CN207122453U - A kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support - Google Patents
A kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support Download PDFInfo
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- CN207122453U CN207122453U CN201720747808.5U CN201720747808U CN207122453U CN 207122453 U CN207122453 U CN 207122453U CN 201720747808 U CN201720747808 U CN 201720747808U CN 207122453 U CN207122453 U CN 207122453U
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- valve
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- oil cylinder
- switching valve
- telescopic oil
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Abstract
The utility model discloses a kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support,Including oil sources,Fuel tank,Reversal valve,Balanced valve,Telescopic oil cylinder,Controller,Flow speed control valve,Switching valve,Pressure switch and check valve,Oil sources is connected with reversal valve,Fuel tank is connected with reversal valve,The A mouths of reversal valve export three oil pipes,First oil pipe and the A mouths of switching valve connect,Second oil pipe and the B mouths of switching valve connect,3rd oil pipe is connected with balanced valve,The C mouths of switching valve are connected with balanced valve,The rodless cavity of balanced valve and telescopic oil cylinder connects,The B mouths of reversal valve and the rod chamber of telescopic oil cylinder connect,The control mouth of balanced valve and the rod chamber of telescopic oil cylinder connect,Pressure switch is located on the rod chamber connection oil circuit of telescopic oil cylinder,Connected between pressure switch and controller by wire,Controller is connected with the electromagnet of reversal valve and switching valve by wire,Effectively avoid jitter phenomenon occur in arm support removal process,Improve its operation comfort.
Description
Technical field
The utility model belongs to hydraulic drive and control technical field, specifically, the utility model is related to one kind and is used for
Mitigate the electrohydraulic control system of engineering machinery arm support shake.
Background technology
Arm support engineering machinery refers to the total of the engineering machinery that task is completed by the use of arm support as main working parts
Claim.Arm support engineering machinery is mainly characterized by, and the weight of load or equipment, and stretching by arm support are born by arm support
The function of specifying is completed in the actions such as contracting, swing.Typical arm support engineering machinery have concrete mixer, crane, fire fighting truck and
High-altitude operation vehicle etc..
In different engineering machinery, the operation principle of arm support is similar.By taking crane as an example, in order to increase the work of crane
Industry amplitude and height, the crane arm of existing crane is mostly multistage telescopic arm, and drives more piece by rope using single oil cylinder
Crane arm stretches.
As shown in figure 1, the figure is the hydraulic system principle figure of boom frame telescopic system common in the art.
The hydraulic system principle figure of the boom frame telescopic system controls the rodless cavity of telescopic oil cylinder 5 by reversal valve 3 and has bar
Relation between chamber and system oil sources 1 and oil return circuit, to control the stretching of telescopic oil cylinder 5 or retraction；Reversal valve 3 is with stretching
The oil circuit of the rodless cavity connection of oil cylinder 5 is provided with balanced valve 4, to form certain back pressure when telescopic oil cylinder 5 is retracted, it is ensured that peace
Full operation.When 3 left access systems of reversal valve, the fluid in oil sources 1 is through reversal valve 3 and balanced valve 4, into telescopic oil cylinder 5
Rodless cavity, the rod chamber fluid of telescopic oil cylinder 5 passes through the oil return box 2 of reversal valve 3, and now arm support stretches out；When 3 right position of reversal valve connects
When entering system, the fluid in oil sources 1 enters the rod chamber of telescopic oil cylinder 5 through reversal valve 3, while fluid enters the control of balanced valve 4
Donsole so that the right position access system of balanced valve 4, the rodless cavity fluid of telescopic oil cylinder 5 is through balanced valve 4 and the oil return box of reversal valve 3
2.Now arm support is retracted.
In the program, the control mouth of balanced valve 4 and the rod chamber oil communication of telescopic oil cylinder 5, the rodless cavity of telescopic oil cylinder 5
Pressure influence the openings of sizes of balanced valve 4 and the fluid flow passed through again, and the rod chamber of telescopic oil cylinder 5 and telescopic oil cylinder 5
Rodless cavity oil liquid pressure between the equilibrium relation of power be present.Obviously, in arm support retraction process, it is enough gram when pressure rises to
When taking back pressure in the pre-pressure of the spring of balanced valve 4 and the rodless cavity of telescopic oil cylinder 5, balanced valve 4 is opened, telescopic oil cylinder 5 without bar
The fluid of chamber flows out through balanced valve 4, and certain decline necessarily occurs in the pressure of the rodless cavity of telescopic oil cylinder 5.However, hydraulic system
Pressure depends on load, and the decline of the rodless cavity pressure of telescopic oil cylinder 5 causes the decline of the rod chamber pressure of telescopic oil cylinder 5, stretched
The decline of the rod chamber pressure of contracting oil cylinder 5 causes the opening of balanced valve 4 to diminish, and the opening of balanced valve 4 diminishes and makes the nothing of telescopic oil cylinder 5
The flow of rod cavity outflow reduces, and the fluid of the rodless cavity outflow of telescopic oil cylinder 5, which reduces, to be caused in the rodless cavity pressure of telescopic oil cylinder 5
Rise, the rodless cavity pressure of telescopic oil cylinder 5, which rises, means that load becomes big, and therefore the rod chamber pressure of telescopic oil cylinder 5 rises, so anti-
It is multiple, the fluctuation that hydraulic system pressure is violent is caused, along with loading the factors of instability caused by the mechanical structure of arm support, so as to
Cause the shake of arm support, it is clear that the jitter phenomenon while operation comfort is influenceed, while can be to equipment normal operation band
Carry out certain danger.
Utility model content
The utility model provides a kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support, effectively avoids arm support
Occur jitter phenomenon in removal process, on the basis of job safety is ensured, improve its operation comfort.
To achieve these goals, the technical scheme that the utility model is taken is：One kind is used to mitigate engineering machinery arm support
The electrohydraulic control system of shake, including oil sources, fuel tank, reversal valve, balanced valve, telescopic oil cylinder, controller, flow speed control valve, switching valve,
Pressure switch and check valve, connected by oil pipe between the P mouths of the oil sources and reversal valve, the T of the fuel tank and reversal valve
Being connected between mouthful by oil pipe, A mouths three oil pipes of output of the reversal valve, the A mouths of first oil pipe and switching valve connect, and
Flow speed control valve, the B mouths connection of second oil pipe and switching valve are being which is provided with, the 3rd oil pipe is connected with balanced valve, and thereon
Provided with check valve, the C mouths of the switching valve are connected with balanced valve, the rodless cavity connection of the balanced valve and telescopic oil cylinder, described
The oil pipe of B mouths output and the rod chamber of telescopic oil cylinder of reversal valve connect, the control mouth of the balanced valve and having for telescopic oil cylinder
Rod cavity is connected, and the rod chamber operating pressure signal of the pressure switch monitoring telescopic oil cylinder, the pressure switch is arranged on
On the rod chamber connection oil circuit of telescopic oil cylinder, connected between the pressure switch and controller by wire, the controller
It is connected with the electromagnet of reversal valve and switching valve by wire.
Preferably, the reversal valve is three-position four-way electromagnetic directional valve.
Preferably, the switching valve is 3-position-3-way solenoid directional control valve, when the electromagnet on switching valve both sides all must not be electric,
The middle position access oil circuit of switching valve, when the electromagnet on the right of switching valve obtains electric, A mouths connect with C mouths, when the electricity on the switching valve left side
When magnet obtains electric, B mouths connect with C mouths.
Preferably, the telescopic oil cylinder may be selected to be single-piston-rod hydraulic cylinder or telescopic hydraulic cylinder.
Preferably, the Median Function of the three-position four-way electromagnetic directional valve is Y types.
Beneficial effect using above technical scheme is：This is used for the electrichydraulic control system for mitigating the shake of engineering machinery arm support
System, the fluctuation of the control mouth of balanced valve or the operating pressure of the rod chamber of telescopic oil cylinder, control are detected by pressure switch
The signal that the device real-time reception pressure switch is sent, and the break-make of switching valve is controlled by controller, disappeared using flow speed control valve
Subtract the energy of system pressure impact, while the rod chamber pressure of telescopic oil cylinder is stablized as early as possible, so as to alleviate telescopic oil cylinder and
The shake of arm support.
The Median Function of the three-position four-way electromagnetic directional valve is Y types, oil sources not off-load, and telescopic oil cylinder floats.
Because this programme is by the controller judgement to operating mode in real time, and the work of automatic output control Signal Regulation oil circuit
State, drawback caused by the delay of human intervention can be avoided, effectively increase the effect for mitigating shake.
Brief description of the drawings
Fig. 1 is the hydraulic system principle figure of boom frame telescopic system common in the art；
Fig. 2 is hydraulic schematic diagram of the present utility model；
Wherein：
1st, oil sources；2nd, mailbox；3rd, reversal valve；4th, balanced valve；5th, telescopic oil cylinder；6th, controller；7th, flow speed control valve；8th, switch
Valve；9th, pressure switch；10th, check valve.
Embodiment
Below against accompanying drawing, by the description to embodiment, specific embodiment of the present utility model is made further detailed
Thin explanation, it is therefore an objective to help those skilled in the art have to design of the present utility model, technical scheme it is more complete, accurate and
Deep understanding, and contribute to its implementation.
As shown in Figure 1 to Figure 2, the utility model is a kind of electrichydraulic control system for being used to mitigate the shake of engineering machinery arm support
System, effectively avoids jitter phenomenon occur in arm support removal process, and on the basis of job safety is ensured, it is comfortable to improve its operation
Property.
Specifically, as shown in Figure 1 to Figure 2, including oil sources 1, fuel tank 2, reversal valve 3, balanced valve 4, telescopic oil cylinder 5, control
Device 6, flow speed control valve 7, switching valve 8, pressure switch 9 and check valve 10 processed, as shown in Fig. 2 the P mouths of the oil sources 1 and reversal valve 3
Between connected by oil pipe, connected between the T mouths of the fuel tank 2 and reversal valve 3 by oil pipe, the output of the A mouths of the reversal valve 3
Three oil pipes, first oil pipe are connected with the A mouths of switching valve 3, and which is provided with flow speed control valve 7, second oil pipe and switching valve 8
The connection of B mouths, the 3rd oil pipe be connected with balanced valve 4, and which is provided with check valve 10, and the C mouths of the switching valve 8 are with balancing
Valve 4 is connected, and the balanced valve 4 is connected with the rodless cavity of telescopic oil cylinder 5, oil pipe and the flexible oil of the B mouths output of the reversal valve 3
The rod chamber connection of cylinder 5, the control mouth of the balanced valve 4 are connected with the rod chamber of telescopic oil cylinder 5, and the pressure switch 9 is supervised
The rod chamber operating pressure signal of telescopic oil cylinder 5 is surveyed, the pressure switch 9 is arranged on the rod chamber connection oil of telescopic oil cylinder 5
Lu Shang, connected between the pressure switch 9 and controller 6 by wire, the controller 6 and reversal valve 3 and switching valve 8
Electromagnet is connected by wire.
As shown in Fig. 2 the reversal valve 3 is three-position four-way electromagnetic directional valve.
As shown in Fig. 2 the switching valve 8 is 3-position-3-way solenoid directional control valve, when the both sides of switching valve 8 electromagnet Y2a and
When Y2b must not be electric, the middle position access oil circuit of switching valve 8, when the electromagnet Y2a on the right of switching valve 8 obtains electric, A mouths connect with C mouths
Logical, when the electromagnet Y2b on the left side of switching valve 8 obtains electric, B mouths connect with C mouths.
Specific works mode is illustrated with specific embodiment below：
This is used for the electrohydraulic control system for mitigating the shake of engineering machinery arm support, in the course of work, when telescopic oil cylinder 5 needs to stretch
When going out, controller 6 sends control signal, and to obtain the electromagnet Y1b of reversal valve 3 electric, and the electromagnet Y2a and Y2b of switching valve 8 are not
When obtaining electric, now the left position access system of reversal valve 3, the middle position of switching valve 8 access oil circuit, and the pressure oil liquid of oil sources 1 is through commutation
The left position of valve 3, check valve 10, the rodless cavity of the entrance telescopic oil cylinder 5 of balanced valve 4, the fluid of the rod chamber of telescopic oil cylinder 5 is through commutation
Valve 3 flows back to fuel tank 2.When telescopic oil cylinder 5 needs to retract, controller 6, which sends control signal, obtains the electromagnet Y1a of reversal valve 3
Electricity, the right position access system of reversal valve 3, the pressure oil liquid of oil sources 1 enter the rod chamber of telescopic oil cylinder 5 through reversal valve 3, made simultaneously
For the control mouth of balanced valve 4, the right position access system of balanced valve 4, the fluid of the rodless cavity of telescopic oil cylinder 5 by balanced valve 4 the right side
Bit stream returns.Under this operating mode, the utility model can select two branch roads between switching valve 8 and reversal valve 3 according to fluctuation of load situation
One of conducting.Specifically, when the pressure oscillation in the rod chamber of telescopic oil cylinder 5 is larger, then trigger pressure switch 9 and incite somebody to action
This signal delivers to controller 6, and it is electric that controller 6 obtains the electromagnet Y2a of switching valve 8 through sending control signal, is allowed to right position access
System works, and the now oil return of the rodless cavity of telescopic oil cylinder 5 flows back to fuel tank 2 through balanced valve 4, switching valve 8, flow speed control valve 7, reversal valve 3；
That is, limiting the flow of telescopic oil cylinder 5 using flow speed control valve 7, the pressure of rodless cavity when telescopic oil cylinder 5 bounces back is also increased
Power, portion of energy is absorbed, thus the pressure oscillation of the rod chamber of telescopic oil cylinder 5 can be made to disappear as early as possible, and then can effectively mitigated
The shake that telescopic oil cylinder 5 and its arm support driven occur in removal process.Shadow is not enough to when arm withdraws load pressure fluctuation
During acoustic system stability, then pressure switch 9 will not be triggered, controller 6 sends signal, and to obtain the electromagnet Y2b of switching valve 8 electric,
Left position access system work is allowed to, the now oil return of the rodless cavity of telescopic oil cylinder 5 flows back to oil through balanced valve 4, switching valve 8, reversal valve 3
Case 2, because middle without flow speed control valve 8, therefore resistance is small, it can be ensured that the operating efficiency of retraction operation.
The ripple of the control mouth of balanced valve 4 or the operating pressure of the rod chamber of telescopic oil cylinder 5 is detected by pressure switch 9
Move, the signal that the real-time reception of controller 6 pressure switch 9 is sent, and the break-make of switching valve 8 is controlled by controller 6, profit
With the energy of the abatement system compression shock of flow speed control valve 7, while the rod chamber pressure of telescopic oil cylinder 5 is set to stablize as early as possible, so as to mitigate
The shake of telescopic oil cylinder 5 and arm support.
The Median Function of the three-position four-way electromagnetic directional valve is Y types, the not off-load of oil sources 1, and telescopic oil cylinder 5 floats.
Because this programme is by the judgement to operating mode in real time of controller 6, and the work of automatic output control Signal Regulation oil circuit
Make state, drawback caused by the delay of human intervention can be avoided, effectively increase the effect for mitigating shake.
The utility model is exemplarily described above in association with accompanying drawing, it is clear that the utility model implements not
Limited by aforesaid way, as long as employ the various unsubstantialities that methodology and technical scheme of the present utility model are carried out
Improvement；Or it is not improved, above-mentioned design of the present utility model and technical scheme are directly applied into other occasions, at this
Within the protection domain of utility model.
Claims (5)
- A kind of 1. electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support, it is characterised in that：Including oil sources, fuel tank, change To valve, balanced valve, telescopic oil cylinder, controller, flow speed control valve, switching valve, pressure switch and check valve, the oil sources and reversal valve P mouths between connected by oil pipe, connected between the T mouths of the fuel tank and reversal valve by oil pipe, the A mouths of the reversal valve are defeated Go out three oil pipes, the A mouths connection of first oil pipe and switching valve, and which is provided with flow speed control valve, second oil pipe and switching valve The connection of B mouths, the 3rd oil pipe be connected with balanced valve, and which is provided with check valve, C mouths and the balanced valve company of the switching valve Connect, the connection of the rodless cavity of the balanced valve and telescopic oil cylinder, the oil pipe of the B mouths output of the reversal valve and telescopic oil cylinder have bar Chamber connects, and the control mouth of the balanced valve and the rod chamber of telescopic oil cylinder connect, the pressure switch monitoring telescopic oil cylinder Rod chamber operating pressure signal, the pressure switch be arranged on telescopic oil cylinder rod chamber connection oil circuit on, the pressure after Connected between Electrical Appliances ＆ Control device by wire, the controller is connected with the electromagnet of reversal valve and switching valve by wire.
- 2. a kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support according to claim 1, its feature exist In：The reversal valve is three-position four-way electromagnetic directional valve.
- 3. a kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support according to claim 1, its feature exist In：The switching valve is 3-position-3-way solenoid directional control valve, when the electromagnet on switching valve both sides all must not be electric, the middle position of switching valve Oil circuit is accessed, when the electromagnet on the right of switching valve obtains electric, A mouths connect with C mouths, when the electromagnet on the switching valve left side obtains electric, B Mouth connects with C mouths.
- 4. a kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support according to claim 1, its feature exist In：The telescopic oil cylinder may be selected to be single-piston-rod hydraulic cylinder or telescopic hydraulic cylinder.
- 5. a kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support according to claim 2, its feature exist In：The Median Function of the three-position four-way electromagnetic directional valve is Y types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720747808.5U CN207122453U (en) | 2017-06-26 | 2017-06-26 | A kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720747808.5U CN207122453U (en) | 2017-06-26 | 2017-06-26 | A kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support |
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| Publication Number | Publication Date |
|---|---|
| CN207122453U true CN207122453U (en) | 2018-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720747808.5U Expired - Fee Related CN207122453U (en) | 2017-06-26 | 2017-06-26 | A kind of electrohydraulic control system for being used to mitigate the shake of engineering machinery arm support |
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| Country | Link |
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| CN (1) | CN207122453U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005664A (en) * | 2019-04-18 | 2019-07-12 | 江苏南方润滑股份有限公司 | A kind of bidirectional speed governing hydraulic control system based on hydraulic cylinder load oil back chamber |
| CN110919692A (en) * | 2019-12-12 | 2020-03-27 | 扬州大学 | Mechanical arm and intelligent control technology |
| CN111704034A (en) * | 2020-05-15 | 2020-09-25 | 河北雷萨重型工程机械有限责任公司 | Crane and telescopic oil cylinder control method |
-
2017
- 2017-06-26 CN CN201720747808.5U patent/CN207122453U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005664A (en) * | 2019-04-18 | 2019-07-12 | 江苏南方润滑股份有限公司 | A kind of bidirectional speed governing hydraulic control system based on hydraulic cylinder load oil back chamber |
| CN110005664B (en) * | 2019-04-18 | 2024-06-11 | 江苏南方润滑股份有限公司 | Bidirectional speed regulation hydraulic control system based on negative load oil return cavity of hydraulic cylinder |
| CN110919692A (en) * | 2019-12-12 | 2020-03-27 | 扬州大学 | Mechanical arm and intelligent control technology |
| CN110919692B (en) * | 2019-12-12 | 2022-06-14 | 扬州大学 | Mechanical arm and intelligent control technology |
| CN111704034A (en) * | 2020-05-15 | 2020-09-25 | 河北雷萨重型工程机械有限责任公司 | Crane and telescopic oil cylinder control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180320 Termination date: 20190626 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |