CN103575338A - Flow test bench for exhaust valves of mufflers of motorcycles - Google Patents
Flow test bench for exhaust valves of mufflers of motorcycles Download PDFInfo
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- CN103575338A CN103575338A CN201210268243.4A CN201210268243A CN103575338A CN 103575338 A CN103575338 A CN 103575338A CN 201210268243 A CN201210268243 A CN 201210268243A CN 103575338 A CN103575338 A CN 103575338A
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- flow
- vent valve
- motorcycle
- air
- supporting seat
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Abstract
The invention discloses a flow test bench for exhaust valves of mufflers. The flow test bench comprises a stable airflow source, an air channel test bed, a sensing system, a to-be-tested muffler and control and display portions. A variable-frequency motor drives a swirl type air pump of a turbine, so that the stable airflow source can provide an air source. The air channel test bed comprises an air pipe, a shock-proof hose, a support 1, a support 2, an operating handle and a cylinder. The sensing system measures flow of air by the aid of a vortex shedding flow meter, and measures the internal air pressure of a front pipe of the to-be-tested muffler by the aid of a pressure transmitter. The display portion comprises a paperless recorder. The control portion mainly acquires flow and pressure signals by the aid of an A\D (analog\digital) microprocessor and controls the frequency of a frequency converter so as to control the rotational speed of the variable-frequency motor. The flow test bench has the advantages that the flow of the air which flows through a remaining space of an exhaust valve when the exhaust valve of the muffler is closed can be measured under certain specified airflow pressure; the test bench is high in measurement precision, and both the pressure test precision and the flow test precision can reach 1.5%; the test bench can be operated flexibly and conveniently.
Description
Technical field
The present invention relates to a kind of test board device, relate in particular to a kind of vent valve flow rate test platform.
Background technology
In exhaust system, the reduction of noise is closely-related with power loss, and power loss is directly relevant with exhaust back pressure, can be by measuring.The generation of back pressure is owing to existing and airflow direction opposite effect power, and this acting force may or flow due to pipeline and itself produce.Back pressure increases, and air moves and will consume part energy in air inlet system and exhaust system, i.e. the energy of consumption of engine.If intake and exhaust pipeline sectional area is larger, circulation of air is just more smooth and easy, and power loss is just less.Reducing noise but needs sectional area less, and the resistance that gas flow is subject to is the bigger the better.Therefore when design sound suppressor, there will be the situation of such contradiction, adopt simple, low-impedance structure can make back pressure reduce, power loss reduces, but tail pipe noise is larger; Adopt acoustic wave filter structure meeting noise decrease large complicated, high impedance, but backpressure rising, power loss raises.So both will take into account in the time of must designing, make it reach a preferably binding site.For high-grade racing car, adopted muffler back pressure regulation technology for this reason, design a special-purpose vent valve, be installed on sound suppressor entrance or outlet, racing driver can be according to actual motion situation, by steel wire, regulate the switch area of back pressure, take into account sound deadening capacity and engine capacity and regulate.For this valve, be necessary that the flow of detection under certain air pressure is to be installed on sound suppressor, so this vent valve flow rate test platform arises at the historic moment.
Summary of the invention
The technical solution adopted for the present invention to solve the technical problems comprises:
Sound suppressor vent valve flow rate test platform is comprised of steady air flow source, gas circuit stand, sensor-based system, sound suppressor to be measured and control and display section.Wherein steady air flow source adopts variable-frequency motor to drive the vortex air pump of turbine that source of the gas is provided.Gas circuit stand is by being comprised of tracheae, shock-absorbing flexible pipe, supporting seat 1, supporting seat 2, operating grip, cylinder.Sensor-based system adopts vortex shedding flow meter measurement gas flow, adopts the front intraductal atmospheric pressure of pressure transmitter measurement sound suppressor to be measured.Display section is recording instrument without paper.Control section mainly gathers flow and pressure signal by microprocessor A D, and controls frequency converter frequency to control variable-frequency motor rotating speed.
This equipment be take 32 bit CPUs as core, is aided with large scale integrated circuit and graphic lcd, and by intelligent recorder, display measurement data result, can automatic alarm when defective.Equipment operating is simple.There is following principal feature:
(1) without pen, without paper record, line service amount is little, automaticity is high.
(2) adopt import TFT5.6 inch 320*240 lattice graphics lcd display screen, high brightness LED backlight is blank screen never, has that picture is clear, stable performance, lucuriant in design, visual angle is wide, the features such as long service life.
(3) adopt high speed, high-performance 32-bit ARM microprocessor, picture response is less than 0.2 second, can realize 16 tunnel signals collecting, record, the warning of demonstration He12 road simultaneously.
(4) the jumbo FLAH of color 256M dodges and recommends chip storage historical data, and power down is obliterated data never.
(5) entirely isolate omnipotent input, can input multi-signal simultaneously, without changing module, by software configuration.
(6) there is flashing light alarm and show, lower limit, lower limit, the upper limit, the upper upper limit alarm of indicating each road to report to the police simultaneously.
(7) display precision fundamental error is ± 0.2%FS.
(8) support external mini-printer, manually print data, curve.
(9) adopt novel switched power supply, can within the scope of AC power 85VAC-265VAC, 45-65HZ, work.
Technical indicator
(1) operating voltage: 220V; Electric current: 4A; Power: 4KW; Frequency: 50Hz;
(2) measurement range: air pressure 0-10KPa, flow 15-150m
3/ h
The invention has the beneficial effects as follows:
1 can measure under a certain particular airflow pressure, and sound suppressor vent valve flows through the gas flow of vent valve remaining space when closed.
2 test board measuring accuracy are high, and pressure and flow rate test all reach 1.5%.
3 test board flexible and convenient operation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 sound suppressor vent valve flow rate test platform schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, the present invention is comprised of automobile filter (1), turbine (2), variable-frequency motor (3), shock-absorbing flexible pipe (4), tracheae (5), supporting seat 1 (12), supporting seat 2 (11), operating grip (9), cylinder (10), vortex shedding flow meter (6), pressure unit (7), recording instrument without paper (8), control system (14).
Principle of work of the present invention is as follows:
When test, vent valve is inserted between supporting seat 1 (12) and supporting seat 2 (11), operate control knob simultaneously and make cylinder action, cylinder promotes supporting seat 2, vent valve is just clamped between supporting seat 1 (12) and supporting seat 2 (11), depress operating grip, by vent valve valve closing, actuating motor, outside air is by automobile filter (1), turbine (2) enters tracheae (5), and discharge by vent valve, turbine is controlled rotating speed by variable-frequency motor, control thus gaseous tension in tracheae, when pressure unit reaches a certain particular requirement value, measure the flow of vent valve, must make flow now be no more than a certain particular value, motorcycle engine power loss is no more than the requirement of a certain particular value when meeting noise eliminator of motorcycle exhaust valve closure.
Claims (7)
1. a noise eliminator of motorcycle vent valve flow rate test platform, it is characterized in that: when test, vent valve is inserted between supporting seat 1 and supporting seat 2, operate control knob simultaneously and make cylinder action, cylinder promotes supporting seat 2, vent valve is just clamped between supporting seat 1 and supporting seat 2, depress operating grip, by vent valve valve closing, actuating motor, outside air passes through automobile filter, turbine enters tracheae, and discharge by vent valve, turbine is controlled rotating speed by variable-frequency motor, control thus gaseous tension in tracheae, when pressure unit reaches a certain particular requirement value, measure the flow of vent valve, must make flow now be no more than a certain particular value, motorcycle engine power loss is no more than the requirement of a certain particular value when meeting noise eliminator of motorcycle exhaust valve closure.
2. noise eliminator of motorcycle vent valve flow rate test platform according to claim 1, is characterized in that: sound suppressor vent valve flow rate test platform is comprised of steady air flow source, gas circuit stand, sensor-based system, sound suppressor to be measured and control and display section.
3. noise eliminator of motorcycle device according to claim 1, is characterized in that: steady air flow source adopts variable-frequency motor to drive the vortex air pump of turbine that source of the gas is provided.
4. noise eliminator of motorcycle vent valve flow rate test platform according to claim 1, is characterized in that: gas circuit stand is by being comprised of tracheae, shock-absorbing flexible pipe, supporting seat 1, supporting seat 2, operating grip, cylinder.
5. noise eliminator of motorcycle vent valve flow rate test platform according to claim 1, is characterized in that: sensor-based system adopts vortex shedding flow meter measurement gas flow, adopts the front intraductal atmospheric pressure of pressure transmitter measurement sound suppressor to be measured.
6. noise eliminator of motorcycle vent valve flow rate test platform according to claim 1, is characterized in that: display section is recording instrument without paper.
7. noise eliminator of motorcycle vent valve flow rate test platform according to claim 1, is characterized in that: control section mainly gathers flow and pressure signal by microprocessor A D, and controls frequency converter frequency to control variable-frequency motor rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268243.4A CN103575338A (en) | 2012-07-31 | 2012-07-31 | Flow test bench for exhaust valves of mufflers of motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268243.4A CN103575338A (en) | 2012-07-31 | 2012-07-31 | Flow test bench for exhaust valves of mufflers of motorcycles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103575338A true CN103575338A (en) | 2014-02-12 |
Family
ID=50047619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210268243.4A Pending CN103575338A (en) | 2012-07-31 | 2012-07-31 | Flow test bench for exhaust valves of mufflers of motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103575338A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152181A (en) * | 1990-01-19 | 1992-10-06 | Lew Hyok S | Mass-volume vortex flowmeter |
| CN2218927Y (en) * | 1995-05-17 | 1996-01-31 | 严海德 | Testing table for gas pressure part |
| CN201126395Y (en) * | 2007-11-12 | 2008-10-01 | 上海市特种设备监督检验技术研究院 | Gas cylinder valve air tightness test system |
| CN201757697U (en) * | 2008-08-18 | 2011-03-09 | 上海协昌霍宁实业发展有限公司 | Automobile turbocharger intermediate housing airtightness testing device |
| CN102589894A (en) * | 2012-03-01 | 2012-07-18 | 南京航空航天大学 | Micro gas compressor/turbine combined test bed and test method |
-
2012
- 2012-07-31 CN CN201210268243.4A patent/CN103575338A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152181A (en) * | 1990-01-19 | 1992-10-06 | Lew Hyok S | Mass-volume vortex flowmeter |
| CN2218927Y (en) * | 1995-05-17 | 1996-01-31 | 严海德 | Testing table for gas pressure part |
| CN201126395Y (en) * | 2007-11-12 | 2008-10-01 | 上海市特种设备监督检验技术研究院 | Gas cylinder valve air tightness test system |
| CN201757697U (en) * | 2008-08-18 | 2011-03-09 | 上海协昌霍宁实业发展有限公司 | Automobile turbocharger intermediate housing airtightness testing device |
| CN102589894A (en) * | 2012-03-01 | 2012-07-18 | 南京航空航天大学 | Micro gas compressor/turbine combined test bed and test method |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140212 |