CN209146011U - A kind of excavator single argument pump hydraulic system - Google Patents
A kind of excavator single argument pump hydraulic system Download PDFInfo
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- CN209146011U CN209146011U CN201821584240.0U CN201821584240U CN209146011U CN 209146011 U CN209146011 U CN 209146011U CN 201821584240 U CN201821584240 U CN 201821584240U CN 209146011 U CN209146011 U CN 209146011U
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Abstract
The utility model provides a kind of excavator single argument pump hydraulic system, including hydraulic oil container, is arranged in the hydraulic oil container and load sensing multi-way valve and preferential valve group that the variable pump with load signal hydraulic fluid port, oil inlet are connect with the oil outlet of the variable pump respectively and the steering booster with feedback hydraulic fluid port.By the way that limited valve group is arranged, it also can be realized corresponding function in the case where not configuring each pilot oil source of the steering pump in conventional excavators hydraulic system and pumping, be effectively simplified pipeline structure, advantage of lower cost；Simultaneously because the presence of the variable pump, load sensing multi-way valve with load signal hydraulic fluid port and the steering booster with feedback hydraulic fluid port, hydraulic oil needed for pilot valve in steering booster and hydraulic system is obtained by variable pump on demand, spare without overflow, energy loss is relatively small.
Description
Technical field
The utility model relates to a kind of hydraulic system, especially a kind of excavator single argument pump hydraulic system.
Background technique
Excavator is a kind of common engineering machinery, and application range is very extensive.In order to meet excavator walking work
Required power demand, existing excavator hydraulic system would generally cooperate multiple oil pumps, such as main oil pump, steering pump and elder generation
The hydraulic system pipeline structure of Oil Guide source pump etc., this heavy wool pump is complex, and the cost is relatively high, and section hydraulic oil needs
Want overflow spare, energy loss is relatively large.
In view of this, the applicant carries out in-depth study to the structure of excavator hydraulic system, there is this case generation then.
Utility model content
The purpose of this utility model is to provide a kind of advantage of lower cost and the relatively small excavator lists of energy loss
Variable pump hydraulic system.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of excavator single argument pump hydraulic system, including hydraulic oil container, setting in the hydraulic oil container and have negative
The load sensing multi-way valve and pressure-gradient control valve that variable pump, the oil inlet of information carrying hydraulic fluid port are connect with the oil outlet of the variable pump respectively
Group and steering booster with feedback hydraulic fluid port, the preferential valve group turn to oil-feed port and the steering booster into
Hydraulic fluid port connection, the feedback hydraulic fluid port of the steering booster is connect with the load signal oil outlet of the variable pump and the connection of the two
The first check valve is provided on pipeline, the feedback hydraulic fluid port of the load sensing multi-way valve is connected to the variable pump and described first
In connecting pipe between check valve, the oil return of the load sensing multi-way valve, the preferential valve group and the steering booster
Mouth is connect with the hydraulic oil container respectively.
As a kind of improvement of the utility model, the feedback hydraulic fluid port of the load sensing multi-way valve is connected by three-way connection
In connecting pipe between the variable pump and first check valve.
As a kind of improvement of the utility model, preferential valve group includes that fuel feed hole connects with the oil outlet of the variable pump respectively
The oil outlet of the first pressure-gradient control valve and the second pressure-gradient control valve connect, first pressure-gradient control valve is the steering oil-feed port, and described second is excellent
The pilot valve of the oil outlet of first valve and excavator connects, the oil return opening of first pressure-gradient control valve and second pressure-gradient control valve respectively with
The hydraulic oil container connection.
Connecting pipe as a kind of improvement of the utility model, between second pressure-gradient control valve and the pilot valve of excavator
On be provided with second one-way valve.
As a kind of improvement of the utility model, the preferential valve group further includes overflow valve, the oil inlet of the overflow valve
Be connected in the connecting pipe between second pressure-gradient control valve and the second one-way valve, the oil return opening of the overflow valve with it is described
Hydraulic oil container connection.
By adopting the above technical scheme, the utility model has the following beneficial effects:
1, by the way that limited valve group is arranged, each pilot oil source pump of the steering pump in conventional excavators hydraulic system is not being configured
In the case of also can be realized corresponding function, be effectively simplified pipeline structure, advantage of lower cost；Simultaneously because having load letter
The presence of the variable pump, load sensing multi-way valve and the steering booster with feedback hydraulic fluid port of number hydraulic fluid port, so that steering booster
And hydraulic oil needed for the pilot valve in hydraulic system can be obtained by variable pump on demand, energy consumption spare without overflow
It loses relatively small.
