No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
The effects of vibration can be severe. Unchecked machine vibration can accelerate rates of wear (i.e. reduce bearing life) and damage equipment. Vibrating machinery can create noise, cause safety problems and lead to degradation in plant working conditions. Vibration can cause machinery to consume excessive power and may damage product quality.
The maintenance scheduling problem is a combinatorial optimization problem. Many traditional techniques have proved to be fruitful in maintenance optimization problems. The use of Max to Min and Min to Max heuristics has been proposed for solving preventive maintenance problems and their performances are compared [1]. The use of
some problem has arisen, but much before the possible break-down. The maintenance activity is directed towards curing a particular problem. 3. RELATIONS BETWEEN LOAD AND arrangements are provided. The main driving shaft S6 VIBRATION RESPONSE (A PROPOSED provides the power to other two driven roller shafts S7 and THEORY):
Vertical Roller Mill (VRM) The power used for the actual grinding process while grinding raw materials, depends mainly on the hardness of raw materials and the type of mill used, i.e. ball mill or vertical roller mill. Typically, the motor of the ball mill consumes about 14 - 15 kWh/ ton of raw mix whereas the VRM motor
issues with high vibration and prevent mill trips. Requirements of VRM operation Safe, reliable and productive use of a mill plant requires consideration of the following: • high production rates in the presence of potential limitations in: – mill table power – mill differential pressure via the mill fan – external recirculation
Vibration appears in the main drive system of the six-roller cold rolling mill of one plant. The oscillation frequency is 2.5 Hz. The oscillation cycle is 0.4 second. The oscillation period has nothing to do with the speed. Using the finite element software ANSYS, the low natural frequency is got through the modal analysis and harmonic response analysis based on the measured …
•Additional vibration data was collected from the motor & gearbox of the 1A Ball Mill Drive under no load. •To determine what problems (if any) existed with the drive, a comparison of the route vibration data between 1A & 1B Ball Mills was made as well as between loaded & unloaded data at 1A Ball Mill.
The vibration transmitted from the tools or materials to the hands and arms could damage sensory nerves, muscles and joints which is called hand arm vibration syndrome (HAVS). Vibration white finger This is a condition caused by damage to the circulatory system in the hands and fingers as a result of contact with vibrating tools.
Also provides knowledge about the foundation related problems and its percentage share on the partially or fully non availability of equipments in the overall power plant. Keywords: Machine foundation, Power plant, Rotary machine, Soil dynamics, Vibration Cite this Article: Nidhi R. Somkuwar, Machine Foundations for Power Plant: Some Design ...
The heat sources used in thermal power plants are either combustion of fossil fuels like coal, oil and natural gas or the nuclear fission (Nag 2008). There are hundred numbers of units, subunits, components, and parts in thermal power plant. The major components of a thermal power plant are; Turbine, Boiler, Generator, Condenser and Feed pumps.
vibration and plant operating data such as flow, temperature, or pressure. Continuous monitoring detects the onset of component problems in advance, which means that maintenance is performed only when needed. With this type of approach, unplanned downtime is reduced or eliminated and the risk of catastrophic failure is mitigated.
Among these power plants, only the mill in the Xinyang power plant was supported by non-vibration-isolated foundation, and the other plants all utilized spring vibration–isolated foundations for their mills. All medium-speed mills in these …
power plants maximum requirements of fuel is a coal. The handling of this fuel is a great job. To handle the fuel, i.e., coal, each power station is equipped with a coal handling plant. Maintenance of Critical Equipments for Coal Handling Plants (CHP) of Thermal Power Stations is …
At present the method for measuring the fill level which used the vibration signal of mill shell shows its advantage compared with other methods. However, this method is developed late, and the technique for collecting the vibration signal from mill shell is immature. In this paper, a novel method for collecting the vibration data from mill shell is proposed.
Gugel & Moon (2007) achieved a 6.2% drop in the energy consumption of the grinding mill when vibration data from bearing housing was used in process control instead of …
re vibration vertical roller mill. There are a number of reasons for high vibrations in vertical roller mills, such as: 1. Failure of the grout or cement material under the steel beams embedded in the foundation top, which allows oil to penetrate, further degrading the concrete.
Construction noise and vibration issues must be considered an essential part of the assessment of the development of any transportation facility. Road and tunnel construction is often conducted in close proximity to residential and commercial premises and associated noise and vibration should be pre-
The discussion is based on the authors' experiences at the six-unit, 1,890-MW Ramin Power Plant, located in Ahwaz, Iran. The units were commissioned from 1980 through 1985. Avoid Rotor Rubs
Analysis of the vibration spectrum can be divided into 3 areas: Sub-synchronous is less than 1x turning speed (TS) of the shaft and can identify problems with: belts, oil whirl/whip, rubs, loose roller bearing in housing, cage or train frequency of antifriction bearing, primary belt frequency, defective tooth-to-tooth repeat
Vibration Spectrum Analysis Written in a clear, understandable style, this new edition of Vibration Spectrum Analysis includes valuable information on using the latest techniques of spectrum analysis in solving problems and enhancing machine reliability. Vibration analysts, predictive maintenance specialists, and field mechanics will find it to ...
Vertical roller mills are adopted in 20 cement plants (44 mills) in Japan. Results Table Energy saving effect of the vertical roller mill Ball mill Specific power Cost estimation About 14million US$ [Newly-built] and about 230 million US$ [retrofitted], including the cost of supplemental facilities [200t-RM/h] [1US$=¥110] ...
problems in the paper making process and limit machine efficiency. This paper will review what a vibration study consists of and why it's performed. It will also discuss the process of machine analysis by vibration study, and provide some examples of "vibration signatures" which Valmet vibration experts encounter in the field.
The effects of vibration can be severe. Unchecked machine vibration can accelerate rates of wear (i.e. reduce bearing life) and damage equipment. Vibrating machinery can create noise, cause safety problems and lead to …
Spring vibration-isolated foundation was used for a medium-speed mill to reduce the impact of equipment disturbing force on the main plant in a thermal power …
Evaluation of hydraulic and dynamic performance is done regularly for one of the largest irrigation pumping station in Egypt. The pumping station consists of 10 vertical-axial flow pump type, with 2 m head, 16 m 3 /s discharge, and 90 rpm speed. The motor is 650 kW power, 1485 rpm speed, 11,000 volt, 41 A current, and the gearbox reduction speed ratio is 1:16.6.
