CN201944036U - Energy-conservation hydraulic system for loader - Google Patents
Energy-conservation hydraulic system for loader Download PDFInfo
- Publication number
- CN201944036U CN201944036U CN2010206891191U CN201020689119U CN201944036U CN 201944036 U CN201944036 U CN 201944036U CN 2010206891191 U CN2010206891191 U CN 2010206891191U CN 201020689119 U CN201020689119 U CN 201020689119U CN 201944036 U CN201944036 U CN 201944036U
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- pump
- loader
- hydraulic system
- energy
- valve
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Abstract
The utility model discloses an energy-conservation hydraulic system for a loader, which comprises an oil tank, a pump, a variable cylinder, a pressure-compensated valve, a flow-compensated valve, a diverter, a throttling port, a motor and a swash plate and belongs to the technical field of hydraulic equipment. The energy-conservation hydraulic system for the loader is characterized by adopting a pump control system with sensitive loads. Therefore, the energy-conservation hydraulic system for the loader enables a steering pump to supply oil properly as required by the diverter, avoids overflow loss of surplus flow during operation, reduces high volume loss of unloading, accordingly reduces power loss of the hydraulic system, improves the whole working efficiency of the loader and has wide market prospects.
Description
Technical field
The utility model relates to a kind of loader energy-saving hydraulic system, belongs to the hydraulic pressure installation technical field.
Background technique
In the prior art, loader is as the instrument that reduces labor strength, increases work efficiency and finish high-power engineering construction, and efficient is its important performance index.Present loader quantitative system, when engine running, the output flow of oil hydraulic pump is almost irrelevant with ambient pressure, constant always fuel feeding, thereby the residual flow spill losses when causing the big flow loss of off-load when not turning to and turning to work, greatly reduce the working efficiency of loader hydraulic system, and cause the unnecessary energy consumption of system.
Thereby how to overcome the above-mentioned deficiency of existing loader hydraulic system, become the technical barrier that those skilled in the art need to be resolved hurrily.
Summary of the invention
The utility model is intended to propose a kind of loader energy-saving hydraulic system, and it has overcome above-mentioned deficiency by structural improvement, has improved the working efficiency of loader hydraulic system effectively, has reduced energy consumption, has saved the energy.
This loader energy-saving hydraulic system mainly comprises: fuel tank, pump, the variable oil cylinder, pressure-compensated valve, flow compensation valve, commutator, restriction, motor and swash plate, pump is connected with motor, delivery side of pump respectively with pressure-compensated valve, two right filler openings of flow compensation valve connect, be connected with the rod chamber hydraulic fluid port of variable oil cylinder, be connected with the filler opening of commutator, the load-sensitive mouth of commutator is connected with the load-sensitive mouth of flow compensation valve, the left oil inleting port of pressure-compensated valve is connected with flow compensation valve lower end filler opening, pressure-compensated valve lower end oil outlet is connected with the rodless cavity hydraulic fluid port of variable oil cylinder, the plunger rod of variable oil cylinder is connected with the swash plate of pump, the inlet port of pump, the left oil outlet of the return opening of unloading port and commutator and flow compensation valve is connected with fuel tank.
Preferably, described pump is a load-sensitive formula Variable plunger pump.
Compared to prior art, hydraulic system of the present utility model has improved the working efficiency of loader hydraulic system effectively, has reduced energy consumption, has saved the energy.
Description of drawings
Fig. 1: the structural representation of loader energy-saving hydraulic system of the present utility model.
Symbol description: 1, fuel tank; 2, pump; 3, variable oil cylinder; 4, pressure-compensated valve; 5, flow compensation valve; 6, commutator; 7, restriction; 8, motor; 9, swash plate.
Embodiment
Below in conjunction with accompanying drawing, describe the structure of loader energy-saving hydraulic system of the present utility model and form.
As shown in Figure 1, this loader energy-saving hydraulic system mainly comprises: fuel tank 1, pump 2, variable oil cylinder 3, pressure-compensated valve 4, flow compensation valve 5, commutator 6, restriction 7, motor 8 and swash plate 9, pump 2 is connected with motor 8, the outlet of pump 2 respectively with pressure-compensated valve 4, two right filler openings of flow compensation valve 5 connect, be connected with the rod chamber hydraulic fluid port of variable oil cylinder 3, be connected with the filler opening of commutator 6, the load-sensitive mouth of commutator 6 is connected with the load-sensitive mouth of flow compensation valve 5, the left oil inleting port of pressure-compensated valve 4 is connected with flow compensation valve 5 lower end filler openings, pressure-compensated valve 4 lower end oil outlets are connected with the rodless cavity hydraulic fluid port of variable oil cylinder 3, the plunger rod of variable oil cylinder 3 is connected with the swash plate of pump 9, the inlet port of pump 2, the left oil outlet of the return opening of unloading port and commutator 6 and flow compensation valve 5 is connected with fuel tank 1.
During work, commutator 6 uniform rotation, the flow area of restriction 7 remains unchanged, at this moment, if the output flow of pump is excessive, can cause the pressure difference at restriction 7 two ends to increase, destroy the spool balance of flow compensation valve 5, overcome spring force and promote spool to left movement, the spool of flow compensation valve 5 is operated in right position; Then, the outlet pressure oil of pump 2 is by the rodless cavity of flow compensation valve 5 and pressure-compensated valve 4 entering variable oil cylinders 3, promoting swash plate 9 is rotated counterclockwise, control the angle of swash plate, thereby reduce the output flow of pump, so, the pressure difference at restriction 7 two ends reduces, until with the spring force balance, make the spool of flow compensation valve 5 be stabilized in meta, keep the fuel delivery of pump just to satisfy the fuel delivery requirement of commutator restriction 7.Otherwise, as the same when the output flow of pump is too small.Thereby the fuel delivery of pump is supplied with according to demand, reduced oil consumption, saved the energy.
With way of example the utility model is illustrated above, but the utility model is not limited to above-mentioned specific embodiment, all any change or modification of doing based on the utility model all belong to the claimed scope of the utility model.
Claims (2)
1. loader energy-saving hydraulic system, it is characterized in that, include: fuel tank (1), pump (2), variable oil cylinder (3), pressure-compensated valve (4), flow compensation valve (5), commutator (6), restriction (7), motor (8) and swash plate (9), wherein, described pump (2) is connected with described motor (8), the outlet of described pump (2) respectively with described pressure-compensated valve (4), two right filler openings of flow compensation valve (5) connect, be connected with the rod chamber hydraulic fluid port of described variable oil cylinder (3), be connected with the filler opening of described commutator (6), the load-sensitive mouth of described commutator (6) is connected with the load-sensitive mouth of described flow compensation valve (5), the left oil inleting port of described pressure-compensated valve (4) is connected with described flow compensation valve (5) lower end filler opening, described pressure-compensated valve (4) lower end oil outlet is connected with the rodless cavity hydraulic fluid port of described variable oil cylinder (3), the plunger rod of described variable oil cylinder (3) is connected with described swash plate (9), the inlet port of described pump (2), the left oil outlet of the return opening of unloading port and described commutator (6) and described flow compensation valve (5) is connected with described fuel tank (1).
2. a kind of loader energy-saving hydraulic system according to claim 1 is characterized in that, described pump (2) is a load-sensitive formula Variable plunger pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206891191U CN201944036U (en) | 2010-12-16 | 2010-12-16 | Energy-conservation hydraulic system for loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206891191U CN201944036U (en) | 2010-12-16 | 2010-12-16 | Energy-conservation hydraulic system for loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201944036U true CN201944036U (en) | 2011-08-24 |
Family
ID=44471380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206891191U Expired - Fee Related CN201944036U (en) | 2010-12-16 | 2010-12-16 | Energy-conservation hydraulic system for loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201944036U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943500A (en) * | 2012-11-16 | 2013-02-27 | 无锡汇虹机械制造有限公司 | Energy-saving control method of hydraulic negative flow of excavator |
| CN104454696A (en) * | 2014-10-17 | 2015-03-25 | 燕山大学 | Hydraulic energy-saving control system of cable reeling and unreeling vehicle |
| CN107725518A (en) * | 2017-09-30 | 2018-02-23 | 武汉船用机械有限责任公司 | A kind of Stress control valve group and hydraulic control valve group |
-
2010
- 2010-12-16 CN CN2010206891191U patent/CN201944036U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943500A (en) * | 2012-11-16 | 2013-02-27 | 无锡汇虹机械制造有限公司 | Energy-saving control method of hydraulic negative flow of excavator |
| CN104454696A (en) * | 2014-10-17 | 2015-03-25 | 燕山大学 | Hydraulic energy-saving control system of cable reeling and unreeling vehicle |
| CN107725518A (en) * | 2017-09-30 | 2018-02-23 | 武汉船用机械有限责任公司 | A kind of Stress control valve group and hydraulic control valve group |
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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: 20110824 Termination date: 20141216 |
|
| EXPY | Termination of patent right or utility model |