CN207597461U - A kind of excavator swing arm hydraulic system - Google Patents
A kind of excavator swing arm hydraulic system Download PDFInfo
- Publication number
- CN207597461U CN207597461U CN201721551208.8U CN201721551208U CN207597461U CN 207597461 U CN207597461 U CN 207597461U CN 201721551208 U CN201721551208 U CN 201721551208U CN 207597461 U CN207597461 U CN 207597461U
- Authority
- CN
- China
- Prior art keywords
- valve
- swing arm
- main
- oil
- hydraulic system
- 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)
Abstract
The utility model is related to technical field of engineering machinery, more particularly, to a kind of excavator swing arm hydraulic system.The excavator swing arm hydraulic system includes：Main pump, main valve, boom cylinder and logical valve；The main pump is connect with the oil inlet of the main valve, and the logical valve is set on the oil circuit between the main pump and the main valve oil inlet；First actuator port of the main valve is connected with the rodless cavity of the boom cylinder, and the second actuator port of the main valve is connected with the rod chamber of the boom cylinder.The utility model realizes the flow of on-demand optimal allocation main pump, and handling and complete machine coordination is obviously improved.
Description
Technical field
The utility model is related to technical field of engineering machinery, more particularly, to a kind of excavator swing arm hydraulic system.
Background technology
At present, the single throttling spool control of Hydraulic Excavator's Boom control loop for descending and the group of valve core inside regenerative circuit
It closes and uses.But existing control mode has the following problems：1st, swing arm declines flow and is easily emptied, and emptying phenomenon is very easy to
Cause the hydraulic faults such as cavitation erosion and air pocket；2nd, when swing arm is declined with dipper or scraper bowl excavation composite move, since swing arm is by dead weight
Decline, speed is not easily controlled, and dipper is not readily reachable by satisfied speed with scraper bowl, and handling difference, working efficiency is low, oil
Consumption is high, less economical.
The information for being disclosed in the background technology part is merely intended to deepen the reason to the general background technology of the utility model
Solution, and be not construed as recognizing or to imply that the information is formed in any form known to those skilled in the art existing
Technology.
Utility model content
It is in the prior art to solve the purpose of this utility model is to provide a kind of excavator swing arm hydraulic system
Swing arm declines the non-uniform technical problem of assignment of traffic.
To achieve these goals, the utility model uses following technical scheme：
In a first aspect, the utility model provides a kind of excavator swing arm hydraulic system, including：Main pump, main valve, swing arm
Oil cylinder and logical valve；The main pump is connect with the oil inlet of the main valve, and the logical valve is set to the main pump and the master
On oil circuit between valve oil inlet；First actuator port of the main valve is connected with the rodless cavity of the boom cylinder, the master
Second actuator port of valve is connected with the rod chamber of the boom cylinder.
As a kind of further technical solution, which further includes：Logic control instruction switches
Valve, the logic control instruction switching valve are connected with the logical valve, for controlling the aperture of the logical valve.
As a kind of further technical solution, the bypass hydraulic fluid port of the main valve is connected to bleed off circuit, the main valve
Oil inlet is connected to swing arm working connection, and the logical valve is set on the swing arm working connection, and the bleed off circuit is moved with described
Arm working connection is all connected to the oil outlet of main pump.
As a kind of further technical solution, the oil return opening of the main valve is connected to oil return circuit.
As a kind of further technical solution, the first actuator port of the main valve and the rodless cavity of the boom cylinder
Between oil circuit be additionally provided with luffing jib maintaining valve.
As a kind of further technical solution, the luffing jib maintaining valve is connected with luffing jib maintaining valve and releases switching valve.
As a kind of further technical solution, the boom cylinder includes the first oil cylinder and the second oil cylinder, and described first
The rodless cavity of oil cylinder and the second oil cylinder is connected by the first distribution pipeline, and the rod chamber of first oil cylinder and the second oil cylinder passes through
Second distribution pipeline is connected, and the first actuator port of the main valve is connected with first distribution pipeline, and the second of the main valve
Actuator port is connected with second distribution pipeline.
As a kind of further technical solution, the oil outlet of the main pump is also associated with main overflow valve, the main overflow
Valve is on the oil circuit between logical valve and the oil outlet of main pump.
As a kind of further technical solution, the main overflow valve is connected with hydraulic oil container.
Using the technical solution of above-mentioned second aspect, the utility model has the advantages that：
The utility model by the way that logical valve is set on the oil circuit between main pump and main valve oil inlet, in this way swing arm into
During row composite move, the opening of logical valve is controlled according to signal, realizes the flow of on-demand optimal allocation main pump, it is handling and whole
It is motor-driven to be obviously improved as harmony.
