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Fatigue life analysis of slewing bearings in wind turbines - …

1/6/2018· The theoretical life calculation method for slewing bearings is cuersome and not suitable for all types of slewing rings . Zaretsky et al. used a Monte-Carlo method to simulate the fatigue of a rolling bearing with rigid support and compared the service life of bearings with different types of bearing steel [28] .

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Circular domain features based condition monitoring for low speed slewing bearing

This paper presents a novel appliion of circular domain features calculation based condition monitoring method for low rotational speed slewing bearing. The method employs data reduction process using piecewise aggregate approximation (PAA) to detect frequency alteration in the bearing signal when the fault occurs. From the processed data, circular domain features …

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Raft foundation- Advantages, Disadvantages, and Methods of …

On the basis of support on. On the basis of structural component. Bearing capacity and settlement of mat foundation. 1) In Cohesion less soil. 2) In Cohesive soil. Design of the Raft foundation. 1) Rigid beam method (conventional method) 2) Simplified Elastic method. 3) Elastic method.

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Slewing - Wikipedia

Slewing is the rotation of an object around an axis, usually the z axis. An example is a radar scanning 360 degrees by slewing around the z axis. This is also common terminology in astronomy. The process of rotating a telescope to observe a different region of the sky is referred to as slewing. The term slewing is also found in motion control

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Peng DING | PhD Student | M.S. degree in mechatronic engineering …

The monitoring data of slewing bearing is massive. In order to establish accurate life prediction model from complex vibration signal of slewing bearing, …

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Slewing - Wikipedia

Slewing is the rotation of an object around an axis, usually the z axis. An example is a radar scanning 360 degrees by slewing around the z axis. This is also common terminology in astronomy. The process of rotating a telescope to observe a different region of the sky is referred to as slewing. The term slewing is also found in motion control

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SKF Drive-up Method | SKF

The method incorporates the use of an SKF HMV ..E hydraulic nut fitted with a dial indior, and a high accuracy digital pressure gauge, mounted on the selected pump. The correct fit is achieved by controlling the axial drive-up of the bearing from a pre-determined

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Bearing installation and removal basics | Processing Magazine

9/11/2017· If the bearing is removed using a high-speed, cut-off tool, and if it is used carelessly, the shaft and housing may be damaged. Although size and space limitations sometimes dictate the necessity of this method, any subsequent nicks and gouges on the shaft or in the housing result in metal removal.

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How To Select The Right Slewing Crane For A Particular Appliion …

30/9/2014· First is the supporting method of the jib arm. The simplest is for the bearings to be attached right to an existing structure like a wall or building column. A wall mounted crane will be rotate up to 180 degrees, while column mounted will be limited to 270 degrees of slew. Secondly, if the king post tilts from the vertical, the jib arm will

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‪Peng Ding / ()‬ - ‪Google Scholar‬

Y Cao, M Jia, P Ding, Y Ding. Measurement 178, 109287. , 2021. 8. 2021. MDCCS based multistage life prediction of slewing bearing with a novel performance description: An improved variational mode decomposition approach. P Ding, H Wang, YF Dai, J Chen, H Zhang, FZ Sun. Experimental Techniques 43 (3), 341-358.

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Sleeve Bearing Fault Diagnosis and Classifiion

The bearing diagnosis proposed method is a tree steps process (see Fig. 2). The first step is vibration signal measurement, the second step is a time-frequency analysis and the third step deals with fault classifiion using feature extraction. We measured by

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Products for railway appliions - Schaeffler Group

Plasma spraying method J20B / J20A / J20AA 7 Bearing arrangements for drive units Traction motor bearing arrangements Current-insulated bearings for traction motors from European manufacturers The oxide ceramic is applied to the bearing surfaces using the

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slewing drive

5/11/2018· slewing drive. The slewing drive is a gearbox that can safely hold radial and axial loads, as well as transmit a torque for rotating. The rotation can be in a single axis, or in multiple axes together. Slewing drives are made by manufacturing gearing, bearings, seals, housing, motor and other auxiliary components and asseling them into a

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Products for railway appliions - Schaeffler Group

Plasma spraying method J20B / J20A / J20AA 7 Bearing arrangements for drive units Traction motor bearing arrangements Current-insulated bearings for traction motors from European manufacturers The oxide ceramic is applied to the bearing surfaces using the

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Online residual useful life prediction of large-size slewing bearings—A data fusion method …

