附录
The new high pressure cleaning the car
With the rapid development of industry, environment pollution is becoming more and more rious, the environmental protection question is already a global strategy. In order to adapt to the needs of the construction of urban environmental sanitation, clear in time the city, improve air quality, sanitation vehicles of development and development, has become an important topic of the t before us. The development of urbanization in our country, the increa of the road to the requirements of environmental protection and improve, which makes the sanitation car requirement increasingly, high pressure cleaning the car as a sanitation in vehicles, having to clean the road, guardrail and purify airy action, is one of the important urban environmental protection equipment. The current domestic production of high pressure cleaning car backward in technology, there are many problems; Foreign cleaning vehicle performance while is superior, but the price is expensive, need a lot of foreign exchange, it is not the solution to the problem. Therefore, the development of new high pressure cleaning cars has become China's urban environmental protection work important problem to be solved. It not only with independent intellectual property rights, and can improve the design level of our country special automobile, driving the sanitation vehicles in China to develop and manufacture indepe
ndent design ability.
拆除英文
1 a general introduction
High pressure cleaning cars mainly by the power system, water system and hydraulic system, electronic control and manipulate system components. Power system for cleaning the car to walk and water pumps provide motivation. Water system mainly by the high pressure pump, water tank, valve, nozzle and other components, water through the pump pressure can improve after to 8 MP, form high pressure jet spraying to road, effectively flush the sand dust. Hydraulic system mainly
by the hydraulic pump and motor and and valve t and other components, control vehicle to walk and injection action. Electric control part by nsors, SCM and main display control panel etc. In this paper the development of high pressure cleaning car main technical parameters are as follows:
The rating capacity; Engine output power 45 KW; The biggest water spray width is not less than 3 m; Spray work for vehicle speed 5 km/h; Spray water pressure is not less than 8 MP; Total number of nozzle 21; Water pump water largest amount 65
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多谢你2 power distribution and switching system
ntences是什么意思2.1 the basic principle of the power transmission and scheme lection
High pressure cleaning car according to the function of the realization of the divided into two kinds of state: a normal work is driving condition, high pressure cleaning the car and general at the same car, realize the transfer function; vehicle 2 it is watering operations state, the state in the vehicle with very low, the speed of the high pressure water spray homework, cleaning the road. Due to the high pressure cleaning the car need driving and driven two aspects of the pump power, so the dynamic how to provide design is to consider when the primary issue.
At home and abroad and usually u the power distribution solutions has two, one is to adopt double configuration of the engine power transmission system, is main engine vehicles not alter, transmission system will not do change, u a Taiwan independence in vehicles outside the system of power auxiliary engine drive hydraulic system for high pressure pump provide motivation.
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The advantages of this scheme is simple in structure, the price is low, the disadvantage is as the vehicle in the water spray work driving the speed, low speed less than 10 km/h, this time the main engine can't work in the best working point, that power allocation is not reasonable, can produce fuel
and power waste, and occupy the space of vice engine body, less the water storage volume, vice vehicle engine installation added new vibration noi sources, the influence the stability of the vehicle.
Another plan is to u the vehicle engine vehicle transmission system and hydraulic system provide the power, through the points with FenDongXiang action, in the transfer road, driven by the main engine FenDongXiang to driving axle differentials, high speed movement; vehicle In injection homework road, driven by the main engine FenDongXiang to hydraulic system, on the one hand, control operation speed, on the other hand, the drive pump water spray.
The scheme with the foregoing scheme, its advantage is compared, giving full play to the engine power, make the vehicle in the water spray operations can still working at high speed rating of the work of the state, not only save one engine, reduce the fuel consumption, and engine exhaust emission index is more advantageous to achieve urban environmental protection requirement. The vehicle structure more reasonable, vehicle weight of low, water storage space increas. To sum up, single engine configuration is a more reasonable configuration, so this paper power in the new, high pressure cleaning vehicle design, using a single engine design scheme.
2.2 power distribution
To ensure the high pressure pump provide of the injection pressure is constant, drive the hydraulic loop quantitative hydraulic pump must work in constant speed rating of the work of the state, water spray operations vehicle of the speed and the road of injection effect is also not to change about the amount of driving, so drive the variable pump will work in constant speed rating of the work of the state, the consumption of driving power also for tting value. Thus, when the engine power to homework for tting value.
2.3 new single axis FenDongXiang designagora
FenDongXiang power distribution is the core of the system, the traditional thought of design FenDongXiang usually adopts two to three axis structure of power distribution. This paper introduces the design of new light high-pressure cleaning vehicle USES the chassis is isuzu NKR55LLA light chassis, with traditional structure of the FenDongXiang sizes too large, can't meet the size requirement. According to the characteristics of the power distribution system, independent design and development of the single shaft driving, the FenDongXiang greatly reduced the FenDongXiang size, make body structure more compact.
3 hydraulic system
The hydraulic control system is watering operations every action when the key to meeting, and the main variable pump, the quantitative pump, the drive motors, hydraulic cylinder, cooler, integrated control valves piece, filter etc. From the function of the realization of the perspective, hydraulic system by hydraulic motor drive travel system and hydraulic pressure motor drive water spray system two
sub-systems.
3.1 hydraulic motor drive driving system
The variable pump, hydraulic motor and the corresponding hydraulic loop hydraulic subsystem, a walk for the system for oil pump, and quantitative pump coaxial connected. This system consists of integrated control valves to realize the control of hydraulic pump and hydraulic system. The variable pump and motor lection, according to the basic power to determine the value.
3.2 hydraulic motor drive water spray system
Hydraulic motor drive water spray system by quantitative pump, quantitative hydraulic motor, water pump, relief valve, cooler, filter and hydraulic cylinder and stacked valves group etc. For the hydrauli
c cylinder and stacked valves group together, for the control of water spray frame lift, extendable such action. The hydraulic oil tank, pass through to return to cooler water.
4 water injection system
The water system is high pressure cleaning the car mainly by the core part high pressure water pump, water spray nozzle, frame, the spray gun and valve etc. Water tank flow of water out of the pump will improve after water pressure to 8 MP, form high pressure jet spraying to the road. The high pressure pump rational lection of engine efficiency, the best utilization, best flush efficiency have important influence, need according to the design requirements and engine parameters, such as to determine the high-pressure pump power, speed and the parameters such as pump pressure at work. Water system design of the main problems including the following two aspects.
4.1 the telescopic multi-degree-of-freedom water spray frame
四级准考证丢了怎么办
Water spray frame is injection system of actuators, installed in high pressure cleaning car head, high pressure water spray nozzle in the frame. To increa the width of the jet wash, design the new hydraulic control expansion institutions. Work, install a nozzle two of the rear protruding from the front of the car, and the nozzle into a straight line, and the high pressure water jet to; After completio
n of work, back to the nozzle tube retract side. Water spray frame from ground level also controlled by hydraulic system, also designs of the mechanical structure, highly fine-tuning height adjustment to trace.
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4.2 water spray system parameters optimization
High pressure cleaning the car is the purpo of the quality of the road surface cleaning out clean, so, how to improve the cleaning effect, water conrvation is design to consider when important question, also is the past studies the problem of no point to consider. The effect of road surface cleaning and many parameters. Including injection height, the shape of the nozzle, injection pressure, injection Angle, jet width, nozzle diffusion Angle, distance of the nozzle. Through a lot of the theoretical and experimental rearch, to determine the height of the injection pressure injection, jet Angle, the width of the jet, the nozzle of the diffusion Angle of pavement, wash the best results, the wash rate in above, clean unit area of the pavement, the consumption of water and energy, reached the best matching value.橡皮擦英语怎么读
5 electronic control and operation system design
Electronic control system to realize the working state of the vehicle display, monitoring, alarm and co
touch怎么读英语怎么说ntrol etc. Function. Mainly includes the instrument shows system, dashboard, the hydraulic oil drive speed dial, hydraulic oil temperature display, hydraulic display, water tank water of the display and alarm, PenShuiGuan working status display, hydraulic system running time records, and other functions, the whole system USES modular design, the control panel integrated in driving indoor proper place, facilitate the operator control operation.
The water tank of the monitoring and forecast of electric control system is the important link, must be strictly controlled. Tank water after cooler for hydraulic oil
