Determination of radial pressure distribution on the wall of the press channel of a novel biomass single die pelletiser

Trinh, Quyen V.; Nagy, Sándor; Faitli, József; Csõke, Barnabás

doi:10.1007/s00107-020-01585-y

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…A pellet mill is an important machine in the biomass energy and food industries [1]. The primary parts of the pellet mill operate continuously for a long time under high-temperature and high-humidity conditions [2]; hence, they are prone to rolling bearing faults, especially compound faults. However, the compound faults are difficult to be diagnosed [3,4].…”

Section: Introductionmentioning

confidence: 99%

Integrated fault diagnosis of rolling bearings based on improved multichannel singular spectrum analysis and frequency–spatial domain decomposition

Sun¹,

Sun²,

Wang³

2022

Meas. Sci. Technol.

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Extensive fault information can be obtained from the vibration signals of rotating machines with faulty rolling bearings. However, the diagnosis of compound faults is challenging because of their easy mix-ups, which can lead to faulty diagnosis and judgment. This study improves the multichannel singular spectrum analysis (MSSA) by using convex optimization. In addition, an integrated fault diagnosis technology for rolling bearings using an improved MSSA and frequency–spatial domain decomposition (FSDD) was developed. This approach involves two primary stages: signal preprocessing and fault diagnosis. The proposed method was tested to diagnose faults in the rolling bearings of pellet mills. Signal preprocessing can significantly improve the quality of a vibration signal and preserve modal information that characterizes a fault. Fault diagnosis identifies the modal parameters entirely and accurately from the reconstructed vibration signal, and determines the degree of damage. The proposed method can aid in the robust diagnosis of faulty rolling bearings under severe operating conditions.

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Section: Introductionmentioning

confidence: 99%

Integrated fault diagnosis of rolling bearings based on improved multichannel singular spectrum analysis and frequency–spatial domain decomposition

Sun¹,

Sun²,

Wang³

2022

Meas. Sci. Technol.

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“…The piston flow theory was applied to the pressure of the screw press, and it was discovered that the optimal die entry angle depends on the yield strength of the compacting material and the friction coefficient of the interface between the die and the compacting material [15]. When the briquetting machine is working, the radial load causes the radial strain of the straw, and the inner wall of the ring die hole will hinder the radial strain of the straw, so radial pressure and friction will be generated, so that the straw is continuously compressed in the ring die hole [16]. The periodic variation of the extrusion force was the main reason for the vibration of the briquetting machine, which shortens the life of the ring die and reduces its reliability and stability [17].…”

Section: Introductionmentioning

confidence: 99%

Structural Model of Straw Briquetting Machine with Vertical Ring Die and Optimization of Briquetting Performance

et al. 2022

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The solidification and molding of straw has been an effective method for comprehensive utilization of straw resources. However, the existing die-roll extrusion-type straw briquetting machine has challenges, such as the easy blockage of ring die holes and the unstable quality of the briquette. In this paper, the influence of four factors, including moisture content of straw, molding temperature, clearance between die and roller, and spindle speed on the quality of the briquette were studied. The regression model of the relaxed density and impact resistance of the briquette were established to obtain the optimal values of these factors to provide the best parameters for producing straw briquette. The results indicate that under the experimental conditions of moisture content 22.335%, temperature 85.127 °C, clearance between die and roller 3.099 mm, and spindle speed 172.712 r/min, the maximum relaxed density and impact resistance of the briquette were 1.144 g/cm3 and 74.76%, respectively. The performance of the briquette already meets the requirements for combustion, transportation, and storage.

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“…due to the fact that biomass densification is strongly influenced by a multitude of disruptive factors, whose study requires deepening, both from a theoretical and experimental point of view. For this reason, it is important to take into account these disruptive factors in conducting experiments and in interpreting data in a direct connection with the conditions for conducting experimental tests [10,11].…”

Section: Introductionmentioning

confidence: 99%

Influence of Input and Control Parameters on the Process of Pelleting Powdered Biomass

et al. 2021

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This paper presents theoretical and experimental research studying the influence of process parameters on the quality of biomass pellets. A validated mathematical model was developed, expressing the density of biomass pellets as determined by moisture content, compression pressure, process heat, the initial density of the material, pelleting speed and initial volume of the material. The experiments for determining the influence of these parameters on the compression of biomass into pellets and optimizing the process were conducted on a heated single pellet compression device, using fir sawdust as raw material. To describe and study the process, four input and control parameters were varied—raw material moisture, pelleting speed, maximum force applied and pelleting die temperature. From the experiments, it was noticed that overall, moisture and pressure have the most important effect on the compression process and pelleting speed, and heat applied also affected the process. Pellet density decreased when pelleting speed and material moisture increase and the density increased with a higher compression pressure and higher heat during the process.

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Determination of radial pressure distribution on the wall of the press channel of a novel biomass single die pelletiser

Cited by 5 publications

References 23 publications

Integrated fault diagnosis of rolling bearings based on improved multichannel singular spectrum analysis and frequency–spatial domain decomposition

Integrated fault diagnosis of rolling bearings based on improved multichannel singular spectrum analysis and frequency–spatial domain decomposition

Structural Model of Straw Briquetting Machine with Vertical Ring Die and Optimization of Briquetting Performance

Influence of Input and Control Parameters on the Process of Pelleting Powdered Biomass

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