CN1039475A - Self-closed parking sealer with outer power self-closed - Google Patents
Self-closed parking sealer with outer power self-closed Download PDFInfo
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- CN1039475A CN1039475A CN88105923A CN88105923A CN1039475A CN 1039475 A CN1039475 A CN 1039475A CN 88105923 A CN88105923 A CN 88105923A CN 88105923 A CN88105923 A CN 88105923A CN 1039475 A CN1039475 A CN 1039475A
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- sealing lip
- stationary ring
- parking sealer
- plane
- lip
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- Sealing With Elastic Sealing Lips (AREA)
Abstract
The present invention is the parking sealer in the contactless dynamic seal, by sealing lip, mass, link, compensating part and fastener molding moulding.Closely amplexis is on the external cylindrical surface of stationary ring for sealing lip, and fastening piece is fixedly mounted in the rotating shaft.When machine run, this parking sealer and axle rotation synchronously are because centrifugal action, sealing lip and stationary ring disengage, and when the machine stall, sealing lip resets under the effect of self elastic force, and in Seal cage, under the hydrostatic pressure effect, form reliable parking sealer.Characteristics such as this parking sealer long service life, sealing is reliable, installation and maintenance are convenient, simple in structure, easy to manufacture.
Description
The invention belongs to the parking sealer in the contactless dynamic seal.
For the machine that uses contactless dynamic seal when stopping, the fixed block that liquid penetrates with it from revolving part to run through the part leakage be a very headachy problem.In order to address this problem, people once used packing seal and differential end face seal as parking sealer, but because these sealings exist obvious defects, so people are seeking a kind of better parking sealer form always.The Chinese patent communique discloses a application for a patent for invention, and application number is 87100110, and its structure as shown in Figure 2.This patent application has disclosed a kind of novel parking sealer, forms by elastic material is molded, and the support of sealing partly is installed in pays on the impeller, and the seal lip portion of sealing is encircled the outer cylinder surface in stationary ring.When machine run, pay impeller and drive the parking sealer rotation, because action of centrifugal force, the external cylindrical surface of sealing lip and stationary ring disengages, and at this moment, prevents that the task of leak of liquid from finishing by paying impeller.When machine stopped operating, the sealing lip of parking sealer restored to the original state under the resilient force of self, encircled on the external cylindrical surface of stationary ring, formed to stop the sealing of leak of liquid to be paid.Between stationary ring and fixed block, also be provided with simultaneously " O " RunddichtringO.This patent application has disclosed a kind of new sealing thought, has started new sealing means, for the technical development of parking sealer contributes.But disclosed parking sealer of this patent application and imperfection, as long as analyze a little, we just can find the deficiency of its existence.One makes the sealing lip of this parking sealer produce the centrifugal force of radial displacement, only is the quality of sealing lip self, again because the quality of sealing lip is less and diameter is limited, therefore, have only machine to reach enough rotating speeds, sealing lip could break away from the external cylindrical surface of stationary ring.Promptly at the start-up course and the docking process of machine, the outer cylinder surface friction time of sealing lip and stationary ring is long, serious wear, and promptly the life-span of sealing is short.Because this parking sealer is to be contained in to pay on the impeller, belong to built-in type again, the disassembling, assembling and replacing trouble is not easy to maintenance.Its two, the installing space of parking sealer is subjected to pay the restriction of impeller, has only when paying impeller greatly the time, could pacify can hold the parking sealer with certain radial dimension, that is to say that the application area of this parking sealer is subjected to certain restriction.Its three, this parking sealer removes the seal point that itself is had, and promptly between sealing lip and the stationary ring and outside the installation periphery of annular supporter, has also increased the seal point between a stationary ring and the fixed block, as " O " RunddichtringO in the accompanying drawing two.Promptly many leakage channels have increased the sealing position.And any one causes seal break-off because of burn into is aging, extruding etc., all causes whole parking sealer to lose efficacy.The sealing at the installation periphery place of especially annular supporter, because the diameter of sealing surface is big, it is more difficult to obtain sealing reliably.That is to say the poor reliability of this parking sealer.They are four years old, because whole parking sealer is immersed in the liquid medium, certainly will will be subjected to the burn into of the medium influence of washing away and increase the possibility of destruction, particularly strong when the corrosivity of medium, contain solid impurity or temperature when higher, the influence that is subjected to is even more serious, and the life-span of sealing will reduce widely.
The objective of the invention is to avoid above-mentioned deficiency of the prior art, and provide a kind of sealability reliable, long service life, applied range, easily mounting or dismounting change, parking sealer easy to maintenance.
Purpose of the present invention can realize by following technical measures:
The annular seal lip amplexis is paid in the external cylindrical surface formation sealing of stationary ring, fastening piece is installed on the revolving part, and circular connector and annular compensating part are set between annular seal lip and annular fastener, can all dispose mass on the outer peripheral surface of circular connector with claiming, by the mutually corresponding molded integral body that becomes of whippy material, be loaded on the outside of the fixed block that revolving part penetrates outward.If fastening piece is fixedly mounted in the rotating shaft, stationary ring is arranged on the fixed block outside that rotating shaft penetrates, and closely amplexis is on the external cylindrical surface of stationary ring for sealing lip, and the internal diameter of fastening piece is not more than the lip limit internal diameter of sealing lip, better effects if then of the present invention.
The mass setting whether and mass adopt the material of what proportion, depend on factors such as the diameter of rotating shaft and rotating speed.The form of mass can be spherical, it also can be cylindrical or other form, but no matter be the mass of what form, the barycenter of mass should be in one plane, and this centroidal planes should be between the plane, lip limit of the plane of cutting sealing lip and sealing lip.Like this, can obtain better sealing effect.
Sealing principle of the present invention and seal-moving process are such, and fastening piece is with enough magnitude of interference or utilize other locking element to be fixedly mounted in the rotating shaft.Under static state, sealing lip with suitable magnitude of interference closely amplexis on the external cylindrical surface of stationary ring.When rotating shaft is rotated, because the centrifugal force that mass, circular connector and sealing lip itself produce, make sealing lip produce certain radial displacement and disengage with stationary ring, avoid fretting wear and the power consumption that rubs.Compensated loop is radially upheld the influence that compensation centrifugal force produces fastening piece with it simultaneously, thereby fastening piece is anchored in the rotating shaft all the time.When the rotating shaft deceleration stopped operating, centrifugal force disappeared, and under the resilient force of material, compensated loop restores to the original state, and sealing lip resets.Simultaneously, because the wall of sealing lip becomes certain included angle with the axis of stationary ring, hydrostatic pressure acts on the internal face of sealing lip in the Seal cage, sealing lip is held tightly voluntarily, to form reliable parking sealer on stationary ring.But, want to make parking sealer to obtain desirable self-tightening effect and enough intensity, two walls of sealing lip and the angle of stationary ring axis should be within certain scopes, usually a side wall surface that contacts with liquid and the angle of stationary ring axis are 20 ° to 45 °, when the angle of opposite side wall and stationary ring axis is 20 ° to 30 °, just can obtain desirable self-tightening effect and enough intensity.
The present invention compared with prior art mainly has the following advantages:
1. because the present invention is the parking sealer of external mounted, be not subjected to pay the restriction of impeller size, thus applied range, simultaneously, do not need centering and centering during assembling, be easy to disassembling, assembling and replacing, be convenient to maintenance.
2. owing to be provided with suitable mass on the circular connector excircle, therefore the cylndrical surface of sealing lip and stationary ring is disengaged, the fretting wear of sealing lip is greatly reduced, improve the working life of parking sealer.
3. the present invention has only between sealing lip and the stationary ring and two seal points between fastening piece and the rotating shaft, has lacked the seal point between a stationary ring and the fixed block compared to prior art, i.e. " O " RunddichtringO in the accompanying drawing two.Reduced by a seal point, that is to say and reduced by a channel that may leak.And fastening piece is with enough magnitude of interference or utilize other locking element to be fixedly mounted in the rotating shaft.Therefore, the sealing at this place is very reliable.The reliability that is to say this parking sealer is big.
4. because this parking sealer is an external mounted, has only contact medium in the Seal cage, than the built-in type parking sealer that is fully immersed in the liquid medium, operating conditions obtains comparatively satisfied improvement, made by same material, under the identical operating conditions, the life-span is longer.
5. the present invention can be by elastic material mold pressing once-through, and easy to manufacture, cost is low.
The present invention is used with paying impeller, can obtain very good sealing effect, can replace existing various forms of liquid seal, can be widely used in the machines such as liquid delivery pump, stirrer.
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is that number of patent application is 87100110 parking sealer structural representation.
Below in conjunction with the explanation of accompanying drawing 1, provide a most preferred embodiment of the present invention.
Accompanying drawing 1 is the present invention and pay the embodiment that impeller matches and uses on liquid delivery pump.In the drawings, (1) is annular seal lip, with appropriate magnitude of interference closely amplexis on the external cylindrical surface of stationary ring (6).The side wall surface that sealing lip contacts with liquid and the angle of stationary ring axis are 25 °, and the angle of opposite side wall and stationary ring axis is 20 °.Stationary ring (6) is that the overhanging end of utilize paying on the impeller cavity bonnet processes, and (2) are spherical mass, all be configured on the outer peripheral surface of circular connector (3) with claiming, and the centroidal planes of weighted spherical ball basically with the lip limit planes overlapping of sealing lip (1).(4) be annular compensating part, its section is arc, and compensation effect is better.Fastening piece (5) is sleeved in the rotating shaft (7) securely with enough magnitude of interference.(8) be the impeller of paying that the present invention matches with it and uses.(9) be the back blade of impeller.The effect of paying impeller (8) and back blade (9) all is that the liquid in the pump chamber is produced back-pressure, and the liquid top of desiring along the clearance leakage between rotating shaft and pair impeller bonnet is got back in the pump chamber, promptly forms dynamic seal.
Claims (9)
1, a kind ofly is used to prevent the parking sealer of liquid along the clearance leakage between revolving part and the fixed block, comprise that self-energizing annular seal lip (1) amplexis is on the external cylindrical surface of stationary ring (6), fastening piece (5) is installed on the revolving part, it is characterized in that between sealing lip (1) and fastening piece (5), circular connector (3) being set, annular compensating part (4), on the outer peripheral surface of circular connector mass (2) can be set with all claiming, mutually corresponding molded and shaped by whippy material, be contained in the outside of the fixed block that revolving part penetrates outward.
2, parking sealer according to claim 1, it is characterized in that fastening piece is fixedly mounted in the rotating shaft, stationary ring (6) is arranged on the outside of the fixed block that rotating shaft penetrates, closely amplexis is on the external cylindrical surface of stationary ring (6) for sealing lip (1), and the internal diameter of fastening piece (5) is not more than the lip limit internal diameter of sealing lip (1).
3,, it is characterized in that the section of said annular compensating part (3) is arc according to claim 1,2 described parking sealers.
4, according to claim 1,2 described parking sealers, it is characterized in that a side wall surface of said sealing lip (1) contact liq becomes 20 ° to 45 ° angles with the axis of stationary ring (6), the opposite side wall becomes 20 ° to 30 ° angles with the axis of stationary ring (6).
5, parking sealer according to claim 3 is characterized in that a side wall surface of said sealing lip (1) contact liq becomes 20 ° to 45 ° angles with the axis of stationary ring (6), and the opposite side wall becomes 20 ° to 30 ° angles with the axis of stationary ring (6).
6,, it is characterized in that mass (2) centroidal planes is between the plane, lip limit of the plane of cutting sealing lip and sealing lip according to claim 1,2 described parking sealers.
7, parking sealer according to claim 3, the centroidal planes that it is characterized in that mass (2) is between the plane, lip limit of the plane of cutting sealing lip and sealing lip.
8, parking sealer according to claim 4, the centroidal planes that it is characterized in that mass (2) is between the plane, lip limit on the plane of cutting sealing lip and sealing lip limit.
9, parking sealer according to claim 5, the centroidal planes that it is characterized in that mass (2) is between the plane, lip limit on the plane of cutting sealing lip and sealing lip limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88105923A CN1039475A (en) | 1988-07-16 | 1988-07-16 | Self-closed parking sealer with outer power self-closed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88105923A CN1039475A (en) | 1988-07-16 | 1988-07-16 | Self-closed parking sealer with outer power self-closed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1039475A true CN1039475A (en) | 1990-02-07 |
Family
ID=4834040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88105923A Pending CN1039475A (en) | 1988-07-16 | 1988-07-16 | Self-closed parking sealer with outer power self-closed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039475A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678606A (en) * | 2011-03-11 | 2012-09-19 | 张家港市飞浪泵阀有限公司 | High-alloy wear-resistance shaft sleeve combined device |
| CN104019052A (en) * | 2014-05-13 | 2014-09-03 | 武汉聿桥泵业科技有限公司 | Pump shutdown seal with static rings and dynamic rings externally arranged |
| CN106151100A (en) * | 2016-08-30 | 2016-11-23 | 鸿浩泵业有限公司 | A kind of pump is with paying impeller parking sealing arrangement |
| CN108700197A (en) * | 2015-12-17 | 2018-10-23 | Kaco有限及两合公司 | Radial shaft seals system and for using radial shaft seals system sealing rotating mechanical part method |
-
1988
- 1988-07-16 CN CN88105923A patent/CN1039475A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678606A (en) * | 2011-03-11 | 2012-09-19 | 张家港市飞浪泵阀有限公司 | High-alloy wear-resistance shaft sleeve combined device |
| CN104019052A (en) * | 2014-05-13 | 2014-09-03 | 武汉聿桥泵业科技有限公司 | Pump shutdown seal with static rings and dynamic rings externally arranged |
| CN108700197A (en) * | 2015-12-17 | 2018-10-23 | Kaco有限及两合公司 | Radial shaft seals system and for using radial shaft seals system sealing rotating mechanical part method |
| CN106151100A (en) * | 2016-08-30 | 2016-11-23 | 鸿浩泵业有限公司 | A kind of pump is with paying impeller parking sealing arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |