CN202644637U - Hydraulic circuit for excavator - Google Patents
Hydraulic circuit for excavator Download PDFInfo
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- CN202644637U CN202644637U CN 201220228811 CN201220228811U CN202644637U CN 202644637 U CN202644637 U CN 202644637U CN 201220228811 CN201220228811 CN 201220228811 CN 201220228811 U CN201220228811 U CN 201220228811U CN 202644637 U CN202644637 U CN 202644637U
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Abstract
The utility model discloses a hydraulic circuit for an excavator. The hydraulic circuit comprises a steering valve and a selector valve, wherein the steering valve is fixed on a pressure pipeline between a main valve of the excavator and a crusher, and the selector valve is fixed on a converging control pipeline on a shovel bucket; an oil inlet a3 of the steering valve is connected with a port CK1 of the main valve, an oil outlet a2 of the steering valve is connected with an intake oil converging port CK2 of a valve core of the shovel bucket, a port a4 of the steering valve is connected with an oil intake path of the crusher, a control port a1 of the steering valve is connected with a pilot oil port PPd of the crusher, a selecting port A1 of the selector valve is connected with a pilot oil port PPc of the valve core of the shovel bucket, a selecting port A2 of the selector valve is connected with the pilot oil port PPd of the crusher, and an oil outlet P is connected an oil port XBP1 of the main valve. The hydraulic circuit disclosed by the utility model has the advantages of realizing convergence of crushed pipelines, preventing a single pump from being excessively worn in the crushing operation, sufficiently utilizing the engine power and realizing energy saving and consumption reducing.
Description
Technical field
The utility model relates to a kind of hydraulic circuit of excavator, belongs to the hydraulic circuit of excavator technical field.
Background technology
Hydraulic crawler excavator is widely used in the excavation of bridge construction, the laying of urban duct, and the exploitation in mine, the occasions such as the dismounting of waste and old building have the advantages such as maneuverability, operating efficiency height.Hydraulic crawler excavator uses the Dual-pump flow-converging system mostly, be interflow in swing arm, the dipper valve, scraper bowl adopts the valve extension tube attached to realize Dual-pump flow-converging, as shown in Figure 1, the work such as excavation, leveling are finished jointly by equipment and revolution, the two main pumps supply hydraulic oil of working simultaneously.But when carrying out fragmentation when work, because of main valve inside without confluence passage, only have the second main pump work, this not only can cause the excessive wear of the second main pump, life-span to reduce, and can't take full advantage of the power of motor, causes the waste of the energy.
Summary of the invention
For the problem that above-mentioned prior art exists, the utility model provides a kind of hydraulic circuit of excavator, when excavator carries out fragmentation work, so that two main pumps are worked simultaneously, improves the application life of main pump.
To achieve these goals, the technical solution adopted in the utility model is: a kind of hydraulic circuit of excavator, comprise the first main pump, the second main pump, pioneer pump, main valve, destroyer and scraper bowl spool, the first main pump, the second main pump and pioneer pump series connection connect by pressure piping respectively between the first main pump, the second main pump, main valve and the destroyer; Pioneer pump is connected first rodding and connects with the scraper bowl spool; Also comprise and be fixed on the reversal valve on the pressure piping between excavator main valve and the destroyer and be fixed on selector valve on the control piper of scraper bowl interflow, the oil-in a3 of described reversal valve links to each other with main valve CK1 mouth, described reversal valve oil-out a2 mouth links to each other with the oil-feed interflow CK2 mouth of scraper bowl spool, the a4 mouth links to each other with the destroyer in-line, the control mouth a1 of described reversal valve links to each other with destroyer guide hydraulic fluid port PPd, the selection mouth A1 of selector valve links to each other with scraper bowl spool guide hydraulic fluid port PPc, select a mouthful A2 to link to each other with destroyer guide hydraulic fluid port PPd, oil-out P links to each other with the XBP1 hydraulic fluid port of main valve.
The beneficial effects of the utility model are: change at the existing hydraulic circuit of excavator, realize easily, by increasing the interflow pipeline of destroyer at the interflow of scraper bowl pipeline and reversal valve being switched, realized the interflow of broken pipeline, the excessive wear of single pump when avoiding excavator to carry out broken work, take full advantage of simultaneously engine power, realized energy-saving and cost-reducing.
Description of drawings
Fig. 1 is the hydraulic principle schematic diagram of prior art;
Fig. 2 is hydraulic principle schematic diagram of the present utility model.
Among the figure: 1, the first main pump, the 2, second main pump, 3, pioneer pump, 4, main valve, 5, destroyer, 6, the scraper bowl spool, 7, reversal valve, the 8, first selector valve, the 9, second selector valve, 10, stop valve.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 2: the utility model comprises the first main pump 1, the second main pump 2, pioneer pump 3, main valve 4, destroyer 5 and scraper bowl spool 6, the first main pump 1, the second main pump 2 and pioneer pump 3 series connection connect by pressure piping respectively between the first main pump 1, the second main pump 2, main valve 4 and the destroyer 5; Pioneer pump 3 is connected with the scraper bowl spool by first rodding connection; Also comprise and be fixed on the reversal valve 7 on the pressure piping between excavator main valve 4 and the destroyer 5 and be fixed on the second selector valve 9 on the pressure piping of scraper bowl interflow, the oil-in a3 of described reversal valve 7 links to each other with the CK1 mouth of main valve 4, described reversal valve 7 oil-out a2 mouths link to each other with the oil-feed interflow CK2 mouth of scraper bowl spool 6, the a4 mouth links to each other with destroyer 5 in-lines, the control mouth a1 of described reversal valve 7 links to each other with destroyer 5 guide's hydraulic fluid port PPd, the selection mouth A1 of the second selector valve 9 links to each other with scraper bowl spool 6 guide's hydraulic fluid port PPc, select a mouthful A2 to link to each other with destroyer 5 guide's hydraulic fluid port PPd, oil-out P links to each other with the XBP1 hydraulic fluid port of main valve 4.
In the utility model, destroyer 5 guide's hydraulic fluid port PPd one tunnel are connected with guide's foot valve, and second selector valve 9 of leading up to links to each other with the XBP1 hydraulic fluid port of main valve 4; Scraper bowl spool 6 guide's hydraulic fluid port PPa and PPb, the one tunnel is connected with pilot handle valve, and first selector valve 8 of leading up to links to each other with the second selector valve 9, and then links to each other with the XBP1 hydraulic fluid port of main valve 4 by the second selector valve 9.
Excavate, during smooth operation, operation scraper bowl control crank, reversal valve 7 control mouths are without guide's oil pressure, reversal valve 7 is under the effect of spring such as the left position among the figure, the guide oil of scraper bowl spool 6 acts on the meta stop valve 10 of main valve 4 by the second selector valve 9 simultaneously, cut off main pump oil sump tank passage, the main pump hydraulic oil collaborates to scraper bowl spool 6 by reversal valve 7 oil-outs; In the time of need to carrying out crushing operation, operation destroyer 5 guide's foot valves, the guide's oil pressure that leads to reversal valve 7 control mouths shifts reversal valve 7 such as the right position among the figure onto, make its commutation, the guide oil of the second selector valve 9 makes the stop valve 10 of main valve 4 change to left position, guide's oil pressure of destroyer 5 acts on the meta stop valve 10 of main valve 4 by the second selector valve 9 simultaneously, cut off main pump oil sump tank passage, the main pump hydraulic oil collaborates to destroyer 5 by reversal valve 7 oil-outs, realize the Dual-pump flow-converging of destroyer 5, single pump excessive wear of effectively having avoided single pump work to cause has prolonged application life of main pump, take full advantage of simultaneously engine power, realized energy-saving and cost-reducing.
Claims (3)
1. hydraulic circuit of excavator, comprise the first main pump (1), the second main pump (2), pioneer pump (3), main valve (4), destroyer (5) and scraper bowl spool (6), the first main pump (1), the second main pump (2) and pioneer pump (3) series connection connect by pressure piping respectively between the first main pump (1), the second main pump (2), main valve (4) and the destroyer (5); Pioneer pump (3) is connected 6 with the scraper bowl spool) guide's hydraulic fluid port connect by first rodding; Characterized by further comprising and be fixed on the reversal valve (7) on the pressure piping between excavator main valve (4) and the destroyer (5) and be fixed on the second selector valve (9) on the pressure piping of scraper bowl interflow, the oil-in a3 of described reversal valve (7) links to each other with the CK1 mouth of main valve (4), described reversal valve (7) oil-out a2 mouth links to each other with the oil-feed interflow CK2 mouth of scraper bowl spool (6), the a4 mouth links to each other with destroyer (5) in-line, the control mouth a1 of described reversal valve (7) links to each other with destroyer (5) guide's hydraulic fluid port PPd, the selection mouth A1 of the second selector valve (9) links to each other with scraper bowl spool (6) guide's hydraulic fluid port PPc, select a mouthful A2 to link to each other with destroyer (5) guide's hydraulic fluid port PPd, oil-out P links to each other with the XBP1 hydraulic fluid port of main valve (4).
2. a kind of hydraulic circuit of excavator according to claim 1 is characterized in that described destroyer (5) guide's hydraulic fluid port PPd one tunnel is connected with guide's foot valve, and the oil-out P of the second selector valve (9) of leading up to links to each other with the XBP1 of main valve (4).
3. a kind of hydraulic circuit of excavator according to claim 1, it is characterized in that described scraper bowl spool (6) guide's hydraulic fluid port PPa and PPb, one the tunnel is connected with pilot handle valve, the first selector valve (8) of leading up to links to each other with the second selector valve (9), and then links to each other with the XBP1 hydraulic fluid port of main valve (4) by the second selector valve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220228811 CN202644637U (en) | 2012-05-21 | 2012-05-21 | Hydraulic circuit for excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220228811 CN202644637U (en) | 2012-05-21 | 2012-05-21 | Hydraulic circuit for excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202644637U true CN202644637U (en) | 2013-01-02 |
Family
ID=47413761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220228811 Withdrawn - After Issue CN202644637U (en) | 2012-05-21 | 2012-05-21 | Hydraulic circuit for excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202644637U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704525A (en) * | 2012-05-21 | 2012-10-03 | 徐州徐工挖掘机械有限公司 | Hydraulic loop of excavator |
| CN109778938A (en) * | 2019-01-22 | 2019-05-21 | 徐州徐工挖掘机械有限公司 | One kind is based on broken operating condition excavator adaptive power control device and method |
| CN113293819A (en) * | 2021-06-01 | 2021-08-24 | 山东临工工程机械有限公司 | Excavator working tool confluence control system and excavator |
-
2012
- 2012-05-21 CN CN 201220228811 patent/CN202644637U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704525A (en) * | 2012-05-21 | 2012-10-03 | 徐州徐工挖掘机械有限公司 | Hydraulic loop of excavator |
| CN102704525B (en) * | 2012-05-21 | 2014-10-22 | 徐州徐工挖掘机械有限公司 | Hydraulic loop of excavator |
| CN109778938A (en) * | 2019-01-22 | 2019-05-21 | 徐州徐工挖掘机械有限公司 | One kind is based on broken operating condition excavator adaptive power control device and method |
| CN109778938B (en) * | 2019-01-22 | 2021-03-16 | 徐州徐工挖掘机械有限公司 | Excavator power self-adaptive control device and method based on crushing working condition |
| CN113293819A (en) * | 2021-06-01 | 2021-08-24 | 山东临工工程机械有限公司 | Excavator working tool confluence control system and excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130102 Effective date of abandoning: 20141022 |
|
| RGAV | Abandon patent right to avoid regrant |