CN109183892A - Equipment drives oil circuit and excavator - Google Patents
Equipment drives oil circuit and excavator Download PDFInfo
- Publication number
- CN109183892A CN109183892A CN201811104904.3A CN201811104904A CN109183892A CN 109183892 A CN109183892 A CN 109183892A CN 201811104904 A CN201811104904 A CN 201811104904A CN 109183892 A CN109183892 A CN 109183892A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve block
- fluid port
- oil
- hydraulic fluid
- 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.)
- Granted
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The present invention relates to excavator hydraulic systems, it is also truncated to solve to will lead to idle signal using the working oil path that interflow valve block is truncated in positioning joint in existing excavator hydraulic system, makes can not to make when operating certain one action after complete machine idling vehicle to be resumed work state issues；A kind of equipment driving oil circuit is provided, the right pump that left pump, the pumping hole connecting including hydraulic execution component, interflow valve block, movement valve block, pumping hole with interflow valve block work oil inlet are connect with movement valve block work oil inlet.When the positioning joint of converging valve piece spool and either end contacts, work oil inlet to the oil circuit between work oil outlet of converging valve on piece ends, oil circuit cut-off between idling hydraulic fluid port before hydraulic fluid port to valve before idle valve.The present invention does not influence the triggering of idle signal while the working oil path to interflow valve block is truncated, and can restore complete machine to normal operating conditions from idling mode when executing certain movement.
Description
Technical field
The present invention relates to a kind of excavator hydraulic systems, drive oil circuit and digging more specifically to a kind of equipment
Pick machine.
Background technique
The hydraulic system of excavator is usually double pump oil supply system, in the hydraulic execution such as its equipment such as swing arm, dipper
Bivalve control is generallyd use in the drive control of component, i.e., using movement valve block and interflow valve block oil-feeding control, collaborates valve block
Actuator port in some interface with hydraulic braking device behind the actuator port interflow of at least one hydraulic fluid port and movement valve block
Connection, such as connect with the big chamber of boom cylinder or bucket arm cylinder, realize the quick acting response of boom cylinder or bucket arm cylinder.
Excavator is as a kind of engineering machinery that use is very extensive, frequently by replacement equipment to adapt to difference
Operating condition, for example, super high-front shovel be exactly be above standard by using length dipper overlength dipper replacement full-length dipper,
Realize that excavator is constructed under the operating condition that dredging, shore protection, slope surface and subway construction etc. are limited by ground environment.Due to its work
The length of device increases, and for security needs, the movement speed of overlength arm is slowed down, to enhance the stability and protection work of complete machine
Make the effect of apparatus structure part.In existing excavator, realize that the mode that the movement of overlength arm slows down is usually to limit driving overlength arm
Hydraulic execution component flow.Existing excavator dual-pump combining hydraulic system current-limiting mode is by way of positioning joint
Corresponding interflow valve block flow is cut off, limitation acts valve block flow and slows down one action effect to reach.
The stroke of spool in the valve block of interflow is limited using positioning joint, spool both ends of the positioning joint in the valve block of interflow are pushed up
Firmly spool is maintained at middle position so that spool is immovable, and the working solution pressure oil of hydraulic pump cannot be entered pair by collaborating valve block
The hydraulic execution component answered.Other oil circuit signals, such as idle signal oil circuit are set in converging valve on piece, in idle signal oil
Idle signal switch is provided on the valve front oil duct on road, when the spool for collaborating valve block is in left position or right position, idle signal oil
Road is truncated by interflow valve block, and idle signal oil circuit establishes pressure before valve, detect idle signal switch and to engine control
The electric signal of system end of output idling mode processed.When the spool for collaborating valve block is in middle position, idle signal oil circuit passes through conjunction
It flows valve block and leads directly to fuel tank circuit, idle signal oil circuit cannot establish pressure before valve, thus will not end of output idling mode
Signal, therefore when certain one action is operated after complete machine idling, can not make vehicle resume work state.
Summary of the invention
The technical problem to be solved by the present invention is to be collaborated in existing excavator hydraulic system using positioning joint truncation
The working oil path of valve block will lead to idle signal and also be truncated, and make vehicle can not be made to restore when operating certain one action after complete machine idling
Working condition problem, and a kind of equipment driving oil circuit and excavator are provided, so that the working oil path of interflow valve block is truncated
The work of idle signal oil circuit is not influenced afterwards, vehicle after certain one action is operated after complete machine idling can resume work shape.
The present invention is to realize that the technical solution of its purpose is such that provide a kind of equipment driving oil circuit, including liquid
Pressure executes left pump, pumping hole and the movement that component, interflow valve block, movement valve block, pumping hole are connect with interflow valve block work oil inlet
Valve block work oil inlet connection right pump, it is described interflow valve block work oil outlet with act valve block first work oil outlet connect
Afterwards with it is described it is hydraulic execute component the first hydraulic fluid port connect, act valve block second work oil outlet connect after with it is described hydraulic
Execute the second hydraulic fluid port connection of component；Before converging valve piece upper valve idling hydraulic fluid port connect with pilot pressure oil sources, converging valve on piece
Idling hydraulic fluid port is connect with fuel tank circuit after valve, is provided with idling pressure on the oil circuit that idling hydraulic fluid port connects before converging valve piece upper valve and is opened
It closes；The positioning joint limited to its spool shift motion is provided in converging valve on piece, it is characterised in that when the interflow
When valve block spool is in middle position, collaborate that there is gap and the converging valve between the spool both ends of valve block and the positioning joint at both ends
The work oil inlet of on piece to oil circuit between work oil outlet ends, and oil circuit is led between idling hydraulic fluid port before hydraulic fluid port to valve before idle valve
It is logical；When the positioning joint of the converging valve piece spool and either end contacts, the work oil inlet of the converging valve on piece to work
Make oil circuit between oil outlet to end, oil circuit cut-off between idling hydraulic fluid port before hydraulic fluid port to valve before idle valve.
The present invention is to realize that the technical solution of its purpose is such that provide a kind of excavator, it is characterised in that before having
The equipment driving oil circuit stated.Further, the liquid activates the boom cylinder or bucket arm cylinder that dynamic device is excavator, institute
The first hydraulic fluid port is stated to be connected to the big chamber of oil cylinder.
Compared with prior art, the present invention the present invention need be truncated interflow valve block to hydraulic execution component fuel feeding when,
It can guarantee the normal on-off of idle signal oil circuit controlled by interflow valve block, it can by the operation to interflow valve block after complete machine idling
Triggering idling pressure switch makes complete machine exit idling mode and restores to working condition.
Detailed description of the invention
Fig. 1 is equipment driving asphalt principle figure of the present invention.
Parts title and serial number in figure:
Action tank 1, interflow valve block 2, movement valve block 3, pilot signal oil circuit 4, positioning joint 5, left pump pumping hole oil circuit 6,
Right pump pumping hole oil circuit 7, pioneer pump pumping hole oil circuit 8, other valve block oil feeding lines 9.
Specific embodiment
Illustrate specific embodiment with reference to the accompanying drawing.
Fig. 1 shows the part driving oil circuit of digger operating device comprising and it is action tank 1 that liquid, which activates dynamic device,
Action tank 1 can be boom cylinder, be also possible to bucket cylinder.Action tank 1 is controlled by interflow valve block 2 and movement valve block 3.
The the first work oil inlet A and the second work oil inlet B of interflow valve block 2 are connect by left pump pumping hole oil circuit 6 with left pump pumping hole, are moved
The oil inlet for making valve block 3 is connect by right pump pumping hole oil circuit 7 with right pump pumping hole.Collaborate the second work oil outlet D of valve block 2 and moves
It is connect after making the second work oil outlet H connection of valve block 3 with the second hydraulic fluid port (small chamber hydraulic fluid port) of action tank, interflow valve block 2
First work oil outlet E connect with the first work oil outlet I for acting valve block 3 after with the first hydraulic fluid port of action tank 1 (big chamber is oily
Mouthful) connection.Interflow valve block 2 and the hydraulic control end for acting valve block 3 are connect with pilot signal oil circuit 4.Idling is oily before collaborating 2 upper valve of valve block
Mouth C with pioneer pump pumping hole oil circuit 8 with the pumping hole of pioneer pump by connecting, converging valve, idling hydraulic fluid port G and fuel tank circuit after 2 upper valves
It connects, is provided with idling pressure switch 10 on the oil circuit of idling hydraulic fluid port C connection before 2 upper valve of valve block of interflow.
When the spool for collaborating valve block 2 is in middle position namely pilot signal oil circuit 4 is acted on without effective pilot pressure
When collaborating the spool of valve block 2, collaborates that there is gap between the spool both ends of valve block 2 and the positioning joint 5 at both ends, collaborate valve block 2
On first work oil inlet A to first work oil outlet E and second work oil outlet D oil circuit be turned off, collaborate valve block 2 on
Oil circuit of the second work oil inlet B to other valve blocks for oil export F be connected, the hydraulic oil of left pump output is through interflow valve block 2
Second work oil inlet B, other valve blocks are for oil export F and other valve block oil feeding lines 9 to other valve block fuel feeding.Collaborate valve block 2
Straight-through fuel tank circuit is connected with the oil circuit after valve between idling hydraulic fluid port G by idling hydraulic fluid port C before upper valve, and idling pressure switch 10 is in not
The state of triggering.
When guide's signal oil road 4 has effective pilot pressure, the spool commutation of movement valve block 3, the liquid of right pump output
Pressure oil enters the big chamber or small chamber of action tank 1 by acting valve block 3, collaborates the spool of valve block 2 also in guide oil pressure
Lower movement is pushed, but does fraction of movement only convenient for positioning joint 5 contacts and is limited, the spool of interflow valve block 2 connects with limit
When first 5 contact, collaborate the oil of the first work work of work oil outlet E and second of oil inlet A to first oil outlet D on valve block 2
Road still keeps ending, and oil circuit of the second work oil inlet B to other valve blocks for oil export F collaborated on valve block 2 is still connected, left pump
The hydraulic oil of output is collaborated the second work oil inlet B of valve block 2, other valve blocks for oil export F and other valve block oil feeding lines 9
To other valve block fuel feeding.Collaborate the oil circuit before 2 upper valve of valve block after idling hydraulic fluid port C and valve between idling hydraulic fluid port G to end, collaborates valve block
Idling hydraulic fluid port C sets up pressure activated idling pressure switch 10 before 2 upper valves, and engine control system receives idling pressure switch
After 10 trigger signal, it is restored to normal operating conditions.
Digger operating device in the present embodiment drives oil circuit, when equipment is normal configuration (without dynamic to some
Make carry out speed limit) when, valve block both ends will be collaborated, the positioning joint that spool stroke limits is taken out or is moved to normal position, so that
The spool for collaborating valve block has normal displacement under the pilot pressure effect on guide's signal oil road, realizes that excavator is normally grasped
Make.When be equipped on excavator be overlength arm (overlength dipper or overlength swing arm) equipment and when needing speed limit, then will limit
Connector is moved to restraining position, so that the spool of interflow valve block has fraction of position under the action of guide oil pressure near middle position
Move, the displacement so that the oil circuit before converging valve piece upper valve after idling hydraulic fluid port C and valve between idling hydraulic fluid port G ends, establish pressure and
Idling pressure switch 10 is triggered, the idling mode of complete machine is released.And spool of other oil circuits then with interflow valve block is in middle position
When state consistency.The movement speed of action tank had not only been limited in this way, but also did not influenced the releasing of complete machine idling mode.
Claims (3)
1. a kind of equipment drives oil circuit, including hydraulic execution component, interflow valve block, movement valve block, pumping hole and converging valve
The right pump that left pump, the pumping hole of piece work oil inlet connection are connect with movement valve block work oil inlet, the interflow valve block work out
Hydraulic fluid port is connect after connecting with the first work oil outlet of movement valve block with hydraulic first hydraulic fluid port for executing component, operating valve
Second work oil outlet of piece is connect with hydraulic second hydraulic fluid port for executing component；Before converging valve piece upper valve idling hydraulic fluid port with
Idling hydraulic fluid port is connect with fuel tank circuit after the connection of pilot pressure oil sources, converging valve piece upper valve, idling hydraulic fluid port before converging valve piece upper valve
Idling pressure switch is provided on the oil circuit of connection；The limit limited to its spool shift motion is provided in converging valve on piece
Position connector, it is characterised in that when the converging valve piece spool is in middle position, collaborate spool both ends and the limit at both ends of valve block
Work oil inlet to oil circuit between work oil outlet with gap and the converging valve on piece between connector ends, before idle valve
Oil circuit is connected between idling hydraulic fluid port before hydraulic fluid port to valve；When the positioning joint of the converging valve piece spool and either end contacts, institute
The work oil inlet of converging valve on piece is stated to oil circuit cut-off between work oil outlet, before idle valve before hydraulic fluid port to valve idling hydraulic fluid port it
Between oil circuit end.
2. a kind of excavator, it is characterised in that drive oil circuit with the equipment in claim 1.
3. excavator according to claim 2, it is characterised in that the hydraulic component that executes is the swing arm oil of excavator
Cylinder or bucket arm cylinder, first hydraulic fluid port are connected to the big chamber of oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811104904.3A CN109183892B (en) | 2018-09-21 | 2018-09-21 | Working device driving oil way and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811104904.3A CN109183892B (en) | 2018-09-21 | 2018-09-21 | Working device driving oil way and excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109183892A true CN109183892A (en) | 2019-01-11 |
| CN109183892B CN109183892B (en) | 2021-05-14 |
Family
ID=64909073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811104904.3A Active CN109183892B (en) | 2018-09-21 | 2018-09-21 | Working device driving oil way and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109183892B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848194A (en) * | 2019-11-21 | 2020-02-28 | 徐州天睿地机械有限公司 | Externally-connected converging valve for mobile hydraulic power station |
| US11204044B2 (en) | 2020-01-08 | 2021-12-21 | Cnh Industrial America Llc | Hydraulic actuator control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10280489A (en) * | 1997-04-03 | 1998-10-20 | Sumitomo Constr Mach Co Ltd | Travel speed control circuit for construction machine |
| CN1247280A (en) * | 1998-05-28 | 2000-03-15 | 日立建机株式会社 | Engine speed control system for building machinery |
| WO2013054954A1 (en) * | 2011-10-11 | 2013-04-18 | 볼보 컨스트럭션 이큅먼트 에이비 | Actuator displacement measurement system in electronic hydraulic system of construction equipment |
| CN203891108U (en) * | 2014-04-15 | 2014-10-22 | 华侨大学 | Automatic idling system of electro-hydraulic mixing driving engineering machine |
| CN205225910U (en) * | 2015-12-21 | 2016-05-11 | 西安科技大学 | Swing arm hydraulic circuit system |
-
2018
- 2018-09-21 CN CN201811104904.3A patent/CN109183892B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10280489A (en) * | 1997-04-03 | 1998-10-20 | Sumitomo Constr Mach Co Ltd | Travel speed control circuit for construction machine |
| CN1247280A (en) * | 1998-05-28 | 2000-03-15 | 日立建机株式会社 | Engine speed control system for building machinery |
| WO2013054954A1 (en) * | 2011-10-11 | 2013-04-18 | 볼보 컨스트럭션 이큅먼트 에이비 | Actuator displacement measurement system in electronic hydraulic system of construction equipment |
| CN203891108U (en) * | 2014-04-15 | 2014-10-22 | 华侨大学 | Automatic idling system of electro-hydraulic mixing driving engineering machine |
| CN205225910U (en) * | 2015-12-21 | 2016-05-11 | 西安科技大学 | Swing arm hydraulic circuit system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848194A (en) * | 2019-11-21 | 2020-02-28 | 徐州天睿地机械有限公司 | Externally-connected converging valve for mobile hydraulic power station |
| US11204044B2 (en) | 2020-01-08 | 2021-12-21 | Cnh Industrial America Llc | Hydraulic actuator control system |
| US11719262B2 (en) | 2020-01-08 | 2023-08-08 | Cnh Industrial America Llc | Hydraulic actuator control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109183892B (en) | 2021-05-14 |
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