CN100360814C - Direct-acting type pressure-flow combined valve - Google Patents
Direct-acting type pressure-flow combined valve Download PDFInfo
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- CN100360814C CN100360814C CNB2006100491598A CN200610049159A CN100360814C CN 100360814 C CN100360814 C CN 100360814C CN B2006100491598 A CNB2006100491598 A CN B2006100491598A CN 200610049159 A CN200610049159 A CN 200610049159A CN 100360814 C CN100360814 C CN 100360814C
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- oil
- throttle valve
- suction chamber
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- 239000000945 filler Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000011324 bead Substances 0.000 abstract 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Abstract
The present invention relates to a direct-acting type pressure-flow combined valve which comprises a fixed difference overflow valve and also comprises a throttle valve with an oil inlet and an oil return port, wherein the fixed difference overflow valve is provided with an oil inlet cavity and an oil outlet cavity. A valve cavity of the throttle valve is divided into an oil inlet cavity and an oil return cavity by a valve core of the throttle valve, the oil outlet cavity is arranged between the oil inlet cavity and the oil return cavity, and valve ports are both formed between the oil inlet cavity and the oil outlet cavity of the throttle valve and between the oil return cavity and the oil outlet cavity. The valve core of the throttle valve is provided with a circular bead, a diameter of which is equivalent to a diameter of the oil return cavity of the throttle valve, and the length of the circular bead is smaller than that of the oil outlet cavity of the throttle valve. The oil inlet cavity of the fixed difference overflow valve is respectively communicated with the oil inlet cavity and the oil outlet cavity of the throttle valve by a pipe, the oil outlet cavity of the fixed difference overflow valve is communicated with the oil outlet cavity of the throttle valve, and the oil outlet cavity of the throttle valve is communicated with a load opening of the outside. The present invention has the advantages of simple structure, easy maintenance, low manufacture cost and high cost performance.
Description
(1) technical field
The present invention relates to a kind of pressure-flow combined valve.
(2) background technique
In the hydraulic system of many practical engineering application, usually require different phase in work, hydraulic pressure power unit oil hydraulic cylinder (oil hydraulic motor) is carried out the control of speed (rotating speed) or ouput force (moment), promptly need the compound control of pressure and flow.The general employing of existing pressure-flow combined valve is with pressure compensated Flow valve to realize flow control and is realized pressure control with relief valve, the pressure that it is realized and the control of flow are independently to finish, from this combination valve of structure is stack with pressure compensated Flow valve and relief valve, complex structure, be difficult to safeguard that cost is also higher relatively.
(3) summary of the invention
In order to overcome pressure-flow combined valve complex structure in the prior art, be difficult to safeguard, the deficiency that cost is also high relatively, the utility model provide a kind of simple in structure, be easy to safeguard, cost is low, price performance is high direct-acting type pressure-flow combined valve.
The technological scheme that the present invention solves its technical problem is: a kind of direct-acting type pressure-flow combined valve, comprise constant difference overflow valve, the spool of described constant difference overflow valve is divided into the valve pocket of described constant difference overflow valve oil suction chamber and goes out oil pocket, the spool of described poor relief valve has axial hole, described through hole is communicated with the oil suction chamber of described constant difference overflow valve and goes out oil pocket, also comprise a throttle valve, the spool of described throttle valve is divided into oil suction chamber and oil back chamber with the valve pocket of described throttle valve, be that diameter is greater than this oil suction chamber between the oil suction chamber of described throttle valve and the oil back chamber, oil back chamber go out oil pocket, thereby at the oil suction chamber of throttle valve with go out between the oil pocket, oil back chamber and go out all to form valve port between the oil pocket; The shared valve body of described constant difference overflow valve and described throttle valve, the oil suction chamber of described constant difference overflow valve is communicated with the oil suction chamber and the oil back chamber of described throttle valve respectively by pipeline, and the oil pocket that goes out of described constant difference overflow valve is communicated with the oil pocket that goes out of described throttle valve; The oil suction chamber of described constant difference overflow valve and the oil back chamber of throttle valve have been formed the oil back chamber of combination valve, the oil suction chamber of described constant difference overflow valve and the oil suction chamber of throttle valve have been formed the oil suction chamber of combination valve, the oil pocket that goes out that oil pocket has been formed combination valve that goes out that goes out oil pocket and throttle valve of described constant difference overflow valve, the oil back chamber of described combination valve is communicated with return opening, the oil suction chamber of described combination valve is communicated with filler opening, and the oil pocket that goes out of described combination valve is communicated with the external loading mouth; The spool of described throttle valve has shoulder, and the diameter of described shoulder equals the diameter of the oil back chamber of described throttle valve, and its length is less than the length that goes out oil pocket of described throttle valve.
Further, described filler opening is communicated with the oil suction chamber of described throttle valve, and described return opening is communicated with the oil back chamber of described throttle valve, and the oil pocket that goes out of described throttle valve is communicated with the external loading mouth.
When the shoulder on the throttle valve spool does not seal the oil back chamber of throttle valve and goes out oil pocket (oil back chamber and go out valve port between the oil pocket when closing), the utility model is in the pressure control state, the oil back chamber of throttle valve constitutes two adjustable resistance half-bridges of connecting with the valve port that goes out valve port and the oil suction chamber between the oil pocket and go out between the oil pocket, the stroke difference of throttle valve spool, the pressure of pressure oil output is also different.When the oil back chamber of the shoulder on throttle valve spool sealing throttle valve with when going out oil pocket when closing (oil back chamber and go out valve port between the oil pocket), the utility model is in the pressure control state, and the Flow-rate adjustment principle of this moment is identical with general throttle valve: oil suction chamber by the change throttle valve and the size (promptly changing size, the shape of throttle orifice) that goes out the valve port between the oil pocket realize the adjusting of flow.
Beneficial effect of the present invention is: simple in structure, be easy to safeguard low cost of manufacture, price performance height.
(4) description of drawings
Fig. 1 is the structural representation of the present invention when being in the pressure control state.
Fig. 2 is the structural representation of the present invention when being in the flow control state.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
With reference to Fig. 1,2, a kind of direct-acting type pressure-flow combined valve comprises constant difference overflow valve, has the throttle valve of filler opening 1 and return opening 2, the shared valve body of described constant difference overflow valve and described throttle valve.
The spool 3 of described constant difference overflow valve is divided into the valve pocket of described constant difference overflow valve oil suction chamber 4 and goes out oil pocket 5, and the spool of described constant difference overflow valve has through hole, and this through hole is with the oil suction chamber of constant difference overflow valve and go out oil pocket and be communicated with.
The spool 6 of described throttle valve is divided into oil suction chamber 7 and oil back chamber 8 with the valve pocket of described throttle valve, go out oil pocket 9 for diameter greater than this oil suction chamber, oil back chamber between the oil suction chamber 7 of described throttle valve and the oil back chamber 8, thereby at the oil suction chamber 7 of throttle valve and go out between the oil pocket 9, oil back chamber 8 and go out all to form valve port between the oil pocket 9, described filler opening 1 is communicated with the oil suction chamber 7 of described throttle valve, and described return opening 2 is communicated with the oil back chamber 8 of described throttle valve.
The spool 6 of described throttle valve has shoulder 10, and the diameter of described shoulder 10 equals the diameter of the oil back chamber 8 of described throttle valve, and its length is less than the length that goes out oil pocket 9 of described throttle valve.
The oil suction chamber 4 of described constant difference overflow valve is communicated with the oil suction chamber 7 and the oil back chamber 8 of described throttle valve respectively by pipeline; The oil pocket 5 that goes out of described constant difference overflow valve is communicated with the oil pocket 9 that goes out of described throttle valve, the oil pocket 9 that goes out of described throttle valve is communicated with external loading mouth 11, thereby having realized that the oil suction chamber 4 of constant difference overflow valve is communicated with filler opening 1, the oil pocket 5 that goes out of constant difference overflow valve is communicated with external loading mouth 11, is definite value with the pressure difference that guarantees filler opening and load port.
Pressure oil is entered by filler opening, and a part is final to reflux through return opening 2, and another part flows to external loading mouth 11, realizes the work of load port.
When the shoulder on the throttle valve spool 10 does not seal the oil back chamber 8 of throttle valve and goes out oil pocket 9 when not closing (oil back chamber and go out valve port between the oil pocket), the present invention is in the pressure control state, the oil back chamber 8 of throttle valve constitutes two adjustable resistance half-bridges of connecting with the valve port that goes out valve port and the oil suction chamber 7 between the oil pocket 9 and go out between the oil pocket 9, the stroke difference of throttle valve spool, the pressure of pressure oil output is also different, according to flow equation and flow equilibrium relation, can calculate the oil back chamber of throttle valve and go out valve port and the oil suction chamber between the oil pocket and go out the profilogram of the valve port between the oil pocket, to realize the linear change of pressure oil delivery pressure.When the oil back chamber 8 of the shoulder on the throttle valve spool 10 sealing throttle valve with when going out oil pocket 9 when closing (oil back chamber and go out valve port between the oil pocket), the present invention is in the pressure control state, and the Flow-rate adjustment principle of this moment is identical with general throttle valve: oil suction chamber 7 by the change throttle valve and the size (promptly changing size, the shape of throttle orifice) that goes out the valve port between the oil pocket 9 realize the adjusting of flow.
Constant difference overflow valve is a standard piece, only need get final product the processing of throttle valve partial design when manufacturing, and is easily manufactured.
Here, filler opening is communicated with the oil suction chamber of throttle valve, and return opening is communicated with the oil back chamber of throttle valve, and the oil pocket that goes out of throttle valve is communicated with the external loading mouth.Filler opening is communicated with the oil suction chamber of constant difference overflow valve, return opening is communicated with the oil suction chamber of constant difference overflow valve, the oil pocket that goes out of constant difference overflow valve is communicated with the external loading mouth, thereby the oil back chamber of realizing combination valve is communicated with return opening, the oil suction chamber of combination valve is communicated with filler opening, and the oil pocket that goes out of combination valve is communicated with the external loading mouth.
Claims (2)
1. direct-acting type pressure-flow combined valve, comprise constant difference overflow valve, the spool of described constant difference overflow valve is divided into the valve pocket of described constant difference overflow valve oil suction chamber and goes out oil pocket, the spool of described constant difference overflow valve has axial hole, described axial hole is communicated with the oil suction chamber of described constant difference overflow valve and goes out oil pocket, it is characterized in that:
Also comprise a throttle valve, the spool of described throttle valve is divided into oil suction chamber and oil back chamber with the valve pocket of described throttle valve, between the oil suction chamber of described throttle valve and the oil back chamber for diameter greater than the oil pocket that goes out of this oil suction chamber, oil back chamber, thereby at the oil suction chamber of throttle valve and go out between the oil pocket, oil back chamber and go out all to form valve port between the oil pocket;
The shared valve body of described constant difference overflow valve and described throttle valve, the oil suction chamber of described constant difference overflow valve is communicated with the oil suction chamber and the oil back chamber of described throttle valve respectively by pipeline, and the oil pocket that goes out of described constant difference overflow valve is communicated with the oil pocket that goes out of described throttle valve;
The oil suction chamber of described constant difference overflow valve and the oil back chamber of throttle valve have been formed the oil back chamber of combination valve, the oil suction chamber of described constant difference overflow valve and the oil suction chamber of throttle valve have been formed the oil suction chamber of combination valve, the oil pocket that goes out that oil pocket has been formed combination valve that goes out that goes out oil pocket and throttle valve of described constant difference overflow valve, the oil back chamber of described combination valve is communicated with return opening, the oil suction chamber of described combination valve is communicated with filler opening, and the oil pocket that goes out of described combination valve is communicated with the external loading mouth;
The spool of described throttle valve has shoulder, and the diameter of described shoulder equals the diameter of the oil back chamber of described throttle valve, and its length is less than the length that goes out oil pocket of described throttle valve.
2. direct-acting type pressure-flow combined valve as claimed in claim 1, it is characterized in that: described filler opening is communicated with the oil suction chamber of described throttle valve, described return opening is communicated with the oil back chamber of described throttle valve, and the oil pocket that goes out of described throttle valve is communicated with the external loading mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100491598A CN100360814C (en) | 2006-01-18 | 2006-01-18 | Direct-acting type pressure-flow combined valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100491598A CN100360814C (en) | 2006-01-18 | 2006-01-18 | Direct-acting type pressure-flow combined valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1800653A CN1800653A (en) | 2006-07-12 |
| CN100360814C true CN100360814C (en) | 2008-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100491598A Expired - Fee Related CN100360814C (en) | 2006-01-18 | 2006-01-18 | Direct-acting type pressure-flow combined valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100360814C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912534B (en) * | 2014-04-11 | 2016-12-07 | 柳州柳工液压件有限公司 | There is the constant difference overflow valve of unloading function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2289085Y (en) * | 1996-10-02 | 1998-08-26 | 浙江工业大学 | Digital small flow valve |
| US6186750B1 (en) * | 1999-04-27 | 2001-02-13 | Borgwarner, Inc. | Oil pump control valve spool with pilot pressure relief valve |
| JP2002021749A (en) * | 2000-07-11 | 2002-01-23 | Kayaba Ind Co Ltd | Flow pressure control valve for vane pump |
| CN1424514A (en) * | 2003-01-02 | 2003-06-18 | 宁波华液机器制造有限公司 | Differential pressure type proportional pressure and flow composite valve |
-
2006
- 2006-01-18 CN CNB2006100491598A patent/CN100360814C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2289085Y (en) * | 1996-10-02 | 1998-08-26 | 浙江工业大学 | Digital small flow valve |
| US6186750B1 (en) * | 1999-04-27 | 2001-02-13 | Borgwarner, Inc. | Oil pump control valve spool with pilot pressure relief valve |
| JP2002021749A (en) * | 2000-07-11 | 2002-01-23 | Kayaba Ind Co Ltd | Flow pressure control valve for vane pump |
| CN1424514A (en) * | 2003-01-02 | 2003-06-18 | 宁波华液机器制造有限公司 | Differential pressure type proportional pressure and flow composite valve |
Non-Patent Citations (3)
| Title |
|---|
| 2D数字式P-Q阀. 阮健等.液压气动与密封，第3期. 1999 * |
| P-Q复合阀调压静特性分析. 裴翔等.浙江工业大学学报，第29卷第3期. 2001 * |
| 新型数字式流量-压力复合阀. 阮健等.浙江工业大学学报，第27卷第2期. 1999 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1800653A (en) | 2006-07-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Hongwuhuan Machinery Co., Ltd. Assignor: Zhejiang University of Technology Contract fulfillment period: 2009.7.4 to 2014.7.3 contract change Contract record no.: 2009330001961 Denomination of invention: Direct-acting type pressure-flow combined valve Granted publication date: 20080109 License type: Exclusive license Record date: 2009.8.14 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.7.4 TO 2014.7.3; CHANGE OF CONTRACT Name of requester: ZHEJIANG HONGWUHUAN MACHINERY CO., LTD. Effective date: 20090814 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20130118 |