CN106460819B - Compressor aftercooler bypass with one body swimming separator - Google Patents
Compressor aftercooler bypass with one body swimming separator Download PDFInfo
- Publication number
- CN106460819B CN106460819B CN201480079914.XA CN201480079914A CN106460819B CN 106460819 B CN106460819 B CN 106460819B CN 201480079914 A CN201480079914 A CN 201480079914A CN 106460819 B CN106460819 B CN 106460819B
- Authority
- CN
- China
- Prior art keywords
- air
- aftercooler
- mixing chamber
- temperature
- passing 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.)
- Expired - Fee Related
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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
A kind of aftercooler bypass system, it is used to selectively allow for leave a part for the hot compressed gas of air compressor and bypasses aftercooler, and it is mixed with the cooling compressed gas for leaving aftercooler, to ensure the compressed gas cooled down when ambient air temperature is in freezing point or is below the freezing point on threshold temperature.The system includes：Valve is used to control the air capacity shunted around aftercooler；And mixing chamber, it is to be mixed with aftercooler outlet stream to be used to allow air supply valve-controlled.Temperature sensor can be used for measuring environment air themperature and air temperature downstream, with the opening and closing of control valve and keep desired mixing air temperature.
Description
Technical field
The present invention relates to compressor aftercooler bypath systems, after with one body swimming separator
Cooler bypasses.
Background technology
Railway brake system relies on air compressor to generate the compressed air of Pneumatic braking system inter alia.By
Cause for air to be heated to too hot temperature for braking system in the compression of air, therefore railway air compressor is usual
It is provided with aftercooler, compressed air is cooled to 20 °F to 40 °F higher than environment temperature.Then, cooling compressed air is logical
It crosses and is connected to the compressor discharge pipe of the first primary tank and is supplied to the air supply system of locomotive.The delivery pipe can be up to 30
Foot, and may must include several 90 degree of bend pipes.In operating in winter, when ambient air temperature may be significantly lower than that ice
When point (32 °F), vapor and water mist in compressed air stream can freeze in compressor discharge pipe, thus at least partly ground resistance
Plug air flows to braking system, to adversely interfere the operation of braking system.
As it is well known to the skilled in the art, and by described in the knowledge hierarchy of referred to as hygrometry, certain body
The maximum total amount of vapor in long-pending air is strongly dependent on air themperature, because warm air can retain more than cold air
More vapor.The effect is characterized as partial pressure saturation pressure.In addition, as is it well known, steam-laden partial pressure is in the temperature
Maximum vapor in the lower air of degree, but regardless of air pressure how.When air is compressed, vapor in 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 be,
The air inlet of drying with 9.5% relative humidity will be upon compression in 100% relative humidity.Finally, due to the heat of air
The temperature of dynamics, air is dramatically increased due to compression.For two level railway compressor, second level delivery temperature may be higher by
300 °F of environment temperature.
Therefore, the water vapour holding capacity of the air based on temperature-independent and compression are to the shadow of the water holding capacity of air
It rings, the hot-air being discharged from the second level of air compressor may contain a large amount of water vapour.When this stream of hot air is compressed
When machine aftercooler, air themperature drops to 20 °F to 40 °F higher than environment temperature.Air ratio at such a temperature is in the second level
Air under exhaust temperature can keep less water vapour, therefore additional vapor is precipitated as liquid water and/or water mist
It is precipitated.When the liquid water is transported in compressor discharge pipe, if delivery pipe and surrounding air are cold enough, may freeze
Knot.In addition, because the air for leaving compressor is 20 °F to 40 °F higher than ambient air temperature, in compressor discharge pipe
Experience is further cooling.As pipeline air temperature declines, water is by further Precipitation, to complicate the issue.
Invention content
The present invention includes a kind of air compressor for railway brake system, which includes integrated rear cold
But device by-passing valve and one body swimming separator, to prevent freezing for compressor discharge pipe in operating in winter.Integrated postcooling
The outlet of the second level of compressor is controllably connected to the outlet of aftercooler by device by-passing valve.When aftercooler by-passing valve is opened
When, the mixing chamber of a part of stream of hot air from the outlet of the compressor second level to aftercooler bypass valve assembly, to bypass
Aftercooler.The remainder of hot-air from the outlet of the compressor second level flows through aftercooler, and cold such as after routine
But it is cooled to like that in system and is higher by 20 °F to 40 °F of temperature than environment temperature.The cooling of air from aftercooler
Part be directed into the second entrance port on aftercooler bypass valve assembly to mixing chamber, mixing chamber its with from air
First part hot-air mixing.In conjunction with air have new temperature, be the mass-temperature average value of two air streams,
And new outlet air temperature is the relative mass stream of two air streams as a result, this is the fluid ability of opening by-passing valve
As a result.For example, the fluid ability of opening by-passing valve can be selected, to provide the new mixing pressure for being higher by 140 °F than environment temperature
Contracting machine outlet temperature so that even if ambient air temperature will be 100 ° if being -40 °F of outlet air temperatures for being supplied to delivery pipe
F.Therefore, outlet air temperature can be chosen as with sufficiently high temperature so that even if after flowing through cold delivery pipe, air
Also there is enough heats, 32 °F or more are remained at, to prevent freezing in pipeline.
When by-passing valve is closed, all stream of hot air from the outlet of the compressor second level are cooled through aftercooler
To the temperature for being higher by 20 °F to 40 °F than environment temperature.Aftercooler by-passing valve is controlled as depending on optional environment temperature
And/or compressor assembly outlet temperature and be opened or closed.When environment temperature is less than threshold value (such as 32 °F), aftercooler
By-passing valve is opened.At a temperature of higher than control temperature, aftercooler by-passing valve is closed.
Aftercooler bypass valve assembly optionally includes one body swimming separator, with from outlet air flow remove liquid and
Atomized water.By forming the separator part of aftercooler bypass valve assembly, when aftercooler by-passing valve is opened and Dang Qi
When closing, separator is operable.In addition, packing separator with aftercooler bypass valve assembly simplifies design, drop
Low cost eliminates pipeline and connects and contribute to overall compact arrangement.
Description of the drawings
Specific implementation mode in detail below is read in conjunction with the accompanying drawings, will be more fully understood and understand the present invention,
In：
Fig. 1 is the stereogram of aftercooler bypath system according to the present invention；
Fig. 2 is the flow chart of aftercooler bypath system according to the present invention；And
Fig. 3 is the viewgraph of cross-section of the embodiment of by-passing valve according to the present invention.
Specific implementation mode
Referring now to the drawings, wherein identical reference numeral always shows identical component, aftercooler is seen in Fig. 1
Bypath system 10.The connector pipeline 14 that system 10 exports 16 via the second level for being fluidly interconnected to compressor 12 is interconnected to sky
Air compressor 12 so that at least part for leaving the air of compressor 12 leaves the aftercooler entrance of conventional aftercooler 20
Pipe 18 can be redirected to system 10.Connector pipeline 14 will leave the compressed air point of the outlet 16 of air compressor 12
It flow to the bypass valve assembly 22 with mixing chamber 24.Mixing chamber 24 is also interconnected to the drain flange 34 of aftercooler 20 so that from
Opening the cooling air of aftercooler 20 can mix with the hot-air shunted by connector pipeline 14.Valve module 22 further includes side
Port valve 26, by-passing valve 26 can be selectively opened or closed based on threshold value (such as ambient air temperature), or at least partly
It opens.Valve module 22 preferably includes separator 28, and separator 28 is attached on valve module 22 and is positioned adjacent to mixed
Room 24 is closed, to assist removing water from mixed air stream.Mixing air in mixing chamber 24 then can be via outlet(discharge) flange
42 are supplied to braking system, wherein outlet(discharge) flange 42 may be coupled to the main appearance for compressed air to be directed to braking system
The Routine purges pipeline of device.When by-passing valve 26 is closed, the compressed air for leaving the cooling of aftercooler 20 still passes through mixing
Room 24 so that separator 28 can remove any undesirable water, then be left to braking system via flange 42.
By-passing 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 (for example, freezing point), the predetermined outlet temperature of environment temperature is resulted in higher than.Optionally, as described below,
Ambient air temperature control valve 26 can be based on adaptively to keep mixing air temperature.In addition, as shown in Figure 1, postcooling
Device bypass valve assembly 22 can be formed as single, integrated unit, can install or replace with for being easier to pacify at the scene
Dress or the individual unit repaired.
With reference to figure 2, by-passing valve 26 selectively allows for the compressed air for leaving compressor 12 to bypass aftercooler 20, then
It is mixed with the cooling air for leaving aftercooler 20 by drain flange 34.Therefore, bypass valve assembly 22 provides aftercooler 20
Direct short bypass so that when by-passing 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 preferentially through by-passing valve 26 in mixing chamber 24.This cloth
It sets than needing to open simultaneously to another connection of aftercooler by-pass line using triple valve while blocking to the connection of aftercooler
Conventional method it is significantly more simple and cost is lower.
As shown in Figure 1, separator 28 preferably include liquid water and atomized water removed from outlet air flow it is automatic
Drain valve 30.Although drain valve 30 is shown schematically as the electricity on the bottom of the container 32 of separator 28 in fig. 2
Magnet valve, but drain valve 30 can be additionally comprise the pneumatic guiding drain valve of container bottom, wherein control solenoid is integrated
Into the block of aftercooler by-passing valve 22.The container 32 of separator 28 may include solenoid valve 30 and container bottom in valve body
The pneumatic Integral pneumatic connection being oriented between drain valve in portion so that separator container can be removed for maintenance and
Electric wire or pipeline are not interfered.
Although by-passing valve 26 can be formed using suitable two-port valve as known in the art, by-passing valve 26 can also
It is made in a manner of identical with the feather valve 64 of the cylinder head of air compressor 12, because these valves are designed in second level gas
It is reliably operated under the high temperature and high pressure of cylinder outlet.For example, as shown in figure 3, by-passing valve 26 may include with control signal
52 shell 50, the control signal 52 are used to control the valve for being located in and being biased in shell 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 in shell 50
Valve seat 58 engage, in open position, valve 52 allow ingress port 60 be connected to outlet port 62.Preferably, valve 54 and valve seat
58 form contact of the metal to metal, reliably to be operated under high moderate pressure associated with system 10.Ingress port
60 are interconnected to the second level outlet 16 of compressor 12 by connector pipeline 14, and outlet port 62 is interconnected to mixing chamber 24.
Reduced for initial manufacture using identical manufacturing process for both feather valves 64 of by-passing valve 26 and air compressor 12
Periodically remanufacture and safeguard required various parts.
Although foregoing description is begged in the environment of two state aftercooler by-passing valves 26 (that is, opening or closing)
By, but by-passing valve 26 can be optionally proportioning valve, allow to control the outlet temperature of aftercooler 20 in certain temperature
In range.For example, outlet temperature can be controlled by associated controller 36, associated controller 36 has surrounding air temperature
Degree meter 38 is comparable sensor and the temperature sensor 40 in the pipeline in 24 downstream of mixing chamber.Therefore, Mei Danghuan
When border temperature is freezing point or is below the freezing point, it can be set outlet temperature to by changing the aperture of aftercooler by-passing valve 26
100 °F so that provide required high temperature air stream to mixing chamber 24.For example, if environment temperature is higher than 32 °F, aftercooler
Bypass controller 36 will close aftercooler by-passing valve 26, and all volume of air will flow through aftercooler so that compressor
Outlet temperature is higher by 20 °F to 40 °F than environment temperature.Similarly, when temperature is less than 32 ℉, aftercooler bypass controller 36
By-passing valve 26 is opened to and is enough to maintain outlet temperature to be about 100 °F or desired any temperature.Therefore, by-passing valve 26 and control
Device 36 can be configured as provide outlet temperature closed-loop control, thus provide independently of environment temperature variable mixing ratio and can
Control outlet temperature.
Claims (19)
1. a kind of aftercooler bypath system, including：
Mixing chamber has and is suitable for the first connector with the hot compressed air communication of air compressor and is suitable for
The second connector being in fluid communication with the cooling air emission mouth of aftercooler；
By-passing valve is located between first connector and the mixing chamber, for selectively control by described the
A connector enters the amount of the hot compressed air in the mixing chamber；And
Separator is positioned adjacent to the mixing chamber.
2. system according to claim 1, wherein the separator includes drain valve.
3. system according to claim 2, wherein the drain valve is pneumatically operated.
4. system according to claim 1, further includes controller, it is operatively interconnected to the by-passing valve, the control
Device processed is arranged to operate the by-passing valve.
5. system according to claim 4, wherein the controller is set as dropping to predetermined threshold when ambient air temperature
Value opens the by-passing valve when following.
6. system according to claim 4 further includes the ambient air temperature meter being electrically interconnected with the controller.
7. system according to claim 5 further includes the temperature sensor for being located in the mixing chamber downstream.
8. system according to claim 6, wherein the controller is set as, when the ambient air temperature is less than predetermined
When threshold value, the by-passing valve is operated so that the air in the mixing chamber downstream is maintained at predetermined temperature.
9. a kind of system for preventing the ice in compressor discharge pipeline from gathering, the system comprises：
Air compressor is exported with hot compressed air；
Aftercooler is fluidly interconnected to the hot compressed air and exports and have cooling air emission mouth；
Conduit is fluidly interconnected with hot compressed air outlet；
By-passing valve has the input port for being fluidly interconnected to the hot compressed air outlet and outlet；
Mixing chamber is fluidly interconnected to the outlet of the by-passing valve and the cooling air emission mouth, and with outlet
Flange；And
Separator is positioned adjacent to the mixing chamber.
10. system according to claim 9, wherein the separator includes drain valve.
11. system according to claim 10, wherein the drain valve is pneumatically operated.
12. system according to claim 11 further includes the controller for being operatively interconnected to the by-passing valve, the control
Device processed is set as operating the by-passing valve.
13. system according to claim 12, wherein the controller be set as when ambient air temperature drop to it is predetermined
The by-passing valve is opened when below threshold value.
14. system according to claim 12 further includes the ambient air temperature meter being electrically interconnected with the controller.
15. system according to claim 14 further includes the temperature sensor for being located in the mixing chamber downstream.
16. system according to claim 15, wherein the controller is set as, when ambient air temperature is less than predetermined threshold
The by-passing valve is operated when value so that the air in the mixing chamber downstream is maintained at predetermined temperature.
17. a kind of method that anti-stagnant ice gathers in compressor discharge pipeline, the described method comprises the following steps：
Make the part shunting for any hot compressed gas for leaving air compressor far from aftercooler；
Any remainder of hot compressed gas is allowed to be cooled down by the aftercooler；
Mixing chamber is provided, the compressed gas for leaving the cooling of the aftercooler wherein can be with the institute of hot compressed gas
It states shunting part to mix, be then departed to the compressor discharge pipeline；
Measure the amount of the hot compressed gas for the shunting for being allowed to enter the mixing chamber to be mixed with the compressed gas of the cooling；
With
Before the gas exits into the compressor discharge pipeline any water is detached from the mixed gas.
18. according to the method for claim 17, wherein metering is allowed to enter the mixing chamber with the pressure with the cooling
The step of 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. according to the method for claim 18, wherein metering is allowed to enter the mixing chamber with the pressure with the cooling
The step of amount of the hot compressed gas of the shunting of contracting gas mixing further includes based on any in the compressor discharge pipeline
The temperature of air, come adjust shunting hot compressed gas amount.
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 CN106460819A (en) | 2017-02-22 |
| CN106460819B true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3071255C (en) * | 2017-08-15 | 2020-09-01 | New York Air Brake Llc | Deicing 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 |
Family Cites Families (7)
| 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 |
| US5927399A (en) * | 1997-04-15 | 1999-07-27 | Westinghouse Air Brake Company | 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 |
| JP3816289B2 (en) * | 2000-02-18 | 2006-08-30 | ナブテスコ株式会社 | Hollow fiber membrane dehumidifier |
| TWI397483B (en) * | 2010-01-26 | 2013-06-01 | Nabtesco Corp | Air compression apparatus for railroad vehicle |
| 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 CN CN201480079914.XA patent/CN106460819B/en not_active Expired - Fee Related
- 2014-06-17 WO PCT/US2014/042672 patent/WO2015195092A1/en active Application Filing
- 2014-06-17 CA CA2950691A patent/CA2950691C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2950691A1 (en) | 2015-12-23 |
| CA2950691C (en) | 2017-03-07 |
| WO2015195092A1 (en) | 2015-12-23 |
| CN106460819A (en) | 2017-02-22 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 Termination date: 20200617 |