Inverted non-stop lifeboat diesel engine lubrication system and flow configuration method thereof

Patent metadata

Field	Value
Publication number	US-10900392-B2
Application number	US-201716603834-A
Country	US
Kind code	B2
Filing date	Dec 1, 2017
Priority date	Jun 7, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A lubrication system includes an engine oil pump, a lubricating oil tank, a breathing pipe, a machine body, and an oil pan. The engine oil pump is formed by superposing upper and lower layers being a lubricating pump and an oil return pump. An oil inlet of the oil return pump leads to a cavity of the oil pan, and an oil outlet leads to an interior of the lubricating oil tank. An oil inlet of the lubricating pump leads to the interior of the lubricating oil tank, and an oil outlet leads to a machine filter. The machine filter is communicated with a main oil path of the machine body. An oil tank cover of the lubricating oil tank is provided with a breathing one-way valve and an oil filling port. The breathing one-way valve communicates one end of the breathing pipe, and the other end thereof communicates a crankcase.

First claim

What is claimed is:

1. An inverted non-stop lifeboat diesel engine lubrication system, the lubrication system comprising an engine oil pump, an overflow valve, a machine filter, and a machine body, a crankcase being provided inside the machine body, and an oil pan being provided at a bottom of the machine body, wherein the lubrication system further comprises a lubricating oil tank and a breathing pipe; the lubricating oil tank is provided beside a gear chamber of a diesel engine, front and back surfaces of the lubricating oil tank are symmetric with a longitudinal vertical plane of a crankshaft axis of the diesel engine, and a support is provided at a bottom of the lubricating oil tank; the engine oil pump is a double pump having oil inlets and oil outlets independent separately, which is formed by superposing upper and lower layers, the upper layer being a lubricating pump and a lower layer being an oil return pump; an oil inlet of the oil return pump is connected to a bottom of a cavity of the oil pan through a pipeline, and an oil outlet of the oil return pump is connected to an interior of the lubricating oil tank through a pipeline; an oil inlet of the lubricating pump is connected to the interior of the lubricating oil tank through a pipeline, and the oil outlet of the lubricating pump is connected to an inlet of the machine filter through a pipeline; an inlet of the overflow valve is connected to a bypass between the oil outlet and the inlet of the machine filter; an outlet of the machine filter is communicated with a main oil path of the machine body; an outlet of the overflow valve is communicated with the crankcase; the lubricating oil tank comprises an oil tank cover and an oil tank body; the oil tank cover is provided with a breathing one-way valve and an oil filling port; an inlet of the breathing one-way valve is provided below the oil tank cover, and an outlet of the breathing one-way valve is provided above the oil tank cover; the outlet of the breathing one-way valve is communicated with one end of the breathing pipe, and the other end of the breathing pipe is communicated with the crankcase; the oil filling port is provided with an oil filling port cover, and the oil filling port cover is provided with an air pressure relief valve; an oil drain valve is provided at a bottom of the oil tank body, and an oil level indicator is provided on a side of the oil tank body.

2. The inverted non-stop lifeboat diesel engine lubrication system according to claim 1 , wherein the engine oil pump is provided in the oil pan, an upper end of a pump shaft of the engine oil pump extends out of a pump body and penetrates though a bearing hole in the machine body, a worm gear is also provided at a top end of the pump shaft, and meshes with a worm provided on a camshaft of the diesel engine, and an upper end of the pump body of the engine oil pump is provided with a flange fixed to the machine body.

3. The inverted non-stop lifeboat diesel engine lubrication system according to claim 1 , wherein the oil pan is a rectangular oil basin, the bottom of the basin inclines from left to right at an inclination angle α of 2-3°, and an oil collection groove is further provided in the bottom of a right end of the oil basin.

4. The inverted non-stop lifeboat diesel engine lubrication system according to claim 1 , wherein the oil return pump comprises a funnel-shaped oil suction port with a filter screen, being provided on a lower right side of the oil collection groove, and a larger end of the funnel-shaped oil suction port faces the bottom of the oil collection groove.

5. The inverted non-stop lifeboat diesel engine lubrication system according to claim 1 , wherein the lubricating pump is provided with a funnel-shaped oil suction port, a larger end of the funnel-shaped oil suction port is provided with a magnetic filter screen facing always downward, and a smaller end of the funnel-shaped oil suction port is connected to a suction port oil pipe end of an oil inlet valve on a side of the lubricating oil tank by a flexible oil pipe.

6. The inverted non-stop lifeboat diesel engine lubrication system according to claim 1 , wherein the breathing one-way valve has a cylindrical casing with an inner wall and an outer wall that are both in shape of single step, an inner diameter and an outer diameter of the cylindrical casing are smaller at upper end than those at lower end, the upper end is an outlet of the breathing one-way valve, the lower end is an inlet of the breathing one-way valve, and both inner and outer of the upper end are provided with thread.

7. The inverted non-stop lifeboat diesel engine lubrication system according to claim 1 , wherein an oil-way distribution block is provided between the machine body and the machine filter, and the overflow valve being provided in the oil-way distribution block.

8. The inverted non-stop lifeboat diesel engine lubrication system according to claim 3 , wherein the oil return pump comprises a funnel-shaped oil suction port with a filter screen, being provided on a lower right side of the oil collection groove, and a larger end of the funnel-shaped oil suction port faces the bottom of the oil collection groove.

9. A method for configuring flow of an inverted non-stop lifeboat diesel engine lubrication system according to claim 1 , the method comprising following steps:
(1) preparation for flow configuration of a lubricating pump: calibrating an engine oil pressure gage on a diesel engine, setting a minimum engine oil pressure alarm value: ≥0.05 MPa, providing a flexible overflow pipe with one end connected to an outlet of an overflow valve and the other end led out of the diesel engine through an oil drain screw hole of an oil pan, putting in a measuring cup, sealing a gap between the oil drain screw hole of the oil pan and the overflow pipe, and filling oil into a lubricating oil tank with an oil quantity configured to be more than or equal to a sum of 1 liter and an oil quantity required for calculating longest theoretical turnover inversion time of a diesel engine test;
(2) engine oil pressure setting at a rated speed of a diesel engine: opening an oil inlet valve and an oil return valve, starting the diesel engine, making a speed of the diesel engine reach the rated speed, adjusting an overflow valve pressure adjusting screw to maintain the engine oil pressure of the diesel engine at 0.25-0.3 MPa, and locking the overflow valve pressure adjusting screw;
(3) flow setting of the lubricating pump: maintaining the diesel engine in a rated working state, and adjusting an opening degree of the oil inlet valve to make the outlet of the overflow valve maintain a continuous overflow rate of 1-2 L/min;
(4) engine oil pressure verification of the diesel engine: fixing the diesel engine to a turnover frame in longitudinal and transverse directions respectively, idling the diesel engine according to Article 6.14.7 in the Revised Recommendation on Lifesaving Equipment Testing passed by the International Maritime Organization's Maritime Safety Committee MSC.81 (70), performing clockwise and counterclockwise turnover test to detect the engine oil pressure of the diesel engine during each test, and if there is an engine oil pressure alarm, increasing the opening degree of the oil inlet valve until there is no pressure alarm for the diesel engine during the whole process of the test;
(5) provision of an engine oil cut-off pipe and determination of oil to be actually stored in an oil tank: providing a cut-off pipe connected between an outlet end of the oil inlet valve and a pipeline tip of an oil inlet of the lubricating pump according to the opening degree of the oil inlet valve, setting a small-hole area of the cut-off pipe to be equal to an openin

Assignees

• Univ Jiangsu Science & Tech

Inventors

• Feng Xuedong
• Ling Youlin
• Zhang Jian
• Tang Wenxian
• Sun Anlong
• Huang Xujin
• Liang Zhongchen
• Zang Wei
• Li Qiang
• Chen Tong
• Shi Jun
• Liang Dongsheng
• Hu Ping
• Feng Yongjun
• Chen Cheng

Classifications

• F01M1/02 Primary

  using lubricating pumps (pumps in general F04; lubricating pumps per se F16N) · CPC title

• F01M2001/1042

  comprising magnetic parts · CPC title

• F01M1/16

  Controlling lubricant pressure or quantity (rendering machines or engines inoperative or idling on lubricant pressure failure F01M1/22) · CPC title

• F01M2001/1092

  comprising valves bypassing the filter · CPC title

• F01M11/0004

  Oilsumps · CPC title