The use of central rotary joint in excavators

Why can the excavator cab rotate infinitely 360 degrees without the oil pipes getting tangled or knotted? The central adapter plays a crucial role. Firstly, let’s understand the working principle of an excavator: it consists of three parts: the upper rotating body (engine, cab, etc.), the lower walking body (walking part), and the working device.

The upper rotating body can rotate 360 ° with the lower walking body. When the body is stopped, the hydraulic transmission system uses a hydraulic pump to transmit the power of the engine to the hydraulic motor, hydraulic cylinder and other actuating components, pushing the working device to move and complete various operations. To start working, just “move” the corresponding operating lever. So how do the upper and lower parts of the excavator achieve 360 ° infinite rotation? The upper and lower parts of the excavator are not connected by ordinary pipelines, but use a hydraulic system as the power source, connected and transmitted through hydraulic oil pipes. Therefore, when the excavator rotates 360 ° flexibly, these oil pipes can be protected from damage, and the central swivel joint component plays an irreplaceable role. What is the crucial role of the central rotary joint in the 360 degree rotation of excavators? The central rotary joint is mainly composed of an internal core shaft, an external shell, and a rotating seal. Oil pipes and grooves are opened on both the shell and the core shaft, so that the inlet and outlet ports correspond one-to-one. At the same time, each oil passage is separated by a rotating seal, which is different from each other and does not interfere with each other. The outer shell is connected to the upper pipeline, and the internal core shaft is connected to the lower pipeline. When the oil circuit is pressurized and the central rotary joint works, the shell and the internal core shaft will produce relative motion, so they can turn freely within the circumference range, thus achieving continuous rotation. Tengxuan Technology’s central rotary joint has covered various models of 0.8T-80T excavators, becoming an important supporting supplier for major engineering machinery manufacturers;