CN114934552A - Energy-saving hydraulic system for working device of face shovel excavator - Google Patents
Energy-saving hydraulic system for working device of face shovel excavator Download PDFInfo
- Publication number
- CN114934552A CN114934552A CN202210635669.2A CN202210635669A CN114934552A CN 114934552 A CN114934552 A CN 114934552A CN 202210635669 A CN202210635669 A CN 202210635669A CN 114934552 A CN114934552 A CN 114934552A
- Authority
- CN
- China
- Prior art keywords
- oil
- oil cylinder
- control valve
- movable arm
- port
- 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.)
- Granted
Links
- 239000003921 oil Substances 0.000 claims description 186
- 239000010720 hydraulic oil Substances 0.000 claims description 23
- 238000005381 potential energy Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/422—Drive systems for bucket-arms, front-end loaders, dumpers or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention belongs to the technical field of a face shovel excavator, and particularly relates to an energy-saving hydraulic system for a working device of the face shovel excavator, which comprises a control valve group, a movable arm oil cylinder and a bucket rod oil cylinder, wherein the control valve group comprises a three-position reversing valve I and a three-position reversing valve II; two working oil ports of the three-position reversing valve I are respectively connected with a large cavity of the bucket rod oil cylinder and a small cavity of the bucket rod oil cylinder; two working oil ports of the three-position reversing valve II are respectively connected with a large cavity of the movable arm oil cylinder and a small cavity of the movable arm oil cylinder; the hydraulic bucket is characterized by further comprising a leveling oil cylinder arranged between the movable arm and the bucket rod, wherein a large cavity of the leveling oil cylinder is connected with a large cavity of the movable arm oil cylinder, and a small cavity of the leveling oil cylinder is connected with a small cavity of the movable arm oil cylinder. And establishing action relation of the movable arm oil cylinder and the arm oil cylinder through the leveling oil cylinder. When the movable arm descends, converting partial gravitational potential energy of the descending movable arm into power of the outward swing of the bucket rod; when the bucket rod is internally received, the gravitational potential energy collected inside the bucket rod is converted into the kinetic energy for lifting the movable arm. The power output of the engine is reduced, and the energy-saving effect is achieved.
Description
Technical Field
The invention belongs to the technical field of a face shovel excavator, and particularly relates to an energy-saving hydraulic system for a working device of the face shovel excavator.
Background
With the rapid development of green economy, the industry and the market put forward higher requirements on the energy consumption and emission of large-scale mechanical equipment, and the energy-saving and emission-reducing technology becomes an important direction for the research and development of the engineering machinery field.
Through research on the operating characteristics of a face shovel hydraulic excavator, in a working cycle of excavating and loading, a compound action of inward closing of a boom lifting bucket rod and a compound action of outward swinging of a boom lowering bucket rod are commonly used for the face shovel hydraulic excavator, the actions of the boom cylinder and the actions of an arm cylinder of the existing face shovel hydraulic excavator are pushed by hydraulic pressure, and the relation between the actions of the boom cylinder and the arm cylinder is not considered.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an energy-saving hydraulic system for a working device of a front shovel excavator, which reduces the power output of an engine by utilizing the conversion and utilization of self gravitational potential energy when a movable arm descends and an arm retracts by establishing the action relation of a movable arm oil cylinder and an arm oil cylinder, thereby achieving the energy-saving effect.
The invention is realized by the following technical scheme: an energy-saving hydraulic system for a working device of a face shovel excavator comprises a control valve group, a movable arm oil cylinder and a bucket rod oil cylinder, wherein the control valve group comprises a three-position reversing valve I and a three-position reversing valve II; two working oil ports of the three-position reversing valve I are respectively connected with a large cavity of the bucket rod oil cylinder and a small cavity of the bucket rod oil cylinder; two working oil ports of the three-position reversing valve II are respectively connected with a large cavity of the movable arm oil cylinder and a small cavity of the movable arm oil cylinder; an oil inlet of the three-position reversing valve I and an oil inlet of the three-position reversing valve II are both connected with the pump, and an oil return port of the three-position reversing valve I and an oil return port of the three-position reversing valve II are both connected with the hydraulic oil tank; the hydraulic bucket is characterized by further comprising a leveling oil cylinder arranged between the movable arm and the bucket rod, a large cavity of the leveling oil cylinder is connected with a large cavity of the movable arm oil cylinder, and a small cavity of the leveling oil cylinder is connected with a small cavity of the movable arm oil cylinder.
Furthermore, the control valve group is an integrated valve, a first working oil port of the three-position reversing valve I is connected with an oil port B1 of the control valve group, and a second working oil port of the three-position reversing valve I is connected with an oil port A1 of the control valve group; a first working oil port of the three-position reversing valve II is connected with an oil port B2 of the control valve group, and a second working oil port of the three-position reversing valve II is connected with an oil port A2 of the control valve group; an oil inlet of the three-position reversing valve I and an oil inlet of the three-position reversing valve II are connected with an oil inlet P of the control valve group, and an oil return port of the three-position reversing valve I and an oil return port of the three-position reversing valve II are connected with an oil return port T of the control valve group.
Furthermore, a main overflow valve is arranged between the oil inlet P of the control valve group and the oil return port T of the control valve group.
Further, overload overflow valves are respectively arranged between the oil port B1 of the control valve group and the oil return port T of the control valve group, between the oil port a1 of the control valve group and the oil return port T of the control valve group, between the oil port B2 of the control valve group and the oil return port T of the control valve group, and between the oil port a2 of the control valve group and the oil return port T of the control valve group.
Furthermore, a one-way throttle valve is arranged between the control valve group and the large cavity of the movable arm oil cylinder, and an oil outlet of the one-way valve of the one-way throttle valve is connected with the large cavity of the movable arm oil cylinder.
Furthermore, the oil inlet of the three-position reversing valve I and the oil inlet of the three-position reversing valve II are both provided with one-way valves.
The invention has the beneficial effects that: and establishing action relation between the movable arm cylinder and the arm cylinder through the leveling cylinder. When the movable arm descends, converting partial gravitational potential energy of the descending movable arm into power of the outward swing of the bucket rod; when the bucket rod is internally received, gravitational potential energy collected in the bucket rod is converted into kinetic energy for lifting the movable arm, so that the power output of the engine is reduced, and an energy-saving effect is achieved.
Drawings
FIG. 1 is a hydraulic schematic of the present invention;
FIG. 2 is a schematic structural view of a working device of a face shovel excavator according to the present invention;
in the figure, 1, a pump, 2, a hydraulic oil tank, 3, a control valve group, 3-1, three-position directional valves I, 3-2, three-position directional valves II, 3-3, a main overflow valve, 3-4, an overload overflow valve, 4, a one-way throttle valve, 5, a movable arm oil cylinder, 6, a leveling oil cylinder, 7, a bucket, 8, an arm oil cylinder, 9, a movable arm, 10 and an arm.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
As shown in fig. 2, the work apparatus of the front shovel includes a bucket 7, an arm 10, and a boom 9, and the bucket 7 is hingedly connected to the arm 10 and the boom 9. A movable arm oil cylinder 5 is arranged between the movable arm 9 and the base, and two movable arm oil cylinders 5 are symmetrically arranged on two sides of the movable arm 9. An arm cylinder 8 and a leveling cylinder 6 are arranged between the arm 10 and the movable arm 9, and the leveling cylinder 6 is arranged right above the arm cylinder 8.
As shown in fig. 1 and 2, an energy-saving hydraulic system for a working device of a face shovel excavator includes a control valve group 3, a boom cylinder 5, a leveling cylinder 6, and an arm cylinder 8. The control valve group 3 comprises a three-position reversing valve I3-1 and a three-position reversing valve II 3-2. Two working oil ports of the three-position reversing valve I3-1 are respectively connected with a large cavity of the bucket rod oil cylinder 8 and a small cavity of the bucket rod oil cylinder 8; two working oil ports of the three-position reversing valve II 3-2 are respectively connected with the large cavity of the movable arm oil cylinder 5 and the small cavity of the movable arm oil cylinder 5. An oil inlet of the three-position directional valve I3-1 and an oil inlet of the three-position directional valve II 3-2 are both connected with an oil outlet of the pump 1, and an oil return port of the three-position directional valve I3-1 and an oil return port of the three-position directional valve II 3-2 are both connected with the hydraulic oil tank 2.
