Effekte der Größenskalierung auf die Funktionsfähigkeit kombinierter Wälz-Gleitlager

Sinz, Julian; Groche, Peter

doi:10.51202/9783181023488-55

Cited by 2 publications

(5 citation statements)

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“…Designed properly, the roller bearings bear the largest share of the load at low circumferential speeds and operating forces, while the plain bearings carry a larger ratio of the force with increasing speeds and loads. This load transfer has already been proven experimentally [131,245].…”

Section: Discussionmentioning

confidence: 64%

“…Pioneers of such a machine technology are servo presses with an almost freely adjustable motion kinematics of the ram, thus rendering optimised motion and speed sequences of the tools possible. Due to the almost speed-independent nominal torque of servo motors, servo presses can be used to achieve high accelerations, as well as standstills under high loads [245]. This allows both, the application limits of presses to be significantly extended [214], and the cycle time to be reduced [130].…”

Section: State Control Of Combined Roller and Plain Bearingsmentioning

confidence: 99%

“…However, the increase in machine flexibility and the extension of the application limits also result in new, challenging load scenarios for the machine elements. Since these requirements can no longer be met by pure plain or roller bearings, acceleration in servo presses is usually limited and, therefore the potentials of servo technology in presses cannot be fully exploited [245].…”

Section: State Control Of Combined Roller and Plain Bearingsmentioning

confidence: 99%

“…This allows high loads to be transmitted and at the same time prevents backlash during start-up. Therefore, combined roller bearings offer great potential to meet the increasing requirements in the field of bearing supports for servo presses [245].…”

Section: State Control Of Combined Roller and Plain Bearingsmentioning

confidence: 99%

“…If angular contact ball bearings are used, a variable preload of the roller bearings can be achieved by means of additional bearing caps. The plain bearing, which is supplied with lubricant via a bore in the bearing shell, can be preloaded by increasing the supply pressure [245]. The combination of the three bearings creates a statically over-determined system, which makes a robust design necessary for industrial use.…”

Section: State Control Of Combined Roller and Plain Bearingsmentioning

confidence: 99%

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Methods and Technologies for Mastering Uncertainty

Groche

Abele

Groche

et al. 2021

Springer Tracts in Mechanical Engineering

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Uncertainty affects all phases of the product life cycle of technical systems, from design and production to their usage, even beyond the phase boundaries. Its identification, analysis and representation are discussed in the previous chapter. Based on the gained knowledge, our specific approach on mastering uncertainty can be applied. These approaches follow common strategies that are described in the subsequent chapter, but require individual methods and technologies. In this chapter, first legal and technical aspects for mastering uncertainty are discussed. Then, techniques for product design of technical systems under uncertainty are presented. The propagation of uncertainty is analysed for particular examples of process chains. Finally, semi-active and active technical systems and their relation to uncertainty are discussed.

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Section: Discussionmentioning

confidence: 64%

Section: State Control Of Combined Roller and Plain Bearingsmentioning

confidence: 99%

Section: State Control Of Combined Roller and Plain Bearingsmentioning

confidence: 99%

Section: State Control Of Combined Roller and Plain Bearingsmentioning

confidence: 99%

Section: State Control Of Combined Roller and Plain Bearingsmentioning

confidence: 99%

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Methods and Technologies for Mastering Uncertainty

Groche

Abele

Groche

et al. 2021

Springer Tracts in Mechanical Engineering

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Mastering Uncertain Operating Conditions in the Development of Complex Machine Elements by Validation Under Dynamic Superimposed Operating Conditions

Germann

Martin

Kubik

et al. 2021

Lecture Notes in Mechanical Engineering

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Machine elements produced in large quantities undergo several development cycles and can be adapted from generation to generation. Thus, experiences from real operation can be taken into account in further development. This is not possible for innovative investment goods such as special purpose machines, as these are usually individual items. Therefore, functionality and quality of newly developed components must be assured by previous investigations.Conventional methods are inadequate at this point, as they cannot represent the actual, complex operating conditions in the later application. A reliable statement about the behavior of the system through a comprehensive validation in laboratory tests under standardized conditions is not achievable in this way due to a multitude of diversified load cases.In previous work, a method was developed to allow testing of machine elements in the laboratory under detuned operating conditions. For this purpose, disturbance variables are applied to the system using paraffin wax phase change actuators in order to simulate real operation states and to analyze the behavior of the machine element under these conditions. The investigated disturbance variables are fluctuations and asymmetries of the operating load through superimposed temperature gradients. Complex interactions between the machine element and the adjacent components or the overall system can thus be taken into account.The functionality of the methodology has been developed and briefly demonstrated so far. This paper presents the next level within the development process of the methodology. The necessary components are explained in detail and an AI black box evaluation tool is discussed. This work is based on a test bench that applies dynamically changing states of detuning under superimposed disturbances. Additionally, energy efficiency and performance of the test setup is advanced. As presented, the method opens up the possibility of validating new machine elements in the laboratory under realistic conditions.

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Effekte der Größenskalierung auf die Funktionsfähigkeit kombinierter Wälz-Gleitlager

Cited by 2 publications

References 0 publications

Methods and Technologies for Mastering Uncertainty

Methods and Technologies for Mastering Uncertainty

Mastering Uncertain Operating Conditions in the Development of Complex Machine Elements by Validation Under Dynamic Superimposed Operating Conditions

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