Performance analysis of the new balance jack of anti-impact ground pressure hydraulic support

Wan, Lirong; Yu, Xuehui; Zeng, Xiaoteng; Ma, Dejian; Wang, Jiantao; Meng, Zhaosheng; Zhang, Hongkai

doi:10.1016/j.aej.2022.07.002

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…Cao et al [6] studied the dynamic loading performance of hydraulic support under variable loading conditions and optimized the top beam structure. Wan [23] et al analyzed the performance of the new equilibrium jack under the pressure bumping and concluded that the new equilibrium jack has better impact resistance. Wang [30] et al investigated the stress response and working characteristics of the hydraulic support column.…”

Section: Eksploatacja I Niezawodnosc -Maintenance and Reliabilitymentioning

confidence: 99%

Study on the influence of pin shaft clearance on the bearing performance of the hydraulic support

Du,

Yang

2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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The pin clearance is a significant factor affecting the bearing capacity of the hydraulic support, but the effect of the pin clearance is often neglected in the current studies. Therefore, on the basis of considering the Equal stiffness spring damping system of the column, the dynamic simulation model of the hydraulic support without clearance was constructed to study the static bearing capacity of the hydraulic support. Moreover, as per the contact model of the connecting pin clearance, the dynamic simulation model of the single-pin clearance hydraulic support was established. The effect of single pin clearance on the load of the front and rear columns of the hydraulic support and the transmission force at key bearing points was analyzed. Meanwhile, the influence of single pin clearance at different positions on the bearing capacity of the hydraulic support was compared. Through the design of orthogonal test, the change of the transmission force of the bearing points under the coupling of multi-pin clearance was studied.

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Section: Eksploatacja I Niezawodnosc -Maintenance and Reliabilitymentioning

confidence: 99%

Study on the influence of pin shaft clearance on the bearing performance of the hydraulic support

Du,

Yang

2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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“…Wan et al proposed a new balance jack structure and verified the performance of the pressure relief buffer protection process based on AMESim, optimizing the discharge hole. The results show that this new type of balance jack can realize rapid buffer unloading when the hydraulic support is impacted, and has better impact resistance [32]. Stoi ński et al performed bench tests of hydraulic cylinders with a diameter of 0.32 m to verify the calculations and test methods.…”

Section: Introductionmentioning

confidence: 99%

Study on Working Characteristics of 4-Column Hydraulic Support in Lifting–Lowering–Moving State Based on Microcontact Theory and Rigid–Flexible–Mechanical–Hydraulic Coupling Simulation Model

Xie,

Yang

2024

Actuators

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A hydraulic support is one of the most important pieces of equipment in fully mechanized coal mining, and its stability and reliability will have a direct impact on fully mechanized coal mining. In order to deeply elucidate the dynamic working characteristics of a hydraulic support during lifting, lowering, and moving, and to provide theoretical support for further optimizing the stability and reliability of a hydraulic support, the dynamic characteristics of a hydraulic support are studied in this paper. Firstly, in order to study the dynamic working characteristics of hydraulic support lifting, a rigid–flexible coupling dynamic simulation model of a hydraulic support is established; in order to study the dynamic working characteristics of hydraulic support moving, a microcontact dynamic model of a hydraulic support and the caving face roof and floor based on G-W contact theory is proposed, and the first rigid–flexible–mechanical–hydraulic coupling dynamic simulation system of a hydraulic support and the roof and floor of a caving face is established in the industry. Then, based on this foundation, simulation experiments are conducted for hydraulic support lifting, moving without pressure, and moving with pressure, respectively. The working characteristic parameters of the hydraulic support are collected and analyzed. The results show that working speed, working height, surface contact conditions, residual working resistance, and impact load have different effects on the stability and reliability of the hydraulic support. This study can provide in-depth technical support and theoretical guidance for understanding and improving the dynamic working characteristics of the hydraulic support.

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“…With the rapid development of high-tech industries and the increasing demand for reliability, precision and life span of hydraulic systems, hydraulic systems are speeding towards high pressure, high stability and high force-to-weight ratio. However, along with the increasing oil pressure and forceto-weight ratio coefficients in hydraulic systems, the problem of impact vibration in hydraulic actuators has suddenly become more and more obvious, which causes serious impacts in high-precision control applications and leads to a significant reduction in the reliability and component life of hydraulic systems [1]. Therefore, the research on impact resistance of hydraulic actuators has become more and more critical, such as hydraulic impact under high loads, sudden load impact under high-frequency commutation, and shaft system displacement control under high precision [2].…”

Section: Introductionmentioning

confidence: 99%

Experiment and analysis of drop-weight damping control of MR semi-active impact resistance-based hydraulic actuator

Ma,

Huang,

Tang

et al. 2023

Smart Mater. Struct.

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The impact vibration caused by sudden changes in the external load of hydraulic actuators reduces the service life of hydraulic components and limits the high-precision applications of hydraulic actuators. Therefore, to improve the underdamped characteristics and impact resistance of valve-controlled cylinder systems, a semi-active impact resistance control of hydraulic actuator based on magnetorheological damper (MRD) is proposed. Firstly, based on the shear force characteristics of magnetorheological fluid, a multi-stage flow channel MRD is designed, which is connected in series with the hydraulic actuator to form a Hydraulic Damping Actuator (HDA). Meanwhile, based on the mechanical experimental data, the parameters of MRD dynamic model are identified to ensure the accuracy of MRD output force. Secondly, a drop weight impact model is established, and a sliding mode controller which can track the command current in real time is designed, so as to realize the resistance force coupling between the MRD and the hydraulic actuator for improving the impact resistance control effect. Then the dynamic performance test and impact resistance simulation program are established to verify the excellent dynamic performance and impact resistance effect of the HDA with the sliding mode control. Finally, the drop weight impact experimental platform is built. The experimental results show that under the impact with a height of 200 mm, the dynamic offset of the HDA is only -1.14 mm, and the time to return to the original position is 0.07 s, which validate the excellent performance of the proposed scheme in improving the underdamped characteristics of the valve-controlled cylinder system and the dynamic response performance of the hydraulic actuator.

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Performance analysis of the new balance jack of anti-impact ground pressure hydraulic support

Cited by 7 publications

References 13 publications

Study on the influence of pin shaft clearance on the bearing performance of the hydraulic support

Study on the influence of pin shaft clearance on the bearing performance of the hydraulic support

Study on Working Characteristics of 4-Column Hydraulic Support in Lifting–Lowering–Moving State Based on Microcontact Theory and Rigid–Flexible–Mechanical–Hydraulic Coupling Simulation Model

Experiment and analysis of drop-weight damping control of MR semi-active impact resistance-based hydraulic actuator

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