Abstract

A mathematical model of an oilless rotary vane compressor is presented. The model takes into account the mutual influence of tribological and operating parameters of the stage. To specify conditions for the mathematical model to be unambiguous, experiments were carried out to determine the values of the friction coefficient and the maximum allowable sliding speed of promising self-lubricating materials as functions of the load and speed parameters of the compressor stage. Mathematical modeling of the integral energy characteristics of the oilless stage of the rotary vane type has shown the conceptual option to expand the range of its operation modes based on the justified use of self-lubricating materials in friction units and account of the mutual influence of tribological and operational factors. Theoretical studies have confirmed that the speed of the stage and the degree of pressure can be increased by a factor no less than 2 compared with those of commercially produced machines. However, setting the friction coefficient in modeling stages of a rotary vane type as a constant can lead to incorrect conclusions in designing in what regards the best operating and structural parameters of the stage. Increasing the speed of the oilless stage of the rotary vane type will enable a reduction in the production requirements for end clearances and an increase in the specific weight and size characteristics and the degree of pressure increase in the stage by a factor of 1.5–2 for the effective efficiency values of 0.8 or more. The proposed mathematical model makes it possible to more accurately predict the energy losses related to mechanical friction in the stages and the integral energy characteristics of the stage in a wide range of operating and design parameters.

中文翻译：

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考虑摩擦学参数和运行参数相互影响的旋片式压缩机数学模型

摘要

提出了无油旋片式压缩机的数学模型。该模型考虑了阶段的摩擦学参数和操作参数的相互影响。为了明确数学模型的条件，进行了实验以确定有前景的自润滑材料的摩擦系数和最大允许滑动速度作为压缩机级的负载和速度参数的函数。旋转叶片式无油级整体能量特性的数学模型显示了基于在摩擦单元中合理使用自润滑材料并考虑摩擦学相互影响的基础上扩大其运行模式范围的概念选择。和操作因素。理论研究证实，与商业生产的机器相比，平台的速度和压力程度可提高不少于2倍。然而，将旋转叶片类型的建模阶段中的摩擦系数设置为常数可能会导致在设计时就阶段的最佳操作和结构参数得出错误的结论。提高旋片式无油级的速度将能够减少端部间隙的生产要求，并增加特定重量和尺寸特性以及级中压力增加的程度1.5-2倍有效效率值0.8以上。