Abstract:
A rotary machine (12) comprises a housing (14), a rotor (16) that is rotatably disposed within the housing and having an axis (18) about which the rotor may spin, and a seal (24) disposed upon the housing. The seal comprises a support (26) disposed on the housing and a plurality of flexible non-metallic bristles (28) that extend from the housing and engage the rotor, such that the seal provides a barrier to fluid flow between a first region (22) located in a first axial direction from the seal and a second region (34) located in an opposite axial direction from the first region. The first region is filled with a bearing liquid and the second region is filled with a process fluid.
Abstract:
A seal assembly is for a compressor including a casing having first and second chambers and a shaft extending through the casing between the two chambers. The seal assembly includes a main body disposed about the shaft and between the two chambers and having a central axis, an inner surface spaced radially outwardly from the shaft to form a seal chamber. Annular sealing members are connected with the main body and extend radially from the body inner surface toward the shaft, the sealing members preventing flow between the first and second chambers through the seal chamber. A separator is coupled with the shaft adjacent to the main body and has separation passages fluidly connecting one of the two chambers with the seal chamber, each passage extending radially with respect to the shaft axis so as to direct liquids and solids contacting the passage inner surface away from the seal chamber.
Abstract:
A lubricant retainer for use in a pump bearing assembly, the bearing assembly which in a first operating configuration is lubricated by a relatively highly viscous lubricant, and which in a second operating configuration is lubricated by a less-viscous lubricant, the bearing assembly comprising a bearing housing having a bore extending therethrough for receiving a pump drive shaft, spaced-apart bearing mounting zones within said bore with a chamber therebetween, each bearing mounting zone arranged for the in use receipt of a bearing therein. Each zone has associated therewith one lubricant retainer, the lubricant retainer being adapted to be mounted within the bore adjacent the bearing mounting zone with which it is associated so as to form a barrier between the bearing mounting zone and the chamber when the pump bearing assembly is in the first operating configuration, the retainer being removed when the pump bearing assembly is in the second operating configuration.
Abstract:
An adjustment assembly for pump casing of a pump, the pump casing including a main part and a side part having a main axis and a side wall section extending laterally with respect to the main axis. The adjustment assembly is operable to cause relative displacement between the side part and the main part of the pump casing. The adjustment assembly includes a drive device and an actuator which can be activated externally of the pump, the drive device being operable to cause the relative displacement of the side part in response to activation of said actuator, the relative displacement capable of being a combination of axial and rotational movement.
Abstract:
An exemplary embodiment providing one or more improvements includes a shaft seal cartridge for the motor shaft of a vacuum pump which combines three shaft seals in one unit. The cartridge greatly simplifies the replacement of seals and eliminates the requirement for expensive seal lubrication oil, and extends the life of the shaft seals. Embodiments of the cartridge are manufactured from fiberglass/molybdenum filled polytetrafluoroethylene.
Abstract:
The present invention relates to a device for permitting certain movement of a gland (20) to be mounted in a machine, which comprises a rotating shaft (16) extending through a stationary part (10) of the machine, the gland (20) providing a flame path between the shaft (16) and the gland (20). The invention is characterised in that the device (42) comprises resilient dampening means (42) arranged between the gland and the stationary part, capable of permitting radial and axial movement of the gland during rotation of the shaft. The invention also relates to a gland designed and arranged to co-operate with the device.
Abstract:
The invention provides a fan having a beam (10), a first set of blades (20) mounted about a first axis (22) towards a first end of the beam, a second set of blades (30) mounted about a second axis (32) towards a second end of the beam (10), and at least one drive (40) for powering the first and second sets of blades (20, 30) in order to rotate the first and second sets of blades (20, 30) about the first and second axes (22, 32) respectively; wherein the beam is caused to rotate about a third axis (12). Because of the rotation of the beam in addition to that of the sets of blades, such a fan generates air flow over the area of a circle with a diameter equal to the maximum distance between blade tips of the first and second sets of blades. Such an area is significantly larger than that of the two sets of blades alone and is advantageous because air flow can be generated and consequently felt over a larger area.
Abstract:
A compressor system (10) includes a gas compressor (18) with dry gas seals (66, 68) about a driveshaft (64). The compressor system (10) also includes a fugitive gas system (30) having a gas conduit (36) in fluid communication with a collection cavity (34, 35) in a collector (32) coupled to the gas compressor (18) to receive fugitive gas leaked through a pressurized gas leakage path (67, 69). The fugitive gas system (30) may be structured for flaring the gas, and includes a pressure control system (42) with an accumulator tank (44), and a vent line (46) for venting gas pressure and having a backpressure regulator (52) therein. Fugitive combustible gas is conveyed through a flow restriction orifice (96, 100) downstream of the compressor (18).
Abstract:
L'invention vise à obtenir une durée de vie maximisée du moteur (2) d'un appareil d'assistance respiratoire et une fiabilité augmentée de cet appareil. Pour ce faire, l'air de refroidissement moteur provient du flux d'air (F0) pénétrant dans l'enceinte (100) et les paliers (3) du moteur (2) sont protégés de la circulation d'air par étanchéification entre les parties tournantes et fixe du moteur (2). Dans un appareil selon l'invention, l'air refroidissement est ainsi prélevée dans la volute (12) et s'écoule entre le rotor (22) et le stator (23) du moteur (2) à travers des orifices (24, 27) formés dans chacun des flasques d'extrémité (20a, 20b), et dans un canal d'évacuation d'air (105) couplé d'une part à la paroi tubulaire (21 ) du carter (20) et d'autre part à la sortie d'air de refroidissement (122) de l'enceinte (100). Des rondelles d'étanchéité (4a, 4b), solidarisées et centrées sur les flasques d'extrémité (20a, 20b), sont dimensionnées de sorte que ces rondelles (4a, 4b) protègent les paliers (3) de l'air (F3, F4, F5, F6) circulant et sortant du moteur (2) sans obturer les orifices (24, 27) du système de refroidissement et sans générer de frottements.
Abstract:
Compresseur 9, 17 électrique comportant un arbre 13 entraîné en rotation par un moteur électrique par l'intermédiaire de roulements 16, l'arbre entraiment en rotation une roue de compresseur 14, le compresseur 9 comportant deux segments d'étanchéité 29a, 29b montés autour de l'arbre 13 entre les roulements 16 et la roue de compresseur 14 et comportant un trou d'évent 35, 37 de circulation de flux de polluants vers l'extérieur du compresseur, dont l'entrée est disposée entre les deux segments d'étanchéité, le compresseur comportant au moins un joint 100 de protection des roulements 16.