Gas inlet end rotary sealing device for chemical deposition of optical fiber preform
An optical fiber preform and chemical deposition technology, which is applied in manufacturing tools, glass manufacturing equipment, etc., can solve the problems of mixing chemical gas, polluting the inner cavity of optical fiber preform, affecting the deposition quality of optical fiber preform, etc.
Active Publication Date: 2021-05-14
FENGHUO COMM SCI & TECH CO LTD +1
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Problems solved by technology
[0005] The embodiment of the present application provides a rotary sealing device at the inlet end for the chemical deposition of optical fiber preforms to solve the problem of eccentricity caused by the deviation of the rotary joint of the split structure in the related art, and the waste and powder generated by the rotary friction will be Falling into the inner hole of the rotating shaft of the rotary joint, mixing chemical gas, polluting the inner cavity of the optical fiber preform, thus affecting the deposition quality of the optical fiber preform
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[0027] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.
[0028] The embodiment of the present application provides a rotary sealing device at the inlet end for chemical deposition of an optical fiber preform, which can solve the problem of eccentricity caused by the deviation of the rotary joint of the split structure in the related art, waste debris generated by rotating friction, The powder...
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The invention relates to a gas inlet end rotary sealing device for optical fiber preform chemical deposition, and belongs to the technical field of MCVD rod manufacturing equipment, the gas inlet end rotary sealing device comprises a main shaft, a first through hole and a second through hole are formed in the main shaft in the length direction of the main shaft, and the axis of the first through hole is collinear with the axis of the main shaft; and an outlet of the first through hole and an outlet of the second through hole intersect at the tail end of the main shaft. An outlet of the first through hole is rotationally and hermetically connected with a liner tube, an injection tube is arranged in the first through hole, the tail end of the injection tube extends into the liner tube, and an annular channel communicated with the second through hole is formed between the injection tube and the liner tube. The main shaft provided by the invention adopts one-time processing to improve the precision of parts, and the coaxiality of the injection pipe and the liner pipe can be controlled within [phi] 0.02 mm, so that the situation that waste chips and powder generated by relative rotation interference or friction of the injection pipe and the liner pipe are mixed into raw material gas to pollute the inner cavity of the optical fiber preform is avoided, and the problem that bright spots are generated in the rod manufacturing process of the optical fiber preform is prevented.
Description
technical field [0001] The present application relates to the technical field of MCVD rod manufacturing equipment, in particular to a rotary sealing device at the inlet end for chemical deposition of optical fiber preform rods. Background technique [0002] Due to its particularity, the MCVD rod making equipment needs to use two parts, the rotary joint and the injection pipe, for raw material transportation and equipment sealing during the rod making process; the original rotary joint is spliced by simple aluminum alloy profiles, and the feeding part is also passed through polymer It is processed and assembled from tetrafluoroethylene material, and the sealing performance and stability fluctuate greatly during use. MCVD rod making equipment has extremely high requirements on the sealing of the head. The rotary seal between the liner and the head, and the rotary seal between the injection pipe and the rotary joint determine the bright spots and attenuation problems in the r...
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Login to View More IPC IPC(8): C03B37/018
CPCC03B37/018
Inventor 祝威罗文勇杜城丁旭罗义余舜辉
Owner FENGHUO COMM SCI & TECH CO LTD