CN201427169Y - Proportional relief circuit of high-speed forging hydraulic press - Google Patents
Proportional relief circuit of high-speed forging hydraulic press Download PDFInfo
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- CN201427169Y CN201427169Y CN2009200152136U CN200920015213U CN201427169Y CN 201427169 Y CN201427169 Y CN 201427169Y CN 2009200152136 U CN2009200152136 U CN 2009200152136U CN 200920015213 U CN200920015213 U CN 200920015213U CN 201427169 Y CN201427169 Y CN 201427169Y
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- relief valve
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Abstract
The utility model relates to the proportional relief circuit of the hydraulic system of a high-speed forging hydraulic press used in the metal free forging industry, which is formed by a proportionalpilot valve, a throttle valve, a primary relief valve, a one-way throttle valve and a master oil drain valve. The proportional pilot valve controls the relief valve to relieve the pressure stably andis connected with the throttle valve. The throttle valve is connected with the primary relief valve. The primary relief valve is connected with the one-way throttle valve. The one-way throttle valve is connected with the master oil drain valve used for relief. In a valve control system, the proportional pilot valve is used to control the relief valve to relieve pressure stably and the master oil drain valve is open after the pressure of an oil cylinder is decreased so as to realize the relief of a master cylinder; and the openness of the primary relief valve is controlled according to the input circuit curve of a program so as to enable that the relief valve can be opened according to a certain proportional curve, thereby realizing that the relief valve can relieve the pressure stably. Thedevice satisfies the requirement on the large-flow and large-drift-diameter pressure relief of the large-diameter oil cylinder of the high-speed forging hydraulic press driven by oil. The proportional relief circuit adopts a domestic master valve and the proportional pilot valve imported from abroad. Thereby, the proportional control of the relief is realized so that the entire relief process isstable and free of impact. The proportional pilot valve substitutes for a hydraulic control secondary relief valve and thereby the circuit is simplified.
Description
Technical field:
The utility model relates in the metal flat-die forging industry a kind of proportion pilot off-load The Application of Technology in the high speed forging hydraulic press hydraulic system.
Background technology:
Forging hydraulic press is a kind of novel forging equipment that the sixties, developed country grew up, and is the developing direction of flat-die forging equipment.Because the higher forging frequency of forging hydraulic press, hydraulic system will solve forging hydraulic press when high frequency time forges, each working cycles will steadily commutate, do not have and impact, make the fluid pressure line vibration little, noise is little, press motion is steady, the repetitive positioning accuracy height makes press reach the good work condition state of rapid forge technology, satisfies the requirement of production technology.The forging hydraulic press hydraulic system is divided into pump control system and valve control system.Extensively adopt valve control system at present, it is to forge valve soon with the integrated form ratio to realize steady release, and system is operated steadily does not have impact.Domestic forging hydraulic press is to begin one's study the end of the nineties, and research and development and production just were in full swing up to 2004.In hydraulic system, the method that solves quick relief has two kinds: the one, and select for use inlet header accepted way of doing sth ratio to forge valve soon, but cost an arm and a leg; Another kind is to adopt two-stage unloading loop (Fig. 2), and it is made up of guide's ball valve 1, one-level pressure-relief valve 2, hydraulic control secondary pressure-relief valve 3 and main draining valve 4.Guide's ball valve commutation during the master cylinder off-load, the one-level pressure-relief valve is opened release, because reducing of master cylinder pressure opened hydraulic control secondary pressure-relief valve master cylinder pressure is further reduced, master's draining valve could be opened oil extraction when master cylinder pressure drops to less pressure, reaches the release purpose.Because the pilot valve of this relief circuit is a switch valve, flow is uncontrollable, and making has impact phenomenon in the stress-relief process, and the press operation is not steady.Therefore developing a kind of high speed forging hydraulic press with the ratio relief circuit is the new problem of being badly in need of solution.
The utility model content:
The purpose of this utility model provides quick and stable off-load in a kind of solution forging hydraulic press hydraulic system, the product that cost performance is high, alternative integrated form ratio is forged valve soon, this relief circuit is a flow of controlling pressure-relief valve by the proportion control of Comparative Examples pilot valve, realizes the steady off-load of main valve by the changes in flow rate of pressure-relief valve.
The purpose of this utility model is achieved in that the ratio relief circuit of high speed forging hydraulic press hydraulic system, it is made up of proportional pilot valve, choke valve, one-level pressure-relief valve, one-way throttle valve and main draining valve, the proportional pilot valve of the steady release of control pressure-relief valve is connected with choke valve, choke valve is connected with the one-level pressure-relief valve, the one-level pressure-relief valve is connected with one-way throttle valve, and one-way throttle valve is connected with the main draining valve that is used for off-load.
Main points of the present utility model are its structure and operation principle.Its operation principle and method of operating are: in valve control system, with the steady release of proportional pilot valve control pressure-relief valve, after oil cylinder working-pressure descended, main draining valve was opened, and realized the master cylinder off-load; This relief circuit is a flow of controlling pressure-relief valve by the proportion control of Comparative Examples pilot valve, realize the off-load of main draining valve by the changes in flow rate of pressure-relief valve, during the master cylinder release, the open amount of the arrival current curve control one-level pressure-relief valve of follow procedure, make pressure-relief valve curve unlatching by a certain percentage, realize the steady release of pressure-relief valve, arrival current curve can be adjusted according to field working conditions, when main draining valve upper cavity pressure drops to a convenient pressure, open, carry out the big flow oil extraction of master cylinder.
Ratio relief circuit in the high speed forging hydraulic press compared with prior art, have and satisfy of the release of oily transmission forging hydraulic press than the big latus rectum of big flow of major diameter oil cylinder, domestic main valve and external proportional pilot valve are adopted in the ratio relief circuit, not only reduce cost but also realized the proportion control of release, make whole stress-relief process steadily not have impact, proportional pilot valve has replaced hydraulic control secondary pressure-relief valve, has simplified advantages such as loop, will be widely used in the metal flat-die forging industry.
Description of drawings:
Below in conjunction with accompanying drawing and example the utility model is elaborated.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is secondary drain charge loop.
The specific embodiment:
With reference to accompanying drawing, a kind of ratio relief circuit of high speed forging hydraulic press hydraulic system, it is made up of proportional pilot valve 1, choke valve 2, one-level pressure-relief valve 3, one-way throttle valve 4 and main draining valve 5, the proportional pilot valve 1 of the steady release of control pressure-relief valve is connected with choke valve 2, choke valve 2 is connected with one-level pressure-relief valve 3, one-level pressure-relief valve 3 is connected with one-way throttle valve 4, and one-way throttle valve 4 is connected with the main draining valve 5 that is used for off-load.In valve control system, with the steady release of proportional pilot valve 1 control pressure-relief valve, after oil cylinder working-pressure descended, main draining valve 5 was opened, and realizes the master cylinder off-load; This relief circuit is a flow of controlling pressure-relief valve by the proportion control of Comparative Examples pilot valve 1, realize the off-load of main draining valve 5 by the changes in flow rate of pressure-relief valve, during the master cylinder release, the open amount of the arrival current curve control one-level pressure-relief valve 3 of follow procedure, make pressure-relief valve curve unlatching by a certain percentage, realize the steady release of pressure-relief valve, arrival current curve can be adjusted according to field working conditions, when main draining valve 5 upper cavity pressures drop to a convenient pressure, open, carry out the big flow oil extraction of master cylinder.
Claims (1)
1, a kind of ratio relief circuit of high speed forging hydraulic press hydraulic system, it is made up of proportional pilot valve, choke valve, one-level pressure-relief valve, one-way throttle valve and main draining valve, it is characterized in that: the proportional pilot valve of the steady release of control pressure-relief valve is connected with choke valve, choke valve is connected with the one-level pressure-relief valve, the one-level pressure-relief valve is connected with one-way throttle valve, and one-way throttle valve is connected with the main draining valve that is used for off-load.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN2009200152136U CN201427169Y (en) | 2009-07-10 | 2009-07-10 | Proportional relief circuit of high-speed forging hydraulic press |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN2009200152136U CN201427169Y (en) | 2009-07-10 | 2009-07-10 | Proportional relief circuit of high-speed forging hydraulic press |
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CN201427169Y true CN201427169Y (en) | 2010-03-24 |
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CN2009200152136U Expired - Fee Related CN201427169Y (en) | 2009-07-10 | 2009-07-10 | Proportional relief circuit of high-speed forging hydraulic press |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102114517A (en) * | 2010-11-30 | 2011-07-06 | 浙江大学 | Displacement-force compound control lifting system for forging manipulator |
CN102182715A (en) * | 2011-05-20 | 2011-09-14 | 长沙中联重工科技发展股份有限公司 | Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system |
CN104588555A (en) * | 2014-11-26 | 2015-05-06 | 北方重工集团有限公司 | Horizontal buffering hydraulic circuit for large forging manipulator |
CN106141055A (en) * | 2016-08-26 | 2016-11-23 | 安徽安簧机械股份有限公司 | A kind of C-frame hydraulic press servosystem being applicable to forging |
CN112343884A (en) * | 2020-11-05 | 2021-02-09 | 北京航天发射技术研究所 | Two-stage pilot-controlled high-speed large-flow switch valve and method |
-
2009
- 2009-07-10 CN CN2009200152136U patent/CN201427169Y/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102114517A (en) * | 2010-11-30 | 2011-07-06 | 浙江大学 | Displacement-force compound control lifting system for forging manipulator |
CN102114517B (en) * | 2010-11-30 | 2012-11-07 | 浙江大学 | Displacement-force compound control lifting system for forging manipulator |
CN102182715A (en) * | 2011-05-20 | 2011-09-14 | 长沙中联重工科技发展股份有限公司 | Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system |
CN102182715B (en) * | 2011-05-20 | 2012-11-14 | 中联重科股份有限公司 | Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system |
WO2012159374A1 (en) * | 2011-05-20 | 2012-11-29 | 长沙中联重工科技发展股份有限公司 | Hydraulic control system and hydraulic control module thereof and engineering machine having the system |
CN104588555A (en) * | 2014-11-26 | 2015-05-06 | 北方重工集团有限公司 | Horizontal buffering hydraulic circuit for large forging manipulator |
CN104588555B (en) * | 2014-11-26 | 2017-04-05 | 北方重工集团有限公司 | A kind of large-sized forging operates the horizontal buffering hydraulic loop of machine |
CN106141055A (en) * | 2016-08-26 | 2016-11-23 | 安徽安簧机械股份有限公司 | A kind of C-frame hydraulic press servosystem being applicable to forging |
CN106141055B (en) * | 2016-08-26 | 2017-11-03 | 安徽安簧机械股份有限公司 | A kind of C-frame hydraulic press servo-drive system for being applied to forging |
CN112343884A (en) * | 2020-11-05 | 2021-02-09 | 北京航天发射技术研究所 | Two-stage pilot-controlled high-speed large-flow switch valve and method |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20120710 |