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Turbine-Driven Reciprocating Compressor and Method

a reciprocating compressor and turbine technology, applied in the direction of positive displacement liquid engine, pump control, pump pump, etc., can solve the problems of high wear rate, non-uniform temperature field inside the turbine, and high risk of damage to the steam turbine shaft and seal, so as to increase the speed of the turbine

Inactive Publication Date: 2014-04-03
NUOVO PIGNONE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a system and method for starting up a turbine and a reciprocating compressor. The system includes a clutch that connects or disconnects the turbine from the compressor during different phases of operation. A barring device is also provided to prevent damage to the turbine during a high-speed phase of operation. The method involves starting up the turbine, engaging it with the compressor, and then starting up the reciprocating compressor while deactivating the secondary mover. The technical effects of this system and method include reduced costs and space, as well as improved efficiency and reliability.

Problems solved by technology

Non-uniform temperature fields inside the turbine arise upon shutdown, since the lower portions of the turbine cool faster than the upper portions.
Moreover, the barring speed is insufficient to develop a lubrication oil film in the hydrodynamic bearings, and therefore during slow turning of the turbine the bearings operate in a boundary lubrication condition involving high wear rate.
Furthermore, in case of sudden failure of the reciprocating compressor 3, there is a risk of damage of the steam turbine shaft and seals, if the barring device 19 is not able to run, e.g. in case of locking of the crankshaft 7.
This can provoke resonance phenomena, which can damage components of the system, including the gearbox.
During this transient phase, the turbine cannot generate sufficient power to drive the reciprocating compressor under load.
On the other hand, the reciprocating compressor cannot run under no-load conditions for a long period of time.

Method used

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Embodiment Construction

[0035]The following detailed description of the embodiments refers to the accompanying drawings. The same reference numbers in different drawings identify the same or similar elements. Additionally, the drawings are not necessarily drawn to scale. Also, the following detailed description does not limit the invention. Instead, the scope of the invention is defined by the appended claims.

[0036]Reference throughout the specification to “one embodiment” or “an embodiment” or “some embodiments” means that the particular feature, structure or characteristic described in connection with an embodiment is included in at least one embodiment of the subject matter disclosed. Thus, the appearance of the phrase “in one embodiment” or “in an embodiment” or “in some embodiments” in various places throughout the specification is not necessarily referring to the same embodiment(s). Further, the particular features, structures or characteristics may be combined in any suitable manner in one or more e...

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Abstract

A reciprocating compressor system is provided comprising: a turbine; a reciprocating compressor driven by the turbine; and a gearbox arranged between the turbine and the reciprocating compressor. The turbine is provided with a barring device arranged for slow-turning the turbine during a barring phase. A clutch is arranged between the turbine and the reciprocating compressor, for mechanically disconnecting the turbine from the reciprocating compressor during a transient phase of operation of the system.

Description

BACKGROUND OF THE INVENTION[0001]Embodiments of the present disclosure generally relate to reciprocating compressor systems and more specifically to reciprocating compressor systems driven by turbines, such as steam turbines.[0002]Reciprocating compressors are commonly used in the industry for compressing gases in a wide range of applications. Reciprocating compressors are usually driven by a prime mover, which can be an electric motor, a reciprocating internal combustion engine or a gas or steam turbine.[0003]FIG. 1 illustrates an arrangement 1 comprising a reciprocating compressor system, comprising a compressor 3, and a steam turbine 5 used to drive the reciprocating compressor 3. In FIG. 1 the reciprocating compressor 3 comprises a plurality of compressor cylinders 3A, 3B, 3C and 3D. A common crankshaft 7 drives the four reciprocating compressor cylinders 3A-3D and supports a flywheel (not shown). The crankshaft 7 is rotatingly supported in a casing 9 and is driven into rotation...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B35/00
CPCF04B35/00F01D15/08F01D15/12F04B35/006F04B35/01F02C7/36
Inventor PRATELLI, GUIDOTOGNARELLI, LEONARDO LIMILANI, GIULIANOFAILLA, LORENZOTAMMARO, NICOLASONNOLI, MARCO
Owner NUOVO PIGNONE SPA
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