CN101994681A - A shaft sealing structure of a steam compressor in a vacuum concentration device - Google Patents
A shaft sealing structure of a steam compressor in a vacuum concentration device Download PDFInfo
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- CN101994681A CN101994681A CN2010102333881A CN201010233388A CN101994681A CN 101994681 A CN101994681 A CN 101994681A CN 2010102333881 A CN2010102333881 A CN 2010102333881A CN 201010233388 A CN201010233388 A CN 201010233388A CN 101994681 A CN101994681 A CN 101994681A
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- steam
- sealing
- vacuum
- compression machine
- vapour compression
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Abstract
The present invention provides a dry-type shaft sealing structure of a steam compressor in a vacuum concentration device, capable of preventing leakage air from steam. The sealing structure comprises: a dry-type sealing part, in which a sealing surface is of a contact state when a rotating shaft of the steam compressor does not rotate, and the sealing surface is of a non-contact state by a film formed by draw-in air from an airframe when the rotating shaft rotates; a space for air suction, for merging leakage air from the sealing surface of the dry-type sealing part and leakage steam from a steam compression chamber where the inhalant steam is compressed; an aspirating hole, communicate with the space for the air suction; a vacuum pump, for making a state that a vacuum degree is higher than that of the inner of the airframe; a discharge pipe for air suction, connected with the aspirating hole and the vacuum pump. The leakage air and leakage steam is discharged from the space through the discharge pipe by means of the vacuum pump.
Description
Technical field
The present invention relates to a kind of evaporating and concentrating process that is used for waste liquid etc., the axle sealing structure of the vapour compression machine of in vacuum concentrating apparatus, equipping.
Background technique
As of the shaft sealing of present vacuum concentrating apparatus with vapour compression machine, vapour compression machine is under the small-sized situation, employed is contact-type mechanical seal (example: with reference to patent documentation 1), under vapour compression machine was large-scale situation, employed was the steam clean formula (example: with reference to patent documentation 2) of utilizing multistage labyrinth.
But, under the situation of mechanical seal, exist because of frictional loss and cause energy consumption big and be unsuitable for shortcoming such as high speed rotating.Under the situation of labyrinth seal, there is complex structure, so and because of using steam to be unsuitable for the such shortcoming of situation of no boiler equipments such as semiworks.
Patent documentation 1: Japanese kokai publication hei 7-208612 communique
Patent documentation 2: Japanese kokai publication hei 10-110831 communique
Therefore, in order to address the above problem,, consider to use dry-type encapsulated as the shaft sealing of the vapour compression machine of vacuum concentrating apparatus.But, using when dry-type encapsulated, the air of leakage enters steam side and causes dysgenic problem to become the obstacle of research to temperature conductivity, dry-type encapsulatedly is not used so far.
Summary of the invention
The present application is founded in view of above-mentioned problem, and its purpose is to provide a kind of use dry-type encapsulated, and prevents that leakage air from entering the axle sealing structure of the vacuum concentrating apparatus of steam side with vapour compression machine.
For achieving the above object, the invention provides the axle sealing structure of a kind of vacuum concentrating apparatus with vapour compression machine, it is characterized in that, possess: dry-type encapsulated portion, when its running shaft at vapour compression machine does not rotate, make sealing surface be in contact condition, when described running shaft rotates, on sealing surface, make sealing surface be in contactless state across the film that forms from the engine body exterior inhaled air; Bleed and use the space, it makes from the leakage air of the sealing face leakage of described dry-type encapsulated portion with from the leaked steam of the both vapor compression chamber leakage that the steam to suction compresses and collaborates; Bleeder hole, it is connected with the space with described bleeding; Vacuum source, it generates the degree of vacuum state higher than the degree of vacuum of internal body; The discharge tube of bleeding, it connects described bleeder hole and vacuum source, utilizes described vacuum source that described bleeding is discharged to the outside with leakage air in the space and leaked steam via the discharge tube of bleeding.
