CN115013712A

CN115013712A - Lubricating oil system and method for heating lubricating oil

Info

Publication number: CN115013712A
Application number: CN202210718733.3A
Authority: CN
Inventors: 刘志杰; 孙汪宇; 张亭; 邹江磊; 张聪; 查万春; 吴琼; 王文书; 冯宁
Original assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Current assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-09-06
Anticipated expiration: 2042-06-23
Also published as: CN115013712B

Abstract

The application discloses a lubricating oil system and a lubricating oil heating method, and relates to the technical field of mechanical equipment. The lubricating oil system comprises an oil storage tank, an oil delivery main pipeline, an oil delivery branch pipeline, an electromagnetic valve, a shutoff valve and a combustion heating device, wherein one end of the oil delivery main pipeline is communicated with the oil storage tank, the electromagnetic valve is arranged on the oil delivery main pipeline and is provided with a first valve position and a second valve position, one end of the oil delivery branch pipeline is communicated with the oil storage tank, the other end of the oil delivery branch pipeline is communicated with the electromagnetic valve, the combustion heating device and the shutoff valve are both arranged on the oil delivery branch pipeline, the shutoff valve is positioned at the upstream of the combustion heating device, and the electromagnetic valve is positioned at the first valve position under the condition that the shutoff valve is in an open state, so that the oil storage tank is communicated with the oil delivery branch pipeline; when the shut-off valve is in a closed state, the solenoid valve is in the second valve position to disconnect the reservoir from the branch conduit. The scheme can solve the problem that the heating time of the existing lubricating oil is long.

Description

Lubricating oil system and method for heating lubricating oil

Technical Field

The application belongs to the technical field of mechanical equipment, and particularly relates to a lubricating oil system and a lubricating oil heating method.

Background

The lubricating oil system is one of the indispensable auxiliary systems in mechanical equipment, and mainly realizes the operations of storage, pressure rise, filtration, cooling and the like of lubricating oil. The lubricating oil is mainly used for reducing friction of mechanical equipment so as to protect the mechanical equipment, and the lubricating oil has certain viscosity which is obviously increased along with the reduction of temperature, so that the lubricating oil needs to be preheated before the equipment is started in order to ensure the fluidity and the lubricating effect of the lubricating oil, and the viscosity of the lubricating oil is controlled within a proper range.

The common lubricating oil heating method comprises the following steps: the electric heater is arranged at the bottom of the lubricating oil storage tank, converts electric energy into heat energy and conducts the heat energy to the lubricating oil, and because the lubricating oil is used in a large amount, the electric heater is low in heating power and uneven in heating and needs to be heated for a long time. However, for some emergency equipment which needs to be started quickly or mobile equipment which runs outdoors, too long heating time brings inconvenience to the running of the equipment and the running of upstream and downstream devices, and the effect of quick running cannot be realized; in addition, in the case of mobile devices, the long-time electric heating operation cannot be completed without a large-capacity external power supply device.

Disclosure of Invention

The embodiment of the application aims to provide a lubricating oil system and a lubricating oil heating method, and the problem that the conventional lubricating oil is long in heating time can be solved.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a lubricating oil system, including an oil storage tank, an oil transportation main pipeline, an oil transportation branch pipeline, an electromagnetic valve, a shutoff valve, and a combustion heating device, wherein one end of the oil transportation main pipeline is communicated with the oil storage tank, the electromagnetic valve is disposed in the oil transportation main pipeline, the electromagnetic valve has a first valve position and a second valve position, one end of the oil transportation branch pipeline is communicated with the oil storage tank, the other end of the oil transportation branch pipeline is communicated with the electromagnetic valve, the combustion heating device and the shutoff valve are both disposed on the oil transportation branch pipeline, and the shutoff valve is disposed at an upstream of the combustion heating device,

under the condition that the shutoff valve is in an open state, the electromagnetic valve is positioned at the first valve position, so that the oil storage tank is communicated with the oil transportation branch pipeline; and under the condition that the shutoff valve is in a closed state, the electromagnetic valve is positioned at the second valve position so as to disconnect the oil storage tank from the oil transportation branch pipeline.

In a second aspect, an embodiment of the present application further provides a method for heating lubricating oil, which is applied to the above lubricating oil system, and the heating method includes:

under the condition that the shutoff valve is in an open state, adjusting the electromagnetic valve to the first valve position to enable the oil storage tank to be communicated with the oil transportation branch pipeline;

and under the condition that the shutoff valve is in a closed state, adjusting the electromagnetic valve to the second valve position so as to disconnect the oil storage tank from the oil transportation branch pipeline.

In the embodiment of the application, under the condition that the shut-off valve is in an open state, the electromagnetic valve is located at the first valve position, so that the oil storage tank is communicated with the oil transportation branch pipeline, meanwhile, the lubricating oil in the oil transportation branch pipeline is heated through the combustion heating device, and as the combustion heating device adopts a fuel combustion mode to release heat, the energy conversion utilization rate is high, the rapid heating can be realized, the fuel source is flexible, and the sustainability is realized; under the condition that the shutoff valve is in a closed state, the electromagnetic valve is located at the second valve position, so that the oil storage tank is disconnected from the oil transportation branch pipeline, and at the moment, lubricating oil in the oil storage tank can meet the use requirement of mechanical equipment. Therefore, the problem that the heating time of the lubricating oil is long at present can be solved.

Drawings

FIG. 1 is a schematic diagram of a portion of a lubricating oil system according to an embodiment of the present disclosure;

fig. 2 is a sectional view of a partial structure of a combustion heating apparatus disclosed in an embodiment of the present application;

fig. 3 is a partial structural schematic diagram of a combustion heating device disclosed in an embodiment of the present application.

Description of reference numerals:

100-an oil storage tank;

200-oil transportation main pipeline;

300-an oil transportation branch pipeline, 310-a first pipe section, 311-a first spiral fin, 320-an oil inlet end and 330-an oil outlet end;

400-electromagnetic valve;

500-shut off valve;

600-combustion heating device, 610-burner, 611-combustion chamber, 612-first air channel, 613-inner cylinder, 614-outer cylinder, 615-cyclone, 616-fuel conveying pipeline, 617-combustion nozzle, 620-gas heat exchanger, 621-air inlet, 622-second air channel, 623-flue gas channel, 624-flue gas outlet, 625-shell, 626-heat exchange pipeline, 626 a-first heat exchange pipeline, 626 b-second heat exchange pipeline, 626 c-second spiral fin, 627-baffle, 628-baffle, 629-collecting chamber, 630-fuel booster, 640-circulating pump, 650-air blower, 660-smoke exhaust pipeline;

700-temperature detection element.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The lubricating oil system provided by the embodiment of the present application is described in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

As shown in fig. 1 to 3, an embodiment of the present application provides a lubricating oil system, which includes an oil storage tank 100, a main oil delivery pipeline 200, a branch oil delivery pipeline 300, a solenoid valve 400, a shut-off valve 500, and a combustion heating device 600. The oil reservoir 100 is used to store lubricating oil. One end of the main oil delivery pipeline 200 is communicated with an oil inlet of the oil storage tank 100, the electromagnetic valve 400 is disposed in the main oil delivery pipeline 200, the electromagnetic valve 400 has a first valve position and a second valve position, optionally, the electromagnetic valve 400 may be a two-position three-way valve, and of course, the electromagnetic valve 400 may also be another type of electromagnetic valve 400, and there is no specific limitation here. One end of the branch oil delivery pipe 300 is connected to the oil outlet of the oil storage tank 100, the other end of the branch oil delivery pipe 300 is connected to the solenoid valve 400, so as to form a circulation loop, the combustion heating device 600 and the shut-off valve 500 are disposed on the branch oil delivery pipe 300, and the shut-off valve 500 is located upstream of the combustion heating device 600, so as to control the on/off of the branch oil delivery pipe 300. When the shut-off valve 500 is in the open state, the solenoid valve 400 is located at the first valve position to communicate the oil storage tank 100 with the branch oil delivery pipe 300, and at the same time, the lubricating oil in the branch oil delivery pipe 300 is heated by the combustion heating device 600, and the heated lubricating oil is delivered to the oil storage tank 100, and at this time, the density of the heated lubricating oil is low and floats on the upper portion of the accommodating space of the oil storage tank 100, and the low-temperature lubricating oil is continuously sucked into the lubricating oil heating device 600. Because the combustion heating device 600 adopts a fuel combustion mode to release heat, the energy conversion utilization rate is high, the heating can be rapidly realized, and the fuel source is flexible and has sustainability; when the shut-off valve 500 is in the closed state, the solenoid valve 400 is located at the second valve position to disconnect the oil storage tank 100 from the branch oil delivery pipe 300, and the lubricating oil in the oil storage tank 100 can meet the use requirement of the mechanical equipment. Therefore, the problem that the heating time of the lubricating oil is long at present can be solved.

The fuel used for combustion in the combustion heating apparatus 600 in the embodiment of the present application may be a liquid fuel such as diesel fuel, a gas fuel such as natural gas, or a solid fuel, and is not particularly limited herein.

In an alternative embodiment, the combustion heating apparatus 600 includes a combustor 610, the combustor 610 has a combustion chamber 611, the first pipe section 310 of the oil branch pipe 300 is located in the combustion chamber 611, and heat in the combustion chamber 611 heats the lubricant oil flowing in the first pipe section 310 in a heat transfer manner through the first pipe section 310. Alternatively, the outer peripheral surface of the first pipe section 310 may be a smooth surface, and the heated area of the outer peripheral surface is smaller; therefore, further alternatively, the outer circumferential surface of the first pipe section 310 is provided with the first helical fins 311, so that the heat receiving area of the first pipe section 310 is increased, and more heat is transferred to the lubricating oil, so that the heating efficiency of the lubricating oil is increased, and the fuel utilization rate can be improved.

In a further alternative embodiment, the burner 610 is provided with a first air channel 612, the first air channel 612 is communicated with the combustion chamber 611, the combustion heating device 600 further comprises a gas heat exchanger 620, the gas heat exchanger 620 is provided with an air inlet 621, a second air channel 622, a smoke channel 623 and a smoke outlet 624, the smoke channel 623 is arranged adjacent to the second air channel 622, the combustion chamber 611 is communicated with the smoke outlet 624 through the smoke channel 623, and the air inlet 621 is communicated with the first air channel 612 through the second air channel 622. Air enters the second air channel 622 from the air inlet 621, and because the residual temperature of the flue gas circulating in the flue gas channel 623 is higher, the air in the second air channel 622 is heated by the partial heat in a heat transfer manner, and then the heated air enters the combustion chamber 611 through the first air channel 612 to meet the combustion temperature. Therefore, the gas heat exchanger 620 in the embodiment of the present application further improves the fuel utilization rate, and is beneficial to improving the heating efficiency of the lubricating oil and shortening the heating time. Certainly, the air inlet 621 in the embodiment of the present application may also be directly provided in the combustor 610, and at this time, the temperature of the air introduced into the combustion chamber 611 is low, and a part of heat in the combustion chamber 611 needs to be utilized to heat the air, so compared with the case where the air inlet 621 is provided in the gas heat exchanger 620, the air is heated by the residual temperature of the flue gas and then enters the combustion chamber 611, and the heating time of the lubricating oil is longer.

Optionally, the combustor 610 includes an inner tube 613 and an outer tube 614, the inner tube 613 has a combustion chamber 611, a first air passage 612 is formed between the inner tube 613 and the outer tube 614, and since the air flowing through the first air passage 612 has a certain temperature, the first air passage 612 has a heat insulation effect with respect to the combustion chamber 611, so as to avoid heat dissipation. The gas heat exchanger 620 includes a housing 625 and a heat exchange pipe 626, the heat exchange pipe 626 is disposed in the housing 625, the housing 625 is provided with an air inlet 621, the housing 625 is connected to the outer barrel 614, optionally, the housing 625 and the outer barrel 614 may be an integrated structure for easy installation, of course, the housing 625 and the outer barrel 614 may also be a split structure, and at this time, the housing 625 and the outer barrel 614 are connected by welding or the like, which is not limited specifically here. A smoke channel 623 is formed in the heat exchange pipe 626, and a second air channel 622 is formed between the heat exchange pipe 626 and the shell 625, so that heat can be diffused conveniently, and the heating efficiency is improved; also, since first air passage 612 is located outside combustion chamber 611, second air passage 622 is formed between heat exchange duct 626 and housing 625, facilitating the arrangement of flue gas passage 623, and second air passage 622 is in communication with first air passage 612.

Optionally, the branch oil pipeline 300 has an oil inlet end 320 and an oil outlet end 330, and the oil inlet end 320 and the oil outlet end 330 are respectively disposed at two sides of the burner 610 to facilitate the arrangement of the branch oil pipeline 300.

Optionally, the combustion heating apparatus 600 further comprises an air blower 650 and a smoke exhaust pipe 660, the air blower 650 being in communication with the air inlet 621 to allow more air to enter the first air passage 612 to provide sufficient air to the burner 610 for sufficient combustion of the fuel. The smoke exhaust pipe 660 is arranged at the smoke outlet 624, and the smoke exhaust pipe 660 is communicated with the heat exchange pipe 626, so that smoke generated after fuel combustion is exhausted through the smoke exhaust pipe 660, centralized purification treatment is facilitated, and environmental pollution is avoided.

In another alternative embodiment, the second air channel 622 is a spiral channel, which is beneficial to increase the contact area between the air and the heat exchange pipe 626, thereby increasing the heating efficiency. Optionally, the gas heat exchanger 620 further includes a baffle 627, the baffle 627 is disposed in the second air passage 622, the baffle 627 has a spiral structure, and the second air passage 622 is formed between the baffle 627 and the casing 625; further alternatively, the number of the baffles 627 may be one, two or more, and is not limited herein. Alternatively, the outer peripheral surface of heat exchange tube 626 may be a smooth surface, where the contact area of the outer peripheral surface with air is small; therefore, further optionally, the outer circumferential surface of the heat exchange tube 626 is provided with a second spiral fin 626c, so as to increase the contact area of the heat exchange tube 626 and the air in the second air passage 622, thereby further improving the heating efficiency of the air.

Optionally, the combustor 610 includes a swirler 615, a fuel delivery pipe 616, and a combustion nozzle 617, the swirler 615 is disposed on the inner barrel 613, the swirler 615 is sleeved outside the fuel delivery pipe 616, the combustion nozzle 617 is disposed at an end of the fuel delivery pipe 616, and the combustion nozzle 617 is located in the combustion chamber 611. The fuel delivery pipe 616 delivers fuel to the combustion nozzle 617 for ejection, and the heated air enters the combustion chamber 611 through the swirler 615 to contact with the fuel and burn to dissipate heat. Further optionally, a top cover of the swirler 615 is provided with a through hole, so that cooling air can be introduced according to actual needs to meet the combustion requirement.

The number of the heat exchange pipes 626 may be one, or may be at least two, when the number of the heat exchange pipes 626 is one, the cross-sectional area of the heat exchange pipe 626 needs to be set to be larger to meet the requirement of exhausting the flue gas from the combustion chamber 611, however, the space occupied by the heat exchange pipe 626 is larger, which results in a smaller space of the second air channel 622, which results in a lower heating efficiency of the air. Optionally, the number of the heat exchange pipes 626 is at least two, and each heat exchange pipe 626 is arranged at an interval, so that the occupied space of the heat exchange pipe 626 is reduced to increase the space of the second air passage 622, and the total area of the outer peripheral surfaces of the plurality of heat exchange pipes 626 is larger, which is beneficial to accelerating the heating efficiency of the air. The gas heat exchanger 620 further includes a partition 628, the partition 628 is disposed in the housing 625, the partition 628 is located on a side of the heat exchange pipes 626 away from the inner barrel 613, a collecting chamber 629 is provided between the partition 628 and the housing 625, one end of each heat exchange pipe 626 is respectively communicated with the collecting chamber 629, the collecting chamber 629 is communicated with the flue gas outlet 624, and the number of the flue gas outlets 624 can be reduced by collecting the flue gas in each heat exchange pipe 626 into the collecting chamber 629 and then exhausting the flue gas from the flue gas outlet 624, so as to facilitate the purification treatment of the flue gas.

