The development direction of bulldozer
3. Application of windproof sand technologyBecause the western area of sand is relatively large, if the air filter in general, extremely easy to cause the air filter clogging or filtering is not sufficient, damage the parts of diesel engine. The diesel engine manufacturers usually use three stage filter or four stage filter to solve this problem.4, self-help protective equipment and machinery configurationDue to the traffic inconvenience and sparsely populated areas in the western plateau. Therefore, the hydraulic winches should be installed so that they can be pulled out when they are trapped in bunkers or marshes. At the same time, due to the large temperature difference in the western region and windy sand, the cab should improve the sealing performance, and equipped with warm and cold air conditioning, anti ultraviolet glass. The driving room shall be equipped with necessary living facilities, as well as edible water and food storage cabinets. It should even be equipped with global positioning systems and small oxygen plants.5. Adoption of low temperature preheating systemIn order to improve mechanical cold starting performance. In addition to the high-performance maintenance free battery, the use of diesel engine cooling system preheating or oil tank preheating technology is also two effective methods. These two technologies are especially applicable to alpine regions with temperatures lower than -35 degrees celsius.Development and application of 6 and multi degree of soil pushing deviceWith the construction of urban construction facilities increasing and the need of irrigation and water conservancy construction, the development and application of multi degree of freedom soil pushing device should be improved gradually.
Two, the western plateau area operationsThe key technologies to adapt to the operation in the western plateau area are to be improved and solved as soon as possible1. Adopt the power recovery technologyAs a general natural aspirated engine, when the altitude is increased by 1000m, its output power will be reduced by 8~12%. When the height of the whole machine is 4000m, the output power is only about 55% of the plain area. So the west plateau in the construction of bulldozer must use this power recovery type turbocharger technology, in order to make use of the diesel engine in the plateau region, to restore its output power and economic indicators and the heat load index to the calibration level of the original low altitude area of the east. The diesel engine supporting factories of the national bulldozers, such as Shanghai diesel engine factory, Weifang diesel engine factory and Chongqing Cummins diesel engine company, have done a lot of work, and have basically met the needs of the market.2. Heat balance technologyConstruction machinery in the western high pressure area construction, to solve the hydraulic system cooling problems. It is necessary to solve the problem of increasing heat load due to supercharging of diesel engine, and also to solve the higher temperature rise caused by the decrease of heat radiation capacity of the transmission cooling system over the eastern low elevation area. In the calculation of thermal balance, the cooling air volume, air temperature, environmental temperature difference, radiator heat dissipation and other factors should be taken into account.
First, the development of small bulldozersIn addition to the highway construction needs large and medium horsepower bulldozer, the construction of county and township roads network of high grade highway construction and water conservancy engineering, environmental engineering construction, it is bound to create individual construction in large quantities. Thus, the demand for small bulldozers (under 100 horsepower) is bound to increase. At the same time, China has built highways and highway has gradually entered the maintenance period, with the economic development of the eastern coastal areas and the improvement of people's living standard, small bulldozer will gradually become a substitute manual tools. This is where the market for small bulldozers is.Compared with the North American, Western European and Japanese markets, the Chinese small bulldozer market has a considerable gap, both in sales volume and in the proportion of total sales of small bulldozers and heavy bulldozers. The bulldozer industry must take advantage of this opportunity to meet the needs of this new market. According to the magazine introduced, the minicomputer market has entered the growth period, 2008-2012 years before and after entering the late growth period and mature period, and around 2020 into the mature period.Therefore, the enterprises concerned in the bulldozer industry should focus on the strategic point of view and must never ignore the future market of small products. However, in developing countries such as China, the development of small construction machinery products must be accurate. Different technologies and different user groups should be used to solve the positioning problem. Should first develop to meet the developed areas of the vast rural market low-end products. And high-end products, more should consider the needs of future users.
