Crank pin angle control method for machining crankshaft sleeve of low-speed diesel engine for large-scale ship

An angle control and crank pin technology, applied in the direction of the crankshaft, etc., can solve the problems of affecting the accuracy of the angle control, the sliding displacement of the device, and being difficult to adjust.

Active Publication Date: 2011-04-20
SHANGHAI ELECTRICGROUP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although this device reduces labor when inserting, due to the limitation of the mechanical properties of the device itself and the deformation of the crank throw when the red sleeve is heated, the device often suffers from sliding displacement, which affects the accuracy of angle control and is not easy to adjust

Method used

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  • Crank pin angle control method for machining crankshaft sleeve of low-speed diesel engine for large-scale ship
  • Crank pin angle control method for machining crankshaft sleeve of low-speed diesel engine for large-scale ship
  • Crank pin angle control method for machining crankshaft sleeve of low-speed diesel engine for large-scale ship

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Experimental program
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Embodiment Construction

[0013] Such as figure 1 As shown, the present invention, that is, the crank pin angle control method in the processing of the crankshaft red sleeve of a large marine low-speed diesel engine, after the single set of crank throws is completed, the center of each single set of crank throw crank pins 1 is marked, and the crank arm red sleeve hole 2 The center of the main journal 3 and the center connection line and the crank phase angle positioning line of the set main journal 3.

[0014] When drawing the center line, place the outer circle of the crank pin 1 on the pad iron 4 for marking the crank throw, with both sides facing down, and place two oil pump adjustment jacks 5 . The main journal that has been red-sleeved is well cushioned with wooden blocks or flat-top jacks at the outer circle of the non-red-sleeved end, and it is basically placed horizontally. Use the micrometer scale to mark the dial 6 and use the crank pin 1 diameter equal height block to flip up and down sever...

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Abstract

The invention relates to a method for controlling the angle of crank pin, when machining the crank sleeve of low-speed diesel engine of large ship. Wherein, it is characterized in that: when completing the crank single sleeve, finding the connecting line between the centers of crank pin, red sleeve hole and the sheathed main axle neck of each single crank and the phase angle positioning line of crank; when sheathing again, aligning the upper dead point central line and the lower dead point central line with the upper and lower phase angle positioning lines respectively, while the error is limited in 10'. The invention can avoid slide displacement caused by the deformation of crank and the limit of mechanical property, to avoid affecting the angle control, improve the angle positioning accuracy of crank pin angle and confirm the positioning quality, to reduce the heating time and temperature, and obtain minimum deformation of red sheath.

Description

technical field [0001] The invention relates to a crank pin angle control method in the processing of a crankshaft red sleeve of a large marine low-speed diesel engine. Background technique [0002] The sequence of crankshaft red sleeves for large marine low-speed diesel engines is to firstly form a single set of a pair of crankshafts and main journals into a combination, and then start from the output end of the crankshaft and then cover them section by section. In order to ensure that the overall crankshaft is processed and the maximum deformation of the overall crankshaft after the red sleeve is not more than 2.5mm, the angle error of the crankpin of each cylinder must be within 1 / 4 degree. [0003] In the existing red sleeve processing, a set of crank angle positioning pins and angle positioning seat devices are used to install and fix the adjusted positioning pins and positioning seats on the two crank throws respectively, and the angle can be directly positioned when i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C3/06
Inventor 林尧武张青雷
Owner SHANGHAI ELECTRICGROUP CORP
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