李少年, 陈龙, 张磊, 赵茹, 胡振铭. 高压子母叶片泵配流副油膜的温升特性[J]. 农业工程学报, 2019, 35(20): 52-59. DOI: 10.11975/j.issn.1002-6819.2019.20.007
    引用本文: 李少年, 陈龙, 张磊, 赵茹, 胡振铭. 高压子母叶片泵配流副油膜的温升特性[J]. 农业工程学报, 2019, 35(20): 52-59. DOI: 10.11975/j.issn.1002-6819.2019.20.007
    Li Shaonian, Chen Long, Zhang Lei, Zhao Ru, Hu Zhenming. Temperature rise characteristics of oil film in flow distribution pair of high-pressure intra-vane type pump[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2019, 35(20): 52-59. DOI: 10.11975/j.issn.1002-6819.2019.20.007
    Citation: Li Shaonian, Chen Long, Zhang Lei, Zhao Ru, Hu Zhenming. Temperature rise characteristics of oil film in flow distribution pair of high-pressure intra-vane type pump[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2019, 35(20): 52-59. DOI: 10.11975/j.issn.1002-6819.2019.20.007

    高压子母叶片泵配流副油膜的温升特性

    Temperature rise characteristics of oil film in flow distribution pair of high-pressure intra-vane type pump

    • 摘要: 为了改善高压叶片泵的性能,提升配流副的摩擦特性,采用理论分析、数值模拟和试验测试的方法,研究配流副油膜不同部位的温升情况。首先分析了吸油区和排油区的内、外层区域油膜油液运动情况,建立油膜温升的计算模型。然后从理论计算结果、温度场数值模拟云图和试验测试结果进行分析讨论。结果发现,高压子母叶片泵配流副油膜的温升受到工作压力和油膜厚度的影响,油膜厚度一定时,油膜温升值随压力的增大而增大,而工作压力一定时,油膜温升值随油膜厚度增大而减小。配流副吸油区油膜的内外层区域的温升值不一样,外层区域油膜温升值比内层区域高0.5~1 ℃。相同的工作压力下,由于受到剪切流动和较大压差流动的共同作用,吸油区油膜温升值比排油区油膜温升值高1.5~3.5 ℃。排油区外层区域的油膜温升值比内层区域的高,内外层区域油膜温升值沿圆周方向均从两侧向中心方向增大,中心位置温升值最大,差值约为0.25~0.5 ℃。

       

      Abstract: With the development of vane pump toward high pressure direction, the requirement for the friction condition of its flow distribution pair is more stringent. The temperature rise of oil film in flow distribution pair which is composed by distribution plate and rotor will cause thermal deformation of flow distribution pair and affect the fitting clearance. Especially when the valid oil film cannot be formed by the flow distribution pair, the local temperature rise is more obvious, which will lead to the solid surface contact friction in the local area of the friction surface, and affect the normal operation of the vane pump. In order to improve the performance of high-pressure vane pump and the friction characteristics of the flow distribution pair, in this paper, the temperature rise of different parts of the oil film in the flow distribution pair was studied by means of theoretical analysis, numerical simulation and experimental test. For the convenience of analysis, the oil film was divided into six parts, which were shared out equally in the oil suction area and the oil discharge area. According to the flow state of the oil film in the flow distribution pair, the mathematical models of oil film temperature rise in the oil suction area and the oil discharge area were established respectively. The curves of temperature rise with working pressure in oil suction area and with sliding velocity in oil discharge area were obtained by calculation. The geometric model of the oil film was set up and meshed. Through the numerical calculation, the temperature distribution nephograms were obtained when pump working in the pressure of 3, 7 and 11 MPa. Finally, eight temperature sensors were installed at different radial and circumferential positions to measure the temperature of the oil film at eight acquisition points when the pump worked on three different pressures above. The actual temperature rise curve of the oil film of the flow distribution pair was obtained by subtracting the oil temperature rise data from the original data. The results showed that theoretical calculation, numerical simulation and experimental test results were close with small relative error. The temperature rise was affected by the working pressure and the thickness of the oil film, and it increased with the increase of pressure when the thickness of oil film was constant, while decreased with the increase of the thickness of oil film when the working pressure was constant. The temperature rise of oil film in the inner and outer layer of the oil suction area was different. And the temperature rise of oil film in the outer layers was 0.5 ℃ to 1 ℃, higher than that in the inner layer. The temperature rise of oil film in oil suction area was affected by both shear flow and differential pressure flow, while the temperature rise of oil film in oil discharge area was mainly affected by shear flow. Under the same working pressure, the temperature rise of oil film in oil suction area was 1.5 - 3.5 ℃, higher than that in oil discharge area. The temperature rise of the oil film in the outer layer of the oil discharge area was higher than that in the inner layer. The temperature rise of inner layer and outer layer oil film increases along the circumference from both sides to the center, and the largest temperature rise in the center position, with the difference being about 0.25 - 0.5 ℃. The research provides a reference for the oil film design of the flow distribution pair in high-pressure vane pump.

       

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