CLU-4 Pulse Jet Lubrication - HMS TRAINING …hmstc.or.kr/file/BBS1/78_RT-flex_CLU-4 cylinder... ·...

© Wärtsilä Land & Sea Academy Chapter 78 12-Jul-11

CLU-4 Pulse Jet Lubrication

RT-flex Training

Function of the CLU-4 Pulse Cylinder Lubrication System

Chapter 78


CLU-4 Pulse Jet LubricationCLU 4 Pulse Lubricating System Type

1. Pulse Jet- Cylinder oil injection to the liner wall side

2. Pulse Feed- Cylinder oil injection to the piston ring package andskirt.


CLU-4 Pulse Jet Lubrication Description

The CLU-4 Pulse Jet Cylinder Lubrication System is based on a lubrication module with integrated electronics and newly developed lubricators.

During operation, oil flows from the daily service tank to the lubricating oil filter and then to the dosage pump in the pulse lubrication module. Each of the cylinders is equipped with one pulse lubricating module and eight lubricators.

The position of the working piston is continuously monitored by the crank angle sensor that is connected to the control system. At defined positions of the working piston, the dosage pump sends the oil to the lubricators where it is discharged.

The dosage pump in the pulse lubrication module is driven by the servo oil. This is a separate oil line that runs in a closed circuit. The servo oil is taken from the servo oil common rail through a pressure reducing valve.

CLU 4 Pulse Lubricating System Description


CLU-4 Pulse Jet Lubrication Description

Cylinder oil distribution is different between Pulse jet and Pulse Feed as bellows.1) Pulse JetThe lubricators deliver the lubricating oil as pulse jet feeding into the liner wall. From there, the lubricating oil is distributed around the circumference of the cylinder liner. The vertical oil distribution is determined by the injection timing. It is adjusted by means of the control system.2) Pulse FeedThe lubricators deliver the lubricating oil as compact pulse feed exactly into the piston ring package 80% and the piston skirt 20%. From there, the lubricating oil is distributed around the circumference of the cylinder liner.

The feed rate is adjusted by skipping more or less un- lubricated strokes. The injection is initiated on up-strokes only.

CLU 4 Pulse Lubricating System Description


CLU-4 Pulse Jet Lubrication Components

The CLU-4 pulse lubrication system consists of the following components:

Lubricating oil filter with measuring system

Pulse lubricating module (dosage pump with an electronically controlled timing device)

Lubricators (eight lubricators in a row)

Control system

Crack angle sensors (RTA only)

Servo oil supply unit (RTA only)

Servo oil pressure reducing unit (RT-flex only)

CLU 4 Pulse Lubricating System Components


CLU-4 Pulse Jet Lubrication Oil Distribution

- Pulse Jet

The vertical distribution is governed by the injection timing as a function of the crank angle.The cylinder lubricating oil can be injected into the cylinder above, into or below the piston.The timing is weighted in order to optimise the distribution characteristics.

CLU 4 Pulse Lubricating System Injection Timing


CLU-4 Pulse Jet Lubrication Timing

- Pulse Feed

Lube oil distribution into piston ring package to lubricate piston rings

and upper part of liner

Lube oil distribution to piston skirt to

lubricate lower part of liner

CLU 4 Pulse Lubricating System Injection Timing


CLU-4 Pulse Jet Lubrication Arrangement

Pulse jet – Injection into the liner wall side

CLU 4 Pulse Lubricating System Arrangement


CLU-4 Pulse Jet Lubrication Arrangement

- Pulse feed – Injection to the ring package and skirts

CLU 4 Pulse Lubricating System Arrangement


CLU-4 Pulse Jet Lubrication SchematicCLU 4 Pulse Lubricating System Schematic


CLU-4 Pulse Jet Lubrication Schematic

Description:Electronically controlled timing with full flexibility of timing pointElectronically controlled feed rateOil distribution by piston ringsPrecise dosage even for low feed ratesReliable oil quills (simple non-return valves)Control of lubricating system fully integrated in RT-flex control system WECS-9520

CLU 4 Pulse Lubricating System Schematic


CLU-4 Pulse Jet Lubrication Control & MonitoringCLU 4 Pulse Lubricating System Schematic


CLU-4 Pulse Jet Lubrication ALM-20CLU 4 Pulse Lubricating System ALM-20


CLU-4 Pulse Jet Lubrication Lubricating module

Lubrication oil outlet ports

Vent plug for lubrication oil

Vent plug for servo oil

Dosage pump

4/2-way solenoid valve

Diaphragm accumulator

Pressure Sensor

Shut-off valve for lubrication oil

Lubrication oil inlet (L)

To servo oil tank (T)

Relief valve for servo oil

Shut-off valve for servo oil

CLU 4 Pulse Lubricating System Lubrication Module


CLU-4 Pulse Jet Lubrication Cross SectionCLU 4 Pulse Lubricating System Cross Section


CLU-4 Pulse Jet Lubrication Cross SectionCLU 4 Pulse Lubricating System Maintenance

Note : According to SKF pump maker’s recommendation, it would be better that

the Solenoid valve and Pressure transmitter are replaced after 5 ~ 7 years.

And also it is highly recommended that the accumulator is replaced after 5 years


CLU-4 Pulse Jet Lubrication Lubricator

- Pulse Jet -

- Pulse Feed -

CLU 4 Pulse Lubricating System Lubricator


CLU-4 Pulse Jet Lubrication flexViewCLU 4 Pulse Lubricating System Flex-View

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