CN202326478U - Inlet pressure compensator in hydraulic control loop - Google Patents
Inlet pressure compensator in hydraulic control loop Download PDFInfo
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- CN202326478U CN202326478U CN 201120457629 CN201120457629U CN202326478U CN 202326478 U CN202326478 U CN 202326478U CN 201120457629 CN201120457629 CN 201120457629 CN 201120457629 U CN201120457629 U CN 201120457629U CN 202326478 U CN202326478 U CN 202326478U
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- compensator
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Abstract
The utility model discloses an inlet pressure compensator in a hydraulic control loop. The inlet pressure compensator comprises a pressure inserter, a pressure control element, a pressure balancing and unload distribution element, a pressure detection joint and a valve body, wherein the pressure inserter and the pressure control element are combined together and installed on an oil inlet path of the valve body to form a pressure relief valve, which is a fixed difference type pressure relief valve formed by an oil path connecting manner; and the pressure balancing and unload distribution element is symmetrically arranged on an oil path A and an oil path B of the valve body, and is connected with the outlet of the pressure control element, so that the pressure inserter, the pressure control element and the pressure balancing and unload distribution element form a P->A or P->B fixed difference type pressure relief valve. According to the utility model, the inlet pressure compensator is an adjustable superposed type inlet pressure compensator, and forms the hydraulic control loop together with a proportioning valve, a pilot controlled check valve and an oil cylinder of an actuating mechanism, so that the purpose that the actuating mechanism operates stably is realized; and the inlet pressure compensator disclosed by the utility model is suitable for different work occasions and various working conditions, and has better flexibility.
Description
Technical field
The utility model relates to technical field of hydraulic, is specifically related under a kind of operating mode of varying load in hydraulic control circuit in order to the steady inlet pressure compensator of control of the speed that guarantees actuator.
Background technique
In technical field of hydraulic; Exist the load of variation in the running of many hydraulic actuators; In this case, if adopt common oil hydraulic circuit control mode, owing to the influence of load causes the flow control valve inlet outlet pressure differential to have bigger variation to cause actuator's speed extremely instability and out-of-control phenomenon; Even some oil hydraulic circuit has adopted proportional valve control, also may can't reach the purpose of speed smooth running through the electrical signal compensation owing to load variations is too big.It is reported; There is a kind of ZDC type inlet pressure compensator in German Bosch's BOSCH-REXROTH (REXROTH) company at present; In its product information RC29224/06.99, can find, but its compensatory pressure is unadjustable and compensatory pressure can not detect, and does not retrieve Related product and applies for a patent in China.
Summary of the invention
For solving the problems referred to above that existing technology exists; The utility model will design the inlet pressure compensator in a kind of hydraulic control circuit; Solve in the existing hydraulic control circuit for problems such as speed controlling instability that the actuator under the varying load operating mode produced, rigidity differences the purpose that actuator is reached operate steadily.
To achieve these goals; The technological scheme of the utility model is following: the inlet pressure compensator in a kind of hydraulic control circuit; Comprise pressure plug-in unit, pressure control valve, pressure balance off-load distribution member, Pressure testing contact and valve body; Described pressure plug-in unit and pressure control valve are combined and are constituted a reduction valve on the in-line that is installed in valve body, and form the setting difference type reduction valve through the Placement of oil circuit; Described pressure balance off-load distribution member is arranged symmetrically on the oil circuit A and oil circuit B of valve body; And be connected with the outlet of pressure control valve, make pressure plug-in unit, pressure control valve and pressure balance off-load distribution member constitute the setting difference type reduction valve of P → A or P → B; Described Pressure testing contact connection pressure gauge or pressure transducer are used to detect the working state of inlet pressure compensator.
The described valve body of the utility model adopts the spheroidal graphite cast iron casting.
