Dynamic compaction method is widely used in foundation pretreatment of airports and factories because of its high energy and low cost. However, not all dynamic compaction machines can be used in plateau areas, because the standard dynamic compaction machine can only be used within 2000m altitude and the temperature is - 10 ℃ ~ 40 ℃. If the altitude is too high, it will also have plateau reaction like us. How to solve this problem and ensure the high attendance rate of equipment, today I'll discuss with you:
1、 Power system: it is the power source of our whole vehicle. With the increase of altitude, the air density decreases, the useful output power of the engine decreases and the heat dissipation power increases. Therefore, for plateau construction vehicles, we should mainly focus on the following aspects:
1. Evaluate whether the power of the engine meets the requirements of the main hydraulic pump, and adjust the power of the main pump in time to avoid holding the engine due to excessive load;
2. Increase the opening pressure of the pressure cover of the water tank (it is recommended that the opening pressure be at least 1.1kpa), avoid the low-temperature boiling of the coolant, which will affect the heat dissipation, and re evaluate and adjust the heat dissipation system according to the service conditions;
3. According to the local low temperature conditions, timely replace the coolant, fuel and oil of corresponding specifications or install the engine cold start device to avoid the freezing crack of the water tank and ensure the normal start of the engine under low temperature environment.
2、 Hydraulic system: it is the "blood circulation system" of our whole vehicle. Due to the low ambient temperature in plateau areas, the 46# hydraulic oil normally configured does not meet the use requirements, which is easy to cause the wear of main hydraulic components pumps and motors and shorten their service life under low temperature conditions due to poor fluidity and inadequate lubrication of hydraulic oil. Therefore, it is necessary to select the appropriate brand of anti-wear hydraulic oil according to the ambient temperature. In addition, in order to prevent the hydraulic oil tank from being empty, it is necessary to replace the hydraulic oil tank air filter with a manual exhaust preloading air filter.
3、 Lubrication system: it is the guarantee for long-term and reliable operation of equipment, including engine lubrication system and reducer lubrication. A good equipment is inseparable from careful care and maintenance in the later stage, and the selection of lubricating oil is particularly important. It is necessary to select not only regular channel oil, but also appropriate lubricating oil brand according to temperature conditions, In order to effectively protect the lubricated parts.