液力缓速器虹膜空损抑制方法研究

doi:10.3901/JME.2020.20.237

机械工程学报 ›› 2020, Vol. 56 ›› Issue (20): 237-245.doi: 10.3901/JME.2020.20.237

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液力缓速器虹膜空损抑制方法研究

魏巍^1,2, 刘堂柱¹, 闫清东^1,2, 安媛媛¹

1. 北京理工大学车辆传动国家重点实验室北京 100081;
2. 北京理工大学重庆创新中心重庆 401120

收稿日期:2019-09-10 修回日期:2020-03-31 出版日期:2020-10-20 发布日期:2020-12-18
作者简介:魏巍(通信作者),男,1978年出生,博士,副教授,硕士研究生导师。主要研究方向为流体传动与控制、多域机动平台。E-mail:weiweibit@bit.edu.cn
基金资助:
国家自然科学基金(51475041,51805027)、国家部委基础产品创新计划(237099000000170009)和车辆传动国家级重点实验室基金(614221304040517)资助项目。

Study on an Iris Idling Power Loss Suppression Method in Hydrodynamic Retarder

WEI Wei^1,2, LIU Tangzhu¹, YAN Qingdong^1,2, AN Yuanyuan¹

1. National Key Lab of Vehicular Transmission, Beijing Institute of Technology, Beijing 100081;
2. Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401120

Received:2019-09-10 Revised:2020-03-31 Online:2020-10-20 Published:2020-12-18

摘要/Abstract

摘要： 为有效抑制液力缓速器空转功率损失,参考虹膜光圈机构的特点,提出一种新型的虹膜式空损抑制方法,通过虹膜机构阻隔循环圆气流过流通径来抑制空损功率。建立虹膜式空损抑制机构完全起效及未起效两种工况下的液力缓速器全流道计算模型,通过不同转速全气相流动的数值模拟对比研究,获取液力缓速器空损转矩、空损功率特性与内流场速度场、压力场分布。仿真结果表明,虹膜机构完全起效时能够有效隔断动轮和定轮间的气体循环流动以降低功率损失,当动轮转速为4 000 r/min时,虹膜机构完全起效空损功率为0.8 kW,与无空损抑制机构时的空损功率61.6 kW相比,降低至1.3%;与现有的扰流柱空损抑制机构完全起效时的空损功率15.8 kW相比,降低至5.1%。设计缓速器台架试验,验证虹膜机构完全起效时能够显著抑制空转损失,从而大幅提升车辆行驶的功率利用率。

关键词: 液力缓速器, 空转损失, 过流通径, 虹膜机构, 数值模拟

Abstract: For effectively suppressing idling power loss of hydrodynamic retarder, an innovative iris mechanism scheme is designed based on structural characteristics of iris aperture with its principle of idling loss suppression that blocked the circulation flow path. The full flow path models of hydrodynamic retarder with and without the iris mechanism working are established and through the numerical simulation at different rotational speeds, the torque and power loss characteristics are obtained, as well as internal flow field flow and pressure distributions. Simulation results show that the iris mechanism can effectively block the circulating flow between rotor and stator to reduce energy loss. When the speed of the rotor is set as 4 000 r/min, and the iris mechanism is fully effective, the idling power loss value is 0.8 kW, which is reduced to 1.3% compared to the value of 61.6 kW when the iris mechanism does not work and reduced to 5.8% compared to the value of 15.8 kW when the existing spoiler is fully effective. The retarder bench test verifies that the iris mechanism can significantly suppress the idling loss and can greatly improve the power utilization of the vehicle.

Key words: hydrodynamic retarder, idling power loss, circulation flow path, iris mechanism, numerical simulation

中图分类号:

TH137

魏巍, 刘堂柱, 闫清东, 安媛媛. 液力缓速器虹膜空损抑制方法研究[J]. 机械工程学报, 2020, 56(20): 237-245.

WEI Wei, LIU Tangzhu, YAN Qingdong, AN Yuanyuan. Study on an Iris Idling Power Loss Suppression Method in Hydrodynamic Retarder[J]. Journal of Mechanical Engineering, 2020, 56(20): 237-245.

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液力缓速器虹膜空损抑制方法研究

Study on an Iris Idling Power Loss Suppression Method in Hydrodynamic Retarder

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