Compared with prior art, the utlity model has following beneficial effect:
1, the utility model is a kind of adjustable overlapping inlet pressure compensator, and itself and Proportional valve, Pilot operated check valve and actuator's oil cylinder are formed hydraulic control circuit, the purpose that actuator is reached operate steadily.Its principle is following: have the characteristic of throttle valve based on Proportional valve, and the Flow characteristics equation of its throttle valve: q
v=KS Δ p
mWherein flow coefficient k and restriction shape index m are certain for certain valve; Throttle valve flow area S is artificial sets or given relatively through program, and for the constant pressure pumping station controlling system, just is decided by the variation of load, the flow q of load like this through the pressure drop Δ p of throttle valve
vVariation will depend on the variation of load and cause the variation of throttle valve pressure drop Δ p that promptly the speed of actuator receives Δ p
mInfluence.The Δ p of P → A oil circuit and P → B oil circuit that adjustable overlapping inlet pressure compensator is used for stablizing passing ratio valve (throttle valve) exactly is constant basically, thereby has guaranteed the constant airspeed and the stationarity of actuator.
2, the utility model adopts a pressure plug-in unit, a pressure control valve, a balance off-load distribution member and the assembling of a casting valve body to constitute; The installation of this adjustable overlapping inlet pressure compensator can be superimposed on the Proportional valve bottom easily; The pressure reduction that can limit passing ratio electro-hydraulic reversing valve import P → A oil circuit and P → B oil circuit during work is constant; Thereby guarantee the influence that the flow of Proportional valve under certain electric current do not changed by load force; Flow through Proportional valve keeps original linear performance, the occasion that suitable load variations is bigger.
3, the P of the utility model → A oil circuit and P → B oil circuit pressure reduction is adjustable; Can combine the situation of needed flow and pressure difference to regulate according to need of load and the Proportional valve performance that reality is used; The more convenient needs that are suitable for different operating occasion and various operating modes have better flexibility.
4, the utility model is provided with partial pressure and detects contact on the valve body of inlet pressure compensator, can carry out pressure measurement and monitoring.
5, the utility model is very convenient to type selecting in design, and its specification has comprised normally used DN10, DN16, DN25, DN32, selects for use this pressure compensator also to simplify the design work amount of hydraulic circuit valve piece.Installation dimension meets the ISO4401 Conncetion cimension.
6, the utility model project organization is compact, and boundary dimension is little, is convenient to design and installation and arranges; Valve body adopts the spheroidal graphite cast iron casting, makes the inner passage reasonable Arrangement, reduces fluid resistance.
Description of drawings
5 in the total accompanying drawing of the utility model, wherein:
Fig. 1 is adjustable overlapping inlet pressure compensator external form schematic representation.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 is adjustable overlapping inlet pressure compensator schematic diagram.
Fig. 4 is adjustable overlapping inlet pressure compensator structure sectional drawing.
Fig. 5 is adjustable overlapping inlet pressure compensator typical case applicable working condition instance sketch.
Among the figure: 1. pressure plug-in unit, 2. pressure control valve, 3. pressure balance off-load distribution member, 4. Pressure testing contact, 5. Proportional valve, 6. Pilot operated check valve, 7. actuator's oil cylinder.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.Shown in Fig. 1-5; Inlet pressure compensator in a kind of hydraulic control circuit; Comprise pressure plug-in unit 1, pressure control valve 2, pressure balance off-load distribution member 3, Pressure testing contact 4 and valve body; Described pressure plug-in unit 1 is combined with pressure control valve 2 and is constituted a reduction valve on the in-line that is installed in valve body, and forms the setting difference type reduction valve through the Placement of oil circuit; Described pressure balance off-load distribution member 3 is arranged symmetrically on the oil circuit A and oil circuit B of valve body; And be connected with the outlet of pressure control valve 2, make pressure plug-in unit 1, pressure control valve 2 and pressure balance off-load distribution member 3 constitute the setting difference type reduction valve of P → A or P → B; Described Pressure testing contact 4 connection pressure gauges or pressure transducer are used to detect the working state of inlet pressure compensator.Described valve body adopts the spheroidal graphite cast iron casting.
The working principle of the utility model is following: the interface A of the size of adopting international standards on the pressure compensator, interface B, interface P, interface T, interface X and interface L link to each other with the corresponding interface of Proportional valve 5 with stacking type hydraulic control check valve 6 respectively; As Proportional valve 5 control P → when the B oil circuit communicates; A → T oil circuit is also connected; This moment, hydraulic oil will be through pressure plug-in unit 1, again through the piston cavity of the P of Proportional valve 5 → B oil circuit entering actuator oil cylinder 7; Piston rod is stretched out, and rod end chamber hydraulic oil then gets into fuel tank by the A → T oil circuit of Proportional valve 5.At this moment the interface T that makes pressure control valve 2 links to each other with the interface B of Proportional valve 5 because the spool of pressure balance off-load element 3 moves to left under the effect of P → B ' oil circuit pressure oil; Make pressure plug-in unit 1 and pressure control valve 2 constitute fixed poor decompression state; Define the pressure reduction of the P → B oil circuit of Proportional valve 5; Thereby can overcome the interference of the P → B oil circuit pressure reduction of the variation Comparative Examples valve 5 of load force; Make Proportional valve 5 can keep originally metering characteristics preferably, make actuator's oil cylinder 7 obtain the purpose of ideal stability operation.The effect of Pilot operated check valve 6 is for the interface A of pressure compensator when Proportional valve 5 is in the meta function and interface B pressure balance release, thereby guarantees actuator's oil cylinder 7 location securities locking.Can be simultaneously the pressure reduction of P → B oil circuit and P → A oil circuit be carried out auxiliary adjustment through pressure control valve 2, can make Proportional valve 5 have the control range of broad.
When actuator's oil cylinder 7 inverted running piston rods are withdrawn; The spool of the pressure balance off-load element 3 interface T that makes pressure control valve 2 that under the effect of P → A ' oil circuit pressure oil, moves to right links to each other with the interface A of Proportional valve 5; Then pressure plug-in unit 1 has constituted fixed poor decompression state equally with pressure control valve 2; Limited the pressure reduction of the P → A oil circuit of Proportional valve 5, actuator's oil cylinder 7 obtains the purpose of ideal stability operation equally at inverted running.
Claims (1)
1. the inlet pressure compensator in the hydraulic control circuit; It is characterized in that: comprise pressure plug-in unit (1), pressure control valve (2), pressure balance off-load distribution member (3), Pressure testing contact (4) and valve body; Described pressure plug-in unit (1) is combined with pressure control valve (2) and is constituted a reduction valve on the in-line that is installed in valve body, and forms the setting difference type reduction valve through the Placement of oil circuit; Described pressure balance off-load distribution member (3) is arranged symmetrically on the oil circuit A and oil circuit B of valve body; And be connected with the outlet of pressure control valve (2), make pressure plug-in unit (1), pressure control valve (2) and pressure balance off-load distribution member (3) constitute the setting difference type reduction valve of P → A or P → B; Described Pressure testing contact (4) connection pressure gauge or pressure transducer are used to detect the working state of inlet pressure compensator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457629 CN202326478U (en) | 2011-11-17 | 2011-11-17 | Inlet pressure compensator in hydraulic control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457629 CN202326478U (en) | 2011-11-17 | 2011-11-17 | Inlet pressure compensator in hydraulic control loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202326478U true CN202326478U (en) | 2012-07-11 |
Family
ID=46438459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120457629 Expired - Fee Related CN202326478U (en) | 2011-11-17 | 2011-11-17 | Inlet pressure compensator in hydraulic control loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202326478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367817A (en) * | 2011-11-17 | 2012-03-07 | 大连华锐股份有限公司 | Inlet pressure compensator in hydraulic control loop |
-
2011
- 2011-11-17 CN CN 201120457629 patent/CN202326478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367817A (en) * | 2011-11-17 | 2012-03-07 | 大连华锐股份有限公司 | Inlet pressure compensator in hydraulic control loop |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20120711 Termination date: 20171117 |