CN102535570A - Electro-hydraulic integral control device for engine throttle of hydraulic digging machine - Google Patents
Electro-hydraulic integral control device for engine throttle of hydraulic digging machine Download PDFInfo
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- CN102535570A CN102535570A CN2012100257647A CN201210025764A CN102535570A CN 102535570 A CN102535570 A CN 102535570A CN 2012100257647 A CN2012100257647 A CN 2012100257647A CN 201210025764 A CN201210025764 A CN 201210025764A CN 102535570 A CN102535570 A CN 102535570A
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Abstract
The invention discloses an electro-hydraulic integral control device for an engine throttle of a hydraulic digging machine. The electro-hydraulic integral control device comprises a controller, an executer, a pressure reduction valve and a connecting plate, wherein a voltage signal control knob is arranged on the controller. The electro-hydraulic integral control device is mainly characterized in that the current signal output end of the controller is connected with an electromagnetic proportion valve of the executer through a conducting wire, an oil inlet of the executer is communicated with the pressure reduction valve through an oil guide pipe, an oil return opening of the executer is communicated with an oil return pipe of the pressure reduction valve through the oil guide pipe, an oil inlet of the pressure reduction valve is connected with an electromagnetic valve group through a pipeline, and the executer is connected with a connecting plate through a ball head connecting rod. The electro-hydraulic integral control device solves the technical problems of long regulation time, instability, great error and poor reliability of the system in the prior art.
Description
Technical field the invention belongs to hydraulic crawler excavator engine control technical field, relates to the composite control apparatus of the electric and hydraulic system of hydraulic crawler excavator engine throttle, is specifically related to a kind of hydraulic crawler excavator engine throttle electricity liquid composite control apparatus.
The hydraulic crawler excavator throttle control system that background technology is traditional structurally adopts the direct current generator rotation or directly pushes away mode, drives acceleration cable, changes engine throttle opening, the rotating speed of adjustment motor.Have two kinds of control methods on the control mode: a kind of when being speed governing according to the difference of the current rotating speed of motor and rotating speed of target, control the displacement of throttle motor; Another kind is first through manual calibration, the accelerator open degree under the mark different target rotating speed.According to the difference of current throttle position and target throttle position, control the displacement of throttle motor during speed governing.
Prior art all adopts closed loop control mode, depends on current speed or position signalling, when speed-changing, is easy to generate overshoot, needs the adjustment in a plurality of cycles, could accomplish rotating speed and switch.System exists the adjustment time long, and the phenomenon that the rotating speed shake is unstable, error is big influences the performance of engine performance; When governing system generation mechanical breakdown, can not effectively protect, be prone to cause the damage of throttle motor and control circuit, reduced the reliability of system.
Summary of the invention the objective of the invention is to solve prior art exist system exist the adjustment time long, unstable, error is big and the technical problem of poor reliability, and a kind of hydraulic crawler excavator engine throttle electricity liquid composite control apparatus is provided.
Hydraulic crawler excavator engine throttle electricity liquid composite control apparatus of the present invention; Comprise controller, actuator, reducing valve and junction plate; Controller is provided with the voltage signal control handle, and its main points are that the current signal output end of controller is connected with the electromagnetic proportional valve of actuator through lead, and the oil-in of said actuator is communicated with reducing valve through oil guide pipe; The oil return opening of actuator is communicated with the oil return pipe of reducing valve through oil guide pipe, and the oil-in of reducing valve is connected with electromagnetic valve group through pipeline; Said actuator is connected with junction plate through the bulb connecting rod.
The invention solves prior art exist system exist the adjustment time long, unstable, error is big and the technical problem of poor reliability.
Description of drawings Fig. 1 is a structural principle sketch map of the present invention;
Fig. 2 is actuator of the present invention and junction plate syndeton sketch map.
Among the figure 1, control handle 2, controller 3, reducing valve 4, actuator 5, electromagnetic proportional valve 6, bulb connecting rod 7, junction plate
The specific embodiment is according to Fig. 1 and Fig. 2; Hydraulic crawler excavator engine throttle electricity liquid composite control apparatus of the present invention; Comprise controller 2, actuator 4, reducing valve 3 and junction plate 7; Controller 2 is provided with voltage signal control handle 1, and the current signal output end of controller 2 is connected with the electromagnetic proportional valve 5 of actuator 4 through lead, and the oil-in of said actuator 4 is communicated with reducing valve 3 through oil guide pipe; The oil return opening of actuator 4 is communicated with the oil return pipe of reducing valve 3 through oil guide pipe, and the oil-in of reducing valve 3 is connected with electromagnetic valve group through pipeline; Said actuator 4 is connected with junction plate 7 through bulb connecting rod 6.
Operating principle of the present invention is visible by Fig. 1 and Fig. 2; The present invention includes speed governing processing controls mechanism and speed governing executing agency two parts; Adopt automatically controlled mode to adjust the aperture of output current with the control electromagnetic proportional valve of controller; Thereby the stroke of control actuator is to realize the control to the engine throttle size.
The present invention is in the debug phase; Instruction by controller 2 calls master control system starts self-setting function: the linear variable-current signal of controller 2 outputs, and control electromagnetic proportional valve 5 is opened gradually; Hydraulic oil drive controlling actuator 4 moves to range from minimum stroke; System obtains the characteristic curve of engine speed and controller output current, and converts related data into actuator output current numerical value and the corresponding two-dimension table of engine target rotating speed, is stored in the controller 2.
During the operate as normal speed-changing, controller 2 acquisition controlling knobs 1 input voltage value, and, confirm current state rotating speed desired value according to the proportionate relationship of gathering magnitude of voltage and total voltage value.Current values searched by controller 2 and the corresponding two-dimension table of engine target rotating speed is confirmed actuator electromagnetic proportional valve 5 input currents.The hydraulic oil that flows in actuator 4 fluid pressure drive devices is confirmed actuator 4 strokes according to proportioning valve 5 input current value after reducing pressure through reducing valve 3; Actuator 4 drives the motion of engine throttle rocking arm through bulb connecting rod 6, thereby realizes the control to engine speed.
This device is demarcated the minimum speed and the maximum (top) speed of motor respectively in the process that rotating speed is demarcated.The minimum value of knob 1 and maximum value be the minimum speed and the maximum (top) speed of corresponding motor respectively.In the increase process of knob 1 from the minimum to the maximum, the voltage signal of collection is continuously linear, thereby the output current of controller control ratio valve 8 also is continuously linear.Can realize the change of the continuous linearity of actuator 4 strokes.The final linear stepless speed change that realizes motor.
Claims (1)
1. hydraulic crawler excavator engine throttle electricity liquid composite control apparatus; Comprise controller, actuator, reducing valve and junction plate; Controller is provided with the voltage signal control handle, it is characterized in that the current signal output end of controller is connected with the electromagnetic proportional valve of actuator through lead, and the oil-in of said actuator is communicated with reducing valve through oil guide pipe; The oil return opening of actuator is communicated with the oil return pipe of reducing valve through oil guide pipe, and the oil-in of reducing valve is connected with electromagnetic valve group through pipeline; Said actuator is connected with junction plate through the bulb connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100257647A CN102535570A (en) | 2012-02-03 | 2012-02-03 | Electro-hydraulic integral control device for engine throttle of hydraulic digging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100257647A CN102535570A (en) | 2012-02-03 | 2012-02-03 | Electro-hydraulic integral control device for engine throttle of hydraulic digging machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102535570A true CN102535570A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100257647A Pending CN102535570A (en) | 2012-02-03 | 2012-02-03 | Electro-hydraulic integral control device for engine throttle of hydraulic digging machine |
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| CN (1) | CN102535570A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0404953B1 (en) * | 1988-07-29 | 1994-05-11 | Kabushiki Kaisha Komatsu Seisakusho | Controller of construction equipment |
| CN1222609A (en) * | 1998-12-01 | 1999-07-14 | 陕西中大机电设备有限责任公司 | Hydraulic drive system for towed vibrating road roller |
| CN1339659A (en) * | 2000-08-03 | 2002-03-13 | 株式会社小松制作所 | Engineering mechanism including fine regulation and operation mode |
| CN2756844Y (en) * | 2004-12-07 | 2006-02-08 | 大庆油田装备制造集团 | Pneumatic oil valve control system for pneumatic unloading bulk cement unloading vehicle |
| JP2007002755A (en) * | 2005-06-23 | 2007-01-11 | Shin Caterpillar Mitsubishi Ltd | Output control device for working machine |
| CN202131631U (en) * | 2011-05-17 | 2012-02-01 | 常林股份有限公司 | Energy saving controlling device of hydraulic excavator engine |
| CN202493347U (en) * | 2012-02-03 | 2012-10-17 | 山重建机(济宁)有限公司 | Electro-hydraulic comprehensive control device of engine throttle of hydraulic excavator |
-
2012
- 2012-02-03 CN CN2012100257647A patent/CN102535570A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0404953B1 (en) * | 1988-07-29 | 1994-05-11 | Kabushiki Kaisha Komatsu Seisakusho | Controller of construction equipment |
| CN1222609A (en) * | 1998-12-01 | 1999-07-14 | 陕西中大机电设备有限责任公司 | Hydraulic drive system for towed vibrating road roller |
| CN1339659A (en) * | 2000-08-03 | 2002-03-13 | 株式会社小松制作所 | Engineering mechanism including fine regulation and operation mode |
| CN2756844Y (en) * | 2004-12-07 | 2006-02-08 | 大庆油田装备制造集团 | Pneumatic oil valve control system for pneumatic unloading bulk cement unloading vehicle |
| JP2007002755A (en) * | 2005-06-23 | 2007-01-11 | Shin Caterpillar Mitsubishi Ltd | Output control device for working machine |
| CN202131631U (en) * | 2011-05-17 | 2012-02-01 | 常林股份有限公司 | Energy saving controlling device of hydraulic excavator engine |
| CN202493347U (en) * | 2012-02-03 | 2012-10-17 | 山重建机(济宁)有限公司 | Electro-hydraulic comprehensive control device of engine throttle of hydraulic excavator |
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Application publication date: 20120704 |