CN108426035A - A kind of enhanced non-contact mechanical seal structure of liquid - Google Patents
A kind of enhanced non-contact mechanical seal structure of liquid Download PDFInfo
- Publication number
- CN108426035A CN108426035A CN201810482453.0A CN201810482453A CN108426035A CN 108426035 A CN108426035 A CN 108426035A CN 201810482453 A CN201810482453 A CN 201810482453A CN 108426035 A CN108426035 A CN 108426035A
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- Prior art keywords
- ring
- axle sleeve
- low pressure
- rotary packing
- stationary
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- 239000007788 liquid Substances 0.000 title claims abstract description 87
- 238000012856 packing Methods 0.000 claims abstract description 81
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 238000004140 cleaning Methods 0.000 claims abstract description 40
- 210000004907 gland Anatomy 0.000 claims abstract description 37
- 206010008469 Chest discomfort Diseases 0.000 claims abstract description 14
- 230000008676 import Effects 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims 1
- 238000005461 lubrication Methods 0.000 abstract description 5
- 238000007373 indentation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 14
- 239000012530 fluid Substances 0.000 description 11
- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical compound [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009863 secondary prevention Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/324—Arrangements for lubrication or cooling of the sealing itself
Abstract
The present invention relates to a kind of enhanced non-contact mechanical seal structures of liquid, it is related to mechanical seal field, including being socketed and fixing axle sleeve on the rotary shaft, the cavity being arranged outside axle sleeve and the gland being socketed on axle sleeve, cavity is between axle sleeve and gland, the sliding of axle sleeve axial direction is provided with rotary packing ring on axle sleeve, the stationary seal ring with rotary packing ring sealing cooperation is provided on gland, the first elastic component is provided on axle sleeve, rotary packing ring is towards on the end face of stationary seal ring or stationary seal ring is towards offering annular groove on the end face of rotary packing ring, cavity includes low pressure chamber and high pressure chest, the outlet of import and the outflow for being passed through cleaning low pressure liquid to low pressure chamber is offered on gland, secondary seal structure is provided on axle sleeve.Cleaning low pressure liquid indentation annular groove is made rotary packing ring be separated with stationary seal ring by rotary shaft rotation, realizes the full liquid-film lubrication of seal face and contact is run, reduce the generation of heat, to considerably increase the service life of sealing.
Description
Technical field
The present invention relates to mechanical seal field more particularly to a kind of enhanced non-contact mechanical seal structures of liquid.
Background technology
Mechanical seal is a kind of gland seal device of fluid rotary machine, also known as end face seal.Traditional contact type mechanical is close
Envelope is so that it is fully bonded, to prevent sealing medium from being leaked between seal face under the action of compensation mechanism elastic force.Its
The friction pair of dynamic/stationary ring composition is typically in boundary friction or mixed film friction state, in high parameter operating mode (high temperature, high pressure, high speed
Deng) under the conditions of, friction factor is larger, and power consumption is high, serious wear, short life, and operation and maintenance cost is higher.As aviation is navigated
It, the rapid development of the industry such as nuclear power, natural gas transportation and petrochemical industry, to mechanical seal, more stringent requirements are proposed, to
The progress of sealing technique is pushed.
But existing mechanical seal is using medium fluid as lubricating end surface, leakage part is from high pressure side leakage to low
Press side.It needs clean sealing medium and the suitable type of cooling to ensure the long-life of sealing.However, this be sealed in
Reply high viscosity, containing operating modes such as a large amount of silts when just encounter problem, a large amount of granule foreigns enter seal face, cause end face
It is seriously worn, and high viscosity fluid can not form effective lubrication and heat dissipation in end face, cause sealing life wretched insufficiency.
Invention content
The purpose of the present invention is to provide a kind of enhanced non-contact mechanical seal structures of liquid, have so that sealed end
The advantages of service life in face increases.
