Classification and working principle of diesel generator combustion chamber(1) Formation of mixed gas
During the working process of the oil, the cooking and burning of the oil is completed in a very short period of time. If the rotation speed is 1500 and the rotation speed is 1500, the corresponding time is only .0030.00s. In order to complete the combustion and meet the emission standards in such a short period of time, there must be the zeroing of fuel, the movement of air and the close cooperation between the combustion chamber. The formation of the mixture can be divided into two stages , the first is the dispersion and evaporation of the evolving combustion engine in the injection, and then the mixture with air and air to form a mixture. The first stage mainly depends on the characteristics of the fuel supply, the distribution of the oil beam, and the zeroing of the spray bag These characteristics are determined by the structure and working conditions of the oil supply equipment, that is, the speed and pressure of the oil pump, and the movement state of the gas in the combustion chamber, that is, the diffuse flow, turbulence and convection of the air, and the combustion depends on the shape of the chamber.
(2) Combustion chamber
The combustion chamber is the place where the combustible mixture is formed and burned. The disturbance form and strength of the mixed flow of air and gas are largely determined by the structure of the burning treasure. Moreover, the shape and quality of the chemical or oil film also needs to be tested by the combustion chamber, because the structure of the combustion chamber determines the formation of the combustible gas mixture of the diesel generator and the condition of the combustion rods, and then the combustion of the combustion chamber. The performance of the engine has a direct and significant impact, especially the medium and high-speed engine. Combustion chambers of laughing oil generators are generally divided into two categories: direct injection combustion chambers and separate combustion chambers. The direct injection type can be divided into an open combustion chamber and a semi-open combustion chamber, and the partition type can be divided into a vortex type combustion chamber and a pre-chamber type combustion chamber.
1. Direct injection combustion chamber
The direct-injection combustion chamber is a general term for open combustion chambers and semi-open combustion chambers. This kind of combustion chamber is located on the piston body, and the fuel is directly injected into the combustion chamber by a multi-hole injector. It is relative to As far as the fuel in the separated firing chamber is not directly paid into the main firing chamber
(1) Open combustion chamber
The open combustion chamber is composed of a unified space composed of the bottom plane of the cylinder head, the top surface of the piston and the cylinder wall, as shown in Figure 1. Generally, there are shallow pits on the top of the piston. Figure 1(a) and (b) are shallow w-shaped combustion chambers. Figure 1 (d) (e) is a bathtub-shaped combustion chamber. Figures (c) and () only have extremely shallow pits , but Figure () has a flat bottom, and Figure () has a slanted bottom. The shape of the activity surface pit should match the shape of the oil jet sprayed by the injector. The characteristics of the open combustion chamber are as follows.