When the three-position directional valve I3-1 is positioned at a left station, the pump 1 is connected with the small cavity of the bucket rod oil cylinder 8 through the three-position directional valve I3-1, and the large cavity of the bucket rod oil cylinder 8 is connected with the hydraulic oil tank 2 through the three-position directional valve I3-1. When the three-position directional valve I3-1 is located at the right station, the pump 1 is connected with the large cavity of the bucket rod oil cylinder 8 through the three-position directional valve I3-1, and the small cavity of the bucket rod oil cylinder 8 is connected with the hydraulic oil tank 2 through the three-position directional valve I3-1. When the three-position directional valve II 3-2 is positioned at a left station, the pump 1 is connected with the large cavity of the movable arm oil cylinder 5 through the three-position directional valve II 3-2, and the small cavity of the movable arm oil cylinder 5 is connected with the hydraulic oil tank 2 through the three-position directional valve II 3-2. When the three-position directional valve II 3-2 is located at the right station, the pump 1 is connected with the small cavity of the movable arm oil cylinder 5 through the three-position directional valve II 3-2, and the large cavity of the movable arm oil cylinder 5 is connected with the hydraulic oil tank 2 through the three-position directional valve II 3-2.
When the three-position directional valve I3-1 and the three-position directional valve II 3-2 are both positioned at a left station, hydraulic oil is taken from the hydraulic oil tank 2 through the pump 1 to supply oil to the small cavity of the bucket rod oil cylinder 8 and the large cavity of the movable arm oil cylinder 5, and the action combination of lifting of the movable arm 9 and retraction of the bucket rod 10 is realized. When the three-position directional valve I3-1 and the three-position directional valve II 3-2 are both positioned at the right station, hydraulic oil is taken from the hydraulic oil tank 2 through the pump 1 to supply oil to the large cavity of the bucket rod oil cylinder 8 and the small cavity of the movable arm oil cylinder 5, and the action compounding of descending of the movable arm 9 and outward swinging of the bucket rod 10 is realized.
Preferably, the control valve group 3 is an integrated valve. The first working oil port of the three-position reversing valve I3-1 is connected with an oil port B1 of the control valve group 3, and an oil port B1 of the control valve group 3 is connected with a large cavity of the bucket rod oil cylinder 8. The second working oil port of the three-position reversing valve I3-1 is connected with an oil port A1 of the control valve group 3, and an oil port A1 of the control valve group 3 is connected with a small cavity of the bucket rod oil cylinder 8. And a first working oil port of the three-position reversing valve II 3-2 is connected with an oil port B2 of the control valve group 3, and an oil port B2 of the control valve group 3 is connected with a small cavity of the boom cylinder 5. The second working oil port of the three-position reversing valve II 3-2 is connected with the oil port A2 of the control valve group 3, and the oil port A2 of the control valve group 3 is connected with the large cavity of the boom cylinder 5. An oil inlet of the three-position directional valve I3-1 and an oil inlet of the three-position directional valve II 3-2 are both connected with an oil inlet P of the control valve group 3, and the oil inlet P of the control valve group 3 is connected with the hydraulic oil tank 2 through the pump 1. An oil return port of the three-position reversing valve I3-1 and an oil return port of the three-position reversing valve II 3-2 are both connected with an oil return port T of the control valve group 3, and the oil return port T of the control valve group 3 is connected with the hydraulic oil tank 2.
As shown in figure 1, a three-position reversing valve I3-1 and a three-position reversing valve II 3-2 both adopt electromagnetic reversing valves. When Y1 of the three-position directional control valve I3-1 and Y3 of the three-position directional control valve II 3-2 are electrified, the three-position directional control valve I3-1 and the three-position directional control valve II 3-2 are switched to a left station. When the Y2 of the three-position reversing valve I3-1 and the Y4 of the three-position reversing valve II 3-2 are electrified, the three-position reversing valve I3-1 and the three-position reversing valve II 3-2 are switched to a right station.
The large cavity of the leveling oil cylinder 6 is connected with the large cavity of the movable arm oil cylinder 5, and the small cavity of the leveling oil cylinder 6 is connected with the small cavity of the movable arm oil cylinder 5. When the boom 9 and the arm 10 perform combined operation, the oil in the leveling cylinder 6 flows between the boom cylinder 5 and the leveling cylinder 6.
When the combined action of lifting the movable arm 9 and retracting the bucket rod 10 needs to be performed, the Y1 of the three-position directional valve I3-1 and the Y3 of the three-position directional valve II 3-2 are electrified, and the three-position directional valve I3-1 and the three-position directional valve II 3-2 are switched to a left station. The pump 1 drives hydraulic oil in the hydraulic oil tank 2 to enter a large cavity of the movable arm oil cylinder 5 and a small cavity of the arm oil cylinder 8 through the control valve group 3 respectively, and at the moment, the small cavity of the movable arm oil cylinder 5 and the large cavity of the arm oil cylinder 8 are communicated with the hydraulic oil tank 2 through the control valve group 3. When the bucket rod 10 is internally received, the descending of the bucket rod 10 can push hydraulic oil in the large cavity of the leveling cylinder 6 to enter the large cavity of the movable arm cylinder 5, so that assistance is provided for the lifting of the movable arm, the gravitational potential energy collected in the bucket rod 10 is converted into the kinetic energy for the lifting of the movable arm 9, and the movable arm 9 is pushed to lift.
When the composite actions of descending of the movable arm 9 and outward swinging of the bucket rod 10 are required, the Y2 of the three-position directional valve I3-1 and the Y4 of the three-position directional valve II 3-2 are electrified, and the three-position directional valve I3-1 and the three-position directional valve II 3-2 are switched to the right position. The pump 1 drives hydraulic oil in the hydraulic oil tank 2 to enter a small cavity of the movable arm oil cylinder 5 and a large cavity of the arm oil cylinder 8 through the control valve group 3 respectively, and at the moment, the large cavity of the movable arm oil cylinder 5 and the small cavity of the arm oil cylinder 8 are communicated with the hydraulic oil tank 2 through the control valve group 3. When the movable arm 9 descends, the gravitational potential energy of the movable arm 9 can be converted into pressure oil in a large cavity of the movable arm oil cylinder 5, after the pressure oil is throttled by the one-way throttle valve 4, one part of the pressure oil returns to the hydraulic oil tank 2 through the control valve group 3, and the other part of the pressure oil enters the large cavity of the leveling oil cylinder 6 to push a piston rod of the leveling oil cylinder 6 to extend out, so that power is provided for the outward swing of the bucket rod 10, the gravitational potential energy of the descending part of the movable arm 9 is converted into power for the outward swing of the bucket rod 10, and the energy-saving effect is achieved.
As shown in fig. 1, a main overflow valve 3-3 is arranged between an oil inlet P of the control valve group 3 and an oil return port T of the control valve group 3, and the main overflow valve 3-3 is used for limiting the highest service pressure of the system. Furthermore, overload overflow valves 3-4 are respectively arranged between the oil port B1 of the control valve group 3 and the oil return port T of the control valve group 3, between the oil port a1 of the control valve group 3 and the oil return port T of the control valve group 3, between the oil port B2 of the control valve group 3 and the oil return port T of the control valve group 3, and between the oil port a2 of the control valve group 3 and the oil return port T of the control valve group 3. The overload overflow valve 3-4 can protect the oil cylinder when the oil cylinder encounters severe impact.
As shown in fig. 1, a one-way throttle valve 4 is arranged between the control valve group 3 and the large cavity of the boom cylinder 5, and an oil outlet of the one-way valve of the one-way throttle valve 4 is connected with the large cavity of the boom cylinder 5. When the movable arm 9 descends, the large cavity of the movable arm oil cylinder 5 returns oil and is throttled, the descending speed of the movable arm 9 can be effectively controlled, and the damage to the oil cylinder caused by the fact that the small cavity of the movable arm oil cylinder 5 is emptied due to the fact that the movable arm 9 descends too fast is prevented.
