A cooling rotary joint for PCVD deposition lathe and its application method

CN117662886BActive Publication Date: 2026-05-26YANGTZE OPTICAL FIBRE & CABLE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANGTZE OPTICAL FIBRE & CABLE CO LTD
Filing Date
2023-11-29
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing PCVD deposition lathes have problems with their rotary chucks, such as loose pulleys, lack of cooling systems, complex structures, small airflow channel diameters, and lack of purging functions, which affect the processing quality of optical fiber preforms and the efficiency of equipment maintenance.

Method used

By employing gear transmission, a cooling structure, a gradual airflow channel, and a purging function, the transmission control accuracy is improved, the temperature of the seals and bearings is reduced, the diameter of the airflow channel is increased, and a purging inlet is provided to ensure smooth flow of gas and dust.

Benefits of technology

This improved the rotational accuracy and service life of the rotary chuck, reduced maintenance frequency, ensured the processing quality and consistency of optical fiber preforms, and reduced dust accumulation and temperature rise issues.

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Abstract

This invention discloses a coolable rotary joint for a PCVD deposition lathe, comprising a fixed head and a rotating head. The fixed head includes a fixed base and a housing; the fixed base and housing form a cooling channel; a second sealing ring and a third sealing ring respectively achieve static water flow sealing between the housing and the two ends of the fixed base; the rotating head includes a mandrel and a driven gear; the airflow channel of the mandrel is connected to the airflow channel of the fixed base; the driven gear is mounted on the mandrel; the fixed base and the mandrel rotate through bearing cooperation and are sealed by sealing rings. This invention also provides a method of using the coolable rotary joint for a PCVD deposition lathe. This invention uses gear transmission, which improves transmission control accuracy and helps improve the deposition quality of PCVD processing of optical fiber preforms; the cooling structure improves the service life of sealing rings, bearings, etc.
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