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Marine main engine fixing method accurate in positioning and firm in locking

A technology of ship main engine and fixing method, applied in ships, metal processing, metal processing equipment and other directions, can solve the problems of main engine displacement, difficult installation, poor reliability, etc., and achieve the effect of improving service life, easy operation, and good positioning reliability.

Inactive Publication Date: 2020-05-22
江门市新会区顺业电镀有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The installation of the ship’s main engine is to position the main engine, use a magnetic bench drill to drill the main engine foot, pad and main base at the same time and then ream, and process the reamed bolts according to the size of the reamed hole. According to the existing technology, the traditional The matching method is a transition fit, and the bolts are hammered in with a hammer during installation. The disadvantage is that it is difficult to install and the reliability of positioning is poor.
Therefore, the displacement of the main engine will be caused during use, which will bring a lot of inconvenience to the ships running normally.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A method for fixing the main engine of a ship with accurate positioning and fastening. 1) After the main engine of the ship is positioned, a magnetic bench drill is used to simultaneously drill holes on the main engine foot, pads and the main engine base on the main engine, and then ream the holes; 2 ) Bolt processing: According to the size of the reamed hole, the bolt outer diameter and thread are processed, wherein the bolt outer diameter is 0.018mm larger than the hole diameter of the main machine foot, main base, and pad after reaming; 3) The bolt is frozen, The freezing temperature is minus 32 degrees, and the general freezing time is 0.5 hours; 4) Take out the frozen bolts, and immediately put them into the machine feet and the main machine.

Embodiment 2

[0012] A method for fixing the main engine of a ship with accurate positioning and fastening. 1) After the main engine of the ship is positioned, a magnetic bench drill is used to simultaneously drill holes on the main engine foot, pads and the main engine base on the main engine, and then ream the holes; 2 ) Bolt processing: according to the size of the reamed hole, the outer diameter and thread of the bolt are processed, and the outer diameter of the bolt is 0.02mm larger than the hole diameter of the main machine foot, the main base, and the pad after reaming; 3) The bolt is frozen, The freezing temperature is minus 33 degrees, and the general freezing time is 1 hour; 4) Take out the frozen bolts and put them into the main machine feet and main machine immediately.

Embodiment 3

[0014] A method for fixing the main engine of a ship with accurate positioning and fastening. 1) After the main engine of the ship is positioned, a magnetic bench drill is used to simultaneously drill holes on the main engine foot, pads and the main engine base on the main engine, and then ream the holes; 2 ) Bolt processing: According to the size of the reamed hole, the bolt outer diameter and thread are processed, wherein the bolt outer diameter is 0.025mm larger than the hole diameter of the main machine foot, main base, and pad after reaming; 3) The bolt is frozen, The freezing temperature is minus 35 degrees, and the general freezing time is 1.5 hours; 4) Take out the frozen bolts, and immediately put them into the machine feet and the main machine.

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PUM

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Abstract

The invention discloses a marine main engine fixing method accurate in positioning and firm in locking, which comprises the following steps: (1) after a marine main engine is positioned, drilling mainengine legs, a cushion block and a main engine base on a main engine at the same time on site by using a magnetic base bench drill, and then carrying out reaming; (2) machining bolts, namely, machining the outer diameters and threads of the bolts according to the size after reaming, wherein the outer diameters of the bolts are 0.018-0.025mm larger than the diameters of the reamed holes of the main engine legs, the main machine base and the cushion block; (3) freezing the bolts at the freezing temperature from minus 32 DEG C to minus 35 DEG C for 0.5h to 1.5h generally; and (4) taking out thefrozen bolts, and immediately placing the frozen bolts into the main engine legs and the main engine. The invention provides the marine main engine fixing method accurate in positioning and firm in locking, which is convenient in installation and good in positioning reliability.

Description

technical field [0001] The invention relates to the field of ship machinery installation in shipbuilding or ship repair, in particular to a fixing method for a ship main engine with accurate positioning and firm locking. Background technique [0002] The installation of the main engine of the ship is to position the main engine, use a magnetic bench drill to drill the main engine foot, pad and main base at the same time and then ream the hole, and process the reamed bolts according to the size of the reamed hole. According to the existing technology, the traditional The best fit method is a transition fit. When installing, the bolts are hammered in with a hammer. The disadvantage is that the installation is difficult and the reliability of positioning is poor. Therefore, the displacement of the main engine will be caused during use, which will bring a lot of inconvenience to ships running normally. Contents of the invention [0003] The technical problem to be solved by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B73/20B23P11/02
CPCB23P11/025
Inventor 胡顺昌
Owner 江门市新会区顺业电镀有限公司