As an improvement of the embodiment, the oil inlet of the three-position directional control valve I3-1 and the oil inlet of the three-position directional control valve II 3-2 are both provided with one-way valves. And hydraulic oil backflow is avoided when the oil cylinder encounters severe impact.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (6)
1. An energy-saving hydraulic system for a working device of a face shovel excavator is characterized in that: the hydraulic control system comprises a control valve group (3), a movable arm oil cylinder (5) and a bucket rod oil cylinder (8), wherein the control valve group (3) comprises a three-position reversing valve I (3-1) and a three-position reversing valve II (3-2); two working oil ports of the three-position reversing valve I (3-1) are respectively connected with a large cavity of the bucket rod oil cylinder (8) and a small cavity of the bucket rod oil cylinder (8); two working oil ports of the three-position reversing valve II (3-2) are respectively connected with a large cavity of the movable arm oil cylinder (5) and a small cavity of the movable arm oil cylinder (5); an oil inlet of the three-position directional valve I (3-1) and an oil inlet of the three-position directional valve II (3-2) are both connected with the pump (1), and an oil return port of the three-position directional valve I (3-1) and an oil return port of the three-position directional valve II (3-2) are both connected with the hydraulic oil tank (2); the hydraulic bucket is characterized by further comprising a leveling oil cylinder (6) arranged between the movable arm and the bucket rod, a large cavity of the leveling oil cylinder (6) is connected with a large cavity of the movable arm oil cylinder (5), and a small cavity of the leveling oil cylinder (6) is connected with a small cavity of the movable arm oil cylinder (5).
2. The energy efficient hydraulic system for a face shovel excavator work implement of claim 1, wherein: the control valve group (3) is an integrated valve, a first working oil port of the three-position reversing valve I (3-1) is connected with an oil port B1 of the control valve group (3), and a second working oil port of the three-position reversing valve I (3-1) is connected with an oil port A1 of the control valve group (3); a first working oil port of the three-position reversing valve II (3-2) is connected with an oil port B2 of the control valve group (3), and a second working oil port of the three-position reversing valve II (3-2) is connected with an oil port A2 of the control valve group (3); an oil inlet of the three-position reversing valve I (3-1) and an oil inlet of the three-position reversing valve II (3-2) are connected with an oil inlet P of the control valve bank (3), and an oil return port of the three-position reversing valve I (3-1) and an oil return port of the three-position reversing valve II (3-2) are connected with an oil return port T of the control valve bank (3).
3. The energy efficient hydraulic system for a face shovel excavator working apparatus as claimed in claim 2, characterized in that: and a main overflow valve (3-3) is arranged between an oil inlet P of the control valve group (3) and an oil return port T of the control valve group (3).
4. The energy efficient hydraulic system for a face shovel excavator working apparatus as claimed in claim 2, characterized in that: overload overflow valves are arranged between an oil port B1 of the control valve group (3) and an oil return port T of the control valve group (3), between an oil port A1 of the control valve group (3) and the oil return port T of the control valve group (3), between an oil port B2 of the control valve group (3) and the oil return port T of the control valve group (3) and between an oil port A2 of the control valve group (3) and the oil return port T of the control valve group (3).
5. The energy-saving hydraulic system for a working device of a face shovel excavator according to any one of claims 1 to 4, wherein: a one-way throttle valve (4) is arranged between the control valve group (3) and the large cavity of the movable arm oil cylinder (5), and an oil outlet of a one-way valve of the one-way throttle valve (4) is connected with the large cavity of the movable arm oil cylinder (5).
