Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF2 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F16C3/06
Inventor 林尧武张青雷
Owner SHANGHAI ELECTRICGROUP CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com