Generator rotor. Thoroughly inspect all stress carrying parts of rotor for cracks. Pay particular attention to welds on the rotor spider. Generator air coolers. Check for any leaks. If possible, inspect interior of tubes for scale buildup or corrosion. If spare coolers are available, make sure they are ready for installation. 2.3 Drawings
grounding of the shaft or the use of ceramic bearings. Caution: when insulating motor bearings, other bearings driven by the motor can fail due to electric discharge. A grounding system is recommended. The flow of current coming from the rotor to the stator can damage every bearing if countermeasures are not implemented. STATOR SLOTS Stator Rotor
The vehicle owner may say that under light braking the vehicle pulses to a stop or under heavy braking the vehicle shudders. Technical service bulletins (TSBs) often describe these symptoms as a "judder." There are only two causes for judder — lateral runout and disc thickness variation on the rotor's friction surface. Click Here to […]
The rub can cause elastic deformation of the rotor at the point of impact and temporary rotor shaft bending. The shaft bending will usually cause increased vibration levels (Figure 1). 1.
The vertical shaft impact crusher (or VSI) has a rotating shaft that runs vertically through the crushing chamber. In a standard configuration, the VSI's shaft is outfitted with wear-resistant shoes that catch and throw the feed stone against anvils that line the outside of the crushing chamber.
4. Assisting in heat dissipation out of the bearing elements. Grease lubrication is the method most commonly used on small and medium size electric motors in the range of 1 to 500 HP for horizontal machines. Sleeve bearings may be used in larger horsepower or 2 pole or high-speed applications. Vertical pump motors start to use oil-lubricated ...
Wind turbine is a kind of rotating machinery. Although the horizontal axis wind turbine (HAWT) is the most popular wind turbine, the vertical axis wind turbine (VAWT) with the main advantages of smart design, novel structure, and …
A vertical axis wind turbine (VAWT) has blades mounted on the top of the main shaft structure, rather than in the front like an aircraft rotor. The generator is usually placed at the tower base. Used less often than their horizontal …
Shaft Design Procedure • Vertical shear stresses and direct normal stresses due to axial loads may also occur. • On very short shafts or on portions of shafts where no bending or torsion occurs, such stresses may be dominant. Procedure 1. Determine the rotational speed of the shaft. 2. Determine the power or the torque to be transmitted by ...
rotor fouling (dirt or other deposits on the rotor), bowing of rotors due to uneven heating or shaft damage, loss of rotor material possibly from rubs, or other causes. Balance correction is most effective when it is applied at or on the component that actually has the unbalance. In most cases the rotor
Abstract. The paper considers an impact of viscous linear and cubic nonlinear damping of the elastic support on nonlinear vibrations of a vertical hard …
Rotating shafts tend to bow out at certain speeds and whirl in a complicated manner. Whirling is defined as the rotation of the plane made by the bent shaft and the line of centers of the bearings. The phenomenon results from such various causes as mass unbalance, hysteresis damping in the shaft, gyroscopic forces, and fluid friction in bearings.
of the rotor end fl oat limits. Th e magnetic centre does not need to be in the same position as the mechanical centre, but is located between the end fl oat areas. Th e magnetic centre is permanently marked on the shaft with a groove. When the motor is running, the rotor will take the position of the magnetic centre.
PRIORITY CLAIM. In accordance with 37 C.F.R. 1.76, a claim of priority is included in an Application Data Sheet filed concurrently herewith. Accordingly, the present invention claims priority as a continuation of U.S. patent application Ser. No. 14/703,471, entitled "Vertical Axis Wind Turbine", filed on May 4, 2015, which is a continuation of U.S. patent application Ser. No. …
Rotor track and balance is the process of smoothing vibrations in the airframe, which are caused by the main rotor. The main rotor is not the only rotating assembly of …
The rotor contains distributed mass, elastic shaft, and stiff plate, which have N nodes and M plates. For each shaft unit, E, I, G, μ, L, ρ, and A represent the elastic modulus, area moment of inertia, shear modulus, Poisson ratio, shaft length, shaft density, and shaft cross-sectional area, respectively. For disc P i, m rpi, J ddi, and J pdi are disc mass, equatorial moment of inertia, …
DESIGN AND PERFORMANCE ANALYSIS OF FRANCIS TURBINE RUNNER FOR VERTICAL AXIS WIND POWER GENERATION. By Amit Gope. Recent Advances in Rotor Design of Vertical Axis Wind Turbines.pdf. By Mostafa Rashed. LOW EXPENSE VERTICAL AXIS WIND TURBINE USING PERMANENT MAGNETS. By IAEME Publication. Thesis-d2.
turbine - turbine - Steam turbines: A steam turbine consists of a rotor resting on bearings and enclosed in a cylindrical casing. The rotor is turned by steam impinging against attached vanes or blades on which it exerts a force in the …
Shaft deflection, runout, vibration, and axial motion Chapter D4 Page 6 Contact Kalsi Engineering Search this handbook Figure 5 Groove wall wear due to dynamic runout This photo shows wear of the environment-side wall of a seal groove that occurred during extensive operation at 346 ft/min with 0.010" dynamic runout.
shift the rotor axis in such a way that the rotor is rotating force-free. 9. The precision with which the state of the rotor can be controlled, for example the precise
I would suggest you to take motor shaft run-out using dial indicator to check for bent shaft. and secondly do check for looseness of pump foundation (one of the grouting bolt may be loose) it is quite possible that the whole frame is …
components of the generator are the rotor and the stator. The rotor is the rotating assembly to which the mechanical torque of the turbine shaft is applied. By magnetizing or "exciting" the rotor, a voltage is induced in the stationary component, the stator. The principal control mechanism of the generator is the
• Shaft deflection = diagonal contact with ends of bearing • Longer machine = Higher production costs The longer and heavier the rotor, or the more flexible the shaft, the more shaft deflection (Figure 3) should be expected. Shaft deflection may force the designer to increase the clearance between the sleeve bearing and journal.
through windings on the rotor by means of slip rings and brushes. This maintains a rotating electromagnetic field of fixed polarity (similar to a rotating bar magnet). The rotating magnetic field of the rotor extends outward and cuts through the armature windings embedded in the surrounding stator. As the rotor turns, alternating voltages