CN217271891U - Dustproof sealing ring for multi-stage cylinder - Google Patents
Dustproof sealing ring for multi-stage cylinder Download PDFInfo
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- CN217271891U CN217271891U CN202220977571.0U CN202220977571U CN217271891U CN 217271891 U CN217271891 U CN 217271891U CN 202220977571 U CN202220977571 U CN 202220977571U CN 217271891 U CN217271891 U CN 217271891U
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Abstract
The utility model discloses a multistage dirt proof seal circle for jar, it includes annular sealed main part, sealed main part is provided with and is sealed main lip with the piston rod outer wall, the inner circle of sealed main part is provided with a plurality ofly along its circumference and is clearance fit's boss with the piston rod outer wall, the boss outer wall is the circular arc. One side of the main lip, which faces the piston rod, is provided with a storage groove which is sunken towards the direction deviating from the central axis of the sealing main body. The friction reducing oil film has the effects of reducing friction and reducing oil film breakage, thereby causing dry friction.
Description
Technical Field
The application relates to the field of sealing elements, in particular to a dustproof sealing ring for a multi-stage cylinder.
Background
The multi-stage cylinder dustproof sealing piece has the main function of preventing dust, dirt, sand and metal dust from entering. Through special design, prevent scratch piston rod, protection uide bushing part, extension sealing member working life. The external boss is designed in an interference manner, so that sundries and water vapor are prevented from entering the groove, and the device is particularly suitable for the environment polluted by wet heavy objects. The grooves for mounting the seal are typically open, semi-closed and closed.
The material of the traditional dust ring scheme product adopts SHA95 degree polyurethane, the total height of the product is 0.2mm less than the width of the groove, an auxiliary lip structure is adopted, although the design idea of preventing water vapor or other pollutants from entering the oil cylinder from the outer diameter direction of the dust ring is provided, the contact area of the auxiliary lip and the piston rod is increased, so that the friction is increased, and the service life is shortened. There is a need in this case for a low friction structural design that reduces oil film break down leading to dry friction.
SUMMERY OF THE UTILITY MODEL
In order to reduce friction and reduce oil film breakage, the application provides a dustproof sealing ring for a multi-stage cylinder.
The application provides a multistage dustproof sealing ring for jar adopts following technical scheme:
the utility model provides a multistage dustproof sealing ring for jar, includes annular sealed main part, sealed main part is provided with and is sealed main lip with the piston rod outer wall, sealed main part's inner circle is provided with a plurality ofly along its circumference and is clearance fit's boss with the piston rod outer wall, the boss outer wall is the circular arc.
Optionally, one side of the main lip, which faces the piston rod, is provided with a storage groove which is sunken towards the direction deviating from the central axis of the sealing main body.
Optionally, the main lip is integrally formed on an end surface of the sealing main body facing the outside, and the main lip extends towards the central axis of the sealing main body and away from the inner end surface of the sealing main body.
Optionally, the end face of the sealing body facing the outside is integrally formed with a secondary lip sealed to the side wall of the mounting groove.
Optionally, the end surface of the sealing main body facing to the outside is positioned on one side of the main lip, which deviates from the central axis of the sealing main body, and an inner concave ring groove is formed.
Optionally, a deformation ring groove is formed between the main lip and the boss on the inner ring of the sealing main body.
Optionally, the inner end surface of the sealing main body, which faces away from the outside, is integrally formed with two abutting portions for abutting against the bottom wall of the groove, and an annular groove is formed between the two abutting portions.
Optionally, both of said abutments have an abutment plane for abutment with the bottom wall of the channel.
Optionally, the sealing body is a polyurethane sealing body made of high hardness polyurethane.
In summary, the present application includes at least one of the following beneficial technical effects:
one is as follows: the main lip and the concave ring groove on the end face of the sealing main body are utilized, so that the sealing performance between the main lip and the piston rod can be ensured, the following performance of the main lip is improved, and meanwhile, the inward storage groove of the main lip is combined, so that a residual oil film can be stored, and the effect of reducing friction is achieved;
the second step is as follows: the boss with the arc-shaped inner ring of the sealing main body is utilized, so that the holding rod on the side, away from the outside, of the inner ring of the sealing main body has a larger gap and a small contact area, and the friction force is reduced;
and thirdly: the auxiliary lip which is in sealing fit with the side wall of the mounting groove can prevent water vapor or other pollutants from entering the groove from the outer diameter direction of the sealing main body;
fourthly, the method comprises the following steps: the polyurethane sealing body made of high-hardness polyurethane has good wear resistance, good low-temperature resistance and high-quality hydrolysis resistance, and the service life of a sealing system is prolonged;
and fifthly: utilize butt portion, can promote the stability of sealing main part in the slot, also help letting out the backpressure that system fluid gathering leads to, reduce the frictional force of sealing main part bottom simultaneously.
Drawings
Fig. 1 is a sectional view of a dustproof seal ring for a multistage cylinder according to an embodiment of the present disclosure.
Fig. 2 is a sectional view of a multistage cylinder dust seal disclosed in an embodiment of the present application.
Description of reference numerals: 1. a sealing body; 2. an outer diameter; 3. the intermediate diameter; 4. a main lip; 41. a storage tank; 6. a boss; 7. a deformation groove; 8. the minor lip; 9. an inner concave ring groove; 10. an abutting portion; 11. an annular groove.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses multistage for jar dust seal circle.
Referring to fig. 1, a multistage cylinder dust seal includes a ring-shaped seal body 1, the seal body 1 is installed in a groove of a cylinder body, the groove body in this embodiment is a half groove, the half groove has an outer diameter 2 with a larger diameter, and a middle diameter 3 with a smaller diameter is provided on a side close to the outside, and the seal body 1 is installed in the groove.
The outer terminal surface of sealing body 1 is close to the position integrated into one piece of inner circle has and is sealed main lip 4 with the piston rod outer wall, and main lip 4 extends towards sealing body 1 axis and the interior terminal surface direction that deviates from sealing body 1, and then main lip 4 is the slope for sealing body 1's axis, and main lip 4 reduces gradually along the outer terminal surface toward the distance between outer direction and the sealing body 1 axis, and main lip 4 is close to the outer wall interference fit of outside one end and piston rod.
The main lip 4 is seted up towards piston rod one side toward the sunken holding tank 41 of 1 axis direction of deviating from of sealed main part, and the cross-section of holding tank 41 is the indent circular arc, can store the surplus oil film.
Referring to fig. 1 and 2, the inner ring of the sealing main body 1 and the side wall far away from the outside are provided with a plurality of bosses 6 which are in clearance fit with the outer wall of the piston rod along the circumferential direction, and the outer wall of each boss 6 is in an arc shape, so that the root of the sealing main body 1 has a larger holding rod clearance, the contact area is reduced, and the friction force is reduced. An annular deformation groove 7 is formed between the main lip 4 and the boss 6 on the inner ring of the sealing main body 1, and the deformation groove 7 is recessed towards the direction of the central axis departing from the sealing main body 1.
The end face of the sealing main body 1 facing the outside is integrally formed with an auxiliary lip 8 sealed on the side wall of the middle diameter 3 of the mounting groove, the outer end face of the sealing main body 1 is in sealing butt joint with the top wall of the groove, the outer ring of the sealing main body 1 is in sealing butt joint with the side wall of the outer diameter 2 of the groove, and water vapor or other pollutants can be prevented from entering the groove from the direction of the outer diameter 2 of the dust ring. The minor lip 8 extends a lesser length than the major lip 4.
One side of the sealing main body 1 facing the outside is positioned between the auxiliary lip 8 and the main lip 4, and is provided with a concave ring groove 9 which is concave downwards, and the bottom of the concave ring groove 9 is arc-shaped when being seen from the cross section, so that the following performance of the main lip 4 can be improved.
The bottom end face integrated into one piece that sealed main part 1 deviates from the outside has two butt portions 10 that are used for with the butt of slot diapire, is formed with annular groove 11 between two butt portions 10 to two butt portions 10 all have be used for with the butt plane of slot diapire butt, have strengthened the stability of sealed main part 1 in the slot, also help letting out the backpressure that system fluid gathering leads to, reduce root frictional force simultaneously.
The seal body 1, the main lip 4, the sub lip 8, and the abutting portion 10 are all polyurethane seals made of high hardness polyurethane.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a multistage for jar dust seal circle which characterized in that: including annular sealing body (1), sealing body (1) is provided with and is sealed main lip (4) with the piston rod outer wall, the inner circle of sealing body (1) is provided with a plurality of bosss (6) that are clearance fit with the piston rod outer wall along its circumference, boss (6) outer wall is the circular arc.
2. The dustproof seal ring for a multistage cylinder according to claim 1, wherein: the main lip (4) is provided with a storage groove (41) which is sunken towards the direction of the central axis of the sealing main body (1) and faces away from one side of the piston rod.
3. The dustproof seal ring for a multistage cylinder according to claim 1, wherein: main lip (4) integrated into one piece is in sealing body (1) terminal surface towards the outside, main lip (4) extend towards sealing body (1) axis and the interior terminal surface direction that deviates from sealing body (1).
4. The dustproof seal ring for a multistage cylinder according to claim 1, wherein: and a secondary lip (8) sealed on the side wall of the mounting groove is integrally formed on the end face of the sealing main body (1) facing the outside.
5. The dustproof seal ring for a multistage cylinder according to claim 1, wherein: the end face of the sealing main body (1) facing the outside is located on one side, deviating from the central axis of the sealing main body (1), of the main lip (4), and an inner concave ring groove (9) is formed in the side.
6. The dustproof seal ring for a multistage cylinder according to claim 1, wherein: a deformation groove (7) is formed between the main lip (4) and the boss (6) on the inner ring of the sealing main body (1).
7. The dustproof seal ring for a multistage cylinder according to claim 1, wherein: the sealing main body (1) deviates from the inner end face of the outside and is integrally formed with two abutting parts (10) used for abutting against the bottom wall of the groove, and an annular groove (11) is formed between the two abutting parts (10).
8. The dustproof seal ring for a multistage cylinder according to claim 7, wherein: both of said abutments (10) have an abutment plane for abutment with the bottom wall of the groove.
9. The dustproof seal ring for a multistage cylinder according to claim 1, wherein: the sealing main body (1) is a polyurethane sealing body made of high-hardness polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220977571.0U CN217271891U (en) | 2022-04-26 | 2022-04-26 | Dustproof sealing ring for multi-stage cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220977571.0U CN217271891U (en) | 2022-04-26 | 2022-04-26 | Dustproof sealing ring for multi-stage cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217271891U true CN217271891U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220977571.0U Active CN217271891U (en) | 2022-04-26 | 2022-04-26 | Dustproof sealing ring for multi-stage cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217271891U (en) |
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2022
- 2022-04-26 CN CN202220977571.0U patent/CN217271891U/en active Active
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