CN104454628B - Seal pressure-relief device for pump in coal chemical industry - Google Patents
Seal pressure-relief device for pump in coal chemical industry Download PDFInfo
- Publication number
- CN104454628B CN104454628B CN201410756214.1A CN201410756214A CN104454628B CN 104454628 B CN104454628 B CN 104454628B CN 201410756214 A CN201410756214 A CN 201410756214A CN 104454628 B CN104454628 B CN 104454628B
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- China
- Prior art keywords
- ring
- seal
- pressure
- pressure relief
- pump
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- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a seal pressure-relief device for pump in coal chemical industry, and belongs to the coal chemical industry field. The seal pressure-relief device for pump in coal chemical industry comprises a throttle pressure-relief ring, a cover, a one-way seal ring and a mechanical seal short sleeve. The cover, the throttle pressure-relief ring and the inner wall of the front end of a pump cover are simultaneously passed through by a bolt, and the throttle pressure-relief ring and the one-way seal ring are axially located. The front section of the throttle pressure-relief ring is a throttle structure and the rear section is a pressure-relief cavity. The one-way seal ring comprises a variant ring and a locating ring, wherein the variant ring is processed by elastic materials, and the locating ring is processed by hard materials. The seal pressure-relief device has the advantages of simple structure, convenient installation and reliable seal and pressure-relieving effect. One-way passage is formed by a pump cavity and mechanical seal cavity. High pressure medium outside is effectively prevented from entering, also reliable seal by rinse water from the seal passage is realized, and thus the service life during delivering solid medium is greatly increased. The seal pressure-relief device for pump in coal chemical industry has important application value.
Description
Technical field
The present invention relates to a kind of Coal Chemical Industry pump and seal pressure relief device, belong to coal chemical technology.
Background technology
In coal chemical technology, some harsh station chemical flow-process pump inlet pressure is high, and pumped (conveying) medium temperature is high,
Medium solid content is high, and the hardness ratio of solid particle is bigger.Safety to pump under such working condition
Have higher requirement, to the sealing structure of pump except have resistance to compression, corrosion-resistant in addition to, to wearability also
Have higher requirement.
What existing chemical flow-process pump was used unloads laminated structure, as it is shown in figure 1, have square inside choke block 103
Shape annular groove, choke block 103 and impeller 101 and machine seal and leave gap, by this structure between short set 105
Throttling can be played and reduce the effect of machine sealing chamber body pressure, thus protecting machine to seal from impacting with high pressure.
Owing to the medium inlet pressure of Coal Chemical Industry transport pump is high, pumped (conveying) medium temperature is high, and medium solid content is high,
And the hardness ratio of solid particle is bigger.Situations below is there will be: 1. mechanical seal rinsing water pressure during pump operation
Instability, is likely less than the pressure of pump chamber；2. the numerous start-stop of pumping frequency or rotary speed unstabilization are fixed, the pressure moment in pump chamber
Vary widely.When the pressure of pump chamber is more than the pressure of mechanical seal cavity, the medium in pump chamber will
Drastically impulse machine seal cavity, high-pressure medium will along axle sleeve with annular rectangular channel with certain speed stream
Enter in mechanical seal cavity, mechanical seal is impacted and washes away abrasion, hold the abrasion mechanical seal of continuing property.
Mechanical seal is by, after shock loading and abrasion, affecting the normal service life of mechanical seal, reduce whole
The stability of individual apparatus system, adds maintenance cost.
Summary of the invention
The invention aims to solve conventional pump sealing and unload the mechanical seal meeting of laminated structure by hard
The shock loading of grain and abrasion, can affect the problems such as the service life of mechanical seal, the stability of reduction pump,
And provide a kind of pump to seal pressure relief device.
It is an object of the invention to be achieved through the following technical solutions:
A kind of Coal Chemical Industry pump of the present invention seals pressure relief device, including throttling pressure relief ring, gland, one-way sealing
Seal ring and the short set of mechanical seal；
Throttling pressure relief ring is loop configuration, and the outer shroud of throttling pressure relief ring is machined with and matches with shape in pump cover front end
Ladder platform, throttling pressure relief ring internal ring leading portion internal diameter is connected with impeller end crest clearance cooperation, and throttle let out
The inwall of pressure ring internal ring leading portion is machined with the rectangle annular groove of interruption, and it is big that throttling pressure relief ring internal ring back segment has internal diameter
The ring decompression chamber of end external diameter is connected in impeller；
The internal ring front end of gland is machined with annular positioning groove；
One-way seal ring includes the locating ring that elastomeric material processes Shape-changeable ring and hard material processes,
The Shape-changeable ring of free state is identical with locating ring structure, is the cone structure restrained forward, cone structure
Outer, rear end extends outward annular connected unit, the annular connected unit of Shape-changeable ring and the annular connected unit of locating ring
Internal-and external diameter identical, the cone structure bore inner diameter of Shape-changeable ring is less than the external diameter of the short set of mechanical seal, locating ring
The crest clearance of cone structure bore inner diameter set short with mechanical seal coordinate；Shape-changeable ring and locating ring are by each
From annular connected unit be adhesively fixed formation taper component；
The front end face of the short set of mechanical seal presses closer the rear end face of impeller, and the short set of mechanical seal coordinates face with impeller
Sealed by sealing ring, and the short set of mechanical seal coordinates the circular orientation that sidewall is end face at place with impeller
Face；Throttling pressure relief ring front end presses closer pump cover front inner wall by ladder platform structure, and gland front end presses closer throttling and lets out
The rear end of pressure ring, in the annular positioning groove of the annular connected unit insertion gland of one-way seal ring, screw is worn simultaneously
Overpressure cap, throttling pressure relief ring and pump cover front inner wall, envoy flows pressure ring and one-way seal ring axially positions；
Now, the throttling internal ring leading portion set short with mechanical seal of pressure relief ring and impeller coordinate the gap, circular orientation face at place
Coordinating, the endoporus of one-way seal ring front end Shape-changeable ring is interference fitted in the sidewall of the short set of mechanical seal, one-way sealing
The sidewall spacers of the endoporus set short with mechanical seal of seal ring rear end locating ring coordinates；The rear end of one-way seal ring sets
Put rinse water arrangement.
The internal ring leading portion set short with mechanical seal of described throttling pressure relief ring and impeller coordinate joining of circular orientation face, place
Conjunction gap is 0.3mm.
The tapering of one-way seal ring cone structure is 15 °～45 °.
One-way seal ring rear end locating ring endoporus is 0.3mm with the fit clearance of mechanical seal short set sidewall.
In one-way seal ring the annular connected unit of Shape-changeable ring and the annular connected unit of locating ring bonding after spacing not
More than 5mm.
The straight-flanked ring groove deep of throttling pressure relief ring internal ring leading portion is 1.5mm, groove width is 2mm.
Work process
When pump runs well, high-pressure washing water is from the endoporus of one-way seal ring rear end locating ring and mechanical seal
Enter in the sidewall spacers of short set, and promote forward the Shape-changeable ring dilatating and deformable of one-way seal ring front end, thus
Make high-pressure washing water through one-way seal ring and the internal ring of throttling pressure relief ring, it is achieved the sealing to external agency；
When generating pump cavity pressure more than flushing water pressure fortuitous event time, back into external high pressure medium first exist
Throttle under the rectangle annular groove effect that throttling pressure relief ring internal ring leading portion is interrupted, enter back into throttling pressure relief ring internal ring back segment
Ring decompression intracavity realize decompression；Now, one-way seal ring forefront pressure is more than rear end pressure, one-way sealing
The Shape-changeable ring of seal ring front end draws in backward, and it is short with mechanical seal to block one-way seal ring rear end locating ring endoporus
Gap between set sidewall, makes external high pressure medium cannot pass through one-way seal ring, prevents it to mechanical seal
Side leaks；After pump recovers to run well, high-pressure washing water promotes the Shape-changeable ring of one-way seal ring front end again
Dilatating and deformable, while realizing sealing, goes out the residual dielectric of throttling pressure relief ring internal ring, it is to avoid remaining
The medium abrasion to mechanical seal.
Beneficial effect:
The sealing pressure relief device simple in construction of the present invention, easy for installation, seal, release reliable for effect, make pump
Chamber forms half-duplex channel with mechanical seal cavity.The sealing pressure relief device of the present invention can effectively stop outside high
The entrance of pressure medium, can guarantee that again flushing water realizes reliably sealing by sealing passage, greatly improves
In the service life of conveying hard medium envelope on opportunity, there is important application value.
Accompanying drawing explanation
Fig. 1 is the structural representation of conventional seals pressure relief device；
Fig. 2 is the structural representation that the present invention seals pressure relief device；
Fig. 3 is that the present invention seals the structural representation of one-way seal ring in pressure relief device；
Fig. 4 is the partial enlarged drawing of Fig. 2；
In figure, 1-impeller；2-pump cover；3-throttles pressure relief ring；4-screw；5-gland；6-one-way seal ring；
The short set of 7-mechanical seal；101-impeller；102-pump cover；103-choke block；104-screw；105-machine seals short set.
Detailed description of the invention
The present invention is described further with embodiment in explanation below in conjunction with the accompanying drawings:
Embodiment
A kind of Coal Chemical Industry pump of the present invention seals pressure relief device, as in figure 2 it is shown, the pressure relief ring 3 that includes throttling,
Gland 5, one-way seal ring 6 and the short set of mechanical seal 7；
Throttling pressure relief ring 3 is loop configuration, and the outer shroud of throttling pressure relief ring 3 is machined with and shape in pump cover 2 front end
The ladder platform matched, the internal ring leading portion internal diameter of throttling pressure relief ring 3 is connected end crest clearance and coordinates with impeller 1,
And the inwall of throttling pressure relief ring 3 internal ring leading portion is machined with the rectangle annular groove of interruption, after throttling pressure relief ring 3 internal ring
Duan Kaiyou internal diameter connects the ring decompression chamber of end external diameter more than impeller 1；
The internal ring front end of gland 5 is machined with annular positioning groove；
As it is shown on figure 3, one-way seal ring 6 includes that elastomeric material processes Shape-changeable ring and hard material processing
Locating ring, the Shape-changeable ring of free state is identical with locating ring structure, be restrain forward the conical surface knot
Structure, the outer, rear end of cone structure extends outward annular connected unit, the annular connected unit of Shape-changeable ring and location
The internal-and external diameter of the annular connected unit of ring is identical, and the cone structure bore inner diameter of Shape-changeable ring is less than the short set of mechanical seal
External diameter, the crest clearance of the cone structure bore inner diameter set short with mechanical seal of locating ring coordinates；Shape-changeable ring
With locating ring by respective annular connected unit be adhesively fixed formation taper component；
The front end face of the short set of mechanical seal 7 presses closer the rear end face of impeller 1, the short set of mechanical seal 7 and impeller 1
Cooperation face sealed by sealing ring, and the short set of mechanical seal 7 coordinates the sidewall at place to be that end face is neat with impeller 1
Flat circular orientation face；Throttling pressure relief ring 3 front end presses closer pump cover 2 front inner wall by ladder platform structure, pressure
Covering 5 front ends and press closer the rear end of throttling pressure relief ring 3, the annular connected unit of one-way seal ring 6 inserts gland 5
In annular positioning groove, screw 4 is also cross gland 5, throttling pressure relief ring 3 and pump cover 2 front inner wall, envoy
Flow pressure ring 3 and one-way seal ring 6 axially positions；Now, the internal ring leading portion of throttling pressure relief ring 3 and machinery
Seal the circular orientation face matched in clearance at short set 7 and impeller 1 cooperation, one-way seal ring 6 front end Shape-changeable ring
Endoporus be interference fitted in the sidewall of the short set of mechanical seal 7, the endoporus of one-way seal ring 6 rear end locating ring with
The sidewall spacers of the short set of mechanical seal 7 coordinates；The rear end of one-way seal ring 6 arranges rinse water arrangement.
As shown in Figure 4, the internal ring leading portion of described throttling pressure relief ring 3 set short with mechanical seal 7 and impeller 1 are joined
At conjunction, the fit clearance in circular orientation face is 0.3mm.
The straight-flanked ring groove deep of throttling pressure relief ring 3 internal ring leading portion is 1.5mm, groove width is 2mm.
The tapering of one-way seal ring 6 cone structure is 27 °.
One-way seal ring 6 rear end locating ring endoporus is 0.3mm with the fit clearance of mechanical seal short set 7 sidewall.
In one-way seal ring 6 the annular connected unit of Shape-changeable ring and the annular connected unit of locating ring bonding after spacing
For 4mm.
Work process
When pump runs well, high-pressure washing water is close with machinery from the endoporus of one-way seal ring 6 rear end locating ring
Enter in sealing the sidewall spacers of short set 7, and promote forward the Shape-changeable ring dilatating and deformable of one-way seal ring 6 front end,
So that high-pressure washing water is through one-way seal ring 6 and the internal ring of throttling pressure relief ring 3, it is achieved to external agency
Sealing；When generating pump cavity pressure more than flushing water pressure fortuitous event time, back into external high pressure be situated between
First matter throttle under the rectangle annular groove effect that throttling pressure relief ring 3 internal ring leading portion is interrupted, and enters back into throttling pressure release
The ring decompression intracavity of ring 3 internal ring back segment realizes decompression；Now, after one-way seal ring 6 forefront pressure is more than
End pressure, the Shape-changeable ring of one-way seal ring 6 front end draws in backward, and blocks location, one-way seal ring 6 rear end
Gap between ring endoporus and mechanical seal short set 7 sidewall, makes external high pressure medium cannot pass through one-way sealing
Ring 6, prevents it from leaking to mechanical seal side；After pump recovers to run well, high-pressure washing water promotes list again
To the Shape-changeable ring dilatating and deformable of sealing ring 6 front end, while realizing sealing, will throttling pressure relief ring 3 internal ring
Residual dielectric go out, it is to avoid the residual dielectric abrasion to mechanical seal.
Claims (6)
1. Coal Chemical Industry pump is with sealing a pressure relief device, it is characterized in that: include throttle pressure relief ring, gland, list
To the short set of sealing ring and mechanical seal；
Throttling pressure relief ring is loop configuration, and the outer shroud of throttling pressure relief ring is machined with and matches with shape in pump cover front end
Ladder platform, throttling pressure relief ring internal ring leading portion internal diameter is connected with impeller end crest clearance cooperation, and throttle let out
The inwall of pressure ring internal ring leading portion is machined with the rectangle annular groove of interruption, and it is big that throttling pressure relief ring internal ring back segment has internal diameter
The ring decompression chamber of end external diameter is connected in impeller；
The internal ring front end of gland is machined with annular positioning groove；
One-way seal ring includes the locating ring that elastomeric material processes Shape-changeable ring and hard material processes,
The Shape-changeable ring of free state is identical with locating ring structure, is the cone structure restrained forward, cone structure
Outer, rear end extends outward annular connected unit, the annular connected unit of Shape-changeable ring and the annular connected unit of locating ring
Internal-and external diameter identical, the cone structure bore inner diameter of Shape-changeable ring is less than the external diameter of the short set of mechanical seal, locating ring
The crest clearance of cone structure bore inner diameter set short with mechanical seal coordinate；Shape-changeable ring and locating ring are by each
From annular connected unit be adhesively fixed formation taper component；
The front end face of the short set of mechanical seal presses closer the rear end face of impeller, and the short set of mechanical seal coordinates face with impeller
Sealed by sealing ring, and the short set of mechanical seal coordinates the circular orientation that sidewall is end face at place with impeller
Face；Throttling pressure relief ring front end presses closer pump cover front inner wall by ladder platform structure, and gland front end presses closer throttling and lets out
The rear end of pressure ring, in the annular positioning groove of the annular connected unit insertion gland of one-way seal ring, screw is worn simultaneously
Overpressure cap, throttling pressure relief ring and pump cover front inner wall, envoy flows pressure ring and one-way seal ring axially positions；
Now, the throttling internal ring leading portion set short with mechanical seal of pressure relief ring and impeller coordinate the gap, circular orientation face at place
Coordinating, the endoporus of one-way seal ring front end Shape-changeable ring is interference fitted in the sidewall of the short set of mechanical seal, one-way sealing
The sidewall spacers of the endoporus set short with mechanical seal of seal ring rear end locating ring coordinates；The rear end of one-way seal ring sets
Put rinse water arrangement.
2. a kind of Coal Chemical Industry pump as claimed in claim 1 is with sealing pressure relief device, it is characterized in that: described joint
Flow the internal ring leading portion set short with mechanical seal of pressure ring and impeller coordinates the fit clearance in circular orientation face, place to be
0.3mm。
3. a kind of Coal Chemical Industry pump as claimed in claim 1 or 2 is with sealing pressure relief device, it is characterized in that: joint
The straight-flanked ring groove deep flowing pressure ring internal ring leading portion is 1.5mm, groove width is 2mm.
4. a kind of Coal Chemical Industry pump as claimed in claim 1 is with sealing pressure relief device, it is characterized in that: described list
It it is 15 °～45 ° to the tapering of sealing ring cone structure.
5. a kind of Coal Chemical Industry pump as described in claim 1 or 2 or 4 seals pressure relief device, it is characterized in that:
Described one-way seal ring rear end locating ring endoporus is 0.3mm with the fit clearance of mechanical seal short set sidewall.
6. a kind of Coal Chemical Industry pump as described in claim 1 or 2 or 4 seals pressure relief device, it is characterized in that:
In described one-way seal ring the annular connected unit of Shape-changeable ring and the annular connected unit of locating ring bonding after spacing not
More than 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410756214.1A CN104454628B (en) | 2014-12-10 | 2014-12-10 | Seal pressure-relief device for pump in coal chemical industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410756214.1A CN104454628B (en) | 2014-12-10 | 2014-12-10 | Seal pressure-relief device for pump in coal chemical industry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104454628A CN104454628A (en) | 2015-03-25 |
| CN104454628B true CN104454628B (en) | 2017-01-11 |
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ID=52901211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410756214.1A Expired - Fee Related CN104454628B (en) | 2014-12-10 | 2014-12-10 | Seal pressure-relief device for pump in coal chemical industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104454628B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782124A (en) * | 2016-03-16 | 2016-07-20 | 武汉工程大学 | Spiral groove heat dissipation and pressure reduction device for high-temperature centrifugal pump |
| CN110094353A (en) * | 2018-01-28 | 2019-08-06 | 吴军 | A kind of coal chemical industry pump sealing pressure relief device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3536140A1 (en) * | 1985-10-10 | 1987-04-16 | Klein Schanzlin & Becker Ag | CENTRIFUGAL PUMP UNIT |
| AU2003902582A0 (en) * | 2003-05-23 | 2003-06-12 | Weir Warman Ltd | Pressure relief arrangement for a pump |
| CN1318762C (en) * | 2006-03-31 | 2007-05-30 | 浙江水泵总厂有限公司 | High temperature high pressure hot-water circulating pump |
| CN1844678A (en) * | 2006-04-05 | 2006-10-11 | 丛铭 | Single-stage horizontal automatic-balancing centrifugal seal pump device |
| CN202251058U (en) * | 2011-09-08 | 2012-05-30 | 东营海森密封技术有限责任公司 | Oil film double mechanical sealing device for compressors |
| CN204327571U (en) * | 2014-12-10 | 2015-05-13 | 襄阳五二五泵业有限公司 | A kind of Coal Chemical Industry pump sealing pressure relief device |
-
2014
- 2014-12-10 CN CN201410756214.1A patent/CN104454628B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104454628A (en) | 2015-03-25 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20181210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |