CN102410374A - Sealing structure of tapered slip ring with self-compensating property - Google Patents
Sealing structure of tapered slip ring with self-compensating property Download PDFInfo
- Publication number
- CN102410374A CN102410374A CN2011103729700A CN201110372970A CN102410374A CN 102410374 A CN102410374 A CN 102410374A CN 2011103729700 A CN2011103729700 A CN 2011103729700A CN 201110372970 A CN201110372970 A CN 201110372970A CN 102410374 A CN102410374 A CN 102410374A
- Authority
- CN
- China
- Prior art keywords
- slip ring
- ring
- runddichtringo
- taper
- sealing
- 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
Images
Landscapes
- Sealing Devices (AREA)
Abstract
The invention discloses a sealing structure of a tapered slip ring with a self-compensating property, which comprises a tapered slip ring, an O-ring, a cylinder barrel and a shaft sleeve, wherein the O-ring is arranged in a sealing ring groove of the cylinder barrel; a mobile annular retaining ring is arranged between the O-ring; the tapered slip ring is arranged between the cylinder barrel and the shaft sleeve and the cross section is a right triangle; an elastic element is arranged on the end face of the slip ring; the tapered slip ring moves rightward along the inclined plane of the shaft sleeve under the action of the elastic element and the internal pressure; the O-ring is extruded when the slip ring moves rightward; the deformed O-ring reacts on the slip ring as the diameter compression ratio of the cross section changes along with the internal pressure of a sealing cavity; and the contact pressure on the dynamic sealing surface of the slip ring is wavy to form serrated sealing effect. The sealing structure has simple structure, low cost and good sealing performance. The wear loss can be automatically compensated by the tapered slip ring, the problem of wear is fundamentally solved, the stress condition of the O-ring is improved, and the service life of the O-ring is prolonged.
Description
Technical field
The present invention relates to the dynamic seal apparatus technical field, especially relate to a kind of taper bearing ring seal structure with self compensation property.
Background technique
Development along with industrial technology; The mechanical seal application constantly enlarges; Not only the pump valve adopts; Various manufacturing equipments (reaction kettle, stirrer etc.) also are widely used, and running to extremes of Environmental Conditions, and high parameter (high pressure, at a high speed, high temperature, major diameter), high-performance (dried running, zero leakage, dreg slurry etc.) improve constantly.Traditional mechanical seal structure is difficult to satisfy the requirement of technology.
Present existing slip ring combined sealing structure (like square co-axial seals, C shape slip ring combination seal, right angle slip ring combination seal, stepped shaft co-axial seals, profile of tooth slip ring combination seal and pin shape slip ring combination seal etc.) is the sealing configuration that a slip ring is installed between O RunddichtringO and slip surface, and its sealing function is through the elastic restoring force after the O RunddichtringO storage strain energy slip ring to be close on the slip surface to realize.Slip ring generally adopts polytetrafluoroethylene (PTFE); Because of it has and the metal non-adhesiveness, the Applicable temperature scope is big, and friction factor is little; Advantages such as the starting friction resistance after resting does not for a long time rise basically, the sliding ring type combination seal is widely used in field of sealing technology.But it is poor that conventional slip ring structure " is followed compensatory ", and leakage rate is bigger 2～3 times than conventional rubber seal after the long-term work, even bigger.Chinese scholars has carried out how reducing in a large number the research work of sliding ring type combination seal leakage rate, has researched and developed multiple slip-ring seal structure.These research work; Basically all be to launch around slip ring structure characteristic and slip ring material; Structure characteristic mainly concentrates on both direction; The one, attenuate slip ring thickness (like square co-axial seals, C shape slip ring combination seal, right angle slip ring combination seal etc.), the 2nd, reduce the area of contact (like stepped shaft co-axial seals, profile of tooth slip ring combination seal, pin shape slip ring combination seal etc.) of slip ring and slip surface; The slip ring investigation of materials then is in teflon, to fill a certain proportion of other materials, to improve the mechanical property of teflon.Document " design and analysis of calcium carbide reaction oblique cone slip ring combination sealing arrangement " (Machine Design and manufacturing; 2010.10); The oblique cone slip ring combination seal of development; Compensation problem and O RunddichtringO that this structure can solve after the slip ring wearing and tearing are prone to problem of aging, but this structure is only applicable to low pressure seal, can not satisfy the mesohigh seal request.
Analyze after deliberation, all there are two point defects in the various forms of slip ring combination seals of development at present:
1, fail thoroughly to solve wear problem, " following compensatory " is poor
Have motive sealing face in the slip ring combination seal seal process, through using for a long time, wearing and tearing are inevitably, and especially under higher contact pressure state, the slip ring wearing and tearing are not allowed to ignore.The slip ring attenuate designs and reduces all to have increased with the design of slip surface area of contact the influence degree of wearing and tearing, and along with the increase of slip ring wear extent, the thickness of slip ring is attenuate trend monotonously change between O RunddichtringO and the slip surface, causes sealing effect to descend gradually.
2, the method for using of O RunddichtringO is prone to cause the shortening in its working life
At present, nearly all sliding ring type combination seal all is the same to the method for using of O RunddichtringO.The O RunddichtringO has certain precompression distortion when installing, the pressure effect produces secondary deformation in receiving in the seal process, and the elastic restoring force through the O RunddichtringO is close on the slip surface slip ring and is sealed.The diameter of section compressibility of O RunddichtringO all is in constant state from beginning is installed, and when pre compressed magnitude is big, the O RunddichtringO will be in compression state always, and material is prone to aging and elasticity is not enough, causes sealing effect decline.
To the problems referred to above; Study and a kind ofly fundamentally solve wear problem and improve O RunddichtringO force-bearing situation; The sliding ring type combination seal that has " following compensatory " characteristics after the slip ring wearing and tearing has breakthrough meaning; To press in the sealing that improves the taper combination seal, satisfy the demand of the high inner pressuring sealing of centering in the industry.
Summary of the invention
The objective of the invention is to overcome the shortcoming that exists in the existing technology; A kind of mesohigh medium-tight field that is applied to is provided; Be particularly useful for operating modes such as serious wear, the interior pressure request height of sealing, can fundamentally solve the taper bearing ring seal structure that wear problem and the good awl of O RunddichtringO force-bearing situation have self compensation property.
In order to achieve the above object; Of the present invention through following technological scheme realization: a kind of taper bearing ring seal structure with self compensation property comprises taper slip ring, O RunddichtringO, cylinder barrel and axle sleeve; Wherein the O RunddichtringO is installed in the seal groove of cylinder barrel; Its group number is no less than 2, and is provided with diameter of section size and the measure-alike annular retaining ring of seal groove groove depth between the O RunddichtringO, and annular retaining ring can move axially along cylinder barrel with the O RunddichtringO; Described taper slip ring between cylinder barrel and axle sleeve, its cross section triangle that meets at right angles, slip ring face and the O RunddichtringO at horizontal edge place join, the slip ring face at hypotenuse place is to contact with boss face, the slip ring end face that vertical edge belongs to is provided with elastic element.Elastic element initially has pre compressed magnitude; The taper slip ring moves right on the axle sleeve inclined-plane, effect lower edge of spring force and interior pressure force; Owing to the cuff effect is close on the sliding sealing surface, extruding O RunddichtringO when slip ring moves right, its diameter of section compressibility changes with pressing in the Seal cage; O RunddichtringO after the distortion reacts on slip ring; Make slip ring be fluctuating shape distribution formation profile of tooth sealing effect, promptly on motive sealing face, form the continuous seal district, thereby realize sealing preferably because of the contact pressure on its motive sealing face.
As optimization, described elastic element is made up of the spring that is no less than 2 groups, and spring circumferentially evenly distributes along taper slip ring end face, makes the taper slip ring stressed more even when guaranteeing elastic element to the end-acted power of taper slip ring.
As optimization, the described diameter of respectively organizing the O RunddichtringO is all identical with diameter of section, and along the cylinder barrel axial arranging, guaranteeing producing identical amount of deformation when respectively organizing the O RunddichtringO is squeezed, thereby helps forming continuous seal area at sealing surface.
Compared with prior art, beneficial effect of the present invention is embodied in the following aspects:
1, guaranteeing to have improved slip ring thickness under the sealing effect prerequisite, reduces expenses such as slip ring manufacturing, maintenance, improved the Sealing impact resistance;
2, O RunddichtringO diameter of section compressibility changes with pressing in the Seal cage, has optimized the stress of O RunddichtringO in Seal, has prolonged the working life of O RunddichtringO;
3, the harmful effect of slip ring wearing and tearing to sealing effect avoided in taper slip ring friction compensation loss automatically under the sealed motive force effect.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a sectional view of the present invention;
Fig. 2 is that the O RunddichtringO reaches the pressure-plotting on the preceding slip ring of maximum cross-section diameter compressibility;
Fig. 3 is that the O RunddichtringO reaches the pressure-plotting on the slip ring after the diameter compressibility of maximum cross-section.
Mark among the figure: taper slip ring 1, O RunddichtringO 2, cylinder barrel 3, axle sleeve 4, seal groove 5, annular retaining ring 6, elastic element 7.
Embodiment
Disclosed all characteristics in this specification, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
As shown in fig. 1; A kind of taper bearing ring seal structure with self compensation property comprises taper slip ring 1, O RunddichtringO 2, cylinder barrel 3 and axle sleeve 4, and wherein O RunddichtringO 2 is installed in the seal groove 5 of cylinder barrel 3, and its group number is no less than 2; And be provided with the measure-alike annular retaining ring 6 of diameter of section size and seal groove 5 groove depths between the O RunddichtringO 2; Edges join with the seal groove 5 of cylinder barrel 3 in the annular retaining ring 6, and promptly the outer of annular retaining ring 6 does not exceed the notch of seal groove 5, and can move axially along cylinder barrel with O RunddichtringO 2; Its thickness is attenuate as far as possible, and concrete size and manufactured materials can design as the case may be.Taper slip ring 1 between cylinder barrel 3 and axle sleeve 4, its cross section triangle that meets at right angles, the slip ring face and the O RunddichtringO 2 at horizontal edge place join; The slip ring face at hypotenuse place is to contact with 4 on axle sleeve, and the slip ring end face at vertical edge place is provided with elastic element 7, and taper slip ring 1 can move along axle sleeve 4 inclined-planes; The elastic element of being selected for use 7 is made up of the spring that is no less than 2 groups; And spring circumferentially evenly distributes along taper slip ring 1 end face, and number of springs increases as far as possible, during installation; Elastic element 7 needs certain preparatory contact pressure; Therefore the pre compressed magnitude of forming every spring of elastic element 7 must be consistent, and respectively organize the seal ring that O RunddichtringO 2 is selected same diameter size and diameter of section size for use, and along the cylinder barrel axial arranging; Produce identical amount of deformation when guaranteeing that respectively organize O RunddichtringO 2 is squeezed, thereby help forming continuous seal area at sealing surface.
The present invention is an example with the taper combined sealing structure of 2 O RunddichtringOs, in conjunction with Fig. 1, Fig. 2 and Fig. 3 working principle of the present invention is described.
Power of the present invention is made up of spring force on taper slip ring 1 left surface and interior pressure; Taper slip ring 1 moves right on these axle sleeve 4 inclined-planes, force action lower edge; Because the cuff effect, taper slip ring 1 is close on the sliding sealing surface, extruding O RunddichtringO 2 when taper slip ring 1 moves right; O RunddichtringO 2 after the distortion reacts on taper slip ring 1; Make taper slip ring 1 form the profile of tooth sealing effect, this shows that taper slip ring 1 combination seal is to realize sealing by the axial displacement of taper slip ring 1 and O RunddichtringO radial deformation because of the contact pressure on its motive sealing face is the distribution of fluctuating shape.Adopt force balance principle to analyze taper slip ring 1 combination seal working mechanism below and since frictional force relatively on each face positive pressure less, so carrying out stress balance negligible friction when analyzing.
With the increase of pressing in the Seal cage, taper slip ring 1 moves right, and O RunddichtringO 2 diameter of section compressibilitys increase gradually.Assuming a radial displacement of the conical slip ring is
time (ie O-ring 2 has just reached the set maximum cross-sectional diameter of the compression ratio) seal chamber pressure of
.When pressing in the Seal cage less than
; Pressure distribution on taper slip ring 1 each face is as shown in Figure 2; When pressing greater than
in the Seal cage, the pressure distribution on taper slip ring 1 each face is as shown in Figure 3.Among the figure: the pressure that
-elastic element provides when installing; Press the well-distributed pressure that provides in
-Seal cage;
,
-be respectively left side and right side O RunddichtringO 2 extruding forces;
-slipper seal surface contact pressure;
-block circle actuating pressure,
-cylinder barrel actuating pressure.Static seal face seal condition is
or
; Can reach the selfsealings effect under the effect that O RunddichtringO 2 is pressed in the extruding of taper slip ring 1 and Seal cage, the condition of motive sealing face seal is
.
During as
, taper slip ring 1 EQUILIBRIUM CONDITION does
When this state of equilibrium, motive sealing face upward pressure does
During as
, taper slip ring 1 EQUILIBRIUM CONDITION does
When this state of equilibrium, motive sealing face upward pressure does
In the formula:
is respectively the left side O RunddichtringO 2 extruding force dispersions of distribution, the right side O RunddichtringO 2 extruding force dispersions of distribution, is in taper slip ring 1 width, annular retaining ring 6 pressure distribution width and cylinder barrel 3 pressure distribution width in the Seal cage;
is taper slip ring 1 cross section hypotenuse length, and all the other parameters are seen shown in Figure 1.
The long-term use; 1 wearing and tearing of taper slip ring; Gap between O RunddichtringO 2 and axle sleeve 4 slip surfaces increases; Cause
,
,
and
to reduce; Formula (1) and (3) left side be greater than the right, and taper slip ring 1 will move right and equate up to the formula both sides and arrive a new equilibrium position.High or the reduction of voltage rise in the sealing; The then corresponding left side in formula (1) and (3) is greater than or less than the right; Taper slip ring 1 also with to the right corresponding or be moved to the left up to the formula both sides and equate and arrive a new equilibrium position, presses in O RunddichtringO diameter of section compressibility is corresponding to change and change.
Composite formula (1) and (2) or formula (3) and (4) all obtain
（5）
Suppose that contact pressure evenly distributes on the motive sealing face; Be
, then
（6）
Because the extruding force non-uniform Distribution of taper slip ring 1 outer surface; And the non-vertically equal thickness of taper slip ring 1; Then cause some sections
, some sections
.So, on motive sealing face, exist some sections to reach motive sealing condition
all the time.The automatic compensate for wear amount of taper slip ring has fundamentally solved wear problem among the present invention, has significantly improved O RunddichtringO force-bearing situation simultaneously, has improved the working life of O RunddichtringO.That the present invention also has is simple in structure, cost is low, and advantages such as good seal performance are particularly suited in serious wear, the sealing promoting the use of under the operating modes such as pressure request height.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (3)
1. taper bearing ring seal structure with self compensation property; It is characterized in that: comprise taper slip ring, O RunddichtringO, cylinder barrel and axle sleeve; Wherein the O RunddichtringO is installed in the seal groove of cylinder barrel; Its group number is no less than 2, and is provided with the annular retaining ring of diameter of section size and seal groove groove depth consistent size between the O RunddichtringO, and annular retaining ring can move axially; Described taper slip ring between cylinder barrel and axle sleeve, its cross section triangle that meets at right angles, slip ring face and the O RunddichtringO at horizontal edge place join, the slip ring face at hypotenuse place is to contact with boss face, the slip ring end face that vertical edge belongs to is provided with elastic element.
2. a kind of taper bearing ring seal structure with self compensation property according to claim 1, it is characterized in that: described elastic element is made up of the spring that is no less than 2 groups, and spring circumferentially evenly distributes along taper slip ring end face.
3. a kind of taper bearing ring seal structure with self compensation property according to claim 1 is characterized in that: the described diameter of respectively organizing the O RunddichtringO is all identical with diameter of section, and along the cylinder barrel axial arranging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103729700A CN102410374A (en) | 2011-11-22 | 2011-11-22 | Sealing structure of tapered slip ring with self-compensating property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103729700A CN102410374A (en) | 2011-11-22 | 2011-11-22 | Sealing structure of tapered slip ring with self-compensating property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102410374A true CN102410374A (en) | 2012-04-11 |
Family
ID=45912611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103729700A Pending CN102410374A (en) | 2011-11-22 | 2011-11-22 | Sealing structure of tapered slip ring with self-compensating property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102410374A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711910A (en) * | 2013-12-10 | 2014-04-09 | 合肥通用机械研究院 | Self-compensating emergency combined seal for nuclear reactor main circulating pump sealing device |
| CN105058581A (en) * | 2015-09-16 | 2015-11-18 | 成都爆米花信息技术有限公司 | Horizontal sealing stirring machine |
| CN105082356A (en) * | 2015-09-16 | 2015-11-25 | 成都爆米花信息技术有限公司 | Horizontal mixer |
| CN105402412A (en) * | 2015-12-30 | 2016-03-16 | 鞍山森远路桥股份有限公司 | Detachable type sealing ring assembly applied to rotating shaft |
| CN105686160A (en) * | 2016-03-17 | 2016-06-22 | 中国人民解放军第三军医大学第附属医院 | Surgical smoke preventing mask |
| CN107387391A (en) * | 2017-07-25 | 2017-11-24 | 盐城美希密封件有限公司 | A kind of static seal device of auto pump |
| CN109139916A (en) * | 2018-11-13 | 2019-01-04 | 东台市岳东橡胶密封件厂 | A kind of flexible compensation formula marine screw shaft sealing device |
| CN109357017A (en) * | 2018-11-13 | 2019-02-19 | 东台市岳东橡胶密封件厂 | A kind of two-way abutting formula marine screw shaft sealing device |
| CN110043663A (en) * | 2019-04-17 | 2019-07-23 | 南通广兴气动设备有限公司 | A kind of sealing ring |
| CN110699898A (en) * | 2019-09-10 | 2020-01-17 | 何嘉豪 | Vertical broken wool collection device who places |
| CN111094814A (en) * | 2017-09-20 | 2020-05-01 | 伊格尔工业股份有限公司 | Mechanical sealing element |
| CN111536235A (en) * | 2020-06-11 | 2020-08-14 | 博纳斯威阀门股份有限公司 | Sawtooth sealing ring |
| CN112012800A (en) * | 2020-08-18 | 2020-12-01 | 清华大学 | Seal structure of grid tray and braid combination |
| CN113136813A (en) * | 2021-04-24 | 2021-07-20 | 福建榕鸿建设有限公司 | Pier reinforced structure |
| CN113243949A (en) * | 2021-06-30 | 2021-08-13 | 上海导向医疗系统有限公司 | Biopsy rotary-cut device |
| CN115217975A (en) * | 2022-07-22 | 2022-10-21 | 西安近代化学研究所 | Sealing device for converting axial force into radial extrusion fitting force |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634055A (en) * | 1992-07-13 | 1994-02-08 | Mitsubishi Heavy Ind Ltd | Shaft sealing device |
| CN201794774U (en) * | 2010-08-03 | 2011-04-13 | 宁波伏尔肯机械密封件制造有限公司 | Mechanical sealing device for hot water pump |
-
2011
- 2011-11-22 CN CN2011103729700A patent/CN102410374A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634055A (en) * | 1992-07-13 | 1994-02-08 | Mitsubishi Heavy Ind Ltd | Shaft sealing device |
| CN201794774U (en) * | 2010-08-03 | 2011-04-13 | 宁波伏尔肯机械密封件制造有限公司 | Mechanical sealing device for hot water pump |
Non-Patent Citations (2)
| Title |
|---|
| 胡勇等: "电石反应器斜锥滑环组合密封装置的设计与分析", 《机械设计与制造》 * |
| 车恒德: "车恒德R密封及其应用", 《机床与液压》 * |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711910B (en) * | 2013-12-10 | 2015-11-25 | 合肥通用机械研究院 | Self-compensating emergency combined seal for nuclear reactor main circulating pump sealing device |
| CN103711910A (en) * | 2013-12-10 | 2014-04-09 | 合肥通用机械研究院 | Self-compensating emergency combined seal for nuclear reactor main circulating pump sealing device |
| CN105058581A (en) * | 2015-09-16 | 2015-11-18 | 成都爆米花信息技术有限公司 | Horizontal sealing stirring machine |
| CN105082356A (en) * | 2015-09-16 | 2015-11-25 | 成都爆米花信息技术有限公司 | Horizontal mixer |
| CN105402412A (en) * | 2015-12-30 | 2016-03-16 | 鞍山森远路桥股份有限公司 | Detachable type sealing ring assembly applied to rotating shaft |
| CN105402412B (en) * | 2015-12-30 | 2017-04-05 | 鞍山森远路桥股份有限公司 | For the detachable sealing ring component in rotary shaft |
| CN105686160A (en) * | 2016-03-17 | 2016-06-22 | 中国人民解放军第三军医大学第附属医院 | Surgical smoke preventing mask |
| CN107387391A (en) * | 2017-07-25 | 2017-11-24 | 盐城美希密封件有限公司 | A kind of static seal device of auto pump |
| CN111094814A (en) * | 2017-09-20 | 2020-05-01 | 伊格尔工业股份有限公司 | Mechanical sealing element |
| CN109139916A (en) * | 2018-11-13 | 2019-01-04 | 东台市岳东橡胶密封件厂 | A kind of flexible compensation formula marine screw shaft sealing device |
| CN109357017A (en) * | 2018-11-13 | 2019-02-19 | 东台市岳东橡胶密封件厂 | A kind of two-way abutting formula marine screw shaft sealing device |
| CN110043663A (en) * | 2019-04-17 | 2019-07-23 | 南通广兴气动设备有限公司 | A kind of sealing ring |
| CN110699898A (en) * | 2019-09-10 | 2020-01-17 | 何嘉豪 | Vertical broken wool collection device who places |
| CN111536235A (en) * | 2020-06-11 | 2020-08-14 | 博纳斯威阀门股份有限公司 | Sawtooth sealing ring |
| CN112012800A (en) * | 2020-08-18 | 2020-12-01 | 清华大学 | Seal structure of grid tray and braid combination |
| CN113136813A (en) * | 2021-04-24 | 2021-07-20 | 福建榕鸿建设有限公司 | Pier reinforced structure |
| CN113243949A (en) * | 2021-06-30 | 2021-08-13 | 上海导向医疗系统有限公司 | Biopsy rotary-cut device |
| CN113243949B (en) * | 2021-06-30 | 2021-11-12 | 上海导向医疗系统有限公司 | Biopsy rotary-cut device |
| CN115217975A (en) * | 2022-07-22 | 2022-10-21 | 西安近代化学研究所 | Sealing device for converting axial force into radial extrusion fitting force |
| CN115217975B (en) * | 2022-07-22 | 2024-05-10 | 西安近代化学研究所 | Sealing device for converting axial force into radial extrusion bonding force |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102410374A (en) | Sealing structure of tapered slip ring with self-compensating property | |
| CN100567927C (en) | A kind of energy-saving hydraulic sealing experimental bench and method thereof | |
| CN107366747B (en) | A kind of adjustable rubber-moulding sealing structure of compression ratio | |
| US9206900B2 (en) | Assembly for sealing a sliding interface | |
| CN103047506B (en) | Seal cage is set to the pipeline compensator on inclined-plane | |
| WO2018059249A1 (en) | Axial lip sealing device for rotating shaft | |
| WO2020093270A1 (en) | Pressing-type marine threaded drill pipe | |
| CN102889388B (en) | Self-adapted sealing device of piston of hydraulic cylinder | |
| WO2010115010A3 (en) | Positive displacement machine piston with wavy surface form | |
| CN207333705U (en) | A kind of adjustable rubber-moulding sealing structure of compression ratio | |
| CN201173188Y (en) | Double end-face mechanical sealing structure for high speed screw compressor | |
| CN212479762U (en) | Integrated sealing device for piston | |
| CN201972738U (en) | Star-spin rotating device with double sun wheels, engine and fluid machinery | |
| CN103062564B (en) | A kind of method improving pipeline compensator stuffing box packing uniformity | |
| CN106402170A (en) | Double-thrust-bearing device for motor protector of electric submersible pump unit | |
| CN221739567U (en) | Mandrel suitable for serial assembly of various expansion rings | |
| RU2308626C2 (en) | Sealing ring for movable and fixed joints | |
| CN102218494A (en) | Hydraulic rapid forging press | |
| CN108194502B (en) | Assembly process of combined shaft-connected double-row full-complement ball bearing | |
| CN110681767A (en) | Inner ring hydraulic expanding mechanism | |
| CN102278367B (en) | Biphase heavy-duty thrust bearing | |
| CN215257563U (en) | Device for forcing end face of riding wheel to bear force | |
| KR950008820B1 (en) | Sealing device | |
| CN202225447U (en) | Automatic press joint device of forming machine | |
| RU2265767C1 (en) | Pressurizing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120411 |