Hans Jensen Lubricators A/S - 100 years

LCD Regulation with Priming

Background

The cylinder condition is improved by applying a thin oil film on the cylinders of the engine, in connection with starting the engine and this is called priming. 
Similarly, an extra lubrication is usually added during load changes, e.g. during manoeuvring.
 
Hans Jensen Lubricators A/S has developed a LCD regulation with priming, which both pre-prime and ensures that sufficient lube oil is given automatically when the engine is exposed to load changes.
 
This means, that the crew does not have to perform manual adjustments during these conditions.

Functionality

The LCD system receives signals from a governor or a control box connected to the fuel regulation shaft.
 
When load changes occur, e.g. during manoeuvring, these are registered by the LCD system which then provides extra lubrication.

Flexibility

LCD regulation with priming is identical with the traditional model 2CC.
LCD-actuator in terms of design and can be mounted on new installations as well as already installed HJ Lubricators with zero settings. The 3CC LCD-actuator is dimensioned for priming 10 lube points at one time with HJ SIP valves.
Lubricating with non-return valves places no constraints in this case.
 
Please feel free to contact us for further information on LCD regulation with priming.
 
Read more about HJ Lubricators. Click here
 
Read more about HJ SIP Valves. Click here

 

Purpose

The cylinder condition is improved by applying a thin oil film on the cylinders of the engine in connection with starting the engine and this is called priming. Similarly, an extra lubrication is usually added during load changes, e.g. during manoeuvring.
 
Hans Jensen Lubricators A/S has developed a LCD regulation with priming, which both pre-prime and ensures that sufficient lube oil is given when the engine is exposed to load changes. This means, that the crew does not have to perform manual adjustments during these conditions.
 
Furthermore, the LCD handle can be used for common joint quantity regulation if there is a need for increasing the oil inlet on all outflows manually.

System description

Load changes are reflected in the position of the fuel regulation shaft. The pick-up of the LCD system detects such changes through the pressure rod and passes this information on to the control box as an electrical signal. Alternatively, the signal can be sent directly from the bridge control.
 
If the change in the position of the fuel shaft is smaller than the preset value, no extra lubrication is made.
 
The reference is an adjustable parameter and can be adjusted in accordance with the set values for the concerned lubricator/vessel.
 
If the change in the position is larger than the preset value, the lubrication is increased by the control box which switches on the power to the magnet valve thus changing the air pressure to the actuator.
 
The air pressure inside the actuator turns an eccentrical axel inside the lubricator, which increases the stroke length of all piston pumps inside the lubricator.

Operation of the LCD actuator

The increase of lube oil is adjusted with the two handles of the LCD actuator. The first handle states the minimum stroke length increase and will always be added to the basis stroke length of the lubricator, independent of load changes.
 
The other handle states the maximum stroke length increase requested during load changes.
 
Please feel free to contact us for further information on LCD regulation with priming.
The actuator should be dismounted every 5 years and lubricated with:
Aeroshell Grease 7
Mil-G 23827B or similar product
Code 70149

The drawings no. 805154 and/or no. 805155 in the LCD appendix in the manual must be scrutinised carefully before dismounting. At remounting it must be ensured that the shaft (pos. 6 on drawing no. 805154 and/or no. 805155) is placed in the same position as before it was dismounted. Do not try to dismount the piston (pos. 6 on drawing no. 805154 and/or no. 805155), as special tools are required to remount it again.

Please feel free to contact us for further information on maintenance of LCD regulation with priming.

On this page you can find replies to a number of frequently asked questions on LCD regulation with priming. If you find the replies incomplete, you are welcome to contact us with a description of your question or problem. We shall then try to help you best possible.
  • What is the difference between LCD regulation and LCD regulation with priming?
    • LCD regulation with priming is an extension of the LCD regulation, designed with the purpose of pre-priming the engine before start.

      LCD regulation with priming is an enhanced version of the LCD regulation dimensioned structurally to handle up to 10 HJ SIP valves at one time.

  • What is the difference between MEP regulation and LCD regulation with priming?
    • MEP regulation is a way to save lube oil while maintaining a safe operational condition during part load. On all engines with timed lubrication an excess of lube oil is used in part load areas. This occurs due to the fact that the engine has a rpm dependent injection and the lube oil consumption is specified as a function: g/BHPh of the engine’s load.

      If you operate in part load areas, the MEP regulation may help to adjust the lube oil consumption to the actual need.

      However, the LCD regulation with priming is an automatic joint quantity adjustment increasing the lube oil injection in case of changes in the manoeuvring and loads. This means that the cylinder liner is protected by adding a higher feed rate in short periods when it is needed.

  • Can MEP regulation and LCD regulation with priming be applied together?
    • Yes, MEP regulation and LCD regulation with priming can be used together with great advantage. They serve in their own way to achieve an optimum cylinder lubrication of the engine.

  • The lube oil consumption is too high in rough sea. What can I do?
    • The LCD actuator of the lubricator functions based on signals which it receives either from a governor or a control box connected to the fuel regulation shaft. At delivery, the signal is set according to the engine designer’s guidelines.

      However, some engines operate under conditions which are different from the average used as basis for the calculation of these guidelines. Therefore, there is also the opportunity that you may adjust the settings of the system yourself. We recommend that you consult the relevant material for the control which is used on your engine. In this way, you may perform an adjustment which meets your need for when an increased lubrication is needed.

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