CN206972915U - Piston rod seals - Google Patents
Piston rod seals Download PDFInfo
- Publication number
- CN206972915U CN206972915U CN201720947674.1U CN201720947674U CN206972915U CN 206972915 U CN206972915 U CN 206972915U CN 201720947674 U CN201720947674 U CN 201720947674U CN 206972915 U CN206972915 U CN 206972915U
- Authority
- CN
- China
- Prior art keywords
- circle body
- piston rod
- boss
- raised line
- rod seals
- 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
Abstract
The utility model discloses a kind of piston rod seals, includes the circle body of annular, first boss and second boss are provided with the external diameter surface of circle body, is formed fluted between first boss and second boss, and raised line is provided with the inside diameter surface of circle body.When in the mounting groove that circle body is installed to the cylinder cap coordinated with piston rod, first boss and second boss contact with installation groove face, circle body stably can be embedded in mounting groove, when piston rod moves reciprocatingly relative to circle body, circle body will not roll in mounting groove with the reciprocating motion of piston rod, rotate, circle body it is buckling good, circle body because piston rod move back and forth caused by fretting wear it is few, service life length；Simultaneously, because the external diameter surface of circle body sets first boss and the inside diameter surface of second boss and circle body to set raised line, when circle body is squeezed, extruding force suffered by raised line is decomposed into first boss and the extruding force suffered by second boss, enable the crush resistance of circle body good, under stress stable work in work.
Description
Technical field
It the utility model is related to technical field of sealing technology, and in particular to a kind of piston rod seals.
Background technology
Sealing ring is the conventional parts of plant equipment, the solid of the adjacent space for preventing element of installation, liquid and/
The mutual flowing of gas, play a part of completely cutting off adjacent space.
Conventional sealing ring is O-ring, and it is widely used in hydraulic pressure and pneumatic actuator system, be mainly used in static seal and
Reciprocating movement sealing.But when O-ring is used for reciprocating movement sealing, such as during sealing for piston or piston rod, easily
With the reciprocating motion rolling in the trench of piston or piston rod, O-ring easily fails because of fretting wear.
Utility model content
According to one side of the present utility model, there is provided piston rod seals, include the circle body of annular, circle body it is outer
First boss and second boss are provided with the surface of footpath, fluted, the internal diameter of circle body is formed between first boss and second boss
Raised line is provided with surface.When in the mounting groove that circle body is installed to the cylinder cap coordinated with piston rod, first boss and second convex
Platform is contacted with installation groove face, and circle body stably can be embedded in mounting groove, when piston rod moves reciprocatingly relative to circle body, circle
Body will not roll with the reciprocating motion of piston rod and in mounting groove, rotate, circle body it is buckling good, circle body is past because of piston rod
Fretting wear caused by multiple motion is few, service life length；Simultaneously as the external diameter surface of circle body sets first boss and second convex
The inside diameter surface of platform and circle body sets raised line, and when circle body is squeezed, the extruding force suffered by raised line is decomposed into first boss and the
Extruding force suffered by two boss, enable the crush resistance of circle body good, under stress stable work in work.
In some embodiments, raised line be extend from the inside diameter surface of circle body from its both ends to middle part and formed it is prominent
Rise.Thus, when circle body assembles with piston rod, raised line forms angle with piston rod, and the angle formed moves back and forth in piston rod
When play the guiding role, so as to reduce reciprocating resistance of the raised line to piston rod.
In some embodiments, the thickness of the radial direction thinnest part of circle body is more than the height of raised line.Thus, piston rod packing
During circle extruding installation, raised line can first deform than the entirety of piston rod seals, ensure the sealing effectiveness of piston rod seals.
In some embodiments, the neighboring of first boss and second boss is provided with clear angle.Thus, when by circle body
When being installed in mounting groove, clear angle can play the guiding role, and be easy to the installation of circle body；Meanwhile clear angle can make first boss and
Second boss is more stably bonded with installation groove face.