The present invention above-mentioned purpose technical scheme is that：
A kind of enhanced non-contact mechanical seal structure of liquid, including be socketed and fix axle sleeve on the rotary shaft, setting exists
The cavity and be socketed on axle sleeve opposing stationary with cavity holding that axle sleeve is used to produce relative rotation with axle sleeve when rotated outside
Gland, the cavity between axle sleeve and gland, on the axle sleeve along axle sleeve axial direction sliding be provided with dynamic sealing
Ring is provided with the stationary seal ring with rotary packing ring sealing cooperation on the gland, is provided with so that rotary packing ring on the axle sleeve
Always there is the first elastic component to stationary seal ring side movement tendency, the rotary packing ring is towards the end face of stationary seal ring or quiet close
For seal ring towards annular groove is offered on the end face of rotary packing ring, the cavity includes the outside diameter and pressure of rotary packing ring and stationary seal ring
The internal side diameter and axle sleeve of the low pressure chamber and rotary packing ring and stationary seal ring for accommodating cleaning low pressure liquid formed between lid
Between formed for accommodating the high pressure chest of highly pressurised liquid, offered on the gland for being passed through cleaning low pressure liquid to low pressure chamber
The import of body and outlet for being flowed out for liquid in low pressure chamber, on the axle sleeve far from stationary seal ring end axle sleeve and gland it
Between be provided with highly pressurised liquid prevented to flow to secondary seal structure outside gland.
Implement above-mentioned technical proposal, rotary shaft is passed through cleaning low pressure liquid after rotation, toward entrance, cleans low pressure liquid
It is entered in low pressure chamber by import at this time.Rotary packing ring high speed rotation sucks cleaning low pressure liquid in annular groove and keeps cleaning low
Press liquid is moved from the outside diameter of rotary packing ring to internal diameter side, due to the incompressible characteristic of liquid, cleans low pressure liquid at this time
Certain pressure is generated between rotary packing ring and stationary seal ring so that stationary seal ring toward close to the first elastic component side move,
At this moment first elastic component is compressed, rotary packing ring is detached from stationary seal ring.Enter height after being pressurized by annular groove using low-pressure fluid
Chamber is pressed, ensure that rotary packing ring and stationary seal ring always work in clean fluid, avoid the particle in medium in high pressure chest
Impurity or high viscosity medium influence sealing operation.The full liquid film profit of seal face is realized since rotary packing ring and stationary seal ring separate
Sliding and non-contact operation reduces operation power consumption and reduces the generation of heat, to considerably increase the service life of sealing.
Further, first elastic component includes the spring base and be arranged in spring base that setting is located in the cavity on gland
On the first spring, first spring one end connect with spring base, the connection of the other end and rotary packing ring.
Implement above-mentioned technical proposal, when rotary shaft does not rotate, is fixed on effect of the first spring on spring base in elasticity
Lower to strut naturally, driving rotary packing ring is close to stationary seal ring side, allows rotary packing ring to be pushed against with stationary seal ring and realizes mechanical seal
Structure；And after rotary shaft rotation, cleaning low pressure liquid pours in annular groove, and the first spring is poured in band by cleaning low pressure liquid at this time
The pressure come realizes the separation of rotary packing ring and stationary seal ring to compress.Rotary shaft drives rotary packing ring rotation can at this time
Realize non-contacting seal, rotary packing ring will not generate friction with the end face of stationary seal ring, therefore it is dynamic close just can to reach increase
The effect of the service life of seal ring.
Further, it is provided between the rotary packing ring and the first spring for preventing the first spring and rotary packing ring direct
The support ring of contact.
Implement above-mentioned technical proposal, the setting of support ring makes the supporting surface between the first spring and rotary packing ring become larger,
It can more stablize when the first spring being allowed to push rotary packing ring movement, and can also prevent the two from generating to a certain extent and mutually turn
It is dynamic, to achieve the effect that anti-rotation.
Further, the secondary seal structure includes the rotating ring being arranged on axle sleeve and setting is used on gland and rotating ring
Tight against stationary ring, the had for making rotating ring always to stationary ring side movement tendency is provided between the spring base and rotating ring
Two elastic components.
Implement above-mentioned technical proposal, due to the setting of the second elastic component so that stationary ring is pushed against with the rotating ring on axle sleeve always
And mechanical seal state is formed, it at this moment cleans outside being not easy to flow between stationary ring and rotating ring after low pressure liquid flows into low pressure chamber
Boundary achievees the effect that allow cleaning low pressure liquid can be normally in low pressure chamber internal circulation flow；And if rotary packing ring and stationary seal ring
Between sealing effect failure after, sealing between rotating ring and stationary ring can secondary prevention highly pressurised liquid external pressure is flowed out by cavity
Lid.
Further, second elastic component includes that the second spring far from the first spring side is arranged on spring base, described
Second spring one end is connect with spring base, the other end and rotating ring connect.
Implement above-mentioned technical proposal, due to the elasticity of second spring itself, after second spring is connect with rotating ring, the second bullet
Rotating ring can be pushed against on stationary ring by spring, allowed and realized mechanical seal structure between rotating ring and stationary ring, to achieve the effect that sealing.
Further, it is provided between axle sleeve and rotary packing ring on the axle sleeve and highly pressurised liquid is prevented to flow into the first spring
The first interior sealing ring.
Implement above-mentioned technical proposal, the setting of the first sealing ring is so that the cleaning low pressure liquid of place in the cavity is not easy from chamber
Gap, internal gland between body and internal gland and the gap between outer press cover flow to the external world, do not only reach the effect of sealing, and
Also to a certain extent so that work condition environment is good.
Further, pump efficiency ring is provided on the wall surface being located in low pressure chamber on the spring base.
Implement above-mentioned technical proposal, it, can be by axle sleeve side when rotary shaft is rotated with certain rotating speed after pump efficiency ring is installed
Cleaning low pressure liquid is pumped into the other side of pump efficiency ring.And pump efficiency ring is mounted in low pressure chamber, therefore can be being located in low pressure chamber
The cleaning low pressure liquid of pump efficiency ring side is pumped into the other side of pump efficiency ring, to realize cleaning low pressure liquid from import to outlet
Rapid Circulation, allow cleaning low pressure liquid it is clean better.
Further, be provided on the gland support stationary seal ring static seal ring seat, the static seal ring seat with it is quiet close
It is provided between seal ring and highly pressurised liquid is prevented to enter the second sealing ring in low pressure chamber.
Implement above-mentioned technical proposal, the setting of static seal ring seat can play the role of fixed stationary seal ring, and after being arranged
There can be certain gap between static seal ring seat and stationary seal ring, therefore in order to prevent highly pressurised liquid from entering low pressure chamber out of gap
In, the second sealing ring is arranged between static seal ring seat and stationary seal ring effectively highly pressurised liquid to be prevented to enter low pressure chamber
In, achieve the effect that sealing.
Further, the rotating ring is respectively positioned on stationary ring in low pressure chamber, close to stationary ring side and positioned at low pressure chamber on the rotating ring
In wall surface on open up it is fluted.
Implement above-mentioned technical proposal, when cleaning low pressure liquid circulates in low pressure chamber, due to being provided on rotating ring
Groove, cleaning low pressure liquid can be quickly entered in groove when circulating and then be flowed out again, can allow in this way rotating ring and stationary ring it
Between the heat that generates be more easy to be pulled away, achieve the effect that allow rub between the rotating ring and stationary ring heat of generation to be removed in time,
Add somewhat to the service life of rotating ring and stationary ring.
Further, the annular groove is opened in the outside diameter of rotary packing ring and is connected to or is arranged in stationary seal ring with low pressure chamber
It outside diameter and is connected to low pressure chamber, when annular groove is set on the end face of rotary packing ring, the annular groove is in the end face of rotary packing ring
Upper and identical by the trend of radial outside to radially inner side and the direction of rotation of rotary packing ring, the annular groove is set to stationary seal ring
End face on it is opposite by the trend of radial outside to radially inner side and the direction of rotation of rotary packing ring.
Implement above-mentioned technical proposal, when annular groove is set on the end face of rotary packing ring, rotary shaft rotation, annular groove follows one
Rotation is played, the low pressure cleaning fluid entered in slot is compressed to high pressure and is flowed to high pressure chest, to make end face separate.Its principle
It is to utilize the viscosity of liquid big and its incompressible characteristic.Rotation direction phase of the direction with rotary packing ring is opened up due to annular groove
Together so that low pressure cleans the pressure bigger in liquid indentation annular groove, reaches and allows rotary packing ring and the stationary seal ring to be more easy to be squeezed
Effect, so that sealing is better；Similarly, when annular groove is set on the end face of stationary seal ring, principle and above-mentioned original
Reason is consistent, does not repeat excessively herein.
In conclusion the invention has the advantages that：Enter high pressure chest after being pressurized by annular groove using low-pressure fluid,
Ensure that rotary packing ring and stationary seal ring always work in clean fluid, avoid granule foreign in high pressure chest in medium or
High viscosity medium influences sealing operation.The full liquid-film lubrication of seal face and non-is realized since rotary packing ring is separated with stationary seal ring
Contact operation reduces operation power consumption and reduces the generation of heat, to considerably increase the service life of sealing.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the diagrammatic cross-section of annular groove of the embodiment of the present invention.
Reference numeral：1, rotary shaft；2, axle sleeve；21, rotary packing ring；211, annular groove；22, the first sealing ring；3, cavity；
31, low pressure chamber；32, high pressure chest；4, gland；41, stationary seal ring；411, static seal ring seat；412, the second sealing ring；42, import；
43, it exports；5, the first elastic component；51, spring base；511, pump efficiency ring；52, the first spring；53, support ring；6, secondary seal knot
Structure；61, rotating ring；611, groove；62, stationary ring；63, second spring.
Specific implementation mode
In the following detailed description, it is proposed that many details, in order to complete understanding of the present invention.But
It will be apparent to those skilled in the art that the present invention can be in some details in not needing these details
In the case of implement.Below the description of embodiment is used for the purpose of providing to the present invention more by showing the example of the present invention
Understand well.
Below in conjunction with attached drawing, the technical solution of the embodiment of the present invention is described.
Embodiment one：
As shown in Figure 1, 2, the enhanced non-contact mechanical seal structure of a kind of liquid, including be socketed and be fixed in rotary shaft 1
Axle sleeve 2, the cavity 3 being arranged outside axle sleeve 2 and the gland 4 being socketed on axle sleeve 2, cavity 3 when rotated with axle sleeve 2 generate
It relatively rotates, gland 4 keeps opposing stationary with cavity 3, and cavity 3 is between axle sleeve 2 and gland 4；Along axle sleeve on axle sleeve 2
The sliding of 2 axial directions is provided with rotary packing ring 21, and the stationary seal ring 41 with the sealing cooperation of rotary packing ring 21 is provided on gland 4,
It is provided on axle sleeve 2 so that rotary packing ring 21 has the first elastic component 5 to 41 side movement tendency of stationary seal ring, dynamic sealing always
Ring 21 is towards offering annular groove 211 on the end face of stationary seal ring 41；In the present embodiment, annular groove 211 is opened in rotary packing ring 21
Outside diameter and be connected to low pressure chamber 31, annular groove 211 is on the end face of rotary packing ring 21 and by radial outside to radially inner side
Trend is identical as the direction of rotation of rotary packing ring 21；Cavity 3 includes the low pressure chamber 31 and use for accommodating cleaning low pressure liquid
The space formed between the high pressure chest 32 for accommodating highly pressurised liquid, the outside diameter and gland 4 of rotary packing ring 21 and stationary seal ring 41
As low pressure chamber 31, the space formed between the internal side diameter and axle sleeve 2 of rotary packing ring 21 and stationary seal ring 41 is high pressure chest 32;
In the present embodiment, the pressure of the cleaning low pressure liquid in low pressure chamber 31 is the pressure relative to the highly pressurised liquid in high pressure chest 32
Relatively low, the cleaning low pressure liquid in low pressure chamber 31 can be normal pressure so that the cleaning low pressure liquid in low pressure chamber 31 is not easy to reveal.
Import 42 and outlet 43 are offered on gland 4, import 42 is used to be passed through cleaning low pressure liquid to low pressure chamber 31, and opening is for for low
Press the cleaning low pressure liquid outflow in chamber 31.
Rotary shaft 1 after rotation, is passed through cleaning low pressure liquid at past import 42, cleaning low pressure liquid passes through import 42 at this time
It enters in low pressure chamber 31.21 high speed rotation of rotary packing ring sucks cleaning low pressure liquid in annular groove 211 and makes cleaning low pressure liquid
Body is moved from the outside diameter of rotary packing ring 21 to internal diameter side, due to the incompressible characteristic of liquid, is cleaned low pressure liquid at this time and is existed
Certain pressure is generated between rotary packing ring 21 and stationary seal ring 41 so that stationary seal ring 41 is toward close to 5 side of the first elastic component
Mobile, at this moment the first elastic component 5 is compressed, and rotary packing ring 21 is detached from stationary seal ring 41.Pass through annular groove 211 using low-pressure fluid
Enter high pressure chest 32 after supercharging, ensure that rotary packing ring 21 and stationary seal ring 41 always work in clean fluid, avoid height
Granule foreign or high viscosity medium in chamber 32 in medium is pressed to influence sealing operation.Due to rotary packing ring 21 and stationary seal ring 41 every
Opening realizes the full liquid-film lubrication of seal face and non-contact operation, reduces operation power consumption and reduces the generation of heat, to
Considerably increase the service life of sealing.
As shown in Figure 1, the first elastic component 5 includes the spring base 51 being arranged in cavity 3 on gland 4 and is arranged in bullet
The first spring 52 on spring abutment 51,52 one end of the first spring is connect with spring base 51, the other end and rotary packing ring 21 connect.It is dynamic close
Support ring 53 is provided between seal ring 21 and the first spring 52, the setting of support ring 53 makes the first spring 52 and rotary packing ring 21
Between supporting surface become larger, can more stablize when allowing the first spring 52 that rotary packing ring 21 is pushed to move, and also can be in certain journey
Prevent the two from generating mutually rotation on degree, to achieve the effect that anti-rotation.
When rotary shaft 1 does not rotate, the first spring 52 being fixed on spring base 51 struts naturally under the action of elasticity, drives
Dynamic rotary packing ring 21 is close to 41 side of stationary seal ring, allows rotary packing ring 21 to be pushed against with stationary seal ring 41 and realizes mechanical seal structure；
And after rotary shaft 1 rotates, cleaning low pressure liquid pours in annular groove 211, and the first spring 52 is poured in by cleaning low pressure liquid at this time
The pressure brought realizes the separation of rotary packing ring 21 and stationary seal ring 41 to compress.
As shown in Figure 1, being provided with secondary seal structure between axle sleeve 2 and gland 4 far from 41 end of stationary seal ring on axle sleeve 2
6, the outside that secondary seal structure 6 is used to that highly pressurised liquid to be prevented to flow to gland 4.Secondary seal structure 6 includes being arranged on axle sleeve 2
Rotating ring 61 and be arranged on gland 4 for rotating ring 61 tight against stationary ring 62, the is provided between spring base 51 and rotating ring 61
Two elastic components, the second elastic component make rotating ring 61 have the trend moved to 62 side of stationary ring always；Second elastic component is that setting exists
Second spring 63 far from 52 side of the first spring on spring base 51,63 one end of second spring connect with spring base 51, the other end and
Rotating ring 61 connects.
Due to the setting of second spring 63 so that stationary ring 62 is pushed against with the rotating ring 61 on axle sleeve 2 and formed mechanical close always
At this moment envelope state cleans after low pressure liquid flows into low pressure chamber 31 and is not easy to flow to the external world between stationary ring 62 and rotating ring 61, reaches
Allow cleaning low pressure liquid can be normally in the effect of 31 internal circulation flow of low pressure chamber；And if rotary packing ring 21 and stationary seal ring 41 it
Between sealing effect failure after, the sealing between rotating ring 61 and stationary ring 62 can prevent highly pressurised liquid to be flowed out by cavity 3 again
Outer press cover 4.
As shown in Figure 1, rotating ring 61 is respectively positioned on stationary ring 62 in low pressure chamber 31, close to 62 side of stationary ring and positioned at low on rotating ring 61
Fluted 611 are opened up on wall surface in pressure chamber 31.When cleaning low pressure liquid circulates in low pressure chamber 31, due to rotating ring 61
Upper setting fluted 611, cleaning low pressure liquid can be quickly entered in groove 611 when circulating and then be flowed out again, meeting in this way
It allows the heat generated between rotating ring 61 and stationary ring 62 to be more easy to be pulled away, increases making for rotating ring 61 and stationary ring 62 to a certain extent
Use the service life.
As shown in Figure 1, being provided with pump efficiency ring 511 on the wall surface being located in low pressure chamber 31 on spring base 51, pump efficiency ring is installed
After 511, when rotary shaft 1 is rotated with certain rotating speed, the cleaning low pressure liquid of 2 side of axle sleeve can be pumped into pump efficiency ring 511
The other side.And pump efficiency ring 511 is mounted in low pressure chamber 31, therefore can be the cleaning for being located at 511 side of pump efficiency ring in low pressure chamber 31
Low pressure liquid is pumped into the other side of pump efficiency ring 511, to realize cleaning low pressure liquid quickly following from import 42 to outlet 43
Ring, can be more rapid when making cleaning low pressure liquid clean better and taking away heat.
As shown in Figure 1, the first sealing ring 22 is provided on axle sleeve 2 between axle sleeve 2 and rotary packing ring 21, the first sealing
Circle 22 can effectively prevent highly pressurised liquid flow into the first spring 52 in, allow the first spring 52 will not by the pollution of highly pressurised liquid and
Promote its service life.Be provided on gland 4 support stationary seal ring 41 static seal ring seat 411, static seal ring seat 411 with it is quiet close
The second sealing ring 412 is provided between seal ring 41, the second sealing ring 412 can effectively prevent highly pressurised liquid from entering low pressure chamber 31
It is interior, make the effect of sealing more preferable.
Embodiment two：
The present embodiment and the main distinction of embodiment one are：As shown in Figure 1, 2, annular groove 211 is arranged in the outer of stationary seal ring 41
It diameter side and is connected to low pressure chamber 6, annular groove 211 is set on the end face of stationary seal ring 41 by the trend of radial outside to radially inner side
It is opposite with the direction of rotation of rotary packing ring 21.
Specific work process：
After starting the drive rotation of axle sleeve 2 of rotary shaft 1, it is passed through cleaning low pressure liquid at import 42, cleans low pressure liquid at this time and exists
31 internal circulation flow of low pressure chamber simultaneously enters in annular groove 211, and rotary packing ring 21 is separated with stationary seal ring 41 and enters high pressure chest 32
It is interior, it ensure that rotary packing ring 21 and stationary seal ring 41 always work in clean fluid, avoid of medium in high pressure chest 32
Grain impurity or high viscosity medium influence sealing operation, and rotary shaft 1 drives rotary packing ring 21 rotating at this time, due to rotary packing ring 21
Being separated with stationary seal ring 41 realizes the full liquid-film lubrication of seal face and non-contact operation, reduces operation power consumption and reduces heat
The generation of amount, to considerably increase the service life of sealing.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than limits the protection domain of invention.It is aobvious
So, described embodiment is only section Example of the present invention, rather than whole embodiments.Based on these embodiments, ability
The every other embodiment that domain those of ordinary skill is obtained without creative efforts belongs to institute of the present invention
Scope of protection.
Although with reference to above-described embodiment, invention is explained in detail, and those of ordinary skill in the art still can be with
In the absence of conflict, creative work is not made to be according to circumstances combined with each other the feature in various embodiments of the present invention, increase
Other adjustment are deleted or make, to obtain different, essence without departing from the other technologies scheme of the design of the present invention, these technical sides
Case similarly belongs to invention which is intended to be protected.
Claims (10)
1. a kind of enhanced non-contact mechanical seal structure of liquid, it is characterised in that：Including being socketed and being fixed on rotary shaft (1)
On axle sleeve (2), setting be used for the cavity (3) that produces relative rotation when rotated with axle sleeve (2) and socket outside in axle sleeve (2)
Keep opposing stationary gland (4) with cavity (3) on axle sleeve (2), the cavity (3) be located at axle sleeve (2) and gland (4) it
Between, the sliding of axle sleeve (2) axial direction is provided with rotary packing ring (21) on the axle sleeve (2), is provided on the gland (4)
With the stationary seal ring (41) of rotary packing ring (21) sealing cooperation, be provided on the axle sleeve (2) so that rotary packing ring (21) always
With the first elastic component (5) to stationary seal ring (41) side movement tendency, the rotary packing ring (21) is towards stationary seal ring (41)
End face or stationary seal ring (41) towards annular groove (211), the cavity (3) is offered on the end face of rotary packing ring (21) include dynamic
The low pressure for accommodating cleaning low pressure liquid formed between sealing ring (21) and the outside diameter and gland (4) of stationary seal ring (41)
What is formed between chamber (31) and the internal side diameter and axle sleeve (2) of rotary packing ring (21) and stationary seal ring (41) is used to accommodate high pressure liquid
The high pressure chest (32) of body offers the import (42) for being passed through cleaning low pressure liquid to low pressure chamber (31) on the gland (4)
With the outlet (43) for being flowed out for liquid in low pressure chamber (31), held in axle sleeve far from stationary seal ring (41) on the axle sleeve (2)
(2) it is provided between gland (4) and highly pressurised liquid is prevented to flow to the secondary seal structure (6) of gland (4) outside.
2. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 1, it is characterised in that：Described
One elastic component (5) includes spring base (51) and setting of the setting in cavity (3) on gland (4) on spring base (51)
First spring (52), described first spring (52) one end is connect with spring base (51), the other end and rotary packing ring (21) connect.
3. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 2, it is characterised in that：It is described dynamic
It is provided between sealing ring (21) and the first spring (52) for preventing the first spring (52) from being in direct contact with rotary packing ring (21)
Support ring (53).
4. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 2, it is characterised in that：Described two
Secondary sealing structure (6) include be arranged rotating ring (61) on axle sleeve (2) and setting on gland (4) for rotating ring (61) tight against
Stationary ring (62), be provided between the spring base (51) and rotating ring (61) for so that rotating ring (61) has to stationary ring always
(62) the second elastic component of side movement tendency.
5. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 4, it is characterised in that：Described
Two elastic components include that the second spring (63) far from the first spring (52) side, the second spring is arranged on spring base (51)
(63) one end is connect with spring base (51), the other end and rotating ring (61) connect.
6. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 2, it is characterised in that：The axis
The be provided with positioned at axle sleeve (2) and rotary packing ring (21) between on set (2) in prevention highly pressurised liquid inflow the first spring (52)
One sealing ring (22).
7. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 2, it is characterised in that：The bullet
It is provided with pump efficiency ring (511) on the wall surface being located in low pressure chamber (31) on spring abutment (51).
8. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 1, it is characterised in that：The pressure
The static seal ring seat (411) of support stationary seal ring (41), the static seal ring seat (411) and stationary seal ring are provided on lid (4)
(41) it is provided between and highly pressurised liquid is prevented to enter the second sealing ring (412) in low pressure chamber (31).
9. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 4, it is characterised in that：It is described dynamic
Ring (61) is respectively positioned on stationary ring (62) in low pressure chamber (31), close to stationary ring (62) side and positioned at low pressure chamber on the rotating ring (61)
(31) it is opened up on the wall surface in fluted (611).
10. the enhanced non-contact mechanical seal structure of a kind of liquid according to claim 1, it is characterised in that：It is described
Annular groove (211) is opened in the outside diameter of rotary packing ring (21) and is connected to or is arranged in the outer of stationary seal ring (41) with low pressure chamber (31)
It diameter side and is connected to low pressure chamber (6), when annular groove (211) is set on the end face of rotary packing ring (21), the annular groove (211) exists
It is on the end face of rotary packing ring (21) and identical as the direction of rotation of rotary packing ring (21) by the trend of radial outside to radially inner side,
When annular groove (211) is set on the end face of stationary seal ring (41), the annular groove (211) is set to the end face of stationary seal ring (41)
On it is opposite with the direction of rotation of rotary packing ring (21) by the trend of radial outside to radially inner side.
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| CN201810482453.0A CN108426035A (en) | 2018-05-18 | 2018-05-18 | A kind of enhanced non-contact mechanical seal structure of liquid |
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| CN201810482453.0A CN108426035A (en) | 2018-05-18 | 2018-05-18 | A kind of enhanced non-contact mechanical seal structure of liquid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109654228A (en) * | 2018-12-07 | 2019-04-19 | 宁波方力密封件有限公司 | A kind of dry friction mechanical seal assembly |
| CN110513323A (en) * | 2019-09-17 | 2019-11-29 | 四川日机密封件股份有限公司 | A kind of contactless isolating seal structure for turbine pump |
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| CN203770645U (en) * | 2014-01-06 | 2014-08-13 | 东莞市华汇精密机械有限公司 | Two-end-surface mechanical seal device |
| CN203892237U (en) * | 2014-01-06 | 2014-10-22 | 东莞市华汇精密机械有限公司 | Mechanical sealing device used for hydrodynamic turbine |
| CN208204012U (en) * | 2018-05-18 | 2018-12-07 | 四川日机密封件股份有限公司 | A kind of enhanced non-contact mechanical seal structure of liquid |
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| US4290611A (en) * | 1980-03-31 | 1981-09-22 | Crane Packing Co. | High pressure upstream pumping seal combination |
| CN102900846A (en) * | 2012-11-01 | 2013-01-30 | 安徽亚兰密封件有限公司 | Novel sealing device combining Archimedes spiral groove sealing and contact type mechanical sealing |
| CN203770645U (en) * | 2014-01-06 | 2014-08-13 | 东莞市华汇精密机械有限公司 | Two-end-surface mechanical seal device |
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| CN109654228A (en) * | 2018-12-07 | 2019-04-19 | 宁波方力密封件有限公司 | A kind of dry friction mechanical seal assembly |
| CN109654228B (en) * | 2018-12-07 | 2023-09-08 | 宁波方力密封件有限公司 | Dry grinding mechanical seal assembly |
| CN110513323A (en) * | 2019-09-17 | 2019-11-29 | 四川日机密封件股份有限公司 | A kind of contactless isolating seal structure for turbine pump |
| CN110513323B (en) * | 2019-09-17 | 2024-02-20 | 中密控股股份有限公司 | Non-contact isolation sealing structure for turbine pump |
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Address after: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. eight Applicant after: Zhongmi Holding Co., Ltd Address before: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. eight Applicant before: Sichuan Sunny Seal Co., Ltd. |