CN205350360U - Liquid film seal end face slot type structure that can two -way rotation - Google Patents
Liquid film seal end face slot type structure that can two -way rotation Download PDFInfo
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- CN205350360U CN205350360U CN201620052369.1U CN201620052369U CN205350360U CN 205350360 U CN205350360 U CN 205350360U CN 201620052369 U CN201620052369 U CN 201620052369U CN 205350360 U CN205350360 U CN 205350360U
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- groove
- dynamic pressure
- face
- liquid film
- air supply
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Abstract
The utility model relates to a liquid film seal end face slot type structure that can two -way rotation belongs to mechanical seal technical field. Characterized by quiet ring and rotating ring under the exogenic action formation seal face of laminating is each other selected rotating ring or quiet ring wherein arbitrary terminal surface be carved with the flute profile, every bank of cells is become by two radial air feed grooves and a pair of mirror symmetry's dynamic pressure bank of cells, radial air feed cell type be the rectangle, separate by not grooved between two cell types in dynamic pressure groove be type chevron shape groove, the dynamic pressure groove is just to the air feed groove, wherein a class chevron shape trench is the upper reaches in the high -pressure side, it is low reaches that the rectangular channel is located the low tension side. The bank of cells distributes along the seal face circumferencial direction. The utility model discloses it is good to have the leakproofness, and bearing capacity is strong, can two -way rotary seal, and application range is wide etc..
Description
Technical field
This utility model relates to the liquid film seal structure of a kind of rotary type fluid machine, particularly to a kind of can the dynamic pressure type seal face grooved of bidirectional rotation, belong to fluid movable sealing field.
Background technology
Under External Force Acting, rotating ring and stationary ring are bonded to each other, a seal face is selected to be carved with groove group, the geometry of dynamic pressure groove is the core content of described invention, dynamic pressure effect due to dynamic pressure groove, continuous, stable fluid film is formed between both ends of the surface, this thin film has certain rigidity and bearing capacity, finally makes seal face be in stable contactless state for a long time, reaches purpose hermetically.Good dynamic pressure groove can guarantee that rotating shaft rotating forward, counter-rotating time be attained by above-mentioned functions.But there is the problem that the letters such as fluid film rigidity fluid film thickness relatively low, that formed between dynamic and static ring is relatively small, dynamic pressure effect is relatively weak, opening force is relatively low, use scope is little are to be solved in the grooved on current double rotational directions seal ring seal end face.The grooved of the fluid dynamic pressure groove arranged on change seal face, is strengthen end face hydrodynamic effect, reduces sealing leak amount and extends the effective and conventional means in sealing service life.
Utility model content
Given this, this utility model provide a kind of can the new structure form of contactless hydrodynamic mechanical seal groove of double rotational directions, by the innovation to seal face upper fluid dynamic pressure groove structure, when rotating shaft forward or counter-rotating, all can forming continuous, stable sealing liquid film between dynamic and static ring seal face, noncontact when have effectively achieved bidirectional rotation runs.
Can the liquid film seal structure of bidirectional rotation, including two sealing ring (i.e. rotating rings, stationary ring), it is characterized in that: described rotating ring or stationary ring any of which end face are carved with groove group, each groove group (2) is made up of the dynamic pressure groove (4) of two radial directions air supply trough (5) and a pair specular, radially supply grooved is rectangular channel (or dovetail groove), dynamic pressure groove is class man type chute (or splayed groove), separated by the platform (3) do not slotted between two grooveds, dynamic pressure groove is just to air supply trough, wherein class man type chute is positioned at high-pressure side and upstream, rectangular channel is positioned at low-pressure side and downstream.
Described can bidirectional rotary turn trough group (2) circumferentially distributed on seal face, the number that end face (1) arranges groove group is 4～7 groups.
Having isolation platform (3) between described high-pressure side dynamic pressure groove and low-pressure side air supply trough, its distance range is 4～7mm.
In described class chevron-notch (4), the center of circle of elongated slot root and short the formed circular arc of groove root is same center of circle O with the center of circle of described seal face (1) excircle and inner periphery.Corresponding center of circle O, the short groove root of class chevron-notch and radius respectively R1, R2 of elongated slot root；The inner periphery of seal face (1) and radius respectively Rg1, Rg2 of excircle.Further, Rg1 < R1≤R2 < Rg2.
The positive offside of described dynamic pressure groove is provided with radially air supply trough, and air supply trough is isolated with dynamic pressure groove.Dynamic pressure groove (4) degree of depth is 5～12um；The degree of depth of air supply trough (5) is 1～10um.
In described groove group (2), a pair air supply trough (5) angle relative to center of circle O isIt ranges for 18 °～24 °.
The degree of depth of described dynamic pressure groove (4) is etc. not deep, deepens gradually to endoporus direction groove depth along radius from cylindrical.
Described can in bidirectional rotary turn trough group, the continuous line style of grooved of dynamic pressure groove (4) can be spiral line type, circular arc line style；Air supply trough (5) line style continuously is linear type.
In described groove group, dynamic pressure groove flute profile width (6) is 3～8mm；Air supply trough width (7) is 3～8mm.
The good effect that this utility model has:
Can the hydrodynamic lubrication non-contact mechanical seal structure of bidirectional rotation.Ensure that the dynamic pressure effect of rotating shaft forward or counter-rotating time slot group all can form effective liquid film bearing capacity, ensure liquid-film lubrication.Thus reducing fretting wear, improve the serviceability of sealing member.And trench structure is simply prone to optimize design, is particularly well-suited to would be likely to occur on the rotating machinery of reversion, has the scope of application flexibly.
Accompanying drawing explanation
Fig. 1 is bidirectional rotation liquid film seal end view of the present utility model；
Fig. 2 is bidirectional rotary turn trough group air supply trough of the present utility model is the seal face schematic diagram of dovetail groove；
Fig. 3 is the seal face schematic diagram that bidirectional rotary turn trough group dynamic pressure groove left and right groove root of the present utility model is identical；
Fig. 4 is that bidirectional rotary turn trough group dynamic pressure groove left and right groove root of the present utility model is identical, and air supply trough is the seal face schematic diagram of dovetail groove；
Wherein, 1-sealing ring, 2-bidirectional rotary turn trough group, 4-dynamic pressure groove, 5-air supply trough.
Detailed description of the invention
Below in conjunction with the detailed description of the invention of accompanying drawing illustrated embodiment, foregoing of the present utility model is described in further detail again.
Embodiment one
As shown in Figure 1, a kind of can the liquid film seal structure of bidirectional rotation, including two sealing rings (rotating ring, stationary ring), in described rotating ring and stationary ring the end face of at least one sealing ring be provided with multiple along end face circle distribution can the groove group (2) of bidirectional rotation.Each groove group is made up of the dynamic pressure groove (4) of two radial directions air supply trough (5) and a pair specular, radially supply grooved is rectangular channel, dynamic pressure groove is class man type chute, separated by the platform (3) do not slotted between two grooveds, dynamic pressure groove is just to air supply trough, wherein class man type chute is positioned at high-pressure side and upstream, and rectangular channel is positioned at low-pressure side and downstream.
Described can bidirectional rotary turn trough group (2) circumferentially distributed on seal face, the number that end face (1) arranges groove group is 4～7 groups.
Having isolation platform (3) between described high-pressure side dynamic pressure groove and low-pressure side air supply trough, its distance range is 4～7mm.
In described class chevron-notch (4), the center of circle of elongated slot root and short the formed circular arc of groove root is same center of circle O with the center of circle of described seal face (1) excircle and inner periphery.Corresponding center of circle O, the short groove root of class chevron-notch and radius respectively R1, R2 of elongated slot root；The inner periphery of seal face (1) and radius respectively Rg1, Rg2 of excircle.Further, Rg1 < R1≤R2 < Rg2.
The positive offside of described dynamic pressure groove is provided with radially air supply trough, and air supply trough is isolated with dynamic pressure groove.Dynamic pressure groove (4) degree of depth is 5～12um；The degree of depth of air supply trough (5) is 1～10um.
In described groove group (2) a pair air supply trough (5) angle relative to center of circle O be θ 1 its range for 18 °～24 °.
The degree of depth of described dynamic pressure groove (4) is etc. not deep, deepens gradually to endoporus direction groove depth along radius from cylindrical.
Described can in bidirectional rotary turn trough group, the continuous line style of grooved of dynamic pressure groove (4) can be spiral line type, circular arc line style；Air supply trough (5) line style continuously is linear type.
In described groove group, dynamic pressure groove flute profile width (6) is 3～8mm；Air supply trough width (7) is 3～8mm.
Embodiment two
As in figure 2 it is shown, the present embodiment and embodiment one are different in that in described groove group, radially air supply trough is a pair dovetail groove.Dovetail groove longitudinal edge is 5 °～10 ° relative to the angle theta 0 of rectangular channel longitudinal edge, and all the other structures are identical with embodiment one with embodiment.
Embodiment three
As it is shown on figure 3, the present embodiment and embodiment one are different in that in described groove group, the left and right groove root of dynamic pressure grooved becomes axial symmetry identical.All the other structures are identical with embodiment one with embodiment.
Embodiment four
As shown in Figure 4, in groove group described in the present embodiment, radially air supply trough is identical with embodiment two, is a pair dovetail groove；Dynamic pressure groove is identical with embodiment three, becomes axially symmetric structure.All the other embodiments are identical with embodiment one.
Content described in this specification embodiment is only enumerating of the way of realization to utility model design; protection domain of the present utility model is not construed as being only limitted to the concrete form that embodiment is stated; without departing from the idea case in the present invention described above; the various replacements made according to ordinary skill knowledge and customary means or change, all should be included within the scope of the invention.
Claims (9)
1. one kind can the liquid film seal end face trench structure of bidirectional rotation, including two sealing rings, i.e. rotating ring, stationary ring, it is characterized in that: described rotating ring or stationary ring any of which end face are carved with groove group, each groove group (2) is made up of the dynamic pressure groove (4) of two radial directions air supply trough (5) and a pair specular, radially supply grooved can be rectangular channel or dovetail groove, dynamic pressure groove can be class man type chute or splayed groove, separated by the platform (3) do not slotted between two grooveds, dynamic pressure groove is just to air supply trough, wherein class man type chute is positioned at high-pressure side and upstream, rectangular channel is positioned at low-pressure side and downstream.
2. according to claim 1 a kind of can the liquid film seal end face trench structure of bidirectional rotation, it is characterized in that: described can bidirectional rotary turn trough group (2) circumferentially distributed on seal face, the number that described end face (1) arranges groove group is 4～7 groups.
3. according to claim 1 a kind of can the liquid film seal end face trench structure of bidirectional rotation, it is characterised in that: having isolation platform (3) between described high-pressure side dynamic pressure groove and low-pressure side air supply trough, its distance range is 4～7mm.
4. according to claim 1 a kind of can the liquid film seal end face trench structure of bidirectional rotation, it is characterised in that: in described class chevron-notch (4), the center of circle of elongated slot root and short the formed circular arc of groove root is same center of circle O with the center of circle of described seal face (1) excircle and inner periphery；Corresponding described center of circle O, the short groove root of described class chevron-notch and radius respectively R1, R2 of elongated slot root；The inner periphery of described seal face (1) and radius respectively Rg1, Rg2 of excircle, and, Rg1 < R1≤R2 < Rg2.
5. according to claim 1 a kind of can the liquid film seal end face trench structure of bidirectional rotation, it is characterised in that: the positive offside of described dynamic pressure groove is provided with radially air supply trough, and air supply trough is isolated with dynamic pressure groove, and described dynamic pressure groove (4) degree of depth is 5～12um；The degree of depth of described air supply trough (5) is 1～10um.
6. according to claim 1 a kind of can the liquid film seal end face trench structure of bidirectional rotation, it is characterised in that: in described groove group (2) a pair air supply trough (5) angle relative to center of circle O be θ 1 its range for 18 °～24 °.
7. according to claim 1 a kind of can the liquid film seal end face trench structure of bidirectional rotation, it is characterised in that: the degree of depth of described dynamic pressure groove (4) is etc. not deep, deepens gradually to endoporus direction groove depth along radius from cylindrical.
8. according to claim 1 a kind of can the liquid film seal end face trench structure of bidirectional rotation, it is characterised in that: described can in bidirectional rotary turn trough group, the continuous line style of grooved of described dynamic pressure groove (4) can be spiral line type, circular arc line style；Described air supply trough (5) line style continuously is linear type.
9. according to claim 1 a kind of can the liquid film seal end face trench structure of bidirectional rotation, it is characterised in that: in described groove group, dynamic pressure groove flute profile width (6) is 3～8mm；Air supply trough width (7) is 3～8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620052369.1U CN205350360U (en) | 2016-01-20 | 2016-01-20 | Liquid film seal end face slot type structure that can two -way rotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620052369.1U CN205350360U (en) | 2016-01-20 | 2016-01-20 | Liquid film seal end face slot type structure that can two -way rotation |
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| CN205350360U true CN205350360U (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620052369.1U Expired - Fee Related CN205350360U (en) | 2016-01-20 | 2016-01-20 | Liquid film seal end face slot type structure that can two -way rotation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089794A (en) * | 2016-07-07 | 2016-11-09 | 合肥通用环境控制技术有限责任公司 | A kind of ultra-low temperature pump axle head mechanically-sealing apparatus |
| CN106089692A (en) * | 2016-07-01 | 2016-11-09 | 魏宇坤 | A kind of cryogenic liquid pump self-lubricating contact device and method |
| CN107401614A (en) * | 2017-07-28 | 2017-11-28 | 丹东克隆集团有限责任公司 | Nuclear power safety injection pump mechanical seal end surface |
| CN110691931A (en) * | 2017-05-19 | 2020-01-14 | 伊格尔工业股份有限公司 | Sliding component |
-
2016
- 2016-01-20 CN CN201620052369.1U patent/CN205350360U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089692A (en) * | 2016-07-01 | 2016-11-09 | 魏宇坤 | A kind of cryogenic liquid pump self-lubricating contact device and method |
| CN106089794A (en) * | 2016-07-07 | 2016-11-09 | 合肥通用环境控制技术有限责任公司 | A kind of ultra-low temperature pump axle head mechanically-sealing apparatus |
| CN110691931A (en) * | 2017-05-19 | 2020-01-14 | 伊格尔工业股份有限公司 | Sliding component |
| CN110691931B (en) * | 2017-05-19 | 2022-02-01 | 伊格尔工业股份有限公司 | Sliding component |
| CN107401614A (en) * | 2017-07-28 | 2017-11-28 | 丹东克隆集团有限责任公司 | Nuclear power safety injection pump mechanical seal end surface |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20170120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |