CN207114503U - Supercharged diesel engine air inlet oxygen concentration testing depressurized system - Google Patents
Supercharged diesel engine air inlet oxygen concentration testing depressurized system Download PDFInfo
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- CN207114503U CN207114503U CN201720768143.6U CN201720768143U CN207114503U CN 207114503 U CN207114503 U CN 207114503U CN 201720768143 U CN201720768143 U CN 201720768143U CN 207114503 U CN207114503 U CN 207114503U
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Abstract
A kind of supercharged diesel engine air inlet oxygen concentration testing depressurized system, including：Scavenging collector, three sample detecting pipelines, three sampled points are taken along wall axial direction, oxygen concentration takes the average value of three sampled point measurement data, gas sampling branch pipe gos deep into scavenging collector 100mm, gas enters y-type filter by cut-out magnetic valve, gas pressure is down to oxygen concentration sensor working range after into pressure-reducing valve, by three-way pipe, a part of gas is bypassed by needle-valve, another part gas enters sampler chamber oxygen supply concentration sensor measurement, enters air after then passing sequentially through mass air flow sensor and gas sampling outlet stool.The utility model can accurately measure the gas oxygen concentration in scavenging collector, avoid the measurement error that the inhomogeneities of oxygen concentration in scavenging collector is brought；Sampling branch pipe stretches into the segment distance of scavenging collector one in addition, and velocity field caused by avoiding gas wall boundary layer flow is uneven.
Description
Technical field
It the utility model is related to diesel engine, and in particular to a kind of supercharged diesel engine air inlet oxygen concentration testing depressurized system.
Background technology
Two-stroke low speed diesel engine peculiar to vessel employs constant pressure turbo-charging system, and pressurized air enters level pressure unit scavenging
Cylinder is entered by each scavenging air box branch pipe after collector, in order to reduce the fluctuation of scavenging pressure, the volume of scavenging collector is very huge
Greatly.After EGR Technology, waste gas and fresh air be mixed be reallocated to each cylinder into scavenging collector, it is necessary to
Oxygen concentration when measurement engine operates in different operating modes in real time in scavenging collector is used for control targe signal.Scavenging collector is to open
Port system, pressure limit is in 1~5bar (absolute pressure), and temperature range is at 20~50 DEG C, and conventional zirconia-type oxygen concentration
The measurement media operation scope of sensor is 1~1.1bar, a kind of temperature range -20~600 DEG C, it is therefore desirable to gas decompression system
System.
Utility model content
The purpose of this utility model is that the oxygen concentration testing for marine low speed diesel engine scavenging collector provides a kind of supercharging
Diesel engine intake oxygen concentration testing depressurized system, the system can accurately control the pressure and flow of sampler chamber gas, pass through oxygen
Concentration sensor measurement sample gas obtains accurate oxygen concentration signal.
To achieve the above object, technical solution of the present utility model is as follows：
A kind of supercharged diesel engine air inlet oxygen concentration testing depressurized system, including scavenging collector, feature are that it forms bag
Include：
Three sampled points are set along wall axis direction upper, middle and lower in described scavenging collector, the first sampling is set respectively
Branch pipe, the second sampling branch pipe and the 3rd sampling branch pipe；
The entrance of first sampling branch pipe stretches into described scavenging collector, is along what the outlet of the first sampling branch pipe was sequentially connected
Air branch pipe, first subtract before air branch pipe, the first y-type filter, the first pressure-reducing valve before first cut-out magnetic valve, first filter
Air branch pipe, the first three-way connection arrival end, the first exit end of the first three-way connection, the first pin after pressure valve, the first pressure-reducing valve
Air branch pipe, the first needle-valve and first gas bypass branch pipe before valve, the second outlet end of the first described three-way connection connects successively
What is connect is air after air branch pipe, the entrance of the first sampler chamber, the outlet of the first sampler chamber, the first sampler chamber before the first sampler chamber
Branch pipe, the first mass air flow sensor and the first sample outlet branch pipe, the outlet of the first sample outlet branch pipe directly connect air, and first
Oxygen concentration sensor is connected with the first described sampler chamber, forms the first sample detecting pipeline；
The entrance of second sampling branch pipe stretches into described scavenging collector, is along what the outlet of the second sampling branch pipe was sequentially connected
Air branch pipe, second subtract before air branch pipe, the second y-type filter, the second pressure-reducing valve before second cut-out magnetic valve, the second filter
Air branch pipe, the second three-way connection arrival end, the second three-way connection first exit end, the second needle-valve after pressure valve, the second pressure-reducing valve
Preceding air branch pipe, the second needle-valve and second gas bypass branch pipe are directly connected to air, the second described three-way connection second outlet
Hold be sequentially connected be air branch pipe before the second sampler chamber, the second sampling chamber inlet, the outlet of the second sampler chamber, the second sampler chamber after
Air branch, the second mass air flow sensor and the second sample outlet branch pipe, the outlet connection air of the sample outlet branch pipe, the second oxygen are dense
Degree sensor is connected with the second described sampler chamber, forms the second sample detecting pipeline；
The entrance of 3rd sampling branch pipe stretches into described scavenging collector, is along what the outlet of the 3rd sampling branch pipe was sequentially connected
Air branch pipe, the 3rd subtract before air branch pipe, the 3rd y-type filter, the 3rd pressure-reducing valve before 3rd cut-out magnetic valve, the 3rd filter
Air branch pipe, the 3rd three-way connection arrival end, the first exit end of the 3rd three-way connection, the 3rd pin after pressure valve, the 3rd pressure-reducing valve
Air branch pipe, the 3rd needle-valve connect air, the 3rd described three-way connection second outlet end with third gas bypass branch pipe before valve
What is be sequentially connected is empty after air branch pipe before the 3rd sampler chamber, the 3rd sampling chamber inlet, the outlet of the 3rd sampler chamber, the 3rd sampler chamber
Gas branch, the 3rd mass air flow sensor and the 3rd sample outlet branch pipe, the outlet connection air of the 3rd sample outlet branch pipe, the 3rd oxygen
Concentration sensor is connected with the 3rd described sampler chamber (48), forms the 3rd sample detecting pipeline.
The entrance of first, second, third described sampling branch pipe stretches into 100mm in described scavenging collector.
The setting pressure of first, second, third described pressure-reducing valve is not more than 1.07bar, the maximum gauge of sample lines
No more than 10mm.
The beneficial effects of the utility model are：
1st, rational sampled point setting, scavenging collector set three sampled points, oxygen concentration output along wall axis direction
Value takes being averaged for three measured values, avoids the measurement error that the inhomogeneities of oxygen concentration in scavenging collector is brought；Sampling in addition
Branch pipe stretches into the segment distance of scavenging collector one, and velocity field caused by avoiding gas wall boundary layer flow is uneven.
2nd, sample lines can individually be cut off, when main frame switches to non-waste gas recirculation mode by waste gas recirculation mode,
Oxygen concentration testing need not be now carried out again, and three groups of sample lines can sample by cutting off closed electromagnetic valve.
3rd, accuracy of measurement is high.High-precision pressure-reducing valve is employed, after setup pressure value so that the gas pressure of sampler chamber
Fluctuated in minimum scope, meet lambda sensor pressure measxurement demand；Adjusted by gas flow monitoring and needle-valve, make to adopt
The gas flow of specimen chamber is in stable measurement range.
4th, small, the sample lines diameter very little of actual design, no more than 10mm, the stream of sample gas is influenceed on host performance
Amount will not cause being decreased obviously for scavenging pressure and influence host performance.
5th, malfunction monitoring, due to setting three groups of sample lines, when the measurement result of some sample lines and other two
When pipeline compares obvious abnormal, judge the pipeline data exception, take the average value of other two groups of measured values as final output knot
Fruit, while carry out fault alarm.
Brief description of the drawings
Fig. 1 is system connection figure of the present utility model.
Fig. 2 is the air flow schematic diagram of the utility model scavenging collector.
1 scavenging collector (or pumping main), 2 first sampling branch pipes, 3 first cut-out magnetic valves, air before 4 first filters
Branch pipe, 5 first y-type filters, air branch pipe before 6 first pressure-reducing valves, 7 first pressure-reducing valves, air branch pipe after 8 first pressure-reducing valves, 9
First three-way connection, air branch pipe before 10 first needle-valves, 11 first needle-valves, 12 first gas bypass branch pipe, 13 first sampler chambers
Preceding air branch pipe, 14 first sampler chambers, 15 first oxygen concentration sensors (zirconia-type), air branch pipe after 16 first sampler chambers,
17 first mass air flow sensor, 18 first gas sample outlet branch pipes, 19 second sampling branch pipes, 20 second cut-out magnetic valves, 21 the
Air branch pipe before tow filtrator, 22 second y-type filters, air branch pipe before 23 second pressure-reducing valves, 24 second pressure-reducing valves, 25 second
Air branch pipe after pressure-reducing valve, 26 second three-way connections, air branch pipe before 27 second needle-valves, 28 second needle-valves, by 29 second gas
Logical branch pipe, air branch pipe before 30 second sampler chambers, 31 second sampler chambers, 32 second oxygen concentration sensors (zirconia-type), 33 the
Air branch pipe after two sampler chambers, 34 second mass air flow sensor, 35 second gas sample outlet branch pipes, 36 the 3rd sampling branch pipes, 37
3rd cut-out magnetic valve, air branch pipe before 38 the 3rd filters, 39 the 3rd y-type filters, air branch pipe before 40 the 3rd pressure-reducing valves,
41 the 3rd pressure-reducing valves, air branch pipe after 42 the 3rd pressure-reducing valves, 43 the 3rd three-way connections, air branch pipe before 44 the 3rd needle-valves, 45
Three needle-valves, 46 third gas bypass branch pipe, air branch pipe before 47 the 3rd sampler chambers, 48 the 3rd sampler chambers, 49 the 3rd oxygen concentrations pass
Sensor (zirconia-type), air branch pipe after 50 the 3rd sampler chambers, 51 the 3rd mass air flow sensor, 52 third gas sample outlet branch
Pipe.
Embodiment
The utility model is further elaborated with reference to the accompanying drawings and examples, but this practicality can not be limited with this
New protection domain.
Fig. 1 and Fig. 2 are please referred to, as seen from the figure, the decompression of the utility model supercharged diesel engine air inlet oxygen concentration testing
System, including scavenging collector 1, its composition include：
Three sampled points are set along wall axis direction upper, middle and lower in described scavenging collector 1, set first to adopt respectively
Sample branch pipe 2, second samples branch pipe 19 and the 3rd and samples branch pipe 36,
The entrance of first sampling branch pipe 2 stretches into described scavenging collector 1, is sequentially connected along the outlet of the first sampling branch pipe 2
Be air branch pipe before air branch pipe 4, the first y-type filter 5, the first pressure-reducing valve before the first cut-out magnetic valve 3, first filter
6th, air branch pipe 8, the arrival end of the first three-way connection 9, the first of the first three-way connection 9 go out after the first pressure-reducing valve 7, the first pressure-reducing valve
Air branch pipe 10, the first needle-valve 11 and first gas bypass branch pipe 12, the first described three-way connection 9 before mouth end, the first needle-valve
Second outlet end air branch pipe 13, the entrance of the first sampler chamber 14, the first sampler chamber before being the first sampler chamber that are sequentially connected
Outlet, air branch pipe 16, the first mass air flow sensor 17 and the first sample outlet branch pipe 18 after the first sampler chamber, first sampling
The outlet connection air of outlet stool 18, the first oxygen concentration sensor 15 are connected with the first described sampler chamber 14, form first
Sample detecting pipeline；
The entrance of second sampling branch pipe 19 stretches into described scavenging collector 1, and the outlet along the second sampling branch pipe 19 connects successively
What is connect is empty before air branch pipe 21, the second y-type filter 22, the second pressure-reducing valve before the second cut-out magnetic valve 20, the second filter
Air branch pipe 25, the arrival end of the second three-way connection 26, the two or three connect after gas branch pipe 23, the second pressure-reducing valve 24, the second pressure-reducing valve
Air branch pipe 27, the second needle-valve 28 and second gas bypass branch pipe 29 connect air before head first exit end, the second needle-valve, described
The second three-way connection second outlet end be sequentially connected be air branch pipe 30 before the second sampler chamber, the entrance of the second sampler chamber 31,
Second sampler chamber 31 exports, air props up the 33, second mass air flow sensor 34 and the second sample outlet branch pipe 35 after the second sampler chamber, should
The outlet connection air of sample outlet branch pipe 35, the second oxygen concentration sensor 32 are connected with the second described sampler chamber 31, formed
Second sample detecting pipeline；
The entrance of 3rd sampling branch pipe 36 stretches into described scavenging collector 1, and the outlet along the 3rd sampling branch pipe 36 connects successively
Connect is the 3rd cut-out magnetic valve 37, empty before air branch pipe 38, the 3rd y-type filter 39, the 3rd pressure-reducing valve before the 3rd filter
Air branch pipe 42, the arrival end of the 3rd three-way connection 43, the three or three connect after gas branch pipe 40, the 3rd pressure-reducing valve 41, the 3rd pressure-reducing valve
Air branch pipe 44, the 3rd needle-valve 45 and third gas bypass branch pipe 46 connect air before first 43 first exit end, the 3rd needle-valve,
Air branch pipe 47, the 3rd sampler chamber 48 before being the 3rd sampler chamber that the described second outlet end of the 3rd three-way connection 43 is sequentially connected
Entrance, the 3rd sampler chamber 48 export, air props up the 50, the 3rd mass air flow sensor 51 and the 3rd sample outlet branch pipe after the 3rd sampler chamber
52, the outlet of the 3rd sample outlet branch pipe 52 connects air, the 3rd oxygen concentration sensor 49 and the 3rd described sampler chamber 48
It is connected, forms the 3rd sample detecting pipeline.
The entrance of first, second, third described sampling branch pipe stretches into 100mm in described scavenging collector.
The setting pressure of first, second, third described pressure-reducing valve is not more than 1.07bar, the maximum gauge of sample lines
No more than 10mm.
Supercharged diesel engine air inlet oxygen concentration testing depressurized system, is installed on marine diesel, and scavenging collector 1 is D types
Structure, bottom are multichannel air inlet, and side exit is connected with main frame scavenging air box, and export volume depends on in cylinder number.When
When system enters measurement pattern, three sample lines start simultaneously at work.
The regulative mode and operation principle of first sample detecting pipeline are as follows：First cut-out magnetic valve 3 is opened, scavenging collector
In gases at high pressure from first sampling branch pipe 2 through first cut-out magnetic valve 3 and first filter before air branch pipe 4 enter the first Y
Type filter 5, water and oil in gas through air branch pipe 6 before the first pressure-reducing valve enter the first pressure-reducing valve 7 after being filtered, regulation the
The setup pressure value of one pressure-reducing valve 7, air branch pipe 8 enters the first three-way connection 9 after the first pressure-reducing valve after gas decompression, now
Gas distribution is two parts, and a part of gas enters the first needle-valve 11, the first air stream by air branch pipe 10 before the first needle-valve
The monitoring flow of gauge 17 adjusts the aperture of the first needle-valve 11, and gas bypasses branch pipe 12 by first gas and is discharged into air；It is another
Portion gas pass through the first sampler chamber before air branch pipe 13 enter the first sampler chamber 14, now the pressure of the first sampler chamber gas and
Flow is controlled in zone of reasonableness, and the gas in sampler chamber is measured by the first oxygen concentration sensor 15, samples gas
Body is discharged into air after passing sequentially through the first mass air flow sensor 17 and first gas sample outlet branch pipe 18.
The regulative mode and operation principle of second sample lines and the 3rd sample lines are identical with the first sample lines.
The protection domain of the requires of the utility model is not limited only to above-described embodiment, and one of ordinary skill in the art is come
Say, it is made any modification, equivalent substitution, apparent in the case where not departing from principle of the present utility model and spirit
Variations and modifications, the scope of protection of the utility model all should be belonged to.
Claims (3)
1. a kind of supercharged diesel engine air inlet oxygen concentration testing depressurized system, including scavenging collector (1), it is characterised by that it forms bag
Include：
Three sampled points are set along wall axis direction upper, middle and lower in described scavenging collector (1), the first sampling is set respectively
Branch pipe (2), the second sampling branch pipe (19) and the 3rd sampling branch pipe (36),
The entrance of first sampling branch pipe (2) stretches into described scavenging collector (1), and the outlet along the first sampling branch pipe (2) connects successively
What is connect is before the first cut-out magnetic valve (3), first filter before air branch pipe (4), the first y-type filter (5), the first pressure-reducing valve
Air branch pipe (8), the first three-way connection (9) arrival end, first after air branch pipe (6), the first pressure-reducing valve (7), the first pressure-reducing valve
Air branch pipe (10), the first needle-valve (11) and first gas bypass branch pipe before the first exit end of three-way connection (9), the first needle-valve
(12) what, the second outlet end of described the first three-way connection (9) was sequentially connected is air branch pipe (13), before the first sampler chamber
Air branch pipe (16), the first mass air flow sensor after the outlet of the entrance, the first sampler chamber of one sampler chamber (14), the first sampler chamber
(17) passed with the first sample outlet branch pipe (18), the outlet connection air of the first sample outlet branch pipe (18), the first oxygen concentration
Sensor (15) is connected with described the first sampler chamber (14), forms the first sample detecting pipeline；
The entrance of second sampling branch pipe (19) stretches into described scavenging collector (1), along the outlet of the second sampling branch pipe (19) successively
Connection be air branch pipe (21) before the second cut-out magnetic valve (20), the second filter, the second y-type filter (22), second subtract
Air branch pipe (25), the second three-way connection (26) enter after air branch pipe (23), the second pressure-reducing valve (24), the second pressure-reducing valve before pressure valve
Air branch pipe (27), the second needle-valve (28) and second gas bypass before mouth end, the second three-way connection first exit end, the second needle-valve
Branch pipe (29) connects air, the air branch pipe before being the second sampler chamber that the second described three-way connection second outlet end is sequentially connected
(30), air branch (33), the second air stream after the second sampler chamber (31) entrance, the second sampler chamber (31) outlet, the second sampler chamber
Gauge (34) and the second sample outlet branch pipe (35), the outlet connection air of the sample outlet branch pipe (35), the second oxygen concentration pass
Sensor (32) is connected with described the second sampler chamber (31), forms the second sample detecting pipeline；
The entrance of 3rd sampling branch pipe (36) stretches into described scavenging collector (1), along the outlet of the 3rd sampling branch pipe (36) successively
Connection be the 3rd cut-out magnetic valve (37), air branch pipe (38), the 3rd y-type filter (39), the 3rd subtract before the 3rd filter
Air branch pipe (42), the 3rd three-way connection (43) enter after air branch pipe (40), the 3rd pressure-reducing valve (41), the 3rd pressure-reducing valve before pressure valve
Air branch pipe (44), the 3rd needle-valve (45) and the 3rd gas before mouth end, the first exit end of the 3rd three-way connection (43), the 3rd needle-valve
Body bypass branch pipe (46) connection air, what the 3rd described three-way connection (43) second outlet end was sequentially connected is the 3rd sampler chamber
Preceding air branch pipe (47), the 3rd sampler chamber (48) entrance, the outlet of the 3rd sampler chamber (48), air branch (50) after the 3rd sampler chamber,
3rd mass air flow sensor (51) and the 3rd sample outlet branch pipe (52), the outlet connection of the 3rd sample outlet branch pipe (52) are big
Gas, the 3rd oxygen concentration sensor (49) are connected with the 3rd described sampler chamber (48), form the 3rd sample detecting pipeline.
2. supercharged diesel engine air inlet oxygen concentration testing depressurized system according to claim 1, it is characterised in that described
The entrance of first, second, third sampling branch pipe stretches into 100mm in described scavenging collector.
3. supercharged diesel engine air inlet oxygen concentration testing depressurized system according to claim 1, it is characterised in that described
The setting pressure of first, second, third pressure-reducing valve is not more than 1.07bar, and the maximum gauge of sample lines is no more than 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720768143.6U CN207114503U (en) | 2017-06-28 | 2017-06-28 | Supercharged diesel engine air inlet oxygen concentration testing depressurized system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720768143.6U CN207114503U (en) | 2017-06-28 | 2017-06-28 | Supercharged diesel engine air inlet oxygen concentration testing depressurized system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207114503U true CN207114503U (en) | 2018-03-16 |
Family
ID=61591380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720768143.6U Active CN207114503U (en) | 2017-06-28 | 2017-06-28 | Supercharged diesel engine air inlet oxygen concentration testing depressurized system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207114503U (en) |
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2017
- 2017-06-28 CN CN201720768143.6U patent/CN207114503U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181128 Address after: Room 408, No. 1, 600 Xinyuan South Road, Lingang New Town, Pudong New Area, Shanghai, 2003 Patentee after: CSSC POWER RESEARCH INSTITUTE CO., LTD. Address before: 200129 346 Pudong Avenue, Pudong New Area, Shanghai, 2851 Patentee before: Hudong Heavy Mechine Co., Ltd. |
|
| TR01 | Transfer of patent right |