CN102720241B - Control method of automatic instantaneous reinforcement control system of excavator - Google Patents
Control method of automatic instantaneous reinforcement control system of excavator Download PDFInfo
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- CN102720241B CN102720241B CN201210215036.2A CN201210215036A CN102720241B CN 102720241 B CN102720241 B CN 102720241B CN 201210215036 A CN201210215036 A CN 201210215036A CN 102720241 B CN102720241 B CN 102720241B
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Abstract
The invention relates to a control method of an automatic instantaneous reinforcement control system of an excavator. In order to overcome the defect that in the control method of the automatic instantaneous reinforcement control system of the existing excavator, when soil is excavated and broken by the excavator, high pressure cannot be provided in real time, the invention provides the control method of the automatic instantaneous reinforcement control system of the excavator. The method comprises the following steps that through a controller, an electromagnetic valve is in a conduction state, the pressure at the outlet part of a hydraulic pump is detected, when the pressure at the outlet part of the hydraulic pump is greater than the preset pressure value, the first timing is carried out, when the time duration of the first timing exceeds the first preset time duration, the electromagnetic valve is turned off by the controller, in addition, the second timing is carried out, and when the time duration of the second timing exceeds the second preset time duration, the electromagnetic valve is turned on by the controller so that the electromagnetic valve is conducted. In the control method, the electromagnetic valve is in the conduction state at first, the overflowing is not generated when the output pressure of the hydraulic pump reaches the rated pressure, and the pressure is rapidly increased for adapting to the instantaneous reinforcement requirement during the excavation soil breaking, so the work efficiency of equipment is improved.
Description
Technical field
The present invention relates to a kind of control method, particularly relate to the control method of the automatic transient force boosting control system of a kind of excavator.
Background technology
Excavator is often furnished with a kind of transient force boosting control system automatically, as shown in Figure 1, this control system have controller, be connected with controller for detecting the induction installation of hydraulic system hydraulic pump outlet place pressure, controlled device cuts out the electromagnetic valve, the safety overflow valve that control with conducting, the control chamber of safety overflow valve is connected with hydraulic pump through electromagnetic valve.For this control system, when electromagnetic valve is closed condition, pressure when safety overflow valve is opened is not very high usually, and when conducting opened by electromagnetic valve, hydraulic oil enters into the control chamber of electromagnetic valve, and the oil pressure relief of safety overflow valve is raised.Existing control method is the normality of electromagnetic valve is closed condition, when induction installation sense hydraulic pump outlet place higher than preset value and exceed certain time length time, controller makes it open conducting to solenoid valves, the vent pressure of safety overflow valve is promoted, thus the operating pressure of hydraulic crawler excavator is promoted, obtain the larger mining ability that breaks ground.The such as operating pressure of existing hydraulic crawler excavator normally 34MPa, when closed electromagnetic valve, the oil pressure relief of safety overflow valve is 34MPa, when pump discharge place pressure being detected more than 34MPa pressure 0.5 second, controller output sends signal and makes electromagnetic valve open conducting, make hydraulic oil can enter into the control chamber of safety overflow valve, the oil pressure relief of safety overflow valve promotes gradually and makes excavator obtain larger digging force.
There is a shortcoming in the control method of this control system: when excavator breaks ground in a flash on excavate hard soils incision ground, hydraulic system pressure rises to suddenly 34MPa and just produces overflow, cannot produce larger hydraulic system pressure; After prexxure of the hydraulic pump reaches 34MPa and continued for 0.5 second, controller just outputs signal to electromagnetic valve, although after this hydraulic system pressure can rise to 37MPa, but because excavator breaks ground in a flash the past period on excavate hard soils incision ground, potential energy and the hydraulic system pressure of digger operating device comprehensively do not work, and actual excavation efficiency is not high.
Summary of the invention
The technical problem to be solved in the present invention can not provide the shortcoming of high pressure for the control method of the automatic transient force boosting control system of existing excavator in time when excavator excavates and breaks ground, and provide a kind of control method that can provide the automatic transient force boosting control system of the excavator of high pressure when excavating and breaking ground in time.
The present invention is the technical scheme that its technical problem of solution adopts: the control method providing the automatic transient force boosting control system of a kind of excavator, this control system comprises controller, the induction installation for detecting hydraulic system hydraulic pump outlet place pressure be connected with controller, controlled device cuts out the electromagnetic valve controlled with conducting, safety overflow valve, the control chamber of safety overflow valve is connected with hydraulic pump through electromagnetic valve, this control method comprises the following steps: controller makes electromagnetic valve be in conducting state and detects hydraulic pump outlet place pressure, first time timing is started when hydraulic pump outlet place pressure is greater than preset pressure value, when first time timing duration is more than the first preset duration, controller shut electromagnetic valve also carries out second time timing, when second time timing duration is more than the second preset duration, controller opens electromagnetic valve makes its conducting.In the present invention, electromagnetic valve is in normally open, when excavator digging or other need the action of high hydraulic pressure time, when the pressure at hydraulic pump outlet place reaches preset pressure value, there is not overflow, make hydraulic pump outlet output pressure can continue to rise fast and just start overflow after keeping the first preset duration, machine can be made like this can to obtain larger instantaneous hyperpressure having in shorter time, so that consistent with the practical working situation of machine, improve the operating efficiency of machine.After closed electromagnetic valve causes safety overflow valve generation overflow and continues the second preset duration, reopen electromagnetic valve and make its conducting, make control enter next circulation.
In the present invention, preset pressure value is generally the rated operating pressure of machine, and oil pressure relief during closed electromagnetic valve during safety overflow valve generation overflow equals preset pressure value.During solenoid valve conduction, oil pressure relief during safety overflow valve generation overflow is the force value of machine trouble free service.
In the present invention, preset pressure value is 34MPa, consistent with existing hydraulic crawler excavator common work rated pressure.
In the present invention, hydraulic pump comprises the hydraulic pump of two interflow work, detects two hydraulic pump outlet place pressure when detecting prexxure of the hydraulic pump simultaneously, when arbitrary hydraulic pump outlet place pressure is greater than preset pressure value, starts first time timing.
In the present invention, first preset time according to the hydraulic pressure length of hydraulic crawler excavator be
6 ~ 10second, preferably the first preset duration is 8 seconds.
In the present invention, the second preset duration is
8 ~ 12second, preferably the second preset duration is 10 seconds.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the automatic transient force boosting control system of excavator of the present invention.
Reference numeral:
First pressure sensor 1, second pressure sensor 2, controller 3, electromagnetic valve 4, safety overflow valve 5.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiments is described.
As shown in Figure 1, excavator in the present embodiment is collaborated to provide pressure oil to the hydraulic actuation device of excavator by two hydraulic pumps, the exit of two hydraulic pumps is respectively equipped with the first pressure sensor 1, second pressure sensor 2, detects the pressure at acquisition two hydraulic pump outlet places respectively.First pressure sensor 1, second pressure sensor 2 is connected with controller 3, being connected with electromagnetic valve 4 of controller 3, the closedown of Controlling solenoid valve 4 or open conducting.Electromagnetic valve 4 is communicated with the control chamber of safety overflow valve 5.In the present embodiment, the nominal operation hydraulic pressure of hydraulic crawler excavator is 34 MPa, and when electromagnetic valve 4 cuts out, the oil pressure relief of safety overflow valve 5 is 34 MPa, and when conducting opened by electromagnetic valve 4, the oil pressure relief of safety overflow valve can reach 37MPa.Preset pressure value in controller is 34 MPa, and the first preset duration is 8 seconds, and the second preset duration is 10 seconds.In the present embodiment to should the control method of system as follows, controller output voltage makes electromagnetic valve 4 be in and opens conducting state, controller 3 obtains the force value of two hydraulic pumps by the first pressure sensor 1, second pressure sensor 2, when the action need transient force boosting operation that machine carries out, time during as cut the earth in perching knife incision pan soil, the output pressure of hydraulic pump can increase and more than 34 MPa, when any one output pressure of two hydraulic pumps is higher than 34 MPa, then start first time timing.Although now the output pressure of hydraulic pump is higher than 34 MPa, but because electromagnetic valve is for opening conducting state, can't overflow be there is in safety overflow valve, so the output pressure of hydraulic pump can raise fast reach 37MPa, for when cutting the earth, the moment of perching knife incision pan soil provides transient force boosting in time, improve the operating efficiency of excavator.When the output pressure of hydraulic pump is higher than 37MPa, safety overflow valve 5 automatic overflow, guarantees that the hydraulic system of excavator is in safe pressure limit.After first time timing duration was more than 8 seconds, controller 4 stops, to solenoid valve, making closed electromagnetic valve, carries out second time timing simultaneously.After electromagnetic valve 4 cuts out, the oil pressure relief of safety overflow valve reduces to 34MPa, works long hours damage application life to avoid machinery equipment under high pressure conditions.After second time timing duration was more than 10 seconds, then controller makes it open conducting to solenoid valve again, hydraulic pump outlet place was through the overflow of 10 seconds, and pressure also also reduces to below 34MPa usually, and control system also just enters to be waited in the next controlled circulation needing transient force boosting action to occur.
In a controlled circulation in the present embodiment, electromagnetic valve is first just in conducting state, does not produce overflow and makes pressure promptly promote to adapt to excavate the needs of transient force boosting when breaking ground when the output pressure of hydraulic pump reaches 34MPa.
In the present embodiment, the oil pressure relief of preset pressure value, the first preset duration, the second preset duration and safety overflow valve correspondingly adjusts according to the parameter difference of the hydraulic system of hydraulic crawler excavator.
