Uses and Applications of Kemel Propeller NutBlog | July 11th, 2018
Before this post dives into yet another innovative design principle, a cautionary note should be issued. Marine engineers, masters of all things mechanical, they know that hydraulic systems use dangerous pressures. For that reason, high-pressure hydraulic systems must be worked upon with all due care. Having opened with this reproach, we’ve gotten ahead of ourselves. After all, we haven’t even explained the “nut’s” functions yet.
What Are Kemel Propeller Nuts?
From the very beginning, the focus of this article is being pushed towards a particular manufacturer. And rightly so, for Kemel has developed the “K nut,” a high-pressure propeller nut that employs oil as its fluid drive medium. That pressure is applied as a finitely controllable force, which would be next to impossible if the work was being done with a mechanically-based set of tools. It wouldn’t work, which is why Kemel propeller nuts are used on many larger propulsion systems. Designed to precisely accept high quantities of torque, to mate and lock against large shafts, the circular rings are industry standard fittings.
Propeller Nuts: The Specifics
Specifically, Kemel propeller nuts are built to “push up” a fitted propulsion forging after it has been installed. Think of the tapered screw rod down there below the hull. Heat and kinetic energy have pushed the propeller forward until it locked in place. When a hydraulic propeller nut is used instead of standard marine withdrawal tools, perhaps on a drydock, then the dismounting process concludes without any effort. As for the physical design, a look at the ring should be enough to highlight its advantages. It is compact, made of hardened, heat treated steel, and dotted with intelligently placed apertures. Thanks to that innovative design, a powerful oil pump can begin the withdrawal procedure in tight spaces because there’s no need for additional mechanical tools.
Fluid-Based Withdrawal Applications
Anywhere there’s a tapered shaft and an accompanying mechanical fitting, propeller nut withdrawal systems are likely nearby. They operate in power stations as turbofan removal tools, in the aeronautics industry as turboprop servicing aids, and in heavy industrial usage domains as shaft-to-rotor disengaging helpers. Where there are narrowing drive rods and heat-pressed propellers, there lays the potential for a pressure-actuated Kemel propeller nut, a tool that uses oil as its torque delivery medium.
When a marine engineer uses a standard set of withdrawal tools, the work runs the risk of causing shaft fretting. At any rate, those tools begin to lose out when that propeller grows in diameter. By employing a Kemel propeller nut, the removal procedure proceeds cleanly and effortlessly, even when the drive forging is situated within a very restricted work area.
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