CN202440871U - Control system for preventing oil cylinder of hydraulic excavator from empty suction - Google Patents
Control system for preventing oil cylinder of hydraulic excavator from empty suction Download PDFInfo
- Publication number
- CN202440871U CN202440871U CN2012200497684U CN201220049768U CN202440871U CN 202440871 U CN202440871 U CN 202440871U CN 2012200497684 U CN2012200497684 U CN 2012200497684U CN 201220049768 U CN201220049768 U CN 201220049768U CN 202440871 U CN202440871 U CN 202440871U
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- rotating speed
- control system
- oil cylinder
- engine
- oil
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Abstract
The utility model discloses a control system for preventing an oil cylinder of a hydraulic excavator from empty suction. The control system is characterized in that a pressure sensor is arranged in a pilot control oil way; an engine rotating speed sensor is arranged above the flywheel shell of an engine; when the oil pressure value, obtained by the pressure sensor, of the pilot control oil way is higher than a pressure set value P1, and the engine rotating speed obtained by the engine rotating speed senor is lower than the lower limit rotating speed set value N1, a controller controls the engine rotating speed to be improved to the upper limit rotating speed set value N2 through a throttle executor, wherein the N2 is greater than the N1. By using the control system for preventing the oil cylinder of the hydraulic excavator from empty suction, a bucket arm oil cylinder can be prevented from empty suction effectively; the phenomenon of arm drop of a bucket arm is eliminated; and the use safety is improved.
Description
Technical field
The utility model relates to a kind of hydraulic crawler excavator and controls system, more specifically says so to be used to prevent the empty control system of hydraulic excavating Oil cylinder suction.
Background technology
Hydraulic crawler excavator mainly is to excavate work through dipper excavation and scraper bowl.Under the underloading pattern during motor tick-over, dipper since deadweight descend.Less because of the Main Hydraulic Pump flow, this moment, the fuel delivery of Main Hydraulic Pump satisfied not the demand of bucket arm cylinder, and it is empty to cause bucket arm cylinder to be inhaled, and makes dipper produce reciprocally swinging, is commonly called as arm phenomenon.Fall arm phenomenon and can directly bring potential safety hazard, and possibly cause the damage of Hydraulic Elements.Existent method is in dipper rod chamber oil return circuit, to reduce the throttle orifice diameter, improves back pressure, reduces the dipper decrease speed, makes oil cylinder not inhale sky.But the power loss when this method has increased work simultaneously, cause engine fuel consumption to increase.
Summary of the invention
The utility model is for avoiding above-mentioned existing in prior technology weak point, provide a kind of hydraulic excavating Oil cylinder that prevents to inhale empty control system, to improve safety, avoiding Hydraulic Elements because oil cylinder is inhaled sky and cause damage.
The utility model adopts following technical scheme for the technical solution problem:
The utility model prevents that the characteristics of the control system that the suction of hydraulic excavating Oil cylinder is empty from being: a pressure sensor is set in guide's control oil channel, and the place is provided with an engine speed sensor in the flywheel shell of engine top position; The oil liquid pressure value is higher than pressure set points P in the guide's control oil channel that obtains being detected by pressure sensor
1, and be lower than rotating speed lower limit set value N by the engine speed that engine speed sensor detect to obtain
1The time, improve engine speed to rotating speed upper limit set value N by controller through throttle actuator
2, N
2＞N
1Further, said N
2=(1.15-1.3) N
1
Compared with present technology, the utility model beneficial effect is embodied in:
1, the utility model is to increase the Main Hydraulic Pump flow to improve engine speed, thereby guarantees the fuel delivery of bucket arm cylinder, and it is empty effectively to have avoided bucket arm cylinder to inhale; Thereby eliminate the arm phenomenon of falling of dipper, improve safety in utilization.
Oil return circuit back pressure when 2, the utility model does not increase work, thereby the increase of oil consumption when not bringing work;
3, the utility model can make excavator action softer, drives comfortablely, more possesses hommization.
Description of drawings
Fig. 1 is the utility model control principle figure.
Label among the figure: 1 main valve; 2 choke valves; 3 bucket arm cylinders.
The specific embodiment
Referring to Fig. 1, in the present embodiment, prevent that the empty control system of hydraulic excavating Oil cylinder suction is provided with a pressure sensor in guide's control oil channel, the place is provided with an engine speed sensor in the flywheel shell of engine top position; The oil liquid pressure value is higher than pressure set points P in the guide's control oil channel that obtains being detected by pressure sensor
1, and be lower than rotating speed lower limit set value N by the engine speed that engine speed sensor detect to obtain
1The time, improve engine speed to rotating speed upper limit set value N by controller through throttle actuator
2, N
2＞N
1
In the practical implementation, be provided with: N
2=(1.15-1.3) N
1
To the RS360 hydraulic crawler excavator, when guide's control oil channel upward pressure sensor detected dipper excavation action, promptly the oil liquid pressure in guide's control oil channel was higher than 10bar, passed through the rotating speed of engine speed sensor detection of engine simultaneously; If the engine speed of this moment is less than 1200RPM, through setting program control throttle actuator, the rotating speed that improves motor with this flow that increases pump, efficiently solves the empty problem of suction of bucket arm cylinder 3 to 1400RPM by controller.
Claims (2)
1. one kind prevents the empty control system of hydraulic excavating Oil cylinder suction, and it is characterized in that: a pressure sensor is set in guide's control oil channel, and the place is provided with an engine speed sensor in the flywheel shell of engine top position; The oil liquid pressure value is higher than pressure set points P in the guide's control oil channel that obtains being detected by pressure sensor
1, and be lower than rotating speed lower limit set value N by the engine speed that engine speed sensor detect to obtain
1The time, improve engine speed to rotating speed upper limit set value N by controller through throttle actuator
2, N
2＞N
1
2. the hydraulic excavating Oil cylinder that prevents according to claim 1 is inhaled empty control system, it is characterized in that said N
2=(1.15-1.3) N
1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200497684U CN202440871U (en) | 2012-02-16 | 2012-02-16 | Control system for preventing oil cylinder of hydraulic excavator from empty suction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200497684U CN202440871U (en) | 2012-02-16 | 2012-02-16 | Control system for preventing oil cylinder of hydraulic excavator from empty suction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202440871U true CN202440871U (en) | 2012-09-19 |
Family
ID=46822325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200497684U Expired - Fee Related CN202440871U (en) | 2012-02-16 | 2012-02-16 | Control system for preventing oil cylinder of hydraulic excavator from empty suction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202440871U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661109A (en) * | 2018-05-31 | 2018-10-16 | 马鞍山松鹤信息科技有限公司 | A kind of working state of excavator monitoring method |
| CN108661108A (en) * | 2018-05-30 | 2018-10-16 | 马鞍山松鹤信息科技有限公司 | A kind of excavator with detection function |
| CN114561986A (en) * | 2022-02-21 | 2022-05-31 | 徐州徐工挖掘机械有限公司 | Control method for actively preventing bucket rod from being sucked empty |
-
2012
- 2012-02-16 CN CN2012200497684U patent/CN202440871U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661108A (en) * | 2018-05-30 | 2018-10-16 | 马鞍山松鹤信息科技有限公司 | A kind of excavator with detection function |
| CN108661109A (en) * | 2018-05-31 | 2018-10-16 | 马鞍山松鹤信息科技有限公司 | A kind of working state of excavator monitoring method |
| CN114561986A (en) * | 2022-02-21 | 2022-05-31 | 徐州徐工挖掘机械有限公司 | Control method for actively preventing bucket rod from being sucked empty |
| CN114561986B (en) * | 2022-02-21 | 2023-02-03 | 徐州徐工挖掘机械有限公司 | Control method for actively preventing bucket rod from being sucked empty |
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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: 20120919 Termination date: 20180216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |