CN102249154A - Free-slewing cushion and brake hydraulic system and method used in crawler crane - Google Patents
Free-slewing cushion and brake hydraulic system and method used in crawler crane Download PDFInfo
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- CN102249154A CN102249154A CN2010101816678A CN201010181667A CN102249154A CN 102249154 A CN102249154 A CN 102249154A CN 2010101816678 A CN2010101816678 A CN 2010101816678A CN 201010181667 A CN201010181667 A CN 201010181667A CN 102249154 A CN102249154 A CN 102249154A
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Abstract
The invention provides a free-slewing cushion and brake hydraulic system and method used in a crawler crane. The hydraulic system comprises a main rotary pump, an oil supplementing pump, an overflow valve, a brake valve, a brake, a rotary motor, a free-swing control valve and an inverse-proportional electromagnetic pressure reducing valve, wherein, the inverse-proportional electromagnetic pressure reducing valve is connected between the brake valve and the brake; the main rotary pump and the rotary motor are connected together to form a circuit; and the free-swing control valve is connected between the main rotary pump and the rotary motor. The free-slewing cushion and brake hydraulic system and method used in the crawler crane have the advantages of fast response speed and stable and reliable service performances; and by utilizing the system and method, stable and good brake effect can be provided, hydraulic impact and discomfort of a driver caused by brake are reduced maximally, and inertial impact on the active crawler crane from the passive crawler crane resulting from brake can be effectively prevented so as not to cause damage to the active crawler crane.
Description
Technical field
The present invention relates to a kind of hydraulic efficiency pressure system and control method thereof, especially, relate to a kind of be used for crawler crane freely turn round buffer-braking hydraulic efficiency pressure system and control method thereof.
Background technology
In the crane field, the Hydraulic slewing system of crawler crane has free revolute function usually.This is because under the situation that does not have the working connection fuel feeding, because external force (gravity, wind-force etc.) effect needs crawler crane to carry out freely turning round.Especially when two crawler cranes lifted an object simultaneously, needing wherein, a crawler crane turned round freely to turn round the active that cooperates another crawler crane.Meanwhile, need control the free turn state of crawler crane.
At present, the crawler crane Hydraulic slewing system all has free revolute function, but the control when it is stopped, thereby adopt the mode that free rotovalve is closed free rotation oil of closing usually.This control method is easy to produce hydraulic efficiency impact, driver's cab shake, problems such as running stability difference.
Summary of the invention
The technical problem to be solved in the present invention just provide a kind of be used for crawler crane freely turn round buffer-braking hydraulic efficiency pressure system and control method thereof, its can realize to the hydraulic efficiency pressure system of crawler crane carry out succinctly, efficient, the free revolution buffer-braking of failure-free.
In order to address the above problem, the invention provides a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, comprise main rotary pump, slippage pump, by pass valve, brake activation valve, drg, rotary motor, free rotary control valve, also comprise the inverse proportion electromagnetic relief pressure valve, wherein said inverse proportion electromagnetic relief pressure valve is connected between described brake activation valve and the described drg, and described main rotary pump and described rotary motor connect into a loop, and described free rotary control valve is connected between described main rotary pump and the described rotary motor.
Above-mentioned a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, wherein, described hydraulic efficiency pressure system is an open type hydraulic system.
Above-mentioned a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, wherein, described hydraulic efficiency pressure system is a closed fhdraulic system.
Above-mentioned a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, wherein, described brake activation valve is a manually operated.
Above-mentioned a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, wherein, described brake activation valve is electrically operated.
Above-mentioned a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, wherein, the current control of described inverse proportion electromagnetic relief pressure valve realizes by electric stretcher.
Above-mentioned a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, wherein, the current control of described inverse proportion electromagnetic relief pressure valve realizes by rotor switch.
In addition, the present invention also provides a kind of control method that freely turns round the buffer-braking hydraulic efficiency pressure system that is used for crawler crane,
In the active rotary loop, under normal circumstances, the QM2 of the QN1 of inverse proportion electromagnetic relief pressure valve and free control rotovalve must not, the QM1 of brake activation valve gets electric, and the oil of exporting from slippage pump enters drg through brake activation valve and inverse proportion electromagnetic relief pressure valve, opens drg, the oil of main rotary pump output is got back to main rotary pump again behind rotary motor, simultaneously, the oil of slippage pump output also enters main rotary pump, thereby has shielded the inverse proportion electromagnetic relief pressure valve;
In free rotary loop, the QN1 of inverse proportion electromagnetic relief pressure valve under normal circumstances must not, the QM2 of the QM1 of brake activation valve and free control rotovalve gets, the output oil of main rotary pump is zero, the oil of slippage pump output enters in the drg behind brake activation valve and inverse proportion electromagnetic relief pressure valve, opens drg, and the oil in the rotary motor enters in the rotary motor again through behind the free rotary control valve, simultaneously, the oil in the slippage pump enters in the described hydraulic efficiency pressure system.
Above-mentioned a kind of control method that freely turns round the buffer-braking hydraulic efficiency pressure system that is used for crawler crane, wherein, in free rotary loop, if the electric current of the QN1 of inverse proportion electromagnetic relief pressure valve is from diminishing greatly, then the hydraulic fluid port pressure of drg is then big from little change, thereby has realized the slow braking of drg.
Therefore, of the present invention a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system and control method both had been applicable to open type hydraulic system, be applicable to closed fhdraulic system again, it has the following advantages:
1. carry out glancing impact under the free turn state of crawler crane, this system can provide stabilizing effective braking effect, farthest reduces to brake the hydraulic efficiency impact that brings and the incompatibility sense of chaufeur;
2. carry out under the situation of collaborative work at two crawler cranes, passive crawler crane carries out glancing impact under free turn state, this system can actv. prevents that passive crawler crane from owing to the active inertia impact that crawler crane brings is given in braking, avoiding it is caused damage;
3. of the present invention a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system and the control method speed of response is fast, stable working is reliable.
Description of drawings
Fig. 1 is a kind of constructional drawing that freely turns round the buffer-braking hydraulic efficiency pressure system that is used for crawler crane of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is made further instructions.
Referring to shown in Figure 1, a kind of buffer-braking hydraulic efficiency pressure system of freely turning round that is used for crawler crane of the present invention comprises slippage pump 1, main rotary pump 2, brake activation valve 3, inverse proportion electromagnetic relief pressure valve 4, drg 5, rotary motor 6, free rotary control valve 7 and by pass valve 8.
Wherein, main rotary pump 2 connects into a loop with rotary motor 6, and free rotary control valve 7 is connected between main rotary pump 2 and the rotary motor 6.Between brake activation valve 3 and drg 5, connected an inverse proportion electromagnetic relief pressure valve 4.The pressure output meeting of described inverse proportion electromagnetic relief pressure valve 4 reduces along with the increase of electric current, and current control wherein can adopt electric stretcher, also can use rotor switch.In addition, brake activation valve 3 can adopt electrodynamic braking, also can adopt hand brake.
Introduce a kind of control method that freely turns round the buffer-braking hydraulic efficiency pressure system that is used for crawler crane of the present invention below in detail.
At first introduce initiatively rotary loop.In the active rotary loop, QN1, QM2 under normal circumstances must not electricity, and QM1 gets electric, from the oil of slippage pump 1A mouth output through brake activation valve 3P → A to inverse proportion electromagnetic relief pressure valve 4P → A to flowing, enter the A mouth of drg 5, open drg 5; The oil of the A mouth of main rotary pump 2 output is D by the road, and E arrives the A mouth of rotary motor 6, and by the B mouth of rotary motor 6 G by the road, F gets back in the B mouth of main rotary pump 2 again.The oil of the A mouth of slippage pump 1 output simultaneously is C by the road, and F enters the B mouth of main rotary pump 2, thereby has realized initiatively right-hand rotation.Under this working condition, 4 conductively-closeds of inverse proportion electromagnetic relief pressure valve were lost efficacy.Initiatively the left-hand revolution in like manner.
Introduce free rotary loop below.In free rotary loop, QN1 under normal circumstances must not be electric, QM1, QM2 gets electric, and the oil of main rotary pump 2 outputs is zero, the oil of slippage pump 1A mouth output through brake activation valve 3P → A to inverse proportion electromagnetic relief pressure valve 4P → A after flowing, enter the A mouth of drg 5, open drg 5; This moment is because external force (gravity, wind-force etc.) effect, the revolution of crawler crane dextrad, oil is through the B of rotary motor 6 mouth, pipeline G, again through the B → A of free rotary control valve 7 to the A mouth that enters rotary motor 6.The oil of while slippage pump 1A mouth output is C by the road, enters system, realizes free dextrad revolution.Free left-hand revolution in like manner.
If this moment is big from little change with the QN1 electric current of inverse proportion electromagnetic relief pressure valve 4, and then the hydraulic fluid port pressure of drg 5 will be from diminishing greatly, thereby realized the slowly process of braking of drg.
Therefore, of the present invention a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system and control method can provide stabilizing effective braking effect, farthest reduce to brake the hydraulic efficiency impact that brings and the incompatibility sense of chaufeur; Can actv. prevent that passive crawler crane from owing to the active inertia impact that crawler crane brings is given in braking, avoiding it is caused damage; Its speed of response is fast, and stable working is reliable.
More than specific embodiments of the invention are described in detail, but the present invention is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any this is used for freely turning round the equivalent modifications that buffer-braking hydraulic efficiency pressure system and control method thereof carry out and substituting also all among category of the present invention of crawler crane.Therefore, not breaking away from impartial conversion and the modification of having done under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (9)
- One kind be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, by main rotary pump, slippage pump, by pass valve, brake activation valve, drg, rotary motor, free rotary control valve is formed, it is characterized in that, also comprise the inverse proportion electromagnetic relief pressure valve, wherein said inverse proportion electromagnetic relief pressure valve is connected between described brake activation valve and the described drg, described main rotary pump and described rotary motor connect into a loop, and described free rotary control valve is connected between described main rotary pump and the described rotary motor.
- 2. according to claim 1 a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, it is characterized in that described hydraulic efficiency pressure system is an open type hydraulic system.
- 3. according to claim 1 a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, it is characterized in that described hydraulic efficiency pressure system is a closed fhdraulic system.
- 4. according to claim 1 a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, it is characterized in that described brake activation valve is a manually operated.
- 5. according to claim 1 a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, it is characterized in that described brake activation valve is electrically operated.
- 6. according to claim 1 a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, it is characterized in that the current control of described inverse proportion electromagnetic relief pressure valve realizes by electric stretcher.
- 7. according to claim 1 a kind of be used for crawler crane freely turn round the buffer-braking hydraulic efficiency pressure system, it is characterized in that the current control of described inverse proportion electromagnetic relief pressure valve realizes by rotor switch.
- 8. a control method that freely turns round the buffer-braking hydraulic efficiency pressure system that is used for crawler crane is characterized in that,In the active rotary loop, under normal circumstances, the QM2 of the QN1 of inverse proportion electromagnetic relief pressure valve and free control rotovalve must not, the QM1 of brake activation valve gets electric, and the oil of exporting from slippage pump enters drg through brake activation valve and inverse proportion electromagnetic relief pressure valve, opens drg, the oil of main rotary pump output is got back to main rotary pump again behind rotary motor, simultaneously, the oil of slippage pump output also enters main rotary pump, thereby has shielded the inverse proportion electromagnetic relief pressure valve;In free rotary loop, the QN1 of inverse proportion electromagnetic relief pressure valve under normal circumstances must not, the QM2 of the QM1 of brake activation valve and free control rotovalve gets, the output oil of main rotary pump is zero, the oil of slippage pump output enters in the drg behind brake activation valve and inverse proportion electromagnetic relief pressure valve, opens drg, and the oil in the rotary motor enters in the rotary motor again through behind the free rotary control valve, simultaneously, the oil in the slippage pump enters in the described hydraulic efficiency pressure system.
- 9. a kind of control method that freely turns round the buffer-braking hydraulic efficiency pressure system that is used for crawler crane according to claim 8, it is characterized in that, in free rotary loop, if the electric current of the QN1 of inverse proportion electromagnetic relief pressure valve is from diminishing greatly, then the hydraulic fluid port pressure of drg is then big from little change, thereby has realized the slow braking of drg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101816678A CN102249154A (en) | 2010-05-21 | 2010-05-21 | Free-slewing cushion and brake hydraulic system and method used in crawler crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101816678A CN102249154A (en) | 2010-05-21 | 2010-05-21 | Free-slewing cushion and brake hydraulic system and method used in crawler crane |
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| CN102249154A true CN102249154A (en) | 2011-11-23 |
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| CN2010101816678A Pending CN102249154A (en) | 2010-05-21 | 2010-05-21 | Free-slewing cushion and brake hydraulic system and method used in crawler crane |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583179A (en) * | 2012-02-17 | 2012-07-18 | 上海三一科技有限公司 | Crawler crane hydraulic control system and crane with crawler crane hydraulic control system |
| CN102730582A (en) * | 2012-06-20 | 2012-10-17 | 上海三一科技有限公司 | Hydraulic rotary system start-stop buffering device, and crane |
| CN103470567A (en) * | 2013-09-26 | 2013-12-25 | 镇江金天辰新材料有限公司 | Trailer system of skid loader |
| CN103352889B (en) * | 2013-07-08 | 2015-07-01 | 太原理工大学 | Method for buffering hydraulic system shock of crawler loader |
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| CN2072546U (en) * | 1990-07-10 | 1991-03-06 | 李建启 | Hydraulic shovel slewing system with reclaiming brake energy |
| JPH06255985A (en) * | 1993-03-05 | 1994-09-13 | Sumitomo Constr Mach Co Ltd | Control device for crane |
| CN101062752A (en) * | 2006-04-30 | 2007-10-31 | 贺勍 | Servo-actuated damped control method for eliminating inertial shake and collision of engineering crane up-hoisting |
| CN200974749Y (en) * | 2006-11-28 | 2007-11-14 | 中国北车集团兰州机车厂 | Crane rotary dynamic control locking mechanism |
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2010
- 2010-05-21 CN CN2010101816678A patent/CN102249154A/en active Pending
Patent Citations (4)
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| CN2072546U (en) * | 1990-07-10 | 1991-03-06 | 李建启 | Hydraulic shovel slewing system with reclaiming brake energy |
| JPH06255985A (en) * | 1993-03-05 | 1994-09-13 | Sumitomo Constr Mach Co Ltd | Control device for crane |
| CN101062752A (en) * | 2006-04-30 | 2007-10-31 | 贺勍 | Servo-actuated damped control method for eliminating inertial shake and collision of engineering crane up-hoisting |
| CN200974749Y (en) * | 2006-11-28 | 2007-11-14 | 中国北车集团兰州机车厂 | Crane rotary dynamic control locking mechanism |
Non-Patent Citations (2)
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| 张明辉: "大型履带起重机回转液压系统仿真研究", 《中国优秀硕博硕士论文全文数据库（硕士）工程科技II辑》, no. 02, 15 February 2007 (2007-02-15), pages 9 - 15 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583179A (en) * | 2012-02-17 | 2012-07-18 | 上海三一科技有限公司 | Crawler crane hydraulic control system and crane with crawler crane hydraulic control system |
| CN102730582A (en) * | 2012-06-20 | 2012-10-17 | 上海三一科技有限公司 | Hydraulic rotary system start-stop buffering device, and crane |
| CN102730582B (en) * | 2012-06-20 | 2014-12-17 | 上海三一科技有限公司 | Hydraulic rotary system start-stop buffering device, and crane |
| CN103352889B (en) * | 2013-07-08 | 2015-07-01 | 太原理工大学 | Method for buffering hydraulic system shock of crawler loader |
| CN103470567A (en) * | 2013-09-26 | 2013-12-25 | 镇江金天辰新材料有限公司 | Trailer system of skid loader |
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Application publication date: 20111123 |