目前国内生产的400马力冷再生机，可以对沥青路面灰土路基进行冷再生作业，还可以当路拌机用。国外主流厂家早已不再生产类似功率的专用路拌机，取而代之的是路面冷再生机，除了路面路基冷再生施工，其使用范围还包括了传统的路拌机应用范围，而且施工效率大大高于传统的路拌机。对照国外的经验，功率为400马力的小冷再生机(相对600马力的冷再生机》，将会逐步代替国内的传统后置路拌机。冷再生机比传统的后罡转子路拌机施工质量稳定，这得益于冷再生机的结构特点（铣刨转子在两桥中间)，但国内生产的大多数400马力冷再生机与后墨转子路拌相比，工作速度却不占优势。生产的WR2100L路面冷再生机，在实际应用中，利用可换挡的双转速转子，有着普通路拌无法比拟的优势，工作时可以速度更快,拌和效果可调，混合料可以打的更细。

The 400 horsepower cold regeneration machine currently produced in China can perform cold regeneration operations on asphalt pavement and lime soil subgrade, and can also be used as a road mixer. Mainstream foreign manufacturers no longer produce specialized road mixers with similar power, but have replaced them with road surface cold recycling machines. In addition to road surface and roadbed cold recycling construction, their scope of use also includes the application range of traditional road mixers, and the construction efficiency is much higher than that of traditional road mixers. Comparing with foreign experience, a small cold regeneration machine with a power of 400 horsepower (compared to a cold regeneration machine with a power of 600 horsepower) will gradually replace the traditional rear mounted road mixer in China. The construction quality of the cold regeneration machine is more stable than that of the traditional rear rotor road mixer, thanks to the structural characteristics of the cold regeneration machine (the milling rotor is in the middle of the two bridges). However, most domestically produced 400 horsepower cold regeneration machines do not have an advantage in working speed compared to the rear ink rotor road mixer. The WR2100L road cold regeneration machine produced has advantages in practical applications that ordinary road mixers cannot compare to, utilizing a shift able dual speed rotor. It can work at a faster speed, with adjustable mixing effects, and the mixture can be made finer.

国内的路拌机拌和转子的转速往往只有一种，如果有厂家说转速可调，那是调整液压泵的输出排量，通过减小泵的排量来降低转子转速，实际同时也降低了输出功率，降低了机器的工作效率，没有实际意义，所以没有操作司机会降低转子转速干活。还有厂家说行走有两个挡，这和转子工作挡是两个概念，目前国内所有厂家生产的路拌机都有两个行走工作挡。生产的WR210OL沥青路面冷再生机铣刨有两个转子工作挡，两挡转速各有一个转速，这两个转速是全功率的双转速。在实际应用中，许多用户已体会到双转速的优点来。举两个实际例子。

There is often only one type of speed for the mixing rotor of domestic road mixers. If a manufacturer claims that the speed is adjustable, it is to adjust the output displacement of the hydraulic pump and reduce the rotor speed by reducing the pump displacement. In fact, it also reduces the output power and reduces the efficiency of the machine, which has no practical significance. Therefore, without operating the driver, the rotor speed will be reduced to work. Some manufacturers also say that there are two gears for walking, which is a different concept from the rotor working gear. Currently, all road mixers produced by domestic manufacturers have two walking working gears. The WR210OL asphalt pavement cold recycling machine produced has two rotor working gears, each with a maximum speed. These two speeds are full power dual speeds. In practical applications, many users have realized the advantages of dual speed. Give two practical examples.

在灰土拌和实际应用中，机主一般都是采用一档工作，机器有劲，工作速度快，损耗还小，工作速度明显比路拌要快很多。

In the practical application of lime soil mixing, the machine owner generally uses first gear operation. The machine is powerful, operates at a fast speed, and has low losses. The working speed is significantly faster than road mixing.

在冷再生机的本行—―沥青路面冷再生施工中，也可灵活选择工作档位，工作面较硬时，用一档，明显比其它400马力冷再生机速度更快，破碎粒度也能达到要求，若工作面较软，用二档，高转速，可以将成品料打得很细，比其它400马力冷再生机破碎料度更小。灵活的应用，全在现场掌握。转子转速增加档位，整机的成本增加了，但带来的效益却远远高于增加的成本。在研发各型机器时，一直把机器性能放在首位，而将成本放在次要的位置上，在机器技术性能上做国内的先行者。

In the field of cold recycling machine - asphalt pavement cold recycling construction, the working gear can also be flexibly selected. When the working surface is hard, using the first gear is significantly faster than other 400 horsepower cold recycling machines, and the crushing particle size can also meet the requirements. If the working surface is soft, using the second gear and high speed can finely crush the finished material, which is smaller than the crushing particle size of other 400 horsepower cold recycling machines. Flexible applications can be mastered on-site. The increase in rotor speed and gear increases the cost of the entire machine, but the benefits it brings far exceed the increased cost. When developing various types of machines, we have always prioritized machine performance and placed cost in a secondary position, leading the way in terms of machine technical performance in China.

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