共查询到18条相似文献,搜索用时 140 毫秒
1.
2.
3.
4.
5.
6.
提出了一种新型静止叶片式空气压缩机,该压缩机具有一个做摆动运动的转子和一个静止不动的叶片,叶片的外端与气缸的内孔壁面密封紧固连接,叶片的侧端与端盖密封紧固连接,借此减少了气体直接从压缩腔向吸气腔窜逸的通道,有效地消除了压缩机在这些部件间的泄漏损失和摩擦损耗。介绍了压缩机的结构特点及工作原理,建立了压缩机的数学模型。研究表明:转子的扭摆惯性力矩对滑块与叶片运动副的摩擦及磨损有较大影响,应减小转子的转动惯量以降低滑块与叶片间的接触力;转子与端盖的轴向间隙对压缩机内部泄漏损失十分敏感,应采取轴向密封措施以减少转子轴端处的泄漏量。 相似文献
7.
8.
以转子压缩机为例,给出总摩擦功耗占比最高的三大摩擦损失计算公式,并迭代求解滚动活塞角速度,联立滚动活塞与滑片顶端之间的接触力。利用MATLAB软件实现计算过程,研究润滑油黏度、主轴转速、活塞质量、气缸高径比、滚动活塞与气缸端盖间隙等因素对压缩机三大摩擦损失的影响。结果表明:主轴转速对滚动活塞与偏心轮之间的摩擦损失影响较大,且随着转速的增大,摩擦损失也增大;活塞质量对滑片端部与滚动活塞外表面之间的摩擦损失影响最小;滑片与滑片槽之间的摩擦损失随着主轴转速、气缸高径比的增大而增大。该研究为降低各摩擦副处的摩擦损失及总摩擦功耗提供了参考和借鉴。 相似文献
9.
10.
11.
12.
13.
The rolling piston type rotary compressor has been widely used for refrigeration and air-conditioning systems due to its compactness
and high-speed operation. The present analysis is part of a research program directed toward maximizing the advantages of
refrigerant compressors. The study of lubrication characteristics in the critical sliding component is essential for the design
of refrigerant compressors. Therefore, theoretical investigation of the lubrication characteristics of a rotary compressor
being used for refrigeration and air-conditioning systems was investigated. The Newton-Raphson method was used for a partial
elastohydrodynamic lubrication analysis between the vane and the rolling piston of a rotary compressor. The results demonstrated
that the vane thickness and the center line position of the vane significantly influenced the friction force and the energy
loss between the vane and the rolling piston. 相似文献
14.
The rolling piston type rotary compressor has been widely used for refrigeration and air-conditioning systems due to its compactness
and high-speed characteristics. However, it is necessary to develop alternative refrigerants that can guarantee environmental
protection. In addition, advanced refrigerant compressors must be further developed to overcome the compatibility problems
inherent in refrigeration and air-conditioning systems. The refrigerant compressor is the most important mechanical component,
which determines the performances of refrigeration and air-conditioning systems. Therefore, we theoretically investigated
the lubrication characteristics of the rotary compressor currently used in both refrigeration and air-conditioning systems
with an alternative refrigerant. In the theoretical investigation, the Runge-Kutta method is used to analyze the behavior
of a rolling piston in the rotary compressor. Subsequently, the Newton-Raphson method is used, which provided good performance
in the analysis of the elastohydrodynamic lubrication of the line contacts between a rolling piston and a vane in the rotary
compressor. The results demonstrate that the alternative refrigerants influence the friction force and the energy loss between
the vane and the rolling piston. 相似文献
15.
16.
Ihn-Sung Cho Seok-Hyung Oh Jae-Youn Jung 《Journal of Mechanical Science and Technology》2001,15(5):562-568
The rolling piston type-rotary compressor has been widely used for refrigeration and air-conditioning systems due to its compactness
and high-speed operation. The present analysis is part of a research program directed toward maximizing the advantages of
refrigerant compressors. The study of lubrication characteristics in critical sliding components is essential for the design
of refrigerant compressors. Therefore, theoretical investigation of the lubrication characteristics of a rotary compressor
used for refrigeration and air-conditioning systems was studied. The Newton-Raphson method was used for the partial elastohydrodynamic
lubrication analysis between the vane and the rolling piston of a rotary compressor. The results showed that the rotational
speed of a shaft and the discharge pressure significantly influence the friction force and the energy loss between the vane
and the rolling piston. 相似文献
17.
18.
提出一种新型往复活塞式无油润滑空气压缩机,在传统曲柄连杆机构的基础上增设一个摆杆机构,以此约束连杆和活塞以近乎直线往复的方式进行工作,从而缓解活塞及密封环对气缸的侧压力与敲击强度。与传统机型相比较,新型压缩机摩擦功减小了7.4%,噪声下降约1dB(A),密封环寿命提高约10%,高度降低24%。建立了新型压缩机的数学模型,对其摆杆约束机构的特性进行了分析。研究表明:增设摆杆可以大幅度地减小活塞及密封环相对于气缸的摆动幅度,有利于降低它们对气缸的侧压力和敲击强度;另外,曲柄的运转方向对摆杆机构的运动学特性和动力学特性影响较为明显,将机构的急回行程与压缩机的进气行程呼应设置有利于改善摆杆的受力状况。 相似文献