Research on Pressure Stabilization for Loading Cylinders under Centrifu-gation Supergravity Environment Based on Experimental Tests

doi:10.3969/j.issn.1004-132X.2025.08.001

Abstract

Abstract:

To solve the problems of excessive pressure fluctuations in the simulation environment of high gravity centrifugal environment without an external oil source， the factors causing pressure fluctuations were analyzed， and experimental tests were conducted on each factor. Based on the analysis of each factor， an accumulator stabilization scheme was proposed， and the effects of accumulator working parameters， working pressure， and working medium parameters on stabilization performance were compared under different deformation conditions of specimens through supergravity experiments. The experimental test results show that within the temperature range of 36~42.5 ℃， the pressure fluctuation of oil caused by temperature changes is less than 4%. The deformation of the specimen is the main factor affecting pressure fluctuations， with a pressure fluctuation ratio of up to 47% caused by a deformation of 1 mm in the samples. The fluctuation ratio of the accumulator during pressure stabilization under supergravity is proportional to the working pressure and the deformation of the specimen. The use of two 300 mL gas volume accumulators may achieve the requirement of less than 10% internal pressure fluctuation of 20 MPa， which is consistent with theoretical calculations. The test provides technical support for controlling pressure fluctuations in high-temperature and high-pressure devices under supergravity environments.

Key words: high gravity centrifugal environment, temperature, working pressure, pressure fluctuations, accumulator, working medium

摘要：

为解决超重力离心模拟环境下装置在无外接油源时压力波动过大的问题，对引起压力波动的因素进行了分析，并针对各因素进行了试验测试，在对各因素进行分析的基础上提出蓄能器稳压方案，并通过超重力实验对比了不同试件变形工况下蓄能器工作参数、工作压力及工作介质等参数对稳压性能的影响。试验测试结果表明：油液测试温度36~42.5 ℃范围内，温度变化引起的压力波动比小于4%；试件变形量是影响压力波动的主要因素，样品1 mm的变形量引起的压力波动比可达47%；超重力下蓄能器稳压时的波动比与工作压力及试件变形量成正比，采用2个300 mL气体体积的蓄能器可实现20 MPa内压力波动小于10%的需求，且与理论计算结果较为吻合。研究结果为超重力环境下高温高压及其他装置的压力波动控制提供了技术支撑。

关键词: 超重力离心模拟环境, 温度, 工作压力, 压力波动, 蓄能器, 工作介质

CLC Number:

TH137

Bingjing QIU, Muhua JIA, Yinqi LI, Liubin JI. Research on Pressure Stabilization for Loading Cylinders under Centrifu-gation Supergravity Environment Based on Experimental Tests[J]. China Mechanical Engineering, 2025, 36(8): 1651-1657.

邱冰静, 贾慕华, 励音骐, 吉刘斌. 基于试验测试的超重力离心模拟环境下加载缸稳压方案研究[J]. 中国机械工程, 2025, 36(8): 1651-1657.

Figures/Tables 15

Fig.1 Example of pressure fluctuation results in entrifugation experiments

Fig.2 Schematic diagram of compressor and high temperature and high pressure chamber

Fig.3 The force on components

Fig.4 The variations of temperature and pressure based on experimental test

Tab.1 Pressure fluctuations within temperature 36~42.5 ℃

p_a0（36 ℃）/

MPa

p_a0（42.5 ℃）/

MPa

单位温升的压力

变化/（MPa·K^-1）

压力波动/

Fig. 5 The measure of sample deformation

Fig.6 Measurement of sample deformation

Fig.7 The stabilization performance of energy storage device based on supergravity centrifugal testing

Fig.8 Single accumulator with water （pa0=10 MPa）

Fig.9 Single accumulator with water （pa0=20 MPa）

Tab.2 Pressure variation of single accumulator under high gravity （water medium）

体积压缩量/mL	p_a0/MPa	p_at/MPa	λ/%	V_ac/mL
10	9.96	10.41	4.52	9.14
10	19.82	21.62	9.08	8.82
20	10.41	11.38	9.32	17.20
20	21.63	26.11	20.71	16.66

Fig.10 Double accumulators with water （pa0=10 MPa，20 MPa）

Tab.3 Pressure variation of double accumulator under high gravity （water medium）

体积压缩量/mL	p_a0/MPa	p_at/MPa	λ/%	V_ac/mL
10	10.20	10.44	2.35	9.464
10	20.30	21.19	4.38	8.674
20	10.44	10.92	4.60	17.68
20	21.17	23.19	9.54	17.28

Fig. 11 Double accumulators with oil （pa0=20 MPa）

Tab.4 Pressure variation of double accumulator under high gravity （oil）

体积压缩量/mL	p_a0/MPa	p_at/MPa	λ/%	V_ac/mL
10	20.10	21.07	4.83	9.62
20	21.12	23.13	9.56	17.28

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