CN206000797U - Total power self-adaptation type load-sensitive multiple directional control valve - Google Patents
Total power self-adaptation type load-sensitive multiple directional control valve Download PDFInfo
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- CN206000797U CN206000797U CN201621006003.7U CN201621006003U CN206000797U CN 206000797 U CN206000797 U CN 206000797U CN 201621006003 U CN201621006003 U CN 201621006003U CN 206000797 U CN206000797 U CN 206000797U
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Abstract
The utility model is related to a kind of total power self-adaptation type load-sensitive multiple directional control valve, belong to hydraulic control system technical field, join including oil-feed and commutation connection, oil-feed connection is connected with commutation connection, the opposite side of commutation connection is provided with power ecad valve block, oil-feed connection, commutation connection and power ecad valve block form parallel-connection structure loop, pressure-differentially-set valve is provided with oil-feed connection, pressure-compensated valve is provided with commutation connection, power ecad valve block includes valve body, off-load valve element, spring, annular oil groove P1, annular oil groove P3 and annular oil groove T, and sequence valve is housed on valve body.The utility model not only has the function of load-sensitive while can also power adaptive, and can be with the power of Self Matching engine, both maximum stream flow can be reached in low-load pressure, can also work under very high pressure, cost is not only reduced, the problem that pressure does not increase when engine suppresses car phenomenon and high speed operation when also solving excavator idling work.
Description
Technical field
The utility model belongs to hydraulic control system technical field, and in particular to a kind of total power self-adaptation type load-sensitive
Multiple directional control valve.
Background technology
With the development of engineering machinery, various engineering mechanical devices are to functional diversities, security reliability, comfort level height etc.
Put forward higher requirement, particularly enter the wheel excavator of China, after the rapid expansion of the amount of experienced, market earliest
Enter a more stable state, also the gradually development toward matter in from amount, the system of low side originally much with
The demand in market is not gone up, is to meet that client is comfortable, reliable, efficient performance requirement, each producer is all excellent in renewal by every means
Change hydraulic system, although requirement can be met using the hydraulic system of import, improved cost is too high, because wheeled excavating owner
Client to be directed to is that peasant is individual, very sensitive to price increase.Multiple directional control valve is that construction machinery industry core hydraulic part is high
End technical products, used as the core hydraulic control component of below 6T excavator application, and present multiple directional control valve can not be accomplished
Both maximum stream flow can be reached in low-load pressure, it is also possible to work under very high pressure so that there is excavator idling
The problem that pressure does not increase when engine suppresses car phenomenon and high speed operation during work.
Utility model content
The purpose of this utility model is to provide a kind of total power self-adaptation type load-sensitive multiple directional control valve, coordinates one big one
Little two oil feed pumps, accomplish both to reach maximum stream flow in low-load pressure, it is also possible to work under very high pressure, solution
Determined excavator idling work when the engine problem that pressure does not increase when suppressing car phenomenon and high speed operation.
The utility model total power self-adaptation type load-sensitive multiple directional control valve, oil-feed connection and commutation connection, wherein commutation connection
It is provided with no less than one, oil-feed connection is connected with commutation connection, the opposite side of the connection that commutates is provided with power ecad valve block, oil-feed
Connection, commutation connection and power ecad valve block form parallel-connection structure loop, be provided with pressure-differentially-set valve, arrange in commutation connection in oil-feed connection
There is pressure-compensated valve, power ecad valve block includes valve body, and unloader core is equipped with valve body, and off-load valve element left end is by screw plug one
Seal, the other end is provided with spring, spring is sealed by screw plug two, valve body be machined with the hole of off-load valve element annular oil groove P1,
Annular oil groove P3 and annular oil groove T, is equipped with sequence valve on valve body, the oil-in of sequence valve is connected with annular oil groove P1, sequence valve
Oil-out connection off-load valve element left end and screw plug two in spring cavity, the drain tap of sequence valve connected with annular oil groove T, annular
Oil groove P1 connects the P1 mouth of oil-feed connection and connects oil feed pump one；Annular oil groove P3 connects oil feed pump two, and the discharge capacity of oil feed pump one is big
In oil feed pump two, annular oil groove T connects oil return.
The pressure-differentially-set valve is arranged between the P1 mouth of oil-feed connection and T mouth.
Damping is provided between the off-load valve element left end and annular oil groove T.
Described oil-feed joins, commutation connection and power ecad valve block are fixed by four studs or soket head cap screw,
And sealed using O-ring at connection position, easy for installation, and oil liquid leakage can be prevented.
The off-load valve element right-hand member is integrated with check valve, and compact conformation, prevention oil feed pump one are back to oil feed pump two, play
The effect of protection oil pump two.
The pressure-compensated valve is arranged between the P mouth of commutation connection and LS mouth.
Compared with prior art, the utility model has the advantage of：
Not only have the function of load-sensitive at the same can also power adaptive, mainly for double quantitative gear pump oil supply systems
Wheel excavator, reach low pressure double pump big flow, high pressure list pump low discharge, the power of Self Matching engine, both can be low
Maximum stream flow is reached during load pressure, it is also possible to work under very high pressure, not only reduce cost, also solve excavator
The problem that pressure does not increase when engine suppresses car phenomenon and high speed operation during idling work.
Description of the drawings
Fig. 1 is appearance schematic diagram of the present utility model；
Fig. 2 is hydraulic schematic diagram of the present utility model；
The sectional view that Fig. 3 divides for the utility model power ecad valve block portion；
Fig. 4 commutates for the utility model and joins the sectional view of part；
In figure：1st, oil-feed connection, 1.1, pressure-differentially-set valve, 2, commutation connection, 2.1, pressure-compensated valve, 3, power ecad valve block,
3.1st, valve body, 3.2, off-load valve element, 3.3, check valve, 3.4, spring, 3.5, screw plug one, 3.6, damping, 3.7, sequence valve, 3.8,
Screw plug two.
Specific embodiment
Below against accompanying drawing, by the description to optimum embodiment, specific embodiment of the present utility model is made into one
Step detailed description.
Total power self-adaptation type load-sensitive multiple directional control valve as shown in Figure 1,2 and 3, oil-feed connection 1 and commutation connection 2, its
Middle commutation connection 2 is provided with no less than one, and oil-feed connection 1 is connected with commutation connection 2, and the opposite side of commutation connection 2 is provided with power adaptation
Type valve block 3, oil-feed connection 1, commutation connection 2 and power ecad valve block 3 form parallel-connection structure loop, are provided with level pressure in oil-feed connection 1
Difference limen 1.1, is provided with pressure-compensated valve 2.1 in commutation connection 2, and power ecad valve block 3 includes valve body 3.1, assembling in valve body 3.1
There is off-load valve element 3.2,3.2 left end of off-load valve element is sealed by screw plug 1, and the other end is provided with spring 3.4, and spring 3.4 is by spiral shell
Stifled 2 3.8 seal, and valve body 3.1 is machined with annular oil groove P1, annular oil groove P3 and annular oil groove T at the hole of off-load valve element 3.2,
Sequence valve 3.7 is housed on valve body 3.1, the oil-in of sequence valve 3.7 is connected with annular oil groove P1, the oil-out of sequence valve 3.7 connects
Spring cavity in logical 3.2 left end of off-load valve element and screw plug 2 3.8, the drain tap of sequence valve 3.7 are connected with annular oil groove T3, annular
Oil groove P1 connection oil-feed joins 1 P1 mouth and connects oil feed pump one；Annular oil groove P3 connects oil feed pump two, and the discharge capacity of oil feed pump one is big
In oil feed pump two, annular oil groove T connects oil return box.
Pressure-differentially-set valve 1.1 is arranged between the P1 mouth of oil-feed connection 1 and T mouth.
Damping 3.6 is provided between 3.2 left end of off-load valve element and annular oil groove T.
Oil-feed connection 1, commutation connection 2 and power ecad valve block 3 are fixed by four studs or soket head cap screw, and
Connection position is sealed using O-ring, easy for installation, and can prevent oil liquid leakage.
3.2 right-hand member of off-load valve element is integrated with check valve 3.3, and compact conformation, prevention oil feed pump one are back to oil feed pump two, rise
Effect to protection oil pump two.
Pressure-compensated valve 2.1 as shown in Figure 4 is arranged between the P mouth of commutation connection 2 and LS mouth.
Oil-feed connection 1 is provided with pressure-differentially-set valve 1.1, it is ensured that the pressure reduction at reversal valve opening turnover two ends is constant, flow not with
Load change, the use of pressure-compensated valve 2.1 ensure that each actuator port can be smoothly while work under deficient flow status.In parallel
Structure loop, it is ensured that each executing agency's self contained function, non-interference.Coordinate the use of power ecad valve block 3, when pressure is higher than
During power changing points, flow is reduced, when there is flow saturation, because the effect of pressure-compensated valve 2.1, it is ensured that reversal valve opening
The pressure reduction at place is proportionally reduced, and this results in the flow for passing through and synchronously declines, and keeps proportional to the area of reversal valve opening, respectively
Hydraulic fluid port can be smoothly while work, receive load effect.
Overflow valve is provided with oil-feed connection 1 as shown in Figure 2, overflow valve is arranged between LS mouth and T2 mouth, overflow valve two
End is parallel with choke valve and screen pack.
Operation principle：
When pressure adapts to point 14MPa less than the power that sequence valve 3.7 sets, the oil of annular oil groove P3 passes through off-load valve element
3.2 internal galleries are pushed check valve 3.3 open and enter annular oil groove P1, now Dual-pump flow-converging work；When pressure is set higher than sequence valve 3.7
When fixed power adapts to point 14MPa, sequence valve 3.7 is opened, the oily oil-out through sequence valve 3.7 of an annular oil groove P1 part,
The left end of off-load valve element 3.2 is applied to, off-load valve element 3.2 moves right, the oil of 3.2 right-hand member spring cavity of off-load valve element is pushed into back
Oil duct.Now annular oil groove P3 mouth is opened to the oil duct of annular oil groove T, annular oil groove P3 off-load, and now annular oil groove P3 passes through
Off-load valve element 3.2 enters the oil duct of annular oil groove P1 and is closed, and annular oil groove P1 mouth can not also enter annular oil groove P3, now ring
Shape oil groove P1 carrys out oily oil feed pump one and works, two off-load of oil feed pump.
According to rating formula：P power=p*V*n/ η T；
P is operating pressure；
V is the discharge capacity of pump；
N is the rotating speed of pump；
η T includes volume for the efficiency of pump, and hydraulic machinery is lost；
In the case that the rotating speed of pump is constant；
Operating pressure P is raised, and discharge capacity V of pump reduces a pump work, power will not increase, self adaptation engine
Power.
In sum, the utility model not only have load-sensitive function and meanwhile can also power adaptive, main pin
Wheel excavator to double quantitative gear pump oil supply systems, reaches low pressure double pump big flow, and high pressure list pump low discharge, Self Matching are sent out
The power of motivation, both can reach maximum stream flow in low-load pressure, it is also possible to work under very high pressure, not only reduce
Cost, pressure does not increase when engine suppresses car phenomenon and high speed operation when also solving excavator idling work problem.
The above is that the utility model is exemplarily described, it is clear that the utility model is implemented not by above-mentioned side
The restriction of formula, whether does any change in its shape or structure, if employ method of the present utility model design and
The improvement of the various unsubstantialities that technical scheme is carried out, or not improved by of the present utility model design and technical scheme directly should
For other occasions, all within protection domain of the present utility model.
Claims (7)
1. a kind of total power self-adaptation type load-sensitive multiple directional control valve, oil-feed connection (1) and commutation connection (2), wherein commutation connection (2)
It is provided with no less than one, oil-feed connection (1) is connected with commutation connection (2), it is characterised in that the opposite side of commutation connection (2) arranges active
Rate ecad valve block (3), oil-feed connection (1), commutation connection (2) and power ecad valve block (3) form parallel-connection structure loop, and oil-feed joins
(1) pressure-differentially-set valve (1.1) is provided with, is provided with pressure-compensated valve (2.1) in commutation connection (2).
2. total power self-adaptation type load-sensitive multiple directional control valve according to claim 1, it is characterised in that the power
Ecad valve block (3) includes valve body (3.1), is equipped with unloader core (3.2) in valve body (3.1), off-load valve element (3.2) left end by
Screw plug one (3.5) is sealed, and the other end is provided with spring (3.4), and spring (3.4) is sealed by screw plug two (3.8), and valve body (3.1) exists
Annular oil groove P1, annular oil groove P3 and annular oil groove T is machined with the hole of off-load valve element (3.2), equipped with order on valve body (3.1)
Valve (3.7), the oil-in of sequence valve (3.7) are connected with annular oil groove P1, the oil-out connection off-load valve element of sequence valve (3.7)
(3.2) spring cavity in left end and screw plug two (3.8), the drain tap of sequence valve (3.7) are connected with annular oil groove T, annular oil groove
P1 connection oil-feed joins the P1 mouth of (1) and connects oil feed pump one；Annular oil groove P3 connects oil feed pump two, and the discharge capacity of oil feed pump one is more than
Oil feed pump two, annular oil groove T connect oil return box.
3. total power self-adaptation type load-sensitive multiple directional control valve according to claim 1, it is characterised in that the level pressure
Difference limen (1.1) is arranged between the P1 mouth of oil-feed connection (1) and T mouth.
4. total power self-adaptation type load-sensitive multiple directional control valve according to claim 1, it is characterised in that the off-load
Damping (3.6) is provided between valve element (3.2) left end and annular oil groove T.
5. total power self-adaptation type load-sensitive multiple directional control valve according to claim 1, it is characterised in that described enters
Oil connection (1), commutation connection (2) and power ecad valve block (3) are fixed by four studs or soket head cap screw, and in connection
Position is sealed using O-ring.
6. the total power self-adaptation type load-sensitive multiple directional control valve according to claim 1 or 4, it is characterised in that described unload
Lotus valve element (3.2) right-hand member is integrated with check valve (3.3).
7. total power self-adaptation type load-sensitive multiple directional control valve according to claim 1, it is characterised in that the pressure
Recuperation valve (2.1) is arranged between the P mouth of commutation connection (2) and LS mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621006003.7U CN206000797U (en) | 2016-08-31 | 2016-08-31 | Total power self-adaptation type load-sensitive multiple directional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621006003.7U CN206000797U (en) | 2016-08-31 | 2016-08-31 | Total power self-adaptation type load-sensitive multiple directional control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206000797U true CN206000797U (en) | 2017-03-08 |
Family
ID=58195518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621006003.7U Withdrawn - After Issue CN206000797U (en) | 2016-08-31 | 2016-08-31 | Total power self-adaptation type load-sensitive multiple directional control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206000797U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224315A (en) * | 2016-08-31 | 2016-12-14 | 山东泰丰液压股份有限公司 | Total power self-adaptation type load-sensitive multiple directional control valve |
| CN107061831A (en) * | 2017-06-12 | 2017-08-18 | 南通华东油压科技有限公司 | A kind of Novel work joins valve body moulding |
-
2016
- 2016-08-31 CN CN201621006003.7U patent/CN206000797U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224315A (en) * | 2016-08-31 | 2016-12-14 | 山东泰丰液压股份有限公司 | Total power self-adaptation type load-sensitive multiple directional control valve |
| CN106224315B (en) * | 2016-08-31 | 2017-11-21 | 山东泰丰液压股份有限公司 | Total power self-adaptation type load-sensitive multiple directional control valve |
| CN107061831A (en) * | 2017-06-12 | 2017-08-18 | 南通华东油压科技有限公司 | A kind of Novel work joins valve body moulding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170308 Effective date of abandoning: 20171121 |
|
| AV01 | Patent right actively abandoned |