CN104564877B - A kind of excavator depressurizes throttle system - Google Patents
A kind of excavator depressurizes throttle system Download PDFInfo
- Publication number
- CN104564877B CN104564877B CN201410769774.0A CN201410769774A CN104564877B CN 104564877 B CN104564877 B CN 104564877B CN 201410769774 A CN201410769774 A CN 201410769774A CN 104564877 B CN104564877 B CN 104564877B
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- China
- Prior art keywords
- valve
- pressure
- reducing
- damping hole
- throttle
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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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
Abstract
Throttle system is depressurized the invention discloses a kind of excavator, first pressure-reducing valve is in parallel with the first damping hole and the first check valve respectively after being connected with first segment discharge orifice, first overflow valve is connected with the first damping hole, the spring terminal control mouth of first pressure-reducing valve is connected between the first overflow valve and the first damping hole, and the first overflow valve, the first pressure-reducing valve, the first damping hole, first segment discharge orifice and the first check valve collectively form pressure reducing throttle valve I；Second pressure-reducing valve is in parallel with the second damping hole and the second check valve respectively after being connected with the second throttle orifice, second overflow valve is connected with the second damping hole, the spring terminal control mouth of second pressure-reducing valve is connected between the second overflow valve and the second damping hole, and the second overflow valve, the second pressure-reducing valve, the second damping hole, the second throttle orifice, the second check valve collectively form pressure reducing throttle valve II.Beneficial effect is can to reduce the pressure and flow that enter executive component by this decompression throttle system, it is ensured that flow does not produce fluctuation with the change of load, simple to operate.
Description
Technical field
Throttle system is depressurized the present invention relates to a kind of excavator, belongs to hydraulic system pressure and Flow-rate adjustment technical field.
Background technology
In minus flow hydraulic system, when the operating pressure and flow needed for executive component are below the system pressure of excavator
, it is necessary to adjust the pressure and flow of excavator to meet the requirement of executive component when power and flow.Pressure regulative mode is in height
Overflow valve in parallel or series connection one way pressure-reducing valve on pressure pipe road, Flow-rate adjustment mode is the openings of sizes by controlling pilot handle
To realize.The shortcoming of this mode is：When the pressure of a certain branch road is reduced using overflow valve, when the multiple executive components of excavator
When working simultaneously, because the pressure oil between each executive component is communicated, overflow valve can make the pressure of other executive components
All lower.When reducing the pressure of a certain branch road using one way pressure-reducing valve, then above-mentioned phenomenon will not be produced.But, either make
Flow can not be all adjusted with overflow valve or one way pressure-reducing valve.Excavator is worked under constant power mode, with the change of load
Change, flow system flow is constantly changing, to keep constant into executive component flow, it is necessary to constantly adjust pilot handle
Openings of sizes, there is very high requirement to operation skill, operator is produced fatigue.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of excavator decompression throttle system, work as excavator
System pressure and flow be more than executive component required for pressure and flow when, be lowered into the pressure and stream of executive component
Amount.
To achieve these goals, the technical solution adopted by the present invention is：A kind of excavator decompression throttle system, including the
One overflow valve, the first pressure-reducing valve, the first damping hole, first segment discharge orifice, the first check valve, the second overflow valve, the second pressure-reducing valve,
Two damping holes, the second throttle orifice, the second check valve；First pressure-reducing valve connected with first segment discharge orifice after respectively with the first damping hole and
First check valve is in parallel, and the first overflow valve is connected with the first damping hole, and the spring terminal control mouth of the first pressure-reducing valve is connected to first
Between overflow valve and the first damping hole, the first overflow valve, the first pressure-reducing valve, the first damping hole, first segment discharge orifice and first are unidirectional
Valve collectively forms pressure reducing throttle valve I；Second pressure-reducing valve is unidirectional with the second damping hole and second respectively after being connected with the second throttle orifice
Valve is in parallel, and the second overflow valve is connected with the second damping hole, the spring terminal control mouth of the second pressure-reducing valve be connected to the second overflow valve with
Between second damping hole, the second overflow valve, the second pressure-reducing valve, the second damping hole, the second throttle orifice, the second check valve are collectively formed
Pressure reducing throttle valve II.
Further, present invention additionally comprises the 3rd check valve, the 4th check valve and the 3rd overflow valve, pressure reducing throttle valve I
Outlet point two-way, connects one end oil pocket of executive component all the way, and another road connects the 3rd check valve；The outlet of pressure reducing throttle valve II
It is divided into two-way, the other end oil pocket of executive component is connected all the way, another road connects the 4th check valve；3rd check valve and the 4th list
To valve differential concatenation, the outlet between the 3rd check valve and the 4th check valve connects the 3rd overflow valve, the first overflow valve and the 3rd
Overflow valve is connected at T mouthfuls.
The pressure reducing throttle valve I, pressure reducing throttle valve II, the 3rd check valve, the 4th check valve and the 3rd overflow valve are integrated in
In one valve block.
The beneficial effects of the invention are as follows：When the multiple actions of excavator work simultaneously, executive component can be lowered into
Pressure and flow, it is ensured that flow does not produce fluctuation with the change of load, and operator in operation only need to be by pilot handle
Opening is transferred to maximum, it is not necessary to which the moment adjusts the opening of pilot handle, simple to operate；And the present invention can be protected while using
The pressure for demonstrate,proving other executive components is unaffected.
Brief description of the drawings
Fig. 1 is present system connection diagram.
In figure：1st, the first overflow valve, the 2, first pressure-reducing valve, the 3, first damping hole, 4, first segment discharge orifice, 5, first is unidirectional
Valve, the 6, the 3rd check valve, the 7, the 4th check valve, the 8, the 3rd overflow valve, the 9, second throttle orifice, the 10, second check valve, 11, second
Damping hole, the 12, second pressure-reducing valve, the 13, second overflow valve, 14, pressure reducing throttle valve I, 15, pressure reducing throttle valve II, 16 reversal valves.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1：The present invention include the first overflow valve 1, the first pressure-reducing valve 2, the first damping hole 3, first segment discharge orifice 4,
First check valve 5, the second overflow valve 13, the second pressure-reducing valve 12, the second damping hole 11, the second throttle orifice 9, the second check valve 10；
First pressure-reducing valve 2 is in parallel with the first damping hole 3 and the first check valve 5 respectively after being connected with first segment discharge orifice 4, the first overflow valve 1
Connected with the first damping hole 3, the spring terminal control mouth of the first pressure-reducing valve 2 be connected to the first overflow valve 1 and the first damping hole 3 it
Between, the first overflow valve 1, the first pressure-reducing valve 2, the first damping hole 3, the check valve 5 of first segment discharge orifice 4 and first collectively form decompression section
Flow valve I 14；Second pressure-reducing valve 12 is in parallel with the second damping hole 11 and the second check valve 10 respectively after being connected with the second throttle orifice 9,
Second overflow valve 13 is connected with the second damping hole 11, and the spring terminal control mouth of the second pressure-reducing valve 12 is connected to the He of the second overflow valve 13
Between second damping hole 11, the second overflow valve 13, the second pressure-reducing valve 12, the second damping hole 11, the second throttle orifice 9, second are unidirectional
Valve 10 collectively forms pressure reducing throttle valve II 15.
When the logical oil in the left position of reversal valve 16, B mouthfuls of oil-feeds, A mouthfuls of oil returns, the first pressure-reducing valve 2 are connected with first segment discharge orifice 4, so
In parallel with the first damping hole 3 afterwards, these three valve groups are combined, and realize and the flow of single-rod piston cylinder is controlled.Pass through adjustment the
The aperture area regulation of one throttle orifice 4 enters the flow of single-rod piston cylinder；The effect of first overflow valve 1 is the pressure of A1 mouthfuls of guarantee
The no more than rated pressure of single-rod piston cylinder；A2 mouthfuls of oil flows back to fuel tank by the second check valve 10 and reversal valve 16.Work as commutation
When the right position of valve 16 is logical oily, A mouthfuls of oil-feeds, B mouthfuls of oil returns, the logical oil phase of principle and the left position of reversal valve 16 are same.
The present invention can also include the 3rd check valve 6, the 4th check valve 7 and the 3rd overflow valve 8, pressure reducing throttle valve I 14
Outlet point two-way, connects one end oil pocket of single-rod piston cylinder all the way, and another road connects the 3rd check valve 6；Pressure reducing throttle valve II 15
Outlet be divided into two-way, the other end oil pocket of single-rod piston cylinder is connected all the way, another road connects the 4th check valve 7；3rd is unidirectional
Valve 6 and the differential concatenation of the 4th check valve 7, the outlet between the 3rd check valve 6 and the 4th check valve 7 connect the 3rd overflow valve 8, the
One overflow valve 1 is connected with the 3rd overflow valve 8 at T mouthfuls, setting in this way, can absorb single-rod piston cylinder and overload suddenly
When produced hydraulic shock, it is ensured that the safety of single-rod piston cylinder, when some element fault causes the pressure in single-rod piston cylinder
When can not discharge, the pressure of single-rod piston cylinder two ends oil pocket can also be unloaded by reducing the pressure of the 3rd overflow valve 8.
Pressure reducing throttle valve I 14, pressure reducing throttle valve II 15, the 3rd check valve 6, the 4th check valve 7 and the 3rd overflow valve 8 are integrated
In a valve block, structure is compacter, also allows for follow-up I＆M.
Claims (3)
1. a kind of excavator depressurizes throttle system, it is characterised in that including the first overflow valve (1), the first pressure-reducing valve (2), first
Damping hole (3), first segment discharge orifice (4), the first check valve (5), the second overflow valve (13), the second pressure-reducing valve (12), the second damping
Hole (11), the second throttle orifice (9), the second check valve (10)；First pressure-reducing valve (2) connected with first segment discharge orifice (4) after respectively with
First damping hole (3) and the first check valve (5) are in parallel, and the first overflow valve (1) is connected with the first damping hole (3), the first pressure-reducing valve
(2) spring terminal control mouth is connected between the first overflow valve (1) and the first damping hole (3), and the first overflow valve (1), first subtract
Pressure valve (2), the first damping hole (3), first segment discharge orifice (4) and the first check valve (5) collectively form pressure reducing throttle valve I (14)；The
Two pressure-reducing valves (12) are in parallel with the second damping hole (11) and the second check valve (10) respectively after being connected with the second throttle orifice (9), the
Two overflow valves (13) are connected with the second damping hole (11), and the spring terminal control mouth of the second pressure-reducing valve (12) is connected to the second overflow valve
(13) between the second damping hole (11), the second overflow valve (13), the second pressure-reducing valve (12), the second damping hole (11), second section
Discharge orifice (9), the second check valve (10) collectively form pressure reducing throttle valve II (15), pressure reducing throttle valve I (14) and single-rod piston cylinder
One end is connected, and pressure reducing throttle valve II (15) is connected with the other end of single-rod piston cylinder.
2. a kind of excavator decompression throttle system according to claim 1, it is characterised in that also including the 3rd check valve
(6), the 4th check valve (7) and the 3rd overflow valve (8), the outlet point two-way of pressure reducing throttle valve I (14), connect single-rod piston all the way
One end oil pocket of cylinder, another road connects the 3rd check valve (6)；The outlet of pressure reducing throttle valve II (15) is divided into two-way, connects all the way
The other end oil pocket of single-rod piston cylinder, another road connects the 4th check valve (7)；3rd check valve (6) is anti-with the 4th check valve (7)
To series connection, the outlet between the 3rd check valve (6) and the 4th check valve (7) is connected the 3rd overflow valve (8), the first overflow valve (1)
It is connected with the 3rd overflow valve (8) at T mouthfuls.
3. a kind of excavator decompression throttle system according to claim 2, it is characterised in that the pressure reducing throttle valve I
(14), pressure reducing throttle valve II (15), the 3rd check valve (6), the 4th check valve (7) and the 3rd overflow valve (8) are integrated in a valve
In block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410769774.0A CN104564877B (en) | 2014-12-15 | 2014-12-15 | A kind of excavator depressurizes throttle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410769774.0A CN104564877B (en) | 2014-12-15 | 2014-12-15 | A kind of excavator depressurizes throttle system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104564877A CN104564877A (en) | 2015-04-29 |
| CN104564877B true CN104564877B (en) | 2017-09-29 |
Family
ID=53081717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410769774.0A Active CN104564877B (en) | 2014-12-15 | 2014-12-15 | A kind of excavator depressurizes throttle system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104564877B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402072B (en) * | 2016-10-10 | 2018-12-14 | 合肥协力液压科技有限公司 | Electromagnetic pressure-decreasing throttle valve |
| CN107269628A (en) * | 2017-07-28 | 2017-10-20 | 重集团大连工程技术有限公司 | A kind of vertical heavy load stall protection loop |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07127607A (en) * | 1993-09-07 | 1995-05-16 | Yutani Heavy Ind Ltd | Hydraulic device of work machine |
| DE19828963A1 (en) * | 1998-06-29 | 1999-12-30 | Mannesmann Rexroth Ag | Hydraulic switch system for the operation of low- and high-load units |
| US7204185B2 (en) * | 2005-04-29 | 2007-04-17 | Caterpillar Inc | Hydraulic system having a pressure compensator |
| GB0912540D0 (en) * | 2009-07-20 | 2009-08-26 | Bamford Excavators Ltd | Hydraulic system |
| CN104141326B (en) * | 2014-07-11 | 2017-05-03 | 徐州徐工挖掘机械有限公司 | Energy-saving control system for excavator |
| CN204921522U (en) * | 2015-09-11 | 2015-12-30 | 徐州徐工挖掘机械有限公司 | Excavator decompression throttle system |
-
2014
- 2014-12-15 CN CN201410769774.0A patent/CN104564877B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104564877A (en) | 2015-04-29 |
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