High-pressure control valve and low-pressure control valve to control the thermal and electrical load of the unit

There are few equipments to be operated and the operation is simple. When the 12MW generators produced in Austria are in normal operation, the main oil pump outlet oil pipeline supplies oil to the lubrication and regulation systems respectively. In the start-up and shutdown phases of the unit, the oil pipelines at the outlet of the AC oil pump are respectively supplied to the lubrication and speed control systems. In the state of the turbine, the fuel supply to the turbine speed control system is cut off by pressing the manual handle of the head side and stopping the mechanical handle, and the alternating oil pump only supplies the oil to the lubrication system and the disc brake device. When the domestic 12MW unit is in normal operation, the main oil pump outlet tubing supplies oil to the No. 1 and No. 2 fuel injectors and the speed control system, No. 1 fuel injector supplies fuel to the main oil pump inlet, and No. 2 fuel injector to the turbine oil system. Oil supply. During the start-up and shut-down phase of the unit, the high-pressure starting oil pump supplies oil to the turbine speed control system and the lubricating oil system. In the state of the turbine, the high-pressure starting pump should be stopped, and the AC lubricant pump should be started to supply oil to the lubrication system and the rolling device. There are fewer oil lines to be installed and the system layout is relatively simple. The main oil pump outlet of the 12MW steam turbine produced in Austria is divided into a power oil line and a lubricating oil line through a 517 orifice plate. The power oil switches the high-Pressure Control Valve and the low-pressure control valve to control the thermal and electric load of the unit under the control of the hydraulic pressure.

Domestic 12MW steam turbine speed control system oil pipeline is divided into pressure oil, a pulse oil, secondary pulse oil. The pressure oil switches the high-pressure control valve and the low-pressure rotating partition to control the thermal and electric load of the unit under the action of a pulsating hydraulic pressure and a secondary pulsating hydraulic pressure. Stable performance and higher manufacturing process The main oil pump of the 12MW turbine unit produced by Austria is a self-priming high-pressure oil pump. The AC oil pump is a high-pressure screw pump with a large output. Since the main oil pump is a self-priming oil pump, no other auxiliary equipment is required to supply oil to its inlet, and the output of the main oil pump and the AC oil pump are relatively large, which can meet the needs of the unit operation. The main oil pumps of domestic 12MW steam turbines are mostly radial centrifugal pumps. In order to ensure that the inlet oil pressure can make it work normally, one oil injector is generally designed to supply oil to its inlet.