Novel fastening structure for through belt of low-speed diesel engine

Abstract

The invention discloses a novel fastening structure for a through belt of a low-speed diesel engine. The novel fastening structure penetrates through and is in fastening connection to a machine base,a rack and a gas cylinder body, and comprises the through bolt, a positioning sleeve, a positioning screw, a positioning block, a hydraulic nut and a positioning nut, wherein an upper fixed through hole and a middle fixed through hole are formed in the gas cylinder body; a through hole is formed in the rack; the machine base is equipped with a lower fixed through hole and a transverse mounting hole; the transverse mounting hole and the lower fixed through hole define inverted-T-shaped penetration; the upper fixed through hole is embedded into the positioning block, the positioning nut is arranged in the transverse mounting hole, the through bolt and the positioning sleeve which are integrally welded pass through the positioning block, the middle fixed through hole, the through hole and thelower fixed through hole; the positioning sleeve is in matched positioning with the lower fixed through hole; the positioning screw jacks the positioning sleeve; the hydraulic nut and the positioningnut are separately connected to the upper end and the lower end of the through bolt; and a hydraulic elongator is used for fastening the hydraulic nut, the positioning nut and a through bolt pump forconnecting the machine base, the rack and the gas cylinder based in a fastening mode. The novel fastening structure is simple, is good in performance, is high in reliability, is convenient in mounting and dismounting, and avoids the risk that machine base scrap is caused by damages on a threaded hole.

Description

technical field [0001] The invention relates to a main engine structure of a marine diesel engine, in particular to a novel fastening structure for a through bolt of a low-speed diesel engine, and belongs to the technical field of diesel engines. Background technique [0002] After the through bolts of the marine low-speed diesel engine are pumped tightly through the hydraulic tensioner, the machine base, frame and cylinder block are tightly connected together to form a whole. As an important part connecting the machine base, frame and cylinder block, the through bolt has high strength, toughness and good stability. [0003] Existing through-bolt fastening methods such as figure 1 As shown, the bottom end thread of the through bolt 01 is screwed into the threaded hole of the machine base A, the middle section of the through bolt 01 is positioned with the hole on the frame B with the positioning sleeve 02, and the upper end thread of the through bolt 01 is aligned with the c...

AI Technical Summary

Problems solved by technology

In the actual production process, the threaded holes on the machine base A often have defects such as thread rot, thread scratches, and roughening, which put forward quite high requirements for its manufacturing accuracy and processing quality. Great inconvenience due to rework due to damage to through bolt 1 or machine base A threaded hole

Images