CN2744871Y - Hydraulic dispenser - Google Patents
Hydraulic dispenser Download PDFInfo
- Publication number
- CN2744871Y CN2744871Y CN 200420115751 CN200420115751U CN2744871Y CN 2744871 Y CN2744871 Y CN 2744871Y CN 200420115751 CN200420115751 CN 200420115751 CN 200420115751 U CN200420115751 U CN 200420115751U CN 2744871 Y CN2744871 Y CN 2744871Y
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- China
- Prior art keywords
- valve
- oil
- directional control
- control valve
- pilot operated
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Abstract
The utility model discloses a hydraulic dispenser the technical project of which comprises a casing provided with an oil inlet, an oil outlet, a return port, a non-return valve (11) connected in series between the oil inlet and the return port sequentially, a lowering speed adjustable valve (12), a lowering solenoid-operated valve (13), and a relief valve (14) connected at the inlet of the non-return valve (11) and at the end of the lowering solenoid-operated valve (13) in parallel. The hydraulic dispenser is characterized in that a differential liquid-control change valve (15) is connected between the oil inlet and the return port, the left control oil recess of the differential liquid-control change valve is communicated with left control oil recess and oil of oil inlet, and the right control oil recess is communicated with the oil inlet and the return port through a two position three way solenoid directional control valve. The hydraulic control circuit of the utility model has the advantages of low unloading pressure, high transmission efficiency, small energy consumption, good sealing, fast switching, simple structure, convenient installation, etc.
Description
Technical field
The utility model relates to a kind of hydraulic control device, particularly a kind of pressure distributor that is used for laser flatting machine.
Background technique:
At present, the domestic laser flatting machine or the hydraulic control device of grader utilize the lifting of 3-position 4-way solenoid directional control valve control level land shovel mostly, and realization is smooth to the soil.There is following shortcoming in the course of the work in this control system:
1. because the 3-position 4-way solenoid directional control valve is a slide-valve structure, when level land shovel oil hydraulic cylinder was in locking state, still there was certain internal leakage in hydraulic system, causes the sinking of level land shovel, influences the level land precision, had increased the lifting number of times of level land shovel.
2. the active force of electromagnet is little, and the diameter of spool is little, and through-current capability is poor.When the 3-position 4-way solenoid directional control valve was in the meta unloaded position, pressure unloading was big, had produced a large amount of quadergy losses.Simultaneously, when lifting position, produce the more pressure loss when fluid circulates this valve, cause the quadergy loss.The energy of loss is transformed into heat, the temperature of fluid is raise, even produce boiling phenomenon, influences the proper functioning of system.
The hydraulic control device of external grader commonly used as shown in Figure 1.When this pressure distributor and China test on medium tractor (as car pusher-654) supporting use carrying out level land commonly used, the hot phenomenon of element surfaces such as oil hydraulic pump, fuel tank, control valve usually appears, even fuel tank fluid boiling phenomenon appears, cause the evaporation of a large amount of hydraulic oil, cause the service behaviour of grader to descend, even can't proper functioning.This explanation hydraulic system energy loss in the course of the work is big, and transmission efficiency is low, and the pressure unloading loss of measuring is 2.5Mpa, is to cause the too high main cause of oil temperature.The too high hydraulic pressure oil viscosity that causes of oil temperature descends, and the leakage of system is obviously increased.The oil temperature rise causes the greasy property of fluid to descend, and causes the increase of the frictional force between each kinematic pair in the element, further impels oily temperature rise again.The aging of non-metal component in the system quickened in the oil temperature rise, makes fluid rotten.Therefore must optimize design of Hydraulic System, reduce the quadergy loss.
Summary of the invention
The purpose of this utility model be to provide a kind of be suitable for laser flatting machine, with China medium tractor hydraulic system commonly used can optimization of matching, energy loss is low and have good quiet dynamic characteristic, the pressure distributor of reliable operation.
Comprise casing in order to reach the technological scheme that the purpose of this utility model takes, on casing, be provided with filler opening, oil outlet and return opening, order is in series with one-way valve (11) between filler opening and return opening, rate of descent modulating valve (12) and decline solenoid electric valve (13), be parallel with safety valve (14) in the ingress of one-way valve (11) and the end of decline solenoid electric valve (13), it is characterized in that, between filler opening and return opening, also be connected with differential type pilot operated directional control valve (15), the left side control oil pocket of this differential type pilot operated directional control valve (15) communicates with filler opening fluid, and right control oil pocket communicates with filler opening and return opening respectively by a two-position three way solenoid directional control valve (10); When the electromagnet energising of two-position three way solenoid directional control valve (10), the right side control oil pocket of differential type pilot operated directional control valve (15) communicates with filler opening; When the electromagnet outage of two-position three way solenoid directional control valve (10), the right side control oil pocket of differential type pilot operated directional control valve (15) communicates with oil outlet.
