CN104033440A - Pressure regulating device and pressure regulating method for hydraulic system and crane - Google Patents
Pressure regulating device and pressure regulating method for hydraulic system and crane Download PDFInfo
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- CN104033440A CN104033440A CN201410295517.8A CN201410295517A CN104033440A CN 104033440 A CN104033440 A CN 104033440A CN 201410295517 A CN201410295517 A CN 201410295517A CN 104033440 A CN104033440 A CN 104033440A
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Abstract
The invention discloses a pressure regulating device and a pressure regulating method for a hydraulic system and a crane. The pressure regulating device comprises a control device and a proportional overflow valve, wherein the proportional overflow valve is used for regulating the pressure of the hydraulic system and is arranged in a hydraulic loop of the hydraulic system; the control device is electrically connected with the proportional overflow valve; and the proportional overflow valve controls pressure in the hydraulic loop according to electric signals outputted by the control device. By using the pressure regulating device and the pressure regulating method for the hydraulic system and the crane, the overflow pressure of the proportional overflow valve is changed according to the intensity of the electric signals outputted by the control device, the pressure value of the hydraulic system is adjusted automatically according to different work conditions of the crane, the pressure regulating range is wide, and the number of pressure regulating points is large, the pressure regulating method is simple and reliable, and the expandability is high.
Description
Technical field
The present invention relates to technical field of engineering machinery, relate in particular to a kind of regulator, method and hoist of hydraulic system.
Background technique
Along with hoist is to maximization, multifunction, intelligent development, crane functions is more, and its hydraulic system is more complicated.Crane chassis hydraulic system is by landing leg stretching system, hydro-pneumatic suspension system, and electric liquid steering system, a plurality of subtense angles such as hydraulic radiating form, and its leg system and hydro-pneumatic suspension system share the actions such as same pressure oil-source is realized landing leg stretching and suspension is flexible.Supporting leg action comprises that horizontal support legs oil cylinder stretches, contracts, and vertical support oil cylinder is stretched, contracted, and supporting leg oscillating oil cylinder is stretched, contracted; Suspension action comprises that suspension oil cylinder stretches, contracts.Because the load of oil cylinder is different, the pressure that each action is corresponding different, need to increase pressure adjusting module and carry out pressure regulation.Prior art scheme is according to pressure demand different in hydraulic system, adopts the relief valve corresponding with it, forms a pressure control module, and according to difference, action is controlled solenoid valve, to obtain different system pressures.This scheme need to adopt according to different pressure demand the relief valve of different model, and each relief valve can only corresponding a kind of pressure, and form is more single.As system has other pressure demand of increasing, just should increase corresponding relief valve and associated solenoid valve, it is more complicated that system architecture can become.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of regulator, method and hoist of hydraulic system, can passing ratio relief valve controls the pressure of hydraulic system.
A regulator for hydraulic system, comprising: control gear and for adjusting the proportional pressure control valve of hydraulic system pressure; Described proportional pressure control valve is arranged in the oil hydraulic circuit of described hydraulic system, and described control gear is electrically connected to the spool of described proportional pressure control valve, and described proportional pressure control valve is controlled the pressure in oil hydraulic circuit according to the electrical signal of described control gear output.
According to one embodiment of present invention, also comprise: for adjusting the manual pressure regulating valve of hydraulic system pressure; Described manual pressure regulating valve is arranged in the oil hydraulic circuit of described hydraulic system.
According to one embodiment of present invention, described hydraulic system comprises: landing leg stretching system and hydro-pneumatic suspension system; The control current ratio that outputs to described proportional overflow valve core coil is determined in the action that described control gear is carried out according to described landing leg stretching system, described hydro-pneumatic suspension system; The action that described landing leg stretching system is carried out comprises: horizontal support legs oil cylinder is flexible, vertical support oil cylinder is flexible, supporting leg oscillating oil cylinder is flexible; The action that described hydro-pneumatic suspension system is carried out comprises: suspension oil cylinder is flexible.
According to one embodiment of present invention, described landing leg stretching system comprises: support oil cylinder valve group; Described hydro-pneumatic suspension system comprises: suspension oil cylinder valve group; Described control gear is connected with described suspension oil cylinder valve group with described support oil cylinder valve group respectively.
According to one embodiment of present invention, described control gear comprises storage unit; The working curve of described cell stores proportional pressure control valve, the control current ratio relation curve corresponding with oil pressure relief that described working curve is proportional pressure control valve; The pressure of hydraulic system and the oil pressure relief of proportional pressure control valve are determined in the action that described control gear is carried out according to described landing leg stretching system, described hydro-pneumatic suspension system, according to described working curve, obtain the corresponding control current ratio of oil pressure relief therewith.
A hoist, comprises the regulator of hydraulic system as above.
A pressure regulating method for hydraulic system, comprising: control gear is determined hydraulic system pressure according to operating mode; Control gear is to the proportional pressure control valve output electrical signals being arranged in the oil hydraulic circuit of hydraulic system; Described proportional pressure control valve is controlled the pressure in oil hydraulic circuit according to described electrical signal.
According to one embodiment of present invention, by the manual pressure regulating valve being arranged in the oil hydraulic circuit of described hydraulic system, adjust hydraulic system pressure.
According to one embodiment of present invention, described control gear is controlled the control current ratio of the spool coil that outputs to described proportional pressure control valve according to performing an action of landing leg stretching system, hydro-pneumatic suspension system; Performing an action of described landing leg stretching system comprises: horizontal support legs oil cylinder is flexible, vertical support oil cylinder is flexible, supporting leg oscillating oil cylinder is flexible; Performing an action of described hydro-pneumatic suspension system comprises: suspension oil cylinder is flexible.
According to one embodiment of present invention, the working curve of stored ratio relief valve in the storage unit of described control gear, the control current ratio relation curve corresponding with oil pressure relief that described working curve is proportional pressure control valve; The pressure of hydraulic system and the oil pressure relief of proportional pressure control valve are determined in the action that described control gear is carried out according to described landing leg stretching system, described hydro-pneumatic suspension system, according to described working curve, obtain the corresponding control current ratio of oil pressure relief therewith.
The regulator of hydraulic system of the present invention, method and hoist, by the size of control gear output electrical signals, change the oil pressure relief of proportional pressure control valve, and then the force value of change hydraulic system, can be according to the different operating modes of hoist, automatically realize the adjustment of hydraulic system pressure value, solved the challenge under hoist several work operating mode, hydraulic system pressure being regulated in real time, range of regulation, pressure regulation point are more extensively more, pressure regulating method is simple and reliable, and extensibility is strong.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is according to the regulator of hydraulic system of the present invention embodiment's hydraulic pressure block diagram;
Fig. 2 is according to the regulator of hydraulic system of the present invention embodiment's electrical diagram;
Fig. 3 is according to the schematic diagram of the working curve of the regulator of hydraulic system of the present invention embodiment's proportional pressure control valve;
Fig. 4 is according to the pressure regulating method of hydraulic system of the present invention embodiment's flow chart;
Fig. 5 is according to another embodiment's of the pressure regulating method of hydraulic system of the present invention flow chart.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment who obtains under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, 2, the regulator of hydraulic system comprises: control gear (not shown in FIG.) and for adjusting the proportional pressure control valve 11 of hydraulic system pressure.Proportional pressure control valve 11 is arranged in the oil hydraulic circuit of hydraulic system, control gear is electrically connected to the spool of proportional pressure control valve 11, proportional pressure control valve 11 is controlled the pressure in oil hydraulic circuit according to the electrical signal of control gear output, and electrical signal can be voltage signal or current signal.
Proportional pressure control valve is the hydraulic control valve that a kind of parameter (pressure) that can make exported fluid changes pro rata with the variation of input electrical signal parameter (curtage).Amplifier provides suitable driving current to Proportional valve, with the adjustment amount of calibrating valve, makes it corresponding with the input signal of supplying with amplifier.Proportional pressure control valve mainly plays level pressure overflow, voltage stabilizing, system unloaded and safety protection effect in hydraulic system.According to the variation of the ferroelectric signal of input valve body internal electromagnetic, produce corresponding actions, make valve core of the electromagnetic valve produce displacement, port size changes and completes the pressure corresponding with input electrical signal or flow output with this.For example, one end of spool is the pressure that hydraulic oil produces, the other end is mechanical force, proportional pressure control valve directly produces thrust on spool by electromagnet, input voltage on electromagnet can change between 0-24 volt, the thrust producing just changes thereupon, thereby obtains continually varying hydraulic pressure.
According to one embodiment of present invention, hydraulic system is also provided for adjusting the manual pressure regulating valve 12 of hydraulic system pressure, and manual pressure regulating valve 12 is arranged in the oil hydraulic circuit of hydraulic system.The regulator of hydraulic system of the present invention, proportional pressure control valve 11 is main pressure regulator valve, range of regulation can mate according to design requirement.Manual pressure regulating valve 12 is as redundancy, can manually-operable pressure regulation when proportional pressure control valve 11 lost efficacy, guarantee hydraulic system elemental motion pressure.
