CN106460819A - Compressor aftercooler bypass with integral water separator - Google Patents
Compressor aftercooler bypass with integral water separator Download PDFInfo
- Publication number
- CN106460819A CN106460819A CN201480079914.XA CN201480079914A CN106460819A CN 106460819 A CN106460819 A CN 106460819A CN 201480079914 A CN201480079914 A CN 201480079914A CN 106460819 A CN106460819 A CN 106460819A
- Authority
- CN
- China
- Prior art keywords
- air
- mixing chamber
- aftercooler
- temperature
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
Abstract
An aftercooler bypass system for selectively allowing a portion of the hot compressed gases exiting an air compressor to bypass an aftercooler and intermix with the cooled compressed gases exiting the aftercooler in order to ensure that the cooled compressed gases are above a threshold temperature when the ambient air temperature is at or below freezing. The system includes a valve for controlling the amount of air diverted around the aftercooler and a mixing chamber for allowing the valved air supply to intermix with the aftercooler outlet stream. Temperature sensor may be used to measure ambient air temperature and downstream air temperature to control the opening and closing of the valve and maintain the desired mixed air temperature.
Description
Technical field
The present invention relates to compressor aftercooler bypath system, more particularly, to having after one body swimming separator
Cooler bypasses.
Background technology
Railway brake system relies on air compressor to produce the compressed air of Pneumatic braking system inter alia.By
Compression in air leads to for air to be heated to too hot temperature for brakes, and therefore railway air compressor is usual
It is provided with aftercooler, by pressure-air cooling to high 20 °F to 40 °F than ambient temperature.Then, the compressed air of cooling is led to
Cross and be connected to the compressor discharge pipe of the first primary tank and be supplied to the air supply system of locomotive.This delivery pipe can be up to 30
Foot, and may must include several 90 degree of bend pipe.In operating in the winter time, when ambient air temperature may be significantly lower than that ice
During point (32 °F), the vapor in compressed air stream and water smoke can freeze in compressor discharge pipe, thus at least part of ground resistance
Plug air flows to brakes, thus adversely disturbing the operation of brakes.
As it is well known to the skilled in the art, and by being referred to as described by the knowledge hierarchy of hygrometry, certain body
The maximum total amount of the vapor of long-pending in the air is strongly dependent on air themperature, because warm air can retain more than cold air
Many vapor.This effect is characterized as partial pressure saturation pressure.Additionally, as is it well known, steam-laden partial pressure is in this temperature
The maximum vapor of the lower in the air of degree, but regardless of air pressure is how.When air is compressed, the vapor of in the air also will be by
Compression, until steam partial pressure is equal to saturation pressure.For having 10.5:The railway compressor of 1 compression ratio, final result is,
The air inlet with the drying of 9.5% relative humidity is in 100% relative humidity upon compression.Finally, due to the heat of air
Kinetics, the temperature of air is dramatically increased due to compression.For two grades of railway compressors, second level delivery temperature may exceed
300 °F of ambient temperature.
Therefore, the shadow of the water vapour holding capacity of the air based on the temperature-independent and compression water holding capacity to air
Ring, the hot-air discharged from the second level of air compressor may contain substantial amounts of water vapour.When this stream of hot air is compressed
During machine aftercooler, air themperature drops to high 20 °F to 40 °F than ambient temperature.Air at such a temperature is than in the second level
Air under exhaust temperature can keep less water vapour, and therefore extra vapor precipitates as aqueous water and/or water smoke
Separate out.When this aqueous water is transported in compressor discharge pipe, if delivery pipe and surrounding air are cold enough, it may freeze
Knot.Additionally, because leaving the air of compressor high 20 °F to 40 °F than ambient air temperature, it is in compressor discharge pipe
Experience cools down further.Decline with pipeline air temperature, water is by further Precipitation, thus complicating the issue.
