CN201196127Y - Servomotor - Google Patents
Servomotor Download PDFInfo
- Publication number
- CN201196127Y CN201196127Y CNU2008200345308U CN200820034530U CN201196127Y CN 201196127 Y CN201196127 Y CN 201196127Y CN U2008200345308 U CNU2008200345308 U CN U2008200345308U CN 200820034530 U CN200820034530 U CN 200820034530U CN 201196127 Y CN201196127 Y CN 201196127Y
- Authority
- CN
- China
- Prior art keywords
- annular groove
- servomotor
- piston
- ring
- cylinder body
- 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.)
- Expired - Fee Related
Links
- 239000002131 composite material Substances 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract 1
- 229910000906 Bronze Inorganic materials 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 5
- 229920006362 Teflon® Polymers 0.000 description 5
- 239000010974 bronze Substances 0.000 description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Actuator (AREA)
Abstract
The utility model relates to a servomotor for hydropower units, comprising a cylinder body, a cylinder cover, a piston rod fit with the cylinder cover via a liquid packing type and a piston provided on the piston rod, wherein the piston is at least provided with an annular groove in which an annular seal ring and an O-shaped ring made from flexible composite material are provided, the O-shaped rig is arranged at the bottom of the annular groove, the annular seal ring is arranged at the notch of the annular groove and abut against inner wall of the cylinder body. The servomotor has good seal performance and the sealing device will not abrade the inner wall of the cylinder body, thereby effectively preventing internal leakage between the rod chamber and the non-rod chamber of the servomotor, and improving the working efficiency of the servomotor, with wide application.
Description
Technical field
The utility model relates to a kind of parts of hydroelectric power unit, is specifically related to a kind of servomotor that is used to drive hydro-turbo generator set water guide mechanism or operation butterfly valve etc.
Background technique
The existing servomotor that is used for the hydroelectric power unit, comprise cylinder body, cylinder cap, piston rod and be installed in piston on the piston rod, piston and cylinder body are to realize liquid sealing by the band opening metallic piston ring that is provided with on piston, because piston ring has opening, itself allows leakage of oil, and piston ring and cylinder body are all made by metallic material, when piston is reciprocating in cylinder body, piston ring causes wearing and tearing to inboard wall of cylinder block easily, thereby cause the rod chamber of servomotor and the leakage between the rodless cavity, reduced the working efficiency of servomotor; On the other hand, in case there is impurity in the fluid, easily cause the plucking wearing and tearing between metallic piston ring and the cylinder body, thereby quicken to damage piston and servomotor cylinder body.
The model utility content
The purpose of this utility model provides a kind of servomotor of good seal performance, and can improve the wearing and tearing of seal arrangement to inboard wall of cylinder block.
The utility model servomotor comprises cylinder body, cylinder cap, piston rod and is installed in piston on the piston rod, piston rod feeds cylinder body from the center hole of cylinder cap, also be provided with an annular groove on the said piston at least, the O-ring seal of being made by flexible composite is set in this annular groove, O-ring seal and inboard wall of cylinder block offset, and O-ring seal is preferably teflon bronze composite material.
This sealing has the mechanical strength height, high pressure resistant, chemical stability is good, heat-resisting, cold-resistant, oil resistant, wear-resisting property and self-lubricating property are good, and friction factor is extremely low, make servomotor not only have excellent sealing performance, prevent the internal leakage of cylinder body effectively, improved the working efficiency of servomotor.And its seal ring do not have wearing and tearing substantially to inboard wall of cylinder block, and working life is longer.
The utility model also comprises following technological scheme:
Also be provided with an O type circle in the said annular groove, this O type circle and said O-ring seal are overlapping to be arranged in the annular groove, and O type circle is positioned at the bottom land position in annular groove, and O-ring seal is positioned at the notch position in annular groove.
O type circle can provide certain pretightening force to O-ring seal, makes sealing effect more reliable.
Said piston also is provided with a guide ring of being made by flexible composite at least, should offset with the inboard wall of cylinder block face.Guide ring can reduce the excessive wear of piston and inboard wall of cylinder block, makes the longer service life of servomotor., said flexible composite is preferably teflon bronze composite material.
At least be provided with an annular groove on the internal face of said cylinder cap center hole, be provided with the O-ring seal of making in this annular groove by flexible composite.Also can be provided with an O type circle overlapping with O-ring seal in the annular groove of this cylinder cap, O type circle is positioned at the bottom land position in annular groove, and O-ring seal is positioned at the notch position in annular groove.
。Adopt such structure, make that the sealing between cylinder cap and the piston rod is more reliable, further improved the servomotor working efficiency.
The utility model is simple in structure, and is easy for installation, avoided the generation of servomotor rod chamber and rodless cavity internal leakage phenomenon, the action resistance is less during use, high working efficiency can satisfy the usage requirement of the hydroelectric generator group servomotor of current maximum single-machine capacity 700MW, has good commercial prospect.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is the example structure schematic representation of the utility model servomotor.
Fig. 2 is the enlarged view of the A portion of Fig. 1.
Fig. 3 is the enlarged view of the B portion of Fig. 1.
Embodiment
Referring to Fig. 1 and Fig. 2, this servomotor comprises cylinder body 1, cylinder cap 2 and piston rod 3, and piston 4 is equipped with in the inner of piston rod 3, and piston 4 is liquid sealing with cylinder body 1 and cooperates, and piston 4 faces are provided with annular groove 4-1; It is overlapping that flexible annular seal ring 5 and O type circle 6, two circles are housed in the annular groove 4-1, and O type circle 6 is positioned at bottom land, and O-ring seal 5 is positioned at notch.
O-ring seal 5 can adopt teflon bronze composite material or teflon-glass fibre-composite materials such as curing aluminium to make; The material of O type circle 6 can be selected nitrile butadiene rubber or fluorine rubber for use.
According to the size of piston and the length of stroke, annular groove 4-1 can be provided with one or more, and places the seal combination that is made of O-ring seal 5 and O type circle 6 in each groove 4-1.
As Fig. 2, piston 4 also is provided with the guide ring of being made by teflon bronze flexible composite 7, and this guide ring 7 offsets with cylinder body 1 internal face.In this example, be provided with four guide rings 7, and be arranged on the both sides of annular groove 4-1 in twos.
As Fig. 1 and Fig. 3, cylinder cap 2 center bore inner wall faces are provided with annular groove 2-1; The overlapping flexible annular seal ring 8 that is provided with O type circle 9 and teflon bronze composite material system in the annular groove 2-1.
Annular groove 2-1 on cylinder cap 2 internal faces can be provided with one or more as required, and in each groove the seal combination that is made of O-ring seal 8 and O type circle 9 is set.
In the outside of cylinder cap 2 internal face annular groove 2-1, the dust ring 10 of a polyurethane material is set, a ceramic bearing 11 is set in the inboard.
On cylinder cap 2 internal faces of dust ring 10 inboards, be provided with the axle Yx RunddichtringO 1 of polyurethane material.
Claims (8)
1. servomotor, comprise cylinder body (1), cylinder cap (2), piston rod (3) and be installed in piston (4) on the piston rod, piston rod (3) stretches into cylinder body from the center hole of cylinder cap (2), it is characterized in that being provided with at least on the said piston (4) annular groove (4-1), the O-ring seal (5) of being made by flexible composite is set in this annular groove, and O-ring seal (5) offsets with cylinder body (1) inwall.
2. servomotor according to claim 2, it is characterized in that also being provided with in the said annular groove (4-1) an O type circle (6), this O type circle (6) is arranged in the annular groove (4-1) with said O-ring seal (5) is overlapping, O type circle (6) is positioned at the bottom land position in annular groove (4-1), O-ring seal (5) is positioned at the notch position in annular groove (4-1).
3. servomotor according to claim 2 is characterized in that said piston (4) is provided with a guide ring of being made by flexible composite (7) at least, and this guide ring (7) offsets with the internal face of cylinder body (1).
4. servomotor according to claim 3 is characterized in that said guide ring (7) is provided with four, and is arranged on the both sides of annular groove (4-1) in twos.
5. servomotor according to claim 1 is characterized in that being provided with an annular groove (2-1) at least on the internal face of said cylinder cap (2) center hole, is provided with the O-ring seal (8) of being made by flexible composite in this annular groove (2-1).
6. servomotor according to claim 5, it is characterized in that also being provided with an O type circle (9) overlapping in the annular groove (2-1) of this cylinder cap (2) with O-ring seal (8), O-ring seal (8) is positioned at the notch position in annular groove (2-1), O type circle (9) is positioned at the bottom land position in annular groove (2-1).
7. servomotor according to claim 6 is characterized in that the inboard is provided with a ceramic bearing (11) at a dust ring of arranged outside (10) of the internal face of cylinder cap (2) center hole.
8. servomotor according to claim 7 between the annular groove (2-1) and dust ring (10) on cylinder cap (2) the center bore inner wall face, is provided with a Yx RunddichtringO (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200345308U CN201196127Y (en) | 2008-04-29 | 2008-04-29 | Servomotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200345308U CN201196127Y (en) | 2008-04-29 | 2008-04-29 | Servomotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201196127Y true CN201196127Y (en) | 2009-02-18 |
Family
ID=40415763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200345308U Expired - Fee Related CN201196127Y (en) | 2008-04-29 | 2008-04-29 | Servomotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201196127Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985914A (en) * | 2010-12-01 | 2011-03-16 | 常州液压成套设备厂有限公司 | Hydraulic servomotor for hydroelectric generating set |
| CN102494165A (en) * | 2011-11-29 | 2012-06-13 | 上海汇益控制系统股份有限公司 | Piston type crisis intercepter valve |
| CN103485959A (en) * | 2013-10-14 | 2014-01-01 | 国家电网公司 | Sealing device of servomotor lock end cover |
| CN105464881A (en) * | 2015-12-22 | 2016-04-06 | 国家电网公司 | Non-synchronous guide vane servomotor free of cylinder falling |
| CN107701347A (en) * | 2017-09-30 | 2018-02-16 | 湖南云箭集团有限公司 | Bulb through-flow turbine group |
| CN110566392A (en) * | 2019-09-19 | 2019-12-13 | 湖南云箭集团有限公司 | External rotating wheel servomotor structure |
-
2008
- 2008-04-29 CN CNU2008200345308U patent/CN201196127Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985914A (en) * | 2010-12-01 | 2011-03-16 | 常州液压成套设备厂有限公司 | Hydraulic servomotor for hydroelectric generating set |
| CN101985914B (en) * | 2010-12-01 | 2012-07-18 | 常州液压成套设备厂有限公司 | Hydraulic servomotor for hydroelectric generating set |
| CN102494165A (en) * | 2011-11-29 | 2012-06-13 | 上海汇益控制系统股份有限公司 | Piston type crisis intercepter valve |
| CN103485959A (en) * | 2013-10-14 | 2014-01-01 | 国家电网公司 | Sealing device of servomotor lock end cover |
| CN103485959B (en) * | 2013-10-14 | 2015-11-11 | 国家电网公司 | Servomotor lock ingot end cover sealing device |
| CN105464881A (en) * | 2015-12-22 | 2016-04-06 | 国家电网公司 | Non-synchronous guide vane servomotor free of cylinder falling |
| CN107701347A (en) * | 2017-09-30 | 2018-02-16 | 湖南云箭集团有限公司 | Bulb through-flow turbine group |
| CN110566392A (en) * | 2019-09-19 | 2019-12-13 | 湖南云箭集团有限公司 | External rotating wheel servomotor structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090218 Termination date: 20120429 |