JPH0717772Y2 - Cylinder liner lubrication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an oiling device applied to a cylinder liner (hereinafter abbreviated as liner) of a low-speed large-sized diesel engine for ships.

[Conventional technology]

Fig. 4 shows the cylinder lubrication system of a conventional long-stroke marine low-speed diesel engine, where 01 is a liner, 02 is a top ring, 03 is a piston, 04 is a lubrication rod, and 05.
Is a conduit and 06 is a lubricator. The position of the lubrication rod 04 in the axial direction of the liner is usually provided above the liner 01.
06 is synchronized with the camshaft of the engine (not shown).

[Problems to be solved by the device]

However, in a long-stroke engine, especially in a derating engine, if the wear of the top ring 02 progresses with time, the ring joint becomes large and gas leakage increases. The leaked gas contains SO ₃ and soot.When this is carried near the center of the stroke of a low temperature liner, SO ₃ in the leaked gas reacts with water to form sulfuric acid and form an oil film. It becomes a cause of increase in corrosive wear. Further, carbon, soot, etc. contained in the leaked gas cause wear. Therefore, in the conventional lubrication type engine, as shown in FIG. 5, liner wear in the vicinity of the central portion of the piston stroke is significantly increased as compared with the vicinity of the upper portion.
Along with this, there is a drawback that the wear of the top ring is significantly increased, the life of the top ring is shortened, and the interval for removing the piston is shortened. It should be noted that there is a drawback in that the wear characteristics at the center of the liner do not change even if the amount of oil discharged from the oil-filling rod 04 is increased and the wear is not significantly reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cylinder liner lubrication device that solves the problems of the conventional device described above, can significantly reduce wear at the center of the liner, and can reduce the consumption of lubricating oil.

[Means for Solving the Problems]

The cylinder liner lubrication device of the present invention comprises a continuity sensor provided on the circumference near the stroke center of the liner, a plurality of lubrication rods provided on the circumference of the liner near the continuity sensor, and the lubrication rod. The motor that drives the lubricator that supplies lubricating oil to the motor and the number of times that the electrical resistance becomes zero due to the metal touch when the top ring crosses the continuity sensor unit occured continuously N times or more, which is a preset value. It is characterized by having a controller for operating the motor only for the N times.

[Action]

In the present invention, the electrical pulse is activated so that the lubrication state is improved only when the number of metal touches of the continuity sensor and the top ring provided near the stroke center of the liner is maintained at a preset value. The lubricator is driven by the motor for the same time as the number of metal touches, and the cylinder oil is supplied near the center of the liner stroke. Therefore, the amount of wear of the portion is reduced. Since the present invention only applies oil when lubrication is severe, the increase in oil consumption can be reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram of the embodiment, FIG. 2 is a partially enlarged model of FIG. 1, and FIG. 3 is a liner wear diagram.

In FIG. 1, a plurality of lubrication rods and lubrication holes are provided in the upper portion of the liner and in the vicinity of the stroke center, and a continuity sensor 11 capable of measuring electrical resistance is provided near the lubrication hole 17 near the stroke center. It is located above. As shown in FIG. 2, an insulating material 20 is attached to the continuity sensor 11,
Positive and negative electrodes 18 and 19 are provided on the same circumference, and both electrodes are connected by a circuit including a resistor 22 and a battery 23. Therefore, when both electrodes and the ring become a metal touch and a current flows through this circuit, the signal is sent to the electric pulse processor 13. The electric pulse processor is synchronized with the rotation of the engine. The motor 14 that drives the lubricator 15 is configured to supply necessary and sufficient lubricating oil to the lubrication rod 17 via the electric pulse processor 13 and the controller 25.

Next, the operation of the above embodiment will be described.

When the top ring 2 crosses the continuity sensor 11 of the liner 1 while the engine is operating, the top ring 2 and the liner 1
The resistance value changes and the electric pulse also changes depending on whether or not there is an oil film between (conduction sensor 11). When there is no oil film and a metal touch is made, the electric resistance becomes zero. Only when the cycle in which the electric resistance becomes zero continues for a preset number of times N or more, the motor 14 lubricates the motor 14 through the electric pulse processor 13 and the controller 25 for a time corresponding to the next N times. 15 is driven, an appropriate amount of oil is supplied from the lubricator 15 to the lubrication rod 17, and the inner surface of the liner is lubricated.

[Effect of device]

Since the present invention is configured as described above, the lubricator is driven by the motor when the lubrication between the ring and the liner at the stroke center of the liner is poor and the number of pulses from the continuity sensor satisfies the predetermined condition. Since fresh oil having a high alkali value is supplied to the oiling rod from the oiling device provided at the center of the stroke of the liner, it is possible to reduce conventional oil film breakage due to sulfuric acid, corrosive wear, and abrasive wear due to residues. As shown in FIG. 3 in which the wear line of the liner is shown by a solid line, the wear can be remarkably reduced as compared with the conventional example shown by a dotted line, and the wear of the top ring can be remarkably reduced, so that the piston can be kept open for a long time. Further, in the present invention, since the oil is lubricated only when the lubrication is severe, the increase in oil consumption can be reduced.

[Brief description of drawings]

1 to 3 relate to the present invention, FIG. 1 is an embodiment of the present invention, FIG. 2 is a partially enlarged explanatory view of a continuity sensor and an electric circuit of FIG. 1, and FIG. 3 is an effect of the present invention. Wear diagram showing,
FIGS. 4 to 5 are conventional examples, FIG. 4 is a correspondence diagram of FIG. 1, and FIG. 5 is a wear diagram. 1 ... liner, 2 ... top ring, 4,17 ... lubrication rod,
11 ... Continuity sensor, 13 ... Electric pulse processor, 14 ... Motor, 15 ... Lubricator, 18, 19 ... Electrode, 20 ... Insulator, 2
5 ... Controller.

Claims (1)

[Scope of utility model registration request] 1. A conduction sensor provided on the circumference of the cylinder liner near the stroke center, a plurality of lubrication rods provided on the circumference of the cylinder liner near the conduction sensor, and a lubricating oil for the lubrication rod. And a motor for driving the lubricator,
When the top ring crosses the continuity sensor unit and the metal touches, and the number of times the electric resistance becomes zero occurs continuously for N times or more, which is a preset value, the motor is operated for the N times. A cylinder lubrication device having a controller.