I have a choice to buy bearing for electrical motor 1500 RPM with brass cage or polyamid cage.
1) 7322 BECBM Angular Contact ball bearing single row "Brass Cage".
2) 7322 BECBP Angular Contact ball bearing Single row "Polyamide Cage".
What is the criteria I need to consider? I appreciate your...
I'm not sure if it is the right forum to address my question. We have GE 9E frame gas tubines and as scheduled overhaul is on the horizon we are planning the jobs to be done. We suspect that misalignment is high between Gas turbine and generator bearings. We'd like to check it using laser...
Hi,
I use to ISO standard to assess severaty of vibration on equipment. But Flowserve pumps manual refer to VDI 2056. I have never seen this standard. They set vibration alarm on 9 mm/sec and trip level on 12 mm/sec. These values seem very high to me. In steady operation bearing vibration on...
We have three vertical pumps installed on cooling tower. Pumps are supplied by Flowserve. During commissioning we faced a problem with tripping on high vibration during start-up. We have measured on natural frequency on the casing of the pump and motor (bump test). It is 5.41 Hz whereas the...
We are on commissioning of GE frame 9E gas turbine and facing problem with high vibration. Can anybody tell me what is the acceptible level of vibration for this machine? During shut down it has 7.9 mm/sec on third critical speed. On base load I see max displacement 80-90 mic/pp on bearing #1 at...
I work in the construction of Combined Cycle Power plant. We have two suppliers of natural gas and our gas pipeline consists of 24' main line and two 16' branches from suppliers and one 16' branch to our facility. Our EPC contractors are going to pig only main line and blow out the branches by 7...
Hi,
Can anybody help me find information about CEM, continuos particles control system (NOx)for combined cycle power plant working on natural gas?
thanks
Preparing a presentation I came across contradictory information about Variable O&M costs of Various Power plants (Costs of Nuclear, Gas Turbine, Combined cycle, Steam turbine (Coal) and diesel power plants were compared). The variable cost for CC Power plant is 3.8 US$/MWh in accordance of one...
