Diesel generator set concept and its inspection method

Diesel generator setsA type of a self-supplied power plant is a small independent power generation equipment, powered by internal combustion engines, driving synchronous alternating generators.

Modern diesel generator set consists of diesel engine, three-phase AC brushless synchronous generator, control box (screen), heat dissipation tank, coupling, fuel tank, muffler, and common base, etc. The axial direction of the diesel engine is integrated with the axial direction of the front end cover of the generator, and the cylindrical elastic coupling is used by the flywheel directly drives the rotation of the generator, and the coupling method is fixed by the screw, so that two The couples are coupled into a steel body to ensure that the crankshaft of the diesel engine and the concentricity of the generator rotor are within the prescribed range.

The diesel generator is combined by the internal combustion engine and the synchronous generator. The power of the internal combustion engine is limited by the mechanical load and heat load of the components, referred to as rated power, and the rated power of the AC synchronous generator refers to the rated speed, long-term When running continuously, the rated power output is typically between the rated power of the diesel output, and the rated power output from the synchronous alternator is called a match ratio.

Diesel generator sets
1 Overview
Diesel generator is a small power generation equipment that refers to diesel oil or the like, with a diesel engine to drive generator power generation power machine. Diesel generator sets are generally composed of diesel engine, generators, control boxes, fuel tanks, boots, and control, protective devices, emergency cabinets, etc. The whole can be fixed based on the position, and can also be installed on the trailer for mobile.
The diesel generator set is a non-continuous operation of the power generation equipment. If the continuous operation exceeds 12 h, the output power will be lower than the rated power of about 90%.
Although the power of the diesel generator set is low, it is widely used in mining, railway, field construction sites, road traffic maintenance, and factories, corporate, hospitals, etc. due to small power, flexible, lightweight, fully equipped, easy to operate and maintain. As a spare power or a temporary power supply. In recent years, the newly developed unattended automatic emergency power station has been more expanded in the range of use of the generator set.
At present, there are more than 10 manufacturing factories with export production capacity in my country. Products are exported to Eurasianfid Country and regions, which are well received.
2. Classification and specifications
The diesel generator group classifies the size of the generator output power, and the unit energy ranges from 10kW-750KW. Each specification is also protected (equipped with ultra-rotational speed, high water temperature, low hydraulic protection device), emergency and mobile power station type. Among them, the mobile power station is also divided into high-speed cross-country and high-speed cross-country and low-speed moving types that can match the speed of speed.
3. Order consideration
Export inspection of diesel generator sets is based on related techniques or economic indicators of the contract or technical agreement. When users choose and sign, they should pay attention to the following points:
(1) If the environmental condition is used with the environmental condition value of the diesel generator set, the temperature, humidity and altitude values ​​should be described when signing the contract to provide suitable models and supporting equipment;
(2) Describe the cooling method taken in use, especially large-capacity units, more attention;
(3) When ordering, in addition to explaining the model model, it is necessary to explain what models are selected;
(4) The voltage adjustment rate of the diesel engine group has 1%, 2%, and 2.5% rated voltage. What kind of use, it should also be explained;
(5) When the normal supply is provided, a certain amount of easy-to-tube is provided, and it is also necessary to explain it.
4. Test items and methods
Diesel generator sets complete sets of products, including diesel engines, generators, control components, protective devices, and the like. The whole machine test of export products, including the following:
(1) The technical and inspection data review of the product;
(2) Specifications, model, main structural dimensions of products;
(3) The overall appearance quality of the product;
(4) Unit performance: Main technical parameters indicators, unit operation adaptability, reliability, sensitivity of various automatic protection devices;
(5) Other items specified in the contract or technical agreement.