Rotating disk apparatus for wind tunnel jet pipe

Abstract

The invention discloses a rotating disk apparatus for a wind tunnel jet pipe. The rotating disk apparatus for a wind tunnel jet pipe includes a center shaft, a center bearing, a pedestal, a rotating disk cover, a slewing back-up bearing, a hydraulic cylinder and the like, wherein the center shaft is fixed on a foundation and does not move; both the center bearing and the slewing back-up bearing rotate by taking the center shaft as a slewing center; the center bearing uses a deep groove ball bearing, and the inner ring of the center bearing sleeves the center shaft, and the outer ring of the center bearing is inlaid in the rotating disk cover; the slewing back-up bearing uses a three-row roller type slewing back-up bearing, and the inner ring of the slewing back-up bearing is connected with the rotating disk cover; and the outer ring of the slewing back-up bearing is connected with the pedestal fixed on the foundation. Therefore, through push-and-pull of the hydraulic cylinder, rotation of the rotating disk cover can be realized, so that a jet pipe at the top of the rotating disk cover is driven to turn by 90DEG. As the rotating disk apparatus for a wind tunnel jet pipe uses the general deep groove ball bearing and the three-row roller type slewing back-up bearing as the slewing members, the rotating disk apparatus for a wind tunnel jet pipe has the advantages of being simple in structure, being convenient in mounting, being high in positioning accuracy, being low in the cost of maintenance, being able to bear the100t load of the top of the rotating disk cover, and being able to satisfy the requirement for 90DEG turning of the wind tunnel jet pipe.

Description

technical field [0001] The invention relates to the field of test devices in wind tunnel tests. The bearing is used as a rolling body, the degree of freedom is defined as rotation by a central axis and a base, and a hydraulic cylinder is used as a power source to realize safe and reliable rotation of a nozzle at the top of a turntable by 90°. Background technique [0002] The wind tunnel nozzle is the core device for establishing different velocity flow fields in the wind tunnel. Its main function is to uniformly and stably accelerate the airflow to the design Mach number by changing the geometry of the inner wall of the nozzle. At present, solid-wall nozzles are mostly used in supersonic wind tunnels. Nozzles with different Mach numbers correspond to different inner wall profiles. Generally, a supersonic wind tunnel is equipped with 6 to 10 nozzles. [0003] In order to obtain the experimental data of the model at different Mach numbers, the wind tunnel test realizes the tr...

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Problems solved by technology

[0006] The invention provides a turntable device for a wind tunnel nozzle, which solves the shortcomings of too few support points of the turntable, serious wear of rolling elements, and excessive load change of the driving device in the past, and has the advantages of strong bearing capacity, convenient installation, small rolling resistance and good positioning High precision, low maintenance cost, reliable driving device, etc., due to the adoption of the central axis positioning scheme, and the addition of deep groove ball bearings and three-row roller slewing ring bearings as rotary components, it does not affect the original turntable. foundation, so the turntable cover is positioned accurately, easy to install and disassemble, and has strong practicability

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