In some embodiments, the height of the longitudinal cross-section of circle body is more than the width of the longitudinal cross-section of circle body.Due to circle
The height of the longitudinal cross-section of body is more than the width of the longitudinal cross-section of circle body, when past with axial direction of the piston rod that circle body coordinates along circle body
When moving again, circle body is not easy to overturn because of the reciprocating motion of piston rod.
In some embodiments, groove is deep-slotted chip breaker.Thus, for circle body when extruding installation, groove can absorb extruding
Power, improve the crush resistance energy of circle body；Meanwhile groove is deep-slotted chip breaker, circle body in a compressed state, is not easy because stress concentration is opened
Split, circle body under stress being capable of steady operation.
In some embodiments, the longitudinal section shape of raised line is zigzag, and zigzag tooth form angle is obtuse angle.
Due to piston rod seals extrude install when, piston rod seals under conditions of identical amount of compression, piston rod seals with
The contact area of the piston rod of cooperation is bigger, and sealing effectiveness is better, therefore, when angle is arranged to obtuse angle, is extruded in identical
Under conditions of amount, raised line is squeezed produce elastic deformation after, the contact area of itself and the piston rod of cooperation can be bigger, so that close
It is more preferable to seal effect.
In some embodiments, the cross sectional shape of raised line is arc.Thus, piston rod move back and forth when, arcwall face with
Piston rod is linear contact lay, and contact area is small to make frictional force small, so as to reduce reciprocating resistance of the circle body to piston rod.
In some embodiments, piston rod seals are formed in one.Thus, piston rod seals installation is simple, close
It is good to seal effect.
In some embodiments, piston rod seals are made up of elastomeric material.Thus, piston rod seals extruding installation
The contact surface increase of Shi Fasheng elastic deformations, piston rod seals and piston rod, good sealing effect.
Brief description of the drawings
Fig. 1 is the structural representation of the piston rod seals of the embodiment of the utility model one；
Fig. 2 is the Section A-A schematic diagram of piston rod seals shown in Fig. 1；
Fig. 3 is close-up schematic view at the B of piston rod seals shown in Fig. 2；
Fig. 4 is the close-up schematic view of the installation of piston rod seals shown in Fig. 3；
Fig. 5 is close-up schematic view at the E of piston rod seals shown in Fig. 1.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 to Fig. 5 is schematically showed according to a kind of piston rod seals of embodiment of the present utility model, the work
Rod seal circle includes the circle body 100 of annular.
As shown in figure 1, first boss 103 and second boss 104, first boss are provided with the external diameter surface of circle body 100
103 and second boss 104 be separately positioned on circle body 100 external diameter surface both ends, first boss 103 and second boss 104 it
Between form groove 102, be provided with raised line 101, groove 102, first boss 103 and second boss on the inside diameter surface of circle body 100
104 are set circlewise along the external diameter surface of circle body 100, and inside diameter surface of the raised line 101 along circle body 100 is set circlewise.Such as Fig. 4 institutes
Show, when piston rod seals and the assembling of piston rod 200, circle body 100 is arranged on to the cylinder cap coordinated with piston rod 200 first
In 300 mounting groove, circle body 100 coordinates with mounting groove gap, and the external diameter surface of circle body 100 contacts with the bottom land of mounting groove, pacifies
The width that the groove depth of tankage is less than the longitudinal cross-section of circle body 100 (is the radial direction of the longitudinal cross-section of circle body 100 as shown in Figure 3
The thickness D1 in thickness).Preferably, the groove depth of mounting groove is more than the half of the width of the longitudinal cross-section of circle body 100 and less than circle
The width of the longitudinal cross-section of body 100 subtracts the height of raised line 101 (as shown in figure 3,1/2D1<The groove depth of mounting groove<D2=D1-
H2, wherein, the height of raised line 101 for the longitudinal cross-section of circle body 100 the minimum point of raised line 101 in the radial direction and peak
Difference in height, i.e., the H2 shown in Fig. 3).In specifically used, when cylinder cap 300 and the cooperation of piston rod 200, cylinder cap 300 and piston rod
200 gaps coordinate, and circle body 100 is interference fitted with piston rod 200, and the inside diameter surface and external diameter surface of circle body 100 are squeezed, raised line
101st, first boss 103 and second boss 104 produce elastic deformation so that circle body 100 by piston rod 200 and cylinder cap 300,
The cavity sealing that cylinder body and piston surround.
Preferably, the raised line 101 for being arranged on the inside diameter surface of circle body 100 is that portion extends thereto from the both ends of inside diameter surface
And the projection formed.
As shown in Fig. 1 and Fig. 3 to Fig. 5, groove 102 is arranged to deep-slotted chip breaker.Specifically, indulging from the circle body 100 shown in Fig. 3
Into section as can be seen that deep-slotted chip breaker is provided with circular arc R 2, the depth of circular arc is H1, and circular arc depth H 1 is less than the height of raised line 101
H2 is spent, so, circle body 100 is when extruding installation, under deep-slotted chip breaker pressured state, is not easy because stress concentration ftractures, circle body 100 exists
Being capable of steady operation under pressure condition.In other embodiments, the shape of groove 102 can also select rectangular channel, dovetail groove or V
Shape groove (not shown).When piston rod 200 moves back and forth, with cylinder body 300 trickle relative motion occurs for circle body 100, encloses
Sliding friction occurs for the bottom land of the external diameter surface of body 100 and the mounting groove of cylinder body 300, and the external diameter surface of circle body 100 sets groove
102 can store chip caused by friction, ensure the cleaning of the external diameter surface of circle body 100 and mounting groove bottom land contact surface, ensure close
Seal effect.
Preferably, as shown in Figures 2 to 4, the longitudinal section shape of raised line 101 is zigzag, and tooth form is symmetrical, tooth form angle
(as shown in figure 3, angle C between two sides of composition tooth form) is more than 90 °, and preferably angular range is 120 ° -150 °.Further
Ground, fillet R1 can be set on the top of tooth form.In another embodiment, the longitudinal section shape of raised line 101 can be trapezoidal
(not shown), it is preferably isosceles trapezoid, and the angular range for forming trapezoidal two waist is 120 ° -150 °.In another embodiment
In, the longitudinal section shape of raised line 101 can also be arc (not shown).It is above-mentioned be only raised line 101 some are specific
Embodiment, as long as raised line 101 is all of the present utility model from the both ends of the inside diameter surface of circle body 100 to central raised shape
Protection domain, it can reduce reciprocating resistance of the circle body 100 to piston rod.
Preferably, as shown in Fig. 1, Fig. 3 and Fig. 5, the neighboring of first boss 103 and second boss 104 is provided with clearly
Angle, clear angle are C2 as depicted, and C2 size range can select 0.2-2.0, and C2 angular range can select 30-60 °,
Clear angle can play the guiding role, and be easy to the installation of circle body 100；Meanwhile clear angle can make first boss 103 and second boss 104
More stably it is bonded with installation groove face.
Preferably, as shown in figure 3, thickness (the i.e. radial direction of the longitudinal cross-section of circle body 100 of the radial direction thinnest part of circle body 100
Most thin-walled is thick, as shown in figure 3, convex to first to the distance D1-H1 at the top of raised line 101 or the bottom of raised line 101 for the bottom of groove 102
Platform 103 or the distance D2 on the surface of second boss 104) it is more than the height H2, i.e. D2 of raised line 101>H2 or D1-H1>H2.
Preferably, as shown in figure 3, height (the i.e. axial direction length of the longitudinal cross-section of circle body 100 of the longitudinal cross-section of circle body 100
Spend L) be more than circle body 100 longitudinal cross-section width (i.e. the thickness D1 in the radial direction thickness of the longitudinal cross-section of circle body 100), i.e. D1
<L.Meanwhile the upper and lower bottom surface of circle body 100 is the plane of annular, the external diameter surface of circle body 100 and the upper and lower bottom of circle body 100
Face is vertical, and the cross sectional shape of mounting groove is rectangle.When piston rod 200 moves back and forth, due to the circle body of the piston rod seals
100 upper and lower bottom surface is vertical with the external diameter surface of circle body 100, installs the section shape of the mounting groove of the cylinder cap 300 of the circle body 100
Shape is rectangle and coordinated with the gap of circle body 100 that therefore, circle body 100 will not be with the reciprocating motion of piston rod 200 and in mounting groove
Rolling, rotate, service life will not be reduced because rolling friction is worn.
For example, in certain embodiments, as illustrated, the D1 of circle body 100 selects 11.6, D2 to select 9, H1 selections 1.8, L
Selection 12, due to L>D1, when circle body 100 is installed in the mounting groove of cylinder cap 300, preferentially with the external diameter surface and peace of circle body 100
The bottom land contact of tankage；When cylinder cap 300 and piston rod 200 assemble, the extrusion of circle body 100, due to D1-D2<D2 or D1-
D2<D1-H1, now raised line 101 preferentially deform；Because the angle C of raised line 101 is obtuse angle, such as 130 °, when raised line 101 produces
During elastic deformation, increase with the contact area of the bottom land of the mounting groove of piston rod 200, sealing effectiveness is stable；Form raised line 101
The intersection of two planes sets the fillet that fillet R1, R1 selection radius is 1.92, during reciprocating motion of the pistons, fillet R1 can pair
To guiding；The circular arc R 2 of groove 102 selects radius, and for 3.86 circular arc, circular arc depth H 1 is 1.86, when groove 102 is arranged on circle
During the middle part of the external diameter surface of body 100, the length of straigh line at the both ends of the groove 102 of the outer surface of circle body 100 is 2.7, now,
The contact area of the outer surface of circle body 100 and the bottom land of mounting groove is small, and during reciprocating motion of the pistons, circle body 100 produces because of friction
Raw abrasion is reduced, and the service life of circle body 100 extends；The neighboring of first boss 103 and second boss 104 is set clear
Angle C2 selects 0.8 × 45 °, and when circle body 100 is installed in mounting groove, clear angle C2 can play the guiding role, and make the peace of circle body 100
Dress is more convenient.Explanation is needed exist for, that above-mentioned size does not indicate unit is all mm.
Preferably, raised line 101, groove 102, fillet R1 and clear angle C2 are molded directly within circle body by integrally formed mode
On 100, you can so that by mould straight forming, machining raised line 101, groove 102, circle on circle body 100 can also be passed through
Angle R1 and clear angle C2 form, obtain the integral piston rod packing with raised line 101, groove 102, fillet R1 and clear angle C2
Circle.
Preferably, piston rod seals are made up of elastomeric material.Conventional material is polyurethane material, such as conventional poly-
Urethane, high temperature resistant hydrolization of polyurethane, Low temperature-resistanpolyurethane polyurethane, self-lubricating polyurethane and food service industry polyurethane, different materials pair
Different colours are answered to be applicable different use environments, operator can distinguish the piston rod seals of unlike material according to color, and
Choose the piston rod seals of suitable material for use environment, -50 DEG C to 110 DEG C of temperature in use, working speed 0.4m/s, one
As can bear 40MPa operating pressure.
Above-described is only some embodiments of the present utility model.For the person of ordinary skill of the art,
On the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these belong to this practicality
New protection domain.
Claims (10)
1. piston rod seals, it is characterised in that the circle body (100) including annular, on the external diameter surface of the circle body (100)
Be provided with first boss (103) and second boss (104), between the first boss (103) and second boss (104) formed with
Groove (102), raised line (101) is provided with the inside diameter surface of the circle body (100).
2. piston rod seals according to claim 1, it is characterised in that the raised line (101) is by circle body (100)
Inside diameter surface extends from its both ends to middle part and formed raised.
3. piston rod seals according to claim 1, it is characterised in that the radial direction thinnest part of the circle body (100)
Thickness is more than the height of the raised line (101).
4. piston rod seals according to claim 1, it is characterised in that the first boss (103) and second boss
(104) neighboring is provided with clear angle.
5. piston rod seals according to claim 1, it is characterised in that the height of the longitudinal cross-section of the circle body (100)
Width of the degree more than the longitudinal cross-section of the circle body (100).
6. piston rod seals according to claim 1, it is characterised in that the groove (102) is deep-slotted chip breaker.
7. piston rod seals according to claim 1, it is characterised in that the longitudinal section shape of the raised line (101)
For zigzag, and the zigzag tooth form angle is obtuse angle.
8. piston rod seals according to claim 1, it is characterised in that the longitudinal section shape of the raised line (101)
For arc.
9. according to the piston rod seals described in claim 1-8 any one, it is characterised in that the piston rod seals are
It is integrally formed.
10. according to the piston rod seals described in claim 1-8 any one, it is characterised in that the piston rod seals
It is made up of elastomeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720947674.1U CN206972915U (en) | 2017-07-31 | 2017-07-31 | Piston rod seals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720947674.1U CN206972915U (en) | 2017-07-31 | 2017-07-31 | Piston rod seals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206972915U true CN206972915U (en) | 2018-02-06 |
Family
ID=61393783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720947674.1U Active CN206972915U (en) | 2017-07-31 | 2017-07-31 | Piston rod seals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206972915U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757370A (en) * | 2021-09-17 | 2021-12-07 | 日照海卓液压有限公司 | U-shaped low-damping sealing ring for dual-purpose hole |
| CN114320163A (en) * | 2022-03-14 | 2022-04-12 | 西南石油大学 | Sealing element for roller bit and roller bit |
-
2017
- 2017-07-31 CN CN201720947674.1U patent/CN206972915U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757370A (en) * | 2021-09-17 | 2021-12-07 | 日照海卓液压有限公司 | U-shaped low-damping sealing ring for dual-purpose hole |
| CN114320163A (en) * | 2022-03-14 | 2022-04-12 | 西南石油大学 | Sealing element for roller bit and roller bit |
| CN114320163B (en) * | 2022-03-14 | 2022-05-10 | 西南石油大学 | Sealing element for roller bit and roller bit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0730713B1 (en) | Sealing assembly | |
| EP1431633B1 (en) | Lip seal having increased contact force at interface and apparatus incorporating the same | |
| CN102278479A (en) | Y-shaped sealing unit | |
| CN206972915U (en) | Piston rod seals | |
| CN202203415U (en) | Sealing unit and sealing device comprising the same | |
| CN204201078U (en) | A kind of y-type seal ring | |
| CN202418586U (en) | Lip-shaped sealing ring | |
| CN201277219Y (en) | Multi-stage dust sealing hydraulic oil cylinder | |
| CN2497113Y (en) | Lip-shape sealing ring | |
| CN207195648U (en) | Combined seal ring | |
| CN205503989U (en) | Hydro -cylinder compensation formula sliding seal structure | |
| CN212564387U (en) | Piston sealing structure and sealing piece for hydraulic oscillator | |
| CN208719364U (en) | A kind of oiling abrasion resistant type valve group | |
| CN202144812U (en) | Hydraulic oil cylinder with dustproof cover | |
| CN111237466A (en) | Double-ring lip-shaped sealing ring and fluid valve sealing structure | |
| CN105673763A (en) | Inflatable type damper guider sealing structure | |
| CN101482180A (en) | Multi-n shaped combined sealing device | |
| CN212337609U (en) | High-pressure grouting pump hydraulic end with linear bearing | |
| CN208703125U (en) | A kind of shock absorbing sealing element | |
| CN218439553U (en) | Piston ring of automobile engine | |
| CN206972911U (en) | Two-way sealing ring | |
| CN216843079U (en) | Packing-shaped sealing ring | |
| CN212356376U (en) | Hydraulic jack | |
| CN217559063U (en) | Electromagnetic valve rod sealing ring structure | |
| CN203847475U (en) | High-pressure double-acting self-compensating and thin-wall hydraulic cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |