Trees are the pillars of the majesty of life, and it takes hundreds of years to grow; the chain saw is a violent, hungry machine that can tip them to the ground in a matter of minutes. If it seems a crime to fall such a wonderful thing just for its wood, remember that trees usually die from the inside out and often become dangerous at the end of their lives. Sometimes fallen trees block roads or railways and need to be felled and cleared quickly: in emergencies and natural disasters, there is usually no more popular sound than the buzzing of a chainsaw. If you think custom chain saw are destructive and destructive, remember that they are very useful for daily forest management-used for thinning and clearing trees to ensure the overall, long-term health of the woodland habitat and the organisms living in it. What exactly is a custom chain saw and how does it work? Let's take a closer look!
The clue is in the name! The chain saw has two main parts: the saw blade built into the chain, wrapped around a long metal guide rod, and a small single-cylinder gasoline (gasoline) engine (sometimes an electric motor powered by a wire or battery pack). The chain is a bit like a bicycle chain, running around a sprocket (a gear designed to turn the chain), with only about 30 sharp teeth (made of hardened steel alloy) installed at intervals. Inside the engine, when the piston enters and exits the cylinder, it pushes the connecting rod to turn the crankshaft. The crankshaft rotates a gear connected (via a centrifugal clutch, as described below) to one of the sprockets on which the chain is mounted, and the chain rotates.
What happens inside the chainsaw?
A numbered artwork that shows the working principle of a chain saw in very simple terms.
Yes, roughly speaking, this is the role of a chain saw: From a scientific point of view, it converts the chemical energy locked in gasoline into mechanical energy that can be used for "work", turning a tree into a log, sawdust, Noise and heat. This is a very simple explanation:
The fuel you put in the chain saw tank contains in chemical form all the energy you consume when felling and felling logs. In order to maintain beauty and lightness, a typical chain saw fuel tank can only hold 0.5 liters (1.1 US liquid pints) of gasoline (the car’s fuel tank can hold 45-55 liters or 12-15 US liquid gallons, which is about 100 times that of).
The fuel is mixed with air through a carburetor.
The air-fuel mixture enters the cylinder, and its working principle is very similar to that of a cylinder in a car engine, but only a simple push-pull (two-stroke) action, rather than the more complicated (four-stroke) cycle used in a car. In the cylinder, the air-fuel mixture is ignited by the spark plug, burns, releases energy, and pushes the piston back and forth. The piston bore (diameter) in a chain saw engine is about 45 mm (1.75 inches), and the stroke (stroke) is about 33 mm (1.3 inches)-so it is less than half the size of a typical car engine piston and can only move half.
The connecting rod and crank convert the forward and backward motion of the piston into rotational motion.
The drive shaft provides power for the centrifugal clutch.
The Straight chain saw engine runs all the time, but unless you are actually cutting wood, you don’t want the chain to spin: it’s dangerous and wastes energy. The clutch solves this problem. As explained in more detail below, when the engine speed is high (when the operator pulls the throttle), the centrifugal clutch connects the engine to the chain, and when the engine speed is low (when the chain saw is idling), the chain stops rotating ).
The gear transmits power from the clutch to the sprocket of the fixed chain.
The chain revolves around the edge of a long steel plate called a guide bar, spitting out sawdust as it walks!