CN102836942A - High-response hydraulic synchronizing circuit for compensating dead zone of hydraulic valve - Google Patents
High-response hydraulic synchronizing circuit for compensating dead zone of hydraulic valve Download PDFInfo
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- CN102836942A CN102836942A CN2012103578391A CN201210357839A CN102836942A CN 102836942 A CN102836942 A CN 102836942A CN 2012103578391 A CN2012103578391 A CN 2012103578391A CN 201210357839 A CN201210357839 A CN 201210357839A CN 102836942 A CN102836942 A CN 102836942A
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Abstract
The invention discloses a high-response hydraulic synchronizing circuit for compensating a dead zone of a hydraulic valve. The high-response hydraulic synchronizing circuit comprises an oil tank (26), a left synchronous hydraulic cylinder (14) and a right synchronous hydraulic cylinder (15), wherein the inlet of a hydraulic pump is connected with the oil tank (26); the outlet of the hydraulic pump is connected with a second fine filter (4) and a second one-way valve (5) and is respectively communicated with oil chambers of the left synchronous hydraulic cylinder (14) and the right synchronous hydraulic cylinder (15) through two two-position two-way high-speed switch valves (7 and 8) or two low-flow proportional flow valves. If necessary, the corresponding high-speed switch valves are started by starting a high-pressure low-flow pump, and then an execution element with a requirement of fuel replenishment can be supplied by fuel oil, thereby compensating the dead zone of the hydraulic valve. As a result, the response speed is probably improved, and the dynamic balance precision is improved. The invention provides a method capable of compensating on the dead zone of the hydraulic valve, particularly compensating a main valve in a synchronous balance hydraulic circuit of a megaton hydraulic press, thereby improving the response speed and the synchronizing speed of the system.
Description
Technical field
The present invention relates to the method that a kind of dead band that is used for height response Hydraulic Synchronizing return valve compensates, particularly relate to the ton hydraulic press synchronous balancing hydraulic circuit.
Background technology
Giant stamp forging hydraulic press when work, moved cross beam under the influence that receives eccentric moment with run-off the straight.When if the moved cross beam angle of deviation surpasses the scope that allows, the work at once of correction major loop, but, limited response speed at once because the influence in valve dead band can not carried out fluid infusion to working cylinder.Since receive the influence in hydraulic valve dead band, the particularly existing ton hydraulic press synchronous balancing hydraulic circuit in Hydraulic Synchronizing loop, and its response speed has received certain limitation, has restricted the raising of synchronization accuracy.The dead band is the intrinsic characteristic of hydraulic valve, can only compensate by externalist methodology.
Summary of the invention
Thereby technical problem to be solved by this invention provides a kind of height response Hydraulic Synchronizing loop that the hydraulic valve dead band is compensated that can compensate the response speed that improves system and synchronization accuracy to the hydraulic valve dead band.
In order to solve the above problem; The height that the hydraulic valve dead band is compensated that the present invention adopts responds the Hydraulic Synchronizing loop; Comprise fuel tank, left synchronous hydraulic cylinder and right synchronous hydraulic cylinder (15); The inlet of hydraulic pump is connected with described fuel tank, and described hydraulic pressure delivery side of pump connects second fine filter, second check valve also is communicated with the oil pocket of described left synchronous hydraulic cylinder and right synchronous hydraulic cylinder respectively through the proportional flow control valve of two bi-bit bi-pass high-speed switch valves or two low discharges.
Described hydraulic pump is the high-pressure low-flow variable pump.
The control of two described bi-bit bi-pass high-speed switch valves is directly controlled through industrial computer.
Adopting the height that the hydraulic valve dead band is compensated of technique scheme to respond the Hydraulic Synchronizing loop, is on the basis of intrinsic ton hydraulic press synchronous balancing hydraulic circuit, to increase the dead area compensation loop.When if the moved cross beam angle of deviation surpasses the scope that allows; The work at once of correction major loop in time shifts to an earlier date hydraulic pump, opens the proportional flow control valve of corresponding two bi-bit bi-pass high-speed switch valves or two low discharges; Working cylinder to needing fluid infusion carries out fuel feeding earlier; Reach the hydraulic valve dead area compensation, thereby improve response speed most probably, improve the dynamic equilibrium precision.The control of two bi-bit bi-pass high-speed switch valves is directly controlled through industrial computer, realizes the digital control of hydraulic circuit.
In sum, the present invention is the method that a kind of ability realization compensates, particularly the main valve in the ton hydraulic press synchronous balancing hydraulic circuit compensated the hydraulic valve dead band, thereby improves the response speed and the synchronization accuracy of system.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Referring to Fig. 1; The height that the hydraulic valve dead band is compensated responds the Hydraulic Synchronizing loop; Comprise proportional pressure control valve 3, first fine filter 6, first check valve 9, first proportional velocity regulating valve 10, second proportional velocity regulating valve 21, first inserted valve 11, second inserted valve 18, first two-position three way magnetic valve 12, second two-position three way magnetic valve 16, first hydraulic control one-way valve 13, second hydraulic control one-way valve 17, the left synchronous hydraulic cylinder 14 of high-capacity pump 2, band safety valve, right synchronous hydraulic cylinder 15, first two-position two-way solenoid valve 19, second two-position two-way solenoid valve 20, the 3rd two-position two-way solenoid valve 24, Pressure gauge 22, pilot operated compound relief valve 23, overflow valve 25 and fuel tank 26; The inlet of high-pressure low-flow variable pump 1 is connected with fuel tank 26; The outlet of high-pressure low-flow variable pump 1 connects second fine filter 4 and second check valve 5; The outlet of second check valve 5 is connected with the inlet of the first bi-bit bi-pass high-speed switch valve 7 and the second bi-bit bi-pass high-speed switch valve 8; On the lower end that the outlet of the first bi-bit bi-pass high-speed switch valve 7 is connected in left synchronous hydraulic cylinder 14 and the oil circuit that the upper end of right synchronous hydraulic cylinder 15 links to each other; The outlet of the second bi-bit bi-pass high-speed switch valve 8 is connected on the oil circuit of lower ends of upper end and right synchronous hydraulic cylinder 15 of left synchronous hydraulic cylinder 14, and the control of the first bi-bit bi-pass high-speed switch valve 7 and the second bi-bit bi-pass high-speed switch valve 8 is directly controlled through industrial computer.
The first bi-bit bi-pass high-speed switch valve 7 and the second bi-bit bi-pass high-speed switch valve 8 also can adopt the proportional flow control valve of two low discharges to divide replacement.
Referring to Fig. 1, giant stamp forging hydraulic press when work, moved cross beam under the influence that receives eccentric moment with run-off the straight.When if the moved cross beam angle of deviation surpasses the scope that allows, the work at once of correction major loop, but, limited response speed at once because the influence in valve dead band can not carried out fluid infusion to working cylinder.At this moment; In time start high-pressure low-flow variable pump 1 in advance; Open the corresponding first bi-bit bi-pass high-speed switch valve 7 or the second bi-bit bi-pass high-speed switch valve 8, the working cylinder that needs fluid infusion is carried out fuel feeding earlier, reach the hydraulic valve dead area compensation; Thereby improve response speed most probably, improve the dynamic equilibrium precision.
If during deflection that moved cross beam is counterclockwise, the hydraulic oil of correction major loop is provided by high-capacity pump 2, gets into the lower end of left synchronous hydraulic cylinder 14 and the upper end of right synchronous hydraulic cylinder 15 through first proportional velocity regulating valve 10 through first inserted valve 11, and it is rectified a deviation.But owing to receive the influence in hydraulic valve dead band, major loop can not provide hydraulic oil to synchronous hydraulic cylinder at once.At this moment, high-pressure low-flow variable pump 1 starts, and the first bi-bit bi-pass high-speed switch valve 7 is opened, and gets into the lower end of left synchronous hydraulic cylinder 14 and the upper end of right synchronous hydraulic cylinder 15 through the A point, and the working cylinder that needs fluid infusion is carried out fuel feeding, reaches the hydraulic valve dead area compensation.
This loop also can assist major loop to carry out fluid infusion in needs simultaneously, further improves response speed.
Claims (3)
1. the height that the hydraulic valve dead band is compensated responds the Hydraulic Synchronizing loop; Comprise fuel tank (26), left synchronous hydraulic cylinder (14) and right synchronous hydraulic cylinder (15); It is characterized in that: the inlet of hydraulic pump is connected with described fuel tank (26), and described hydraulic pressure delivery side of pump connects second fine filter (4), second check valve (5) also is communicated with the oil pocket of described left synchronous hydraulic cylinder (14) and right synchronous hydraulic cylinder (15) respectively through the proportional flow control valve of two bi-bit bi-pass high-speed switch valves (7,8) or two low discharges.