In the above-mentioned pressure distributor, differential type pilot operated directional control valve (15) comprises that the one end radially is provided with an oil outlet (P
2), the other end radially is provided with a mouth (P that can communicate with the fuel tank high pressure oil
3) valve pocket (18), this valve pocket (18) is near oil outlet (P
2) an end be axially arranged with filler opening (P
1), its other end is provided with the end cap (16) of sealing, depends on axial fuel inlet mouth (P at valve pocket (18)
1) the inwall axial order of an end is provided with spool (19), Returnning spring (17), one end of this Returnning spring (17) contacts with end cap (16), its the other end contacts with spool (19), it is characterized in that, its spool (19) is a differential structure, and the effective active area that promptly leans on Returnning spring (17) one sides is greater than depending on filler opening (P
1) effective active area of a side.
In the above-mentioned pressure distributor, one-way valve 11, decline solenoid electric valve 13, safety valve 14, pilot operated directional control valve 15 all adopt the cone valve type structure.
In the above-mentioned pressure distributor, one-way valve 11, rate of descent modulating valve 12, decline solenoid electric valve 13, safety valve 14, pilot operated directional control valve 15 all adopt thread cartridge formula structure.
It is low that hydraulic control circuit of the present utility model has a pressure unloading, the transmission efficiency height, and advantage such as energy loss is little has solved effectively that present grader hydraulic control system energy consumption is big, the oil temperature is high, the problem of service behaviour difference.Each valve adopts the cone valve type structure, and good seal leaks and lacks, and switch speed is fast, has avoided the quiet sedimentation of level land shovel, has guaranteed the service behaviour of the static and dynamic performance peace diji of hydraulic control system.Owing to adopted the control unit of thread cartridge formula hydraulic control valve, had advantages such as simple in structure, compact, that installation is simple and convenient, maintenance is easy as whole pressure distributor.
Description of drawings
Fig. 1 is a Trimble company grader hydraulic pressure dispensing device control loop schematic diagram in the prior art;
Fig. 2 is this pressure distributor control loop schematic diagram;
Fig. 3 is the structural representation of the pilot operated directional control valve of this pressure distributor.
Embodiment
Be illustrated in figure 1 as Trimble company grader hydraulic pressure dispensing device control loop schematic diagram in the prior art, 1 is the lifting solenoid electric valve among the figure, 2 are the lifting speed-regulating valve, 3 is one-way valve, and 4 is the rate of descent modulating valve, and 5 are the decline solenoid electric valve, 6 is safety valve, 7 is damping hole, and 8 is unloading valve, and 9 is solenoid directional control valve.Its working principle is: when the electromagnet energising conducting of lifting solenoid electric valve 1, unloading valve 8 cuts out, and the import high pressure oil leads to oil outlet by lifting solenoid electric valve 1, lifting speed-regulating valve 2, one-way valve 3; When the electromagnet outage of lifting solenoid electric valve 1 was closed, the import high pressure oil communicated with return opening by unloading valve 8, and pump is in unloading condition; When the electromagnet energising conducting of decline solenoid electric valve 5, outlet oil communicates with return opening by rate of descent modulating valve 4, decline solenoid electric valve 5, solenoid directional control valve 9.
Be illustrated in figure 2 as this pressure distributor control loop schematic diagram, 10 is the two-position three way solenoid directional control valve among the figure, and 11 is one-way valve, and 12 is the rate of descent modulating valve, and 13 are the decline solenoid electric valve, and 14 is safety valve, and 15 is pilot operated directional control valve.
Be illustrated in figure 3 as the structural representation of the pilot operated directional control valve 15 of this pressure distributor, among the figure, 16 is end cap, and 17 is Returnning spring, and 18 is valve pocket, and 19 is spool.
Among Fig. 2, when this pressure distributor is used for laser flatting machine, when the electromagnet energising of two-position three way solenoid directional control valve 10 is on state, the import high pressure oil left control chamber with pilot operated directional control valve 15 on the one hand is logical, communicate with the right control chamber of pilot operated directional control valve 15 by two-position three way solenoid directional control valve 10 on the other hand, because pilot operated directional control valve 15 is a differential structure, so under the effect of hydraulic coupling and spring force, the spool 19 of pilot operated directional control valve moves to right, and closes P
1Mouth and P
2Mouth passage (see figure 3).Import this moment high pressure oil enters level land shovel control oil hydraulic cylinder by one-way valve 11, oil outlet, promotes the level land shovel and rises.When the electromagnet outage of two-position three way solenoid directional control valve 10 is closed, because pilot operated directional control valve 15 right control chambers communicate with fuel tank by two-position three way solenoid directional control valve 10, return opening, left side control chamber and import high pressure oil are logical, so the spool 19 of pilot operated directional control valve 15 moves to left under the fluid pressure effect, make P1 mouth and P2 mouth be in conducting, oil hydraulic pump is in unloading condition.And the electromagnet of working as two-position three way solenoid directional control valve 10 cuts off the power supply, the electromagnet energising of decline solenoid electric valve 13, the hydraulic oil of level land shovel oil hydraulic cylinder is by rate of descent modulating valve 12, decline solenoid electric valve 13, return opening oil sump tank, and the level land shovel descends under the grader action of gravity.When the electromagnet of two-position three way solenoid directional control valve 10 and decline solenoid electric valve 13 all cut off the power supply, level land shovel oil hydraulic cylinder was in locking state under the effect of one-way valve 11 and decline solenoid electric valve 13.
In the present embodiment, each selector valve adopts the 12V DC electromagnet to drive, and has realized electric remote-control mode regulating system operating mode, has satisfied the requirement of mechanically moving.The switching time of pilot operated directional control valve of the present invention is short, and be 0.08 second turn around time, and be 0.072 second resetting time.
Experimental results show that: this pressure distributor has good quiet dynamic characteristic, and pressure unloading has only 0.25Mpa, and speed of response is fast, and lag time is short, has only 0.08 millisecond lag time.
This pressure distributor not only can be used for the hydraulic control system of grader, also can be used for hanging the hydraulic control system of unit, bulldozer, forklift etc. as tractor in the hydraulic control system that other actuator is a single-action hydraulic cylinder.
It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (4)
1, a kind of pressure distributor, comprise casing, on casing, be provided with filler opening, oil outlet and return opening, order is in series with one-way valve (11) between filler opening and return opening, rate of descent modulating valve (12) and decline solenoid electric valve (13), be parallel with safety valve (14) in the ingress of one-way valve (11) and the end of decline solenoid electric valve (13), it is characterized in that, between filler opening and return opening, also be connected with differential type pilot operated directional control valve (15), the left side control oil pocket of this differential type pilot operated directional control valve (15) communicates with filler opening fluid, and right control oil pocket communicates with filler opening and return opening respectively by a two-position three way solenoid directional control valve (10).
2, pressure distributor according to claim 1, its differential type pilot operated directional control valve (15) comprises that the one end radially is provided with an oil outlet (P
2), the other end radially is provided with a mouth (P that can communicate with the fuel tank high pressure oil
3) valve pocket (18), this valve pocket (18) is near oil outlet (P
2) an end be axially arranged with filler opening (P
1), its other end is provided with the end cap (16) of sealing, depends on axial fuel inlet mouth (P at valve pocket (18)
1) the inwall axial order of an end is provided with spool (19), Returnning spring (17), one end of this Returnning spring (17) contacts with end cap (16), its the other end contacts with spool (19), it is characterized in that, its spool (19) is a differential structure, and the effective active area that promptly leans on Returnning spring (17) one sides is greater than depending on filler opening (P
1) effective active area of a side.
3, pressure distributor according to claim 1 and 2 is characterized in that, one-way valve (11), decline solenoid electric valve (13), safety valve (14), pilot operated directional control valve (15) all adopt the cone valve type structure.
4, pressure distributor according to claim 1 and 2 is characterized in that, one-way valve (11), rate of descent modulating valve (12), decline solenoid electric valve (13), safety valve (14), pilot operated directional control valve (15) all adopt thread cartridge formula structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420115751 CN2744871Y (en) | 2004-11-19 | 2004-11-19 | Hydraulic dispenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420115751 CN2744871Y (en) | 2004-11-19 | 2004-11-19 | Hydraulic dispenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2744871Y true CN2744871Y (en) | 2005-12-07 |
Family
ID=35579652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420115751 Expired - Fee Related CN2744871Y (en) | 2004-11-19 | 2004-11-19 | Hydraulic dispenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2744871Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520089C (en) * | 2008-01-18 | 2009-07-29 | 美的集团有限公司 | Control device and control method of hydraulic drive motor |
| CN105298967A (en) * | 2015-11-20 | 2016-02-03 | 湖州生力液压有限公司 | Lifter valve block for high-horsepower tractor |
| CN110820673A (en) * | 2019-11-12 | 2020-02-21 | 武汉纺织大学 | A accurate controllable formula water level floodgate of lifting height for river model |
| CN112096675A (en) * | 2019-09-26 | 2020-12-18 | 上海圣克赛斯液压机械有限公司 | Hydraulic control system of coke guide |
-
2004
- 2004-11-19 CN CN 200420115751 patent/CN2744871Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520089C (en) * | 2008-01-18 | 2009-07-29 | 美的集团有限公司 | Control device and control method of hydraulic drive motor |
| CN105298967A (en) * | 2015-11-20 | 2016-02-03 | 湖州生力液压有限公司 | Lifter valve block for high-horsepower tractor |
| CN112096675A (en) * | 2019-09-26 | 2020-12-18 | 上海圣克赛斯液压机械有限公司 | Hydraulic control system of coke guide |
| CN110820673A (en) * | 2019-11-12 | 2020-02-21 | 武汉纺织大学 | A accurate controllable formula water level floodgate of lifting height for river model |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |