CN209705276U - A kind of axial multilayer runner superposition reflux pumping mechanical seal structure - Google Patents
A kind of axial multilayer runner superposition reflux pumping mechanical seal structure Download PDFInfo
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- CN209705276U CN209705276U CN201920273507.2U CN201920273507U CN209705276U CN 209705276 U CN209705276 U CN 209705276U CN 201920273507 U CN201920273507 U CN 201920273507U CN 209705276 U CN209705276 U CN 209705276U
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- pumping
- reflux
- fair current
- mechanical seal
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- 238000005086 pumping Methods 0.000 title claims abstract description 81
- 238000010992 reflux Methods 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 239000011148 porous material Substances 0.000 claims abstract description 13
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 238000010146 3D printing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000007657 chevron notch test Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003486 chemical etching Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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Abstract
A kind of axial multilayer runner superposition reflux pumping mechanical seal structure, rotating ring and stationary ring including mechanical seal, the side of rotating ring is high-pressure side, that is, upstream, the other side of rotating ring is low-pressure side, that is, downstream, rotating ring is by the sealing ring base that successively overlaps, fair current pumps layer, reflux pumping layer and intermediate connection layer composition, it is sealing surface that fair current, which pumps layer end face, reflux pumping layer is close to sealing ring base, intermediate connection layer is located between fair current pumping layer and reflux pumping layer, fair current pumps layer and is equipped with fair current pumping type groove, return port and seals dam, intermediate connection layer is equipped with intercommunicating pore, intercommunicating pore is connected with return port, reflux pumping layer is equipped with reflux pumping type groove and pneumatic trough, the sealing weir that do not slot is equipped between two adjacent pneumatic troughs, pneumatic trough is connected with intercommunicating pore.The utility model hydrodynamic effect is good, fluid film rigidity is big and leakage rate is small, is suitable for high-speed operative conditions.
Description
Technical field
The utility model relates to a kind of mechanical end face sealing structure of rotary type fluid machine sealing, in particular to it is a kind of by
Multi-layer flow channels are superimposed the rotation to reduce the mechanical seal structure of leakage, for rotating machineries such as various high speed compressors and express pumps
Rotating shaft sealing.
Background technique
The dynamic and static pressure bearing capacity for enhancing sealing fluid film by opening up various fluid dynamic and static pressure type grooves in seal face, from
And it realizes the non-contact operation of sealing pair and has become the common technology of gas or hydrodynamic lubrication mechanical seal.With fluting end face machine
Tool is sealed in the application in high-speed rotating machine, needs stringent control in the occasion of some poisonous and harmful, inflammable and explosive media of conveying
Mechanical seal leakage processed, to avoid sealing medium leaks to external environment and causes blast accident.European patent
Chevron-notch that EP0564153A1, United States Patent (USP) US4645414 and Chinese patent CN1215135A, CN1045851A etc. are proposed,
The Eight Character trough seal face structure all by adding reflux pumping type groove on the basis of fair current pumps type groove, utilizes reflux pumping groove
Pumping effect, by the anti-blowback high-pressure side of the fluid for leaking to low-pressure side, thus realize reduce leakage purpose.But
The setting of reflux pumping type groove keeps the development space of fair current pumping groove limited, weakens hydrodynamic effect to a certain extent,
Namely the bearing capacity of end face fluid film and fluid film rigidity is set also to decrease while reducing leakage.
A laminar flow figure all can only be processed in seal face using laser marking, chemical etching or electric plating method in the past
Slot, it is difficult to realize the processing of multilayer complex fluid circulation passage.In recent years, 3D printing technique is risen, and especially micro/nano-scale is super
The development of high-precision 3D printing technique, so that the stacking in multilayer complex fluid channel is processed into possibility.
Summary of the invention
In order to improve the existing mechanical end face seal with reflux pumping type groove bearing capacity existing under high-speed condition
Not big enough the deficiency with fluid film rigidity, the utility model provide that a kind of hydrodynamic effect is good, fluid film rigidity is big and leaks
Measure small axial multilayer superposition runner superposition reflux pumping mechanical seal structure suitable for high-speed operative conditions.
The technical solution of the utility model is:
A kind of axial multilayer runner superposition reflux pumping mechanical seal structure, rotating ring and stationary ring including mechanical seal, institute
The side for stating rotating ring is high-pressure side i.e. upstream, and the other side of the rotating ring is low-pressure side, that is, downstream, and the rotating ring is by successively overlapping
Sealing ring base, fair current pumping layer, reflux pumping layer and intermediate connection layer composition, fair current pumping layer end face is sealing
Face, the reflux pumping layer are close to sealing ring base, and the intermediate connection layer is located between fair current pumping layer and reflux pumping layer,
The fair current pumping layer is equipped with fair current pumping type groove, return port and seals dam, and the intermediate connection layer is equipped with intercommunicating pore, described
Intercommunicating pore is connected with return port, and reflux pumping layer is equipped with reflux pumping type groove and pneumatic trough, two adjacent pneumatic troughs it
Between be equipped with the sealing weir do not slotted, the pneumatic trough is connected with intercommunicating pore.
The seals dam that do not slot in fair current pumping layer is located at downstream side, the fair current pumping type slot position in upstream side,
The return port is located in seals dam.
Fair current pumping layer with a thickness of 1~200 μm, preferred value is 5~30 μm.
It is described reflux pumping layer with a thickness of 0.1~2mm.
The intermediate connection layer with a thickness of 0.5~5mm.
The working principle of the utility model is:
Successively processing reflux pumping layer, intermediate connection layer and fair current in sealing ring base using high-precision 3D printing technique
Pump layer, each layer all need after processing is completed with superfine grinding and surface polishing technique by end face be polished to as defined in roughness want
It asks.At runtime, the fluid media (medium) of upstream side can be pumped into seal face by the fair current pumping Hydrodynamic pressure type slot of fair current pumping layer,
Under the action of radial pressure difference and circumferential high speed shear, the fluid media (medium) being pumped into along fair current pumping groove downstream and windward side
Wall flowing, by downstream seal dam and circumferential seal weir choked flow act on when fluid compressed, pressure rise and form fluid
Dynamic and static pressure bearing capacity.The fluid a part continuation for crossing fair current pumping groove root position is downstream flowed, finally from downstream effluent
Form leakage out；Another part is then flowed by the return port in seals dam along axial, and the intercommunicating pore of intermediate connection layer is passed through
Enter in the reflux pumping groove of reflux pumping layer with the pneumatic trough of reflux pumping layer, and edge under the action of high speed rotation centrifugal force
The anti-blowback upstream side of reflux pumping groove, thus realize reduce leakage purpose.
The utility model has the advantages that:
(1) fluid media (medium) being pumped into from fair current pumping groove in seal clearance, a part can by return port, intercommunicating pore into
Enter reflux pumping layer in pneumatic trough, and by reflux the anti-blowback upstream side of pumping groove, thus reduce fluid media (medium) directly to
The leakage in downstream side improves leakproofness.
(2) it is arranged due to fair current pumping groove and reflux pumping groove along axial stratification, the setting for the pumping groove that flows back will not influence
The abundant development of fair current pumping groove macro contours and groove depth, with previous chevron-notch, the Eight Character trough end face machine with reflux pumping groove
Tool sealing is compared to the bearing capacity and fluid film rigidity that seal face fluid film can be improved, and two seal faces are sent out when reducing high-speed cruising
The raw probability for touching mill, the service life and reliability of prolonged mechanical sealing.
Detailed description of the invention:
Fig. 1 is the three dimensional structure diagram of the utility model case study on implementation one；
Fig. 2 is that the multi-layer flow channels sealing structure of the utility model case study on implementation one axially disassembles schematic diagram；
Fig. 3 is the fair current pumping layer end structure illustration of the utility model case study on implementation one；
Fig. 4 is the three dimensional structure diagram of the utility model case study on implementation two.
Specific embodiment
The implementation of the utility model is described in further detail in conjunction with attached drawing.
Embodiment one
Referring to Fig. 1,2 and 3, a kind of axial multilayer runner superposition reflux pumping mechanical seal structure, including mechanical seal
Rotating ring and stationary ring, the side of the rotating ring are high-pressure side, that is, upstream, and the other side of the rotating ring is low-pressure side, that is, downstream, described dynamic
Ring is made of fair current pumping layer 1, intermediate connection layer 2, reflux pumping layer 3 and the sealing ring base 4 successively overlapped, the fair current pump
Sending 1 end face of layer is sealing surface, and the reflux pumping layer 3 is close to sealing ring base 4, and the intermediate connection layer 2 is located at fair current pumping
Between layer 1 and reflux pumping layer 3, the fair current pumping layer 1 is equipped with fair current and pumps type groove 11, sealing weir 12,13 and of return port
Seals dam 14, the intermediate connection layer 2 are equipped with intercommunicating pore 21, and the intercommunicating pore 21 is connected with return port 13, the reflux pump
It send layer 3 to be equipped with reflux pumping type groove 31 and pneumatic trough 33, is equipped with the sealing weir that do not slot between the two adjacent pneumatic trough 33
32, the pneumatic trough 33 is connected with intercommunicating pore 21.
The seals dam 14 that do not slot in the fair current pumping layer 1 is located at downstream side, and the fair current pumping type groove 11 is located at upper
Side is swum, the return port 13 is located in seals dam 14.
Fair current pumping layer 1 with a thickness of 1~200 μm, preferred value is 5~30 μm.
It is described reflux pumping layer 3 with a thickness of 0.1~2mm.
The intermediate connection layer 2 with a thickness of 0.5~5mm.
Embodiment two
Referring to Fig. 4, the present embodiment and embodiment one the difference is that, the fair current pumping layer 1 is equipped with fair current pump
Type groove 11, sealing weir 12, return port 13, seals dam 14 and annular groove 15 are sent, the annular groove 15 is located at upstream fair current pumping type
Between slot 11 and downstream seal dam 14, the return port 13 is located in annular groove 15, and the depth of the annular groove 15 is less than fair current
Pump the thickness of layer 1.
Content described in this specification embodiment is only an enumeration of the implementation forms of the utility model concept, this is practical new
The protection scope of type should not be construed as being limited to the specific forms stated in the embodiments, the protection scope of the utility model also and
In those skilled in the art according to the thinkable equivalent technology means of the utility model design institute.
Claims (4)
1. a kind of axial multilayer runner superposition reflux pumping mechanical seal structure, rotating ring and stationary ring including mechanical seal are described
The side of rotating ring is high-pressure side, that is, upstream, and the other side of the rotating ring is low-pressure side, that is, downstream, it is characterised in that: the rotating ring by
Sealing ring base, fair current pumping layer, reflux pumping layer and intermediate connection layer composition, the fair current successively overlapped pumps layer end face
It is sealing surface, the reflux pumping layer is close to sealing ring base, and the intermediate connection layer is located at fair current pumping layer and reflux pumps
Between layer, the fair current pumping layer is equipped with fair current pumping type groove, return port and seals dam, the intermediate connection layer and is equipped with connection
Hole, the intercommunicating pore are connected with return port, and the reflux pumping layer is equipped with reflux pumping type groove and pneumatic trough, two Neighbor Sets
The sealing weir that do not slot is equipped between air drain, the pneumatic trough is connected with intercommunicating pore.
2. a kind of axial multilayer runner superposition reflux pumping mechanical seal structure as described in claim 1, it is characterised in that: institute
It states the seals dam that do not slot in fair current pumping layer and is located at downstream side, the fair current pumping type slot position is in upstream side, the return port
In seals dam.
3. a kind of axial multilayer runner superposition reflux pumping mechanical seal structure as described in claim 1, it is characterised in that: institute
State fair current pumping layer with a thickness of 1~200 μm, the reflux pumping layer with a thickness of 0.1~2mm, the intermediate connection layer
With a thickness of 0.5~5mm.
4. a kind of axial multilayer runner superposition reflux pumping mechanical seal structure as claimed in claim 3, it is characterised in that: institute
State fair current pumping layer with a thickness of 5~30 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920273507.2U CN209705276U (en) | 2019-03-05 | 2019-03-05 | A kind of axial multilayer runner superposition reflux pumping mechanical seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920273507.2U CN209705276U (en) | 2019-03-05 | 2019-03-05 | A kind of axial multilayer runner superposition reflux pumping mechanical seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209705276U true CN209705276U (en) | 2019-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920273507.2U Withdrawn - After Issue CN209705276U (en) | 2019-03-05 | 2019-03-05 | A kind of axial multilayer runner superposition reflux pumping mechanical seal structure |
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| Country | Link |
|---|---|
| CN (1) | CN209705276U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826960A (en) * | 2019-03-05 | 2019-05-31 | 浙江工业大学 | A kind of axial multilayer runner superposition reflux pumping mechanical seal structure |
-
2019
- 2019-03-05 CN CN201920273507.2U patent/CN209705276U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826960A (en) * | 2019-03-05 | 2019-05-31 | 浙江工业大学 | A kind of axial multilayer runner superposition reflux pumping mechanical seal structure |
| CN109826960B (en) * | 2019-03-05 | 2024-03-26 | 浙江工业大学 | Axial multilayer flow channel superposition backflow pumping mechanical seal structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191129 Effective date of abandoning: 20240326 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191129 Effective date of abandoning: 20240326 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |