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Centrifugal compressor including diffuser pressure equalization feature

A technology of centrifugal compressors and diffusers, which is applied in the direction of machines/engines, mechanical equipment, non-variable pumps, etc., and can solve problems such as the negative impact of compressor operation, affecting the upstream space of impellers and diffuser inlets, etc.

Active Publication Date: 2021-01-15
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Uneven pressure supply to the diffuser affects the upstream space between the impeller and the diffuser inlet and can negatively affect the operation of the compressor

Method used

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  • Centrifugal compressor including diffuser pressure equalization feature
  • Centrifugal compressor including diffuser pressure equalization feature
  • Centrifugal compressor including diffuser pressure equalization feature

Examples

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Embodiment Construction

[0030] figure 1 An exemplary centrifugal compressor 10 is shown schematically, according to one example. As shown, centrifugal compressor 10 includes an inlet 14 . The inlet 14 directs fluid into a rotating impeller 16 through a plurality of inlet guide vanes. The drive shaft 20 is connected to the impeller 16 and drives the rotation of the impeller 16 . The impeller 16 defines a shroud side 2 and a hub side 4 .

[0031] The impeller 16 defines a plurality of distinct passages 22, each of which diverts incoming fluid from an axial flow direction to a radial flow direction. Passage 22 discharges fluid from impeller 16 into diffuser section 30 through a plurality of diffuser section inlets 32 . Diffuser section 30 is disposed generally circumferentially about impeller 16 and directs compressed fluid toward the compressor outlet. In one example, the fluid is directed into a volute which directs the fluid to the compressor outlet (see image 3 ).

[0032] Due to the differe...

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PUM

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Abstract

A centrifugal compressor includes an impeller configured to drive fluid along a fluid flowpath via a plurality of discrete passages. Each of the discrete passages includes a discrete passage exit. A diffuser portion is disposed circumferentially about the impeller. The diffuser portion includes a plenum connected to each exit of the discrete passages via a plurality of diffuser inlets and an equalization plenum defined adjacent to the impeller. The equalization plenum is fluidly connected to each discrete passage exit via a corresponding slot.

Description

technical field [0001] The present disclosure relates generally to compressor centrifugal compressors, and more particularly to centrifugal compressors including discharge pressure equalization features. [0002] Cross References to Related Applications [0003] This application claims priority to U.S. Provisional Application No. 62 / 847360, filed May 15, 2019. Background technique [0004] Rotary machines such as centrifugal compressors are commonly used in refrigeration and turbine applications. A centrifugal compressor includes an impeller that drives and compresses fluid and provides the compressed fluid to a discharge plenum (sometimes called a plenum). The discharge plenum distributes the compressed fluid to a system configured to utilize the compressed fluid. An uneven pressure supply to the diffuser affects the upstream space between the impeller and the diffuser inlet and can negatively affect the operation of the compressor. [0005] Centrifugal compressors have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/44F04D17/10F04D29/68
CPCF04D17/10F04D29/441F04D29/681F05D2250/51F04D29/083
Inventor V·M·西什特拉W·T·库辛斯
Owner CARRIER CORP