CN201301467Y - Integrated hydraulic and electronic control system for hydraulic excavator - Google Patents
Integrated hydraulic and electronic control system for hydraulic excavator Download PDFInfo
- Publication number
- CN201301467Y CN201301467Y CNU2008200967734U CN200820096773U CN201301467Y CN 201301467 Y CN201301467 Y CN 201301467Y CN U2008200967734 U CNU2008200967734 U CN U2008200967734U CN 200820096773 U CN200820096773 U CN 200820096773U CN 201301467 Y CN201301467 Y CN 201301467Y
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- 239000000446 fuel Substances 0.000 claims description 19
- 239000000523 sample Substances 0.000 claims description 9
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 21
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000002950 deficient Effects 0.000 description 3
- 239000010727 cylinder oil Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
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Abstract
The utility model discloses an integrated hydraulic and electronic control system for a hydraulic excavator, belonging to a hydraulic excavator and aiming at providing an electronic control hydraulic system for a hydraulic excavator. The integrated hydraulic and electronic control system comprises a main pump driven by an engine, a hydraulic main valve communicated with the pump, and oil pump adjustors connected at the oil outlet of the pump after being connected in parallel. After being connected in parallel, the other ends of the two oil pump adjustors are electrically connected with a controller(7)through an electromagnetic proportional valve(5), and a pressure sensor(3)is electrically connected with the controller(7). A rotation speed sensor(6)and two throttle lever angle sensors(9), which are electrically connected with the controller(7), are arranged on an engine(8); and the controller(7)is electrically connected with the throttle lever angle sensors(9)through a DC electromotor(10). The integrated hydraulic and electronic control system can automatically realize reasonable matching between the hydraulic pressure of the engine and the main pump and has the advantages of high utility ratio of the power of the engine and low oil consumption. The integrated hydraulic and electronic control system is applicable for various hydraulic excavators.
Description
Technical field:
The utility model relates to a kind of hydraulic crawler excavator, relates in particular to a kind of electronically controlled hydraulic system of hydraulic crawler excavator.
Background technology:
At present, the hydraulic pressure main pump discharge capacity of most of homemade hydraulic crawler excavators and the coupling between the engine speed generally are that parameter such as pressure, flow by manual adjustments hydraulic oil realizes; Troublesome poeration not only, and cause owing to the matching effect between hydraulic pressure main pump discharge capacity and the engine speed is undesirable that the engine power utilization rate is not high, operating efficiency is low, oil consumption is big, defective such as the suffered shock loading of motor, Hydraulic Elements and excavation member is big.Make a concrete analysis of as follows:
1) when hydraulic crawler excavator runs into hard thing in construction operation,, shovel make hydraulic crawler excavator be in the overload operation state owing to digging the resistance increase.At this moment, the action of executive component slows down and causes oil return also slack-off thereupon, but main pump still continues the fuel feeding to system, so in-oil cylinder oil pressure sharply rises and cause system pressure excessive; Because the output torque of motor is less than at this moment working resistance, so motor begins to occur overload operation, and rotating speed descends rapidly, even " stopping working ".At this moment if dependence widens the rotating speed that throttle improves motor rigidly, the spill losses meeting is very big, even can make oil circuit because of the excessive leakage of oil of pressure; In addition, when load is big especially,, can't improve rotating speed by regulating throttle again because throttle has been in maximum position.
2) load as if unexpected when motor turns round under high idle speed, motor can not in time be caught up with because of fuel delivery and is with not dynamic load, so rotating speed decline rapidly; When rotating speed descends the back fuel delivery when beginning to increase and since the hysteresis rotating speed of flywheel rise to the time of rated speed can be long, thereby cause fuel consumption to increase.
Summary of the invention:
At the above-mentioned defective that exists in the prior art, the utility model aims to provide a kind of hydraulic crawler excavator hydraulic pressure and Electronic Control integrated system, it can realize the reasonable coupling between engine speed and the main pump, improve engine power utilization rate, reduction oil consumption thereby reach, and the purpose that reduces suffered shock loading.
To achieve these goals, the utility model by the following technical solutions: two fuel pump governors that are connected to two oil-out places of main pump after main pump, the hydraulic pressure main valve that is communicated with this main pump and the parallel connection that it comprises motor, driven by this motor; Be electrically connected with controller by electromagnetic proportional valve after the other end parallel connection of two fuel pump governors, two pressure sensors that are communicated with main pump separately are electrically connected with controller; Accelerator rod maximum position and minimum position place at motor respectively are provided with a Thrust Level Angel sensor that is electrically connected with controller, are provided with the speed probe that is electrically connected with controller at the flywheel place of motor; Controller is connected with each Thrust Level Angel sensor electrical by dc motor.
In technique scheme, the effect of pressure sensor is an oil pressure of gathering main pump, and passes to controller after changing this pressure signal into the signal of telecommunication; The effect of fuel pump governor is a fuel delivery of regulating main pump according to the pressure signal of electromagnetic proportional valve output; The effect of electromagnetic proportional valve is to change the signal of telecommunication that controller sends into pressure signal, and according to this pressure signal fuel pump governor is controlled; Speed probe is used to gather the rotating speed of engine flywheel, and changes this tach signal into the signal of telecommunication and give controller; The Thrust Level Angel sensor is used to gather the angle position of engine throttle pull bar, and changes this position signalling into the signal of telecommunication and give controller; The effect of controller is that the signal with pressure sensor, speed probe and Thrust Level Angel sensor acquisition compares and judges, then to dc motor and (or) electromagnetic proportional valve sends control instruction, by dc motor the accelerator rod of motor is regulated control, and fuel pump governor is regulated control by electromagnetic proportional valve, thereby realize the reasonable coupling of engine speed and main pump pump oil mass, reach the purpose that improves the acc power utilization rate, reduces oil consumption.
Compared with the prior art, therefore the utility model can realize the reasonable coupling between engine speed and the main pump pump oil mass automatically owing to adopted technique scheme, have simple to operate, advantage such as engine power utilization rate height, oil consumption are low; Make a concrete analysis of as follows:
1) when throttle is in maximum position, controller sends control instruction to electromagnetic proportional valve, the flow that electromagnetic proportional valve is regulated hydraulic oil automatically by fuel pump governor reduces the pressure of system, reduces the absorption of main oil pump to engine power, thereby reduces the output torque of oil pump; Even if oil return this moment is slack-off, the pump oil mass of main pump also can reduce simultaneously, and in-oil cylinder oil pressure is just not too large, and the pressure of system also will alleviate, thereby reduce the load of motor; Not only thoroughly overcome the defective that motor " stops working ", and motor still can keep the specified rotating speed of deciding, effective power is brought into play to greatest extent.
2) when speed probe detected engine speed and is lower than rated speed, electromagnetic proportional valve began to control the discharge capacity of main pump, reduces engine loading, shortened the time that engine speed rises to rated speed; Adjust interior fuel consumption of time thereby reduced motor, improved operating efficiency.In addition, pressure sensor can detect the oil pressure of main pump in real time, when unexpected loading rear engine rotating speed was lower than rated speed because of inertia lag does not also drop to, pressure signal just produced, and the discharge capacity of main pump is controlled by fuel pump governor according to the pressure signal electromagnetic proportional valve; Because the transmission speed of pressure signal is very fast, therefore can reduce load in advance, further reduce fuel consumption and improve operating efficiency.Control to engine speed and to the automatic adjusting of main pump discharge capacity by above-mentioned, can realize the reasonable coupling between engine speed and the main pump oil drain quantity, improve the power utilization of motor.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Among the figure: hydraulic pressure main valve 1 main pump 2 pressure sensors 3 fuel pump governors 4 electromagnetic proportional valves 5 speed probes 6 controllers 7 motors 8 Thrust Level Angel sensors 9 dc motors 10
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment:
As shown in Figure 1: main pump 2 is driven by motor 8, and two oil-outs of main pump 2 are communicated with hydraulic pressure main valve 1 by oil pipe; Be connected to two oil-out places of main pump 2 after the adjusting port parallel connection of two fuel pump governors 4, be communicated with electromagnetic proportional valve 5 by oil duct after the control port parallel connection of two fuel pump governors 4, this electromagnetic proportional valve is electrically connected with controller 7 by lead; Two pressure sensors 3 are communicated with main pump 2 by oil pipe separately, and each pressure sensor 3 is electrically connected with controller 7 by lead; Maximum position and minimum position place at motor 8 accelerator rods respectively are provided with a Thrust Level Angel sensor 9, and each Thrust Level Angel sensor 9 is electrically connected with controller 7 by lead; Flywheel place at motor 8 is provided with speed probe 6, and this speed probe is electrically connected with control 7 by lead; Controller 7 is connected with two Thrust Level Angel sensors 9 by dc motor 10.In the present embodiment, dc motor 10 is a DC permanet-magnet servomotor, and speed probe 6 is a magnetoelectric tachometric transducer, and Thrust Level Angel sensor 9 is an inductive position sensor, main pump 2 is a duplex pump, and pressure sensor 3 has the function that can directly provide the hydraulic pressure signal.
