CN104006019B - Can the Ioad-sensing control valve of remote adjustment pressure reduction - Google Patents
Can the Ioad-sensing control valve of remote adjustment pressure reduction Download PDFInfo
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- CN104006019B CN104006019B CN201410207173.0A CN201410207173A CN104006019B CN 104006019 B CN104006019 B CN 104006019B CN 201410207173 A CN201410207173 A CN 201410207173A CN 104006019 B CN104006019 B CN 104006019B
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- oil duct
- time oil
- time
- ioad
- valve block
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Abstract
The invention discloses can the Ioad-sensing control valve of remote adjustment pressure reduction, include front valve block, rear valve block, front valve block, have in rear valve block and communicate oil duct, and the first time oil duct communicated with upper oil duct, second time oil duct, 3rd time oil duct, 4th time oil duct, first time oil duct and second time oil duct are connected, first time oil duct, second time oil duct, 3rd time oil duct, 4th time oil duct outer end is combined with screw plug, upper oil cavitie is connected above upper oil duct, this Ioad-sensing control valve of remote adjustment pressure reduction can have Power Limitation effect, invariable power and pressure cut off control the maximal input of the pump that function limits, Ioad-sensing control valve needs arbitrfary point work in the range of this envelope according to load.
Description
Technical field
The present invention relates to control valve field, particularly belonging to can the Ioad-sensing control valve of remote adjustment pressure reduction.
Background technology
Load sensitive system is that one experiences system pressure-traffic demand, and only provides the hydraulic circuit of required flow and pressure.The intact device realizing Ioad-sensing control is made up of following element: firstly the need of a Variable plunger pump, and this pump has a pressure compensator, and when system does not works, compensator can protect low discharge duty under relatively low pressure (200PSI).When system proceeds to duty, compensator is experienced the traffic demand of system and provides adjustable flow when system condition changes according to traffic demand.Meanwhile, the pressure demand of hydraulic system also to be experienced and to respond to hydraulic pump.Most hydraulic systems work the most under constant pressure, when external load changes, the operating pressure of hydraulic system is different, this patent mainly solves conventional load sensitive variable mechanism once pressure reduction and adjusts the problem being difficult to regulation, remotely the pressure reduction of stroking mechanism can be adjusted according to system work requirements.
Summary of the invention
It is an object of the invention to provide a kind of can the Ioad-sensing control valve of remote adjustment pressure reduction, due to the big end of flow piston active area more than small end and make flow piston move to small end realize pump delivery be reduced to delivery side of pump flow be only capable of maintain set up set pressure reduction poised state, this Ioad-sensing control valve of remote adjustment pressure reduction can have Power Limitation effect, invariable power and pressure cut off control the maximal input of the pump that function limits, and Ioad-sensing control valve needs arbitrfary point work in the range of this envelope according to load.
Technical scheme is as follows:
nullCan the Ioad-sensing control valve of remote adjustment pressure reduction，Include front valve block、Rear valve block，Front valve block、Have in rear valve block and communicate oil duct，And the first time oil duct communicated with upper oil duct、Second time oil duct、3rd time oil duct、4th time oil duct，First time oil duct and second time oil duct are connected，First time oil duct、Second time oil duct、3rd time oil duct、4th time oil duct outer end is combined with screw plug，Upper oil cavitie is connected above upper oil duct，Screw plug is installed on upper oil cavitie，It is combined with front valve core in upper oil duct、Back valve core，There is free oil pocket in upper oil duct rear end UNICOM，In empty oil pocket, swivel nut is installed，Swivel nut outer end is screwed with regulation screw，The front spring seat being pressed on regulation screw it is sliding combined with in swivel nut，The bulb overhead of back valve core front end has rear spring seat，It is equipped with big spring between front spring seat and rear spring seat、Little spring，Back valve core is provided with first step、Second step、Intermediate step matches with upper oil duct.
Described front valve core has two steps.
It is set with sealing ring outside described front spring seat, screw plug, swivel nut.
Operation principle of the present invention and work process:
The present invention can the load-sensitive valve block assembly of remote adjustment pressure reduction be installed in BPA series pump, it is by leading to D mouth by delivery side of pump pressure oil, two step front valve core right sides are acted on by D mouth, two step upper valve cores also act on the power that LS2 pressure signal produces simultaneously, this makes a concerted effort to act on back valve core left side by two step front valve cores, back valve core right side acts on is compressed produced spring force by big spring and lower spring, the most also effect has LS1 feedback pressure, by delivery side of pump pressure when i.e. working, the pressure differential deltap P(Δ P=PS+PLS2-PLS of LS2 Yu LS1 feedback pressure) back valve core produced spring force balance produced by power to the right and big spring and little spring.During work, when being continuously increased along with this pressure differential deltap P, the hydraulic coupling of spool left end can be gradually increased, at this moment back valve core can constantly move right and compress big spring and little spring, when pressure reduction not up to sets pressure, B mouth communicates with C mouth, pump is in huge discharge state, when delivery side of pump pressure increases to setting pressure reduction, spool compresses big spring under the effect of the hydraulic coupling of left end and little spring moves right to B mouth and the disconnection of C mouth, A mouth is connected with B mouth simultaneously, at this moment delivery side of pump pressure oil simultaneously acts on the big loculus of flow piston, due to the big end of flow piston active area more than small end and make flow piston move to small end realize pump delivery be reduced to delivery side of pump flow be only capable of maintain set up set pressure reduction poised state；The Main Function of PLS2 hydraulic pressure signal is that it can remove to change the Ioad-sensing control pressure reduction of pump to reach the purpose such as energy-conservation according to the work characteristics of system in real time by hydraulic pressure signal, the signal of telecommunication or other inverted signal.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram.
Fig. 2 is that the present invention is applied to BPA series pump systematic schematic diagram.
Fig. 3 is that the present invention can the Ioad-sensing control variable characteristics curve chart of remote adjustment pressure reduction.
Detailed description of the invention
nullSee Fig. 1，Can the Ioad-sensing control valve of remote adjustment pressure reduction，Include front valve block 1、Rear valve block 2，Front valve block 1、Have in rear valve block 2 and communicate oil duct 3，And the first time oil duct 4 communicated with upper oil duct 3、Second time oil duct 5、3rd time oil duct 6、4th time oil duct 7，First time oil duct 4 is connected with second time oil duct 5，First time oil duct 4、Second time oil duct 5、3rd time oil duct 6、4th time oil duct 7 outer end is combined with screw plug 8，Upper oil cavitie 9 is connected above upper oil duct 3，Screw plug 10 is installed on upper oil cavitie 9，It is combined with front valve core 11 in upper oil duct 3、Back valve core 12，There is free oil pocket 13 in upper oil duct 3 rear end UNICOM，In empty oil pocket 13, swivel nut 14 is installed，Swivel nut 14 outer end is screwed with regulation screw 15，The front spring seat 16 being pressed on regulation screw it is sliding combined with in swivel nut 14，The bulb overhead of back valve core 12 front end has rear spring seat 17，It is equipped with big spring between front spring seat and rear spring seat、Little spring，Back valve core 12 is provided with first step 18、Second step 20、Intermediate step 21 matches with upper oil duct，Front valve core 11 has two steps，Front spring seat、Screw plug、Sealing ring it is set with outside swivel nut.
Fig. 2 is numbered pilot valve assembly 22, servo valve assembly 23, double step load-sensitive valve module 24, flow piston 25.
Claims (1)
- null1. can the Ioad-sensing control valve of remote adjustment pressure reduction，Include front valve block、Rear valve block，It is characterized in that，Front valve block、Have in rear valve block and communicate oil duct，And the first time oil duct communicated with upper oil duct、Second time oil duct、3rd time oil duct、4th time oil duct，First time oil duct and second time oil duct are connected，First time oil duct、Second time oil duct、3rd time oil duct、4th time oil duct outer end is combined with screw plug，Upper oil cavitie is connected above upper oil duct，Screw plug is installed on upper oil cavitie，It is combined with front valve core in upper oil duct、Back valve core，There is free oil pocket in upper oil duct rear end UNICOM，In empty oil pocket, swivel nut is installed，Swivel nut outer end is screwed with regulation screw，The front spring seat being pressed on regulation screw it is sliding combined with in swivel nut，The bulb overhead of back valve core front end has rear spring seat，It is equipped with big spring between front spring seat and rear spring seat、Little spring，Back valve core is provided with first step、Second step、Intermediate step matches with upper oil duct；Described front valve core has two steps；It is set with sealing ring outside described front spring seat, screw plug, swivel nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410207173.0A CN104006019B (en) | 2014-05-15 | Can the Ioad-sensing control valve of remote adjustment pressure reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410207173.0A CN104006019B (en) | 2014-05-15 | Can the Ioad-sensing control valve of remote adjustment pressure reduction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104006019A CN104006019A (en) | 2014-08-27 |
| CN104006019B true CN104006019B (en) | 2016-11-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241688A (en) * | 1998-05-29 | 2000-01-19 | Smc株式会社 | Electropneumatic proportional differential control valve |
| CN201173124Y (en) * | 2008-04-03 | 2008-12-31 | 郑州恒达液压工程中心 | Balancing bidirectional lock possessing pressure compensate function for balancing hoisting jack |
| CN201680023U (en) * | 2010-05-14 | 2010-12-22 | 郑州兴辰机电设备有限公司 | Self-balance unloading valve |
| CN201714403U (en) * | 2010-05-28 | 2011-01-19 | 郑州煤机液压电控有限公司 | High-flow rigid-seal plug-in type hydraulic control one-way valve |
| CN202056131U (en) * | 2011-05-25 | 2011-11-30 | 徐工集团工程机械股份有限公司科技分公司 | Plug-in one-way valve block |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241688A (en) * | 1998-05-29 | 2000-01-19 | Smc株式会社 | Electropneumatic proportional differential control valve |
| CN201173124Y (en) * | 2008-04-03 | 2008-12-31 | 郑州恒达液压工程中心 | Balancing bidirectional lock possessing pressure compensate function for balancing hoisting jack |
| CN201680023U (en) * | 2010-05-14 | 2010-12-22 | 郑州兴辰机电设备有限公司 | Self-balance unloading valve |
| CN201714403U (en) * | 2010-05-28 | 2011-01-19 | 郑州煤机液压电控有限公司 | High-flow rigid-seal plug-in type hydraulic control one-way valve |
| CN202056131U (en) * | 2011-05-25 | 2011-11-30 | 徐工集团工程机械股份有限公司科技分公司 | Plug-in one-way valve block |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 |