一种新型变壁厚涡旋型线的构建理论

doi:10.13229/j.cnki.jdxbgxb20190588

摘要/Abstract

摘要：

在深入研究涡旋压缩机型线构造方式的基础上，提出了一种利用Frenet活动标架构建涡旋型线的新方法，利用该方法构建了一种新型的变壁厚涡旋型线，并建立了该型线的基本几何理论，详细推导了工作腔容积。在此基础上引入了压缩比、面积利用系数、轴向气体力和切向气体力4个性能指标，对其性能进行评估。结果表明：在相同几何参数条件下，与传统的变壁厚涡旋型线相比，新型变壁厚涡旋型线的各项性能均较优，不但压缩比和面积利用系数分别提高了7.15%和4.84%，而且所受的轴向气体力和切向气体力也明显较小。可见，采用新型的变壁厚涡旋型线有助于进一步提高涡旋压缩机的性能。

关键词: 机械设计, 涡旋压缩机, Frenet活动标架, 变壁厚涡旋型线, 几何理论, 性能指标, 气体力

Abstract:

On the basis of in-depth study of scroll compressor profile construction, a new method for constructing scroll profiles using Frenet moving frame was proposed, a new type of variable wall thickness scroll profile was constructed by this method. The basic geometrical theory of the profile was established and the working chamber volume was also derived. On this basis, four performance indexes including compression ratio, area utilization coefficient, axial gas force and tangential gas force were introduced to evaluate its performance. The results show that under the same geometrical parameters, the newly constructed variable wall thickness scroll profiles have better performance than traditional variable wall thickness scroll profile. Not only the compression ratio and the area utilization coefficient are increased by 7.15% and 4.84% respectively, but also the axial gas force and tangential gas force are also significantly smaller. It can be seen that the use of this variable wall thickness scroll profile helps to further improve the performance of the scroll compressor.

Key words: mechanic design, scroll compressor, Frenet moving frame, variable wall thickness scroll profile, geometrical theory, performance index, gas force

中图分类号:

TH45

侯才生,刘涛,郭李先. 一种新型变壁厚涡旋型线的构建理论[J]. 吉林大学学报(工学版), 2020, 50(5): 1627-1634.

Cai-sheng HOU,Tao LIU,Li-xian GUO. Construction theories of a new type of variable wall thickness scroll profile[J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(5): 1627-1634.

图/表 11

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表1

两种型线几何性能对比"

型线类型	压缩比 $ν$	面积利用系数 $ε$
$Δ$ /%	7.15	4.84
传统变壁厚涡旋型线	8.571	0.640
新型变壁厚涡旋型线	9.184	0.671

表1

图9

图10

参考文献 12

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