CAJ | 학술논문

为了回收由路面不平引起的车辆振动能量，设计了一种车用液电式馈能减振器，并针对其外特性进行了研究。根据液电式馈能减振器组成与原理，建立了相应的数学模型，模拟试验工况计算得到了示功特性及速度特性曲线；搭建了液电式馈能减振器试验台架并进行台架试验以验证理论模型的合理性；最后，基于所建立的液电馈能式减振器数学模型分析了蓄能器充气压力、蓄能器充气体积、液压马达排量、单向阀节流口面积与液压管路内径对外特性的影响。结果表明：提高高压蓄能器充气压力可以增大系统阻尼力；增大高压蓄能器充气体积、单向阀节流口面积、液压管路内径以及液压马达排量会引起系统阻尼力减小，其中液压马达排量只对伸张行程阻尼力有影响，压缩行程阻尼力不受其影响。
위료회수유로면불평인기적차량진동능량，설계료일충차용액전식궤능감진기，병침대기외특성진행료연구。근거액전식궤능감진기조성여원리，건립료상응적수학모형，모의시험공황계산득도료시공특성급속도특성곡선；탑건료액전식궤능감진기시험태가병진행태가시험이험증이론모형적합이성；최후，기우소건립적액전궤능식감진기수학모형분석료축능기충기압력、축능기충기체적、액압마체배량、단향벌절류구면적여액압관로내경대외특성적영향。결과표명：제고고압축능기충기압력가이증대계통조니력；증대고압축능기충기체적、단향벌절류구면적、액압관로내경이급액압마체배량회인기계통조니력감소，기중액압마체배량지대신장행정조니력유영향，압축행정조니력불수기영향。
With the rising concerns of global environmental issues, energy saving in automobiles becomes an important subject. In order to achieve the purpose of vibration reduction, the traditional passive shock absorber converts the vehicle vibration energy to thermal energy, and then the thermal energy is released into the air. However, the energy-regenerative shock absorber could harvest this part of the energy. This paper presents a vehicular hydraulic electromagnetic energy-regenerative shock absorber (HESA) which is designed for acquiring the vibration energy caused by road irregularity. It is composed of a hydraulic cylinder, two check valves, two accumulators, a hydraulic motor, a generator, and hydraulic lines. When the vehicle is subjected to vertical vibration, the oil in the HESA flows to the hydraulic motor through a hydraulic line, then the rotating hydraulic motor drives a generator to produce electricity. In order to consider the vibration reduction performance of the HESA, the damping characteristic was analyzed in detail. Through theoretical analysis, the damping force mathematical model of the HESA was deduced, and the calculation program was written in MATLAB, based on the HESA damping force mathematical model. The indicator diagram characteristic and speed characteristic of the HESA under the working condition of a sinusoidal displacement input of 1.67Hz was obtained from simulation tests, which was designed according to a national absorber test procedure. A test bench was constructed to verify the results of a simulation. The comparison between the bench test data and simulation data showed that the value of a compression travel damping force was smaller than the rebound travel’s, and the peak value of the simulation data was identical with the value in test data. The simulation speed characteristic curve of the HESA was compared with the bench test data. However, there were some distortions in the test indicator diagram characteristic curve because of the inappropriate accumulator parameters. The influences on the HESA caused by the accumulator parameters, such as changes of accumulator pressure, accumulator volume, hydraulic motor displacement, check valve orifice area, and hydraulic pipeline inner diameter were investigated. The results of simulation analysis shows that the damping force was increased with the rising of the accumulator pressure, and decreased with the rising of accumulator volume, check valve orifice area, and hydraulic pipeline inner diameter. Besides, the rebound travel damping force was only influenced by hydraulic motor displacement, that is, the damping force was decreased with the rising of hydraulic motor displacement. The key point is that the value of a compression travel damping force was smaller than the rebound travel’s, which was consistent with the traditional absorber. So we can conclude that the HESA has the damping characteristic matching with the traditional vehicle suspension system, and therefore it has some certain potential applications.