CN107355280B - Multi-cylinder diesel engine lubricating system for lifeboat - Google Patents
Multi-cylinder diesel engine lubricating system for lifeboat Download PDFInfo
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- CN107355280B CN107355280B CN201710421428.7A CN201710421428A CN107355280B CN 107355280 B CN107355280 B CN 107355280B CN 201710421428 A CN201710421428 A CN 201710421428A CN 107355280 B CN107355280 B CN 107355280B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/386—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling lubrication liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/0004—Oilsumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/04—Filling or draining lubricant of or from machines or engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
- F01M11/062—Accommodating movement or position of machines or engines, e.g. dry sumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
- F01M11/12—Indicating devices; Other safety devices concerning lubricant level
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/0011—Breather valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
- F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
- F01M2001/0238—Rotary pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M2011/0095—Supplementary oil tank
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
A multi-cylinder diesel engine lubricating system for lifeboats is disclosed, which comprises an oil pump, a lubricating oil tank, a breathing tube, a machine body and an oil pan; the oil pump is a duplex pump with independent oil inlet and outlet, which are stacked up and down, the upper layer is a lubricating pump, and the lower layer is an oil return pump; an oil inlet of the oil return pump extends to the bottom of the oil pan cavity, and an oil outlet is arranged in the lubricating oil tank; an oil inlet of the lubricating pump is communicated with the lubricating oil tank, an oil outlet of the lubricating pump is communicated with an inlet of the filter, and an outlet of the filter is communicated with a main oil duct of the machine body; a breathing one-way valve and an oil filling port are arranged on an oil tank cover of the lubricating oil tank; the outlet of the breathing one-way valve is communicated with one end of a breathing pipe, and the other end of the breathing pipe is communicated with the crankcase; meanwhile, a lubricating oil flow configuration method of the lifeboat diesel engine is set, the invention separates the collecting function and the storing function of the oil pan of the lifeboat diesel engine, so that the diesel engine can work normally no matter the diesel engine is turned upside down longitudinally and transversely.
Description
Technical Field
The invention relates to a diesel engine lubricating system, in particular to a multi-cylinder diesel engine lubricating system for a lifeboat, which realizes that the lifeboat drops into water from a dropping rack of a mother ship in a diesel engine working state and belongs to the technical field of marine diesel engines.
Background
The lifeboat is thrown and released on the mother ship, so that the lifesaving efficiency can be greatly improved. This technique is increasingly valued and used by people. However, the main engine of the lifeboat is an inverted parking diesel engine, namely the diesel engine starts to ignite after the lifeboat enters water and is automatically righted, so that some precious life-saving time can be wasted, and the rapid and efficient performance of the lifeboat falling into water is restricted.
At present, when the lifeboat is overturned and inverted, the lubricating system of the diesel engine of the non-stop lifeboat has the problems that the diesel engine can only be overturned around an axis parallel to the axis of a crankshaft, namely, the lifeboat can only be transversely overturned, and oil leaks when the diesel engine is overturned and inverted. Although the diesel engine complies with: international maritime organization international convention on life safety for life saving 2009 and international maritime organization maritime safety committee msc.81(70) at resolution, "revised recommendations on life saving equipment testing", an "engine inversion test 6.14.6, wherein the engine is fixed to a frame rotatable about an axis corresponding to the longitudinal axis of the lifeboat, and a tray is provided under the engine to collect the leaked oil for measurement. 6.14.7 the following steps were followed during the test: … … 6.14.7.8 rotating the running engine 180 deg. clockwise, keeping at 180 deg. position for 10s, then rotating 180 deg. clockwise to complete one circle (the integrated test step, one test of diesel engine needs to complete 6 circles clockwise and counterclockwise); 6.14.8 during the test, the engine should not overheat, fail, or leak more than 250ml of oil on any one inversion. However, it cannot meet the use requirements of the lifeboat diesel engine for throwing from the mother boat keel frame into water in a non-stop state and longitudinal overturning caused by the rolling of sea waves in the running process of the lifeboat.
It is well known that a condition for keeping a diesel engine capable of operating for a short time in a turned-over, inverted state is the need to provide good lubrication for the diesel engine. The existing lifeboat diesel engine is an inverted non-stop device, such as the patent number: 200810154941.5, the device is provided with a main respirator arranged on the cylinder head cover and a secondary respirator arranged on the advancing device cover, wherein the main respirator is used for the positive working of the diesel engine, and the secondary respirator is used for the negative working of the diesel engine; in addition, the main structure of the device also comprises a partition plate arranged between the crankcase and the oil pan cavity to seal and separate the crankcase and the oil pan cavity, and a one-way valve is arranged on the partition plate, when the diesel engine is in a positive position or the transverse inclination is less than or equal to 90 degrees, the one-way valve is in a conducting state, and the crankcase is communicated with the oil pan cavity so as to facilitate oil return of the diesel engine; when the diesel engine is transversely inclined by more than 90 degrees, the valve port of the one-way valve is automatically closed, and the crankcase is separated from the oil pan cavity, so that the engine oil in the oil pan cavity is controlled to flow into the crankcase, the oil suction port of the oil pump is always immersed in the engine oil in the oil pan cavity when the diesel engine is turned over and inverted, and the lubrication of the diesel engine is kept.
The throwing-down type lifeboat is fixed on a mother boat throwing-down frame in a mode that a boat bow faces downwards, the longitudinal direction of the lifeboat and the horizontal plane form an oblique angle of 35-45 degrees, a lifeboat diesel engine is fixed at the bottom of a lifeboat cabin in a mode that the end of a gear chamber faces the boat bow, the end of a flywheel faces the boat stern, when the lifeboat is thrown down, the boat bow directly throws water downwards, the diesel engine turns about 90 degrees along with the longitudinal direction, and the gear chamber faces downwards. Therefore, the existing inverted non-stop lifeboat diesel engine is arranged in the throwing-down lifeboat, then the lifeboat is fixed on the throwing-down frame of the mother ship, the one-way valve on the oil pan partition plate is not stopped, namely the oil pan is communicated with the crankcase of the diesel engine, therefore, a part of engine oil in the cavity of the oil pan shell of the diesel engine flows into the crankcase and the gear chamber through the valve port of the one-way valve, the oil level in the cavity of the oil pan shell is reduced, and the residual engine oil in the cavity of the oil pan shell can not maintain the lubrication of the whole throwing-down process of the diesel; in addition, when the existing diesel engine works, only the engine oil pressure of a lubricating system is controlled, the flow of the diesel engine is not controlled, and a lubricating pump is usually designed to have sufficient margin, so that an overflow valve can generate a large amount of oil overflow when the diesel engine works, the oil temperature is improved, and the oil consumption is increased when the diesel engine is overturned and inverted; the oil storage capacity of the oil pan cavity is increased, the oil level of the diesel engine rises after the dropping frame is fixed, and engine oil submerges the auxiliary respirator of the diesel engine, so that the engine oil flows out of the machine from the auxiliary respirator, and engine oil waste and environmental pollution are caused.
In addition, when the diesel engine is thrown downwards, the engine oil which flows into the crankcase and the gear chamber cover from the oil sump cavity in the original diesel engine is in a fixed state, and a secondary respirator port of the diesel engine is immersed, so that the leakage of the engine oil of the diesel engine is uncontrollable; therefore, the structure can not meet the use requirement of the throwing-down type inverted non-stop lifeboat diesel engine.
In addition, because diesel engine oil pan exterior space is extremely narrow and small in the lifeboat, the diesel engine changes the machine oil, utilizes the dipstick pipe to take out the machine oil from oil pan shell type intracavity usually, and is not only inefficient, hardly takes out the machine oil in the oil pan die cavity moreover.
To sum up, the device that does not stop is invertd to present lifeboat diesel engine, will realize that the lifeboat is under diesel engine operating condition, does not stop from the throwing that the mother's ship falls the frame and throws into water, the problem that needs the solution: 1. the diesel engine cannot be longitudinally turned; 2. external engine oil leaks when the diesel engine is turned over; 3. the flow of the diesel engine lubricating oil cannot be reasonably configured.
Disclosure of Invention
The invention aims to overcome the defects that the existing lubrication system of the diesel engine of the non-stop lifeboat can only transversely turn over but not longitudinally turn over, and engine oil leakage pollution is generated when the diesel engine turns over; and the flow of the lubricating oil of the diesel engine can not be reasonably configured, and the overflow valve has excessive oil overflow, thereby causing resource waste.
The invention relates to a multi-cylinder diesel engine lubricating system for a lifeboat, which meets the use requirements of a lifeboat diesel engine on a throwing-falling frame of a mother ship, throwing water into the lifeboat in a non-stop state, and longitudinal, transverse and other overturning and inverting states of the lifeboat caused by rolling up of sea waves in the running process.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
A multi-cylinder diesel engine lubricating system for a lifeboat comprises an oil pump and a machine body, wherein a crankcase is arranged inside the machine body, and an oil pan is arranged at the bottom of the machine body; the method is characterized in that: the lubricating system also comprises a lubricating oil tank and a breathing pipe; the oil pump is a duplex pump with independent oil inlet and outlet, which are stacked up and down, the upper layer is a lubricating pump, and the lower layer is an oil return pump; an oil inlet of the oil return pump is connected to the bottom of the oil pan cavity through a pipeline, and an oil outlet of the oil return pump is connected into the lubricating oil tank through a pipeline; an oil inlet of the lubricating pump is connected into a lubricating oil tank by a pipeline, an oil outlet of the lubricating pump is connected into an inlet of a filter by a pipeline, and an outlet of the filter is communicated with a main oil duct of the machine body; 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; the inlet of the breathing one-way valve is arranged below the oil tank cover, and the outlet of the breathing one-way valve is arranged above the oil tank cover; the outlet of the breathing one-way valve is communicated with one end of a breathing pipe, and the other end of the breathing pipe is communicated with the crankcase; the oil filler is provided with an oil filler cover, and the oil filler cover is provided with an air pressure safety valve; the bottom of the oil tank body is provided with an oil drain valve, and the side surface of the oil tank body is provided with an oil level indicator.
The object of the invention is further achieved by the following technical solutions.
The oil pump is arranged in the oil sump, the upper end of a pump shaft of the oil pump extends out of the pump body and penetrates through a bearing hole on the machine body, and a worm wheel is further arranged at the upper top end of the pump shaft and meshed with a worm arranged on an upper camshaft of the diesel engine; the upper end of the pump body of the oil pump is provided with a flange which is fixed on the machine body.
The oil return pump and the lubricating pump are rotor pumps.
Under the rated rotation speed of 2800 revolutions per minute of the diesel engine, the theoretical flow of the lubricating pump is designed to be 23-24 liters per minute; the designed theoretical flow of the oil return pump is 1-1.5 liters/minute larger than the flow of the lubricating pump.
In the oil return pump, the oil outlet is connected into the lubricating oil tank through a pipeline, and an oil return valve is arranged between the end of the pipeline of the oil outlet and the lubricating oil tank.
The oil inlet of the lubricating pump is connected into the lubricating oil tank through a pipeline, the oil inlet of the lubricating pump is connected to one end of an intercepting pipe through a pipeline, the other end of the intercepting pipe is connected to the outlet of an oil inlet valve, and the inlet of the oil inlet valve is connected with the end head of a flexible oil pipe in the lubricating oil tank.
The diameter of the intercepting pipe is 5 mm.
The oil level indicator is arranged at the middle upper part of the left side surface of the oil tank body and is vertically installed, and two oil level indicating sections are arranged above and below the oil level indicator; the upper end oil level interval is marked with green, and the lower end oil level interval is marked with blue.
The worm wheel is 13 teeth, the worm is 13 heads, and the modulus of the end surface is 1.5.
The oil pan is a rectangular oil basin, the left of the bottom of the oil pan is high, the right of the bottom of the oil pan is low, the inclination angle α is 2-3 degrees, and an oil collecting groove is further formed in the bottom of the right end of the oil basin.
The oil return pump is provided with the long-strip funnel-shaped oil suction opening with the filter screen, and is arranged at the right lower side of the oil collecting tank, and the large end of the funnel faces the bottom of the oil collecting tank.
The port of the oil suction port of the lubricating pump is funnel-shaped, the large end of the funnel is provided with the magnetic filter screen and faces downwards all the time, and the small end of the funnel is connected to the inlet oil pipe end of the oil inlet valve on the side face of the lubricating oil tank through the flexible oil pipe.
The lubricating oil tank is arranged beside the gear chamber of the diesel engine, the front surface and the rear surface of the lubricating oil tank are symmetrical to the longitudinal vertical plane of the axis of the crankshaft of the diesel engine, and the bottom of the lubricating oil tank is provided with a support fixed at the bottom of the lifeboat.
Above-mentioned lubricating oil tank is equipped with the sealing washer between the fuel tank body and the fuel tank cap.
The lubricating oil tank is a cuboid, the capacity of the lubricating oil tank is 8-9 liters, and the lubricating oil tank is made of stainless steel.
The height of the bracket is not less than 200 mm.
The breathing one-way valve is arranged in the middle of the left side of the oil tank cover.
The shell of the breathing one-way valve is a single-layer step cylindrical shell with an inner hole and an outer shape, the inner diameter and the outer diameter are small at the top and big at the bottom, the upper part is an outlet of the breathing one-way valve, the lower part is an inlet of the breathing one-way valve, and the inner diameter and the outer diameter of the upper end are both provided with threads.
In order to achieve the above object, the flow rate configuration method of the lubrication system of the present invention comprises the steps of:
(1) preparing before the flow configuration of the lubricating pump; calibrating an oil pressure gauge on the diesel engine, and setting a minimum oil pressure alarm value: not less than 0.05 MPa; a flexible overflow pipe is arranged, one end of the overflow pipe is connected to an overflow port of the overflow valve, and the other end of the overflow pipe is led out of the diesel engine through an oil drain screw hole of an oil pan and is placed into a measuring cup; oiling a lubricating oil tank, wherein the oil quantity is 6-7 liters, and the configuration of the required oil quantity plus 1 liter is calculated according to the longest theoretical turnover inversion time of a diesel engine test;
(2) setting the oil pressure of the rated rotating speed of the diesel engine; opening an oil inlet valve and an oil return valve, starting the diesel engine, enabling the rotating speed of the diesel engine to reach the rated rotating speed, adjusting an overflow valve pressure regulating screw, keeping the engine oil pressure of the diesel engine at 0.25-0.3 MPa, and locking the overflow valve pressure regulating screw;
(3) setting the flow of the lubricating pump; the diesel engine is kept in a rated working state, and the opening of the oil inlet valve is adjusted to enable the overflow port of the overflow valve to keep continuous overflow flow of 1-2L/min;
(4) verifying the engine oil pressure of the diesel engine; fixing the diesel engine on a roll-over stand in a longitudinal and transverse mode respectively, operating the diesel engine at idle speed according to revised proposal about life-saving equipment test, 6.14.7, approved by the resolution of the International maritime organization maritime safety Committee MSC.81(70), performing clockwise and anticlockwise roll-over tests, detecting the oil pressure of the diesel engine in each test process, and increasing the opening of an oil inlet valve until the whole test process is finished if the oil pressure gives an alarm;
(5) setting an engine oil shutoff pipe and determining the actual oil storage requirement of the oil tank; according to the opening of the oil inlet valve, an intercepting pipe is arranged and connected between the outlet end of the oil inlet valve and the end head of the oil inlet pipeline, the intercepting pipe is a thin-wall small hole, and the area of the small hole of the intercepting pipe is equal to the opening area of the oil inlet valve; determining the actual oil storage requirement of the lubricating oil tank according to the observed lowest oil level height after overturning;
(6) verifying the engine oil pressure of the diesel engine again: opening an oil inlet valve and an oil return valve, keeping the engine oil pressure at 0.25-0.3 MPa under the rated rotation speed of the diesel engine, and not alarming the engine oil pressure under the idling operation; otherwise, repeating the step (5);
(7) resetting; and disassembling the oil pan, dismantling the overflow pipe and resetting the oil pan again.
The invention has the advantages and beneficial effects that:
the invention separates the collecting function and the storing function of the oil pan of the lifeboat diesel engine, the oil pan collects the oil, and a lubricating oil tank is separately arranged outside the lifeboat diesel engine to store the oil. When the diesel engine works, the lubricating pump is used for conveying the engine oil in the lubricating oil tank to a main oil duct lubricating machine of the diesel engine through the filter, and meanwhile, the oil returning pump is used for conveying the engine oil which is lubricated and collected in the oil bottom shell to the lubricating oil tank for storage; the engine oil of the diesel engine can be recycled. The lubricating pump oil inlet valve obtains accurate cut-off pipe drift diameter and the actual required oil storage amount of the oil tank through tests, so that the oil demand when the diesel engine is inverted is reduced, and the temperature rise caused by engine oil overflow is reduced, thereby enabling the product structure to be more scientific. The lubricating pump is connected with the oil suction port in the lubricating oil tank by adopting a flexible oil pipe, so that the engine oil in the lubricating oil tank can be fully utilized.
The oil return pump of the invention has slightly larger flow than the lubricating pump, so that when the diesel engine works, no oil is stored in the oil sump, and no matter the diesel engine is longitudinally, transversely overturned or inverted, no engine oil overflows from the engine body, thereby causing the leakage pollution of the engine oil.
In addition, the lubricating oil tank of the engine oil is fixed outside the body of the diesel engine, so that the heat dissipation environment of the engine oil is improved, an engine oil cooler is omitted, and the oil level is more convenient to observe by arranging a liquid level meter of the lubricating oil tank; the oil drain valve is arranged at the lower part of the lubricating oil tank, and the lubricating oil tank is erected, so that the engine oil of the diesel engine is more convenient to replace; the gas collection space at the upper left part in the lubricating oil tank is communicated with the crankcase through a pipeline, so that the phenomenon that the outlet of a breathing one-way valve in the lubricating oil tank is blocked by engine oil when the lifeboat is fixed on a throwing frame or thrown off is avoided, the air pressure balance of the lubricating oil tank is met, the oil gas is prevented from leaking, and the lubricating oil tank is more environment-friendly in discharge; the safety valve arranged on the oil filling port cover of the lubricating oil tank ensures the use safety of the lubricating oil tank.
In addition, the worm arranged on the inner cam shaft of the machine body drives the worm wheel on the pump shaft of the duplex oil pump, so that the power transmission of the oil pump is realized, and the structure is more compact.
Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a diesel engine and its oil tank connection
FIG. 2 schematic view of the lubrication system of the present invention
FIG. 3 is a longitudinal sectional view of a diesel engine according to the present invention
FIG. 4 is a cross sectional view of a diesel engine according to the present invention
FIG. 5 is a schematic view of the one-way valve 132 of the respirator of the present invention
In the figure: 101. the oil pump comprises a body, 102, a main oil gallery, 103, a positioning hole, 104, a camshaft, 104A, a worm, 105, a worm wheel, 106, a bearing, 107, a kidney-shaped flange, 108, a screw, 109, an oil pump housing, 110, a pump shaft, 111, a lubrication pump, 112, a scavenge pump, 114, a scavenge pump oil suction port, 118, an oil pan, 118A, an oil drain screw hole, 119, an oil distribution block, 122, an scavenge valve, 123, an oil inlet valve, 1231, a shutoff pipe, 124, a flexible oil pipe, 125, an oil tank cover, 126, an oil suction port, 127, a lube oil tank, 127A, an oil tank body, 128, an oil drain valve, 129, an oil level indicator, 130, an oil filling port, 131, an air pressure safety valve, 132, a breather check valve, 1321, an opening pin, 1322, a steel ball, 1323, a housing, 1324, a valve, 1325, a step, 1326, an external thread, a 1327, an internal thread, a 133, a breather pipe, 134.
Detailed Description
In order to make the object and technical solution of the present invention clearer, the present invention is further explained with reference to the accompanying drawings and examples:
it will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The terms "left, right, up, down, front and back" used in the present invention mean that when the reader faces the drawings, the left side of the reader is left, the right side of the reader is right, the upper side of the reader is up, the lower side of the reader is down, the surface in the front paper of the reader is front, and the surface facing the reader is back, and not specifically limited to the present invention.
The term "connected" as used herein may mean either a direct connection between the components or an indirect connection between the components via other components.
As shown in fig. 1 and 2, the lubricating oil tank 127 is a rectangular parallelepiped, and includes a tank body 127A and a tank cap 125, and a seal ring is further provided between the tank body and the tank cap. The capacity is about 8-9 liters, and according to the test, 6-7 liters of oil is required to be stored, so that the lubricating requirement of the diesel engine during the overturning and inverting test is ensured, and the diesel engine is made of stainless steel. The lubricating oil tank 127 is arranged beside a gear chamber of the diesel engine, the front surface and the rear surface of the lubricating oil tank 127 are symmetrical to the vertical plane of the axis of the crankshaft of the diesel engine, the bottom of the lubricating oil tank 127 is provided with a support 151, the support 151 is fixed at the bottom of a cabin, and the height of the support 151 is 200-250 mm. A filler opening 130 and a check valve 132 are provided on the fuel tank cap 125, respectively, and the check valve 132 is provided in the middle of the left side of the fuel tank cap 125. On the left side surface of the tank body 127A, a fuel level indicator 129, an oil return valve 122 and an oil feed valve 123 are vertically installed, respectively. The oil level indicator 129 is provided with two oil level indicating sections up and down, and the oil level section at the upper end is a green mark and is a diesel engine oil level mark when the lifeboat is rightly arranged; the lower end oil level interval is a blue mark and is used for marking the oil level of the diesel engine when the lifeboat is fixed on the throwing-falling frame; the lower-end oil level section mark is an upper-end oil level section, which is a mapping section inclined upward by 35 ° at the left end of the lubricating oil tank 127. An oil drain valve 128 is provided at a lower portion of the right side surface of the oil tank body 127A, so that the oil can be easily replaced. Inside the oil tank body 127A, the right end of the oil inlet valve 123 is connected with a flexible oil pipe 124, the other end of the flexible oil pipe 124 is connected with a funnel-shaped oil suction port 126 with a magnetic adsorption function, the oil suction port 126 can be turned over and inverted along with the lubricating oil tank 127 under the action of self gravity, a suction port of the oil suction port 126 is always downward, and the suction port 126 is kept at the lower part of engine oil in the lubricating oil tank 127, so that oil can be fed into the oil suction port 126 of the lubricating pump 111 when the diesel engine is turned over and inverted, and the lubrication of the diesel engine is met.
The oil filler 130 is provided with an oil filler cover, the oil filler cover is provided with an air pressure safety valve 131, the set pressure value of the air pressure safety valve 131 is 1150-1200 kPa, when the air pressure in the lubricating oil tank 127 reaches the value, the air pressure safety valve 131 automatically opens for air exhaust, and when the pressure value is reduced to 1120-1100 kPa, the air pressure safety valve 131 automatically closes;
as shown in fig. 5, the structure of the breathing check valve 132 includes a single-layer step cylindrical housing 1323 with an inner hole and an outer circle, the inner diameter and the outer diameter are both small at the top and large at the bottom, a steel ball 1322 with a diameter smaller than the inner diameter of the cylinder by 2-3 mm is arranged in the lower inner hole of the housing 1323, a circular valve 1324 is arranged at the junction of the upper inner hole and the lower inner hole of the housing 1323 and can be blocked by the steel ball 1322, a hole 1321 penetrating through the cotter pin is radially arranged at the lower end of the housing 1323, the steel ball 1322 is always kept in the lower inner hole of the housing 1323 by the blocking of the cotter pin; the breathing check valve 132 is fixed to the left middle portion of the fuel tank cap 125 by a nut using the external thread 1326 of the upper end of the housing 1323 and the step 1325, the internal thread 1327 is connected to one end of the breathing tube 133, and the other end of the breathing tube 133 is connected to the crankcase. The breathing passage of the lubricating oil tank 127 is: the breathing check valve 132, the breathing tube 133, the oil separation block 119, and a crankcase in the body 101.
The function of the breathing check valve 132 is that when the lubricating oil tank 127 is inverted along with the lifeboat, the steel ball 1322 blocks the air valve 1324 under the action of gravity, the check valve 132 is closed, so that the engine oil in the lubricating oil tank 127 is prevented from flowing into a crankcase in the body 101, and when the lubricating oil tank 127 is rightly arranged, the steel ball 1322 falls back to the lower end of the lower inner hole of the shell 1323.
As shown in fig. 2, 3 and 4, an oil pan 118 is arranged at the lower part of a machine body 101, the bottom of the oil pan 118 is high at the left and low at the right in the axial direction of the diesel engine, an inclination angle α is 2-3 degrees, an oil collecting tank is arranged at the bottom of the right side, an oil pump is arranged at the right side in the oil pan 118, the oil pump is a duplex rotor pump with independent oil inlet and outlet, the oil pump is superposed up and down, the upper layer is a lubricating pump 111, the lower layer is an oil return pump 112, the theoretical flow of the lubricating pump 111 is 23-24 liters/minute at the rated rotation speed of the diesel engine of 2800 revolutions per minute, and the theoretical flow of the oil return pump 112 is 1-1.5 liters per minute.
The oil return pump oil suction port 114 is arranged on the right side below an oil collecting groove of the oil pan 118 and is in a long strip shape; the oil outlet line of the scavenge pump 112, the scavenge pump 112 oil outlet end-oil distribution block 119-scavenge valve 122-lube oil tank 127.
Oil inlet route of the lubrication pump 111: the oil suction port 126, the flexible oil pipe 124, the oil inlet valve 123, the shutoff pipe 1231, the oil distribution block 119 and the oil inlet end of the lubricating pump 111. Oil outlet route of the lubrication pump 111: before engine oil enters the engine filter 134, an overflow valve 135 is arranged in the oil dividing block 119 to control the pressure of the engine oil in the main oil duct 102 to be 0.25-0.3 Pa, and the overflow oil of the overflow valve 135 flows back to a crankcase in the diesel engine.
As shown in fig. 4, the lubricating pump 111 and the oil return pump 112 share a pump shaft 110 and an oil pump housing 109, the pump shaft 110 passes through a positioning hole 103 formed in the machine body 101, is positioned in the bearing 106, and is fixed on the machine body 101 by a screw 108 through a kidney-shaped flange 107 arranged at the upper end of the oil pump housing 109, a worm wheel 105 fixed at the upper end of the pump shaft 110 is meshed with a worm 104A arranged on the cam shaft 104, the worm wheel 105 is 13 teeth, and the worm 104A is 13 heads, i.e. the transmission ratio is 1:1, and the end face module is 1.5, therefore, the oil pump of the invention transmits power through the cam shaft 104, and has a more compact structure.
As shown in fig. 1, fig. 2, and fig. 4, the flow rate configuration method of the lubrication system of the present embodiment includes the following steps:
(1) preparing a lubricating pump 111 before flow configuration; calibrating the 0 bit of an oil pressure gauge on the diesel engine, and setting a minimum oil pressure alarm value: not less than 0.05 MPa; selecting a flexible pipe with the inner diameter of phi 10, connecting one end of the flexible pipe with a pipe joint, connecting the pipe joint to an overflow port of the oil distribution block 119, leading the other end of the overflow pipe out of the diesel engine through an oil drain screw hole 118A of the oil pan 118, placing the diesel engine into a measuring cup, and plugging a gap of the oil drain screw hole 118A by cork wood; the lubricating oil tank 127 was filled with engine oil in an amount of 7 liters.
(2) Setting the oil pressure at the rated rotation speed of the diesel engine; and opening the oil inlet valve 123 and the oil return valve 122, starting the diesel engine, enabling the rotating speed of the diesel engine to reach the rated rotating speed of 2800 r/min, adjusting the pressure regulating screw of the overflow valve 135, keeping the engine oil pressure of the diesel engine at 0.28-0.3 MPa, and locking the pressure regulating screw of the overflow valve 135.
(3) Setting the flow of the lubricating pump 111; the diesel engine keeps the rated rotating speed, the opening degree of the oil inlet valve 123 is reduced to 62%, the continuous overflow flow of the overflow port of the overflow valve 135 is 1.8L/min, and the opening degree of the oil inlet valve 123 is locked.
(4) Verifying the engine oil pressure of the diesel engine; the diesel engine is respectively fixed on the roll-over stand in a longitudinal and transverse mode, the diesel engine runs at idle speed according to revised proposal about life-saving equipment test, 6.14.7, approved by the international maritime organization maritime safety committee MSC.81(70), and clockwise and anticlockwise roll-over tests are carried out, the change range of the engine oil pressure of the diesel engine is 0.08-0.12 MPa in the test process, no alarm is given, and the diesel engine accords with the setting.
(5) An engine oil shutoff pipe 1231 is arranged and the actual oil storage requirement of the lubricating oil tank 127 is determined; an intercepting pipe is arranged and connected between the outlet end of the oil inlet valve 123 and the end of the oil inlet pipeline, and the area of the pipe hole is equal to the opening area of the oil inlet valve, so that the diameter of the pipe hole of the intercepting pipe is approximately reduced to phi 5.0 mm; the length of the tube was 12.0 mm and the remaining volume was about 3.5 litres depending on the minimum level observed after inversion, thus determining that the tank actually required 6 litres of stored oil.
(6) Verifying the engine oil pressure of the diesel engine again: opening an oil inlet valve and an oil return valve, keeping the engine oil pressure at 0.25-0.3 MPa at the rated rotation speed of 2800 rpm of the diesel engine, and not alarming the engine oil pressure during idling;
(7) resetting; and disassembling the oil pan, dismantling the overflow pipe and resetting the oil pan again.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (8)
1. A multi-cylinder diesel engine lubricating system for a lifeboat comprises an oil pump and a machine body, wherein a crankcase is arranged inside the machine body, and an oil pan is arranged at the bottom of the machine body; the method is characterized in that: the lubricating system also comprises a lubricating oil tank and a breathing pipe; the oil pump is a duplex pump with independent oil inlet and outlet, which are stacked up and down, the upper layer is a lubricating pump, and the lower layer is an oil return pump; the oil return pump and the lubricating pump are both rotor pumps; an oil inlet of the oil return pump is connected to the bottom of the oil pan cavity through a pipeline, and an oil outlet of the oil return pump is connected into the lubricating oil tank through a pipeline; an oil inlet of the lubricating pump is connected to an intercepting pipe through a pipeline, an oil inlet valve is connected into a lubricating oil tank, an oil outlet is connected to an inlet of a mechanical filter through a pipeline, a bypass between the oil outlet and the inlet of the mechanical filter is connected with an inlet of an overflow valve, an outlet of the overflow valve is communicated with a crankcase, and an outlet of the mechanical filter is communicated with a main oil duct of a machine body; the working overflow valve of the diesel engine keeps the continuous oil spilling flow at 1-2L/min under the rated rotating speed, and the working oil pressure does not alarm under the idling; 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; the inlet of the breathing one-way valve is arranged below the oil tank cover, and the outlet of the breathing one-way valve is arranged above the oil tank cover; the outlet of the breathing one-way valve is communicated with one end of a breathing pipe, and the other end of the breathing pipe is communicated with the crankcase; the oil filler is provided with an oil filler cover, and the oil filler cover is provided with an air pressure safety valve; the engine oil stored in the lubricating oil tank is configured to be more than the engine oil amount +1 liter required by the longest theoretical overturning and inverting time of a diesel engine overturning test; the bottom of the oil tank body is provided with an oil drain valve, and the side surface of the oil tank body is provided with an oil level indicator;
the port of the oil suction port of the lubricating pump is funnel-shaped, the large end of the funnel is provided with a magnetic filter screen and faces downwards all the time, and the small end of the funnel is connected to the inlet end of an oil inlet valve on the side face of a lubricating oil tank by utilizing a flexible oil pipe.
2. The multi-cylinder diesel engine lubricating system for the lifeboat of claim 1, wherein: the oil pump is arranged in the oil sump, the upper end of a pump shaft of the oil pump extends out of the pump body and penetrates through a bearing hole on the machine body, and a worm wheel is further arranged at the upper top end of the pump shaft and meshed with a worm arranged on an upper camshaft of the diesel engine; the upper end of the pump body of the oil pump is provided with a flange which is fixed on the machine body.
3. The multi-cylinder diesel engine lubricating system for the lifeboat of claim 1, wherein the oil pan is a rectangular oil pan, the bottom of the oil pan is high at the left and low at the right, the inclination angle α is 2-3 degrees, and an oil collecting tank is further arranged at the bottom of the right end of the oil pan.
4. The multi-cylinder diesel engine lubrication system for lifeboats of claim 3, wherein: the oil return pump is provided with a long-strip funnel-shaped oil suction opening with a filter screen and is arranged at the right lower side of the oil collecting tank, and the large end of the funnel faces the bottom of the oil collecting tank.
5. The multi-cylinder diesel engine lubricating system for the lifeboat of claim 1, wherein: the shell of the breathing one-way valve is a single-layer step cylindrical shell with an inner hole and an outer shape, the inner diameter and the outer diameter are small at the top and big at the bottom, the upper part is an outlet of the breathing one-way valve, the lower part is an inlet of the breathing one-way valve, and the inner diameter and the outer diameter of the upper end are both provided with threads.
6. The multi-cylinder diesel engine lubricating system for the lifeboat of claim 1, wherein: an oil inlet of the lubricating pump is connected into the lubricating oil tank through a pipeline, an oil inlet of the lubricating pump is connected to one end of an intercepting pipe through a pipeline, the other end of the intercepting pipe is connected to an outlet of an oil inlet valve, and an inlet of the oil inlet valve is connected with the end head of a flexible oil pipe in the lubricating oil tank.
7. The multi-cylinder diesel engine lubrication system for lifeboats of claim 6, wherein: the diameter of the cut-off pipe is phi 5 mm.
8. The multi-cylinder diesel engine lubricating system for the lifeboat of claim 1, wherein: the lubricating oil tank is arranged beside the gear chamber of the diesel engine, the front surface and the rear surface of the lubricating oil tank are symmetrical about the longitudinal vertical plane of the axis of the crankshaft of the diesel engine, and the bottom of the lubricating oil tank is provided with a support fixed at the bottom of the lifeboat.
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| CN107246296B (en) * | 2017-06-07 | 2020-05-29 | 江苏科技大学 | Lubricating system for diesel engine of inverted non-stop lifeboat and flow configuration method thereof |
| CN110284939B (en) | 2017-06-08 | 2021-03-02 | 江苏科技大学 | Multi-cylinder diesel engine inversion non-stop device for throwing boat |
| CN111156310B (en) * | 2020-02-26 | 2024-04-09 | 上海尚实能源科技有限公司 | Gear box gravity oil return mechanical check valve |
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| CN1820124A (en) * | 2004-06-22 | 2006-08-16 | 丰田自动车株式会社 | Control apparatus for dry sump type internal combustion engine |
| CN201474747U (en) * | 2009-04-20 | 2010-05-19 | 浙江圣奇运动器械制造有限公司 | Side-arranged oil tank device for four-stroke engine |
| CN104358906A (en) * | 2014-11-18 | 2015-02-18 | 温州仁谦汽车油泵有限公司 | Steel ball type overturn valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016023585A (en) * | 2014-07-18 | 2016-02-08 | ヤマハ発動機株式会社 | Engine unit |
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Patent Citations (4)
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|---|---|---|---|---|
| GB1065679A (en) * | 1963-12-09 | 1967-04-19 | Simca Automobiles Sa | Improvements in and relating to internal combustion engines |
| CN1820124A (en) * | 2004-06-22 | 2006-08-16 | 丰田自动车株式会社 | Control apparatus for dry sump type internal combustion engine |
| CN201474747U (en) * | 2009-04-20 | 2010-05-19 | 浙江圣奇运动器械制造有限公司 | Side-arranged oil tank device for four-stroke engine |
| CN104358906A (en) * | 2014-11-18 | 2015-02-18 | 温州仁谦汽车油泵有限公司 | Steel ball type overturn valve |
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Application publication date: 20171117 Assignee: Zhenjiang Siyang Diesel Engine Manufacturing Co.,Ltd. Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2020320000100 Denomination of invention: A lubricating system of multi cylinder diesel engine for lifeboat Granted publication date: 20200529 License type: Exclusive License Record date: 20201028 |
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Effective date of registration: 20220418 Address after: 212021 No. 69 liumai Road, Zhenjiang high tech Industrial Development Zone, Zhenjiang City, Jiangsu Province Patentee after: Zhenjiang Siyang Diesel Engine Manufacturing Co.,Ltd. Address before: 212003, No. 2, Mengxi Road, Zhenjiang, Jiangsu Patentee before: JIANGSU University OF SCIENCE AND TECHNOLOGY |
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