Experimental study on law of mass transfer separation of grease

Qiang ZHANG; Liangbi WANG

doi:10.11949/0438-1157.20190594

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Experimental study on law of mass transfer separation of grease

Separation engineering | 更新时间：2020-06-24

- Experimental study on law of mass transfer separation of grease
- CIESC Journal Vol. 70, Issue S2, Pages: 294-300(2019)
- 作者机构：
  
  1.兰州交通大学机电工程学院，甘肃兰州 730070
  2.铁道车辆热工教育部重点实验室，甘肃兰州 730070
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190594
  CLC： TQ 021.4
- Received：29 May 2019，
  
  Revised：2019-06-06，
  
  Published：05 September 2019
- 稿件说明：
移动端阅览
张强, 王良璧. 润滑脂传质分离特性规律实验研究[J]. 化工学报, 2019, 70(S2): 294-300

ZHANG Qiang, WANG Liangbi. Experimental study on law of mass transfer separation of grease[J]. CIESC Journal, 2019, 70(S2): 294-300
张强, 王良璧. 润滑脂传质分离特性规律实验研究[J]. 化工学报, 2019, 70(S2): 294-300 DOI： 10.11949/0438-1157.20190594.

ZHANG Qiang, WANG Liangbi. Experimental study on law of mass transfer separation of grease[J]. CIESC Journal, 2019, 70(S2): 294-300 DOI： 10.11949/0438-1157.20190594.

摘要

目前，约有80%的滚动轴承采用脂润滑，润滑脂流变特性造成了基础油的迁徙，这种迁徙实质就是基础油在润滑脂内的传质过程。滚动轴承中润滑脂的传质过程对轴承润滑有非常重要的影响，在此过程中，由于基础油在润滑脂内的迁徙，造成了润滑脂内基础油的含量分布不均匀，使得局部区域内出现了富油和贫油的分布。本文采用灰分分析法对不同转速和位置润滑脂的传质情况进行了离心分离实验研究，对润滑脂的传质规律进行了详细研究。研究结果表明：当转速为100 r/min时，经过较长时间运行，基础油传质现象明显；当转速为200～800 r/min时，在内部位置基础油含量较高，靠近边缘位置基础油含量较低，出现贫油状态；当转速1000 r/min运行时，基础油发生了含量由高到低再变高的过程，基础油迁徙过度造成了贫油状况。在内部和中间位置，当转速为800 r/min时会出现较为明显的贫油状态，在边缘位置，转速为100、400和600 r/min会出现较为明显的贫油状态。这些研究结果为滚动轴承脂润滑的进一步研究奠定了基础。

Abstract

At present

about 80% of rolling bearings are greased. The rheological properties of grease have an extremely important influence on the lubrication of rolling bearings. The rheological properties of grease cause the migration of base oil. The essence of this migration is the mass transfer process of the base oil in the grease. The mass transfer process of the grease in the rolling bearing has a very important influence on the lubrication of the bearing. In this process

due to the migration of the base oil in the grease

the distribution of the base oil in the grease is uneven

which causes the appearance of local areas with rich or lean oil. In this paper

the ash analysis method is used to study the mass transfer of grease at different rotation speeds and positions. The experimental conditions of different rotation speeds at different positions are experimentally studied by setting up the mass transfer separation characteristics test bench. The experimental rotation speeds of the separator are 100

200

400

600

800

1000 r/min. At each rotation speed

the separation time was 0.5

1 and 2 h. The grease is subjected to high-temperature sintering in a crucible to completely burn and decompose the grease

and the specific gravity of the ash and the grease is analyzed to determine the content of the base oil in the grease. The mass transfer phenomenon of grease is experimentally analyzed in detail. The research results show that when the rotation speed is 100 r/min

the mass transfer phenomenon of the base oil is obvious after a long time operation. When the rotation speed is 200—800 r/min

the base oil content in the internal position is higher

and the base oil content near the edge position is low and there is a lean state. When the rotation speed is 1000 r/min

the base oil undergoes a process of high to low and then high

and excessive migration of the base oil causes a lean condition. In the internal and intermediate positions

when the rotation speed is 800 r/min

the oil-poor state will be more obvious. At the edge position

the rotation speed is 100

400 and 600 r/min will be more obvious. As a result of basic research

these results will lay the foundation for further research on rolling bearing grease lubrication.

关键词

Keywords

references

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