Page 94 - 《真空与低温》2026年第2期

第 32 卷 第 2 期 真空与低温
2026 年 3 月 Vacuum and Cryogenics 213

基 于 一 体 式 柔 性 弹 簧 的 制 冷 机 隔 振 器 性 能 研 究

王景杰，许国太 ，薛海亮，庄昌佩，杨宝山，何嘉华，于锟锟，杜海鹏
*
（兰州空间技术物理研究所，兰州 730000）

摘要：机械制冷机是提供空间红外载荷低温工作环境的关键设备，其运行过程中产生的振动是影响红外探测
器正常工作的重要因素。为抑制制冷机振动传递，基于一体式柔性弹簧结构设计了一种被动隔振装置。以振动
传递率为目标确定了系统的隔振参数，采用结构参数化有限元方法确定了隔振元件柔性弹簧的结构尺寸。实验
结果表明，该装置在压缩机主频处 x、y、z 三方向均实现显著的振动抑制，压缩机轴向隔振效率达 90%。
关键词：制冷机；被动隔振；柔性弹簧；隔振设计
中图分类号：TB651 文献标志码：A 文章编号：1006-7086（2026）02-0213-07
DOI：10.12446/j.issn.1006-7086.2026.02.013

Performance Study of Cryocooler Vibration Isolators Based on Monolithic Flexure Springs

WANG Jingjie，XU Guotai ，XUE Hailiang，ZHUANG Changpei，YANG Baoshan，
*
HE Jiahua，YU Kunkun，DU Haipeng
（Lanzhou Institute of Physics，Lanzhou 730000，China）

Abstract：The mechanical cryocooler is a critical component for providing the low-temperature environment essential
for space-based infrared payloads. The vibrations generated during its operation， primarily from compressor reciprocation，
constitute a significant disturbance that can degrade infrared detector performance through image jitter and reduced pointing
accuracy. To suppress vibration transmission，this paper presents a passive vibration isolation device based on a monolithic
flexure spring structure. The design eliminates moving contact points，thereby avoiding friction，wear，and particulate gen-
eration—key advantages for long-duration space missions. Guided by classical vibration isolation theory，the system pa-
rameters were optimized to minimize vibration transmissibility，with the natural frequency set significantly below the com-
pressor's fundamental excitation frequency. A parametric finite element method was employed to determine the flexure
spring's structural dimensions. Critical geometric parameters，including beam thickness，length，and curvature，were defined
as variables and iteratively optimized through finite element analysis. This process balanced the requirement for low
stiffness—necessary for effective high-frequency isolation—against the need for sufficient mechanical strength to
withstand launch and operational loads. Experimental validation was conducted using a test setup equipped with tri-axial ac-
celerometers. Vibration levels were measured at the cryocooler mounting point and the isolated base across a frequency spec-
trum encompassing the compressor's fundamental frequency and its harmonics. The results demonstrate significant simultane-
ous vibration attenuation along all three translational axes （x，y and z）. Specifically，the device achieved an axial （z-direction）
vibration isolation efficiency of 90% at the compressor’s fundamental frequency，corresponding to a transmissibility of 0.1.
Substantial suppression was also observed in the lateral directions. These findings validate the design methodology and con-
firm the device's efficacy in providing a stable mechanical environment，thereby enhancing the performance and reliability of
sensitive space-based infrared detection systems.
Key words：cryocooler；passive vibration isolation；flexure spring；vibration isolation design

0 引言 部件，其运动部件产生的振动输出会影响探测器的

随着空间遥感探测任务探测精度的不断提高， 工作性能，为保证在轨探测器的探测精度及成像质
有效载荷对环境振动条件也提出了更高要求。空间 量，需要对空间机械制冷机振动进行有效控制 [1-2] 。
机械制冷机作为保证红外探测器正常工作的关键 隔振技术是目前普遍采用的振动控制方案，主要可以

收稿日期：2026−01−15
作者简介：王景杰，硕士研究生。E-mail：1582839041@qq.com
通信作者：许国太，研究员。E-mail：xugt_lip@163.com