CN200986032Y - Seal oil structure between main valve core and king valve cover of over-flow valve - Google Patents
Seal oil structure between main valve core and king valve cover of over-flow valve Download PDFInfo
- Publication number
- CN200986032Y CN200986032Y CN 200620049233 CN200620049233U CN200986032Y CN 200986032 Y CN200986032 Y CN 200986032Y CN 200620049233 CN200620049233 CN 200620049233 CN 200620049233 U CN200620049233 U CN 200620049233U CN 200986032 Y CN200986032 Y CN 200986032Y
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- valve
- main valve
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- pressure
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Abstract
The utility model aims at providing an oil seal structure placed between the overflow valve main valve core and the main valve housing. The oil seal structure converts from the conical surface verne line seal to the angle square surface. The utility model is characterized in that the valve is improved in terms of the low pressure feature, and the pressure regulating is steady. The on and off performance is enhanced. The pressure regulating is improved in terms of steadiness and the conduit valve body is shortened. Therefore, the oil seal structure is improved and the oil seal performance is enhanced.
Description
Technical field
The utility model relates to a kind of oil sealing structure of valve, the main valve plug of particularly a kind of relief valve of equalizing piston formula (type pilot) and the oil sealing structure between the main valve housing.
Background technique
At present, existing equalizing piston formula relief valve (type pilot) is to be made of guide's part and primary valve part two-part mostly.Circuit pressure is added in top guide's part earlier, is added in main valve plug top by aperture (damping hole) then.When the pressure in the loop surpassed setting pressure, pressure oil backed down the cone valve of pilot valve by aperture, and flows back to fuel tank.At this moment, in the generation pressure difference up and down of main valve plug main valve plug is pushed open, valve is opened, the oil in loop flows back to fuel tank.When circuit pressure reduced, main valve plug kept balance, and under the effect of balance spring power, main valve plug descends and closes, and keeps the setting pressure of system.So, the diameter of main valve plug, quite important to the unlatching of main valve, the sensitivity of closing.Usually, the guide has only in the loop fixer resistance, forms variable liquid resistance between poppet valve core and valve seat.When spillway discharge increased, the aperture of poppet port and primary valve all will increase, and spring force and steady-state fluid force increase, and pressure adjusting spring often is in stress, and spring rigidity originally is relatively poor, and stepping is few.Pressure regulation difficulty and unstable causes valve body longer simultaneously, and weight increases.Simultaneously, because original guide valve core is a cone valve structure, adjusting moment is big, the manufacture difficulty height.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of main valve plug of the pilot operated compound relief valve that meets international standard and foreign advanced standard and the oil sealing structure between the main valve housing.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
A kind of main valve plug of relief valve and the oil sealing structure between the main valve housing is characterized in that, the oil sealing form between the main valve plug of described relief valve and the main valve housing changes the angle square face seal into by the sealing of conical surface valve line.
Advantage of the present utility model is: improved the low pressure characteristic of valve, made pressure regulation steady, negotiability is big, has improved open and shut characteristic; Improve pressure regulation stability and shortened the pilot valve body length; Improve the oil sealing form, improved the oil sealing characteristic.
Figure of description
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of oil sealing structure between the main valve plug of the utility model relief valve and the main valve housing.
Fig. 2 is a spool valve pocket assembly schematic representation in the utility model.
Embodiment
For the utility model is further described, illustrated below in conjunction with specific embodiment.
As shown in Figure 1 and Figure 2, relief valve comprises main valve 1 and the pilot valve 2 that is fixed on the main valve 1, described main valve comprises main valve plug 3 and main valve housing 16, pilot valve 2 comprises pressure adjusting spring 9, guide valve core 8, wherein, the main valve plug 3 of pilot operated compound relief valve and the oil sealing form of main valve housing 16 change the angle square face seal into by the sealing of conical surface valve line, have improved the oil sealing characteristic.
During use, the pressure among the oil circuit A acts on the main valve plug 3, and simultaneously, the control access 6 and 7 of pressure through having throttle orifice 4 and 5 acts on the guide valve core 8 of the spring-loaded side of main valve plug 3 and pilot valve 2.If the pressure among the path A surpasses the setting value of pressure adjusting spring 9, then guide valve core 8 overcomes pressure adjusting spring 9 unlatchings.To this, this signal is by controlling oil 10 and 6 from A path internal feed.The fluid of main valve plug 3 spring-loaded sides flows into spring chamber 12 through control access 7, throttling 11 and guide valve core 8.By control circuit 13 from internal feed here; Or outside the supply, introduce fuel tank by control access 14.When throttle orifice 4 and 5 produces pressure drop on main valve plug 3, open by A pipe to B pipe connection mouth.Fluid flows to the B pipe by the A pipe, and the working pressure of setting remains unchanged.Relief valve can be to different pressures (second pressure nominal value) off-load or switching by hydraulic fluid port X (15).
DB10 is two embodiment's models of the present utility model, and DB30 is a control group, and their the key technical indexes contrast is as follows:
| Main performance index and quality requirement | DB10 | DB30 | |
| Pressure maximum MPa | 35 | 31.5 | |
| Peak rate of flow L/min | 250 | 200 | |
| Open and shut characteristic | The unlatching rate | 94 | 90 |
| Make rate | 92 | 88 | |
| Range of regulation MPa | ～5～10～20～31.5～20 | ～5～31.5 | |
| Life-span 〉=ten thousand time | 50 | 25 | |
| Cleaning inside degree≤mg | 14.3 | 15 | |
The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1, a kind of main valve plug of relief valve and the oil sealing structure between the main valve housing is characterized in that, the oil sealing form between described main valve plug and the main valve housing is the angle square face seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620049233 CN200986032Y (en) | 2006-12-20 | 2006-12-20 | Seal oil structure between main valve core and king valve cover of over-flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620049233 CN200986032Y (en) | 2006-12-20 | 2006-12-20 | Seal oil structure between main valve core and king valve cover of over-flow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200986032Y true CN200986032Y (en) | 2007-12-05 |
Family
ID=38915488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620049233 Expired - Lifetime CN200986032Y (en) | 2006-12-20 | 2006-12-20 | Seal oil structure between main valve core and king valve cover of over-flow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200986032Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207112A (en) * | 2011-06-13 | 2011-10-05 | 江铃汽车股份有限公司 | Double electronic control pilot type electromagnetic relief valve |
-
2006
- 2006-12-20 CN CN 200620049233 patent/CN200986032Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207112A (en) * | 2011-06-13 | 2011-10-05 | 江铃汽车股份有限公司 | Double electronic control pilot type electromagnetic relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071205 |
|
| EXPY | Termination of patent right or utility model |