CN108595828A - The design method of dumper ventilating system - Google Patents
The design method of dumper ventilating system Download PDFInfo
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- CN108595828A CN108595828A CN201810360496.1A CN201810360496A CN108595828A CN 108595828 A CN108595828 A CN 108595828A CN 201810360496 A CN201810360496 A CN 201810360496A CN 108595828 A CN108595828 A CN 108595828A
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- dumper
- ventilating system
- pressure
- current transformer
- boundary condition
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Abstract
The design method of dumper ventilating system, structure including determining dumper ventilating system, including cooling current transformer, traction electric machine, ventilation blower and generator, model is established to dumper ventilating system based on ANSYS softwares, the pressure loss and Fan Selection for calculating dumper ventilating system, can carry out reasonable selection by theoretical calculation calculation in this way.
Description
Technical field
The present invention relates to a kind of design methods of dumper ventilating system
Background technology
Ventilation cooling system mainly cools down current transformer and traction electric machine, as shown in Figure 1, by primary air separating duct, wind turbine and rear air duct
Composition.The power of ventilation blower comes from diesel engine, and wind turbine terminal pad and main generator are coaxial, and main generator is also and crankshaft of diesel engine
It is coaxial to be connected, therefore when diesel engine rotates, wind turbine also rotates with and generates wind pressure, to push the air of entire ducting system
Flowing.The air quantity flow direction of entire ventilating system flows to ventilation blower through primary air separating duct from current transformer and cools down current transformer, using wind turbine into
Enter rear air duct and flow to rear axle housing, after radiating to traction electric machine, in heat loss to air.
Invention content
The technical problem to be solved in the present invention is to provide a kind of self-unloadings that reasonable selection can be carried out according to theoretical calculation
The design method of vehicle ventilating system.
In order to solve the above-mentioned technical problem, the present invention includes the following steps：
A, the structure of dumper ventilating system, including cooling current transformer, traction electric machine, ventilation blower and generator, base are determined
Model is established to dumper ventilating system in ANSYS softwares；
B, the pressure loss of dumper ventilating system is calculated：
One, the Calculation of pressure loss of primary air separating duct：
(1), according to the flow of wind turbine and discharge area, exit fluid velocity can be obtained, therefore primary air separating duct outlet uses
Velocity boundary conditions, entrance are connected with current transformer, and current transformer crushing is provided by supplier, therefore primary air separating duct entrance uses pressure
Boundary condition；
(2), primary air separating duct pressure field cloud atlas is calculated according to Fluent and is analyzed；
Two, the Calculation of pressure loss in rear air duct：
(1), according to the flow of wind turbine and discharge area, exit fluid velocity can be obtained, because hereafter tunnel inlet uses
Velocity boundary conditions, outlet are connected with current transformer, and current transformer crushing is provided by supplier, because hereafter ducting outlet uses pressure
Boundary condition；
(2), rear duct pressure field cloud atlas is calculated according to Fluent and is analyzed；
Three, dust cover Calculation of pressure loss：
(1), the calculating of dust cover uses entrance velocity boundary condition and outlet pressure boundary condition；
(2), dust cover pressure field cloud atlas is calculated according to Fluent and is analyzed；
C, Fan Selection：Suitable ventilation blower is chosen according to the result that above-mentioned steps calculate.
As a further improvement on the present invention, in the three of step B：The model of dust cover is simplified, according to equivalent
The aperture of multiple small areas in dust cover side wall surface is reduced to the macropore of a small amount of large area by area principle so that before and after simplifying
Perforated area is equal.
Description of the drawings
It is next with reference to the accompanying drawings and detailed description that the present invention will be further described in detail.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is primary air separating duct pressure field cloud atlas.
Fig. 3 is rear duct pressure field cloud atlas.
Fig. 4 is dust cover pressure field cloud atlas.
Fig. 5 is ventilator parameters and performance curve.
Specific implementation mode
The present invention includes the following steps：
A, it determines the structure of dumper ventilating system, includes cooling current transformer 1, traction electric machine 2, ventilation blower 3 as shown in Figure 1
With generator 4, model is established to dumper ventilating system based on ANSYS softwares, this ventilation cooling system uses cascaded structure,.
Current transformer cools down for exhausting, and primary air separating duct entrance is connect with current transformer, enters primary air separating duct after cooling air cooling current transformer, by ventilation
Machine is pressurized, then air duct after flowing into, and is cooled down rear bridge driven motor into rear axle housing, is then passed through dust cover and be discharged into air.Entire system
The structure that system generates the pressure loss includes current transformer, primary air separating duct, rear air duct and motor, dust cover etc..Wherein cooling wind is passed through
Enter rear axle housing after air duct afterwards, then spread to both ends, then passes through hub reduction gear, finally enter motor and cooled down.Afterwards
Air duct in axle housing and retarder is complex, and crushing is larger, therefore this part crushing cannot be ignored, and rear air duct should be contributed to
The pressure loss.It is separated by motor between dust cover and rear air duct, therefore the crushing of dust cover individually calculates.Its side is provided with small
The protective effect of dust-proof anti-stone is played in hole.Current transformer, driving motor, primary air separating duct and the sum of the crushing in rear air duct, are exactly wind turbine
Minimum head pressure.
B, the pressure loss of dumper ventilating system is calculated：
One, the Calculation of pressure loss of primary air separating duct：
(1), in general, the running environment of electric power wheel self-discharging vehicle is complicated, and operating condition is changeable, it is difficult to determine its true work
Condition, therefore take most extreme operating condition, in other words operating mode when crushing maximum calculate.
According to the empirical equation of the pressure loss：
Wherein, ε is pressure drop coefficient, wherein frictional resistant coefficient and viscosity positive correlation, local resistance loss coefficient with
Shape is related；ρ is density；V is speed.
The pressure loss and density, viscosity and speed are related.Wherein, gas viscosity and gas density are negatively correlated.Cause
Increase as the temperature increases for gas viscosity, and gas density reduces as temperature increases.Therefore, for the sake of safety, this
Text takes operating mode when maximum density, viscosity maximum to be calculated, and this operating mode is not necessary being, but is beneficial to calculating
's.
According to the operating condition of electric power wheel self-discharging vehicle, minimum environment temperature is -25 degree, and highest environment temperature is 50 degree, most
500 meters of High aititude.Therefore it is 0 to calculate and take height above sea level, and temperature is -25 density when spending to calculate, that is, takes ρ=1.365kg/m3；By
In cooling air, Wen Sheng, viscosity when to take temperature be 60 degree calculate after current transformer, i.e. μ=2.04e-5PaS.Current transformer institute
Required airflow is 2.8m3/ s, rear bridge driven motor institute required airflow are 1.8m3/ s, two motors need 3.6m3/ s, therefore compressor flow
At least 3.6m3/s。
According to the flow and discharge area of wind turbine, exit fluid velocity can be obtained, therefore primary air separating duct outlet uses speed
Boundary condition, entrance are connected with current transformer, and current transformer crushing is provided by supplier, therefore primary air separating duct entrance uses pressure boundary
Condition, current transformer value of pressure loss 1720Pa take the primary air separating duct inlet pressure to be：
PEnter=-1720Pa；vGo out=L/SGo out=26m/s.
(2), primary air separating duct pressure field cloud atlas, such as Fig. 2 are calculated according to Fluent, and are analyzed, the pressure of primary air separating duct
Loss is concentrated mainly on air duct corner.Final outlet face average pressure is -2230Pa, therefore primary air separating duct crushing is 510Pa；
Two, the Calculation of pressure loss in rear air duct：
(1), rear air duct connection wind turbine and rear axle housing.Wind flows through rear air duct from wind turbine, subsequently into rear axle housing, by slowing down
Device enters motor and is cooled down, and eventually passes through dust cover and is discharged into air.Because the windage in hereafter air duct not only includes the wind of pipeline
Resistance, the windage of rear axle housing, retarder and dust cover is all bigger, cannot ignore, and should contribute to rear air duct windage one by one
According to the flow and discharge area of wind turbine, exit fluid velocity can be obtained, because hereafter tunnel inlet uses speed
Boundary condition, outlet are connected with current transformer, and current transformer crushing is provided by supplier, because hereafter ducting outlet uses pressure boundary
Condition；The motor value of pressure loss 1.5kPa provided according to motor supplier, it may be determined that the pressure value P in exitGo out=1500Pa；
(2), rear duct pressure field cloud atlas is calculated according to Fluent, as shown in figure 3, and being analyzed；Air duct afterwards
The pressure loss is concentrated mainly at rear axle housing and retarder.Final inlet face average pressure is 2752Pa, exit face mean pressure
Power is 1570Pa, because the pressure loss in hereafter air duct is 1182Pa.
Three, dust cover Calculation of pressure loss：
(1), the model of dust cover is simplified, according to equivalent area principle, by multiple facets in dust cover side wall surface
Long-pending aperture is reduced to the macropore of a small amount of large area so that perforated area is equal before and after simplifying, and the calculating of dust cover uses entrance
Velocity boundary conditions and outlet pressure boundary condition；
(2), dust cover pressure field cloud atlas, such as Fig. 4 are calculated according to Fluent, and are analyzed；Pass through dust cover pressure
Power cloud atlas can be seen that gas and produce the larger pressure loss when flowing through perforation.The face of final dust cover inlet face is average
Pressure is 544Pa, and exit face average pressure is 21Pa.Therefore the crushing of dust cover is 523Pa.
It is calculated by 10% surplus, total windage is 5980Pa.Therefore ventilating system should use flow >=3600L/s, total head
Electric drive system cooling is carried out for the wind turbine of 6kPa or more.
C, Fan Selection：Suitable ventilation blower is chosen according to the result that above-mentioned steps calculate：
According to parameter result of calculation, under declared working condition, entire ventilating system greatest requirements air quantity is 3.6m3/ s, wind pressure are
6.0kPa selects TLTF8.1 centrifugal fans, parameter see the table below：
Ventilator parameters and performance curve are as shown in figure 5, from characteristic curve of fan and parameter it is found that wind turbine is in 1800r/
Min, air quantity 4.41m3When/s, wind pressure 6.063kPa, so selected TLTF8.1 centrifugal fans meet design requirement.
Claims (2)
1. a kind of design method of dumper ventilating system, which is characterized in that include the following steps：
A, the structure of dumper ventilating system, including cooling current transformer, traction electric machine, ventilation blower and generator are determined, is based on
ANSYS softwares establish model to dumper ventilating system；
B, the pressure loss of dumper ventilating system is calculated：
One, the Calculation of pressure loss of primary air separating duct：
(1), according to the flow of wind turbine and discharge area, exit fluid velocity can be obtained, therefore primary air separating duct outlet uses speed
Boundary condition, entrance are connected with current transformer, and current transformer crushing is provided by supplier, therefore primary air separating duct entrance uses pressure boundary
Condition；
(2), primary air separating duct pressure field cloud atlas is calculated according to Fluent and is analyzed；
Two, the Calculation of pressure loss in rear air duct：
(1), according to the flow of wind turbine and discharge area, exit fluid velocity can be obtained, because hereafter tunnel inlet uses speed
Boundary condition, outlet are connected with current transformer, and current transformer crushing is provided by supplier, because hereafter ducting outlet uses pressure boundary
Condition；
(2), rear duct pressure field cloud atlas is calculated according to Fluent and is analyzed；
Three, dust cover Calculation of pressure loss：
(1), the calculating of dust cover uses entrance velocity boundary condition and outlet pressure boundary condition；
(2), dust cover pressure field cloud atlas is calculated according to Fluent and is analyzed；
C, Fan Selection：Suitable ventilation blower is chosen according to the result that above-mentioned steps calculate.
2. the design method of dumper ventilating system as described in claim 1, it is characterised in that：In the three of step B：To anti-
The model of dust hood is simplified, and according to equivalent area principle, the aperture of multiple small areas in dust cover side wall surface is reduced to few
Measure the macropore of large area so that it is equal to simplify front and back perforated area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810360496.1A CN108595828A (en) | 2018-04-20 | 2018-04-20 | The design method of dumper ventilating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810360496.1A CN108595828A (en) | 2018-04-20 | 2018-04-20 | The design method of dumper ventilating system |
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| Publication Number | Publication Date |
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| CN108595828A true CN108595828A (en) | 2018-09-28 |
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| CN201810360496.1A Pending CN108595828A (en) | 2018-04-20 | 2018-04-20 | The design method of dumper ventilating system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202931114U (en) * | 2012-11-19 | 2013-05-08 | 广州电力机车有限公司 | Traction motor drive ventilation system for 220t electric wheel dump truck |
| CN104214903A (en) * | 2014-09-29 | 2014-12-17 | 中建三局第二建设工程有限责任公司 | Air conditioner cooling tower group control method based on semi-closed space |
| US20170066318A1 (en) * | 2014-02-27 | 2017-03-09 | Komatsu Ltd. | Dump Truck |
| CN107832521A (en) * | 2017-11-03 | 2018-03-23 | 西安理工大学 | A kind of Optimization Design of gravure press dryer intake stack system |
-
2018
- 2018-04-20 CN CN201810360496.1A patent/CN108595828A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202931114U (en) * | 2012-11-19 | 2013-05-08 | 广州电力机车有限公司 | Traction motor drive ventilation system for 220t electric wheel dump truck |
| US20170066318A1 (en) * | 2014-02-27 | 2017-03-09 | Komatsu Ltd. | Dump Truck |
| CN104214903A (en) * | 2014-09-29 | 2014-12-17 | 中建三局第二建设工程有限责任公司 | Air conditioner cooling tower group control method based on semi-closed space |
| CN107832521A (en) * | 2017-11-03 | 2018-03-23 | 西安理工大学 | A kind of Optimization Design of gravure press dryer intake stack system |
Non-Patent Citations (6)
| Title |
|---|
| 刘梦安等: "多工况离心通风机的气动方案设计与验证", 《现代机械》 * |
| 蔡芬等: "电传动矿用自卸车车载风机设计研究", 《通用机械》 * |
| 袁泉: "污水厂离心鼓风机选型中风量和风压的计算", 《工业用水与废水》 * |
| 袁莉: "基于Ansys通风机流场的仿真", 《煤矿机械》 * |
| 陆远: "韶山8型电力机车通风冷却系统性能分析与改进措施", 《工程科技Ⅱ辑》 * |
| 陆远: "韶山8型电力机车通风冷却系统性能分析与改进措施", 《工程科技II辑》 * |
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Application publication date: 20180928 |