CN2091373U - Rotary pump axle machinery seal device - Google Patents
Rotary pump axle machinery seal device Download PDFInfo
- Publication number
- CN2091373U CN2091373U CN 91213550 CN91213550U CN2091373U CN 2091373 U CN2091373 U CN 2091373U CN 91213550 CN91213550 CN 91213550 CN 91213550 U CN91213550 U CN 91213550U CN 2091373 U CN2091373 U CN 2091373U
- Authority
- CN
- China
- Prior art keywords
- seal device
- mechanical seal
- seal
- sealing
- cylindrical shell
- 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.)
- Withdrawn
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to an improvement for the mechanical seal of a rotating shaft, characterized in that a sealing pair elastic holding piece adopts an expanding or contractible elastic barrel body along the axial direction; the barrel body is positioned inside a seal casing body communicated with a pump cavity for making the elastic compacting drum body lift along with the medium hydraulic pressure inside the pump cavity and deform toward the axial direction for stretching; the pressing force of the sealing face can be compensated and increased for implementing the self-regulation of the specific pressure of a seal face and ensuring the reliable pinch-off seal of the sealing face. The utility model has the advantages of simple structure, convenient operation, corrosion resistance, fatigue resistance, good sealing performance, long service life, etc., and the utility model can be used for the shaft seal of various rotary pumps and the rotating shaft seal having the unequal pressure on both sides of the axial direction.
Description
Model utility relates to a kind of rotation pump shaft anti-leak mechanical seal device.
A kind of known rotary pump mechanical seal for axle by the rotary packing ring that constitutes sealing pair, stationary seal ring, and connects, acts on the bellows of sealing pair and the elastic pressed piece composition that pressure spring is formed.Its sealing is under the elastic pressed piece effect, by the impacting force of rotating ring sealing surface and stationary ring sealing surface, stops the leakage of flowing medium.The greatest drawback of this seal arrangement is that sealing surface compact power is fixed value, and it can not change with the pump internal pressure adjusts its impacting force, and when superpressure occurring in the pump, sealing surface easily produces because of impacting force is not enough and leaks; Increase sealing surface compact power, make sealing surface surface friction drag strengthen again, not only increased useless dissipation power, and sealing surface weares and teares very easily.Secondly, along with the prolongation of using, spring corrosion and tired causes that easily sealing surface compact power reduces, and makes sealability descend, and produces and leaks.Therefore difficult low power consumption, low wearing and tearing and the high sealing performance of obtaining.In addition, when this seal arrangement is adorned outward, often need add cooling recirculation system, make complex structure in sealing part; During interior the dress, though can omit cooling recirculation system, elastic pressed piece is very easily corrosion again, reduces working life.When pump shut down, as the untimely outlet valve of closing, the backflow fluid column in the pipeline more easily washed out Sealing again.
The purpose of model utility is to overcome the deficiency of above-mentioned prior art, provide a kind of simple in structure, corrosion-resistant and fatigue performance good, and can adjust sealing surface compact power automatically according to the pump internal pressure, sealing surface is reliably compressed all the time, and have the novel mechanical seal arrangement of low power consumption, low wearing and tearing and high sealability.
For achieving the above object, the solution of model utility is to make the elastic pressed piece that acts on the sealing pair change impacting force to sealing surface with medium hydraulic pressure in the pump, make sealing surface under initial impacting force, can increase and strengthen, thereby guarantee reliably compressing of sealing surface with hydraulic pressure.Model utility comprises the sealing pair that is made of rotary packing ring and stationary seal ring specifically, and interconnect function is in the elastic pressed piece of sealing pair, it is characterized in that described elastic pressed piece is to have the elastic cylinder that axially expands or dwindle, this cylindrical shell is surrounded by an enclosing housing, described housing communicates with pump chamber, make described elastic compression cylindrical shell can with medium hydraulic pressure in the pump chamber increase and deformation axially stretch, compensation, increase sealing surface compact power, keep reliably compressing of sealing surface all the time.
The described elastic pressed piece of model utility adopts the elastic strain material to make, and its cylindrical shell that axially expands or dwindle is for having single curved surface such as cydariform cylindrical shell, and one provides initial impacting force of sealing pair; The 2nd, arch, curved surface make cylindrical shell increase with hydraulic pressure in (being subjected to) pump and deformation produce axially and stretch, compensation increases sealing surface compact power.Except that the cydariform cylindrical shell, also can adopt as section is the cylindrical shell that arch, surface such as trapezoidal have single arch, song or spill.Change the arching degree of one-tenth and the lifting surface area of cylindrical shell, can obtain different compensation impacting forces.Elastic cylinder can join with stationary seal ring, also can join with rotary packing ring, and wherein a kind of way preferably is for to join with stationary seal ring., transmits rotary packing ring the twisting that produces because of rotating for eliminating stationary seal ring, anti-groove of turning round and the fin that cooperates with it can be set between stationary seal ring side face and fixed component, as between stationary seal ring and elastic cylinder and between cylindrical shell and housing, or between stationary seal ring and enclosing housing.This groove and fin are axial setting, have both eliminated the radially twisting of stationary seal ring, can guarantee again to produce under cylindrical shell deformation to endwisely slip.Enclosing housing can be that pump case and lid extension form, also can add in addition, described housing has at least a passage to communicate with pump chamber, the interior media fluid of pump chamber is introduced into acts on the elastic cylinder surface, the application cylinder bodily form becomes stretching, extension, the impacting force of adjusting, compensating sealing surface.After making sealing surface wear, compensated timely and effectively, kept former impacting force, be axially arranged with as feed compensations such as nut screw and regulate parts.
Description below in conjunction with drawings and Examples further specifies the utility model.
Figure one is model utility first embodiment's a sectional structure schematic representation.
Figure two is model utility second embodiment's a sectional structure schematic representation.
Figure three is model utility the 3rd embodiment's a sectional structure schematic representation.
Figure four is model utility the 4th embodiment's a sectional structure schematic representation.
Embodiment one: as figure one, on the axle 9 of connection impeller 1, be fixed with rotary packing ring 3, stationary seal ring 11 cards slotting (cover) of fitted seal are fixed on cydariform cylindrical shell 5 one ends that axially expand by the elastic strain material with it, the enclosing housing that cydariform tube and sealing pair are formed by the ring end plate 8 of cylinder cover 2 that is extended by the pump case end and band folding cover 10 is surrounded, and the other end of cydariform cylindrical shell is encircled end plate and fixes.Little feeding adjusting part that ring end plate and cylinder cover are formed by elastic ring 6 and adjusting screw 7 links to each other, and little feeding adjusting part is mainly used in adjusting and applies the compensation after compaction forces and sealing pair wear and tear given on the sealing surface.Stationary seal ring obtains radial locations by the fin 4 of corresponding matching on the groove that axially is provided with on the side face and the sealing thimble, and retainer shaft is rotated the torsion that is transmitted by rotary packing ring to property slidably to eliminate pump shaft.Enclosing housing communicates with pump chamber by road, crack 13, makes shell chamber and pump chamber become isobaric connected component.For improving the cooling effect of sealing pair, also can between pump chamber and enclosing housing, be provided with second groove (hole) road 12, enclosing housing medium liquid can be circulated.
Sealing pair obtains initial sealing by the compaction forces of giving that elasticity cydariform cylindrical shell applies, when medium hydraulic pressure in the pump exists and/or increases, as to the repulsive force of sealing pair greater than initial impacting force, axially stretch because of being subjected to this hydraulic pressure to produce deformation on the surface that cydariform elasticity tube arches upward, compensation increases the impacting force of sealing pair, when this medium hydraulic pressure reduced, the compensation impacting force that the deformation of cydariform elastic cylinder produces also reduced thereupon.Thereby make sealing pair obtain an energy with the adjustable impacting force of medium hydraulic pressure in the pump, and make sealing pair be in a less rational impacting force scope all the time, both guaranteed not produce leakage, sealing pair is moved stably in a long term with less wearing and tearing.
Embodiment two: the abdominal ring 14 that as figure two, elasticity cydariform cylindrical shell 5 one ends have as described above a bending between ring flat-plate 15 ring flat-plates turned up and cylindrical shell (finger pressure contract back), it is fixing that cylindrical shell is closed housing ring end plate 8 by ring flat-plate 15.Initially giving the compaction forces size then adjusts by little feeding adjusting nut 16 of axle both sides.As the sealing pair wearing and tearing, then can stretch deformation and obtain compensation automatically in the using process by abdominal ring.
Embodiment three: as figure three, the cydariform cylindrical shell is for axially dwindling the cylindrical shell that the surface is indent as described above, and cylindrical shell concave bottom portion overlaps 10 spacingly by being placed in folding on the last enclosing housing end casing, and pressurized is caved in, to guarantee the deformation stretching, extension behind the cylindrical shell pressurized.Giving compaction forces size and wear compensation is then provided by the little feeding adjusting nut 16 of axle both end sides.
Embodiment four: as figure four, sealing pair stationary seal ring 11 is fixed on the enclosing housing end casing 8 as described above, rotary packing ring 3 is fastened in cydariform elastic cylinder 5 one ends, and fin and groove (not providing among the figure) acquisition radial location by axially being provided with, the cydariform elastic cylinder the other end is fixed on the impeller 1, constitute the inside seal device, enclosing housing is extended by pump case respectively and end cap constitutes.Giving compaction forces size and wear compensation is then provided by the little feeding adjusting nut 16 of axle both end sides.
Embodiment five: as described above, arch that can the elastic strain material or trapezoidal etc. similar axially expand or dwindle have single curved surface cylindrical shell and replace above-mentioned cydariform elastic cylinder.
Model utility is because the elastic cylinder with single curved surface is axially expanded or dwindles in employing, replace the elastic pressed piece that bellows and spring are formed in the former mechanical seal device, and this sealing compressing member and sealing pair placed enclosing housing, and introduce directly that dielectric fluid is pressed on the elastic pressed piece surface in the pump.Make sealing surface compact power to increase and automatically adjust and strengthen with medium hydraulic pressure, reach the self-regulated of seal face specific pressure, both guaranteed reliable sealing, avoid being prone to the backflow fluid column and wash out Sealing because of shutting down, make the seal face specific pressure be in a rational state all the time again, can reduce the wearing and tearing of sealing pair, prolong its working life, cancel cooling recirculation system simultaneously, simplified structure.Therefore, model utility has simple in structure, and is easy to operate, anti-corrosion, endurance and good seal performance, and characteristics such as long service life not only can be used for the shaft sealing of various rotary pumps, but also can be used for the rotating shaft sealing that other axial both sides have unequal pressure.
Claims (7)
1, a kind of rotating shaft mechanical seal device, comprise the sealing pair that rotary packing ring and stationary seal ring constitute, and the elastic pressed piece that connects, acts on sealing pair, it is characterized in that described elastic pressed piece is to have the elastic cylinder that axially expands or dwindle, this cylindrical shell is surrounded by an enclosing housing, and described housing communicates with pump chamber.
2,, it is characterized in that described elastic cylinder is the cydariform cylindrical shell according to the described mechanical seal device of claim 1.
3, according to the described mechanical seal device of claim 2, it is characterized in that described cydariform cylindrical shell one end has the annulus of turning up, annulus links to each other by abdominal ring with cylindrical shell.
4,, it is characterized in that stationary seal ring links to each other with elastic cylinder one end according to the described mechanical seal device of claim 1.
5,, it is characterized in that stationary seal ring cooperates the acquisition radial location by fin on the groove that axially is provided with on the side face and the enclosing housing according to the described mechanical seal device of claim 4.
6,, it is characterized in that being provided with between pump chamber and enclosing housing the circulating reflux passage according to claim 1,2,3,4 or 5 described mechanical seal device.
7,, it is characterized in that closed shell axon side or axle both sides are provided with little feed compensation and regulate parts according to the described mechanical seal device of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91213550 CN2091373U (en) | 1991-04-13 | 1991-04-13 | Rotary pump axle machinery seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91213550 CN2091373U (en) | 1991-04-13 | 1991-04-13 | Rotary pump axle machinery seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2091373U true CN2091373U (en) | 1991-12-25 |
Family
ID=4921881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91213550 Withdrawn CN2091373U (en) | 1991-04-13 | 1991-04-13 | Rotary pump axle machinery seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2091373U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832452A (en) * | 2015-05-05 | 2015-08-12 | 四川大禹机械密封件制造有限公司 | Mechanical sealing device |
| CN110030385A (en) * | 2017-11-13 | 2019-07-19 | 通用电气公司 | Seal assembly and its correlation technique |
| CN111954764A (en) * | 2018-04-11 | 2020-11-17 | 洛普兰机械设备有限公司 | Pump housing arrangement for a fluid pump and fluid pump |
-
1991
- 1991-04-13 CN CN 91213550 patent/CN2091373U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832452A (en) * | 2015-05-05 | 2015-08-12 | 四川大禹机械密封件制造有限公司 | Mechanical sealing device |
| CN110030385A (en) * | 2017-11-13 | 2019-07-19 | 通用电气公司 | Seal assembly and its correlation technique |
| US10788130B2 (en) | 2017-11-13 | 2020-09-29 | General Electric Company | Seal assembly |
| CN110030385B (en) * | 2017-11-13 | 2021-07-06 | 通用电气公司 | Seal assembly and related method |
| CN111954764A (en) * | 2018-04-11 | 2020-11-17 | 洛普兰机械设备有限公司 | Pump housing arrangement for a fluid pump and fluid pump |
| US11852146B2 (en) | 2018-04-11 | 2023-12-26 | Velcora Holding Ab | Pump housing device for a fluid pump, and a fluid pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207111971U (en) | A kind of ball valve | |
| CN2091373U (en) | Rotary pump axle machinery seal device | |
| CN2926698Y (en) | Fixed membrane metal sealed spherical valve | |
| CN212338532U (en) | Rotary compensator | |
| CN2384058Y (en) | Side seal type flat gate valve | |
| CN2731201Y (en) | Zero friction sealed valve | |
| CN106593887A (en) | Sealant pump of water pump | |
| CN2199374Y (en) | Self-sealed plunger packing seal for reciprocating pump | |
| CN2198426Y (en) | Liquid closing water pump shaft seal device | |
| CN2345782Y (en) | High-pressure sealing device | |
| CN206468811U (en) | A kind of combination sealing arrangement for filtering equipment | |
| CN201034161Y (en) | Energy-saving type sealer | |
| CN215762189U (en) | Packing is with automatic tight device that expands | |
| CN2434490Y (en) | Self-compensating high temp metal hard sealing ball valve | |
| CN2400603Y (en) | Pump packing structure | |
| CN220081648U (en) | High-pressure low-flow hydraulic diaphragm pump | |
| CN2549273Y (en) | Three eccentric conic sealing butterfly valve | |
| CN220956029U (en) | Two-stage pressure gear pump | |
| CN2455978Y (en) | Top assembled and closed ball valve with adjustable pressure | |
| CN219655414U (en) | High-sealing corrugated pipe stop valve | |
| CN201487374U (en) | Valve sealing ring | |
| CN2139205Y (en) | Adjustable sealed rotary joint | |
| CN2339809Y (en) | Sealing device of oil-delivery pump | |
| CN2580218Y (en) | Piston stop valve | |
| CN211623628U (en) | Single-cylinder double-plunger pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |