What is the function of a jacking pump in a steam turbine?

The function of a jacking pump in a steam turbine is to allow oil to circulate prior to rotation. This circulation of oil is critical for lubricating the bearings and other moving parts of the turbine before it starts operating at full speed. The jacking pump provides pressurized oil to the system, creating a film of lubrication that reduces wear and heat generation when the turbine begins to rotate. By ensuring that the bearings are well-lubricated from the start, the jacking pump helps to prevent damage that could occur from friction in the beginning stages of operation, where metal surfaces might come into contact without adequate lubrication. Thus, the jacking pump plays a vital role in the overall reliability and efficiency of steam turbine operation.