Centrifugal compressor provided with damping seal

A centrifugal compressor and damping technology, which is applied to mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as instability and expensive compressors, and achieve the effect of eliminating welding residual stress

Inactive Publication Date: 2011-09-28
YANKUANG LUNAN CHEM FERTILIZER PLANT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second technical difficulty is how to formulate corresponding solutions to solve the instability problem in a time-saving manner
But usually increasing the diameter of the rotor either makes the compressor more expensive or comes at the expense of compressor efficiency
Although reducing the span can increase the destabilizing speed, this is subject to many constraints, so it is still very limited

Method used

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  • Centrifugal compressor provided with damping seal
  • Centrifugal compressor provided with damping seal
  • Centrifugal compressor provided with damping seal

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Such as figure 1 As shown, a centrifugal compressor with a damping seal, which includes a centrifugal compressor rotor 1, a first distance sleeve 2, a centrifugal impeller 3, a diaphragm and a balance disk damping seal 4, a second distance sleeve 6, a balance Disk 7. The balance disc 7 is located in the middle of the rotor 1 of the centrifugal compressor, and the damping seal 4 is used at the gap between the balance disc 7 and the compressor casing or at the gap between the mouth ring of the centrifugal impeller 3 and the compressor diaphragm. The seal 4 is installed on the stator (which is the stationary part during the operation of the compressor). On the balance disc 7, labyrinth seal teeth can be housed, also can be smooth. In the present invention, as figure 2 As shown, the damping seal is made of non-ferrous metal as a whole, and its p...

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PUM

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Abstract

The invention relates to a centrifugal compressor provided with damping seal. The damping seal is adopted at a balancing disc position and an impeller ring position and is formed by integratedly processing aluminum and an aluminum alloy material or copper and a copper alloy material; a plurality of regular hexagonal counter holes are arranged in the inner surface of the damping seal; a plurality of teeth are arranged on the periphery of one side of the damping seal; the inner surface of the damping seal is a conical surface; and the gap between high-pressure sides of the damping seal is larger than the gap between low-pressure sides of the damping seal. By adopting the sealed centrifugal compressor, the circumferential speed of fluid in the sealing gap is lower than that of the ordinary labyrinth sealed compressor, the disturbance of the fluid in the seal to a compressor rotor can be effectively reduced, and higher damping is input into a rotor system to improve the stability of the compressor.

Description

technical field [0001] The invention relates to a centrifugal compressor, in particular to a centrifugal compressor provided with a damping seal. Background technique [0002] At present, rotor instability usually means that when the speed reaches a certain value, it is in a critical state. At this time, if a small disturbance is encountered, the rotor vibration may suddenly intensify, causing a breakdown of the car. Since the 1960s, with the increase of the power and speed of centrifugal compressors, some problems that are weak at low speed and low power have gradually become more and more prominent, and the stability problem is particularly prominent. In recent decades, although the engineering and scientific circles have paid great attention to the stability of compressors, cases of compressor instability still occur from time to time. This kind of fault is a relatively stubborn fault, and once it occurs, it will require a major transformation of the unit. [0003] In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/26
Inventor 杨贵州王维民张永祥颜芳芮胜波张涛孙淑杰
Owner YANKUANG LUNAN CHEM FERTILIZER PLANT
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