Study on dynamic characteristics and compensation of wire rope tension based on oil pressure sensor

Lei, Gaoyang; Gao, Xu; Xiao-guang, Zhang; Tian, Baolai

doi:10.1177/1687814019836024

Cited by 5 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results in the article [27] show that the authors G. Lei et al proposed compensation improves the accuracy of the real-time measurement system of wire rope tension. Articles [28] and [29] states that the oil pressure sensors are installed on the hydraulic connection device to monitor the tension of wire ropes.…”

Section: Introductionmentioning

confidence: 93%

A Laboratory Machine Verifying the Operation of a Hydraulic Rope Equalizer with Tensometric Sensors

Hrabovský,

Fries,

Pravda

2024

Preprint

View full text Add to dashboard Cite

In mining machines with friction discs, but also in multi-rope traction elevators, it is necessary to distribute the applied tensile load, generated by the weight of the cage and counterweight, evenly in all cross-sections of the load-bearing ropes. Hydraulic devices used for this purpose can operate on the principle of Pascal's law. The article presents a structural design, a 3D model and an implemented solution of a laboratory device capable of simulating a practical method of evenly distributing the total weight of the load into partial tensile forces of the same size acting on a selected number of load-bearing ropes. The laboratory equipment uses two pairs of three steel cables of finite length for the simulations. During the experimental measurements, tensile forces derived from the tractive force of the piston rods, pushed into the bodies of the hydraulic cylinders by the pressure of the hydraulic oil supplied through the pipeline under the pistons of the hydraulic cylinders, were detected. The resulting amount of hydraulic oil pressure in the hydraulic circuit influenced by different values of the hydraulic oil pressures in the hydraulic cylinders and by the pressure in the supply pipe was experimentally studied on the laboratory equipment. Simulations were also carried out in order to detect the hydraulic oil pressure in the hydraulic circuit caused by the change in the different magnitudes of the tensile forces in the ropes From the experiments carried out, it follows that with the appropriate choice of hydraulic elements and the design of the hydraulic circuit, the weight of the load, acting as the total pulling force in the ropes, can be evenly distributed (with a deviation of up to 5%) to all cross-sections of the load-bearing ropes. If the exact values of the hydraulic oil volumes under the pistons of all hydraulic cylinders are not known, it is not possible to calculate the pressure values in the hydraulic circuit when the valves of the hydraulic pipes are gradually opened.

show abstract

Section: Introductionmentioning

confidence: 93%

A Laboratory Machine Verifying the Operation of a Hydraulic Rope Equalizer with Tensometric Sensors

Hrabovský,

Fries,

Pravda

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Проаналізувавши основні експлуатаційні вимоги до будови компенсаторів, наявні обмеження щодо їх вартості, маси, габаритів, складності монтажу й використання, умов навколишнього середовища, а також врахувавши потребу у плавності ходу робочих органів і надійності роботи, зроблено висновок про доцільність проєктування та застосування у транспортувальному процесі гідравлічних компенсаторів [17,21,22] з метою оснащення ними окремих типів підвісних доріг. У такому разі, врахувавши технічні вимоги міцності, жорсткості [5], герметичності, можливий вплив вітрового навантаження, зміни атмосферного тиску, температурних коливань [23], хімічний склад використовуваної рідини (гідравлічної оливи), наявні обмеження вагових та геометричних параметрів конструкції, а також галузеві рекомендації щодо технологічних параметрів процесу транспортування лісоматеріалів і кращі інженерні практики, основні конструкційні параметри проєктованих гідравлічних компенсаторів визначатимуться показниками, зазначеними у табл.…”

Section: результати дослідженняunclassified

Displacement compensators for the skylines of timber transportation cableways

Rudko,

Bakay,

Karatnyk

et al. 2023

JMET

View full text Add to dashboard Cite

Cableways for timber transportation are quite effective in terms of manufacturability, specific energy consumption, material capacity and the negative impact level on the environment in difficult natural operating conditions, compared to similar types of machines. Since non-stationary cableways are usually used in forestry production, which are characterized by a light construction with relatively small safety margins of cable equipment elements, then for this type of roads, the reliability and safety of the skylines work are important factors for their effective operation. In order to reduce the cost and duration of installation and dismantling operations, the skylines are usually rigidly fixed to trees, stumps or artificial supports. Such a cable fastening scheme is technically convenient, but it does not allow for constant tension of the skylines when the carriage with the load is moving along the span, under wind load, possible temperature fluctuations, icing of structural elements, and emergency situations. As a result, intensive changes in cable tension during their operation cause dynamic loads and vibrations in the cable rigging, as well as uneven and accelerated wear of the skylines, and a decrease in their durability. Under such conditions, in order to increase the reliability of the cable rigging of timber transportation cableways (both individual existing models of equipment and the latest ones), it is proposed to equip them with displacement compensators for the skylines. After analyzing a number of prototype devices that are effectively used in related industries, it was concluded that pneumatic, mechanical, and hydraulic compensator designs can be considered rational for timber production. Therefore, in view of the above, we performed a detailed calculation and designed the main technical elements of the compensating device, developed a control scheme for its working body, and analyzed its stress-strain state using the Autodesk Inventor software package. The use of rational compensator designs and appropriate control schemes for their working bodies will create the prerequisites for reliable and safe operation of timber transportation cableways in various operating modes and terrain and climatic conditions, and minimize the likelihood of emergencies

show abstract

“…Our research object is a flexible system of fixed length. The dynamic elastic displacement w ( L , t ) and the strain w ′ ( L , t ) at the lower end of the rope can be measured by employing a laser displacement sensor and obtained from the tension measured by a tension sensor 38 at the cage, respectively. The time-dependent loaded mass Q m ( t ) of materials can be obtained through the weight-measuring device.…”

Section: Boundary Control Designmentioning

confidence: 99%

Boundary control of vibration and dynamic tension fluctuation in a lifting system during the loading process

Wang

Cao

2022

Proceedings of the Institution of Mechanical Engineers, Part I:

View full text Add to dashboard Cite

This article focuses on the boundary control for a lifting system during the loading process. A lifting system during the loading process is essentially a non-conservative system. The system dynamics are modelled based on the extended Hamilton’s principle. We consider the unmeasurable impact force caused by the uncertain materials falling velocity as a boundary disturbance and design a disturbance observer to eliminate its effect. The control system needs to guarantee the output constraints that the boundary vibration and dynamic tension fluctuation are both suppressed in a constrained scope of the desired value. Two appropriate boundary backstepping control schemes are proposed by actuators acting on different boundaries to realize the output constraints and to ensure the stability of the closed-loop system in theory. Numerical simulations are provided to illustrate the effectiveness of the proposed control laws in suppressing the cage vibration and rope dynamic tension fluctuation amplitude.

show abstract

Study on dynamic characteristics and compensation of wire rope tension based on oil pressure sensor

Cited by 5 publications

References 9 publications

A Laboratory Machine Verifying the Operation of a Hydraulic Rope Equalizer with Tensometric Sensors

A Laboratory Machine Verifying the Operation of a Hydraulic Rope Equalizer with Tensometric Sensors

Displacement compensators for the skylines of timber transportation cableways

Boundary control of vibration and dynamic tension fluctuation in a lifting system during the loading process

Contact Info

Product

Resources

About