Rotor assembly

The ring-type granulator Penn.sylvania Cru.sher Corp.) features a rotor assembly with loose crushing rings, held outwardly by centrifugal force, which chop the feed. It is suitable for highly friable materials which may give excessive fines in an impact miU. For exam-... 

The rotor assembly (Figure 5-17) shall be multi-plane dynam-ieally balaneed at rated speed. 

The shaft (Figure 5-18) shall be separately balaneed prior to rotor assembly. 

Figure 5-19. Rotor assembly showing tapered shaft end.

The rotor assembly shall have a unique identifieation number permanently marked on the shaft. Blade and disk residual life eurves shall be provided by the Seller. The disk/shaft attaeh-ment shall be redundant so that if the primary torque transmission path fails, a seeondary path will prevent separation of the disk from the shaft. 

The rotor assembly shall be at-speed balaneed. During the at-speed balanee, the rotor shall be aeeelerated to 115% of maximum eontinuous speed for 3 min to eonfirm the integrity of the disk and rotor blades. If there is a spare rotor, it shall also be at-speed balaneed and oversped. A residual... 

Provisions for future balaneing of the final rotor assembly, when and if neeessary. 

Radial bearings or journal bearings are usually pressure-lubricated. Most compressors use two bearings on opposite ends of the rotor assembly or on... 

The manufacturer will have carried out a full mathematical investigation into the system vibration response. One quality control requirement will be to establish whether the correct assumptions have been made Rotor assembly and component weights should be obtained during man ufacture and verified against mathematical data used. 

Figure 11-21D. Helical rotors refrigerant compressors. (1) Cutaway of a 100-ton intermediate compressor. The intermediate Helirotor compressor has only three moving parts the two rotor assemblies and the capacity controlling slide valve. The general purpose Helirotor compressor has only four moving parts two rotor assemblies, the variable unloader valve, and the step unloader valve. Unlike reciprocating compressors, the Trane Helirotor compressor has no pistons, connecting rods, suction and discharge valves, or mechanical oil pump.

Figure 12-97. Axial rotor assembly. (Used by permission A C Compressor Corporation.)...

Figure 12-110E. Type L Axi Helical rotor assembly and rotation details. (Used by permission Form 11193-F, 1987. Dresser-Rand Company.)...

The fundamental design considerations of a sliding-vane compressor are the rotor assembly, cylinder housing, and the lubrication system. 

Mass Mass is the property that describes how much material is present. Dynamically, the property describes how an unrestricted body resists the application of an external force. Simply stated, the greater the mass the greater the force required accelerating it. Mass is obtained by dividing the weight of a body (e.g., rotor assembly) by the local acceleration of gravity, g. 

Critical speed is a function of the natural frequency of dynamic components such as a rotor assembly, bearings, etc. All dynamic components have one or more natural frequencies that can be excited by an energy source that coincides with, or is in close proximity to, that frequency. 

For example, a rotor assembly with a natural frequency of ISOOrpm cannot be rotated at speeds between 1782 and 1818rpm without exciting the rotor s natural frequency. 

The unique natural frequencies of dynamic machine components are determined by the mass, freedom of movement, support stiffness, and other factors. These factors define the response characteristics of the rotor assembly (i.e., rotor dynamics) at various operating conditions. 

Dynamic When the natural frequency of a rotating, or dynamic, structure (e.g., rotor assembly in a fan) is energized, the rotating element resonates. This phenomenon is classified as dynamic resonance and the rotor speed at which it occurs is referred to as the critical. In most cases. 

In most cases, running speed is the forcing function that excites the natural frequency of the dynamic component. As a result, rotating equipment is designed to operate at primary rotor speeds that do not coincide with the rotor assembly s natural frequencies. Most low- to moderate-speed machines are designed to operate below the first critical speed of the rotor assembly. 

Higher-speed machines may be designed to operate between the first and second, or second and third, critical speeds of the rotor assembly. As these machines accelerate through the resonant zones or critical speeds, their natural frequency is momentarily excited. As long as the ramp rate limits the duration of excitation, this mode of operation is acceptable. However, care must be taken to ensure that the transient time through the resonant zone is as short as possible. 

The first consideration of dynamic balancing is the number of imbalance points on the rotor, as there can be more than one point of imbalance within a rotor assembly. This is especially true in rotor assemblies with more than one rotating element, such as a three-rotor fan or multi-stage pump. 

The ISO has published standards for acceptable limits for residual imbalance in various classifications of rotor assemblies. Balancing standards are given in oz-ins or lb-ins per pound of rotor weight or the equivalent in metric units (g-mm/kg). The oz-ins are for each correction plane for which the imbalance is measured and corrected. 

DPDPB has been used to study the endocytosis of cadherin from intracellular junctions (Troyanovsky et al., 2006), the subunit arrangement in the flagellar rotor assembly (Lowder et al., 2005), and the disease-associated mutations in myelin proteolipid protein in the endoplasmic reticulum (ER) (Swanton et al., 2005). DPDPB can be used to conjugate reduced antibody molecules to p-D-galactosidase using essentially the same protocol as that described by O Sullivan et al. (1979). 

Generally, the permanent magnet is mounted on only one of the rotor assemblies. The rotor is chosen on the basis of what RPM speed is considered the de-... 

The sequence of rotor assembly and balance correction shall follow ISO 5406. For balancing, the rotor does not include the pump half coupling hub or the rotary units of the mechanical seals. 

O domestic O export O export boxing requirei O outdoor storage more than 6 months SPARE ROTOR ASSEMBLY PACKAGED FOR ... 

Functioning. No action takes place on firing until a prescribed centrifugal force has been set up by rotation of the projectile in its travel, whereupon the plunger pins (G) holding the rotor assembly (F) and those supporting the fire pin (I) move forward. 

The fuze body assembly consists of metallic body which contains index lock pin, stop screw, index stop, striker assembly, rotor release assembly, delay lock pin, and rotor assembly. The explosive train consists of delay element M9, relay XM9 (2.31 grains of LA), detonator M35 (in rotor assembly) and a booster cup assembly. 

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