CN104964037A - Hydraulic cylinder sealing structure - Google Patents
Hydraulic cylinder sealing structure Download PDFInfo
- Publication number
- CN104964037A CN104964037A CN201510374318.0A CN201510374318A CN104964037A CN 104964037 A CN104964037 A CN 104964037A CN 201510374318 A CN201510374318 A CN 201510374318A CN 104964037 A CN104964037 A CN 104964037A
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- sealing
- ring
- piston
- type groove
- 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.)
- Pending
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing Devices (AREA)
Abstract
The invention provides a hydraulic cylinder sealing structure which comprises a cylinder body and a piston. The cylinder body is provided with a U-shaped groove, and the piston is mounted in the U-shaped groove of the cylinder body. An oil drain opening and an oil inlet are sequentially formed in the side wall of the U-shaped groove of the cylinder body from top to bottom. A U-shaped sealing ring and a step seal are sequentially arranged on the inner side wall of the U-shaped groove of the cylinder body from top to bottom, and the U-shaped sealing ring and the step seal are located between the oil drain opening and the oil inlet. The sealing structure combining multiple sealing pieces is adopted, the sealing structure can bear large lateral load, reduces bias pressure of the sealing pieces and enables the service lives of the sealing pieces to be prolonged. Through cooperation of the step seal 3 and the U-shaped ring 4, the problem that equipment is polluted due to the fact that the step seal has the inherent characteristic of taking out an oil film is avoided. The maintenance frequency and maintenance cost of a fan are lowered.
Description
Technical field
The invention belongs to the technical field of generator, particularly relate to a kind of hydraulic cylinder sealing structure.
Background technique
Along with the development of science and technology, the social demand to the energy is in continuous increase, and the continuous enhancing of mankind's environmental consciousness, the proportion of utilization of more and more higher to the requirement of air quality, international, domestic social desirability to novel energies such as various pollution-free clean energy resource, renewable energy sourcess improves constantly.Wind energy is use more for convenience in all novel energies, a kind of energy that user cost is lower.Current sealing problem is one of subject matter that on the world, Domestic market, wind-driven generator break exists.The brake operation position of wind-driven generator is all in cabin, and distance ground is higher, and the weight of break itself is larger, and cabin inner brake installed position cannot install lifting appliance, cause the dismounting of break very inconvenient, safeguard more difficult, maintenance cost is higher; And the working environment of wind-driven generator device and operating mode more severe.
The sealing configuration of current domestic wind power brake mainly contains following two kinds:
Structure is the sealing configuration that lips dust ring a adds U-shaped seal ring a, and the feature of this kind of sealing configuration is: its sealing effect comes from preload itself, operationally the pressure increase radial Mechanical Contact power of sealing of system; And the pre compressed magnitude of sealing lip when mounted, even if also can good sealing property be obtained under low pressure operating mode; Its good sealing effect, wear resistance be good, it is little to wear and tear, on heavy duty with piston rods bend does not affect, on features such as shock load do not affect.But its anti-extrudability poor, between piston rod and piston hole matching gap requires higher, frictional force is larger, there will be creeping phenomenon in the course of the work, the ability of bearing lateral force is more weak, the lateral force of sealing configuration is born by Sealing, can cause the bias-pressure phenomenon of Sealing like this, Sealing can reduce its working life under the effect of long-term bias voltage.
The sealing configuration that another kind of structure is lips dust ring b, this special envelope adds wear ring, the feature of this kind of sealing configuration is: this structure is effectively a kind of and reliable low friction sealed, is widely used in the rod seal of high pressure, middle pressure and low service system.This sealing configuration resists extrudability good, can keep larger gap between piston rod and piston cavity inwall.This sealing configuration has good static and dynamic sealing performance, and frictional force is little, nothing is creeped, sticking phenomenon, the good dimensionally stable of wear resistance, and not temperature influence, have excellent buffer function to thump pressure, structure comparison is compact, and the ability of bearing lateral force is stronger.But because this spy seals the oil film that piston in the course of the work can take trace out of, have a small amount of fluid after longevity of service and be gathered in this special envelope exocoel, and can flow out by oil leak hole.
Summary of the invention
For solving the problems of the technologies described above, devising a kind of sealing configuration that can reduce the existing picture of hydraulic cylinder sealing element bias voltage and prevent oil film tyre, thus extending the working life of oil hydraulic cylinder.。
The present invention is achieved by the following technical programs.
A kind of hydraulic cylinder sealing structure provided by the invention, comprises cylinder body and piston, the U-shaped groove of cylinder body, and piston is arranged in the U-type groove of cylinder body, on the sidewall of cylinder body U-type groove, has drain tap and filler opening successively from top to bottom; The madial wall of cylinder body U-type groove is from top to bottom successively U-shaped seal ring and Si Te envelope, and U-shaped seal ring and Si Te envelope are between drain tap and filler opening.
Further, the madial wall of cylinder body U-type groove also has dust ring, and described dust ring is positioned at the upper end of drain tap.
Further, the madial wall of cylinder body U-type groove also has wear ring, described wear ring has two, wear ring on the madial wall of cylinder body U-type groove between this special envelope with filler opening, between dust ring on the madial wall of cylinder body U-type groove of wear ring and drain tap.
Beneficial effect of the present invention is: the sealing configuration that present invention employs a kind of multiple seal combination.This sealing configuration can carry larger lateral load, reduces the bias voltage of Sealing, seal life is extended.By this special envelope 3 and U-shaped circle 4 with the use of, avoid because this special envelope can take the inherent characteristic of oil film and contaminated equipment out of, thus reduce frequency of maintenance and the maintenance cost of blower fan.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is a kind of structural representation of prior art.
Fig. 3 is the another kind of structural representation of prior art.
In figure: 1-cylinder body, 2-wear ring, 3-Si spy envelope, 4-U shape seal ring, 5-dust ring, 6-piston, 7-drain tap, 8-filler opening, 11-U RunddichtringO a, 12-lips dust ring a, 13--lips dust ring b, 14-wear ring, 15-Si spy envelope.
Embodiment
Further describe technological scheme of the present invention below, but described in claimed scope is not limited to.
A kind of hydraulic cylinder sealing structure as shown in Figure 1, comprises cylinder body 1 and piston 6, the U-shaped groove of cylinder body 1, and piston 6 is arranged in the U-type groove of cylinder body 1, on the sidewall of cylinder body 1U type groove, has drain tap 7 and filler opening 8 from top to bottom successively; The madial wall of cylinder body 1U type groove is from top to bottom successively U-shaped seal ring 4 and Si Te envelope 3, and U-shaped seal ring 4 and Si Te envelope 3 are between drain tap 7 and filler opening 8; Si Te envelope 3 is arranged on the middle part (particular location is determined by the working stroke of product piston) of piston cavity, plays main seal effect in the product.U-shaped seal ring is installed between this special envelope 3 and drain tap, play auxiliary seal effect in the product, because this special envelope 3 can take the oil film contaminated equipment of trace in the course of the work out of, the oil film taken out of in working procedure can carry out tackling in the chamber that formed in this special envelope 3 and U-shaped circle 4 by U-shaped circle, be unlikely to flow out cylinder body 1 contaminated equipment, the oil film of interception can be inhaled function by the blowback of this special envelope 3 and suck back in hydraulic pressure cavity.
Further, in the present embodiment, the madial wall of cylinder body 1U type groove also has dust ring 5, and described dust ring 5 is positioned at the upper end of drain tap 7, effectively can prevent extraneous dust and foreign matter from entering piston cavity inside and form one deck lubricant film on piston 6 surface in piston movement process.
Further, the madial wall of cylinder body 1U type groove also has wear ring 2, described wear ring 2 has two, wear ring 2 on the madial wall of cylinder body 1U type groove between this special envelope 3 and filler opening 8, between dust ring 5 on the madial wall of cylinder body 1U type groove of wear ring 2 and drain tap 7; Wear ring 2 is arranged on the both sides of this special envelope 3 and U-shaped circle 4, its mounting distance should be tried one's best large when product operating mode and structure allow, to play its guide function to greatest extent, its Main Function is the lateral force that piston 6 leads and loading piston 6 produces at work.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (3)
1. a hydraulic cylinder sealing structure, comprise cylinder body (1) and piston (6), cylinder body (1) U-shaped groove, piston (6) is arranged in the U-type groove of cylinder body (1), on the sidewall of cylinder body (1) U-type groove, there are drain tap (7) and filler opening (8) from top to bottom successively, it is characterized in that: be U-shaped seal ring (4) and this special envelope (3) from top to bottom successively on the madial wall of cylinder body (1) U-type groove, and U-shaped seal ring (4) and this special envelope (3) are positioned between drain tap (7) and filler opening (8).
2. hydraulic cylinder sealing structure as claimed in claim 1, is characterized in that: on the madial wall of cylinder body (1) U-type groove, also have dust ring (5), described dust ring (5) is positioned at the upper end of drain tap (7).
3. hydraulic cylinder sealing structure as claimed in claim 1, it is characterized in that: on the madial wall of cylinder body (1) U-type groove, also have wear ring (2), described wear ring (2) has two, wear ring (2) be positioned on the madial wall of cylinder body (1) U-type groove between this special envelope (3) and filler opening (8), wear ring (2) is positioned between dust ring (5) on the madial wall of cylinder body (1) U-type groove and drain tap (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510374318.0A CN104964037A (en) | 2015-06-30 | 2015-06-30 | Hydraulic cylinder sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510374318.0A CN104964037A (en) | 2015-06-30 | 2015-06-30 | Hydraulic cylinder sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104964037A true CN104964037A (en) | 2015-10-07 |
Family
ID=54218088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510374318.0A Pending CN104964037A (en) | 2015-06-30 | 2015-06-30 | Hydraulic cylinder sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104964037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894845A (en) * | 2020-07-17 | 2020-11-06 | 重庆海浦洛自动化科技有限公司 | Sealing mechanism for automobile coating glue supply servo quantifying machine and assembling and disassembling method thereof |
-
2015
- 2015-06-30 CN CN201510374318.0A patent/CN104964037A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894845A (en) * | 2020-07-17 | 2020-11-06 | 重庆海浦洛自动化科技有限公司 | Sealing mechanism for automobile coating glue supply servo quantifying machine and assembling and disassembling method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151007 |