CN104564877A - Pressure reducing and throttling system for excavators - Google Patents
Pressure reducing and throttling system for excavators Download PDFInfo
- Publication number
- CN104564877A CN104564877A CN201410769774.0A CN201410769774A CN104564877A CN 104564877 A CN104564877 A CN 104564877A CN 201410769774 A CN201410769774 A CN 201410769774A CN 104564877 A CN104564877 A CN 104564877A
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- China
- Prior art keywords
- valve
- way
- pressure reducing
- damping hole
- way valve
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- 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.)
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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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses a pressure reducing and throttling system for excavators. A first reducing valve is connected in series with a first throttling orifice and then respectively connected in parallel with a first damping orifice and a first check valve, a first overflow valve is connected in series with the first damping orifice, the spring end control port of the first reducing valve is connected between the first overflow valve and the first damping orifice, and the first overflow valve, the first reducing valve, the first damping orifice, the first throttling orifice and the first check valve jointly form a reducing and throttling valve I; a second reducing valve is connected in series with a second throttling orifice and then respectively connected in parallel with a second damping orifice and a second check valve, a second overflow valve is connected in series with the second damping orifice, the spring end control port of the second reducing valve is connected between the second overflow valve and the second damping orifice, and the second overflow valve, the second reducing valve, the second damping orifice, the second throttling orifice and the second check valve jointly form a reducing and throttling valve II. The pressure reducing and throttling system for excavators has the advantage that the pressure reducing and throttling system for excavators can decrease pressure and flow entering an actuator from the pressure reducing and throttling system, ensures that flow cannot fluctuate as load changes, and is easy to operate.
Description
Technical field
The present invention relates to a kind of excavator decompression throttle system, belong to hydraulic system pressure and Flow-rate adjustment technical field.
Background technique
In minus flow hydraulic system, when system pressure and flow all lower than excavator of the working pressure needed for executive component and flow, need to adjust the pressure of excavator and flow to meet the requirement of executive component.Pressure regulative mode is relief valve in parallel or series connection one way pressure-reducing valve on pressure duct, and Flow-rate adjustment mode is that the openings of sizes by controlling pilot handle realizes.The shortcoming of this mode is: when adopting relief valve to reduce the pressure of a certain branch road, when the multiple executive component of excavator works simultaneously, because the pressure oil between each executive component communicates, relief valve can make the pressure of other executive component all lower.When adopting one way pressure-reducing valve to reduce the pressure of a certain branch road, then can not produce above-mentioned phenomenon.But, be use relief valve or one way pressure-reducing valve all can not adjust flux.Excavator is at invariable power MODE of operation, and along with the change of load, flow system flow is in continuous change, executive component constant flow is entered to keep, constantly must adjust the openings of sizes of pilot handle, have very high requirement to operation skill, easily make operator produce fatigue.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of excavator decompression throttle system, when the system pressure of excavator and flow are greater than pressure required for executive component and flow, reduce the pressure and the flow that enter executive component.
To achieve these goals, the technical solution used in the present invention is: a kind of excavator decompression throttle system, comprises the first relief valve, the first reduction valve, the first damping hole, first segment discharge orifice, the first one-way valve, the second relief valve, the second reduction valve, the second damping hole, second section discharge orifice, the second one-way valve; First reduction valve is in parallel with the first damping hole and the first one-way valve respectively after connecting with first segment discharge orifice, first relief valve is connected with the first damping hole, the spring terminal of the first reduction valve controls mouth and is connected between the first relief valve and the first damping hole, and the first relief valve, the first reduction valve, the first damping hole, first segment discharge orifice and the first one-way valve form pressure reducing throttle valve I jointly; Second reduction valve is in parallel with the second damping hole and the second one-way valve respectively after connecting with second section discharge orifice, second relief valve is connected with the second damping hole, the spring terminal of the second reduction valve controls mouth and is connected between the second relief valve and the second damping hole, and the second relief valve, the second reduction valve, the second damping hole, second section discharge orifice, the second one-way valve form pressure reducing throttle valve II jointly.
Further, the present invention also comprises the 3rd one-way valve, the 4th one-way valve and the 3rd relief valve, and the outlet of pressure reducing throttle valve I divides two-way, and a road connects one end oil pocket of executive component, and another road connects the 3rd one-way valve; The outlet of pressure reducing throttle valve II is divided into two-way, and a road connects the other end oil pocket of executive component, and another road connects the 4th one-way valve; 3rd one-way valve and the 4th one-way valve differential concatenation, the outlet between the 3rd one-way valve with the 4th one-way valve is connected the 3rd relief valve, and the first relief valve is connected at T mouth with the 3rd relief valve.
Described pressure reducing throttle valve I, pressure reducing throttle valve II, the 3rd one-way valve, the 4th one-way valve and the 3rd relief valve are integrated in a valve block.
The invention has the beneficial effects as follows: when the multiple action of excavator works simultaneously, the pressure and flow that enter executive component can be reduced, guaranteed flow does not produce fluctuation with the change of load, the opening of pilot handle only need be transferred to maximum by operator in operation, the opening of pilot handle need not be adjusted the moment, simple to operate; And the present invention can ensure that the pressure of other executive component is unaffected while use.
Accompanying drawing explanation
Fig. 1 is present system connection diagram.
In figure: 1, the first relief valve, the 2, first reduction valve, the 3, first damping hole, 4, first segment discharge orifice, the 5, first one-way valve, the 6, the 3rd one-way valve, 7, the 4th one-way valve, the 8, the 3rd relief valve, 9, second section discharge orifice, 10, the second one-way valve, the 11, second damping hole, the 12, second reduction valve, 13, the second relief valve, 14, pressure reducing throttle valve I, 15, pressure reducing throttle valve II, 16 selector valve.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1: the present invention includes the first relief valve 1, first reduction valve 2, first damping hole 3, first segment discharge orifice 4, first one-way valve 5, second relief valve 13, second reduction valve 12, second damping hole 11, second section discharge orifice 9, second one-way valve 10; First reduction valve 2 is in parallel with the first damping hole 3 and the first one-way valve 5 respectively after connecting with first segment discharge orifice 4, first relief valve 1 is connected with the first damping hole 3, the spring terminal of the first reduction valve 2 controls mouth and is connected between the first relief valve 1 and the first damping hole 3, and the first relief valve 1, first reduction valve 2, first damping hole 3, first segment discharge orifice 4 and the first one-way valve 5 form pressure reducing throttle valve I 14 jointly; Second reduction valve 12 is in parallel with the second damping hole 11 and the second one-way valve 10 respectively after connecting with second section discharge orifice 9, second relief valve 13 is connected with the second damping hole 11, the spring terminal of the second reduction valve 12 controls mouth and is connected between the second relief valve 13 and the second damping hole 11, and the second relief valve 13, second reduction valve 12, second damping hole 11, second section discharge orifice 9, second one-way valve 10 form pressure reducing throttle valve II 15 jointly.
When the logical oil in the left position of selector valve 16, the oil-feed of B mouth, the oil return of A mouth, the first reduction valve 2 is connected with first segment discharge orifice 4, then in parallel with the first damping hole 3, and these three valves are combined, and realize the flow control to executive component.The flow entering executive component is regulated by the opening area of adjustment first segment discharge orifice 4; The effect of the first relief valve 1 ensures that the pressure of A1 mouth is not more than the rated pressure of executive component; The oil of A2 mouth flows back to fuel tank by the second one-way valve 10 and selector valve 16.When the logical oil in the right position of selector valve 16, the oil-feed of A mouth, the oil return of B mouth, it is same that principle and the left position of selector valve 16 lead to oil phase.
The present invention can also comprise the 3rd one-way valve 6, the 4th one-way valve 7 and the 3rd relief valve 8, and the outlet of pressure reducing throttle valve I 14 divides two-way, and a road connects one end oil pocket of executive component, and another road connects the 3rd one-way valve 6; The outlet of pressure reducing throttle valve II 15 is divided into two-way, and a road connects the other end oil pocket of executive component, and another road connects the 4th one-way valve 7; 3rd one-way valve 6 and the 4th one-way valve 7 differential concatenation, outlet between 3rd one-way valve 6 with the 4th one-way valve 7 is connected the 3rd relief valve 8, first relief valve 1 is connected at T mouth with the 3rd relief valve 8, setting in this way, the hydraulic shock produced when executive component transships suddenly can be absorbed, ensure the safety of executive component, when certain element fault causes the pressure in executive component to discharge, the pressure of executive component two ends oil pocket also can be unloaded by the pressure reducing the 3rd relief valve 8.
Pressure reducing throttle valve I 14, pressure reducing throttle valve II 15, the 3rd one-way valve 6, the 4th one-way valve 7 and the 3rd relief valve 8 are integrated in a valve block, and structure is compacter, is also convenient to follow-up I&M.
Claims (3)
1. an excavator decompression throttle system, is characterized in that comprising the first relief valve (1), the first reduction valve (2), the first damping hole (3), first segment discharge orifice (4), the first one-way valve (5), the second relief valve (13), the second reduction valve (12), the second damping hole (11), second section discharge orifice (9), the second one-way valve (10), first reduction valve (2) is in parallel with the first damping hole (3) and the first one-way valve (5) respectively after connecting with first segment discharge orifice (4), first relief valve (1) is connected with the first damping hole (3), the spring terminal of the first reduction valve (2) controls mouth and is connected between the first relief valve (1) and the first damping hole (3), and the first relief valve (1), the first reduction valve (2), the first damping hole (3), first segment discharge orifice (4) and the first one-way valve (5) form pressure reducing throttle valve I (14) jointly, second reduction valve (12) is in parallel with the second damping hole (11) and the second one-way valve (10) respectively after connecting with second section discharge orifice (9), second relief valve (13) is connected with the second damping hole (11), the spring terminal of the second reduction valve (12) controls mouth and is connected between the second relief valve (13) and the second damping hole (11), second relief valve (13), second reduction valve (12), second damping hole (11), second section discharge orifice (9), second one-way valve (10) forms pressure reducing throttle valve II (15) jointly, pressure reducing throttle valve I (14) is connected with one end of executive component, pressure reducing throttle valve II (15) is connected with the other end of executive component.
2. a kind of excavator decompression throttle system according to claim 1, it is characterized in that, also comprise the 3rd one-way valve (6), the 4th one-way valve (7) and the 3rd relief valve (8), the outlet of pressure reducing throttle valve I (14) divides two-way, one tunnel connects one end oil pocket of executive component, and another road connects the 3rd one-way valve (6); The outlet of pressure reducing throttle valve II (15) is divided into two-way, and a road connects the other end oil pocket of executive component, and another road connects the 4th one-way valve (7); 3rd one-way valve (6) and the 4th one-way valve (7) differential concatenation, the outlet between the 3rd one-way valve (6) with the 4th one-way valve (7) is connected the 3rd relief valve (8), and the first relief valve (1) is connected at T mouth with the 3rd relief valve (8).
3. a kind of excavator decompression throttle system according to claim 2, it is characterized in that, described pressure reducing throttle valve I (14), pressure reducing throttle valve the II (15), the 3rd one-way valve (6), the 4th one-way valve (7) and the 3rd relief valve (8) are integrated in a valve 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 true CN104564877A (en) | 2015-04-29 |
| CN104564877B CN104564877B (en) | 2017-09-29 |
Family
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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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402072A (en) * | 2016-10-10 | 2017-02-15 | 合肥协力液压科技有限公司 | Electromagnetic relief pressure 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109950A (en) * | 1993-09-07 | 1995-10-11 | 株式会社神户制钢所 | Hydraulic device for construction machinery |
| US6367365B1 (en) * | 1998-06-29 | 2002-04-09 | Mannesmann Rexroth Ag | Hydraulic circuit |
| CN101166904A (en) * | 2005-04-29 | 2008-04-23 | 卡特彼勒公司 | Hydraulic system having a pressure compensator |
| CN101956733A (en) * | 2009-07-20 | 2011-01-26 | J.C.班福德挖掘机有限公司 | Hydraulic system |
| CN104141326A (en) * | 2014-07-11 | 2014-11-12 | 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
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109950A (en) * | 1993-09-07 | 1995-10-11 | 株式会社神户制钢所 | Hydraulic device for construction machinery |
| US6367365B1 (en) * | 1998-06-29 | 2002-04-09 | Mannesmann Rexroth Ag | Hydraulic circuit |
| CN101166904A (en) * | 2005-04-29 | 2008-04-23 | 卡特彼勒公司 | Hydraulic system having a pressure compensator |
| CN101956733A (en) * | 2009-07-20 | 2011-01-26 | J.C.班福德挖掘机有限公司 | Hydraulic system |
| CN104141326A (en) * | 2014-07-11 | 2014-11-12 | 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402072A (en) * | 2016-10-10 | 2017-02-15 | 合肥协力液压科技有限公司 | Electromagnetic relief pressure throttle valve |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104564877B (en) | 2017-09-29 |
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