As early gear oil pumps are all hydraulic, due to the need of environmental protection and energy saving, as well as the mature application of servo motor and the sharp drop in price, in recent years, there are more and more all-electric precision gear oil pumps. In order to analyze this development trend, I will list the comparative characteristics of this:
. Although China's hai Tai, Donghua and other plastic machine enterprises have launched their own development of the all-electric injection machine, but the technical reliability of their products still need to be tested by the market.
1, all-electric stainless steel gear pump has a series of advantages, especially in environmental protection and energy saving advantages, it is reported that the current more advanced all-electric gear pump power saving can reach 70%, in addition, due to the use of servo motor injection control precision is higher, the speed is more stable, but also can be multi-level adjustment. However, the service life of the all-electric gear oil pump is not as good as that of the all-hydraulic gear oil pump, and the servo valve with closed-loop control must be used to ensure the accuracy of the all-hydraulic gear oil pump, and the servo valve is expensive, bringing the cost rise. All-electric injection machine has inherent advantages in energy saving effect, but as mentioned above, the manufacturing cost of this type of machine is high, resulting in its application scope is greatly limited; At the same time, its technology is difficult to develop, and at present the field is almost monopolized by Japanese enterprises.
With the development of society, the increase of population, the continuous improvement of people's living standards, now people are enjoying the fun of life more and more, but this development has brought great pressure to China's energy, so energy saving has left a deep impression on our hearts, and we are looking for sustainable development.
In the cost composition of injection molding products, electricity accounts for a considerable proportion. According to the demand of oil pump equipment process, the power consumption of gear oil pump oil pump motor accounts for up to 50%-65% of the power consumption of the whole equipment, so it has great energy saving potential.
2, electric-hydraulic gear oil pump is a new type of gear oil pump set hydraulic and electric drive in one, it integrates the high performance of the full hydraulic gear oil pump and the energy-saving advantages of the full electric, this electric-hydraulic combined compound gear oil pump has become the development direction of gear oil pump technology. The introduction of energy-saving technology in the general injection machine to develop energy-saving injection machine, which is also the current international and domestic injection machine technology development important trend. The author thinks: inside short time, homebred whole electric model machine and Japanese equipment contend with each other hard.
3, full hydraulic gear pump in the aspect of forming precision, shape of complex products has many unique advantages, it is from the traditional single cylinder liquid type, multi-cylinder liquid type development to the present two plate straight pressure type, of which two plate direct pressure type is the most representative, but its difficult to control technology, high machining precision, hydraulic technology is also difficult to master. This kind of technology mainly has the frequency conversion energy-saving type, the variable pump energy-saving type and the servo control energy-saving type, the energy-saving effect can also reach the range of 30 ~ 70%.