By said structure,, invade steam compressed chamber and vapor mixing so can prevent leakage air because leakage air and leaked steam are discharged to the outside.Therefore, temperature conductivity can not worsen, and can carry out the running of device safely.And, by using dry-type encapsulated such noncontact seal, compare no friction loss with contact seal, can realize significantly energy-conservation.
The present invention preferably, described dry-type encapsulated portion possesses: sealing and fixing is installed on the housing of vapour compression machine in the rotating ring of the running shaft of vapour compression machine, sealing and the retaining ring that can move in the axial direction, to retaining ring vertically to the force application mechanism of the rotating ring application of force, be formed with the kinetic pressure groove at the sealing surface of the described rotating ring of facing with the sealing surface of described retaining ring.
In addition, among the present invention, also be provided with labyrinth structure more than 1 being communicated with gap between described both vapor compression chamber and the described dry-type encapsulated portion sometimes.According to such structure, suppress air leakage and arrive air side to steam side and steam leakage.
According to the present invention, can prevent leakage air intrusion both vapor compression chamber and vapor mixing, consequently temperature conductivity can not worsen, and can carry out the running of device safely.And, by using dry-type encapsulated such noncontact seal, compare no friction loss with contact seal, can realize significantly energy-conservation.
Description of drawings
Fig. 1 is the whole pie graph of vacuum concentrating apparatus that possesses the vapour compression machine of mode of execution;
Fig. 2 is the pie graph of vapour compression machine;
Fig. 3 is near the enlarged view the vapour compression machine sealed department;
Fig. 4 is the figure of an example of expression labyrinth structure.
Symbol description
1: vacuum concentration equipment 2: vaporizer
3: vapour compression machine 13: vacuum pump
20: suction pipe 22: the discharge tube of bleeding
30: running shaft 37: housing
38: both vapor compression chamber 40: axle sealing structure
41: dry-type encapsulated 42: bleed and use the space
43: bleeder hole 44: rotating ring
45: retaining ring 46: spring (force application mechanism)
60,61,62: labyrinth structure 70: air hole
Embodiment
Below, based on mode of execution the present invention is described in detail.In addition, the invention is not restricted to following mode of execution.
Fig. 1 is the whole pie graph of vacuum concentration equipment that possesses the vapour compression machine of mode of execution.Vacuum concentration equipment 1 possesses: the horizontal tubular evaporator 2 of the treatment fluid that evaporation is supplied to and the vapour compression machine 3 that initial steam is sent out in heat insulation compression, and constitute, will make the steam after temperature and pressure rises return horizontal tubular evaporator 2 by vapour compression machine 3 as the thermal source that is used for evaporation process liquid.
Horizontal tubular evaporator 2 comprises evaporating pot 4, and this evaporating pot 4 forms tubular, can be at the internal reservoir treatment fluid.Be provided with by collector 5a, the 5b of pairing left and right on the top of evaporating pot 4 and heater 5 that a plurality of horizontal heat-transfer pipe 5c that links between with these two collector 5a, 5b forms.Collector 5a is disposed at the side that steam enters, and collector 5b is disposed at the side that steam is discharged.Be connected with the pipe 6 of the condensed water that is used to discharge heating steam at collector 5b, dispose the condensate pump 7 that is used to discharge condensed water at this pipe 6.
In addition, horizontal tubular evaporator 2 comprises the circulation stream of treatment fluid.Dispose recycle pump 8 and dispenser 9 at the circulation stream.Recycle pump 8 is connected in the bottom of evaporating pot 4.Recycle pump 8 can be transferred to dispenser 9 by managing 10 treatment fluids that will be stored in evaporating pot 4.In addition, recycle pump 8 can be by outside pipe 11 the part discharge systems with treatment fluid.Dispenser 9 can be gone up the horizontal heat-transfer pipe 5c of direction from horizontal heat-transfer pipe 5c with treatment fluid and scatter.
Horizontal tubular evaporator 2 possesses the steam that is used for treatment fluid and is discharged to the outside pipe 12 as discharge tube.The vapour compression machine 3 that works as heat pump links to each other with pipe 12.Vapour compression machine 3 forms, and outlet side is connected with the collector 5a of heater 5, the steam on evaporating pot 4 tops can be transferred to collector 5a.Vapour compression machine 3 forms the steam that sucks evaporating pot 4 inside and compresses intensification.Vacuum pump 13 is connected in the collector 5b of heater 5.By this vacuum pump 13 inside of evaporating pot 4 and the inside of vapour compression machine 3 are remained vacuum.In addition, the pipe 14 that the outlet side of vapour compression machine 3 and collector 5a are linked links to each other with the pipe 15 of supplying with initial steam, can supply with external heat when startup and during the auxiliary thermal source of the temperature that need be used to keep on the go.
In addition, be connected with the suction pipe 20 that sucks air, dispose air filter 21 midway at this suction pipe 20 at vapour compression machine 3.Therefore, outside air filters out impurities by air filter 21, is inhaled into vapour compression machine 3 as peace and quiet air.
In addition, vapour compression machine 3 is connected with an end of the discharge tube 22 of bleeding, and the other end of this discharge tube 22 of bleeding is connected with vacuum pump 13.In addition, a bleed end of discharge tube 22 is connected (with reference to Fig. 3) with the bleeder hole 43 of vapour compression machine 3 described later.
The summary of the processing action of the vacuum concentrating apparatus of above-mentioned formation is as follows.Utilize the driving of vacuum pump 13 that evaporating pot 4 inside are remained vacuum.Treatment fluids such as waste liquid (stoste) are fed to pipe 10 by supplying pipe 25.Then, the treatment fluid that utilizes the driving of recycle pump 8 will be stored in evaporating pot 4 supplies to dispenser 9 by managing 10, scatters to horizontal heat-transfer pipe 5c from dispenser 9.The treatment fluid that scatters by dispenser 9 evaporates at the surface film of horizontal heat-transfer pipe 5c.Sucked by vapour compression machine 3 by managing 12 at the steam of the surface evaporation of horizontal heat-transfer pipe 5c, in vapour compression machine 3,, after temperature and pressure rise, be sent to collector 5a by heat insulation compression.Enter the inboard that steam behind the collector 5a is directed to horizontal heat-transfer pipe 5c, condense when making the circulating liquid evaporation that is dispersed in the horizontal heat-transfer pipe 5c outside, become condensed water and flow into collector 5b.And condensed water is by outside the condensate pump 7 discharge systems.By so repeatedly technology, circulating liquid is concentrated, as extracting liquid outside the outlet discharge system of recycle pump 8.
Fig. 2 is the pie graph of vapour compression machine.With reference to Fig. 2 the formation of vapour compression machine 3 is described.In vapour compression machine 3, blade 31 is installed on running shaft 30.To attracted to the both vapor compression intensification of vapour compression machine 3 by the rotation of this blade 31.The running shaft 30 that blade 31 is installed utilizes 32 supportings of bearing portion for rotating.Bearing portion 32 by bearing housing 33, outer ring 34, inner ring 35, be located in rolling element 36 between outer ring 34 and the inner ring 35 etc. and constitute.And blade 31, running shaft 30, bearing portion 32 are incorporated in the housing 37.In addition, take in the both vapor compression chamber 38 of blade 31 and be depressurized to about 20-30KPs.In addition, between bearing portion 32 and both vapor compression chamber 38, be provided with axle sealing structure 40.
Fig. 3 is near the enlarged view the axle sealing structure.Axle sealing structure 40 possesses: dry-type encapsulated 41, make from the leakage air of dry-type encapsulated 41 sealing face leakage and from the both vapor compression chamber the bleeding of the 38 leaked steam interflow of leaking with space 42, with the bleeder hole 43 that is connected with space 42 of bleeding etc.
Possess for dry-type encapsulated 41: rotating ring 44 and the sealing of sealing and fixing on the running shaft 30 of vapour compression machine 33 is installed on the housing 37 and the retaining ring 45 that can move in the axial direction, rotating ring 44 and retaining ring 45 sealing surface 44a, 45a each other connected, retaining ring 45 is movable in the axial direction under sealing state, and, make sealing surface 45a to the close sealing surface 44a direction application of force by spring 46 (force application mechanism).Be formed with spiral helicine dynamic pressure generation trough (not shown) on the rotating ring 44.Dynamic pressure generation trough is used for will enclosing fluid (present embodiment is air) and is sent to and forms thin fluid film (being air film in the present embodiment) between sealing surface when running shaft 30 rotation.
Rotating ring 44 is fixed with the ring-type holding member 48 that is fixed on sleeve 47 by the coaxial outer sleeve 47 that inserts in running shaft 30 and is kept.In addition, sleeve 47 is fixed on the running shaft 30 by not shown fixed mechanism.And, be folded with O-ring seals 49,50 respectively between sleeve 47 and the rotating ring 44 and between holding member 48 and the rotating ring 44.Therefore, rotating ring 44 becomes the sealed state that is fixed on the running shaft 30.
Retaining ring 45 keeps by sealed holding member 51 sealing that is fixed on the housing 37, and movable in the axial direction, and, by spring 46 with the sealing surface 45a of retaining ring 45 to the direction application of force near the sealing surface 44a of rotating ring 44.At this, between the outer circumferential face of the inner peripheral surface of housing 37 and holding member 51, be folded with O-ring seals 52, between holding member 51 and retaining ring 45, be folded with O-ring seals 53, make retaining ring 45 axially-moveable under sealing state thus.
Bleeding is formed between dry-type encapsulated 41 and the both vapor compression chamber 38 with space 42, realize as make from the leakage air of dry-type encapsulated 41 sealing face leakage and from the both vapor compression chamber function in the zone at the 38 leaked steam interflow of leaking.This bleeds and is connected with bleeder hole 43 with space 42, and bleeder hole 43 is connected with the discharge tube 22 of bleeding.At this, vacuum pump 13 generates the state that degree of vacuum is higher than the degree of vacuum of vapour compression machine 3 inside, therefore, utilizes vacuum pump 13, is discharged to outside the system via the discharge tube 22 of bleeding being trapped in the leakage air and the leaked steam of bleeding with space 42.
In addition, in the gap that the inner peripheral surface of outer circumferential face by sleeve 47 and holding member 51 forms, both vapor compression chamber 38 and bleed and be provided with labyrinth structure 60 with the gap between the space 42.Sealing surfaces in the gap that the inner peripheral surface by the outer circumferential face of sleeve 47 and holding member 51 forms, dry-type encapsulated 41 and bleed and be provided with labyrinth structure 61 with the gap between the space 42.And, be provided with labyrinth structure 62 in the bottom of bleeding with space 42.These labyrinth structures 60-62 can use sealing fin 63 shown in Figure 4, also can be other shape.In a word, be mainly by the concavo-convex shape that flows that makes and get final product with resistance.
By above-mentioned labyrinth structure 60-62, suppress air leakage and arrive air side to steam side and steam leakage.In addition, at the outer circumferential face of sleeve 47, more be provided with the usefulness groove 85 that dewaters by the position of both vapor compression chamber 38 sides than labyrinth structure 60.
In addition, be provided with outside air in the gap that the inner peripheral surface of outer circumferential face by holding member 48 and housing 37 forms with labyrinth structure 64.This labyrinth structure 64 is also identical with labyrinth structure 60～62, can use sealing fin 63 shown in Figure 4, also can be other shape.In a word, mainly be to get final product by the concavo-convex shape that flows that makes with resistance.In addition, be provided with oil removing guard ring 90 in bearing portion 32 side end faces of holding member 48.Prevent to enter steam side with guard ring 90 by this oil removing from the lubricant oil that bearing portion 32 disperses.In addition, the expression of 100～102 among Fig. 3 fixing pin.
Effect to the axle sealing structure of above-mentioned formation describes below.When the running shaft 30 of vapour compression machine 3 stops, utilizing the elastic force of spring 46 to make sealing surface 44a become contact condition with sealing surface 45a.
During running shaft 30 rotations, make sealing surface produce kinetic pressure by rotation.At this moment, because internal body remains on vacuum state, so clean air is invaded internal bodies from air hole 70 in advance, and this air is pressed between sealing surface, at sealing surface 44a and sealing surface 45a formation air film as thin as a wafer.Utilize this air film to make sealing surface 44a become contactless state, can obtain sealing state with not producing sliding friction with sealing surface 45a.Like this, in the present embodiment, only be provided with the air hole 70 that is communicated with internal body, outside air can be invaded internal body, makes retaining ring 41 to the direction action that deviates from rotating ring 40, and sealing surface is opened, and need not to inject sealing and uses gas, can make designs simplification.
On the other hand, because of dry-type encapsulated 41 sealing state is incomplete, so air is from sealing face leakage.This leakage air is imported into bleeds with space 42.On the other hand, 38 leaked steam of leaking are imported into the usefulness space 42 of bleeding from the both vapor compression chamber.And leakage air and leaked steam are discharged to outside with space 42 by bleeder hole 43, the discharge tube 22 of bleeding from bleeding.Therefore, can prevent that leakage air from entering both vapor compression chamber 38 and vapor mixing.The deterioration of leakage air and temperature conductivity that vapor mixing causes consequently can not take place, and device is turned round safely.And dry-type encapsulated by using, the power consumption that sliding friction causes is compared with contact seal near 0, can realize the significantly reduction of consumed power.
Utilizability on the industry
The present invention is applicable to the sealing structure of Vacuum Concentration device with the steam compressor.
Claims (3)
1. a vacuum concentrating apparatus is characterized in that possessing with the axle sealing structure of vapour compression machine:
Dry-type encapsulated portion when its running shaft at vapour compression machine does not rotate, makes sealing surface be in contact condition, when described running shaft rotates, makes sealing surface be in contactless state across the film that forms from the engine body exterior inhaled air on sealing surface;
Bleed and use the space, it makes from the leakage air of the sealing face leakage of described dry-type encapsulated portion with from the leaked steam of the both vapor compression chamber leakage that the steam to suction compresses and collaborates;
Bleeder hole, it is connected with the space with described bleeding;
Vacuum source, it generates the degree of vacuum state higher than the degree of vacuum of internal body;
The discharge tube of bleeding, it connects described bleeder hole and vacuum source,
Utilize described vacuum source that described bleeding is discharged to the outside with leakage air in the space and leaked steam via the discharge tube of bleeding.
2. vacuum concentrating apparatus is characterized in that with the axle sealing structure of vapour compression machine according to claim 1,
Described dry-type encapsulated portion possesses: sealing and fixing the rotating ring on the running shaft of vapour compression machine, sealing be installed on the housing of vapour compression machine and the retaining ring that can move in the axial direction, to retaining ring vertically to the force application mechanism of the rotating ring application of force,
Sealing surface at the described rotating ring of facing with the sealing surface of described retaining ring is formed with the kinetic pressure groove.
3. vacuum concentrating apparatus is characterized in that with the axle sealing structure of vapour compression machine as claimed in claim 1 or 2,
Gap between connection described both vapor compression chamber and described dry-type encapsulated portion is provided with the labyrinth structure more than 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-191655 | 2009-08-21 | ||
| JP2009191655A JP5397998B2 (en) | 2009-08-21 | 2009-08-21 | Shaft seal structure of vapor compressor for vacuum concentrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101994681A true CN101994681A (en) | 2011-03-30 |
| CN101994681B CN101994681B (en) | 2013-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010233388 Active CN101994681B (en) | 2009-08-21 | 2010-07-19 | A shaft sealing structure of a steam compressor in a vacuum concentration device |
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| Country | Link |
|---|---|
| JP (1) | JP5397998B2 (en) |
| CN (1) | CN101994681B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536879A (en) * | 2010-12-21 | 2012-07-04 | 哈米尔顿森德斯特兰德公司 | Seal shaft for controlling fluid flow within an air cycle machine |
| CN102588287A (en) * | 2012-02-08 | 2012-07-18 | 奉化市釜用密封件有限公司 | Mechanical sealing parts of Roots blower and lubricating method thereof |
| CN104093987A (en) * | 2011-12-13 | 2014-10-08 | 伊格尔博格曼德国有限公司 | Rotary compressor |
| CN109595169A (en) * | 2019-01-14 | 2019-04-09 | 冰轮环境技术股份有限公司 | Oil free screw compressor sealing mechanism and control method |
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| US4632402A (en) * | 1983-12-01 | 1986-12-30 | Atlas Copco Aktiebolag | Shaft seal with both hydrostatic and hydrodynamic pressure parts |
| EP1113176A2 (en) * | 1999-12-27 | 2001-07-04 | Leybold Vakuum GmbH | Vacuum pump with a shaft seal |
| CN200958603Y (en) * | 2006-08-31 | 2007-10-10 | 华南理工大学 | Assembled mechanical sealer |
| CN101135377A (en) * | 2006-08-31 | 2008-03-05 | 华南理工大学 | Combined mechanical sealing device |
| CN201277197Y (en) * | 2008-09-19 | 2009-07-22 | 张家港华青科技有限公司 | Dual mechanical sealing device in oil-gas mixed transportation pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0182372U (en) * | 1987-11-24 | 1989-06-01 | ||
| KR950009993Y1 (en) * | 1989-01-30 | 1995-11-25 | 가부시끼 가이샤 사사꾸라 기까이 세이샤꾸쇼 | Evaporating apparatus for vapour compression |
| US6454268B1 (en) * | 2001-02-09 | 2002-09-24 | Eagle Industry Co., Ltd. | Shaft seal device |
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2009
- 2009-08-21 JP JP2009191655A patent/JP5397998B2/en active Active
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2010
- 2010-07-19 CN CN 201010233388 patent/CN101994681B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4632402A (en) * | 1983-12-01 | 1986-12-30 | Atlas Copco Aktiebolag | Shaft seal with both hydrostatic and hydrodynamic pressure parts |
| EP1113176A2 (en) * | 1999-12-27 | 2001-07-04 | Leybold Vakuum GmbH | Vacuum pump with a shaft seal |
| CN200958603Y (en) * | 2006-08-31 | 2007-10-10 | 华南理工大学 | Assembled mechanical sealer |
| CN101135377A (en) * | 2006-08-31 | 2008-03-05 | 华南理工大学 | Combined mechanical sealing device |
| CN201277197Y (en) * | 2008-09-19 | 2009-07-22 | 张家港华青科技有限公司 | Dual mechanical sealing device in oil-gas mixed transportation pump |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536879A (en) * | 2010-12-21 | 2012-07-04 | 哈米尔顿森德斯特兰德公司 | Seal shaft for controlling fluid flow within an air cycle machine |
| CN102536879B (en) * | 2010-12-21 | 2015-06-17 | 哈米尔顿森德斯特兰德公司 | Seal shaft for controlling fluid flow within an air cycle machine |
| CN104093987A (en) * | 2011-12-13 | 2014-10-08 | 伊格尔博格曼德国有限公司 | Rotary compressor |
| CN102588287A (en) * | 2012-02-08 | 2012-07-18 | 奉化市釜用密封件有限公司 | Mechanical sealing parts of Roots blower and lubricating method thereof |
| CN102588287B (en) * | 2012-02-08 | 2014-11-05 | 奉化市釜用密封件有限公司 | Mechanical sealing parts of Roots blower and lubricating method thereof |
| CN109595169A (en) * | 2019-01-14 | 2019-04-09 | 冰轮环境技术股份有限公司 | Oil free screw compressor sealing mechanism and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5397998B2 (en) | 2014-01-22 |
| JP2011043101A (en) | 2011-03-03 |
| CN101994681B (en) | 2013-05-01 |
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