QNP provides you with all-round unit maintenance and overhaul services professionally, as well as upgrading and transforming services for old units. At the same time, QNP also provides customers with long-term training and commissioning services, and can make maintenance and overhaul plans , implement one-to-one service, and directly provide lifelong service to users according to their requirements.
QNP provides design, renovation and upgrading, maintenance, overhaul, spare parts supply and other services for steam turbine generator units below 1000MW.
QNP has various high-precision equipment such as CNC heavy horizontal lathe, CNC vertical lathe, large CNC boring machine, Mitsubishi high-precision gantry machining center etc., which can undertake the machining business of machine units below 1000MW.
Steam turbine overhaul
The overhaul contents include the common and difficult faults including steam turbine parts supply, steam turbine installation, overhaul, technical transformation, project general contracting, steam turbine accident treatment, steam turbine technical training, steam turbine low lubricating oil pressure transformation, repair of steam turbine rotor shaft bending, reduction of vibration and noise of steam turbine units, elimination of abnormal fluctuation and load swing of speed regulation system, and solution of insufficient steam turbine output and load etc.
Unit maintenance process
Customer information provision→on-site inspection→issue overhaul plan→prepare overhaul process→equipment disassembly and assembly inspection and repair→installation inspection→commissioning and acceptance
Overhaul of steam turbine generator
Generator stator and rotor coil inspection, rotor fastening inspection, insulation material or insulation part loss inspection, rotor runout inspection, stator air tightness inspection, hydrogen (air) cooler inspection, generator test, etc.
Unit overhaul process:
Customer information provision→on-site inspection→issue overhaul plan→prepare overhaul process→equipment disassembly and assembly inspection and repair→installation inspection→commissioning and acceptance
Overhaul of speed regulation system
a, speed regulation, security system
b. Main stop valve
c. Oil system
Overhaul and test of electrical system
The safe operation of electrical equipment of steam turbine generator set is related to the safety of electricity consumption. The preventive test regulations of power equipment clearly put forward the test contents and cycles of various power equipment to avoid the occurrence of power faults to the greatest extent.
Generator is the "heart" of power system, and its safe operation will directly affect the stability of power system and the quality of electric energy. The mechanical structure of the generator itself is complex, and there are huge auxiliary equipment, which makes the condition that the failure of any component of the generator system may lead to the whole system stopping operation.
As a designer and manufacturer of generator and electrical cabinet, QNP has rich experience to deal with various electrical failures, and can undertake a variety of test projects.