CN204402606U - A kind of load-carrying natural gas used for automobile valve oil seal - Google Patents
A kind of load-carrying natural gas used for automobile valve oil seal Download PDFInfo
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- CN204402606U CN204402606U CN201520018461.1U CN201520018461U CN204402606U CN 204402606 U CN204402606 U CN 204402606U CN 201520018461 U CN201520018461 U CN 201520018461U CN 204402606 U CN204402606 U CN 204402606U
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- main lip
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- oil seal
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Abstract
The utility model is a kind of load-carrying natural gas used for automobile valve oil seal, comprise outside passive metal frame, inner guaranteed caulking gum body, and the spring providing lasting radial force lock ring to be wound around, rubber body internal diameter is provided with a main lip, wherein main lip is outwards provided with the pasta angle axially becoming 38 ~ 54 ° of angles with it, and main lip is provided with to the direction of firing chamber the angle, gas face axially becoming 13 ~ 25 ° of angles with it; The center of spring groove is located at side, angle, gas face, and the distance between center line 0.15 ~ 0.55mm of main lip.In the utility model, the effect of main lip should ensure the lip lubricate that micro-machine oil enters oil sealing, and stop that too much machine oil enters cylinder participation burning and causes valve carbon distribution again, the assembling being applicable to load-carrying natural gas used for automobile valve uses.
Description
Technical field
The utility model relates to the oil sealing parts of truck engine valve position, specifically a kind of load-carrying natural gas used for automobile valve oil seal.
Background technique
Natural gas motor truck take rock gas as a kind of gaseous fuel automobile of fuel.
When automobile does fuel with rock gas, in air cylinder, natural gas flow is through total air valve, filter cleaner, solenoid valve enters decompressor, through multi-step pressure reduction to negative pressure, then enters mixer by dynamic valve, rock gas mixes with air in the cylinder of four stroke engine, by plug ignition, promote piston and move up and down, impel engine crankshaft to rotate.Valve oil seal is one of strength member of engine valve group, moves reciprocatingly under the effect of piston.Because piston acting produces high pressure, internal pressure of combustion chamber can reach (-1bar ~ 7bar).
Lubricating oil leakage during in order to prevent to-and-fro motion under high pressure, devises valve oil seal herein and realizes sealing.
Notification number is: the natural gas engine valve stem seal arrangement of CN 202391056 U, described stuffing box gland stretches out pedestal, substantially all seal arrangements are all adopt this kind of structure, and spring be arranged on pedestal annular groove in be also usual technological means, but although several annular ridges in stuffing box gland serve the effect of sealing in use, but motor is the workpiece of a High Rotation Speed and burning, so the annular ridge in stuffing box gland plays temporary transient seal action, be unfavorable for permanent use, main cause is not lubricated, dry friction completely, high temperature simultaneously, valve carbon distribution in high-pressure reciprocating motion, oil consumption is greatly also a problem demanding prompt solution.
Summary of the invention
The utility model is good in order to propose a kind of resistance to pressure, solves due to the valve carbon distribution in to-and-fro motion under high temperature, high pressure, problem that oil consumption is large, improves the sealing of oil sealing, specially proposes a kind of load-carrying natural gas used for automobile valve oil seal.
The technical solution of the utility model is for this reason, a kind of load-carrying natural gas used for automobile valve oil seal, comprise outside passive metal frame, the rubber body of the inner guaranteed sealing of metal frame, the external diameter of rubber body outer end is provided with the spring of lasting radial force lock ring winding by spring groove, it is characterized in that: the internal diameter of rubber body outer end is provided with a main lip, wherein main lip is provided with the pasta angle axially becoming 38 ~ 54 ° of angles with it to oily side direction, and main lip is provided with the angle, gas face axially becoming 13 ~ 25 ° of angles with it to direction, firing chamber; The center of spring groove is located at side, angle, gas face, and the distance between center line 0.15 ~ 0.55mm of main lip.
Further improvement is: the magnitude of interference being provided with 1.1 ~ 1.4mm between main lip and valve guide rod.
Further improvement is: main lip is provided with intrados, and wherein intrados is the circular arc of R0.3 ~ R0.5mm.
Further improvement is: rubber body adopts fluorine rubber to be made.
Further improvement is: spring adopts alloy steel wire lock ring to be entwined.
Further improvement is: the rubber body internal surface in metal frame is provided with sealed muscle, has the magnitude of interference of 0.25 ~ 0.45mm between sealed muscle and valve guide rod.
Beneficial effect:
In the utility model, the effect of main lip should ensure the lip lubricate that micro-machine oil enters oil sealing, stops that too much machine oil enters cylinder participation burning and causes valve carbon distribution again.Therefore be designed with the magnitude of interference of 1.1 certain ~ 1.4mm between main lip and valve guide rod, the size of magnitude of interference directly affects the sealing of oil sealing; When magnitude of interference is excessive, oil sealing lip and between centers can not form oil film, produce dry friction between reciprocating valve and oil sealing lip, and under high-speed motion, oil sealing lip and axle produce high temperature, accelerate ageing of rubber, be full of cracks, cause seal failure; When magnitude of interference is too small, can cause rupture of oil film after oil slick thickness exceedes oil film tension force, machine oil enters cylinder and participates in burning, and oil consumption is large, causes valve carbon distribution.
Wherein main lip is provided with to oily side and its pasta angle axially becoming 38 ~ 54 ° of angles, and this angle is larger, and frizing power is large, and sealing effect is better; Main lip is provided with and its angle, gas face axially becoming 13 ~ 25 ° of angles to the direction of firing chamber, and the less resistance to pressure in this angle is better, and engine oil leakage quantity is less.
The center of spring groove is located at side, angle, gas face, and the distance between center line 0.15 ~ 0.55mm of main lip, ensures that acting force of the spring is in the position of lip, is unlikely to depart from main lip.
Main lip is provided with intrados, and wherein intrados is the circular arc of R0.3 ~ R0.5mm, strengthens the laminating width with axle, ensures large sealed under pressure;
Rubber body selects the fluorine rubber that heat-resisting quantity is good, mill property is good;
Alloy steel wire selected by spring, and at high temperature tensile stress decay slowly; Improve oil sealing main lip unit length radial force, add 14% on the original basis.
The setting of sealed muscle ensure that valve oil seal and guide rod assemble, when valve oil seal is assembled and guide rod have certain magnitude of interference, prevent oil sealing because of loosen and deviate from.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present utility model.
In figure, 1 is rubber body, and 2 is main lips, and 3 is sealed muscles, and 4 is pasta angles, and 5 is angles, gas face, and 6 is springs, 7 metal frames, and A is oily side direction, and B is direction, firing chamber.
Embodiment
The utility model as shown in Figure 1.
A kind of load-carrying natural gas used for automobile valve oil seal, comprise metal frame 7, one end of metal frame 7 is provided with rubber body 1, the external diameter of rubber body 1 outer end is provided with spring 6 by spring groove, the internal diameter of rubber body 1 outer end is provided with a main lip 2, wherein main lip 2 is provided with the pasta angle 4 axially becoming 38 ~ 54 ° of angles with it to oily side direction A, and main lip 2 is provided with the angle, gas face 5 axially becoming 13 ~ 25 ° of angles with it to direction, firing chamber B; The center of spring groove is located at side, angle 5, gas face, and the distance between center line 0.15 ~ 0.55mm of main lip 2.
Main lip 2 internal diameter is provided with the magnitude of interference having 1.1 ~ 1.4mm between valve guide rod.
Main lip 2 is provided with intrados, and wherein intrados is the circular arc of R0.3 ~ R0.5mm.
Sealing 1 is made for fluorine rubber.
Spring 6 is entwined for alloy steel wire lock ring.
Rubber body 1 internal surface in metal frame 7 is provided with many sealed muscles 3, has the magnitude of interference of 0.25 ~ 0.45mm between sealed muscle 3 and valve guide rod.
Claims (6)
1. a load-carrying natural gas used for automobile valve oil seal, comprise outside passive metal frame, metal frame inside is provided with the rubber body ensureing sealing, the external diameter of rubber body outer end is provided with the spring providing lasting radial force lock ring to be wound around by spring groove, it is characterized in that: the internal diameter of rubber body outer end has a main lip, main lip is provided with the circular arc of R0.3 ~ R0.5mm; Main lip is provided with the pasta angle axially becoming 38 ~ 54 ° of angles with it to oily side direction; Main lip is provided with the angle, gas face axially becoming 13 ~ 25 ° of angles with it to direction, firing chamber; The center of spring groove is located at side, angle, gas face, apart from the distance between center line 0.15 ~ 0.55mm of main lip.
2. a kind of load-carrying natural gas used for automobile valve oil seal according to claim 1, is characterized in that: the magnitude of interference being designed with 1.1 ~ 1.4mm between main lip and valve guide rod.
3. a kind of load-carrying natural gas used for automobile valve oil seal according to claim 1 and 2, it is characterized in that: main lip is provided with intrados, wherein intrados is the circular arc of R0.3 ~ R0.5mm.
4. a kind of load-carrying natural gas used for automobile valve oil seal according to claim 1, is characterized in that: rubber body is that fluorine rubber is made.
5. a kind of load-carrying natural gas used for automobile valve oil seal according to claim 1, is characterized in that: spring is that alloy steel wire lock ring is entwined.
6. a kind of load-carrying natural gas used for automobile valve oil seal according to claim 1 or 4, is characterized in that: the rubber body internal surface in metal frame is provided with sealed muscle, and sealed muscle and valve guide rod have the magnitude of interference of 0.25-0.45mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520018461.1U CN204402606U (en) | 2015-01-13 | 2015-01-13 | A kind of load-carrying natural gas used for automobile valve oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520018461.1U CN204402606U (en) | 2015-01-13 | 2015-01-13 | A kind of load-carrying natural gas used for automobile valve oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204402606U true CN204402606U (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520018461.1U Active CN204402606U (en) | 2015-01-13 | 2015-01-13 | A kind of load-carrying natural gas used for automobile valve oil seal |
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| CN (1) | CN204402606U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564209A (en) * | 2015-01-13 | 2015-04-29 | 十堰东森汽车密封件有限公司 | Natural gas valve oil seal for heavy duty truck |
-
2015
- 2015-01-13 CN CN201520018461.1U patent/CN204402606U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564209A (en) * | 2015-01-13 | 2015-04-29 | 十堰东森汽车密封件有限公司 | Natural gas valve oil seal for heavy duty truck |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |