120kw weichai diesel generator 6 cylinder water cooling genset

The diesel generator set is carefully designed by introducing foreign low-noise generator and engine technology; the design concept is advanced and the variety is complete. The cabinets are all detachable structures. The cabinets are made of steel plates spliced ​​together. The surface is coated with high-performance anti-rust paint, and has noise reduction and rainproof functions. Large impedance muffler. At the same time, there is an observation window and a unit emergency stop fault button on the box, so as to observe the operation of the unit and stop the fault button at a fast speed when the unit is in an emergency, so that the operation of the unit and the emergency Quick shutdown to avoid damage to the unit.

Because most generators are coaxially linked with the prime mover, thermal power plants use high-speed steam turbines as prime movers, so turbo-generators usually use high-speed 2-pole motors with a speed of 3000 rpm (at a grid frequency of 60 Hz). 3600 rpm). Nuclear power plants mostly use 4-pole motors with a speed of 1500 rpm (when the grid frequency is 60 Hz, it is 1800 rpm). In order to meet the high-speed and high-power requirements, the high-speed synchronous generator adopts a hidden-pole rotor in structure, and secondly, a special cooling system is set up.

①Concealed-pole rotor: the appearance is cylindrical, the surface of the cylinder is slotted to place the DC excitation winding, and it is fastened with metal slot wedges to make the motor have a uniform air gap. Due to the huge centrifugal force during high-speed rotation, the rotor is required to have high mechanical strength. Concealed pole rotors are generally forged from high-strength alloy steel in one piece, and the slot shape is generally open, so that the excitation winding can be installed. About 1/3 of each pole pitch is not slotted, forming large teeth; the rest of the teeth are narrower, called small teeth. The center of the large tooth is the center of the rotor pole. Sometimes the large teeth also open some smaller ventilation slots, but the windings are not embedded; sometimes a narrow and shallow small slot is milled at the bottom of the embedding slot as a ventilation slot. The hidden pole rotor is also equipped with metal guard rings and center rings at both ends of the rotor body in the axial direction. The retaining ring is a thick-walled cylinder made of high-strength alloy to protect the end of the excitation winding from being thrown out by huge centrifugal force; the center ring is used to prevent the axial movement of the winding end and support the retaining ring. In addition, in order to pass the excitation current into the excitation winding, a collector ring and a brush are also installed on the motor shaft.