CN207728882U - A kind of sealing device of hydraulic cylinder piston rod - Google Patents
A kind of sealing device of hydraulic cylinder piston rod Download PDFInfo
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- CN207728882U CN207728882U CN201721855347.XU CN201721855347U CN207728882U CN 207728882 U CN207728882 U CN 207728882U CN 201721855347 U CN201721855347 U CN 201721855347U CN 207728882 U CN207728882 U CN 207728882U
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- piston rod
- sealing
- mounting groove
- sealing lip
- oil
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Abstract
The utility model discloses a kind of sealing devices of hydraulic cylinder piston rod, sealing for oil cylinder guide sleeve inner piston rod, the inner wall of the guide sleeve is equipped with the first mounting groove, it is provided with primary seal circle in first mounting groove, the top of the primary seal circle is provided with oil groove, the oil inlet passage being connected to the piston rod is equipped between the oil groove and the first side wall of first mounting groove, so that the fluid in oil cylinder can enter in oil groove, the first sealing lip to offset with the slot bottom of first mounting groove is provided on the primary seal circle, the second sealing lip for offseting with the piston rod and the third sealing lip to offset with the first side wall of the mounting groove.So set, on the basis of the first sealing lip can realize sealing, third sealing lip is increased, dual-seal is realized；After the first sealing lip is damaged by slot bottom corrosion, third sealing lip effectively can play transfer sealing surface after the slot bottom corrosion of primary seal circle, play sealing function.
Description
Technical field
The utility model is related to field of sealing technology, more particularly, to a kind of sealing device of hydraulic cylinder piston rod.
Background technology
It is extraneous after repair cylinder seal currently on the market is because using undesirable dust seal or usage time long
Rainwater, silt enter inside oil cylinder guide sleeve through dustband, lead to corrosion between dustband and primary seal, to lead
Primary seal circle outer lip injury of mouth (or corrosion location forms oil leak channel) is caused, oil leak is caused.As Figure 1-Figure 2, outside primary seal
Lip 3 is placed in 112 range of slot bottom corrosion position, since slot bottom corrosion causes primary seal outer lip 3 to damage, primary seal outer lip 3 and is led
Channel is formed between the slot bottom 12 of set 2, to which corrosion position 112 and oil inlet passage 111 form oil leak channel, in oil groove 7
Oil flows to 5 position of dustband by oil leak channel, to flow out to outside guide sleeve 2.
Sealing currently on the market be all based on oil cylinder it is intact in the case of manufacture and design, in the case where oil cylinder is intact
It can realize good sealing effect, but there is a situation where foregoing description the phenomenon that (i.e. slot bottom corrosion), primary seal outer lip
It is placed in slot bottom corrosion position, cannot realize that good sealing or earlier period damage cause oil leak, if replacing oil cylinder guide sleeve component
It then needs to increase very big cost.
Therefore, how to realize it is above-mentioned can still reach good sealing in the case of slot bottom corrosion, become people from this field
Member needs the important technological problems solved.
Utility model content
The purpose of this utility model is to provide a kind of sealing devices of hydraulic cylinder piston rod, realize in slot bottom corrosion
In the case of, it can still reach good sealing.
The utility model lies in that providing a kind of sealing device of hydraulic cylinder piston rod, it to be used for oil cylinder guide sleeve inner piston rod
Sealing, the inner wall of the guide sleeve is equipped with the first mounting groove, is provided with primary seal circle in first mounting groove, the master is close
The top of seal is provided with oil groove, is equipped between the oil groove and the first side wall of first mounting groove and connects with the piston rod
Logical oil inlet passage is provided with and first installation so that the oil in oil cylinder can enter in oil groove on the primary seal circle
The first primary seal lip that the slot bottom of slot offsets, the second sealing lip to offset with the piston rod and with the mounting groove the
The third sealing lip that one side wall offsets.
Preferably, the primary seal circle, first sealing lip, second sealing lip and the third sealing lip are at one
Body structure.
Preferably, the third sealing lip is between first sealing lip and the oil groove, and the third seals
The internal face of lip and the oil groove forms c-type structure.
Preferably, root pair lip is additionally provided on the primary seal circle, the root pair lip setting is in second sealing
It the lower section of lip and offsets with the piston rod.