2, using the steering booster fed back with Ls, after facilitating steering booster work, the pressure of feedback hydraulic oil
Power can allow variable pumpage to become larger, to realize that steered linear operates.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model excavator single argument hydraulic system.
Corresponding mark is as follows in figure:
10- hydraulic oil container；20- variable pump；
30- load sensing multi-way valve；The preferential valve group of 40-；
The first pressure-gradient control valve of 41-；The second pressure-gradient control valve of 42-；
43- overflow valve；44 second one-way valves；
50- steering booster；The first check valve of 51-.
Specific embodiment
The utility model is described further with body embodiment with reference to the accompanying drawing.
As shown in Figure 1, excavator single argument pump hydraulic system provided in this embodiment is in existing excavator hydraulic pressure system
The improvement carried out on the basis of system, specifically, the excavator single argument hydraulic system includes hydraulic oil container 10, is arranged hydraulic
The load that fuel tank 10 variable pump 20, oil inlet interior and with load signal hydraulic fluid port are connect with the oil outlet of variable pump 20 respectively is quick
Feel multi-way valve 30 and preferential valve group 40 and the steering booster 50 with feedback hydraulic fluid port, it is above-mentioned with load signal hydraulic fluid port
Variable pump 20 is also referred to as load-reacting pump, with load sensing multi-way valve 30 and with the steering booster for feeding back hydraulic fluid port
50 can directly buy acquisition from the market.
The first pressure-gradient control valve 41 and second that preferential valve group 40 is connect with the oil outlet of variable pump 20 respectively including fuel feed hole is excellent
First valve 42, wherein the first pressure-gradient control valve 41 and the second pressure-gradient control valve 42 collectively form the oil inlet P of preferential valve group 40, the first pressure-gradient control valve
41 oil outlet constitutes the steering oil-feed port Pz of preferential valve group 40, and the pilot valve of the oil outlet of the second pressure-gradient control valve 42 and excavator
Connection, certainly, the pilot valve of excavator also belongs to a part of the present embodiment excavator single argument pump hydraulic system, due to its knot
Structure and link circuit are all identical as existing excavator hydraulic system, not the emphasis of the present embodiment, and and will not be described here in detail.The
The oil return opening of one pressure-gradient control valve 41 and the second pressure-gradient control valve 42 is connect with hydraulic oil container 10 respectively, i.e., the first pressure-gradient control valve 41 and second is preferential
The oil return opening of valve 42 is all the oil return opening of preferential valve group 40, namely the oil return opening of preferential valve group 40 is connect with hydraulic oil container 10.
Preferably, in the present embodiment, preferential valve group 40 further includes overflow valve 43, and the second pressure-gradient control valve 42 and excavator
Second one-way valve 44 is provided in connecting pipe between pilot valve, the oil inlet of overflow valve 43 is connected to by three-way connection
In connecting pipe between two pressure-gradient control valves 42 and second one-way valve 44, the oil return opening of overflow valve 43 is connect with hydraulic oil container 10, i.e.,
The oil return opening of overflow valve 43 is also the oil return opening of preferential valve group 40, and the hydraulic oil that can use overflow in this way controls the first pressure-gradient control valve
41 and second pressure-gradient control valve 42 flow, and then the oil pressure for the hydraulic oil that the second pressure-gradient control valve 42 is supplied to pilot valve is limited in one
In preset safety value, safety is relatively high.
The steering oil-feed port Pz of preferential valve group 40 is connect with the oil inlet P of steering booster 50, steering booster 50 it is anti-
Feedback hydraulic fluid port LS connect with the load signal oil outlet X of variable pump 20 and is provided in the connecting pipe of the two the first check valve 51,
The feedback hydraulic fluid port LS of load sensing multi-way valve 30 is connected in the connecting pipe between variable pump 20 and the first check valve 51, preferably
, the feedback hydraulic fluid port LS of load sensing multi-way valve 30 is connected between the 51 of variable pump 20 and the first check valve by three-way connection
In connecting pipe.In addition, the oil return inlet T of load sensing multi-way valve 30 and steering booster 50 is connect with hydraulic oil container 10 respectively.
In use, variable pump 20 provides pressure oil to load sensing multi-way valve 30 and preferential valve group 40, preferential valve group 40
There is a two-stage pressure-gradient control valve in the inside, and the first order gives steering booster 50 and provides pressure oil (by Pz hydraulic fluid port), pressure setting according to
Needed for steering booster 50；The second level gives pilot valve and provides pressure oil (exporting by Pv1, Pv2 hydraulic fluid port), and pressure setting is pressed
According to needed for pilot system.The oil inlet P that the oil pressure that oil-feed port Pz comes out enters steering booster 50 is turned to, when steering booster 50
When work, feedback hydraulic fluid port LS exports feedback oil pressure, and passes through three-way connection with the feedback hydraulic fluid port LS of load sensing multi-way valve 30
It links together, and is connect with the load signal oil outlet X of variable pump 20, so that the discharge capacity for controlling variable pump 20 realizes permanent function
Rate, while turning to oil-feed port Pz in order to prevent and generating oil return, therefore the connecting pipe in the feedback hydraulic fluid port LS to booster 50 increases
First check valve 51.
The utility model is described in detail above in conjunction with specific embodiment, but the embodiments of the present invention
It is not limited to the above embodiments, those skilled in the art can make various changes according to the prior art to the utility model
Shape, these are all within the protection scope of the present invention.
Claims (5)
1. a kind of excavator single argument pump hydraulic system, which is characterized in that including hydraulic oil container, be arranged in the hydraulic oil container
And the load sensing multi-way valve that variable pump, the oil inlet with load signal hydraulic fluid port are connect with the oil outlet of the variable pump respectively
With preferential valve group and the steering booster with feedback hydraulic fluid port, the steering oil-feed port of the preferential valve group are helped with the steering
The oil inlet of power device connects, and the feedback hydraulic fluid port of the steering booster is connect and two with the load signal oil outlet of the variable pump
Be provided with the first check valve in the connecting pipe of person, the feedback hydraulic fluid port of the load sensing multi-way valve be connected to the variable pump and
In connecting pipe between first check valve, the load sensing multi-way valve, the preferential valve group and the power steering
The oil return opening of device is connect with the hydraulic oil container respectively.
2. excavator single argument pump hydraulic system as described in claim 1, which is characterized in that the load sensing multi-way valve
Feedback hydraulic fluid port is connected in the connecting pipe between the variable pump and first check valve by three-way connection.
3. excavator single argument pump hydraulic system as claimed in claim 1 or 2, which is characterized in that preferential valve group includes oil inlet
The first pressure-gradient control valve and the second pressure-gradient control valve that hole is connect with the oil outlet of the variable pump respectively, the oil outlet of first pressure-gradient control valve
For the steering oil-feed port, the oil outlet of second pressure-gradient control valve and the pilot valve of excavator are connected, first pressure-gradient control valve and
The oil return opening of second pressure-gradient control valve is connect with the hydraulic oil container respectively.
4. excavator single argument pump hydraulic system as claimed in claim 3, which is characterized in that second pressure-gradient control valve and excavation
Second one-way valve is provided in connecting pipe between the pilot valve of machine.
5. excavator single argument pump hydraulic system as claimed in claim 4, which is characterized in that the preferential valve group further includes overflowing
Valve is flowed, the oil inlet of the overflow valve is connected in the connecting pipe between second pressure-gradient control valve and the second one-way valve,
The oil return opening of the overflow valve is connect with the hydraulic oil container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821584240.0U CN209146011U (en) | 2018-09-27 | 2018-09-27 | A kind of excavator single argument pump hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821584240.0U CN209146011U (en) | 2018-09-27 | 2018-09-27 | A kind of excavator single argument pump hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209146011U true CN209146011U (en) | 2019-07-23 |
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ID=67267248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821584240.0U Active CN209146011U (en) | 2018-09-27 | 2018-09-27 | A kind of excavator single argument pump hydraulic system |
Country Status (1)
| Country | Link |
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| CN (1) | CN209146011U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112590922A (en) * | 2020-12-09 | 2021-04-02 | 中冶宝钢技术服务有限公司 | Steering control device and control method for vehicle and vehicle |
-
2018
- 2018-09-27 CN CN201821584240.0U patent/CN209146011U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112590922A (en) * | 2020-12-09 | 2021-04-02 | 中冶宝钢技术服务有限公司 | Steering control device and control method for vehicle and vehicle |
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