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Retractable vane diffuser for compressors

a compressor and diffuser technology, applied in the direction of machines/engines, mechanical equipment, liquid fuel engines, etc., can solve problems such as sonic shock, achieve the effects of reducing noise, increasing efficiency and pressure ratio, and reducing nois

Inactive Publication Date: 2015-06-25
BORGWARNER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about a turbocharger with a special system of vanes that can be raised or lowered to control the airflow from the compressor. When the vanes are raised, they allow more air to flow through the turbocharger, which increases the efficiency and pressure ratio. When the vanes are lowered, they help prevent the airflow from becoming too high, which can cause damage to the turbocharger. The retractable vane system makes it easier to control the airflow and improve the performance of the turbocharger.

Problems solved by technology

This occurs because a leading edge of the vanes causes a sonic shock.

Method used

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  • Retractable vane diffuser for compressors
  • Retractable vane diffuser for compressors
  • Retractable vane diffuser for compressors

Examples

Experimental program
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Embodiment Construction

[0022]Referring to FIGS. 1-4, a turbocharger for an internal combustion engine is generally understood to include a compressor stage 12. The compressor stage 12 of the turbocharger can include a compressor impeller 14 and a compressor housing 16. A rotating shaft is driven by a turbine wheel such that rotation of the turbine wheel causes rotation of the compressor impeller 14.

[0023]The compressor housing 16 includes a diffuser 18 leading to a volute 20. The compressor impeller 14 is mounted on one end of the shaft and is housed within the compressor housing 16. As is known in the art, the turbine wheel is rotatably driven by an inflow of exhaust gas supplied from an exhaust manifold, which rotates the shaft, thereby causing the compressor impeller 14 to rotate. As the compressor impeller 14 rotates, air is drawn into the compressor housing 16, compressed by the compressor impeller 14, forced into the diffuser 18, and then enters the volute 20 to be delivered at an elevated pressure ...

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PUM

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Abstract

A retractable vane diffuser system (36) for a compressor stage (12) of a turbocharger with selectively retractable vanes (38). The retractable vane diffuser system (36) includes a retractable vane (38) or a set of vanes (40) that can extend into a flow path (34) of a diffuser (18) to help control airflow and change the operating characteristics of the compressor stage (12), such as improving surge margin or improving peak stage efficiency. The vanes (38) can retract preferably with a vane ring (44) into a cavity (42) of a wall (30 or 32) of the diffuser (18) when operation as a vaneless diffuser is desired to maximize flow, such as to slow onset of diffuser stall or surge. The retractable vane diffuser system (36) combines superior pressure ratio, efficiency, and lower mass air flow operating characteristics of a diffuser having vanes with higher mass airflow capacity of a vaneless diffuser.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and all the benefits of U.S. Provisional Application No. 61 / 676,467, filed on Jul. 27, 2012, and entitled “Retractable Vane Diffuser for Compressors,” which is incorporated herein by reference.BACKGROUND[0002]1. Field of the Disclosure[0003]This disclosure relates to a component for turbochargers for internal combustion engines. More particularly, this disclosure relates to a retractable vane diffuser system for a radial or mixed flow compressor stage of a turbocharger.[0004]2. Description of Related Art[0005]Advantages of turbocharging include increased power output, lower fuel consumption and reduced pollutant emissions. The turbocharging of engines is no longer primarily seen from a high power performance perspective, but is rather viewed as a means of reducing fuel consumption and environmental pollution on account of lower carbon dioxide (CO2) emissions. Currently, a primary reason for turbocharging...

Claims

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Application Information

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IPC IPC(8): F04D29/46F04D17/10
CPCF04D17/10F04D29/462F01D1/24F01D5/005F01D17/143F01D17/165F02B37/24F02B2037/125F05D2220/40F05D2250/52Y02T10/12
Inventor JENKS, GORDON
Owner BORGWARNER INC