Theoretical and experimental research on the cartridge two-dimensional (2D) electro-hydraulic servo valve

Zheng, Fang; Sheng, Li; Ding, Chuan; Zhao, Jiantao; Ruan, Jian

doi:10.1177/1687814021996532

Cited by 10 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is one main reason for the error between the simulation results and experimental results. The value of the damping coefficient of the armature component in the simulation model calculation refers to the value in [3], which may be smaller. By comparing Figures 17 and 18, it can be seen that the system was reduced to −3 dB frequency, while the phase lag was slower, which is mainly related to the small design of the mechanical spring stiffness coefficient of the torque motor.…”

Section: Experiments and Discussionmentioning

confidence: 99%

“…Considering the actual working conditions of the torque motor, T L = 0, but the value of B a is relatively complex, as it mainly depends on the load, that is, mechanical damping, viscous damping, transient hydraulic force, and the friction of the sealing ring of the 2D servo valve [18]. Due to the word count limitations, this section was not detailed, and the value of Ba was obtained from [3].…”

Section: Establishment Of the Torque Motor Mathematical Model Conside...mentioning

confidence: 99%

“…At present, there are only a few analyses of the eddy current effect on torque motors [1]. The two dimensional (2D) valve designed by the author's research team is particularly utilized in the aviation field due to its high power-to-weight ratio and strong anti-pollution performance [2][3][4][5]. As electromechanical converters, torque motors significantly limit the working bandwidth of valves, which is generally below 50 Hz, so improving their bandwidth is an urgent problem.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Eddy current loss modelling for torque‐motors

Cao

Liang

et al. 2021

IET Power Electronics

Self Cite

View full text Add to dashboard Cite

A torque motor is a key component that directly influences the dynamic performance of two-dimensional (2D) cartridge servo valves. Considering the effects of eddy current, a magnetic circuit model of a torque motor is proposed, and the eddy current resistance value considering the skin effect is calculated. When the eddy current effect is ignored, the natural frequency and critical damping of a torque motor are less than the calculated values under the eddy current effect, so the eddy current influence can be assumed to increase torque motor damping, as the iron loss can be equivalent to the damping energy consumption. Test rigs were set up and experiments were conducted based on a torque motor prototype. Through a finite element simulation analysis, the eddy current effect of the armature was found to be greater than that of the yokes. The magnetic leakage coefficients of the permanent magnets were calculated, and the obtained values were compared through experiments and simulations. Both the numerical simulations and experimental results showed that the eddy current model is closer to actual working conditions than the model for which the eddy current loss was ignored.

show abstract

Section: Experiments and Discussionmentioning

confidence: 99%

Section: Establishment Of the Torque Motor Mathematical Model Conside...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Eddy current loss modelling for torque‐motors

Cao

Liang

et al. 2021

IET Power Electronics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hydraulic pumps are developing towards high speed, miniaturization and energy saving [11,12]. Therefore, Ruan's team proposed a novel piston pump with a design based on the "two-dimensional" concept [13][14][15], which has a single piston [16][17][18] and double rotor type [19][20][21]. The 2D piston pump with a balanced force uses the rolling friction of the roller-guide-rail mechanism instead of the sliding friction of the swash plate-slippers mechanism.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Mechanical Efficiency Models for 2D Piston Pumps with a Stacked Taper Roller Set

et al. 2022

Self Cite

View full text Add to dashboard Cite

Since the clearance between the guide rail and the roller reduces the efficiency of the 2D pump, this paper proposes a novel 2D piston pump with stacked taper roller sets to eliminate the effect of the clearance. The structure of the 2D pump is introduced, and the mathematical model of the torque and the mechanical efficiency of the bilateral force on the guide rail are established and analyzed. The model takes into account the change in the oil viscosity, the spatial angle and the oil churning loss. A test rig was built to test the mechanical efficiency under different operating conditions. The unilateral and bilateral force models of the guide rail were compared, which proved that the bilateral force model of the guide rail can predict the mechanical efficiency more accurately than the unilateral force model. In the case of high load pressure, there was a clearance between the test results and the model calculation results. It is speculated that the main reason for this is that the greater oil pressure causes the size of the contact area between the two taper rollers and between the taper roller and the guide rail to become larger. The resulting rolling friction coefficient becomes larger, which affects the mechanical efficiency.

show abstract

“…The presented work emanated from the research achievements obtained by authors' research group which is focused on two-dimensional (2D) hydraulic components. [26][27][28][29] The ''2D'' concept implies allowing the critical parts of the designed hydraulic components to have two working degree of freedom. 30 Authors' previous researches show a novel flowmeter using parallel 2D pistons as the metering units for the purpose of measuring the steady flow rate.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the dynamic characteristics of a two-dimensional piston flowmeter

Ding

Chen

Zhang

et al. 2022

Advances in Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

The immediate measurement of dynamic flow rate is of importance in the modern hydraulic system. Following a brief review and analysis on measuring methods of dynamic flow rate, authors introduced the structure and working principle of a two-dimensional piston dynamic flowmeter. Consequently, a mathematical model was carefully established based on its unique mechanical properties due to the two degrees of working freedom. Meanwhile, the transform function is obtained to describe the dynamic characteristics and used to discuss influences from various design parameters. Finally, a 3D printed prototype was designed and fabricated to measure the sinusoidal flow rate with the frequency range of 1–7 Hz on a calibration test rig. The discrepancy between the experimental and the simulated date is quite foreseeable considering the major influence of low oil bulk modulus due to air bubbles. Although the magnitude reaches −3 dB at 4 Hz, the dynamic characteristics are acceptable and can verify the feasibility of applying the two-dimensional piston flowmeter on the dynamic measurement field. The shortcomings of this prototype are well discussed in the conclusion part to provide guidance to enhance the design ability of next-generation prototypes.

show abstract

Theoretical and experimental research on the cartridge two-dimensional (2D) electro-hydraulic servo valve

Cited by 10 publications

References 17 publications

Eddy current loss modelling for torque‐motors

Eddy current loss modelling for torque‐motors

Optimization of Mechanical Efficiency Models for 2D Piston Pumps with a Stacked Taper Roller Set

An investigation on the dynamic characteristics of a two-dimensional piston flowmeter

Contact Info

Product

Resources

About