新型无油涡旋压缩机内部热力学特性和性能测试

doi:10.13229/j.cnki.jdxbgxb20210465

摘要/Abstract

摘要：

基于变质量系统热力学和控制容积法，构建了涡旋压缩机工作过程热力学模型。基于计算流体动力学方法对涡旋压缩机内部流场进行三维非稳态数值模拟计算，得到了涡旋压缩机工作腔内流体温度、压力、速度以及进出口流量的变化规律，并通过所搭建的试验平台测试了试验样机在不同排气压力时的进/出口流量、排气温度和机体振动值的变化趋势。结果表明：同时考虑泄漏和热传递的热力学模型更加符合涡旋压缩机的实际工作过程，由于相邻工作腔之间的质量交换，工作腔内的温度和流速分布不均匀；在不同排气压力下，涡旋压缩机进、出口容积流量最大差值为0.15 $m 3 / m i n$ ，涡旋压缩机排气口温度最大温差为19 ℃。

关键词: 涡旋压缩机, 热力学模型, 内泄漏和热传递, 计算流体动力学, 数值模拟

Abstract:

A thermodynamic model for the scroll compressor's working process is developed based on the thermodynamics of the variable mass system and the control volume method. The unsteady numerical simulation of the compressor's internal flow field was performed using the CFD （Computational Fluid Dynamics） method. The temperature， pressure， velocity， and mass flow of the fluid in the working chamber change were obtained. The test platform is built to test the inlet and outlet volume flow， discharge temperature， driving motor temperature and body vibration value of the prototype change trend. The results show that the thermodynamic model of leakage and heat transfer is more in line with the actual working process of scroll compressor. Because of the mass exchange between adjacent working chambers， the temperature and velocity distribution in the working chamber will be uneven. Under scroll compressor different discharge pressures， the maximum difference between the inlet and outlet volume flow of the scroll compressor is 0.15 $m 3 / m i n$ ， and the maximum temperature difference between the discharge temperature of the scroll compressor is 19 ℃.

Key words: scroll compressor, thermodynamic model, internal leakage and heat transfer, computational fluid dynamics, numerical simulation

中图分类号:

TH455

孙健,彭斌,朱兵国. 新型无油涡旋压缩机内部热力学特性和性能测试[J]. 吉林大学学报(工学版), 2022, 52(12): 2778-2787.

Jian SUN,Bin PENG,Bing-guo ZHU. Internal thermodynamic characteristics and performance test of new oil⁃free scroll compressor[J]. Journal of Jilin University(Engineering and Technology Edition), 2022, 52(12): 2778-2787.

图/表 17

表1

涡旋压缩机几何参数"

参数	数值
基圆半径 $r b$ /mm	3.676
渐开线发生角 $α$ /rad	0.680
偏心距 $r o r$ /mm	7.150
涡旋齿齿高h/mm	25.000
渐开线终端展角 $φ e$ /rad	26.627

表1

图1

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表2

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图15

参考文献 20

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流体域名称	总单元数	总结点数
总计	3 079 829	1 380 590
进气管	16 744	14 525
工作腔	3 049 561	1 350 640
排气管	13 524	15 425

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