机械毕业设计英文外文翻译386浅谈液化石油气半挂车设计新趋势对危运车辆行驶安全性能的影响

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Design of a new trend of LPG semi-trailer transport of dangerous safety performance of

vehicles

The liquefied gas tanker domestic production structure for the bicycle more fixed, because the restrictions by the carrying capacity of the chassis, can only reach its load capacity 10t. As in recent years, the amount of liquefied petroleum gas storage and transportation, the rapid increase in demand, particularly in improving the quality of road transport, small tonnage tanker transport capacity becomes low, high transport costs, this market for car transport tanker tonnage of cycling requirements grow. This paper introduces the structure of liquefied petroleum gas tank trailer features and design, through the tank stress calculation, strength check, and the axle load on the vehicle, driving stability, traction and climbing ability of the calculation, and running on prototype tests conducted to prove that the trend of the vehicle structure design. Through in-depth investigation and analysis, to grasp new trends in the design of LPG semi-trailer, concrete analysis of market segments in which the product, liquefied petroleum gas tank semi-trailer on the overall market supply and demand trends in the industry and industry prospects to judge since the state has promulgated to implement " road vehicles outside the profile dimensions, axle load limits and quality "(GB1589-2004) standards, the interpretation of a semi-trailer to reduce the total mass of liquefied gas, and strive to maximize tank volume tank to raise the maximum filling of semi-trailer containing a single volume, to meet customer everything possible to reduce per ton / km of running costs for the design of the mentality and needs of the guiding ideology of the revolution.

First, the latest design features of LPG semi-trailer.

When the series of 25 tons of domestic LPG semi-trailer loaded with 46 tons more than the total mass of the country reduced to the maximum limit of 40 tons, the previous semi-trailer designed for maximum filling volume decreased from the 24.6 tons to 22.3 tons, significantly reduced transport capacity of a single set about 10%, which means a corresponding increase in the cost of transport enterprises by 10% or so.Semi-trailer manufacturing company in order to enhance their market competitiveness, focusing on how the standard of strict compliance with existing GB1589, based on the optimal design, reduce curb weight semi-trailer, tank for tank and racked their mind to maximize volume;

on liquefied petroleum gas trailer for the structural transformation, including:

1. Tank and the connection between car beam, integral bar from the previous V-bearing, use only part of the running gear to ensure the connection with the short V-bearing; then gradually converted to cancel the V-bearing, the use of travel agencies car beam and bearing with integrated anti-T-composite structure of saddle connections;

2. Tank with hemispherical head instead of elliptical head

3. Individual manufacturers to give up the tank with improved rigidity and prevent deformation of the X-shaped anti-tank punch plate, back in the past two-tier board structure arc erosion control;

4. Reduce the number of stiffening ring inside the tank or sewage outlets to give up;

5. Give up the position of assisting the buttress in the legs;

6. Working with an emergency shut-off valve and ball valve integrated structure;

7. Continue using the successful experience of the past, according to the tank to calculate the minimum wall thickness, the choice of filter plates for cylinder and so on.

Second, the new analysis of the safety of design ideas

In fact, the tank used by the manufacturer transformation initiative is set to meet the user's largest single semi-trailer reached 23.6 tons filling the ideal requirements. However, everything must be viewed in two, as the inflammable and explosive dangerous goods transport vehicles, LPG semi-trailer manufacturing quality, the key is to ensure that its design is reasonable, driving stability and security and reliability. The following semi-trailer used in the process of discovery, as a result of traffic accidents caused by product quality and defects, which should be attached great importance to the tank manufacturer, and in pressure vessel quality assurance system to control operation:

1. over the past three years, China's liquefied gas tanker car manufacturing has been using

a V-bearing + Deck + bolt connecting structure, and solve the tank and the vehicle chassis (or travel agencies) the connection between the way the problem fixed. To reduce the trailer's cur

b weight, the current domesti

c sales of the larger manufacturers have a few semi-trailer running gear design an

d us

e o

f tank car bearin

g beam and the integration of anti-T-composite structure wit

h saddle connections. Tank manufacturers only need to hang on the tank provided by the manufacturer of the running gear frame, through the assembly, calibration, welding, the tank and the connection between the vehicle running gear fixed on the basic process to complete. I am nearly similar according to the structure of LPG vehicles, semi-trailer tracking product quality, the following design and manufacturing production plant critical control point is overlooked by quality assurance system: