CN115680044B - Hydraulic system for recovering energy of movable arm oil cylinder of excavator - Google Patents
Hydraulic system for recovering energy of movable arm oil cylinder of excavator Download PDFInfo
- Publication number
- CN115680044B CN115680044B CN202211464348.7A CN202211464348A CN115680044B CN 115680044 B CN115680044 B CN 115680044B CN 202211464348 A CN202211464348 A CN 202211464348A CN 115680044 B CN115680044 B CN 115680044B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- valve
- bucket
- oil cylinder
- reversing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to an energy recovery hydraulic system of an excavator movable arm oil cylinder, which comprises the following components: a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline; the second pipeline is provided with a reversing throttle valve; a seventh pipeline, on which a synchronous diversion reversing throttle valve is arranged, one end of which is connected with the second pipeline, and the other end of which is respectively connected with a rodless cavity of the bucket cylinder and a rod cavity of the bucket rod cylinder; a controller adapted to control switching of the reversing throttle, the synchronous split reversing throttle; in the next excavating action process of the excavator, at the moment, the movable arm descends, the bucket rod extends outwards and the bucket is retracted, and the descending energy of the movable arm is converted into the energy required by the actions of the movable arm, the bucket rod and the bucket, so that the energy recovery of the movable arm oil cylinder is realized, other action speeds are accelerated, and the whole system is more energy-saving.
Description
Technical Field
The invention relates to the field of excavators, in particular to an energy recovery hydraulic system of an excavator movable arm oil cylinder.
Background
When loading and unloading of the general excavator are completed and the next excavating action process is carried out, high-pressure oil output by a main pump is transmitted to a rodless cavity of a movable arm oil cylinder, a rod cavity of a bucket oil cylinder and a rodless cavity of a bucket oil cylinder through a multi-way valve, so that the actions of lowering a large arm, extending a bucket rod outwards and recovering the bucket are realized; at this time, the large cavity of the movable arm is direct oil is returned through the multi-way valve. However, the large cavity of the movable arm is acted by the gravity of the working device, so that the hydraulic oil with pressure exists in the large cavity, and the energy of direct oil return is wasted.
In summary, how to realize the lowering of the large arm, that is, the retraction of the piston rod of the boom cylinder, the recovery of energy becomes a problem that needs to be solved by researchers in the field.
Disclosure of Invention
The invention aims to solve the technical problems that: how to lower the large arm and recover the energy.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to an energy recovery hydraulic system of an excavator movable arm oil cylinder, which comprises the following components: the first pipeline is connected with the oil tank and a rod cavity of the movable arm oil cylinder; the second pipeline is connected with the oil tank and the rodless cavity of the movable arm oil cylinder; the third pipeline is connected with the oil tank and a rod cavity of the bucket oil cylinder; a fourth pipeline connected with the oil tank and the rodless cavity of the bucket oil cylinder; a fifth pipeline which is connected with the oil tank and a rod cavity of the bucket rod oil cylinder; a sixth pipeline connected with the oil tank and the rodless cavity of the bucket rod oil cylinder; the second pipeline is provided with a reversing throttle valve; a seventh pipeline, on which a synchronous diversion reversing throttle valve is arranged, one end of which is connected with the second pipeline, and the other end of which is respectively connected with a rodless cavity of the bucket cylinder and a rod cavity of the bucket rod cylinder; and the controller is suitable for controlling the switching of the reversing throttle valve and the synchronous diversion reversing throttle valve.
In the scheme, a first pipeline and a second pipeline control lifting of a piston rod of a movable arm oil cylinder, a third pipeline and a fourth pipeline control lifting of a piston rod of a bucket oil cylinder, and a fifth pipeline and a sixth pipeline control lifting of a piston rod of a bucket oil cylinder; thus, the movement of the large arm, the bucket rod and the bucket can be realized; when the large arm descends, the controller controls the reversing throttle valve and the synchronous diversion reversing throttle valve to switch, the reversing throttle valve is switched from a long-pass state to a throttle state, because hydraulic oil flows towards one end with low load, the purpose of the designed throttle valve prevents a rodless cavity of the movable arm oil cylinder from directly leaving back to the oil tank, and redundant hydraulic oil flows to the rodless cavity of the bucket oil cylinder and a rod cavity of the bucket rod oil cylinder through the synchronous diversion reversing throttle valve on a seventh pipeline, so that the eversion of the bucket rod and the adduction of the bucket are realized; in a word, through the decline of big arm, because the switching of choke valve, synchronous reposition of redundant personnel switching-over choke valve, with partial hydraulic oil get into in arm hydro-cylinder, the scraper bowl hydro-cylinder, drive arm, scraper bowl carry out corresponding action, so arm, the required energy of scraper bowl action originally just can reduce, realized the recovery of energy.
In order to illustrate the concrete structure of the reversing throttle valve, the reversing throttle valve is a two-position two-way electromagnetic reversing throttle valve; one of the two-position two-way electromagnetic reversing throttle valves is a flow valve, and the other one is a throttle valve.
In order to illustrate the concrete structure of the synchronous diversion reversing throttle valve, the synchronous diversion reversing throttle valve is adopted to be a two-position three-way electromagnetic synchronous unidirectional diversion valve; one of the two-position three-way electromagnetic synchronous one-way flow dividing valves is a cut-off valve, and the other one is a one-way flow dividing valve;
The two orifices of the two-position three-way electromagnetic synchronous one-way flow divider are designed differently according to calculation and test data, so that the flow to the bucket cylinder and the arm cylinder is distributed according to the design requirement, and the coordination requirement is met; the two check valves designed by the two-position three-way electromagnetic synchronous one-way flow dividing valve are used for avoiding the situation that the pressure is different and the oil way is communicated to cause abnormal actions due to different loads of the bucket cylinder and the bucket rod cylinder.
In order to further realize energy recovery, the invention adopts the structure that the first pipeline and the second pipeline are commonly connected with a three-position four-way reversing regeneration valve; one of the three-position four-way reversing regeneration valves is a cut-off valve, the second position is a flow valve, and the third position is a regeneration one-way valve;
When the three-position four-way reversing regeneration valve is switched to a regeneration valve state, after the return oil pressure of the rodless cavity reaches the opening pressure of the regeneration check valve when the movable arm oil cylinder descends, the regeneration check valve can be opened by return oil of the rodless cavity, and return oil of the rod cavity is transmitted to the inside of the rodless cavity, so that the movable arm flow recovery is realized.
Besides the two orifices in the two-position three-way electromagnetic synchronous unidirectional flow dividing valve are distributed according to the flow, the sizes of the throttle openings in the three-position four-way reversing regeneration valve and the reversing throttle valve are matched, so that the coordination requirement is met.
The invention has the beneficial effects that: the invention relates to an energy recovery hydraulic system of an excavator movable arm oil cylinder, which is used for converting the energy of a movable arm falling into the energy required by the actions of the movable arm, a bucket rod and a bucket in the process of the next excavating action of an excavator, thereby realizing the energy recovery of the movable arm oil cylinder, accelerating other action speeds and simultaneously enabling the whole system to be more energy-saving.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a hydraulic schematic of the present invention;
In the figure: 1-first pipeline, 2-movable arm oil cylinder, 3-bucket oil cylinder, 4-bucket rod oil cylinder, 5-reversing throttle valve, 6-synchronous diversion reversing throttle valve, 7-controller, 8-three-position four-way reversing regeneration valve, 9-first pressure switch, 11-second pressure switch, 10-third pressure switch, 100-first pipeline, 200-second pipeline, 300-third pipeline, 400-fourth pipeline, 500-fifth pipeline, 600-sixth pipeline and 700-seventh pipeline.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
Example 1
As shown in fig. 1, the present invention is a hydraulic energy recovery system for an excavator boom cylinder, comprising: a first pipeline 100 which is connected with the oil tank 1 and the rod cavity of the movable arm oil cylinder 2; a second pipeline 200 which is connected with the oil tank 1 and the rodless cavity of the movable arm oil cylinder 2; a third pipeline 300 which is connected with the oil tank 1 and the rod cavity of the bucket oil cylinder 3; a fourth pipe 400 connected to the tank 1 and the rodless chamber of the bucket cylinder 3; a fifth pipeline 500 which is connected with the oil tank 1 and the rod cavity of the bucket rod oil cylinder 4; a sixth pipeline 600, which connects the oil tank 1 and the rodless cavity of the arm cylinder 4; the second pipeline 200 is provided with a reversing throttle valve 5; a seventh pipeline 700, on which a synchronous diversion and reversing throttle valve 6 is arranged, one end of which is connected with the second pipeline 200, and the other end of which is respectively connected with the rodless cavity of the bucket cylinder 3 and the rod cavity of the bucket rod cylinder 4; a controller 7 adapted to control the switching of the reversing throttle 5, the synchronous split reversing throttle 6.
In the scheme, a first pipeline and a second pipeline control lifting of a piston rod of a movable arm oil cylinder, a third pipeline and a fourth pipeline control lifting of a piston rod of a bucket oil cylinder, and a fifth pipeline and a sixth pipeline control lifting of a piston rod of a bucket oil cylinder; thus, the movement of the large arm, the bucket rod and the bucket can be realized; when the boom is lowered, the first pressure switch 9 for the boom lowering operation, the second pressure switch 11 for the bucket retraction operation, and the third pressure switch 10 for the arm extension operation are all detected as the operation pressures, and the controller 7 can determine that the excavator is about to perform the next excavating operation; the controller controls the reversing throttle valve and the synchronous diversion reversing throttle valve to switch, the reversing throttle valve is switched from a long-pass state to a throttle state, because hydraulic oil flows towards one end with low load, the purpose of the designed throttle valve prevents a rodless cavity of the movable arm oil cylinder from directly leaving the oil return tank, and redundant hydraulic pressure flows to the rodless cavity of the bucket oil cylinder and a rod cavity of the bucket rod oil cylinder through the synchronous diversion reversing throttle valve on a seventh pipeline, so that the eversion of the bucket rod and the adduction of the bucket are realized; in a word, through the decline of big arm, because the switching of choke valve, synchronous reposition of redundant personnel switching-over choke valve, with partial hydraulic oil get into in arm hydro-cylinder, the scraper bowl hydro-cylinder, drive arm, scraper bowl carry out corresponding action, so arm, the required energy of scraper bowl action originally just can reduce, realized the recovery of energy.
Example 2
As shown in fig. 1, in order to illustrate the specific structure of the reversing throttle valve on the basis of embodiment 1, the reversing throttle valve 5 is a two-position two-way electromagnetic reversing throttle valve; one of the two-position two-way electromagnetic reversing throttle valves is a flow valve, and the other is a throttle valve.
Example 3
As shown in fig. 1, in order to illustrate a specific structure of the synchronous diversion and reversing throttle valve on the basis of embodiment 1, the invention adopts the synchronous diversion and reversing throttle valve 6 as a two-position three-way electromagnetic synchronous unidirectional diversion valve; one of the two-position three-way electromagnetic synchronous one-way flow dividing valves is a cut-off valve, and the other one is a one-way flow dividing valve;
The two orifices of the two-position three-way electromagnetic synchronous one-way flow divider are designed differently according to calculation and test data, so that the flow to the bucket cylinder and the arm cylinder is distributed according to the design requirement, and the coordination requirement is met; the two check valves designed by the two-position three-way electromagnetic synchronous one-way flow dividing valve are used for avoiding the situation that the pressure is different and the oil way is communicated to cause abnormal actions due to different loads of the bucket cylinder and the bucket rod cylinder.
Example 4
As shown in fig. 1, in order to further realize energy recovery based on embodiment 1, the present invention adopts a first pipeline 100 and a second pipeline 200 to be commonly connected with a three-position four-way reversing regeneration valve 8; one of the three-position four-way reversing regeneration valves is a cut-off valve, the second position is a flow valve, and the third position is a regeneration one-way valve;
When the three-position four-way reversing regeneration valve is switched to a regeneration valve state, after the return oil pressure of the rodless cavity reaches the opening pressure of the regeneration check valve when the movable arm oil cylinder descends, the regeneration check valve can be opened by return oil of the rodless cavity, and return oil of the rod cavity is transmitted to the inside of the rodless cavity, so that the movable arm flow recovery is realized.
Besides the two orifices in the two-position three-way electromagnetic synchronous unidirectional flow dividing valve are distributed according to the flow, the sizes of the throttle openings in the three-position four-way reversing regeneration valve and the reversing throttle valve are matched, so that the coordination requirement is met.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (4)
1. An excavator boom cylinder energy recovery hydraulic system, comprising:
The first pipeline is connected with the oil tank and a rod cavity of the movable arm oil cylinder;
the second pipeline is connected with the oil tank and the rodless cavity of the movable arm oil cylinder;
The third pipeline is connected with the oil tank and a rod cavity of the bucket oil cylinder;
A fourth pipeline connected with the oil tank and the rodless cavity of the bucket oil cylinder;
a fifth pipeline which is connected with the oil tank and a rod cavity of the bucket rod oil cylinder;
A sixth pipeline connected with the oil tank and the rodless cavity of the bucket rod oil cylinder;
the second pipeline is provided with a reversing throttle valve;
a seventh pipeline, on which a synchronous diversion reversing throttle valve is arranged, one end of which is connected with the second pipeline positioned between the rodless cavity of the movable arm oil cylinder and the reversing throttle valve, and the other end of which is respectively connected with the rodless cavity of the bucket oil cylinder and the rod cavity of the bucket oil cylinder;
And the controller is suitable for controlling the switching of the reversing throttle valve and the synchronous diversion reversing throttle valve.
2. The energy recovery hydraulic system of an excavator boom cylinder of claim 1 wherein the reversing throttle is a two-position two-way electromagnetic reversing throttle;
one of the two-position two-way electromagnetic reversing throttle valves is a flow valve, and the other one is a throttle valve.
3. The energy recovery hydraulic system of the excavator boom cylinder of claim 1, wherein the synchronous diversion reversing throttle valve is a two-position three-way electromagnetic synchronous unidirectional diversion valve;
one of the two-position three-way electromagnetic synchronous one-way flow dividing valve is a cut-off valve, and the other one is a one-way flow dividing valve.
4. The energy recovery hydraulic system of the excavator boom cylinder of claim 1, wherein the first pipeline and the second pipeline are commonly connected with a three-position four-way reversing regeneration valve;
One of the three-position four-way reversing regeneration valves is a cut-off valve, the second position is a flow valve, and the third position is a regeneration one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211464348.7A CN115680044B (en) | 2022-11-22 | 2022-11-22 | Hydraulic system for recovering energy of movable arm oil cylinder of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211464348.7A CN115680044B (en) | 2022-11-22 | 2022-11-22 | Hydraulic system for recovering energy of movable arm oil cylinder of excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115680044A CN115680044A (en) | 2023-02-03 |
| CN115680044B true CN115680044B (en) | 2024-10-01 |
Family
ID=85053993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211464348.7A Active CN115680044B (en) | 2022-11-22 | 2022-11-22 | Hydraulic system for recovering energy of movable arm oil cylinder of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115680044B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626610A (en) * | 2016-03-21 | 2016-06-01 | 山东理工大学 | Energy-saving system of mechanical arm of energy-saving bagging machine |
| CN110359516A (en) * | 2019-07-24 | 2019-10-22 | 青岛雷沃工程机械有限公司 | Descending movable arm of excavator hydraulic control system and excavator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH056201U (en) * | 1991-07-05 | 1993-01-29 | 新キヤタピラー三菱株式会社 | Energy recovery circuit for hydraulic system |
| JP3571147B2 (en) * | 1996-06-11 | 2004-09-29 | 日立建機株式会社 | Hydraulic drive |
| JP6639130B2 (en) * | 2015-07-15 | 2020-02-05 | ナブテスコ株式会社 | Hydraulic circuit for construction machinery and construction machinery |
| CN110409527A (en) * | 2019-06-28 | 2019-11-05 | 三一重机有限公司 | A kind of movable arm potential energy recycling system and excavator |
| CN113882459B (en) * | 2021-09-30 | 2023-02-17 | 徐州徐工挖掘机械有限公司 | Excavator energy recovery system and excavator |
-
2022
- 2022-11-22 CN CN202211464348.7A patent/CN115680044B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626610A (en) * | 2016-03-21 | 2016-06-01 | 山东理工大学 | Energy-saving system of mechanical arm of energy-saving bagging machine |
| CN110359516A (en) * | 2019-07-24 | 2019-10-22 | 青岛雷沃工程机械有限公司 | Descending movable arm of excavator hydraulic control system and excavator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115680044A (en) | 2023-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9303632B2 (en) | Energy recovery control circuit and work machine | |
| CN103643709B (en) | Hydraulic excavator for mine swing arm hydraulic control system | |
| CN110258684A (en) | A kind of energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling | |
| CN109235534B (en) | Multi-path hydraulic system of hydraulic excavator | |
| CN203926189U (en) | Hydraulic control system, suspension arm mechanism and the hoist of a kind of pair of oil cylinder sequential telescopic | |
| CN102619805A (en) | Hydraulic cylinder suitable for controlling plurality of hydraulic cylinders to extend sequentially | |
| CN203188273U (en) | Excavator hydraulic control system and hydraulic excavator | |
| CN112983909A (en) | Movable arm hydraulic system | |
| CN115680044B (en) | Hydraulic system for recovering energy of movable arm oil cylinder of excavator | |
| CN214661148U (en) | Single-pump source load port independent load-sensing energy-saving hydraulic system for excavators | |
| CN110486337A (en) | Multiple cavity oil cylinder closed type hydraulic system and engineering machinery | |
| CN114341441B (en) | Method for controlling hydraulic actuator, hydraulic system and engineering machine | |
| CN204199342U (en) | Excavator swing arm damping fluid pressure control device | |
| CN211778291U (en) | Multi-way valve of excavator | |
| CN216689565U (en) | Hydraulic quick-change device control loop for excavator | |
| CN102304931B (en) | Hydraulic energy-saving control system and method for loader movable arm | |
| CN104278703A (en) | Damping hydraulic controller for moving arm of excavator | |
| CN213870490U (en) | Novel potential energy recovery control system | |
| CN205331095U (en) | Energy -saving hydraulic valve | |
| CN112343872B (en) | Auxiliary lifting hydraulic system and engineering machinery | |
| CN214366949U (en) | Hydraulic system of excavator | |
| CN109356218B (en) | Distribution valve for loader and loader hydraulic system | |
| CN2588103Y (en) | Energy-saving self-locking hydraulic controlled one direction multi-way change valve | |
| CN216642607U (en) | Master control valve, hydraulic system and engineering machinery | |
| CN202642878U (en) | Hydraulic balance device for car puller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |