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Variable geometry diffuser mechanism

A diffuser and variable technology, applied in the direction of machines/engines, mechanical equipment, connecting components, etc., can solve the problems of increased cost, expensive, etc., and achieve the effect of loose tolerance, easy and cheap replacement, and reduced cost

Active Publication Date: 2006-03-08
JOHNSON CONTROLS AIR CONDITIONING & REFRIGERATION WUXI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although very effective, this method is expensive as the protrusions must be placed precisely within the enclosure
Threaded shaft and motor for shaft rotation also add to the cost of this assembly

Method used

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  • Variable geometry diffuser mechanism
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  • Variable geometry diffuser mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The present invention is a diffuser mechanism with variable geometric structure for centrifugal compressors. Figure 1 shows a variable displacement centrifugal compressor with various diffuser structures in the prior art. The prior art systems use the movable wall as an annular ring placed near the outlet of the impeller. As always, the wall can be moved into the diffuser space to control fluid flow through the diffuser. The annular ring is placed on the substrate. The annular ring is connected to a complex support structure for moving the wall, which includes an annular push ring and a pin connected to the wall. The drive ring is mounted on the base plate via a ball bearing device. The drive ring pushes the annular push ring, which in turn moves the wall. The ball bearing device moves in the raceway in the drive ring and the inclined raceway in the base plate. The rotational movement of the drive ring causes the movable wall to move axially into or out of the diffuser spac...

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PUM

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Abstract

A compressor (100) includes an impeller (124) rotatably mounted in a housing (120) and a base plate (126) fixed to the housing (120) adjacent the impeller (124). The base plate (126) cooperates with the housing (120) to define a diffuser gap (134). The base plate (126) includes a plurality of mechanism support blocks (180). A drive ring (250), mounted to the support blocks (180), is rotationally moveable with respect to the support blocks (108) and the base plate (126). Connected to the drive ring (250) is a diffuser ring (130) that moves in response to movement of the drive ring (250). The diffuser ring (130) can be positioned at any location between a retracted position that is not within the diffuser gap (134) and an extended position within the diffuser gap (134) to constrict the gap opening to control the amount of fluid flowing through the diffuser gap (134).

Description

Invention field [0001] The present invention relates to a centrifugal compressor, and more particularly to a system for controlling the flow in a diffuser of a variable displacement turbo compressor. Background technique [0002] Centrifugal compressors are used in various equipment that need to compress fluids. For example, the equipment includes a turbine, a pump, and a cooler. The compressor operates by passing fluid through a rotating impeller. The impeller acts on the fluid to increase the fluid pressure. Because the operation of the impeller creates a negative pressure gradient in the flow, many compressor designs include a diffuser placed at the outlet of the impeller to stabilize the fluid flow. [0003] It is often necessary to change the amount of fluid flowing through the compressor or to change the pressure difference generated by the compressor. However, when the flow rate of the fluid through the compressor decreases and the same pressure difference is maintained ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/46F04D27/02
CPCF04D27/0253F04D29/464F05D2250/52F04D29/002F04D29/056F04D17/08F16B5/02F05D2210/12Y10S415/00Y10S417/00
Inventor 库尔特·南斯蒂尔
Owner JOHNSON CONTROLS AIR CONDITIONING & REFRIGERATION WUXI