US 6,149,074 AGranted

Device for cooling or heating a circular housing

AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."

InventorsJerome Friedel, Patrick Didier Michel Lestoille, Christophe Schultz, Jean-Luc Soupizon, Jean Bernard Vache

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Abstract

The housing is heated or cooled to adjust its diameter and, in particular, the play between the tips of the rotor blades and the housing. The apparatus consists of networks of tubes (1) covering complementary portions of the circumference of the housing and consisting of a pair of distributors (3) and parallel tubes (2) between said distributors, said tubes (2) being alternately connected to one or other of the distributors and provided with apertures to blow the gas onto the housing. The counter-flow circulation in the tubes (2) makes it possible to supply both gas that has been greatly heated by traveling a considerable distance through the tubes (2) and cooler gas that has traveled less far in other tubes (2) to any point on the housing, thereby balancing out the heat applied to every portion of the housing.

Claims4

Dependent claims

A Cooling or heating apparatus for a circular housing, comprising:

networks of tubes covering different sections of a circumference of the housing, the tubes having gas outlet apertures directed to the housing;
gas inlet distributors each of which has a bush and is provided at an end of each of the networks so that each of the networks is provided between and connected to two of the gas inlet distributors;
gas supplying pipes each of which is configured to supply gas to two adjacent of the gas inlet distributors;
sleeves each of which is inserted into the bushes of the two adjacent of the gas inlet distributors to connect one of the gas inlet distributors of one of the networks and one of the gas inlet distributors of another one of the networks such that the networks are connected to each other by the sleeves, each of the sleeves being slidable in the bushes and having ends each of which has a shape of a portion of an open sphere, the bushes having an end-stop to limit a movement of the sleeve;
and
connecting pipes each of which is provided in each of the sleeves to pass through the end-stop of one of the bushes to open into each of the gas supplying pipes such that a cross-sectional area of each of the connecting pipes overlaps a half of a cross-sectional area of each of the gas supplying pipes.

3 more elements

Dependencies are inferred from the claim text.