CN203462513U - Negative-flow energy-saving device of hydraulic excavator - Google Patents
Negative-flow energy-saving device of hydraulic excavator Download PDFInfo
- Publication number
- CN203462513U CN203462513U CN201320505766.6U CN201320505766U CN203462513U CN 203462513 U CN203462513 U CN 203462513U CN 201320505766 U CN201320505766 U CN 201320505766U CN 203462513 U CN203462513 U CN 203462513U
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- valve
- pump
- negative
- main
- main pump
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- 239000003921 oil Substances 0.000 claims abstract description 17
- 239000010724 circulating oil Substances 0.000 claims abstract description 4
- 239000002243 precursor Substances 0.000 claims description 5
- 239000002828 fuel tank Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
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- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a negative-flow energy-saving device of a hydraulic excavator. The negative-flow energy-saving device comprises a main pump and a main valve which are communicated with each other through an oil path. The main pump is communicated with a pilot pump through an oil path. The main pump and the pilot pump are communicated with an oil tank through an oil path. The pilot pump is communicated with the main valve through a pilot overflow valve. The negative-flow energy-saving device is characterized in that a pressure sensor which is connected with an electronic controller is arranged on the main pump, and the two ends of the electronic controller are respectively connected with an electromagnetic valve and an electromagnetic proportional pressure relief valve; a negative-flow outlet of the main valve is connected with an inlet end of the electromagnetic valve, an outlet end of the electromagnetic valve is respectively connected with an outlet end of the electromagnetic proportional pressure relief valve and an oil outlet end of a negative-flow regulator and the negative-flow regulator is connected with the main pump; the inlet end of the electromagnetic proportional pressure relief valve is connected with the outlet end of the pilot pump, and a throttling valve is arranged on a circulating oil path of the main valve. The negative-flow energy-saving device of the hydraulic excavator solves the technical problems of high power loss, low energy utilization ratio, poor reliability and serious waste existing in the prior art.
Description
technical fieldthe utility model belongs to hydraulic excavator saving energy device technique field, is specifically related to a kind of hydraulic crawler excavator minus flow energy saver.
background technologyin prior art, hydraulic crawler excavator is a kind of multi-functional mechanical, is widely used in hydraulic engineering, and communications and transportation, in the mechanical executions such as power engineering and mine excavation, has alleviated heavy manual labor greatly, has guaranteed the quality of engineering; Can there are various forms of power losses, the use power of meeting reduction excavator hydraulic system in various degree in hydraulic crawler excavator hydraulic system in work engineering; Because excavator load variations is larger, operating conditions varies, so the power of hydraulic system changes also very greatly; Hydraulic crawler excavator adopts power-saving technology can not only effectively reduce fuel consumption, can also reduce the power loss of hydraulic system, improve the utilization rate of engine power, make dynamical system and load required better coupling, thereby reduce the working strength of motor and Hydraulic Elements, the heating of minimizing system, the normal reliability of using of raising equipment; The hydraulic crawler excavator of prior art often adopts minus flow to control power-saving technology, when surpassing power, rises after tune point pressure system pressure, system enters approximate constant power state of a control, it is pressure * flow=constant, to keep hydraulic system power to be no more than engine output, reach motor not flame-out object all the time, but the increase along with live load, when pressure is elevated to relief valve set pressure, have a large amount of hydraulic oil by overflow valve overflow, be transformed into heat and cause energy loss, more macro-energy loss is larger for power.
summary of the inventionthe purpose of this utility model be solve that prior art exists that power loss is large, energy utilization rate is low, poor reliability and the serious technical problem of waste, provide a kind of hydraulic crawler excavator minus flow energy saver, to overcome the deficiencies in the prior art.
To achieve these goals, a kind of hydraulic crawler excavator minus flow of the utility model energy saver, it comprises main pump and the main valve being interconnected by oil circuit; Described main pump is communicated with pioneer pump by oil circuit, and described main pump and pioneer pump are communicated with fuel tank by oil circuit, and described pioneer pump is interconnected by precursor overflow valve and main valve; Its main points are that described main pump is provided with and the interconnective pressure sensor of electronic controller, and the two ends of described electronic controller are connected with solenoid-operated proportional reducing valve with electromagnetic valve respectively; The minus flow outlet of described main valve is connected with the arrival end of electromagnetic valve, and the port of export of described electromagnetic valve is connected with the port of export of solenoid-operated proportional reducing valve and the hydraulic fluid port end of minus flow adjuster respectively, and described minus flow adjuster and main pump interconnect; The arrival end of described solenoid-operated proportional reducing valve is connected with the port of export of pioneer pump, and the circulating oil path of described main valve is provided with choke valve.
The utility model is rational in infrastructure, novel in design, because electronic controller can be controlled electromagnetic valve, cut off minus flow oil circuit control, and control solenoid-operated proportional reducing valve and open, thereby the pressure of minus flow adjuster is raise, and main pump delivery reduces, and power loss is little, can not waste fuel and good reliability, system stability.The utility model has solved that prior art exists that power loss is large, energy utilization rate is low, poor reliability and the serious technical problem of waste.
accompanying drawing explanationaccompanying drawing is structural principle schematic diagram of the present utility model.
In figure 1, main pump 2, minus flow adjuster 3, solenoid-operated proportional reducing valve 4, electronic controller 5, electromagnetic valve 6, main valve 7, choke valve 8, precursor overflow valve 9, pioneer pump 10, fuel tank 11, pressure sensor
the specific embodimentwith reference to accompanying drawing, it comprises main pump 1 and the main valve 6 being interconnected by oil circuit the utility model; Described main pump 1 is communicated with pioneer pump 9 by oil circuit; Described main pump 1 and pioneer pump 9 are communicated with fuel tank 10 by oil circuit respectively; Described pioneer pump 9 is interconnected by precursor overflow valve 8 and main valve 6; Described main pump 1 is provided with and the interconnective pressure sensor 11 of electronic controller 4; The two ends of described electronic controller 4 are connected with solenoid-operated proportional reducing valve 3 with electromagnetic valve 5 respectively; The minus flow outlet of described main valve 6 is connected with the arrival end of electromagnetic valve 5; The port of export of described electromagnetic valve 5 is connected with the port of export of solenoid-operated proportional reducing valve 3 and the hydraulic fluid port end of minus flow adjuster 2 respectively; Described minus flow adjuster 2 interconnects with main pump 1; The arrival end of described solenoid-operated proportional reducing valve 3 is connected with the port of export of pioneer pump 9, and the circulating oil path of described main valve is provided with choke valve 7.
Operating principle: when system is unloaded, electromagnetic valve 5 is in normally open, and the minus flow pressure producing under the effect of choke valve 7, is applied on minus flow adjuster 2 through minus flow outlet, electromagnetic valve 5, and now the discharge capacity of main pump 1 is minimum; When main pump 1 load increases, in main valve 6, oil circuit is cut off, minus flow outlet pressure is minimum, it is maximum that main pump 1 discharge capacity reaches, and when reaching preset pressure, electronic controller 4 sends instruction and makes electromagnetic valve 5 actions, cut off minus flow oil circuit control, then electronic controller 4 control solenoid-operated proportional reducing valve 3 are opened, and the pressure of minus flow adjuster 2 is raise, and main pump 1 discharge capacity reduces; When reaching the default pressure of precursor overflow valve, electronic controller 4 sends instruction, controls solenoid-operated proportional reducing valve 3 output maximum pressures, makes the discharge capacity of main pump 1 minimum, to realize, reduces power loss, energy-conservation object.Electromagnetic valve 5 of the present utility model is open in usual, closed in electrified state; Solenoid-operated proportional reducing valve 3 is normally closed type, and the pressure of exporting during energising changes with the variation of electric current.
Of the present utility model rational in infrastructure, can effectively reduce the power loss of hydraulic crawler excavator, improved the utilization rate of the energy, reduced pollution and stability is high, the good hand touch of operation.
Claims (1)
1. a hydraulic crawler excavator minus flow energy saver, it comprises main pump and the main valve being interconnected by oil circuit; Described main pump is communicated with pioneer pump by oil circuit, and described main pump and pioneer pump are communicated with fuel tank by oil circuit, and described pioneer pump is interconnected by precursor overflow valve and main valve; It is characterized in that described main pump is provided with and the interconnective pressure sensor of electronic controller, the two ends of described electronic controller are connected with solenoid-operated proportional reducing valve with electromagnetic valve respectively; The minus flow outlet of described main valve is connected with the arrival end of electromagnetic valve, and the port of export of described electromagnetic valve is connected with the port of export of solenoid-operated proportional reducing valve and the hydraulic fluid port end of minus flow adjuster respectively, and described minus flow adjuster and main pump interconnect; The arrival end of described solenoid-operated proportional reducing valve is connected with the port of export of pioneer pump, and the circulating oil path of described main valve is provided with choke valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505766.6U CN203462513U (en) | 2013-08-19 | 2013-08-19 | Negative-flow energy-saving device of hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505766.6U CN203462513U (en) | 2013-08-19 | 2013-08-19 | Negative-flow energy-saving device of hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203462513U true CN203462513U (en) | 2014-03-05 |
Family
ID=50174886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320505766.6U Expired - Fee Related CN203462513U (en) | 2013-08-19 | 2013-08-19 | Negative-flow energy-saving device of hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203462513U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452162A (en) * | 2013-08-19 | 2013-12-18 | 山重建机有限公司 | Negative-flow energy saving device of hydraulic excavator |
| CN104153406A (en) * | 2014-08-05 | 2014-11-19 | 山河智能装备股份有限公司 | Excavator with function of switching oil hydraulic circuit according to different working conditions |
-
2013
- 2013-08-19 CN CN201320505766.6U patent/CN203462513U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452162A (en) * | 2013-08-19 | 2013-12-18 | 山重建机有限公司 | Negative-flow energy saving device of hydraulic excavator |
| CN104153406A (en) * | 2014-08-05 | 2014-11-19 | 山河智能装备股份有限公司 | Excavator with function of switching oil hydraulic circuit according to different working conditions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20150819 |
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| EXPY | Termination of patent right or utility model |