CN106092592A - Agricultural plant protection helicopter engine gas extraction system optimization Test device - Google Patents
Agricultural plant protection helicopter engine gas extraction system optimization Test device Download PDFInfo
- Publication number
- CN106092592A CN106092592A CN201610625371.8A CN201610625371A CN106092592A CN 106092592 A CN106092592 A CN 106092592A CN 201610625371 A CN201610625371 A CN 201610625371A CN 106092592 A CN106092592 A CN 106092592A
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- CN
- China
- Prior art keywords
- procapsid
- back casing
- plant protection
- gas extraction
- test device
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The present invention relates to engine exhaust system and optimize device, belong to technical field of engines.This device includes electromotor and resonator cavity, described resonator cavity is made up of procapsid and back casing two part, procapsid and rear housing body are cylinder, and described procapsid is coaxially socketed with back casing, and procapsid is provided with sealing mechanism with the position of back casing socket.Actively having the beneficial effects that of the present invention provides agricultural plant protection helicopter engine gas extraction system optimization Test device, for the design to engine exhaust system, can save and conventional design flow calculates the step that resonant cavity amasss and makes experimental trachea, reduce cost of manufacture, shorten the design cycle.
Description
Technical field
The present invention relates to engine exhaust system and optimize device, particularly a kind of agricultural plant protection helicopter engine exhaust system
System optimization Test device, belongs to technical field of engines.
Background technology
Doing work successively burning, then aerofluxus it is known that the operation principle of electromotor is every cylinder, therefore electromotor is produced
Waste gas to be ripple one rolling land discharge from gas extraction system.When a ripple waste gas outwards discharges, negative pressure can be produced in the behind of waste gas
State, for next ripple aerofluxus, this negative pressure is equivalent to suction and sobs power, and the waste gas that next ripple can be helped to discharge is discharged faster
Outside electromotor, so circulation can improve exhaust efficiency.Here it is resonance effect produced by our described exhaust back pressure, return
Pressure value is the highest, and the low torsion of electromotor will be the best, relative, and back pressure value is the lowest, and torsion is the poorest.But when electromotor is in not
During with rotating speed, the requirement to back pressure is the most different, and when high rotating speed, each cylinder operation gap diminishes so that the effect of resonance effect
Become unlike so notable during the slow-speed of revolution, and too high back pressure produces excessive resistance in will making discharge duct, the highest
During rotating speed, in the unit interval, air inlet and capacity are all greatly improved, and exhaust structure cannot tackle carrying of capacity in the unit interval
Rising, when causing high rotating speed, exhaust efficiency reduces, exhaust efficiency is deteriorated, and waste gas row has some setbacks, and air inlet is inevitable again also can be subject to
Impact.Current plant protection helicopter engine typically use for two stroke engine, the two stroke engine of each model
There are oneself optimal power rotating speed and optimal torsion rotating speed, how engine power performed to ultimate attainment, obtain this and start
The peak efficiency of machine output, the design of gas extraction system particularly exhaustor is the most crucial.To this end, engine designer needs pin
The cavity of exhaustor is optimized with size by the gas handling system situation of certain electromotor, utilizes aerofluxus resonance principle, i.e. with
The rotating speed of electromotor and the frequency of exhaust work, the gas column in exhaustor cavity changes from just pressing to negative-pressure cyclic, design
The cavity of exhaustor and size, need therebetween to take into full account and utilize pressure wave effect to determine maximum power point, utilizes aerofluxus resonance
Principle determines acrotorque point, to reach the effect that electromotor gets twice the result with half the effort in certain power frequency.And plant protection helicopter engine, agriculture
Relatively stable near with depopulated helicopter operationally power, power frequency change excursion compared with the carrier of ground is little, the most stable
Work a suitable operating point, so should have an optimal resonator cavity volume relative to its operating power, therefore,
Determine a suitable exhaustor resonant volume, particularly important in plant protection helicopter engine designs.Traditional plant protection is gone straight up to
During the design of the machine exhaust pipe of engine, first have to the approximate volume utilizing empirical equation to calculate exhaustor resonator cavity, but in formula
A lot of parameters, such as exhaust port temperatures (at piston) and exhaustor resonance complete the decay temperature of discharge, dissipate for difference
It is also different for reducing temperature after the exhaustor heat radiation that hot side is long-pending, hardly results in accurately setting, directly influences calculate humorous
Shake the accuracy in chamber.Therefore, in real work, after calculating the volume of resonator cavity, often also need to through making the humorous of reality
Shake chamber at, computer experiment, revise again, go up the loaded down with trivial details steps such as machine test again and could finally determine the resonator cavity volume of optimum.This
The kind method lead time is long, and high to designer's design experiences dependency, cost also remains high, and is that agricultural plant protection unmanned plane is sent out
A bottleneck in motivation gas extraction system development process.
Summary of the invention
It is an object of the invention to: overcome design cycle length, cost in the design of current agricultural plant protection engine exhaust system
The problems such as height, it is provided that a kind of agricultural plant protection helicopter engine gas extraction system optimization Test device.
For realizing the purpose of the present invention, the technical scheme of employing is: agricultural plant protection helicopter engine gas extraction system optimizes
Assay device, including electromotor and resonator cavity, described resonator cavity is made up of procapsid and back casing two part, procapsid and after
Housing body is cylinder, and described procapsid is coaxially socketed with back casing, and the position that procapsid is socketed with back casing is provided with
Sealing mechanism；Further, described procapsid is threaded connection with back casing, and described screw thread is O-ring taper pipe thread；Enter
One step, described back casing internal diameter is more than procapsid external diameter, and back casing is socketed in outside procapsid, and procapsid is opened along housing circumference
Having groove, be provided with sealing ring in groove, described sealing ring closely cooperates with back casing inner face；Further, described procapsid circumference
Having multiple groove, be provided with sealing ring in each groove, described sealing ring closely cooperates with back casing inner face.
The present invention actively has the beneficial effects that: the invention provides a kind of agricultural plant protection helicopter engine gas extraction system
Optimization Test device, for being designed plant protection engine exhaust system, after the present invention is accessed electromotor, utilizes the present invention
The continuously adjustable feature of volume, adjusts the resonator cavity of different volumes, the simultaneously parameter such as power moment of torsion of on-line measurement electromotor,
Can directly determine the exhaustor resonator cavity volume of optimum, can save and conventional design flow first calculates resonator cavity volume, again
The tedious steps make exhaustor, testing, revising again, reduces cost of manufacture, shortens the design cycle.
Accompanying drawing explanation
Fig. 1 is one embodiment of the present of invention schematic diagram.
Fig. 2 is an alternative embodiment of the invention schematic diagram.
Fig. 3 is the enlarged drawing of procapsid in Fig. 2.
Detailed description of the invention
In order to explain the enforcement of the present invention more fully, the embodiment of the present invention presented below, these embodiments are only
It is only the elaboration to the present invention, does not limits the scope of the invention.
In conjunction with accompanying drawing explanation further details of to the present invention, accompanying drawing is labeled as: 1. procapsid；2. back casing；The closeest
Seal ring.As can be seen from Figure: agricultural plant protection helicopter engine gas extraction system optimization Test device, including electromotor, start
Acc power test device and resonator cavity, described resonator cavity is made up of procapsid 1 and 2 liang of parts of back casing, procapsid 1 and back cover
Body 2 main body is cylinder, and described procapsid 1 is coaxially socketed with back casing 2, and procapsid 1 is arranged with the position of back casing 2 socket
There is sealing mechanism；Further, described procapsid 1 is threaded connection with back casing 2, and described screw thread is O-ring Taper Pipe spiral shell
Stricture of vagina；Further, described back casing 2 internal diameter is more than procapsid 1 external diameter, and it is outside that back casing 2 is socketed in procapsid 1, procapsid 1 edge
Housing circumference has groove, is provided with sealing ring 3 in groove, and described sealing ring 3 closely cooperates with back casing 2 inner face；Further, institute
Stating procapsid 1 circumference and have multiple groove, be provided with sealing ring 3 in each groove, described sealing ring 3 is tight with back casing 2 inner face
Coordinate.Fig. 1 is one embodiment of the present invention, and procapsid 1 is threadeded by sealing pipe with back casing 2, the row of being possible to prevent
Atmospheric pressure reveal, procapsid 1 is provided with the pipeline of access to engine, time actually used, the present invention is accessed electromotor as
Exhaust apparatus, electromotor is provided with power-measuring device, after firing an engine, just can change shell by rotating back casing 2
Resonant cavity volume between body 1 and housing 2, reads the real-time number of engine power and moment of torsion while adjusting resonator cavity volume
According to, i.e. can determine that the optimal volume of resonator cavity.Fig. 2 is another embodiment of the invention, and Fig. 3 is the putting of procapsid in Fig. 2
Big figure, it can be seen that in the present embodiment, back casing 2 internal diameter is more than procapsid 1 external diameter, and back casing 2 is socketed in procapsid
1 is outside, and procapsid has groove along housing circumference, is provided with sealing ring 3 in groove, carries out the joint portion of procapsid 1 and back casing 2
Seal, just can be changed the volume of resonator cavity by slide anteroposterior back casing, record optimal resonance in real time equally online
Cavity volume.If the engine power of test is relatively big, in the case of pressure at expulsion is big, it is also possible to arrange multiple tracks on procapsid close
Seal ring 3 is to strengthen sealing effectiveness.
Claims (4)
1. agricultural plant protection helicopter engine gas extraction system optimization Test device, including electromotor and resonator cavity, described resonance
Chamber is made up of procapsid and back casing two part, and procapsid and rear housing body are cylinder, described procapsid and back casing
Coaxial socket, procapsid is provided with sealing mechanism with the position of back casing socket.
Agricultural plant protection helicopter engine gas extraction system optimization Test device the most according to claim 1, it is characterised in that:
Described procapsid is threaded connection with back casing, and described screw thread is O-ring taper pipe thread.
Agricultural plant protection helicopter engine gas extraction system optimization Test device the most according to claim 1, it is characterised in that:
Described back casing internal diameter is more than procapsid external diameter, and back casing is socketed in outside procapsid, and procapsid has groove, groove along housing circumference
Inside being provided with sealing ring, described sealing ring closely cooperates with back casing inner face.
Agricultural plant protection helicopter engine gas extraction system optimization Test device the most according to claim 1, it is characterised in that:
Described procapsid circumference has multiple groove, is provided with sealing ring in each groove, and described sealing ring is closely joined with back casing inner face
Close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610625371.8A CN106092592A (en) | 2016-08-03 | 2016-08-03 | Agricultural plant protection helicopter engine gas extraction system optimization Test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610625371.8A CN106092592A (en) | 2016-08-03 | 2016-08-03 | Agricultural plant protection helicopter engine gas extraction system optimization Test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106092592A true CN106092592A (en) | 2016-11-09 |
Family
ID=57454237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610625371.8A Pending CN106092592A (en) | 2016-08-03 | 2016-08-03 | Agricultural plant protection helicopter engine gas extraction system optimization Test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106092592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577428A (en) * | 2020-04-17 | 2020-08-25 | 中国第一汽车股份有限公司 | Exhaust device and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3899749A (en) * | 1971-07-20 | 1975-08-12 | Rolls Royce | Gas dynamic lasers |
| CN2713139Y (en) * | 2004-05-13 | 2005-07-27 | 陈健仲 | Return pressure adjusting structure for exhaust pipe |
| CN101289952A (en) * | 2008-06-03 | 2008-10-22 | 重庆大学 | Expanding cavity adjustable exhaust silencer |
| CN201177562Y (en) * | 2008-03-31 | 2009-01-07 | 重庆长安汽车股份有限公司 | Frequency adjustable type air inlet silencing apparatus test device |
| CN104500195A (en) * | 2014-11-21 | 2015-04-08 | 桂林新艺制冷设备有限责任公司 | Engine |
| CN205958266U (en) * | 2016-08-03 | 2017-02-15 | 安阳全丰航空植保科技股份有限公司 | Agricultural plant protection helicopter engine exhaust system optimization test device |
-
2016
- 2016-08-03 CN CN201610625371.8A patent/CN106092592A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3899749A (en) * | 1971-07-20 | 1975-08-12 | Rolls Royce | Gas dynamic lasers |
| CN2713139Y (en) * | 2004-05-13 | 2005-07-27 | 陈健仲 | Return pressure adjusting structure for exhaust pipe |
| CN201177562Y (en) * | 2008-03-31 | 2009-01-07 | 重庆长安汽车股份有限公司 | Frequency adjustable type air inlet silencing apparatus test device |
| CN101289952A (en) * | 2008-06-03 | 2008-10-22 | 重庆大学 | Expanding cavity adjustable exhaust silencer |
| CN104500195A (en) * | 2014-11-21 | 2015-04-08 | 桂林新艺制冷设备有限责任公司 | Engine |
| CN205958266U (en) * | 2016-08-03 | 2017-02-15 | 安阳全丰航空植保科技股份有限公司 | Agricultural plant protection helicopter engine exhaust system optimization test device |
Non-Patent Citations (1)
| Title |
|---|
| 徐斌 等: "某型航空活塞发动机进排气系统优化分析", 《航空动力学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577428A (en) * | 2020-04-17 | 2020-08-25 | 中国第一汽车股份有限公司 | Exhaust device and control method thereof |
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Application publication date: 20161109 |
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