Partition mechanism for multi-interface test platform of helium turboexpander

Abstract

The invention discloses a partition mechanism for a multi-interface test platform of a helium turboexpander. Connecting rod, the inner sealing gasket is interference fit in the bottom counterbore of the sealing connecting rod; the sealing connecting rod is put into the cold end part and the inner sealing gasket is tightly pressed against the exhaust port in the cold end part; The lower part of the rod is equipped with heat-insulating tetrafluoroethylene pressed into the cold end part, the upper part of the sealing connecting rod is screwed with a sealing cover installed on the mounting flange, and the upper part of the sealing cover is press-fitted with a sleeve on the sealing connecting rod The outer sealing gasket is used, and the sealing nut is spun on the outer side of the sealing cover on the sealing connecting rod. The invention enables a helium turboexpander test platform to have several interfaces at the same time, satisfying the test of different types of helium turboexpanders, ensuring that when one interface is in use, other interfaces are not interfered, and no leakage is guaranteed, greatly expanding the helium Practicality and efficiency of turboexpander test platform.

Description

technical field [0001] The invention relates to the field of turbo expanders, the field of gas bearings, and the field of low temperature testing, especially in the field of low temperature applications of static pressure gas bearing helium turbo expanders, and specifically relates to a new type of partition for multi-interface test platforms of helium turbo expanders . Background technique [0002] In large-scale helium cryogenic systems and other large-scale low-temperature systems, the helium turboexpander is the core component (the only source of cooling capacity). Before the helium turboexpander is installed and applied to the helium refrigerator, it must be tested and verified at low temperature. Its mechanical properties and low-temperature thermodynamic properties, because the helium turbo expander may have certain defects in design, processing, assembly, rotor dynamic balance, bearing system, etc., it is very necessary to test the mechanical properties of the helium...

AI Technical Summary

Problems solved by technology

Therefore, the same installation interface cannot meet the test requirements of all helium turboexpanders (the diameter of the centerline of the installation threaded hole Dout is the same as the inner hole Din of the cryogenic component, that is, it cannot meet the installation requirements of all helium turboexpanders) , and one test platform can only test several types of helium turboexpanders (because the dimensions of helium turboexpanders vary with different helium turboexpanders), which is obviously unreasonable, which is Multiple interfaces are required. When there are multiple interfaces, each interface needs to be partitioned to ensure that when one interface is in use, the other interfaces are isolated and do not interfere with each other.

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