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Multistage motor-compressor for the compression of a fluidRelated Patent Categories: Pumps, Motor Driven, Motor Rotor Intermediate Coaxial Pump RotorsMultistage motor-compressor for the compression of a fluid description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070036662, Multistage motor-compressor for the compression of a fluid. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims benefit under 35 U.S.C. .sctn.119(a) of Italian Patent Application No. T)2005A 000558, filed Aug. 5, 2005 and European Patent Application No. 06101557.4, filed Feb. 10, 2006, the entire contents of both of which are incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This disclosure refers to a multistage motor-compressor for the compression of a fluid, for motor vehicles for example. In particular, the disclosure refers to a two-stage motor-compressor for the supply of pressurized air to fuel cell systems. [0004] 2. Description of Related Art [0005] Motor-compressors of the above-stated type are well known, in which the first-stage scroll is connected to a tangential first section of a transfer duct, while a second axial or radial section of the transfer duct is connected to a fluid conveyor for the second-stage scroll. In the case where the second section is axial, the fluid flow entering the conveyor undergoes abrupt changes of direction, giving rise to a drop in flow pressure, high operational power consumption and reduced efficiency for the motor-compressor. [0006] In the case in which the second section of the transfer duct is radial, it is normally shaped to create a helical flow with the same direction of rotation as that of the second-stage impeller. This radial connection has the drawback of reduced efficiency and a low compression ratio at high flow rates. [0007] Multistage motor-compressors are also known, in which the impellers are arranged in series on the same output side of the driving electric motor's shaft. Since the two impellers are cantilever mounted on the shaft, the latter is subject to stress, which reduces the operating speed. BRIEF SUMMARY OF THE INVENTION [0008] The object of the disclosure is that of embodying a two-stage motor-compressor, which is highly reliable, eliminating the drawbacks and increasing the performance of motor-compressors of known art. [0009] According to the disclosure, this object is achieved by a multistage motor-compressor for the compression of a fluid. [0010] According to a variant of the disclosure, the impellers of the two stages are fixed on two opposite ends of the shaft of a common driving electric motor, for which the motor-compressor is able to operate at high speeds. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS [0011] For a better understanding of the disclosure, a preferred embodiment is described herein, provided by way of example with the aid of the enclosed drawings, in which: [0012] FIG. 1 is a right-hand perspective view of a two-stage motor-compressor according to a first variant of the disclosure, [0013] FIG. 2 is a left-hand perspective view of the motor-compressor in FIG. 1, [0014] FIG. 3 is a diametrical section of the motor-compressor in FIG. 1, [0015] FIG. 4 is a view along line IV-IV in FIG. 3, [0016] FIG. 5 is a view along line V-V in FIG. 3, [0017] FIG. 6 is a left-hand perspective view of part of the motor-compressor in FIG. 1, [0018] FIG. 7 is a left-hand perspective view of another part of the motor-compressor in FIG. 1, [0019] FIG. 8 is a right-hand perspective view of a further part of the motor-compressor in FIG. 1, [0020] FIGS. 9 and 10 are two due perspective views similar to that in FIG. 2, regarding two variants of the motor-compressor, and Continue reading about Multistage motor-compressor for the compression of a fluid... Full patent description for Multistage motor-compressor for the compression of a fluid Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Multistage motor-compressor for the compression of a fluid patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Multistage motor-compressor for the compression of a fluid or other areas of interest. ### Previous Patent Application: Capacity modulated scroll compressor Next Patent Application: Traction drive having an electrical converter Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Multistage motor-compressor for the compression of a fluid patent info. IP-related news and info Results in 0.12661 seconds Other interesting Feshpatents.com categories: Electronics: Semiconductor , Audio , Illumination , Connectors , Crypto , 174 |
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