Content of the invention
The present invention includes a kind of air compressor for railway brake system, and this air compressor includes integrated rear cold
But device bypass valve and one body swimming separator, to prevent freezing of compressor discharge pipe in operating in the winter time.Integrated rear cooling
The outlet of the second level of compressor is controllably connected to the outlet of aftercooler by device bypass valve.When aftercooler bypass valve is opened
When, from the compressor second level outlet a part of stream of hot air to aftercooler bypass valve assembly mixing chamber, thus bypassing
Aftercooler.Remainder from the hot-air of compressor second level outlet flows through aftercooler, and such as cold after routine
But it is cooled to the temperature exceeding 20 °F to 40 °F than ambient temperature in system like that.This cooling from the air of aftercooler
Part be directed into second entrance port on aftercooler bypass valve assembly to mixing chamber, mixing chamber its with from air
Part I hot-air mixing.In conjunction with air there is new temperature, it is the mass-temperature meansigma methodss of two air streams,
And new outlet air temperature is the result of the relative mass stream of two air streams, this is the fluid ability of opening bypass valve
Result.For example, it is possible to select the fluid ability of opening bypass valve, to provide the new mixing pressure exceeding 140 °F than ambient temperature
Even if so that ambient air temperature is -40 °F, the outlet air temperature being supplied to delivery pipe also will be 100 ° to contracting machine outlet temperature
F.Therefore, even if outlet air temperature can be chosen as having sufficiently high temperature so that after flowing through cold delivery pipe, air
Also there is enough heats, it remains at more than 32 °F, thus preventing freezing in pipeline.
When bypass valve cuts out, from the outlet of the compressor second level all stream of hot airs through aftercooler, and be cooled
To the temperature exceeding 20 °F to 40 °F than ambient temperature.Aftercooler bypass valve is controlled as depending on optional ambient temperature
And/or compressor assembly outlet temperature and be opened or closed.When ambient temperature is less than threshold value (such as 32 °F), aftercooler
Bypass valve is opened.Higher than controlling at a temperature of temperature, aftercooler bypass valve is closed.
Aftercooler bypass valve assembly alternatively includes one body swimming separator, with from outlet air flow remove liquid and
Atomized water.By forming the water separator part of aftercooler bypass valve assembly, when aftercooler bypass valve is opened and Dang Qi
During closing, water separator is operable to.Additionally, packing water separator with aftercooler bypass valve assembly to simplify design, fall
Low cost, eliminates pipeline and connects and contribute to overall compact arrangement.
Brief description
By specific embodiment in detail below is read in conjunction with the accompanying, will be more fully understood and understand the present invention, its
In：
Fig. 1 is the axonometric chart of the aftercooler bypath system according to the present invention；
Fig. 2 is the flow chart of the aftercooler bypath system according to the present invention；And
Fig. 3 is the viewgraph of cross-section of the embodiment of the bypass valve according to the present invention.
Specific embodiment
With reference now to accompanying drawing, wherein identical reference represents identical part all the time, sees aftercooler in FIG
Bypath system 10.System 10 is interconnected to sky via the adapter pipeline 14 that the second level being fluidly interconnected to compressor 12 exports 16
Air compressor 12 is so that at least a portion leaving the air of compressor 12 leaves the aftercooler entrance of conventional aftercooler 20
Pipe 18 can be redirected to system 10.The compressed air leaving the outlet 16 of air compressor 12 is divided by adapter pipeline 14
It flow to the bypass valve assembly 22 with mixing chamber 24.Mixing chamber 24 be also interconnected to aftercooler 20 drain flange 34 so that from
The cooling air driving aftercooler 20 can be mixed with by the hot-air that adapter pipeline 14 shunts.Valve module 22 also includes side
Port valve 26, bypass valve 26 can be selectively opened or closed based on threshold value (such as ambient air temperature), or at least in part
Open.Valve module 22 preferably includes water separator 28, and water separator 28 is attached on valve module 22 and is positioned adjacent to mixed
Close room 24, with assisting, water is removed from the air stream of mixing.Mixing air in mixing chamber 24 then can be via outlet(discharge) flange
42 are supplied to brakes, and wherein, outlet(discharge) flange 42 may be coupled to the main appearance for compressed air is directed to brakes
The Routine purges pipeline of device.When bypass valve 26 cuts out, the compressed air leaving the cooling of aftercooler 20 still passes through mixing
Room 24, so that water separator 28 can remove any undesirable water, is then left to brakes via flange 42.
Bypass valve 26 is preferably dimensioned to provide the booked mixing ratio of bypass air, and therefore works as surrounding air
When temperature is brought down below threshold value (such as, freezing point), result in higher than the predetermined outlet temperature of ambient temperature.It is alternatively, as described below,
Can be based on ambient air temperature control valve 26 adaptively to keep mixing air temperature.Additionally, as shown in figure 1, rear cool down
Device bypass valve assembly 22 can be formed as single, integrated unit, and it can be installed or replace with for being easier at the scene to pacify
Dress or the individual unit repaired.
With reference to Fig. 2, the compressed air that bypass valve 26 selectively allows for leaving compressor 12 bypasses aftercooler 20, then
Mix with the cooling air leaving aftercooler 20 by drain flange 34.Therefore, bypass valve assembly 22 provides aftercooler 20
Directly short bypass so that when bypass valve 26 is opened, be less than by rear cold by the flow resistance of bypass valve assembly 22
But the flow resistance of device 20.As a result, the major part of hot-air will enter in mixing chamber 24 preferentially through bypass valve 26.This cloth
Put the connection than needing to block to aftercooler simultaneously using three-way valve to open to another connection of aftercooler by-pass line simultaneously
Conventional method significantly more simple and cost is lower.
As shown in figure 1, water separator 28 preferably include by aqueous water and atomized water from outlet air flow remove automatic
Drain valve 30.Although drain valve 30 is shown schematically as the electricity on the bottom of the container 32 of water separator 28 in fig. 2
Magnet valve, but drain valve 30 can be additionally comprise the pneumatic guiding drain valve of container bottom, wherein controls solenoid integrated
To in the block of aftercooler bypass valve 22.The container 32 of water separator 28 can include electromagnetic valve 30 and container bottom in valve body
Integral pneumatic between pneumatic guiding drain valve in portion connect so that water separator container can be removed for maintenance and
Do not disturb electric wire or pipeline.
Although bypass valve 26 can be formed using suitable two-port valve as known in the art, bypass valve 26 can also
Made in the feather valve 64 identical mode with the cylinder head of air compressor 12, because these valves are designed in second level gas
Reliably operate under the high temperature and high pressure of cylinder outlet.For example, as shown in figure 3, bypass valve 26 can be included with control signal
52 housing 50, this control signal 52 is used for control and is positioned at the valve being biased in housing 50 and by one or more springs 56
54 position, to move between a closed position and a open position, wherein in closed position, valve 52 is formed with housing 50
Valve seat 58 engage, in open position, valve 52 allows ingress port 60 to connect with outlet port 62.Preferably, valve 54 and valve seat
58 form metal to the contact of metal, reliably to operate under the high moderate pressure being associated with system 10.Ingress port
60 are interconnected to the second level outlet 16 of compressor 12 by adapter pipeline 14, and outlet port 62 is interconnected to mixing chamber 24.
Both feather valves 64 for bypass valve 26 and air compressor 12 are decreased for initial manufacture using identical manufacturing process
Periodically remanufacture and safeguard required various parts.
Although described above is to be begged in the environment of two state aftercooler bypass valves 26 (that is, opening or closing)
By, but bypass valve 26 can be alternatively proportioning valve, its permission controls the outlet temperature of aftercooler 20 in uniform temperature
In the range of.For example, outlet temperature can be controlled by associated controller 36, and associated controller 36 has surrounding air temperature
Spend meter 38 or there is comparability sensor and temperature sensor 40 in the pipeline in mixing chamber 24 downstream.Therefore, Mei Danghuan
Border temperature is freezing point or when being below the freezing point, and can be set to outlet temperature by the aperture of change aftercooler bypass valve 26
100 °F thus provide required high temperature air stream to mixing chamber 24.For example, if ambient temperature is higher than 32 °F, aftercooler
Bypass controller 36 will close aftercooler bypass valve 26, and all volume of air will flow through aftercooler so that compressor
Outlet temperature exceeds 20 °F to 40 °F than ambient temperature.Similarly, when temperature is less than 32, aftercooler bypass controller 36
Bypass valve 26 is opened to enough to maintain outlet temperature to be about 100 °F or desired any temperature.Therefore, bypass valve 26 and control
Device 36 can be configured to supply the closed loop control of outlet temperature, thus provide independent of ambient temperature variable mixing ratio and can
Control outlet temperature.
Claims (19)
1. a kind of aftercooler bypath system, including：
Mixing chamber, it has the first adapter being suitable to the hot compressed air communication of air compressor and is suitable to
The second adapter being in fluid communication with the cooling air emission mouth of aftercooler；
Bypass valve, it is positioned between described first adapter and described mixing chamber, for optionally controlling through described
A connector enters into the amount of the hot compressed air in described mixing chamber；And
Water separator, it is positioned adjacent to described mixing chamber.
2. system according to claim 1, wherein said water separator includes drain valve.
3. system according to claim 2, wherein said drain valve is pneumatically operated.
4. system according to claim 1, also includes controller, and it is operatively interconnected to described bypass valve, described control
Device processed is arranged to operate described valve.
5. system according to claim 4, wherein said controller is set to drop to predetermined threshold when ambient air temperature
Value opens described valve when following.
6. system according to claim 4, also includes the ambient air temperature meter being electrically interconnected with described controller.
7. system according to claim 5, also includes being positioned at the temperature in described mixing chamber downstream.
8. system according to claim 6, wherein said controller is set to, and makes a reservation for when described ambient air temperature is less than
During threshold value, operate described valve so that the air in described mixing chamber downstream is maintained at predetermined temperature.
9. a kind of system for preventing the ice in compressor discharge pipeline from gathering, described system includes：
Air compressor, it has hot compressed air outlet；
Aftercooler, it is fluidly interconnected to described hot compressed air and exports and have cooling air emission mouth；
Conduit, it is fluidly interconnected with the outlet of described hot compressed air；
Bypass valve, it has the input port being fluidly interconnected to described hot compressed air outlet and outlet；
Mixing chamber, it is fluidly interconnected to the described outlet of described bypass valve and described cooling air emission mouth, and has outlet
Flange；And
Water separator, it is positioned adjacent to described mixing chamber.
10. system according to claim 9, wherein said water separator includes drain valve.
11. systems according to claim 10, wherein said drain valve is pneumatically operated.
12. systems according to claim 11, also include operatively being interconnected to the controller of described bypass valve, described control
Device processed is set to operate described valve.
13. systems according to claim 12, wherein said controller is set to drop to when described ambient air temperature
Described valve is opened when below predetermined threshold.
14. systems according to claim 12, also include the ambient air temperature meter being electrically interconnected with described controller.
15. systems according to claim 14, also include being positioned at the temperature in described mixing chamber downstream.
16. systems according to claim 15, wherein said controller is set to, when ambient air temperature is less than predetermined threshold
Described valve is operated so that the air in described mixing chamber downstream is maintained at predetermined temperature during value.
The method that a kind of 17. anti-stagnant ice gather in compressor discharge pipeline, the method comprising the steps of：
Make to leave the part shunting of any hot compressed gas of air compressor away from aftercooler；
Any remainder allowing hot compressed gas is cooled down by described aftercooler；
There is provided mixing chamber, the compressed gas leaving the described cooling of described aftercooler wherein can be with the institute of hot compressed gas
State shunting part to mix, be then departed to described compressor discharge pipeline；
Metering is allowed to enter the amount of the hot compressed gas of the shunting that described mixing chamber is mixed with the compressed gas with described cooling；
With
Separated any water from described mixed gas before described gas exits into described compressor discharge pipeline.
18. methods according to claim 17, wherein metering are allowed to enter described mixing chamber with the pressure with described cooling
The step of the amount of the hot compressed gas of the shunting of contracting gas mixing includes adjusting the hot compression of shunting based on ambient air temperature
The amount of gas.
19. methods according to claim 18, wherein metering are allowed to enter described mixing chamber with the pressure with described cooling
The step of the amount of the hot compressed gas of the shunting of contracting gas mixing is also included based on any in described compressor discharge pipeline
The temperature of air, to adjust the amount of the hot compressed gas of shunting.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2014/042672 WO2015195092A1 (en) | 2014-06-17 | 2014-06-17 | Compressor aftercooler bypass with integral water separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106460819A true CN106460819A (en) | 2017-02-22 |
| CN106460819B CN106460819B (en) | 2018-08-21 |
Family
ID=54935909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480079914.XA Expired - Fee Related CN106460819B (en) | 2014-06-17 | 2014-06-17 | Compressor aftercooler bypass with one body swimming separator |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN106460819B (en) |
| CA (1) | CA2950691C (en) |
| WO (1) | WO2015195092A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708843A (en) * | 2018-05-16 | 2018-10-26 | 昆山钜全金属工业有限公司 | A kind of compressed air circulatory system |
| CN110997435A (en) * | 2017-08-15 | 2020-04-10 | 纽约气闸有限公司 | De-icing system for air compressor aftercooler |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2257572Y (en) * | 1995-09-29 | 1997-07-09 | 西安交通大学 | Mixed water type explosion-proof compressor back cooling apparatus |
| CN1196448A (en) * | 1997-04-15 | 1998-10-21 | 西屋气刹车公司 | Aftercooler with integral bypass line |
| US6045197A (en) * | 1998-09-15 | 2000-04-04 | Haldex Brake Corporation | Aftercooler with thermostatically controlled bypass |
| US6283725B1 (en) * | 1997-07-21 | 2001-09-04 | Westinghouse Air Brake Company | Aftercooler bypass means for a locomotive compressed air system |
| US6540817B1 (en) * | 2000-02-18 | 2003-04-01 | Nabco, Ltd | Hollow fiber membrane dehumidification device |
| CN102725529A (en) * | 2010-01-26 | 2012-10-10 | 纳博特斯克株式会社 | Air compression device for railroad vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011093135A1 (en) * | 2010-01-26 | 2011-08-04 | ナブテスコ株式会社 | Air compression device for railroad vehicle |
-
2014
- 2014-06-17 WO PCT/US2014/042672 patent/WO2015195092A1/en active Application Filing
- 2014-06-17 CN CN201480079914.XA patent/CN106460819B/en not_active Expired - Fee Related
- 2014-06-17 CA CA2950691A patent/CA2950691C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2257572Y (en) * | 1995-09-29 | 1997-07-09 | 西安交通大学 | Mixed water type explosion-proof compressor back cooling apparatus |
| CN1196448A (en) * | 1997-04-15 | 1998-10-21 | 西屋气刹车公司 | Aftercooler with integral bypass line |
| US6283725B1 (en) * | 1997-07-21 | 2001-09-04 | Westinghouse Air Brake Company | Aftercooler bypass means for a locomotive compressed air system |
| US6045197A (en) * | 1998-09-15 | 2000-04-04 | Haldex Brake Corporation | Aftercooler with thermostatically controlled bypass |
| US6540817B1 (en) * | 2000-02-18 | 2003-04-01 | Nabco, Ltd | Hollow fiber membrane dehumidification device |
| CN102725529A (en) * | 2010-01-26 | 2012-10-10 | 纳博特斯克株式会社 | Air compression device for railroad vehicle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110997435A (en) * | 2017-08-15 | 2020-04-10 | 纽约气闸有限公司 | De-icing system for air compressor aftercooler |
| CN110997435B (en) * | 2017-08-15 | 2021-11-09 | 纽约气闸有限公司 | De-icing system for air compressor aftercooler |
| CN108708843A (en) * | 2018-05-16 | 2018-10-26 | 昆山钜全金属工业有限公司 | A kind of compressed air circulatory system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015195092A1 (en) | 2015-12-23 |
| CA2950691A1 (en) | 2015-12-23 |
| CA2950691C (en) | 2017-03-07 |
| CN106460819B (en) | 2018-08-21 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| GR01 | Patent grant | ||
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Granted publication date: 20180821 Termination date: 20200617 |