CN202493347U - Electro-hydraulic comprehensive control device of engine throttle of hydraulic excavator - Google Patents
Electro-hydraulic comprehensive control device of engine throttle of hydraulic excavator Download PDFInfo
- Publication number
- CN202493347U CN202493347U CN 201220036878 CN201220036878U CN202493347U CN 202493347 U CN202493347 U CN 202493347U CN 201220036878 CN201220036878 CN 201220036878 CN 201220036878 U CN201220036878 U CN 201220036878U CN 202493347 U CN202493347 U CN 202493347U
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- controller
- controlling element
- final controlling
- actuator
- hydraulic
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- Expired - Fee Related
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Abstract
The utility model discloses an electro-hydraulic comprehensive control device of an engine throttle of a hydraulic excavator. The device comprise a controller, an actuator, a reducing valve and a connecting plate, wherein a voltage signal control knob is arranged on the controller. The device is characterized in that a current signal output end of the controller is connected with an electromagnetic proportional valve of the actuator through leads, an oil inlet of the actuator is communicated with the reducing valve through an oil conduit, an oil returning port of the actuator is communicated with an oil returning pipe of the reducing valve through the oil conduit, an oil inlet of the reducing valve is connected with a magnetic valve group through pipelines, and the actuator is connected with the connecting plate through a ball head connecting rod. According to the device, the technical problems that the adjusting time is long, the device is unstable, the error is large and the reliability is poor in the prior art are solved.
Description
Technical field
The utility model belongs to hydraulic shovel engine control technical field, relates to the composite control apparatus of the electric and hydraulic system of hydraulic shovel engine throttle, is specifically related to a kind of hydraulic shovel engine throttle electricity liquid composite control apparatus.
Background technique
Traditional hydraulic shovel throttle control system 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 controlling 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 amount 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 amount of throttle motor during speed governing.
Existing technology all adopts closed loop control mode, depends on current speed or position signal, 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 speed control system generation mechanical failure, can not effectively protect, be prone to cause the damage of throttle motor and control wiring, reduced the reliability of system.
Summary of the invention
The purpose of the utility model be solve existing technology exist system exist the adjustment time long, unstable, error is big and the technical problem of poor reliability, and a kind of hydraulic shovel engine throttle electricity liquid composite control apparatus is provided.
The utility model hydraulic shovel engine throttle electricity liquid composite control apparatus; Comprise controller, final controlling element, reduction valve and connecting 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 final controlling element through lead, and the filler opening of said final controlling element is communicated with reduction valve through oil guide pipe; The return opening of final controlling element is communicated with the return tube of reduction valve through oil guide pipe, and the filler opening of reduction valve is connected with electromagnetic valve group through pipeline; Said final controlling element is connected with connecting plate through the bulb connecting rod.
The utility model solved existing technology exist system exist adjustment time long, unstable, error is big and the technical problem of poor reliability.
Description of drawings
Fig. 1 is the utility model structural principle schematic representation;
Fig. 2 is the utility model final controlling element and connecting plate linkage structure schematic representation.
Among the figure 1, control handle 2, controller 3, reduction valve 4, final controlling element 5, electromagnetic proportional valve 6, bulb connecting rod 7, connecting plate
Embodiment
According to Fig. 1 and Fig. 2; The utility model hydraulic shovel engine throttle electricity liquid composite control apparatus; Comprise controller 2, final controlling element 4, reduction valve 3 and connecting 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 final controlling element 4 through lead, and the filler opening of said final controlling element 4 is communicated with reduction valve 3 through oil guide pipe; The return opening of final controlling element 4 is communicated with the return tube of reduction valve 3 through oil guide pipe, and the filler opening of reduction valve 3 is connected with electromagnetic valve group through pipeline; Said final controlling element 4 is connected with connecting plate 7 through bulb connecting rod 6.
The working principle of the utility model is visible by Fig. 1 and Fig. 2; The utility model comprises speed governing processing control mechanism and speed governing actuator two-part; Adopt automatically controlled mode to adjust the aperture of output current with the control electromagnetic proportional valve of controller; Thereby the stroke of control final controlling element is to realize the control to the engine throttle size.
The utility model 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 final controlling element 4 moves to range from minimum stroke; System obtains the characteristic curve of engine speed and controller output current, and converts related data into final controlling element output current numerical value and the corresponding two-dimension table of engine target rotating speed, is stored in the controller 2.
During the proper functioning 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.Controller 2 searches current values and the corresponding two-dimension table of engine target rotating speed is confirmed final controlling element electromagnetic proportional valve 5 input currents.The hydraulic oil that flows in final controlling element 4 fluid pressure drive devices is confirmed final controlling element 4 strokes according to Proportional valve 5 input current value after reducing pressure through reduction valve 3; Final controlling element 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 final controlling element 4 strokes.The final linear stepless speed change that realizes motor.
Claims (1)
1. hydraulic shovel engine throttle electricity liquid composite control apparatus; Comprise controller, final controlling element, reduction valve and connecting 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 final controlling element through lead, and the filler opening of said final controlling element is communicated with reduction valve through oil guide pipe; The return opening of final controlling element is communicated with the return tube of reduction valve through oil guide pipe, and the filler opening of reduction valve is connected with electromagnetic valve group through pipeline; Said final controlling element is connected with connecting plate through the bulb connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220036878 CN202493347U (en) | 2012-02-03 | 2012-02-03 | Electro-hydraulic comprehensive control device of engine throttle of hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220036878 CN202493347U (en) | 2012-02-03 | 2012-02-03 | Electro-hydraulic comprehensive control device of engine throttle of hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202493347U true CN202493347U (en) | 2012-10-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220036878 Expired - Fee Related CN202493347U (en) | 2012-02-03 | 2012-02-03 | Electro-hydraulic comprehensive control device of engine throttle of hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202493347U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535570A (en) * | 2012-02-03 | 2012-07-04 | 山重建机(济宁)有限公司 | Electro-hydraulic integral control device for engine throttle of hydraulic digging machine |
-
2012
- 2012-02-03 CN CN 201220036878 patent/CN202493347U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535570A (en) * | 2012-02-03 | 2012-07-04 | 山重建机(济宁)有限公司 | Electro-hydraulic integral control device for engine throttle of hydraulic digging machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20150203 |
|
| EXPY | Termination of patent right or utility model |