Experimental Study of Friction Characteristics of Pneumatic Cylinders

Wakasawa, Yasunori

doi:10.5739/jfpsij.11.110

Cited by 3 publications

(6 citation statements)

References 8 publications

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“…With the development of science and technology, pneumatic technology is showing a new situation of vigorous development, and its measurement technology is also advancing with the times. The main tests related to pneumatics are valve port flow test [1,2], vessel volume test [3], chamber pressure test [4], pneumatic cylinder friction test [5][6][7][8][9][10][11][12][13][14][15][16], etc. As one of the most commonly used actuators in pneumatic systems, pneumatic cylinders are widely used in industry [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…The direct test method is to drive the pneumatic cylinder to be tested by external force (such as electric cylinder, hydraulic cylinder and pneumatic cylinder), which is characterized by a force transducer. According to the installation method, the force transducer can be divided into two types: mobile type [5][6][7][8][9] and fixed type [10][11][12][13][14][15][16]. In force measurement, the mobile installation is sensitive to dynamic loads and inertial effects.…”

Section: Introductionmentioning

confidence: 99%

“…In the remaining cases of the direct test method, the pneumatic cylinders under test are mostly driven by electric actuators [6][7][8][9][10][11][12][13][14], because it can provide a wider low-speed measurement range than by a hydraulic cylinder or a pneumatic cylinder. Therefore, some representative cases are listed below.…”

Section: Introductionmentioning

confidence: 99%

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Development of a new high-precision friction test platform and experimental study of friction characteristics for pneumatic cylinders

Qian

Liu

et al. 2022

Meas. Sci. Technol.

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In order to achieve high-precision pneumatic cylinder friction test, this paper proposes a new direct measurement method based on electric cylinder in which the axially acting forces from the compressed air in the two facing pneumatic cylinders cancel each other out and the detected value of the force transducer is just friction. For the sake of the implementation of the method, a new low-cost test method for identifying deadband of proportional directional valve was proposed, and a set of fuzzy PI constant pressure control system was designed to cope with a certain degree of leakage in the chamber. Based on the above, a friction test platform with two pneumatic cylinders facing each other was eventually built to study the influence of pressure, pressure difference, and piston speed on the friction of two commonly used different types of pneumatic cylinders. Through multiple sets of tests, it is found that when the lip seals are used in pairs between the piston and the inner wall of the cylinder, the friction between the piston and the cylinder is only related to the sum of the two chamber pressures, but not to the pressure difference between the two chambers; When the O-ring seal is used between the piston and the inner wall of the cylinder, the friction between the piston and the cylinder is related not only to the pressure of the two chambers, but also to the pressure difference between the two chambers. In addition, a series of comparative tests with the traditional single-cylinder friction test method directly demonstrate the effectiveness of the proposed new method.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of a new high-precision friction test platform and experimental study of friction characteristics for pneumatic cylinders

Qian

Liu

et al. 2022

Meas. Sci. Technol.

View full text Add to dashboard Cite

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“…A compensation friction model of the cylinder has also been developed. The steady-state friction characteristics of cylinders with good low-speed performance can be represented by ordinary friction models and the friction characteristics are mainly determined by the piston seals [ 8 ]. In order to study the effect factors in friction process, rather than the relative movement of the contact surface, the friction behavior of the hybrid pump control hydraulic system was studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of Geometric Error on Friction Behavior of Cylinder Seals

Lin

Li³

et al. 2021

Polymers

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The tribological characteristics of the cylinder directly affect the operation accuracy of the pneumatic servo system. However, the geometric error has a significant effect on its tribological behavior and the related research is insufficient. Thus, the dynamic friction process of rubber seals has been investigated considering the influence of geometric errors. Firstly, based on the self-made friction test platform, the friction force of the rubber seals was studied and the influence law of geometric error on the contact area of the rubber seal ring was revealed. Secondly, the numerical model of the friction and contact of the rubber seals for the cylinder segment was developed by using the finite element simulation method and the influence laws of machining errors, such as roundness and straightness on the friction characteristics, were revealed. Finally, synergy effects of roundness and straightness in the friction behavior of rubber seals considering geometric errors was investigated, which lays a foundation for the accurate prediction of cylinder dynamic mechanical properties.

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“…Wakasawa et al presented a study on effects of rod and piston packing on frictional behavior in stable and dynamic working conditions. The results showed that the piston packing strongly influenced the behavior of friction in the pneumatic cylinder [7]. In addition, the vibration and friction behavior of pneumatic cylinders are experimentally studied, and the stick-slip motion phenomenon occurs at a speed of 0.010 m/s [8].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Friction in Pneumatic Cylinders with Different Relative Humidity

Pham¹,

Nguyen²,

Bui³

2020

Tribol. Ind.

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Friction directly affects the motion quality and performance of a pneumatic cylinder system. The frictional behavior of pneumatic cylinder depends on pressure, velocity, diameter, lubrication, and working environment, etc. The relative humidity of the atmospheric environment always affects the friction of dynamic parts. The presence of different humid films on the surface of dynamic parts will cause a change in the frictional behavior of the pneumatic cylinder, which is expressed as the difference between static and dynamic friction. This paper presents the results of research on frictional behavior of a pneumatic cylinder when the atmospheric humidity changes. The studies were conducted at relative humidity of 51 %, 75 % and 99 %, with velocities of 5, 10, 30, 50 and 100 mm/s, respectively. The results show that the effect of atmospheric humidity on the static friction force (FS), the dynamic friction force (FD) and the difference between them is clear. The static friction and dynamic friction forces decrease when the humidity increases at the studied velocities. The change in dynamic friction force is 1.5 times greater than static friction. The difference between static and dynamic friction is large at low speeds and low relative humidity, and vice versa. Moreover, it also shows that the stick-slip phenomenon is improved as the relative humidity increases.

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Experimental Study of Friction Characteristics of Pneumatic Cylinders

Cited by 3 publications

References 8 publications

Development of a new high-precision friction test platform and experimental study of friction characteristics for pneumatic cylinders

Development of a new high-precision friction test platform and experimental study of friction characteristics for pneumatic cylinders

Effect of Geometric Error on Friction Behavior of Cylinder Seals

Behavior of Friction in Pneumatic Cylinders with Different Relative Humidity

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