slewing bearing rocking test xzwd

Sep 13 2015JBT2300-slewing bearings 1 1 where the load must include additional load and test load For application occasions not listed in the table selection may be made by referring to the similar working conditions and applications in the table 3 7 Removal of Common Faults Too much rocking (clearance) After a new slewing bearing is Jan 14 2019Analysis of the reasons for the rapid consumption of the slewing ring In the process of use the slewing bearing should be replaced frequently because the slewing bearing has a lot of losses and the new slewing bearing should be replaced again after a certain period of time

Mitsubishi Heavy Industries Machinery Systems Ltd

Slewing bearing for Deck Crane Necessity of periodical Rocking test (559KB) EXAMPLE OF TROUBLE DUE TO LOOSENED FIXING BOLTS (for terminals etc ) (325KB) Deck Crane / Hyd oil temp low limit (Change of setting value) (104KB) INSPECTION MAINTENANCE FOR STRUCTURE OF OPERATOR'S CABIN (523KB)

Slewing bearings (slewing bearings) have unique load-bearing characteristics and are commonly used on lifting appliances excavators rotary tables wind turbines telescopes and tank turrets Thanks to improvements in machining methods and the renewal of design concepts today's slewing bearings can be used in smaller more complex and more

Dec 30 2011bearing must have rocking tests carried out in accordance with manufacturer's instructions to determine that the amount of wear in the bearing races is within permitted limits Although cranes with single ball race slew bearings are considered to be most at risk rocking

Slewing bearing for Deck Crane Necessity of periodical Rocking test (559KB) EXAMPLE OF TROUBLE DUE TO LOOSENED FIXING BOLTS (for terminals etc ) (325KB) Deck Crane / Hyd oil temp low limit (Change of setting value) (104KB) INSPECTION MAINTENANCE FOR STRUCTURE OF OPERATOR'S CABIN (523KB)

Dec 30 2011bearing must have rocking tests carried out in accordance with manufacturer's instructions to determine that the amount of wear in the bearing races is within permitted limits Although cranes with single ball race slew bearings are considered to be most at risk rocking

Slewing Bearing Rocking Test

The slewing bearing is an essential part of the rotating machinery and must be well maintained Over the years the slewing bearing will have some wear and to be able to know if there is a need for changing the slewing bearing it is needed to keep a record of the wear If do not make the slewing bearing rocking test maybe resulting in machinery losses and serious injury to personnel

Proper maintenance keeps large slewing ring bearings going Large-diameter bearings are custom-engineered and manufactured almost exclusively for lifting equipment that requires rotation These devices typically have a complex load spectrum: the slewing ring bearing can simultaneously handle all combinations of thrust radial and tilting moment

At a glance: six steps to save slewing ring bearings More than 96% of slewing ring failure could be avoided by following simple maintenance tips Grease regularly Apply a liberal shot of extreme-pressure grease to the fittings around the bearing's circumference at intervals recommended in the operator's manual Purge with grease

XT series slewing bearings are custom designed with a rectangular cross section and are available in sizes up to 218 inches OD (5500 mm) They are well suited for a wide range of applications where our standard product series do not meet demanding size capacity or weight requirements including cranes aerial lifts excavators wind turbines

1 5 1 The slewing ring bearing The slewing ring bearing is a key component on cargo deck cranes The main function of the slewing ring bearing is to provide a rotational attachment point to secure the rotating cargo deck crane to the fixed pedestal mount There are various types of slewing ring bearings designed by different manufacturers

1 About Rocking test (check of wear amount of slewing bearing) To grasp wear amount of slewing bearing check the difference of incline (change of gap amount) of slewing bearing from upper limit (minimum reach ) to lower limit (max reach) In detail please check attached procedure of rocking test 2 Interval : Every 6 month ・ If class has

For the Rocking Test Procedure we provide the following services to determine "Bearing Permissible Wear " To assess the condition of the bearing ABS/API procedures recommend that you first determine the initial clearance or normal wear rate first The Bearing Wear can be measured based upon the "Tilting Clearance Method " Tilting Clearance Measurement (Initial or the []

bearings provide practically no angular control of the shaft Instead they function in a manner similar to a ball joint If such a bearing implementation is set up to guide the shaft then the result will be gross runout metal-to-metal contact between the shaft and the

Acoustic emission

May 01 2016The slew bearing test rig used in this project is designed to monitor the vibration and AE signal of naturally degrading slew bearings rotating at very low speed Compared to typical bearing test rigs in the literature the size of the slew bearing test rig is much bigger Therefore it is a hard work to dismantle the slew bearing rig

Jan 14 2019Analysis of the reasons for the rapid consumption of the slewing ring In the process of use the slewing bearing should be replaced frequently because the slewing bearing has a lot of losses and the new slewing bearing should be replaced again after a certain period of time

Dec 28 2018Slewing ring bearings are used in applications for transferring/ supporting axial radial and moment loads singularly or in combination consisting of rings mounted with threaded fasteners and usually having a gear integral with one of the rings

Contents 1 General 2 Application 3 Selection and Sizing 4 Mounting 5 Slewing bearing gear 6 Inspection 1 Slewing Bearing Slew means to turn without change of place Slewing bearings are large-size rolling bearings that can accommodate axial radial and moment loads acting either singly or in combination and in any direction Can perform both slewing (oscillating) movements as well as

XT series slewing bearings are custom designed with a rectangular cross section and are available in sizes up to 218 inches OD (5500 mm) They are well suited for a wide range of applications where our standard product series do not meet demanding size capacity or weight requirements including cranes aerial lifts excavators wind turbines

The slewing bearing rocking test should be done periodically for the bearing wear tracking and early failure detection The measurement could be done from the inside and outside of pedestal Follow the maker's recommendations and conduct the test at the same check points as during the initial test during commissioning in order all subsequent

Feb 13 2019The soft zone is the disadvantage of the use of the slewing bearing if the the soft zone is in the correct installation position on the main machine the effect of this disadvantage of the slewing ring will be decreased so the installation position on the main machine is at the non-loaded zone on the slewing bearing in principle or at light

XT series slewing bearings are custom designed with a rectangular cross section and are available in sizes up to 218 inches OD (5500 mm) They are well suited for a wide range of applications where our standard product series do not meet demanding size capacity or weight requirements including cranes aerial lifts excavators wind turbines