Patent ID: 9004857
Filing Date: 2015-04-14
Classification: F04D

Abstract:
1. A barrel-shaped centrifugal compressor comprising: a casing, a diaphragm located in the casing to form a flow channel, and a head flange attached to an end of the casing by a shear key, wherein the shear key is divided into several parts in a peripheral direction and arranged outside of the flow channel between the head flange and the end of the casing, and wherein in an inner peripheral surface of the casing and the outer peripheral surface of contact portions of the diaphragm and the head flange which contact with the inner peripheral surface of the casing, sliding key grooves which are vertical to the surfaces are provided in at least two portions in a peripheral direction, on a side of the flow channel across the head flange from the shear key, and sliding keys are provided in the key grooves.