skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Air-bearing LVDT transducer (nd) (Engineering Materials). [Linear variable differential transformer (LVDT) transducer, 4 drawings]

Abstract

The design of a cartridge-type LVDT (linear variable differential transformer), using a hydrostatic air bearing, is presented. Typically, standard LVDT transducers have a short life; due, mainly, to sticking, which renders the gage head useless. Another characteristic of the standard LVDT is a gaging force of 20 to 30 grams which is sufficient to damage parts made of soft metals such as aluminum or copper. The use of an air bearing permits a gage head movement which is smooth and free of sticking, and an adjustable air-bleed screw permits the gaging force to be varied from 2 to 10 grams. Vacuum assist can be added to permit gaging from either direction and to reduce gaging forces to as low as 0.1 gram. Although not intended to be a universal gaging head, the air-bearing gage head seems to be extremely well suited for some applications, namely: (1) in a dusty environment where the positive-displacement sealing action of the air coming from all openings can prevent dust from entering; (2) in an environment where petroleum-based lubricants are not allowed; (3) on inspection and gaging machines where the installation is semipermanent and the running of air lines is not cumbersome; (4) on gagingmore » materials which are ordinarly damaged by the gaging forces of standard LVDT transducers; and (5) at tool-setting stations for precision NC machines using diamond tools where only the lightest gaging forces are permissible.« less

Research Org.:
Oak Ridge Y-12 Plant, Tenn. (USA)
OSTI Identifier:
7185086
Report Number(s):
CAPE-2324(Rev.1)
Resource Type:
Miscellaneous
Resource Relation:
Other Information: 4 drawings
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; TRANSDUCERS; DESIGN; GAS BEARINGS; AIR; GASKETS; MACHINE PARTS; SHAFTS; BEARINGS; FLUIDS; GASES; SEALS; 420800* - Engineering- Electronic Circuits & Devices- (-1989)

Citation Formats

. Air-bearing LVDT transducer (nd) (Engineering Materials). [Linear variable differential transformer (LVDT) transducer, 4 drawings]. United States: N. p., Web.
. Air-bearing LVDT transducer (nd) (Engineering Materials). [Linear variable differential transformer (LVDT) transducer, 4 drawings]. United States.
. . "Air-bearing LVDT transducer (nd) (Engineering Materials). [Linear variable differential transformer (LVDT) transducer, 4 drawings]". United States.
@article{osti_7185086,
title = {Air-bearing LVDT transducer (nd) (Engineering Materials). [Linear variable differential transformer (LVDT) transducer, 4 drawings]},
author = {},
abstractNote = {The design of a cartridge-type LVDT (linear variable differential transformer), using a hydrostatic air bearing, is presented. Typically, standard LVDT transducers have a short life; due, mainly, to sticking, which renders the gage head useless. Another characteristic of the standard LVDT is a gaging force of 20 to 30 grams which is sufficient to damage parts made of soft metals such as aluminum or copper. The use of an air bearing permits a gage head movement which is smooth and free of sticking, and an adjustable air-bleed screw permits the gaging force to be varied from 2 to 10 grams. Vacuum assist can be added to permit gaging from either direction and to reduce gaging forces to as low as 0.1 gram. Although not intended to be a universal gaging head, the air-bearing gage head seems to be extremely well suited for some applications, namely: (1) in a dusty environment where the positive-displacement sealing action of the air coming from all openings can prevent dust from entering; (2) in an environment where petroleum-based lubricants are not allowed; (3) on inspection and gaging machines where the installation is semipermanent and the running of air lines is not cumbersome; (4) on gaging materials which are ordinarly damaged by the gaging forces of standard LVDT transducers; and (5) at tool-setting stations for precision NC machines using diamond tools where only the lightest gaging forces are permissible.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {},
month = {}
}

Miscellaneous:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item.

Save / Share: