it is characterised in that described automatically controlled
In the case that handle aperture is certain, single rope load is bigger, and the aperture of the main valve is smaller.
8. the crane hoisting lowering velocity hydraulic control method according to claim 6 or 7, it is characterised in that this method
Further include：
According to single load of restricting, the oil pressure relief of the pilot-operated proportional relief valve on pressure oil circuit is transferred in control positioned at elevator,
So that in the case of load is less, the oil pressure relief is higher, in the case where load is larger, the oil pressure relief compared with
It is small.
9. crane hoisting lowering velocity hydraulic control method according to claim 8, it is characterised in that this method is also wrapped
Include：
According to the oil pressure relief, the oil pressure relief of safety valve of the control on elevator decentralization pressure oil circuit so that should
The oil pressure relief of safety valve is more than the oil pressure relief of the pilot-operated proportional relief valve.
10. crane hoisting lowering velocity hydraulic control method according to claim 9, it is characterised in that the safety valve
Oil pressure relief be more than the pilot-operated proportional relief valve oil pressure relief 1-2MPa.
11. a kind of crane hoisting lowering velocity hydraulic control system, it is characterised in that the system includes：
Moment measuring device, for detecting the hook load of the crane；
Electric control handle, for exporting and the corresponding signal for representing electric control handle aperture of user's operation；And
Crane hoisting lowering velocity hydraulic-pressure control apparatus according to any one of claim 1-5 claim.
12. a kind of crane, it is characterised in that the crane includes crane hoisting according to claim 11 decentralization speed
Spend hydraulic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154022.9A CN106516986B (en) | 2016-12-14 | 2016-12-14 | Hydraulic control equipment, method and system for lowering speed of crane winch and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154022.9A CN106516986B (en) | 2016-12-14 | 2016-12-14 | Hydraulic control equipment, method and system for lowering speed of crane winch and crane |
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| Publication Number | Publication Date |
|---|---|
| CN106516986A CN106516986A (en) | 2017-03-22 |
| CN106516986B true CN106516986B (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611154022.9A Active CN106516986B (en) | 2016-12-14 | 2016-12-14 | Hydraulic control equipment, method and system for lowering speed of crane winch and crane |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113023612B (en) * | 2021-04-01 | 2022-03-01 | 中联重科股份有限公司 | Equipment parking method and device, crane, electronic equipment and readable medium |
| CN114180478B (en) * | 2021-11-09 | 2023-02-07 | 中联重科股份有限公司 | Method, processor and device for hoisting mechanism, hoisting mechanism and crane |
| CN116281620A (en) * | 2023-01-31 | 2023-06-23 | 三一汽车起重机械有限公司 | Speed control method of hoisting system, hoisting system and crane |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527536A (en) * | 2013-10-22 | 2014-01-22 | 中联重科股份有限公司 | Hydraulic motor speed regulating system and speed regulating method and hoisting equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0717688A (en) * | 1993-07-05 | 1995-01-20 | Kobe Steel Ltd | Drive control device for hydraulic winch |
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2016
- 2016-12-14 CN CN201611154022.9A patent/CN106516986B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527536A (en) * | 2013-10-22 | 2014-01-22 | 中联重科股份有限公司 | Hydraulic motor speed regulating system and speed regulating method and hoisting equipment |
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