Preferably, it is provided with support ring between the primary seal circle and the second sidewall of first mounting groove.
Preferably, the inner wall of the guide sleeve is provided with the second mounting groove, and dustband is provided in second mounting groove,
The piston rod passes through the dustband.
Preferably, the inner wall of the guide sleeve is provided with third mounting groove, and it is close that buffering is provided in the third mounting groove
Seal, the piston rod pass through the cushion seal circle.
A kind of sealing device of hydraulic cylinder piston rod provided by the utility model is used for the guide sleeve inner piston rod of oil cylinder
Sealing, the inner wall of guide sleeve is equipped with the first mounting groove, and the first mounting groove is internally provided with primary seal circle, the top of primary seal circle
It is provided with oil groove, oil inlet passage is provided between oil groove and the first side wall of the first mounting groove, and oil groove is connected with piston rod
It is logical, so that oil when its work in oil cylinder is entered in oil groove, the first primary seal lip, second close is additionally provided on primary seal circle
Envelope lip and third sealing lip, the first sealing lip can mutually be pushed against with the slot bottom of the first mounting groove, and the second sealing lip can be with work
Stopper rod offsets, and third sealing lip can offset with the first side wall of the first mounting groove.When the slot bottom for being in the first mounting groove
Primary seal circle on the first sealing lip when being damaged by slot bottom corrosion, third sealing lip, which is in slot bottom, does not have the side of corrosion,
Oil in sealing oil groove is made it not leak by third sealing lip.So set, can realize the base of sealing in the first sealing lip
On plinth, third sealing lip is increased, dual-seal is realized；After the first sealing lip is damaged by slot bottom corrosion, third sealing
Lip effectively can play transfer sealing surface after the slot bottom corrosion of primary seal circle, play sealing function.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art does simple introduction, it should be apparent that, the accompanying drawings in the following description is only
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the sectional drawing of the primary seal of embodiment in the prior art；
Fig. 2 is the sectional drawing of the sealing device of the hydraulic cylinder piston rod of embodiment in the prior art；
Fig. 3 is the sectional drawing of the primary seal circle in the utility model embodiment；
Fig. 4 is the sectional drawing of the sealing device of the hydraulic cylinder piston rod in the utility model embodiment；
Fig. 5 is the structure of the first mounting groove of the sealing device of the hydraulic cylinder piston rod in the utility model embodiment
Figure.
In Fig. 1-Fig. 2：
111- oil inlet passages, 112- corrosions position, 1- primary seal circles, 2- guide sleeves, 3- primary seal outer lips, 4- cushion seals
Circle, 5- dustbands, 6- piston rods, 7- oil grooves；
In Fig. 3-Fig. 5：
1- primary seal circles, 2- guide sleeves, 3- support rings, 4- cushion seal circles, 5- dustbands, 6- piston rods, 7- first are close
Seal lip, the second sealing lips of 8-, the roots 9- pair lip, 10- oil grooves, 11- third sealing lips, the slot bottom of 12 first mounting grooves, 13- first
The first side wall of mounting groove, the second sidewall of the first mounting grooves of 14-.
Specific implementation mode
The utility model provides a kind of sealing device of hydraulic cylinder piston rod, realizes the slot bottom corrosion the case where
Under, it can still reach good sealing.
Hereinafter, being illustrated to embodiment with reference to attached drawing.In addition, embodiments illustrated below is not to recorded in claim
Utility model content rise restriction effect.In addition, the full content of the composition represented by following example is not limited to as power
Profit requires necessary to the solution of recorded utility model.
With reference to figure 3- Fig. 5, a kind of sealing device of hydraulic cylinder piston rod is used for 2 inner piston rod 6 of guide sleeve of oil cylinder
The inner wall of sealing, guide sleeve 2 is equipped with the first mounting groove, is provided with primary seal circle 1 in the first mounting groove, primary seal circle 1 is sleeved on work
The top of the outside of stopper rod 6, primary seal circle 1 is provided with oil groove 10, is set between oil groove 10 and the first side wall 13 of the first mounting groove
It is equipped with oil inlet passage, and oil groove 10 can be connected to piston rod 6；The first sealing lip 7, second is additionally provided on primary seal circle 1
Sealing lip 8 and third sealing lip 11, the first sealing lip 7 can mutually be pushed against with the slot bottom 12 of the first mounting groove, the second sealing lip 8
It can offset with piston rod 6, third sealing lip 11 can offset with the first side wall 13 of the first mounting groove.
