(1) All components of the integral crankshaft are an inseparable whole. The utility model has the advantages of simple structure, easy processing, small quality, low cost and reliable work. At present, it is widely used in small and medium-sized internal combustion engines (such as WD615 series, NT/NTA855 and other diesel engines).
(2) The components of the combined crankshaft are manufactured separately and then assembled into a unitary body. The advantage is that the spindle journal can adopt rolling bearing, the friction resistance is small, and a certain component can be replaced after being damaged,
As for the scrapping of the entire crankshaft. However, its structure is complex, processing precision is high, and cost is quotient.
The crankshaft is supported on the crankcase by the main journal, and can be divided into full-support and non-full-support depending on the form of support.
A crankshaft with a main journal between adjacent cranks is called a fully supported crankshaft, otherwise it is called a non-fully supported crankshaft.
The fully supported crankshaft of the diesel generator is characterized by one more spindle than the number of cylinders and good rigidity, but the overall crankshaft size is long (such as NT/NTA855 and WD615 series diesel engines). The non-fully supported crankshaft is characterized by a smaller number of spindle necks than the number of cylinders, a simple structure, a short total crankshaft length, but poor rigidity.
Mini Co2 Laser Engraving Cutting Machine
Mini Co2 Laser Engraving Cutting Machine. The machine is a kind of Laser Engraving Machine System equipped with CO2 laser Tube, it is used to engrave on wood, bamboo, plexiglass, crystal, leather, rubber, marble, ceramics and glass and etc. It is most suitable and the preferred choice of equipments in industries such as advertisement, gifts, shoes,toys and etc. It supports multiple graphic formats, such as HPGL, BMP, GIF, JPG, JPEG, DXF, DST, AI and so on.
This machine is equipped with DSP Control System for RDdraw directly,also supports CoreDraw and Auto CAD and other advance software. It must connect with computer with USB cable when you change the settings of machine for the design files,you can transfer the file with USB memory stick to the machine, or can download it to the machine directly with USB cable from computer. Even on the same Job, you can do setting with different colour in the software and also can making holes.And it can the legs separate from the main body of the machine. The machine has doors which can be opened to accommodate larger materials.
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