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Improved monitoring equipment and method for bearing wear in large two-stroke diesel engines

A diesel engine and engine technology, applied in the direction of mechanical bearing testing, mechanical equipment, engine components, etc., can solve problems such as large generation errors and complex inspections

Active Publication Date: 2014-10-15
曼能解决方案(曼能解决方案德国股份公司)分公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] These inspections are quite complex and require the bearing to be dismantled and then reinstalled
This process involves a great risk of build error (bulid error), which is the error caused during the overhaul process

Method used

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  • Improved monitoring equipment and method for bearing wear in large two-stroke diesel engines
  • Improved monitoring equipment and method for bearing wear in large two-stroke diesel engines
  • Improved monitoring equipment and method for bearing wear in large two-stroke diesel engines

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Embodiment Construction

[0048] In the following detailed description, the device, method, and software product according to the teachings of the present application will be described through embodiments related to a large two-stroke diesel engine. It should be noted that although only two-stroke engines are described, the teachings of this application can also be applied to any engine, such as four-stroke engines, two-stroke gasoline engines, and small two-stroke diesel engines.

[0049] figure 1 It is a cross-sectional view of engine 100. The engine has a crankshaft with a main journal 110 and one or more crank pins 120, wherein each crank pin 120 is connected with a crosshead 130.

[0050] Each cylinder has at least three bearings, the main bearing 140 ( figure 1 Not visible in the dotted line), crank pin bearing 150 and crosshead bearing 160.

[0051] Each cylinder is provided with two sensors 170 (only one is shown). In one embodiment, one sensor 170 is provided at the rear of the crosshead 130, and o...

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Abstract

An apparatus for monitoring wear of crosshead bearings, crankpin bearings and main bearings in a large two-stroke diesel engine, said apparatus comprising at least two sensors, wherein said sensors are arranged and configured for measuring wear in a given cylinder A bottom dead center level associated with a fixed point of the engine, wherein the apparatus further includes a controller configured to: receive a signal from each sensor; compensate each signal based on an operating condition of the engine; determine whether a threshold is exceeded, and if so, issuing an indication that a threshold has been exceeded, and wherein the controller is further configured to generate an engine operating condition compensation table by sampling a first number of sensor values ​​during a learning phase during operation of the engine, the first number of sensor values ​​being correlated with the The reference value is determined by averaging the received speed point samples after the first number of samples of the engine operating conditions have been received.

Description

Technical field [0001] The invention relates to a device and method for measuring bearing wear in a large two-stroke diesel engine. Background technique [0002] The main bearing, crank pin bearing, and crosshead bearing of a large two-stroke diesel engine have a bottom bearing shell and a top bearing shell that define a bearing surface for supporting the corresponding bearing journal. The bearing housing has a steel backing with a layer of bearing metal on the steel backing. The bearing metal is usually a layer of tin-aluminum alloy or white alloy with a thickness of approximately 1.5 to 2 mm. [0003] Although these engines are produced and operated very carefully, they still have a small failure rate. Since most large two-stroke diesel engines are engines for ocean-going ships, it is extremely undesirable that engine failures caused by faulty bearings occur. [0004] Moreover, the cost of bearing overhaul may be a major issue, such as the need to re-grind the crankshaft, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/04
CPCF02B77/083G01M13/04G01M15/06F16C17/246F02B2075/025
Inventor 亨里克·维拉登斯·克里斯滕森马丁·奥尔森
Owner 曼能解决方案(曼能解决方案德国股份公司)分公司