6. The energy-saving hydraulic system for a working device of a face shovel excavator according to any one of claims 1 to 4, wherein: and the oil inlet of the three-position reversing valve I (3-1) and the oil inlet of the three-position reversing valve II (3-2) are respectively provided with a one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210635669.2A CN114934552B (en) | 2022-06-07 | 2022-06-07 | Energy-saving hydraulic system for working device of front shovel excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210635669.2A CN114934552B (en) | 2022-06-07 | 2022-06-07 | Energy-saving hydraulic system for working device of front shovel excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114934552A true CN114934552A (en) | 2022-08-23 |
| CN114934552B CN114934552B (en) | 2023-12-19 |
Family
ID=82866649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210635669.2A Active CN114934552B (en) | 2022-06-07 | 2022-06-07 | Energy-saving hydraulic system for working device of front shovel excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114934552B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10306470A (en) * | 1997-04-30 | 1998-11-17 | Hitachi Constr Mach Co Ltd | Hydraulic drive device of construction machine |
| CN104328812A (en) * | 2014-09-23 | 2015-02-04 | 徐州徐工挖掘机械有限公司 | Hydraulic system for realizing flat pushing function of forward excavator |
| CN108316389A (en) * | 2018-04-16 | 2018-07-24 | 福建晋工机械有限公司 | A kind of wheel excavator multi-way valve |
| 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 |
| CN112127400A (en) * | 2020-10-09 | 2020-12-25 | 南京工程学院 | Excavator bucket follow-up control system and method |
| CN113882459A (en) * | 2021-09-30 | 2022-01-04 | 徐州徐工挖掘机械有限公司 | Excavator energy recovery system and excavator |
-
2022
- 2022-06-07 CN CN202210635669.2A patent/CN114934552B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10306470A (en) * | 1997-04-30 | 1998-11-17 | Hitachi Constr Mach Co Ltd | Hydraulic drive device of construction machine |
| CN104328812A (en) * | 2014-09-23 | 2015-02-04 | 徐州徐工挖掘机械有限公司 | Hydraulic system for realizing flat pushing function of forward excavator |
| CN108316389A (en) * | 2018-04-16 | 2018-07-24 | 福建晋工机械有限公司 | A kind of wheel excavator multi-way valve |
| 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 |
| CN112127400A (en) * | 2020-10-09 | 2020-12-25 | 南京工程学院 | Excavator bucket follow-up control system and method |
| CN113882459A (en) * | 2021-09-30 | 2022-01-04 | 徐州徐工挖掘机械有限公司 | Excavator energy recovery system and excavator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114934552B (en) | 2023-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101435451B (en) | Movable arm potential energy recovery method and apparatus of hydraulic excavator | |
| CN108755794B (en) | Hydraulic excavator based on hydraulic-electric composite drive | |
| CN101775822B (en) | Excavator swing arm descending hydraulic control loop | |
| CN109882457B (en) | energy regeneration system of combined hydraulic cylinder | |
| CN104452868B (en) | Double-hydraulic-cylinder mixed drive control system | |
| CN108978774B (en) | Series-parallel hybrid power system for excavator | |
| CN107061430A (en) | The hoisting system of minus flow hydraulic circuit control | |
| CN109113120A (en) | A kind of electric-hydraulic combined swing arm energy recycling system | |
| CN106223380B (en) | A kind of hydraulic hybrid excavator system | |
| CN111649022A (en) | Single-cylinder bolt control valve group, horizontal bar bolt control system and crane | |
| CN205277958U (en) | Dig hydraulic system of rig mast soon | |
| CN113048104B (en) | Energy recovery system of hydraulic load operation platform | |
| CN108799258B (en) | Movable arm energy recovery system | |
| CN108915005B (en) | Excavator movable arm compensation hydraulic system | |
| CN201679029U (en) | Hydraulically controlled loop on the boom descending of excavator | |
| CN114934552A (en) | Energy-saving hydraulic system for working device of face shovel excavator | |
| CN214661148U (en) | Single-pump-source load port independent load sensitive energy-saving excavator hydraulic system | |
| CN107964992B (en) | Energy-saving hydraulic system of wood clamping fork loader | |
| CN115095567A (en) | Hydraulic system for leveling cylinder of face shovel hydraulic excavator and control method | |
| CN211778291U (en) | Multi-way valve of excavator | |
| CN110671393B (en) | Energy recycling device | |
| CN109083894A (en) | A kind of electric-hydraulic combined swing arm energy recycling system | |
| CN202073855U (en) | Oil pressure driving control device | |
| CN217873512U (en) | Bucket rod oil cylinder retraction action energy-saving hydraulic system, working device and engineering machinery | |
| CN206128153U (en) | Hydraulic hybrid excavator system |
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 |