Second aspect, the utility model provide a kind of control method according to the excavator swing arm hydraulic system,
Include the following steps：
When swing arm works independently, throttle command is not sent to logical valve, logical valve is into maximum open state, the oil of main pump
Road is connected through logical valve, main valve with boom cylinder；
When swing arm and other executing agency's composite moves, throttle command is sent to logical valve, logical valve is opened by adjusting
The flow of main pump is preferentially distributed to other executing agencies by mouth to distribute according to need the flow of main pump.
Using the technical solution of above-mentioned second aspect, the utility model has the advantages that：
The utility model by the way that logical valve is set on the oil circuit between main pump and main valve oil inlet, in this way swing arm into
During row composite move, the opening of logical valve is controlled according to signal, realizes the flow of on-demand optimal allocation main pump, it is handling and whole
It is motor-driven to be obviously improved as harmony.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution of the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness
Under the premise of labour, other attached drawings are can also be obtained according to these attached drawings.
Fig. 1 is the schematic diagram of excavator swing arm hydraulic system that the utility model embodiment provides.
Icon：1- main pumps；2- logical valves；4- logic control instruction switching valves；5- hydraulic oil containers；The main overflow valves of 6-；7- is moved
Arm working connection；8- bleed off circuits；9- oil return circuits；10- main valves；11- luffing jib maintaining valves release switching valve；12- luffing jib maintaining valves；
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet
Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality
Novel protected range.
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein
Described specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.
Embodiment one
With reference to shown in Fig. 1, a kind of excavator swing arm hydraulic system is present embodiments provided, including：Main pump 1, main valve 10,
Boom cylinder and logical valve 2；Main pump 1 is connect with the oil inlet of main valve 10, and logical valve 2 is set to main pump 1 and 10 oil inlet of main valve
Between oil circuit on；First actuator port of main valve 10 is connected with the rodless cavity of boom cylinder (the big chamber of swing arm), and the of main valve 10
Two actuator ports are connected with the rod chamber (the small chamber of swing arm) of boom cylinder.Certainly, the oil return opening of main valve 10 is connected to oil return circuit
9。
As it can be seen that when swing arm works independently, do not send throttle command to logical valve 2, logical valve 2 into maximum open state,
The oil circuit of main pump 1 is connected through logical valve 2, main valve 10 with boom cylinder.When swing arm and during other executing agency's composite moves, to patrolling
It collects valve 2 and sends throttle command, logical valve 2 is excellent by the flow of main pump 1 by adjusting opening to distribute according to need the flow of main pump 1
Other executing agencies are first distributed to, realize the flow of on-demand optimal allocation main pump 1, handling and complete machine coordination significantly changes
It is kind.
In the present embodiment, logical valve 2 is also known as cone valve, and control mode can divide single guiding, multiple boot, flow control, electromagnetism
Control etc..
As a kind of further technical solution, which further includes：Logic control instruction switches
Valve 4, logic control instruction switching valve 4 are connected with logical valve 2, for the aperture of control logic valve 2.Wherein, logic control instruction
One end connection logic control oil circuit of switching valve 4, the other end of logic control instruction switching valve 4 connect a draining road.
In the present embodiment, it is preferred that the bypass hydraulic fluid port of main valve 10 is connected to bleed off circuit 8, the oil inlet connection of main valve 10
In swing arm working connection 7, logical valve 2 is set on swing arm working connection 7, and bleed off circuit 8 is all connected to main pump 1 with swing arm working connection 7
Oil outlet.Wherein, bleed off circuit 8 is in main valve 10 when being in middle position, can by by bleed off circuit 8 by the pressure of main pump 1
Oil is pumped to other positions.
Wherein, the both ends of 10 core of main valve and corresponding pilot signal oil circuit connection, such as：The big chamber guide's oil circuit of swing arm,
The small chamber guide's oil circuit of swing arm.
When the big chamber guide's oil circuit fuel feeding of swing arm, the oil inlet of main valve 10 is connected with the first actuator port of main valve 10, main
Second actuator port of valve 10 is connected with the oil return opening of main valve 10.
Certainly, it is additionally provided with regenerative circuit inside the main valve 10.
So-called " regenerative circuit " refers to, a compensation channel is set on the spool of main valve 10, in the compensation channel
Equipped with check valve, when the main valve 10 is in the rod chamber fuel feeding for making boom cylinder, the working position of rodless cavity oil return, the benefit
The oil supply gallery and drainback passage in the valve body of channel connection main valve 10 are repaid, the hydraulic oil for flowing back to fuel tank originally in this way quickly enters
Rod chamber plays the role of acceleration, using its own gravity potential energy, so as to reduce the energy consumption of pump, this effect quilt in the field of business
Visually it is known as " regenerative circuit ".
In the present embodiment, main valve 10 is preferably three six pass two-way pilot operated directional control valves with regeneration function, wherein, it is described
It is set on the spool of three six pass two-way pilot operated directional control valves there are one compensation channel, check valve, institute is equipped in the compensation channel
When stating three six pass two-way pilot operated directional control valves in the working position of rod chamber fuel feeding rodless cavity oil return for making boom cylinder, the benefit
Repay the oil supply gallery and drainback passage in the valve body of channel three six pass two-way pilot operated directional control valves of connection.
In the present embodiment, as a kind of further technical solution, the first actuator port of main valve 10 and boom cylinder
Oil circuit is additionally provided with luffing jib maintaining valve 12 between rodless cavity.In the present embodiment, 12 main function of luffing jib maintaining valve is when swing arm is grasped
When vertical pole returns to middle position, the anti-stopper arms of the meeting of luffing jib maintaining valve 12 fall naturally, and swing arm is made to be maintained in situ.
As a kind of further technical solution, luffing jib maintaining valve 12 is connected with luffing jib maintaining valve and releases switching valve 11, moves
One end connection luffing jib maintaining valve 12 that arm keeps valve to release switching valve 11 releases holding function signal oil circuit, and luffing jib maintaining valve releases
The other end connection draining road of switching valve 11, luffing jib maintaining valve release switching valve 11 for controlling luffing jib maintaining valve 12.
In the present embodiment, boom cylinder includes the rodless cavity of the first oil cylinder and the second oil cylinder, the first oil cylinder and the second oil cylinder
It is connected by the first distribution pipeline, the rod chamber of the first oil cylinder and the second oil cylinder is connected by the second distribution pipeline, main valve 10
First actuator port is connected with the first distribution pipeline, and the second actuator port of main valve 10 is connected with the second distribution pipeline.
In the present embodiment, as a kind of further technical solution, the oil outlet of main pump 1 is also associated with main overflow valve 6, main
Overflow valve 6 is located on the oil circuit between logical valve 2 and the oil outlet of main pump 1.
Corresponding, main overflow valve 6 is connected with hydraulic oil container 5.
To sum up, the operation principle of the swing arm hydraulic control of the present embodiment is：
During swing arm single movement, swing arm main valve 10 receives the signal of swing arm guide's oil circuit, spool switching position, by main pump 1
Oil circuit and boom cylinder oil communication, pass through the rise and fall of the flexible realization swing arm of oil cylinder, the speed of swing arm single movement
Speed can be controlled by the size of pilot signal.At this moment the logical valve 2 of swing arm does not receive throttle command, in maximum open.
In the case of swing arm and other executing agency's composite moves because hydraulic oil can preferentially be flowed in composite move it is negative
Small executing agency is carried, so as to cause the problems such as composite move is uncoordinated, and speed is slow, at this moment logical valve 2 receives instruction to main oil
The flow of main pump 1 is preferentially distributed to other actions by road meter in, and the ratio of assignment of traffic can be according to the big of logical order
It is small to control, so as to fulfill flow demand assignment function；
When emptying phenomenon occur or to carry out the operation of branch vehicle, cancel throttle command, 1 flow normal supply swing arm of main pump.
Therefore, the present embodiment excavator swing arm hydraulic system has the advantages that：
1st, built in logical valve 2, without outside pipe arrangement, mounting arrangement is simple and reliable.
2nd, swing arm emptying phenomenon disappears.
3rd, swing arm single movement, cut-out throttling oil circuit, pumpage become smaller, and fever is few, energy saving.
4th, swing arm composite move controls the opening of logical valve 2 according to signal, realizes flow best on demand in batches, behaviour
Control property and complete machine coordination are obviously improved.
Embodiment two
Present embodiments provide a kind of control method according to one excavator swing arm hydraulic system of embodiment.
First, the present embodiment first introduces the main composition of excavator swing arm hydraulic system.
With reference to shown in Fig. 1, excavator swing arm hydraulic system, including：Main pump 1, main valve 10, boom cylinder and logical valve 2；
Main pump 1 is connect with the oil inlet of main valve 10, and logical valve 2 is set on the oil circuit between 10 oil inlet of main pump 1 and main valve；Main valve 10
The first actuator port be connected with the rodless cavity of boom cylinder (the big chamber of swing arm), the second actuator port and boom cylinder of main valve 10
Rod chamber (the small chamber of swing arm) be connected.Certainly, the oil return opening of main valve 10 is connected to oil return circuit 9.
In the present embodiment, logical valve 2 is also known as cone valve, and control mode can divide single guiding, multiple boot, flow control, electromagnetism
Control etc..As a kind of further technical solution, which further includes：Logic control instruction switching valve
4, logic control instruction switching valve 4 is connected with logical valve 2, for the aperture of control logic valve 2.Wherein, logic control instruction is cut
Change one end connection logic control oil circuit of valve 4, the other end connection draining road of logic control instruction switching valve 4.
In the present embodiment, it is preferred that the bypass hydraulic fluid port of main valve 10 is connected to bleed off circuit 8, the oil inlet connection of main valve 10
In swing arm working connection 7, logical valve 2 is set on swing arm working connection 7, and bleed off circuit 8 is all connected to main pump 1 with swing arm working connection 7
Oil outlet.
Under the premise of clearly above-mentioned excavator swing arm hydraulic system, the control method of this implementation includes the following steps：
When swing arm works independently, throttle command is not sent to logical valve 2, logical valve 2 is into maximum open state, main pump 1
Oil circuit be connected through logical valve 2, main valve 10 with boom cylinder.
Wherein, specifically, during swing arm single movement, swing arm main valve 10 receives the signal of swing arm guide's oil circuit, and spool is cut
Change place by 1 oil circuit of main pump and boom cylinder oil communication, passes through the rise and fall of the flexible realization swing arm of oil cylinder, swing arm
The speed speed of single movement can be controlled by the size of pilot signal.At this moment the logical valve 2 of swing arm does not receive to throttle and refer to
It enables, in maximum open
When swing arm and other executing agency's composite moves, throttle command is sent to logical valve 2, logical valve 2 passes through adjusting
The flow of main pump 1 is preferentially distributed to other executing agencies by opening to distribute according to need the flow of main pump 1.
Wherein, specifically, in the case of swing arm and other executing agency's composite moves, because hydraulic oil is in composite move
When can preferentially flow to and load small executing agency, so as to cause the problems such as composite move is uncoordinated, and speed is slow, at this moment logical valve 2
Receive instruction to working connection meter in, the flow of main pump 1 is preferentially distributed into other actions, the ratio of assignment of traffic can root
It is controlled according to the size of logical order, so as to fulfill flow demand assignment function.
When emptying phenomenon occur or to carry out the operation of branch vehicle, cancel throttle command, 1 flow normal supply swing arm of main pump.
In the present embodiment, according to the actual machine test data after implementation：
After the hydraulic system, swing arm declines, and dipper discharge rate has apparent quickening.Swing arm declines existing without being emptied
As.Handling and complete machine coordination is obviously improved.For example, the speed of swing arm and dipper has apparent quickening, new circuit
Swing arm is 375mm/s and 706mm/s with dipper speed, and old circuit only has 336mm/s and 641mm/s.Other performances are such as emptied
And handling subjective assessment is carried out mainly by terminal user's use feeling.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, those of ordinary skill in the art should
Understand：It can still modify to the technical solution recorded in foregoing embodiments either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacement, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (9)
1. a kind of excavator swing arm hydraulic system, which is characterized in that including：Main pump, main valve, boom cylinder and logical valve；It is described
Main pump is connect with the oil inlet of the main valve, and the logical valve is set to the oil circuit between the main pump and the main valve oil inlet
On；First actuator port of the main valve is connected with the rodless cavity of the boom cylinder, the second actuator port of the main valve with
The rod chamber of the boom cylinder is connected.
2. excavator swing arm hydraulic system according to claim 1, which is characterized in that further include：Logic control instruction is cut
Valve is changed, the logic control instruction switching valve is connected with the logical valve, for controlling the aperture of the logical valve.
3. excavator swing arm hydraulic system according to claim 1, which is characterized in that the bypass hydraulic fluid port connection of the main valve
In bleed off circuit, the oil inlet of the main valve is connected to swing arm working connection, and the logical valve is set on the swing arm working connection,
The bleed off circuit is all connected to the oil outlet of main pump with the swing arm working connection.
4. excavator swing arm hydraulic system according to claim 1, which is characterized in that the oil return opening of the main valve is connected to
Oil return circuit.
5. excavator swing arm hydraulic system according to claim 1, which is characterized in that the first actuator port of the main valve
Oil circuit is additionally provided with luffing jib maintaining valve between the rodless cavity of the boom cylinder.
6. excavator swing arm hydraulic system according to claim 5, which is characterized in that the luffing jib maintaining valve is connected with dynamic
Arm keeps valve to release switching valve.
7. excavator swing arm hydraulic system according to claim 1, which is characterized in that the boom cylinder includes the first oil
The rodless cavity of cylinder and the second oil cylinder, first oil cylinder and the second oil cylinder is connected by the first distribution pipeline, first oil cylinder
It is connected with the rod chamber of the second oil cylinder by the second distribution pipeline, the first actuator port of the main valve and first isocon
Road is connected, and the second actuator port of the main valve is connected with second distribution pipeline.
8. excavator swing arm hydraulic system according to claim 1, which is characterized in that the oil outlet of the main pump is also connected with
There is main overflow valve, the main overflow valve is on the oil circuit between logical valve and the oil outlet of main pump.
9. excavator swing arm hydraulic system according to claim 8, which is characterized in that the main overflow valve is connected with hydraulic pressure
Fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721551208.8U CN207597461U (en) | 2017-11-20 | 2017-11-20 | A kind of excavator swing arm hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721551208.8U CN207597461U (en) | 2017-11-20 | 2017-11-20 | A kind of excavator swing arm hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207597461U true CN207597461U (en) | 2018-07-10 |
Family
ID=62760261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721551208.8U Active CN207597461U (en) | 2017-11-20 | 2017-11-20 | A kind of excavator swing arm hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207597461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118732A (en) * | 2017-11-20 | 2018-06-05 | 三重机有限公司 | A kind of excavator swing arm hydraulic system and control method |
| CN113026858A (en) * | 2021-04-07 | 2021-06-25 | 雷沃工程机械集团有限公司 | Control system and control method for improving leveling performance of excavator |
-
2017
- 2017-11-20 CN CN201721551208.8U patent/CN207597461U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118732A (en) * | 2017-11-20 | 2018-06-05 | 三重机有限公司 | A kind of excavator swing arm hydraulic system and control method |
| CN108118732B (en) * | 2017-11-20 | 2024-02-02 | 三一重机有限公司 | Hydraulic arm of excavator System and control method |
| CN113026858A (en) * | 2021-04-07 | 2021-06-25 | 雷沃工程机械集团有限公司 | Control system and control method for improving leveling performance of excavator |
| CN113026858B (en) * | 2021-04-07 | 2022-04-12 | 雷沃工程机械集团有限公司 | Control system and control method for improving leveling performance of excavator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101775822B (en) | Excavator swing arm descending hydraulic control loop | |
| CN101680207B (en) | Hydraulic valve device | |
| CN103122648B (en) | Multi-way valve hydraulic control system, rectilinear walking control valve and excavator | |
| CN105156391A (en) | Composite variable pump and hydraulic control system using composite variable pump | |
| CN106545041B (en) | hydraulic control system and excavator | |
| CN207597461U (en) | A kind of excavator swing arm hydraulic system | |
| WO2012094991A1 (en) | Apparatus for improving excavating operation characteristic and grading work characteristic of excavator | |
| CN113882459B (en) | Excavator energy recovery system and excavator | |
| WO2024045445A1 (en) | Multi-way valve, hydraulic system and excavator | |
| CN108118732A (en) | A kind of excavator swing arm hydraulic system and control method | |
| CN103058085B (en) | System system and rotary drilling rig | |
| CN110359516A (en) | Descending movable arm of excavator hydraulic control system and excavator | |
| CN201679029U (en) | Hydraulically controlled loop on the boom descending of excavator | |
| CN204553377U (en) | Low energy consumption many actuators hydraulic system and excavator | |
| CN108104183B (en) | Bucket rod regenerating device of hydraulic excavator and hydraulic excavator | |
| CN104912137B (en) | excavator hydraulic system with energy feedback function | |
| WO2014000376A1 (en) | Excavator hydraulic system, excavator, and control method for excavator hydraulic system | |
| CN102628284A (en) | Oil circuit control device for excavators | |
| CN201050076Y (en) | Lead operation valve oil supplying system | |
| CN204898749U (en) | Excavator hydraulic system with energy repayment function | |
| CN202209447U (en) | Converging valve and crane hydraulic control system with converging valve | |
| CN205207311U (en) | Meso position burden flow valve, swing arm energy -saving control system and excavator | |
| CN212896585U (en) | Converging hydraulic system of excavator bucket | |
| CN205225910U (en) | Swing arm hydraulic circuit system | |
| CN210621812U (en) | Excavator swing arm descending hydraulic control system and excavator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |