CN-121993276-A - Lubricating oil system and lubricating oil control method for diesel engine

CN121993276ACN 121993276 ACN121993276 ACN 121993276ACN-121993276-A

Abstract

The application discloses an oil lubricating system and an oil lubricating control method of a diesel engine, and belongs to the technical field of diesel engines. The lubricating oil system comprises an oil pan, a lubricating oil pump, a lubricating oil quenching and tempering module and a lubricating module, wherein the lubricating module comprises a core lubricating object, a plurality of non-core lubricating objects and branch pressure limiting valves corresponding to the non-core lubricating objects. The oil pan is used for storing lubricating oil. The lubricating oil pump is used for extracting lubricating oil from the oil pan and conveying the lubricating oil to the lubricating oil tempering module. The lubricating oil tempering module is used for carrying out tempering treatment on the lubricating oil and conveying the lubricating oil subjected to the tempering treatment to the lubricating module. The branch pressure limiting valve is used for controlling the flow of the lubricating oil flowing to the non-core lubricating object. The application realizes an adjustable and controllable lubricating oil system, can reduce the power consumption of a lubricating oil pump, the lubricating oil system and a diesel engine, effectively avoids or reduces the negative influence of the faults of a single oil consumption point on the whole lubricating oil system, and improves the working stability of the lubricating oil system and the diesel engine.

Inventors

CAO YINGJIA
YANG QINGFENG
ZHANG XUEYAN
HU JUNQIANG
HUO XIAOMENG

Assignees

中国船舶集团有限公司第七一一研究所

Dates

Publication Date: 20260508
Application Date: 20260318

Claims (14)

1. A lubricating oil system of a diesel engine is characterized by comprising an oil pan (100), a lubricating oil pump (200), a lubricating oil tempering module (300) and a lubricating module (400), wherein the lubricating module (400) comprises a core lubricating object (410), a plurality of non-core lubricating objects (420) and branch pressure limiting valves (430) corresponding to the non-core lubricating objects (420), The oil pan (100) is used for storing lubricating oil; the lubricating oil pump (200) is used for pumping the lubricating oil from the oil pan (100) and conveying the lubricating oil to the lubricating oil tempering module (300); The lubricating oil quenching and tempering module (300) is used for quenching and tempering the lubricating oil and conveying the lubricating oil subjected to quenching and tempering to the lubricating module (400); the bypass pressure limiting valve (430) is used for controlling the flow of the lubricating oil flowing to the non-core lubricating object (420).
2. The oil system according to claim 1, wherein the bypass pressure limiting valve (430) is an electrically controlled valve or a mechanical valve.
3. The oil system of claim 1, wherein, The core lubricated object (410) includes a crankshaft connecting rod; The plurality of non-core lubricated objects (420) includes an accessory pump, a piston, a valve train, a booster.
4. The system of claim 1, wherein the oil conditioning module (300) comprises a main conditioning unit (310) and a bypass conditioning unit (320), wherein, The main path tempering unit (310) is used for performing first tempering on the lubricating oil and conveying the lubricating oil subjected to the first tempering to the lubricating module (400); the bypass tempering unit (320) is used for performing second tempering on the lubricating oil and conveying the lubricating oil subjected to the second tempering to the oil pan (100).
5. The oil system according to claim 4, wherein the main conditioning unit (310) comprises an oil cooler (311) and a full-flow filter (312), wherein, The lubricating oil cooler (311) is used for cooling the lubricating oil; -said full-flow filter (312) is adapted to perform a first filtering treatment of said lubricating oil; wherein the first thermal refining includes the cooling treatment and the first filtering treatment.
6. The oil system according to claim 4, wherein the bypass tempering unit (320) includes a pressure regulating valve (321), a split filter (322), and a filter pressure limiting valve (323) corresponding to the split filter (322), wherein, The pressure regulating valve (321) is used for regulating the pressure of the lubricating oil; -said split filter (322) is adapted to perform a second filtering treatment of said lubricating oil; -said filter pressure limiting valve (323) is used for flow control of said oil flowing to said split filter (322); wherein the second thermal refining includes the pressure regulating treatment and the second filtering treatment.
7. The oil system according to claim 6, characterized in that the pressure regulating valve (321) is an electrically controlled valve or a mechanical valve and/or the filter pressure limiting valve (323) is the electrically controlled valve or the mechanical valve.
8. The lubricating oil system of claim 1, wherein the lubricating oil pump (200) comprises a pre-feed lubricating oil pump (210) and a belt lubricating oil pump (220), wherein, The pre-feed lubricating oil pump (210) is used for extracting the lubricating oil from the oil pan (100) and conveying the lubricating oil to the lubricating oil tempering module (300) in a starting stage of the diesel engine; The engine-mounted lubricating oil pump (220) is used for extracting the lubricating oil from the oil pan (100) and conveying the lubricating oil to the lubricating oil tempering module (300) in the operation stage of the diesel engine.
9. A method for controlling the lubricating oil of a diesel engine, which is applied to the lubricating oil system according to any one of claims 1 to 8, wherein the method for controlling the lubricating oil comprises the steps of: and adjusting the opening degree of the branch pressure limiting valve so as to control the flow rate of the lubricating oil flowing to the non-core lubricating object.
10. The oil control method according to claim 9, wherein the adjusting the opening degree of the branch pressure limiting valve to perform flow control of the oil flowing to the non-core lubrication target includes: Closing the branch pressure limiting valve corresponding to a first lubricating object in the plurality of non-core lubricating objects in a first working stage of the diesel engine so as to block the lubricating oil from flowing to the first lubricating object; Wherein the first working phase comprises at least one of a start-up phase, a low-speed operation phase, and the first lubrication object comprises at least one of a piston, a supercharger with a sequential supercharging strategy.
11. The oil control method according to claim 9, characterized in that the oil control method further comprises: adjusting the opening degree of a pressure regulating valve to control the flow rate of the lubricating oil flowing to the oil pan; and/or the number of the groups of groups, And adjusting the opening degree of the filter pressure limiting valve to control the flow rate of the lubricating oil flowing to the split-flow filter.
12. The method for controlling oil according to claim 11, wherein, The opening degree of the pressure regulating valve is regulated to control the flow rate of the lubricating oil flowing to the oil pan, and the method comprises the steps of closing the pressure regulating valve to block the flow of the lubricating oil to the oil pan in a first working stage of the diesel engine; The opening degree of the filter pressure limiting valve is regulated to control the flow rate of the lubricating oil flowing to the split-flow filter, and the method comprises the steps of closing the filter pressure limiting valve to block the lubricating oil from flowing to the split-flow filter in the first working stage of the diesel engine; The first working phase comprises at least one of a starting phase and a low-speed operation phase, and the second working phase comprises at least one of a medium-speed operation phase and a high-speed operation phase.
13. The method for controlling oil according to claim 11, wherein, The method includes adjusting an opening degree of a pressure regulating valve to control a flow rate of the lubricating oil flowing to the oil pan, including reducing the opening degree of the pressure regulating valve to reduce the flow rate of the lubricating oil flowing to the oil pan in response to the diesel engine satisfying a first abnormal condition; The opening degree of the filter pressure limiting valve is regulated to control the flow rate of the lubricating oil flowing to the split-flow filter, and the method comprises the steps of responding to the condition that the diesel engine meets the first abnormal condition, reducing the opening degree of the filter pressure limiting valve to reduce the flow rate of the lubricating oil flowing to the split-flow filter; The first abnormal condition comprises at least one of the following conditions that the temperature of the main bearing is increased, the pressure of the lubricating oil inlet machine is reduced, and the second abnormal condition comprises the pressure of the lubricating oil inlet machine is increased.
14. The oil control method according to claim 9, characterized in that the oil control method further comprises: Responding to the reduction of the lubricating oil inlet pressure of the diesel engine, and sequentially performing fault checking treatment on a plurality of non-core lubricating objects until a target lubricating object causing the reduction of the lubricating oil inlet pressure is determined; Reducing the opening degree of the branch pressure limiting valve corresponding to the target lubricating object so as to reduce the flow rate of the lubricating oil flowing to the target lubricating object; The fault checking processing comprises the steps of adjusting the opening degree of the branch pressure limiting valve corresponding to the non-core lubricating object, comparing whether the actual variation of the lubricating oil inlet pressure is matched with a preset expected variation, and if not, determining the non-core lubricating object as the target lubricating object.

Description

Lubricating oil system and lubricating oil control method for diesel engine Technical Field The application relates to the technical field of diesel engines, in particular to a lubricating oil system and a lubricating oil control method of a diesel engine. Background The lubricating oil system is one of the main guarantees of the operation of the diesel engine and is used for reducing the abrasion and cooling main moving parts of the diesel engine. At present, the lubricating oil system is mainly provided with accessories such as a lubricating oil pump, an oil cooler, a filter, a temperature regulating valve, a pressure regulating valve and the like, wherein the lubricating oil pump is used as a driving source of lubricating oil, the temperature is controlled through the oil cooler or the temperature regulating valve, the pressure is controlled through the pressure regulating valve, and lubrication and cooling are provided for a friction pair. However, in the current lubricating oil system, since the oil channels are mutually communicated, a single oil point fault can cause a great negative effect on the whole lubricating oil system. For example, if a plug and a plug of a certain oil point fall off, so that the lubricating oil leaks from the plug, the pressure of the lubricating oil entering the engine will be reduced, and the normal operation of other oil points is affected. Disclosure of Invention The embodiment of the application provides an oil lubricating system and an oil lubricating control method of a diesel engine, which are used for at least partially solving the technical problems. In a first aspect, an embodiment of the application provides an oil system of a diesel engine, which comprises an oil pan, an oil pump, an oil conditioning module and a lubrication module, wherein the lubrication module comprises a core lubrication object, a plurality of non-core lubrication objects and branch pressure limiting valves corresponding to the non-core lubrication objects. The oil pan is used for storing lubricating oil, the lubricating oil pump is used for extracting the lubricating oil from the oil pan and conveying the lubricating oil to the lubricating oil conditioning module, the lubricating oil conditioning module is used for conditioning the lubricating oil and conveying the lubricating oil subjected to conditioning to the lubricating module, and the branch pressure limiting valve is used for controlling the flow of the lubricating oil flowing to the non-core lubricating object. Optionally, the branch pressure limiting valve is an electric control valve or a mechanical valve. Optionally, the core lubrication object comprises a crankshaft connecting rod, and the plurality of non-core lubrication objects comprise an accessory pump, a piston, a valve mechanism and a supercharger. The lubricating oil tempering module comprises a main tempering unit and a bypass tempering unit, wherein the main tempering unit is used for carrying out first tempering on the lubricating oil and conveying the lubricating oil subjected to the first tempering to the lubricating module, and the bypass tempering unit is used for carrying out second tempering on the lubricating oil and conveying the lubricating oil subjected to the second tempering to the oil pan. The main path tempering unit comprises an oil cooler and a full-flow filter, wherein the oil cooler is used for cooling the lubricating oil, the full-flow filter is used for performing first filtering treatment on the lubricating oil, and the first tempering treatment comprises the cooling treatment and the first filtering treatment. The bypass tempering unit comprises a pressure regulating valve, a split filter and a filter pressure limiting valve corresponding to the split filter, wherein the pressure regulating valve is used for regulating pressure of the lubricating oil, the split filter is used for conducting second filtering treatment on the lubricating oil, the filter pressure limiting valve is used for controlling flow of the lubricating oil flowing to the split filter, and the second tempering treatment comprises the pressure regulating treatment and the second filtering treatment. Optionally, the pressure regulating valve is an electric control valve or a mechanical valve, and/or the filter pressure limiting valve is the electric control valve or the mechanical valve. The diesel engine comprises a diesel engine, a diesel oil pump, a diesel oil conditioning module, a pre-supply lubricating oil pump and a machine belt lubricating oil pump, wherein the pre-supply lubricating oil pump is used for extracting lubricating oil from an oil pan and conveying the lubricating oil to the lubricating oil conditioning module in a starting stage of the diesel engine, and the machine belt lubricating oil pump is used for extracting lubricating oil from the oil pan and conveying the lubricating oil to the lubricating oil conditioning module in an operating stage of the diesel e