CN209012162U - A kind of hydraulic control system - Google Patents
A kind of hydraulic control system Download PDFInfo
- Publication number
- CN209012162U CN209012162U CN201821689477.5U CN201821689477U CN209012162U CN 209012162 U CN209012162 U CN 209012162U CN 201821689477 U CN201821689477 U CN 201821689477U CN 209012162 U CN209012162 U CN 209012162U
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- Prior art keywords
- valve
- hydraulic
- pilot control
- control valve
- solenoid valve
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Abstract
The utility model discloses a kind of hydraulic control systems, including the first hydraulic pump, the second hydraulic pump, the first solenoid valve, second solenoid valve, the first pilot control valve, the second pilot control valve, third pilot control valve and the 4th pilot control valve, first solenoid valve is the solenoid valve of two-position three way, and the first solenoid valve includes the first oil inlet for connecting the first hydraulic pump delivery outlet, connects the first working hole of the first pilot control valve control mouth and connect the first oil return opening of fuel tank；Second solenoid valve is the solenoid valve of two-position three way, and second solenoid valve includes the second oil inlet for connecting the second hydraulic pump delivery outlet, connects the second working hole of third pilot control valve control mouth and connect the second oil return opening of fuel tank.The utility model is applied on excavator, low pressure double pump big flow may be implemented, high pressure list pumps small flow, the power of Self Matching engine, cost is not only reduced, the problem of pressure does not increase when engine suppresses vehicle phenomenon and high speed operation when also solving excavator idling work.
Description
Technical field
The utility model belongs to excavator technical field more particularly to a kind of hydraulic control system applied on excavator
System.
Background technique
Excavator is that dosage is maximum, purposes is most wide, is also most representational engineering machinery.Excavator conduct economy,
Efficient earthwork construction machinery is widely used to industry and changes with civil buildings, communications and transportation, hydraulic power engineering, farmland
It makes, in the mechanized constructions such as mine excavation and modern military engineering.
Based on the consideration of cost etc., excavator can consider that the power for choosing entire hydraulic system is unlimited when selecting engine
Close to the power of engine.In most cases, excavator hydraulic control system chooses inverted flux control system.Due to minus flow
The signal acquisition point of control system is in the main exit for excavating valve, and negative pressure signal can just occur when only main control valve is acted
Variation, so that the discharge capacity of pump be made to change, engine output changes.However, negative pressure signal becomes in suddenly operation
Change it is large and fast, this meeting so that pump displacement variation it is large and fast, but also engine output variation greatly, when the output of engine
When power is more than its adjustable extent, the common rail pressure difference of engine is big, so that engine supply adjustment speed is not caught up with, finally leads
Vehicle is suppressed in cause.
Utility model content
The purpose of this utility model is to provide a kind of hydraulic control system, cooperate small one and large one two hydraulic type pump for applying fuel oil,
Accomplish that both maximum stream flow can be reached in low-load pressure, can also work under very high pressure, it is idle to solve excavator
Not the problem of pressure does not increase when engine suppresses vehicle phenomenon and high speed operation when speed work.
To achieve the goals above, the technical solution that the utility model is taken are as follows:
A kind of hydraulic control system provided by the utility model, including the first hydraulic pump, the second hydraulic pump, the first electromagnetism
Valve, second solenoid valve, the first pilot control valve, the second pilot control valve, third pilot control valve and the 4th pilot control valve, institute
State the first solenoid valve be two-position three way solenoid valve, first solenoid valve include connect the first hydraulic pump delivery outlet first into
Hydraulic fluid port, the first working hole for connecting the first pilot control valve control mouth and the first oil return opening for connecting fuel tank, first electromagnetism
For valve in normal orientation, the first oil inlet and the connection of the first working hole, first solenoid valve is in switching position, the first work
Mouth is connected to the first oil return opening, and the control mouth of second pilot control valve is in parallel with the first oil inlet of first solenoid valve
Connect the delivery outlet of the first hydraulic pump；The second solenoid valve is the solenoid valve of two-position three way, and the second solenoid valve includes connecting
Connect the second oil inlet of the second hydraulic pump delivery outlet, the second working hole for connecting third pilot control valve control mouth and connection fuel tank
The second oil return opening, the second solenoid valve in normal orientation, the second oil inlet and the second working hole connection, it is described second electricity
In switching position, the second working hole is connected to magnet valve with the second oil return opening, the control mouth of the 4th pilot control valve with it is described
Second oil inlet of second solenoid valve is connected in parallel the delivery outlet of the second hydraulic pump；The hydraulic oil of first pilot control valve is defeated
Outlet is connect with the hydraulic oil input port of oil cylinder of small arm of digger simultaneously with the hydraulic oil output port of second pilot control valve,
The hydraulic oil output port of the hydraulic oil output port of the third pilot control valve and the 4th pilot control valve simultaneously and excavates
The hydraulic oil input port of machine big arm cylinder connects.When excavator works normally, the first solenoid valve and second solenoid valve are in often
State position, the big arm cylinder and oil cylinder of small arm of excavator supply by double pump, thus pressure when very good solution high speed operation
Not the problem of not increasing；When excavator suddenly operates, pressure becomes larger so that the power of the first hydraulic pump and the second hydraulic pump becomes larger, at this time
The first solenoid valve and second solenoid valve switching position are controlled, is stopped to the first pilot control valve and third pilot control valve fuel feeding,
It allows the big arm cylinder of excavator and oil cylinder of small arm to be changed into single pump by double pump supply at the beginning to supply, so that function is started to keep up with
Adjustment speed is supplied, to avoid the appearance for suppressing vehicle phenomenon well.
Further, first pilot control valve is three six logical hydraulic operated valves.
Further, second pilot control valve is three seven logical hydraulic operated valves.
Further, the third pilot control valve is the hydraulic operated valve of 3 position-5 way.
Further, the 4th pilot control valve is three six logical hydraulic operated valves.
The utility model uses technical solution as above, has the following beneficial effects:
The utility model is applied on excavator, and low pressure double pump big flow may be implemented, and high pressure list pumps small flow, Self Matching
The power of engine both can reach maximum stream flow in low-load pressure, and can also work, not only drop under very high pressure
The problem of low cost, pressure does not increase when engine suppresses vehicle phenomenon and high speed operation when also solving excavator idling work.
Detailed description of the invention
Fig. 1 is the present embodiment hydraulic schematic diagram.
Specific embodiment
To further illustrate each embodiment, the utility model is provided with attached drawing.These attached drawings are in the utility model discloses
A part of appearance mainly to illustrate embodiment, and can cooperate the associated description of specification former come the running for explaining embodiment
Reason.Cooperation refers to these contents, and those of ordinary skill in the art will be understood that other possible embodiments and sheet are practical new
The advantages of type.Component in figure is not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Now in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The utility model is shown for being applied to excavator below, but those skilled in the art can be according to reality
Application carries out implementation and appropriate adjustment to the utility model, is not construed as limitations of the present invention.
As shown in Figure 1, a kind of hydraulic control system provided in this embodiment, including the first hydraulic pump (it is signal in figure, it can
Obtained by the prior art, this will not be detailed here), the second hydraulic pump (in figure for signal, can be obtained by the prior art, herein
No longer be described in detail), the first solenoid valve 1, second solenoid valve 2, the first pilot control valve 3, the second pilot control valve 4, third guide control
Valve 5 and the 4th pilot control valve 6 processed, first solenoid valve 1 are the solenoid valve of two-position three way, and first solenoid valve 1 includes
Connect the first hydraulic pump delivery outlet 7 the first oil inlet P 1, connect 3 control mouth of the first pilot control valve the first working hole A1 and
The first oil return inlet T 1 of fuel tank is connected, first solenoid valve 1 is in normal orientation, the first oil inlet P 1 and the first working hole A1
Connection, first solenoid valve 1 is in switching position, the first working hole A1 and the first oil return opening P1 connection, second guide
The control mouth of control valve 4 and the first oil inlet P 1 of first solenoid valve 1 are connected in parallel the delivery outlet 7 of the first hydraulic pump；Institute
The solenoid valve that second solenoid valve 2 is two-position three way is stated, the second solenoid valve 2 includes the of the second hydraulic pump delivery outlet 8 of connection
Two oil inlet Ps 2, the second working hole A2 for connecting 5 control mouth of third pilot control valve and the second oil return inlet T 2 for connecting fuel tank, institute
Second solenoid valve 2 is stated in normal orientation, the second oil inlet P 2 is connected to the second working hole A2, and the second solenoid valve 2 is being cut
When change place, the second working hole A2 is connected to the second oil return inlet T 2, the control mouth and described second of the 4th pilot control valve 6
Second oil inlet P 2 of solenoid valve 2 is connected in parallel the delivery outlet 8 of the second hydraulic pump；The hydraulic oil of first pilot control valve 3
The hydraulic oil output port of delivery outlet and second pilot control valve 4 connects with the hydraulic oil input port of oil cylinder of small arm of digger simultaneously
Connect, the hydraulic oil output port of the hydraulic oil output port of the third pilot control valve 5 and the 4th pilot control valve 6 simultaneously and
The hydraulic oil input port of oil cylinder of big arm of digger connects.
In the present embodiment, when excavator works normally, the first solenoid valve 1 and second solenoid valve 2 are in normal orientation, dig
The big arm cylinder and oil cylinder of small arm of pick machine supply by double pump, thus asking of not increasing of pressure when very good solution high speed operation
Topic；When excavator suddenly operates, pressure becomes larger so that the power of the first hydraulic pump and the second hydraulic pump becomes larger, and control first is electric at this time
2 switching position of magnet valve 1 and second solenoid valve, stops to 5 fuel feeding of the first pilot control valve 3 and third pilot control valve, allows excavation
The big arm cylinder and oil cylinder of small arm of machine are changed into single pump supply by double pump supply at the beginning, adjust so that function is started to keep up with supply
Speed is saved, to avoid the appearance for suppressing vehicle phenomenon well.
In the present embodiment, first pilot control valve 3 is three six logical hydraulic operated valves, can be obtained by the prior art,
This will not be detailed here.
In the present embodiment, second pilot control valve 4 is three seven logical hydraulic operated valves, can be obtained by the prior art,
This will not be detailed here.
In the present embodiment, the third pilot control valve 5 is the hydraulic operated valve of 3 position-5 way, can be obtained by the prior art,
This will not be detailed here.
In the present embodiment, the 4th pilot control valve 6 is three six logical hydraulic operated valves, can be obtained by the prior art,
This will not be detailed here.
Considered based on cost etc., the present embodiment can also carry out following change:
1., by pump power control valve current regulation to maximum, pump power is minimum when handle is remained neutral；To reduce mutation
When changed power range；
2. coordinating engine output and pump power variation, when engine output increases, Fuzzy tuning pump power
Control valve electric current becomes smaller, and pump power output becomes larger, to meet user job requirement；
3. it is minimum to need flow when pilot pressure maximum, therefore in pilot pressure maximum, switching double pump fuel feeding change
For single oil pump feed.
The utility model is applied on excavator, and low pressure double pump big flow may be implemented, and high pressure list pumps small flow, Self Matching
The power of engine both can reach maximum stream flow in low-load pressure, and can also work, not only drop under very high pressure
The problem of low cost, pressure does not increase when engine suppresses vehicle phenomenon and high speed operation when also solving excavator idling work.
Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered
This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details
On the utility model can be made a variety of changes, be the protection scope of the utility model.
Claims (5)
1. a kind of hydraulic control system, it is characterised in that: including the first hydraulic pump, the second hydraulic pump, the first solenoid valve, the second electricity
Magnet valve, the first pilot control valve, the second pilot control valve, third pilot control valve and the 4th pilot control valve, first electricity
Magnet valve is the solenoid valve of two-position three way, and first solenoid valve includes the first oil inlet for connecting the first hydraulic pump delivery outlet, connects
The first working hole of the first pilot control valve control mouth and the first oil return opening of connection fuel tank are connect, first solenoid valve is in normality
When position, the first oil inlet and the connection of the first working hole, first solenoid valve is in switching position, the first working hole and first
First oil inlet of oil return opening connection, the control mouth of second pilot control valve and first solenoid valve is connected in parallel first
The delivery outlet of hydraulic pump；The second solenoid valve is the solenoid valve of two-position three way, and the second solenoid valve includes the second liquid of connection
Second oil inlet of press pump delivery outlet, the second working hole for connecting third pilot control valve control mouth and second time that connects fuel tank
Hydraulic fluid port, the second solenoid valve in normal orientation, cutting by the second oil inlet and the connection of the second working hole, the second solenoid valve
When change place, the second working hole is connected to the second oil return opening, the control mouth of the 4th pilot control valve and second electromagnetism
Second oil inlet of valve is connected in parallel the delivery outlet of the second hydraulic pump；The hydraulic oil output port of first pilot control valve and institute
It states the hydraulic oil output port of the second pilot control valve while being connected with the hydraulic oil input port of oil cylinder of small arm of digger, the third
The hydraulic oil output port of the hydraulic oil output port of pilot control valve and the 4th pilot control valve is oily with big arm of digger simultaneously
The hydraulic oil input port of cylinder connects.
2. hydraulic control system according to claim 1, it is characterised in that: first pilot control valve is three six logical
Hydraulic operated valve.
3. hydraulic control system according to claim 1, it is characterised in that: second pilot control valve is three seven logical
Hydraulic operated valve.
4. hydraulic control system according to claim 1, it is characterised in that: the third pilot control valve is 3 position-5 way
Hydraulic operated valve.
5. hydraulic control system according to claim 1, it is characterised in that: the 4th pilot control valve is three six logical
Hydraulic operated valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821689477.5U CN209012162U (en) | 2018-10-18 | 2018-10-18 | A kind of hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821689477.5U CN209012162U (en) | 2018-10-18 | 2018-10-18 | A kind of hydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209012162U true CN209012162U (en) | 2019-06-21 |
Family
ID=66839069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821689477.5U Expired - Fee Related CN209012162U (en) | 2018-10-18 | 2018-10-18 | A kind of hydraulic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209012162U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117450122A (en) * | 2023-12-25 | 2024-01-26 | 中联重科土方机械有限公司 | Hydraulic system, control method and rescue equipment |
-
2018
- 2018-10-18 CN CN201821689477.5U patent/CN209012162U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117450122A (en) * | 2023-12-25 | 2024-01-26 | 中联重科土方机械有限公司 | Hydraulic system, control method and rescue equipment |
| CN117450122B (en) * | 2023-12-25 | 2024-03-19 | 中联重科土方机械有限公司 | Hydraulic system, control method and rescue equipment |
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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: 20190621 Termination date: 20211018 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |