1. Introduction Introduction to the Project In reciprocating compressors complete balancing of reciprocating masses is not possible. Hence, vibration is unavoidable. We are trying to reduce vibration level. We want to learn how to analyse vibration in reciprocating compressors. We know that vibration is main problem. It can cause resonance which can leads to the failure of the system. Figure 1 oil-free reciprocating compressor We have focused on only 10 HP oil-free reciprocating compressor, which is rotating at about 600 rpm. If unbalanced forces are rotating at such speed than obviously high vibration may occur. This compressor compresses air in two stages and both the cylinders are at the right angle. Hence, for the analysis we have primarily applied balancing of v-engines theory. By doing this we can find the mass of counter balance which is to be mounted on the crankshaft. 1.2 Aims & Objectives We want to learn: How vibration in the system are analysed. What are the factors which are affecting the vibration of the compressors. How to control vibration of the reciprocating compressor. How we can …show more content…
A Piezo-electric substance is one that produces an electric charge when a mechanical stress is applied. In a Piezo-electric accelerometer a mass is attached to a Piezo electric crystal which is in turn mounted to the case of the accelerometer. When the body of the accelerometer is subjected to vibration the mass mounted on the crystal wants to stay still in space due to inertia and so compresses and stretches the piezo electric crystal. This force causes a charge to be generated and due to Newton law (F=ma) this force is in turn proportional to acceleration. The charge output is converted to voltage output by the use of integral electronics (for example: in an IEPE accelerometer) or made available as a charge output (pc /g) in a charge output Piezo electric
Roller screws are accustomed remodel rotary movement into linear movement and the other way around. The bearing components are threaded rollers positioned between the screw and therefore the nut. The massive variety of contact points permits roller screws to support terribly high loads. The roller screw is comparable to the ball screw with the distinction that the load transfer components are threaded rollers. When put next to standard ball screws, have the subsequent advantages: the most advantage of roller screws is that they need an outsized variety of contact points to support the load with higher permissible static and dynamic load capability. Due to the larger variety of contact points the bearing perform is ensured by uniform spreading of load over the threaded rollers rather than balls just in case of ball screws. It's higher mechanics and dynamics in operating condition, generates less vibration and lower noise. The transmission exactitude of PRS is higher and may add a lot of more durable condition. Because to these compensation, a lot of analysis on roller screw has been administrated, and therefore the roller screw has been utilized in the medical, aerospace, military, assembly, Food and drink, Plastics, textiles and machine tools industries.
Next, the refrigerant moves on to the next side of the refrigeration cycle, which is the high pressure side. The refrigerant leaves the compressor as a high temperature, high pressure gas and then moves to the condenser. At the condenser, the hot gas is condensed back to a liquid and it’s heat is given to the outside air. The refrigerant then moves from the condenser to the expansion valve where the amount of flow is restricted and lowers the pressure as the refrigerant leaves the expansion valve.
Question: Discuss the importance of Relief Valves in the unit operations in detail, and give the design criteria/ parameters/ models available equations in the literature. Support your work by giving a typical example from the literature.
A transducer is a mechanism that changes one form of energy to another form. A toaster is a transducer that turns electricity into heat; a loudspeaker is a transducer that changes electricity into sound. Likewise, an ultrasound transducer changes electricity voltage into ultrasound waves, and vice versa. This is possible because of the principle of piezoelectricity, which states that some materials (ceramics, quartz, and others) produce a voltage when deformed by an applied pressure. Conversely, piezoelectricity also results in production of a pressure whe...
Gas turbine engine performance is limited by aerodynamic instabilities called rotating stall and surge. Currently there are several control strategies for enhancing the operability boundary of laboratory compressors by actively controlling rotating stall and surge. Models which capture the qualitative behavior of the aerodynamic instabilities have been found to exhibit abundant dynamic behavior and to be useful for designing control laws.
Anybody and everybody can become an industrial machinery mechanic; especially, those who are passionate about getting their hands plastered in motor oil, grease, and other mechanical lubricants. These people will more than likely be ecstatic about getting into industrial machinery mechanics. They need to be able to put in one hundred ten percent of their effort into becoming an industrial machinery mechanic. An industrial machinery mechanic’s overall objective on the job is to stop a mechanical error before it happens. An industrial machinery mechanics are often caught repairing, maintaining, and fabricating machinery. They will be required to have certain education and training as well as some on the job training or complete an apprenticeship program. They will receive many benefits for working in this particular field.
...uctions with compressed air. Check for cracking, fraying, obvious looseness, and breaks on alternator fan and power steering pump drive belts
Once the ECU has the torque value, the mass air flow control acts on the butterfly valve to reach the torque value (the open percentage of the butterfly valve and mass air flow value come from a table which is used as in the case of torque estimation).
Humanity is threatened by the overwhelming growth of science and technology. People are expanding their knowledge through observation and experiment, oblivious to the consequences that result from improper motive. Isaac Asimov—author of The Life and Times of Multivac—uses the science of numbers, or mathematics, as a solution to the fear that arises in a world controlled by a human-like machine. What human beings are afraid of is losing the very word that separates them from everything else in the world—human, and they will do whatever they can to keep that title to themselves.
Wilson, D. G., & Korakianitis, T. (1998). The design of high-efficiency turbomachinery and gas turbines (2nd ed.). Upper Saddle River, NJ: Prentice Hall.
In the field, most of the motors are induction motors. Now-a-days, industry has become more concerned about the performance of the motor. By improving the efficiency of motors we can save energy, reduce operating costs, and improve the End-User Profitability. In case of any failure, motors usually can be rewind, it is often worthy to replace a damaged motor with a new one to save energy and improve reliability.
Over the years my family has taken numerous road trips across the country. During these trips we would pass through countless wind farms which would peak my curiosity. Therefore, I decided to do some research into wind turbines.
A cascade is defined as an infinite row of equidistant similarly aerofoil bodies. The cascade is used to divert a flow stream with a minimal loss. The flow over an axial cascade presents a complicated intra blade fluid dynamic interaction that causes the flow to behave differently than the flow over a single aerofoil blade. The cascade is used to divert a flow stream with a minimal loss. It forms the basic block for the design and development of turbomachinery, particularly the axial compressor and axial turbine. The turbine usually shows tolerance to the blade design and alignment errors because blades of a turbine stage perform under a favorable pressure gradient whereas compressor blades are prone to aerodynamic losses because these have
NiSource is one of the biggest natural gas distribution companies in the USA. Company is not responsible for the production of natural gas, but rather purchases fossil fuel at the source and transmits supply thru its pipelines to industries and local costumers. Natural gas can be transported to distribution facilities in two ways: underground gas pipelines or shipped by the sea in LNG tankers. In nature during the extraction, natural gas exists as a gas, which needs to be captured by special pipeline system designed for gathering processes. Captured gas contains water and other impurities that have to be removed in production well. In order to be transported, it needs to be cooled and transformed into liquid, which increases transportation efficiency to processing units and improves transportation cost ratio. Regasification is the process when "wet", liquid natural gas is processed and changed to pipeline quality natural gas. Natural gas needs to be turned back to gas in order to be useful for residential and commercial customers. This process needs to be monitored and measured for quality and content of natural gas due to the risk of pipeline rupture and safety. "Natural gas entering the system that is not within certain specific gravities, pressures, Btu content range, or water content level will cause operational problems, pipeline deterioration, or even cause pipeline rupture."1 Natural gas transported to distributors is called "dry" gas due to the physical state.
This method is only done in wound rotor motors, by adding resistance to the rotor circuit in the rotor bars, this will affect the torque-speed curves greatly. This method is affective and not expensive.