CN215949991U - Hydraulic cylinder with novel sealing structure - Google Patents
Hydraulic cylinder with novel sealing structure Download PDFInfo
- Publication number
- CN215949991U CN215949991U CN202121338109.8U CN202121338109U CN215949991U CN 215949991 U CN215949991 U CN 215949991U CN 202121338109 U CN202121338109 U CN 202121338109U CN 215949991 U CN215949991 U CN 215949991U
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- sealing
- groove
- piston
- hydraulic cylinder
- ring
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- 238000007789 sealing Methods 0.000 title claims abstract description 148
- 230000000694 effects Effects 0.000 abstract description 11
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 238000010030 laminating Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- Sealing Devices (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to a hydraulic cylinder with a novel sealing structure, which comprises a cylinder barrel, a piston and a piston rod, wherein the rear end surface of the piston is provided with an elastic ring sleeved on the piston rod, and the front end surface of the piston is provided with an elastic pad sleeved on the piston rod; the sealing groove a is formed in the circumferential surface of the piston, a sealing ring a is arranged in the sealing groove a, arc surfaces are arranged on two sides of a notch of the sealing groove a, the outer side of the section of the sealing ring a is in an arc surface shape with an upward middle part, the inner side of the section of the sealing ring a is in a concave arc surface shape with a middle part, the arc top position of the outer side of the sealing ring a is attached to the inner wall of the cylinder barrel, the two sides of the arc top are respectively attached to the left arc surface and the right arc surface of the sealing groove a, annular grooves are formed in the front end surface and the rear end surface of the piston, two groups of sealing grooves a and the sealing ring a are arranged in the front and the rear of the sealing groove a, and a plurality of channels communicated with the annular grooves and the sealing groove a are formed in the bottom of the annular grooves. The utility model solves the problems that the existing sealing structure is relatively fixed, and the sealing effect is reduced due to abrasion after long-time use, and the sealing structure does not have sealing compensation.
Description
Technical Field
The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a novel sealing structure.
Background
The problem that hydraulic oil leaks from one cavity to the other cavity through a piston easily exists in the use process of the hydraulic cylinder, and the leakage can reduce the performance of the hydraulic cylinder; therefore, a piston sealing structure with good sealing performance needs to be designed aiming at the problem of sealing failure of the existing hydraulic cylinder in use.
A Chinese utility model with the publication number of CN105179377B discloses a hydraulic cylinder piston sealing device with deformation prevention and oil leakage storage capacity, which mainly comprises a cylinder barrel, a piston rod, a U-shaped sealing ring a, a trapezoid sealing ring a, a U-shaped steel ring and a slag removing ring, wherein the oil leakage is temporarily stored through the U-shaped sealing ring a with a U-shaped cross section; the deformation of the U-shaped sealing ring a is reduced and the deformation failure of the U-shaped sealing ring a is prevented through the trapezoidal sealing ring a and the U-shaped steel ring.
But the sealing structure is complicated and troublesome to assemble, and the sealing performance is reduced as the service life is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art, and provides a hydraulic cylinder with a novel sealing structure, wherein a sealing groove a with a wide bottom and a narrow groove opening is matched with the outward-convex and inward-concave shape of a sealing ring a, the sealing performance of the sealing ring a is improved by utilizing the pressure of oil liquid in a chamber to act on the inner arc surface of the sealing ring a, and the oil pressure can apply acting force in multiple directions to enable the sealing ring a to be tightly attached to the arc surface and the inner wall of a cylinder barrel due to the arrangement of the inner arc surface of the sealing groove a matched with the sealing ring a, so that the sealing effect of the piston part of the hydraulic cylinder is greatly improved, even if the sealing ring a is worn after being used for a long time, the sealing ring a can be compensated and sealed by utilizing the action of the oil pressure to enable the sealing ring a to be always attached to the inner wall of the cylinder barrel, the problem that the existing sealing structure is relatively fixed is solved, and the wear sealing effect is greatly reduced after being used for a long time, the sealing compensation function is not provided by the sealing compensation device.
The technical solution of the utility model is as follows:
a hydraulic cylinder with a novel sealing structure comprises a cylinder barrel, a piston and a piston rod, wherein an elastic ring sleeved on the piston rod is arranged on the rear end face of the piston, and an elastic pad sleeved on the piston rod is arranged on the front end face of the piston; the utility model discloses a cylinder barrel, including piston, seal groove a, sealing washer a, inner side, sealing washer a, the notch both sides of seal groove a are provided with the arcwall face of inside excision, the cross-section outside of sealing washer a is the arcwall face form of middle epirelief, and its inboard is middle recessed arcwall form, the inner wall of sealing washer a outside arc top position department laminating cylinder, two arcwall faces about the sealing washer a of laminating respectively in the both sides of its arc top, all seted up the ring channel on the preceding terminal surface of piston and the rear end face, correspond with it be provided with two sets ofly around seal groove a and the sealing washer a, the passageway of a plurality of intercommunication ring channels and seal groove a is seted up to the bottom of ring channel.
Preferably, the width of the bottom of the sealing groove a is L1, the width of the notch is L2, wherein 1.3L2 < L1 < 2L 2.
Preferably, the depth of the sealing groove a is h, wherein 2cm < h < 4 cm.
Preferably, the channels are arranged in a circumferential array along the annular groove.
Preferably, one end of the channel facing the seal groove a is provided with a tapered wide opening, so that when oil enters the seal groove a, the oil is diffused and acts on the seal ring a, all parts of the seal ring a are stressed more uniformly, and the sealing effect is further ensured.
Preferably, the sealing ring a is made of rubber.
Preferably, a seal groove b is further formed in the circumferential surface of the piston between the left and right seal grooves a, and a seal ring b is disposed in the seal groove b, so that the sealing performance of the piston is further improved.
The utility model has the beneficial effects that:
in the utility model, the sealing ring a is matched and arranged to be convex and concave by setting the shape of the sealing groove a to be wide at the bottom and narrow at the notch, and the annular groove is communicated with the sealing groove a through the channel, so that oil liquid can enter the sealing groove a through the channel in the use process of the hydraulic cylinder, because the hydraulic cylinder can form pressure in the chamber no matter the hydraulic cylinder rises or falls in the use process, the sealing performance of the sealing ring a can be improved by utilizing the pressure of oil liquid in the chamber to act on the inner cambered surface of the sealing ring a, in addition, as the arc-shaped surface in the sealing groove a is matched with the sealing ring a, the oil pressure can apply acting force in multiple directions to enable the sealing ring a to be tightly attached to the arc-shaped surface and the inner wall of the cylinder barrel, the sealing effect of the piston part of the hydraulic cylinder in the using process is greatly improved, oil leakage between two chambers is avoided, and the working performance of the hydraulic cylinder is ensured;
in addition, the left sealing groove a and the right sealing groove a and the sealing ring a are arranged on the left and the right, so that the left sealing groove a and the right sealing groove a are respectively matched with the left oil body chamber and the right oil body chamber to work, and the sealing property is further ensured; one end of the channel facing the sealing groove a is provided with a conical wide opening, so that oil bodies are diffused and acted on the sealing ring a when entering the sealing groove a, all parts of the sealing ring a are stressed more uniformly, and the sealing effect is further ensured.
In conclusion, the hydraulic cylinder sealing device has the advantages of simple and ingenious structure, good sealing effect, good working efficiency of the hydraulic cylinder and the like, and is particularly suitable for the technical field of hydraulic cylinder sealing.
Drawings
The utility model is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic view of a hydraulic cylinder with a novel sealing structure, which is partially cut away;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is a sectional view of the piston;
FIG. 4 is an enlarged view of the structure of FIG. 3 at B;
FIG. 5 is a schematic structural diagram of a sealing ring a;
FIG. 6 is a schematic cross-sectional view of seal ring a;
FIG. 7 is a schematic view of the piston;
fig. 8 is an external structure schematic diagram of a hydraulic cylinder with a novel sealing structure.
The specific implementation mode is as follows:
the technical scheme in the embodiment of the utility model is clearly and completely explained by combining the attached drawings.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
Examples
As shown in fig. 1 to 8, the hydraulic cylinder with a novel sealing structure comprises a cylinder barrel 1, a piston 2 and a piston rod 3, wherein an elastic ring 4 sleeved on the piston rod 3 is arranged on the rear end face of the piston 2, and an elastic pad 5 sleeved on the piston rod 3 is arranged on the front end face of the piston; seal groove a201 has been seted up on the periphery of piston 2, be provided with sealing washer a6 in the seal groove a201, the notch 202 both sides of seal groove a201 are provided with the arcwall face 203 of inside excision, the cross-section outside of sealing washer a6 is the arcwall face form of middle epirelief, and its inboard is the arcwall face form of middle recessed, the inner wall of sealing washer a6 outside arc top 601 position department laminating cylinder 1, two arcwall faces 203 about its arc top 601 both sides laminate seal groove a201 respectively, annular groove 7 has all been seted up on the preceding terminal surface of piston 2 and the rear end face, correspond it be provided with two sets ofly around seal groove a201 and the sealing washer a6, passageway 71 of a plurality of intercommunication annular grooves 7 and seal groove a201 is seted up to the bottom of annular groove 7.
It is worth mentioning that by arranging the sealing groove a201 in a shape with a wide bottom and a narrow notch, the sealing ring a6 which is matched with the sealing groove a201 is in a convex and concave shape, and the annular groove 7 is communicated with the sealing groove a201 through the channel 71, so that the oil liquid in the hydraulic cylinder can enter the sealing groove a201 through the channel in the use process, because the hydraulic cylinder forms pressure in the chamber no matter the hydraulic cylinder rises or falls in the use process, the sealing performance of the sealing ring a can be improved by utilizing the pressure of the oil liquid in the chamber to act on the inner arc surface of the sealing ring a6, and because the arrangement of the inner arc surface of the sealing groove a201 is matched with the sealing ring a, the oil pressure can apply acting force in multiple directions to enable the sealing ring a to be tightly attached to the arc surface and the inner wall, the sealing effect of the piston part of the hydraulic cylinder in the use process is greatly improved, and oil leakage between the two chambers is avoided, the working performance of the hydraulic cylinder is ensured;
in addition, the left sealing groove a and the right sealing groove a and the sealing ring a are arranged on the left and the right, so that the left sealing groove a and the right sealing groove a are respectively matched with the left oil body chamber and the right oil body chamber to work, and the sealing property is further ensured;
furthermore, the width of the bottom of the sealing groove a201 is L1, the width of the notch 202 is L2, wherein 1.6L2 is L1, and the sealing effect when oil pressure acts on the sealing ring a is best when the sealing groove a201 is set according to the size of the sealing groove a under the condition of multiple tests.
Further, the depth of the sealing groove a201 is h, where h is 2.5 cm.
Further, the passages 71 are arranged in a plurality in an array in the circumferential direction of the annular groove 7.
Furthermore, one end of the channel 71 facing the seal groove a201 is provided with a tapered wide opening, and one end of the channel facing the seal groove a is provided with a tapered wide opening, so that when oil enters the seal groove a, the oil is diffused and acts on the seal ring a, all parts of the seal ring a are stressed more uniformly, and the sealing effect is further ensured.
Further, the seal ring a6 is made of rubber.
Furthermore, a seal groove b8 is further formed on the circumferential surface of the piston 2 between the left and right seal grooves a201, and a seal ring b81 is disposed in the seal groove b 8.
In the description of the present invention, it is to be understood that the terms "front-back", "left-right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or component must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Of course, in this disclosure, those skilled in the art will understand that the terms "a" and "an" should be interpreted as "at least one" or "one or more," i.e., in one embodiment, a number of an element may be one, and in another embodiment, a number of the element may be plural, and the terms "a" and "an" should not be interpreted as limiting the number.
The present invention is not limited to the above-described embodiments, and it should be noted that various changes and modifications can be made by those skilled in the art without departing from the structure of the present invention, and these changes and modifications should be construed as the scope of the present invention, which does not affect the effect and practicality of the present invention.
Claims (7)
1. A hydraulic cylinder with a novel sealing structure comprises a cylinder barrel (1), a piston (2) and a piston rod (3), wherein an elastic ring (4) sleeved on the piston rod (3) is arranged on the rear end face of the piston (2), and an elastic pad (5) sleeved on the piston rod (3) is arranged on the front end face of the piston; a sealing groove a (201) is formed in the circumferential surface of the piston (2), a sealing ring a (6) is arranged in the sealing groove a (201), it is characterized in that two sides of a notch (202) of the sealing groove a (201) are provided with arc surfaces (203) which are cut inwards, the outer side of the section of the sealing ring a (6) is in the shape of an arc surface with a convex middle part, the inner side of the sealing ring is of an arc surface shape with a concave middle part, the arc top (601) position at the outer side of the sealing ring a (6) is attached to the inner wall of the cylinder barrel (1), the two sides of the arc top (601) are respectively attached to the left arc surface and the right arc surface (203) of the sealing groove a (201), the front end surface and the rear end surface of the piston (2) are both provided with annular grooves (7), two groups of sealing grooves a (201) and sealing rings a (6) corresponding to the sealing grooves are arranged in front of and behind the sealing grooves, the bottom of the annular groove (7) is provided with a plurality of channels (71) which are communicated with the annular groove (7) and the sealing groove a (201).
2. The hydraulic cylinder with a novel sealing structure according to claim 1, wherein the width of the bottom of the sealing groove a (201) is L1, the width of the notch (202) is L2, and 1.3L2 < L1 < 2L 2.
3. The hydraulic cylinder with a novel sealing structure as claimed in claim 1, wherein the depth of the sealing groove a (201) is h, wherein 2cm < h < 4 cm.
4. Hydraulic cylinder with a new sealing structure according to claim 1, characterized in that the channels (71) are arranged in a circumferential array along the annular groove (7).
5. The hydraulic cylinder with a novel sealing structure as claimed in claim 1, wherein the channel (71) is provided with a conical wide mouth towards one end of the sealing groove a (201).
6. The hydraulic cylinder with a novel sealing structure according to claim 1, wherein the sealing ring a (6) is made of rubber.
7. The hydraulic cylinder with a novel sealing structure according to claim 1, wherein a sealing groove b (8) is further formed in the circumferential surface of the piston (2) between the left sealing groove a and the right sealing groove a (201), and a sealing ring b (81) is arranged in the sealing groove b (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121338109.8U CN215949991U (en) | 2021-06-16 | 2021-06-16 | Hydraulic cylinder with novel sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121338109.8U CN215949991U (en) | 2021-06-16 | 2021-06-16 | Hydraulic cylinder with novel sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215949991U true CN215949991U (en) | 2022-03-04 |
Family
ID=80504795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121338109.8U Expired - Fee Related CN215949991U (en) | 2021-06-16 | 2021-06-16 | Hydraulic cylinder with novel sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215949991U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431818A (en) * | 2021-06-16 | 2021-09-24 | 深圳市先进智能技术研究所 | Hydraulic cylinder with novel sealing structure |
| RU234044U1 (en) * | 2024-12-19 | 2025-05-16 | Не публикуется в соответствии с постановлением Правительства РФ от 2 сентября 2024 г. N 1209 | COMPRESSOR PISTON |
-
2021
- 2021-06-16 CN CN202121338109.8U patent/CN215949991U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431818A (en) * | 2021-06-16 | 2021-09-24 | 深圳市先进智能技术研究所 | Hydraulic cylinder with novel sealing structure |
| RU234044U1 (en) * | 2024-12-19 | 2025-05-16 | Не публикуется в соответствии с постановлением Правительства РФ от 2 сентября 2024 г. N 1209 | COMPRESSOR PISTON |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220304 |