2. the height response Hydraulic Synchronizing loop that the hydraulic valve dead band is compensated according to claim 1, it is characterized in that: described hydraulic pump is high-pressure low-flow variable pump (1).
3. the height response Hydraulic Synchronizing loop that the hydraulic valve dead band is compensated according to claim 1 and 2, it is characterized in that: the control of two described bi-bit bi-pass high-speed switch valves (7,8) is directly controlled through industrial computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103578391A CN102836942A (en) | 2012-09-24 | 2012-09-24 | High-response hydraulic synchronizing circuit for compensating dead zone of hydraulic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103578391A CN102836942A (en) | 2012-09-24 | 2012-09-24 | High-response hydraulic synchronizing circuit for compensating dead zone of hydraulic valve |
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| CN102836942A true CN102836942A (en) | 2012-12-26 |
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| CN2012103578391A Pending CN102836942A (en) | 2012-09-24 | 2012-09-24 | High-response hydraulic synchronizing circuit for compensating dead zone of hydraulic valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763698A (en) * | 2014-01-08 | 2015-07-08 | 佛山市恒力泰机械有限公司 | Automatic adjusting method for valve element zero position of moving beam proportional valve of ceramic brick machine |
| CN106828112A (en) * | 2016-12-23 | 2017-06-13 | 中南大学 | A kind of pantograph rising bow air bag switch valve controlling dead error automatic detection, compensation method and system |
| CN109248981A (en) * | 2018-10-16 | 2019-01-22 | 南京迪威尔高端制造股份有限公司 | Accumulator flow and Pressure behaviour compensation control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2041185A1 (en) * | 1970-08-19 | 1972-02-24 | Stuebbe Gmbh Maschf | Plastics processing machine, in particular injection molding machine or blow molding machine, with hydraulically synchronized hydraulic cylinders |
| JP2000015499A (en) * | 1998-07-03 | 2000-01-18 | Aida Eng Ltd | Slide drive method and its device |
| CN1903476A (en) * | 2005-07-28 | 2007-01-31 | 中南大学 | Compensation synchronous balancing control system for large die forging hydraupress |
| CN101135326A (en) * | 2007-09-26 | 2008-03-05 | 中南大学 | Giant-scale hydraulic press synchronous balancing hydraulic circuit |
| CN101537469A (en) * | 2009-04-15 | 2009-09-23 | 中南大学 | High-precision synchronizing device for forging moving beam of hydraulic press |
-
2012
- 2012-09-24 CN CN2012103578391A patent/CN102836942A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2041185A1 (en) * | 1970-08-19 | 1972-02-24 | Stuebbe Gmbh Maschf | Plastics processing machine, in particular injection molding machine or blow molding machine, with hydraulically synchronized hydraulic cylinders |
| JP2000015499A (en) * | 1998-07-03 | 2000-01-18 | Aida Eng Ltd | Slide drive method and its device |
| CN1903476A (en) * | 2005-07-28 | 2007-01-31 | 中南大学 | Compensation synchronous balancing control system for large die forging hydraupress |
| CN101135326A (en) * | 2007-09-26 | 2008-03-05 | 中南大学 | Giant-scale hydraulic press synchronous balancing hydraulic circuit |
| CN101537469A (en) * | 2009-04-15 | 2009-09-23 | 中南大学 | High-precision synchronizing device for forging moving beam of hydraulic press |
Non-Patent Citations (1)
| Title |
|---|
| 胡开平: "《大型模锻液压机活动横梁同步平衡系统的改造》", 《重型机械》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763698A (en) * | 2014-01-08 | 2015-07-08 | 佛山市恒力泰机械有限公司 | Automatic adjusting method for valve element zero position of moving beam proportional valve of ceramic brick machine |
| CN106828112A (en) * | 2016-12-23 | 2017-06-13 | 中南大学 | A kind of pantograph rising bow air bag switch valve controlling dead error automatic detection, compensation method and system |
| CN109248981A (en) * | 2018-10-16 | 2019-01-22 | 南京迪威尔高端制造股份有限公司 | Accumulator flow and Pressure behaviour compensation control system |
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Application publication date: 20121226 |