CN105967077B - A kind of luffing control system and its control method - Google Patents
A kind of luffing control system and its control method Download PDFInfo
- Publication number
- CN105967077B CN105967077B CN201610566616.4A CN201610566616A CN105967077B CN 105967077 B CN105967077 B CN 105967077B CN 201610566616 A CN201610566616 A CN 201610566616A CN 105967077 B CN105967077 B CN 105967077B
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- China
- Prior art keywords
- luffing
- control
- pressure sensor
- control device
- pressure
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/82—Luffing gear
-
- 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
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
Abstract
The invention discloses a kind of luffing control system, including：Amplitude oil cylinder, luffing handle, hydraulic oil container, enclosed variable pump, main valve, luffing control valve, control device, first pressure sensor, second pressure sensor, the big chamber of the amplitude oil cylinder is connected with luffing control valve, it is connected between the A1 mouths of luffing control valve and enclosed variable pump hydraulic fluid port A by main valve, the small chamber of amplitude oil cylinder is connected with hydraulic oil container；Control device is received after handle signal, by detecting the live signal of first pressure sensor and second pressure sensor, by default control strategy, realizes the control to luffing control valve, main valve and enclosed variable pump.Ensure the secure ratcs of amplitude oil cylinder by luffing control valve, detect the pressure at A1 mouthfuls of the big chamber of amplitude oil cylinder and luffing control valve in real time by pressure sensor, luffing whereabouts security strategy is set by control device, it is ensured that luffing is steadily reliable.
Description
Technical field
The present invention relates to a kind of luffing control system and its control method, belong to crane amplitude variation systems technology field.
Background technology
Currently, crane amplitude variation raising is mainly using open type variable pump or proportional reversing valve control speed, and luffing falls to leading
Throttle grverning is used, luffing falling speed is controlled by changing balanced valve openings of sizes.
Crane amplitude variation is to promote crane arm to be rotated around rear hinge by amplitude oil cylinder, arm itself when unloaded luffing falls
Gravitational force urges derricking cylinder bounces back, when luffing with payload falls, and amplitude oil cylinder retraction is promoted in the presence of arm and weight, in order to protect
Card luffing dropping process is safe and reliable and derricking speed is controllable, generally fills a balanced valve in the big chamber of derricking cylinder, passes through the balanced valve
Realize the holding and control of load.The speed that luffing falls is determined by balanced valve openings of sizes, by producing pressure before and after balanced valve
Power difference balances the load.Because hoister in large tonnage boom weight is up to tens tons, weight reaches potential energy in tons up to a hundred, dropping process
A large amount of heat energy are converted to, hydraulic system temperature is raised.Though can be well for current valve control or pump control load sensitive system
It is that outer load is promoted that matched load pressure and flow, pressure and flow needed for only being provided to system, but crane amplitude variation, which fall,
Derricking cylinder bounces back, it is necessary to absorbing load potential energy.
In the system that closed model pump control luffing falls, the pressure oil for the big chamber of balanced loaded amplitude oil cylinder is by closing
Formula variable is pumped back to fuel tank, it is possible to use hydraulic energy transfer is mechanical energy by the method for energy oil return.But falling to starting moment,
Easily there is amplitude oil cylinder to glide, impact, especially when luffing with payload falls, strong impact has had a strong impact on crane
Safety.
The content of the invention
Purpose：In order to overcome the deficiencies in the prior art, the present invention provides a kind of luffing control system and its control
Method.
Technical scheme：In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of luffing control system, including：Amplitude oil cylinder, luffing handle, hydraulic oil container, enclosed variable pump, main valve, luffing
Control valve, control device, first pressure sensor, second pressure sensor, big chamber and the luffing control valve of the amplitude oil cylinder
It is connected, is connected between the A1 mouths and enclosed variable pump hydraulic fluid port A of luffing control valve by main valve, the small chamber and liquid of amplitude oil cylinder
Force feed case is connected；The first pressure sensor is used to measure pressure at the A1 mouths of luffing control valve, and the second pressure is passed
Sensor is used for the big cavity pressure for measuring amplitude oil cylinder；The control device respectively with luffing handle, luffing control valve, main valve, close
Formula variable pump, first pressure sensor, second pressure sensor are connected；The pressure value of the first pressure sensor collection
S1, the pressure value S2 of second pressure sensor collection are sent to control device；The luffing handle working signal is sent to control
Device processed；The control device is used to be turned on and off luffing control valve, main valve, opens the forward or reverse of enclosed variable pump.
A kind of control method of luffing control system, comprises the following steps：
Step one：When luffing handle luffing falling signal input control device, control device sends rotating forward to enclosed variable pump
Signal, while opening main valve；
Step 2：Control device gathers pressure value S1, pressure value S2 respectively, when pressure value S1 reaches preset value S1 ', control
Device processed opens luffing control valve, and reverse signal is sent to enclosed variable pump；Preset value S1 ' the values of the pressure value S1 are such as
Under：When pressure value S2 is in 0-100bar, S1 '=S2 × α1, 0.6≤α1≤0.65；When pressure value S2 is in 100-200bar, S1 '=
S2×α2, 0.7≤α2≤0.75；When pressure value S2 is in 200-300bar, S1 '=S2 × α3, 0.8≤α3<0.85；Work as pressure value
S2 is in more than 300bar, S1 '=S2 × α4, 0.85≤α4≤0.9。
Preferably, the α1=0.6, α2=0.7, α3=0.8, α4=0.85.
Beneficial effect：A kind of luffing control system and its control method that the present invention is provided, using enclosed variable pump to becoming
Width falls to being controlled, and ensures the secure ratcs of amplitude oil cylinder by luffing control valve, passes through first pressure sensor, the second pressure
Force snesor detects the pressure at A1 mouthfuls of the big intracavitary of amplitude oil cylinder and luffing control valve oil inlet in real time, is set by control device
Luffing whereabouts security strategy, it is ensured that luffing is steadily reliable.
Advantages of the present invention is as follows：
1. luffing fall when first for enclosed variable pump to the oil circuit fuel feeding between luffing control valve, can quickly set up luffing
System pressure.
2. when pressure value reaches the pressure percent value of setting, luffing falls.
3. luffing control valve leakage rate is almost nil, it is ensured that the secure ratcs of derricking cylinder.
4. luffing dropping process can using energy regenerating method by hydraulic energy transfer be mechanical energy.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is control device connection diagram of the present invention.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, a kind of luffing control system, including：Amplitude oil cylinder 1, luffing handle 2, hydraulic oil container 3, close
Formula variable pump 4, main valve 5, luffing control valve 6, control device 7, first pressure sensor 8, second pressure sensor 9, it is described to become
The big chamber of width oil cylinder 1 is connected with luffing control valve 6, passes through between the A1 mouths and the hydraulic fluid port A of enclosed variable pump 4 of luffing control valve 6
Main valve 5 is connected, and the small chamber of amplitude oil cylinder 1 is connected with hydraulic oil container 3；The first pressure sensor 8 is used to measure luffing
Pressure at the A1 mouths of control valve 6, the second pressure sensor 9 is used for the big cavity pressure for measuring amplitude oil cylinder 1；The control dress
7 are put to sense with luffing handle 2, luffing control valve 6, main valve 5, enclosed variable pump 4, first pressure sensor 8, second pressure respectively
Device 9 is connected；Pressure value S1, the pressure value S2 of the collection of second pressure sensor 9 that the first pressure sensor 8 is gathered are sent out
Give control device 7；The working signal of luffing handle 2 is sent to control device 7；The control device 7 is used to open or close
Luffing control valve 6, main valve 5 are closed, the forward or reverse of enclosed variable pump 4 is opened.
A kind of control method of luffing control system, comprises the following steps：
Step one：When luffing handle luffing falling signal input control device, control device sends rotating forward to enclosed variable pump
Signal, while opening main valve；
Step 2：Control device gathers pressure value S1, pressure value S2 respectively, when pressure value S1 reaches preset value S1 ', control
Device processed opens luffing control valve, and reverse signal is sent to enclosed variable pump；Preset value S1 ' the values of the pressure value S1 are such as
Under：When pressure value S2 is in 0-100bar, S1 '=S2 × 0.6；When pressure value S2 is in 100-200bar, S1 '=S2 × 0.7；Work as pressure
Force value S2 is in 200-300bar, S1 '=S2 × 0.8；When pressure value S2 is in more than 300bar, S1 '=S2 × 0.85.
In use, when luffing handle shifts certain angle onto, luffing handle signal is input to control device, main valve is opened,
Make the oil circuit conducting between A mouthfuls of enclosed variable pump to A1 mouthfuls of luffing control valve, control device gives enclosed variable pump one positive transfering the letter
Number, now, enclosed variable pump supply pressure oil works as control to the cavity volume between A1 mouthfuls of A mouthfuls of enclosed variable pump and luffing control valve
When device judges that S1/S2 value reaches the security strategy that the steady luffing of preset value falls, luffing control valve is opened, enclosed
Variable pump is inverted, and load promotes amplitude oil cylinder retraction, and pressure oil promotes enclosed pump to rotate, luffing steady fall.Luffing control valve
The pressure loss is nearly free from during luffing rises and falls, the effect of amplitude oil cylinder secure ratcs is only served, can also be become in enclosed
The external energy recycle device of pump is measured, part potential energy is recycled.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
1. a kind of luffing control system, including：Amplitude oil cylinder, luffing handle, hydraulic oil container, it is characterised in that：Also include：Enclosed
Variable pump, main valve, luffing control valve, control device, first pressure sensor, second pressure sensor, the amplitude oil cylinder
Big chamber is connected with luffing control valve, is connected between the A1 mouths and enclosed variable pump hydraulic fluid port A of luffing control valve by main valve, becomes
The small chamber of width oil cylinder is connected with hydraulic oil container；The first pressure sensor, which is used to measure at the A1 mouths of luffing control valve, presses
Power, the second pressure sensor is used for the big cavity pressure for measuring amplitude oil cylinder；The control device respectively with luffing handle, become
Width control valve, main valve, enclosed variable pump, first pressure sensor, second pressure sensor are connected；The first pressure sensing
Pressure value S1, the pressure value S2 of second pressure sensor collection of device collection are sent to control device；The luffing handle work
Control device is sent to as signal；The control device is used to be turned on and off luffing control valve, main valve, opens enclosed variable pump
Forward or reverse.
2. the control method of luffing control system according to claim 1, it is characterised in that：Comprise the following steps：
Step one：When luffing handle luffing falling signal input control device, control device sends positive rotaring signal to enclosed variable pump,
Main valve is opened simultaneously；
Step 2：Control device gathers pressure value S1, pressure value S2 respectively, when pressure value S1 reaches preset value S1 ', control dress
Unlatching luffing control valve is put, reverse signal is sent to enclosed variable pump；Preset value S1 ' the values of the pressure value S1 are as follows：When
Pressure value S2 is in 0-100bar, S1 '=S2 × α1, 0.6≤α1≤0.65；When pressure value S2 is in 100-200bar, S1 '=S2 ×
α2, 0.7≤α2≤0.75；When pressure value S2 is in 200-300bar, S1 '=S2 × α3, 0.8≤α3<0.85；When pressure value S2 exists
More than 300bar, S1 '=S2 × α4, 0.85≤α4≤0.9。
3. the control method of luffing control system according to claim 2, it is characterised in that：The α1=0.6, α2=
0.7, α3=0.8, α4=0.85.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566616.4A CN105967077B (en) | 2016-07-19 | 2016-07-19 | A kind of luffing control system and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566616.4A CN105967077B (en) | 2016-07-19 | 2016-07-19 | A kind of luffing control system and its control method |
Publications (2)
| Publication Number | Publication Date |
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| CN105967077A CN105967077A (en) | 2016-09-28 |
| CN105967077B true CN105967077B (en) | 2017-09-19 |
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| CN201610566616.4A Active CN105967077B (en) | 2016-07-19 | 2016-07-19 | A kind of luffing control system and its control method |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005330674A (en) * | 2004-05-19 | 2005-12-02 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Hydraulic circuit for crane hydraulic shovel |
| CN103482476B (en) * | 2013-09-29 | 2015-09-16 | 徐州重型机械有限公司 | A kind of control setup improving crane amplitude variation falling speed |
| CN104986675B (en) * | 2015-07-02 | 2017-06-30 | 浙江三一装备有限公司 | A kind of luffing range of cantilever support hydraulic system and crane |
| CN205187683U (en) * | 2015-11-20 | 2016-04-27 | 徐州重型机械有限公司 | Hoist, jib loading boom system and hydraulic control system |
| CN105523478B (en) * | 2015-12-29 | 2017-05-31 | 太原理工大学 | A kind of control loop of lifting machine equipment |
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| CN105967077A (en) | 2016-09-28 |
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