CN208204017U - The enhanced non-contact mechanical seal structure of liquid - Google Patents

The enhanced non-contact mechanical seal structure of liquid Download PDF

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Publication number
CN208204017U
CN208204017U CN201820759767.6U CN201820759767U CN208204017U CN 208204017 U CN208204017 U CN 208204017U CN 201820759767 U CN201820759767 U CN 201820759767U CN 208204017 U CN208204017 U CN 208204017U
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China
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ring
low pressure
stationary
axle sleeve
liquid
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Active
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CN201820759767.6U
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Chinese (zh)
Inventor
刘小明
王泽平
张车宁
段媛竹
陈果
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Zhongmi Holding Co., Ltd
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SICHUAN SUNNY SEAL CO Ltd
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Priority to CN201820759767.6U priority Critical patent/CN208204017U/en
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  • Sealing Devices (AREA)

Abstract

The utility model 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, rotary packing ring on axle sleeve is set, the internal gland being fixed on pump housing, the stationary seal ring being slidably arranged on internal gland and the first elastic component being arranged between stationary seal ring and internal gland, 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, the high pressure chest for accommodating highly pressurised liquid is formed between rotary packing ring and the outside diameter and cavity of stationary seal ring, the low pressure chamber for accommodating low pressure liquid is formed between internal side diameter and axle sleeve, outer press cover is arranged with outside axle sleeve, import and outlet are offered on outer press cover.Cleaning low pressure liquid indentation annular groove separates rotary packing ring with stationary seal ring by rotary shaft rotation, realizes the full liquid-film lubrication of seal face and contact operation, reduces the generation of heat, to considerably increase the service life of sealing.

Description

The enhanced non-contact mechanical seal structure of liquid
Technical field
The utility model relates to mechanical seal field, in particular to a kind of enhanced non-contact mechanical seal knot of liquid Structure.
Background technique
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 to be bonded it sufficiently under the action of compensation mechanism elastic force, to prevent sealing medium from leaking between seal face.Its The friction pair of dynamic/stationary ring composition is typically in boundary friction or mixed film friction state, in high parameter operating condition (high temperature, high pressure, high speed Deng) under the conditions of, friction factor is larger, and power consumption is high, and serious wear, the service life is short, operation and maintenance higher cost.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, thus 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 guarantee the long-life of sealing.However, this be sealed in Reply high viscosity, containing operating conditions 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.
Utility model content
The purpose of this utility model is to provide a kind of enhanced non-contact mechanical seal structures of liquid, have so that close The advantages of service life in sealing end face increases.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of enhanced non-contact mechanical seal structure of liquid, including being socketed and fixing axle sleeve on the rotary shaft, set Set the rotary packing ring rotated simultaneously on axle sleeve with axle sleeve, the internal gland being fixed on pump housing, axially along the sleeve sliding set Set on internal gland for the stationary seal ring that cooperate with rotary packing ring and be arranged between stationary seal ring and internal gland for so that Stationary seal ring has the first elastic component to rotary packing ring side movement tendency always, and the rotary packing ring is towards the end of stationary seal ring On face or stationary seal ring is towards offering annular groove on the end face of rotary packing ring, the outside diameter of the rotary packing ring and stationary seal ring and Form the high pressure chest for accommodating highly pressurised liquid between internal gland, the internal side diameter and axle sleeve of the rotary packing ring and stationary seal ring it Between form the low pressure chamber for accommodating low pressure liquid, the outer press cover for cooperating with internal gland is arranged with outside the axle sleeve, it is described It is offered on outer press cover for being passed through the import of cleaning low pressure liquid to low pressure chamber and for for the cleaning low pressure liquid in low pressure chamber The outlet of body outflow, the axle sleeve are provided between axle sleeve and outer press cover for preventing in low pressure chamber far from rotary packing ring end The safety seal structure that cleaning low pressure liquid flows out between axle sleeve and outer press cover.