In an alternative embodiment, heat exchange tubes 626 includes a first heat exchange tube 626a and a second heat exchange tube 626b, a cross-sectional area of first heat exchange tube 626a may be equal to a cross-sectional area of second heat exchange tube 626b, a central axis of first heat exchange tube 626a coincides with a central axis of inner tube 613, and a plurality of second heat exchange tubes 626b are arranged at intervals along a circumferential direction of first heat exchange tube 626a, and since heat diffuses outward from an outer circumferential surface of heat exchange tubes 626, heat will be collected in a central area of housing 625 at this time, and an area close to housing 625 has less heat, which causes uneven heating of air. Based on this, the cross-sectional area of first heat exchange conduit 626a is optionally larger than the cross-sectional area of second heat exchange conduit 626b, thereby avoiding heat from being concentrated in the central region of housing 625, thereby improving the uniformity of air heating.

In another alternative embodiment, the first pipe section 310 is a spiral pipe, so that the size of the first pipe section 310 is increased to contain more lubricant, thereby improving the heating efficiency of the lubricant; also, the first pipe section 310 is a spiral pipe, which can improve compactness of the first pipe section 310 to be accommodated in the combustion chamber 611, thereby improving space utilization of the combustion chamber 611.

In yet another alternative embodiment, the combustion heating apparatus 600 further comprises a fuel pressurizer 630, wherein the fuel pressurizer 630 is in communication with the combustor 610 to pressurize the fuel for combustion by the combustor 610 to enter the combustion chamber 611. Of course, if the pressure of the fuel itself is high, the fuel pressure booster 630 may be replaced by a fuel pressure reducer, and the fuel pressure booster 630 may be provided according to actual needs, and is not particularly limited.

In an alternative embodiment, the combustion heating apparatus 600 further includes a circulation pump 640, the circulation pump 640 is disposed in the oil transportation branch pipe 300, and the circulation pump 640 is located at the downstream of the combustor 610, so as to increase the circulation efficiency of the lubricating oil, and to shorten the heating time.

Optionally, the lubricating oil system further includes a temperature detecting element 700, the temperature detecting element 700 is disposed in the oil storage tank 100, and the temperature detecting element 700 is configured to detect the temperature of the lubricating oil in the oil storage tank 100, so as to accurately determine whether the lubricating oil meets the use requirement of the mechanical equipment.

Based on the lubricating oil system disclosed by the embodiment of the application, the embodiment of the application also provides a lubricating oil heating method, the disclosed heating method is applied to the lubricating oil system of any one of the embodiments, and the heating method comprises the following steps:

and S100, under the condition that the shutoff valve 500 is in an open state, adjusting the electromagnetic valve 400 to a first valve position so as to enable the oil storage tank 100 to be communicated with the oil transportation branch pipeline 300.

And S200, under the condition that the shutoff valve 500 is in a closed state, adjusting the electromagnetic valve 400 to a second valve position so as to disconnect the oil storage tank 100 from the oil delivery branch pipeline 300.

In the embodiment of the present application, when the shut-off valve 500 is in the open state, the electromagnetic valve 400 is located at the first valve position, so that the oil storage tank 100 is communicated with the oil transportation branch pipeline 300, and at the same time, the combustion heating device 600 heats the lubricating oil in the oil transportation branch pipeline 300, because the combustion heating device 600 adopts the fuel combustion mode to release heat, the energy conversion utilization rate is high, the heating can be performed rapidly, the fuel source is flexible, and the sustainability is provided; when the shut-off valve 500 is in the closed state, the solenoid valve 400 is located at the second valve position to disconnect the oil storage tank 100 from the branch oil delivery pipe 300, and the lubricating oil in the oil storage tank 100 can meet the use requirement of the mechanical equipment. Therefore, the problem that the heating time of the lubricating oil is long at present can be solved.

In an alternative embodiment, the combustion heating apparatus 600 includes a combustor 610, a fuel booster 630, a circulation pump 640, and an air blower 650, the combustor 610 has a combustion chamber 611, the fuel booster 630 is in communication with the combustion chamber 611, the circulation pump 640 is disposed in the oil delivery branch line 300, the circulation pump 640 is located downstream of the combustor 610, and the air blower 650 is in communication with the combustion chamber 611. The air blower 650 delivers air into the combustion chamber 611, and at the same time the fuel pressurizer 630 delivers fuel into the combustion chamber 611, so that the fuel contacts with the air and is combusted to generate heat, and further, the lubricating oil circulating in the oil delivery branch pipe 300 is heated, and the circulation pump 640 can accelerate the circulation of the lubricating oil, so that the heating time of the lubricating oil is shortened.

Step S200 specifically includes:

s210, the fuel booster 630 is turned off to extinguish the burner 610 and the shutoff valve 500 is closed.

And S220, after the first time period, closing the circulating pump 640, and adjusting the electromagnetic valve 400 to a second valve position.

And S230, after the second time period, closing the air blower 650.

When the lubricating oil in the oil storage tank 100 is heated to the temperature required by mechanical equipment, the fuel pressurizer 630 is closed firstly to shut off the burner 610, the fuel pressurizer 630 stops delivering the fuel to the combustion chamber 611, and the shut-off valve 500 is closed to stop the lubricating oil in the oil storage tank 100 from entering the combustion heating device 600; after the first time period, the circulation pump 640 is turned off, that is, the circulation pump 640 is turned off after the fuel pressurizer 630 and the shut-off valve 500 are turned off for a certain time period, so that the lubricating oil in the combustion heating device 600 completely flows into the oil storage tank 100, the lubricating oil in the combustion heating device 600 is prevented from remaining, and meanwhile, the electromagnetic valve 400 is adjusted to the second valve position, so that the oil storage tank 100 is communicated with the mechanical equipment; finally, after a second period of time, the air blower 650 is turned off, i.e., the air blower 650 is finally turned off, so that the smoke in the combustion chamber 611 is completely discharged. It should be noted that the first time period and the second time period may be equal or unequal, and the first time period and the second time period may be set according to actual needs, which is not limited specifically here.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A lubricating oil system is characterized by comprising an oil storage tank (100), an oil delivery main pipeline (200), an oil delivery branch pipeline (300), an electromagnetic valve (400), a shut-off valve (500) and a combustion heating device (600), wherein one end of the oil delivery main pipeline (200) is communicated with an oil inlet of the oil storage tank (100), the electromagnetic valve (400) is arranged on the oil delivery main pipeline (200), the electromagnetic valve (400) is provided with a first valve position and a second valve position, one end of the oil delivery branch pipeline (300) is communicated with an oil outlet of the oil storage tank (100), the other end of the oil delivery branch pipeline (300) is communicated with the electromagnetic valve (400), the combustion heating device (600) and the shut-off valve (500) are both arranged on the oil delivery branch pipeline (300), and the shut-off valve (500) is positioned at the upstream of the combustion heating device (600),

when the shut-off valve (500) is in an open state, the solenoid valve (400) is located at the first valve position, so that the oil storage tank (100) is communicated with the oil delivery branch pipeline (300); when the shut-off valve (500) is in a closed state, the solenoid valve (400) is located at the second valve position to disconnect the reservoir tank (100) from the branch oil line (300).

2. The lubrication oil system according to claim 1, wherein the combustion heating device (600) comprises a burner (610), the burner (610) having a combustion chamber (611), the first tube segment (310) of the oil delivery branch line (300) being located within the combustion chamber (611), the outer circumferential surface of the first tube segment (310) being provided with a first helical fin (311).

3. Lubricating oil system according to claim 2, characterised in that the burner (610) is provided with a first air channel (612), the first air channel (612) communicating with the combustion chamber (611), that the combustion heating device (600) further comprises a gas heat exchanger (620), that the gas heat exchanger (620) is provided with an air inlet (621), a second air channel (622), a flue gas channel (623) and a flue gas outlet (624), that the flue gas channel (623) is arranged adjacent to the second air channel (622), that the combustion chamber (611) communicates with the flue gas outlet (624) through the flue gas channel (623), and that the air inlet (621) communicates with the first air channel (612) through the second air channel (622).

4. The lubricating oil system according to claim 3, wherein the burner (610) comprises an inner barrel (613) and an outer barrel (614), the inner barrel (613) having the combustion chamber (611), the first air passage (612) being formed between the inner barrel (613) and the outer barrel (614), the gas heat exchanger (620) comprising a housing (625) and a heat exchange duct (626), the heat exchange duct (626) being disposed in the housing (625), the housing (625) being provided with the air inlet (621), the housing (625) being connected to the outer barrel (614), the flue gas passage (623) being formed in the heat exchange duct (626), and the second air passage (622) being formed between the heat exchange duct (626) and the housing (625).

5. The lubricating oil system according to claim 4, wherein the number of the heat exchange pipes (626) is at least two, each heat exchange pipe (626) is arranged at intervals, the gas heat exchanger (620) further comprises a partition plate (628), the partition plate (628) is arranged in the housing (625), the partition plate (628) is positioned on one side of the heat exchange pipe (626) far away from the inner cylinder (613), a collecting chamber (629) is arranged between the partition plate (628) and the housing (625), one end of each heat exchange pipe (626) is respectively communicated with the collecting chamber (629), and the collecting chamber (629) is communicated with the flue gas outlet (624).

6. The lubricating oil system of claim 5, wherein the heat exchange tubes (626) comprise a first heat exchange tube (626a) and a second heat exchange tube (626b), the cross-sectional area of the first heat exchange tube (626a) is larger than the cross-sectional area of the second heat exchange tube (626b), the central axis of the first heat exchange tube (626a) coincides with the central axis of the inner drum (613), and a plurality of the second heat exchange tubes (626b) are arranged at intervals along the circumference of the first heat exchange tube (626 a).

7. The lubricating oil system according to claim 3, wherein the second air passage (622) is a spiral passage, and the outer circumferential surface of the heat exchange tube (626) is provided with a second spiral fin (626 c).

8. The lubrication oil system of claim 2, wherein the first pipe section (310) is a helical pipe.

9. The lubrication oil system of claim 2, wherein said combustion heating device (600) further comprises a fuel pressurizer (630), said fuel pressurizer (630) in communication with said combustor (610).

10. The lubrication oil system according to claim 2, wherein the combustion heating apparatus (600) further comprises a circulation pump (640), the circulation pump (640) is disposed in the oil delivery branch line (300), and the circulation pump (640) is located downstream of the combustor (610).

11. A method for heating lubricating oil, applied to the lubricating oil system according to any one of claims 1 to 10, characterized by comprising:

12. The heating method according to claim 11, wherein the combustion heating apparatus includes a burner having a combustion chamber, a fuel booster communicating with the combustion chamber, a circulation pump provided in the oil delivery branch line and located downstream of the burner, and an air blower communicating with the combustion chamber,

under the condition that the shutoff valve is in the closed condition, adjust the solenoid valve to the second valve position, so that the oil storage tank with the oil transportation branch pipe way disconnection specifically includes:

closing the fuel booster to extinguish the burner and closing the shutoff valve;

after a first time period, closing the circulating pump, and adjusting the electromagnetic valve to the second valve position;

after a second period of time, the air blower is turned off.