CN208935065U - A kind of hydraulic cylinder with oil-leakage-prevention piston sealing device - Google Patents
A kind of hydraulic cylinder with oil-leakage-prevention piston sealing device Download PDFInfo
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- CN208935065U CN208935065U CN201821673337.9U CN201821673337U CN208935065U CN 208935065 U CN208935065 U CN 208935065U CN 201821673337 U CN201821673337 U CN 201821673337U CN 208935065 U CN208935065 U CN 208935065U
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- sealing
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Abstract
The utility model provides a kind of hydraulic cylinder with oil-leakage-prevention piston sealing device, including hydraulic cylinder body, hydraulic cylinder end cover and piston rod, it further include piston sealing device, piston sealing device includes dustband, wear ring, oil sealing, guide ring and oil guide structure, the inside of hydraulic cylinder end cover is equipped with installation dustband, wear ring, the groove of oil sealing and guide ring, dustband, wear ring, oil sealing, guide ring is sequentially arranged on the piston rod and is fastened between piston rod and hydraulic cylinder end cover, oil guide structure includes being arranged on hydraulic cylinder body to unload oil export, be arranged in that cylinder ends cover unload oil inlet and connection unloads oil export and unloads the emptying channel of oil inlet, oil inlet is unloaded to be arranged between wear ring and oil sealing, and it unloads and built-in check valve is installed above oil inlet, the import of built-in check valve and emptying inlet communication, it is interior The outlet for setting check valve is connected with emptying channel, and the utility model can avoid along cylinder ends oil leak.
Description
Technical field
The utility model relates to a kind of hydraulic cylinders with oil-leakage-prevention piston sealing device.
Background technique
With the development of science and technology, society is being continuously increased the demand of the energy, and mankind's environmental consciousness is continuous
Enhancing, the requirement to air quality is higher and higher, exploitation of international, the domestic social desirability to new energy, especially clean energy resource
Proportion of utilization is continuously improved, wherein wind-power electricity generation becomes generation because of its clean and environmental protection, the advantage that pollution-free, energy is big, prospect is wide
The strategic choice of various countries, boundary, Wind turbines are the important component of Wind Power Generation Industry and basis and the screen of Wind Power Generation Industry development
Barrier, since wind farm siting is gradually developed toward sea from inland, Wind turbines technology path is changed into hydraulic change by electric variable pitch
Paddle, but hydraulic cylinder sealing problem is one of main problem existing for wind power generating set on international, domestic market, and hydraulic cylinder is made
With being driving blade rotation, receive wind energy to being changed into electric energy, the operating position of hydraulic cylinder in wheel hub, apart from ground compared with
Height, working environment and operating condition are more severe, and installation site can not install lifting appliance in wheel hub, lead to hydraulic cylinder disassembly very not
Convenient, maintenance is relatively difficult, and maintenance cost is higher.
And hydraulic cylinder piston rod reciprocal telescopic movement can form oil film on surface, oil film is accumulated for a long time, can be in piston rod
Pressure is generated between dustband and oil sealing between end cap, since dustband resistance to pressure is poor, the phase leaks after operation for meeting
Oily phenomenon.
Therefore it is badly in need of a kind of a kind of liquid with oil-leakage-prevention piston sealing device that can avoid along cylinder ends oil leak
Cylinder pressure.
Utility model content
The utility model provides the following technical solution:
A kind of hydraulic cylinder with oil-leakage-prevention piston sealing device, including hydraulic cylinder body, hydraulic cylinder end cover and piston
Bar, hydraulic cylinder end cover are fixed on hydraulic cylinder body one end by bolt, and piston rod passes through hydraulic cylinder end cover in hydraulic cylinder
Reciprocal telescopic movement is done in vivo, further includes piston sealing device, piston sealing device includes dustband, wear ring, oil sealing, guiding
Ring and oil guide structure, the inside of hydraulic cylinder end cover are equipped with the groove of installation dustband, wear ring, oil sealing and guide ring, prevent
Konisphere, wear ring, oil sealing, guide ring are sequentially arranged on the piston rod and are fastened between piston rod and hydraulic cylinder end cover, Oil Guide
Structure include be arranged on hydraulic cylinder body unload oil export, be arranged in that cylinder ends cover unload oil inlet and connection emptying
It unloads oil inlet and is arranged between wear ring and oil sealing, and unload and be equipped with above oil inlet in the emptying channel for exporting and unloading oil inlet
Built-in check valve, the import of built-in check valve and emptying inlet communication, the outlet of built-in check valve is connected with emptying channel.
Preferably, the outside of hydraulic cylinder end cover is equipped with pressure detecting mouth, fills in plug, and pressure detecting at pressure detecting mouth
Mouth is connected with the outlet of built-in check valve.
Preferably, hydraulic cylinder body is equipped with ring and is located at the channel sealing ring on the outside of emptying channel, and channel sealing ring is set
Set the gap between hydraulic cylinder body and hydraulic cylinder end cover.
Preferably, be additionally provided with oil inlet on hydraulic cylinder body, oil inlet is arranged in the side for unloading oil export, and oil inlet with
Oil export is unloaded to be connected with fuel tank.
Preferably, sensor interface is additionally provided on hydraulic cylinder body.
The beneficial effects of the utility model are:
1, due to piston rod reciprocal telescopic movement can surface formed oil film, oil film for a long time accumulate, can dustband with
Pressure is generated between oil sealing, and dustband resistance to pressure is poor, therefore works long hours, oil liquid can be by dustband from cylinder ends
Portion's outflow, therefore oil inlet is unloaded by covering to be arranged between wear ring and oil sealing in cylinder ends, in hydraulic cylinder end cover
On unload oil inlet, and unload and built-in check valve be installed above oil inlet, emptying channel will unload oil inlet, built-in check valve and emptying
Outlet carries out emptying work, and oil liquid is clapped oil return box by unloading oil export, can avoid the leakage of hydraulic cylinder body end
The phenomenon of oil.
2, since emptying channel is that oil liquid is made to return to fuel tank by internal galleries, external pipeline design can be reduced, is subtracted
Few components, reduce leakage point.
3, since there is slight reversed oil pressure in emptying channel, built-in check valve, Ke Yibao are installed in all designs on a passage
Impact will not be generated to dustband by demonstrate,proving reversed oil pressure.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structure sectional view of the utility model；
Label in figure: 1 hydraulic cylinder body, 2 oil inlets, 3 unload oil export, 4 emptying channels, 5 pressure detecting mouths, built in 6
Check valve, 7 unload oil inlet, 8 dustbands, 9 piston rods, 10 wear rings, 11 oil sealings, 12 hydraulic cylinder end covers, 13 guide rings, 14 sensings
Device interface.
Specific embodiment
As shown in Figure 1, a kind of structure sectional view of the hydraulic cylinder with oil-leakage-prevention piston sealing device, in the present embodiment
In, including hydraulic cylinder body 1, hydraulic cylinder end cover 12 and piston rod 9, hydraulic cylinder end cover 12 be fixed on hydraulic by bolt
1 one end of cylinder cylinder body, piston rod 9 pass through hydraulic cylinder end cover 12 and do reciprocal telescopic movement in hydraulic cylinder body 1, further include that piston is close
Seal apparatus, piston sealing device include dustband 8, wear ring 10, oil sealing 11, guide ring 13 and oil guide structure, cylinder ends
The inside of lid 12 is equipped with the groove of installation dustband 8, wear ring 10, oil sealing 11 and guide ring 13, dustband 8, wear ring 10,
Oil sealing 11, guide ring 13 are sequentially set on piston rod 9 and are fastened between piston rod 9 and hydraulic cylinder end cover 12, oil guide structure
Including be arranged on hydraulic cylinder body 1 unload oil export 3, be arranged on hydraulic cylinder end cover 12 unloading oil inlet 7 and connection unload
Oil export 3 and the emptying channel 4 for unloading oil inlet 7 are unloaded oil inlet 7 and are arranged between wear ring 10 and oil sealing 11, and unload oil inlet 7
Top is equipped with built-in check valve 6, and the import of built-in check valve 6 is connected to oil inlet 7 is unloaded, the outlet of built-in check valve 6 with unload
Oily channel 4 is connected.
The outside of hydraulic cylinder end cover 12 is equipped with pressure detecting mouth 5, fills in plug, and pressure detecting mouth 5 at pressure detecting mouth 5
It is connected with the outlet of built-in check valve 6, when detecting the pressure of pressure detecting mouth 5, by the way that plug will be extracted, in pressure detecting
Pressure gauge is connected at mouth 5, can be detected its internal pressure.
Hydraulic cylinder body 1 is equipped with the channel sealing ring that ring is located at 4 outside of emptying channel, and channel sealing ring is arranged in liquid
Gap between cylinder pressure cylinder body and hydraulic cylinder end cover, so as to effectively avoid in hydraulic cylinder body 1 and hydraulic cylinder end cover
Between there is oil leakage phenomenon.
Be additionally provided with oil inlet 2 on hydraulic cylinder body 1, oil inlet 2 is arranged in the side for unloading oil export 3, and oil inlet 2 with unload
Oil export 3 is connected with fuel tank.
Sensor interface 14 is additionally provided on hydraulic cylinder body 1.
The working principle of the utility model is: the oil film being formed on its surface can lead in piston rod reciprocal telescopic movement
It crosses the oil inlet that unloads between wear ring and oil sealing, and then passes through built-in check valve 6 along emptying channel 4, from unloading oil export 3
The phenomenon that oil liquid is clapped into oil return box, the oil leak of hydraulic cylinder body end can be avoided.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng
The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.It is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in practical
Within novel protection scope.
Claims (4)
1. a kind of hydraulic cylinder with oil-leakage-prevention piston sealing device, including hydraulic cylinder body, hydraulic cylinder end cover and piston rod,
The hydraulic cylinder end cover is fixed on described hydraulic cylinder body one end by bolt, and the piston rod passes through the cylinder ends
It covers and does reciprocal telescopic movement in the hydraulic cylinder body, which is characterized in that it further include piston sealing device, the piston seal
Device includes dustband, wear ring, oil sealing, guide ring and oil guide structure, and the inside of the hydraulic cylinder end cover is equipped with installation institute
State the groove of dustband, the wear ring, the oil sealing and the guide ring, the dustband, the wear ring, the oil
Envelope, the guide ring are sequentially set on the piston rod and are fastened between the piston rod and the hydraulic cylinder end cover, institute
State oil guide structure include be arranged on the hydraulic cylinder body unload oil export, be arranged in emptying that the cylinder ends cover into
Mouthful and connection described in unload oil export and the emptying channel for unloading oil inlet, it is described unload oil inlet setting in the wear ring and
Between the oil sealing, and described unload is equipped with built-in check valve above oil inlet, and the import of the built-in check valve is unloaded with described
The outlet of oil inlet connection, the built-in check valve is connected with the emptying channel.
2. a kind of hydraulic cylinder with oil-leakage-prevention piston sealing device according to claim 1, which is characterized in that the liquid
The outside of cylinder pressure end cap is equipped with pressure detecting mouth, fills in plug at the pressure detecting mouth, and the pressure detecting mouth with it is described
The outlet of built-in check valve is connected.
3. a kind of hydraulic cylinder with oil-leakage-prevention piston sealing device according to claim 1, which is characterized in that the liquid
Cylinder pressure cylinder body is equipped with ring and is located at the channel sealing ring on the outside of the emptying channel, and the channel sealing ring is arranged in the liquid
Gap between cylinder pressure cylinder body and the hydraulic cylinder end cover.
4. a kind of hydraulic cylinder with oil-leakage-prevention piston sealing device according to claim 1, which is characterized in that the liquid
Be additionally provided with oil inlet on cylinder pressure cylinder body, the oil inlet is arranged in the side for unloading oil export, and the oil inlet with it is described
It unloads oil export to be connected with fuel tank, is additionally provided with sensor interface on the hydraulic cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821673337.9U CN208935065U (en) | 2018-10-16 | 2018-10-16 | A kind of hydraulic cylinder with oil-leakage-prevention piston sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821673337.9U CN208935065U (en) | 2018-10-16 | 2018-10-16 | A kind of hydraulic cylinder with oil-leakage-prevention piston sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208935065U true CN208935065U (en) | 2019-06-04 |
Family
ID=66724780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821673337.9U Expired - Fee Related CN208935065U (en) | 2018-10-16 | 2018-10-16 | A kind of hydraulic cylinder with oil-leakage-prevention piston sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208935065U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360181A (en) * | 2019-07-28 | 2019-10-22 | 天津市双象工程液压件有限责任公司 | A kind of cylinder cap and the hydraulic cylinder for being equipped with this cylinder cap |
| CN110388351A (en) * | 2019-07-28 | 2019-10-29 | 天津市双象工程液压件有限责任公司 | A kind of hydraulic cylinder with leakproofness prompt facility |
-
2018
- 2018-10-16 CN CN201821673337.9U patent/CN208935065U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360181A (en) * | 2019-07-28 | 2019-10-22 | 天津市双象工程液压件有限责任公司 | A kind of cylinder cap and the hydraulic cylinder for being equipped with this cylinder cap |
| CN110388351A (en) * | 2019-07-28 | 2019-10-29 | 天津市双象工程液压件有限责任公司 | A kind of hydraulic cylinder with leakproofness prompt facility |
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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: 20190604 Termination date: 20191016 |