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Centrifugal compressor

A centrifugal compressor and impeller technology, applied in mechanical equipment, non-variable-capacity pumps, non-displacement pumps, etc., can solve the problems of production cost, waste of operation time, etc., and achieve the reduction, suppression and elimination of static pressure recovery. Uneven velocity distribution, effect of reducing stagnation area

Inactive Publication Date: 2014-08-20
MITSUBISHI HEAVY INDUSTIES COMPRESSOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, in the above-mentioned device, it is necessary to install a new mechanism in the diffuser, which may lead to waste of production cost and working time.

Method used

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Examples

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Embodiment 1

[0040] Combine figure 1 The device according to Embodiment 1 of the present invention will be described. This device is the same as a conventional centrifugal compressor, and mainly includes a suction port 1, an impeller 2, a hub 3, a rotating shaft 4, a diffuser 5, and a scroll 6. The impeller 2 is connected to the rotating shaft 4 via the hub 3. In addition, the diffuser 5 is arranged downstream of the impeller 2, the flow path faces away from the rotating shaft 4, and the outlet faces the radial direction of the meridian surface. Furthermore, the scroll 6 is arranged at The downstream of the diffuser 5 is connected to the outlet of the diffuser 5. It should be noted that the rotating shaft 4 and the scroll 6 are figure 1 Not shown in, but the same as the prior art.

[0041] Furthermore, similar to the prior art, the suction port 1 has a function of guiding gas to the impeller 2. The gas guided to the impeller 2 rotates the impeller 2 by the rotating shaft 4, so that the ga...

Embodiment 2

[0051] The device related to Embodiment 2 of the present invention is an improved device of the device related to Embodiment 1. Figure 4 The difference between the device in Example 1 and this device is shown. In the device according to Embodiment 1, the diffuser inlet hub side line 5a is a straight line. Therefore, when the outlet of the diffuser 5 is directed in the radial direction, the angle of the diffuser 5 must be changed at a certain point. Thus, as Figure 4 As shown, a stagnation area 11 where the flow of gas is stagnant is formed. Shear stress acts between the gas accumulated in the stagnation area 11 and the flowing gas, which may cause energy loss. This device is a device that reduces the retention area 11.

[0052] This device is the same as the device involved in embodiment 1 and the prior art, such as image 3 The shown mainly includes a suction port 1, an impeller 2, a hub 3, a rotating shaft 4, a diffuser 5, and a scroll 6. The impeller 2 is connected to the ...

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Abstract

A centrifugal compressor for which theta-alpha > 0 DEG and 0 DEG < theta < 34 DEG, when the angle formed by a diffuser inlet hub-side line (5a) and the radial direction at a point B in the meridian plane is theta, and the angle formed by a tangent line (3b) and the radial direction at a point A of an impeller hub-side line (3a) nearest the inlet of the diffuser (5) is alpha. Thus, skewing of the velocity distribution of a gas within the diffuser of the centrifugal compressor is eliminated.

Description

Technical field [0001] The invention relates to a centrifugal compressor, in particular to a centrifugal compressor with a large flow. Background technique [0002] In products such as superchargers, gas turbines, and industrial compressors, it is a major issue to achieve large flow rates with improved performance. The term "increasing the flow rate in a centrifugal compressor" refers to increasing the discharge flow rate in a compressor of the same casing size, and further, an impeller of the same outer diameter. [0003] As a problem accompanying this increase in flow rate, there is a reduction in efficiency. Therefore, the technology to achieve a large flow rate while suppressing the reduction in efficiency is of great significance in the industrial field. [0004] use Image 6 The existing centrifugal compressor will be described. The conventional centrifugal compressor mainly includes a suction port 1, an impeller 2, a hub 3, a rotating shaft 4, a diffuser 5, and a scroll 6. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/44
CPCF04D17/10F04D29/441F04D29/284F04D29/444
Inventor 山下修一
Owner MITSUBISHI HEAVY INDUSTIES COMPRESSOR CORP
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