It should be noted that the section of primary seal circle 1 can be the diversified forms such as U-shaped, Y types, matrix type, V-type.
When the first sealing lip 7 on the primary seal circle 1 of slot bottom 12 for being in the first mounting groove is due to the slot of the first mounting groove
12 corrosion of bottom and when damaging, third sealing lip 11, which is in the first mounting groove, does not have the side of corrosion, and third sealing lip 11 will be close
Fluid in oil sealing slot 10 makes it not leak.
So set, on the basis of the first sealing lip 7 can realize sealing, third sealing ring is increased, is realized double
Resealing；When the first sealing lip 7 by slot bottom corrosion after being damaged, third sealing lip 11 can be effectively in the slot of primary seal circle 1
Transfer sealing surface is played after the corrosion of bottom, plays sealing function.
In order to keep primary seal circle 1 more stable at work, it is not easy to shake, root pair lip 9, root is also set up on primary seal circle 1
Portion's pair lip 9 is arranged in the lower section of the second sealing lip 8, and root pair lip 9 can offset with piston rod 6.
In the present embodiment, above-mentioned primary seal circle 1, the first sealing lip 7, the second sealing lip 8 and third sealing lip 11 are integral
Change structure, strengthens leakproofness in this way.
Third sealing lip is similar trapezoidal protrusion, so set, both having strengthened the stabilization of primary seal circle 1 at work
Property, and facilitate installation, also enhance the leakproofness of third sealing lip 11.
It is according to the size for the first mounting groove being arranged in actual guide sleeve 2, master is close in the preferred embodiment of the present embodiment
11 axial height of third sealing lip of seal 1 increases, and the first side wall 13 of third sealing lip 11 and the first mounting groove is made to realize
It is full of cooperation；7 axial height of the first sealing lip of primary seal circle 1 is increased, is on the one hand unlikely to too high influence installation, on the other hand
Increase the gap that can highly reduce between the first side wall 13, turns over after preventing third sealing lip 11 to be pressurized；It is close by first
The spacing for sealing lip 7 and the second sealing lip 8 increases, and increases the lip interference volume of primary seal circle 1；The outer diameter of primary seal circle 1 is increased,
The outside and slot bottom for making primary seal circle 1 are interference fitted, and increase product stability.
It should be noted that above-mentioned interference fit subtracts each side of matched axis for the size in all directions in hole
Algebraic step obtained by upward size, this difference are interference fits when being negative.
In another preferred embodiment of the present embodiment, third sealing lip 11 between the first sealing lip 7 and oil groove 10, and
Third sealing lip 11 and the internal face of oil groove 10 form c-type structure.So set, work as primary seal circle 1 during the work time, oil pressure
The higher active force to third sealing lip 11 is bigger, and sealing performance is better.
In the present embodiment, support ring 3 is additionally provided in the first mounting groove, the setting of support ring 3 is pacified in primary seal circle 1 and first
Between the second sidewall 14 of tankage, for supporting primary seal circle 1.
In another preferred embodiment of the present embodiment, the inner wall of guide sleeve 2 is additionally provided with the second mounting groove and third mounting groove,
It is provided with dustband 5 in second mounting groove, piston rod 6 passes through dustband 5, for preventing external rainwater, dirt sand from entering the
Corrosion and destruction is caused to the slot bottom of primary seal circle 1 in one mounting groove；Cushion seal circle 4, piston rod 6 are provided in third mounting groove
Across cushion seal circle 4, during the work time, cushioning effect is played to system pressure.
Content is specifically described this exhibition rope device in conjunction with above-mentioned each embodiment below, a kind of hydraulic cylinder piston rod
Sealing device, the sealing of 2 inner piston rod 6 of guide sleeve for oil cylinder, the inner wall of guide sleeve 2 is provided with the first mounting groove, the
Two mounting grooves and third mounting groove, are provided with primary seal circle 1 in the first mounting groove, and the second of primary seal circle 1 and the first mounting groove
It is provided with support ring 3 between side wall 14, dustband 5 is provided in the second mounting groove, cushion seal is provided in third mounting groove
Circle 4.
The top of primary seal circle 1 is provided with oil groove 10, is provided between oil groove 10 and the first side wall 13 of the first mounting groove
Oil inlet passage, and can be connected to piston rod 6, the first sealing lip 7, the second sealing lip 8, are additionally provided on primary seal circle 1
Three sealing lips 11 and root pair lip 9, the first sealing lip 7 can offset with the slot bottom 12 of the first mounting groove；Second sealing lip, 8 energy
It is enough to offset with piston rod 6；Third sealing lip 11 can offset with the first side wall 13 of the first mounting groove；Root pair lip 9 is set
It sets in the lower section of the second sealing lip 8, can offset with piston rod 6；Primary seal circle 1 and the first sealing lip 7, the second sealing lip 8,
11 integralization structure of third sealing lip.
Third sealing lip 11 is between the first sealing lip 7 and oil groove 10, and third sealing lip 11 and oil groove 10 is interior
Wall surface forms c-type structure.
So set, realizing in the case of slot bottom corrosion, it can still reach good sealing.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (7)
1. a kind of sealing device of hydraulic cylinder piston rod is used for the sealing of oil cylinder guide sleeve (2) inner piston rod (6), feature
It is, the inner wall of the guide sleeve (2) is equipped with the first mounting groove, and primary seal circle (1) is provided in first mounting groove, described
The top of primary seal circle (1) is provided with oil groove (10), the first side wall (13) of the oil groove (10) and first mounting groove it
Between be equipped with the oil inlet passage that be connected to the piston rod (6) so that the oil in oil cylinder can be into oil groove (10), the master is close
The first sealing lip (7) to offset with the slot bottom of first mounting groove (12) and the piston rod are provided in seal (1)
(6) the second sealing lip (8) for offseting and the third sealing lip (11) to offset with the first side wall (13) of the mounting groove.
2. the sealing device of hydraulic cylinder piston rod according to claim 1, which is characterized in that the primary seal circle (1),
First sealing lip (7), second sealing lip (8) and the third sealing lip (11) integrally change structure.
3. the sealing device of hydraulic cylinder piston rod according to claim 1, which is characterized in that the third sealing lip
(11) between first sealing lip (7) and the oil groove (10), and the third sealing lip (11) and the oil groove
(10) internal face forms c-type structure.
4. the sealing device of hydraulic cylinder piston rod according to claim 1, which is characterized in that the primary seal circle (1)
On be additionally provided with root pair lip (9), root pair lip (9) setting the lower section of second sealing lip (8) and with the work
Stopper rod (6) offsets.
5. the sealing device of hydraulic cylinder piston rod according to claim 1, which is characterized in that the primary seal circle (1)
Support ring (3) is provided between the second sidewall (14) of first mounting groove.
6. the sealing device of hydraulic cylinder piston rod according to claim 1, which is characterized in that the guide sleeve (2)
Inner wall is provided with the second mounting groove, and dustband (5) is provided in second mounting groove, and the piston rod (6) passes through described anti-
Konisphere (5).
7. the sealing device of hydraulic cylinder piston rod according to claim 1, which is characterized in that the guide sleeve (2)
Inner wall is provided with third mounting groove, and cushion seal circle (4) is provided in the third mounting groove, and the piston rod (6) passes through institute
State cushion seal circle (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721855347.XU CN207728882U (en) | 2017-12-26 | 2017-12-26 | A kind of sealing device of hydraulic cylinder piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721855347.XU CN207728882U (en) | 2017-12-26 | 2017-12-26 | A kind of sealing device of hydraulic cylinder piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207728882U true CN207728882U (en) | 2018-08-14 |
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ID=63086709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721855347.XU Active CN207728882U (en) | 2017-12-26 | 2017-12-26 | A kind of sealing device of hydraulic cylinder piston rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207728882U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833187A (en) * | 2020-12-10 | 2021-05-25 | 上海唯万密封科技股份有限公司 | High-temperature-resistant piston rod sealing system of middle-high-end excavator |
-
2017
- 2017-12-26 CN CN201721855347.XU patent/CN207728882U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833187A (en) * | 2020-12-10 | 2021-05-25 | 上海唯万密封科技股份有限公司 | High-temperature-resistant piston rod sealing system of middle-high-end excavator |
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