Efficiency characteristics of piezostack pump
for linear actuators

doi:10.1007/s11465-009-0049-2

Front. Mech. Eng.

2009, Vol. 4

Issue (4) : 407-414 https://doi.org/10.1007/s11465-009-0049-2

Research articles

Efficiency characteristics of piezostack pump for linear actuators

Junwu KAN¹,Kehong TANG¹,Chenghui SHAO¹,Guoren ZHU¹,Taijiang PENG²,

1.College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China; 2.College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China;

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Abstract A piezostack pump for linear actuators is presented and studied in terms of mechanical energy efficiency (MEE), energy conversion efficiency (ECE) and design method. MEE is defined as the ratio of the output mechanical energy to that converted from input electrical energy, and ECE is the ratio of output mechanical energy to input electrical energy. The analysis results show that both MEE and ECE decrease with the increase of stiffness of the chamber diaphragm (k_s), which is a function of the radius ratio (rigid disk radius to chamber radius). There is respective optimal external load (F_c) for them to achieve peak value for a given piezostack with blocked force (F_b) and stiffness (k_a). The optimal force ratio (F_c/F_b) is a constant of 0.5 for maximum MEE, and between 0.57 and 0.5 for maximum ECE. Considering the deflection of the pump chamber and dynamic response of the piezostack, the stiffness ratio (k_s/k_a) should be limited between 0.3 and 1, and the relative radius ratio is between 0.7 and 0.8. With the increase of the radius ratio in the range, the maximal MEE decreases from 0.38 to 0.25, and the peak ECE decreases from 0.20 to 0.14.

Keywords piezostack actuator piezostack pump mechanical efficiency energy conversion efficiency (ECE)

Issue Date: 05 December 2009

Cite this article:

Junwu KAN,Chenghui SHAO,Taijiang PENG, et al. Efficiency characteristics of piezostack pump for linear actuators[J]. Front. Mech. Eng., 2009, 4(4): 407-414.

URL:

https://academic.hep.com.cn/fme/EN/10.1007/s11465-009-0049-2
https://academic.hep.com.cn/fme/EN/Y2009/V4/I4/407

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