CN1424513A - Guided servo direction control valve - Google Patents
Guided servo direction control valve Download PDFInfo
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- CN1424513A CN1424513A CN 02160184 CN02160184A CN1424513A CN 1424513 A CN1424513 A CN 1424513A CN 02160184 CN02160184 CN 02160184 CN 02160184 A CN02160184 A CN 02160184A CN 1424513 A CN1424513 A CN 1424513A
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- main valve
- control
- circular
- valve body
- groove
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Abstract
A control valve of driving direction for guide servo consists of left end cover and right end cover, balance spring for control valve core, balance spring for main valve, main valve body, main valve core and control valve core. The left and right end covers will be fixed on the main valve body to form left and right control cavities together with the main valve body and there will be ring slot of oil channel, circular hole and oil channel connecting through to external in the main valve body. The control valve core will be set in the hole of main valve core as its two sleeves for raising shoulders to be corresponded to two circular ring slots on the main valve i.e symmetrical centre line for width of the circular ring slot to be coincided with symmetrical centre line for width of the sleeve for raising shoulder.
Description
(1) technical field
The present invention relates to a kind of valve, especially guide's servo-drive position control valve.
(2) background technique
At present, for high-pressure high-flow (more than 32 latus rectums) position control valve, Germany BOSCH-REXROTH (REXROTH) company, U.S.'s Parker (PARKER) company, Japanese oil grind some big hydraulic parts production companies such as (YUKEN) company and domestic some hydraulic parts production companies (see 1, " engineering machinery hydraulic product ", the sample HY02-8029/C of U.S. Parker company, in January, 2002; 2, " running mechanism hydraulic element ", German REXROTH company hydraulic product specification, XI volume; 3, " oil grinds hydraulic product ", Japanese YUKEN company nineteen ninety-five Chinese edition engineering information catalogue; 4, " multiple directional control valve and other valve " sample, the Changjiang river hydraulic parts factory) for overcome steering force big, realize difficulties such as proportional control and control far away, adopt by guide's decompression type Proportional valve more, the technology such as structure of control main valve are made up of left end cap, balance spring, valve body, main valve plug, right end cap and decompression type Proportional valve usually.Left end cap is fastened on the valve body, and sealing forms left control chamber between the valve body.There is a control port to connect the ratio pressure-reduction outlet of guide's decompression type Proportional valve and the neutral position of definite main valve on it.Right end cap is fastened on the valve body, and sealing forms right control chamber between the valve body.There is a control port to connect another ratio pressure-reduction outlet of guide's decompression type Proportional valve on it.Balance spring is contained on the main valve plug, and has certain precompressed amount.Valve inner has circular annular groove oil duct, circular hole reaches and the oil duct of exterior.Main valve plug is a circular cylindrical shape, has the circular ring slot of many different in width thereon, is contained in the circular hole of valve body to slide vertically.The annular groove oil duct of the circular ring slot on the main valve plug and annular half the circumference of the sleeve where it joins the shoulder and valve body constitutes the control relation of each oil circuit in the working connection.As main valve plug its flow of certain distance may command that moves to right.Guide's decompression type Proportional valve is independent assembly parts.It has a filler opening, a return opening and two control mouths, the pressure of the left and right control chamber of control left end cap, right end cap.Official post main valve plug by pressure at two ends produce axial force and relatively valve body slide, when sliding distance made counter-force that length of spring compressed produces and axial force balance, main valve plug just remained on this position.Just produce different axial forces if change the difference of pressure, thereby thereby main valve plug just can be controlled in the control relation that realizes each oil circuit in the working connection on the different positions.
Above-mentioned high-pressure high-flow position control valve is because Location accuracy and stability that the precision that the fluctuation of control-oil pressure like this, spring rate change and the power of surging all can influence main valve plug are determined in the position of main valve plug by the pressure reduction of control oil and the equilibrant of balance spring.Secondly, because the control mouth of proportion type reducing valve is connected oil circuit with the control mouth of the main valve left and right sides end cap certain distance is arranged, so the speed of response of main valve is lower.In addition because main valve and proportion type reducing valve are two independent parts, so that the system architecture complexity, leakage point is many, manufacture cost is high.Simultaneously, because the filler opening of proportion type reducing valve is the normal pressure mouth, so additional energy consumption is bigger.
(3) summary of the invention
The present invention aims to provide a kind of position control accuracy, speed of response and control stability height of realizing main valve plug, and system architecture is simple, and leakage point is few, guide's servo-drive position control valve that manufacture cost and additional energy consumption are low.
The present invention is provided with left end cap, control spool balance spring, main valve balance spring, main valve body, main valve plug, right end cap and control spool.Left end cap is fastened on the main valve body, forms left control chamber with main valve body, the circular hole that the side has is coaxial with the main valve body circular hole, diameter equates with the control valve core diameter, and the neutral position of definite main valve.Right end cap is fastened on the main valve body, forms right control chamber with main valve body, and the circular hole that the side has is coaxial with the main valve body circular hole, diameter equates with the control valve core diameter on circular hole and be provided with circular groove, has a hydraulic fluid port to connect control oil on it.Main valve body inside has circular annular groove oil duct, circular hole reaches and the oil duct of exterior.Main valve plug is a circular cylindrical shape, has the circular ring slot of different in width thereon, is contained in the circular hole of main valve body to slide vertically.The outer ring annular groove on the main valve plug and the annular groove oil duct of annular half the circumference of the sleeve where it joins the shoulder and main valve body constitute the control relation of each oil circuit in the working connection.Also have the hole one coaxial, that diameter equates with the control valve core diameter in addition on the main valve plug, have two circular ring slots between the hole, there is the oilhole of a left control chamber of connection and left side annular groove in the main valve plug left side, and there is the oilhole of a right control chamber of connection and the right annular groove on the right side.The diameter of control spool equates that with the main valve plug diameter of bore left side is played three annular rounded groove and produced two annular half the circumference of the sleeve where it joins the shoulders, and rightmost annular rounded groove is the distribution oil ring groove.Play first and third on a left side, have oilhole between the groove of Fourth Ring, have on the control spool that a coaxial aperture makes that a left side plays first and third, oilhole is communicated with between the groove of Fourth Ring.The control spool is contained in the main valve plug hole, and two half the circumference of the sleeve where it joins the shoulders are corresponding with two circular ring slots on the main valve plug to be that circular ring slot width symmetrical center line overlaps with half the circumference of the sleeve where it joins the shoulder width symmetrical center line.The half the circumference of the sleeve where it joins the shoulder width can be less than or equal to the circular ring slot width.The two ends of control spool cooperate with the hole of left and right sides end cap, and the distribution oil ring groove is corresponding with circular groove between the right end cap circular hole.
Equal circular ring slot width (zero lap control) as the half the circumference of the sleeve where it joins the shoulder width, when the opening 1,2,3,4 of control spool is 0 o'clock, it is static that the main valve plug stress balance keeps.If will control spool moves to left, then opening 2,4 is opened, and control oil enters right control chamber by opening 4, and left control chamber oil flows into return opening (T mouth) by opening 2, makes main valve plug overcome load and moves to left.The moving to left and opening 2,4 is reduced of main valve plug, main valve plug stops to move when opening 2,4 is closed, and remains on the new control position, thereby realizes function control to working connection filler opening (P mouth), control mouthful (A mouth, a B mouth), return opening (T mouth).If the control spool continues to move to left, opening 2,4 continues to open makes main valve plug also continue to move to left, and has so also just realized the position servo control to main valve plug.
Less than circular ring slot width (positive opening control), when the opening 1,2,3,4 of control spool equated the oily pressure at left and right sides control chamber of control, it is static that the main valve plug stress balance keeps as the half the circumference of the sleeve where it joins the shoulder width.If will control spool moves to left, then opening 1,3 reduces, and opening 2,4 increases control oil and enters right control chamber by opening 4, and left control chamber oil flows into the T mouth by opening 2, makes main valve plug overcome load and moves to left.The moving to left and opening 1,3 is increased of main valve plug, opening 2,4 reduces.When opening 1,2,3,4 when making main valve plug left and right sides control chamber pressure reach suffered hydraulic coupling of main valve plug and load balance, and main valve plug stops to move, and remains on the new control position, thereby realize working connection P, A, B, the function control of T mouth.If the control spool continues to move to left, main valve plug also continues to move to left, and has so also just realized the position servo control to main valve plug.Control oil can enter the coaxial aperture of control spool all the time by circular groove on the right end cap hole and the distribution oil ring groove on the control spool in whole shift motion.
Compare with existing control valve, because the position of main valve plug is mainly directly controlled by the position of control spool, control spool and main valve plug constitute closed loop control system, fluctuation, the stiffness variation precision of spring and the power of surging of the pressure of control oil are very little to the Location accuracy and the stability influence of main valve, therefore can realize the Accurate Position Control of main valve plug.Secondly, because main valve plug is directly realized position servo control by the control spool, therefore can realize the speed of response that main valve plug is very high.In addition, the control spool is integrated in the main valve plug, has only a control port, and institute is so that system architecture is simple, leakage point is few, low cost of manufacture.Simultaneously, as adopt positive opening control, realize the integrated of system, control oil keeps low-pressure state in off working state, has reduced additional energy consumption.
(4) description of drawings
Fig. 1 is the structure principle chart of the embodiment of the invention.
(5) embodiment
As shown in Figure 1, the present invention controls spools 7 by left end cap 1, control spool balance spring 2, main valve balance spring 3, main valve body 4, main valve plug 5, right end cap 6 and forms.Left end cap 1 is fastened on the main valve body 4, and sealing forms left control chamber 8 between the main valve body 4.That the side has is coaxial with the main valve body circular hole, the circular hole of diameter and control spool 7 equal diameters, and the neutral position of definite main valve.Right end cap 6 is fastened on the valve body, and sealing forms right control chamber 9 between the valve body 4.That the side has is coaxial with the main valve body circular hole, the circular hole of diameter and control spool 7 equal diameters, on circular hole and have the circular groove of certain width, has a hydraulic fluid port to connect control oil on it.Main valve body 4 inside have circular annular groove oil duct, circular hole reaches and the oil duct of exterior.Main valve plug 5 is a circular cylindrical shape, has the circular ring slot of many different in width thereon, is contained in the circular hole of main valve body 4 to slide vertically.The annular groove oil duct of outer ring annular groove on the main valve plug 5 and annular half the circumference of the sleeve where it joins the shoulder and main valve body 4 constitutes the control relation of each oil circuit in the working connection.Moving to right as main valve plug, certain distance may command P mouth and B mouth are connected, the A mouth is with the connection of T mouth and control its flow.The hole that also has one coaxial, diameter and control spool 7 equal diameters in addition on the main valve plug 5.Have the circular ring slot of two certain widths between the hole, there is the oilhole of a left control chamber of connection and left side annular groove in the main valve plug left side, and there is the oilhole of a right control chamber of connection and the right annular groove on the right side.Control spool 7 its diameters equate that with main valve plug 5 diameter of bores a left side is played three annular rounded groove and produced two annular half the circumference of the sleeve where it joins the shoulders, and rightmost annular rounded groove is the distribution oil ring groove.Play first and third on a left side, have oilhole between the groove of Fourth Ring, have on the control spool that a coaxial aperture makes that a left side plays first and third, oilhole is communicated with between the groove of Fourth Ring.Control spool 7 is contained in the main valve plug hole, and the circular ring slot of two certain widths on two half the circumference of the sleeve where it joins the shoulders and the main valve plug is corresponding to be that circular ring slot width symmetrical center line overlaps with half the circumference of the sleeve where it joins the shoulder width symmetrical center line.The half the circumference of the sleeve where it joins the shoulder width can be less than or equal to the circular ring slot width.The two ends of control spool 7 cooperate with the hole of left and right sides end cap, and the distribution oil ring groove is corresponding with circular groove between right end cap 6 circular holes.
Equal circular ring slot width (zero lap control) as the half the circumference of the sleeve where it joins the shoulder width, when the control spool is in shown position, the opening 1,2,3,4 of control spool is 0, thereby makes the main valve plug stress balance keep static.If will control spool moves to left, then opening 2,4 is opened, and control oil enters right control chamber by opening 4, and left control chamber oil flows into the T mouth by opening 2, makes main valve plug overcome load and moves to left.The moving to left and opening 2,4 is reduced of main valve plug, main valve plug stops to move when opening 2,4 is closed, and remains on the new control position, thereby realizes working connection P, A, B, the function control of T mouth.If the control spool continues to move to left, opening 2,4 continues to open makes main valve plug also continue to move to left, and has so also just realized the position servo control to main valve plug.
Less than circular ring slot width (positive opening control), when the control spool was in shown position, the opening 1,2,3,4 of control spool made control oil equate at the pressure of left and right sides control chamber, thereby made the main valve plug stress balance keep static as the half the circumference of the sleeve where it joins the shoulder width.If will control spool moves to left, then opening 1,3 reduces, and opening 2,4 increases control oil and enters right control chamber by opening 4, and left control chamber oil flows into the T mouth by opening 2, makes main valve plug overcome load and moves to left.The moving to left and opening 1,3 is increased of main valve plug, opening 2,4 reduces.When opening 1,2,3,4 when making main valve plug left and right sides control chamber pressure reach suffered hydraulic coupling of main valve plug and load balance, and main valve plug stops to move, and remains on the new control position, thereby realize working connection P, A, B, the function control of T mouth.If the control spool continues to move to left, main valve plug also continues to move to left, and has so also just realized the position servo control to main valve plug.Control oil can enter the coaxial aperture of control spool all the time by circular groove on right end cap 6 holes and the distribution oil ring groove on the control spool 7 in whole shift motion.
Claims (4)
1, guide's servo-drive position control valve is characterized in that being provided with left end cap, control spool balance spring, main valve balance spring, main valve body, main valve plug, right end cap and control spool; Left end cap is fastened on the main valve body, forms left control chamber with main valve body, the circular hole that the side has is coaxial with the main valve body circular hole, diameter equates with the control valve core diameter, and the neutral position of definite main valve; Right end cap is fastened on the main valve body, forms right control chamber with main valve body, and the circular hole that the side has is coaxial with the main valve body circular hole, diameter equates with the control valve core diameter on circular hole and be provided with circular groove, has a hydraulic fluid port to connect control oil on it; Main valve body inside has circular annular groove oil duct, circular hole reaches and the oil duct of exterior; Main valve plug is a circular cylindrical shape, have the circular ring slot of different in width thereon, be contained in the circular hole of main valve body and can slide vertically, the outer ring annular groove on the main valve plug and the annular groove oil duct of annular half the circumference of the sleeve where it joins the shoulder and main valve body constitute the control relation of each oil circuit in the working connection, be provided with the hole one coaxial, that diameter equates with the control valve core diameter on the main valve plug in addition, have two circular ring slots between the hole, there is the oilhole of a left control chamber of connection and left side annular groove in the main valve plug left side, and there is the oilhole of a right control chamber of connection and bad groove of the right on the right side; The diameter of control spool equates with the main valve plug diameter of bore, a left side is played three annular rounded groove and has been produced two annular half the circumference of the sleeve where it joins the shoulders, rightmost annular rounded groove is the distribution oil ring groove, play first and third on a left side, have oilhole between the groove of Fourth Ring, have in control that a coaxial aperture makes that a left side plays first and third on the spool, oilhole is communicated with between the groove of Fourth Ring, the control spool is contained in the main valve plug hole, and two half the circumference of the sleeve where it joins the shoulders are corresponding with two circular ring slots on the main valve plug to be that circular ring slot width symmetrical center line overlaps with half the circumference of the sleeve where it joins the shoulder width symmetrical center line.
2, guide's servo-drive position control valve as claimed in claim 1 is characterized in that said half the circumference of the sleeve where it joins the shoulder width equals the circular ring slot width.
3, guide's servo-drive position control valve as claimed in claim 1 is characterized in that said half the circumference of the sleeve where it joins the shoulder width is less than the circular ring slot width.
4, guide's servo-drive position control valve as claimed in claim 1 is characterized in that the two ends of controlling spool cooperate with the hole of left and right sides end cap, and the distribution oil ring groove is corresponding with circular groove between the right end cap circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021601844A CN1186537C (en) | 2002-12-26 | 2002-12-26 | Guided servo direction control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021601844A CN1186537C (en) | 2002-12-26 | 2002-12-26 | Guided servo direction control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1424513A true CN1424513A (en) | 2003-06-18 |
| CN1186537C CN1186537C (en) | 2005-01-26 |
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ID=4753411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021601844A Expired - Fee Related CN1186537C (en) | 2002-12-26 | 2002-12-26 | Guided servo direction control valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN1186537C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526207A (en) * | 2016-01-28 | 2016-04-27 | 山河智能装备股份有限公司 | Distributing valve for hydraulic rock drill and distributing control system applied to hydraulic rock drill |
| CN105545856A (en) * | 2016-02-17 | 2016-05-04 | 武汉市航天汉诺优科技有限公司 | Numerical control rotary core type proportional servo valve |
| CN108916400A (en) * | 2018-07-17 | 2018-11-30 | 湖北仁创科技有限公司 | A kind of water hydraulic hydraulic-controlled switch valve suitable for especially big flow control |
-
2002
- 2002-12-26 CN CNB021601844A patent/CN1186537C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526207A (en) * | 2016-01-28 | 2016-04-27 | 山河智能装备股份有限公司 | Distributing valve for hydraulic rock drill and distributing control system applied to hydraulic rock drill |
| CN105545856A (en) * | 2016-02-17 | 2016-05-04 | 武汉市航天汉诺优科技有限公司 | Numerical control rotary core type proportional servo valve |
| CN105545856B (en) * | 2016-02-17 | 2017-07-14 | 武汉市汉诺优电控有限责任公司 | Core type proportional servo valve is revolved in a kind of numerical control |
| CN108916400A (en) * | 2018-07-17 | 2018-11-30 | 湖北仁创科技有限公司 | A kind of water hydraulic hydraulic-controlled switch valve suitable for especially big flow control |
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| Publication number | Publication date |
|---|---|
| CN1186537C (en) | 2005-01-26 |
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Granted publication date: 20050126 Termination date: 20101226 |