CN204575390U - Constant volume combustion bomb products of combustion acquisition system - Google Patents
Constant volume combustion bomb products of combustion acquisition system Download PDFInfo
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- CN204575390U CN204575390U CN201520180552.5U CN201520180552U CN204575390U CN 204575390 U CN204575390 U CN 204575390U CN 201520180552 U CN201520180552 U CN 201520180552U CN 204575390 U CN204575390 U CN 204575390U
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Abstract
The utility model relates to a kind of constant volume combustion bomb products of combustion acquisition system.Object is the deficiency that shortcoming in order to overcome single cylinder engine total cylinder sampling system solves traditional gas harvester simultaneously.Constant volume combustion bomb products of combustion acquisition system, comprising: constant volume combustion bomb; To quench breath device; First solenoid valve; First flow metering valve; Second solenoid valve; Second flow metering valve; 3rd solenoid valve; 3rd flow metering valve; Airbag or gas cylinder; Nitrogen cylinder; Channels Synchronous Data Acquisition System; Single-chip computer control system; The utility model has the following advantages and beneficial effect: constant volume combustion bomb can accurately control multiple thermodynamic parameter, can burning under the various condition of accurate recreation, thus the cyclical variations eliminating real engine are on the impact of sampling.
Description
Technical field:
The utility model relates to a kind of constant volume combustion bomb device, is specifically related to a kind of constant volume combustion bomb products of combustion acquisition system.
Background technology:
Along with Abgasgesetz is increasingly strict, people more and more pay close attention to the discharge how effectively reducing engine harmful gas, research noxious emission as PM in in-cylinder combustion process be how to be formed its discharge of reduction significant.Existingly in current research adopt single cylinder engine total cylinder sampling system, but this system architecture is complicated, the construction cycle is long, cost is high, work time cyclical variations large.Be widely used in the research of simulated engine because constant volume combustion bomb can accurately control multiple thermodynamic parameter, but research work mostly concentrates on combustion field, collect constant volume combustion bomb products of combustion, the research work analyzing harmful gas formation is also less.
Mostly harvester at present for gas is sampling bottle or sampler bag, uses drawing-in type method, namely sampling bottle or sampler bag is vacuumized before sampling, utilize pressure reduction to be taken out by gas.There is following defect in the collection that this device is used for constant volume combustion bomb products of combustion: cannot sample completely, and constant volume combustion bomb pressure that is final and sampling bottle reaches balance, and residual gas cannot take out; During sampling, products of combustion is in the process of sampling pipe, because the amount of the composition in the very high products of combustion of temperature and each composition can change, the final gas taken out with want that the gas difference gathered is very large; Accurately cannot control the moment gathered, in constant volume combustion bomb, to proceed to not the amount of composition of combustion Product and each composition in the same time all different in burning, and traditional gas harvester is difficult to collect not gas in the same time.
Summary of the invention:
For the shortcoming overcoming single cylinder engine total cylinder sampling system solves the deficiency of traditional gas harvester simultaneously, the utility model provides a kind of constant volume combustion bomb products of combustion harvester and method.Concrete technical scheme is as follows:
Constant volume combustion bomb products of combustion acquisition system, comprising:
Constant volume combustion bomb 35, for analog fuel burning, comprises air inlet system and exhaust system, heating system, fuel feed system; The products of combustion of constant volume combustion bomb, under the ordering about of high pressure nitrogen, successively through the second solenoid valve, the second flow metering valve, enters the combustion product inlet of breath device of quenching;
To quench breath device 36; Described breath device of quenching comprises: nitrogen jet current pipe 1 and dilution mixture chamber 3; Described nitrogen jet current pipe comprises successively along flow of nitrogen gas direction: compressed nitrogen entrance 4, taper taper 5 and fluerics 6; Described fluerics external sheath pre-confounding 13, and pre-confounding left end is connected with the nitrogen jet current seal of tube, and pre-confounding tube wall has combustion product inlet 19;
First solenoid valve 31, first flow metering valve 39, the two is arranged on nitrogen cylinder and quenches between breath device;
Second solenoid valve 32 is high-temperature solenoid valve; Second flow metering valve 40; The two is arranged on constant volume combustion bomb and quenches between breath device;
3rd solenoid valve 33 is high-pressure solenoid valve; 3rd flow metering valve 41; The two is arranged between nitrogen cylinder and constant volume combustion bomb;
Airbag or gas cylinder 37, collect the product that breath device of quenching finally is got rid of;
Nitrogen cylinder 38, stores liquid nitrogen; The nitrogen that nitrogen cylinder exports is divided into two tunnels; One tunnel through the 3rd solenoid valve, the 3rd flow metering valve, enters constant volume combustion bomb successively; Another road, successively through the first solenoid valve, first flow metering valve, enters the compressed nitrogen entrance of breath device of quenching;
Channels Synchronous Data Acquisition System 42;
Single-chip computer control system 34; Described single-chip computer control system is made up of single-chip microcomputer, driver and signal feedback system, and wherein signal feedback system comprises cylinder pressure sensor and A/D analog-digital commutator; Described cylinder pressure sensor is for measuring the pressure signal of described constant volume combustion bomb and being transferred to described A/D analog to digital converter; Described A/D analog to digital converter is used for pressure signal being converted into digital signal and being transferred to described single-chip microcomputer; Described single-chip microcomputer for analyzing digital signal, and by described driver control solenoid valve.
Channels Synchronous Data Acquisition System and single-chip computer control system Controlling solenoid valve action moment.
Products of combustion out to enter to quench breath device through the pipeline of the second flow metering valve and the second solenoid control from constant volume combustion bomb; Nitrogen out enters through the pipeline of first flow metering valve and the first solenoid control breath device of quenching from nitrogen cylinder, products of combustion and nitrogen fully mix together with after breath of quenching from quench breath device outlet flow to airbag or gas cylinder through pipeline; A road is also had to be flow to constant volume combustion bomb through the pipeline of the second flow metering valve and the second solenoid control from nitrogen cylinder nitrogen out.
Described breath device of quenching is one of the utility model important composition parts, the nitrogen that temperature is out lower from nitrogen cylinder and the high-temperature combustion product collected fully mix quenching in breath device, the concentration of nitrogen significantly dilute combustion product while the temperature reducing products of combustion, add the chemical activity of nitrogen own very low, ongoing various reaction in products of combustion can be stopped rapidly, ensure that the amount of the composition of products of combustion and each composition is constant.
Preferably, described in quench breath device, comprising: nitrogen jet current pipe 1, liquid nitrogen locker room 2 and dilution mixture chamber 3 three part;
Described nitrogen jet current pipe comprises along flow of nitrogen gas direction: compressed nitrogen entrance 4, taper taper 5 and fluerics 6; Described fluerics comprises: breeze way 7 and one section of contraction section 8 and nitrogen outlet pressure-stabilizing section 9; Breeze way has 4 the liquid nitrogen inlet holes 10 being communicated with fluerics and liquid nitrogen locker room, hole diameter is 1/5th of breeze way caliber herein, and this parameter can better aspirated liquid nitrogen vapor; Pressure-stabilizing section has 12 products of combustion inlet holes, products of combustion inlet hole diameter is identical with liquid nitrogen inlet hole diameter.
Described dilution mixture chamber comprises: pre-confounding 13, retract chamber 14, one-level mixing chamber 15, diffuser casing 16 and secondary mixing chamber 17; It is outer that pre-confounding 13 is coated on fluerics 6, and its left end is connected with the nitrogen jet current seal of tube, and pre-confounding tube wall has combustion product inlet 19; One-level mixing chamber 15 is connected with retract chamber 14, and the length of mixing chamber is 2 times of diameter.
The external part of described retract chamber ending segment and jet pipe is at same facade, and the right-hand member diameter of retract chamber is 2 times of nitrogen jet current pipe port diameter herein; All apply polytetrafluorethylecoatings coatings in the pipeline of device, reduce the suction-operated to products of combustion.
Nitrogen jet current pipe and dilution mixture chamber are tightly connected by screw thread 21,22; Described liquid nitrogen storage room is arranged on nitrogen jet current pipe by screw thread 23, and is sealed by phenyl tetrafluoride pad and dilution mixture chamber.
The constant volume combustion bomb products of combustion acquisition method that above-mentioned acquisition system realizes, comprises the steps:
(1) preliminary work:
The operating condition of test condition I (certain temperature, back pressure and different fuel injectors etc.) that will study is set by constant volume combustion bomb heating system, gas handling system etc., first (solenoid valve 1 of not sampling, high-temperature solenoid valve 2, high-pressure solenoid valve 3 is not all opened), constant volume combustion bomb is allowed to burn once, Channels Synchronous Data Acquisition System normally works, obtain holding the change curve of the t in time of pressure P in bullet, Changing Pattern according to holding pressure in bullet determines timing of combustion A and terminal C, and the time of their correspondences is t respectively
1and t
2, getting the corresponding time of any point B, B point between A point and C point is t
i;
Before sampling, ensure that the first solenoid valve, the second solenoid valve, the 3rd solenoid valve and nitrogen cylinder are not all opened, vacuumized by whole system device with vacuum pump, in elimination pipeline, residual gas is on the impact of sample gas;
(2) sampling process:
Again set same operating condition of test condition I, open nitrogen cylinder;
Single-chip computer control system is utilized to control the first solenoid valve at t
1moment opens, and before collection products of combustion, nitrogen is filled with in breath device of quenching, and ensures it is the environment of low temperature and low pressure when products of combustion enters and quenches breath device, and sample gas is quenched rapidly breath;
At t
imoment single-chip computer control system controls the second solenoid valve and opens, and starts to sample to products of combustion, t
imoment meets according to testing requirements: t
1< t
i≤ t
2;
T
2moment burning terminates, and along with sampling continues to carry out, in constant volume combustion bomb, pressure declines rapidly, at t
2+ Δ t single-chip computer control system controls the 3rd solenoid valve and opens, and utilizing nitrogen to carry out scavenging to remaining in the products of combustion held in bullet, making it all to enter airbag or gas cylinder, thus realizing sampling completely; The concrete testing requirements of selection gist of Δ t and condition (holding the volume etc. holding pressure, airbag or gas cylinder in bullet after playing volume, burning);
Scavenging continues t
0after time, ensure that sample gas is taken out completely, single-chip computer control system controls the first solenoid valve, the second solenoid valve, the 3rd closed electromagnetic valve, and turn off nitrogen cylinder, sampling process terminates;
The ratio of nitrogen dilution products of combustion can be recorded by first, second, third flow metering valve.
Preferably, breath process of quenching described in is as follows:
In device, be filled with nitrogen, the oxygen in emptying device, device is in the environment of nitrogen always; The nitrogen rate of outflow is improved in taper taper, realizes one-level and accelerates; The one section slow contraction section of nitrogen after breeze way and pressure-stabilizing section, when not affecting jet exit and forming vacuum, realize nitrogen secondary and accelerate;
After nitrogen a period of time, inject liquid nitrogen to liquid nitrogen locker room; Liquid nitrogen in liquid nitrogen storage room can be entered in nitrogen jet current pipe by liquid nitrogen inlet hole and mix with compressed nitrogen, and liquid nitrogen vaporization can take away amount of heat;
Products of combustion enters pre-confounding by combustion product inlet; Negative pressuren zone in nitrogen jet current pipe is introduced high-temperature fuel gas in nitrogen jet current pipe;
The gas being positioned at nitrogen jet current pipe be full of at a high speed, the inert nitrogen of low pressure, the products of combustion flowing into pre-confounding from high-temperature fuel gas pipeline to be entered in jet pipe by products of combustion inlet hole according to a pressure reduction part and mixes with high speed nitrogen.
The utility model has the following advantages and beneficial effect:
(1) constant volume combustion bomb can accurately control multiple thermodynamic parameter, can burning under the various condition of accurate recreation, thus the cyclical variations eliminating real engine are on the impact of sampling.
(2) sampling completely of high-temperature combustion product can be realized.
(3) in a preferred approach, breath high-temperature combustion product of quenching while sampling, ensures that the gas componant of sampling and the amount of each composition remain unchanged.
(4) Channels Synchronous Data Acquisition System and single-chip computer control system is adopted can accurately to control the gas collecting moment, great changes will take place in time for the composition of high-temperature combustion product and the amount of each composition, analyzes its composition instead can push away its reaction mechanism mechanism of reaction by gathering not products of combustion in the same time.
Accompanying drawing illustrates:
Fig. 1 is system of the present utility model composition schematic diagram, and in figure, 31 represent the first solenoid valve, 32 represent the second solenoid valve, and 33 represent the 3rd solenoid valve, and 34 represent single-chip computer control system, 35 represent constant volume combustion bomb, 36 represent breath device of quenching, and 37 represent airbag or gas cylinder, and 38 represent nitrogen cylinder, 39 represent first flow metering valve, 40 represent the second flow metering valve, and 41 represent the 3rd flow metering valve, and 42 represent Channels Synchronous Data Acquisition System.
Fig. 2 is the schematic diagram of single-chip computer control system.
Fig. 3 is constant volume combustion bomb that in embodiment, Channels Synchronous Data Acquisition System obtains at the change curve of a certain working condition downforce P t in time.
Fig. 4 is 1/4 diagrammatic cross-section of breath apparatus structure of quenching in the utility model embodiment; In figure, 1 represents nitrogen jet current pipe, and 2 represent liquid nitrogen locker room, and 3 represent dilution mixture chamber.
Fig. 5 is the complete section schematic diagram that in the utility model embodiment, compressed nitrogen jet pipe amplifies; In figure, 4 represent nitrogen inlet, 5 represent taper taper, and 6 represent fluerics, 7 breeze ways representing fluerics, the 8 slow contraction sections representing fluerics, 9 pressure-stabilizing sections representing fluerics, 10 represent liquid nitrogen inlet hole, and 11 represent combustion tail gas inlet hole, 21 representatives are positioned at the external thread of nitrogen jet current pipe and junction, dilution mixture chamber, and 23 representatives are positioned at the external thread of nitrogen jet current pipe and junction, liquid nitrogen locker room.
Fig. 6 is that the hybrid chamber in dilution mixture chamber in the utility model embodiment cuts open schematic diagram; In figure, 13 represent pre-confounding, and 14 represent retract chamber, 15 represent one-level mixing chamber, and 16 represent diffuser casing, and 17 represent secondary mixing chamber, 18 represent combustion tail gas access port, and 19 represent combustion tail gas entrance, and 22 are positioned at the internal thread that the pre-confounding in dilution mixture chamber coordinates with external thread 21.
Embodiment:
Constant volume combustion bomb products of combustion acquisition system, comprising:
Constant volume combustion bomb 35, for analog fuel burning, comprises air inlet system and exhaust system, heating system, fuel feed system; The products of combustion of constant volume combustion bomb, under the ordering about of high pressure nitrogen, successively through the second solenoid valve, the second flow metering valve, enters the combustion product inlet of breath device of quenching;
To quench breath device 36;
First solenoid valve 31, first flow metering valve 39, the two is arranged on nitrogen cylinder and quenches between breath device; Second solenoid valve 32 is high-temperature solenoid valve; Second flow metering valve 40; The two is arranged on constant volume combustion bomb and quenches between breath device; 3rd solenoid valve 33 is high-pressure solenoid valve; 3rd flow metering valve 41; The two is arranged between nitrogen cylinder and constant volume combustion bomb;
Airbag or gas cylinder 37, collect the product that breath device of quenching finally is got rid of;
Nitrogen cylinder 38, stores liquid nitrogen; The nitrogen that nitrogen cylinder exports is divided into two tunnels; One tunnel through the 3rd solenoid valve, the 3rd flow metering valve, enters constant volume combustion bomb successively; Another road, successively through the first solenoid valve, first flow metering valve, enters the compressed nitrogen entrance of breath device of quenching;
Channels Synchronous Data Acquisition System 42, NI DAQ-6251; Connected to form successively by industrial computer, capture card, charge amplifier, output line, output line is connected to described cylinder pressure sensor.
Single-chip computer control system 34; Described single-chip computer control system is made up of single-chip microcomputer, driver and signal feedback system, and wherein signal feedback system comprises cylinder pressure sensor and A/D analog-digital commutator; Described cylinder pressure sensor is for measuring the pressure signal of described constant volume combustion bomb and being transferred to described A/D analog to digital converter; Described A/D analog to digital converter is used for pressure signal being converted into digital signal and being transferred to described single-chip microcomputer; Described single-chip microcomputer for analyzing digital signal, and by described driver control solenoid valve.
Channels Synchronous Data Acquisition System and single-chip computer control system Controlling solenoid valve action moment.
Products of combustion out to enter to quench breath device through the pipeline of the second flow metering valve and the second solenoid control from constant volume combustion bomb; Nitrogen out enters through the pipeline of first flow metering valve and the first solenoid control breath device of quenching from nitrogen cylinder, products of combustion and nitrogen fully mix together with after breath of quenching from quench breath device outlet flow to airbag or gas cylinder through pipeline; A road is also had to be flow to constant volume combustion bomb through the pipeline of the second flow metering valve and the second solenoid control from nitrogen cylinder nitrogen out.
Described breath device of quenching, comprising: nitrogen jet current pipe 1, liquid nitrogen locker room 2 and dilution mixture chamber 3 three part.
Described nitrogen jet current pipe comprises along flow of nitrogen gas direction: compressed nitrogen entrance 4, taper taper 5 and fluerics 6; Described fluerics comprises: breeze way 7 and one section of contraction section 8 and nitrogen outlet pressure-stabilizing section 9; Breeze way has 4 the liquid nitrogen inlet holes 10 being communicated with fluerics and liquid nitrogen locker room, hole diameter is 1/5th of breeze way caliber herein, and this parameter can better aspirated liquid nitrogen vapor; Pressure-stabilizing section has 12 products of combustion inlet holes, products of combustion inlet hole diameter is identical with liquid nitrogen inlet hole diameter.
Described dilution mixture chamber comprises: pre-confounding 13, retract chamber 14, one-level mixing chamber 15, diffuser casing 16 and secondary mixing chamber 17; It is outer that pre-confounding 13 is coated on fluerics 6, and its left end is connected with the nitrogen jet current seal of tube, and pre-confounding tube wall has combustion product inlet 19; One-level mixing chamber 15 is connected with retract chamber 14, and the length of mixing chamber is 2 times of diameter.
The external part of described retract chamber ending segment and jet pipe is at same facade, and the right-hand member diameter of retract chamber is 2 times of nitrogen jet current pipe port diameter herein; All apply polytetrafluorethylecoatings coatings in the pipeline of device, reduce the suction-operated to products of combustion.
Nitrogen jet current pipe and dilution mixture chamber are tightly connected by screw thread 21,22; Described liquid nitrogen storage room is arranged on nitrogen jet current pipe by screw thread 23, and is sealed by phenyl tetrafluoride pad and dilution mixture chamber.
The constant volume combustion bomb products of combustion acquisition method that above-mentioned acquisition system realizes, comprises the steps:
(1) preliminary work:
The operating condition of test condition I (certain temperature, back pressure and different fuel injectors etc.) that will study is set by constant volume combustion bomb heating system, gas handling system etc., first (solenoid valve 1 of not sampling, high-temperature solenoid valve 2, high-pressure solenoid valve 3 is not all opened), constant volume combustion bomb is allowed to burn once, Channels Synchronous Data Acquisition System normally works, obtain holding the change curve of the t in time of pressure P in bullet, Changing Pattern according to holding pressure in bullet determines timing of combustion A and terminal C, and the time of their correspondences is t respectively
1and t
2, getting the corresponding time of any point B, B point between A point and C point is t
i;
Before sampling, ensure that the first solenoid valve, the second solenoid valve, the 3rd solenoid valve and nitrogen cylinder are not all opened, vacuumized by whole system device with vacuum pump, in elimination pipeline, residual gas is on the impact of sample gas;
(2) sampling process:
Again set same operating condition of test condition I, open nitrogen cylinder;
Single-chip computer control system is utilized to control the first solenoid valve at t
1moment opens, and before collection products of combustion, nitrogen is filled with in breath device of quenching, and ensures it is the environment of low temperature and low pressure when products of combustion enters and quenches breath device, and sample gas is quenched rapidly breath;
At t
imoment single-chip computer control system controls the second solenoid valve and opens, and starts to sample to products of combustion, t
imoment meets according to testing requirements: t
1< t
i≤ t
2;
T
2moment burning terminates, and along with sampling continues to carry out, in constant volume combustion bomb, pressure declines rapidly, at t
2+ Δ t single-chip computer control system controls the 3rd solenoid valve and opens, and utilizing nitrogen to carry out scavenging to remaining in the products of combustion held in bullet, making it all to enter airbag or gas cylinder, thus realizing sampling completely; The concrete testing requirements of selection gist of Δ t and condition (holding the volume etc. holding pressure, airbag or gas cylinder in bullet after playing volume, burning);
Scavenging continues t
0after time, ensure that sample gas is taken out completely, single-chip computer control system controls the first solenoid valve, the second solenoid valve, the 3rd closed electromagnetic valve, and turn off nitrogen cylinder, sampling process terminates;
The ratio of nitrogen dilution products of combustion can be recorded by first, second, third flow metering valve.
Described breath process of quenching is as follows:
In device, be filled with nitrogen, the oxygen in emptying device, device is in the environment of nitrogen always; The nitrogen rate of outflow is improved in taper taper, realizes one-level and accelerates; The one section slow contraction section of nitrogen after breeze way and pressure-stabilizing section, when not affecting jet exit and forming vacuum, realize nitrogen secondary and accelerate;
After nitrogen a period of time, inject liquid nitrogen to liquid nitrogen locker room; Liquid nitrogen in liquid nitrogen storage room can be entered in nitrogen jet current pipe by liquid nitrogen inlet hole and mix with compressed nitrogen, and liquid nitrogen vaporization can take away amount of heat;
Products of combustion enters pre-confounding by combustion product inlet; Negative pressuren zone in nitrogen jet current pipe is introduced high-temperature fuel gas in nitrogen jet current pipe;
The gas being positioned at nitrogen jet current pipe be full of at a high speed, the inert nitrogen of low pressure, the products of combustion flowing into pre-confounding from high-temperature fuel gas pipeline to be entered in jet pipe by products of combustion inlet hole according to a pressure reduction part and mixes with high speed nitrogen.
The utility model is not limited to above-mentioned embodiment, and based on the multiple conversion that the utility model carries out, the device-constant volume combustion bomb producing high-temperature gas as replaced, improvement control method etc., these all belong within protection domain of the present utility model.
Claims (2)
1. constant volume combustion bomb products of combustion acquisition system, is characterized in that, comprising:
Constant volume combustion bomb (35), for analog fuel burning, comprises air inlet system and exhaust system, heating system, fuel feed system; The products of combustion of constant volume combustion bomb, under the ordering about of high pressure nitrogen, successively through the second solenoid valve, the second flow metering valve, enters the combustion product inlet of breath device of quenching;
To quench breath device (36); Described breath device of quenching comprises: nitrogen jet current pipe (1) and dilution mixture chamber (3); Described nitrogen jet current pipe comprises successively along flow of nitrogen gas direction: compressed nitrogen entrance (4), taper taper (5) and fluerics (6); Described fluerics external sheath pre-confounding (13), and pre-confounding left end is connected with the nitrogen jet current seal of tube, pre-confounding tube wall has combustion product inlet (19);
First solenoid valve (31), first flow metering valve (39), the two is arranged on nitrogen cylinder and quenches between breath device;
Second solenoid valve (32) is high-temperature solenoid valve; Second flow metering valve (40); The two is arranged on constant volume combustion bomb and quenches between breath device;
3rd solenoid valve (33) is high-pressure solenoid valve; 3rd flow metering valve (41); The two is arranged between nitrogen cylinder and constant volume combustion bomb;
Airbag or gas cylinder (37), collect the product that breath device of quenching finally is got rid of;
Nitrogen cylinder (38), stores liquid nitrogen; The nitrogen that nitrogen cylinder exports is divided into two tunnels; One tunnel through the 3rd solenoid valve, the 3rd flow metering valve, enters constant volume combustion bomb successively; Another road, successively through the first solenoid valve, first flow metering valve, enters the compressed nitrogen entrance of breath device of quenching;
Channels Synchronous Data Acquisition System (42);
Single-chip computer control system (34); Described single-chip computer control system is made up of single-chip microcomputer, driver and signal feedback system, and wherein signal feedback system comprises cylinder pressure sensor and A/D analog-digital commutator; Described cylinder pressure sensor is for measuring the pressure signal of described constant volume combustion bomb and being transferred to described A/D analog to digital converter; Described A/D analog to digital converter is used for pressure signal being converted into digital signal and being transferred to described single-chip microcomputer; Described single-chip microcomputer for analyzing digital signal, and by described driver control solenoid valve.
2. constant volume combustion bomb products of combustion acquisition system according to claim 1, is characterized in that, described in quench breath device, comprising:
Nitrogen jet current pipe (1), liquid nitrogen locker room (2) and dilution mixture chamber (3) three part;
Described nitrogen jet current pipe comprises along flow of nitrogen gas direction: compressed nitrogen entrance (4), taper taper (5) and fluerics (6); Described fluerics comprises: breeze way (7) and one section of contraction section (8) and nitrogen outlet pressure-stabilizing section (9); Breeze way has 4 the liquid nitrogen inlet holes (10) being communicated with fluerics and liquid nitrogen locker room, hole diameter is 1/5th of breeze way caliber herein, and this parameter can better aspirated liquid nitrogen vapor; Pressure-stabilizing section has 12 products of combustion inlet holes, products of combustion inlet hole diameter is identical with liquid nitrogen inlet hole diameter.
Described dilution mixture chamber comprises: pre-confounding (13), retract chamber (14), one-level mixing chamber (15), diffuser casing (16) and secondary mixing chamber (17); It is outer that pre-confounding (13) is coated on fluerics (6), and its left end is connected with the nitrogen jet current seal of tube, pre-confounding tube wall has combustion product inlet (19); One-level mixing chamber (15) is connected with retract chamber (14), and the length of mixing chamber is 2 times of diameter.
The external part of described retract chamber ending segment and jet pipe is at same facade, and the right-hand member diameter of retract chamber is 2 times of nitrogen jet current pipe port diameter herein; All apply polytetrafluorethylecoatings coatings in the pipeline of device, reduce the suction-operated to products of combustion;
Nitrogen jet current pipe and dilution mixture chamber are tightly connected by screw thread (21,22); Described liquid nitrogen storage room is arranged on nitrogen jet current pipe by screw thread (23), and is sealed by phenyl tetrafluoride pad and dilution mixture chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180552.5U CN204575390U (en) | 2015-03-27 | 2015-03-27 | Constant volume combustion bomb products of combustion acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180552.5U CN204575390U (en) | 2015-03-27 | 2015-03-27 | Constant volume combustion bomb products of combustion acquisition system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730199A (en) * | 2015-03-27 | 2015-06-24 | 天津大学 | System and method for collecting combustion products of constant volume combustion bomb |
| CN115372002A (en) * | 2022-08-29 | 2022-11-22 | 哈尔滨工程大学 | Integrated monitoring control system based on constant volume burning bomb system |
-
2015
- 2015-03-27 CN CN201520180552.5U patent/CN204575390U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730199A (en) * | 2015-03-27 | 2015-06-24 | 天津大学 | System and method for collecting combustion products of constant volume combustion bomb |
| CN115372002A (en) * | 2022-08-29 | 2022-11-22 | 哈尔滨工程大学 | Integrated monitoring control system based on constant volume burning bomb system |
| CN115372002B (en) * | 2022-08-29 | 2023-11-21 | 哈尔滨工程大学 | Integrated monitoring control system based on constant volume combustion bomb system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150819 Effective date of abandoning: 20171114 |
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| AV01 | Patent right actively abandoned |