{"id":4938,"date":"2024-11-09T13:21:33","date_gmt":"2024-11-09T13:21:33","guid":{"rendered":"https:\/\/swingbearing.net\/?p=4938"},"modified":"2024-11-10T13:16:48","modified_gmt":"2024-11-10T13:16:48","slug":"common-causes-and-solutions-for-excavator-swing-bearing-tooth-breakage","status":"publish","type":"post","link":"https:\/\/swingbearing.net\/nb\/common-causes-and-solutions-for-excavator-swing-bearing-tooth-breakage\/","title":{"rendered":"Vanlige \u00e5rsaker til og l\u00f8sninger p\u00e5 brudd i svinglager for gravemaskiner"},"content":{"rendered":"

Sammendrag<\/h2>\n\n\n\n

The excavator swing bearing is an essential component that plays a pivotal role in the rotational movement of heavy machinery. It not only supports the weight of the upper structure but also handles the working loads during operation. Given the high demands placed on these bearings, they are often subjected to heavy loads and harsh conditions, making them prone to tooth breakage. This article explores the primary reasons for tooth failure in excavator swing bearings and provides practical solutions for addressing these issues.<\/p>\n\n\n\n

Overview of Swing Bearing Tooth Breakage<\/h2>\n\n\n\n

Svinglager<\/a><\/strong> are integral to the smooth and efficient operation of excavators, enabling the machine to rotate left and right. The gear teeth of these bearings mesh with the pinion to transmit motion. However, due to factors like high operational loads, misalignment, and inadequate maintenance, the teeth of swing bearings are susceptible to damage. Tooth breakage can occur early in the lifecycle of the bearing, often within the first year of use, if not properly addressed.<\/p>\n\n\n\n

Key Causes of Swing Bearing Tooth Breakage<\/p>\n\n\n\n

The reasons for tooth breakage in excavator swing bearings are varied but often stem from internal meshing issues, improper clearance, and the effects of radial forces. Let\u2019s examine these causes in detail.<\/p>\n\n\n\n

Internal Meshing Issues and Radial Extrusion<\/h2>\n\n\n\n

The majority of tooth breakages in swing bearings involve internally meshing gears with hard tooth surfaces. Bearings with external meshing and soft tooth surfaces are less prone to this issue. In most cases, tooth failure results from the radial oblique extrusion that occurs during operation. The pinion, driven by a floating shaft, tends to shift slightly due to the high overturning moments exerted during heavy-duty tasks. This shift creates an inclination and radial displacement, altering the center distance of the gear transmission and increasing the stress on the gear teeth.<\/p>\n\n\n\n

Over time, the factory-set clearance in swing bearings (typically less than 0.2 mm) may increase, leading to deformation in the raceway and greater tooth wear. If these changes are not accounted for during maintenance, the risk of tooth breakage escalates.<\/p>\n\n\n\n

Solutions for Preventing Swing Bearing Tooth Breakage<\/h2>\n\n\n\n

Several strategies can be employed to mitigate the risk of tooth breakage in excavator swing bearings. Below are practical solutions based on industry best practices.<\/p>\n\n\n\n

Maintain Proper Gear Tooth Clearance<\/h2>\n\n\n\n
\"Svinglager<\/a><\/figure>\n\n\n\n

One of the most critical aspects of preventing tooth breakage is ensuring the correct clearance between the meshing gears. For a standard 20-ton excavator, the recommended module for the swing bearing gear is 10 mm, with the backlash (gap between the large gear and the pinion) set at 0.6 mm or greater. In many cases, customers may overlook the importance of this clearance, leading to increased wear and a higher likelihood of tooth breakage.<\/p>\n\n\n\n

Action Plan:<\/strong><\/p>\n\n\n\n