Claims (8)
1. the control method of the automatic transient force boosting control system of excavator, this control system comprises controller, the induction installation for detecting hydraulic system hydraulic pump outlet place pressure be connected with controller, controlled device cuts out the electromagnetic valve controlled with conducting, safety overflow valve, the control chamber of safety overflow valve is connected with hydraulic pump through electromagnetic valve, it is characterized in that this control method comprises the following steps: controller makes electromagnetic valve be in conducting state and detects hydraulic pump outlet place pressure, first time timing is started when hydraulic pump outlet place pressure is greater than preset pressure value, when first time timing duration is more than the first preset duration, controller shut electromagnetic valve also carries out second time timing, when second time timing duration is more than the second preset duration, controller opens electromagnetic valve makes its conducting.
2. the control method of the automatic transient force boosting control system of excavator according to claim 1, is characterized in that, force value when preset pressure value equals closed electromagnetic valve during safety overflow valve generation overflow.
3. the control method of the automatic transient force boosting control system of excavator according to claim 2, it is characterized in that, described preset pressure value is 34MPa.
4. the control method of the automatic transient force boosting control system of excavator according to any one of claims 1 to 3, it is characterized in that, described hydraulic pump comprises the hydraulic pump of two interflow work, detect two hydraulic pump outlet place pressure when detecting prexxure of the hydraulic pump simultaneously, when arbitrary hydraulic pump outlet place pressure is greater than preset pressure value, start first time timing.
5. the control method of the automatic transient force boosting control system of excavator according to any one of claims 1 to 3, it is characterized in that, described first preset duration is
6 ~ 10second.
6. the control method of the automatic transient force boosting control system of excavator according to claim 5, it is characterized in that, described first preset duration is 8 seconds.
7. the control method of the automatic transient force boosting control system of excavator according to any one of claims 1 to 3, it is characterized in that, described second preset duration is
8 ~ 12second.
8. the control method of the automatic transient force boosting control system of excavator according to claim 7, it is characterized in that, described second preset duration is 10 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210215036.2A CN102720241B (en) | 2012-06-27 | 2012-06-27 | Control method of automatic instantaneous reinforcement control system of excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210215036.2A CN102720241B (en) | 2012-06-27 | 2012-06-27 | Control method of automatic instantaneous reinforcement control system of excavator |
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| Publication Number | Publication Date |
|---|---|
| CN102720241A CN102720241A (en) | 2012-10-10 |
| CN102720241B true CN102720241B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210215036.2A Expired - Fee Related CN102720241B (en) | 2012-06-27 | 2012-06-27 | Control method of automatic instantaneous reinforcement control system of excavator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106284467B (en) * | 2016-08-12 | 2018-07-20 | 中冶建工集团有限公司 | Method of modifying for excavator to be adapted as to novel ripper |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2837393Y (en) * | 2005-03-25 | 2006-11-15 | 广西柳工机械股份有限公司 | Full power controller for excavator |
| CN102162267A (en) * | 2010-02-05 | 2011-08-24 | 日立建机株式会社 | Engine controller for the hydraulic circuit of a construction machine |
| CN102383455A (en) * | 2011-08-17 | 2012-03-21 | 浙江大学 | Transient force boosting control method for hybrid power excavating machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008128107A (en) * | 2006-11-21 | 2008-06-05 | Hitachi Constr Mach Co Ltd | Output control device for working machine |
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2012
- 2012-06-27 CN CN201210215036.2A patent/CN102720241B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2837393Y (en) * | 2005-03-25 | 2006-11-15 | 广西柳工机械股份有限公司 | Full power controller for excavator |
| CN102162267A (en) * | 2010-02-05 | 2011-08-24 | 日立建机株式会社 | Engine controller for the hydraulic circuit of a construction machine |
| CN102383455A (en) * | 2011-08-17 | 2012-03-21 | 浙江大学 | Transient force boosting control method for hybrid power excavating machine |
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| CN102720241A (en) | 2012-10-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: Yancheng Road, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province, No. 588 213161 Applicant after: LIUGONG CHANGZHOU MACHINERY Co.,Ltd. Applicant after: Liuzhou Liugong Excavators Co.,Ltd. Applicant after: GUANGXI LIUGONG MACHINERY Co.,Ltd. Address before: Yancheng Road, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province, No. 588 213161 Applicant before: LIUGONG CHANGZHOU EXCVAVTOR Co.,Ltd. Applicant before: Liuzhou Liugong Excavators Co.,Ltd. Applicant before: GUANGXI LIUGONG MACHINERY Co.,Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: LIUGONG CHANGZHOU EXCAVATOR CO., LTD. TO: LIUGONG MACHINERY CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 |
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| CF01 | Termination of patent right due to non-payment of annual fee |