Through the above technical solutions, rotary shaft is after rotation, it is passed through cleaning low pressure liquid toward entrance, cleans low pressure liquid The security seal that can be entered in low pressure chamber and be flowed at the sealing of rotary packing ring and stationary seal ring under the effect of gravity, and be arranged Structure can allow cleaning low pressure liquid to be normally in low pressure chamber, be not easy to flow out between axle sleeve and outer press cover, reach sealing Effect.Rotary packing ring high speed rotation sucks cleaning low pressure liquid in annular groove and keeps low pressure liquid lateral by the internal diameter of rotary packing ring Outside diameter is mobile, due to the incompressible characteristic of liquid, cleans low pressure liquid at this time and produces between rotary packing ring and stationary seal ring So that stationary seal ring is toward close to the movement of the first elastic component side, at this moment the first elastic component is compressed, is moved close raw certain pressure Seal ring and stationary seal ring are detached from.Enter high pressure chest after being pressurized using low-pressure fluid by annular groove, ensure that rotary packing ring and quiet close Seal ring always works in clean fluid, and granule foreign or high viscosity medium in high pressure chest in medium is avoided to influence sealing fortune Row.The full liquid-film lubrication of seal face and non-contact operation are realized since rotary packing ring and stationary seal ring separate, reduces operation Power consumption and the generation for reducing heat, to considerably increase the service life of sealing.After rotary shaft stops operating, in the first bullet Property part elastic force under stationary seal ring can be adjacent to again with rotary packing ring, formed sealing state.
Preferably, the safety seal structure includes that the rotating ring being arranged on axle sleeve and setting are used for and move on outer press cover Ring tight against stationary ring, had for making stationary ring always to rotating ring side movement tendency is provided between the cavity and stationary ring Two elastic components.
Through the above technical solutions, due to the setting of the second elastic component, so that stationary ring can be supported with the rotating ring on axle sleeve always It is tight and form mechanical seal state, it at this moment cleans after low pressure liquid flows into and is not easy to flow out between stationary ring and rotating ring, and only can be Low pressure chamber internal circulation flow achievees the effect that allow cleaning low pressure liquid normally in low pressure chamber internal circulation flow;And if dynamic sealing After sealing effect failure between ring and stationary seal ring, sealing between rotating ring and stationary ring can secondary prevention highly pressurised liquid pass through Low pressure chamber flows out outer press cover.
Preferably, cooling inclined-plane is provided on the end face that the rotating ring and stationary ring fit.
Through the above technical solutions, can rub since rotary shaft is during high speed rotation, between rotating ring and stationary ring and Heat is generated, therefore cleans low pressure liquid in the process circulated away from axle sleeve side setting cooling inclined-plane in rotating ring and stationary ring In can flow to cooling inclined-plane at, thus take away a part friction generate heat, allow between rotating ring and stationary ring accelerate cooling, reach The effect of cooling abrasive end face.
Preferably, first elastic component is located in low pressure chamber, is provided between the stationary seal ring and the first elastic component First throw-out collar is provided with for preventing the liquid in high pressure chest from contacting with the first elastic component between the internal gland and the first throw-out collar The first sealing ring.
Through the above technical solutions, the first throw-out collar can be toward close to rotary packing ring side under the elastic force effect of the first elastic component It is mobile, to push against stationary seal ring and rotary packing ring to form mechanical seal structure.And between internal gland and the first throw-out collar The setting of one sealing ring enables to the highly pressurised liquid being in high pressure chest to be not easily accessible in low pressure chamber, reach allow first elasticity Part is not easily susceptible to the influence of highly pressurised liquid to keep the effect of preferable elastic stage.
Preferably, it is provided between the axle sleeve and rotary shaft for preventing the liquid in high pressure chest from entering axle sleeve and rotation High-pressure seal ring between axis.
Through the above technical solutions, the setting of high-pressure seal ring can prevent the high pressure liquid in high pressure chest to a certain extent Body enters between axle sleeve and rotary shaft, and highly pressurised liquid is allowed not interfere with the rotation of rotary shaft and axle sleeve, reaches so that rotating The effect that axis can normally drive axle sleeve to rotate.
Preferably, between the low pressure chamber and internal gland, the second sealing ring is provided between internal gland and outer press cover.
Through the above technical solutions, the second sealing ring setting so that the cleaning low pressure liquid being in low pressure chamber be not easy from Gap, internal gland between cavity and internal gland and the gap between outer press cover flow to the external world, do not only reach the effect of sealing, and And also make work condition environment good to a certain extent.
Preferably, the wall surface in low pressure chamber is located on the axle sleeve and is equipped with the cleaning low pressure liquid pumping for flowing into import To the spiral pump structure of outlet, the spiral pump structure includes the pump efficiency ring being arranged on axle sleeve.
It, can be by axle sleeve side when rotary shaft is rotated with certain revolving speed through the above technical solutions, after installation pump efficiency ring Liquid pumping is to the other side of pump efficiency ring.And pump efficiency ring is mounted in low pressure chamber, therefore can in low pressure chamber be located at pump efficiency ring one The cleaning low pressure liquid of side is pumped into the other side of pump efficiency ring, to realize cleaning low pressure liquid quickly following from import to outlet Ring allows and cleans the clean better effect of low pressure liquid.
Preferably, first elastic component includes that the first spring being located on internal gland in low pressure chamber is arranged in, described interior The inside spring base connecting with the first spring is provided on gland, one end of first throw-out collar is provided with to be connect with the first spring The first support ring, first spring one end is connect with inside spring base, the other end is connect with the first support ring.
Through the above technical solutions, being fixed on the first spring on the spring base of inside in elasticity when rotary shaft does not rotate To close to the first throw-out collar side stretching under effect, the first spring drives the first throw-out collar and stationary seal ring close to moving during stretching Seal ring side is close.Due to being provided with the first support ring, so that the supporting surface between the first spring and the first throw-out collar becomes larger, first is allowed Spring can be more stable when pushing the first throw-out collar mobile, and can also prevent the two from generating mutually rotation to a certain extent, from And achieve the effect that anti-rotation.
Preferably, the stationary seat for fixing stationary ring is provided on the outer press cover, second elastic component includes setting Second spring between stationary seat and stationary ring, the stationary ring are provided with second connect with second spring close to second spring end Support ring, described second spring one end is connect with stationary seat, the other end is connect with the second support ring.
Through the above technical solutions, being fixed on the second spring on stationary seat in the effect of elasticity when rotary shaft does not rotate Lower to close to the second throw-out collar side stretching, second spring drives stationary ring close to rotating ring side during stretching, due to being provided with the Two support rings, so that second spring will not directly be contacted with stationary ring, therefore the elastic force that second spring generates will not cause stationary ring Damage, so that the service life is longer for stationary ring.
Preferably, the annular groove is arranged in the internal side diameter of rotary packing ring and stationary seal ring is communicated or be arranged in low pressure chamber It internal side diameter and is communicated with 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 On it is identical by the trend of radially inner side to radial outside and the direction of rotation of rotary packing ring, when annular groove is set to the end of stationary seal ring When on face, the annular groove is on the end face of stationary seal ring by the trend of radially inner side to radial outside and the rotation side of rotary packing ring To opposite.
Through the above technical solutions, rotary shaft rotation, annular groove follows one when annular groove is set on the end face of rotary packing ring Rotation is played, the low pressure cleaning fluid entered in slot is compressed to high pressure and is flowed to high pressure chest, so that end face be made to separate.Its principle It is to utilize the viscosity of liquid big and its incompressible characteristic.Similarly, when annular groove is set on the end face of stationary seal ring, principle It is consistent with above-mentioned principle, it does not repeat excessively herein.After being arranged in this way, enable rotary packing ring and stationary seal ring in the pressure of liquid It is lower to separate and still reach sealing effect.Since in this case, rotary packing ring and stationary seal ring are in discrete state, make Must be contactless between the two, it reduces operation power consumption and reduces the generation of heat, to considerably increase the use longevity of sealing Life.
In conclusion the utility model is increased using low-pressure fluid by annular groove in contrast to having the beneficial effect that for the prior art Enter high pressure chest after pressure, ensure that rotary packing ring and stationary seal ring always work in clean fluid, avoid high pressure chest intermediary Granule foreign or high viscosity medium in matter influence sealing operation.Sealed end is realized since rotary packing ring and stationary seal ring separate The full liquid-film lubrication in face and non-contact operation reduce operation power consumption and reduce the generation of heat, to considerably increase sealing Service life.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of embodiment;
Fig. 2 is the structural schematic diagram of the annular groove end face of embodiment.
Appended drawing reference: 1, rotary shaft;2, axle sleeve;21, rotary packing ring;211, annular groove;22, high-pressure seal ring;3, pump efficiency ring; 4, internal gland;41, stationary seal ring;42, the first spring;43, inside spring base;5, high pressure chest;6, low pressure chamber;7, outer press cover;71, Import;72, it exports;73, stationary seat;8, safety seal structure;81, rotating ring;82, stationary ring;821, second spring;822, second Pushing out ring;9, cool down inclined-plane;10, the first throw-out collar;101, the first support ring;11, the first sealing ring;12, the second sealing ring.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
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 on rotary shaft Axle sleeve 2 on 1, the internal gland 4 being fixed on pump housing, and 2 one end of axle sleeve are provided with rotary packing ring 21, on internal gland 4 along Axle sleeve 2, which slides axially, is provided with stationary seal ring 41, and stationary seal ring 41, which is used to seal with rotary packing ring 21, to be cooperated;Stationary seal ring 41 with The first elastic component is provided between internal gland 4, the first elastic component, which makes stationary seal ring 41 always, to be had to 21 side of rotary packing ring fortune Dynamic trend.Rotary packing ring 21 is towards on the end face of stationary seal ring 41 or stationary seal ring 41 is towards opening on the end face of rotary packing ring 21 Equipped with annular groove 211;In the present embodiment, annular groove 211 is arranged in the internal side diameter of rotary packing ring 21 and communicates with low pressure chamber 6, annular groove 211 is identical as the direction of rotation of rotary packing ring 21 by the trend of radially inner side to radial outside on the end face of rotary packing ring 21; The high pressure chest 5 for accommodating highly pressurised liquid is formed between the outside diameter and internal gland 4 of rotary packing ring 21 and stationary seal ring 41, is moved close The low pressure chamber 6 for accommodating cleaning low pressure liquid, dynamic sealing are formed between the internal side diameter and axle sleeve 2 of seal ring 21 and stationary seal ring 41 Ring 21 is connected to low pressure chamber 6;In the present embodiment, the pressure of the cleaning low pressure liquid in low pressure chamber 6 is relative in high pressure chest 5 Highly pressurised liquid pressure it is lower, the cleaning low pressure liquid in low pressure chamber 6 can be normal pressure, so that the cleaning in low pressure chamber 6 is low Press liquid is not easy to reveal.It is arranged with the outer press cover 7 for cooperating with internal gland 4 outside axle sleeve 2, offers import 71 on outer press cover 7 With outlet 72, import 71 is used to be passed through cleaning low pressure liquid to low pressure chamber 6, and outlet 72 is for for the cleaning low pressure in low pressure chamber 6 Liquid outflow;In order to enable the cleaning low pressure liquid in low pressure chamber 6 can be faster on 6 internal circulation flow of low pressure chamber, axle sleeve 2 Wall surface in low pressure chamber 6 is equipped with the pump efficiency ring 3 that the cleaning low pressure liquid that import 71 flows into is pumped to outlet 72.Rotating ring Cooling inclined-plane 9 is provided on 81 end faces to fit with stationary ring 82, when the cleaning low pressure liquid that import 71 enters is in low pressure chamber 6 When circulating, the setting on cooling inclined-plane 9 so that the cleaning low pressure liquid circulated be easier to take away rotating ring 81 and stationary ring 82 it Between relatively rotate the heat of generation, achieve the effect that cooling.
The pressure of high pressure chest 5 is greater than the pressure in low pressure chamber 6, therefore the highly pressurised liquid in high pressure chest 5 has toward low pressure chamber 6 The trend of interior inflow.And enter high pressure chest 5 after low-pressure fluid is pressurized by annular groove 211 at this time, it ensure that rotary packing ring 21 and quiet Sealing ring 41 always works in clean fluid, avoids the granule foreign of medium or high viscosity medium influence in high pressure chest 5 close Envelope operation, therefore relatively steady state is formed, allow the highly pressurised liquid in high pressure chest 5 to be not easy to flow in low pressure chamber 6.And it revolves at this time Shaft 1 drives rotary packing ring 21 rotating, and realizes the full liquid film of seal face since rotary packing ring 21 is separated with stationary seal ring 41 Lubrication and non-contact operation reduce operation and power consumption and reduce the generation of heat, so that considerably increase sealing uses the longevity Life.
As shown in Figure 1, the first elastic component is that the first spring 42 being located on internal gland 4 in low pressure chamber 6, internal gland is arranged in The inside spring base 43 connecting with the first spring 42 is provided on 4, one end of the first throw-out collar 10 is provided with to be connected with the first spring 42 The first support ring 101 connect;First spring, 42 one end is connect with inside spring base 43, the other end is connect with the first support ring 101.
As shown in Figure 1, being provided with the first throw-out collar 10 between stationary seal ring 41 and the first spring 42, internal gland 4 is pushed away with first The first sealing ring 11 is provided between ring 10.First sealing ring 11 is used to prevent the highly pressurised liquid and the first spring in high pressure chest 5 42 contacts, so that the first spring 42 not will receive the influence of highly pressurised liquid, to improve the service life of the first spring 42.
When rotary shaft 1 rotates, 21 high speed rotation of rotary packing ring sucks cleaning low pressure liquid in annular groove 211 and makes low pressure liquid Body is mobile from the internal side diameter of rotary packing ring 21 to outer diameter side, due to the incompressible characteristic of liquid, cleans low pressure liquid at this time and exists Certain pressure is generated between rotary packing ring 21 and stationary seal ring 41 so that stationary seal ring 41 is toward close to 42 side of the first spring Mobile, at this moment the first spring 42 is compressed, and rotary packing ring 21 and stationary seal ring 41 are detached from, so that cleaning low pressure liquid enters High pressure chest 5 ensure that rotary packing ring 21 and stationary seal ring 41 always work in clean fluid and remain non-contact Sealing also avoids the granule foreign of medium or high viscosity medium in high pressure chest 5 from influencing sealing operation.When rotary shaft 1 does not rotate, The first spring 42 on the spring base 43 of inside is fixed under the action of elasticity to close to 10 side stretching of the first throw-out collar, the first spring 42 drive the first throw-out collar 10 and stationary seal ring 41 close to 21 side of rotary packing ring during stretching so that the first spring 42 with Supporting surface between first throw-out collar 10 becomes larger, and allows the first spring 42 can be more stable when pushing the first throw-out collar 10 mobile, and also It can prevent the two from generating mutually rotation to a certain extent, to achieve the effect that anti-rotation.
As shown in Figure 1, axle sleeve 2 is provided with safety seal structure between axle sleeve 2 and outer press cover 7 far from 21 end of rotary packing ring 8, safety seal structure 8 is for preventing the cleaning low pressure liquid in low pressure chamber 6 from flowing out between axle sleeve 2 and outer press cover 7.Security seal Structure 8 include the rotating ring 81 that is arranged on axle sleeve 2 be arranged on outer press cover 7 for rotating ring 81 tight against stationary ring 82, external pressure The stationary seat 73 for fixing stationary ring 82 is provided on lid 7.Second spring 821 is provided between stationary seat 73 and stationary ring 82, the Two springs 821 make stationary ring 82 have the trend moved to 81 side of rotating ring always.Stationary ring 82 is provided with close to 821 end of second spring The second support ring 822 connecting with second spring 821,821 one end of second spring connect with stationary seat 73, the other end and second Pushing out ring 822 connects.
If the mechanical seal structure after long-term use between rotary packing ring 21 and stationary seal ring 41 fails, at this time rotating ring Sealing between 81 and stationary ring 82 can achieve the effect that secondary seal, so that the liquid in high pressure chest 5 is still not easy to flow to outside Boundary.And the sealing structure between the sealing structure between rotating ring 81 and stationary ring 82 and rotary packing ring 21 and stationary seal ring 41 is similar, Therefore it does not repeat them here.
As shown in Figure 1, being provided with high-pressure seal ring 22 between axle sleeve 2 and rotary shaft 1, high-pressure seal ring 22 is located at axle sleeve 2 Close to 5 end of high pressure chest, high-pressure seal ring 22 enables to the sealing effect between axle sleeve 2 and rotary shaft 1 preferable;Low pressure chamber 6 with Between internal gland 4, the second sealing ring 12 is provided between internal gland 4 and outer press cover 7, the second sealing ring 12 enables to low pressure Cleaning low pressure liquid in chamber 6 is not easy to leak outside, so that it is extraneous to reduce cleaning low pressure liquid pollution to a certain extent.
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 stationary seal ring 41 Internal side diameter and communicated with low pressure chamber 6, annular groove 211 is on the end face of stationary seal ring 41 by the trend of radially inner side to radial outside It is opposite with the direction of rotation of rotary packing ring 21.
Specific work process: after starting rotary shaft 1 drives axle sleeve 2 to rotate, being passed through cleaning low pressure liquid at import 71, this Shi Qingjie low pressure liquid is in 6 internal circulation flow of low pressure chamber and enters in annular groove 211, and rotary packing ring 21 and stationary seal ring 41 are separated And enter in high pressure chest 5, it ensure that rotary packing ring 21 and 41 ring of static seal always work in clean fluid, avoid high pressure chest The granule foreign of medium or high viscosity medium influence sealing operation in 5, and rotary shaft 1 drives rotary packing ring 21 rotating at this time, by Separating in rotary packing ring 21 and stationary seal ring 41 realizes the full liquid-film lubrication of seal face and non-contact operation, reduces operation function The generation of heat is consumed and reduces, to considerably increase the service life of sealing.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but As long as all by the protection of Patent Law in the scope of the claims of the utility model.
The above is only the exemplary embodiment of the utility model, the protection model rather than limited the present invention It encloses, the protection scope of the utility model is determined by the attached claims.

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), be arranged on axle sleeve (2) with axle sleeve (2) simultaneously rotate rotary packing ring (21), be fixed on it is interior on pump housing Gland (4), slide axially the stationary seal ring being arranged on internal gland (4) for cooperating with rotary packing ring (21) along axle sleeve (2) (41) and it is arranged between stationary seal ring (41) and internal gland (4) for so that stationary seal ring (41) has always to rotary packing ring (21) the first elastic component of side movement tendency, the rotary packing ring (21) is towards on the end face of stationary seal ring (41) or stationary seal ring (41) towards offering annular groove (211) on the end face of rotary packing ring (21), the rotary packing ring (21) and stationary seal ring (41) The high pressure chest (5) for accommodating highly pressurised liquid, the rotary packing ring (21) and static seal are formed between outside diameter and internal gland (4) The low pressure chamber (6) for accommodating low pressure liquid is formed between the internal side diameter and axle sleeve (2) of ring (41), is arranged outside the axle sleeve (2) There is the outer press cover (7) for cooperating with internal gland (4), is offered on the outer press cover (7) for being passed through cleaning to low pressure chamber (6) The import (71) of low pressure liquid and the outlet (72) for being flowed out for the cleaning low pressure liquid in low pressure chamber (6), the axle sleeve (2) It is provided between axle sleeve (2) and outer press cover (7) for preventing the cleaning low pressure in low pressure chamber (6) far from rotary packing ring (21) end The safety seal structure (8) that liquid flows out between axle sleeve (2) and outer press cover (7).
2. the enhanced non-contact mechanical seal structure of liquid according to claim 1, it is characterised in that: the safety is close Seal structure (8) include setting on axle sleeve (2) rotating ring (81) and be arranged on outer press cover (7) for rotating ring (81) tight against Stationary ring (82) is provided between the outer press cover (7) and stationary ring (82) and is used for so that stationary ring (82) has always to rotating ring (81) Second elastic component of side movement tendency.
3. the enhanced non-contact mechanical seal structure of liquid according to claim 2, it is characterised in that: the rotating ring (81) cooling inclined-plane (9) is provided on the end face to fit with stationary ring (82).
4. the enhanced non-contact mechanical seal structure of liquid according to claim 1, it is characterised in that: first bullet Property part be located in low pressure chamber (6), be provided between the stationary seal ring (41) and the first elastic component the first throw-out collar (10), it is described in The first sealing ring for preventing the highly pressurised liquid in high pressure chest (5) from leaking is provided between gland (4) and the first throw-out collar (10) (11)。
5. the enhanced non-contact mechanical seal structure of liquid according to claim 1, it is characterised in that: the axle sleeve (2) be provided between rotary shaft (1) for prevent the highly pressurised liquid in high pressure chest (5) enter axle sleeve (2) and rotary shaft (1) it Between high-pressure seal ring (22).
6. the enhanced non-contact mechanical seal structure of liquid according to claim 1, it is characterised in that: the low pressure chamber (6) the second sealing ring (12) are provided between internal gland (4), between internal gland (4) and outer press cover (7).
7. the enhanced non-contact mechanical seal structure of liquid according to claim 1, it is characterised in that: the axle sleeve (2) wall surface in low pressure chamber (6), which is equipped with, is pumped to outlet (72) for the cleaning low pressure liquid that import (71) flow into Spiral pump structure, the spiral pump structure include the pump efficiency ring (3) being arranged on axle sleeve (2).
8. the enhanced non-contact mechanical seal structure of liquid according to claim 4, it is characterised in that: first bullet Property part include first spring (42) of the setting in the low pressure chamber (6) on internal gland (4), be provided on the internal gland (4) The inside spring base (43) connecting with the first spring (42), one end of first throw-out collar (10) are provided with and the first spring (42) The first support ring (101) of connection, described first spring (42) one end connect with inside spring base (43), the other end and first Pushing out ring (101) connection.
9. the enhanced non-contact mechanical seal structure of liquid according to claim 2, it is characterised in that: the outer press cover (7) be provided with the stationary seat (73) for fixing stationary ring (82) on, second elastic component include setting stationary seat (73) with Second spring (821) between stationary ring (82), the stationary ring (82) is provided with close to second spring (821) end and second spring (821) the second support ring (822) connected, described second spring (821) one end connect with stationary seat (73), the other end and second Support ring (822) connection.
10. the enhanced non-contact mechanical seal structure of liquid according to claim 1, it is characterised in that: the annular groove (211) internal side diameter in rotary packing ring (21) is set and the internal side diameter in stationary seal ring (41) is communicated or be arranged with low pressure chamber (6) And communicated with low pressure chamber (6), when annular groove (211) is set on the end face of rotary packing ring (21), the annular groove (211) move it is close It is identical as the direction of rotation of rotary packing ring (21) by the trend of radially inner side to radial outside on the end face of seal ring (21), work as annular groove (211) when being set on the end face of stationary seal ring (41), the annular groove (211) is inside by diameter on the end face of stationary seal ring (41) The trend of side to radial outside is opposite with the direction of rotation of rotary packing ring (21).
CN201820759767.6U 2018-05-18 2018-05-18 The enhanced non-contact mechanical seal structure of liquid Active CN208204017U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108468810A (en) * 2018-05-18 2018-08-31 四川日机密封件股份有限公司 The enhanced non-contact mechanical seal structure of liquid
CN113819239A (en) * 2021-09-09 2021-12-21 乔丹 Combined sealing system of cold air fan

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108468810A (en) * 2018-05-18 2018-08-31 四川日机密封件股份有限公司 The enhanced non-contact mechanical seal structure of liquid
CN113819239A (en) * 2021-09-09 2021-12-21 乔丹 Combined sealing system of cold air fan
CN113819239B (en) * 2021-09-09 2023-08-29 湖北双剑鼓风机股份有限公司 Combined sealing system of air conditioner and fan

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