The lubricating oil main pump 70LY-34X2-1B is a cooling lubricating oil pump for the steam turbine main shaft, installed on the turbine rotor in the front bearing seat, directly driven by the turbine main shaft, and rigidly connected to the turbine main shaft. Due to the fact that this driving method of the main oil pump can utilize the kinetic energy of the rotor to supply oil to the bearings during inertia, it is the most reliable. It has a large capacity and stable outlet pressure. When operating at or near the rated speed, the 70LY-34X2-1B main oil pump can supply all the oil required for the lubricating oil system. In addition, it also provides a backup oil source for the generator sealing oil system. The main oil pump cannot absorb oil on its own and must continuously supply pressure oil.

The lube oil pump 70LY-34X2-1B of the steam turbine is used to supply oil, lubricate, and cool the bearings of the unit. Provide stable and sufficient pressure oil for the speed control system and protection devices. The main oil pump is one of the important auxiliary components of the steam turbine, installed inside the front box of the unit, and provides all lubricating oil and security oil for the unit at full speed. During the startup and shutdown of the steam turbine, the lubricating oil and security oil of the unit are provided by the auxiliary AC lubricating oil pump and the high-pressure starting oil pump. The use of the main oil pump can not only save plant power, but also prevent the risk of oil interruption and tile burning due to the power outage of the AC lubrication pump.

Yoyik can offer many spare parts for power plants as below:
Emergency Pump Coupling Cushion HSNH80Q-46NZ
Jacking Oil System A10VS0100DFLR/31RVPA12NOO
Pump Skeleton Oil Seal 70LY-34×2-1B
Circulating Oil Pump DLXB850-R67
EH Oil Cooling Pump SDV-20-F3
Hydraulic Pump Hose PVH131Q1C.RSF.10.C25
Screw Transfer Pump NSNF210-40
Pump Shaft Seal F3V10IS6SIC20
Piston Suction Pump 25SCY14-1B JB/T7043
Pump OIL DOUBLE LIP SEAL 02-334632
Emergency Pump HSNH4400Z-46NZ
EH Recirculating Oil Pump F3V10IS6SIC20
DC Sealing Oil Pump Bushing DLXB820-R67
Hydraulic System PVH74 (QI)C-RM-IS-10-C14
Main Oil Pump Oil Seal HSND280-46
Piston Pump Repair Kit PVH074R01AB10A250000002001AE10A