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Rotor dynamic performance computing method of DH type turbine compressor

A technology of rotor dynamics and turbo compressors, applied in vibration testing, mechanical bearing testing, testing of mechanical components, etc., can solve problems such as inability to guarantee normal operation

Inactive Publication Date: 2010-06-23
朱爱斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design of this type of system has been using the design method of rotor design alone in the past, ignoring the coupling relationship between each rotor. This design method can only ensure that each rotor can run stably when it is used alone, but it cannot guarantee normal operation after coupling. run

Method used

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  • Rotor dynamic performance computing method of DH type turbine compressor
  • Rotor dynamic performance computing method of DH type turbine compressor
  • Rotor dynamic performance computing method of DH type turbine compressor

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Embodiment Construction

[0095] A preferred embodiment of the present invention is as follows:

[0096] A DH type turbocompressor is a typical application of a gear-coupled sliding bearing-rotor system, such as figure 1 As shown, the middle large gear is a driving wheel, two driven pinion gears are arranged in parallel on both sides, and three or four impellers are respectively installed on the low-speed pinion shaft and the high-speed pinion shaft.

[0097] Drive shaft, low speed gear shaft and high speed gear shaft Figure 6 ~ Figure 8 As follows, the number of gear teeth is 269, 55 and 41, the input speed of the drive shaft is 2988r / min, and the input power is 2500kW. The influence of gear coupling on the system dynamics is considered in the calculation and analysis of the shafting.

[0098] At the operating speed, the first 8 mode modes of the shaft system are as follows: Figure 9 to Figure 16 As shown, it can be seen that they correspond to the individual shaft modes or generate new modes, and...

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Abstract

The invention relates to a rotor dynamic performance computing method of a DH type turbine compressor, which comprises the following concrete steps of: (1) selecting an analysis object and a computation type, inputting the parameter of a bearing-rotor system, and completing pre-treatment operations such as discretization and the like of a rotor system; (2) invoking a bearing computation program, computing the dynamic and static characteristic parameters of each bearing, building a rotor dynamic equation of a parallel axis system, which takes gear mesh into consideration, according to the selected analysis object and the computation type, and (3) invoking a solving function to compute a characteristic value and a characteristic vector of a dynamic differential equation, and completing the computation and the analysis of system stability, critical speed and forced vibration response as well as a vibration mode through converting dimension into dynamic characteristic result data. The invention develops a computation analysis method of dynamic performance of multiple parallel axis systems, which can be applied to engineering reality, based on a solid theoretical research, the computed rotor system comprises supports of various types, and the combination of bearing computation and rotor system dynamic analysis is better realized.

Description

technical field [0001] The invention relates to a method for calculating rotor dynamic performance, in particular to a method for calculating rotor dynamic performance of a DH type turbo compressor. Background technique [0002] In the gear-coupled bearing-rotor system, multiple shaft systems are coupled together through gears. The system has new characteristics caused by gear transmission. After the lateral vibration is transmitted through the gears, the rotor will cause torsional vibration, that is, bending-torsion coupling vibration occurs. Multi-parallel shaft systems with gear meshing are widely used in fans, compressors, speed increasers and other machines. One of the typical applications of the gear-coupled bearing-rotor system is the twin-shaft turbocompressor, also known as the DH turbine. Compressor, its bearing-rotor system such as figure 1 shown. [0003] The meshing effect of the gears connects multiple bearing-rotor systems that are originally independent of ...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01M13/04G01M7/02
Inventor 朱爱斌丘大谋张莉娟张锁怀
Owner 朱爱斌