CN207568672U - A kind of polytetrafluoroethylene (PTFE) valve oil seal structure - Google Patents
A kind of polytetrafluoroethylene (PTFE) valve oil seal structure Download PDFInfo
- Publication number
- CN207568672U CN207568672U CN201721632677.2U CN201721632677U CN207568672U CN 207568672 U CN207568672 U CN 207568672U CN 201721632677 U CN201721632677 U CN 201721632677U CN 207568672 U CN207568672 U CN 207568672U
- Authority
- CN
- China
- Prior art keywords
- seal
- valve
- ptfe
- polytetrafluoroethylene
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The utility model discloses a kind of polytetrafluoroethylene (PTFE) valve oil seal structures, including seal and ring spring, the seal is socketed at the port of the engine valve guide of peripheral hardware, the seal generally Teflon member, including main body, seal lip and socket part, the socket part surround and is close to the lateral wall of valve guide bushing near ports, the upper end of the socket part and the main body integrally connected, the main body has upper surface and lower face, the lower face is abutted with the end face of valve guide bushing, the upper surface is equipped with annular incision, the ring spring is embedded in annular incision, main body is divided into seal lip by annular incision close to inboard portion.The seal generally Teflon member solves the problems, such as common rubber valve oil sealing easy ageing failure under engine high-temperature operating mode, also avoids the bonding of other structures polytetrafluoroethylene (PTFE) and rubber component.
Description
Technical field
The utility model is related to fuel engines technical field of sealing technology.
Background technology
Polytetrafluoroethylene (PTFE) (PTFE) has excellent chemical stability, corrosion resistance, is corrosion resistance in the world today
One of optimal material is widely used in the various occasions for needing antiacid alkali and organic solvent, it solve chemical industry, oil, pharmacy,
Many problems in the fields such as hydraulic system.Polytetrafluoroethylene (PTFE) has been widely used as sealing material and packing material, and poly- four
Vinyl fluoride sealing element, gasket, seal washer are to process system by cold-rolled sintered mould pressing process with polymeric polytetrafluoroethylene resin
Into.
Valve oil seal is a component of fuel engines valve actuating mechanism, and effect is that machine oil should be blocked to enter cylinder combustion
Burning avoids machine oil abnormal wear, has certain machine oil to enter valve guide bushing again, keeps the normal profit of valve guide bushing and valve stem
It is sliding, well known technology be by the use of rubber as sealed body, due to valve oil seal high temperature, high frequency, high speed operating mode under work, often
There is hard cracking with the easy high temperature ageing of rubber material, cause seal failure, and rubber material friction coefficient is larger,
Lip inordinate wear is be easy to cause under the operating mode of high-frequency high-speed movement and seal failure.Polytetrafluoroethylene (PTFE) has excellent high temperature resistant
Characteristic, and have extremely low friction coefficient, it is the excellent material for making valve oil seal.However, polytetrafluoroethylene (PTFE) has protrusion not
Viscosity, is both fabulous adhesive and it is extremely difficult with the surface bonding of other objects.Chinese patent CN
A kind of rubber composite valve oil seal disclosed in 201321881 Y includes skeleton, spring and the rubber bullet being located on inboard wall of skeleton
Property body, be embedded in caoutchouc elasticity body at the top of skeleton, rubber elastomer, which is equipped with, seals main lip, seal main lip by with skeleton
The excessive mouth being connected with the cavity of elastic rubbery body package and the containing mouth on excessive mouth and outer flaring composition, spring pocket
On the lateral wall for sealing main lip, the containing mouth inner wall is equipped with one layer of filled polytetrafluoroethylene sheeting, filling
Ptfe sheet material is compound by coupling, graft reaction and the rubber on containing mouth inner wall, but for above-mentioned spy
2., coupling, the bonding of graft reaction are also difficult to keep permanent service life to point.Therefore, if wanting to make full use of polytetrafluoroethylene (PTFE)
Oil cylinder valve oil seal is made, then needs more reasonably structure that could realize.
Utility model content
A kind of polytetrafluoroethylene (PTFE) valve oil seal structure of the utility model, teflon seal by with metal spring leaf
Physical connection structure realize to the excellent sealing of oil cylinder valve.
A kind of polytetrafluoroethylene (PTFE) valve oil seal structure, including seal and ring spring, the seal is socketed on peripheral hardware
Engine valve guide port at, the seal generally Teflon member, including main body, seal lip and set
Socket part, the socket part surround and are close to the lateral wall of valve guide bushing near ports, the upper end of the socket part and the main body
Integrally connected, the main body have upper surface and lower face, and the lower face is abutted with the end face of valve guide bushing, the upper surface
Equipped with annular incision, the ring spring is embedded in annular incision, and main body is divided into sealing by annular incision close to inboard portion
Lip, the seal lip are close to the engine air valve rod of peripheral hardware under the action of ring spring, machine oil are avoided to pass through valve stem
Enter combusted cylinder with the gap of valve guide bushing.
Further, the section of the ring spring is V-shaped or O-shaped.
Further, the polytetrafluoroethylene (PTFE) valve oil seal structure further includes clamp spring, and the clamp spring is located on the outside of socket part simultaneously
With the common pinch seal body of valve guide bushing.
Further, the socket part is equipped with the ripple of increase friction coefficient with engine valve guide contact surface.
The traditional oil enveloping structure for sealing main lip lateral surface, polytetrafluoro disclosed in the utility model are arranged on compared to spring
Ethylene valve oil seal structure has the annular incision for being arranged on top, and main body is made to mark off the interior sealing lip of thinner thickness,
Again by the ring spring banding interior sealing lip in embedded annular incision, oil enveloping structure is realized.Due to seal entirety
For Teflon member, the bonding of polytetrafluoroethylene (PTFE) and rubber component is avoided, and passes through physical arrangement stationary annular spring,
The elasticity that deformation stretches is provided for it using ring spring, it is whole the characteristics of using polytetrafluoroethylene (PTFE) high temperature resistant, low-friction coefficient
Polytetrafluoroethylene (PTFE) structure avoids the shortcomings that common rubber is easy to aging, easy to wear, and the valve oil seal of service life length is effectively made
Structure.
Seal lip forms two angles up and down relative to valve stem, passes through spring force and upper and lower two angles
The combination of different angle can regulate and control the dredge oil amount of lip, to meet the normal lubrication between valve stem and valve collar, and not
Enter combusted cylinder as there is excessive machine oil.
The polytetrafluoroethylene (PTFE) includes the modified symbol of pure polyflon and main component for polyflon
Condensation material.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is the part of the embodiment of the utility model rather than complete
Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it
His designing scheme and attached drawing.
Fig. 1 is the structure diagram of the polytetrafluoroethylene (PTFE) valve oil seal structure.
Specific embodiment
The technique effect of the design of the utility model, concrete structure and generation is carried out below with reference to embodiment and attached drawing
It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is the part of the embodiment rather than whole embodiments of the utility model, the embodiment based on the utility model, the skill of this field
The other embodiment that art personnel are obtained without creative efforts belongs to the model of the utility model protection
It encloses.In addition, all connection/connection relations being previously mentioned in text, not singly refer to component and directly connect, and refer to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, to form more preferably coupling structure.Each technology in the invention is special
Sign, can be with combination of interactions under the premise of not conflicting conflict.
As shown in Figure 1, a kind of polytetrafluoroethylene (PTFE) valve oil seal structure, including seal and ring spring 3, the seal
It is socketed at the port of engine valve guide 1 of peripheral hardware, the seal generally Teflon member, including main body
21st, seal lip 24 and socket part 22, the socket part 22 surround and is close to the lateral wall of 1 near ports of valve guide bushing, described
The upper end of socket part 22 and 21 integrally connected of main body, the main body 21 have upper surface and a lower face, the lower face with
The end face of valve guide bushing 1 abuts, and the upper surface is equipped with annular incision 23, and the ring spring 3 is embedded in annular incision 23, ring
Main body 21 is divided into seal lip 24 by shape notch 23 close to inboard portion, and the seal lip 24 is in the effect of ring spring 3
Under be close to the engine air valve rod of peripheral hardware, machine oil is avoided to enter combusted cylinder by the gap of valve stem and valve guide bushing 1.It is described
Seal lip 24 forms two angles up and down relative to valve stem, passes through spring force and upper and lower two angle differences angle
The combination of degree can regulate and control the dredge oil amount of seal lip 24, to meet the normal lubrication between valve stem and valve collar 1, and not
Enter combusted cylinder as there is excessive draining.The seal generally Teflon member, solves polytetrafluoroethylene (PTFE)
The problem of being difficult to keep prolonged adhesion with other materials, also solves common rubber valve oil sealing and holds under engine high-temperature operating mode
The problem of failure easy to aging.Simultaneously by setting ring spring 3 in upper surface, it is logy to solve Teflon member
Problem.
Ring spring 3 can have variform, and such as traditional section is that round or inclined tab can realize technical solution
Purpose.But as further preferred embodiment, the section of the ring spring 3 is V-shaped.Section is the ring spring 3 of V-type
Annular incision 23 can be strutted, enough deformation spaces are provided for seal lip 24.
As further preferred embodiment, further include clamp spring 4, the clamp spring 4 be located at 22 outside of socket part and with gas
Door 1 common pinch seal body of conduit.
As further preferred embodiment, the valve guide bushing 1 is equipped with increase friction system with 22 contact surface of socket part
Several ripples.
The better embodiment of the utility model is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention
Type or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (4)
1. a kind of polytetrafluoroethylene (PTFE) valve oil seal structure, including seal and ring spring, the seal is socketed on peripheral hardware
At the port of engine valve guide, it is characterised in that：The seal generally Teflon member, including main body, close
Envelope lip and socket part, the socket part surround and are close to the lateral wall of valve guide bushing near ports, the upper end of the socket part
With the main body integrally connected, the main body has upper surface and lower face, and the lower face is abutted with the end face of valve guide bushing,
The upper surface is equipped with annular incision, and the ring spring is embedded in annular incision, and annular incision is by main body close to inboard portion
Seal lip is divided into, the seal lip is close to the engine air valve rod of peripheral hardware under the action of ring spring, avoids machine oil
Combusted cylinder is entered by the gap of valve stem and valve guide bushing.
2. polytetrafluoroethylene (PTFE) valve oil seal structure according to claim 1, it is characterised in that：The section of the ring spring
It is V-shaped or O-shaped.
3. polytetrafluoroethylene (PTFE) valve oil seal structure according to claim 1, it is characterised in that：Further include clamp spring, the card
Spring be located on the outside of socket part and with the common pinch seal body of valve guide bushing.
4. according to claims 1 to 3 any one of them polytetrafluoroethylene (PTFE) valve oil seal structure, it is characterised in that：The socket
Portion is equipped with the ripple of increase friction coefficient with engine valve guide contact surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721632677.2U CN207568672U (en) | 2017-11-29 | 2017-11-29 | A kind of polytetrafluoroethylene (PTFE) valve oil seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721632677.2U CN207568672U (en) | 2017-11-29 | 2017-11-29 | A kind of polytetrafluoroethylene (PTFE) valve oil seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207568672U true CN207568672U (en) | 2018-07-03 |
Family
ID=62689052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721632677.2U Active CN207568672U (en) | 2017-11-29 | 2017-11-29 | A kind of polytetrafluoroethylene (PTFE) valve oil seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207568672U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306883A (en) * | 2018-12-10 | 2019-02-05 | 广西玉柴机器股份有限公司 | The seal valve stem structure of included limit |
-
2017
- 2017-11-29 CN CN201721632677.2U patent/CN207568672U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306883A (en) * | 2018-12-10 | 2019-02-05 | 广西玉柴机器股份有限公司 | The seal valve stem structure of included limit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101317029B (en) | Lip type seal | |
| CN105626870B (en) | It is a kind of can two way seal rotary seal structure | |
| EP1892444B1 (en) | Lip type seal | |
| CN207568672U (en) | A kind of polytetrafluoroethylene (PTFE) valve oil seal structure | |
| CN203857047U (en) | Seal structure for piston rod of oil cylinder | |
| CN204459168U (en) | The general plug sealing ring of a kind of combination | |
| CN100590330C (en) | Tracing floating type oil gear | |
| CN209654442U (en) | Electric stabilizing system bearing sealed ring | |
| CN208967038U (en) | Screw-down valve High pressure rotary structure | |
| CN205330854U (en) | Common rail injector and sealing device thereof | |
| CN208348501U (en) | A kind of sealing element for pipe fitting connection | |
| CN208764451U (en) | A kind of throttle valve stem sealing structure | |
| CN208041125U (en) | Motorcycle, fuel pump and its sealing diaphragm | |
| CN203383870U (en) | High-temperature-resistant and high-pressure-resistant turbocharging valve oil seal high in abrasion resistance | |
| CN206513820U (en) | Anti-twisted piston ring | |
| CN212509485U (en) | Lubricated type special-shaped sealing element based on strong sealing | |
| CN1185554A (en) | Sealing washer | |
| CN102996809A (en) | Y-type sealing ring | |
| CN218152496U (en) | Novel five-valve-group structure | |
| CN101737316A (en) | Piston with compound piston ring | |
| CN2720198Y (en) | Rubber-plastic composite lip-shaped sealing ring of rotating shaft | |
| CN112735703B (en) | High-pressure-resistant damping rubber sleeve | |
| CN205715652U (en) | Internal combustion engine sealing ring | |
| CN211901570U (en) | Pneumatic rubber seal of long service life's high strength | |
| CN209414620U (en) | A kind of piston seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |