CN109751238A - A kind of smelt gear pump and its sealing structure - Google Patents
A kind of smelt gear pump and its sealing structure Download PDFInfo
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- CN109751238A CN109751238A CN201910130908.7A CN201910130908A CN109751238A CN 109751238 A CN109751238 A CN 109751238A CN 201910130908 A CN201910130908 A CN 201910130908A CN 109751238 A CN109751238 A CN 109751238A
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- 238000007789 sealing Methods 0.000 title claims abstract description 89
- 241001062472 Stokellia anisodon Species 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 65
- 239000002826 coolant Substances 0.000 claims abstract description 20
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 20
- 206010008469 Chest discomfort Diseases 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The present invention relates to a kind of smelt gear pump and its sealing structures.The seal cartridge assembly of smelt gear pump sealing structure of the invention is equipped with coolant seal section, dynamic seal section and hydrostatic seal section, coolant seal section realizes first order sealing by the first helixseal structure, cooling chamber can reduce the temperature at sealing station simultaneously, improve material viscosity, reduce its mobility, improve sealing effect, dynamic seal section covers upper second helixseal structure by the second dynamic seal and realizes the sealing of the second pole, reach more reliable sealing, outermost hydrostatic seal realizes the sealing between outside air and dynamic seal, simultaneously, when Melt Pump is shut down, stop seal is realized by hydrostatic seal, the sealing structure structure is simple, sealed reliable, it can be suitable for high-temperature high-pressure work environment, meet vacuum sealing requirement.
Description
Technical field
The present invention relates to a kind of smelt gear pump and its sealing structures.
Background technique
Smelt gear pump is usually used in the working environment of high temperature and pressure, the process and conveying process suitable for polymerization reaction.
Bottom discharging, Pipeline transport and the pressurization etc. of such as resin, chemical fibre industry high temperature, high-viscosity polymer.The sealing of gear pump
It plays an important role for whole equipment operating, the sealing system leakage of gear pump will seriously affect the normal of equipment
Operating, even results in safety accident.
The mode that the sealing of gear pump generallys use at present is the filled sealing of spiral, mechanical seal and magnet fluid sealing
Deng.Spiral filled be sealed in can not seal vacuum when working under higher vacuum environment, will lead to ambient atmosphere and be released into and be
System.On the one hand may lead gear pump can not discharge, cisco unity malfunction, on the other hand may result in material denaturation.It is mechanical
The operating temperature of sealing depends on the material of the sealing ring of composition mechanical seal, and when operating temperature is excessively high, sealing ring can be damaged
And it fails.According to the sealing ring of superhigh temperature resistant degree, cost is prohibitively expensive, remote super mechanical seal price itself.Magnet fluid sealing
No leakage, without abrasion, pollution-free, but cost is excessively high, is not suitable for the working environment of high temperature equally.
One kind is needed in polymer reaction process can be suitable for high-temperature high-pressure work environment, meet vacuum sealing and want
It asks, is low in cost, sealing device reliable for operation.
Summary of the invention
The present invention provides a kind of smelt gear pump sealing structure, to solve asking for existing sealing gear pump poor structural reliability
Topic；Meanwhile the present invention also provides a kind of gear pumps using above-mentioned smelt gear pump sealing structure.
Smelt gear pump sealing structure of the invention adopts the following technical scheme that
Smelt gear pump sealing structure, including casing and be arranged in the casing and power intake reaches the machine
Gear shaft outside shell, the casing is equipped with the seal cartridge assembly being sleeved on the power output end of the gear shaft, described
Seal cartridge assembly includes close to the cooling seal section that the casing is arranged and the power being arranged on the outside of the cooling seal section
Seal section and the hydrostatic seal section being arranged on the outside of the dynamic seal section, the cooling seal section is equipped with to be turned with the gear shaft
First helixseal structure of dynamic sealing cooperation, and the position of the first helixseal structure is corresponded on the cooling seal section
Place is equipped with the cooling chamber for passing through for cooling medium, and the dynamic seal section is equipped with dynamic seal set, the dynamic seal
Set is cooperated with the gear shaft by the second helixseal structure rotary seal, and the hydrostatic seal section includes two and is oppositely arranged
And the sealing ring with gear shaft rotary seal cooperation, the interval between two sealing rings is formed to be situated between for being passed through high pressure sealing
The high pressure chest of matter.
The seal cartridge assembly includes the body being sleeved on the gear shaft, and the body is close to one end of the casing
Equipped with cooling annular groove, the outer sheath of the cooling annular groove is equipped with the cooling annular groove enclosed shape into the closing of the cooling chamber
Set, the closing are put on equipped with cooling medium inlet and cooling medium outlet, and the first helixseal structure setting is in body
On inner wall at the corresponding cooling annular groove.
The body is equipped with the axially extending dynamic seal installation along the gear shaft in the outside of the cooling annular groove
Slot, the dynamic seal are set in the dynamic seal mounting groove, are equipped on the outside of the body power is close
Press set of the big envelope press limit in the dynamic seal mounting groove.
The press is arranged with inserting into the dynamic seal mounting groove and presses cooperation with the dynamic seal circle
Cartridge part.
The cartridge part is land structure.
Smelt gear pump of the invention adopts the following technical scheme that
Smelt gear pump including casing and is arranged in the casing and power intake reaches the tooth outside the casing
Wheel shaft, the casing are equipped with the seal cartridge assembly being sleeved on the power output end of the gear shaft, the seal cartridge assembly
Including close to the casing setting cooling seal section and be arranged in it is described cooling seal section on the outside of dynamic seal section with set
The hydrostatic seal section on the outside of the dynamic seal section is set, the cooling seal section is equipped with to be cooperated with the gear shaft rotary seal
The first helixseal structure, and correspond on the cooling seal section at the position of the first helixseal structure equipped with being used for
For the cooling chamber that cooling medium passes through, the dynamic seal section is equipped with dynamic seal set, the dynamic seal set and the tooth
Wheel shaft by the second helixseal structure rotary seal cooperate, the hydrostatic seal section include two be oppositely arranged and with the tooth
The sealing ring of wheel shaft rotary seal cooperation, the interval between two sealing rings form the high pressure for being passed through high pressure sealing medium
Chamber.
The seal cartridge assembly includes the body being sleeved on the gear shaft, and the body is close to one end of the casing
Equipped with cooling annular groove, the outer sheath of the cooling annular groove is equipped with the cooling annular groove enclosed shape into the closing of the cooling chamber
Set, the closing are put on equipped with cooling medium inlet and cooling medium outlet, and the first helixseal structure setting is in body
On inner wall at the corresponding cooling annular groove.
The body is equipped with the axially extending dynamic seal installation along the gear shaft in the outside of the cooling annular groove
Slot, the dynamic seal are set in the dynamic seal mounting groove, are equipped on the outside of the body power is close
Press set of the big envelope press limit in the dynamic seal mounting groove.
The press is arranged with inserting into the dynamic seal mounting groove and presses cooperation with the dynamic seal circle
Cartridge part.
The cartridge part is land structure.
The beneficial effects of the present invention are: the seal cartridge assembly of smelt gear pump sealing structure of the invention is close equipped with cooling
Section, dynamic seal section and hydrostatic seal section are sealed, coolant seal section realizes first order sealing by the first helixseal structure, simultaneously
Cooling chamber can reduce the temperature at sealing station, improve material viscosity, reduce its mobility, improve sealing effect, and power is close
It seals section and upper second helixseal structure realization the second pole sealing is covered by the second dynamic seal, reach more reliable sealing,
Outermost hydrostatic seal realizes the sealing between outside air and dynamic seal, meanwhile, when Melt Pump is shut down, by static pressure
Stop seal is realized in sealing, which can be suitable for high-temperature high-pressure work environment, meet
Vacuum sealing requirement.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the embodiment of smelt gear pump of the invention；
Fig. 2 is the partial enlarged view at the hydrostatic seal position in Fig. 1；
Fig. 3 is the cooperation schematic diagram of body and closing set；
Fig. 4 is the perspective view of Fig. 1；
In figure: 1, casing；2, gear shaft；3, body；4, closing set；5, press set；6, dynamic seal circle；31, cooling annular groove；
32, connecting flange；33, the first helixseal structure；34, dynamic seal circle mounting groove；41, cooling medium inlet；42, cooling to be situated between
Matter outlet；51, cartridge part；52, liquid sealing inlet；53, sealing liquid exports；54, sealing ring；55, spacer ring；61, annular groove.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of smelt gear pump of the invention, as shown in Figures 1 to 4, smelt gear pump include casing 1 and setting
In casing 1 and power intake reaches the gear shaft 2 outside casing 1, and casing 1 is equipped with the power for being sleeved on gear shaft 2
Seal cartridge assembly on output end, seal cartridge assembly include that the cooling seal section being arranged close to casing 1 and setting are close in cooling
Dynamic seal section on the outside of envelope section and the hydrostatic seal section being arranged on the outside of dynamic seal section, cooling seal section is equipped with and gear shaft
First helixseal structure 33 of 2 rotary seals cooperation, and the position of the first helixseal structure 33 is corresponded on the seal section that cools down
Place is equipped with the cooling chamber for passing through for cooling medium, and dynamic seal section is equipped with dynamic seal set, dynamic seal set and gear
Axis 2 is cooperated by the second helixseal structure rotary seal, and hydrostatic seal section includes two and is oppositely arranged and rotates with gear shaft 2
The sealing ring 54 of cooperation is sealed, the interval between two sealing rings 54 forms the high pressure chest for being passed through high pressure sealing medium.?
In actual use, it needs to be connected to corresponding coolant system in cooling chamber, it can be close to the first spiral by cooling chamber
Efficiently cooled down at seal structure 33, improve the viscosity of material at this, reduce mobility, guarantees sealing effect, meanwhile, it is cooling
Device also provides cooling for entire sealing shroud.
Seal cartridge assembly includes the body 3 being sleeved on gear shaft 2, and body 3 is equipped with cooling annular groove close to one end of casing 1
31, the outer sheath of cooling annular groove 31, which is equipped with, will cool down the closing set 4 that the closing of annular groove 31 forms cooling chamber, and closing set 4 is equipped with cold
But medium entrance 41 and cooling medium outlet 42, the first helixseal structure 33 are arranged at the corresponding cooling annular groove 31 of body 3
On inner wall.Specifically, body 3 and closing set 4 are machined out respectively, are then assembled and are welded to connect, one side structure
Intensity is high, on the other hand can also ensure that between the two there is enough sealing performances by welding, passes through body 3 and closing set 4
Combination form cooling chamber, structure is simple, easy to process.
Body 3 is equipped with the axially extending dynamic seal circle mounting groove 34 along gear shaft 2 in the outside of cooling annular groove 31, moves
Power sealing is set in dynamic seal circle mounting groove 34, and the outside of body 3, which is equipped with, covers press limit dynamic for dynamic seal
Power seals the press set 5 in mounting groove.Dynamic seal circle 6 is pressed by press set 5 and is fixed, structure is simple.Meanwhile it pressing
It can be used to that hydrostatic seal structure is arranged on set 5, keep entire sealing structure simple.Specifically, dynamic seal circle 6 can choose not
Same material, such as polytetrafluoroethylene (PTFE) or nylon.To improve sealing performance, the second helixseal knot on dynamic seal circle 6
The use helix parameter different from the first helixseal structure 33 of structure, meanwhile, the second helixseal knot on dynamic seal circle 6
Gap between structure and gear shaft 2 is less than the gap between the first helixseal structure 33 and gear shaft 2.Dynamic seal circle 6
It is to protect gear shaft 2 using the main purpose of different materials, smaller fit clearance is provided.
The back segment of press set 5 is equipped with the mounting groove for installing hydrostatic seal coil structures, and two sealing rings are arranged in the peace
It is positioned in tankage and by spacer ring separation, meanwhile, it is additionally provided with liquid sealing inlet 52 and sealing liquid outlet 53 on press set, is used for and phase
The sealing capability connection answered.
Specifically, the inserting that press set 5 is equipped with inserting into dynamic seal mounting groove and with the press cooperation of dynamic seal circle 6
Portion 51, cartridge part 51 are land structure.So steadily pressure on top surface can be provided for dynamic seal circle 6.To be easily installed, covering
The connecting flange 32 outwardly protruded is arranged in the rear end of body 3, increases connection area, improves the side of structural strength and connection structure setting
Just property.Multiple annular grooves 61 are equipped at intervals with, also on the periphery of dynamic seal circle for reducing the frictional force in installation process.
The seal cartridge assembly of smelt gear pump sealing structure of the invention is equipped with coolant seal section, dynamic seal section and quiet
Means of press seals section, coolant seal section realizes first order sealing by the first helixseal structure, while cooling chamber can reduce sealing
Temperature at position improves material viscosity, reduces its mobility, improves sealing effect, and dynamic seal section is close by the second power
The second helixseal structure on big envelope realizes the sealing of the second pole, reaches more reliable sealing, and outermost hydrostatic seal is real
Sealing between existing outside air and dynamic seal, meanwhile, when Melt Pump is shut down, stop seal is realized by hydrostatic seal,
The sealing structure simple structure and reliable sealing can be suitable for high-temperature high-pressure work environment, meet vacuum sealing requirement.It is this
Scheme is in addition to that can prevent inner melt from leaking compared with the prior art for new structural smelt gear pump vacuum sealing device, also
There is good envelope vacuum action, can effectively prevent outside air and enter system.It can guarantee in higher work simultaneously
Make normal use under temperature and biggish operating pressure, structure is simple, low in cost suitable for different media.Pass through change
The material of dynamic seal circle, helix parameter in the present apparatus, sealing structure etc. can meet different applying working conditions, while design
In view of the interchangeability with packing seal, using flexible, repacking is convenient.
In other embodiments of the invention, closing set and body can also be passed through again later by casting integrated molding
Cooperation is realized in processing；Dynamic seal circle can also be fixed by circlip；Cartridge part can also be interval platform structure；Dynamic seal circle is also
Soft metal structure, such as aluminium or copper can be used.
Smelt gear pump sealing structure of the invention, the smelt gear pump sealing structure and above-mentioned smelt gear pump
Embodiment in sealing structure structure it is identical, repeat no more.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. smelt gear pump sealing structure, including casing and be arranged in the casing and power intake reach it is described
Gear shaft outside casing, it is characterised in that: the casing is close on the power output end of the gear shaft equipped with being sleeved on
Cover assembly, the seal cartridge assembly include sealing close to the cooling seal section of casing setting and setting in the cooling
The dynamic seal section in section outside and the hydrostatic seal section that is arranged on the outside of the dynamic seal section, the cooling seal section equipped with
First helixseal structure of the gear shaft rotary seal cooperation, and it is close to correspond to first spiral on the cooling seal section
The cooling chamber for passing through for cooling medium is equipped at the position of seal structure, the dynamic seal section is equipped with dynamic seal set,
The dynamic seal set is cooperated with the gear shaft by the second helixseal structure rotary seal, and the hydrostatic seal section includes
Two are oppositely arranged and the sealing rings with gear shaft rotary seal cooperation, the interval between two sealing rings are formed for leading to
Enter the high pressure chest of high pressure sealing medium.
2. smelt gear pump sealing structure according to claim 1, it is characterised in that: the seal cartridge assembly includes set
Body on the gear shaft, the body are equipped with cooling annular groove close to one end of the casing, the cooling annular groove
Outer sheath is equipped with the cooling annular groove enclosed shape into the closing set of the cooling chamber, the closing put on equipped with cooling medium into
Mouth and cooling medium outlet, the first helixseal structure setting is on the inner wall that body corresponds at the cooling annular groove.
3. smelt gear pump sealing structure according to claim 2, it is characterised in that: the body is in the cooling ring
The outside of slot is equipped with the axially extending dynamic seal mounting groove along the gear shaft, and the dynamic seal is set on described dynamic
Power seals in mounting groove, is equipped on the outside of the body dynamic seal covering press limit in dynamic seal installation
Press set in slot.
4. smelt gear pump sealing structure according to claim 3, it is characterised in that: the press is arranged with inserting and arrives
Cartridge part in the dynamic seal mounting groove and with dynamic seal circle press cooperation.
5. smelt gear pump sealing structure according to claim 4, it is characterised in that: the cartridge part is land knot
Structure.
6. smelt gear pump, including casing and it is arranged in the casing and power intake reaches outside the casing
Gear shaft, it is characterised in that: the casing is equipped with the seal cartridge assembly being sleeved on the power output end of the gear shaft, institute
Stating seal cartridge assembly includes close to the cooling seal section that the casing is arranged and being arranged in dynamic on the outside of the cooling seal section
Power seal section and the hydrostatic seal section being arranged on the outside of the dynamic seal section, the cooling seal section are equipped with and the gear shaft
First helixseal structure of rotary seal cooperation, and the position of the first helixseal structure is corresponded on the cooling seal section
The place of setting is equipped with the cooling chamber for passing through for cooling medium, and the dynamic seal section is equipped with dynamic seal set, and the power is close
Big envelope and the gear shaft are cooperated by the second helixseal structure rotary seal, and the hydrostatic seal section includes two and sets relatively
It sets and the sealing ring with gear shaft rotary seal cooperation, the interval between two sealing rings is formed for being passed through high pressure sealing
The high pressure chest of medium.
7. smelt gear pump according to claim 6, it is characterised in that: the seal cartridge assembly includes being sleeved on the tooth
Body on wheel shaft, the body are equipped with cooling annular groove close to one end of the casing, and the outer sheath of the cooling annular groove is equipped with
By the cooling annular groove enclosed shape at the closing set of the cooling chamber, the closing is put on equipped with cooling medium inlet and cooling Jie
Matter outlet, the first helixseal structure setting is on the inner wall that body corresponds at the cooling annular groove.
8. smelt gear pump according to claim 7, it is characterised in that: the body is set on the outside of the cooling annular groove
There is the axially extending dynamic seal mounting groove along the gear shaft, the dynamic seal is set on the dynamic seal installation
In slot, it is equipped on the outside of the body and the dynamic seal is covered into press of the press limit in the dynamic seal mounting groove
Set.
9. smelt gear pump according to claim 8, it is characterised in that: it is close to the power that the press is arranged with inserting
Seal the cartridge part in mounting groove and with dynamic seal circle press cooperation.
10. smelt gear pump according to claim 9, it is characterised in that: the cartridge part is land structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130908.7A CN109751238B (en) | 2019-02-22 | 2019-02-22 | Melt gear pump and sealing structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130908.7A CN109751238B (en) | 2019-02-22 | 2019-02-22 | Melt gear pump and sealing structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109751238A true CN109751238A (en) | 2019-05-14 |
| CN109751238B CN109751238B (en) | 2024-03-08 |
Family
ID=66407444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910130908.7A Active CN109751238B (en) | 2019-02-22 | 2019-02-22 | Melt gear pump and sealing structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109751238B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931839A (en) * | 2021-09-15 | 2022-01-14 | 荣盛石化股份有限公司 | Combined sealing structure of kettle bottom melt discharging gear pump |
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| CN113931839A (en) * | 2021-09-15 | 2022-01-14 | 荣盛石化股份有限公司 | Combined sealing structure of kettle bottom melt discharging gear pump |
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