Method for accurately straightening spindle of centrifugal compressor in cold state

A technology for centrifugal compressors and spindles, which is applied in metal processing, metal processing equipment, manufacturing tools, etc., and can solve problems such as the influence of the mechanical properties of the spindle

Inactive Publication Date: 2019-01-01
SHENYANG TURBO MASCH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the precision control problem of correcting the micro-deformed spindle in the cold state, the present invention solves the problem of affecting the mechanical properties of the spindle when corrected by heating

Method used

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  • Method for accurately straightening spindle of centrifugal compressor in cold state
  • Method for accurately straightening spindle of centrifugal compressor in cold state

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specific Embodiment

[0030] 1. The material of the main shaft is 1Ni9 material, the thickest diameter is 320mm, the main shaft is bent after cryogenic treatment, the maximum deflection is 0.70mm after the meter is measured, it is located in the middle, and the deflection on both sides is digitally decreasing. Using the main shaft correction scheme of the present invention, the normal direction The main shaft produces a plastic correction effect after the compression deformation is 6mm. After many times of correction and measurement, the deflection value after correction is 0.05mm, and the correction amount is 0.65mm, which meets the requirements of use. It passed the high-speed dynamic balance smoothly, and the vibration value of the test run meets the requirements. on the product.

[0031] 2. The material of the main shaft is 1Ni9 material, the thickest diameter is 330mm, the main shaft is bent after cryogenic treatment, the maximum deflection is 0.68mm after the meter is measured, it is located i...

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Abstract

The invention provides a method for accurately straightening a spindle of a centrifugal compressor in a cold state. The method for accurately straightening the spindle of the centrifugal compressor inthe cold state comprises the following steps that a suitable-size straightening press is selected; a set of auxiliary straightening tools is designed and manufactured, the auxiliary straightening tools are adopted to clamp the spindle, and press straightening treatment is carried out by using the press; during the straightening process, the deflection variation quantity in spindle straightening engineering is measured; and after straightening is completed, vibration aging equipment is used for eliminating the residual stress after spindle pressing. According to the method for accurately straightening the spindle of the centrifugal compressor in the cold state, a precision straightening tool, an overvoltage prevention protective device, a precision measurement tool and bill during the straightening process, and subsequent schemes for eliminating cold deformation residual stress are designed, The method for accurately straightening the spindle of the centrifugal compressor in the cold state can be applied to straightening of the plastic deflection deformation produced in the production process of the spindle of the centrifugal compressor under different working conditions and materials, and ensure that the straightened spindle fully meets the design using requirements.

Description

technical field [0001] The invention relates to the technical field of centrifugal compressors, in particular to a method for accurately correcting the main shaft of a centrifugal compressor in a cold state. Background technique [0002] The main shaft is one of the core components of the centrifugal compressor. The accuracy requirements of the finishing main shaft are very strict. Any small size and shape change will affect the stability of the whole centrifugal compressor unit. However, the centrifugal compressor main shaft adopts flexible The long diameter of the shaft structure is relatively large, the rigidity is insufficient, and it is relatively easy to deform. [0003] In the process of heat treatment and hot loading of the main shaft, inelastic bending of the main shaft often occurs, and this deformation is often very small. The deflection of the meter on the balancing machine varies from a dozen to dozens of lines (one is 0.01mm) The general accuracy of the genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D3/00B21C51/00
CPCB21C51/00B21D3/00
Inventor 张思宇胡冰张江楠冯魁
Owner SHENYANG TURBO MASCH CORP
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