In the illustrated embodiment, the gas turbine engine 125 may be a Vericor Model TF50F bi-fuel turbine; however, the DDU 123 may include other gas turbines or suitable drive units, systems, and/or mechanisms suitable for use as a hydraulic fracturing pump drive without departing from the disclosure. In one embodiment, the fluid pumping system 113 may include a turbine engine that uses diesel or other fuel as a power source. The gas turbine engine 125 is cantilever mounted to the gearbox 127, with the gearbox 127 supported by the floor of the enclosure assembly 121.

It should also be noted that, while the disclosure primarily describes the systems and mechanisms for use with DDUs 123 to operate fracturing pumping units 111, the disclosed systems and mechanisms may also be directed to other equipment within the well stimulation industry such as, for example, blenders, cementing units, power generators and related equipment, without departing from the scope of the disclosure.

FIGS. 2 and 4 illustrate an enclosure assembly 121 that houses the DDU 123 according to an exemplary embodiment of the disclosure. As shown, the enclosure assembly 121 includes an enclosure body 165 that may extend at least partially around an enclosure space 122 to house one or more portion of the DDU 123 therein. The enclosure space 122 may also be sized and configured to accommodate other DDU/engine equipment, for example, a driveshaft interface, fuel trains, an exhaust system flanged connection, a fire suppression system, bulkheads, exhaust ducting, engine air intake ducting, hydraulic/pneumatic bulkhead hoses, inspection doors/hatches, or other components and equipment as will be understood by those skilled in the art.