Multi-channel rotating joint

Abstract

The invention discloses a multi-channel rotating joint. The multi-channel rotating joint comprises an outer shell and a rotating shaft. The multi-channel rotating joint is characterized in that the outer shell comprises an outer sleeve and a rear cover; a mounting cavity is formed in the outer sleeve; the rotating shaft is rotatably arranged in the mounting cavity and internally provided with multiple first conveying holes; the side wall of the outer sleeve is provided with a first guiding-in hole matched with the first conveying holes, and the first conveying hole in the corresponding position communicates with the first guiding-in hole to form a first conveying channel; the rotating shaft is internally provided with a second conveying hole which is through in the front-back direction; the front end face of the rear cover is provided with a mounting sunken cavity; the rear end of the rotating shaft extends into the mounting sunken cavity; the rear cover is provided with a second guiding-in hole, and the second guiding-in hole communicates with the second conveying hole to form a second conveying channel; and a rotating shaft seal is arranged between the rear end of the rotating shaft and the mounting sunken cavity. The multi-channel rotating joint has the advantages that the structure is simple, and the cost is low; the influence on the rotating speed of the rotating shaft issmall while the sealing performance is guaranteed; and thus, the service life is effectively prolonged.

Description

technical field [0001] The invention relates to a rotary joint, in particular to a multi-channel rotary joint. Background technique [0002] The rotary joint usually includes an outer casing and a rotating shaft arranged in the outer casing, which is mainly used to introduce the oil circuit or the air circuit into the high-speed rotating rotary mechanism to realize the control and distribution of the oil circuit or the gas circuit in the rotary mechanism. Rotary joints can be divided into single-channel rotary joints and multi-channel rotary joints according to the number of conveying channels, where multi-channel rotary joints can be used to introduce two or more different media into the high-speed rotating shaft through different channels. At present, the existing multi-channel rotary joints are usually provided with a plurality of conveying holes along the axial direction of the rotating shaft in the rotating shaft, and an introduction hole matched with the conveying hole...

AI Technical Summary

Problems solved by technology

At present, the existing multi-channel rotary joints are usually provided with a plurality of conveying holes along the axial direction of the rotating shaft in the rotating shaft, and an introduction hole matched with the conveying holes is arranged on the side wall of the outer shell of the joint. The inlet holes are matched and communicated to form a conveying channel. In order to avoid leakage and mixing of different media during the conveying process (that is, to realize the sealing between each conveying channel), multiple rotary oil seals are usually set between the rotating shaft and the outer shell to realize The separation between adjacent conveying passages, however, the setting of so many rotary oil seals results in a large friction force between the rotating shaft and the outer casing, which greatly reduces the maximum rotational speed that the rotary joint can withstand. At the same time, due to the high The existence of friction makes the rotary joint generate a lot of heat during the working process, and the overall temperature is high during the entire use process, which greatly reduces the service life of the product

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