8/2/2017· POTOCNIK R, FLASKER J, GLODEZ S. Fatigue analysis of large slewing bearing using strain-life approach [C]// 12th International Conference on Fracture 2009. Ottawa, 2009: 3891–3898. Google Scholar [2] POTOCNIK R, GONCZ P, FLASKER J

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3D Simplified Finite Elements Analysis of Load and Contact Angle in a Slewing Ball Bearing …

10/7/2008· This paper presents a 3D finite element (FE) simplified analysis of load distribution and contact angle variation in a slewing ball bearing. The key element of this methodology, which is based on the Hertz theory, is modeling the rolling elements under compression by nonlinear traction springs between the centers of curvature of the raceways.

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Fatigue life analysis of slewing bearings in wind turbines - …

1/6/2018· The theoretical life calculation method for slewing bearings is cuersome and not suitable for all types of slewing rings . Zaretsky et al. used a Monte-Carlo method to simulate the fatigue of a rolling bearing with rigid support and compared the service life of bearings with different types of bearing steel [28] .

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Mounting and Dismounting of Rolling Bearings

Rolling bearings are heavy-duty machine elements with high-preci - sion components. In order to fully utilize their capacity, the design en-gineer must select the right bearing type and design and match the bearing properties to those of the mating components.

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3D Simplified Finite Elements Analysis of Load and Contact Angle in a Slewing Ball Bearing …

10/7/2008· This paper presents a 3D finite element (FE) simplified analysis of load distribution and contact angle variation in a slewing ball bearing. The key element of this methodology, which is based on the Hertz theory, is modeling the rolling elements under compression by nonlinear traction springs between the centers of curvature of the raceways.

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BEARING DESIGNATION SYSTEMS

bearing series code using a slash in the case of bearings with bore sizes that cannot be divided by five, e.g. 63/22. 1 Basic designations BEARING DESIGNATION SYSTEMS 13 14 1.3 Letters and their different meanings Prefixes and suffixes can have different

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Analysis of the Mechanical Properties of Slewing Bearings Using Finite Element Method …

Abstract: Slewing bearings are the basic structural components widely used in construction machinery industry. Their stress status and distribution have great influence on the service life. [3] G. Piras, W.L. Cleghorn, J.K. Mills, Dynamic finite-element analysis of a planar high-speed, high-precision parallel manipulator with flexible links, Mechanism and Machine Theory 40 (7) (2005) …

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Sleeve Bearing Fault Diagnosis and Classifiion

The bearing diagnosis proposed method is a tree steps process (see Fig. 2). The first step is vibration signal measurement, the second step is a time-frequency analysis and the third step deals with fault classifiion using feature extraction. We measured by

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TIMKEN ENGINEERING MANUAL

OVERVIEW TIMKEN TIMKEN ENGINEERING MANUAL 3 INCREASE YOUR EQUIPMENT UPTIME In addition to high-quality bearings and mechanical power transmission components, we provide valuable integrated products and services. For example, we offer

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Liebherr Slewing Bearings Product Line Brochure

Slewing Bearings by Liebherr 3 The Liebherr Group is one of the leading global manufacturers of slewing bearings and has more than 60 years experience in the development, design and manufac - ture of ball an roller bearing slewing rings. More than 350,000 large

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Fatigue life analysis of slewing bearings in wind turbines - …

1/6/2018· The theoretical life calculation method for slewing bearings is cuersome and not suitable for all types of slewing rings . Zaretsky et al. used a Monte-Carlo method to simulate the fatigue of a rolling bearing with rigid support and compared the service life of bearings with different types of bearing steel [28] .

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Peng DING | PhD Student | M.S. degree in mechatronic engineering …

The monitoring data of slewing bearing is massive. In order to establish accurate life prediction model from complex vibration signal of slewing bearing, …

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Bearing life – Calculating the basic fatigue life expectancy of rolling bearings

A bearing’s basic fatigue life rating is calculated using the nuer of rotations which 90% of all bearings in a specifi c group achieve or exceed a calculated time without failure (probability of failure: 10%). A standardised formula – also known as the aloguelife.

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How To Select The Right Slewing Crane For A Particular Appliion …

30/9/2014· First is the supporting method of the jib arm. The simplest is for the bearings to be attached right to an existing structure like a wall or building column. A wall mounted crane will be rotate up to 180 degrees, while column mounted will be limited to 270 degrees of slew. Secondly, if the king post tilts from the vertical, the jib arm will