Abstract:
A bearing monitor for use with a canned motor pump having a wound stator and a rotor drivably coupled to an impeller, the rotor being mounted on radial journal bearings and axial thrust bearings within a containment can comprises a first and a second target embedded in an outer periphery of the rotor in axial proximity to a first and a second end of the rotor. The monitor includes a plurality of sensors mounted external to the containment can in axial proximity to each of the two targets and radially displaced approximately equally around the periphery of the containment can. A plurality of magnetic field generators create local magnetic fields coupled through the containment can, process fluid, rotor, and at least a portion of one target to one of the sensors. In response to each field, each sensor generates an output signal which varies as a result in a change in the magnetic circuit reluctance caused by bearing wear. A monitor circuit is coupled to the sensors and compares their output signals to generate a scaled output which is approximately linearly related to bearing wear. The output of sensors in the same axial plane are utilized to determine bearing wear in a radial direction, while the output of sensors in different axial planes are utilized to determine bearing wear in an axial direction. Electromagnetic shielding may be used depending on the environmental and operating conditions.
Abstract:
Improved fuel atomization for turbine engines operating at low fuel flows and at high altitudes is accomplished in an engine (10) having an annular combustor (12) by utilizing fuel injectors (18) provided with fuel supply tubes (24) disposed within air tubes (20) wherein the fuel supply tubes (24) each have an exit orifice (26) internally of the corresponding air tube (20) and upstream of an exit orifice (22) thereof with a fuel impingement surface (28) being provided within the air tube (20) in confronting relation to the exit orifice (26) of the fuel supply tube (24) to produce a conical fuel film (36) subjected to pressurized air to enhance fuel atomization.
Abstract:
A rotor (12) for a brushless permanent magnet generator/motor (10) comprises a retention slot (46) extending into a rotor flange (34) for receiving a root (48) of a permanent magnet (36). The retention slot (46) comprises a base (54) extending axially into the rotor flange (34), a pair of side walls (56, 58) extending radially from the base (54), and a pair of lugs (60, 62) projecting from the side wall (56, 58) to engage the root (48) to provide radial and tangential retention of the permanent magnet (36). In other embodiments, the permanent magnet (36) is further restrained in the axial direction by a spring pre-loaded axial retention ring (38).
Abstract:
A dynamoelectric machine (100) comprises a first rotor shaft (102), a second rotor shaft (104) and a central element (106). The first rotor shaft (102) rotates about a central axis (C/L) of the machine (100) and has a first magnetic drive element (108) disposed about an outer circumference of the first rotor shaft (102). The second rotor shaft ( 104) rotates about the first rotor shaft (102) and has a second magnetic drive element ( 110) disposed about an inner circumference of the second rotor shaft (104). The central element ( 106) is disposed between the first rotor shaft (102) and the second rotor shaft (104) and is configurable to remain stationary while the first rotor shaft and the second rotor shaft rotate about the central axis (C/L). The central element ( 106) also includes a third magnetic drive element (112) for interacting with the first magnetic drive element (108), and a fourth magnetic drive element (114) for interacting with the second magnetic drive element (110).
Abstract:
A gas/oil separator is provided, wherein a pre-separator tube has an upper solid portion, and a lower perforated portion. Holes in the lower perforated portion allow a gas stream to move radially inwardly, and to a downstream filter pack. The holes have a raised portion extending radially outwardly, and prevent previously separated oil from being reintroduced into the gas stream.
Abstract:
An electrochemical cell structure has a first fluid chamber and a resilient member disposed in the first fluid chamber. An opening permits communication of fluid into the first fluid chamber. An anode cavity and a cathode cavity are in fluid communication with the fluid chamber through the opening.
Abstract:
An electric motor includes a stator assembly having an annular stator core with an inner diameter and an outer diameter. The inner diameter is formed with a plurality of winding slots extending from a first end of the stator core to a second end of the stator core. A plurality of windings are disposed within the winding slots beginning with a first slot. The windings are coupled into at least one winding group associated with at least a first phase, and each winding has a first winding end and a second winding end extending from the first end and the second end, respectively, of the stator core. At least one thermal fuse is disposed in thermal contact with the first winding end and substantially adjacent to the first winding portion.
Abstract:
A recording system (20) and process minimizes the storage capacity for recording multi-channel data into the memory space normally allocated to a single channel for a predetermined time period without compressing the data. In order to enable the data to be correlated with either real or relative time, the data is recorded along with its channel number and stored sequentially in an electronic memory (48) in predetermined time increments. Additionally, the channel activity is monitored and stored. By recording the channel number with the data and identifying the periods of channel activity, the recording data can be correlated with the time during which it was recorded. The recorded apparatus in accordance with the present invention is particularly well suited for minimizing memory requirements for recording multi-channel sequential data, such as in certain voice communications, as well as simplex and half duplex communications even in situations where there is some overlap in channel activity without the use of data compression.
Abstract:
A generator system having self-build-up characteristics with an integral permanent magnet generator exciter (44). A rotor shaft (16') is journalled in a housing (12). A main stator (28') is secured within the housing, and a rotating field (26') is magnetically coupled to the main stator and secured to the rotor shaft for rotation therewith. An exciter field (22') is secured within the housing, and an exciter armature (24') is magnetically coupled to the exciter field and secured to the rotor shaft for rotation therewith. A plurality of permanent magnets (50) are integrally secured to a radially inner periphery of the exciter field immediately adjacent a radially outer periphery of the exciter armature.
Abstract:
A lube pump has a housing with a flange extending radially outwardly from a body of the housing. At least one rotor is received within the housing, and a shaft for powering the rotor extends away from the flange. A retention plate is positioned on an end of the flange closing the housing. A first set of bolts secure the flange to the retention plate. A second set of bolts secure the flange to the gearbox. The two sets of bolts extend in opposed directions. A gearbox including such a lube pump is also disclosed and claimed.