Tightening method for marine main engine foundation bolt

Abstract

The invention discloses a tightening method for a marine main engine foundation bolt. The tightening method comprises the following steps: step one, arranging an epoxy gasket between a main engine body and a main engine base; step two, enabling the foundation bolt to penetrate through the main engine body, the epoxy gasket and the main engine base, and installing a foundation nut; step three, installing a conversion rod on the foundation bolt and the foundation nut in a clamped mode, and adjusting the length of an adjustable support so that the adjustable support can abut against the main engine body; and step four, installing a torque wrench, connecting the torque wrench with a first tightening hole or a second tightening hole, and tightening the foundation bolt through the torque wrench. The operation process is simple, convenient, safe and reliable; Only a sleeve of an original torque wrench needs to be replaced by the specially-made conversion rod, any accessories cannot be damaged, and the torque wrench is easy to dismantle and restore.

Description

technical field [0001] The invention belongs to the technical field of ship building, and in particular relates to a method for tightening anchor bolts of a ship main engine. Background technique [0002] For ships under construction at present, there are generally two methods to be adopted when tightening the anchor bolts for inspection during the main engine installation stage: 1. Use a torque wrench to tighten, because the sleeve used by the torque wrench often needs to be tightened according to the bottom The length of the foot bolt is used to select the extension sleeve, which cannot be used in the case of a small space above the foot bolt, and the handle of the torque wrench is long, so the periphery of the foot bolt needs to be sufficiently open; 2. Use a hydraulic tensioner to tighten, this method Using a hydraulic pump is easy to operate, and there is no handle. Compared with the torque wrench, the requirements for the peripheral space of the foot bolts are lower. H...

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Problems solved by technology

[0002] For ships under construction at present, there are generally two methods to be adopted when tightening the anchor bolts for inspection during the main engine installation stage: 1. Use a torque wrench to tighten, because the sleeve used by the torque wrench often needs to be tightened according to the bottom The length of the foot bolt is used to select the extension sleeve, which cannot be used in the case of a small space above the foot bolt, and the handle of the torque wrench is long, so the periphery of the foot bolt needs to be sufficiently open; 2. Use a hydraulic tensioner to tighten, this method Using a hydraulic pump, it is easy to operate, and there is no handle. Compared with the torque wrench, the requirements for the peripheral space of the foot bolts are lower. However, the size of the hydraulic tightening parts is large, and there are certain requirements for the space around the foot bolts.

[0003] As the space density of the current ship engine room layout design is getting higher and higher, the structure of the main engine itself is becoming more and more compact, so that the space around the anchor bolts of the main engine is continuously compressed. hydraulic tensioner, there is not enough installation space

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