Claims (1)
1. hydraulic crawler excavator hydraulic pressure and Electronic Control integrated system are connected to two fuel pump governors at two oil-out places of main pump after main pump, the hydraulic pressure main valve that is communicated with this main pump and the parallel connection that comprise motor, is driven by this motor; It is characterized in that: be electrically connected with controller (7) by electromagnetic proportional valve (5) after the other end parallel connection of two fuel pump governors (4), two pressure sensors (3) that are communicated with main pump (2) separately are electrically connected with controller (7); Accelerator rod maximum position and minimum position place at motor (8) respectively are provided with a Thrust Level Angel sensor (9) that is electrically connected with controller (7), are provided with the speed probe (6) that is electrically connected with controller (7) at the flywheel place of motor (8); Controller (7) is electrically connected with each Thrust Level Angel sensor (9) by dc motor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200967734U CN201301467Y (en) | 2008-11-13 | 2008-11-13 | Integrated hydraulic and electronic control system for hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200967734U CN201301467Y (en) | 2008-11-13 | 2008-11-13 | Integrated hydraulic and electronic control system for hydraulic excavator |
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| Publication Number | Publication Date |
|---|---|
| CN201301467Y true CN201301467Y (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200967734U Expired - Fee Related CN201301467Y (en) | 2008-11-13 | 2008-11-13 | Integrated hydraulic and electronic control system for hydraulic excavator |
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| Country | Link |
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| CN (1) | CN201301467Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818508A (en) * | 2010-04-19 | 2010-09-01 | 三一重机有限公司 | Power control system and method of excavator |
| CN102251546A (en) * | 2011-06-14 | 2011-11-23 | 三一重机有限公司 | Control method for reducing oil consumption of excavator engine |
| CN102418354A (en) * | 2011-10-28 | 2012-04-18 | 华侨大学 | Drive system of hybrid hydraulic excavator based on pump/motor |
| CN102635137A (en) * | 2011-02-12 | 2012-08-15 | 上海派芬自动控制技术有限公司 | Total power control system of mechanical equipment |
| CN102758464A (en) * | 2012-07-09 | 2012-10-31 | 徐州徐工挖掘机械有限公司 | Method for controlling positive-flow hydraulic system of excavator |
| CN104326365A (en) * | 2014-11-24 | 2015-02-04 | 徐州重型机械有限公司 | Energy-saving control method and system for crane |
| CN104373332A (en) * | 2014-10-28 | 2015-02-25 | 浙江三一装备有限公司 | Main pump power control system and method and engineering machine |
| CN109778940A (en) * | 2019-03-13 | 2019-05-21 | 徐州徐工矿业机械有限公司 | A kind of transient power coalignment and matching process improving large excavator performance |
-
2008
- 2008-11-13 CN CNU2008200967734U patent/CN201301467Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818508A (en) * | 2010-04-19 | 2010-09-01 | 三一重机有限公司 | Power control system and method of excavator |
| CN102635137A (en) * | 2011-02-12 | 2012-08-15 | 上海派芬自动控制技术有限公司 | Total power control system of mechanical equipment |
| CN102251546A (en) * | 2011-06-14 | 2011-11-23 | 三一重机有限公司 | Control method for reducing oil consumption of excavator engine |
| CN102251546B (en) * | 2011-06-14 | 2013-04-24 | 三一重机有限公司 | Control method for reducing oil consumption of excavator engine |
| CN102418354A (en) * | 2011-10-28 | 2012-04-18 | 华侨大学 | Drive system of hybrid hydraulic excavator based on pump/motor |
| CN102418354B (en) * | 2011-10-28 | 2013-09-18 | 华侨大学 | Pump/motor-based parallel-series hybrid hydraulic excavator driving system |
| CN102758464A (en) * | 2012-07-09 | 2012-10-31 | 徐州徐工挖掘机械有限公司 | Method for controlling positive-flow hydraulic system of excavator |
| CN102758464B (en) * | 2012-07-09 | 2014-11-12 | 徐州徐工挖掘机械有限公司 | Method for controlling positive-flow hydraulic system of excavator |
| CN104373332A (en) * | 2014-10-28 | 2015-02-25 | 浙江三一装备有限公司 | Main pump power control system and method and engineering machine |
| CN104326365A (en) * | 2014-11-24 | 2015-02-04 | 徐州重型机械有限公司 | Energy-saving control method and system for crane |
| CN104326365B (en) * | 2014-11-24 | 2016-10-05 | 徐州重型机械有限公司 | Energy-saving control method and system for crane |
| CN109778940A (en) * | 2019-03-13 | 2019-05-21 | 徐州徐工矿业机械有限公司 | A kind of transient power coalignment and matching process improving large excavator performance |
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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: 20090902 Termination date: 20151113 |
|
| EXPY | Termination of patent right or utility model |