In the process of realizing the conversion of heat ener […]
In the process of realizing the conversion of heat energy into mechanical energy, the crawler transporter must first suck air into the cylinder, then compress the air in the cylinder to generate high temperature, and then inject diesel fuel to self-ignite and burn (thermal energy) under high temperature conditions to make the cylinder inside The heated gas expands to produce greater cylinder pressure, which pushes the piston to do work (mechanical energy), and finally discharges the burned exhaust gas out of the cylinder. This process is called intake stroke, compression stroke, power stroke and exhaust stroke. Completing these four trips in sequence is a working cycle of a four-stroke crawler transporter.
Crawler trucks are burning to work on this journey, which is similar to the principle of projectile launching. They all use the force of gas to expand when the fuel is burned to generate high temperature to perform work, and the projectile is launched under the pressure of gas expansion. However, the working conditions of the two are different. The shells are fired in stages, while the crawler truck needs to work in cycles at high speed. In order for the crawler truck to work in high-speed cycles, two major mechanisms (crank connecting rod mechanism and air valve mechanism) and three major systems (supply system, lubrication system and cooling system) are required to work together.
First, a crank connecting rod is needed to connect the linear motion of the piston and the rotary motion of the crankshaft with a connecting rod. In this way, the linear motion of the piston can be turned into a rotary motion by pushing the crankshaft to rotate through the connecting rod. When the inertial force of the crankshaft rotates to drive the piston down, the clean air provided by the air distribution system is sucked into the cylinder. In order for the piston to move upwards to have enough inertial force to compress the air in the cylinder during the compression stroke, a flywheel must be equipped on the crankshaft. The main function of the flywheel is to store part of the energy when the piston is working, and use the inertia The form of force releases energy to help the piston move up the compressed gas, creating high-temperature and high-pressure combustion conditions for the stroke of work. In this way, during the power stroke, the fuel supply system provides high-pressure diesel injection 6K... which can burn quickly, so that the gas in the cylinder is heated and expanded to push the piston down, and the crankshaft is rotated through the connecting rod.
Then the crawler transporter uses the inertial force to push the piston upward to discharge the combusted exhaust gas out of the cylinder. In this way, the crawler transporter can continuously cycle work, which can be seen by the crank connecting rod mechanism.