The concept of diesel generators and test methods

 Modern diesel generator set diesel engine, three-phase AC brushless synchronous generator, control box (screen), cooling water tank, coupling, fuel tank, muffler and other components of public base steel as a whole. The engine flywheel and the generator uses the front cover of the axial positioning of the direct connection convex form one shoulder, and the use of cylinder-type flexible coupling from the generator directly driven flywheel rotates its way connected together by a screw, so that the two are connected into a steel body, to ensure the engine's crankshaft and generator rotor concentricity within the specified range. 

  Diesel generators and synchronous generators by a combination of internal combustion engine, the engine maximum power by parts of mechanical load and thermal load limits, known as the rated power, AC synchronous generator rated power is the rated speed, long-term continuous operation, the output power rating, usually diesel engine rated power output of the alternator output and synchronization between the rated power, called matching ratio. 

1 Overview 

  Diesel generator set is a small power generation equipment, means the diesel fuel to diesel engines as prime mover drivengenerator to power machinery. General by the diesel engine diesel generator, generator, control box, fuel tank, starting with the storage battery and control, protection, emergency cabinet and other components. Can be fixed based on the overall positioning using, also mounted on a trailer for mobile use. 

  Diesel generator sets are non-continuous operation of power generation equipment, continuous operation if more than 12h, the output will be lower than the rated power of about 90%. 

  Although lower diesel generator power, but because of its small size, flexible, lightweight, fully furnished, easy to operate and maintain, it is widely used in mining, railways, field site, road maintenance, as well as factories, businesses, hospitals and other departments as a temporary backup power supply or power. In recent years, newly developed unmanned automatic emergency power plants, more kinds of generating units to expand the scope of use. 

  At present, China has a production capacity of export production plant in Tianjin more than 10 plants and other power equipment. Products are exported to Europe, Asia and dozens of countries and regions, well received. 

2 Classification and specifications 

  Diesel generator sets to the size of the generator output power to classify units of energy from 10kW-750kW variety of specifications. Each specification is divided into a protective type (with super-speed, high temperature, low oil pressure protection device), emergency-type and several structure-based mobile station. Which mobile station is divided into speed and vehicle speed can match the high-speed and low-speed off-road type of ordinary mobile type. 

3 Order Notes 

  Diesel generator set export inspection is based on contract or technical agreement on technical or economic indicators can be tested, the user in the selection and signing, should note the following: 

(1) If the environmental conditions and calibration of diesel generator sets the value of a gap when the environmental conditions should be described in the contract when the temperature, humidity and altitude values, in order to provide appropriate models and equipment; 

(2) Description taken in the cooling mode, in particular, large capacity units, should pay attention; 

(3) When ordering, in addition to illustrate the unit model, but also shows selection of the model; 

(4) diesel engine group voltage regulation rate of 1%, 2%, 2.5% of the rated voltage. Choose what should description; 

(5) normal delivery, provide a certain amount of wear parts, while necessary, should be described. 

4 test items and methods 

  Department of diesel generator sets of products, including diesel engines, generators, control components, protection devices. Exports of machine inspection, including the following: 

(1) product technology, test data review; 

(2) Product specifications, models, mainly structural dimensions; 

(3) the overall appearance of the product quality; 

(4) Unit Performance: The main indicators of technical parameters, plant operation flexibility, the reliability of automatic protection devices, sensitivity; 

(5) the contract or technical agreement of the other projects.