Excavator accessories self-lubricating bearings
The excavator is divided into a loading part, a loading part, and a working device part. The working device, as the name implies, is the part used for work. The excavator is the boom, the arm, the bucket, and some have a ripper. The most important thing is the hydraulic system, the main pump, the main cutting, the pilot system and so on. The application of self-lubricating bearings in hydraulic excavators has 12 application parts of self-lubricating bearings, which are mainly used in booms, sticks, chassis running mechanisms, body parts, hydraulic components and other components.
The structural parts of the excavator working device and the oil red are connected by pins at each connecting hinge point and the support seat, which bears a large load during operation, and the wear between the mutually moving parts is also large. At the same time, during operation, the bearing characteristics of the excavator working device For high load and low speed.
In addition, when the excavator is excavating and carrying soil, the working device rotates frequently and has a high repetition frequency under the action of each oil cylinder, that is, the relative movement of the abrasive parts is frequent. Reliable, so it is suitable to use solid self-lubricating bearings on the working device of the excavator.
Why use self-lubricating bearings
In the past, copper sleeves and steel sleeves were used in these parts, but they were prone to pulling, occlusal locking, loud noise and vibration, as well as a lot of grease consumption. In addition, the working environment of excavators is generally harsh. In actual work, there will be many factors that cause the failure of the sliding bearing. The following are the reasons for the failure of the sliding bearing:
(1) The working environment of the equipment is harsh: when the excavator is working, most of the equipment is in a dusty site, and when the shaft and the shaft hole are not completely sealed, dust particles will fly into the matching gap, especially It is more serious in the case of wear and tear. These dust particles destroy the lubricating effect of the lubricating oil film, and act as abrasive particles in the cooperation between the shaft and the hole, causing abnormal wear of the shaft hole.
(2) The impact load is large. Most excavators work under heavy load and low speed, and the construction machinery itself has a huge structure. The impact force generated by this vibration can easily exceed the pressure limit of the lubricating oil film, resulting in the loss of lubricating function. The use of solid inlaid self-lubricating bearings will not work. Such a problem occurs.
(3) The working surface of the stope is uneven. The ground in which the excavator works is generally uneven. When working or walking, strong vibration will occur, causing impact load, serious adverse effects on lubrication, and bearing failure.
(4) Insufficient lubricating oil injected. The shaft of the traveling mechanism of the excavator and the shaft hole are not completely sealed. For this reason, the lubricating oil will be gradually squeezed out of the matching space during operation. At this time, if the lubricating oil cannot be replenished in time, the shaft hole will be matched direct contact, resulting in abnormal wear.