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Compressor having port shroud for flow recirculation and noise attenuator and turbocharger incorporating compressor

A technology of turbochargers and compressors, which is applied to parts of pumping devices for elastic fluids, machines/engines, liquid fuel engines, etc., and can solve problems such as loud noise and troubles

Inactive Publication Date: 2021-03-05
盖瑞特动力科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, applicants have discovered that in some cases the noise associated with compressor blade pass frequencies may tend to be louder than desired under certain operating conditions
For example, in the case of a turbocharger that employs a centrifugal compressor and is installed in the engine compartment of a car or truck, at certain operating points the compressor blade pass frequency noise may tend to be annoying to the occupants of the vehicle

Method used

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  • Compressor having port shroud for flow recirculation and noise attenuator and turbocharger incorporating compressor
  • Compressor having port shroud for flow recirculation and noise attenuator and turbocharger incorporating compressor
  • Compressor having port shroud for flow recirculation and noise attenuator and turbocharger incorporating compressor

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Embodiment Construction

[0021] The present disclosure will now be described in greater detail with reference to the aforementioned drawings, which depict some, but not all, embodiments of the inventions to which this disclosure pertains. These inventions may be embodied in various forms, including forms not expressly described herein, and should not be construed as limited to the specific exemplary embodiments described herein. In the following description, like reference numerals refer to like elements throughout.

[0022] exist figure 1 A turbocharger 10 with a compressor according to a first embodiment of the invention is depicted in figure 2 The compressor housing of the turbocharger is depicted. The turbocharger includes a compressor wheel 12 mounted within a compressor housing 22 and having a hub 14 and a plurality of circumferentially spaced blades 16 connected to and extending generally radially from the hub. extend outside. Each blade has a root 18 attached to the hub and an opposing ti...

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Abstract

The invention relates to a compressor having a port shroud for flow recirculation and having a noise attenuator for blade pass frequency noise attenuation and a turbocharger incorporating the same. The compressor includes a compressor housing containing a compressor wheel and defining an inlet duct that leads air into the compressor wheel, and a wheel shroud located adjacent the blade tips and extending upstream from the blades. An annular space is defined between the wheel shroud and an inner surface of the inlet duct. The wheel shroud defines a bleed port that extends into the annular spaceto bleed a portion of the air entering the compressor wheel into the annular space to be recirculated back into the main flow. The noise attenuator for attenuating compressor blade passing frequency noise is formed as a blind slot located opposite the bleed port and extending for a length L from the radially inner surface of the inlet duct toward the radially outer surface of the inlet duct.

Description

technical field [0001] The present disclosure relates to centrifugal compressors for compressing a fluid, such as air, and wherein surge of the compressor is controlled by bleeding a portion of the at least partially compressed fluid and recirculating the portion to the compressor inlet. The present disclosure relates more particularly to arrangements for attenuating compressor blade pass frequency noise in such centrifugal compressors. Background technique [0002] Centrifugal compressors are used in a variety of applications to compress fluids. Single-stage centrifugal compressors can achieve peak pressure ratios higher than 5.0 and are much more compact in size than axial compressors with equivalent pressure ratios. Therefore, centrifugal compressors are commonly used in turbochargers for improving the performance of gasoline and diesel engines of vehicles. [0003] In turbocharger applications, it is important that the compressor has a wide operating range, as measured...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/42F04D29/44F04D29/66
CPCF04D29/4206F04D29/4213F04D29/441F04D29/665F05D2220/40F04D29/685F04D27/0215F04D29/663
Inventor 戴伟李晓东刘高锋
Owner 盖瑞特动力科技(上海)有限公司
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