| 摘要 |
705,571. Tubular heat exchangers. STANDARD-THOMSON CORPORATION. May 2, 1950. [May 18, 1949], No. 10778/50. Class 64(3) Relates to heat-exchangers particularly for heat-exchange between lubricating oil and fuel in turbo-jet aircraft, having a shell made in sections (e.g. 14, 16, 18) with internal walls dividing each section into a plurality of connected cells each containing a bundle of tubes 6, Fig. 3, through which a fluid is directed to exchange heat with another fluid flowing through the shell and over the tubes. According to the invention each shell section is provided with flanges 19 whereby adjacent sections may be welded together with their cells. in parallel alignment. Preferably each bundle of tubes extends between tube plates 24 and is provided with baffles 28 to guide a fluid to cooled (e.g. lubricating oil) in a sinuous path over the tubes from an inlet 34 to an outlet 35 by way of ports 33 interconnecting adjacent cells. Fuel to be heated flows from an inlet 40, through each tube bundle in series or as shown through a series of parallel pairs of tube bundles to an outlet 42. The cells are closed at theid ends by individual caps 44 or .alternatively by end closure plates common to all cells. The arcuate arrangement of Fig. 1 is preferably used when the heat exchanger surrounds the jet engine or other equipment. When used for cooling oil the usual thermostatic flow control valve 45 is provided whereby oil by-passes the heat exchanger when its temperature falls below a predetermined value.
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