CN213682258U - Hydraulic regeneration structure for descending of movable arm of excavator - Google Patents
Hydraulic regeneration structure for descending of movable arm of excavator Download PDFInfo
- Publication number
- CN213682258U CN213682258U CN202022606246.7U CN202022606246U CN213682258U CN 213682258 U CN213682258 U CN 213682258U CN 202022606246 U CN202022606246 U CN 202022606246U CN 213682258 U CN213682258 U CN 213682258U
- Authority
- CN
- China
- Prior art keywords
- regeneration
- oil
- flow passage
- movable arm
- cavity
- 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
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses a hydraulic pressure regeneration structure for descending of a movable arm of an excavator, which comprises a reversing valve for controlling the expansion of a movable arm oil cylinder, wherein under the condition of controlling the descending of the movable arm, the reversing valve is connected with a large cavity inlet of a large cavity oil return of the movable arm oil cylinder to be connected with a large cavity oil return flow passage and a regeneration flow passage in a shunting way, the large cavity oil return flow passage is connected with an oil tank through an oil return port, and the regeneration flow passage is connected with an oil inlet way of a small cavity of the movable arm oil cylinder in a bypass; and the large-cavity oil return flow passage is provided with adjustable damping. The utility model provides a pair of a hydraulic pressure regeneration structure for excavator swing arm descends promotes excavator swing arm action work efficiency through the loss of pressure that reduces regeneration runner and to the control of regeneration flow, effectively realizes the recycle to swing arm decline in-process potential energy.
Description
Technical Field
The utility model belongs to excavator hydraulic pressure technique, concretely relates to hydraulic pressure regeneration structure for excavator swing arm descends.
Background
The hydraulic multi-way valve plays a role in operating an actuating element in the energy-saving excavator, has the advantages of compact structure, simple pipeline, small pressure loss and the like, and realizes the forward and reverse work of the actuator by changing the flow direction of high-pressure oil and low-pressure oil through the movement of the valve core.
The valve core regeneration structure adopted by the prior multi-way valve product of the small excavator adopts a hydraulic oil regeneration technology, potential energy in the process of moving of executing elements such as a movable arm and the like is utilized to do work and is converted into hydraulic energy for recovery, but the problem of large pressure loss of a regeneration flow channel exists in the working process of the multi-way valve, so that the energy loss and the overall efficiency cannot achieve the expected effect; in addition, the conventional hydraulic regeneration structure cannot control the regeneration flow rate to change the boom lowering speed.
Disclosure of Invention
The utility model provides a technical problem be: the hydraulic regeneration structure for lowering the movable arm of the excavator aims at solving the problem that the regeneration hydraulic flow cannot be controlled by the existing excavator regeneration structure, so that the regeneration pressure loss is large.
The utility model discloses a following technical scheme realizes:
a hydraulic regeneration structure for descending of a movable arm of an excavator comprises a reversing valve for controlling the expansion of a movable arm oil cylinder, wherein in the state of controlling the descending of the movable arm, the reversing valve is connected with a large cavity inlet 6 for returning oil in a large cavity of the movable arm oil cylinder and is connected with a large cavity oil return flow passage 2 and a regeneration flow passage 5 in a shunting manner, the large cavity oil return flow passage 2 is connected with an oil tank through an oil return opening, and the regeneration flow passage 5 is connected with an oil inlet way of a small cavity of the movable arm oil cylinder in a bypassing manner to; and an adjustable damper 1 is arranged on the large-cavity oil return flow passage 2.
In the hydraulic regeneration structure for descending of the movable arm of the excavator in the scheme, further, the regeneration flow channel 5 is provided with the regeneration one-way valve 7, and the regeneration one-way valve 7 keeps the one-way conduction of oil in the regeneration flow channel 5 to the oil inlet channel of the small cavity of the movable arm oil cylinder.
In the hydraulic regeneration structure for descending of the movable arm of the excavator in the scheme, further, a load one-way valve 8 is arranged on an oil inlet path of a small cavity of the movable arm oil cylinder, and the load one-way valve 8 prevents oil in the regeneration flow channel 5 from flowing back to the oil inlet path of the small cavity of the movable arm oil cylinder.
In the hydraulic regeneration structure for descending of the movable arm of the excavator in the scheme, further, the large-cavity oil return flow passage 2, the regeneration flow passage 5 and the regeneration bridge circuit 9 are all integrally cast flow passages inside the valve body of the reversing valve.
In the hydraulic regeneration structure for descending of the movable arm of the excavator in the scheme, further, the adjustable damper 1 is installed on the valve body corresponding to the large-cavity oil return flow channel 2.
In the hydraulic regeneration structure for descending of the movable arm of the excavator in the above scheme, further, the regeneration check valve 7 is installed on a valve body corresponding to the regeneration flow channel 5.
In the hydraulic regeneration structure for descending the movable arm of the excavator in the above scheme, further, the load check valve 8 is mounted on a valve body corresponding to the regeneration bridge circuit 9.
The utility model leads the oil in the big cavity of the movable arm oil cylinder to the small cavity of the oil cylinder when the movable arm descends through the regeneration bridge circuit, thereby improving the descending speed, improving the working efficiency and reducing the energy loss; the flow of the return oil entering the small cavity is controlled by the return oil of the large-cavity oil return passage through adjustable damping, the control of the flow of the return oil is realized by adjusting the damping, the flow of the regeneration flow passage is further changed, the flow of the regeneration flow passage is controllable, and the adjustment of the descending speed of the movable arm is realized; the utility model discloses with the pipeline connection of regeneration oil circuit setting inside the flexible switching-over valve of control movable arm hydro-cylinder, having practiced thrift regeneration oil circuit, regeneration structure in the switching-over valve adopts the mode of valve body casting runner to make regeneration runner have great regeneration passage area, can obtain more regeneration flow, effectively prevents that movable arm hydro-cylinder loculus from inhaling the sky in the movable arm decline.
To sum up, the utility model provides a pair of a hydraulic pressure regeneration structure for excavator swing arm descends promotes excavator swing arm action work efficiency through the loss of pressure that reduces regeneration runner and to the control of regeneration flow, effectively realizes the recycle to swing arm decline in-process potential energy.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic diagram of an internal hydraulic pressure regeneration structure of a reversing valve in an embodiment.
Fig. 2 is a schematic diagram of an oil passage of the hydraulic regeneration structure in the embodiment.
Reference numbers in the figures: 1-adjustable damping, 2-large cavity oil return flow passage, 3-oil return port, 4-small cavity oil return flow passage, 5-regeneration flow passage, 6-large cavity inlet, 7-regeneration one-way valve, 8-load one-way valve, 9-regeneration bridge circuit, 10-small cavity oil port, 11-valve core, 12-oil cylinder small cavity, 13-oil cylinder large cavity, 14-movable arm oil cylinder and 15-valve body.
Detailed Description
Examples
Referring to fig. 1 and 2, the reversing valve in the figure is used for telescopic reversing of a boom cylinder of an excavator, and a regeneration structure arranged inside a valve body of the reversing valve is a specific embodiment of the invention. The reversing valve of the embodiment is a three-position six-way valve, and when a valve core of the reversing valve moves to an upper position for working, the boom cylinder 14 is correspondingly controlled to contract, so that the boom is driven to descend.
In the working state, oil enters into a small oil cylinder cavity 12 of a movable arm oil cylinder 14, oil returns from a large oil cylinder cavity 13, an oil return line of the large oil cylinder cavity 13 is connected to a large cavity inlet 6 inside a reversing valve, the large cavity inlet 6 inside the reversing valve is connected with a large cavity oil return flow passage 2 and a regeneration flow passage 5 in a shunting manner, wherein the large cavity oil return flow passage 2 is connected with an oil tank through an oil return port 3 of the reversing valve, the regeneration flow passage 5 is connected with the side of an oil inlet path of the small oil cylinder cavity of the movable arm to form a regeneration bridge passage 9, the oil return of the large oil cylinder cavity 13 has higher oil return pressure due to the compression of gravitational potential energy generated by the descending of the movable arm, one part of the oil return returns to the oil tank through the large cavity oil return flow passage 2, the other part of the oil return flows into the small oil cylinder cavity 12 of the movable arm oil cylinder 14 through the regeneration flow passage, in addition, oil passing through the regeneration bridge circuit enters the small cavity to accelerate the descending speed of the movable arm and prevent the small cavity from being sucked empty. In the embodiment, the adjustable damping 1 is arranged on the large-cavity oil return flow passage 2, and the oil return flow entering the large-cavity oil return flow passage 2 is controlled by controlling the oil return damping of the large-cavity oil return flow passage 2, so that the regeneration flow entering the regeneration flow passage 5 is adjusted, and the speed required by the descending of the movable arm is obtained.
In order to ensure the flow direction of oil in the regeneration flow passage 5 and the regeneration bridge circuit 9, a regeneration one-way valve 7 is arranged on the regeneration flow passage 5, and the regeneration one-way valve 7 keeps the one-way conduction of the oil in the regeneration flow passage 5 to the oil inlet path of the small cavity of the movable arm oil cylinder; meanwhile, a load one-way valve 8 is arranged on the oil inlet path of the movable arm oil cylinder small cavity, and the load one-way valve 8 keeps one-way conduction along the oil inlet direction of the oil inlet oil cylinder small cavity to prevent the oil in the regeneration flow channel 5 from flowing back to the oil inlet path of the movable arm oil cylinder small cavity.
The reversing valve comprises a valve body 15 and a valve core 11, the embodiment arranges the regeneration oil path structure aiming at the descending of the movable arm in the reversing valve, wherein, the flow channel of the large cavity inlet 6 which is switched on when the reversing valve is switched to the upper working state is arranged on the assembly surface of the valve body 15 and the valve core 11, the oil cylinder large cavity 13 of the movable arm oil cylinder is connected to the large cavity oil port (not shown in the back of figure 1) on the valve body 15 through the external oil pipe and is communicated with the large cavity inlet 6, the large cavity oil return flow channel 2 and the regeneration flow channel 5 are two casting flow channels which are communicated through the flow channel of the large cavity inlet 6 in the valve body 15, the large cavity oil return flow channel 2 and the small cavity oil return flow channel 2 originally provided by the valve body 15 are communicated with the oil return port 3 on the valve body together, the regeneration flow channel 5 is by-, and a regeneration bridge circuit 9 formed by converging and converging in the valve body 15 is connected to a small cavity oil port 10 and is connected to a cylinder small cavity 12 of the boom cylinder through an external oil pipe. The adjustable damper 1 is directly arranged on a valve body corresponding to the large-cavity oil return flow passage 2, the regeneration one-way valve 7 is arranged on a valve body corresponding to the regeneration flow passage 5, the load one-way valve 8 is arranged on a valve body corresponding to the regeneration bridge circuit 9, the whole regeneration structure is integrally arranged on a reversing valve body, and the connection mode of an external oil pipe of the whole reversing valve is the same as that of a common oil pipe.
The working principle of the embodiment is as follows: in the descending process of a movable arm, a valve core 11 of the reversing valve works upwards, a large cavity inlet 6 in a valve body 15 is connected with a large oil cylinder cavity 13 of a movable arm oil cylinder 14, a small cavity oil port 10 is connected with a small oil cylinder cavity 12, return oil in the large oil cylinder cavity enters the large cavity inlet 6 and then is divided into two paths, namely a large cavity return oil path 2 and a regeneration flow path 5, wherein part of the return oil in the large cavity return oil path 2 returns to the oil tank through an oil return port 3 in the valve body, part of the return oil in the regeneration flow path 5 is converged with an oil inlet path in the small oil cylinder cavity and then enters the small oil cylinder cavity 12 through the small cavity oil port 10 through a regeneration bridge 9, and the potential energy of. The adjustable damping 1 at the large-cavity oil return flow passage 2 is used for adjusting two paths of flow, the oil flow from the large-cavity oil return flow passage 2 to the oil return port 3 is directly adjusted by adjusting the adjustable damping 1, the oil of the part of return oil tank changes, so that the oil regeneration flow entering the regeneration flow passage 5 is adaptive to change, and finally the speed required by the descending of the movable arm is adjusted.
In the present embodiment, only the regenerative control of the boom lowering is described when the reversing valve is switched to the upper position, and other positions of the reversing valve may not be changed from the boom control manner of the existing excavator, which is not described herein again.
The above embodiments describe the basic principle, main features and advantages of the present invention, and those skilled in the art should understand that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only for explaining the specific working principle of the present invention. Any simple modification and change of the above embodiments according to the technical substance of the utility model are still within the protection scope of the technical solution of the utility model.
Claims (7)
1. A hydraulic pressure regeneration structure for an excavator boom to descend is characterized in that: the device comprises a reversing valve for controlling the expansion of a movable arm oil cylinder, wherein the reversing valve is connected with a large cavity inlet (6) for returning oil from a large cavity of the movable arm oil cylinder in a shunting manner and is connected with a large cavity oil return flow passage (2) and a regeneration flow passage (5) under the condition of controlling the descending of a movable arm, the large cavity oil return flow passage (2) is connected with an oil tank through an oil return opening, and the regeneration flow passage (5) is connected with an oil inlet path of a small cavity of the movable arm oil cylinder in a bypass manner to form a;
and an adjustable damping (1) is arranged on the large-cavity oil return flow passage (2).
2. The hydraulic regenerative structure for the lowering of the boom of the excavator according to claim 1, wherein: and a regeneration one-way valve (7) is arranged on the regeneration flow passage (5), and the regeneration one-way valve (7) keeps the one-way conduction of oil in the regeneration flow passage (5) to the oil inlet channel of the movable arm oil cylinder small cavity.
3. The hydraulic regenerative structure for the lowering of the boom of the excavator according to claim 2, wherein: and a load one-way valve (8) is arranged on the movable arm oil cylinder small cavity oil inlet path, and the load one-way valve (8) prevents oil in the regeneration flow channel (5) from flowing backwards to the movable arm oil cylinder small cavity oil inlet path.
4. The hydraulic regenerative structure for the lowering of the boom of the excavator according to claim 3, wherein: the large-cavity oil return flow passage (2), the regeneration flow passage (5) and the regeneration bridge circuit (9) are all integrally cast flow passages inside a valve body of the reversing valve.
5. The hydraulic regenerative structure for the lowering of the boom of the excavator according to claim 4, wherein: the adjustable damping (1) is arranged on the valve body corresponding to the large-cavity oil return flow passage (2).
6. The hydraulic regenerative structure for the lowering of the boom of the excavator according to claim 5, wherein: the regeneration one-way valve (7) is arranged on the valve body corresponding to the regeneration flow channel (5).
7. The hydraulic regenerative structure for the lowering of a boom of an excavator according to claim 6, wherein: and the load one-way valve (8) is arranged on the valve body corresponding to the regeneration bridge circuit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022606246.7U CN213682258U (en) | 2020-11-12 | 2020-11-12 | Hydraulic regeneration structure for descending of movable arm of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022606246.7U CN213682258U (en) | 2020-11-12 | 2020-11-12 | Hydraulic regeneration structure for descending of movable arm of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213682258U true CN213682258U (en) | 2021-07-13 |
Family
ID=76731369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022606246.7U Active CN213682258U (en) | 2020-11-12 | 2020-11-12 | Hydraulic regeneration structure for descending of movable arm of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213682258U (en) |
-
2020
- 2020-11-12 CN CN202022606246.7U patent/CN213682258U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201738368U (en) | Hydraulic damping control loop of excavator | |
| CN204985186U (en) | Automatically controlled switching core hydraulic system and engineering machinery | |
| CN113882459B (en) | Excavator energy recovery system and excavator | |
| WO2023092667A1 (en) | Hydraulic system with electro-proportional control multi-working-position valve, and control method thereof | |
| CN109826838A (en) | A kind of load holding valve | |
| CN102808433B (en) | Hydraulic circuit and method for controlling compound actions of excavator movable arm | |
| CN213682258U (en) | Hydraulic regeneration structure for descending of movable arm of excavator | |
| CN111997947B (en) | Hydraulic system of front shovel excavator opening and closing bucket | |
| CN105387015A (en) | Energy-saving hydraulic valve | |
| CN104235003B (en) | Plunger pump control valve and its control method | |
| CN209620158U (en) | A kind of excavator hydraulic control system | |
| CN112983909B (en) | Movable arm hydraulic system | |
| CN104912137A (en) | Excavator hydraulic system with energy feedback function | |
| JP4753307B2 (en) | Hydraulic control system for work machines | |
| CN104030199B (en) | Forklift hydraulic system with bypass oil way throttling speed regulation loop | |
| CN202787344U (en) | Hydraulic circuit used for controlling compound motion of swing arm of electric shovel | |
| CN109706997A (en) | A kind of excavator hydraulic control system and working method | |
| CN2505632Y (en) | Pilot-controlled multi-way reversing valve | |
| CN201507494U (en) | Pilot valve block of loader operation device | |
| CN114542540A (en) | Flow regeneration hydraulic system and engineering machinery | |
| CN211474417U (en) | Open hydraulic pump and open hydraulic system | |
| CN210621812U (en) | Excavator swing arm descending hydraulic control system and excavator | |
| CN209430509U (en) | Hydraulic system and trepan | |
| CN109854558A (en) | Hydraulic system and engineering truck | |
| CN109235534B (en) | Multi-path hydraulic system of hydraulic excavator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |