Integrally geared turbomachinery system with at least two impellers having different rotating speeds

EP4751005A1Pending Publication Date: 2026-06-03NUOVO PIGNONE TECH SRL
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
NUOVO PIGNONE TECH SRL
Filing Date
2024-07-23
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Existing integrally geared turbomachinery systems are limited by the bull gear's technological constraints, which restrict the gear ratio and result in impellers operating at suboptimal speeds, leading to inefficient operation and reduced flow coefficients.

Method used

The system employs a stepped wheel gear with two portions of different diameters, allowing each pinion shaft to rotate at a unique speed, thereby optimizing the operation of each impeller without increasing the system's footprint.

Benefits of technology

This configuration enables each impeller to operate at its optimal speed, maximizing efficiency and maintaining a reduced footprint, thus overcoming the limitations imposed by traditional bull gear systems.

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    Figure EP2024025221_30012025_PF_FP_ABST
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Abstract

Integrally geared turbomachinery system (200, 300) comprising a wheel gear (90) configured to rotate around a rotating axis (R) and at least a couple of pinion shafts (10, 20) which are mechanically coupled to the wheel gear (90) and which have respectively a first axis (X) and a second axis (Y) coincident with each other and parallel to the rotating axis (R). The wheel gear (90) comprises a first portion (91) having a first diameter and a second portion (92) having a second diameter which is smaller than the first diameter. A first pinion shaft (10) is mechanically coupled to the first portion (91) of the wheel gear (90) and is configured to rotate around the first axis (X) at a first rotational speed. A second pinion shaft (20) is mechanically coupled to the second portion (92) of the wheel gear (90) and is configured to rotate around the second axis (Y) at a second rotational speed which is different from the first rotational speed.
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