Rotating joint

Abstract

The invention discloses a rotating joint installed on a machine tool body (4). The rotating joint comprises a joint outer shell (3) and a sealing mechanism, wherein the joint outer shell (3) is arranged in the machine tool body (4) in a sleeved mode, and the sealing mechanism is arranged in the joint outer shell (3). The end of the joint outer shell (3) is provided with a connection hole (1) connected with a main shaft. The sealing mechanism comprises a hollow joint core shaft (6), a disc-shaped sealing ring (8) and a spring (9), wherein the joint core shaft (6) is inserted into the joint outer shell (3), the disc-shaped sealing ring (8) is installed on the end face of a shaft head of the outer end of the joint core shaft (6), one end of the spring (9) is connected with the disc-shaped sealing ring (8), the other end of the spring (9) is clamped to the tail end of the joint outer shell (3), the inner end of the joint core shaft (6) can be connected with the machine tool body (4), and a cavity between the machine tool body (4) and the rotating joint can communicate with a through hole in the joint core shaft (6). Unlimited dry operation without medium pressure is effectively achieved through the rotating joint.

Description

technical field [0001] The invention relates to the technical field of machine tools, in particular to a rotary joint. Background technique [0002] Hydraulic leakage not only causes waste of oil materials, but also causes shutdown losses, environmental pollution, low system efficiency, and fire hazards. According to foreign data, before the implementation of leak prevention and control, the annual loss of hydraulic system leakage in the UK was as high as 180 million US dollars. According to incomplete statistics from American magazines, the leakage of hydraulic systems in factories across the United States costs 60 million U.S. dollars every year. According to the investigation report, it is found that the main leakage points of the hydraulic system are concentrated at the pipe joints, especially in the moving parts such as rotation. The role of the rotary joint is to input the liquid from the side of the pipeline into the rotating or reciprocating equipment, and then dis...

AI Technical Summary

Problems solved by technology

[0004] However, the rotary joint in the prior art has the following disadvantages: when the weight of the high-pressure rotary joint rotor is too large, the low-quality bearing will be crushed by the gravity of the rotor, causing the rotary joint to not rotate, and poor bearings cannot guarantee the concentricity of the rotor , it will make the rotary joint fit too large, resulting in a slight swing when rotating, which will affect the service life of the rotary joint; due to long-term use, the sealing element will be damaged and the lubrication effect will be affected; when the airport spindle speed is too high and The stator of the rotary joint is in contact with the rotor for a long time, and the service life of the rotary joint will be severely shortened

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