Abstract:
To provide a simple blower which can suppress the infiltration of a target gas into a shaft hole and having a small size and cost reduction, a blower comprising a first casing (11) formed with a gas passage (11c) for introducing a high temperature gas and a shaft hole (11e) for communicating therewith, a rotating shaft (14) inserted to be freely rotatable within the shaft hole (11e), an impeller (13) housed within the first casing (11) which integrally rotates with the rotating shaft (14), a motor (15) for driving the rotating shaft (14) from the rear end side, a second casing (12) having an interior space (21) which communicates with the shaft hole (11e) and supporting the rotating shaft (14) via bearing (22A, 22B), and a purge gas introduction means (16) which introduces to the interior space (21), a purge gas having a higher pressure than a pressure of the shaft hole (11e), wherein the inflow of an exhaust gas into the shaft hole (11e) from the gas passage (11c) side of the first casing (11) is suppressed by introducing the purge gas into the interior space (21).
Abstract:
The invention provides an autonomous subsea barrier fluid system for a subsea pressure booster, the subsea pressure booster comprising a process fluid compartment, a motor compartment and a rotor assembly extending from the motor compartment into the process fluid compartment with one or several shaft seals separating the process fluid from the barrier fluid in the motor compartment. The subsea barrier fluid system is distinguished in that it comprises: a subsea barrier fluid pump, a barrier fluid delivery line, arranged between the barrier fluid pump and the motor compartment, a pressure controlled regulator, operatively arranged to at least one of the barrier fluid delivery line and the subsea barrier fluid pump, a subsea barrier fluid storage, and a barrier fluid suction line arranged from the subsea barrier fluid storage to the subsea barrier fluid pump.
Abstract:
A shaft seal for an exhaust fan. The seal limits leakage from within an exhaust fan housing around an exhaust fan drive shaft that extends between a rotational power source exterior to the exhaust fan housing and a position within the exhaust fan housing. The seal comprises a plenum generally positioned about the exhaust fan drive shaft at the point where the shaft extends into the fan housing; an auxiliary blower comprising a housing, an internal blade driven by an auxiliary blower drive shaft, and an auxiliary blower drive to rotate the drive shaft where the auxiliary blower drive is operatively associated with the rotational power source such that operation of the rotational power sources causes a rotation of the exhaust fan drive shaft and the auxiliary blower drive shaft; and a duct fluidly connecting the auxiliary blower housing to the plenum.
Abstract:
A fluid energy machine having a rotor, with a casing that separates an interior from an exterior, having at least one shaft seal for sealing a gap between the rotor and casing. The shaft seal is a tandem dry gas seal, having an inner and outer seal. The outer seal has a first sealing gas feed, which opens into the gap axially between the outer and inner seal. The shaft seal has a primary discharge between the inner and outer seal, which extracts primary discharge fluid from the gap. The first sealing gas feed has a first control member for controlling the flow rate of the sealing gas. The primary discharge has a second control member for controlling the flow rate of a primary discharge fluid. The first and second control members are matched such that the first pressure is adjusted to a first pressure setpoint.
Abstract:
A sealing system is equipped with a dry gas seal having a rotating ring positioned between a casing and a rotor shaft and around the circumference of the rotor shaft, and stationary rings provided on the casing with elastic members interposed therebetween and so as to be capable of contacting the orthogonal edge surfaces of the rotating ring that are substantially orthogonal to the rotor shaft; a sealing gas channel having one end connected to a discharge channel, the other end connected so as to connect to a space between the casing and the outer perimeter surface of the rotating ring in the dry gas seal, and having a sealing gas regulating valve provided therein; and a drain gas channel having one end connected so as to connect to the space via a through hole formed in the casing below the rotating ring, and the other end connected to an intake channel.
Abstract:
The invention relates to an underwater delivery unit with a pump and a drive device that is sealed against the surrounding water and a process medium. According to the invention, the pump (31) and the drive device (32) are combined into a module with a module housing (3) and are arranged in a pressure housing (2), wherein the pressure housing (2) is filled with the process medium and surrounds the module housing (3).
Abstract:
A compressor is disclosed having a shaft seal assembly and system that allows a high-pressure compressor to settle-out at a lower pressure level during shutdown. The seal assembly may be disposed about a portion of the shaft and define a blow-down seal chamber, the seal assembly including one or more gas seals in fluid communication with the blow-down seal chamber. A blow-down line is communicably coupled to the blow-down seal chamber to reference the blow-down seal chamber to a low pressure reference, such as a separate centrifugal compressor, or the like. Referencing the blow-down seal chamber to the low pressure reference reduces the required sealing pressure of the one or more gas seals. A valve may be disposed in the blow-down line and configured to regulate a flow of process gas leakage through the blow-down line.
Abstract:
This fan (1) includes a volute (2) whose inlet opening (3) is in communication with the oxygen feed line, an impeller (4) situated immediately downstream of the inlet opening of the volute and including an inlet opening connected to this inlet opening (3) of the volute and outlet orifices (4a) emerging into the volute (2), and an electric motor (5) for rotating the impeller (4). The fan (1) includes: —a compartment (6) in which the motor (5) and, where appropriate, other electric elements or components belonging to the fan (1) are placed, this compartment (6) including an end wall (13) traversed by the shaft of the motor (5) and being supplied with pressurized air, and—a leak collection chamber (7) situated intermediately between the volute (2) and the compartment (6), this chamber likewise being traversed by the shaft of the motor (5) and including a discharge orifice (20).
Abstract:
A shaft seal for a transmission expander or compressor having at least one rotor which rotates in a housing and is arranged in a floating manner on a shaft, the shaft seal having a seal arrangement with seal tips attached on the hub of the rotor. A stationary sealing ring surrounds the seal tips which are arranged in three seal sections. An annular chamber is arranged between in each adjacent pair of seal sections. The annular chamber which faces the interior of the transmission expander or compressor is equipped with a feed means for a sealing gas, the pressure of which is higher than the pressure in the interior of the transmission expander or compressor. The annular chamber which faces away from the interior of the transmission expander or compressor is provided with an extraction means for the sealing gas.
Abstract:
In the operation of a compressor system in a subsea station for transporting a well stream, separated well stream gas is supplied to a compressor (12, 13) which is arranged with its motor (8) in a common drive atmosphere within a pressure shell (21). As the drive atmosphere there is used a suitable, continually supplied dry extraneous gas, which is supplied to the well stream. There may be used a suitable dry extraneous gas which is stored in liquid form in an insulated container. There is also described a compressor system wherein there may be used as the drive atmosphere a continuously supplied, suitable dry extraneous gas.