According to one embodiment of present invention, hydraulic system comprises: landing leg stretching system and hydro-pneumatic suspension system.Landing leg stretching system comprises: Vertical Cylinders dilaton system 13, oscillating oil cylinder dilaton system 15, cross cylinder dilaton system 14.The action that landing leg stretching system is carried out comprises: horizontal support legs oil cylinder is flexible, vertical support oil cylinder is flexible, supporting leg oscillating oil cylinder is flexible.Hydro-pneumatic suspension system comprises: suspension oil cylinder dilaton system 16.The action that hydro-pneumatic suspension system is carried out comprises: suspension oil cylinder is flexible.The action control that control gear is carried out according to landing leg stretching system, hydro-pneumatic suspension system outputs to the control current ratio of proportional overflow valve core coil.
According to one embodiment of present invention, landing leg stretching system comprises: support oil cylinder valve group 19.Hydro-pneumatic suspension system comprises: suspension oil cylinder valve group 20.Control gear 18 is connected with suspension oil cylinder valve group 20 with support oil cylinder valve group 19 respectively.For example, in support oil cylinder valve group 19, suspension oil cylinder valve group 20, have a plurality of solenoid valves etc., control gear 18 is electrically connected to a plurality of solenoid valves in support oil cylinder valve group 19, suspension oil cylinder valve group 20, and solenoid valve is controlled.Control gear 18, by controlling support oil cylinder valve group 19 and suspension oil cylinder valve group 20, completes the actions such as horizontal support legs oil cylinder is flexible, vertical support oil cylinder is flexible, supporting leg oscillating oil cylinder is flexible, suspension oil cylinder is flexible.
As shown in Figure 2, control gear 18 is electrically connected to sensor, displacement transducer or the contact-making switch etc. that arrange in horizontal support legs oil cylinder 21, vertical support oil cylinder 22, supporting leg oscillating oil cylinder 23 and suspension oil cylinder 24 respectively, when horizontal support legs oil cylinder 21, vertical support oil cylinder 22, supporting leg oscillating oil cylinder 23 and suspension oil cylinder 24 are stretched, during contracting, to control gear 18 transmitted signals, such as switching signal etc.Control gear 18, according to this signal, judges the residing operating mode of hoist, and the pressure of definite hydraulic system, and to proportional pressure control valve 11 output electrical signals, proportional pressure control valve 11 is controlled the pressure in oil hydraulic circuit according to electrical signal.
According to one embodiment of present invention, supporting leg action comprises that horizontal support legs oil cylinder stretches, contracts, and vertical support oil cylinder is stretched, contracted, and supporting leg oscillating oil cylinder is stretched, contracted; Suspension action comprises that suspension oil cylinder stretches, contracts.Because the load of oil cylinder is different, the pressure that each action is corresponding different, need to increase pressure adjusting module and carry out pressure regulation.Following table 1 is each cylinder action pressure demand:
| Denomination of dive | Pressure demand (MP) |
| Vertical support oil cylinder is stretched | 21 |
| Vertical support oil cylinder contracting | 21 |
| Horizontal support legs oil cylinder is stretched | 10 |
| The contracting of horizontal support legs oil cylinder | 21 |
| Suspension oil cylinder liter | 15 |
| Suspension oil cylinder falls | 0 |
| Supporting leg oscillating oil cylinder is stretched | 10 |
| The contracting of supporting leg oscillating oil cylinder | 15 |
Table-cylinder action pressure gauge
The regulator of hydraulic system of the present invention, adopt control gear 18 control ratio relief valves 11 as pressure control module, by changing the electrical signal size of control gear 18 input proportional pressure control valves 11, realize the different oil pressure relief of proportional pressure control valve 11, to meet the pressure demand of hydraulic system under different operating modes.
Control gear 18 output electrical signals are to proportional pressure control valve 11, and valve body electromagnetic induction coil produces magnetic induction force, when system pressure is greater than magnetic induction force, and spool action, valve port is opened generation overflow.The range of regulation of the proportional dump valve 11 that hoist is selected is 0-276Bar, its characteristic curve as shown in Figure 3: the working curve of proportional pressure control valve is a continous curve, adjustable continuously in its operating range.Input electrical signal and oil pressure relief are linear ratio relation, by changing the input current of proportional pressure control valve, change its pressure.
According to one embodiment of present invention, control gear 18 comprises storage unit.The working curve of cell stores proportional pressure control valve, the control current ratio relation curve corresponding with oil pressure relief that working curve is proportional pressure control valve; The pressure of hydraulic system and the oil pressure relief of proportional pressure control valve are determined in the action that control gear 18 is carried out according to landing leg stretching system, hydro-pneumatic suspension system, according to working curve, obtain the corresponding control current ratio of oil pressure relief therewith.
According to one embodiment of present invention, a kind of hoist, comprises the regulator of hydraulic system as above.
Fig. 4 is according to the pressure regulating method of hydraulic system of the present invention embodiment's flow chart, as shown in Figure 4:
Step 301, control gear is determined hydraulic system pressure according to operating mode.
Step 302, control gear is to the proportional pressure control valve output electrical signals being arranged in the oil hydraulic circuit of hydraulic system.
Step 303, proportional pressure control valve is controlled the pressure in oil hydraulic circuit according to electrical signal.
According to one embodiment of present invention, by the manual pressure regulating valve being arranged in the oil hydraulic circuit of hydraulic system, adjust hydraulic system pressure.
According to one embodiment of present invention, control gear is controlled the control current ratio of the spool coil that outputs to proportional pressure control valve according to performing an action of landing leg stretching system, hydro-pneumatic suspension system.Performing an action of landing leg stretching system comprises: horizontal support legs oil cylinder is flexible, vertical support oil cylinder is flexible, supporting leg oscillating oil cylinder is flexible.Performing an action of hydro-pneumatic suspension system comprises: suspension oil cylinder is flexible.
According to one embodiment of present invention, the working curve of stored ratio relief valve in the storage unit of control gear, the control current ratio relation curve corresponding with oil pressure relief that working curve is proportional pressure control valve.The pressure of hydraulic system and the oil pressure relief of proportional pressure control valve are determined in the action that control gear is carried out according to landing leg stretching system, hydro-pneumatic suspension system, according to working curve, obtain the corresponding control current ratio of oil pressure relief therewith.
Fig. 5 is according to another embodiment's of the pressure regulating method of hydraulic system of the present invention flow chart, as shown in Figure 5:
Step 401-403, judge whether hoist carries out that supporting leg level is stretched, suspension rises or fall, the action such as supporting leg is vertically stretched, contracting or the contracting of supporting leg level.
Step 404-406, according to the known landing leg stretching of table 1 and the required pressure of suspension lifting action, be 10MPa, 15MPa and 21MPa, and can show that according to Fig. 3 10MPa, 15MPa and control percentage of current corresponding to 21MPa are 48%, 65% and 81%, control gear sends this to proportional pressure control valve and controls current ratio.
The regulator of hydraulic system of the present invention, method and hoist, have advantages of following:
1, simplify original system voltage regulating module and electric control system, with a proportional pressure control valve, replaced a plurality of relief valves, reduced solenoid valve quantity.
2, range of regulation, pressure regulation point are more extensively more, can select as required the proportional pressure control valve of different pressures scope, realize arbitrarily pressure regulation within the scope of its pressure diagram.
3, pressure regulating method is simple and reliable, and extensibility is strong.
4, redundancy a set of manual operating device, when proportional overflow defective valve (as electrical failure, valve damage), system still can, in operation, guarantee hydraulic system elemental motion.
May realize in many ways method and system of the present invention.For example, can realize method and system of the present invention by any combination of software, hardware, firmware or software, hardware, firmware.The said sequence that is used for the step of method is only in order to describe, and the step of method of the present invention is not limited to above specifically described order, unless otherwise specified.In addition, in certain embodiments, can be also the program being recorded in recording medium by the invention process, these programs comprise for realizing the machine readable instructions of the method according to this invention.Thereby the present invention also covers storage for carrying out the recording medium of the program of the method according to this invention.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiments with various modifications that the present invention's design is suitable for special-purpose.
Claims (10)
1. a regulator for hydraulic system, is characterized in that, comprising:
Control gear and for adjusting the proportional pressure control valve of hydraulic system pressure;
Described proportional pressure control valve is arranged in the oil hydraulic circuit of described hydraulic system, and described control gear is electrically connected to the spool of described proportional pressure control valve, and described proportional pressure control valve is controlled the pressure in oil hydraulic circuit according to the electrical signal of described control gear output.
2. regulator as claimed in claim 1, is characterized in that, also comprises:
For adjusting the manual pressure regulating valve of hydraulic system pressure;
Described manual pressure regulating valve is arranged in the oil hydraulic circuit of described hydraulic system.
3. regulator as claimed in claim 1, is characterized in that:
Described hydraulic system comprises: landing leg stretching system and hydro-pneumatic suspension system;
The control current ratio that outputs to described proportional overflow valve core coil is determined in the action that described control gear is carried out according to described landing leg stretching system, described hydro-pneumatic suspension system;
The action that described landing leg stretching system is carried out comprises: horizontal support legs oil cylinder is flexible, vertical support oil cylinder is flexible, supporting leg oscillating oil cylinder is flexible; The action that described hydro-pneumatic suspension system is carried out comprises: suspension oil cylinder is flexible.
4. regulator as claimed in claim 3, is characterized in that:
Described landing leg stretching system comprises: support oil cylinder valve group; Described hydro-pneumatic suspension system comprises: suspension oil cylinder valve group; Described control gear is connected with described suspension oil cylinder valve group with described support oil cylinder valve group respectively.
5. regulator as claimed in claim 3, is characterized in that:
Described control gear comprises storage unit;
The working curve of described cell stores proportional pressure control valve, the control current ratio relation curve corresponding with oil pressure relief that described working curve is proportional pressure control valve;
The pressure of hydraulic system and the oil pressure relief of proportional pressure control valve are determined in the action that described control gear is carried out according to described landing leg stretching system, described hydro-pneumatic suspension system, according to described working curve, obtain the corresponding control current ratio of oil pressure relief therewith.
6. a hoist, is characterized in that:
The regulator that comprises the hydraulic system as described in claim 1 to 5 any one.
7. a pressure regulating method for hydraulic system, is characterized in that, comprising:
Control gear is determined hydraulic system pressure according to operating mode;
Control gear is to the proportional pressure control valve output electrical signals being arranged in the oil hydraulic circuit of hydraulic system;
Described proportional pressure control valve is controlled the pressure in oil hydraulic circuit according to described electrical signal.
8. pressure regulating method as claimed in claim 7, is characterized in that, also comprises:
By the manual pressure regulating valve being arranged in the oil hydraulic circuit of described hydraulic system, adjust hydraulic system pressure.
9. pressure regulating method as claimed in claim 8, is characterized in that:
Described control gear is determined the control current ratio of the spool coil that outputs to described proportional pressure control valve according to performing an action of landing leg stretching system, hydro-pneumatic suspension system;
Performing an action of described landing leg stretching system comprises: horizontal support legs oil cylinder is flexible, vertical support oil cylinder is flexible, supporting leg oscillating oil cylinder is flexible; Performing an action of described hydro-pneumatic suspension system comprises: suspension oil cylinder is flexible.
10. pressure regulating method as claimed in claim 9, is characterized in that, also comprises:
The working curve of stored ratio relief valve in the storage unit of described control gear, the control current ratio relation curve corresponding with oil pressure relief that described working curve is proportional pressure control valve;
The pressure of hydraulic system and the oil pressure relief of proportional pressure control valve are determined in the action that described control gear is carried out according to described landing leg stretching system, described hydro-pneumatic suspension system, according to described working curve, obtain the corresponding control current ratio of oil pressure relief therewith.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410295517.8A CN104033440A (en) | 2014-06-26 | 2014-06-26 | Pressure regulating device and pressure regulating method for hydraulic system and crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410295517.8A CN104033440A (en) | 2014-06-26 | 2014-06-26 | Pressure regulating device and pressure regulating method for hydraulic system and crane |
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| CN104033440A true CN104033440A (en) | 2014-09-10 |
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| CN201410295517.8A Pending CN104033440A (en) | 2014-06-26 | 2014-06-26 | Pressure regulating device and pressure regulating method for hydraulic system and crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104477800A (en) * | 2014-11-24 | 2015-04-01 | 徐州重型机械有限公司 | Buffer control system of swing mechanism, buffer control method and crane |
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| CN204003708U (en) * | 2014-06-26 | 2014-12-10 | 徐州重型机械有限公司 | A kind of regulator of hydraulic system and hoist |
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2014
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07290549A (en) * | 1994-04-25 | 1995-11-07 | Niigata Eng Co Ltd | Hydraulic circuit of injection molding machine |
| JP2011016644A (en) * | 2009-07-10 | 2011-01-27 | Kobelco Cranes Co Ltd | Hydraulic control device of construction machine |
| CN101748766A (en) * | 2009-12-17 | 2010-06-23 | 三一重机有限公司 | Pressure control method and control loop thereof for actuating mechanism of excavating machine |
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| CN104477800A (en) * | 2014-11-24 | 2015-04-01 | 徐州重型机械有限公司 | Buffer control system of swing mechanism, buffer control method and crane |
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Application publication date: 20140910 |
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